JP5800490B2 - Heat source device, heat source control method, and heat source control program - Google Patents

Description

The present invention relates to a technique for exchanging heat from the outside such as solar heat into a fluid, and relates to, for example, a heat source device, a heat source control method, and a heat source control program using solar heat as a heat source.

  Solar heat is used as a heat source for heating water and heating medium. Since solar heat is natural energy, using it as a heat source is beneficial because it is an effective use of natural energy and there is no discharge of carbon dioxide.

  Regarding the use of solar heat, the first and second heat exchangers are installed in a hot water tank to which clean water is supplied, and the heat medium collected by the solar heat collector is circulated in the first heat exchanger for heat exchange. It is known that the heat of hot water heated by the boiler is exchanged with the second heat exchanger (for example, Patent Document 1). In this apparatus, solar heat is used for heating the clean water in the hot water tank, and the heated clean water is supplied as hot water. Moreover, the hot water heated by the boiler is used for heating and bathing.

Further, in a heat source device that uses 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 (for example, Patent Document 2).

JP 59-134432 A JP 2007-315700 A

  By the way, the use of natural energy, such as solar heat, is extremely beneficial, but is governed by natural factors. The amount of heat available from solar heat is affected by sunshine hours, seasons and weather.

  In a heat source device that uses solar heat as a heat source, by suppressing the circulation amount of the heat medium, the heat collection amount for the heat medium can be ensured by increasing the residence time of the heat medium to the heat collection panel. Further, although the circulation rate can be suppressed by setting the pump to a low rotation speed, the low rotation speed of the pump cannot be reduced below the rating in order to ensure a normal circulation rate. For this reason, the heat medium cannot obtain a sufficient amount of heat only by operating the pump at a low rotational speed and suppressing the circulation amount of the heat medium. In addition, energy consumption occurs due to operation of the pump at a low rotation speed, and efficiency is reduced.

  In addition, there is a limit to operating the pump at a low speed, and if the required lifting force cannot be obtained by installing the heat collection panel at a high place, the heat medium cannot be circulated, etc. There are inconveniences.

  Regarding such problems, Patent Documents 1 and 2 do not disclose or suggest them, and do not disclose or suggest a configuration for solving them.

Then, the objective of the heat-source apparatus of this invention, the heat-source control method, or a heat-source control program is to raise the utilization factor of heat energy and to raise heat exchange efficiency in view of the said subject.

  The heat source device, the heat source control method, or the heat source control program of the present invention has the following configuration in order to increase the utilization rate of heat energy and increase the heat exchange efficiency.

The heat source device according to the first aspect of the present invention includes a heat exchange means for exchanging heat applied from the outside to a heat receiving fluid, a heat storage means for storing heat by a heat medium in which the heat of the heat receiving fluid is heat exchanged, First temperature detecting means for detecting the outlet temperature of the heat receiving fluid flowing in the heat exchanging means, second temperature detecting means for detecting the temperature of the heat medium of the heat accumulating means, and the heat receiving means for receiving the heat. A pump for flowing fluid, and a differential temperature between the outlet temperature and the temperature of the heating medium are monitored every predetermined time, and when the differential temperature falls below a predetermined temperature, the rotational speed of the pump is reduced, If the rotational speed is the difference temperature be reached the minimum frequency is below the predetermined temperature, the pump is operated intermittently by the minimum rotation speed, control for controlling the flow amount of the heat-receiving fluid intermittently state It is the structure provided with a part.
The heat source device of the present invention further includes third temperature detecting means for detecting an inlet side temperature of the heat receiving fluid flowing in the heat exchanging means, and the control unit includes the outlet side temperature and the heat medium. When the temperature difference from the temperature falls below a reference temperature lower than the predetermined temperature, the incoming temperature is stored and compared with the outgoing temperature, and the outgoing temperature is higher than the stored incoming temperature. If it is high, the rotational speed of the pump may be controlled.

Further, out the second heat source device is a side, to detect the heat exchange means for heat exchanging heat quantity applied from the outside to the heat receiving fluid, the delivery temperature of the heat-receiving fluid flowing through the heat exchange means of the present invention Side temperature detecting means, inlet side temperature detecting means for detecting the inlet side temperature of the heat receiving fluid flowing through the heat exchanging means, and monitoring the temperature difference between the outlet side temperature and the inlet side temperature and the flow rate of the heat receiving fluid. as well as, the amount of heat applied to the heat exchange means from said difference temperature and the flow rate demanded, if the heat becomes lower than a predetermined value, a configuration and a control unit for controlling the flow rate of the heat-receiving fluid intermittently state is there.

The heat source device according to the third aspect of the present invention includes a heat exchange means for exchanging heat applied from the outside to a heat receiving fluid, and a temperature detection for detecting an inlet temperature of the heat receiving fluid flowing in the heat exchange means. Means, a pump installed in a flow path for flowing the heat-receiving fluid to the heat exchanging means, and a controller that controls the pump to intermittent operation when the inlet side temperature is equal to or lower than a predetermined temperature. .

Further, the heat source device is a fourth aspect of the present invention, a heat exchange means for exchanging heat in the heat receiving fluid heat quantity applied from the outside, the heat storage means to heat storage by the heat medium heat from the heat-receiving fluid is heat exchanged First temperature detection means for detecting the outlet temperature of the heat receiving fluid that exits from the heat exchange means, second temperature detection means for detecting the temperature of the heat medium of the heat storage means, and the heat exchange means A third temperature detecting means for detecting an inlet side temperature of the heat receiving fluid flowing through the heat exchanger, a pump installed in a flow path for flowing the heat receiving fluid through the heat exchanging means, the first temperature detecting means , the temperature detected by the temperature detecting means and a third temperature detector to monitor, when the difference between the detected temperature of the heating medium and the delivery temperature is the delivery temperature below der Ri and the predetermined temperature is higher than the entering-side temperature The pump is operated intermittently at a low rotational speed, and the heat exchange means The average flow of the heat receiving fluid flowing a configuration and a control unit that controls to less than a minimum flow rate by the continuous rotation of the pump.

Further, the heat source control method according to a fifth aspect of the present invention is heated in a heat transfer medium and a step of heat exchange in the heat exchange means to heat quantity applied from the outside to the heat receiving fluid, heat from the heat-receiving fluid is heat exchanged A step of detecting by the first temperature detecting means the temperature of the heat receiving fluid exiting from the heat exchanging means, and a step of detecting the temperature of the heat medium of the heat storage means by the second temperature detecting means. And a step of flowing the heat-receiving fluid to the heat exchanging means by a pump, and monitoring a temperature difference between the outlet temperature and the temperature of the heat medium every predetermined time , and when the temperature difference falls below a predetermined temperature, Reduce the number of revolutions of the pump, and if the differential temperature is below the predetermined temperature even when the number of revolutions of the pump reaches the minimum number of revolutions, the pump is intermittently operated at the minimum number of revolutions, and the heat receiving step of controlling the flow amount of fluid intermittently state It is configured to include a.
Moreover, the heat source control method of the present invention further includes a step of detecting an inlet side temperature of the heat receiving fluid flowing in the heat exchange means by a third temperature detecting means, and the outlet side temperature and the temperature of the heat medium. When the differential temperature falls below a reference temperature lower than the predetermined temperature, the incoming temperature is stored and compared with the outgoing temperature, and if the outgoing temperature is higher than the stored incoming temperature And a step of controlling the number of revolutions of the pump.

Further, the heat source control method according to a sixth aspect of the present invention includes the steps of heat exchange in the heat exchange means to heat quantity applied from the outside to the heat receiving fluid, the delivery temperature of the heat-receiving fluid flowing in the heat exchange means A step of detecting, a step of detecting an inlet side temperature of the heat receiving fluid flowing through the heat exchanging means, a temperature difference between the outlet side temperature and the inlet side temperature and a flow rate of the heat receiving fluid, and monitoring the difference. It determined the amount of heat applied to the heat exchange means from the warm and the flow rate, if the heat becomes lower than a predetermined value, a structure and a step of controlling the flow of the heat receiving fluid intermittently state.

Further, the heat source control method according to a seventh aspect of the present invention includes the steps of heat exchange in the heat exchange means to heat quantity applied from the outside to the heat receiving fluid, the inlet side temperature of the heat-receiving fluid flowing in the heat exchange means A step of detecting, a step of flowing the heat receiving fluid to the heat exchanging means by a pump, and a step of controlling the pump to intermittent operation when the inlet side temperature is equal to or lower than a predetermined temperature.

Further, the heat source control method according to the eighth aspect of the present invention, the heat storage by the heat medium and a step of heat exchange in the heat exchange means to heat quantity applied from the outside to the heat receiving fluid, heat from the heat-receiving fluid is heat exchanged step and a step of detecting the delivery temperature of the heat-receiving fluid exiting the heat exchange means by the first temperature detecting means, the step of detecting the temperature of the heating medium of the heat storage means by the second temperature detection means for Detecting the inlet temperature of the heat receiving fluid flowing in the heat exchanging means by a third temperature detecting means, flowing the heat receiving fluid to the heat exchanging means by a pump, and the first temperature detecting means. the temperature detected by the second temperature detecting means and a third temperature detector to monitor the delivery temperature and and the delivery temperature difference between the detected temperature is Ri der below a predetermined temperature of the heating medium is entering-side higher than the temperature, the low rotational speed of the pump It is intermittent operation, a configuration including the step of controlling the average flow rate of said heat-receiving fluid flowing in said heat exchange means to less than the minimum flow rate by the continuous rotation of the pump.

Further, the heat source control program according to a ninth aspect of the present invention, in a computer mounted in the heat source apparatus, a function to exchange heat heat quantity applied from the outside to the heat exchange means for exchanging heat in the heat-receiving fluid, said heat receiving A function of storing heat in a heat medium in which heat of the fluid is heat-exchanged, and a function of taking in detected temperature information of the first temperature detecting means for detecting the outlet temperature of the heat-receiving fluid coming out of the heat exchanging means A function of taking in the detected temperature information of the second temperature detecting means for detecting the temperature of the heat medium of the heat storage means, a function of operating a pump for flowing the heat-receiving fluid through the heat exchanging means, and the outlet temperature. The temperature difference between the heating medium and the temperature of the heating medium is monitored every predetermined time, and when the temperature difference falls below a predetermined temperature, the pump rotation speed is reduced and the pump rotation speed reaches the minimum rotation speed. The differential temperature is the predetermined If below the degree, the pump is operated intermittently by the minimum rotational speed, a configuration for executing the function of controlling the flow of the heat receiving fluid intermittently state.
Further, the heat source control program of the present invention further includes a function of taking in temperature information detected by a third temperature detecting means for detecting an incoming temperature of the heat receiving fluid flowing in the heat exchanging means, the outlet temperature and the heat. When the temperature difference from the medium temperature is lower than a reference temperature lower than the predetermined temperature, the inlet temperature is stored and compared with the outlet temperature, and the outlet temperature is stored higher than the stored inlet temperature. If the side temperature is high, the function of controlling the rotational speed of the pump may be executed.

Further, the heat source control program is a tenth aspect of the present invention, in a computer mounted in the heat source apparatus, a function to exchange heat heat quantity applied from the outside to the heat exchange means for exchanging heat in the heat-receiving fluid, the heat A function for detecting and taking in the outlet temperature of the heat receiving fluid flowing into the exchange means, a function for detecting and taking in the inlet temperature of the heat receiving fluid flowing into the heat exchanging means, and the outlet temperature and the inlet temperature. monitors the flow rate of the temperature difference and the heat receiving fluid, determined the amount of heat applied to the heat exchange means from the difference temperature and the flow rate, if the heat becomes lower than a predetermined value, the intermittent flow of said heat-receiving fluid And a function for controlling the state.

