JPH0418213B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air conditioning system that utilizes large-scale natural water, such as groundwater, as a high or low heat source.

[Conventional technology]

While the temperature on the ground varies greatly depending on the season, the temperature of groundwater remains almost constant, and a temperature difference occurs between the groundwater and the surface as the seasons change. It is common practice to pump such groundwater up to structures such as buildings on the ground and use it as a heat source.

[Problem that the invention seeks to solve]

However, even in areas with abundant groundwater, pumping of groundwater may be regulated to prevent ground subsidence. In such cases, groundwater is pumped above ground using, for example, a small-diameter well.
This amount of groundwater only has enough heat to power one household, and even if it were to be used as a heat source for large-scale buildings or factories, it would not be enough.

On the other hand, for example, heat pump-type air-conditioning equipment or hot water heating equipment is used for cooling and heating equipment such as above-ground building equipment. This would require equipment, and in areas where groundwater is abundant, would mean wasting the groundwater heat source. In other words, if pumping of groundwater is restricted, the heat of the groundwater cannot be effectively utilized on a large scale for above-ground building equipment.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned problems, and its purpose is to solve the problem described above, and its purpose is to solve the problem even when pumping up natural water on a large scale, such as groundwater, is restricted.
Large-scale use of natural water heat as a heat source,
The purpose of the present invention is to provide a small-capacity heating and cooling system.

[Means for solving problems]

In order to achieve the above object, the first invention forms a cooling cycle system by a compressor, a condenser, a liquid receiver, an expansion valve, and an evaporator, and the evaporator side circulation waterway in which the evaporator is disposed as a part. A common air conditioner or fan coil unit is installed in the middle of the condenser side circulation waterway in which the condenser is installed as a part, and a common air conditioner or fan coil unit is installed in the middle of the evaporator side circulation waterway and the condenser side circulation waterway. By opening and closing the cold water valve and hot water valve, the cold water in the evaporator side circulation waterway or the hot water in the condenser side circulation waterway is supplied to the air conditioner or fan coil.
In a heating and cooling system that conducts air conditioning and heating by leading to a unit, a heat collecting and discharging section is installed in the circulation waterway on the evaporator side to exchange heat with large-scale natural water as a high heat source or a low heat source.

In the second invention, a cooling cycle system is formed by a compressor, a condenser, a liquid receiver, an expansion valve, and an evaporator, and the evaporator-side circulation waterway in which the evaporator is disposed as a part and the condenser are disposed as a part. A common air conditioner or fan coil unit is installed in the middle of the condenser side circulation waterway, and a cold water valve and a hot water valve are installed in the middle of the evaporator side circulation waterway and the condenser side circulation waterway, respectively. In an air-conditioning system that performs air conditioning by guiding cold water in the evaporator-side circulation channel or hot water in the condenser-side circulation channel to an air conditioner or fan coil unit by opening and closing the evaporator-side circulation channel and condenser-side circulation channel. Along the way, a heat extraction and radiation section that exchanges heat with large-scale natural water as a high heat source or a low heat source is commonly installed via a switching valve for connecting the heat extraction and radiation section, and the evaporator side circulation channel and condensing Switching valves are provided in the middle of the vessel side circulation waterway to communicate and cut off the cooling water or hot water to the heat extraction/dissipation section.

[Action of the invention]

According to the first invention, during cooling, the cold water valve is open and the hot water valve is closed, and there are the following two cases.

The cooling water in the evaporator side circulation waterway, whose temperature has risen due to heat obtained by cooling indoor air with an air conditioner or fan coil unit, is cooled by large-scale natural water (low heat source) in the heat extraction and radiation section. Then, the heat of evaporation is removed from the air in the evaporator of the cooling cycle system, and the air is cooled down, and the air is circulated again to the air conditioner or fan coil unit.

If the cooling load of the air conditioner or fan coil unit is smaller than the desired load, it simply passes through the evaporator and is cooled by large-scale natural water (low heat source) in the heat extraction/dissipation section (mid-season/cooling). .

During heating, the cold water valve is closed, the hot water valve is open, and the cooling water in the evaporator side circulation channel is
In the evaporator of the cooling cycle system, heat is taken away by the evaporation of the refrigerant and the temperature becomes low, but it is warmed by large-scale natural water (high heat source) in the heat extraction and radiation section. Therefore, the evaporation efficiency of the refrigerant in the evaporator is improved. On the other hand, as the refrigerant evaporates in the evaporator of the above-mentioned cooling cycle system, the refrigerant condenses in the condenser, and the hot water in the circulation waterway on the condenser side is heated and warmed by the air conditioner or fan.
Circulate to coil unit.

