House and dehumidifying device for house

Abstract

To provide a house that can be dehumidified while a change in room temperature is restrained.SOLUTION: A house 2 is provided. The house 2 includes: an underfloor space 3 that is a space partitioned by a floor 7, a foundation 8, and ground 9; an above-floor space 4 that is a heat-insulated space provided above the floor 7; a foundation heat-insulating material 5 provided in the foundation in order to heat-insulate the underfloor space 3 from outdoor air; an outdoor air introduction port 6 formed in the foundation in order to introduce the outdoor air for ventilation to the underfloor space 3; a heat pump type dehumidifying device 21 for dehumidifying the outdoor air taken from the outdoor air introduction port 6 or air in the underfloor space; an air supply device 22 for supplying the air in the underfloor space to the above-floor space 4; and a heat exchange path 31 formed between the dehumidifying device 21 and the air supply device 22 in the underfloor space, and for exchanging heat between the air dehumidified by the dehumidifying device 21 and geothermal heat.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to homes and dehumidifiers for homes. [Background technology]

[0002] Patent Document 1 below describes a ventilation and air-conditioning system for ventilating and air-conditioning a room in a building. This system has an air conditioner for supplying conditioned air to the room, and a supply means for supplying the air inside the room and outside air to the air inlet of the indoor unit of the air conditioner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-048932 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, in the summer when humidity is high, the interior space of a building may be dehumidified. Such dehumidification can be achieved, for example, by operating the air conditioner as described above in a cooling and dehumidifying mode, but this may result in the room temperature being lowered more than necessary. On the other hand, in order to prevent the room temperature from dropping, it is also possible to install a dehumidifier in the room and operate the dehumidifier in a dehumidifying mode, but the rise in air temperature caused by the dehumidification may result in the room temperature being higher than necessary.

[0005] The present invention has been devised in view of the above circumstances, and has as its main object to provide a house that is capable of dehumidifying while suppressing changes in room temperature. [Means for solving the problem]

[0006] The present invention is a house comprising: an underfloor space, which is a space partitioned by a floor, a foundation, and ground; an above-floor space, which is an insulated space provided above the floor; foundation insulation provided in the foundation to insulate the underfloor space from outside air; an outside air inlet formed in the foundation to introduce outside air for ventilation into the underfloor space; a heat pump type dehumidifier for dehumidifying the outside air taken in through the outside air inlet or the air in the underfloor space; an air supply device for supplying the air in the underfloor space to the above-floor space; and a heat exchange path formed in the underfloor space between the dehumidifier and the air supply device, for heat exchange of the air dehumidified by the dehumidifier with geothermal heat. [Effects of the Invention]

[0007] By adopting the above-described configuration, the house of the present invention can dehumidify while suppressing changes in room temperature. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view conceptually illustrating an example of a house provided with a dehumidifying device. [Figure 2] FIG. 1 is a conceptual diagram illustrating an example of a heat pump type dehumidifier. [Figure 3] FIG. 10 is a cross-sectional view conceptually illustrating an example of a house according to another embodiment of the present invention. [Figure 4] FIG. 2 is a conceptual diagram illustrating an example of the configuration of a control device. [Figure 5] 10 is a flowchart showing an example of a processing procedure of a method for dehumidifying a house. [Figure 6] 1(a) is a cross-sectional view showing a house of Comparative Example 1, and FIG. 1(b) is a cross-sectional view showing a house of Comparative Example 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood that the drawings include exaggerated representations and representations that differ from the dimensional ratios of actual structures in order to facilitate understanding of the contents of the invention. Furthermore, identical or common elements are designated by the same reference numerals throughout the embodiments, and redundant explanations will be omitted. Furthermore, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the contents of the present invention, and the present invention is not limited to the specific configurations shown in the drawings.

[0010] [Residential] 1 shows a cross-sectional view conceptually illustrating an example of a house 2 equipped with a dehumidifier 1. The house 2 of this embodiment is configured as, for example, an industrialized house with excellent thermal insulation performance. However, the house 2 is not limited to an industrialized house.

[0011] The house 2 of this embodiment includes an underfloor space 3, an above-floor space 4, a foundation insulation material 5, and an outside air inlet 6.

[0012] [Underfloor space] The underfloor space 3 is a space partitioned by a floor 7, a foundation 8, and a ground 9.

[0013] [floor] The floor 7 is placed on a foundation 8. The floor 7 in this embodiment is configured as flooring in which a plurality of plank panels are arranged, but is not particularly limited to this.

[0014] [Basic] The foundation 8 is disposed continuously around the perimeter of the house 2. The foundation 8 of this embodiment is configured as, for example, a strip footing made of reinforced concrete, but is not particularly limited thereto and may also be a mat footing.

[0015] The foundation 8 of this embodiment is configured to include a base portion 10 and a rising portion 11. The base portion 10 extends horizontally underground. The rising portion 11 extends upward from near the center of the base portion 10 in the width direction.

[0016] The foundation 8 of this embodiment is configured to include a first portion 8A and a second portion 8B. The first portion 8A is for supporting a first exterior wall 15A among the exterior walls 15 that constitute the house 2. On the other hand, the second portion 8B is for supporting a second exterior wall 15B among the exterior walls 15 that constitute the house 2. In this embodiment, the second exterior wall 15B is provided opposite the first exterior wall 15A, but this is not limited to this configuration and may, for example, be arranged in an L-shape with the first exterior wall 15A.

