JP2001194012A - Solar heat utilization hot water supply/heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar heat utilizing hot water supply/heating apparatus which utilizes solar heat for heating with minimum energy saving. SOLUTION: There is provided a solar heat utilization hot water supply/ heating apparatus T1 which includes a solar heat concentrator 1, a hot water storage tank 2 storing hot water therein, a hot water storage tank water heating heat exchanger 4 and a heating heat medium heating heat exchanger 5, a heating heat dissipater 6, and control means 7, 8 wherein when temperature of hot water in the hot water storage tank 2 is less than a predetermined value, disables a flow of the foregoing heat medium to the heating heat dissipater 6, while when the same temperature exceeds the predetermined value, enables the flow of the heat medium to the heating dissipater 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar hot water supply and heating apparatus for performing hot water supply and heating using solar heat.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 7-19050 discloses a solar hot water supply / heating device for supplying hot water and heating using solar heat.
No. 2 is known. The solar heat utilizing hot water supply and heating device described in this publication is provided with a hot water storage tank storing hot water used for hot water supply and a heat storage tank storing hot water used for heating separately, and uses solar heat for heating. In such a case, the hot water in the heat storage tank is used as a heat source of a heating heat pump.

[0003]

In the above-described conventional solar hot water supply / heating apparatus, since hot water heated by solar heat is used as a heat source for the heating heat pump, the heat pump is not driven or the heat pump is not installed. In addition, it is not possible to heat using solar heat, for example, in the early winter or early spring, etc., but it is possible to fully use solar heat, but at the time of indoor heating, etc., it satisfies the need to heat with minimal energy consumption I couldn't do that.

[0004] The present invention has been made in view of the above circumstances, and has as its object to provide a solar hot water supply and heating device that can utilize solar heat for heating with minimum energy consumption.

[0005]

According to a first aspect of the present invention, there is provided a solar hot water supply / heating apparatus comprising a solar heat collector, a hot water storage tank for storing hot water, a hot water supply facility using hot water in the hot water storage tank, and the hot water storage tank. A water tank water heating heat exchanger that is built in and exchanges heat between the heat medium heated by the solar heat collector and water in the hot water tank, and a water heat exchanger that is built in the hot water tank and that is in the hot water tank. A heating heat medium heating heat exchanger that exchanges heat with a heating medium used for heating, a heating radiator that releases heat received by the heating medium used for heating to an external environment, When the temperature of the hot water in the hot water tank is not more than a predetermined value, the circulation of the heat medium used for heating to the radiator for heating is prohibited. Control means for permitting a heat medium used for heating to flow to the heating radiator. .

In the present invention, the heat collected by the solar heat collector is stored as hot water in the hot water tank via the hot water tank heat exchanger, so that the solar heat can be used for hot water supply. Further, another heat exchanger (heating heat medium heating heat exchanger) built in the hot water tank can transfer the heat of the hot water in the hot water tank to the heating heat medium. Is passed through a heating radiator, so that solar heat can be used for heating.

In this case, priority is given to using solar heat for hot water supply, and when the temperature of hot water in the hot water tank is low, there is no room for using solar heat for heating. Therefore, only solar water is used for hot water supply and not used for heating. Also, it is used for heating only when the temperature of the hot water in the hot water tank is high (when the heat in the hot water tank exceeds a sufficient amount for hot water supply, that is, when the temperature of the hot water in the hot water tank exceeds a predetermined value). Like that. As described above, although solar heat is normally used only for hot water supply, when there is excess heat, the heat can be used for heating, so that effective use of solar energy can be achieved.

Here, when the heating medium is used for heating, the heat medium heated by the hot water in the hot water tank flows directly to the radiator for heating.
Heating such as a heat pump does not necessarily operate, and indoor heating can be covered only by solar heat.

In a second aspect of the present invention, in the solar hot water supply / heating apparatus according to the first aspect, the control means is provided between the heating radiator and the heat medium heating heat exchanger in the hot water storage tank. In parallel via a three-way valve that performs at least some functions,
An auxiliary heater for heating the heat medium used for the heating is connected.

According to the present invention, when the temperature of the hot water in the hot water tank is low and solar heat cannot be used for heating,
By operating the auxiliary heater by switching the three-way valve so that the heat medium circulates between the auxiliary heater and the radiator for heating,
Normal heating can be performed.

A third aspect of the present invention is directed to a solar hot water supply / heating apparatus according to the first or second aspect, wherein the heating radiator is installed under a floor of a building. in this case,
It is preferably applied to houses with basic insulation.

According to the present invention, underfloor heating can be performed using solar heat. When heating using solar heat, it may not always be possible to use a sufficient amount of heat for heating due to the priority on hot water supply. Can serve as an auxiliary. In other words, when heating under the floor, effective heating is performed even at a lower temperature than indoor heating, so that heat can be used more effectively even when the temperature of surplus heat is relatively low. . Therefore, the escape of heat from the room through the floor can be reduced, and as a result, the indoor heating effect can be enhanced.

According to a fourth aspect of the present invention, there is provided a solar hot water supply / heating apparatus according to the first or second aspect, wherein the heating radiators are installed in a building and under a floor, respectively, and the heating radiators on the indoor side are distributed. The two heating radiators are connected in series so that the heat medium then flows to the heating radiator below the floor.

According to the present invention, when the heat medium flows through the heating radiator, the heat medium first flows into the indoor heating radiator to perform heat exchange, and then flows to the heating radiator below the floor. Flow and heat exchange. Thus, the room can be heated at a high temperature, and the underfloor can be heated at a low temperature. That is, as described above, the underfloor heating can obtain an effective heating effect even at a low temperature, and thus, as in the present invention, the heat medium whose temperature has been reduced by passing through the indoor-side heating radiator is continuously applied. By turning it to a radiator for heating under the floor, the underfloor can be sufficiently warmed and the solar heat can be used effectively without waste.

In a fifth aspect of the present invention, there is provided a hot water supply / heating device using solar heat, a hot water storage tank for storing hot water, a hot water supply facility using the hot water in the hot water storage tank, and a heat exchanger for heating the hot water tank built in the hot water tank. A heat medium circulation system for hot water supply using solar heat that circulates a heat medium between the solar heat collector that collects solar heat, a heater for heating that heats the heat medium by heating means, and heat of the heat medium in the external environment And a heating medium circulating system for circulating a heating medium between the heating radiator and the heating radiator, wherein the heating medium outlet side of the solar heat collector and the heating medium inlet side of the heating radiator. Are connected via flow path switching means, and the heat medium input side of the solar heat collector and the heat medium output side of the heating radiator are connected via flow path switching means, and the two flow paths are switched. By switching the means, the heat medium can be circulated between the solar collector and the radiator for heating. Characterized by comprising a control means.

