JPS649545B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat collecting device that utilizes natural energy such as solar heat or atmospheric heat.

Conventional structure and its problems Conventionally, as shown in Fig. 1, a heat collection device using solar heat consists of a heat collection panel 1 consisting of a heat collection plate, heat insulating material, transparent glass, etc., and a heat collection system buried in a hot water storage tank 2. The exchanger 3 is connected with a plurality of heat medium circulation pipes 5. Reference numeral 4 denotes a heat medium circulation pump, which is interposed in the heat medium circulation pipe 5. Moreover, this heat medium circulation pump 4 is
It is controlled by a differential temperature thermostat 6 fixed to the inlet and outlet pipes of the heat collecting panel 1.

That is, when the heat collection panel 1 is exposed to sunlight, the heat medium circulation pump 4 is activated, and the heat medium whose temperature has risen flows into the heat exchanger 3 buried in the hot water storage tank 2, and the heated water and heat in the hot water storage tank 2 are exchanged. It is exchanged.

Such conventional solar heat collectors have the disadvantage that the heat collector panels are large in area and heavy.
Furthermore, as a matter of course, when there is no solar radiation, the heat collection effect is not performed, and an auxiliary heat source is essential, resulting in a drawback that double investment is required.

Purpose of the Invention The purpose of the present invention is to use a heat pump as a means of collecting solar heat, collect heat at a low temperature by flowing a refrigerant directly through the collector, and to improve the collection efficiency of solar heat and to enable heat collection from atmospheric heat. The aim is to obtain a self-contained heat collecting device by making the heat collector smaller and lighter and increasing the amount of heat collected.

Structure of the Invention In order to achieve the above object, the present invention includes a heat collection circuit consisting of a heat pump cycle in which a compressor, a condenser, an expansion valve, and a heat collector are connected in a ring, a hot water storage tank, a water circulation pump, and a water heater in a ring. The condenser and the water heater are held in a heat transfer relationship to constitute a heat collection device, and the compressor and the water circulation pump are connected to each other by a sunlight sensor, an evaporation temperature sensor, and a hot water temperature sensor. A manual heat collection operation switch is connected to the series circuit of the sensor and in parallel with the sunlight sensor.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 denotes a heat collection panel, which is composed of a Finch-Ube heat exchanger. 2 is a compressor, and an accumulator 3 for liquid separation is installed on the suction side. 4 is a condenser, which is, for example, a double-pipe heat exchanger, and causes refrigerant to flow through the inner pipes. Reference numeral 5 denotes an expansion valve, which is installed on the inlet side of the heat collecting panel 1. A discharge pipe (not shown) of the compressor 2 is connected to a condenser 4, and an outlet of the condenser 4 and an inlet of the expansion valve 5 are connected by a high-pressure pipe 14. The outlet of the expansion valve 5 is connected to the inlet of the heat collecting panel 1, and the outlet of the heat collecting panel 1 and the suction side of the compressor 2 are connected by a low pressure pipe 15. As mentioned above, the compressor 2, condenser 4, high pressure pipe 14, expansion valve 5, heat collection panel 1,
A heat pump cycle 6 is configured in which the low pressure piping 15 and the accumulator 3 are connected in this order in an annular manner.

7 is a hot water storage tank, 8 is a water circulation pump, and 9 is a water heater, in which hot water flows through the outer pipe of the double-pipe heat exchanger. The hot water storage tank 7, the water circulation pump 8, and the water heater 9 are sequentially connected via a circulation pipe 16 to form a water heating circuit 10.

Reference numeral 11 denotes a heat collector unit, which is composed of a heat collecting panel 1 and an expansion valve 5. 12 is a heat exchange unit which is composed of a compressor 2, a condenser 4, a water heater 9, and a water circulation pump 8. 13 consists of a hot water storage tank 7 which is insulated with a hot water storage unit.

Next, heat collection operation control will be explained with reference to FIG. 1
7 is an on/off switch. Reference numeral 18 denotes a sunlight sensor made of a phototransistor, which is attached to a location that receives sunlight, such as the exterior surface of the heat collector unit 11. Reference numeral 19 denotes an evaporation temperature sensor made of a thermistor or the like, which is fixed to the inlet pipe of the heat collecting panel 1. Reference numeral 20 denotes a hot water temperature thermostat consisting of a thermistor, which is fixed to the surface of the hot water storage tank 7. A high pressure switch 21 is connected to the discharge pipe of the compressor 2. 2' is the motor of compressor 2,
8' is a motor for the water circulation pump 8, and these compressor motor 2' and water circulation pump motor 8' are operated by an operation switch 17, a sunlight sensor 18, an evaporation temperature sensor 19, a hot water temperature sensor 20, and a pressure switch 21.
connected to a series circuit. 22 is a manual operation switch connected in parallel with the sunlight sensor 18.