[0017] [ground] The ground 9 forms the bottom surface of the underfloor space 3. In this embodiment, a concrete floor 12 is laid between the first portion 8A and the second portion 8B of the ground 9. This concrete floor 12 does not have substantial heat insulating properties, and no heat insulating material is provided. Heat exchange between the air in the underfloor space 3 (hereinafter sometimes referred to as "underfloor air") Au and geothermal heat H, which experiences little temperature change throughout the year, can be achieved through this concrete floor 12 (ground 9).

[0018] [Floor space] The above-floor space 4 is provided on a floor 7. The above-floor space 4 in this embodiment includes a living room 13 and a non-living room (not shown).

[0019] The above-floor space 4 is partitioned by, for example, a floor 7, a ceiling 14, exterior walls 15, and partition walls (not shown). The exterior walls 15 of this embodiment include the first exterior wall 15A and the second exterior wall 15B described above. The ceiling 14 of this embodiment extends horizontally between the first exterior wall 15A and the second exterior wall 15B.

[0020] In this embodiment, the exterior walls 15 (including the first exterior wall 15A and the second exterior wall 15B) and the ceiling 14 are provided with insulation material (not shown) for insulating them from the outdoors 17 and the attic 18. Therefore, the above-floor space 4 is configured as an insulated space. For example, polystyrene foam or the like can be used as the insulation material.

[0021] An exhaust fan 19 may be provided in the above-floor space 4 to exhaust the air in the above-floor space 4 (hereinafter sometimes simply referred to as "above-floor air") Ai to the outdoors 17. The air volume of the exhaust fan 19 can be set appropriately. In this embodiment, it is preferable to set the air volume of the exhaust fan 19 based on the ventilation rate required for the house 2 (for example, 0.5 times / h).

[0022] [Basic insulation] The foundation heat insulating material 5 is provided on the foundation 8 to insulate the underfloor space 3 from the outside air. Such foundation heat insulating material 5 reduces temperature changes in the underfloor air Au.

[0023] The foundation insulation 5 of this embodiment extends vertically along the side surface of the rising portion 11 of the foundation 8 on the underfloor space 3 side. For example, polystyrene foam or the like can be appropriately used for this foundation insulation 5.

[0024] [Outside air intake] The outside air inlet 6 is for introducing outside air Ao for ventilation into the underfloor space 3. The outside air inlet 6 is formed in the foundation 8.

[0025] The outside air inlet 6 in this embodiment is formed by a hole that penetrates the first portion 8A (rising portion 11) and the foundation insulation material 5. In this embodiment, one outside air inlet 6 is provided, but this is not limited to this. For example, multiple outside air inlets 6 may be provided depending on the size of the underfloor space 3 and the above-floor space 4, the number of ventilations required for the house 2, etc.

[0026] [Dehumidifier] The dehumidifier 1 includes a heat pump type dehumidifier 21 and an air supply device 22.

[0027] [Heat pump dehumidifier] The heat pump type dehumidifier (hereinafter sometimes referred to as "dehumidifier") 21 is for dehumidifying the outside air Ao or underfloor air Au taken in through the outside air inlet 6. A known dehumidifier is used for this dehumidifier 21. In this embodiment, the dehumidifier 21 is mainly operated in the summer when the outside air is hot and humid, but this is not particularly limited.

[0028] 2 is a conceptual diagram showing an example of a heat pump type dehumidifier 21. The dehumidifier 21 of this embodiment includes a cooler (evaporator) 23 and a radiator (condenser) 24. The cooler 23 and the radiator 24 are arranged along the air flow direction, and are connected to a compressor 25 and an expansion valve 26.

[0029] In dehumidifier 21 of this embodiment, cooler 23, radiator 24, compressor 25, and expansion valve 26 are housed in housing 27. Housing 27 is provided with intake port 27i through which air to be dehumidified is taken in, and outlet port 27o through which dehumidified air (hereinafter sometimes referred to as "dehumidified air") Ad is discharged. A filter 39 may be disposed in intake port 27i to filter out dust and the like contained in the air to be dehumidified (outside air Ao in this example).

[0030] In this embodiment, when the operation of the dehumidifier 21 is started, the outside air Ao or the under-floor air Au is taken into the housing 27 through the inlet 27i. The outside air Ao or the under-floor air Au taken into the housing 27 is cooled by the cooler 23, causing condensation. In this way, the outside air Ao or the under-floor air Au can be cooled and dehumidified. Note that water droplets 40 generated by the condensation are preferably discharged, for example, to the outdoors 17 (shown in FIG. 1 ).

[0031] Next, in the dehumidifier 21 of this embodiment, the cooled and dehumidified air is heated in the radiator 24 by utilizing the heat of condensation of the refrigerant. As a result, the dehumidifier 21 can effectively lower the relative humidity of the dehumidified air Ad while preventing a decrease in the temperature of the dehumidified air Ad, compared to when, for example, an air conditioner (not shown) capable of cooling and dehumidifying operation is used. The dehumidified air Ad is discharged from the discharge port 27o of the dehumidifier 21 into the underfloor space 3 (shown in FIG. 1).

[0032] When the operation of the dehumidifier 21 is stopped, the outside air Ao or underfloor air Au taken into the housing 27 through the inlet 27i is discharged directly into the underfloor space 3 (shown in FIG. 1) through the outlet 27o without being cooled by the cooler 23 or heated by the radiator 24. This can prevent the outside air Ao or underfloor air Au from being dehumidified.

