JP6482968B2 - Underfloor air conditioning system and energy-saving house equipped with the same - Google Patents

Description

  The present invention relates to an underfloor air-conditioning system and an energy-saving house equipped with the same, and more particularly, an underfloor air-conditioning system that uses exhaust heat of a photovoltaic power generation device under the floor and uses it for heating, and an energy consumption provided with the system. It relates to energy-saving houses that can be reduced.

  In recent years, with the growing awareness of ecology and the demand for global warming countermeasures, solar power generation equipment has been installed to reduce the amount of commercial power used, and heat pump water heaters have been installed to reduce the amount of energy used for air conditioning. So-called energy-saving houses are popular. For example, the present inventors / applicants previously introduced cold air generated by a heat pump hot water supply device at night in Japanese Unexamined Patent Application Publication No. 2013-117353 into a subfloor space whose bottom surface and side surfaces are surrounded by foundation concrete. We have proposed an underfloor air-conditioning system that stores heat (cools) and uses it for cooling while introducing outside air into the underfloor space during the day.

  On the other hand, as for heating, Japanese Patent Application Laid-Open No. 2014-190638 proposes a solar power generation apparatus having a power conditioner and a heating system provided with a heat pump, and heat pumps are considered while taking into account power sales by the solar power generation apparatus. As a means of precisely controlling the energy used for heating by heating, further cost reduction in heating operation has been realized.

  Japanese Patent Application Laid-Open No. 2014-17068 discloses a technique for using the exhaust heat of a power storage device (battery) attached to a solar power generation device or the like to introduce air warmed by the exhaust heat into the floor portion to store heat. A method of floor heating by storing heat in a material has been proposed, and the energy required for heating can be further reduced by utilizing the heat generated during charging and discharging, which has been merely discharged.

  By the way, in a solar power generation device, a power conditioner for converting the unstable direct current electricity generated by the solar panel into a constant voltage alternating current electricity usable at home is indispensable. However, it is known that heat is generated when this power conditioner is operated, and the air heated by the heat is not discharged and used as it is, and it is still insufficient from the viewpoint of energy efficiency. I must say.

JP2013-117353A JP 2014-17068 A

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to realize an underfloor air-conditioning system excellent in energy efficiency at a low cost for a house equipped with a solar power generation device. .

  Therefore, the present invention is applied to a house that performs solar power generation with a solar power generation device having a solar panel and a power conditioner, and at least floor heating is performed by air-conditioning the underfloor space with a predetermined air-conditioning means. In an underfloor air conditioning system that can be implemented, the power conditioner is stored in a power conditioner storage room having a storage space of a predetermined size or larger, and a warm air passage is provided to communicate from the upper space of the power conditioner storage room to the underfloor space. In addition, a cold air passage that communicates from the lower side of the underfloor space to the lower space of the power conditioner storage room is provided, and the air in the power conditioner storage room heated by the exhaust heat generated by the operation of the power conditioner is It is introduced into the underfloor space through the warm air passage The floor plate is warmed by raising the temperature of at least the upper side thereof, and the lower side air, which is cooler than the upper side air, is introduced into the power conditioner storage chamber through the cold passage. The conditioner is supposed to be cooled, and the floor heating is performed by using the exhaust heat of the power conditioner as a heat source while circulating air between the power conditioner storage room and the space under the floor.

  In this way, the exhaust heat of the power conditioner, which was conventionally only exhausted to prevent excessive temperature rise, is used for floor heating in the air circulation passage formed between the power conditioner storage room and the underfloor space. By adopting a usable configuration, the energy efficiency of the entire house can be remarkably increased without an excessive increase in installation cost.

  In addition, in this underfloor air conditioning system, an electric fan is attached to the warm air passage, and at least during floor heating, the air in the upper space of the power conditioner storage room is forced to the underfloor space by the operation of the fan. If it is characterized by being sent out, the air is actively circulated between the two spaces, so that efficient and effective air conditioning can be easily realized.

  In this case, the operation of the fan is controlled by electronic control means, and the electronic control means uses temperature data detected via temperature sensors respectively disposed in the underfloor space and the power conditioner storage chamber. Based on the above, the control is performed in a direction that realizes optimal underfloor air conditioning and proper cooling of the power conditioner, and by overheating the power conditioner while realizing efficient air conditioning of the underfloor space. It is easy to avoid trouble.

  Further, in the above-described underfloor air conditioning system, the power conditioner storage chamber stores power storage means attached to the photovoltaic power generator together with the power conditioner, and the exhaust heat accompanying the power storage and discharge is also reduced by floor heating. If it is characterized by being used as a heat source, it will become even more energy efficient by effectively using the thermal energy that has just been thrown away, and a larger heat source by operating both at the same time. In addition to being obtained, it is possible to heat a longer time of the day by using the timing difference between the two operations.