Next, its effect will be explained. First, in the case of automatic operation, when the operation switch 17 is turned on, the sunlight sensor 1
8 detects brightness equal to or higher than the set lux, and when the hot water temperature sensor 20 is lower than the set value, the compressor 2 and the water circulation pump 8 are activated to start heat collection operation. That is, the high temperature, high pressure discharged refrigerant gas compressed by the compressor 2 flows into the condenser 4. Here, the water heater 9, which is in a heat transfer relationship, radiates heat to the flowing hot water, causing it to condense and liquefy. The condensate refrigerant passes through the high pressure pipe 14,
It reaches the expansion valve 5, and as it passes through the expansion valve 5, it is depressurized, becomes low temperature and low pressure, flows into the heat collecting panel 1, absorbs heat from the sun and atmospheric heat, and evaporates into gas. The gaseous refrigerant evaporated in the heat collecting panel 1 passes through the low pressure pipe 15 and is sucked into the compressor 2 again from the accumulator 3. On the other hand, the hot water in the hot water storage tank 7 is sent to the water heater 9 by the action of the water circulation pump 8, and as mentioned above, it is heated by the heat of condensation of the refrigerant and its temperature rises.
It returns to the hot water tank 7 again. After the heat collection operation starts, if hot water is not sent to the water heater 9 due to a failure of the water circulation pump 8, etc., the discharge pressure gradually increases because the discharged gas refrigerant does not radiate heat in the condenser 4, and the compressor 2 The pressure switch 21 attached to the discharge pipe is activated to open the contact and stop the heat collection operation. Further, even if the evaporation temperature sensor 19 is lower than the set temperature after a predetermined time after the start of the heat collection operation, the contact is opened and the heat collection operation is stopped. As the heat collection operation continues, when the hot water in the hot water storage tank 7 reaches the set temperature, the hot water temperature sensor 20 opens a contact and stops the heat collection operation. However, when hot water from the hot water storage tank 7 is used and low-temperature hot water is supplied to the hot water storage tank 7, the hot water temperature sensor 20 closes the contact again and restarts the heat collection operation. However, when the brightness falls below the set value of the sunlight sensor 18, the contact point of the sunlight sensor 18 opens and the heat collecting operation is stopped.

During manual operation, the above-mentioned heat collection operation is performed by turning on the manual heat collection operation switch 22 connected in parallel with the sunlight sensor 18.

Effects of the Invention According to the present invention, by using a heat pump for the heat collection operation and controlling the heat collection operation using a sunlight sensor and an evaporation temperature sensor, heat collection operation during the day and heat collection at a low evaporation temperature can be achieved. By preventing the operation, efficient heat collection operation can be carried out.

In addition, by connecting a manual heat collection operation switch in parallel with the sunlight sensor, it is possible to operate heat collection outside of the sunshine hours, increase the amount of heat collection, and minimize the need for auxiliary heat sources.

By collecting heat from solar heat and atmospheric heat, heat collectors can greatly increase the amount of heat collected per area, making the heat collector smaller and lighter, easing restrictions on installation, and reducing installation work. This has the effect of simplifying the process.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a conventional heat collection device, FIG. 2 is a configuration diagram of a heat collection device showing an embodiment of the present invention, and FIG. 3 is an operation control circuit diagram of the same device. 1... Heat collection panel, 2... Compressor, 4... Condenser, 5... Expansion valve, 7... Hot water storage tank, 8... Water circulation pump, 9... Water heater, 17... Operation switch, 18... Sunshine sensor, 19... Evaporation temperature sensor, 20... Hot water temperature sensor, 21... Pressure switch, 22... Manual heat collection operation switch.

Claims (1)

[Claims] 1 Compressor, condenser, expansion valve, heat collector (evaporator)
a refrigerant heat collection circuit formed by connecting a hot water storage tank, a water circulation pump, and a water heater in a ring, and a water heating circuit formed by connecting a hot water storage tank, a water circulation pump, and a water heater in a ring, and the condenser and water heater are held in a heat transfer relationship to collect heat. A sunlight sensor that connects the compressor and the water circulation pump to the thermal device and connects the contacts when detecting brightness, an evaporation temperature sensor that opens the contacts when the evaporation temperature becomes low, and a hot water temperature sensor that opens the contacts when the water temperature becomes high. A heat collection device which is controlled by connecting sensors in series and by providing a manual heat collection operation switch in parallel with the sunlight sensor.