JP2010091243A - Energy saving ventilation system and energy saving building having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy saving ventilation system that structurally simply and inexpensively improves air stagnation variations and temperature variations in an underfloor space while enhancing indoor temperature and humidity control and ventilation performance. <P>SOLUTION: The energy saving ventilation system includes a ventilation apparatus provided with a ventilation means for discharging inside air in an airtight indoor space outdoors and a supply introduction section for introducing outside air indoors, and configured to change the inside air a predetermined number of times by actuating the ventilation means. The supply introduction section comprises a supply introduction path 8 formed in an indoor underfloor space and connected to an outside air inlet 81 opening outdoors and a supply introduction port 54 opening indoors. The supply introduction path has a plurality of space sections A1-A8 divided for a flow of outside air introduced from the outside air inlet 81. An air conditioner 9A for regulating the temperature and humidity of outside air introduced from the outside air inlet is arranged in one space section A1, and the space section A1 is connected with the space section A8 situated at a downstream end. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an energy-saving ventilation system including an airtight indoor ventilation device and an energy-saving building including the energy-saving ventilation system.

  A 24-hour ventilation system has been proposed to ventilate buildings. In addition, from the viewpoint of energy saving, buildings with high airtightness and high thermal insulation are being constructed. In such an environment, a building with a living room, a highly airtight and highly insulated structure, is obliged to install a 24-hour ventilation system under the Building Standards Law, so it must be installed. On the other hand, there is a contradiction in demanding 24-hour ventilation for improving the indoor environment and high airtightness and high heat insulation for promoting energy saving.

  In other words, the 24-hour ventilation ventilates the indoor air to keep it from staying even when the indoor temperature is optimal. Therefore, the indoor air at the optimal temperature is discharged to the outside and the outside air is not adjusted in temperature and humidity. This is uneconomical from the viewpoint of indoor temperature management. On the other hand, high airtightness and high thermal insulation to block the heat from the outside and minimize the heat effect on the indoors can reduce the heat load from the outside, but the ventilation performance (Scavenging) is reduced, and for example, there is a concern about the occurrence of problems related to sick house. In order to reduce costs, it is also known that ventilation is performed by operating a ventilation device installed in, for example, a toilet or bathroom for 24 hours without installing a ventilation device for 24 hours.

  In addition, when high airtightness and high thermal insulation are used, underfloor ventilation holes are generally not installed, so that underfloor moisture is prevented so that water vapor stagnation and condensation do not occur in the underfloor space. Do it carefully. In addition, it is also important to make the underfloor space the same as indoors and to prevent the retention of water vapor under the floor.For example, a mechanical forced exhaust system is installed under the floor, and the air in the room is discharged to the outside via the underfloor. There is.

In Patent Document 1, in a building that is highly airtight and highly insulated and uses a 24-hour ventilation system and geothermal heat, outside air heated or cooled by geothermal heat is introduced into the underfloor space and discharged from indoors. A configuration is described in which the inside air is also guided to the underfloor space, heated or cooled, and supplied indoors from under the floor.
Patent Document 2 describes an air-conditioning system that circulates indoor air between an underfloor space and an indoor space or between a ceiling space and an indoor space using an indoor unit.

JP 2006-266575 A JP 2004-132680 A

In Patent Document 1, since geothermal heat is used to adjust the outside air, the cost is increased, and the second floor is made into a double floor structure to secure an air-conditioning air path and connected to the space under the floor by an air supply device. Since it is configured to send the underfloor air to the upper floor heat storage space, the structure is complicated and causes an increase in cost.
A ventilation system installed in a toilet or bathroom that operates for 24 hours does not simply plan the indoor ventilation route, just ventilate it, It is difficult to improve the stagnation and temperature unevenness. In addition, in order to secure a ventilation path, it is assumed that exhaust devices are provided at a plurality of different locations in the room. However, when collecting and using the heat of the exhausted indoor air, there are a plurality of exhaust locations. The thermal energy is dispersed and is not preferable in terms of heat recovery efficiency.

In addition, in the case of high airtightness and high thermal insulation, considering the durability of the building, it is necessary to adopt a mechanical forced exhaust system and structure for dehumidification of the underfloor space, which increases costs by introducing new equipment. There is a problem that energy consumption by the forced ventilation device and waste of indoor heat energy are caused. Also, because the indoor air is exhausted through the underfloor space, the indoor air with an increased CO2 concentration is sent to the underfloor space, which promotes the neutralization of concrete by CO2, and is an important structure for strength. It will also be a factor that causes deterioration over time. In particular, as in Patent Document 2, when indoor air is circulated by an indoor unit, if the structure is a concrete slab, neutralization is promoted, which may affect the durability of the building.
Furthermore, the indoor underfloor space is used as an air supply introduction path that communicates with an indoor intake air supply inlet, and one end of the indoor underfloor space is opened to the outside to serve as an outside air intake, and air is circulated in the underfloor space. Assuming this, the floor heating function can be expected using the heat of the air taken into the space under the floor. Alternatively, it can be assumed that an air conditioner is placed in the underfloor space to perform the floor heating function, but simply by circulating air or installing an air conditioner, air retention unevenness in the underfloor space There is concern about temperature unevenness.

