JP3641318B2 - Distributed heat storage air conditioning system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioning system, and more particularly to a distributed heat storage type air conditioning system in which a heat storage device is arranged for each individual air conditioning space.
[0002]
[Prior art]
Conventionally, various distributed heat storage type air conditioning systems have been proposed. For example, an air conditioning system in which a heat storage tank is installed for each individual air conditioning space has been proposed. However, there is a problem that initial cost is required for the installation of the heat storage tank and the heat source transport pipe, the installation space is limited, and relatively large transport power is required. In addition, air conditioning systems that use the building frame itself as a heat storage device have been proposed, but they have many problems such as the heat storage capacity depends on the frame structure and the control of the amount of heat taken out when using the heat storage is difficult. ing.
[0003]
Further, as a smaller-scale distributed heat storage type air conditioning system, for example, in JP-A-2-157547, a latent heat storage material for heating is disposed on the floor surface, and a latent heat storage material for cooling is disposed on the ceiling surface. An air conditioning system is proposed in which a heat storage material is connected to an indoor unit of a heat pump type air conditioner via a refrigerant pipe, and heat is selectively stored in one of the heat storage materials according to the season. However, in the air conditioning system as described above, since a liquid phase fluid is used as a heat transfer medium, piping connecting the indoor unit and the heat storage material is indispensable, and the heat storage material is also used for heating and cooling. There is a problem that the type is necessary and the initial cost is required along with the design constraints. In addition, since the heat storage material is exposed to the air-conditioning room and heat exchange is performed directly with the indoor air, there is a problem that the indoor temperature cannot be finely adjusted.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the problems of the conventional distributed heat storage type air conditioning system as described above. It is possible to disperse the heat storage function and realize the heat storage at the use position of the heat. By using air as a heat transfer medium instead of a liquid phase fluid, piping is unnecessary, and it is possible to control the amount of heat taken out when using heat, which is especially new and improved for building air conditioning systems. It aims to provide a distributed heat storage type air conditioning system.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, the distributed heat storage type air conditioning system according to claim 1 is configured such that a plenum chamber is formed in at least one of a floor, a ceiling, or a wall surface of an air conditioning room, and a heat storage material is placed in the plenum chamber. A heat storage mode in which heat is stored in the heat storage material by circulating air heated or cooled by an air conditioner, a heat extraction mode in which the return air from the air conditioning chamber is brought into direct contact with the heat storage material, and the heat extraction mode is used. The return air from the air conditioning room is heated or cooled by an air conditioner, and the circulating air can be switched to one of the circulating modes without directly contacting the heat storage material. . In addition, the distributed heat storage type air conditioning system is equipped with a damper that switches to the circulation mode, and the heat storage material is disposed from the air duct that communicates with the plenum chamber in which the heat storage material is disposed by switching the damper. By switching to the air guide path communicating with the air conditioner without going through the plenum chamber, the circulating air can be configured not to contact the heat storage material directly.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a distributed heat storage air conditioning system according to the present invention will be described in detail with reference to the accompanying drawings.
[0007]
The most basic configuration example of the distributed heat storage type air conditioning system 100 according to the present embodiment will be described with reference to FIG. 1 and FIG. 2. As shown in FIG. A plenum chamber 108 having a double floor structure is formed below the floor surface 106. A heat storage body 110 is laid in the plenum chamber 108. As shown in FIG. 2, which is a schematic plan view of the distributed heat storage type air conditioning system 100 according to the present embodiment, the heat storage body 110 encloses a latent heat storage material (not shown) in a thin plate-like storage container 112. This can be configured. Moreover, although various commercially available heat storage materials can be used as the latent heat storage material, it is also possible to simply use water as the heat storage material. As the storage container 112, for example, a polyethylene resin can be used. In addition, if the storage container 112 is configured as a container having a size that can be easily handled, it can be easily installed under the floor.
[0008]
Further, the structure of the plenum chamber 108 will be described with reference to FIG. 3 which is a partially enlarged view of the distributed heat storage air conditioning system of FIG. 1. The plenum chamber 108 is laid on a housing 114 that defines the structure of the air conditioning room. Formed between the heat insulating material 116 and the floor surface 106. Further, in the plenum chamber 108, upper and lower circulation paths 108a and 108b are formed by the heat storage body 110 configured in a thin plate shape as described above. By configuring the upper and lower circulation paths 108a and 108b divided by the heat storage body 110 in this way, the contact area between the air circulating in the plenum chamber 108 and the heat storage body 110 is expanded, and the heat storage efficiency and heat extraction efficiency are increased. Can be increased.
