JPH0493556A - Solar heat-using system - Google Patents

Abstract

PURPOSE:To obtain the title system in which solar heat or external heat is effectively collected, by a method wherein both a heat exchanger externally exposed and a load part which is used as a condenser or an evaporator in a heat pump cycle, are connected with a flow way for a heat transfer medium in the heat pump cycle. CONSTITUTION:A heat exchanger 3 is externally exposed at a part on the surface of a case 6 acting as a pathway 2 for the working-fluid of heat medium. On the surface of the case 6, the whole of the surface except the place at which the heat exchanger 3 is installed is covered with a light-transmitting plate 1 and at the bottom part of the case 6, a heat-collecting plate 7 is provided. On a flown way 10 for a heat transfer medium in a heat pump cycle 5, a compressor 11 and an expansion device 12 are provided. In winter, when the air or water is heated on the side of load parts 4, the heat pump cycle 5 is operated so that the heat transfer medium is circulated in the direction of arrow marks 'a', and the heat exchanger 3 is used as an evaporator and the load parts 4 are used as condensers. At the night in summer, when the air is cooled, the heat pump cycle 5 is operated so as to be shown with arrow marks 'b', and the heat exchanger 3 is used as the condenser and is cooled by the external air, and the heat transfer medium in the heat pump cycle 5 is condensed. On the other hand, the load part 4 is used as the evaporator, and the air is cooled by the load part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solar heat utilization system for performing heating, hot water supply, cooling, etc. using solar heat.

[Prior Art] Conventionally, a system as shown in FIG. 5, for example, can be considered as a solar heat utilization system that utilizes solar heat. In the device shown in FIG. 5, the heat exchange section 3 is disposed in a sealed case 6, and the outer surface of the case 6 facing the heat exchange section 3 is made of a transparent plate l. A heat pump 5 is connected to a load section 4, which is a load. For example, when it is desired to heat the load section 4 side, the heat pump 5 is operated to receive solar heat and outside air heat through the heat exchange section 3, and then the heat pump 5 receives solar heat and outside air heat. Heat is sent to the load section 4 side to heat the load section 4 side.

In FIG. 5, 10 is a heat medium flow path of the heat pump 5, and 11
12 indicates a compressor, and 12 indicates a lij tensioning device. [Problems to be Solved by the Invention] In the conventional example shown in FIG. By inserting it, the solar heat transmitted through the translucent plate 1 is collected in the heat exchange part 3, and the inside of the case 6 is heated with outside air heat, so that the heat exchange part 3 is heated and the heat is collected by the so-called greenhouse effect. However, heat exchange section 3
is placed in the case 6, so the heat exchange part 3 due to direct sunlight due to the transmission loss when sunlight passes through the transparent plate 1.
There was a problem that the heat collection efficiency was poor.

The present invention was devised in view of the problems of the prior art described above, and its purpose is to provide a solar heat utilization system that is highly efficient in electrically heating solar heat and outside air heat.

[Means for Solving the Problems] The solar heat utilization system of the present invention includes a heat pump 5 in a heat medium fluid passage 2 whose surface through which the heat medium fluid flows is a translucent plate 1.
The heat exchange part 3 serving as the evaporator or condenser of the heat pump 5 is arranged so as to be exposed to the outside, and the heat exchange part 3 exposed to the outside and the load part 4 serving as the condenser or evaporator of the heat pump 5 are connected to each other. They are connected by a heat medium flow path 10, and by employing such a configuration, the problems of the conventional example described above are solved and the object of the present invention is achieved.

[Function] Therefore, when heating the load section 4 side, the heat exchange section 3 exposed to the outside becomes an evaporator, and the heat exchange section 3 exposed to the outside is directly heated by sunlight to collect heat. In addition, the heat medium fluid in the heat medium fluid passage 2 heated through the transparent plate 1 by solar heat or outside air heat is heated, and heat is collected in the heat exchange part 3 from the heat medium fluid heated to a high temperature due to the greenhouse effect. The heat pump 5 sends heat to the load section 4 side to heat it.

Also, load section 4r! When cooling s, the heat exchange section 3 acts as a condenser, and the heat is radiated directly into the atmosphere from the heat exchange section 3, and the heat in the heat medium fluid passage 2 cooled by sky radiation from the translucent plate 1 is The heat exchange section 3 is cooled by the medium fluid.

[Examples] The present invention will be described in detail below based on examples shown in the accompanying drawings.