  The present invention has a simple structure, low cost, indoor temperature and humidity management and ventilation performance, as well as improving the durability of the building, while improving the unevenness of air retention and temperature unevenness in the underfloor space and high efficiency. The purpose is to provide an energy-saving ventilation system and an energy-saving building that can recover heat and realize a comfortable indoor environment.

  In order to achieve the above-described object, an energy-saving ventilation system according to the present invention has at least ventilation means for discharging indoor air that has been air-tightened to the outside and an air supply introduction unit that introduces outside air from the outdoors to the inside. And a ventilation device configured to operate the ventilation means to replace indoor indoor air a predetermined number of times, and has a space portion that is divided into a plurality of parts so that the outside air introduced from the outside air intake port can circulate, An air conditioner that adjusts the temperature and humidity of the outside air introduced from the outside air intake port is arranged in one space portion, and the space portion and the air conditioner that are located on the most downstream side of the air flow introduced from the outside air intake port The space in which the device is arranged communicates.

In the energy-saving ventilation system, the air conditioner is disposed in a space located on the most upstream side of the air supply introduction path close to the outside air intake.
In the energy-saving ventilation system, the air conditioner includes a heat exchange unit that cools or heats the outside air introduced into the supply air introduction path, and a heat pump unit that is connected to the heat exchange unit, and the heat exchange unit is in the supply air introduction path. It is arrange | positioned in the inside, and the heat pump unit is arrange | positioned so as to oppose the exhaust port opened toward the outdoors of the ventilation means.

  In the energy-saving ventilation system, a path state detection unit that is disposed in a space downstream of the supply air introduction path from the space where the heat exchange unit is disposed, and detects at least one of temperature and humidity in the space; It is characterized by having a display unit connected to a path state detection unit that is disposed indoors and displays information detected by the path state detection unit.

  A feature of the energy-saving building according to the present invention is that any one of the energy-saving ventilation systems described above is provided.

  The energy-saving building is characterized in that a highly heat-insulating structure is used at least on the outer wall, the boundary floor, and the opening except the floor portion that forms the interior. Alternatively, it is characterized in that a highly heat-insulating structure is used at least on the outer wall, roof, foundation and opening except for the floor portion forming the interior.

  According to the present invention, in a highly airtight building, the underfloor space of the building is used as an air supply introduction path for taking outside air into the room, so that outside air can be taken in every room in the building as in the past. It is not necessary to provide an air supply port, and the air supply ports are connected to the air supply introduction route. Since the temperature and humidity of the outside air supplied indoors from this aggregated air supply inlet are adjusted by the air conditioner, the outside air is not directly introduced indoors from the outdoors, reducing the heat load, The indoor temperature can be adjusted efficiently, and a comfortable indoor environment can be realized. In addition, since the outdoor air intake section is limited to the air supply inlet, indoor air is exhausted to the outside by operating the ventilator, so that planned indoor ventilation can be performed. In addition to being able to achieve efficient indoor air conditioning while preventing problems due to airflow, it is possible to realize a more comfortable indoor environment, and humidity outside air is introduced into the air supply introduction path under the floor. Compared to the conventional method of circulating indoor air with high CO2 concentration by circulating outside air with low CO2 concentration through the underfloor space while eliminating the problems of highly airtight and highly insulated buildings that easily accumulate It is possible to prevent the deterioration of the structure which is important in terms of yield strength due to neutralization and to improve the durability of the building.

  According to the present invention, an indoor underfloor space is formed as a supply air introduction path having a space portion that is divided into a plurality of spaces so that outside air introduced from an outside air intake port can circulate, and is formed in at least one space portion. An air conditioner that adjusts the temperature and humidity of the outside air introduced from the outside air intake port is installed, so heat is also transferred to the building frame and floor when circulating in the space under the floor. Underfloor space where the floor can be heated, and the floor heating function can be obtained. In the rainy season when the humidity is high, the humidity under the floor can be adjusted over the entire floor, and moisture can easily accumulate. Can be effectively dehumidified. Furthermore, the air in the underfloor space is actively moved, so that the portion where the humidity tends to accumulate locally can be eliminated, and the underfloor space can be maintained in a sanitary manner.

According to the present invention, the space located on the most downstream side of the flow of air introduced from the outside air intake port communicates with the space where the air conditioner is arranged, so the temperature and humidity are adjusted by the air conditioner. Even if the temperature of the air changes during the distribution process, the air having the highest temperature change can be returned to the space where the air conditioner is installed. For this reason, retention of the air under a floor decreases, temperature can be made uniform and the temperature nonuniformity of floor heating floor cooling can be reduced. In addition, since the air in the space located on the most downstream side is supplied to the most upstream space where the air conditioner is installed among the plurality of spaces, the external air load is reduced, and the underfloor air conditioning Since the rise time of the floor can be shortened, the rise of floor cooling / floor heating can be accelerated.
Furthermore, when opening an indoor window such as an intermediate period and ventilating, air supply from the window may not supply air from the outside air intake, but in that case it was also introduced from the outside air intake. By returning air from the space located on the most downstream side of the air flow to the space where the air conditioner is located, the floor heating / floor cooling can be performed even when the air conditioner in the underfloor space has an open space in the room. Can be done.