[0033] The dehumidifier 21 can be disposed appropriately as long as it can dehumidify the outside air Ao or the underfloor air Au. As shown in Fig. 1, the dehumidifier 21 of this embodiment is preferably disposed adjacent to the first portion 8A. This allows the dehumidifier 21 to dehumidify the outside air Ao taken in through the outside air inlet 6 before it is introduced into the underfloor space 3 or at an early stage after it is introduced into the underfloor space 3, and supply the dehumidified air Ad to the underfloor space 3. This allows the underfloor space 3 to be efficiently dehumidified, and condensation in the underfloor space 3 to be suppressed.

[0034] The dehumidifier 21 of this embodiment is disposed so as to face the outside air inlet 6. This allows the outside air Ao introduced from the outside air inlet 6 to be directly dehumidified before it is introduced into the underfloor space 3. Therefore, the underfloor space 3 can be more efficiently dehumidified.

[0035] Note that if the dehumidifier 21 is arranged to face the outside air inlet 6, air resistance between the outside air inlet 6 and the underfloor space 3 increases. Therefore, in order to smoothly supply the outside air Ao to the underfloor space 3 via the dehumidifier 21, the outside air inlet 6 may be provided with a fan 28 for pressurizing the outside air Ao to the dehumidifier 21. In this specification, a "fan" is a machine for pressurizing and sending air. Therefore, the fan 28 and the air supply fan 30 described below are not particularly limited as long as they are capable of pressurizing and sending air.

[0036] In this embodiment, operation of the fan 28 allows the outside air Ao introduced through the outside air inlet 6 to be smoothly supplied to the dehumidifier 21. This allows the dehumidifier 21 to efficiently supply dehumidified air Ad obtained by dehumidifying the outside air Ao to the underfloor space 3. The airflow rate of the fan 28 can be set as appropriate. In this embodiment, the airflow rate of the fan 28 can be set based on the ventilation rate required for the house 2.

[0037] [Air supply device] The air supply device 22 is for supplying air (underfloor air) Au from the underfloor space 3 to the above-floor space 4. The air supply device 22 of this embodiment is configured to include an air flow path 29 and an air supply fan 30.

[0038] The air flow path 29 in this embodiment is configured, for example, by a duct arranged in the piping space of the house 2. Note that the air flow path 29 is not limited to a duct, and may be configured, for example, by a space (not shown) surrounded by a partition wall or the like.

[0039] An air intake port 29i for taking in under-floor air Au is provided at one end of the air flow path 29. This air intake port 29i is provided in the under-floor space 3. Meanwhile, an exhaust port 29o for supplying under-floor air Au is provided at the other end of the air flow path 29. This exhaust port 29o is provided in the above-floor space 4. The under-floor space 3 and the above-floor space 4 can be connected by this air flow path 29.

[0040] The air supply fan 30 of this embodiment is for pressurizing and sending underfloor air Au to the air flow path 29 (above-floor space 4). The air supply fan 30 of this embodiment is arranged on the air supply port 29i side in the air flow path 29, but is not particularly limited thereto.

[0041] The air supply device 22 of this embodiment can supply underfloor air Au containing outside air Ao to the above-floor space 4 via the air flow path 29 by operating the air supply fan 30. This can ventilate the above-floor space 4. Furthermore, while the dehumidifier 21 is operating, dehumidified air Ad is supplied from the dehumidifier 21 to the under-floor space 3. By supplying this dehumidified air Ad to the above-floor space 4, the above-floor space 4 can be dehumidified while being ventilated.

[0042] The air volume of the air supply fan 30 can be set appropriately. In this embodiment, similar to the fan 28, the air volume of the air supply fan 30 is preferably set based on the number of ventilations required for the house 2.

[0043] In the house 2 (dehumidifier 1) of this embodiment, a heat pump type dehumidifier 21 is used to dehumidify the outside air Ao or the underfloor air Au, so a drop in the temperature of the dehumidified air Ad is prevented compared to when, for example, an air conditioner (not shown) capable of cooling and dehumidifying operation is used. By supplying such dehumidified air Ad to the above-floor space 4 via the air supply device 22, it is possible to prevent the room temperature in the above-floor space 4 from becoming lower than necessary.

[0044] On the other hand, the temperature of the dehumidified air Ad rises as it is dehumidified by the heat pump dehumidifier 21. For example, if the temperature of the air before dehumidification (outdoor air Ao or underfloor air Au) is 26 to 30°C, the temperature of the dehumidified air Ad rises to approximately 31 to 35°C. If such heated dehumidified air Ad is supplied as is to the above-floor space 4, for example, the room temperature of the above-floor space 4 may become higher than necessary.

[0045] [Heat exchange path] The house 2 of this embodiment includes a heat exchange path 31 for exchanging heat between the air dehumidified by the dehumidifier 21 (dehumidified air) and geothermal heat H. As described above, the ground 9 (concrete floor 12) of this embodiment allows heat exchange between the underfloor air Au and geothermal heat H (e.g., 10 to 20°C). Furthermore, in this embodiment, the dehumidifier 21 is provided at a distance from the air supply device 22 (air supply fan 30) and the air supply port 29i. Therefore, the underfloor air Au containing the dehumidified air Ad supplied from the dehumidifier 21 is guided to the air supply port 29i of the air supply device 22 while exchanging heat with the geothermal heat H in the ground 9 (concrete floor 12). As a result, a heat exchange path 31 for exchanging heat between the dehumidified air Ad and geothermal heat H is formed between the dehumidifier 21 and the air supply device 22 in the underfloor space 3.