FIG. 1 shows an embodiment of the present invention. The inside of the case 6 serves as a heat medium fluid passage 2 through which a heat medium fluid flows. A heat exchange part 3 is provided on a part of the surface of the case 6 (in the embodiment, the upper part of the surface) which serves as the heat medium fluid passage F&2, and the heat exchange part 3 is exposed to the outside. A portion of the surface of the case 6 other than the portion where the heat exchange section 3 is provided is a translucent plate 1 such as glass. A heat collecting plate 7 is provided at the bottom of the case 6 facing the translucent plate 1. The heat collecting plate 7 is, for example, a black metal plate. An outside air inlet 8 is provided at the end (lower end in the embodiment) of the case 6 that becomes the heat medium fluid passage 2, and the heat exchange section 3 of the case 6 is partially attached to the heat exchange section 3. An outlet 9 for air, which is a heat transfer fluid, is provided near the fins 3a, and a fan 20 directs outside air, which is a heat transfer fluid, to an outside air inlet 8.
The heat medium is sucked in and passed through the heat exchanger fluid passage 2 to the heat exchanger 3.
It exchanges heat with the water and flows out from the outlet 9. The heat exchange section 3 and the load section 4 are connected by a heat pump 5. That is, the heat exchange section 3 and the load section 4 are connected in the middle of the heat medium flow path 10 of the heat pump 5. Further, the heat medium flow path 10 of the heat pump 5 is further provided with a compressor 11 and an expansion device 12. As shown in FIG. 1, the load section 4 is a heat storage tank 4a provided with a heat exchange section, a heat exchange section provided with a fan 14, or the like. In the case of the heat storage tank 4a, water is placed in the heat storage tank 4a, and this water is heated to produce hot water, and this hot water can be directly used as hot water, or the hot water in the heat storage tank 4a can be used for other loads, e.g. It is used as a heat source for floor heating equipment, ceiling heating equipment, air conditioning equipment, etc.

Of course, a heat medium other than water may be placed in the heat storage tank 4a.

According to the present invention, when heating or hot water is to be supplied on the load section 4 side during winter or the like, the heat pump 5 is operated to flow the heat medium in the direction of arrow A in FIG. 1 to perform heat exchange. The section 3 is an evaporator and the load section 5 is a condenser, and the heat collected in the heat exchange section 3 is sent to the load section 4 by the heat pump 5 to heat the load section 4 side. here,
The heat exchange part 3 exposed to the outside is directly heated by sunlight to collect heat, and the air, which is the heat medium fluid in the heat medium fluid passage 2, which is heated through the transparent plate 1 by solar heat and outside air heat, is heated. The heat exchange section 3 collects heat from the heat medium fluid which has been heated to a high temperature due to the greenhouse effect, and the heat pump 5 sends the heat to the load section 4 side for heating. In this case, cool outside air is sent into the heat medium fluid passage 2 by the fan 20, heated by the solar heat and outside air heat that entered through the transparent plate 1, and sent to the heat exchange section 3. 1
The solar heat and outside air heat that have entered the heat medium fluid passage 2 are collected by the heat collecting plate 7 at the bottom of the heat medium fluid passage 2, thereby further heating the air within the heat medium fluid passage 2. The heated air exchanges heat with the fins 3a of the heat exchanger 3, heats the heat exchanger 3, and flows out from the outlet 9.

Next, a case of cooling the air conditioner at night during summer will be explained. That is, the heat pump 5 is operated as shown by the arrow in FIG. 2, and in this case, the heat exchange part 3 exposed to the outside serves as a condenser and is cooled by outside air, thereby condensing the heat medium of the heat pump 5. The load section 4 side serves as an evaporator, and the load section 4 performs cooling. At this time, the heat exchange section 3 serving as a condenser is not only exposed to the outside and directly cooled by the outside air, but also air that passes through the heat medium fluid passage 2 and is cooled by sky radiation from the translucent plate 1. It is also cooled by water to increase the cooling effect.