According to the present invention, since the ventilator is obliged to be installed in the room of the building, it is not necessary to install it individually for indoor air conditioning, and the central heating of the highly airtight building is achieved while reducing costs. Can be performed. In other words, when performing central heating, air as a heat medium is distributed to every corner of the room using a duct, an air supply fan, and its control device. In the present invention, the duct, control device, and equipment are used. This eliminates the need to operate an air supply fan, greatly reducing energy consumption, enabling 24-hour central heating while reducing costs, and realizing a more comfortable indoor environment.
According to the present invention, outdoor outdoor air is adjusted indoors by an air conditioner and introduced indoors. Therefore, compared to the case where outdoor air is directly introduced indoors by providing an air supply port for each room, In addition to reducing the load, depending on the temperature setting of the outside air introduced from the supply air introduction path in the underfloor space, the installation of air conditioning equipment in each room may be unnecessary, reducing the introduction cost and reducing the heating and cooling load, and for indoor air conditioning Such energy can be suppressed.

  According to the present invention, the outside air whose temperature and humidity are adjusted by the air conditioner passes through the supply air introduction path formed in the underfloor space, and then is supplied indoors through the supply air introduction opening opened indoors. As a result, heat can be transferred to the building frame and floor in the circulation process of the outside air to store heat. For this reason, the underfloor space (supply air introduction path) functions as a buffer zone, so it is possible to absorb changes in the temperature and humidity of the outside air, and supply outside air with a stable temperature and humidity indoors, making it more comfortable. An indoor environment can be realized.

  According to the present invention, since the floor portion other than the heat exchange chamber does not have a heat insulating structure, the outside air adjusted by the air conditioner moves in the supply air introduction path formed in the underfloor space, and heat is applied to the frame and the floor. When moving, the floor can be warmed or cooled efficiently to directly increase or decrease the sensible temperature and contribute to energy saving. Therefore, a more comfortable indoor environment can be realized with energy saving.

  According to the present invention, the heat exchange unit constituting the air conditioner is arranged in the supply air introduction path, and the heat pump unit connected to the heat exchange unit is arranged to face the exhaust port opened to the outside of the ventilation device. Therefore, since the inside air collected by the ventilator for 24 hours can be continuously supplied to the heat pump unit for 24 hours, the heat supply to the heat exchange unit is always performed stably. The indoor air may become humid depending on daily activities, but naturally the ability to store heat energy will be high, and the heat energy collected by the 24-hour ventilator will be supplied to the heat pump unit, The supply of heat to the heat exchange unit will be promoted efficiently. As for the operation of the heat exchange unit, automatic operation such as temperature setting and control is naturally performed. However, since heat is always supplied to the heat pump unit, more stable energy saving operation is possible. In particular, operation at low temperatures in winter may require defrosting operation with a preheating heater or the like due to freezing. However, since indoor heat is always supplied, freezing will be prevented and preheating will be prevented. The operation of the heater can also be prevented. Further, exhaust heat reduces outdoor operation at low temperatures, and can prevent a reduction in energy consumption efficiency. In addition, the heat exchange efficiency naturally decreases with the operation at high temperatures outdoors in summer. Also in this case, since the inside air is always supplied and the exhaust heat in the room is supplied, the energy saving operation can be performed without reducing the energy consumption efficiency. This makes it possible to recover heat stably and realize energy saving.

  When the air conditioner is in cooling operation, the heat pump unit is heated by heat exchange, and is therefore cooled by indoor cold air exhausted from the outlet by the ventilator. When the air conditioner is in the heating operation, the heat pump unit is in a cooled state by heat exchange, and is thus heated by indoor warm air exhausted from the discharge port by the ventilator. For this reason, exhaust heat recovery of the inside air exhausted for ventilation by the ventilator can be performed by the heat pump unit, and the heat exchange efficiency of the air conditioner is improved, that is, the heat recovery efficiency from the exhausted inside air is increased. A comfortable indoor environment can be realized while saving energy.

  According to the present invention, the path state detection means is disposed in the space downstream of the air supply introduction path from the space where the heat exchange unit is disposed, and detects at least either temperature or humidity in the space. Since the detected information is displayed on the display means provided indoors, the occupant can check the status of the underfloor space, so that the air conditioner can be arbitrarily turned on and off, and the route The operation of the air conditioner may be automatically controlled based on the information detected by the state detection means.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of a two-story wooden detached house (hereinafter referred to as “wooden house”) which is an example of an energy-saving building to which the present invention is applied. In FIG. 1, a wooden house is composed of a building base 1 and a frame 2 made of concrete. The housing 2 provided on the building foundation 1 is composed of well-known structural members such as columns, beams, walls, and the like, and the inside is an indoor 3. This wooden house is provided with a plurality of openings 20 such as windows, and each opening 20 is configured with high airtightness and high heat insulation. The indoor 3 is airtight and highly insulated except for a part of the floor 4. As a method of increasing heat insulation, an outer insulation method is used, and the heat insulating material is the foundation of the house, the outer wall and the roof except for the floor 4 and the building foundation 1 other than the floor above the heat exchange chamber described later. Equipped to the part.