According to the present invention, by connecting the heating medium circulation system for hot water supply using solar heat and the ordinary heating medium circulation system for heating using heating means other than the solar heat, the solar heat collector is used when necessary. The heated heat medium is passed directly to the radiator for heating so that heating can be performed.

In this case, since the heat medium warmed by the solar heat collector flows directly to the radiator for heating, there is no need to perform extra heat exchange on the way as in the prior art, and the efficiency of using solar heat is improved. Further, since a heat storage tank for heating is not required, cost can be reduced.

According to a sixth aspect of the present invention, in the solar hot water supply / heating apparatus according to the fifth aspect, the control means may be configured so that the temperature of the heat medium of the solar heat collector is higher than the temperature of the heat medium in the hot water storage tank and the predetermined temperature. When the temperature is equal to or higher than the temperature, the flow path switching unit is controlled to circulate the heat medium between the heating radiator and the solar heat collector.

According to the present invention, the solar heat is used for heating only when the temperature of the heat medium of the solar heat collector is higher than the temperature of the heat medium in the hot water storage tank and is equal to or higher than a predetermined temperature. At other times, that is, when the temperature of the heat medium of the solar heat collector is lower than the temperature of the heat medium in the hot water storage tank, or when the temperature of the heat medium of the solar heat collector is equal to or lower than a predetermined temperature, the solar heat is heated. Do not use for.

The solar heat utilizing hot water supply and heating device according to the invention of claim 7 is characterized in that, in claim 5 or 6, the radiator for heating is installed in the room and under the floor of the building, respectively. A heat medium can be circulated between at least one of the heating radiators.

According to the present invention, between the solar heat collector and the indoor radiator for heating, between the solar heat collector and the radiator for heating below the floor, or between the solar heat collector and the indoor radiator for heating. Since the heat medium can be circulated between the radiator for heating and the radiator for heating under the floor, the solar heat can be effectively used for indoor heating, underfloor heating, or both indoor and underfloor heating.

According to an eighth aspect of the present invention, in the solar hot water supply and heating apparatus according to the seventh aspect, the indoor-side heating radiator and the under-floor heating radiator are connected in series, and the indoor-side heating radiator is connected. The heat radiator for cooling is disposed upstream of the heating radiator below the floor in the flow direction of the heat medium.

In the present invention, similar to the fourth aspect,
When the heat medium flows through the heating radiator, the heat medium first flows into the indoor heating radiator to perform heat exchange, and then flows into the heating radiator below the floor to perform heat exchange. Thus, the room can be heated at a high temperature and the underfloor can be heated even at a low temperature, so that the solar heat can be used effectively without waste.

In a ninth aspect of the present invention, in the solar hot water supply and heating apparatus according to the fifth or sixth aspect, the radiator for heating is installed in a room and under the floor of a building, respectively, and the solar heat collector and the heating of the room side are provided. Medium circulation destination selection to select between circulating the heat medium between the heat radiator and the solar heat collector and circulating the heat medium between the under-floor heating radiator Means, wherein the control means controls the heat medium circulation destination selecting means when the temperature of the heat medium of the solar heat collector is higher than the temperature of the heat medium in the hot water tank and is equal to or higher than a predetermined temperature. The heat medium is circulated between the solar heat collector and the indoor heat radiator, and the temperature of the heat medium of the solar heat collector is lower than the temperature of the heat medium in the hot water tank and the temperature of the underfloor space. If it is higher than the above, the heat medium circulation destination selecting means is controlled to control the solar heat collector and the underfloor heating discharge. Wherein the circulating heating medium to and from the vessel.

According to the present invention, when the temperature of the heat medium of the solar heat collector is higher than the temperature of the heat medium in the hot water storage tank and is equal to or higher than a predetermined temperature, the solar heat is supplied to the indoor radiator for heating. Perform heating. Also, when the temperature of the heat medium of the solar heat collector is lower than the temperature of the heat medium in the hot water tank and higher than the temperature of the underfloor space, the solar heat is supplied to the underfloor heating radiator to perform underfloor heating. . In other words, if the temperature of the heat medium of the solar heat collector is lower than the temperature of the heat medium in the hot water tank, it does not help to raise the water temperature of the hot water tank as it is, but if it is still higher than the underfloor space, Effective use of solar heat can be achieved by using it for heating.

A solar hot water supply / heating apparatus according to a tenth aspect of the present invention provides a solar heat collector, a heat medium circulating system for circulating the heat medium heated by the solar heat collector, a hot water storage tank for storing hot water, A hot water supply system using hot water in a hot water storage tank, and a heat transfer medium circulation system for hot water supply utilizing solar heat for circulating a heat medium between the hot water storage tank water heating heat exchanger built in the hot water storage tank and the heat transfer medium circulation system And, a heating radiator for emitting heat to the external environment and a heating medium circulation system for circulating a heating medium between the heating medium circulation system, and a system comprising: A flow control means for adjusting the flow rate of the heat medium is provided.

According to the present invention, by providing the flow rate control means for adjusting the flow rate of the heat medium in the heating heat medium circulation system, the heat load in the heating radiator can be adjusted, and the temperature of the hot water storage tank can be reduced. It is possible to drive without dropping.
Furthermore, by circulating the heat medium through the radiator for heating, the temperature of the heat medium is lowered, and high-efficiency heat collection by the solar heat collector becomes possible.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, each embodiment of the present invention (first embodiment)
Embodiment 9 to Embodiment 9) will be described with reference to the drawings.
Note that the first to third embodiments are embodiments of the inventions of claims 1 to 4 (an invention of a type in which a heating heat medium is heated via hot water in a hot water storage tank), and a fourth embodiment. The seventh to seventh embodiments are the inventions of claims 5 to 9 (invention of the type in which the heat medium heated by the solar heat collector is directly passed to the radiator for heating).
FIG. The eighth embodiment and the ninth embodiment are embodiments of the invention of claim 10 (an invention of a type in which a heat medium heated by a solar heat collector flows through a hot water tank and a radiator for heating).