  Furthermore, in the underfloor air conditioning system described above, the power conditioner storage room communicates with the upper air passage that connects the upper space or the upper portion of the underfloor space and the outdoors, and the lower space or the lower portion of the underfloor space and the outdoors. A lower air passage is provided to cool the power conditioner or to ventilate the underfloor space, and the two passages communicate with each other to allow air to flow between the power conditioner storage room or the underfloor space and the outdoors. If it is characterized by being circulated, it is possible to effectively avoid situations in which the power conditioner storage chamber becomes excessively hot or the humidity in the underfloor space becomes excessively high.

  And it is the house which is equipped with the solar power generation device which has a solar panel and a power conditioner, and performs solar power generation, is equipped with the power conditioner storage room which stored the power conditioner, and the power conditioner storage room A warm air passage communicating from the upper space to the under floor space, and a cold air passage communicating from the lower side of the under floor space to the lower space of the power conditioner storage room. If it is an energy saving house, it will be possible to achieve extremely high energy efficiency at low running costs.

  According to the present invention in which the exhaust heat of the power conditioner can be used for floor heating in an air circulation passage formed between the power conditioner storage room and the underfloor space, an energy efficient underfloor air conditioning system can be realized at low cost. Is.

It is a longitudinal cross-sectional view which shows the structure of the energy-saving house provided with the underfloor air conditioning system of this invention. It is a longitudinal cross-sectional view which shows the state which is performing floor heating with the underfloor air conditioning system of FIG. It is a longitudinal cross-sectional view which shows the state which is cooling the power conditioner and a storage battery with the underfloor air conditioning system of FIG. It is a longitudinal cross-sectional view which shows the state which is ventilating the underfloor space with the underfloor air conditioning system of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a configuration of an energy saving house provided with an underfloor air conditioning system according to the present embodiment. This energy-saving house is for connecting a solar power generation device comprising a solar panel (not shown) installed on a roof, a power conditioner 4 connected to the solar panel and a storage battery 5 as a power storage means, and a distribution board (not shown). In addition to the above wiring, an underfloor air conditioning system for performing floor heating and the like to be described later is provided.

  The underfloor air conditioning system includes a power conditioner 4, a power conditioner storage chamber 35 having a storage space of a predetermined size or larger for storing the power conditioner 4, and an upper space from the power conditioner storage chamber 35 to the underfloor space 25. It has a warm air passage 8a by a tubular body to be communicated and a cold air passage 8b by a tubular body which communicates from the lower side of the underfloor space 25 to the lower space of the power conditioner storage chamber 35.

  By adopting such a configuration, air (warm air) in the power conditioner storage chamber 35 heated by heat generated by the operation of the power conditioner 4 is introduced into the underfloor space 25 via the warm air passage 8a, so that at least the It becomes possible to carry out floor heating while raising the temperature on the upper side and warming the floor plate 26, and air that is colder and heavier than the air on the upper side (cold air) passes through the cold air passage 8 b opened on the lower side of the underfloor space 25. It is assumed that the power conditioner 4 can be cooled by being introduced into the lower space of the power conditioner storage chamber 35, which is the greatest feature of the present invention.

  In addition, an upper air passage 7a is provided on the upper side of the power conditioner storage chamber 35. The upper air passage 7a is formed by a tubular body for communicating the upper space or the upper side of the underfloor space 25 with the outside. Is provided with a lower air passage 7b made of a tubular body for communicating the lower space or the lower side of the underfloor space 25 with the outside. As a result, when the power conditioner 4 is cooled or the underfloor space 25 is ventilated, the upper air passage 7a and the lower air passage 7b communicate with each other so that the air flows between the power conditioner storage chamber 35 or the underfloor space 25 and the outdoors. Is supposed to circulate.

  The underfloor space 25 is composed of a solid basic concrete 20 in which at least a portion for heating the floor is surrounded by concrete at the bottom and side surfaces, and the concrete itself also functions as a heat storage means. It has become. On the other hand, the power conditioner storage chamber 35 is formed adjacent to the underfloor space 25, and its lower space is surrounded by concrete in the same manner as the underfloor space 25 described above, and its upper space is the space below the staircase storage chamber 30. It is surrounded by a box 27 that protrudes from the floor surface, and is in a state in which the flow of air is closed between the side of the storage room 30 under the stairs.