  This house is equipped with an energy saving ventilation system 100. The energy saving ventilation system 100 includes a 24-hour ventilation device 5, an air supply introduction unit that introduces outside air from the outside to the inside, and an air conditioner 9. As shown in FIGS. 3 and 4, the 24-hour ventilation device 5 includes an exhaust duct 52 that communicates with an exhaust port 51 provided in each room, and a ventilation means 53 that is disposed on the route of the exhaust duct 52. And an outside air inlet 54 connected to the outside. The end of the exhaust duct 52 is open to the outdoors and serves as an outdoor exhaust port 55. In the present embodiment, the outside air introduction port 54 is provided, for example, under the stairs 6, but may be appropriately provided under the counter or under the living room, and is not limited to the bottom of the stairs 6. The ventilation means 53 is a well-known device that sucks indoor air when the fan is rotated by a motor. The air intake and outdoor air outlets are arranged so that they do not affect each other, and consideration is given to preventing contaminated exhaust from returning to the room.

  For this reason, when the ventilation means 53 of the 24-hour ventilator 5 is activated, the indoor 3 is negatively pressured, and the inside air is sucked from the exhaust ports 51 provided in the respective living rooms and is discharged from the outdoor exhaust port 55 via the exhaust duct 52 to the outside. Indoor air is performed by the outside air being introduced from the outside air inlet 54. The 24-hour ventilation device 5 is configured to change the inside air of the indoor 3 a predetermined number of times in one day by operating the ventilation means 53, for example. The code | symbol 10 shows the range hood installed in the kitchen. When operating the range hood 10 of this kitchen, the air-conditioned air in the indoor 3 is also exhausted. Since the range hood 10 has a high exhaust capacity, if the indoor air-conditioned air is discharged, it goes against energy saving. Therefore, the intake port 101 for the range hood is installed in the kitchen so as to ensure a dedicated ventilation path in the shortest time. For this reason, the discharge | emission of the air-conditioning air of the indoor 3 is suppressed, and the waste of indoor air-conditioning energy can be prevented.

  A feature of the house according to the present embodiment is that one of the air supply introduction paths 8 in which an air supply introduction part for introducing outside air from the outside to the indoor 3 is formed in an underfloor space formed between the building foundation part 1 and the floor 4. The air conditioner 9 is installed in the supply air introduction path 8, the temperature and humidity of the outside air taken into the passage is adjusted by the air conditioner 9, and the ventilation means 53 is activated to introduce the outside air. It has a central heating structure that is introduced indoors through the mouth 54 and is air-conditioned simultaneously with the ventilation of the indoor 3.

  As shown in FIG. 2, the air supply introduction path 8 includes an external air supply port 81 serving as an external air intake port that is open to communicate with the outdoors at the rising portion of the building foundation 1, and an air supply under the stairs. It is formed so as to be connected to the introduction port 54. As shown in FIG. 2, the building foundation portion 1 is divided into a plurality so as to match at least the shape of the living room on the first floor of the building, and a plurality of space portions A1 to A8 are formed under the floor 4. In the case of a highly airtight house, since the floor 4 is installed on the building foundation 1, there is no gap between the building foundation 1 and the floor 4, and the air supply introduction path 8 is also divided. Therefore, the hole 82 which forms a flow path is formed in the rising part 1A adjacent to each other of the divided building foundation 1. Since a hole for passing a drain pipe or a gas pipe is formed in the rising portion 1A when the building foundation 1 is molded with concrete, the hole 82 may be formed together at this time. By forming the hole 82 in the rising portion 1A, the external air supply port 81 communicates with the air supply port 54.

As shown in FIG. 1, the air conditioner 9 includes a heat exchange unit 9 </ b> A that cools or heats the outside air introduced into the supply air introduction path 8, and a refrigerant exchange pipe 9 </ b> A indicated by reference numeral 240 in FIG. 2. It is a general refrigerant | coolant type heat pump type air conditioning apparatus provided with the heat pump unit 9B connected. Among these, the heat pump unit 9B is installed outdoors so as to face the outdoor exhaust port 55, and the heat exchange unit 9A is installed in a space portion A1 in the air supply introduction path 8 as shown in FIG. That is, the heat exchange unit 9 </ b> A is installed in the space portion A <b> 1 located on the most upstream side of the air supply introduction path 8 near the external air supply port 81 among the plurality of space portions. For this reason, space part A1 functions as a heat exchange chamber. In the present embodiment, the space A8 is a space located on the most downstream side of the air flow introduced from the external air supply port 81. The floor 4 above the space A1 is thermally insulated.
In this embodiment, the heat exchange unit 9A is installed in the space A1, and the outside air inlet 54 is disposed in the space A8 located on the most downstream side of the flow of air introduced from the external air inlet 81. That is, the air supply introduction path 8 formed in the underfloor space in the present embodiment has space portions A1 to A8 that are divided into a plurality of parts so that the outside air introduced from the external air supply port 81 can flow. The air conditioner 9 that adjusts the temperature and humidity of the outside air introduced from the external air supply port 81 is disposed in at least one space A1.

