JP7371833B1 - geothermal air conditioning system - Google Patents

Abstract

[Problem] To provide a geothermal air conditioning system with improved heating and cooling efficiency. A geothermal air conditioning system 1 is employed in a building BU having a basement B2 serving as an air conditioning room. This geothermal air conditioning system 1 is installed in a basement B2 with a geothermal heat pump 2 that extracts geothermal heat, sucks air from the basement B2, and uses the cold or warm heat extracted by the geothermal heat pump 2. The air handling unit 3 adjusts the temperature of the air it sucks in, and then sends out the temperature-adjusted air to the rooms F1 and F2 on the ground via the air introduction ducts 11a and 11b, and from the rooms F1 and F2 to the basement. It includes air exhaust ducts 12a, 12b and an atrium 13 connected to B1. [Selection diagram] Figure 1

Description

Application of Article 30, Paragraph 2 of the Patent Act Construction began on June 9, 2020 at 566-6 Oaza Komuro, Kawagoe City, Saitama Prefecture

Application of Article 30, Paragraph 2 of the Patent Act Posted on the Kurasawa Construction Co., Ltd. website (http://kurasawa-const.com/) on September 26, 2020

Application of Article 30, Paragraph 2 of the Patent Act Posted on Hiroyuki Kaneko's Facebook (https://www.facebook.com/kaneko.hiroyuki) on January 26, 2020

Application of Article 30, Paragraph 2 of the Patent Act Posted on Nobuhisa Kurasawa's Facebook (https://www.facebook.com/nobuhisa.kurasawa) on February 7, 2020

Application of Article 30, Paragraph 2 of the Patent Act Published in Saitama Shimbun on April 15, 2020

Application of Article 30, Paragraph 2 of the Patent Act Published on the Saitama Shimbun website (https://www.saitama-np.co.jp/articles/22998/postDetail) on April 15, 2020

Article 30, Paragraph 2 of the Patent Act applies On April 18, 2020, YAHOO! Published in JAPAN News

Application of Article 30, Paragraph 2 of the Patent Act Posted on Yusuke Yoshida's Facebook (https://www.facebook.com/yusuke.yoshida.942) on April 15, 2020

Application of Article 30, Paragraph 2 of the Patent Act Posted on Nobuyuki Fukunaga's Facebook on April 15, 2020

Application of Article 30, Paragraph 2 of the Patent Act Posted on Mari Shimizu's Facebook on April 15, 2020

Application of Article 30, Paragraph 2 of the Patent Act Posted on Kenji Fukaya's Facebook (https://www.facebook.com/kenji.fukaya.18) on April 19, 2020

Application of Article 30, Paragraph 2 of the Patent Act On April 23, 2020, we filed an application for registration of the 2020 Net Zero Energy Building (ZEB) demonstration project ZEB Planner with the Environmental Co-Creation Initiative, a general incorporated association.

Application of Article 30, Paragraph 2 of the Patent Act On April 28, 2020, we filed an application for registration as a ZEB Leading Owner for the 2020 Net Zero Energy Building (ZEB) demonstration project with the Environmental Co-Creation Initiative II, a general incorporated association.

The present invention relates to a geothermal air conditioning system.

As a system using geothermal heat, Patent Document 1 describes a system that can take in outside air from the inlet side, has a geothermal heat exchanger installed in the soil, and is connected to the outlet side of the geothermal heat exchanger. , a heating/cooling ventilation system is disclosed that includes an intake blower that introduces outside air that has passed through the underground heat exchanger into a living room, and an exhaust blower that exhausts indoor air from the living room to the outside.

Japanese Patent Application Publication No. 2009-192185

In recent years, it has been desired to realize a zero energy building (ZEB) that reduces the amount of energy consumed and produces its own energy, thereby reducing the annual energy consumption to net zero or negative. Under these circumstances, there is a need to improve heating and cooling efficiency in systems that utilize geothermal heat as described above.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a geothermal air conditioning system with improved heating and cooling efficiency.

