Building

Abstract

To focus on heat exchangers installed on the exterior walls of buildings, and contribute to energy conservation by using the exterior walls of buildings as a heat source.SOLUTION: In view of these problems, the present invention has solved the problems by providing a building 7 including a heat exchanger 1 and a heat utilization portion 4, in which the heat exchanger 1 is embedded in a building exterior wall 9 and passes a heat medium therethrough, thereby changing the temperature of the building exterior wall 9. The heat utilization portion 4 is any one of a heat utilization device, a cold heat storage portion, and a hot heat storage portion. The heat exchanger 1 sends the heat medium to the heat utilization portion 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a building with a thermal system that utilizes the building's exterior walls. [Background technology]

[0002] Previously, the Ministry of the Environment has advocated storing and utilizing cold and hot energy in underground aquifers from the perspective of energy conservation, as in Non-Patent Document 1. Furthermore, systems have been put into practical use, where hot water production equipment that uses sunlight as a heat source is installed on the roof and sends the water to heat utilization areas (baths, etc.). However, while development has been carried out on the exterior walls of buildings to improve their insulation and weather resistance, there has been no effort to use them as a heat source. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] https: / / www.env.go.jp / content / 900542334.pdf Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention aims to contribute to energy conservation by using the exterior walls of buildings as a heat source. [Means for solving the problem]

[0005] In view of the above, the present invention provides a building comprising a heat exchanger and a heat utilization unit, the heat exchanger being embedded in the exterior wall of a building and passing a heat medium therethrough, and changing the temperature of the exterior wall of the building, the heat utilization unit being one of a heat utilization device, a cold heat storage unit, and a hot heat storage unit, and the heat exchanger sending the heat medium to the heat utilization unit. By doing so, the problem was solved. [Effects of the Invention]

[0006] The building of the present invention contributed to energy conservation. [Brief explanation of the drawings]

[0007] [Figure 1] Figure 1 is an explanatory diagram of the building, heat exchanger, heat utilization section, and control section. [Figure 2] Figure 2 shows a cross-section of a building exterior wall. Figure 2(A) shows an example of a heat exchanger placed behind the exterior material. Figure 2(B) shows an example of a heat exchanger embedded in the exterior material. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals in different drawings denote parts with the same functions, and duplicated descriptions in each drawing will be omitted as appropriate.

[0009] [Example] FIG. 1 is an explanatory diagram of a building 7, a heat exchanger 1, a heat utilization unit 4, and a control unit 8. (Building exterior wall) The building 7 shown in FIG. 1 is provided with a heat exchanger 1 in an exterior wall surface 71 (exterior wall 9 of the building) on the south side (S). The heat exchanger 1 installed in the building 7 is not limited to being installed on the south side (S), but may be installed on any of the north, south, east, and west sides. The heat exchanger 1 is installed with the same specifications regardless of the direction of the surface unless there are special circumstances. Therefore, the examples in this specification will describe in detail the heat exchanger 1 installed in the exterior wall surface 71 (exterior wall 9 of the building) on the south side (S). The south-facing (S) exterior wall surface 71 is exposed to sunlight, especially in the summer, and heats up to a temperature higher than the ambient temperature. Although the building frame has built-in insulation 94, the exterior wall surface 71, which is heated during the day, does not cool down easily even at night. As a result, heat flows into the room, causing a decrease in air conditioning efficiency.

[0010] (Outline of heat exchanger) The heating medium heated by the heat exchanger 1 installed in the exterior wall 9 of the building is sent to the control unit 8 via the outflow pipe 12 . A heat pump 41, which is a type of heat utilization unit 4, is provided inside the room. The heat pump 41 of the embodiment receives the hot water medium sent via the control unit 8 through the first heat utilization system 51 (heat pump), and stores high-temperature hot water in the hot water storage tank 6. The hot water of the hot water medium is utilized and the temperature of the hot water medium is reduced, and the heat medium returns to the control unit 8 again.

[0011] The heat medium whose temperature has been lowered and returned from the first heat utilization system 51 (heat pump) is sent to the heat exchanger 1 through the inlet pipe 11, forming a thermal cycle that cools the exterior wall 9 of the building.

[0012] (Heat use in summer) In the summer, the amount of heat utilization unit 4 that utilizes the heat is limited. The amount of high-temperature hot water stored in the hot water storage tank 6 that is used in the summer is small. Ultimately, the heat that is not utilized in the heat utilization unit 4 is discarded into the environment using an outdoor unit or the like.

[0013] (New heat utilization section) In recent years, as described in Non-Patent Document 1, it has become possible to store large amounts of hot and cold energy in underground aquifers, making it possible to utilize the heat without disposing of it into the environment using outdoor units, etc. The heat utilization unit 4 in the present invention is not limited to heat utilization equipment such as a heat pump 41, but also includes cold heat storage units such as a soil cold storage unit 43 and an underground aquifer cold storage unit 45, as well as heat storage units such as a soil heat storage unit 42 and an underground aquifer heat storage unit 44.

[0014] (underground aquifer) Aquifers suitable for heat storage, such as the underground aquifer hot storage unit 44 and the underground aquifer cold storage unit 45, require that the groundwater does not flow much throughout the year, but there are many layers of aquifers underground, and sometimes an aquifer suitable for heat storage can be found, such as groundwater accumulated in an impermeable layer in a depression. The more groundwater accumulated, the higher the heat storage capacity, which contributes to energy conservation. In the case of underground aquifers with large heat capacities, it is possible to collect heat in the summer and use it throughout the winter.

[0015] (Soil heat storage section) The soil heat storage units such as the soil heat storage unit 42 and the soil cold storage unit 43 store cold or hot heat in the soil itself or in a heat storage material buried underground. The ideal location for the thermal storage unit is an impermeable layer beneath a building where rainwater cannot penetrate, or beneath a vast asphalt-paved parking lot of a store. If the entire basement of a vast parking lot or building is used as the thermal storage unit, it can have an extremely large heat capacity. In the case of soil thermal storage with a large thermal capacity, the heat collected in summer can be used throughout the winter. 1, in addition to the cold heat storage units such as the soil cold storage unit 43 and the underground aquifer cold storage unit 45, the heat storage units such as the soil heat storage unit 42 and the underground aquifer heat storage unit 44 are enclosed by frames, but this is for the sake of explanation. The heat storage units do not actually need to be enclosed by any structure. However, if the soil cold storage unit 43 and the soil hot storage unit 42 are structures surrounded by insulating material underground, the heat storage performance will be improved. When a structure is used for the heat storage unit, the soil heat storage unit can be installed even in a permeable layer.

[0016] (Control unit) The control unit 8 is not necessarily required. When there are multiple heat storage units and heat utilization devices, the control unit 8 is used to control to which heat utilization unit 4 the heat medium of the heat exchanger embedded in the building exterior wall 9, which is the hot or cold heat source, is sent. The combination of the heat exchanger 1 and the multiple heat utilization units 4 can be changed manually. The outflow pipe 12 for the heat medium sent from the heat exchanger 1 is connected to the piping of one of the following: the first heat utilization system 51 (heat pump), the second heat utilization system 52 (soil heat storage section), the third heat utilization system 53 (soil cold storage section), the fourth heat utilization system 54 (underground aquifer heat storage section), or the fifth heat utilization system 55 (underground aquifer cold storage section). Furthermore, the temperature required by each heat utilization section 4 and the temperature of the heat medium sent from the heat exchanger are detected, and the control section 8 determines and automatically changes the combination. Although FIG. 1 shows the piping concentrated at the control unit 8, this is for the purpose of explanation; piping switching is performed by electromagnetic switching valves provided on each piping, and they do not need to be concentrated in one place. Furthermore, the control unit 8 may be located on the web and can be controlled by a smartphone or the like.

[0017] (Heat utilization in winter) The cold energy of the building exterior wall 9 is stored in a cold energy storage unit such as the soil cold energy storage unit 43 or the underground aquifer cold energy storage unit 45. As the soil cold energy storage unit 43 or the underground aquifer cold energy storage unit 45 is cooled, the heat medium is warmed and returned to the heat exchanger 1 via the inlet pipe 11. The stored cold can be used in the summer. The heated building exterior wall 9 allows ice and snow to melt and fall off, preventing problems associated with ice and snow accumulation.

[0018] (Heat exchanger structure) 2 is a cross-sectional view of a building exterior wall 9. FIG. 2(A) shows an example in which a heat exchanger 1 is disposed behind an exterior material 91. The exterior material 91 can be a variety of materials, including panels such as siding boards and tiles. Figure 2(A) shows an example cross-sectional view of a building exterior wall 9; building exterior walls 9 with different cross-sectional structures exist. The heat exchanger 1 is attached to the building 7 in a position and structure that allows it to capture heat from the building exterior wall 9, regardless of the structure of the building exterior wall 9. In the building exterior wall 9 shown in Figure 2(A), the exterior material 91 is located on the outermost side and is supported by supporting structures such as furring strips (not shown). The heat exchanger 1 is preferably installed as close to the building exterior wall 9 as possible. If the heat exchanger 1 cannot contact the building exterior wall 9 due to the placement of the supporting structure, it may be installed in a ventilation space 92. The ventilation space 92 is a space provided between the moisture-permeable waterproof sheet 93 and the building exterior wall 9 and serves to exhaust moisture to the outside. The insulation 94 is located on the indoor side of the moisture-permeable waterproof sheet 93. The moisture-proof film 95 is installed on the indoor side of the insulation 94. The interior material 96 is located closest to the interior of the vehicle.

[0019] As mentioned above, the heat exchanger 1 prevents the building exterior wall 9 from heating up to high temperatures, especially in the summer, and contributes to energy conservation in air conditioners. Moreover, the heat medium heated by the heat exchanger 1 is used in various heat utilization units 4. In particular, the heat is stored in heat storage units such as the soil heat storage unit 42 and the underground aquifer heat storage unit 44, which are part of the heat utilization unit 4, and contributes to energy conservation by serving as a heat supply source at night and in winter.

[0020] (Temperature measurement part) When selecting the heat utilization section 4 as a heat storage section or heat utilization equipment, the temperature of the heat medium flowing in the outlet pipe 12 of the heat exchanger 1 is useful information. It is a preferred embodiment to place a temperature measuring unit (not shown) in the outflow pipe 12 . Furthermore, the soil heat storage section 42 and the soil cold storage section 43 have a large volume, and as the stored cold or hot heat increases or decreases, temperature deviations occur depending on the location. Therefore, it is preferable to provide a large number of temperature measurement sections over a wide range in all directions within the soil heat storage section 42 and the soil cold storage section 43. The heat capacity stored in the heat storage section can be roughly determined by the multiple temperature measuring sections.

[0021] (Freezing of underground aquifer cold storage unit) The underground aquifer cold storage unit 45 can also be frozen. If the heat medium flowing through the outlet pipe 12 of the heat exchanger 1 is below the freezing temperature, the heat pump 41 can be used to further lower the temperature of the heat medium before sending it to the underground aquifer cold storage unit 45.

[0022] (Heat exchangers other than building exterior walls) The embodiment focuses on the heat exchanger 1 installed on the building exterior wall 9. In a modified example, in addition to the building exterior wall 9, the heat exchanger 1 is installed on a roof exposed to sunlight or under the asphalt of a parking lot.

[0023] The above has described in detail the embodiments of the present invention along with examples, but the specific configuration is not limited to these embodiments, and the present invention also includes design changes and the like within the scope of the present invention that do not deviate from the gist of the present invention. Furthermore, the above-described embodiments can be combined by utilizing the techniques of each other, as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0024] 1 heat exchanger 11 Inflow pipe 12 Outflow pipe 4 Heat utilization section 41 Heat Pump 42 Soil heat storage unit 43 Soil cooling storage unit 44 Underground aquifer heat storage section 45 Underground aquifer cold storage section 51 First heat utilization system (heat pump) 52 Second heat utilization system (soil heat storage section) 53 Third heat utilization system (soil cool storage section) 54 4th heat utilization system (underground aquifer heat storage section) 55 5th heat utilization system (underground aquifer cold storage section) 6. Hot water tank 7 Building 8 Control Unit 9 Building exterior walls 91 Exterior materials 92 Ventilation space 93 Breathable waterproof sheet 94 Insulation 95 Moisture-proof film 96 Interior materials

Claims

[Claim 1] Equipped with a heat exchanger and heat utilization section, The heat exchanger is embedded in the building's exterior wall and passes a heat medium through it, changing the temperature of the building's exterior wall. The heat utilization unit is one of a heat utilization device, a cold heat storage unit, and a hot heat storage unit, The heat exchanger sends the heat medium to the heat utilization section.

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