  In this embodiment, an opening / closing means 90 that allows the two space portions to selectively communicate with each other is provided at the rising portion 1B that partitions the space portion A1 where the external air supply port 81 is located and the space portion A8 where the outside air introduction port 54 is located. Has been. In this embodiment, the opening / closing means 90 is constituted by a ventilation fan with a shutter. On the discharge side of the ventilation fan, an air passage 91 extending toward the heat exchange unit 9A is provided. For this reason, the air in the space A8 is supplied to the heat exchange unit 9A when the opening / closing means 90 is activated. In other words, in this embodiment, when the opening / closing means 90 is activated, the air introduced from the external air supply port 81 and adjusted in temperature and humidity by the air conditioner 9 in the space A1 is returned again from the space A8 to the space A1. A circulation path is formed, and the space portion A1 in which the air conditioner 9 is disposed communicates with the space portion A8.

  In this embodiment, an insect screen 84 is installed at least at the external air inlet 81 to prevent insects from entering the indoor 3 from the air inlet path 8 through the outside air inlet 54. Of course, the insect net 84 may be installed in any one of the holes 82 on the air supply introduction path 8 instead of the external air supply port 81. However, the insects adhere to the heat exchange unit 9A and the heat exchange efficiency is lowered. Considering this, it can be said that it is preferable to install the insect net 84 on the upstream side of the air supply from the heat exchange unit 9A.

  If it is set as the house of such a structure, since the underfloor space structurally formed between the floor 4 and the building foundation part 1 is used as the air supply introduction path 8 for taking in the outside air into the indoor 3, In addition, it is not necessary to provide an air supply port for directly taking in outside air (air) for each room in the building, and the outside air intake portion is concentrated in the air supply introduction port 54 connected to the air supply introduction path 8. Since the outside air supplied to the indoor 3 from this aggregated air supply inlet is operated by operating the air conditioner 9, the temperature and humidity are adjusted, so that the outside air is not directly introduced indoors from the outside, Heat loss is reduced, and the temperature and humidity of the indoor 3 can be adjusted efficiently. The location and number of outside air inlets are not limited to those in the present embodiment, and may be appropriately determined depending on the relationship between the exhaust amount per unit time (ventilation amount) and the ventilation path, the outdoor environment, and the like.

  In addition, since the outside air intake section into the indoor 3 is limited to the air supply inlet 54, the inside air in the indoor 3 is exhausted to the outdoors by the operation of the ventilation means 53, so that the planned indoor ventilation can be performed, and a sufficient air supply area In addition, it is possible to achieve efficient and comfortable indoor air-conditioning while securing a route and preventing problems such as weight and reverberation noise when opening and closing the entrance door due to negative pressure in the indoor 3 due to discharge of inside air In addition, the problem of a highly airtight building in which moisture easily accumulates can be solved because outside air is introduced into the air supply introduction path 8 under the floor. In addition, it is a highly airtight and highly insulated house, but outside air is introduced into the underfloor space and the temperature and humidity of the outside air are adjusted, so it is possible to take measures against moisture in the underfloor space, which is a challenge for highly airtight and highly insulated houses. In addition, in order to circulate outside air with low CO2 concentration in the underfloor space, compared with the conventional method in which indoor air with high CO2 concentration is circulated, deterioration of the structure, which is important for strength due to the neutralization of concrete, has occurred. It can prevent and improve the durability of the building.

  Since the 24-hour ventilator 5 is obliged to be installed in the building, it is not necessary to install it individually for indoor air conditioning, and central heating of highly airtight and highly insulated houses can be performed while reducing costs. .

  In this embodiment, outdoor outdoor air taken into the air supply introduction path 8 is adjusted by the air conditioner 9 and introduced into the indoor 3, so that an air supply port is provided for each room directly as in a conventional highly airtight house. Compared with the case where outside air is introduced indoors from the outside, the heat load is reduced, and depending on the temperature setting of the outside air introduced from the air supply introduction path 8 in the underfloor space, air conditioning equipment may not be installed in each room. In other words, the introduction cost can be reduced, the heating / cooling load can be reduced, and the energy required for indoor air conditioning can be suppressed.

