JPS6152554A - Heat collector - Google Patents

Abstract

PURPOSE:To prevent refrigerant evaporating capacity at a heat collector from lowering and an expansion valve from hunting by a structure wherein side plates protruding in the direction of the installation plane of the heat collector are provided on both the vertical end parts of the heat collector. CONSTITUTION:Side plates 7 and 8, which protrude in the direction of the installation plane of a heat collector 1, are provided on both the vertical end parts of the heat collector 1. The high temperature refrigerant gas compressed by a compressor 3 flows in a condenser 4 so as to heat the low temperature water sent by a pump 10 in order to store the resultant water with elevated temperature in a heat accumulator 11. The refrigerant liquefied by being deprived of the heat of condensation flows in a thermostatic expansion valve 5 so as to be reduced its pressure and flow in the heat collector 1 in order to be gasified through evaporation by depriving of solare heat and atmospheric heat and sent through an accumulator 2 back to the compressor 3. When the heat collector is installed near the wall surface of a building, the cold air lying between the heat collector 1 and the installation plane 12 is accelerated to descend by the duct effect of the side plates 7 and 8, resulting in enabling to prevent refrigerant evaporating capacity at the heat collector 1 from lowering. IN addition, when the speed of the descending cold air flowing between the heat collector 1 and the installation plane 12 stabilizes after its increase, the transition point of evaporation of refrigerant in the heat collector 1 also becomes nearly constant and consequently the temperature fluctuation of a temperature-sensing tube 6 attached near the outlet of the hat collector 1 also becomes smaller, resulting in enabling to prevent the thermostatic expansion valve 5 from hunting.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device which collects solar heat and atmospheric heat by applying a toto pump cycle to flow a refrigerant directly to a heat collector and evaporate the refrigerant.

Conventional technology A heat pump cycle has been put into practical use in which a refrigerant is flowed directly into a heat collector to collect solar heat while evaporating the refrigerant.

For example, a heat collection circuit that connects a heat collector, an accumulator, a compressor condenser, a thermostatic expansion valve, a heat exchanger that exchanges heat with the condenser, a pump, and a heat storage unit for heating hot water. There is a solar water heater that consists of a circuit, and the heat collector is generally installed on a well-ventilated roof or balcony facing south.

Problems to be Solved by the Invention However, considering the compatibility between the house and the heat collector, it is preferable to install the heat collector vertically near the wall of the house, but in this case, the wind speed passing through the heat collector decreases. However, there was a problem in that the refrigerant evaporation capacity of the heat collector decreased.

Furthermore, the temperature-type expansion valve installed in the heat collector is also prone to hunting due to a decrease in the passing wind speed and the influence of irregular cold air descending near the heat collector, causing liquid to return to the compressor. There was a problem that the reliability of the system components was reduced due to the increased risk of occurrence.

Means to Solve the Problems The present invention solves these conventional problems.When installing a heat collector that collects solar heat and atmospheric vents (＼) while evaporating refrigerant near the wall of a house, As a result, side plates protruding in the direction of the installation surface are provided at both ends of the heat collecting device in the longitudinal direction.

Effect With the above configuration, when the wind speed passing through the collector decreases due to the wind direction or wind speed of the outside air, the cooling air between the collector and the wall of the house is disposed with a side plate, which promotes the fall of cold air due to the duct effect. This prevents a decrease in the refrigerant evaporation capacity in the heat collector, improves the stability of the heat collector outlet temperature, and prevents hunting of the thermostatic expansion valve.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 is a heat collector that evaporates the refrigerant using solar heat and atmospheric heat; 2 is an accumulator; 3 is a compressor; It constitutes a thermal circuit. Reference numerals 7 and 8 denote side plates that protrude in the direction of the installation surface at both ends of the heat collector in the longitudinal direction. 9 is a heat exchanger and ion pump that absorbs the heat released from the refrigerant from the +jfJ C pseudo-condenser 4, and 11 is a heat storage tank, which constitutes a hot water heating circuit, and together with the heat collecting circuit, a solar heat collection device. It consists of

Next, the operation of the solar heat collecting device having the above configuration will be explained.

The high-temperature, high-pressure refrigerant gas compressed by the compressor 3 flows into the condenser 4, which heats and raises the temperature of the low-temperature water sent by the pump 10 of the hot water heating circuit, and stores it in the heat storage tank 11. On the other hand, the refrigerant that has been liquefied by being deprived of the heat of condensation flows into the thermostatic expansion valve 5, is depressurized, flows into the heat collector 1, absorbs solar heat and atmospheric heat, becomes evaporated, and returns to the compressor 3 through the accumulator 2. When the heat collector is installed near the wall of a house as shown in Fig. 3, the duct effect of the side plates 7.8 acts to promote the descent of cold air between the heat collector 1 and the installation surface 120, and the outside air wind speed increases. It is possible to prevent a decrease in refrigerant evaporation capacity in the heat collector 1 when there is no heat collector. Also, heat collector 1 and installation surface 1
2, the descending cold air velocity increases and becomes stable, and the refrigerant evaporation transition point (divided by 1) becomes almost constant, so the temperature change of the thermosensor tube 6 installed near the outlet of the heat collector 1 also increases. This also prevents the temperature-type expansion valve 5 from cumming.

Effects of the Invention The present invention reduces the wind speed passing through the collector by arranging side plates protruding in the direction of the installation surface at both longitudinal ends of the collector, which collects solar heat and atmospheric heat while evaporating refrigerant. Even if the duct effect of the side plate promotes natural convection between the heat collector and the installation surface, it has the effect of preventing a decrease in heat collection ability and also stabilizes the temperature at the outlet of the heat collector. It is possible to prevent the nonching phenomenon caused by the refrigerant flow rate control means, etc., and also prevent the liquid from returning to the compressor, which has the effect of improving the reliability of the system components.
Furthermore, based on the above-mentioned effects, it is also possible to install the collector I+ device perpendicularly to the wall surface of the house, which further improves the harmony between the heat collector and the house, and the effect is great. .

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a heat collector according to an embodiment of the present invention, and FIG.
The figure is a schematic diagram of a solar heat collector using the same collector, and Figure 3 is an actual layout diagram of the solar heat collector. 1... Heat collector, 5... Temperature type expansion valve,
6...Temperature-sensing tube, completed, 8...Side plate. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A heat collector that collects solar heat and atmospheric heat while evaporating refrigerant. Side plates protrude toward the installation surface at both longitudinal ends of the heat collector.