Further, the heat source control program is a eleventh aspect of the present invention, in a computer mounted in the heat source apparatus, a function to start the heat exchange heat amount applied from the outside to the heat exchange means for exchanging heat in the heat receiving fluid A function of taking in detection information of an inlet side temperature of the heat receiving fluid flowing through the heat exchange means, a function of operating a pump for flowing the heat receiving fluid through the heat exchange means, and the inlet temperature being equal to or lower than a predetermined temperature. And the function of controlling the pump to intermittent operation.

A heat source control program according to a twelfth aspect of the present invention includes a function for causing a computer mounted in a heat source device to perform heat exchange with heat exchange means for exchanging heat applied from outside to a heat receiving fluid, and the heat receiving fluid. A function of executing a process of storing heat in the heat medium in which the heat of the heat is exchanged, a function of capturing detected temperature information of the first temperature detecting means for detecting an outlet side temperature of the heat receiving fluid coming out of the heat exchanging means, A function of fetching detected temperature information of the second temperature detecting means for detecting the temperature of the heat medium of the heat storage means, and a third temperature detecting means for detecting the inlet temperature of the heat receiving fluid flowing in the heat exchanging means. a function of taking a detected temperature information, a function for operating the pump for flowing the heat receiving fluid to the heat exchange means, said first temperature detecting means, the obtained from the second temperature detection means and a third temperature detecting means When leaving the temperature information monitored and the delivery temperature difference between the detected temperature Ri der predetermined temperature below the heating medium and the delivery temperature is higher than the entering-side temperature, intermittent operation of the pump at low rpm And a function of controlling an average flow rate of the heat receiving fluid flowing through the heat exchange means to be less than a minimum flow rate due to continuous rotation of the pump.

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

  (1) The amount of heat from the outside can be efficiently converted into a heat receiving fluid, and as a result, the temperature rise of the heat receiving fluid can be increased. Therefore, the utilization rate of heat energy from the outside such as solar heat can be increased, and the heat exchange efficiency can be increased.

  (2) The flow rate of the heat receiving fluid can be controlled in an intermittent state to increase the heat collection amount of the heat receiving fluid.

  (3) Since the time for stopping the flow rate of the heat receiving fluid is set, the energy consumption for flowing the heat receiving fluid can be suppressed, the utilization rate of the heat energy can be improved, and the heat exchange efficiency can be increased.

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 heat source apparatus which concerns on 1st Embodiment. It is a figure which shows an example of an operation ratio table. It is a flowchart which shows an example of flow control. It is a figure which shows an example of the heat-source apparatus which concerns on 2nd Embodiment. It is a flowchart which shows an example of flow control. It is a figure which shows an example of the heat-source apparatus which concerns on 3rd Embodiment. It is a flowchart which shows an example of flow control. It is a figure which shows an example of the heat-source apparatus which concerns on 4th Embodiment. It is a figure which shows an example of a control apparatus and a remote control device. It is a figure which shows an example of a flow table. An example of a heat collecting panel is shown, (A) is a front view of the heat collecting panel, (B) is a right side view of the heat collecting panel, and (C) is a bottom view of the heat collecting panel. It is a flowchart which shows an example of the flow control which concerns on 4th Embodiment. It is a flowchart which shows an example of heat collection pump control. It is a figure which shows an example of the relationship between the rotation speed of a pump, and exit side detection temperature. It is a figure which shows the heating / hot-water supply / reheating apparatus which concerns on 5th Embodiment. It is a flowchart which shows an example of flow control. It is a flowchart which shows an example of flow control. It is a figure which shows the structural example of the heat collecting panel of the 1 pass system which concerns on 6th Embodiment. It is a figure which shows an example of the heat collection efficiency in each measurement day. It is a figure which shows an example of the relationship between solar radiation amount and a heat collection efficiency ratio.

[First Embodiment]

  The first embodiment includes a configuration in which the temperature and flow rate of the heat receiving fluid flowing through the heat exchange means are monitored, and when the temperature is equal to or lower than a predetermined temperature, the flow of the heat receiving fluid is controlled in an intermittent state. With reference to FIGS. 1 and 2, the first embodiment will be described. FIG. 1 is a diagram illustrating an example of a heat source device, and FIG. 2 is a diagram illustrating an example of an operation ratio table. The configuration illustrated in FIG. 1 and the table illustrated in FIG. 2 are examples, and the present invention is not limited to such a configuration.

  In the heat source device 2 shown in FIG. 1, a hot water storage tank 4 that stores hot water HM1 as a heat medium and a circulation path 6 that circulates the hot water HM1 are provided, and a solar heat collecting circuit 8 is provided as heating means for 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 amount of heat of the hot water HM2 circulated to the solar heat collecting circuit 8 is heat exchanged with the hot water HM1 in the hot water storage tank 4.

  The 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 heat receiving fluid, and exchanging the heat to the hot water HM1. The solar heat collecting circuit 8 is a sealed circuit, and includes a heat collecting panel 10, a solar heat exchanger 12, and a heat collecting pump 14. That is, even if the heat collecting pump 14 is stopped, the intrusion of air into the hot water HM2 in the heat collecting circuit 8 is prevented, and the circuit internal pressure when the pump is stopped is maintained.

  The heat collection panel 10 is an example of a heat exchange unit that collects solar heat applied from the outside and exchanges the heat (amount of heat) with the hot water HM2. The solar heat exchanger 12 is installed in the hot water storage tank 4 to exchange heat of the hot water HM2 with the hot water HM1. The heat collection pump 14 is an example of a hot water pumping means that pumps the hot water HM2 and flows it to the heat collection panel 10 and the solar heat exchanger 12. The heat collection pump 14 is, for example, a pump using a DC (direct current) motor, and has a backflow prevention function for preventing the hot water HM2 from flowing back when the pump is stopped. A temperature sensor 16 is installed on the exit side of the heat collection panel 10, and the detected temperature T <b> 1 of the temperature sensor 16 is the temperature on the exit side of the heat collection panel 10. In other words, when viewed from the solar heat exchanger 12, it represents the temperature before the heat exchange of the hot water HM2 by the solar heat exchanger 12, that is, the inlet temperature. The detected temperature T1 is used for controlling the heat collecting pump 14. As the temperature sensor 16, for example, a thermistor can be used.

  The circulation path 6 is provided with a circulation pump 18 and a load 20 that consumes the heat energy of the hot water HM1. The load 20 may be any load means that uses the amount of heat of the hot water HM1 as a heat medium, that is, a load means that dissipates heat. For example, a low temperature heater, a high temperature heater, Circuits, bath remedies, etc.

  The detected temperature T1 is taken into the control device 22 as control information, and the drive of the heat collecting pump 14 is controlled by the drive output of the control device 22. The control device 22 is configured by a computer such as a microcomputer and functions as a control unit of the heat source device 2, and includes a CPU (Central Processing Unit) 24, a ROM (Read-Only Memory) 26, and a RAM (Random-Access Memory) 28. A timer 30 is provided as a time measuring means. The CPU 24 executes a control program in the ROM 26 and controls the heat source device 2. In addition to the control program, the ROM 26 stores setting values such as temperature information and time information for controlling the flow rate as flow control information, and stores, for example, a hot water temperature setting value of the hot water HM2 after heat exchange. The ROM 26 is set with an operation ratio table 50 (FIG. 2), and stores control information for controlling the heat collecting pump 14 to intermittent operation and controlling the flow of the hot water HM2 to an intermittent state. For the storage medium such as the ROM 26 and the RAM 28, for example, an EEPROM may be used as a readable / writable nonvolatile memory.

  The hot water temperature set value is an example of a temperature set value for switching the heat collecting pump 14 from continuous operation to intermittent operation to change the flow of the hot water HM2 from the continuous state to the intermittent state, and is set to 35 [° C.], for example. The

In the operation ratio table 50 shown in FIG. 2, the rotation speed 52 of the heat collection pump 14 as the value representing the ratio of operating the heat collection pump 14, the OFF time 54 as the time for stopping the heat collection pump 14, The ON time 56 is stored as the time for operating the pump 14, and the total time 58 of the OFF time 54 and the ON time 56 is stored as one cycle of stop and operation. The rotation speed 52 stores the rotation speed when the heat collecting pump 14 is intermittently operated. This rotational speed is set to a low rotational speed in order to reduce the rotational speed during intermittent operation. During the ON time 56, when the heat collection pump 14 is rotated at a rotational speed 52, the hot water HM2 at the intake port of the heat collection panel 10 is led out from the take-out port of the heat collection panel 10, and the solar heat exchanger 12 Set the time required for passing (unit: [seconds]). The OFF time 54 is a relative value with respect to the ON time 56, and a time (unit: [second]) is set according to a desired flow rate. For example, if 1800, 95, 265, and 360 are set as the rotational speed 52, the OFF time 54, the ON time 56, and the total time 58, respectively, the operation ratio OR is
Operation ratio OR = ON time 56 / (ON time 56 + OFF time 54) (1)
Represented by
Operation ratio OR = 265/360 = 0.636 (2)

It becomes. When intermittent operation is carried out by repeating the operation of 265 [seconds] at a stop of 95 [seconds] and 1800 revolutions by the heat collecting pump 14, the average rotational speed ARN is
Average rotation speed ARN = rotation speed 52 × operation ratio OR
= 1800 × 0.736 = 1325 [rpm] (3)
It becomes. When the heat collecting pump 14 is continuously rotated, the average rotational speed ARN becomes smaller than, for example, the rated minimum rotational speed of the heat collecting pump 14, and the average flow speed of the hot water HM2 is the lowest flow speed due to continuous rotation of the heat collecting pump 14. Less than. That is, an average flow rate lower than the minimum flow rate is obtained.

  The control device 22 uses the control information such as the flow rate stored in the ROM 26 and the detected temperature T1 as control information to generate a control output by processing such as calculation. The RAM 28 configures a program execution area and temporarily stores information. The timer 30 is an example of means for generating time information for time control. The control device 22 is constituted by a microcomputer, and may be constituted by a so-called one-chip microcomputer.

  Next, FIG. 3 is referred about heat source control. FIG. 3 shows an example of the flow rate control processing procedure. The processing procedure shown in FIG. 3 is an example, and the present invention is not limited to such a configuration.

  This processing procedure is an example of the heat source control method or the heat source control program of the present invention. In the processing procedure shown in FIG. 3, the control of the heat source is executed by executing a control program in the control device 22, and the control of the heat source is performed by monitoring the detected temperature T1 and performing feedback control of the heat collecting pump. When heat is applied from the outside, the heat collecting pump 14 is operated to exchange heat applied from the outside with the hot water HM2 (step S11). Then, the detected temperature T1 and the flow rate of the hot water HM2 are monitored (step S12). Although the temperature of the hot water HM2 rises due to heat exchange, the temperature sensor 16 detects the detected temperature T1 that is the outlet temperature. The detected temperature T1 is taken into the control device 22. Further, the flow rate information of the hot water HM2 is monitored by the rotational speed of the heat collecting pump 14.