The outside air whose temperature and humidity are adjusted by the air conditioner 9 passes through the air supply introduction path 8 formed in the underfloor space between the underfloor and the building foundation 1 and then passes through the air intake inlet 54 opened indoors. Therefore, heat is transferred to the building foundation 1 and the floor 4 in the course of outdoor air circulation, and the building foundation 1 and the floor 4 can be used as a heat storage unit. For this reason, the space under the floor (the supply air introduction path 8) can be used as a buffer zone, and changes in the temperature and humidity of the outside air can be absorbed and the outside air having a stable temperature and humidity can be supplied to the indoor 3. , More comfortable indoor air conditioning.
In particular, in this embodiment, since the floor 4 portion excluding the floor above the space A1 serving as a heat exchange chamber has no heat insulation structure, an air conditioner is provided in the supply air introduction path 8 formed between the floor 4 and the building foundation 1. When the outside air adjusted by 9 moves and heat moves to the building foundation 1 or the floor 4, floor heating or floor cooling for efficiently heating or cooling the floor 4 becomes possible. For this reason, there is an effect of directly raising or lowering the perceived temperature of a person who is indoors, which can contribute to energy saving, so that a more comfortable indoor environment can be realized with energy saving.

  In addition, the underfloor space is formed as an air supply introduction path 8 having space portions A1 to A8 divided into a plurality of spaces so that outside air introduced from the external air supply port 81 can circulate, and air conditioning is performed in at least one space portion 1A. Since the device 9 (heat exchange unit 9A) is arranged, in the air circulation process when it is circulated in the under-floor space, heat can be transferred to the building frame and floor to store heat. Can be obtained. Further, the dehumidifying action of the air conditioner 9 makes it possible to adjust the humidity under the floor over the entire floor during a rainy season with high humidity, and to effectively dehumidify the underfloor space where moisture tends to accumulate. Furthermore, the air in the underfloor space is actively moved, so that the portion where the humidity tends to accumulate locally can be eliminated, and the underfloor space can be maintained in a sanitary manner.

According to this embodiment, the opening / closing means 90 is opened / closed between the space portion A8 located on the most downstream side of the air flow introduced from the external air supply port 81 and the space portion 1A in which the air conditioner 9 (heat exchange unit 9A) is arranged. Thus, the air whose temperature and humidity are adjusted by the air conditioner 9 (heat exchanging unit 9A) is obtained by operating the opening / closing means 90 to bring the space portion A1 and the space portion A8 into communication. Even if the temperature changes during the distribution process, the air whose temperature has changed the most can be returned to the space 1A where the air conditioner 9 (heat exchange unit 9A) is installed. For this reason, retention of the air under a floor decreases, temperature can be made uniform and the temperature nonuniformity of floor heating floor cooling can be reduced. Moreover, since the air of space part A8 located in the most downstream side is supplied to the most upstream space part 1A in which the air conditioner 9 (heat exchange unit 9A) is installed among the plurality of space parts, the outside air load Since the rise time of the underfloor air conditioning can be shortened, the rise of the floor cooling / floor heating can be accelerated.
Furthermore, when an indoor window is opened and ventilated, such as in the middle period, there is a case where air is not supplied from the external air supply port 81 due to air supply from the window. The air is returned from the space portion A8 located on the most downstream side of the air flow to the space portion A1 where the air conditioner 9 (heat exchange unit 9A) is arranged, so that the air conditioner 9 (heat exchange unit) in the underfloor space 9A), floor heating / floor cooling can be performed even when the opening in the room is vacant.

  In this embodiment, the heat exchange unit 9A constituting the air conditioner 9 is disposed in the air supply introduction path 8, and the heat pump unit 9B connected to the heat exchange unit 9A is disposed so as to face the exhaust port 55. When the cooling operation is being performed, indoor heat exhausted from the outdoor discharge port 55 is applied to the heat pump unit 9B in a heated state by heat exchange, so that the heat pump unit 9B can be cooled. When the air conditioner 9 is in the heating operation, since the indoor warm air exhausted from the outdoor discharge port 55 is applied to the heat pump unit 9B that is cooled by heat exchange, the heat pump unit 9B can be warmed. For this reason, the exhaust heat recovery of the inside air discharged for ventilation by the ventilation means 53 can be performed by the heat pump unit 9B, the heat exchange efficiency of the air conditioner 9 can be improved, and energy saving can be further promoted. In other words, the heat exchange efficiency of the air conditioner is improved by exhausting the inside air from one outdoor outlet 55 in comparison with the conventional case where ventilation is performed by operating a ventilation device such as a toilet for 24 hours. That is, the heat recovery efficiency from the exhausted inside air is increased, and a comfortable indoor environment can be realized while further saving energy.

  In this embodiment, it is assumed that an air supply pipe embedded in the ground as in Patent Document 1 is arranged in the air supply introduction path 8 instead of the air conditioner 9 and the underground heat is used. In this case, since dew condensation occurs in the air supply pipe that exchanges heat with the underground heat, there is a concern about the propagation of germs and the generation of mold. In this case, when the outside air that should be fresh air is supplied to the room, it is assumed that it is contaminated by mold spores, bacteria, and the like, and therefore it is not a preferable mode. In addition, the underground heat exchange pipe needs a certain distance because of the necessity of heat exchange. For this reason, the fluid resistance in the pipe increases, so more powerful ventilation capacity is required, wasteful energy consumption and increased negative pressure environment, such as weight and reverberation noise when opening and closing the front door Since there is a concern about the burden on consumers such as defects, it is not a preferable form.