[First Embodiment] FIG. 1 shows the configuration of a solar hot water supply / heating device T1 according to a first embodiment. The solar hot water supply / heating device T1 includes a solar heat collector 1 installed on the roof of a building M, a hot water storage tank 2 for storing hot water, a hot water supply facility 3 using hot water from the hot water storage tank 2, and a hot water storage tank 2. A hot water tank water heating heat exchanger 4 for exchanging heat between a built-in heat medium heated by the solar heat collector 1 and water in the hot water tank 2;
A heating heat medium heating heat exchanger 5 for exchanging heat between water in the hot water storage tank 2 and a heating medium used for heating (hereinafter, referred to as “heating medium for heating”). When the temperature of the hot water in the hot water storage tank 2 is equal to or lower than a predetermined value (for example, 50 ° C.), the fan coil unit 6 serving as a radiator for heating that radiates the heat received by the heat medium to the external environment to heat the room. The three-way valves (flow path switching means) 7 and 8 are switched to prohibit the flow of the heating heat medium to the fan coil unit 6, and
Control means (not shown) for permitting the heat medium for heating to flow through the fan coil unit 6 when the temperature of the hot water in the inside exceeds a predetermined value (for example, 50 ° C.); An auxiliary heater 9 connected in parallel with the heating heat medium heating heat exchanger 5 via the three-way valves 7 and 8 is provided.

In the figure, reference numeral 11 denotes a solar heat collector 1
A pump that circulates a heat medium between the heat exchanger 4 and the hot water tank water heating heat exchanger 4, a pump 12 that circulates a heating heat medium, 13 a temperature sensor that detects the temperature of hot water in the hot water tank 2, 14, The temperature sensor detects the temperature of the heat medium on the outlet side of the solar heat collector 1. Ethylene propylene glycol is used as the heat medium. The auxiliary heater 9 is the same as that used in a normal cooling and heating system that heats a heating heat medium with a heat pump using outside air as a heat source. Further, the hot water supply equipment 3 is equipped with a pump and a reheating mechanism as required.

Next, the operation of the solar hot water / hot water supply / heating device T1 will be described. First, heat collected by the solar heat collector 1 is stored in a hot water storage tank 2 as hot water, and the hot water in the hot water storage tank 2 is used for hot water supply through a hot water supply facility 3.

Here, the temperature of the hot water in the hot water storage tank 2 is 50 ° C.
Is exceeded, the control means switches the three-way valves 7 and 8 as needed to drive the pump 12 so as to meet the demand for heating using solar heat. When the pump 12 is operated by switching the three-way valves 7 and 8 to the solar heat utilization side, the heating heat medium exchanges heat with the fan coil unit 6 installed in the room of the building M and the heating heat medium heating in the hot water storage tank 2. Circulates between the hot water storage tank 2 and the hot water in the hot water storage tank 2, and circulates with the hot water in the hot water storage tank 2. , The room is heated by solar heat. Therefore,
Heating without using a heat pump can be realized,
Energy consumption can be minimized and solar energy can be used effectively.

On the other hand, when the temperature in the hot water storage tank 2 becomes 50 ° C. or less, the control means switches the three-way valves 7 and 8 so that the heat exchanger 5 for heating the heating medium for heating in the hot water storage tank 2 is turned on. It is separated from the coil unit 6 and the use of the heat of the hot water in the hot water tank 2 for heating is stopped, and the hot water supply is prioritized.

In this case, when heating is performed, from heating using solar heat to heating using an auxiliary heater 9 connected in parallel to the heating medium heating heat exchanger 5 with respect to the fan coil unit 6. Switch. In FIG. 1, a dotted arrow B indicates a circulation path of the heating heat medium at that time. Thereby, even when the temperature in the hot water tank 2 is 50 ° C. or less, sufficient heating can be performed, and at the same time, the hot water tank 2
The warm water inside can be used for hot water supply without difficulty. That is, since the hot water in the hot water storage tank 2 does not exchange heat with the heating heat medium, the temperature of the hot water does not decrease and the solar heat can be preferentially used for hot water supply.

When the temperature of the hot water in the hot water storage tank 2 is higher than the temperature of the heat medium heated by the solar heat collector 1, the control means stops the pump 11, and the solar heat collector 1 Avoid circulation of heat medium.

[Second Embodiment] FIG. 2 shows the configuration of a solar hot water supply / heating device T2 according to a second embodiment. The difference between the solar hot water supply and heating device T2 of this embodiment and the solar hot water supply and heating device T1 of the first embodiment is that the fan coil unit 16 is installed in the underfloor space Y of the building M. The other configuration is exactly the same as the solar hot water supply / heating device T1 of the first embodiment, and thus the description is omitted.

Here, the underfloor space Y is a space surrounded by the floor, the foundation and the ground, and in this building M, the foundation is insulated (the foundation of the building is made of a heat insulating material with respect to the outside. Insulated).

In the solar hot water supply / heating device T2, when heating using the solar heat is started when the temperature of the hot water in the hot water tank 2 exceeds 50 ° C., the heating medium for heating uses the hot water in the hot water tank 2 And heats the air under the floor via the fan coil unit 16 installed in the underfloor space Y. Also, when solar heat cannot be used for heating, the underfloor heating using the auxiliary heater 9 can be performed by switching the three-way valves 7 and 8 as in the first embodiment.

Incidentally, in the case of heating using solar heat, it may not always be possible to use a sufficient amount of heat for heating due to a priority on hot water supply. By heating the room (see Fig. 2
In this case, the description is omitted.) In other words, when heating under the floor, effective heating is performed even at a lower temperature than indoor heating, so that heat can be used more effectively even when the temperature of surplus heat is relatively low. . Therefore, the escape of heat from the room through the floor can be reduced, and as a result, the indoor heating effect can be enhanced.

[Third Embodiment] FIG. 3 shows a configuration of a solar hot water supply / heating device T3 according to a third embodiment. The solar hot water supply / heating device T3 of this embodiment is the solar hot water supply / heating device T1, T2 of the first embodiment or the second embodiment.
The difference is that the fan coil unit 6,
16 are installed, and the two fan coil units 6 and 16 are connected in series such that the heat medium flowing through the fan coil unit 6 on the indoor side flows to the fan coil unit 16 on the underfloor side thereafter. . Other configurations are
Solar hot water supply / heating device T1 of the first and second embodiments,
Since it is exactly the same as T2, the description is omitted.