[0009]
An air conditioner 118 is installed in one wall surface of the air conditioning chamber 102. As shown in FIG. 1, the air conditioner 118 includes a heat exchanger EX, a fan unit F, and a damper D. The circulating air heated or cooled by the heat exchanger EX is supplied into the plenum chamber 108. In addition to storing heat in the heat storage body 110, the return air is supplied into the plenum chamber 108 and directly brought into contact with the heat storage body 110 to extract heat, and the heated or cooled conditioned air is sent to the ceiling of the air conditioning chamber 102. Air can be supplied into the air conditioning chamber 102 from a plurality of ceiling outlets 124 via a duct 122 installed on the back 120.
[0010]
As described above, according to the distributed heat storage type air conditioning system 100 according to the present embodiment, the heat storage function is distributed by laying the latent heat storage material sealed in a container of a size that is easy to handle under the floor in the air conditioning room. In addition, heat storage in the vicinity of the heat utilization position can be realized. Moreover, according to this Embodiment, since air is used as a heat carrier medium, unlike the case where a liquid phase fluid is used as a heat carrier medium as in a conventional air conditioning system, piping is not required.
[0011]
The latent heat storage material 110 may be spread over the entire plenum chamber 108, but may be partially spread according to the required amount of heat storage. For example, in the trial calculations, if the maximum thermal loading of the day during the cooling assuming 1200kcal / ^{(m 2} · day), day 50% of the maximum heat load (600kcal / ^{(m 2} · day)) to heat storage of the If it spreads over 60% of the floor area (1200 × 0.5 / 960 (heat storage amount per 1 m ² ) = 0.6), the heat storage amount satisfies the condition. Moreover, the circulating air temperature at the time of heat storage is 5.8 degreeC, for example, when water is utilized as an air flow rate of 3 m / s, the heat storage time of 10 hours, and a latent heat storage material.
[0012]
Next, some actual configuration examples and operations of the distributed heat storage type air conditioning system configured based on the present invention will be described. In addition, in the following description, about the member which has the same function and structure as the distributed heat storage type | formula air conditioning system 100 demonstrated in relation to FIGS. 1-3, the duplication description is abbreviate | omitted by attaching | subjecting the same reference number. I will do it.
[0013]
(1) Ceiling suction type (Type A)
The distributed heat storage type air conditioning system 100a shown in FIG. 4 is of a ceiling suction type, and sends the return air in the air conditioning chamber 102 to the plenum chamber 108 from a return air port 126 provided near the ceiling of the air conditioning chamber 102. be able to. A fan F1 is inserted in the air guide path 128 for returning the return air from the plenum chamber 108, and switching dampers D1 and D2 are installed upstream and downstream of the fan F1. In the air conditioner 118, a heat exchanger EX and a fan F2 for supplying air into the room are installed. Note that a damper D3 is installed in the air supply path 122 for supplying air to the air conditioning chamber 102 on the downstream side of the fan F2. The return air from the plenum chamber 108 can be selectively sent to the air conditioning room side and the plenum chamber side of the heat exchanger EX via the two air ducts 130 and 132 by switching the dampers D4 and D5. . Further, the plenum chamber side of the heat exchanger EX communicates with the air guide path 128 on the upstream side of the fan F1 via the damper D6. A wind guide path 134 for taking in outside air is connected to the plenum chamber side of the heat exchanger EX via a damper D7, and outside air can be taken into the air conditioner 118.
[0014]
Next, the operation of the ceiling suction type air conditioning system 100a shown in FIG. 4 will be described. The air conditioning system 100a can be operated in a heat storage mode, a heat extraction mode, a circulation mode, and a heat extraction / circulation mode.
[0015]
(A) Thermal storage mode In the thermal storage mode, only the fan F1 is driven, the dampers D2, D4, and D6 are set to the open state, and the other dampers are closed. As a result, the circulating air heated or cooled by the heat exchanger EX is circulated in the plenum chamber 108 through the damper D6 → the fan F1 → the damper D2 → the circulation path 108a → the circulation path 108b → the damper D4 → the heat exchanger EX. Cold heat or warm heat is stored in the heat storage body 110.