(1) The present invention provides a geothermal air conditioning system (for example, an underground Thermal air conditioning system 1) includes a ground source heat pump that extracts geothermal heat (for example, a ground source heat pump 2 to be described later), which is installed in the air conditioning room, sucks air from the air conditioning room, and An air handling unit (for example, An air handling unit 3) (described later), an air flow path connecting the room to the air conditioning room (for example, air exhaust ducts 12a, 12b and a stairwell 13, described later), and an air handling unit 3) that connects the room to the air conditioning room, and an air exhaust device (for example, an air exhaust device 41 described later) that discharges air to a heat exchanger (for example, a heat exchanger 43 described below) that exchanges heat between the air discharged outside the building by the exhaust device and the air introduced into the air conditioning room by the air introduction device; The geothermal air conditioning system is characterized in that the air exhaust device, the air introduction device, and the heat exchanger are configured separately from the air handling unit.

According to the present invention, air whose temperature has been adjusted in the basement, which is a closed and heat-insulated space compared to above-ground rooms, is circulated throughout the building, thereby increasing the efficiency of heating and cooling.
According to the present invention, heat exchange is performed between the air discharged to the outside of the building and the air introduced into the basement, so that heating and cooling efficiency can be improved.

( 2 ) The present invention also provides the geothermal air conditioning system according to (1) above, wherein the building is a two-story or multi-story building, and the air handling unit sends out air separately for each floor. It is.

According to the present invention, since air is sent out to each floor separately and air conditioning is performed according to the situation on each floor, heating and cooling efficiency can be improved.

( 3 ) The present invention also provides the above-mentioned (1) or ( This is the geothermal air conditioning system described in 2).

According to the present invention, since a filter is provided to remove dust contained in the air collected in the basement, the air in the entire building can be purified.

According to the geothermal air conditioning system described in (1) to ( 3 ) above, heating and cooling efficiency can be increased.

1 is a schematic diagram of a geothermal air conditioning system according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a control panel.

Hereinafter, a geothermal air conditioning system 1 (see FIG. 1) according to an embodiment of the present invention will be described in detail with reference to the drawings.

First, the configuration of the geothermal air conditioning system 1 will be explained using FIG. 1. FIG. 1 is a schematic diagram of a geothermal air conditioning system 1.

A geothermal air conditioning system 1 shown in Fig. 1 is a system adopted in a building BU that has a basement B2 that serves as an air conditioning room, and uses geothermal heat to control rooms F1 and F2 above ground in the building BU. Perform air conditioning. This geothermal air conditioning system 1 operates under the control of a control panel 20 (see FIG. 2), and its operating status is managed by the control panel 20 (see FIG. 2). In this embodiment, a case will be described as an example in which the building BU is a two-story building and includes a basement B1 and a basement B2 that serves as an air-conditioned room.

Specifically, the geothermal air conditioning system 1 includes a geothermal heat pump 2, an air handling unit 3, a ventilation/heat exchange unit 4, a borehole 5, a first circulation pipe 6, and a first circulation pump 7. , pumping device 8, second circulation pipe 9, second circulation pump 10, air introduction ducts 11a, 11b, air discharge ducts (channels) 12a, 12b, atrium (channel) 13, filter 14 , a control panel 20 (see FIG. 2), and the like.

The underground heat pump 2 is a device that extracts underground heat, and is installed in the basement B2. This ground source heat pump 2 draws in a first circulation pipe 6 that circulates liquid such as water between it and the borehole 5, and a second circulation pipe 9 that circulates liquid such as water between it and the air handling unit 3. I'm here. Furthermore, the underground heat pump 2 collects the cold or hot heat of the liquid flowing through the first circulation pipe 6 and transfers the cold or hot heat to the liquid flowing through the second circulation pipe 9 .

The air handling unit 3 is installed in the basement B2. This air handling unit 3 draws in a second circulation pipe 9 that circulates liquid between it and the underground heat pump 2, and is connected to air introduction ducts 11a and 11b that connect to the above-ground rooms F1 and F2. . In addition, the air handling unit 3 sucks the air in the basement B2, uses the cold or hot heat taken out to the second circulation pipe 9 by the ground source heat pump 2, and adjusts the temperature of the sucked air. , temperature-adjusted air is sent to the rooms F1, F2 on the ground via air introduction ducts 11a, 11b. Moreover, the air handling unit 3 sends out air separately for each floor. That is, the air handling unit 3 sends air to the room F1 on the first floor via the air introduction duct 11a, and sends air to the room F2 on the second floor via the air introduction duct 11b.