  It is determined whether the detected temperature T1 is lower than the set value (step S13). If the detected temperature T1 is lower than the hot water temperature set value (YES in step S13), the heat collecting pump 14 is intermittently operated to make the flow of the hot water HM2 intermittent. Control (step S14). If it is equal to or higher than the warm water temperature set value (NO in step S13), the process returns to step S12, and the flow rate of the detected temperature T1 and warm water HM2 is monitored and whether the detected temperature T1 is less than the set value. The judgment is repeated.

  In the intermittent state of the flow of the hot water HM2, the heat collecting pump 14 is controlled to be intermittently operated according to the rotational speed 52, the OFF time 54, and the ON time 56 stored in the ROM 26. That is, the heat collecting pump 14 is controlled to be in an intermittent state at the minimum number of rotations of the heat collecting pump 14 or the number of rotations in the vicinity thereof. In this case, the average rotation speed when the heat collection pump 14 is intermittently operated is less than the rated minimum rotation speed of the heat collection pump 14. That is, the flow rate of the hot water HM2 can be reduced according to the rotational speed of the heat collection pump 14, and the flow rate of the hot water HM2 can be controlled to be less than the flow rate (minimum flow rate) at the minimum rotational speed described above. it can. The minimum rotation speed of the heat collection pump 14 is the minimum rotation speed at which the heat collection pump 14 can be stably rotated, or the minimum rotation necessary to push up or pump the hot water HM2 to the height of the heat collection panel 10. Set the number. The minimum flow rate of the solar heat collecting circuit 8 may be derived from, for example, the structure and durability of the heat collecting panel 10.

  Thus, if the flow of the hot water HM2 is in an intermittent state, the flow of the hot water HM2 can be circulated at an average flow rate that is lower than the lowest flow rate that flows in a continuous state. The hot water HM2 from which sufficient heat absorption is obtained at this flow rate can be sent to the solar heat exchanger 12. In this intermittent operation, power consumption by the drive motor of the heat collecting pump 14 can be reduced as compared to continuous operation, and energy consumption for circulating the hot water HM2 can be reduced.

[Second Embodiment]

  The second embodiment includes a configuration that monitors the flow of heat and heat receiving fluid applied to the heat exchanging means, and controls the flow of the heat receiving fluid in an intermittent state when the amount of heat applied to the heat exchanging means decreases. Yes. The second embodiment will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of a heat source device according to the second embodiment. The configuration shown in FIG. 4 is an example, and the present invention is not limited to such a configuration. The same parts as those in FIG. 1 are denoted by the same reference numerals.

  In the solar heat collecting circuit 108, a temperature sensor 116 is installed on the entrance side of the heat collecting panel 10. The detection temperature T2 of the temperature sensor 116 represents the temperature before heat exchange of the hot water HM2 by the heat collecting panel 10, that is, the temperature on the entry side. The detected temperature T2 is used to determine the amount of heat applied to the heat collecting panel 10 together with the detected temperature T1 on the outlet side. The detected temperatures T <b> 1 and T <b> 2 are taken into the control device 22 as control information and used for controlling the heat collecting pump 14.

  The control device 22 monitors the amount of heat applied to the heat collection panel 10, that is, the amount of heat exchanged with the hot water HM2, and the flow rate of the hot water HM2, controls the rotation of the heat collection pump 14, and controls the flow rate of the hot water HM2. .

The amount of heat applied to the heat collection panel 10 is proportional to or nearly proportional to the amount of heat obtained by the hot water HM2 by heat exchange of the heat collection panel 10. The amount of heat obtained by the hot water HM2 is proportional to a value (ΔT ₁₂ × L1) obtained by multiplying the difference ΔT ₁₂ (ΔT ₁₂ = T1−T2) between the outlet side temperature (T1) and the inlet side temperature (T2) by the flow rate L1 of the hot water HM2. . The heat applied to the heat collection panel 10 can be monitored by the detected temperatures T1 and T2 and the flow rate of the hot water HM2. Since the ROM 26 stores the stop time (OFF time 54) of the heat collecting pump 14 and the operation time (ON time 56) of the heat collecting pump 14 as flow rate control information, the control device 22 stores the information in the ROM 26. Control output is generated by processing such as calculation using the control information and the detected temperatures T1 and T2 as control information.

  Next, FIG. 5 is referred about heat source control. FIG. 5 shows an example of a flow rate control processing procedure. The processing procedure shown in FIG. 5 is an example, and the present invention is not limited to such processing.

  This processing procedure is an example of the heat source control method or the heat source control program of the present invention. In the processing procedure shown in FIG. 5, when heat is applied from the outside, the heat collecting pump 14 is operated to exchange heat from the outside with the hot water HM2 (step S31). As the heat applied to the hot water HM2, the temperature and flow rate are monitored (step S32). The temperature sensor 16 detects a detected temperature T <b> 1 that is the outlet temperature of the heat collection panel 10. The temperature sensor 116 detects a detected temperature T <b> 2 that is the incoming temperature of the heat collection panel 10. The amount of heat exchanged by the heat collecting panel 10 is obtained from the difference between the detected temperatures T1 and T2. That is, the amount of heat can be calculated from the flow rate of the hot water HM2 and the differential temperature depending on the rotation speed of the heat collecting pump 14.

  Therefore, the control device 22 determines the flow rate information of the hot water HM2 from the number of rotations of the heat collection pump 14, and determines the heat collection panel from the number of rotations (rotation speed) of the heat collection pump 14 and the temperature difference between the detected temperatures T1-T2. The amount of heat applied to 10 is determined. This heat quantity is monitored, and if this heat quantity falls below the threshold (YES in step S33), the flow rate of the hot water HM2 is set to intermittent control (step S34), and the process returns to step S32. What is necessary is just to control the heat collection pump 14 to the intermittent state which repeats rotation and a stop for intermittent control of a flow volume. If the amount of heat has not decreased (NO in step S33), the process returns to step S32, and the processes in steps S33 and S34 are repeated.

  When the amount of heat applied to the heat collecting panel 10 decreases, the heat collecting pump 14 is controlled to intermittent operation, so that the hot water HM2 can be retained in the heat collecting panel 10 and the amount of heat exchange with the hot water HM2 is increased. Can do. That is, the flow rate by the intermittent control can be controlled to a low and gentle flow rate of the hot water HM2 by the above-described minimum rotational speed by continuous operation of the heat collecting pump 14, and the heat exchange amount can be increased.

[Third Embodiment]

  The third embodiment includes a configuration that monitors the temperature and flow rate of the heat receiving fluid flowing from the heat exchange means, and controls the flow of the heat receiving fluid to an intermittent state when the temperature is equal to or lower than a predetermined temperature. The third embodiment will be described with reference to FIG. FIG. 6 is a diagram illustrating an example of a heat source device according to the third embodiment. The configuration shown in FIG. 6 is an example, and the present invention is not limited to such a configuration. The same parts as those in FIGS. 1 and 4 are denoted by the same reference numerals.

  In the solar heat collecting circuit 208, a temperature sensor 116 is installed on the entrance side of the heat collecting panel 10. The detection temperature T2 of the temperature sensor 116 represents the temperature before heat exchange of the hot water HM2 by the heat collection panel 10, that is, the incoming temperature.

  The detected temperature T2 is taken into the control device 22, and the heat collecting pump 14 is controlled by the detected temperature T2. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  Next, FIG. 7 is referred about heat source control. FIG. 7 shows an example of the flow rate control process. The flowchart shown in FIG. 7 is an example, and the present invention is not limited to such a configuration.

  This processing procedure is an example of the heat source control method or the heat source control program of the present invention. In the processing procedure shown in FIG. 7, the heat source control is executed by executing a control program in the control device 22. This heat source control monitors the flow rates of the detected temperature T2 and the hot water HM2, and uses these as control information to control the rotation of the heat collection pump 14, that is, the circulation flow rate.

  By the operation of the heat collection pump 14, the amount of heat applied to the heat collection panel 10 is exchanged with the hot water HM2 (step S41). During this heat exchange, the incoming temperature and flow rate of the hot water HM2 of the heat collecting panel 10 are monitored (step S42). The incoming temperature is detected by the temperature sensor 116, and the detected temperature T <b> 2 is taken into the control device 22. The flow rate of the hot water HM2 is detected by the number of rotations of the heat collection pump 14. In this case, it is determined whether the detected temperature T2 is less than the set value (step S43). If the detected temperature T2 is less than the set value (YES in step S43), the heat collecting pump 14 is controlled to intermittent operation (step S44), and the process returns to step S42. If the detected temperature T2 is equal to or higher than the set value (NO in step S43), the process returns to step S42, and the determination in step S43 is performed.

  In the intermittent control (step S44), the rotational speed of the heat collecting pump 14 is controlled in an intermittent state based on the rotational speed 52, the OFF time 54, and the ON time 56 of the operation ratio table 50 stored in the ROM 26. In this intermittent control, the heat collecting pump 14 is operated in an intermittent state by rotating at or near the rated minimum rotational speed. As a result, the average rotational speed of the heat collecting pump 14 is an average value of the OFF time 54 and the ON time 56, and is less than the minimum rotational speed described above. As a result, the flow rate of the hot water HM2 corresponds to the average rotation speed of the heat collection pump 14, and is less than the flow rate (minimum flow rate) when the heat collection pump 14 is rotated at the minimum rotation speed.

  Thus, since the flow rate of the hot water HM2 is in an intermittent state, the average flow rate is lower than the continuous circulation flow rate, and the heat collection panel 10 can increase the heat exchange rate. And since the intermittent state of the flow volume of warm water HM2 is performed by the intermittent operation of the heat collecting pump 14, energy consumption can be reduced as stated above.

  In this case, the heat source is controlled by monitoring the detected temperature T2 and controlling the heat collecting pump 14 (for example, feedforward control or feedback control). In the monitoring of the temperature and the flow rate, instead of monitoring the outlet temperature of the hot water HM2 with respect to the heat collecting panel 10 of the first embodiment (step S12 in FIG. 3), the inlet temperature (T2) of the hot water HM2 with respect to the heat collecting panel 10 ) To determine whether or not the detected temperature T2 is less than the hot water temperature set value. The set value of the hot water temperature is set in the heat collecting panel 10 with respect to the incoming side temperature and stored in the ROM 26.

  The inlet temperature of the hot water HM2 is a determination target for controlling the heat collecting pump 14 to intermittent operation to make the flow of the hot water HM2 intermittent. The hot water HM2 can be circulated by a low flow rate that cannot be obtained by flowing the flow rate continuously. For this reason, the warm water sufficiently warmed by the heat collecting panel 10 can be sent to the solar heat exchanger 12, and the energy consumption for flowing the warm water HM2 is suppressed.

[Fourth Embodiment]

  In the fourth embodiment, the temperature difference between the outlet side temperature of the heat collecting panel and the temperature of the heat storage means is monitored, and when the temperature is equal to or lower than a predetermined temperature, the flow of the heat receiving fluid is controlled in an intermittent state. Is included. This fourth embodiment will be described with reference to FIGS. FIG. 8 shows an example of a heat source device, FIG. 9 shows an example of a control device and a remote control device, and FIG. 10 shows an example of a flow rate table. FIG. 11 shows an example of the heat collection panel. The same parts as those in FIGS. 1, 4 and 6 are denoted by the same reference numerals. The configurations shown in FIGS. 8 to 11 are examples, and the present invention is not limited to such configurations.

  8 includes temperature sensors 316 and 317 in addition to the temperature sensor 16 and the temperature sensor 116. The solar heat collection circuit 308 includes a heat collection switching valve 332 and a bypass passage 334. Is provided.