[0016]
(B) Heat extraction mode In the heat extraction mode, the fans F1 and F2 are both driven, the dampers D1, D2, D3, and D4 are set in the open state, and the other dampers are closed. As a result, the return air from the air-conditioning chamber 102 is circulated in the plenum chamber 108 through the damper D1 → fan F1 → damper D2 → circulation path 108a → circulation path 108b → damper D4 → fan F2 → damper D3 → air supply port 124. The conditioned air heated or cooled by the heat storage body 110 can be supplied to the conditioned room 102.
[0017]
(C) Circulation mode In the circulation mode, only the fan F2 is driven, the dampers D1, D3, and D6 are set in the open state, and the other dampers are closed. As a result, the return air from the air conditioning chamber 102 is circulated through the damper D1, the damper D6, the heat exchanger EX, the fan F2, the damper D3, the air supply port 124, and the conditioned air heated or cooled by the heat exchanger EX. The air conditioning room 102 can be supplied.
[0018]
(D) Heat extraction / circulation mode In the heat extraction / circulation mode, the fans F1, F2 are both driven, the dampers D1, D2, D3, D5 are set to the open state, and the other dampers are closed. As a result, the return air and / or outside air from the air conditioning room is circulated with the fan F1 → the damper D2 → the circulation path 108a → the circulation path 108b → the damper D5 → the heat exchanger EX → the fan F2 → the damper D3 → the air supply port. The temperature of the conditioned air heated or cooled by the heat accumulator 110 in the plenum chamber 108 is further controlled by passing through the heat exchanger EX, and the conditioned air that is optimally temperature-controlled can be supplied to the air conditioning chamber 102.
[0019]
(2) Ceiling suction type (Type B)
In FIG. 5, a second heat exchanger EX52 is further added to the ceiling suction type air conditioning system shown in FIG. As shown in the figure, the return air from the air conditioning chamber 102 can be sent to the circulation path 108b of the plenum chamber 108 by the fan F51 through the damper D51 through the air guide path 150. The circulation path 108a of the plenum chamber 108 communicates with the plenum chamber side of the second heat exchanger EX52. The air return path 150 for the return air is branched between the downstream side of the damper D51 and the upstream side of the fan F51, and the downstream side of the air flow of the second heat exchanger EX52 through the damper D52 by the wind guide path 152. Communicating with Further, the return air air duct 150 is branched upstream of the damper D51, and the second air exchange is performed by the air duct 154 via the dampers D53 and D54 in the air duct 152 from the position where the damper D52 is installed. It communicates with the container EX52 side. Further, the air guide path 154 communicates with the upstream side of the airflow of the first heat exchanger 118 of the air conditioner 118 through the air guide path 156 at a point between the dampers D53 and D54. Moreover, it is possible to take in external air via the damper D55 to the upstream side of the air flow of the first heat exchanger 118 of the air conditioner 118. A fan F52 is installed on the air conditioning room side of the first heat exchanger 118 of the air conditioner 118, and communicates with the indoor air supply port 124 via the damper D56.
[0020]
Next, the operation of the ceiling suction type air conditioning system 100b shown in FIG. 5 will be described. The air conditioning system 100b can be operated in a heat storage mode, a heat extraction mode, and a circulation mode. Since the second heat exchanger EX52 is installed in the air conditioning system 100b, it can cope with a larger air conditioning load.
[0021]
(A) Thermal storage mode In the thermal storage mode, the fan F51 is driven, the damper D52 is set to an open state, and the other dampers are closed. Then, the fan F51 → the circulation path 108b → the circulation path 108a → the second heat exchanger EX52 → the damper D52 → the fan F51 and the air are circulated, and the plenum chamber 108 is circulated by the circulating air heated or cooled by the second heat exchanger EX52. It is possible to store heat in the internal heat storage body 110.
[0022]
(B) Heat extraction mode In the heat extraction mode, the fans F51 and F52 are driven, the dampers D51, D54 and D56 are set in the open state, and the other dampers are closed. Then, the return air from the room is circulated in the order of damper D51 → fan F51 → circulation path 108b → circulation path 108a → second heat exchanger EX52 → damper D54 → first heat exchanger EX51 → fan F52 → damper D56. If necessary, it is possible to open the damper D55 and take in outside air. By configuring the air circulation path in this way, air heated or cooled by the heat storage body 110 in the plenum chamber 108 can be supplied into the air conditioning chamber 102. The first heat exchanger EX51 and / or the second heat exchanger EX52 can also be driven according to the size of the air conditioning load required in the air conditioning chamber 102.