In the solar hot water supply / heating device T3, when heating using the solar heat is started when the temperature of the hot water in the hot water tank 2 exceeds 50 ° C., the heating medium for heating uses the hot water in the hot water tank 2 First, the room air is warmed via the fan coil unit 6 on the indoor side, and then flows to the fan coil unit 16 on the lower floor to warm the air under the floor. Thus, the room can be heated at a high temperature by solar heat, and the space under the floor can be heated even at a low temperature. That is, as described above, the underfloor heating can obtain an effective heating effect even at a low temperature, so that the heat medium whose temperature has decreased through the indoor fan coil unit 6 is continuously cooled by the underfloor fan coil. By turning it to the unit 16, the underfloor space Y can be sufficiently warmed, and the solar heat can be used more effectively.

When heating is used when the temperature in the hot water storage tank 2 is 50 ° C. or lower, as described above, the heating using the solar heat is performed so that the fan coil units 6 and 16 heat the heating medium for heating. The mode is switched to heating using the auxiliary heater 9 connected in parallel with the exchanger 5. Thereby, indoor and underfloor heating can be performed.

[Fourth Embodiment] FIG. 4 shows the configuration of a solar hot water supply / heating device T4 according to a fourth embodiment. The solar hot water supply / heating device T4 includes a hot water storage tank 2 for storing hot water, a hot water supply facility 3 using hot water in the hot water storage tank 2, a hot water tank water heating heat exchanger 4 built in the hot water storage tank 2, and solar heat. A heating medium circulation system J1 for hot water supply utilizing solar heat for circulating a heating medium between the solar heat collector 1 for collecting heat, and an air heat source heat pump 25
Between the heater 24 for heating the heating medium for heating and the fan coil unit 6 as a heating radiator for heating the room by releasing the heat received by the heating medium for heating to the external environment. And a heating medium circulating system J2 for circulating heat. The three-way valves (flow path switching means) 33, 34 connect the heating medium outlet side of the solar heat collector 1 and the heating medium inlet side of the fan coil unit 6 to each other.
And a heat medium inlet side of the solar heat collector 1 and a heat medium outlet side of the fan coil unit 6 via three-way valves (flow path switching means) 35 and 36 and a flow path 32. connection,
The three-way valves 33, 34, 3
By switching between 5 and 36, the heat medium can be circulated between the solar heat collector 1 and the fan coil unit 6.

The heat medium circulation system J1 for hot water supply using solar heat and the heat medium circulation system J2 for heating use will be described in detail. The heat medium circulation system J1 for hot water supply using solar heat is composed of a solar heat collector 1, a three-way valve 33, and a hot water tank. The heat medium is circulated in the order of the heat exchanger for water heating 4 → the pump 11 → the check valve 39 → the three-way valve 35 → the solar heat collector 1. In addition, the heating heat medium circulation system J2 includes a heating heater 24 → a check valve 38 → a three-way valve 34 →
Service tank 21 → Pump 22 → Fan coil unit 6 → Service tank 21 → Pump 27 → Three-way valve 36 →
The heating medium is configured to circulate in the path of the heating heater 24.

The fan coil unit 6 is installed in the room of the building M, and the hot water tank 2, the heating medium outlet side of the solar heat collector 1, and the service tank 21 have temperature sensors 13, respectively.
Non-return valves 37 and 40 are provided in the flow paths 31 and 32 connecting the two circulation systems.
Ethylene propylene glycol is used as a heat medium. In addition, the hot water supply equipment 3 has
Equipped with a not-shown pump and additional cooking mechanism.

Next, the operation of the solar hot water / hot water supply / heating device T4 will be described. The water heating operation of the hot water tank by the solar heat is started by the control means (not shown) when the temperature of the heat medium in the solar heat collector 1 is higher than the water temperature in the hot water tank 2 by 5 ° C. or more. Will be stopped. When collecting heat in the hot water storage tank 2, the solar heat collector 1 → the three-way valve 33 is operated by operating the three-way valves 33 and 35 incorporated in the hot-water supply heat medium circulation system J <b> 1 and driving the pump 11. → Heat exchanger water heating heat exchanger 4 → Pump 11 → Check valve 39 → Three-way valve 3
5 → The heat medium is circulated along the route of the solar heat collector 1 as shown by arrow C. Then, the heat medium warmed by solar heat collector 1 exchanges heat with water in hot water tank 2, and the water in hot water tank 2 is warmed.

When using the warmed hot water for hot water supply,
When the temperature of the hot water is lower than the usage temperature, additional cooking is performed. When the temperature is higher than the usage temperature, the hot water is mixed with city water and adjusted to the usage temperature before being used as hot water.

On the other hand, when heating the room using the air heat source heat pump 25, the three-way valves 34 and 36 incorporated in the heating heat medium circulation system J2 are operated and the pump 2 is operated.
By driving the heaters 2 and 27, the heating heater 24 → the check valve 38 → the three-way valve 34 → the service tank 21 → the pump 2
The heat medium is circulated as indicated by arrow D in the order of 2 → fan coil unit 6 → service tank 21 → pump 27 → three-way valve 36 → heating heater 24. Then, the heat of the heat medium heated by the heating heater 24 is transferred to the fan coil unit 6.
Is released to the outside environment, and the room is heated.

When the temperature of the hot water in the hot water storage tank 2 reaches a sufficient temperature (for example, about 60 ° C.) which can be directly used for hot water supply and a request for heating is issued, a control means (not shown) By switching the three-way valves 33, 34, 35, 36 to disconnect the hot water tank 2 from the solar heat collecting circuit and to drive the pumps 22, 27, the solar heat collector 1 → as shown by the arrow E in FIG. Three-way valve 33 → check valve 37 → three-way valve 34 → service tank 21 → pump 22 → fan coil unit 6 → service tank 21 → pump 27 → three-way valve 36 → check valve 4
The heat medium is circulated in the order of 0 → three-way valve 35 → solar heat collector 1. By doing so, the room can be directly heated using solar heat.

The use of the heat medium heated by the solar heat for heating is performed by heating the heat medium heated by the solar heat collector 1 by 5 ° C. from the heat medium temperature in the service tank 21.
If it is higher than above, stop at 2 ° C or less.

As described above, by connecting the hot water supply heat medium circulation system J1 and the heating heat medium circulation system J2,
The heat medium warmed by the solar heat collector 1 is allowed to flow directly to the indoor fan coil unit 6 for heating. Accordingly, the efficiency of solar heat utilization can be improved by the amount of no extra heat exchange on the way as in the conventional case. In addition, since a heat storage tank dedicated to heating is not required, costs can be reduced.