[0046] In this way, in the house 2 (dehumidifier 1) of this embodiment, heat exchange takes place between the dehumidified air Ad and geothermal heat H in the heat exchange path 31, so that the temperature rise of the underfloor air Au (dehumidified air Ad) caused by dehumidification is offset by the temperature drop caused by heat exchange with geothermal heat H. By supplying such underfloor air Au to the above-floor space 4 via the air supply device 22, it becomes possible to dehumidify the above-floor space 4 while suppressing changes in the room temperature.

[0047] To effectively suppress changes in room temperature in the above-floor space 4, it is effective to efficiently perform the heat exchange as described above. Therefore, it is preferable that the heat exchange path 31 be formed over a wide area. When the dehumidifier 21 is disposed adjacent to the first portion 8A, as in this embodiment, it is preferable that the heat exchange path 31 extend to the vicinity of the second portion 8B. Such heat exchange path 31 allows heat exchange between the dehumidified air Ad and the geothermal heat H to occur over a wide area, thereby effectively suppressing changes in room temperature. Furthermore, in this embodiment, the first outer wall 15A and the second outer wall 15B are disposed opposite each other, and the first portion 8A and the second portion 8B that support them are also disposed opposite each other, so the heat exchange path 31 is formed linearly. As a result, compared to, for example, a case in which the first portion 8A and the second portion 8B are disposed in an L-shape, heat exchange between the dehumidified air Ad and the geothermal heat H can be performed over a wide area while preventing a decrease in pressure loss.

[0048] In this embodiment, the air intake device 22 (air intake fan 30) and the air intake port 29i that take in the underfloor air Au are arranged adjacent to the second portion 8B. This allows a heat exchange path 31 to be formed between the vicinity of the first portion 8A, adjacent to which the dehumidifier 21 is provided, and the vicinity of the second portion 8B.

[0049] In addition, the C value of House 2, which is the equivalent gap area of ​​the entire house (hereinafter referred to as the "C value of the entire house"), is 5.0 cm 2 / m 2 It is preferable to set it as follows. The C value of the entire house is determined appropriately depending on the configuration of the house 2. When insulation (including foundation insulation 5) is provided in the ceiling 14, exterior walls 15, and foundation 8, as in the house 2 of this embodiment, an airtight line (not shown) connecting the ceiling 14, exterior walls, and foundation 8 can be identified. The total value of the gap area on this airtight line is divided by the floor area of ​​the house 2 to determine the C value of the entire house.

[0050] The C value for the entire house is 5.0 cm 2 / m 2 By setting the C value at or below 4.0 cm3, it is possible to prevent high humidity and high temperature outside air from entering the house 2. This makes it possible to effectively dehumidify the house 2 while suppressing changes in room temperature in the house 2 in which the dehumidifier 21 is operating. In order to effectively exert this effect, the C value of the entire house is preferably 4.0 cm3 or less. 2 / m 2 The following is the result.

[0051] The equivalent gap area of ​​the underfloor space 3 (hereinafter sometimes referred to as the "C value of the underfloor space") is preferably set to less than 20% of the C value of the entire house. The C value of the underfloor space is determined appropriately depending on the configuration of the underfloor space 3. When foundation insulation 5 is provided on the foundation 8 as in this embodiment, an airtight line (not shown) formed by the foundation 8 can be identified. The C value of the underfloor space is determined by dividing the total gap area on this airtight line by the area of ​​the underfloor space 3 of the house 2 (underfloor area).

[0052] By setting the C-value of the underfloor space to less than 20% of the C-value of the entire house, it is possible to prevent high-humidity and high-temperature outside air Ao from entering the above-floor space 4 through gaps other than the outside-air inlet 6. This suppresses increases in temperature and humidity of the air (under-floor air) Au in the under-floor space 3 to which the dehumidified air Ad is supplied, making it possible to effectively dehumidify the above-floor space 4 to which the under-floor air Au is supplied while suppressing changes in the room temperature. To effectively exert this effect, the C-value of the under-floor space is preferably less than 15% of the C-value of the entire house.

[0053] [House (second embodiment)] In the above-described embodiments, the foundation 8 includes a first portion 8A and a second portion 8B, but is not limited to such an embodiment. Fig. 3 is a cross-sectional view conceptually illustrating an example of a house 2 according to another embodiment of the present invention.

[0054] The foundation 8 of this embodiment may further include a third portion 8C disposed between the first outer wall 15A and the second outer wall 15B.

[0055] In this embodiment, the third portion 8C divides the underfloor space 3 into a first space 3A on the first portion 8A side and a second space 3B on the second portion 8B side. A manway 32 is formed in this third portion 8C. This manway 32 allows the underfloor air Au to pass between the first space 3A and the second space 3B.

[0056] The first space 3A is provided with an outside air inlet 6 and a heat pump type dehumidifier 21. The outside air inlet 6 of this embodiment is formed by a hole penetrating the first portion 8A (rising portion 11) and the basic insulation material 5, as in the previous embodiments.

[0057] As in the previous embodiments, the dehumidifier 21 in this embodiment is preferably disposed adjacent to the first portion 8A. This allows the outside air Ao taken in through the outside air inlet 6 to be dehumidified before being introduced into the underfloor space 3 or at an early stage after being introduced into the underfloor space 3, thereby suppressing condensation in the underfloor space 3. Furthermore, in this embodiment, as in the previous embodiments, the dehumidifier 21 is preferably disposed so as to face the outside air inlet 6.