The ventilation/heat exchange unit 4 is installed in the basement B2. This ventilation/heat exchange unit 4 performs ventilation using the first type ventilation method, and also performs heat exchange between air entering and exiting through ventilation. Specifically, the ventilation/exchange unit 4 includes an air exhaust device 41, an air introduction device 42, and a heat exchanger 43.

The air exhaust device 41 has a power source (not shown) such as a fan or a pump, and forcibly generates a flow of air from inside the basement B2 to the outside of the building BU. Exhaust air outside the building BU.

The air introduction device 42 has a power source (not shown) such as a fan or a pump, and forcibly generates a flow of air from outside the building BU to the inside of the basement B2. Air is introduced into basement B2.

The heat exchanger 43 exchanges heat between the air discharged from the basement B2 to the outside of the building BU by the air exhaust device 41 and the air introduced into the basement B2 from outside the building BU by the air introduction device 42. Make an exchange.

The borehole 5 is a hole that reaches an underground aquifer. An aquifer is a stratum containing groundwater W. The upper surface of an aquifer is generally located at a depth of about 50 m or more and 100 m or less from the ground surface. Therefore, the depth of the borehole 5 is appropriately set in a range of approximately 50 m or more and 100 m or less so as to reach the aquifer. This borehole 5 is filled with groundwater W infiltrating from an aquifer. The natural water level of the groundwater W filling the inside of the borehole 5 is generally at a depth of 10 m or less from the ground surface. A first circulation pipe 6 and a water pumping pipe 81 constituting the water pumping device 8 are inserted into such a borehole 5 .

The first circulation pipe 6 is drawn into the borehole 5 from the ground source heat pump 2 installed in the basement B2, passes downward, and is turned back upward at the bottom of the borehole 5 before entering the borehole 5. It is pulled out and returned to the ground source heat pump 2. The first circulation pipe 6 is a pipe for circulating a liquid such as water as a refrigerant or a heat medium, and the liquid in the first circulation pipe 6 flows by the power of the first circulation pump 7.

Thereby, heat can be transferred between the groundwater W in the borehole 5 and the liquid flowing through the first circulation pipe 6. That is, when the groundwater W in the borehole 5 is lower temperature than the liquid flowing through the first circulation pipe 6, the liquid flowing through the first circulation pipe 6 is cooled. On the other hand, when the groundwater W in the borehole 5 has a higher temperature than the liquid flowing through the first circulation pipe 6, the liquid flowing through the first circulation pipe 6 is heated.

The first circulation pump 7 is provided in the middle of the first circulation pipe 6. The first circulation pump 7 circulates the liquid in the first circulation pipe 6 by applying power to the liquid in the first circulation pipe 6 .

The pumping device 8 pumps groundwater W from the borehole 5. Specifically, the water pumping device 8 includes a water pump 81 and a water pump 82.

One end of the lift pipe 81 is drawn into the borehole 5, and the other end on the opposite side is located outside the borehole 5. This pumping pipe 81 is a conduit for underground water W, and the groundwater W is discharged from the borehole 5 via the pumping pipe 81 by the power of the pumping pump 82 .

The lift pump 82 is provided in the middle of the lift pipe 81. The lift pump 82 applies power to the groundwater W in the lift pipe 81, thereby causing the groundwater W in the lift pipe 81 to flow.

The second circulation pipe 9 is arranged to reciprocate between the ground source heat pump 2 and the air handling unit 3. The second circulation pipe 9 is a pipe for circulating a liquid such as water as a refrigerant or a heat medium, and the liquid in the second circulation pipe 9 flows by the power of the second circulation pump 10.

The second circulation pump 10 is provided in the middle of the second circulation pipe 9. The second circulation pump 10 circulates the liquid in the second circulation pipe 9 by applying power to the liquid in the second circulation pipe 9.

The air introduction duct 11a has its base end connected to the air handling unit 3 in the basement B2, and its distal end located in the room F1 on the first floor. This air introduction duct 11a guides air whose temperature has been adjusted by the air handling unit 3 to the room F1 on the first floor.

The air introduction duct 11b has its base end connected to the air handling unit 3 in the basement B2, and its distal end located in the room F2 on the second floor. This air introduction duct 11b guides air whose temperature has been adjusted by the air handling unit 3 to the room F2 on the second floor.

The air exhaust duct 12a, together with the atrium 13, constitutes a flow path that connects from the room F1 on the first floor to the basement B2 via the basement B1. Further, the air exhaust duct 12a is provided under the floor of the first floor so that its tip reaches the atrium 13, and ventilation holes are formed as appropriate. The air exhaust duct 12a guides air from the room F1 taken in through a vent (not shown) formed in the floor of the room F1 on the first floor to the atrium 13.

The air exhaust duct 12b, together with the atrium 13, constitutes a flow path that connects from the room F2 on the second floor to the basement B2 via the basement B1. Further, the air exhaust duct 12b is provided under the floor of the second floor so that its tip reaches the atrium 13, and ventilation holes are formed as appropriate. The air exhaust duct 12b guides air from the room F2 taken in through a vent (not shown) formed in the floor of the room F2 on the second floor to the atrium 13.

The atrium 13, together with the air exhaust ducts 12a and 12b, is a flow path that connects from the rooms F1 and F2 to the basement B2 via the basement B1.

The filter 14 is provided at a vent (not shown) that penetrates the walls of the basement B1 and B2, and removes dust contained in the air collected from the rooms F1 and F2 to the basement B2.

As shown in FIG. 2, the control panel 20 includes a data logger 21 and a CPU (Central Processing Unit) 22.

The data logger 21 is configured by a recording medium such as a RAM (Random Access Memory). This data logger 21 stores processing programs for the CPU 22 to execute various processes, various data used when executing the various processes (including data used by the judgment unit 24 for judgment), and various flags. .

The CPU 22 functions as the communication section 23, the determination section 24, and the control section 25 by executing the processing program stored in the data logger 21.

The communication unit 23 transmits and receives signals to and from each part of the geothermal air conditioning system 1 (see FIG. 1). Specifically, the communication unit 23 transfers signals output from thermometers, flow meters, etc. placed at various locations to the determination unit 24. The communication unit 23 then transfers the control signal output by the control unit 25 to each part of the geothermal air conditioning system 1 (see FIG. 1).

The determination unit 24 determines the operating status of each part of the geothermal air conditioning system 1 (see Figure 1) by making various determinations based on signals output from thermometers, flow meters, etc. placed at various locations. decide. Then, the determination section 24 outputs the determination result to the control section 25 as a signal.

The control unit 25 outputs a control signal based on the signal output from the determination unit 24 to each unit of the geothermal air conditioning system 1 (see FIG. 1) via the communication unit 23, and controls the respective operation. Take control of the situation.

Next, the flow of heat in the geothermal air conditioning system 1 during cooling operation will be described using FIG. 1.

First, in the borehole 5, the cold heat of the groundwater W is transferred to the liquid flowing through the first circulation pipe 6. Next, in the underground heat pump 2, cold heat is collected from the liquid flowing through the first circulation pipe 6, and the collected cold heat is transferred to the liquid flowing through the second circulation pipe 9. Next, in the air handling unit 3, the cold energy contained in the liquid flowing through the second circulation pipe 9 is transferred to the air sucked from inside the basement B2. The air cooled by the air handling unit 3 is sent out to the rooms F1 and F2 via the air introduction ducts 11a and 11b. This cools the insides of the rooms F1 and F2. After cooling the insides of the rooms F1 and F2, the air is collected into the basement B2 via the air exhaust ducts 12a and 12b, the atrium 13, the basement B1, and the filter 14. In the basement B2, ventilation is performed by the ventilation/heat exchange unit 4 using the first type ventilation method. At this time, the ventilation/heat exchange unit 4 performs heat exchange between the air discharged outside the building BU and the air introduced into the basement B2.

Next, the flow of heat in the geothermal air conditioning system 1 during heating operation will be explained using FIG. 1.

First, in the borehole 5, the heat of the groundwater W is transferred to the liquid flowing through the first circulation pipe 6. Next, in the underground heat pump 2, heat is collected from the liquid flowing through the first circulation pipe 6, and the collected heat is transferred to the liquid flowing through the second circulation pipe 9. Next, in the air handling unit 3, the heat of the liquid flowing through the second circulation pipe 9 is transferred to the air sucked from inside the basement B2. The air heated by the air handling unit 3 is sent out to the rooms F1 and F2 via the air introduction ducts 11a and 11b. As a result, the insides of the rooms F1 and F2 are heated. The air after warming the rooms F1 and F2 is collected into the basement B2 via the air exhaust ducts 12a and 12b, the atrium 13, the basement B1, and the filter 14. In the basement B2, ventilation is performed by the ventilation/heat exchange unit 4 using the first type ventilation method. At this time, the ventilation/heat exchange unit 4 performs heat exchange between the air discharged outside the building BU and the air introduced into the basement B2.

Next, the flow of air in the geothermal air conditioning system 1 during air blowing will be described using FIG. 1.

First, air sucked into the air handling unit 3 from inside the basement B2 is sent out to the rooms F1 and F2 via the air introduction ducts 11a and 11b. The air in the rooms F1 and F2 is collected into the basement B2 via the air exhaust ducts 12a and 12b, the atrium 13, the basement B1, and the filter 14. In the basement B2, ventilation is performed by the ventilation/heat exchange unit 4 using the first type ventilation method. At this time, the ventilation/heat exchange unit 4 performs heat exchange between the air discharged outside the building BU and the air introduced into the basement B2.

In this way, according to the geothermal air conditioning system 1, air whose temperature is adjusted in the basement B2, which is a closed and heat-insulated space compared to the above-ground rooms F1 and F2, is circulated throughout the building BU. Therefore, heating and cooling efficiency can be increased.

Moreover, according to the geothermal air conditioning system 1, heat exchange is performed between the air discharged outside the building BU and the air introduced into the basement B2, so that heating and cooling efficiency can be improved.

Moreover, according to the geothermal air conditioning system 1, air is sent out to each floor separately and air conditioning is performed according to the situation on each floor, so it is possible to improve heating and cooling efficiency.

Moreover, according to the geothermal air conditioning system 1, the filter 14 that removes dust contained in the air collected in the basement B2 is provided, so that the air in the entire building BU can be purified.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit and technical idea thereof. That is, the position, size, length, quantity, shape, material, etc. of each component can be changed as appropriate.

For example, in the embodiment described above, the building BU is a two-story building, but the present invention is not limited to this, and if the building BU has a basement B1, the building BU can be a multi-story building with three or more stories. It may be a story building.

1 Geothermal air conditioning system 2 Geothermal source heat pump 3 Air handling unit 4 Ventilation/heat exchange unit 41 Air discharge device 42 Air introduction device 43 Heat exchanger 5 Borehole 6 First circulation pipe 7 First circulation pump 8 Water pumping device 81 Pumping water Pipe 82 Lifting pump 9 Second circulation pipe 10 Second circulation pump 11a, 11b Air introduction duct 12a, 12b Air discharge duct (flow path)
13 Atrium (channel)
14 Filter 20 Control panel 21 Data logger 22 CPU
23 Communication Department 24 Judgment Department 25 Control Department BU Building B1 Basement B2 Basement (air conditioning room)
F1, F2 Room W Groundwater

Claims (3)

A geothermal air conditioning system that is used in buildings that have basements that serve as air conditioning rooms,
A ground source heat pump that extracts heat from the ground,
Installed in the air conditioning room, the air in the air conditioning room is sucked in, and the temperature of the sucked air is adjusted using the cold or hot heat taken out by the ground source heat pump, and then the temperature is adjusted. an air handling unit that sends the air to a room on the ground via an air introduction duct;
an air flow path connecting the room to the air conditioning room;
an air exhaust device that exhausts air in the air conditioned room to the outside of the building;
an air introduction device that introduces air from outside the building into the air conditioning room;
A heat exchanger that performs heat exchange between the air discharged outside the building by the air exhaust device and the air introduced into the air conditioning room by the air introduction device ,
A geothermal air conditioning system , wherein the air exhaust device, the air introduction device, and the heat exchanger are configured separately from the air handling unit . The building is a two-story or multi-story building,
The geothermal air conditioning system according to claim 1, wherein the air handling unit sends out air separately to each floor. The geothermal air conditioning system according to claim 1 or 2, further comprising a filter that removes dust contained in air collected from the room into the air conditioning room.

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