According to the second invention, during cooling, the cold water valve is open and the hot water valve is closed, and there are the following three cases.

Open the switching valve installed in the evaporator side circulation waterway, close the switching valve installed in the condenser side circulation waterway, and connect the heat extraction and radiation part so that the heat extraction and radiation part communicates with and is arranged in the condenser side circulation waterway. When the switching valve is switched; The water in the condenser side circulation channel becomes high temperature as heat is released by condensing the refrigerant in the condenser of the cooling cycle system. heat source). Therefore, the cooling efficiency of the condenser is improved. On the other hand, in response to the heat released in the condenser of the cooling cycle system, the refrigerant evaporates in the evaporator, and the cooling water in the circulation waterway on the evaporator side is cooled by removing heat, and is cooled in the air conditioner or fan coil unit. circulates.

When the switching valves installed in the evaporator side circulation waterway and the condenser side circulation waterway are closed, and the switching valve for connecting the heat extraction and radiation part is switched so that the heat extraction and radiation part is communicated with and arranged in the evaporator side circulation waterway; The cooling water in the evaporator side circulation waterway, whose temperature has risen due to heat obtained by cooling indoor air with an air conditioner or fan coil unit, is cooled by large-scale natural water (low heat source) in the heat extraction and radiation section. Then, the heat of evaporation is removed and cooled in the evaporator of the cooling cycle system, and the air is circulated again to the air conditioner or fan coil unit.

Close the switching valves installed in the evaporator side circulation waterway and the condenser side circulation waterway, switch the switching valve for connecting the heat extraction and radiation part so that the heat extraction and radiation part is connected and arranged in the evaporator side circulation waterway, and connect the air conditioner or When the cooling load of the fan coil unit is smaller than the desired load (mid-term/cooling); the cooling water simply passes through the evaporator and is cooled by large-scale natural water (low heat source) in the heat extraction/dissipation section.

During heating, the cold water valve is closed and the hot water valve is open, and there are three cases:

Close the switching valve installed in the evaporator side circulation waterway, open the switching valve installed in the condenser side circulation waterway, and connect the heat extraction and radiation part so that the heat extraction and radiation part communicates with and is arranged in the evaporator side circulation waterway. When the switching valve is switched; Water in the evaporator side circulation channel is in the evaporator of the cooling cycle system, and heat is removed by the evaporation of the refrigerant and the temperature becomes low. (high heat source). Therefore, the evaporation efficiency of the refrigerant in the evaporator is improved. On the other hand, as the refrigerant evaporates in the evaporator of the above-mentioned cooling cycle system, the refrigerant condenses in the condenser, and the hot water in the circulation waterway on the condenser side is given heat and warmed, and the hot water in the air conditioner or fan coil unit is heated. circulates.

When the switching valves installed in the evaporator side circulation waterway and the condenser side circulation waterway are closed, and the switching valve for connecting the heat extraction and radiation part is switched so that the heat extraction and radiation part is communicated with and arranged in the condenser side circulation waterway; Air conditioning Heat is removed by heating the outside air with a fan coil unit or fan coil unit, and the hot water in the condenser side circulation waterway whose temperature has dropped is warmed by large-scale natural water (high heat source) in the heat extraction and radiation section. It is warmed by heat of condensation in the condenser of the cooling cycle system, and then circulated again to the air conditioner or fan coil unit.

Close the switching valves installed in the evaporator side circulation waterway and the condenser side circulation waterway, switch the switching valve for connecting the heat extraction and radiation part so that the heat extraction and radiation part is communicated with and arranged in the condenser side circulation waterway, and connect the air conditioner or When the cooling load of the fan coil unit is smaller than the desired load; hot water simply passes through the condenser and is heated by large-scale natural water (high heat source) in the heat extraction and radiation section.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a heating and cooling system using large-scale natural water according to an embodiment of the first invention.

In FIG. 1, 1 is a compressor that compresses a gaseous refrigerant, and 2 is a condenser, which cools and liquefies the gaseous refrigerant compressed by the compressor 1. 3 is a liquid receiver, 4 is an expansion valve, and 5 is an evaporator, which converts liquid refrigerant into gas refrigerant. The compressor 1, condenser 2, liquid receiver 3, expansion valve 4, and evaporator 5 are sequentially arranged in the refrigerant circuit 6,
It forms a cooling cycle system.

7 is an evaporator side circulation waterway, and along the way there are water pumps 9,
An evaporator 5 is interposed. The evaporator side circulation waterway 7 branches into two cold waterways at point A, and one of the cold waterways 7A has a 1A valve (chilled water valve) 10A, a fan coil unit 14A,
A 3rd A valve (cold water valve) 12A is installed in sequence, and a 1B valve (cold water valve 10B, fan coil unit 1) is installed in the other cold water channel 7B.
4B and 3rd B valves (chilled water valves) 12B are successively installed, and merge into one cold water channel 7A at point B. Further, a branch cold water channel 7C having a bypass valve 7D branches from the other cold water channel 7B at point C,
The branched cold water channel 7C joins one of the cold water channels 7A at point D.

The heat extraction/dissipation coil 8 described above has a plate-type structure (shown in Figure 3), is installed in the screen 8A shown in Figure 2 and installed in underground water, and is connected to the ground water as a high heat source or a low heat source. give and receive. The material for the screen 8A and heat extraction/dissipation coil 8 may be copper, aluminum, etc. depending on the nature of water and soil.
Iron etc. are selected.

Reference numeral 15 denotes a condenser side circulation waterway, in which a hot water pump 16 and a condenser 2 are sequentially installed.
The condenser side circulation waterway 15 branches into two hot waterways at point E, and one of the hot waterways 15A has a second A valve (hot water valve) 11A, a fan coil unit 14A, and a fourth A valve ( The hot water valve) 13A is successively installed, and the other hot water water channel 15
B has the 2nd B valve (hot water valve) 11B,
A fan coil unit 14B and a 4th B valve (hot water valve) 13B are installed in sequence, and merge into one of the hot water channels 15A at point F. The fan coil units 14A and 14B cool the indoor air using the cooling water that has passed through the evaporator 5 or the hot water that has passed through the condenser 2.

A hot water supply circulation channel 17 supplies heat generated in the condenser 2 to a hot water storage tank 18, and is circulated by a hot water pump 19. A cooling water channel 20 cools hot water whose temperature has increased due to the heat released by the condenser 2 in a cooling tower 20A.

Next, the operation of the embodiment of the first invention will be explained.

Figure 4 shows the conditions during summer and cooling.

In the figure, the 1st A valve 10A, the 3rd A valve 12A, the 1B valve 10B, and the 3rd B valve 12B.
is open. 2nd A valve 11A, 4th A valve 13A, 2nd B valve 11B, 4th B valve 13
B, bypass valve 7D is closed. Therefore,
The evaporator side circulation waterway 7 is in communication with the fan coil units 14A, 14B, and the condenser side circulation waterway 15 is in a blocked state.

In this case, fan coil unit 14A,
The cooling water in the evaporator side circulation channel 7, whose temperature has increased due to the heat obtained by cooling the indoor air in 14B (for example, from 8°C to 18°C), is kept at a constant temperature by the heat extraction and radiation coil 8, as shown by the dotted line. It is cooled down to 16°C by underground water (14°C), and further cooled to 8°C by removing the heat of evaporation in the evaporator 5 of the cooling cycle system.
and again, fan coil unit 14
Return to A, 14B and cool the indoor air. This cycle is repeated.

Therefore, the fan coil unit 14A,1
The cold water of the evaporator side circulation waterway 7 supplied to 4B,
Since cooling is performed not only by the evaporator 5 of the cooling cycle system but also by underground water (a low heat source), the amount of temperature drop of the cold water in the evaporator 5 can be small. Therefore, the amount of evaporation of the refrigerant in the evaporator 5 is also reduced, and the capacity of the cooling cycle system can be reduced.

Figure 5 shows the state during the intermediate period/cooling period.

In the figure, the 1st A valve 10A, the 3rd A valve 12A, the 1B valve 10B, and the 3rd B valve 12B.
is open. 2nd A valve 11A, 4th A valve 13A, 2nd B valve 11B, 4th B valve 13
B, bypass valve 7D is closed. Therefore,
The evaporator side circulation waterway 7 is in communication with the fan coil units 14A, 14B, and the condenser side circulation waterway 15 is in a blocked state.

In this case, fan coil unit 14A,
Effective when the cooling load of 14B is smaller than the desired load, the cooling water can be cooled by the heat extraction and radiation coil 8 placed in underground water (low heat source) by simply passing it through the evaporator 5 without operating the cooling cycle system. I can do it.

Figure 6 shows the conditions during winter and heating.

In the figure, the 1st A valve 10A, the 3rd A valve 12A, the 1B valve 10B, and the 3rd B valve 12B.
is closed. 2nd A valve 11A, 4th A valve 13A, 2nd B valve 11B, 4th B valve 13
B, bypass valve 7D is open. Therefore,
The condenser side circulation waterway 15 is in communication with the fan coil units 14A, 14B, and the evaporator side circulation waterway 7 is in a blocked state. In this state, the heat extraction and radiation coil 8 is interposed in the middle of the evaporator side circulation waterway 7.

In this case, the hot water in the condenser side circulation waterway 15 receives the condensation heat of the refrigerant in the condenser 2 of the cooling cycle system and becomes high temperature, and the hot water with that heat is supplied to the fan coil units 14A and 14B. , the cycle is repeated (reverse return method). On the other hand, in response to the heat released in the condenser 2 of the cooling cycle system, the refrigerant evaporates in the evaporator 5, and the cooling water in the evaporator side circulation channel 7 is deprived of heat and cooled.
It is heated by a heat extraction and radiation coil 8 installed in groundwater (high heat source).

Therefore, in winter and during heating, underground water (high heat source)
The temperature of the cooling water in the evaporator side circulation waterway 7 that has received heat from the ground becomes higher than the ground temperature,
The heat transfer of the heat of evaporation of the refrigerant in the evaporator 5 increases, and the evaporation efficiency improves. Therefore, the efficiency of heat transfer in the cooling cycle system increases, and the amount of heat dissipated in the condenser 2 increases. Therefore, the temperature of the hot water in the condenser side circulation waterway 15 increases, and the heating efficiency of the fan coil units 14A and 14B can be improved. Furthermore, this means that the capacity of the cooling cycle system can be smaller in order to obtain the same heating effect.

According to the above configuration, during summer and air conditioning,
The cooling water in the evaporator side circulation waterway 7, whose temperature has increased due to the heat obtained by cooling the indoor air with the fan coil units 14A and 14B, is cooled by underground water in the heat extraction and radiation coil 8, and is then transferred to the fan coil unit 14A and 14B. Units 14A and 14B can be cooled. Therefore, the capacity of the cooling cycle system can be reduced, and only the heat from underground water can be used as a low-temperature heat source without having to pump the underground water up to structures such as buildings above ground.

Furthermore, during winter and during heating, the temperature of the cooling water in the evaporator side circulation channel 7 becomes relatively high compared to the temperature on the ground due to underground water (high heat source). Therefore, as described above, the amount of heat dissipated in the condenser 2 increases, the temperature rise in the condenser side circulation waterway 15 increases, and the fan coil units 14A, 14B can be heated. Therefore, the heat alone can be used as a high heat source without pumping groundwater up to structures such as buildings above ground.

In short, the heat of the groundwater, which is in a high and low temperature state with respect to the fluctuating temperature on the ground, is picked up by the heat extraction and radiation coil 8, and is collected by the evaporator side circulation channel 7 or the condenser side circulation channel 15.
It is then directly or indirectly conveyed to the fan coil units 14A and 14B for heating and cooling. Such groundwater does not need to be pumped up to structures such as buildings on the ground, and only its heat can be used as a low- or high-heat source. As a result,
For example, even when pumping up large-scale natural water such as groundwater is restricted, the heat of groundwater can be used on a large scale as a heat source, and as a result, the capacity of cooling cycle equipment can be reduced.

FIG. 2, FIG. 3, and FIG. 7 show an embodiment of the second invention.

In the figure, 1' is a compressor that compresses gaseous refrigerant;
A condenser 2' cools and liquefies the gaseous refrigerant compressed by the compressor 1'. 3' is a liquid receiver, 4' is an expansion valve, and 5' is an evaporator, which converts liquid refrigerant into gas refrigerant. The above compressor 1', condenser 2', liquid receiver 3',
An expansion valve 4' and an evaporator 5' are sequentially arranged in a refrigerant circuit 6' to form a cooling cycle system.

Reference numeral 27 denotes an evaporator side circulation waterway, in which a switching valve 22 for connecting a second heat extraction and radiation part, a cold water pump 29, and an evaporator 5' are interposed in order from a heat extraction and radiation coil (heat extraction and radiation part) 28. There is. The evaporator side circulation waterway 27 branches into two cold waterways at point A', and one of the water coolers 27A has a 1A valve (chilled water valve) 30A and a fan coil unit 3.
4A and 3A valve (chilled water valve) 32A are installed in sequence, and the other cold water channel 27B is equipped with a 1B valve (cold water valve) 30B, a fan coil,
Unit 34B, third valve (chilled water valve) 3
2B are interposed one after another, and one cold water channel 27 is inserted at point B'.
It joins A. Further, a branch cold water channel 27C having a bypass valve 27D branches from the other cold water channel 27B at point C', and the branch cold water channel 27C joins one cold water channel 27A at point D'. and,
The evaporator side circulation waterway 27 downstream of point D' returns to the heat extraction and radiation coil 28 via the first heat extraction and radiation section connection switching valve 21. Reference numeral 23 denotes a third switching valve installed in the evaporator side circulation waterway 27, which connects the downstream part of the second heat extraction/radiation section connection switching valve 22 of the evaporator side circulation waterway 27 and the point D' downstream of the evaporator side circulation waterway 27. Connect parts/
Cut off.

Reference numeral 35 denotes a condenser side circulation waterway, in which a switching valve 22 for connecting the second heat extraction and radiation section, a hot water pump 36, and a condenser 2' are interposed in order from the heat extraction and radiation coil 28. And the condenser side circulation waterway 3
5 branches into two hot water channels at point E', and one of the hot water channels 35A is equipped with a 2A valve (hot water valve).
31A, fan coil unit 34A, No.
A 4A valve (hot water valve) 33A is installed in sequence, and a 2B valve (hot water valve) 31B, a fan coil unit 34B, and a 4B valve (hot water valve) 33B are installed in the other hot water channel 35B in order. It is interposed and joins one hot water channel 35A at point F'. Fan coil unit 34 above
A and 34B are cooling water that has passed through the evaporator 5' or
The indoor air is heated and cooled by hot water passing through the condenser 2'. The condenser side circulation waterway 35 downstream of point F' is connected to the first heat extraction/radiation section connection switching valve 21.
After that, it returns to the heat extraction and radiation coil 28.

Further, a branch hot water channel 35C having a fourth switching valve 24 branches from the other hot water channel 35B at point G,
The branched cold water channel 35C joins one of the warm water channels 35A at point H. 25 is a fifth switching valve installed in the condenser side circulation waterway 35;
The downstream part of the switching valve 22 for connecting the second heat extraction/dissipation part and the downstream part of point H are communicated and cut off.

The heat extraction/dissipation coil 28 has a plate-type structure (as shown in FIG. 3), is installed in the screen 28A shown in FIG. give and receive.

Next, the operation of the embodiment of the second invention will be explained.

Figure 8 shows the conditions during summer and cooling.

In the figure, the 1st A valve 30A, the 3rd A valve 32A, the 1B valve 30B, and the 3rd B valve 32B.
is open. 2nd A valve 31A, 4th A valve 33A, 2nd B valve 31B, 4th B valve 33
B, bypass valve 27D is closed. Therefore, the evaporator side circulation waterway 27 is in communication with the fan coil units 34A, 34B, and the condenser side circulation waterway 35 is in a blocked state. Further, the third switching valve 23 and the fourth switching valve 24 are in an open state, and the fifth switching valve 25 is in a closed state. The switching valve 21 for connecting the first heat extraction and radiation part, the second
The heat extraction/dissipation unit connection switching valve 22 communicates with the path shown by the thick solid line of the condenser side circulation waterway 35.

In this case, the hot water in the condenser side circulation channel flows from the condenser 2' to the fourth switching valve 2, as shown by the solid arrow.
4→Switching valve 21 for connecting the first heat extracting and discharging section→Radiating coil 28→Switching valve 22 for connecting the second heat extracting and discharging section→
It circulates in a cycle of hot water pump 36 → condenser 2'.

On the other hand, the cold water in the evaporator side circulation waterway 27 flows from the evaporator 5' to the 1st A valve 30A as shown by the dotted arrow.
→ Fan coil unit 34A → 3rd A valve 32A → 3rd switching valve 23 → Cold water pump 29
→It circulates in the evaporator 5' cycle. A part of the cold water in the evaporator side circulation waterway 27 branches at point A' and passes through the other cold waterway 27B to the 1st B valve 30B → the fan coil unit 34B → the 1st valve.
3B flows in the order of valve 32B, and merges with one cold water channel 27A at point B'.

Therefore, the hot water in the condenser side circulation waterway 35 reaches a high temperature as heat is released by condensation of the refrigerant in the condenser 2' of the cooling cycle system, but the hot water in the condenser side circulation waterway 35 reaches a high temperature due to heat being released by condensation of the refrigerant. It is cooled by the heat radiation coil 28. Therefore, the cooling efficiency in the condenser 2' is improved.
Therefore, the refrigerating capacity is improved, and the cooling efficiency of the fan coil units 34A, 34B can be improved. This means that in order to obtain the same heating effect, the capacity of the cooling cycle system can be smaller. On the other hand, in response to the heat released in the condenser 2' of the cooling cycle system, the refrigerant evaporates in the evaporator 5', and the cooling water in the evaporator side circulation channel 27 is deprived of heat and cooled to the fan coil.・Unit 34
Return to A, 34B and repeat this cycle.

FIG. 9 shows the state during cooling during the intermediate period, where the cooling load on the fan coil units 34A and 34B is smaller than the desired load, the cooling cycle is not used, and only ground water is used as a low heat source.

In the figure, the 1st A valve 30A, the 3rd A valve 32A, the 1B valve 30B, and the 3rd B valve 32
B, bypass valve 27D is open. 2nd A
The valve 31A, the fourth A valve 33A, the second B valve 31B, and the fourth B valve 33B are closed. Therefore, the evaporator side circulation waterway 27 is in communication with the fan coil units 34A, 34B, and the condenser side circulation waterway 35 is in a blocked state. In addition, a third switching valve 23, a fourth switching valve 24,
The fifth switching valve 25 is in a closed state. The first heat extraction and radiation unit connection switching valve 21 and the second heat extraction and radiation unit connection switching valve 22 communicate with the path of the evaporator side circulation waterway 27 shown by the thick solid line.

In this case, the fan coil unit 34A,
The cooling water in the evaporator side circulation waterway 27, whose temperature has increased by receiving heat by cooling the indoor air at 34B, is transferred to the heat extraction and radiation coil 28 as shown by the dotted line arrow.
It is cooled by groundwater (low heat source) at a constant temperature, passes through the evaporator 5' of the cooling cycle system (the cooling cycle does not operate), returns to the fan coil units 34A and 34B, and returns to the indoor air. Cooling. Therefore, the heat alone can be used as a low-temperature heat source without pumping groundwater up to structures such as buildings on the ground.

Then, if the cooling cycle is operated in the mid-season cooling state shown in FIG. Since the cold water in the evaporator side circulation waterway 27 supplied to 34A and 34B is cooled not only by the evaporator 5' of the cooling cycle system but also by ground water (low heat source), the amount of temperature drop of the cold water in the evaporator 5' is reduced. less. Therefore, the amount of refrigerant evaporated in the evaporator 5' is also reduced, and the capacity of the cooling cycle system can be reduced.

Figure 10 shows the state during winter/heating.

In the figure, the 1st A valve 30A, the 3rd A valve 32A, the 1B valve 30B, and the 3rd B valve 32B.
is closed. 2nd A valve 31A, 4th A valve 33A, 2nd B valve 31B, 4th B valve 33
B, bypass valve 27D is open. Therefore, the condenser side circulation waterway 35 is in communication with the fan coil units 34A, 34B, and the evaporator side circulation waterway 27 is in a blocked state. In addition, the third switching valve 23 and the fourth switching valve 24
is in a closed state, and the fifth switching valve 25 is in an open state. First heat extraction/radiation unit connection switching valve 21;
The second heat extraction/radiation section connection switching valve 22 communicates with the path shown by the thick solid line of the evaporator side circulation waterway 27.

In this case, the cold water in the evaporator side circulation waterway 27 flows from the evaporator 5' to the bypass valve 27D to the first heat extraction and radiation section connection switching valve 21 as shown by the dotted arrow.
It circulates in a cycle of heat radiation coil 28 → second heat extraction/radiation section connection switching valve 22 → cold water pump 29 → evaporator 5'.

On the other hand, the hot water in the condenser side circulation waterway 35 flows from the condenser 2' to the E' point to the 2nd A valve 31A to the fan coil unit 34A to the 2nd valve as shown by the solid arrow.
It circulates in a cycle of 4A valve 33A → fifth switching valve 25 → hot water pump 36 → condenser 2'. A part of the hot water in the condenser side circulation waterway 35 is
It branches at point E' and passes through the other hot water channel 35B.
2B valve 31B → fan coil unit 3
It flows in the order of 4B→4th B valve 33B, and merges with one hot water channel 35A at point F'.

Therefore, the cooling water in the evaporator side circulation waterway 27 loses heat through evaporation of the refrigerant in the evaporator 5' of the cooling cycle system and becomes low temperature. It is heated by the heat extraction and radiation coil 28. Therefore, the evaporation efficiency in the evaporator 5 is improved.
Therefore, the refrigerating capacity is improved, and the heating efficiency of the fan coil units 34A, 34B can be improved. This means that in order to obtain the same cooling effect, the capacity of the cooling cycle system can be smaller. On the other hand, in response to the evaporation of the refrigerant in the evaporator 5' of the cooling cycle system, the refrigerant is condensed in the condenser 2', and the hot water in the condenser side circulation waterway 35 is given heat and heated, and the fan coil・Unit 3
Return to 4A and 34B and repeat this cycle.

FIG. 11 shows another method of use during heating.

In the figure, the 1st A valve 30A, the 3rd A valve 32A, the 1B valve 30B, and the 3rd B valve 32
B, bypass valve 27D is closed. 2nd A
The valve 31A, the fourth A valve 33A, the second B valve 31B, and the fourth B valve 33B are open. Therefore, the condenser side circulation waterway 35 is in communication with the fan coil units 34A, 34B, and the evaporator side circulation waterway 27 is in a blocked state. In addition, a third switching valve 23, a fourth switching valve 24,
The fifth switching valve 25 is in a closed state. The first heat extraction and radiation unit connection switching valve 21 and the second heat extraction and radiation unit connection switching valve 22 communicate with a path of the condenser side circulation waterway 35 shown by a thick solid line.

According to this configuration, the hot water in the condenser side circulation waterway 35 is transferred from the condenser 2' to the fan coil units 34A and 34B to the heat extraction and radiation coil 28 to the condenser 2'.
It circulates in cycles.

Therefore, the fan coil unit 34A,3
4B removes heat by heating the indoor air, and the hot water in the condenser side circulation waterway 35 whose temperature has dropped is heated by underground water (high heat source) in the heat extraction and radiation coil 28, and then heated in the condenser of the cooling cycle system. Heat of condensation is applied at 2' to warm the air, and the air can be circulated again to the fan coil units 34A and 34B.
In this case, fan coil unit 3
If the heating load of 4A, 34B is smaller than the desired load, simply pass the hot water from the condenser side circulation waterway 35 through the condenser 2' (the cooling cycle does not operate).
It is also possible to heat the room using underground water (a high heat source) using only the heat extraction and radiation coil 28.

According to the above configuration, the first heat extraction and radiation section connection switching valve 21, the second heat extraction and radiation section connection switching valve 22, the third switching valve 23, and the fourth switching valve 2
4. By switching the fifth switching valve 25, the evaporator side circulation waterway 27 or the condenser side circulation waterway 35 can be connected to the heat extraction and radiation coil 28. Therefore, in addition to the effects of the embodiment of the first invention,
During summer and air conditioning, the heat of the groundwater in a low-temperature state is picked up by the heat extraction and radiation coil 28, and cold water is flowed into the condenser side circulation channel 35, improving the cooling efficiency of the condenser 2', and the fan coil Unit 34A, 3
4B, and the heat extraction/dissipation coil 28 can be used as a high heat source for heating in winter or during heating.

To summarize the effects of the embodiment of the second invention, as in the embodiment of the first invention, heat from the underground water, which is in a state of high and low temperature with respect to fluctuations in temperature on the ground, can be collected by the heat extraction and radiation coil 28.
, and circulate it to the evaporator side circulation waterway 27 or the condenser side circulation waterway 35, and then directly or indirectly to the fan coil units 34A, 34.
Take it to B and heat it up. Such groundwater does not need to be pumped up to structures such as buildings on the ground, and only its heat can be used as a low- or high-heat source. As a result, even when pumping up large-scale natural water such as groundwater is restricted, the heat of groundwater can be used on a large scale as a heat source, and the capacity of cooling cycle equipment can be reduced. I can do it.

In the above embodiment, the heat extraction/dissipation coils 8 and 28 have a plate-type structure (as shown in FIG. 3), but are not limited to this, and may have a finch-tube structure or a tube-type structure, for example. It can also be configured.

Further, in the above embodiment, the heat extraction and radiation coils 8 and 28 are installed in underground water, but the present invention is not limited to this, and they may be installed in large-scale natural water such as rivers, lakes, and the sea. You can also do that.

Furthermore, in the embodiments described above, cooling or hot water is passed through the fan coil unit 14.
A, 14B, 34A, and 34B were used to cool and heat the room, but an air conditioner may be used instead.

[Effects of the Invention] As described above, according to the air conditioning system according to the first invention, during summer and cooling, the cooling water in the evaporator side circulation waterway whose temperature has increased is cooled by underground water in the heat extraction and radiation coil. An air conditioner or fan coil unit can be used to cool the air. Therefore,
The capacity of cooling cycle equipment can be reduced, and the heat from underground water can be used as a low-temperature heat source without having to pump it up to structures such as buildings above ground.

In the winter or during heating, by improving the evaporation efficiency of the evaporator, the amount of heat released by the condenser can be increased and the air conditioner or fan coil unit can be heated. Therefore, the heat alone can be used as a high heat source without pumping groundwater up to structures such as buildings above ground.

According to the air-conditioning device according to the second invention, in addition to the effects produced by the air-conditioning device according to the first invention, hot water is allowed to flow through the condenser-side circulation channel during summer/cooling.
It can improve the cooling efficiency of the condenser and cool the air conditioner or fan coil unit.
Furthermore, during winter and heating, the heat extraction and radiation coil can be used as a direct high heat source for heating an air conditioner or fan coil unit.

To summarize the above, according to the air-conditioning device according to the first invention and the air-conditioning device according to the second invention, it is restricted that large-scale natural water such as groundwater can be guided to structures such as buildings on the ground. Even in the case of underground water, it is possible to use only its heat as a low or high heat source without guiding it to structures such as buildings on the ground, and as a result, the heat of large-scale natural water can be used on a large scale as a heat source. As a result, the capacity of the cooling cycle system can be reduced.

[Brief explanation of drawings]

Fig. 1 is a system diagram of a heating and cooling system using groundwater according to an embodiment of the first invention, Fig. 2 is a perspective view of a screen, Fig. 3 is a perspective view of a heat extraction/dissipation coil, and Fig. 4 is a diagram of the heating and cooling system during summer.・Figure 5 is an illustration of the usage status of the heating and cooling equipment during cooling. Figure 6 is an illustration of the usage status of the heating and cooling equipment during winter and heating. FIG. 8 is a system diagram of a heating and cooling system using groundwater according to an embodiment of the second invention.
Fig. 9 is an explanatory diagram of the usage state of the air-conditioning device during the cooling period, Fig. 10 is an explanatory diagram of the usage state of the air-conditioning equipment during the winter season and heating time, and Fig. 11 is an illustration of the usage state of the air-conditioning device during the heating period. It is a usage state explanatory diagram showing another usage method at the time. 1, 1'... Compressor, 2, 2'... Condenser, 5,
5'...Evaporator, 6,6'...Refrigerant circuit, 7,27
... Evaporator side circulation waterway, 8, 28 ... Heat extraction and radiation coil, 10A, 30A ... 1st A valve, 10B,
30B... 1st B valve, 11A, 31A... 1st
2A valve, 11B, 31B...2nd B valve, 1
2A, 32A...3rd A valve, 12B, 32B
... 3rd B valve, 13A, 33A... 4th A valve, 13B, 33B... 4th B valve, 14A,
14B, 34A, 34B...Fan coil unit, 15, 35...Condenser side circulation waterway, 2
1, 22...Switching valve for connecting the heat extraction/dissipation part, 23...
...Third switching valve, 25...Fifth switching valve.

Claims (1)

[Scope of Claims] 1. A cooling cycle system is formed by a compressor, a condenser, a liquid receiver, an expansion valve, and an evaporator, and the evaporator side circulation waterway and the condenser are part of the evaporator. A common air conditioner or fan coil unit is installed in the middle of the condenser side circulation waterway, and cold water valves and hot water valves are installed in the middle of the evaporator side circulation waterway and the condenser side circulation waterway. By opening and closing the valve, cold water in the evaporator side circulation channel or hot water in the condenser side circulation channel is supplied to the air conditioner or fan.
A large-scale air-conditioning system that performs air-conditioning and heating by leading to a coil unit, characterized in that a heat extraction and radiation section that exchanges heat with large-scale natural water as a high heat source or low heat source is interposed in the evaporator side circulation waterway. A heating and cooling system that uses natural water. 2 A cooling cycle system is formed by a compressor, a condenser, a liquid receiver, an expansion valve, and an evaporator, and a steamer-side circulation waterway in which the evaporator is part and a condenser in which the condenser is part. By installing a common air conditioner or fan coil unit in the middle of the side circulation waterway, and opening and closing the cold water valve and hot water valve installed in the middle of the evaporator side circulation waterway and the condenser side circulation waterway, respectively, The cold water in the evaporator side circulation waterway or the hot water in the condenser side circulation waterway is routed to an air conditioner or fan.
In a heating and cooling system that performs air conditioning and heating by leading to a coil unit, a heat collecting and discharging section that exchanges heat with large-scale natural water as a high heat source or a low heat source is installed in the middle of the evaporator side circulation waterway and the condenser side circulation waterway. A switching valve for connecting the heat extraction/dissipation section is installed in common, and a switching valve is also installed in the middle of the evaporator side circulation channel and the condenser side circulation channel to connect/cut off the cooling water or hot water to the heat extraction/dissipation section. A heating and cooling system that utilizes large-scale natural water is characterized by the installation of each.