[0058] An air supply device 22 (air supply fan 30) and its air supply port 29i are provided in the second space 3B. In this embodiment, as in the previous embodiments, the air supply device 22 and its air supply port 29i are provided adjacent to the second section 8B. As a result, a heat exchange path 31 is formed from the vicinity of the first section 8A, to which the dehumidifier 21 is provided adjacent, via the manway 32, to the vicinity of the second section 8B. This heat exchange path 31 allows heat exchange between the dehumidified air Ad and geothermal heat H to take place over a wide area.

[0059] [How to dehumidify your home] Next, a method for dehumidifying a house 2 (hereinafter sometimes referred to as a "dehumidification method") will be described. In the dehumidification method of this embodiment, the house 2 is dehumidified using a dehumidifier 1 (heat pump type dehumidifier 21 and air supply device 22) shown in Figs. 1 and 3. The dehumidification method of this embodiment is performed by a control device 33, but is not particularly limited thereto, and may also be performed by a resident.

[0060] [Control device] The control device 33 of this embodiment is capable of controlling the dehumidifier 1 (including the heat pump type dehumidifier 21 and the air supply device 22) and the fan 28. The control device 33 may also be capable of controlling the exhaust fan 19. The control device 33 of this embodiment is configured by a computer and is installed, for example, on a partition wall or the like.

[0061] 4 is a conceptual diagram showing an example of the configuration of the control device 33. The control device 33 is configured to include, for example, a processing unit (CPU) 34, a storage device 35 for storing processing procedures and the like, and a working memory 36 for reading the processing procedures and the like from the storage device 35.

[0062] An input device 37 and an output device 38 are connected to the control device 33 (arithmetic device 34). The input device 37 is configured with operation buttons, a touch panel, etc. (not shown) provided on the housing of the control device 33 shown in FIG. 1. For example, data (information) input by a user (resident) or the like can be transmitted to the control device 33 by such input device 37. On the other hand, the output device 38 is configured as a display (not shown) provided on the housing of the control device 33 shown in FIG. 1. When such output device 38 receives data from the control device 33, it can display, for example, the operating status of the dehumidifier 21.

[0063] [Arithmetic device] The arithmetic device 34 of this embodiment is configured by, for example, a CPU (Central Processing Unit). The arithmetic device 34 of this embodiment is connected to be able to communicate with the exhaust fan 19, the heat pump type dehumidifier 21, the fan 28, and the supply air fan 30. This allows the arithmetic device 34 to grasp the operating status of the exhaust fan 19, the dehumidifier 21, the fan 28, and the supply air fan 30. Furthermore, the operation (including, for example, starting and stopping of operation) of the exhaust fan 19, the dehumidifier 21, the fan 28, and the supply air fan 30 can be controlled by the arithmetic device 34. Figure 5 is a flowchart showing an example of the processing procedure of a house dehumidification method.

[0064] [Introducing outside air into the underfloor space] In the dehumidification method of this embodiment, first, outside air Ao is introduced into the underfloor space 3 of the house 2, which is an insulated space shown in Fig. 1 (step S1). In step S1 of this embodiment, the control device 33 starts operation of the fan 28 provided in the outside air inlet 6. If operation of the fan 28 has already started, the fan 28 continues to operate.

[0065] In step S1 of the present embodiment, operation of the fan 28 is started, and thus outside air Ao can be introduced into the underfloor space 3 through the outside air inlet 6. The airflow rate of the fan 28 can be set based on the ventilation rate required for the house 2, for example.

[0066] [Determine whether it is currently summer or not] Next, in the dehumidification method of this embodiment, it is determined whether the current season is summer or not (step S2), as shown in Fig. 5. In this embodiment, the determination of whether the current season is summer or not is made by the control device 33 (shown in Fig. 1), but this is not particularly limited, and may be made by a resident of the house 2, for example.

[0067] The current season may be determined based on, for example, a calendar set in the control device 33, or based on the outside air temperature, etc. The period that falls under the summer season is set appropriately depending on the region of the house 2. In this embodiment, June to August are considered to be summer seasons, and September to May are considered to be non-summer seasons, but this is not particularly limited.

[0068] If it is determined that the current season is summer ("Yes" in step S2), it is determined that dehumidification is necessary in house 2. In this case, steps S3 to S5 are performed. Note that the order in which steps S3 to S5 are performed is not particularly limited, and for example, they may be performed simultaneously.

[0069] On the other hand, if it is determined that the current season is not summer ("No" in step S2), it is determined that dehumidification is not necessary in house 2. In this case, steps S6 to S8 are performed. The order in which steps S6 to S8 are performed is not particularly limited, and for example, they may be performed simultaneously.

[0070] [Dehumidify using a heat pump dehumidifier] Next, in the dehumidification method of this embodiment, the outside air Ao introduced into the underfloor space 3 shown in FIG. 1 or the air in the underfloor space (underfloor air) Au is dehumidified by the heat pump dehumidifier 21 (step S3).

[0071] In step S3 of this embodiment, the control device 33 starts the operation of the heat pump type dehumidifier 21. If the operation of the dehumidifier 21 has already started, the dehumidifier 21 continues to operate.

