JPS6199060A - Heat collector - Google Patents

Abstract

PURPOSE:To permit the vertical installation of the heat collector, stabilize the transition point of evaporation of refrigerant and prevent the hunting of a temperature type automatic expansion valve by a method wherein a ventilating fan, located at the installation surface side of upper refrigerant conduit of the heat collector in which the refrigerant conduit is arranged horizontally to collect heat under evaporating the refrigerant from the lower part to the upper part thereof, is buried into the wall surface of a house. CONSTITUTION:Refrigerant gas, compressed by a compressor 3 and having high temperature and pressure, flows into a condenser 4 to heat low-temperature water by the condensing heat thereof and rise the temperature of the water, thereafter, store it into a heat accumulating tank 10. On the other hand, the refrigerant, deprived its condensing heat and liquefied, is flowed into the heat collector 1 after the pressure thereof is reduced by the temperature type automatic expansion valve 5 and deprives solar heat and atmospheric heat as it flows from the lower part to the upper part of the heat collector, thereafter, is evaporated and returned to the compressor 3 through the accumulator 2. The heat collector 1 is installed vertically near the wall surface and the ventilating fan 7 is buried into the heat collector installing surface 11 of the residence near the upper part or the outlet port side of the heat collector, therefore, the unstable movement of the transition point of evaporation of refrigerant in the heat collector may be prevented even in case there is no flow speed of atmosphere, the temperature change of a temperature sensitive tube 6 is reduced and the hunting of the automatic expansion valve 5 may be prevented, whereby the reliability of the system may be improved and operating efficiency may also be improved by the air speed of the fan 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a system that applies a heat pump cycle to collect solar heat and atmospheric heat while evaporating the refrigerant by flowing a refrigerant directly through a heat collector.

BACKGROUND OF THE INVENTION Conventionally, heat pump cycles have been put into practical use in which a refrigerant is flowed directly into a heat collector to collect solar heat and atmospheric heat while evaporating the refrigerant. That-
For example, it consists of a heat collection circuit that connects a heat collector, an accumulator, a compressor, a condenser, and a thermostatic automatic expansion valve, and a hot water heating circuit that includes a heat exchanger that exchanges heat with the condenser, a pump, and a heat storage tank. There are solar water heaters that utilize solar heat, 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 harmony between the house and the heat collector, it is desirable 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. There was a problem in that the refrigerant evaporation capacity of the heat collector was reduced, and the operating efficiency of the 7 stems was reduced. Furthermore, due to the decrease in the wind speed passing through the heat collector and the influence of irregular cold air descending near the heat collector, hunting is likely to occur in the temperature-type automatic expansion valve installed inside the heat collector, causing liquid to return to the compressor. There is a problem in that the reliability of system components is reduced due to increased risks.

Means for Solving the Problems The present invention solves these conventional problems by improving the harmony between the house and the heat collector, and when installing the heat collector near the wall of the house, the refrigerant conduit is placed horizontally. A ventilation fan is installed on the installation surface of the upper refrigerant conduit of a heat collector that collects solar heat and atmospheric heat while evaporating the refrigerant by flowing the refrigerant from the bottom to the top. By embedding the ventilation fan in the wall of the house, it is possible to install the heat collector vertically near the wall of the house, which increases the harmony between the house and the heat collector, and also embeds the ventilation fan in the vicinity of the upper refrigerant conduit, which is the exit side of the whole heat collector. This arrangement has the effect of stabilizing the refrigerant evaporation transition point, and as a result, hunting of the thermostatic automatic expansion valve is prevented.

EXAMPLE An example 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, 4 is a condenser that condenses the refrigerant, 5 is a thermostatic automatic expansion valve, and 6 is a thermosensitive tube that collects heat. It constitutes a circuit. Reference numeral 7 denotes a ventilation fan disposed on the installation surface side of the upper refrigerant conduit of the heat collector. Reference numeral 8 denotes a heat exchange product that absorbs heat released from the refrigerant from the condenser 4, 9 a pump, and 10 a heat storage tank, which constitutes a hot water heating circuit, and together with the heat collection circuit constitutes a solar heat collection device. are doing.

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, and uses the heat of condensation to heat and raise the temperature of the low-temperature water sent by the pump 9 of the hot water heating circuit, and stores it in the heat storage tank 10. On the other hand, the refrigerant that has been deprived of condensation ripeness and liquefied flows into the thermostatic automatic expansion valve 5, is depressurized, flows into the collector 1, and as it flows from the bottom to the top of the horizontal refrigerant conduit, absorbs solar heat and atmospheric heat and evaporates into gas, becoming an accumulator. 2 and returns to compressor 3. Figure 3 shows an example in which the ventilation fan 7 is embedded in the heat collector installation 11 of a house and the heat collector is installed vertically near the wall surface, but the ventilation fan is placed near the upper part on the outlet side of the heat collector refrigerant conduit. Because of this, even when there is no outside air wind speed around the house, it is possible to prevent the unstable movement of the refrigerant evaporation transition point due to the influence of cold air descending from the collector.As a result, a temperature sensing tube installed near the collector outlet can be used. 6 is also reduced, and hunting of the thermostatic automatic expansion valve 5 can be prevented. 'Furthermore, the refrigerant evaporation capacity of the heat collector 1 increases depending on the wind speed of the ventilation fan 7, thereby improving the operating efficiency of the system.

Effects of the Invention The present invention provides a ventilation fan that is installed on the installation surface of the upper refrigerant conduit of a heat collector that flows the refrigerant from the bottom to the top. It is possible to install a heat collector in a building, which has the effect of improving the harmony between the heat collector and the house. Furthermore, since the ventilation fan is placed near the upper refrigerant conduit on the outlet side of the collector, the refrigerant evaporation transition point of the collector can be stabilized even when the wind speed is very low near the wall of the house. This has the effect of preventing hunting of the temperature-type automatic expansion valve and preventing liquid return to the compressor, improving the reliability of system components, and improving system operating efficiency by increasing the wind speed of the ventilation fan. Furthermore, by combining the ventilation fan, which conventionally operated independently, with a heat collector, the above-mentioned effects can be obtained, and from the viewpoint of energy saving, this is a great practical effect.

FIG. 1 is a configuration diagram of a heat collector according to an embodiment of the present invention, and FIG.
The figure is a configuration diagram of a solar heat collection device using the same heat collector, and FIG. 3 is an actual layout diagram of the same heat collector.

1... Heat collector, 5... Temperature type automatic expansion valve, 6... Temperature sensing cylinder, 7... Ventilation fan.

Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A heat collector with a ventilation fan installed on the installation surface of the refrigerant pipes in the upper part of the collector, which collects solar heat and atmospheric heat while evaporating the refrigerant by flowing the refrigerant from the bottom to the top with the refrigerant pipes arranged horizontally. .