When the heat medium heated by the solar heat cannot be used for heating, the heating is performed using the air heat source heat pump 25 as described above. When the amount of heat collected by the solar heat is insufficient, the heat collecting operation by the solar heat and the supply of the heat by the air heat source heat pump 25 are alternately performed to reduce the power consumption of the air heat source heat pump 25.

In any case, in the solar hot water supply / heating device T4 of this embodiment, the heat of the heat medium heated by the solar heat is always used preferentially for warming the water in the hot water tank 2, and the hot water tank is used. It is used for heating only when the water in 2 is above 60 ° C. Therefore, by using the surplus heat for heating while securing a sufficient hot water supply capacity, it is possible to further effectively utilize the solar heat.

[Fifth Embodiment] FIG. 6 shows the configuration of a solar hot water supply / heating device T5 according to a fifth embodiment. The difference between the solar hot water supply and heating device T5 of this embodiment and the solar hot water supply and heating device T4 of the fourth embodiment is that the underfloor space Y of the building M is separate from the indoor fan coil unit 6.
A fan coil unit 46 is also installed in the flow path 31 that connects the hot water supply heat medium circulation system J1 and the heating heat medium circulation system J2.
32, a three-way valve (a heat medium circulation destination selecting means)
3 in that a circuit 41 with a pump 45 for flowing a heat medium to a fan coil unit below the floor is branched and connected via the third coil 3.
The other configuration is exactly the same as the solar hot water supply / heating device T4 of the fourth embodiment, and thus the description is omitted.

In the solar hot water supply / heating device T5,
When the condition that the hot water supply capacity can be sufficiently exhibited (for example, the condition that the hot water of 60 ° C. or more is sufficiently stored in the hot water storage tank 2) is satisfied, the temperature of the heat medium heated by the solar heat collector 1 is reduced. When the temperature is higher than the temperature of the underfloor space Y, the control means (not shown) controls the three-way valves 33, 35, 42,
By switching 43 and driving the pump 45, the solar heat collector 1 → the three-way valve 3 as shown by the arrow F in FIG.
3 → three-way valve 42 → pump 45 → fan coil unit 4
6 → the three-way valve 43 → the check valve 40 → the three-way valve 35 → the heat medium is circulated in the order of the solar heat collector 1. By doing so,
The underfloor space Y can be directly heated by the heat of the heat medium heated by the solar heat collector 1.

At this time, the heating of the room can be performed by flowing the heat medium warmed by the air heat source heat pump 25 through the fan coil unit 6 on the room side along the forward path indicated by the arrow D. Thereby, indoor heating can be performed by the air heat source heat pump 25, and heating of the underfloor space Y can be performed using solar heat. In general, at the time of heating, the temperature of the underfloor space is lower than that of the room, so that heat is radiated from the indoor space on the first floor toward the underfloor space Y. The heat radiation to Y can be reduced, and the indoor heating efficiency can be increased.

Further, by heating the underfloor space Y with the excess solar heat, the floor material, the underfloor space Y, and the foundation concrete can be used to heat the floor surface of the first floor, and the space above it can be heated space. , Regardless of whether it is a non-heated space. Therefore, even in an environment where the outside air temperature is low in the early morning, it is possible to keep the room temperature higher than the outside air temperature before starting the heating of the room.

The priority of supplying the heat medium heated by the solar heat collector 1 is the hot water tank 2 first, the indoor fan coil unit 6, and finally the fan in the underfloor space Y. The coil unit 6.

When supplying solar heat to the hot water storage tank 2 or supplying solar heat to the fan coil unit 6 on the indoor side, the heat medium may be flowed in the same route as that shown in FIGS. Therefore, the description is omitted here.

[Sixth Embodiment] FIG. 7 shows a configuration of a solar hot water supply / heating device T6 according to a sixth embodiment. The difference between the solar hot water supply / heating device T6 of this embodiment and the solar hot water supply / heating device T4 of the fourth embodiment is that the underfloor space Y of the building M is separate from the indoor fan coil unit 6.
The fan coil unit 46 is also installed in the room, and the fan coil unit 6 on the indoor side and the fan coil unit 4
6 is connected in series so that the former indoor fan coil unit 6 is on the upstream side of the heat medium flow. Another configuration is the solar hot water supply / heating device T of the fourth embodiment.
4, the description is omitted.

In the solar hot water supply / heating device T6 of this embodiment, when a heat medium flows through the indoor fan coil units 6 and 46, the heat medium first flows into the indoor fan coil unit 6 to exchange heat. Then, the heat flows to the fan coil unit 46 below the floor to perform heat exchange. This allows
The room can be heated at a high temperature, and the underfloor space Y can be heated at a low temperature. Therefore, when the heat medium warmed by the solar heat collector 1 flows through the fan coil units 6 and 46, the solar heat can be used more effectively without waste.

The condition that the heat medium warmed by the solar heat collector 1 is passed through the fan coil units 6 and 46 is such that the heat heated by the solar heat collector 1 is satisfied under the condition that the hot water supply capacity can be sufficiently exhibited. This is the case where the temperature of the medium is higher than the temperature of the underfloor space Y. In this case, the control means (not shown) switches the three-way valves 33, 34, 35, and 36 and drives the pumps 22 and 27, as shown by the arrow G in FIG. → Check valve 37
→ three-way valve 34 → service tank 21 → pump 22 → indoor fan coil unit 6 → underfloor fan coil unit 46 → service tank 21 → pump 27 → three-way valve 36 → check valve 40 → three-way valve 35 → solar heat collection The heat medium is circulated in the path of the heater 1. By doing so, the room and the underfloor space Y can be heated in this order by the heat of the heat medium heated by the solar heat collector 1.

Although the flow described above is for the case where the heat medium warmed by the solar heat collector 1 flows through the fan coil units 6 and 46, the heat medium warmed by the air heat source heat pump 25 is used for the fan coil unit. Also, when the air is flowed to 6, 46, almost the same heating effect can be obtained.