[0072] In step S3 of the present embodiment, the dehumidifier 21 operates to take in outside air Ao or underfloor air Au into the housing 27 through the inlet 27i shown in FIG. 2 and cool it in the cooler 23. As a result, condensation occurs on the outside air Ao or underfloor air Au, and the air can be cooled and dehumidified. Furthermore, the cooled and dehumidified air is heated in the radiator 24. As a result, in step S3, the relative humidity of the dehumidified air Ad can be effectively lowered while preventing a decrease in the temperature of the dehumidified air Ad compared to when, for example, an air conditioner (not shown) is used for cooling and dehumidifying operation. The dehumidified air Ad is supplied to the underfloor space 3 (shown in FIG. 1) from the outlet 27o of the dehumidifier 21.

[0073] [Heat exchange between dehumidified air and geothermal energy] Next, in the dehumidification method of this embodiment, as shown in FIG. 1, the air (dehumidified air) Ad dehumidified by the dehumidifier 21 is heat exchanged with geothermal heat H in the underfloor space 3 (step S4).

[0074] In step S4 of this embodiment, the dehumidified air Ad supplied from the dehumidifier 21 to the underfloor space 3 exchanges heat with geothermal heat H in the heat exchange path 31 made up of the ground 9 (concrete floor 12). As a result, the temperature increase of the dehumidified air Ad caused by dehumidification by the heat pump type dehumidifier 21 can be offset by the temperature decrease caused by the heat exchange with geothermal heat H.

[0075] [Supplying heat-exchanged air to the space above the floor] Next, in the dehumidification method of this embodiment, the air (dehumidified air) Ad that has been heat exchanged with the geothermal heat H is supplied to the above-floor space 4 of the house 2 (step S5).

[0076] In step S5 of this embodiment, the control device 33 starts operation of the air supply fan 30 of the air supply device 22. If operation of the air supply fan 30 has already started, the air supply fan 30 continues to operate. The air volume of the air supply fan 30 can be set based on, for example, the number of ventilations required for the house 2.

[0077] In step S5 of this embodiment, the air supply fan 30 is operated to supply air (dehumidified air) Ad that has exchanged heat with geothermal heat H to the above-floor space 4 via the air flow path 29. As described above, the dehumidified air Ad that has exchanged heat with geothermal heat H has a temperature increase in the dehumidified air Ad due to dehumidification by the heat pump dehumidifier 21 offset by a temperature decrease due to heat exchange with geothermal heat H. By supplying such dehumidified air Ad to the above-floor space 4, it is possible to dehumidify the above-floor space 4 while suppressing changes in the room temperature. Furthermore, in this embodiment, the dehumidified air Ad is generated by dehumidifying the outside air Ao or the under-floor air Au that contains the outside air Ao, and therefore by supplying such dehumidified air Ad to the above-floor space 4, it is possible to dehumidify the above-floor space 4 while ventilating it.

[0078] In step S5 of this embodiment, the control device 33 may start operating the exhaust fan 19. This causes the above-floor air Ai to be exhausted to the outdoors 17, so that the above-floor space 4 can be efficiently ventilated.

[0079] [Stop operation of heat pump dehumidifier] Next, in the dehumidification method of this embodiment, if it is determined that the current season is not summer ("No" in step S2), the operation of the heat pump type dehumidifier 21 is stopped (step S6).

[0080] In step S6 of the present embodiment, the control device 33 stops the operation of the dehumidifier 21. If the operation of the dehumidifier 21 has already been stopped, the operation of the dehumidifier 21 continues to be stopped. This can prevent the outdoor air Ao or the underfloor air Au from being dehumidified in seasons when dehumidification is not necessary.

[0081] [Heat exchange between outside air and geothermal energy] Next, in the dehumidification method of this embodiment, the outside air Ao is heat exchanged with geothermal heat H in the underfloor space 3 (step S7). In step S7 of this embodiment, the outside air Ao supplied to the underfloor space 3 from the outside air inlet 6 via the dehumidifier 21 is heat exchanged with geothermal heat H in the heat exchange path 31 made of the ground 9 (concrete floor 12). As a result, for example, in winter, the low-temperature outside air Ao is heated by geothermal heat H, and the heated outside air Ao is supplied to the abovefloor space 4, thereby reducing the air conditioning load.

[0082] [Supplying heat-exchanged air to the space above the floor] Next, in the dehumidification method of this embodiment, the air (outside air) Ao that has been heat exchanged with the geothermal heat H is supplied to the above-floor space 4 of the house 2 (step S8).

[0083] In step S8 of this embodiment, the control device 33 operates the air supply fan 30. If the operation of the air supply fan 30 has already started, the air supply fan 30 continues to operate.

[0084] In step S8 of this embodiment, the air supply fan 30 is operated, and the air (outside air) Ao that has exchanged heat with geothermal heat H in the underfloor space 3 is supplied to the above-floor space 4 via the air flow path 29 without being dehumidified by the dehumidifier 21. As described above, in winter, the low-temperature outside air Ao is heated by geothermal heat H. By supplying such outside air Ao to the above-floor space 4, the above-floor space 4 can be ventilated while preventing the above-floor space 4 from drying out and increasing the air-conditioning load.

[0085] In step S8, the control device 33 may start operating the exhaust fan 19. This causes the above-floor air Ai to be exhausted to the outdoors 17, so that the above-floor space 4 can be ventilated efficiently.