In the embodiments shown in FIGS. 1 and 2 described above, air is shown as the heating medium fluid flowing through the heating medium fluid passage 2, but
In other words, in FIGS. 3 and 4, the inside of the case 6 is partitioned by a partition 16 to form a circulation flow path containing antifreeze, which is a heating medium, and this circulation flow path is filled with a heat medium fluid. By operating the pump 15, the antifreeze liquid in the heat medium fluid passage 2, which is a circulation flow path, is forced to circulate. Of course, the antifreeze may be allowed to circulate within the heat medium fluid passage 2 by natural circulation without providing the pump 15. In addition, in this embodiment, the heat exchange section 3 is partially provided on the upper surface of the case 6 to the outside. The light-transmitting plate 1 is provided so as to be exposed, and is provided on most of the upper surface except for the portion where the heat exchange section 3 is provided. The attachment portion of the heat exchanger 3 to the case 6 is sealed in a water-tight manner to prevent antifreeze from leaking outside from the attachment portion of the heat exchanger 3.

In winter, when heating or hot water is to be supplied on the load section 4 side, the heat pump 5 is operated to flow the heat medium in the direction of arrow A in Fig. 3, and the heat exchange section 3 is used as an evaporator. The section 5 is used as a condenser, and the heat collected in the heat exchange section 3 is sent to the load section 4 by the heat pump 5.
It heats the sides. Here, the heat exchange part 3 exposed to the outside is directly heated by sunlight to collect heat, and the heat medium fluid in the heat medium fluid passage 2 heated by the solar heat 5 through the transparent plate 1 by outside air heat is used. The heat exchange section 3 collects heat from this heated liquid, and the heat pump 5 sends the heat to the load section 4 side for heating. In this case, the liquid whose temperature has decreased by exchanging heat with the load section 4 passes below the partition 16 of the case 6, flows again above the partition 16, and is heated by solar heat or outside air heat that has passed through the transparent plate 1. The heat exchanger 3 then flows into the heat exchanger 3.

In addition, when cooling the air at night during summer, the heat pump 5 is operated as shown by the arrow in Fig. 4, and in this case, the heat exchange section 3 exposed to the outside functions as a condenser and is cooled by the outside air. This acts to condense the heat medium of the heat pump 5, and the load section 4 side becomes an evaporator, and the load section 4 performs cooling. At this time, the heat exchange section 3 that serves as a condenser is not only exposed to the outside and directly cooled by the outside air, but also cooled by sky radiation from the translucent plate 1 as it flows through the heat medium fluid passage 2. The heat exchange section 3 is also cooled by this cooled liquid, thereby increasing the cooling effect.

In the embodiment shown in FIGS. 3 and 4 above, the partition plate 1
6 serves as an insulating partition between hot and cold water.

[Effects of the Invention] As described above, in the present invention, a heat exchange section serving as an evaporator or a condenser of a heat pump is provided externally in a heat medium fluid passage whose surface through which the heat medium fluid flows is a translucent plate. The heat exchange section exposed to the outside and the load section which becomes the condenser or evaporator of the heat pump are connected through the heat medium flow path of the heat pump, so when heating the load section side. The heat exchange part exposed to the outside serves as an evaporator, and the heat exchange part exposed to the outside is directly heated by sunlight to collect heat, and the heat transfer fluid is heated through a transparent plate by solar heat or outside air heat. It is possible to heat the heat medium fluid in the passage and send heat to the load part side using a bomb to collect heat from the heat medium fluid which has been heated to a high temperature due to the greenhouse effect at the heat exchange part.
In addition, when cooling the load section side, the heat exchange section acts as a condenser and heat is radiated directly into the atmosphere from the heat exchange section, and the heat in the heat medium fluid passage is cooled by sky radiation from the translucent plate. The heat exchange section can be cooled by a fluid medium, and a solar heat utilization system can be provided that is highly efficient in collecting solar heat and outside air heat.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention during heating, FIG. 2 is a circuit diagram of above-threshold cooling, FIG. 3 is a circuit diagram of another embodiment of the present invention during heating, and FIG. Ward is the same circuit diagram for cooling, No. 5
The figure is a circuit diagram of a conventional example, in which 1 is a transparent plate, 2 is a heat medium fluid path, 3 is a heat exchange section, 4 is a load section, 5 is a heat pump, and 10 is a heat medium flow path.

Claims (1)

[Claims] (1) A heat exchange section that serves as the evaporator or condenser of a heat pump is arranged so as to be exposed to the outside in a heat medium fluid passage whose surface through which the heat medium fluid flows is a translucent plate, and the heat exchanger that becomes the heat pump's evaporator or condenser is exposed to the outside. A solar heat utilization system characterized by connecting an exchange section and a load section serving as a condenser or evaporator of a heat pump through a heat medium flow path of the heat pump.