[Seventh Embodiment] FIG. 8 shows the configuration of a solar hot water supply / heating device T7 according to a seventh embodiment. The solar hot water supply / heating device T7 of this embodiment is obtained by slightly changing the solar hot water supply / heating device T5 of the fifth embodiment. This solar hot water supply / heating device T7 is different from the solar hot water supply / heating device T5 of the fifth embodiment in that the heat medium inlet side of the indoor fan coil unit 6 and the pump 22 in the heating heat medium circulation system J2. And a heat medium in the service tank 21 can be introduced to the heat medium input side of the fan coil unit 46 below the floor through the flow path 52 by the three-way valve 51. A three-way valve 53 is provided on the heat medium outlet side of the fan coil unit 46 below the floor, and the heat discharged from the heat medium outlet side of the fan coil unit 46 below the floor via the flow path 54 through the three-way valve 53. The point is that the medium can be returned to the service tank 21.

In this solar hot water supply / heating device T7,
The three-way valves 33, 34, 3
5, 36, 42, 43, 51, 53 and pumps 11, 2
By controlling 2, 27, and 45, the heat medium can be flowed along the routes shown in FIGS. 4, 5, and 6, but in addition, the heat can be flowed along the following routes. The medium can flow.

That is, in the heating heat medium circulation system J2, the three-way valves 51 and 53 are switched so that the heating heater 24 → the check valve 38 → the three-way valve 34 → the service tank 21 → the pump 22
→ three-way valve 51 → fan coil unit 46 under the floor → three-way valve 53 → service tank 21 → pump 27 → three-way valve 3
6 → The heating medium can be circulated along the route of the heating heater 24 as shown by the arrow H, and the underfloor space Y can be heated by the heat pump 25.

FIG. 5 shows a heat medium heated by the solar heat collector 1.
In the case of flowing along the same path as the path indicated by arrow E, the heat medium heated by the solar heat collector 1 is switched via the service tank 21 by switching the three-way valves 51 and 53 in FIG. Instead of 6, it can also flow to the fan coil unit 46 below the floor. Therefore, by alternately performing the switching operation of the three-way valves 51 and 53, the room and the underfloor space Y can be alternately heated using the solar heat, and the surplus solar heat can be further effectively used.

The three-way valves 51 and 53 are used to circulate a heat medium between the solar heat collector 1 and the indoor fan coil unit 6 and to connect the solar heat collector 1 and the fan coil unit 46 below the floor. Since it plays a role of alternatively selecting the case where the heat medium is circulated between the heat medium and the heat medium, it corresponds to a heat medium circulation destination selecting means. The control means (not shown) includes the solar heat collector 1
Of the heat medium in the hot water storage tank 2 (for example, 60
℃) and a predetermined temperature or higher (for example, 65 ℃ or higher), the three-way valves 51 and 53 are controlled to circulate the heat medium between the solar heat collector 1 and the indoor fan coil unit 6. And heat the room with solar heat. Further, the temperature of the heat medium of the solar heat collector 1 is equal to the temperature of the heat medium in the hot water storage tank 2 (60 ° C.).
When the temperature is lower and higher than the temperature of the underfloor space, the three-way valves 51 and 53 are controlled to circulate the heat medium between the solar heat collector 1 and the fan coil unit 46 on the underfloor side, and the underfloor space Y is heated by the solar heat. Warm with.

[Eighth Embodiment] FIG. 9 shows a configuration of a solar hot water supply / heating device T8 according to an eighth embodiment. The solar hot water supply / heating device T8 includes a solar heat collector 1 and a heat medium circulation system J that circulates the heat medium heated by the solar heat collector 1.
0, a hot water storage tank 2 for storing hot water, a hot water supply facility 3 using hot water in the hot water storage tank 2, a hot water tank water heating heat exchanger 4 built in the hot water storage tank 2, and the heat medium circulating system J0. A heat medium circulating system J1 for hot water supply utilizing solar heat for circulating a heat medium between the heat medium circulating system J0 and a fan coil 6 serving as a heating radiator for releasing heat to the external environment. And a heating medium circulation system J2 for heating.

The solar heat collector 1 is a hybrid panel integrated with a solar cell, and the hot water tank 2 has a capacity of 3
The fan coil 6, which has 00L and is a radiator for heating,
It is installed in the room of the building M or under a closed floor. As the heat medium, a 30% by weight aqueous solution of propylene glycol is used, and the heat medium is circulated by a pump 11 provided in a heat medium circulation system J0.

As shown in FIG. 9, the heating water circulation system J1 is provided upstream of the heating medium circulation system J0, and the heating heating medium circulation system J2 is located downstream of the heating water circulation system J1. As shown in FIG. 10 (a), the heating heat medium circulation system J2 is provided upstream of the heating medium circulation system J0, and the hot water supply heating medium circulation system J1 is connected to the heating heat medium. It may be provided downstream of the circulation system J2. Further, as shown in FIG. 10 (b), the heating medium circulation system J1 and the heating medium circulation system J2 may be arranged in parallel and connected to the heating medium circulation system.

The heat medium flow rate flowing through the heating heat medium circulation system J2 can be adjusted by a motor valve 72 (flow rate control means). As shown in FIG. 9, the heat medium circulation system J0, the hot water supply heat medium circulation system J1, and the heating heat medium circulation system J2 open and close the electromagnetic three-way valve 7 and the electromagnetic two-way valve 71 as flow path switching means. Allows three choices. One is a system in which the heat medium from the solar heat collector 1 passes through the hot water storage tank 2 and returns to the solar heat collector 1 as it is (when the electromagnetic two-way valve 71 is closed). Heat medium from the heater 1 is stored in the hot water tank 2
And a system that returns to the solar heat collector 1 through both the fan coil 6 (heating radiator) and the solar heat collector 1 (when both the electromagnetic three-way valve 7 and the electromagnetic two-way valve 71 are opened). Heat collector 1
Is a system (when the side of the electromagnetic three-way valve 7 that communicates with the hot water tank 2 is closed) after the heat medium from the heater returns to the solar heat collector 1 through only the radiator 6 for heating.

In the case of a system in which the heat medium circulates through both the hot water storage tank 2 and the fan coil 6 (heat radiator for heating), by adjusting the opening of the motor valve 72, the heat medium circulating flow rate to the fan coil 6 can be reduced. Can be adjusted continuously. In this case, the solenoid valve 7,
Since the temperature of the heat medium at the inlet of the solar heat collector 1 is higher than when the entire amount of the heat medium is circulated through the fan coil 6 by 71, the temperature of the hot water stored in the hot water tank 2 is not so low. No. As shown in FIG. 11, a motor valve 72 as a flow control means may be provided in the heating heat medium circulation system J2.