[0086] [Determine whether or not to instruct the dehumidifier to stop operating] Next, in the dehumidification method of this embodiment, the control device 33 determines whether or not there is an instruction to stop operation of the dehumidifier 1 (including the heat pump dehumidifier 21 and the air supply device 22) (step S9). The determination of whether or not there is an instruction to stop operation is made based on, for example, instruction information input by a user (resident) or the like to the input device 37 (shown in FIG. 4) or the occurrence of an abnormal termination of an interrupt process or the like.

[0087] If it is determined that there is an instruction to stop operation of the dehumidifier 1 ("Yes" in step S9), step S10 is performed to stop operation of the dehumidifier 1. On the other hand, if it is determined that there is no instruction to stop operation of the dehumidifier 1 ("No" in step S9), steps S2 to S9 are performed again.

[0088] In the dehumidification method of this embodiment, the operation of the heat pump dehumidifier 21 is switched on and off depending on the current season. As a result, in the summer when dehumidification is necessary, it is possible to dehumidify while suppressing changes in room temperature. On the other hand, in seasons when dehumidification is not necessary (such as winter), unnecessary dehumidification is prevented, making it possible to ventilate the above-floor space 4 while preventing it from drying out and increasing the air conditioning load.

[0089] [Stop the dehumidifier] Next, in the dehumidification method of this embodiment, operation of the dehumidifier 1 (including the heat pump type dehumidifier 21 and the air supply device 22) is stopped (step S10). In step S10 of this embodiment, the control device 33 stops operation of the heat pump type dehumidifier 21 and the air supply device 22 (air supply fan 30) included in the dehumidifier 1. Note that if operation of the dehumidifier 21 and the air supply fan 30 has already been stopped, operation of the dehumidifier 21 and the air supply fan 30 continues to be stopped. Note that operation of the air supply fan 30 and fan 28 may continue to be continued in order to continuously ventilate the above-floor space 4.

[0090] Although a particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the illustrated embodiment and can be modified and implemented in various ways. [Example]

[0091] A house equipped with the heat pump type dehumidifier, air supply device, and heat exchange path shown in Figure 1 was input into a computer as a model that can be handled by a computer (Example). In the Example, dehumidified air that had exchanged heat with geothermal heat in the heat exchange path was supplied to the space above the floor.

[0092] 6(a) is a cross-sectional view showing a house of Comparative Example 1. FIG. 6(b) is a cross-sectional view showing a house of Comparative Example 2.

[0093] As shown in Figure 6(a), a house in which the air in the underfloor space is dehumidified by a heat pump dehumidifier and the dehumidified air is supplied to the above-floor space without heat exchange with geothermal energy was input into a computer as a model that can be handled by a computer (Comparative Example 1).Furthermore, as shown in Figure 6(b), a house in which the outside air is dehumidified by a heat pump dehumidifier and the dehumidified air is supplied to the above-floor space without heat exchange with geothermal energy was input into a computer as a model that can be handled by a computer (Comparative Example 2).

[0094] The temperature, absolute humidity, and specific enthalpy of the dehumidified air supplied to the above-floor space were calculated by annual temperature simulation based on the unsteady heat conduction equation for the Example, Comparative Example 1, and Comparative Example 2, and the average values ​​for August were compared. The common specifications, such as the specifications of the house and the target values ​​for outdoor air and indoors, are as follows: Housing: Floor area: 123.04m 2 Underfloor area: 62.77m 2 Ventilation volume (summer): 195m 3 / h Ventilation volume (winter): 156m 3 / h Base insulation: XPS (thickness: 90mm) Ground surface temperature: The temperature at 10m underground is calculated based on the average annual temperature of the outside air (Osaka AMeDAS standard annual temperature) (2001-2010) Outside air: AMeDAS standard year (2001-2010) Osaka weather data Temperature: 28.4℃ Absolute humidity: 15.9g / kg Specific enthalpy: 69.1kJ / kg Indoor: 18-27℃ Annual periodic steady state conditions Target temperature: 26.8℃ Target absolute humidity: 13.3g / kg Target specific enthalpy: 60.9 kJ / kg Table 1 shows the average values ​​of the temperature, absolute humidity and specific enthalpy of the dehumidified air in August for Example, Comparative Example 1 and Comparative Example 2.

[0095] [Table 1]

[0096] As a result of the test, the temperature, absolute humidity, and specific enthalpy of the dehumidified air supplied to the above-floor space in the Example were closer to the target temperature, target absolute humidity, and target specific enthalpy than in Comparative Examples 1 and 2. Therefore, it was confirmed that the Example can dehumidify while suppressing changes in room temperature compared to Comparative Examples 1 and 2.

[0097] [Note] The present invention includes the following aspects.