  The temperature sensor 316 is installed near the outlet side of the hot water storage tank 4 and detects the temperature T3 of the hot water HM1 that is a heat medium. The detected temperature T3 is used for controlling the flow rate of the hot water HM2 together with the detected temperature T1.

  The temperature sensor 317 is installed in the installation area of the circulation path 6, and the outside air temperature Tout is detected by the temperature sensor 317.

  The bypass passage 334 is branched from the solar heat collection circuit 308 via the heat collection switching valve 332 and is a side path of the solar heat exchanger 12. If the temperature of the hot water HM2 is low, the hot water HM2 is circulated to the bypass line 334 side to limit the hot water HM2 flowing into the hot water storage tank 4 side. The detected temperature T1 of the temperature sensor 16 and the detected temperature T2 of the temperature sensor 116 are used for opening / closing the bypass passage 334 and controlling the heat collection pump 14 by switching the heat collection switching valve 332.

  These detected temperatures T1 to T3 and Tout are taken into the control device 22 as control information, and the heat collection pump 14 and the heat collection switching valve 332 are controlled by the drive output and switching output of the control device 22.

  As shown in FIG. 9, the control device 22 takes in the detected temperatures T1 to T3 and Tout from the temperature sensors 16, 116, 316, and 317. Then, the rotation of the heat collecting pump 14 is controlled to control the flow rate of the hot water HM2.

  A remote control device 342 is connected to the control device 22 by wire or wirelessly. The remote control device 342 is a user operation device, and includes a control unit 344, an operation unit 346, and a display unit 348, and is installed in the user's living area.

  The control unit 344 receives an operation input from the operation unit 346 and notifies the control device 22 of control information based on the operation input. The operation unit 346 includes a keyboard, a touch sensor, and the like. The control unit 344 is configured by a computer and includes a CPU 350, a ROM 352, a RAM 354, and the like. The CPU 350 executes a control program stored in the ROM 352 and generates a control output. The RAM 354 constitutes a program execution area. The control unit 344 cooperates with the control device 22, outputs a control command to the control device 22, receives output information from the control device 22, and provides a display output indicating a control state or the like to the display unit 348.

  The display unit 348 performs a visible display based on the presentation output provided from the control unit 344 based on the display control of the control unit 344.

  A flow rate table 360 is set in the ROM 2 6 of the control device 22. In addition, for example, a time table that defines the execution time of the combustion operation control may be set in the ROM 26.

  In the flow rate table 360 shown in FIG. 10, for example, TBL (0), TBL (1),..., TBL (5) are set as the flow level 362 of the hot water HM2 flowing through the solar heat collecting circuit 308. Further, the pump rotation speed 364 of the heat collection pump 14 is stored corresponding to each level TBL as the flow rate flowing through the solar heat collection circuit 308. For example, 1800 [rpm], 2200 [rpm], 2600 [rpm], 3000 [rpm], 3500 [rpm], and 4000 [rpm] are set for the pump rotation speed 364 as stepwise values, and stored as rotation speed information. Is done. The pump rotational speed of TBL (0) is set to, for example, the minimum rotational speed of the heat collecting pump 14 or a value near the minimum. Is set, and the pump rotational speed 364 from TBL (0) to TBL (4) is increased as the level 362 increases. Note that the minimum number of revolutions of the pump is the number of revolutions necessary to stably rotate the pump, and is set based on the number of revolutions necessary for pushing up or pumping the hot water HM2 to the height of the heat collecting panel 10. The maximum flow rate of the heat collection circuit 308 is derived from, for example, the structure and durability of the heat collection panel 10.

  In this embodiment, a header type heat collecting panel 10 is used. This heat collecting panel 10 has a rectangular flat plate shape as shown in each drawing of FIG. 11 (A is a plan view thereof, B is a side view showing a side surface in the longitudinal direction, and C is a side view showing a side surface in the short direction). A housing portion 391 is provided. The housing portion 391 includes a protective cover 392 that protects the inside of the housing portion 391 on the upper surface side that receives sunlight, and the protective cover 392 is formed of, for example, a light transmissive material. In this embodiment, as shown in FIG. 11A, a part of the protective cover 392 is omitted, and the inside of the housing portion 391 is exposed.

  The casing 391 includes a pipe through which the hot water HM2 flows. An inlet header pipe 394 and an outlet header pipe 396 are spaced apart from each other in the longitudinal direction of the casing 391, and the inlet header pipe 394 and the outlet header pipe 396 are arranged opposite to each other. Connected by a plurality of transition pipes 401, 402, 403,. An inlet 412 for introducing the hot water HM2 is formed at one end of the inlet header pipe 394, and a cap 414 is disposed at the other end to close the inlet of the inlet header pipe 394. A cap 416 is disposed at one end of the outlet header pipe 396 to close the outlet port of the outlet header pipe 396, and an outlet 418 for the hot water HM2 to be led out is formed at the other end. The inlet 412 and the outlet 418 are arranged on the diagonal of the heat collecting panel 10 or in the vicinity of the diagonal to suppress variation in the flow rate of hot water flowing through the transition pipes 401, 402, 403,. .

  Since other configurations are the same as those of the second embodiment, the description thereof is omitted.

  Next, the heat collecting operation for heating the hot water HM1 will be described with reference to FIGS. FIG. 12 shows an example of the flow rate control processing procedure, FIG. 13 shows an example of the heat collection pump control processing procedure, and the processing procedure (subroutine) of the heat collection pump control shown in FIG. 12 (step S59 in FIG. 12). An example is shown. The processing procedure shown in FIGS. 12 and 13 is an example, and the present invention is not limited to such processing.

  This processing procedure is an example of the heat source control method or the heat source control program of the present invention. The processing procedure shown in FIG. 12 is a solar heat collecting operation, in which hot water HM2 is circulated through the solar heat collecting circuit 308, the solar heat is heat-exchanged with the hot water HM2, and the heat of the hot water HM2 is for solar heat in the hot water storage tank 4. In this operation, the heat exchanger 12 exchanges heat with the hot water HM1. This heat collecting operation is executed by executing a control program in the control device 22.

  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.]]. Therefore, in 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, even in the winter season. There is a temperature rise of 30 [[° C]], and the hot water temperature of the hot water storage tank 4 can be raised to about 60 [[° C]] by 30 [[° C]] + 30 [[° C]]. In this case, the hot water in the hot water storage tank 4 can be used for heat dissipation of the low-temperature heater. Of course, more heat can be used in summer.

  With respect to the solar heat that can be used for the solar heat collecting circuit 308, the sunrise and sunset times vary depending on the season, and the time zone with solar radiation also varies. The control unit of the control device 22 calculates the average minimum temperature from the outside air temperature Tout and the time measurement by the timer 30. A change in season can be determined from the average minimum temperature, and the start time and end time of the heat collection operation can be controlled according to the season. Initial setting values such as the current time are initially set in the control device 22 through the remote control device 342 (step S51).

  In this heat collection operation, a heat collection start operation P1, a heat storage operation P2, a heat collection execution determination operation P3, and a heat collection stop operation P4 are performed.

  (1) Heat collection start operation (P1)

  In the processing procedure shown in FIG. 12, when initial setting is performed (step S51), it is determined whether it is an operation time zone (for example, 7:00 to 17:00) (step S52). If it is not the operation time zone (NO in step S52), the confirmation of the operation time zone is continued. If it is the set operation time zone (YES in step S52), the heat collecting switching valve 332 is operated to close the hot water storage tank 4 side (step S53), and the detected temperature T3 is set as a predetermined value, for example, higher than the temperature Tmax. It is determined whether the temperature is reached (step S54). Tmax is an overheat prevention temperature value for preventing overheating of the hot water HM1 in the hot water storage tank 4, and is set to 80 [° C.] (stored in the ROM 26), for example.

  If the detected temperature T3 is higher than the temperature Tmax (YES in step S54), it is not necessary to heat the hot water HM1 in the hot water storage tank 4, and therefore the operation from step S52 to step S54 is repeated to maintain the pump stopped state. If the detected temperature T3 is equal to or lower than Tmax (NO in step S54), the number n of level 362 in the flow rate table 360 (FIG. 10) is set to 2 (step S55), and the heat collecting pump 14 is set to TBL (n). , N = 2, that is, the pump is operated at the pump speed (2600 [rpm]) of TBL (2) (step S56). Since the hot water storage tank 4 side is closed by the heat collecting switching valve 332, the hot water HM2 circulates in the solar heat collecting circuit 308 through the bypass 334, and stores the solar heat in the hot water HM2. n is an integer from 0 to 5 representing the level 362, and TBL (n) where N = 2 indicates that the level 362 is TBL (2). The n value is a variable that is changed by executing the flow rate control, and is stored in the RAM 28, for example.

  The detected temperature T1 is the temperature of the hot water HM2 heated by solar heat. The detected temperature T1 is compared with the detected temperature T3 (step S57). If T1> T3 + 2 [° C.] (YES in step S57), Since the heat of the hot water HM2 can be exchanged with the hot water HM1, the process proceeds to the heat storage operation P2, and if T1> T3 + 2 [° C.] (NO in step S57), the heat collection panel 10 determines whether heat is collected. Therefore, the process proceeds to the heat collection execution determination operation P3.

  (2) Thermal storage operation (P2)

  The heat collection switching valve 332 is operated to open the hot water storage tank 4 side (step S58), and the circulation through the bypass passage 334 is switched to the circulation through the solar heat exchanger 12. At this time, the heat collecting pump 14 is controlled (step S59), and the amount of heat of the hot water HM2 is exchanged with the hot water HM1.

  While the solar heat is stored in the hot water HM2 and the heat of the hot water HM2 is exchanged with the hot water HM1, it is determined whether T3> Tmax (step S60). If the temperature of T3 has not reached Tmax or Tmax (NO in step S60) ), Returning to the comparison between the detected temperature T1 and the detected temperature T3 (step S57), the heat storage operation P2 is repeated or the process proceeds to the heat collection execution determination operation P3. If the temperature of T3 exceeds Tmax (YES in step S60), it is not necessary to heat the hot water HM1 in the hot water storage tank 4, and therefore, the process proceeds to the heat collection stop operation P4 to reduce energy consumption by the pump.

  (3) Heat collection execution judgment operation (P3)

  In this heat collection execution determination operation, it is determined whether the heat collection panel 10 is collecting heat by heat exchange. For this reason, the hot water storage tank 4 side is closed by the heat collection switching valve 332, or if it is in the closed state, the closed state is maintained (step S61), and the temperature of the detected temperature T2 is stored (step S62). The detected temperature T2 is stored in the RAM 28 as the temperature T2 ′, for example. The detected temperature T1 and the detected temperature T2 ′ are compared after elapse of t [seconds] (step S63). If T1> T2 ′ (YES in step S63), the heat collecting panel 10 collects heat. The heat pump 14 is controlled (step S59) to collect heat by heat exchange. If T1> T2 ′ is not satisfied (NO in step S63), heat collection is not possible, and the process proceeds to heat collection stop operation P4.

  (4) Heat collection stop operation (P4)

  The heat collecting pump 14 is stopped (step S64), and after a predetermined interval (step S65), the operation time zone is determined (step S52).

  (5) Heat collection pump control operation

The warm water HM1 is heated through an operation of storing solar heat in the warm water HM2 and an operation of exchanging heat of the warm water HM2 with the warm water HM1. At this time, if the temperature difference (ΔT ₁₃ : ΔT ₁₃ = T1−T3) between the outlet temperature of the hot water HM2 (detected temperature T1) and the temperature of the hot water HM1 (detected temperature T3) is set to 5 ° C. or more, for example, the hot water HM1 is It can be heated efficiently. When ΔT ₁₃ is larger than 7 ° C., the hot water HM2 flowing through the heat collecting panel 10 is increased, and a large amount of hot water HM2 having ΔT ₁₃ between 5 ° C. and 7 ° C. is heat-exchanged for solar heat. When supplied to the vessel 12, the hot water HM1 can be heated more efficiently. For this reason, the control device 22 controls the heat collection pump 14 based on T1 and T3 (step S59 in FIG. 12). In other words, as an example, the range of 5 [° C.] to 7 [° C.] is that, considering the power consumption on the heat collecting pump 14 side, considering the efficiency, it is efficient to set the temperature difference to this level. It is beneficial. However, the temperature range is not limited to 5 [° C.] to 7 [° C.].

  The heat collection pump control operation will be described with reference to FIG. The processing procedure shown in FIG. 13 is an example of the heat source control method or the heat source control program of the present invention. In the processing procedure shown in FIG. 13, a level changing operation SP1 for changing the rotational speed of the heat collecting pump 14 and an intermittent operation control operation SP2 for causing the heat collecting pump 14 to operate intermittently are performed. The level changing operation SP1 measures time by the timer 30 (FIG. 2) of the control device 22, and performs sampling at a timing of once every 3 minutes, for example. The control device 22 determines whether or not it is a sampling timing (step S71), and if it is a sampling timing (YES in step S71), the level shift operation SP1 is entered, and if it is not a sampling timing (NO in step S71), the level is reached. The change operation SP1 is skipped (jumped over), and the process proceeds to the intermittent operation control operation SP2.

  (5-1) Level change operation (SP1)

In the level changing operation, a temperature difference ΔT ₁₃ between the outlet temperature of the heat collecting panel 10 of the hot water HM2 and the outlet temperature of the hot water storage tank 316 of the hot water HM1 is calculated, and this temperature difference ΔT ₁₃ is calculated with a plurality of temperature set values. In contrast, the value of the temperature difference ΔT ₁₃ is determined. Then, the level for controlling the rotation of the heat collecting pump 14 is determined according to the range of the value of the temperature difference ΔT ₁₃ , and this level is changed. The plurality of temperature set values are stored in the ROM 26 as level change set values. When the level is changed, based on the operation ratio table 50 and the flow rate table 360, the rotational speed of the heat collecting pump 14 is increased or decreased, and the operation state is changed between continuous operation and intermittent operation.

When the temperature difference ΔT ₁₃ is calculated (step S72), whether or not the temperature difference ΔT ₁₃ <3 [° C.] (step S73), whether or not the temperature difference ΔT ₁₃ <5 [° C.] (step S74), and the temperature difference ΔT ₁₃ Whether or not ≧ 10 [° C.] (step S75) and whether or not the temperature difference ΔT ₁₃ ≧ 7 [° C.] (step S76) are determined in order. If the temperature difference [Delta] T ₁₃ <3 [℃] (YES in step S73), to raise the temperature difference [Delta] T _13, the TBL (n) by subtracting 2 from the number n of level 362 lowers 2 level (step S77). If the temperature difference ΔT ₁₃ <3 [° C.], not the temperature difference ΔT ₁₃ <5 [° C.] (NO in step S73 and YES in step S74), the temperature difference ΔT ₁₃ is increased to increase the temperature difference ΔT ₁₃ . By subtracting 1 from the number n, TBL (n) is lowered by one level (step S78). When lowering TBL (n), it is determined whether n <0 (step S79). If n <0 (YES in step S79), the number n of level 362 is changed to 0, and TBL (0) is set. (Step S80).

Temperature difference [Delta] T ₁₃ <5 instead [℃], if the temperature difference [Delta] T ₁₃ ≧ 10 [℃] (YES of NO and step S75 in step S74), for reducing the temperature difference [Delta] T _13, number of levels 362 n And TBL (n) is increased by two levels (step S81), and if the temperature difference ΔT ₁₃ ≧ 7 [° C.], not the temperature difference ΔT ₁₃ ≧ 10 [° C.] (NO in step S75 and step S76) YES), in order to decrease the temperature difference ΔT ₁₃ , TBL (n) is increased by 1 by adding 1 to the number n of level 362 (step S 82). When increasing TBL (n), it is determined whether n> 5 (step S83). If n> 5 (YES in step S83), the number n of level 362 is changed to 5, and TBL (5) is set. (Step S84). If n> 5 is not satisfied (NO in step S83), the process proceeds to step S85.

When the temperature difference ΔT ₁₃ <5 ° C. is not satisfied and the temperature difference ΔT ₁₃ ≧ 7 ° C. is not satisfied, that is, 5 ° C. ≦ ΔT ₁₃ <7 ° C. (NO in step S76), the hot water HM1 Since there is a temperature difference range difference that is efficient for heat exchange, the process proceeds to the intermittent operation control operation SP2 without changing the level.

  (5-2) Intermittent operation control operation (SP2)

  It is determined whether the value of n of TBL (n) after level change or level maintenance is 0 (step S85). If n = 0 is not satisfied (NO in step S85), the flow rate table 360 is referred to, the rotational speed of the heat collection pump 14 is set to the rotational speed of TBL (n), and the heat collection pump 14 is turned on (operation). (State) is maintained (step S88), the heat collecting pump control operation is exited, and the process returns to step S60.

  If n = 0 (NO in step S85), the set value of the operation ratio table 50 is read and the heat collecting pump 14 is intermittently operated. Since the intermittent operation is a repetition of an OFF time 54 (for example, 95 [seconds]) and an ON time 56 (for example, 265 [second]), the intermittent operation is performed based on the information of the timer 30 that measures the elapsed time. Is OFF time (step S86). If it is OFF time (YES in step S86), the heat collecting pump 14 is turned off and stopped, or if it is in the stopped state, the heat collecting pump 14 is maintained stopped (step S87). Further, when the intermittent operation is not the OFF time (NO in step S86), the heat collecting pump 14 is turned on and operated, or the operation state of the heat collecting pump 14 is maintained (step S88). After such operation, the process proceeds to step S60, and when the heat storage operation P2 is repeated, the intermittent operation control operation SP2 operates every time the heat storage operation P2 is repeated, and the level change operation SP1 operates once every three minutes. become.

  When the heat collecting pump 14 is stopped for a predetermined time, for example, for 95 seconds, and then operated for a predetermined time longer than, for example, 265 seconds, the change in the detected temperature T1 is, for example, FIG. become that way. Since the warm water HM2 stays at the OFF time 54, the warm water HM2 staying at the position of the temperature sensor 16 naturally increases or decreases depending on the temperature of the outside air. In the ON time 56, since the heat collection pump 14 rotates at 1800 [rpm], the hot water HM2 staying in the heat collection panel 10 is detected by the temperature sensor 16, and the detected temperature rises as in time 60. By rotating the heat collecting pump 14 until the ON time 56 ends, the hot water HM2 staying in the heat collecting panel 10 is sent to the solar heat exchanger 12. In the example shown in FIG. 14, the effect of increasing the warm water HM2 by a predetermined temperature or more, for example, 1 [° C.] or more is obtained by intermittent operation.

  The features and advantages of the above embodiment are listed below.

  (1) Since this heat source device 302 uses solar heat as a heat source applied from the outside, the heat collecting operation is performed at a time when there is solar radiation, and heat is stored in the hot water storage tank 4. When the amount of solar radiation is low due to low solar radiation, such as after sunrise or before sunset, or when the solar radiation is low due to weather conditions, intermittent operation of the heat collection pump 14 is performed, and the flow of hot water circulating through the solar heat collection circuit 308 is continuously operated. The heat is collected at a lower temperature than when it is used. By intermittently operating the pump, the hot water HM2 is temporarily retained in the heat panel 10, the heat collected by the heat collection panel 10 is exchanged with the hot water HM2, and the temperature of the hot water HM2 is increased. On the other hand, the operation of the heat collecting pump 14 is intermittent, and energy consumption is suppressed during the stopped time zone. For this reason, solar heat can be stored more effectively.

  (2) In the heat source device based on the premise that the heat collection pump is operated continuously, the temperature rise of the hot water HM2 due to solar heat is limited in an environment where the amount of solar radiation is low. If the rotational speed of the heat collecting pump 14 is further slowed down, the rotation of the pump becomes unstable or the lifting force becomes insufficient, and the hot water HM2 cannot be circulated, and consequently heat collection cannot be performed. In the heat source device 302, when the amount of solar radiation is low or when the amount of solar radiation is low, the heat collecting pump 14 is forcibly intermittently operated, and the pump is stopped (OFF) and the pump is operated (ON) repeatedly. Thereby, the operation | movement of a substantially low rotation speed which cannot be obtained by operating a pump continuously is implement | achieved, and heat collection efficiency can be improved.

  (3) Solar heat increases and decreases according to the time, season and weather, and the amount of solar heat varies. For this reason, it is not possible to obtain a sufficient amount of heat by operating the pump used for circulating the heat medium at a low rotational speed and suppressing the circulation amount of the heat medium, and the pump is operated at a low rotational speed. There is an inconvenience that energy consumption occurs due to this, and thermal efficiency cannot be sufficiently obtained. In addition, there is a limit to operating the pump at a low rotational speed, and when the required lifting force cannot be obtained, there is an inconvenience that the heat medium cannot flow even if the pump rotates. In the above embodiment, such inconvenience is improved. Specifically, the pump rotation speed is intermittent, and the circulation rate of the heat medium is reduced to the circulation flow rate at the minimum pump rotation speed, realizing a circulation flow rate below the minimum rotation speed of the installed pump. Yes. As a result, it becomes possible to circulate the heat medium below the minimum number of rotations due to continuous rotation of the pump, and the residence time of the heat medium in the heat collecting panel 10 can be substantially lengthened, increasing the heat energy recovery rate, The exchange efficiency is improved.

  (4) Although it is theoretically possible to slow down the pump speed and reduce the circulation rate of the heat medium to increase the residence time of the heat medium, the heat medium can be increased by intermittently rotating the pump speed. As a result, the amount of collected heat is increased and the heat exchange efficiency is improved.

(5) Further, in the header type heat collecting panel, since a plurality of transition pipes are arranged, it is easy to increase the amount of the heat receiving fluid that passes through the heat collecting panel. In an environment where much solar heat is irradiated from the sun, the value of ΔT ₁₃ becomes too large, for example, it may exceed the range of 5 [° C.] to 7 [° C.]. Therefore, according to the header type heat collecting panel, the hot water HM1 can be efficiently heated.

[Fifth Embodiment]

  The fifth embodiment discloses a heating / hot water supply / remembrance device. This heating / hot water supply / remembrance device will be described with reference to FIG. FIG. 15 shows a configuration example of a heating / hot water supply / remembrance device. The configuration illustrated in FIG. 15 is an example, and the present invention is not limited to such a configuration. 15, the same parts as those in FIGS. 1, 4, 6, 8, and 9 are denoted by the same reference numerals.

  A heating / hot water supply / remembrance device 502 shown in FIG. 15 is an example of the heat source device of the present invention. Hot water storage tank 4, heat collection panel 10, solar heat exchanger 12, heat collection pump 14, temperature sensors 16, 116, 316, 317, circulation pump 18, heat collection switching valve 332, bypass path Since 334 and the control device 22 are the same as those in the fourth embodiment, description thereof is omitted.

  The solar heat collecting circuit 508 is provided with a pressure tank 510 and a reserve tank 512. The pressure tank 510 is an example of a storage tank that accumulates the hot water HM2. When the hot water HM2 flowing through the solar heat collecting circuit 508 rises, the pressure tank 510 causes the hot water HM2 to flow out from the solar heat collecting circuit 508 to the reserve tank 512, and solar heat. When the hot water HM2 is insufficient in the heat collecting circuit 508, the hot water HM2 is sucked from the reserve tank 512. For this reason, a connecting pipe 516 is connected to the pressure cap 514, and the connecting pipe 516 is inserted into the reserve tank 512 and submerged in the hot water HM 2 in the reserve tank 512.

  The reserve tank 512 is an example of a storage tank that stores the hot water HM2, and stores the hot water HM2 that flows out of the pressure tank 510 or is supplied to the pressure tank 510. The reserve tank 512 is provided with a water level sensor 518 that detects the water level of the hot water HM2. An overflow pipe 520 is connected to the reserve tank 512, and the overflow pipe 520 discharges the hot water HM2 that exceeds the upper limit level of the reserve tank 512.

  A water level confirmation tank 522 is connected to the hot water storage tank 4 as a water level confirmation means for the hot water HM1 by a communication pipe 524, and the water level confirmation tank 522 and the hot water storage tank 4 are connected to each other by a vent pipe 526 and are opened to the atmosphere. A water level sensor 528 is installed in the water level confirmation tank 522. The hot water HM1 in the hot water storage tank 4 flows into the water level confirmation tank 522 through the communication pipe 524, and the water level in the water level confirmation tank 522 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 528 can obtain a detection output indicating the level of the hot water HM1 in the hot water storage tank 4.

  The water level confirmation tank 522 is connected to a supply pipeline 530 for supplying makeup water, and the supply pipeline 530 is connected to a water supply pipeline. A supply water closing valve 532 and a supply water electromagnetic valve 534 are installed in the supply line 530. The makeup water closing valve 532 is always opened, and the supply of makeup water is controlled by the makeup water electromagnetic valve 534. Clean water W is used as makeup water.

  The circulation path 536 includes a branch flow path 538, the circulation pump 18, a primary heat exchanger 540 for heating the hot water HM1, and a secondary heat exchanger 542.

  The diversion channel 538 is a pipe connected to a circulation path 536 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 to join the hot water HM1 on the exit side of the hot water storage tank 4. It is an example.

  A hot water storage tank switching valve 544 is installed at a branch point between the circulation path 536 and the branch flow path 538, and the hot water storage tank switching valve 544 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 538. It is an example of the flow volume distribution means to do. A temperature sensor 546 is installed in the circulation path 536 on the inlet side of the hot water tank switching valve 544, an on-off valve 548 is installed in the circulation path 536 on the inlet side of the hot water tank 4, and a temperature sensor 316 is installed in the vicinity of the outlet side of the hot water tank 4. Yes. The on-off valve 548 is means for opening and closing the circulation path 536 on the entry side of the hot water storage tank 4. The detected temperatures T3 and T4 of the temperature sensors 316 and 546 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 538. The temperature sensor 316 is a temperature sensor that detects the temperature of the hot water HM1 that is a heat medium, and the temperature sensor 546 is a temperature sensor that detects the temperature of the hot water HM1 that returns from the load side to the circulation path 536. A gas-liquid separator 550 is installed at the junction of the circulation path 536 and the branch path 538 on the outlet side of the hot water storage tank 4. The gas-liquid separator 550 is a means for separating air from the hot water HM1.

  The circulation pump 18 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 540 and the secondary heat exchanger 542, and the hot water HM1 is supplied to the circulation path 536. Circulate.

  The primary heat exchanger 540 is a first heat exchange means that mainly exchanges sensible heat from the combustion exhaust of the burner 552 installed as an example of the fuel gas combustion means to the hot water HM1. The secondary heat exchanger 542 is a second heat exchanging means for exchanging mainly latent heat from the combustion exhaust of the burner 552 to the hot water HM1, and is used for preheating the hot water HM1. A temperature sensor 554 is installed in the outlet side circulation path 536 of the primary heat exchanger 540, and a temperature sensor 556 is installed in the outlet side circulation path 536 of the secondary heat exchanger 542, and these detected temperatures T 5 and T 6 are burner 552. Used for combustion control.

  A low temperature heating circuit 558, a high temperature heating circuit 560, a hot water supply circuit 562, and a memory circuit 564 are connected to the circulation path 536 as means for using the heat of the hot water HM1.

  The low temperature heating circuit 558 branches from the outlet side of the secondary heat exchanger 542 and the inlet side of the hot water storage tank switching valve 544 in the circulation path 536, and is a pipe line for circulating the low temperature side hot water HM1 to the low temperature heater 566. . The low-temperature heater 566 is an example of the first heat radiation load or the first heat radiation means of the hot water HM1, and is, for example, a floor heater.

  The high temperature heating circuit 560 is a pipe that branches off from the outlet side of the primary heat exchanger 540 and the inlet side of the hot water storage tank switching valve 544 and circulates the hot water HM1 on the high temperature side through the high temperature heater 568. The high temperature heater 568 is an example of the second heat radiation load or the second heat radiation means of the hot water HM1, and is, for example, a hot air heater.

  The hot water supply circuit 562 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 570, the secondary heat exchanger 572, and the bypass passage 574 Is provided.

  The hot water supply heat exchanger 570 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 570, for example, a plate heat exchanger is used. In this hot water supply heat exchanger 570, a water pressure acts on the water supply side. The hot water supply heat exchanger 570 is installed in a circulation path 536A branched to the circulation path 536 via a high temperature distribution valve 576, and the hot water HM1 circulates through the circulation path 536A. When water leakage due to perforation occurs in the hot water heat exchanger 570, the water pressure overcomes the pressure of the hot water HM1, and the water enters the hot water HM1 side, raising the water level of the hot water storage tank 4. .

  The secondary heat exchanger 572 is means for exchanging mainly latent heat from the combustion exhaust of the burner 552 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 570 to exchange heat of the hot water HM1 to obtain high-temperature hot water HW. The bypass passage 574 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 578 is installed on the inlet side of the hot water W of the hot water supply circuit 562, and a temperature sensor 580 is installed on the outlet side of the hot water HW. The detected temperatures T7, T8, etc. are used to control the combustion of the burner 552 as a control of the outlet temperature. It is used to control the mixing ratio with the water supply W to the bypass 574 side.

  The memorial circuit 564 is an example of means for exchanging heat of the hot water HM1 to the bathtub water BW in the bathtub 582 and raising the temperature of the bathtub water BW to a temperature suitable for bathing. This remedy circuit 564 includes a remedy heat exchanger 584 and a remedy pump 586. The memorial heat exchanger 584 is an example of heat exchange means for exchanging heat of the hot water HM1 to the bath water BW, and is installed in a circulation path 536B branched to the circulation path 536 via a high-temperature distribution valve 576. The warm water HM1 circulates through the circulation path 536B. The memorial pump 586 is a means for circulating the bathtub water BW from the bathtub 582 to the bathtub 582 through the memorial heat exchanger 584 during memorial service. A temperature sensor 588 is installed on the exit side of the bathtub 582 of the memorial circuit 564, and the detected temperature T9 is used for memorial control.

  A pouring circuit 590 is connected between the chasing circuit 564 and the hot water supply circuit 562. The pouring circuit 590 connects the hot water supplying circuit 562 and the chasing circuit 564 via the pouring electromagnetic valve 592. Yes. The pouring solenoid valve 592 is an example of means for insulating the water W side and the bath water BW.

  These detected temperatures T1 to T9 and Tout are taken into the control device 22 as control information. The driving of the heat collecting pump 14, the circulation pump 18, and the memory pump 586 and the combustion of the burner 552 are controlled by the driving output of the control device 22.

  Next, FIG.16 and FIG.17 is referred about heat source control. 16 and 17 show an example of the flow rate control processing procedure. The processing procedure shown in FIGS. 16 and 17 is an example, and the present invention is not limited to such processing. In FIG.16 and FIG.17, a, b, and c have shown the connector between flowcharts.

  This processing procedure is an example of the heat source control method or the heat source control program of the present invention. In the processing procedure shown in FIG. 16, when the heating / hot water supply / remembrance device 502 is connected to a power source, “ON” of the power source is detected (step S101), and a pre-check (preliminary check) for circuit abnormality is performed (step S102). . In the pre-check, the heat collection circuit leakage abnormality, temperature sensor open or short, heat collection number electrode abnormality, heat collection switching valve abnormality, electrical circuit board abnormality are confirmed, and if these are abnormal (NO in step S102), these An alarm corresponding to the abnormality is generated (step S103), and the power supply is disconnected to enter the “off” state (step S104). After the cause is removed by the generation of the alarm, the heating / hot water supply / remembrance device 502 is reconnected to the power source.

  If there is no abnormality in the pre-check (YES in step S102), the hot water storage tank 4 side of the heat collecting switching valve 332 is closed (step S105), the space between the bypass passage 334 and the solar heat exchanger 12 is opened. The hot water HM <b> 2 that has passed through the heat collection panel 10 forms a circuit that does not pass through the solar heat exchanger 12. It is determined whether the time setting of the remote control device 342 has ended (step S106). If the time setting has not ended (NO in step S106), the determination of the time setting is repeated and the time setting has been set. If (YES in step S106), it is determined whether the heat collection switching valve 332 is in the circulation position or the standby position (step S107). The heat collection switching valve 332 opens between the bypass path 334 and closes the solar heat exchanger 12 and circulates the hot water HM2 via the bypass 334, and the bypass path 334. The solar heat exchanger 12 is opened by closing the space between the standby position that opens and the solar heat exchanger 12 and the bypass 334 and the solar heat exchanger 12. There is a heat exchange position through which the hot water HM1 is exchanged. If it is not the circulation position or the standby position but is in the heat exchange position (NO in step S107), it is determined whether or not it is after the heat collection operation end time (for example, 19:00) (step S108), and the heat collection operation is completed. If it is after the time (YES in step S108), the heat collecting pump 14 is turned off and stopped (step S109), the hot water storage tank 4 side of the heat collecting switching valve 332 is closed (step S110), and the heat collecting switching valve 332 is closed. Return to the position confirmation (step S107).

  If it is a circulation position or a standby position (YES in step S107), it is determined whether the current time is within the heat collection operation start time range (for example, 7:00 to 17:00) (step S111). If there is (YES in step S111), it is determined whether the detected temperature T3 in the vicinity of the outlet side of the hot water storage tank 4 is equal to or lower than Tmax (T3 ≦ Tmax) (step S112). The hot water storage tank 4 side of the heat switching valve 332 is closed (step S113), and the heat collecting pump 14 is turned on to operate (step S114). The operation of the heat collecting pump is monitored to determine whether the rotational speed of the heat collecting pump is normal (step S115). Since the rotation speed is determined after the heat collection pump 14 is started, the rotation speed is determined after 120 seconds, for example. For example, if the rotation speed is not 500 [rpm] or more (NO in step S115), the heat collecting pump 14 is turned off and stopped (step S116), and an alarm is generated as a heat collecting pump rotation abnormality (step S116). S117), the power is turned off (step S104).

  If the rotation of the heat collecting pump 14 is, for example, 500 [rpm] or more (YES in step S115), for example, after a lapse of 180 [seconds] as a predetermined time (step S118), the temperature T1 is 3 [° C.] from the temperature T3. If the temperature T1 is not high (NO in step S119), it is determined that there is no temperature difference for heating the hot water HM1 between the hot water HM2 and the hot water HM1. The boiling prevention operation is determined (step S120). If the temperature T1 is high (YES in step S119), it is determined whether the temperature T3 is equal to or lower than Tmax. If the temperature T3 is equal to or lower than Tmax (YES in step S121), the heat collecting switching valve 332 is switched to the heat exchanger side, and the flow of the hot water HM2 is changed from the flow circulating in the bypass passage 334 to the heat collecting switching valve 332. The hot water storage tank 4 side is opened (step S122).

  A heat collecting lamp indicating that heat is being collected is turned on (step S123), and the heat collecting pump 14 is variably controlled (step S124). The variable control includes an operation of changing the average rotation speed by intermittently operating the heat collection pump 14 in addition to changing the rotation speed of the heat collection pump 14 under a continuous operation state. Such a change is performed using the flow rate table 360 (FIG. 10) and the operation ratio table 50 (FIG. 2). Since the changing operation is the same as that of the fourth embodiment, the description thereof is omitted.

  The variable control (step S124) of the heat collecting pump 14 is in the intermittent operation state at the rotational speed level 0 if the rotational speed level is other than 0 and the heat collecting pump 14 is in continuous operation (NO in step S125). If the temperature T1 is not lower by 2 [° C.] or more than the temperature T3 (NO in step S126), the variable control of the heat collecting pump 14 is repeated. If the rotational speed level is 0 (YES in step S125), if the temperature T1 is 2 [° C.] or more lower than the temperature T3 (YES in step S126), it is more energy efficient to stop the heat collecting pump 14 than to collect heat. The hot water storage tank 4 side of the heat collecting switching valve 332 is closed (step S127), the heat collecting pump is stopped (step S128), and the heat collecting lamp is turned off (step S129). The stop period of the heat collecting pump is an interval for periodically confirming whether the external environment has recovered to a state where heat can be collected due to weather recovery or the like, and is set to, for example, 15 minutes as a waiting time. By setting the stop period in this manner and starting the position confirmation of the heat collection switching valve 332 (step S107) after the period has elapsed, if the heat collection environment is improved due to weather recovery or the like, the heat collection can be resumed. Can be possible.

  If the current time is not within the start time range of the heat collection operation (NO in step S111), and if T3 is not less than Tmax, that is, if Tmax is exceeded (NO in step S112 and NO in step S121), the heat collection is performed. Returning to the position confirmation of the switching valve 332 (step S107), the determination is repeated until the time and temperature conditions of T3 are obtained. Thereby, efficient heat collection can be performed.

  In the boiling prevention operation determination (step S120), if the temperature T1 is higher than the boiling prevention operation reference value (YES in step S120), it is determined that the boiling prevention operation needs to be performed, and the heat collecting switching valve 332 is operated. The hot water storage tank 4 side is closed (step S130). Since the hot water HM2 circulates via the bypass 334, the hot water HM2 does not stay in the heat collection panel 10, and the boiling of the hot water HM2 can be prevented. Further, since the hot water HM2 does not pass through the solar heat exchanger 12, it is possible to prevent the hot water HM1 from overheating to, for example, 80 [° C.] or higher as Tmax.

  If the temperature T1 is lower than the boiling prevention operation reference value (NO in step S120), it is determined that it is not necessary to perform the boiling prevention operation, the heat collecting pump 14 is turned off and stopped (step S131), and the specified time After elapse (YES in step S132), position confirmation of the heat collection switching valve 332 (step S107) is started. If the temperature T1 is less than T3 + 3 [° C.], the heat collecting pump 14 is stopped, so that energy consumption due to circulation of the hot water HM2 can be suppressed.

[Sixth Embodiment]

  Instead of the header system, the heat collection panel 10 described above may be a 1-pass system heat collection panel. Therefore, in the sixth embodiment, a one-pass heat collection panel is disclosed. The heat collection panel will be described with reference to FIG. FIG. 18 shows a one-pass heat collecting panel.

  As shown in FIGS. 18A, 18B, and 18C, the heat collecting panel 602 includes a rectangular flat plate-shaped casing portion 603. Also in this embodiment, as shown in FIG. 18A, a part of the protective cover 604 is omitted, and the inside of the housing portion 603 is exposed. A single meandering pipe 606 meandering in order to maximize the amount of heat received in the surface of the casing part 503 is disposed inside the casing part 603, and the hot water HM2 is supplied to one end 608 (intake port) of the meandering pipe 606. ) And is taken out from the other end 610 (outlet).

  In the heat collecting panel 602, the heat receiving fluid passes through the inside of one meandering pipe, and therefore the time required for the heat receiving fluid to pass through the heat collecting panel is substantially constant. Variation in temperature of the heat receiving fluid taken out can be suppressed.

  Moreover, although the said embodiment demonstrated with the heat collecting panel of 1 sheet, you may use the heat collecting panel which has arrange | positioned the several heat collecting panel in series, or arranged in parallel. By increasing the size of the heat collecting panel, the amount of solar energy collected can be increased.

[Experimental example]

  For experimental examples, refer to FIGS. 19 and 20. FIG. 19 shows the heat collection efficiency on each measurement day, and FIG. 20 shows the relationship between the amount of solar radiation and the heat collection efficiency ratio.

In FIG. 19, the horizontal axis represents the measurement date when the heat collection efficiency was measured, and the vertical axis represents the heat collection efficiency [%]. Therefore, when obtaining the heat collection efficiency of this embodiment,
Heat collection efficiency = Daily heat collection ÷ Daily solar radiation x 100 [%] (4)
Can be expressed as

In FIG. 20, the horizontal axis represents the heat collection efficiency measurement date, the left vertical axis represents the heat collection efficiency ratio [%], and the right vertical axis represents the amount of solar radiation [MJ / day]. ing. Therefore, the heat collection efficiency ratio is a ratio when the heat collection efficiency when collecting heat without intermittent operation is 100%. When not operating intermittently, the heat collection efficiency ratio is 100% on each measurement day, and the heat collection efficiency ratio is
Heat collection efficiency ratio = heat collection efficiency ÷ heat collection efficiency without intermittent operation x 100 [%] (5)
It becomes.

  As an example, when the period from August 12 to September 8 is set as the measurement date and compared with the case of collecting heat by continuous operation without performing intermittent operation, as shown in FIG. It was confirmed that the heat collection efficiency higher than the case where intermittent operation was not performed or the heat collection efficiency equivalent to the case where intermittent operation was not performed was obtained.

  In the solar radiation efficiency ratio shown in FIG. 20, a heat collection efficiency ratio of 115% or more can be obtained on August 12, August 15 and September 8 when the solar radiation amount is in the range of 50 to 60%. On September 8th, it was confirmed that the heat collection efficiency was 5 times or more that when intermittent operation was not performed. Even in an environment where the amount of solar radiation is small and sufficient heat collection cannot be obtained by continuously operating the heat collection pump, heat is collected by intermittent operation of the heat collection pump, and the heat collection efficiency is improved.

[Other Embodiments]

  (1) In the first to third embodiments, the heat collecting pump 14 is controlled based on the detected temperature of the hot water HM2. For example, flow rate information of the hot water HM2 can be added as control information. For example, if the flow rate of the hot water HM2 is greater than the minimum flow rate or a value close thereto, that is, if the heat collecting pump 14 rotates at a speed higher than the minimum rotation number or a value close thereto, control is performed to reduce the rotation speed, You may make it switch to an intermittent state, when the flow volume of warm water HM2 is the minimum flow volume or its vicinity value. By controlling in this way, the change in the flow rate of the hot water HM2 can be controlled stepwise.

  (2) In the first embodiment, the fixed value is set as a target value of the tapping temperature, for example, less than 35 [° C.], but is not limited thereto. The fixed value may be a numerical value other than 35 [° C.], or may be a variable such as increasing or decreasing the numerical value according to the elapsed time or time information from the start of heat exchange.

  (3) In the second embodiment, the detected temperatures T1 and T2 and the flow rate L1 of the hot water HM2 are used to monitor the heat applied to the heat collection panel 10, but the present invention is not limited to this. For example, it is also possible to arrange a solar radiation sensor in the vicinity of the heat collection panel 10 and take the amount of solar radiation detected by the solar radiation sensor into the control device 22 and determine the heat applied to the heat collection panel 10 based on the amount of solar radiation. is there. If a solar radiation sensor is used, it is not necessary for the control device 22 to calculate the detected temperatures T1 and T2 and the flow rate of the hot water HM2. Further, if the amount of heat is obtained from the detected temperatures T1 and T2 and the flow rate of the hot water HM2, the amount of heat by sunlight is obtained, so that it is not necessary to arrange a solar radiation sensor.

(4) In the second embodiment, the detected temperatures T1 and T2 and the flow rate L1 of the hot water HM2 are used to monitor the heat applied to the heat collection panel 10, but the present invention is not limited to this. For example, when the rotation of the heat collection pump 14 is fixed at a low rotation speed or when the heat applied when the rotation speed is low is monitored, the rotation of the heat collection pump 14 is constant and the temperature difference ΔT ₁₂ is added. It will be proportional or nearly proportional to the amount of heat. In this case, since the heat applied to the heat collecting panel 10 can be monitored using the detected temperatures T1 and T2, the processing load on the control device 22 can be reduced.

  (5) In the above embodiment, solar heat is used as heat applied from the outside, but the present invention is not limited to this. For example, it may be used as heat applied from the outside of a heat source using combustion heat or exhaust heat.

  (6) In the above embodiment, the stop time (dwell time) and the operation time (operation time) in the intermittent operation are set as one set value, but the present invention is not limited to this. For example, the operation time of the heat collection pump 14 may be set to a time for the hot water HM2 on the inlet side of the heat collection panel 10 to reach the outlet side. In addition, for example, a plurality of stop times may be set and the stop times may be changed according to the amount of heat applied from the outside. Moreover, you may make it change a stop time according to the calorie | heat amount applied from the outside by setting several operation time. If a plurality of stop times or operation times are set, a plurality of different average rotation speeds can be set.

  (7) When a predetermined amount of heat cannot be obtained, the heat collecting switching valve may be switched to circulate the bypass to store heat, and the temperature of the hot water may be raised before being sent to the solar heat exchanger 12.

  (8) In the first embodiment, the second embodiment, and the third embodiment, the operation ratio table is set in the ROM to control the heat collecting pump, but this will be described in the fourth embodiment. As described above, the flow rate table may be set and control for changing the rotation speed of the heat collecting pump stepwise may be performed, and the time table may be set to determine the operation disclosure time and the operation end time. Moreover, you may comprise so that it may circulate through a bypass path according to heat collection environment by arrange | positioning a heat collection switching valve and a bypass path. The configuration, control, and operation described in the fourth embodiment are within a range that is consistent with the configuration, control, and operation described in the first, second, and third embodiments. Of course, the present invention can be applied to the first embodiment, the second embodiment, and the third embodiment.

  (9) In the first embodiment (FIG. 1), the second embodiment (FIG. 4), and the third embodiment (FIG. 6), the bypass path is not clearly shown in the heat collecting circuit. Similarly to the fourth embodiment (FIG. 8), a bypass path may be formed to perform bypass control of hot water.

  (10) In the above embodiment, the flow rate of the hot water HM2 that is the heat receiving fluid is monitored by the number of rotations of the heat collecting pump 14, but the flow rate sensor is installed to detect the flow rate, and the flow rate is monitored by the detection signal. It is good also as composition which carries out.

  (11) Regarding the intermittent control of the heat collecting pump 14, the ratio between the operation time and the stop time and the intermittent pattern of the operation and the stop can be arbitrarily set, and are not limited to the above embodiment.

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 a form for carrying out the invention. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist of the invention disclosed in the above, and such modifications and changes are included in the scope of the present invention.

The present invention can be applied to a heat source device or the like that efficiently uses external heat such as solar heat, and is useful because it can improve heat exchange efficiency and can be widely applied to heat utilization.

2 Heat source device 4 Hot water storage tank 6 Circulation path 8, 108, 208, 308, 508 Solar heat collection circuit 10 Heat collection panel 14 Heat collection pump 16, 116, 316, 317, 544, 546, 556, 588 Temperature sensor 18 Circulation pump 332 Heat collection switching valve 334 Bypass path

Claims (15)

Heat exchange means for exchanging heat applied from the outside to the heat receiving fluid;
Heat storage means for storing heat by a heat medium in which heat of the heat receiving fluid is heat-exchanged;
First temperature detection means for detecting an outlet temperature of the heat receiving fluid flowing through the heat exchange means;
Second temperature detection means for detecting the temperature of the heat medium of the heat storage means;
A pump for flowing the heat-receiving fluid through the heat exchange means;
The temperature difference between the outlet temperature and the temperature of the heating medium is monitored every predetermined time. When the temperature difference falls below a predetermined temperature, the pump speed is reduced, and the pump speed is the minimum speed. When the temperature difference is below the predetermined temperature even when the temperature reaches the control unit, the pump is intermittently operated at the minimum rotational speed, and the flow rate of the heat receiving fluid is controlled to be intermittent.
A heat source device comprising: And third temperature detecting means for detecting an inlet side temperature of the heat receiving fluid flowing through the heat exchanging means,
When the difference between the outlet temperature and the temperature of the heating medium is lower than a reference temperature lower than the predetermined temperature, the control unit stores the inlet temperature and compares it with the outlet temperature, 2. The heat source device according to claim 1, wherein the rotation speed of the pump is controlled when the outlet temperature is higher than the stored inlet temperature. Heat exchange means for exchanging heat applied from the outside to the heat receiving fluid;
Outlet side temperature detecting means for detecting the outlet side temperature of the heat receiving fluid flowing through the heat exchange means;
An inlet side temperature detecting means for detecting an inlet side temperature of the heat receiving fluid flowing through the heat exchange means;
Decreases with monitoring the flow rate of temperature difference and the heat receiving fluid and the delivery temperature and the entering-side temperature, determine the amount of heat applied to the heat exchange means from said difference temperature and the flow rate, the amount of heat than a predetermined value A controller that controls the flow rate of the heat receiving fluid in an intermittent state;
A heat source device comprising: Heat exchange means for exchanging heat applied from the outside to the heat receiving fluid;
Temperature detecting means for detecting the inlet temperature of the heat receiving fluid flowing through the heat exchanging means;
A pump for flowing the heat-receiving fluid through the heat exchange means;
When the inlet side temperature is below a predetermined temperature, a control unit that controls the pump to intermittent operation;
A heat source device comprising: Heat exchange means for exchanging heat applied from the outside to the heat receiving fluid;
Heat storage means for storing heat by a heat medium in which heat of the heat receiving fluid is heat-exchanged;
First temperature detection means for detecting an outlet temperature of the heat receiving fluid that exits from the heat exchange means;
Second temperature detection means for detecting the temperature of the heat medium of the heat storage means;
Third temperature detecting means for detecting the inlet temperature of the heat receiving fluid flowing through the heat exchanging means;
A pump for flowing the heat-receiving fluid through the heat exchange means;
It said first temperature detecting means, the detected temperature is monitored by the second temperature detecting means and a third temperature detecting means, the delivery temperature and the detected temperature difference and the Ri der below a predetermined temperature of the heating medium When the outlet side temperature is higher than the inlet side temperature , the controller intermittently operates the pump at a low rotation speed, and controls the average flow rate of the heat receiving fluid flowing through the heat exchange means to be less than the minimum flow rate due to continuous rotation of the pump. When,
A heat source device comprising: A step of exchanging heat applied from the outside to the heat receiving fluid by a heat exchanging means;
Storing the heat of the heat receiving fluid with a heat exchanged heat medium; and
Detecting the outlet temperature of the heat receiving fluid exiting from the heat exchanging means by first temperature detecting means;
Detecting a temperature of the heat medium of the heat storage means by a second temperature detection means;
Flowing the heat receiving fluid to the heat exchanging means by a pump;
The temperature difference between the outlet temperature and the temperature of the heating medium is monitored every predetermined time. When the temperature difference falls below a predetermined temperature, the pump speed is reduced, and the pump speed is the minimum speed. When the temperature difference is less than the predetermined temperature even when the pressure reaches the pump, the pump is intermittently operated at the minimum number of revolutions, and the flow of the heat receiving fluid is controlled in an intermittent state;
A heat source control method comprising: A step of detecting, by a third temperature detecting means, an inlet side temperature of the heat receiving fluid flowing through the heat exchanging means;
When the temperature difference between the outlet temperature and the temperature of the heating medium is lower than a reference temperature lower than the predetermined temperature, the inlet temperature is stored and compared with the outlet temperature. Controlling the number of revolutions of the pump if the outlet side temperature is higher than the entry side temperature;
The heat source control method according to claim 6, comprising: A step of exchanging heat applied from the outside to the heat receiving fluid by a heat exchanging means;
Detecting an outlet side temperature of the heat receiving fluid flowing in the heat exchange means;
Detecting an inlet side temperature of the heat receiving fluid flowing in the heat exchange means;
Decreases with monitoring the flow rate of temperature difference and the heat receiving fluid and the delivery temperature and the entering-side temperature, determine the amount of heat applied to the heat exchange means from said difference temperature and the flow rate, the amount of heat than a predetermined value A step of controlling the flow of the heat receiving fluid in an intermittent state;
A heat source control method comprising: A step of exchanging heat applied from the outside to the heat receiving fluid by a heat exchanging means;
Detecting an inlet side temperature of the heat receiving fluid flowing in the heat exchange means;
Flowing the heat receiving fluid to the heat exchanging means by a pump;
When the inlet side temperature is equal to or lower than a predetermined temperature, the step of controlling the pump to intermittent operation;
A heat source control method comprising: A step of exchanging heat applied from the outside to the heat receiving fluid by a heat exchanging means;
Storing the heat of the heat receiving fluid with a heat exchanged heat medium; and
Detecting the outlet temperature of the heat receiving fluid exiting from the heat exchanging means by first temperature detecting means;
Detecting a temperature of the heat medium of the heat storage means by a second temperature detection means;
Detecting the incoming temperature of the heat receiving fluid flowing in the heat exchange means by a third temperature detecting means;
Flowing the heat receiving fluid to the heat exchanging means by a pump;
It said first temperature detecting means, the detected temperature is monitored by the second temperature detecting means and a third temperature detecting means, the delivery temperature and the detected temperature difference and the Ri der below a predetermined temperature of the heating medium When the outlet side temperature is higher than the inlet side temperature , the pump is intermittently operated at a low rotational speed, and the average flow rate of the heat receiving fluid flowing through the heat exchange means is controlled to be less than the minimum flow rate due to continuous rotation of the pump; ,
A heat source control method comprising: In the computer mounted on the heat source device,
A heat exchange means for exchanging heat applied from the outside to the heat receiving fluid ;
A function of executing a process of storing heat in the heat medium in which heat of the heat receiving fluid is heat-exchanged;
A function of taking in the detected temperature information of the first temperature detecting means for detecting the outlet temperature of the heat receiving fluid coming out of the heat exchanging means;
A function of taking in the detected temperature information of the second temperature detecting means for detecting the temperature of the heat medium of the heat storage means;
A function of operating a pump for flowing the heat-receiving fluid to the heat exchanging means;
The temperature difference between the outlet temperature and the temperature of the heating medium is monitored every predetermined time. When the temperature difference falls below a predetermined temperature, the pump speed is reduced, and the pump speed is the minimum speed. When the temperature difference is below the predetermined temperature even when reaching the above, the pump is intermittently operated at the minimum number of rotations, and the flow of the heat receiving fluid is controlled in an intermittent state;
A heat source control program characterized in that is executed. And a function of taking in the detected temperature information of the third temperature detecting means for detecting the incoming temperature of the heat receiving fluid flowing in the heat exchanging means,
When the temperature difference between the outlet temperature and the temperature of the heating medium is lower than a reference temperature lower than the predetermined temperature, the inlet temperature is stored and compared with the outlet temperature. A function of controlling the rotation speed of the pump if the outlet side temperature is higher than the entry side temperature;
The heat source control program according to claim 11, wherein: In the computer mounted on the heat source device,
A heat exchange means for exchanging heat applied from the outside to the heat receiving fluid ;
A function to detect and take in the outlet temperature of the heat receiving fluid flowing into the heat exchange means;
A function of detecting and taking in an inlet side temperature of the heat receiving fluid flowing into the heat exchange means;
Decreases with monitoring the flow rate of temperature difference and the heat receiving fluid and the delivery temperature and the entering-side temperature, determine the amount of heat applied to the heat exchange means from said difference temperature and the flow rate, the amount of heat than a predetermined value A function of controlling the flow of the heat receiving fluid in an intermittent state;
A heat source control program characterized in that is executed. In the computer mounted on the heat source device,
A function of capturing detection information of the inlet side temperature of the heat receiving fluid flowing in the heat exchanging means for exchanging heat applied from the outside to the heat receiving fluid;
A function of operating a pump for flowing the heat-receiving fluid to the heat exchanging means;
If the entry side temperature is a predetermined temperature or less, the function of controlling the pump in intermittent operation,
A heat source control program characterized in that is executed. In the computer mounted on the heat source device,
A heat exchange means for exchanging heat applied from the outside to the heat receiving fluid;
A function of executing a process of storing heat in the heat medium in which heat of the heat receiving fluid is heat-exchanged;
A function of taking in the detected temperature information of the first temperature detecting means for detecting the outlet temperature of the heat receiving fluid coming out of the heat exchanging means;
A function of taking in the detected temperature information of the second temperature detecting means for detecting the temperature of the heat medium of the heat storage means;
A function of capturing detected temperature information of a third temperature detecting means for detecting an inlet side temperature of the heat receiving fluid flowing in the heat exchanging means;
A function of operating a pump for flowing the heat-receiving fluid to the heat exchanging means;
The detected temperature information obtained from the first temperature detecting means , the second temperature detecting means, and the third temperature detecting means is monitored, and a difference between the outlet temperature and the detected temperature of the heating medium is not more than a predetermined temperature. If Ah Ri and the delivery temperature is higher than the entering-side temperature, the pump is intermittently operated at a low rotational speed, the average flow rate of said heat-receiving fluid flowing in said heat exchange means to less than the minimum flow rate by the continuous rotation of the pump Functions to control,
A heat source control program characterized in that is executed.

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