  In each space of the building foundation 1 that is in the air supply introduction path 8, a material capable of humidity conditioning and air cleaning such as bamboo charcoal or charcoal may be applied. By applying these materials, the outside air whose temperature is adjusted and cleaned by the air conditioner 9 can be introduced into the indoor 3, and the indoor environment can be made more comfortable. Utilizing the space under the floor (supply air introduction path 8) as a buffer zone, such as the so-called intermediate period (spring or autumn) where a comfortable temperature zone is obtained without operating the air conditioner 9, Since the outside air can be conditioned and cleaned with a material such as bamboo charcoal or charcoal applied in the space, the outside air cleaned and conditioned by the operation of the ventilation means 53 can be introduced into the indoor 3.

  The concrete and the floor 4 of the building foundation 1 are heated or cooled by the outside air whose temperature has been adjusted by the air conditioner 9 passing through the air supply introduction path 8. The heat storage property may be improved by using a member having a large heat capacity. A member having a large heat capacity may be installed in the underfloor space. In addition, when the air conditioner 9 is operated during the daytime after increasing the heat storage property in this way, solar power generation is used, leading to reduction of energy consumption and running cost. In addition, when the air conditioner 9 is operated at night, the running cost can be reduced by using low-cost late-night power.

The air conditioner 9 is not limited to a so-called refrigerant heat pump type air conditioner for home use or business use. Moreover, as a heat source at the time of heating, use of hot springs, solar heat, various kinds of waste heat or other natural energy may be used, and as a heat source at the time of cooling, well water or various kinds of waste heat may be used. These heat sources may be selected as appropriate according to the scale and regulations of the building, the requirements of the owner, and the like.
In addition, the 24-hour ventilation device 5 is used as the ventilation system, and the inside air is discharged and the outside air is introduced using the ventilation means 53, but the ventilation device is not limited to the form provided in the indoor 3; The form provided outdoors may be sufficient. In short, it is important to plan the ventilation route and to be able to ventilate for 24 hours that can be finally discharged to the outside. In climates where air conditioning is not necessary, the air conditioning means 9 is of course stopped, and fresh outside air is guided to the above route. As a result, there is no stagnation of the inside air of the indoor 3 contaminated, and the indoor 3 can be filled with fresh air.

  The external air supply port 81 may be equipped with a shutter that arbitrarily opens and closes the air supply port. This is intended to be able to adjust the introduction of high humidity outside air into the space under the floor, such as during the rainy season when it is extremely rainy, and to be installed in consideration of the maintenance of the air conditioner 9. Just close the shutter. However, if this shutter is closed, indoor ventilation is hindered. Therefore, the conventionally used external air supply port 102 shown in FIG. 3 may be additionally provided as a work port for maintenance.

  By adopting such a configuration, it is possible to expand options for the convenience of the occupants, improve the maintainability of the underfloor space, and realize a more comfortable indoor environment with energy saving.

  As a form of closing the shutter, for example, by closing the shutter and performing a dry operation of the air conditioner 9 during the rainy season, the underfloor space where moisture easily collects can be dried. When the air conditioner 9 breaks down in a cold region, this shutter is closed so that outside air does not enter the underfloor space, and the well-known outer wall air inlet 102 is used.

  In the above embodiment, when the air conditioner 9 is operated, the opening / closing means 90 is operated to connect the space A1 and the space A8. However, the operation timing of the opening / closing means 90 is independent of the operation of the air conditioner 9. You may make it operate | move. For example, in the season of a comfortable temperature and humidity without operating the air conditioner 9, the air conditioner 9 is stopped and only the opening / closing means 90 is activated, so that the space portion A1 is changed from the space portion A1 under the floor. Since air can be circulated with A8, the energy saving effect can be enhanced.

  As shown in FIG. 1, in the space downstream of the air supply introduction path from the space part A1 in which the heat exchange unit 9A is arranged, for example, a path state detection for detecting at least either temperature or humidity in the space part A8 A temperature sensor 300 as a means is arranged, and the display device 302 is arranged in the indoor 3 in connection with these sensors. Then, the temperature information and humidity information detected by each sensor are displayed on the display device 302, and the resident refers to the display device 302 to turn on / off the operation of the air conditioner 9 as appropriate. Based on the information detected by the sensor 300 and the humidity sensor 301, the operation of the air conditioner 9 may be automatically controlled, or the operation of the opening / closing means 90 may be controlled.

  The installation location of the temperature sensor 300 and the humidity sensor 301 is not limited as long as the space is under the floor. As in the present embodiment, the downstream side of the supply air introduction path from the space A1 where the heat exchange unit 9A is disposed. It is preferable to install in this space. In general, when the temperature exceeds 20 degrees Celsius and the humidity exceeds 80%, it tends to be an environment where mold grows, but in the season when the temperature difference between daytime and night is severe, even in the early morning when the temperature falls, In the air supply introduction path 8 that functions as a buffer zone at that time, the humidity is adjusted and stabilized by dry air in the daytime, and it is mixed even when high humidity outdoor air enters. And the humidity drops and stabilizes. If you can understand the situation under the floor, such as when the humidity rises during rainy weather, and turn on / off and control the air conditioner 9 as appropriate, you can realize a comfortable indoor environment that is more suitable for the environment and life. It becomes a possible energy-saving building.