[0098] [Invention 1] It is a house, an underfloor space, which is a space partitioned by the floor, foundation, and ground; A floor space that is an insulated space provided above the floor; a foundation insulation material provided in the foundation to insulate the underfloor space from outside air; an outside air inlet formed in the foundation for introducing outside air for ventilation into the underfloor space; a heat pump type dehumidifier for dehumidifying the outside air taken in through the outside air inlet or the air in the underfloor space; an air supply device for supplying air from the underfloor space to the above-floor space; a heat exchange path formed in the underfloor space between the dehumidifier and the air supply device, for exchanging heat between the air dehumidified by the dehumidifier and geothermal heat; Including, Housing. [Invention 2] The foundation includes a first portion supporting a first exterior wall of the house and a second portion supporting a second exterior wall of the house; the dehumidifier is disposed adjacent to the first portion; The house described in invention 1, wherein the heat exchange path extends to the vicinity of the second portion. [Invention 3] the foundation includes a third portion disposed between the first exterior wall and the second exterior wall; The third portion divides the underfloor space into a first space on the first portion side and a second space on the second portion side, The third portion has a passageway through which air can pass, The outside air inlet and the dehumidifier are provided in the first space, The house according to the present invention 2, wherein the air supply device and its air supply port are provided in the second space. [Invention 4] The house has a C value of 5.0 cm, which is the equivalent gap area of ​​the entire house. 2 / m 2 A house according to any one of the present inventions 1 to 3, which is a highly airtight house as follows: [Invention 5] 5. The house according to claim 4, wherein the equivalent gap area of ​​the underfloor space is less than 20% of the C value. [Invention 6] 6. The house according to any one of claims 1 to 5, wherein the dehumidifier is disposed so as to face the outside air inlet. [Invention 7] 7. The house according to claim 6, wherein the outside air inlet is provided with a fan for pressure-feeding the outside air to the dehumidifier. [Invention 8] an underfloor space, which is a space partitioned by the floor, foundation, and ground; A floor space that is an insulated space provided above the floor; a foundation insulation material provided in the foundation to insulate the underfloor space from outside air; a dehumidifier provided in a house, the dehumidifier including: an outside air inlet formed in the foundation for introducing outside air for ventilation into the underfloor space; a heat pump type dehumidifier for dehumidifying the outside air taken in through the outside air inlet or the air in the underfloor space; an air supply device for supplying air from the underfloor space to the above-floor space, The dehumidifier and the air supply device are arranged so that a heat exchange path is formed between them that allows the air dehumidified by the dehumidifier to exchange heat with the geothermal heat in the underfloor space. Residential dehumidifier. [Invention 9] A step of introducing outside air into an underfloor space of a house that is partitioned by a floor, a foundation, and the ground and is an insulated space; dehumidifying the outside air introduced into the underfloor space or the air in the underfloor space with a heat pump dehumidifier; a step of exchanging heat between the air dehumidified by the dehumidifier and geothermal heat in the underfloor space; supplying the heat-exchanged air to an above-floor space of the house; A method of dehumidifying a home, including: [Explanation of symbols]

[0099] 2. Housing 3 Underfloor space 4 Above-floor space 5. Basic insulation 6. Fresh air intake 7 beds 8 Basics 9 Ground 21 Dehumidifier 22 Air supply device 31 Heat exchange path

Claims

1. It is a house, an underfloor space, which is a space partitioned by the floor, foundation, and ground; A floor space that is an insulated space provided above the floor; a foundation insulation material provided in the foundation to insulate the underfloor space from outside air; an outside air inlet formed in the foundation for introducing outside air for ventilation into the underfloor space; a heat pump type dehumidifier for dehumidifying the outside air taken in through the outside air inlet or the air in the underfloor space; an air supply device for supplying air from the underfloor space to the above-floor space; a heat exchange path formed in the underfloor space between the dehumidifier and the air supply device, for exchanging heat between the air dehumidified by the dehumidifier and geothermal heat; Including, Housing.

2. the foundation includes a first portion supporting a first exterior wall of the house and a second portion supporting a second exterior wall of the house; the dehumidifier is disposed adjacent to the first portion; The house of claim 1 , wherein the heat exchange path extends to a vicinity of the second portion.

3. the foundation includes a third portion disposed between the first exterior wall and the second exterior wall; the third portion divides the underfloor space into a first space on the first portion side and a second space on the second portion side, The third portion has a passageway through which air can pass, The outside air inlet and the dehumidifier are provided in the first space, The house according to claim 2 , wherein the air supply device and its air supply port are provided in the second space.

4. The house has a C value of 5.0 cm, which is the equivalent gap area of ​​the entire house. 2 / m 2 The house according to any one of claims 1 to 3, which is a highly airtight house as follows:

5. The house according to claim 4 , wherein the equivalent gap area of ​​the underfloor space is less than 20% of the C value.

6. The house according to claim 1 , wherein the dehumidifier is positioned so as to face the outside air inlet.

7. The house according to claim 6 , wherein the outside air inlet is provided with a fan for pressurizing the outside air to the dehumidifier.

8. an underfloor space, which is a space partitioned by the floor, foundation, and ground; A floor space that is an insulated space provided above the floor; a foundation insulation material provided in the foundation to insulate the underfloor space from outside air; a dehumidifier provided in a house, the dehumidifier including: an outside air inlet formed in the foundation for introducing outside air for ventilation into the underfloor space; a heat pump type dehumidifier for dehumidifying the outside air taken in through the outside air inlet or the air in the underfloor space; an air supply device for supplying air from the underfloor space to the above-floor space, The dehumidifier and the air supply device are arranged so that a heat exchange path is formed between them that allows the air dehumidified by the dehumidifier to exchange heat with the geothermal heat in the underfloor space. Residential dehumidifier.

9. A step of introducing outside air into an underfloor space of a house that is partitioned by a floor, a foundation, and the ground and is an insulated space; dehumidifying the outside air introduced into the underfloor space or the air in the underfloor space with a heat pump dehumidifier; a step of exchanging heat between the air dehumidified by the dehumidifier and geothermal heat in the underfloor space; supplying the heat-exchanged air to an above-floor space of the house; A method of dehumidifying a home, including:

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