JPS61114053A - Heat collecting device - Google Patents

Abstract

PURPOSE:To increase the amount of collected solar heat during the sun shines and consequently improve the heat collection efficiency by a structure wherein some portion of the absorber fin of a heat collector is heat-retained by a transmission body and a casing. CONSTITUTION:During the sun shines, the refrigerant flowed through an inlet 8 into a heat collector collects the atmospheric heat by being evaporated by the heat of the outside air at the portion 3'A of a heat collecting fin 2. After that, the refrigerant flows in the portion 3'B, at which the heat collecting fin 2 is covered by a transmission body 10 and a casing 11 in order to collect the solar heat only. The collected heat is exchanged with the service hot water in a hot water storage tank 7. During no sunshine time, the heat collecting fin 2 collects the atmospheric heat at the portion 3'A, at which the outside air directly contacts with the heat collecting fin 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a solar heat collector using a heat pump circuit.

2. Description of the Related Art As shown in FIG. 3, a conventional heat collecting device of this kind includes a heat collector 3 by attaching heat collecting fins 2 to a heat collecting pipe 1, and a compressor 4, a compressor 4, A condenser 5 and an expansion valve 6 were connected in sequence, and the condenser 5 was built in a hot water tank 7.

Problems to be Solved by the Invention In this configuration, the heat collecting fins 2 of the heat collector a are in direct contact with the outside air, so as shown in FIG. However, the rate of increase is small (not much different) than when there is no solar radiation.

Heat collection amount Q is compressor heat amount Qcoms Atmospheric heat collection amount Qair
, solar heat collection amount Q, u. is the sum of Since the evaporation temperature in the heat collector 3 is lower than the outside air temperature, there is no heat radiation, and the amount of solar radiation irradiated to the heat collector 3 is collected as the solar heat collection amount Q gun. On the other hand, since the atmospheric heat collection amount Qair decreases, the heat collection amount Q does not increase significantly.

Furthermore, since the amount of heat collection did not change significantly, COP also showed a tendency not to increase significantly.

As described above, even if the amount of solar radiation increases, the amount of heat collected does not change and the COP does not improve.

Means for Solving the Problems The present invention solves these conventional problems.In heat collection operation during solar sunshine, as the amount of solar radiation increases, the amount of heat collected also increases, and the COP is also roughly improved, increasing efficiency. The purpose is to have good heat collection operation.

To achieve this objective, the present invention provides a heat collector comprising a part where the heat collecting fins are in direct contact with the outside air, and a part where the heat collecting fins are kept warm by a transparent body and a casing. It has been established.

Effect With this configuration, regardless of the amount of solar radiation, atmospheric heat is collected in the part of the heat collecting fin that is in direct contact with the outside air, and when the sun is shining, the part of the heat collecting fin that is kept warm by the transparent body and casing is collected. Because atmospheric heat is collected in the solar system, even if the amount of solar heat collected increases, the amount of atmospheric heat collected does not decrease. Therefore, more heat can be collected by the amount of solar heat collected, and the COP is also higher, allowing efficient operation.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. Note that the same members as in FIGS. 3 and 4 are given the same numbers.

In FIG. 1, the heat collector 3' has a part 3'-A where the heat collecting fins 2 are in direct contact with the outside air, and a part 3'-A where the heat collecting fins 2 are in contact with the transparent body 10.
and a portion 3-B covered by the casing 11. Then, compressor 4. Condenser 5. The expansion valve 6 is connected to constitute a heat collecting device.

In the above configuration, first, heat collection when there is solar radiation will be described.

The refrigerant flowing from the heat collector 8 evaporates in the part 3-A where the heat collecting fins 2 are in direct contact with the outside air, and the atmospheric heat Q′ai
Collect heat from r. Next, the refrigerant flows into the portion 3-B where the heat collecting fins 2 are covered with the transparent body 10 and the casing 11. Atmospheric heat cannot be collected in this part, but solar heat 0'Sun can be collected. Then, it flows into the compressor 4 from the collector outlet 9, is compressed, exchanges heat with the hot water in the hot water storage tank 7 in the condenser 5, passes through the expansion valve 6, and returns to the collector 3'. disaster, completing the cycle. The heat collection amount d increases in proportion to the increase in the amount of solar radiation compared to the heat collection amount Q of the conventional example. This is because even if the amount of solar heat collected Q'sun increases, the amount of atmospheric heat collected Q'aL i r does not decrease.

Furthermore, c op' also improves in proportion to the increase in solar radiation.

Next, a case where there is no solar radiation will be explained.

When there is no solar radiation, the heat collecting fins 2 collect only the atmospheric heat Q , , , at the part 3-A that is in direct contact with the outside air, but in the conventional example where the entire area is in contact with the outside air amount of heat collected Q
Compared to this, the amount of heat collected Q is slightly lower. However, cop'
is higher than that of conventional CoP, and the amount of heat collected increases significantly when the amount of solar radiation is 1 or more.

Effects of the Invention As mentioned above, according to the solar heat collecting device of the present invention, the heat collector consists of a part where the heat collecting fins are in direct contact with the outside air and a part where the heat collecting fins are kept warm by a transparent body and a casing. By installing this, during heat collection operation when there is solar radiation,
First, atmospheric heat is collected in the part of the heat collecting fin that is in direct contact with the outside air, and then solar heat is collected in the part of the heat collecting fin that is insulated by the transparent body and casing. Therefore, the amount of heat collected is the sum of the amount of atmospheric heat collected and the amount of solar heat collected, and as in the past, if the amount of solar heat collected increases, the amount of atmospheric heat collected will decrease, and the amount of heat collected will not increase significantly. will be resolved. Furthermore, as the amount of solar radiation increases, the CoP also improves, resulting in efficient heat collection operation.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the solar heat collecting device of the present invention, and Fig. 2 shows the amount of solar radiation - amount of heat collected, co
p characteristic diagram, Figure 3 is a configuration diagram showing a conventional solar heat collector, and Figure 4 is the solar radiation amount - heat collection amount, COP of the same solar heat collector.
It is a characteristic diagram. 2... Heat collection fin, 3... Heat collector, 3
-A...The part where the heat collecting fins are in direct contact with the outside air, 3-
B...The part where the heat collecting fins are kept warm by the transparent body and the casing, 4...Compressor, 5...Condenser, 6...Expansion valve , 10...Transparent body, 11...Casing. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 → Dan R amount

Claims (1)

[Claims] Heat collecting fins are attached to the heat collecting pipe, and the heat collecting fins are brought into direct contact with the outside air from the inlet of the heat collecting pipe to the outlet of the heat collector, and then from the arbitrary part to the outlet of the heat collector, A heat collecting device comprising: a heat collector that covers the heat collecting pipe and heat collecting fins with a transparent body and a casing; a compressor; a condenser; and an expansion valve.