JPS58182068A - Air conditioner utilizing underground water - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a heating and cooling device using groundwater, and relates to a heating and cooling device for agricultural use,
The present invention provides a heating and cooling device that can be advantageously used for winter heating and summer cooling of greenhouses for domestic use.

Conventionally, a common method for heating this type of greenhouse is to heat greenhouse heating water that circulates through heat radiation piping installed inside the greenhouse with a heavy oil boiler installed outside the greenhouse.

In the case of this heating method using a heavy oil boiler, fuel costs have increased with the recent rise in oil prices, making it extremely disadvantageous in terms of cost, and there are also drawbacks such as the risk of fire.

In order to solve this problem, the inventor of the present invention supplies the groundwater that has been pumped up from underground to the endothermic side of the heat pump, and converts the heat medium of the heat pump, such as freon, into expanded air (e Then, this expanded and vaporized heat medium is compressed and liquefied on the heat radiation side, and the heat radiation at that time heats the greenhouse water that is circulated and supplied to the heat radiation 11111 of this heat pump, and the pumped We have developed a heating method for greenhouses in which groundwater is returned underground, and the present invention improves this method so that it can be heated and cooled without ice.

The device of the present invention basically consists of a heat pump system as described below, a groundwater circulation system and a heating/cooling water circulation system that exchange heat with the heat pump, and a switching device for switching between heating and cooling.

The heat pump is equipped with 11 evaporators that absorb heat from the outside, and one heat pump can be used in combination with two or more as appropriate.

On the other hand, in a block sewage circulation system, groundwater is pumped up from underground by a pump and then returned to the ground through the heat exchange section of the heat pump. During heating, this groundwater is pumped into the evaporator V described above. The temperature of the refrigerant passing through the evaporator is increased by exchanging heat with the refrigerant, and during cooling, the temperature of the refrigerant passing through the condenser is lowered by exchanging heat with the refrigerant in the condenser. There is.

On the other hand, in the cooling/heating water system, the cooling/heating water is circulated between the greenhouse piping and the heat exchange section of the heat pump by a circulation pump, but during heating, it is used for heat exchange with the refrigerant in the condenser mentioned above. The temperature of the cooling/heating water is increased by the VC, and during cooling, the VC lowers the temperature of the cooling/heating water by exchanging heat with the evaporator.

The water flow switching operation during heating and cooling in the above-mentioned groundwater circulation system and air-conditioning river water circulation system #, VC is carried out by a heating-cooling switching device such as a three-way pulp.

The present invention will be explained below with reference to embodiments shown in the drawings.

In Fig. 1, (1), (1',) indicate the refrigerant circulation paths of heat pumps with different heat exchangers, and either or both heat pumps can be activated and used depending on the desired heat exchanger. However, it is also possible to use a combination of three or more heat pumps.

Refrigerant circulation path (1) (1') I/C of this heat pump
Now, to explain the operation during cooling, the refrigerant has a pressure of m
When the refrigerant is compressed by ffl (2) and condensed by the condenser (3), heat of condensation is generated, and the refrigerant temperature rises to, for example, about 110°C. On the other hand, the water for heating and cooling the greenhouse (4) is supplied by the circulation pump (9).
), it enters the heat pump from the inlet (4-A) at an inlet temperature of 40°C, is heated to 45°C by heat exchange with the refrigerant in the condenser (3), and is sent into the greenhouse from the outlet (4-B). The refrigerant, whose temperature has dropped to 40°C through heat exchange with the cooling and heating water (4), rapidly expands through the expansion valve (5) and begins to expand and vaporize, entering the evaporator (6) at a temperature of 0 to 5°C. On the other hand, groundwater (8) #man1'' (8-A) pumped up from underground by a water pump (7) enters the heat pump at an inlet temperature of 17℃, and the refrigerant is heated to 12℃ by heat exchange in the evaporator (6). The groundwater is heated to ~15°C to promote its evaporation, and the temperature of the groundwater is lowered to 15°C.
) will be buried underground again.

? The vaporized refrigerant heated to 12 to 15°C in the A'i filter (6) is returned to the compressor (2).

During cooling, the greenhouse cooling/heating water (4) comes into contact with the heat pump's evaporator (6) using the three-sided pulp (10) and is cooled by heat exchange with the refrigerant (the refrigerant temperature rises). , the father groundwater (8) is extracted from the heat pump condenser (
3) and cools the refrigerant by heat exchange with the refrigerant here (the temperature of the groundwater will rise) (11) indicates a solenoid valve.

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[Brief explanation of drawings]

FIG. 1 is a piping system diagram showing an embodiment of the present invention. 2・・・・・・・・・・・・Compressor 3・・・・・・・・・・・・Condenser 4・・・・・・・・・Water for heating and cooling 6・・・・・・・・・・・・Evaporator 8・・・・・・・・・・・・Groundwater 10・・・・・・・・・Mikata valve 6-

Claims (1)

[Claims] (1) A heat pump system equipped with a refrigerant compressor, a refrigerant condenser, and a refrigerant evaporator in the refrigerant circulation system, and a heat pump system that exchanges heat with the evaporator or condenser of the heat pump to provide heat to the refrigerant or refrigerant. A groundwater circulation system that pumps up groundwater from underground and returns it to the ground, and heat exchange between the heat pump's condenser or evaporator and the cooling/heating water condenser at the same time as the i! A groundwater utilization system characterized by being equipped with a switching device for switching between the heating operation that performs A and the cooling operation that simultaneously exchanges heat with the groundwater condenser and the cooling and heating water evaporator. Air conditioning equipment.