Next, a description will be given of a method of controlling the above-described solar water / hot water supply / heating device T8. As shown in FIG. 9, the heat collecting surface temperature of the solar heat collector 1 is measured by the temperature detector 14,
The temperature of the hot water tank near the heat exchanger 4 for hot water storage tank water is constantly measured by the temperature detector 13. When the temperature difference (heat collecting surface temperature−hot water tank temperature) becomes 15 ° C. or more, the system is switched to a system that circulates both the hot water tank 2 and the heating radiator 6. At this time, the electromagnetic two-way valve 71 on the fan coil 6 side is opened, and the motor valve 72 is gradually closed at the same time, and the motor valve 72 is stopped when the temperature difference reaches about 7 ° C. Further, when the temperature difference deviates by ± 2 ° C. from this point, the motor valve 72 is adjusted again to control the temperature to about 7 ° C. In the above control, when the temperature difference increases, the motor valve 72 is gradually closed, and the motor valve 72 may be fully opened or fully closed. If the set value is not reached even when fully opened,
The operation is switched to the operation of the circulation system using only the hot water storage tank 2.

In the eighth embodiment, the amount of heat load on the fan coil 6 can be adjusted by adjusting the flow rate of the heat medium flowing through the fan coil 6, and the operation without lowering the temperature of the hot water storage tank 2 so much can be achieved. Make it possible. Further, by circulating the heat medium through the fan coil 6, the temperature of the heat medium is reduced, and the solar heat collector 1 can collect heat with high efficiency.

[Ninth Embodiment] FIG. 12 shows a configuration of a solar hot water supply / heating device T9 according to a ninth embodiment. In the eighth embodiment, the temperature of the heat collecting surface of the solar heat collector 1 is measured by the temperature detector 14, and the temperature of the hot water tank near the heat exchanger 4 for hot water storage tank water is measured by the temperature detector 13. However, in the solar hot water supply / heating device T9 of the present embodiment, the temperature of the hot water tank near the heat exchanger 4 for hot water storage tank water is measured by the temperature detector 13, and the temperature of the heat medium at the outlet of the hot water tank 2 is measured. It is measured by the detector 13. The other parts are the same as those of the eighth embodiment, and the description of the same parts will be omitted.

A method of controlling the solar hot water supply / heating device T9 will be described. The temperature of the hot water tank near the heat exchanger 4 for heating the hot water tank and the temperature of the heat medium at the outlet of the hot water tank 2 are constantly measured by the temperature detectors 13 and 13, and the differential temperature (the heat medium temperature of the outlet-
When the temperature of the hot water tank becomes 2 ° C. or more, the system is switched to a system that circulates both the hot water tank 2 and the fan coil 6, and the motor valve 72 is gradually opened. Stop 72. Further, when the temperature difference deviates by ± 1 ° C. from this point, the motor valve 72 is adjusted again to control the temperature to about 0 ° C.
In this control, the motor valve 72 is opened when the temperature difference becomes large, and the motor valve 72 is gradually closed when the temperature difference becomes small.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and is included in the present invention even if there is a design change or the like without departing from the gist of the present invention. .

[0079]

As described above, hot water is supplied and heated using the solar hot water supply / heating device of the present invention, so that the heat collected by the solar heat is effectively used for heating without leaving any excess. be able to.

That is, according to the first aspect of the present invention, although solar heat is normally used only for hot water supply, when there is excess heat, the heat can be used for heating. Can be used. In particular, when solar heat is used for heating, the heating medium heated by the hot water in the hot water tank flows directly to the radiator for heating.Therefore, a heating device such as a heat pump is not necessarily operated, and indoor heating is performed only by solar heat. Can be covered. Therefore, effective utilization of solar heat can be achieved while minimizing energy consumption.

According to the second aspect of the present invention, when the temperature of the hot water in the hot water storage tank is low and the solar heat cannot be used for heating, the heating medium can be heated by the auxiliary heater. Can also be done.

According to the third aspect of the present invention, since underfloor heating can be performed using solar heat, effective use of heat can be achieved even when the temperature of surplus heat is relatively low.
As a result, the indoor heating effect can be enhanced.

According to the fourth aspect of the present invention, after the heating heat medium first flows into the indoor heating radiator to perform heat exchange,
Subsequently, since the heat flows to the radiator for heating below the floor to exchange heat, the solar heat can be used more effectively without waste.

According to the fifth aspect of the present invention, when necessary, the heat medium heated by the solar heat collector is passed directly to the radiator for heating so that heating can be performed. There is no need to do so, and solar heat can be used effectively for heating. In addition, since a conventional heat storage tank for heating is not required, cost can be reduced.

According to the invention of claim 6, the solar heat is used for heating only when the temperature of the heat medium of the solar heat collector is higher than the temperature of the heat medium in the hot water storage tank and higher than a predetermined temperature. As a result, reliable heating using solar heat can be performed.

According to the invention of claim 7, the solar heat can be effectively used for indoor heating, underfloor heating, or both indoor and underfloor heating.

According to the eighth aspect of the present invention, similarly to the fourth aspect of the present invention, after the heat medium first flows to the radiator for heating on the indoor side to perform heat exchange, subsequently, the heat medium for heating on the lower side of the floor is subsequently heated. Heat is exchanged by flowing to the radiator, so it is possible to heat the room at a high temperature and also to heat the floor under the low temperature, so that the solar heat can be used effectively without waste. .

According to the ninth aspect of the present invention, even when the temperature of the heat medium of the solar heat collector is low, underfloor heating can be performed using the heat medium, so that the solar heat can be more effectively used.

According to the tenth aspect of the present invention, by adjusting the flow rate of the heat medium flowing through the radiator for heating, the heat load on the radiator for heating can be adjusted, and the operation can be performed without lowering the temperature of the hot water storage tank so much. To be able to Furthermore, by circulating the heat medium through the radiator for heating, the temperature of the heat medium is lowered, and high-efficiency heat collection by the solar heat collector becomes possible.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of a solar hot water supply / heating device T1 according to a first embodiment of the present invention.

FIG. 2 is a system diagram showing a configuration of a solar hot water supply / heating device T2 according to a second embodiment of the present invention.

FIG. 3 is a system diagram showing a configuration of a solar hot water supply / heating device T3 according to a third embodiment of the present invention.

FIG. 4 is a system diagram showing a configuration of a solar hot water supply / heating device T4 according to a fourth embodiment of the present invention.