[0023]
(C) Circulation mode In the circulation mode, only the fan F52 is driven, the dampers D53 and D56 are set in the open state, and the other dampers are closed. Then, the return air from the room is circulated through the damper D53 → the first heat exchanger EX51 → the fan F52 → the damper D56, and the conditioned air is heated or cooled by the first heat exchanger EX51 and supplied to the air conditioning chamber 102. Can do. If necessary, it is possible to open the damper D55 and take in outside air.
[0024]
(3) Floor Suction Type FIG. 6 shows a distributed heat storage type air conditioning system 100c according to still another embodiment of the present invention. In this air conditioning system 100 c, the plenum chamber 108 is partitioned into a plurality of sub-chambers 108 c and 108 d by the heat storage body 110. In the example shown in the figure, it is divided into two sub-chambers 108c and 108d. In addition, suction ports R61 and R62 having switching dampers D61 and D62 are formed in the floor surface 106 of the air conditioning chamber 102 corresponding to the ceiling surfaces of the sub-chambers 108c and 108d. An air conditioner 118 including a heat exchanger EX60 and an air supply fan F60 is installed adjacent to the air conditioning chamber 102. The plenum chamber side of the heat exchanger EX60 communicates with one of the sub-chambers 108d through the air guide passage 160, and communicates with the outside air through the damper D63 through the air guide passage 162. The other sub-chamber 108c communicates with the air conditioning chamber side of the heat exchanger EX60 via the damper D64 through the air guide path 164. Further, the air conditioning chamber side of the heat exchanger EX60 communicates with the indoor air supply port 124 via the damper D65 through the air guide path 122. Further, an air flow path is formed in the heat storage body 110, and air can flow from the upstream plenum chamber 108c to the downstream plenum chamber 108d.
[0025]
Next, the operation of the floor suction type air conditioning system 100c shown in FIG. 6 will be described. The air conditioning system 100a can be operated in a heat storage mode, a heat extraction mode, and a circulation mode.
[0026]
(A) Thermal storage mode In the thermal storage mode, the fan F60 is driven, the damper D64 is set to an open state, and the other dampers are closed. As a result, fan F60 → damper D64 → subchamber 108c → heat storage body 110 → subchamber 108d → heat exchanger EX60 and air are circulated, and the heat storage body 110 is cooled or cooled by the air heated or cooled by the heat exchanger EX60. Heat can be stored. If necessary, the damper D63 can be opened to take in outside air.
[0027]
(B) Heat extraction mode In the heat extraction mode, the fan F60 is driven, the dampers D61 and D65 are set in the open state, and the other dampers are closed. Then, the air in the air conditioning chamber 102 is circulated through the suction port R61 → the damper D61 → the sub chamber 108c → the heat storage body 110 → the sub chamber 108d → the heat exchanger EX60 → the fan F60 → the damper D65 → the air supply port 124, and the heat storage body. Air-conditioned air heated or cooled by 110 can be supplied to the air-conditioned room 102. Also in this case, the damper D63 may be opened to take in outside air, or the conditioned air may be further heated or cooled by the heat exchanger EX60.
[0028]
(C) Circulation mode In the circulation mode, since heat is not extracted from the heat storage body 110, the fan F60 is driven and only the dampers D62 and D65 are opened. Then, the air in the air conditioning chamber 102 is circulated through the suction port R62 → the damper D62 → the sub chamber 108d → the heat exchanger EX60 → the fan F60 → the damper D65 → the air supply port 124, and the circulating air is heated or heated by the heat exchanger EX60. Cooled and conditioned air can be supplied into the conditioned room. Also in this case, the damper D63 may be opened to take in outside air.
[0029]
Although several embodiments of the distributed heat storage type air conditioning system configured based on the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood.
[0030]
For example, as shown in FIG. 7, a fan unit 170 including a fan F70 and a damper D70 is installed on the outer wall side of the air conditioning chamber 102, and the air in the plenum chamber 108 is sucked and blown out to the air conditioning chamber 102 as necessary. You can also According to such a configuration, the heat load in the interior zone is processed by the air conditioner 118 during the summer day, and the heat load in the perimeter zone is cooled by the heat accumulator 110 from the plenum chamber 108 by the fan unit 170. This can be dealt with by taking out the air.
[0031]
Alternatively, as shown in FIG. 8, a fan unit 180 including a fan F80 and a damper D80 is installed on the outer wall side of the air conditioning chamber 102, and the air in the air conditioning chamber 102 is sucked and blown out to the plenum chamber 108 as necessary. You can also. According to such a configuration, a part of the perimeter load is processed in the air conditioner, and the indoor environment can be improved.
