JP2002286231A - Hot-water supply space-heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot-water supply space-heating system, in which irritation caused by a start-up delay of space heating can be dissolved, while efficiently diverting the hot water to the space heating. SOLUTION: A heat exchanger 60 is housed above a hot water storage tank 10 in this system S. Either one of the heat exchanger 60 and the heat pump 30 (a heat source device) is selectively connected to a floor heating panel 20 (a space heater) by selection of a valve 45. If a timer for a space-heating start-up is not preset by a setting part 22b (a setting means) of a control panel 22, heating medium is circulated between the heat exchanger 60 and the heating panel 20 for a rapid start-up in reply to the operation of a switch 22a. Thereafter, the heating medium is circulated between the heat pump 30 and the panel 20 to maintain a comfortable heating condition. If the timer for the space- heating start-up has been preset, the heating medium is circulated between the heat pump 30 and the panel 20 from the start-up of the heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system combining hot water supply and heating such as floor heating.

[0002]

2. Description of the Related Art Conventionally, hot water supply and floor heating have a system configuration independent of each other. That is, in the hot water supply system, the water stored in the hot water storage tank is heated by an electric heater (dedicated heat source) and supplied to the hot water supply. In floor heating systems, heat pumps (heat sources) and floor heating panels (heaters)
A heat medium is circulated between the heat pump and the heat medium, and the heat medium receives heat from the heat pump and radiates heat to the floor heating panel.

[0003]

However, it takes a long time until the floor reaches a desired warming (rise of heating), and the user may feel uncomfortable. Then, the inventor devised to divert the heat of the hot water of the hot water supply system to start up the heating. However, if it is diverted too much, it will hinder the hot water supply. On the other hand, the floor heating system is provided with a timer function for making a reservation setting of the heating start time, and when using this function, it is sufficient to take into account the rise time and start using the room to be heated. It is customary to set the timer so that it is warm. Therefore, it can be considered that the problem of the delay of the rise is when the timer is not set. The present invention has been made in view of the above circumstances, and it is an object of the present invention to eliminate the discomfort due to the slow start of heating while efficiently diverting the heat of hot water of a hot water supply system. .

[0004]

Means for Solving the Problems The present invention has been proposed to solve the above problems, and a hot water supply / heating system according to a first aspect of the present invention includes a heat source unit for applying heat to a heat medium,
A hot water tank for storing water to be heated by heat exchange with the heat medium or by a dedicated heat source separate from the heat source device, and stored in an upper portion of the hot water tank to receive heat from the water to the heat medium A heat exchanger to pass, a heater that is selectively connected to one of the heat source device or the heat exchanger, and the heat medium is circulated between the one, and receives heat from the heat medium, The control device includes a setting unit for setting a heating start time and a control unit. The control means executes a first heating mode in which the heat medium is circulated between the heat exchanger and the heater in accordance with an operation instruction of the heater when the timing is not set. To start heating, and then circulate the heat medium between the heat source device and the heater.
Execute the heating mode. On the other hand, if the above-described time setting has been made, the second heating mode is executed from the beginning of heating up after the set time.

[0005] In a system according to a second aspect of the present invention,
The apparatus further includes temperature detecting means for detecting the temperature of the heater or the temperature of the heat medium around the heater, and water temperature detecting means for detecting the temperature of water in the hot water storage tank. The control means, when the time setting has not been made, estimates the amount of heat required for heating up based on the detection value of the temperature detection means before the operation instruction of the heater, and the water temperature detection means Estimating the amount of heat that can be supplied from the hot water tank to the heater through the heat exchanger based on the detected value of the hot water tank, and driving the heat source device so that the amount of heat that can be supplied exceeds the required amount of heat. The water in the hot water storage tank is heated by causing heat exchange from the heat medium to water or by driving the dedicated heat source.

A third feature of the present invention is that the water in the hot water storage tank is heated by heat exchange with the heat medium heated by the heat source unit (that is, the hot water storage and the heating are shared. In the configuration in which the heat source is performed by the heat source, the control means sets the time, and furthermore, when the heat source is driven to heat the water in the hot water tank, The output of the heat source device is adjusted based on the detected value of the water temperature detecting means and the set time so that the water temperature of the hot water storage tank reaches the target value by the set time.

According to a fourth feature of the present invention, in the third feature, when the set time has come before the water temperature of the hot water storage tank has reached a target value as a result of the output adjustment, the control means is provided. Does not execute the second heating mode from the beginning of heating up after the set time, but initially executes the first heating mode.
The heating mode is executed, and the heating of the water in the hot water storage tank by the heat source device is continued. After the water temperature reaches the target value, the mode is switched to the second heating mode.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hot water supply / room heating system S for a house according to a first embodiment of the present invention. The hot water supply / heating system S includes a hot water tank 10 installed outdoors.
And a floor heating panel 20 (heater) laid on the floor.

A water supply pipe 18 is connected to the lower end of the hot water storage tank 10. The hot water tank 10 is filled with water supplied from the water supply pipe 18. In the hot water storage tank 10, two (plural) sheathed heaters 11 and 12 (exclusive heat sources separate from the heat source devices) are housed vertically apart. Sheath heater 1
1 is a heat exchanger 6 described later in the upper part of the hot water storage tank 10.
0 is arranged near the lower side. The sheathed heater 12 is arranged near the lower end of the hot water storage tank 10. By means of these sheathed heaters 11 and 12, the water in the upper part of the hot water storage tank 10 is turned into hot water of about 90 ° C., for example. This hot water is
Hot water is supplied through hot water supply pipe 19 extending from the upper end of hot water storage tank 10.

A radiating pipe 21 is provided inside the floor heating panel 20. The floor heating panel 20 is connected to an operation panel 22 having an on / off switch 22a and a setting unit 22b (setting unit) for timer-reserving a heating start time. Operation information of the operation panel 22 is sent to a controller 50 described later by wire. Although not shown, the floor heating panel 20 includes:
A remote control panel having the same functions as the control panel 22 and wirelessly transmitting operation information to the controller 50 is also provided.

[0011] A heat pump 30 is connected to the floor heating panel 20 as a heat source. Heat pump 30
Are designed to repeat evaporation and condensation while circulating a refrigerant. The refrigerant takes heat from the outside air when evaporating, and radiates heat to the heat receiving tube 31 in the heat pump 30 when condensing. Both ends of the heat receiving pipe 31 are connected to both ends of the heat radiating pipe 21 of the floor heating panel 20 via the heat medium passages 41 and 42. The heat medium circulation pump 40 is provided in the passage 41. By driving the pump 40, the heat medium is supplied to the heat receiving tube 3
1, the passage 41, the radiator tube 21, and the passage 42 are circulated in this order, and radiate heat to the floor heating panel 20 while passing through the radiator tube 21. As the heat medium, for example, an ethylene glycol aqueous solution or the like is used.

Further, the floor heating panel 20 can use the hot water in the hot water storage tank 10 as a heat source. That is, a heat exchanger 60 formed of a heat transfer tube is accommodated in the upper part of the hot water storage tank 10. Heat medium passages 43 and 44 are connected to both ends of the heat exchanger 60. Heat medium passage 4
Numeral 3 is connected to a passage 41 upstream of the heat medium circulation pump 40 via an electromagnetic three-way valve 45 (flow path switching means).
With the electromagnetic three-way valve 45 as a boundary, the passage 41 is divided into a passage portion 41a on the heat pump 30 side and a passage portion 41b on the floor heating panel 20 side. The heat medium passage 44 is connected to the passage 42. At this connection, the passage 42
Are divided into a passage portion 42a on the floor heating panel 20 side and a passage portion 42b on the heat pump 30 side.

For example, when the solenoid is on, the electromagnetic three-way valve 45 shuts off the passage 43 and opens the passage portions 41a, 4a.
1b communicate with each other. Thereby, the above-mentioned circulation circuit between the heat pump 30 and the floor heating panel 20 is configured. The electromagnetic three-way valve 45 shuts off the passage 41a when the solenoid is off, and connects the passage 43 to the passage 41b. As a result, the heat exchanger 60, the passage 43, and the passage 4
1b, a radiator pipe 21, a passage portion 42a, and a circulation circuit of a heat medium sequentially passing through the passage 44 are configured. At this time, the heat medium receives heat from the hot water in the hot water storage tank 10 while passing through the heat exchanger 60, and receives heat from the floor heating panel 2 while passing through the radiator pipe 21.
The heat will be radiated to zero.

Further, the hot water supply / room heating system S is provided with a controller 50 (control means) and temperature sensors 51 and 52. The water temperature sensor 51 (water temperature detecting means)
A plurality (only two are shown in the figure) of the hot water storage tank 10 are vertically separated from each other. With these water temperature sensors 51,
The water temperature distribution in the hot water storage tank 10 and, consequently, the amount of water existing as hot water are detected. Floor temperature sensor 52 (temperature detecting means)
Detects the surface temperature of the floor heating panel 20. The sensor 52 may be configured to detect the temperature of the heat medium in the radiator tube 21, the passage 42a, and the like.

The controller 50 includes these sensors 51,
The heat pump 30, the heat medium circulating pump 40, the electromagnetic three-way valves 45, the sheathed heaters 11, 12 and the like are operated based on the temperature detected by the control panel 52 and operation information from the operation panel 22 or the remote control device, etc. Execute control. Hereinafter, the flow of this control will be described with reference to the flowchart of FIG.

First, a case where a timer reservation of a heating start time is set by the operation panel 22 (or the remote control operation panel) (step 100 → step 110) will be described. The controller 50 receiving this setting information,
It is monitored by a built-in timer whether the set time has come (step 110). Then, when the set time has come, the heating operation in the second heating mode is started (step 120). In this mode, the passage portions 41a and 41b are communicated with each other by the electromagnetic three-way valve 45, and the heat medium circulation pump 40 and the heat pump 30 are driven. As a result, the heat medium is transferred to the heat receiving tube 31, the passage 41, and the heat radiating tube 2.
1. Heated by the heat pump 30 while circulating in the order of the passage 42 (circulating between the heat pump 30 and the floor heating panel 20), and radiating heat to the floor heating panel 20.

As a result, the floor temperature rises (heating rises). It takes some time for the floor temperature to reach the desired temperature, but there is no problem since the user normally sets the heating start time in consideration of the rising time. After the heating is completed and a steady state is reached, the user uses the heated room. Thus, a comfortable heating state can be provided.

When the user turns off the switch 22a of the operation panel 22 (or the remote control operation panel), the second heating mode and, consequently, the heating operation ends (step 12).
1). That is, the heat pump 30 and the heat medium circulation pump 4
0 is stopped.

Next, when the timer reservation of the heating start time is not set (step 100 → step 10)
1) will be described. In this case, the controller 50
Performs control to secure the amount of heat necessary for conversion to heating in the hot water tank 10 (step 101). That is, the amount of heat q1 required to start heating is estimated based on the difference between the detection value of the floor temperature sensor 52 and the target value of the floor temperature during heating. Also, based on the detection value of the water temperature sensor 51, the hot water tank 1
The temperature and amount of the hot water in 0, and hence the heat quantity q2 that can be extracted from the hot water by the heat exchanger 60 are estimated. Then, when q1> q2 + α (α is a rise in consideration of the amount of heat to be left for the original hot water supply), the sheathed heaters 11 and 12 are turned on to boil the hot water storage tank 10. .

When the user turns on the switch 22a of the operation panel 22 (or remote control operation panel) (step 102), the controller 50 executes a heating operation in the first heating mode (step 103). In this mode, the passage 43 and the passage 41b are communicated by the electromagnetic three-way valve 45, and the heat medium circulation pump 40 is driven.
Thereby, the heat medium circulates in the order of the heat exchanger 60, the passage 43, the passage 41b, the radiator pipe 21, the passage 42a, and the passage 44 (circulation between the heat exchanger 60 and the floor heating panel 20).
Meanwhile, heat is extracted from the hot water in the hot water storage tank 10 by the heat exchanger 60 and is radiated to the floor heating panel 20. Since this heat is prepared in advance in the hot water storage tank 10 and is not newly generated, the floor heating panel 20 can be immediately heated. As a result, the floor temperature can be raised rapidly, and heating can be started up in a short time. In addition, since the required heat quantity q1 is secured in step 101, the heating can be reliably started up to the target temperature and the heating can be brought into a steady state.

When the floor temperature reaches a target (heating steady state),
The mode is switched from the first heating mode to the second heating mode described above (step 120). That is, the heat medium circulation pump 40
Is continuously driven, and the passage portion 41 is controlled by the valve 45.
The heat pump 30 is driven by making the a and 41b communicate with each other. Thereby, a comfortable heating state can be maintained. Note that the timing of switching from the first heating mode to the second heating mode may be based on when the elapsed time from the start of the heating operation (that is, the operation time of the first heating mode) has reached a predetermined value.

Thereafter, similarly to the case where the timer is set, the heating operation is ended by turning off the switch 22a (step 121).

As described above, depending on whether the timer is set or not, the heating is performed by the heat pump 30 from the beginning, or the heating is started by the heat of the hot water storage tank 10, so that the hot water for hot water supply is efficiently used for heating. It is possible to eliminate the discomfort caused by the delay in the rise of the heating while diverting the heating.

Although not shown in FIG. 2, the controller 50 controls the sheathed heaters 11 and 12 every night at midnight, regardless of whether a timer is set or not, and irrespective of the heating operation.
Is turned on, and the hot water storage operation is performed. This makes it possible to boil the inside of the hot water storage tank 10 using cheap electricity at midnight and prepare for hot water supply the next day.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted. As shown in FIG. 3, in the hot water supply / room heating system S ′ according to the second embodiment, the heat pump 3
0 is used not only for heating but also as a heat source for hot water supply. That is, the system S
Are not provided.
Instead, a heat exchanger 70 and a water heating passage 13 for thermally connecting the heat pump 30 and the hot water storage tank 10 are provided.

The upstream end of the water heating passage 13 is
The downstream end is connected to the upper end of the hot water storage tank 10. A water pump 14 is provided in the passage 13.

The heat exchanger 70 is interposed between the water heating passage 13 and the heat medium passage 42b. That is, a heat transfer tube 71 is provided in the passage 13, and a heat transfer tube 72 facing the heat transfer tube 71 is provided in the passage portion 42 b,
A heat exchanger 70 is configured by the heat transfer tubes 71 and 72. In this heat exchanger 70, heat is transferred from the heat medium in the heat transfer tube 72 (passage portion 42b) to the water in the heat transfer tube 71 (passage 13).

In the system S ', the heat medium circulating pumps 40A, 40B are provided in the passage 41a and the passage 44 instead of the heat medium circulating pump 40 in the passage 41b in the system S.
Are provided respectively. A short-circuit passage 46 extends from a passage portion 41a downstream of the pump 40A,
It is connected to the passage part 42b via (flow path switching means). The passage portion 41a is divided into a passage portion 41c on the pump 40A side and a passage portion 41 on the opposite side of the branch portion of the passage 46.
and d. The passage portion 42b includes an electromagnetic three-way valve 47.
Is divided into a passage portion 42d on the heat exchanger 70 side and a passage portion 42c on the opposite side.

The solenoid three-way valve 47 shuts off the passage 46 when the solenoid is turned on, for example, and the passage portions 42c, 4
2d communicates with each other. When the solenoid is off, the passage portion 42c is shut off and the passage 46 and the passage portion 42d communicate with each other.

FIG. 4 shows a control flow of the system S '. Also in the system S ′, when the timer for the heating start time is not set (step 10).
0 → Step 101), the required amount of heat q1 for heating up is secured in the hot water tank 10 (Step 10).
1) When the switch 22a is turned on (step 10)
2), the first heating mode is executed to start heating (step 103), and then the mode is switched to the second heating mode (step 120).

When securing the required heat quantity q1 in step 101 of the system S ', a hot water storage operation using the heat pump 30 as a heat source is executed. That is, the electromagnetic three-way valve 47
By this, the passage portion 42c is blocked and the passage 46 and the passage portion 42d are communicated. And the heat pump 30
The heat medium circulation pump 40A and the water supply pump 14 are driven.
Thereby, the heat medium is supplied to the heat receiving tube 31, the passage portion 41c,
Circulation in the order of passage 46 and passage portion 42d (heat pump 3
0 and circulates between the heat exchanger 70) and water
It is sent from the lower part of the hot water storage tank 10 to the upper part of the hot water storage tank 10 through the passage 13. Then, heat given to the heat medium from the heat pump 30 is transferred from the heat medium to water in the heat exchanger 70. Thereby, the water becomes hot water and is stored in the upper part of the hot water storage tank 10. The content of the hot water storage operation is the same when the inside of hot water storage tank 10 is boiled every night at midnight.

In the first heating mode in step 103 of the system S ′, the passage portion 41 is controlled by the three-way solenoid valve 45.
The heat medium circulating pump 40B is driven by blocking the passage d and connecting the passage 43 with the passage portion 41b. Thereby, the heat medium is circulated between the heat exchanger 60 and the radiator pipe 21, and the heat of the hot water in the hot water storage tank 10 is supplied to the floor heating panel 20.

In the second heating mode in step 120 of the system S ′, the passage 43 is shut off by the electromagnetic three-way valve 45, the passage portion 41 d is communicated with the passage portion 41 b, and the passage 46 is shut off by the electromagnetic three-way valve 47. At the same time, the passage portions 42c and 42d communicate with each other. Then, the heat pump 30 and the heat medium circulation pump 40A are driven. As a result, the heat medium is transferred to the heat receiving tube 31 and the passage portion 4.
1c, 41d, passage 41b, radiator tube 21, passage 42
a, while being circulated in the order of the passage portions 42c and 42d (circulating between the heat pump 30 and the floor heating panel 20), it is heated by the heat pump 30 and radiates heat to the floor heating panel 20.

When the timer for the heating start time is set in the system S '(step 100 → step 104), the control content differs depending on whether or not the hot water storage operation at midnight is being executed. That is, when the hot water storage operation is not being executed (step 104 → step 11)
0A), it is monitored whether or not the set time has come (step 110A), and after the set time, the second heating mode is executed (step 120).

On the other hand, if the hot water storage operation is being performed in step 104, the process proceeds to step 110B. Then, until the set time comes, the heat pump 30 during the hot water storage operation is operated in time for storing the hot water (step 111). That is, based on the remaining time up to the set time or the difference between the detection value of the water temperature sensor 51 and the target value for boiling, the output of the heat pump 30 is controlled so that the water temperature reaches the target value at the latest at the set time. Adjust. Specifically, when the remaining time is small relative to the difference between the water temperature and the target value, the output of the heat pump 30 is increased. This makes it possible to make the hot water storage as complete as possible at the set time (step 110B → step 112 →
Step 120) and thereafter, the heat pump 30 can be used for the heating operation in the second heating mode (step 120).

If the hot water storage is not completed by the set time even by adjusting the output of the heat pump 30 (step 110B → step 112 → step 113), the hot water storage operation is continued, and the first heating operation is performed in parallel with this operation. Is executed (step 113). That is, in addition to the heat pump 30, the heat medium circulation pump 40A, and the water supply pump 14 being driven for the hot water storage operation, the heat medium circulation pump 40B for the first heating operation is also driven. The passage portion 42c is blocked by the electromagnetic three-way valve 47, and the passage 46 and the passage portion 42d are communicated with each other. In addition, the passage portion 41d is blocked by the electromagnetic three-way valve 45, and the passage 43 and the passage portion 41b are closed. Is communicated. As a result, the heat in the hot water storage tank 10 is supplied to the floor heating panel 20, and the heat of the heat pump 30 is further supplied to the floor heating panel 20 via the hot water storage tank 10, so that heating can be started.

In this step 113, the amount of heat extracted from the heat exchanger 60 in the hot water storage tank 10 may temporarily become larger than the amount of heat supplied from the heat pump 30, but as the floor temperature rises, the heat exchanger Since the amount of heat extracted from the heat pump 30 becomes smaller,
The amount of heat supplied from the furnace becomes higher. Thereby, the water in the hot water storage tank 10 can be boiled up to the target value, and the hot water storage can be completed.

Thereafter, the water supply pump 14 is stopped to stop the hot water storage operation. Then, the mode is switched from the first heating mode to the second heating mode (step 120). In other words, the heat pump 30 and the heat medium circulation pump 40A continue to be driven, while the heat medium circulation pump 40B is stopped. Further, the passage 43 is shut off by the electromagnetic three-way valve 45, and the passage portion 41d and the passage portion 41b are communicated. The passage 46 is shut off by the electromagnetic three-way valve 47, and the passage portions 42c and 42d are closed.
Communication.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, passage 4
Connection between 2,44 and passage 4 in system S '
An electromagnetic three-way valve (flow path switching means) may also be provided at the connection between the 1 and 46.

[0040]

As described above, according to the first aspect of the present invention, depending on whether the heating start time is set or not, heating is performed from the beginning with a heat source device or started up by the heat of a hot water storage tank. By doing so, it is possible to eliminate the discomfort due to the slow start-up of heating while efficiently diverting the hot water for hot water supply for heating. According to the second feature of the present invention, when the heating start timing has not been set, the necessary heat amount for heating startup is secured before the operation instruction of the heater is issued. Can be reliably raised to the target temperature, and the heating can be brought into a steady state. According to the third feature of the present invention, in a system in which hot water storage and heating are performed by a common heat source device, when hot water storage is performed by the common heat source device when heating start timing is set, the hot water storage operation is performed. Can be completed as much as possible up to the set time, and after the set time, the heat source device can be used for the heating operation. According to the fourth aspect of the present invention, in the above-mentioned third aspect, even when the hot-water storage operation is not completed by the set time, the hot-water storage can be continued and heating can be performed in parallel therewith.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply / room heating system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an outline of a control flow of the system.

FIG. 3 is a schematic configuration diagram of a hot water supply / room heating system according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing an outline of a control flow of the system according to the second embodiment.

[Explanation of symbols]

 S, S 'Hot water supply / heating system 10 Hot water tank 11, 12 Seed heater (dedicated heat source) 20 Floor heating panel (heater) 22b Setting unit (setting means) 30 Heat pump (heat source device) 50 Controller (control means) 51 Water temperature sensor ( Water temperature detecting means) 52 Floor temperature sensor (Temperature detecting means) 60 Heat exchanger

Claims (4)

[Claims] 1. A heat source device for applying heat to a heat medium, a hot water storage tank for storing water heated by heat exchange with the heat medium or by a dedicated heat source separate from the heat source device, A heat exchanger that is housed in the upper portion and transfers heat from water to the heat medium, and is selectively connected to one of the heat source device or the heat exchanger, and the heat medium is circulated between the one and the other. A heater for receiving heat from the heat medium, setting means for setting a heating start time, and control means, wherein the control means, when the time setting is not performed, In response to the operation instruction of the heater, a first heating mode for circulating the heat medium between the heat exchanger and the heater is executed to start heating, and thereafter, the heat source device and the heater A second heating mode in which the heat medium is circulated between Hot water heating system if they are performed, characterized in that to perform said second heating mode from the initial heating startup of the setting time after. A temperature detector for detecting a temperature of the heater or a temperature of a heating medium around the heater; and a water temperature detector for detecting a temperature of water in the hot water storage tank. If no settings have been made,
Before the operation instruction of the heater, the amount of heat required for heating up is estimated based on the detection value of the temperature detection unit, and the heat exchanger is extracted from the hot water storage tank based on the detection value of the water temperature detection unit. By estimating the amount of heat that can be supplied to the heater via the above, such that the amount of heat that can be supplied exceeds the required amount of heat, by driving the heat source unit to perform heat exchange from the heat medium to water, The hot water supply / heating system according to claim 1, wherein the water in the hot water storage tank is heated by driving the dedicated heat source. 3. A water temperature detecting means for detecting a water temperature in the hot water storage tank, wherein the water in the hot water storage tank is heated by heat exchange with a heat medium heated by the heat source device. When the time is set and the heat source device is driven to heat the water in the hot water storage tank, the control means adjusts the detection value of the water temperature detection means and the set time. 3. The hot water supply and heating system according to claim 1, wherein the output of the heat source device is adjusted so that a water temperature of the hot water storage tank reaches a target value by a set time. 4. 4. The control means as a result of the output adjustment,
When the set time has arrived before the water temperature of the hot water tank has reached the target value, the first heating is initially performed instead of executing the second heating mode from the start of heating after the set time. 4. The hot water supply and heating system according to claim 3, wherein the mode is executed, the heating of the water in the hot water storage tank by the heat source device is continued, and the mode is switched to the second heating mode after the water temperature reaches a target value. 5. system.