FIG. 5 is a solar hot water supply / heating device T according to the fourth embodiment.
4 is a system diagram showing a flow of a heat medium when solar heat is used for heating in FIG.

FIG. 6 is a system diagram showing a configuration of a solar hot water supply / heating device T5 according to a fifth embodiment of the present invention.

FIG. 7 is a system diagram showing a configuration of a solar hot water supply / heating device T6 according to a sixth embodiment of the present invention.

FIG. 8 is a system diagram showing a configuration of a solar hot water / hot water supply / room heating device T7 according to a seventh embodiment of the present invention.

FIG. 9 is a system diagram showing a configuration of a solar hot water supply / heating device T8 according to an eighth embodiment of the present invention.

FIG. 10 is a system diagram showing a modification of FIG. 9;

FIG. 11 is a system diagram showing a modification of FIG. 9;

FIG. 12 is a system diagram showing a configuration of a solar hot water / hot water supply / room heating device T9 according to a ninth embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 solar heat collector 2 hot water tank 3 hot water supply equipment 4 heat exchanger for heating water in hot water tank 5 heat exchanger for heating heat medium for heating 6,16,46 fan coil unit (radiator for heating) 7,8 three-way valve ( 9 Auxiliary heating means 24 Heating heater 33, 34, 35, 36 Three-way valve (Flow path switching means) 42, 43 Three-way valve (Heat medium circulation destination selecting means) 72 Motor valve (Flow control means) T1, T2, T3, T4, T5, T6, T7, T8, T
9 Hot water supply and heating system utilizing solar heat J0 Heat medium circulation system J1 Heat medium circulation system for hot water supply J2 Heat medium circulation system for heating M Building Y Underfloor space

Claims (10)

[Claims] 1. A solar heat collector, a hot water tank for storing hot water, a hot water supply facility using hot water in the hot water tank, a heat medium built in the hot water tank and heated by the solar heat collector, and an inside of the hot water tank A hot water storage tank water heating heat exchanger for exchanging heat with water, and a heating heat medium built in the hot water storage tank and exchanging heat between water in the hot water storage tank and a heating medium used for heating. A heat exchanger for heating,
A heating radiator for releasing heat received by the heating medium used for the heating to an external environment, and for heating the heating medium used for the heating when the temperature of the hot water in the hot water storage tank is equal to or lower than a predetermined value. Control means for disallowing circulation to the radiator and permitting the heat medium used for heating to flow to the heating radiator when the temperature of the hot water in the hot water tank exceeds a predetermined value. Characteristic solar hot water supply and heating system. 2. The heating radiator and the heat exchanger for heating a heating medium in a hot water storage tank are connected in parallel with each other via a three-way valve that performs at least a part of the function of the control means. The hot water supply and heating device utilizing solar heat according to claim 1, wherein an auxiliary heater for heating a heat medium used for heating is connected. 3. The solar hot water supply / heating device according to claim 1, wherein the heating radiator is installed under a floor of a building. 4. The heating radiator is installed in the room and under the floor of the building, and the heating medium flowing through the heating radiator on the indoor side flows to the heating radiator below the floor. 2. A radiator for a vehicle, wherein the radiators are connected in series.
Or the solar hot water supply / heating device according to 2 above. 5. A hot water tank for storing hot water, a hot water supply facility using hot water in the hot water tank, a hot water tank water heating heat exchanger built in the hot water tank, and a solar heat collector for collecting solar heat. The heat medium circulation system for hot water supply using solar heat, which circulates the heat medium between the heating medium and a heating heater that heats the heating medium by the heating means, and a heating radiator that releases the heat of the heating medium to the external environment A heating medium circulation system for circulating a medium, wherein a heating medium outlet side of the solar heat collector and a heating medium inlet side of the heating radiator are connected via a flow path switching unit. Connecting the heat medium inlet side of the solar heat collector and the heat medium outlet side of the heating radiator via flow path switching means, and switching between the two flow path switching means to connect the solar heat collector and the heating. And a control means for circulating a heat medium between the solar heat radiator and the heat radiator. Hot water supply and heating system. 6. The control means controls the flow path switching means for heating when the temperature of the heat medium of the solar heat collector is higher than the temperature of the heat medium in the hot water storage tank and is equal to or higher than a predetermined temperature. The hot water supply and heating device utilizing solar heat according to claim 5, wherein the heat medium is circulated between the radiator for use and the solar heat collector. 7. The heating radiator is installed in a room and under the floor of a building, respectively, and a heat medium can be circulated between the solar heat collector and at least one of the indoor and underfloor heating radiators. The hot water supply and heating device utilizing solar heat according to claim 5 or 6, wherein 8. A radiator for heating on the indoor side and a radiator for heating under the floor are connected in series, and a flow of the heat medium is set so that the radiator for heating on the indoor side is lower than the radiator for heating under the floor. The hot-water supply / heating apparatus using solar heat according to claim 7, wherein the hot-water supply / heating apparatus is arranged on the upstream side in the direction. 9. When the heating radiator is installed in a room and under the floor of a building, and a heat medium is circulated between the solar heat collector and the indoor heating radiator. And a heat medium circulation destination selection means for selectively selecting the case where the heat medium is circulated between the heating medium radiator and the underfloor heating radiator, wherein the control means controls the temperature of the heat medium of the solar heat collector. When the temperature is higher than the temperature of the heat medium in the hot water tank and equal to or higher than a predetermined temperature, the heat medium circulation destination selecting means is controlled to cause the heat medium to flow between the solar heat collector and the indoor heat radiator. When the temperature of the heat medium of the solar heat collector is lower than the temperature of the heat medium in the hot water tank and higher than the temperature of the underfloor space, the heat medium circulating destination selecting means is controlled to control the solar heat collector. The heat medium is circulated between the heater and the radiator for heating below the floor.
Or a solar hot water supply / heating device according to 6. 10. A solar heat collector, a heat medium circulating system for circulating a heat medium heated by the solar heat collector, a hot water storage tank for storing hot water, and a hot water supply facility using hot water in the hot water storage tank, A hot water supply heat medium circulating system that circulates a heat medium between the hot water tank water heating heat exchanger built in the hot water tank and the heat medium circulating system, and a heating radiator that releases heat to the external environment A heating medium circulating system for circulating a heating medium between the vessel and the heating medium circulating system; A hot water supply / heating device utilizing solar heat, characterized by that: