JP2002228207A - Heat storage air conditioning system utilizing natural chill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a prior art system that the structure is intricate, cold heat recovery is low and a countermeasure must be taken against the load of ice. SOLUTION: In the heat storage air conditioning system utilizing natural chill, a water tank 4 is disposed in a thermal insulation chamber 1 constituting an outdoor air introducing section 2 and a discharging section 3, an ice making water supply section 5 is disposed above the water tank 4, a water spray section 6 is disposed above one side of the water tank and a water intake section 7 is disposed on the other side thus constituting a heat source water circulation system 9 extending from the water intake section through a heat exchanging section for air conditioning to a water spray section. Ice making water is supplied from the ice making water supply section into the water tank in winter season, ice is made in the water tank by passing outdoor water of ice point or below through the thermal insulation chamber via the outdoor air introducing section and the discharging section and the ice is preserved in thermally insulated state until cooling season. In the cooling season, ice 17 in the water tank is sprayed with heat source water from the spray section and melted and water is taken in from the intake section and utilized as a cold heat source for air conditioning at the heat exchanging section for air conditioning of the heat source water circulation system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage air-conditioning system using natural cool air.

[0002]

2. Description of the Related Art A system has been proposed in which natural cold air in winter is stored and used as a cooling source for air conditioning in a cooling period. For example, Japanese Patent Application Laid-Open No. 2000-28240 discloses a water tank in which a heat exchange refrigerant tube is arranged at the bottom, and in winter, water is supplied into the water tank and outside air below the freezing point is repeatedly supplied daily to form a layered tank. And freeze it until the cooling period.In the cooling period, the antifreeze solution containing ethylene glycol etc. is circulated through the circulation path composed of the refrigerant pipe and the heat exchanger to collect the cold heat of the ice and use it as a cold heat source Is what you do.

[0003]

SUMMARY OF THE INVENTION In such a case,
Since the recovery of the cold heat of ice is performed by heat exchange with the refrigerant flowing through the refrigerant pipe provided at the bottom of the water tank, the following problems are encountered. a. The structure becomes complicated, and the installation cost of the refrigerant tube is increased. b. The amount of cold heat recovered per unit time is relatively small. c. In order to maintain the heat transfer property and to receive the load of the ice on the upper side of the refrigerant tube, a device is required. An object of the present invention is to solve such a problem.

[0004]

In order to solve the above-mentioned problems, according to the present invention, a water tank is installed in an insulated chamber having an outside air introduction section and an exhaust section, and an ice making water supply section is formed above the water tank. A water supply section is formed on the upper part of one side of the water tank and a water intake section is formed on the other side, and a heat source water circulation system from the water intake section through the heat exchange section for air conditioning to the water spray section is formed, and a water supply section for ice making in winter. The ice making water is supplied to the inside of the water tank from outside, and ice is made in the water tank by flowing outside air below the freezing point into the heat insulation room by the outside air introduction part and the exhaust part, and is insulated and stored until the cooling period, and on the ice in the water tank during the cooling period. We propose a thermal storage air-conditioning system using natural cold air, which is configured so that heat source water is sprinkled from the water sprinkling unit and melted, and water is taken from the water intake unit and used as a cooling air source for air conditioning by the air-conditioning heat exchange unit of the heat source water circulation system. .

According to the present invention, in the above configuration, an intake tank is formed adjacent to the other side of the water tank, and the molten water is taken in through the water tank and introduced into the heat source water circulation system. suggest.

According to the present invention, in the above configuration,
A sprinkling unit and a water intake unit of a plurality of water tanks are connected to form a heat source water circulation system in series, or a sprinkling unit of a plurality of water tanks and a water intake unit are connected in parallel to form a heat source water circulation system, It is proposed to construct a heat source water circulation system by connecting the water sprinkling part and water intake part of the water tank in series and parallel.

As described above, according to the present invention, in the cooling period, the heat source water is sprinkled from the water sprinkling section onto the ice in the water tank to be melted.
Since water is taken from the water intake unit and used as a cooling air source for air conditioning by the air conditioning heat exchange unit of the heat source water circulation system, equipment such as a refrigerant pipe for exchanging heat with ice is not required. , Directly with water sprinkled on ice,
Cold heat can be efficiently recovered.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram conceptually showing an embodiment of the overall configuration of a heat storage air conditioning system using natural cold air according to the present invention. Reference numeral 1 denotes an insulation room installed in the basement or the like. The insulation room includes an outside air introduction unit 2 and an exhaust unit 3 so that outside air can flow through the room. The exhaust unit 3 is configured to be closed by a heat insulating lid (not shown) or the like when not in use.

[0009] A water tank 4 is installed in the heat insulating chamber 1.
The water tank 4 is provided with an ice making water supply unit 5 at an appropriate position on the upper part thereof. Further, a water sprinkling section 6 is formed on one side of the water tank 4 and a water intake section 7 is formed on the other side. In addition, water sprinkling part 6
And the ice making water supply unit 5 may be configured to also be used.

Reference numeral 8 denotes a heat source water tank, which constitutes a heat source water circulation system 9 that extends from the water intake section 7 to the heat source water tank 8 and returns from the heat source water tank 8 to the water sprinkling section 6. The heat source water circulation system 9 can be provided with a pump 10, a valve 11, and the like in appropriate places.

Reference numeral 12 denotes an air conditioner, and 13 denotes a heat exchanger thereof, which constitutes a second heat source water circulation system 14 that extends from the heat source water tank 8 to the heat exchanger 13 and returns from the heat exchanger 13 to the heat source water tank 8. are doing. The second heat source water circulation system 14 can also be provided with a pump 15, a valve, and the like at an appropriate position.

In the above configuration, in the winter season, a predetermined amount of water is supplied from the ice making water supply unit 5 to the water tank 4 and stored therein, and when the outside air falls below the freezing point, the air below the freezing point is insulated from the outside air introduction unit 2. When the air is introduced into the chamber 1 and the air in the heat insulating chamber 1 is exhausted from the exhaust unit 3, the water stored in the water tank is cooled by the outside air below the freezing point and freezes. The outside air can be efficiently introduced by operating the fan 16 provided in the outside air introduction unit 2 and the exhaust unit 3.

At this time, a method of freezing the water in the water tank 4 by the outside air below the freezing point is a method disclosed in the above-mentioned literature, for example, supplying water into the water tank to supply the outside air below the freezing point. By repeating this, a method of freezing into a layer can be applied, or another appropriate method can be used.

In the above-mentioned ice making, the circulation of the outside air to the heat insulating chamber 1 can be automatically performed by detecting the temperature of the outside air, and a freezing sensor based on the temperature and electric resistance can be provided. After all the supplied water is frozen, the next water supply can be automatically performed, and the control method is appropriate.

An example of a method of controlling water supply and the fan 16 in the above ice making will be described below. In this example, fan 1
Numeral 6 detects the outside air temperature and performs ON / OFF control during the ice making period, for example, from December to March, and water supply to the water tank 4 performs ON-OFF control based on the integrated value of the outside air temperature. For example, the fan 16 is turned on when the outside air temperature is −2 ° C. or less, and −1
It is controlled to be OFF at a temperature of at least ° C. On the other hand, for water supply to the water tank 4, the water supply valve is turned on, that is, opened, water is supplied for a predetermined time by a timer, that is, a predetermined amount of water is supplied, and the water supply valve is turned on.
The water supply is stopped by closing the FF, that is, the water supply is stopped, and the integrated value up to that point is cleared to newly start the integration of the outside air temperature. This integration of the outside air temperature is performed, for example, every hour, and when the value exceeds the set value, it is considered that the water supplied to the water tank 4 by the above-mentioned water supply is frozen, and the same as above. Provide the following water supply. At this time, the above set values are determined by preliminary experiments, etc.
The water supply amount can be derived and set. For example, if it is necessary to freeze all the water supplied to the water tank 4 at a depth of 10 cm at an outside temperature of -5 ° C for 6 days, the integrated value of the temperature, -5 (° C) x 24 ( Time) x 6 (days) =
-720 (° C) may be set as the lower limit of the set value. In this way, layered ice is gradually formed in the water tank 4, and water is supplied to the water tank 4 in the water supply.
When the inside is full, this is detected by a water level sensor or the like, the water supply valve is closed, and the fan 16 is turned on.
To make the top layer ice.

When a predetermined amount of ice is formed in the water tank 4 as described above, the outside air introduction unit 2 and the exhaust unit 3 are closed and stored in an adiabatic state until the cooling period. The ice is indicated by reference numeral 17.

In the cooling period, the heat source water circulation systems 9 and 14 are operated to utilize the cold heat of ice. That is, when city water or groundwater is sprinkled on the ice 17 from the water sprinkling section 6 on one side in the water tank 4, the ice melts and mixes with the sprinkled water to become cold water, and the cold water 18 is removed from the water section 7. Water is taken and introduced into the heat source water tank 8 by the heat source water circulation system 9. On the other hand, the water in the heat source water tank 8 is recirculated by the heat source water circulation system 9 and is again sprinkled from the water sprinkling section 6 to be used for melting the ice 17.

The water in the heat source water tank 8 whose temperature has been reduced by the supply of cold water from the water tank 4 by the heat source water circulation system 9 is supplied to the heat exchanger 1 of the air conditioner 12 by the second heat source water circulation system 14.
3 and used as a cold heat source.

The ice 17 thus formed in the water tank 4 in the winter season
Is recovered by melting the water with water sprinkled on the ice 17 and introducing the melted water into the heat source water tank 8, so that the recovery of cold heat can be directly and efficiently performed. Therefore, a refrigerant pipe or the like for indirectly exchanging heat with ice is not required.

FIG. 2 shows an embodiment of the water sprinkling section 6 and the water intake section 7. The water sprinkling section 6 and the water intake section 7 are formed by providing a number of holes 20 in a header pipe 19 extending in the lateral direction, respectively. In this configuration, water is sprinkled from the water sprinkling section 6 and
Reaches a uniform one-way flow with respect to the water tank 4, and can uniformly melt the ice.

FIGS. 3 to 6 are a second embodiment of the overall configuration of a heat storage air conditioning system using natural cold air according to the present invention, and a system diagram conceptually showing the operation thereof. In this embodiment, elements corresponding to those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted. Also, FIG.
In FIG. 6, for convenience of explanation, not all components are shown in each drawing, but only those necessary for explanation are shown. That is, in this embodiment, the water intake tank 21 is formed adjacent to the other side of the water tank 4. A partition 22 is provided in the water intake tank 21 with a lower part communicating therewith. A partition 23 between the water intake tank 21 and the water tank 4 has an upper communication part 24 and a lower communication part 25.

FIG. 3 shows the ice making situation in winter.
A cap 26 is attached to the lower communication part 25. In such a state, a predetermined amount of water is supplied from the water sprinkling section 5, the water is frozen by the outside air below the freezing point introduced from the outside air introducing section 2, and the operation of supplying water again from the water sprinkling section 5 after freezing. By repeatedly performing, layered ice 17,
For example, multiple layers of ice having a thickness of 5 to 10 cm can be made. Such a repetitive operation can be automated using the above-described control method or using a timer, a temperature sensor, or the like.

FIG. 4 shows a state in which multiple layers of ice are stored in a water tank according to FIG. 3 in a state of making ice, and before being used as a cooling heat source for air conditioning in a cooling period. That is, before using as a cold heat source, after removing the cap 26 of the lower communication part 25, water is supplied from the water supply part 27 by control using a water level sensor. The water supplied from the water supply part 27 gradually accumulates in the water intake tank 21, and finally, the upper communication part 24 of the partition wall 23.
When the water tank 4 and the water intake tank 21 enter a predetermined communication state via the upper communication part 24, the water level sensor is turned on and the water supply is stopped.

FIG. 5 shows a state in which the heat exchanger is used as a cold heat source. Reference numeral 13 denotes a heat exchanger of an air conditioner as described above. This heat exchanger 13 can be, for example, an AHU. . In FIG. 5, the water in the water intake tank 21 is
The water is returned to the water sprinkling section 6 by the flow path of the heat source water circulation system 9 and sprinkled from the water sprinkling section 6 to one side of the water tank 4. On the other hand, the water stored in the water tank 4, i.e., the cold water 18,
Then, water flows from the water tank 21 to the water sprinkling section 6 through the water tank 4, and is circulated from the water tank 4 to the water tank 21 via the upper communication section 24, that is, heat source water is circulated.

On the other hand, the cold water in the water intake tank 21 is supplied to the pump 15
Flows through the outgoing path of the heat source water circulation system 14 to reach the heat exchanger 13, where it is used as heat source water in air conditioning such as generation of cold air, and then flows through the return path of the heat source water circulation system 14 and is drawn into the water intake tank 21. And the heat source water is circulated. As can be seen from the above operation description, the water intake tank 21
Has the same function as the heat source water tank 8 in the configuration of FIG.

As a result of the above operation, the ice 17 gradually melts from the upper part in contact with the heat source water 18 as indicated by the two-dot chain line in the figure, and is completely melted, and the water temperature in the water tank 4 becomes higher than a predetermined temperature. At that point, the use as heat source water is stopped.

Next, if necessary, as shown in FIG. 6, a valve 2 of a drainage system 28 provided at the bottom of the water intake tank 21 is used.
9 is opened and drained to an appropriate drainage tank 30, or the valve 32 of a drainage system 31 branched from the return path of the heat source water circulation system 9 is opened to drain to a rainwater tank or the like. The water in the aquarium 4
Water is drained to the position of the lower communication portion 25, and by setting the position as low as possible, almost all the water in the water tank 4 can be drained. Such drainage can be omitted.

When the drainage in the water tank 4 and the water intake tank 21 is completed as described above, a cap 26 is attached to the lower communication part 25 in preparation for making ice in the next winter season.

In the above embodiment, the components of the ice making water supply unit 5, the water sprinkling unit 6, and the water supply unit 27 can be shared.

In the above description of the embodiment,
The cap 26 is attached to the lower communication part 25 at the time of ice making, and is detached before use as a cold heat source to supply water. However, the cap 26 is temporarily provided at the start of ice making. 25, the lower communication part 25
It is also possible to remove the water after the water at the position is frozen, and in this case, it is not necessary to remove the water when using as a cold heat source.

Next, FIG. 7 shows a third embodiment of a thermal storage air conditioning system using natural cold air according to the present invention. In this embodiment, as shown in the second embodiment, A plurality of water tanks 21 are provided adjacent to the water tank 4, and the water supply unit 5 and the water intake unit 6 are connected to form a series heat source water circulation system. Therefore, the same components as those of the second embodiment are denoted by the same reference numerals, and duplicate description will be omitted. In this embodiment, the upstream water intake tank 21 is not provided with the partition wall 22 provided in the downstream water intake tank 21, and is provided from the water intake tank 21 to one side of the downstream water tank 4. And a heat source water relay path 34 in which a pump 33 is provided. On the other hand, on one side of the upstream water tank 4, a reflux path of the heat source water circulation system 14 of the heat exchanger 13 is connected to the water sprinkling section 5. The heat source water and the heat source water that has passed through the heat exchanger 13 pass through the reflux path of the heat source water circulation system 9 and are sprayed into the water tank 4 on the upstream side. On the other hand, as with the second embodiment, the downstream water intake tank 21 is connected to the outgoing path and the return path of the heat source water circulation system 14 and the return path of the heat source water circulation system 9.

With the above-described series configuration, the temperature of the heat source water supplied to the heat exchanger 13 of the air conditioner can be lowered.

As another embodiment of the thermal storage air-conditioning system of the present invention, although not shown, the water sprinkling section and the water intake section of a plurality of water tanks are respectively connected in parallel to form a parallel heat source water circulation system. In this case, the heat storage capacity per heat source water circulation system can be increased.

As still another embodiment of the heat storage air conditioning system of the present invention, although not shown, a plurality of water tanks may be connected in series and parallel to form one heat source water circulation system.