  Highly airtight and highly insulated energy-saving buildings are structured so as not to be affected by outside air, but 24-hour ventilation is required by the provisions of the Building Standards Law, and in many buildings, fresh air (outside air) is directly applied. Since air is supplied to the room, hot air enters directly in the summer and causes room temperature to rise. In winter, cold air enters the room directly, so the user closes the air supply port and stops the ventilator. There were many things. As a result, in highly airtight and highly insulated buildings with extremely low outdoor air circulation, health problems due to an increase in carbon dioxide concentration, health problems due to sick house syndrome due to an increase in volatile organic matter (VOC) concentration, and an increase in the amount of moisture in the air Many cases of health disorders such as allergic disorders due to the occurrence of mold, mites that eat mold, etc. have been reported. In addition, an increase in humidity and carbon dioxide concentration in indoor air is a factor that promotes condensation in the walls, corrosion and neutralization of concrete, and promotes deterioration of the structure, which significantly increases the durability of the building. Reduce.

  However, by adopting the structure of the building according to this embodiment, the life cycle can be extended by saving energy of the building and improving the durability of the building in order to achieve a significant reduction in CO2 due to global warming. In the modern times when energy consumption and resource saving are required in the manufacturing process of buildings, the durability of buildings and the heat loss can be greatly reduced. Highly airtight and highly insulated buildings will bear great expectations, and there is a need for a healthier indoor environment, and the configuration according to the present invention to establish each of them is the next generation of buildings. It is an energy-saving ventilation system that is effective to save energy, improve the durability of the building, and create a healthy indoor environment, and thus contribute to global warming, and an energy-saving building equipped with it.

  In the above-described embodiment, a wooden detached house is described as an example of a building to which the energy saving ventilation system 100 is applied. However, as a building to which the energy saving ventilation system 100 is applied, the architecture of these embodiments is described. The present invention is not limited to a thing, but may be applied to a building of another form, for example, a condominium such as a condominium. Even in that case, the same effect as the present invention can be obtained. Moreover, although the first floor of a wooden detached house has been described as an example of an indoor underfloor space, the underfloor space may be, for example, a space under the floor of two or more floors.

  It is the schematic of the house as a building provided with the energy saving ventilation system which is one Embodiment of this invention.   It is a top view which shows the structure of the building base part of a house shown in FIG. 1, and an air supply introduction path | route.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Indoor 4 Floor 5 Ventilation device 8 Supply air introduction path 9 Air conditioner 9A Heat exchange unit 9B Heat pump unit 20 Opening part 51 Exhaust port 53 Ventilation device 54 Supply air introduction port 55 Exhaust port 81 External supply port 100 Energy saving ventilation system A1- A8 space part A1 space located on the most upstream side A8 space part located on the most downstream side

Claims (7)

At least a ventilation means for discharging indoor air that has been air-tightened to the outside and an air supply introduction section for introducing outside air from the outdoors to the indoor, and operating the ventilation means to change the indoor air a predetermined number of times In an energy-saving ventilation system with a ventilation device configured as follows:
The air supply introduction unit is formed in an indoor underfloor space, and is configured by an air supply intake path that is connected to an outdoor air intake opening that opens toward the outdoors and an air supply intake opening that is open indoors. ,
The air supply introduction path has a space part that is divided into a plurality of parts so that the outside air introduced from the outside air intake can circulate, and at least one space part of the outside air introduced from the outside air intake port An air conditioner that adjusts the temperature and humidity is disposed, and a space portion that is positioned on the most downstream side of the flow of air introduced from the outside air intake port communicates with a space portion in which the air conditioner is disposed. An energy-saving ventilation system.   The energy-saving ventilation system according to claim 1, wherein the air conditioner is disposed in a space located on the most upstream side of the supply air introduction path close to the outside air intake port. The air conditioner includes a heat exchange unit that cools or heats the outside air introduced into the supply air introduction path, and a heat pump unit that is connected to the heat exchange unit,
The heat exchange unit is disposed in the supply air introduction path, and the heat pump unit is disposed so as to face an exhaust port opened to the outside of the ventilation means. The energy saving ventilation system according to 1 or 2. A path state detection unit that is disposed in a space downstream of the air supply introduction path from a space in which the heat exchange unit is disposed, and detects at least one of temperature and humidity in the space;
4. The energy saving ventilation system according to claim 3, further comprising: a display unit that is disposed indoors and that is connected to the path state detection unit that displays information detected by the path state detection unit.   An energy-saving building comprising the energy-saving ventilation system according to any one of claims 1 to 4.   6. The energy-saving building according to claim 5, wherein the energy-saving building uses a highly heat-insulating structure at least on an outer wall, a boundary floor, and an opening excluding a floor portion forming an indoor.   6. The energy-saving building according to claim 5, wherein the energy-saving building has a highly heat-insulating structure at least on an outer wall, a roof, a foundation, and an opening excluding a floor portion forming an indoor.

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