[0032]
Moreover, in the said embodiment, although the structure which lays a thermal storage body in the plenum chamber formed under the floor was shown, this invention is not limited to this example. According to the present invention, the heat storage body is arranged in a plenum chamber formed in the ceiling back of the air conditioning room or a plenum chamber formed in the wall of the air conditioning room, and adopts a configuration for storing heat and taking out heat. Is also possible. Of course, it is also possible to employ a configuration in which the heat accumulator is installed at a plurality of locations in the floor, under the ceiling, or in the wall.
[0033]
Moreover, you may comprise so that the arbitrary positions of a floor surface may be opened and a ventilation volume control means and a wind guide path may be arrange | positioned. For example, as shown in FIG. 9, an opening 190 is provided on the floor surface, and a flexible air guide path 192 is led to the vicinity of the worker 194 from there, and is installed in the vicinity of the worker 194 to adjust the air flow rate. A simple personal air-conditioning system can be realized if the temperature-controlled air is blown out to the vicinity of the worker 194 from the personal air outlet 196 that can be used. is there.
[0034]
【The invention's effect】
As described above, according to the present invention, a distributed heat storage type air conditioning system capable of realizing reduction of heat source transfer piping and transfer power is provided. That is, according to the present invention, the heat storage body is installed under the floor, behind the ceiling, or in the wall near the position where the air conditioning load is present, so that the installation space such as the heat storage tank is substantially unnecessary, and the introduction of the heat storage system is tenant. Does not affect the rentable ratio of buildings. In addition, in the conventional distributed heat storage method in which water heat storage and ice heat storage are distributed to each floor, the arrangement position is restricted in the existing building due to the weight of the heat storage tank. Is almost uniformly dispersed, so that the weight constraint is relaxed. Moreover, according to this invention, since air is used as a heat transfer medium and the circulating air and the heat storage material are directly heat-exchanged, piping becomes unnecessary and the degree of freedom in equipment planning can be increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic configuration of an embodiment of a distributed heat storage type air conditioning system according to the present invention.
FIG. 2 is a plan view showing a schematic configuration of an embodiment of a distributed heat storage type air conditioning system according to the present invention.
FIG. 3 is a partial cross-sectional view showing an enlarged plenum chamber portion of the distributed heat storage type air conditioning system shown in FIGS. 1 and 2;
FIG. 4 is a configuration diagram schematically showing a configuration of a distributed heat storage type air conditioning system according to another embodiment of the present invention.
FIG. 5 is a configuration diagram schematically showing a configuration of a distributed heat storage type air conditioning system according to still another embodiment of the present invention.
FIG. 6 is a configuration diagram schematically showing a configuration of a distributed heat storage type air conditioning system according to still another embodiment of the present invention.
FIG. 7 is a block diagram schematically showing a configuration of a distributed heat storage type air conditioning system according to still another embodiment of the present invention.
FIG. 8 is a configuration diagram schematically showing a configuration of a distributed heat storage type air conditioning system according to still another embodiment of the present invention.
FIG. 9 is a configuration diagram schematically showing a configuration of a distributed heat storage type air conditioning system according to still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 Distributed heat storage-type air conditioning system 102 Air conditioning room 106 Floor 108 Plenum chamber 108a, 108b Air flow path 110 Heat storage body 118 Air conditioner D Damper EX Heat exchanger F Fan

Claims (2)

  A plenum chamber is formed in at least one of the floor, ceiling, or wall surface of the air conditioning room, a heat storage material is disposed in the plenum chamber, and heat storage to the heat storage material is performed by circulating air heated or cooled by the air conditioner. The heat storage mode to be performed, the heat extraction mode in which the return air from the air conditioning room is brought into direct contact with the heat storage material to extract heat, or the return air from the air conditioning room is heated or cooled by an air conditioner, and the circulating air is A distributed heat storage air conditioning system, wherein the heat storage material can be switched to any one of circulation modes without directly contacting the heat storage material. The distributed heat storage type air conditioning system includes a damper for switching to the circulation mode, and when the damper is switched, the heat storage material is transferred from an air guide path communicating with the plenum chamber in which the heat storage material is disposed in the circulation mode. 2. The distributed heat storage type according to claim 1, wherein the circulating air does not directly contact the heat storage material by switching to a wind guide path that communicates with the air conditioner without passing through the arranged plenum chamber. Air conditioning system.

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