[0035]

As described above, the present invention has the following effects as compared with the prior art. a. Since a refrigerant pipe for recovering cold heat from ice is not required, the configuration is simple and the installation cost is low. b. The amount of cold heat recovered per unit time can be increased. c. Since a refrigerant pipe is not required, there is no need to maintain heat transfer related thereto or to take measures for receiving a load of ice on the upper side of the refrigerant pipe.

[Brief description of the drawings]

FIG. 1 is a system diagram conceptually showing an embodiment of the overall configuration of a heat storage air conditioning system of the present invention.

FIG. 2 is a perspective view showing an embodiment of a configuration of a water sprinkling section and a water intake section.

FIG. 3 is a second view of the overall configuration of the heat storage air conditioning system of the present invention.
FIG. 1 is a system diagram conceptually showing an embodiment of the present invention and one aspect of its operation.

FIG. 4 is a second view of the overall configuration of the heat storage air conditioning system of the present invention.
FIG. 5 is a system diagram conceptually showing an embodiment of the present invention and another aspect of the operation.

FIG. 5 is a second view of the overall configuration of the heat storage air conditioning system of the present invention.
FIG. 7 is a system diagram conceptually showing an embodiment of the present invention and still another aspect of the operation.

FIG. 6 shows a second example of the overall configuration of the heat storage air conditioning system of the present invention.
FIG. 7 is a system diagram conceptually showing an embodiment of the present invention and still another aspect of the operation.

FIG. 7 is a system diagram conceptually showing a third embodiment of the configuration of the heat storage air conditioning system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated room 2 Outside air introduction part 3 Exhaust part 4 Water tank 5 Water supply part for ice making 6 Sprinkling part 7 Water intake part 8 Heat source water tank 9,14 Heat source water circulation system 10,15 Pump 11 Valve 12 Air conditioner 13 Heat exchanger 16 Fan 17 Ice 18 Cold water 19 Header pipe 20 Hole 21 Water intake tank 22, 23 Partition wall 24 Upper communication part 25 Lower communication part 26 Cap 27 Water supply part 28, 31 Drainage system 29, 32 Valve 30 Drain tank 33 Pump 34 Heat source water relay path

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Shigihara 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Hirofumi Doroda 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo No.Taisei Construction Co., Ltd. Taisei Corporation (72) Inventor Hitoshi Fukao 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation (72) Inventor Ryoichi Kamiuchi 315 Osatsunai, Urasu-cho, Kabato-gun, Hokkaido 24

Claims (4)

[Claims] 1. A water tank is installed in a heat insulating chamber having an outside air introduction section and an exhaust section, and an ice making water supply section is formed above the water tank.
A water supply section is formed on the upper part of one side of the water tank and a water intake section is formed on the other side, and a heat source water circulation system from the water intake section through the heat exchange section for air conditioning to the water spray section is formed, and a water supply section for ice making in winter. The ice making water is supplied to the inside of the water tank from outside, and ice is made in the water tank by flowing outside air below the freezing point into the heat insulation room by the outside air introduction part and the exhaust part, and is insulated and stored until the cooling period, and on the ice in the water tank during the cooling period. Heat storage using natural cold air, characterized in that the heat source water is sprinkled from the water sprinkling section and melted, and the water is taken from the water intake section and used as a cold source for air conditioning by the heat exchange section for air conditioning of the heat source water circulation system. Air conditioning system 2. An intake tank is formed adjacent to the other side of the water tank,
2. A thermal storage air conditioning system using natural cold air according to claim 1, wherein the molten water is taken in through a water tank and introduced into a heat source water circulation system. 3. The thermal storage air-conditioning system using natural cold air according to claim 1, wherein a sprinkling section and an intake section of a plurality of water tanks are connected to form a series heat source water circulation system. 4. The natural cold air according to any one of claims 1 to 3, wherein a sprinkling part and a water intake part of a plurality of water tanks are respectively connected in parallel to constitute a heat source water circulation system. Thermal storage air conditioning system