  In this embodiment, in addition to the power conditioner 4 that generates heat during operation, a storage battery 5 that generates heat during charging and discharging is stored in the power conditioner storage chamber 35, and the exhaust heat associated with the charging and discharging is also a heat source for floor heating. It is also used as a feature. In addition, the power conditioner 4 and the storage battery 5 that are heat sources are powered by a support base 41 in a state in which the upper surface is formed in a lattice shape while the side surfaces are open and air can be circulated in the vertical direction in order to ensure the heat radiation capability. It is supported substantially at the center position of the conditioner storage chamber 35 so that air can easily flow along the bottom surface, side surface, and top surface thereof.

  The upper air passage 7a and the warm air passage 8a are connected via a switching valve 61 at a position above the power conditioner 4 and the storage battery 5 in the power conditioner storage chamber 35. The switching valve 61 is connected to the power conditioner storage chamber 35. In the state where the upper air passage 7a is closed while communicating with the underfloor space 25, in the state where the warm air passage 8a is closed while communicating with the power conditioner storage chamber 35 and the outside, the power conditioner storage chamber 35 while communicating with the underfloor space 25 and the outside. An electric actuator 6 can be used to switch between the three states, ie, the state where the opening to the door is closed, and an electric fan 6a is attached to the switching valve 16 so that air in the power conditioner storage chamber 35 can be supplied. It is forcibly sent to the underfloor space 25 or outdoors.

  The fan 6a and the switching valve 61 are provided with electronic control means and operation / setting means, and are wired to a control panel 10A disposed outside the power conditioner storage chamber 35 (in the present embodiment, the staircase storage chamber 30) ( The operation is controlled by each of them. An electric fan 6b is also provided at the open end of the cool air passage 8b on the power conditioner storage chamber 35 side, and this operation is also controlled on the control panel 10A side.

  That is, the control panel 10A receives the data signals of the temperature sensor 11a disposed in the power conditioner storage chamber 35a, the temperature sensor 11b disposed in the underfloor space 25, and the humidity sensor 11c, respectively. On the basis of the temperature data and humidity data, the automatic control means controls the switching valve 61 and the fans 6a and 6b in a direction to realize the optimum air conditioning of the underfloor space 25 and the appropriate temperature management of the power conditioner 4 and the storage battery 5. Feedback control is provided.

  FIG. 2 shows a state where floor heating is performed in winter in the underfloor air conditioning system according to the present embodiment. Even during the winter, the solar panels are actively generating electricity during the day, so the power conditioner 4 and the storage battery 5 built in the power conditioner storage room 35 generate a large amount of heat while operating. The surrounding air is warmed and raised and collected in the upper space of the power conditioner storage chamber 35.

  The electronic control means of the control panel 10A detects that the underfloor space 25 is below a predetermined temperature and detects that the temperature of the upper space of the power conditioner storage chamber 35 has reached a predetermined temperature. In addition, it is set to start floor heating. In the control in the floor heating, the switching valve 61 is set to a position where the power conditioner storage chamber 35 and the underfloor space 25 are communicated with each other, and the fan 6a is operated.

  Thereby, the warm air in the power conditioner storage chamber 35 is used to warm the floor plate 26 while being introduced to the upper side of the underfloor space 25 through the warm air passage 8a. Then, the air that has been used for heating and whose temperature has been lowered descends to the lower side and further lowers the temperature by warming the lower-temperature foundation concrete 20, and then passes through the cold air passage 8b that opens near the bottom surface. To return to the lower space of the power conditioner storage chamber 35. In the present embodiment, a fan 6b that is controlled to operate from the control panel 10A side is also attached to the cold air passage 8b, and air is sent while the cold air passage 8b communicates during the operation. It is assumed that the air circulation between them is easy to be performed smoothly.

  And when several hours pass from the start of floor heating, since the temperature of the underfloor space 25 whole rises, the temperature of the inner part of the foundation concrete 20 which is also a heat storage body will also rise to some extent. Therefore, the temperature of the underfloor space 25 is maintained higher than the outside due to the heat of the foundation concrete 20 even at the night stage when the solar panel stops generating power, the power conditioner 24 stops operating and the floor heating is finished. Therefore, it becomes easy to avoid the floor board 26 from getting cold at night.

  On the other hand, when using the electricity stored in the storage battery 5 after the end of the photovoltaic power generation, in addition to the storage battery 5 generating heat due to the discharge, the power conditioner 4 that converts the DC current to AC also generates heat. become. Also in this case, under the condition that the temperature sensor 11a detects that the temperature is equal to or higher than the predetermined temperature, the floor heating can be performed even after the end of power generation by sunlight. Alternatively, even in the case where inexpensive commercial power is stored in the storage battery 5 at night, heat is generated due to charging, so that it is possible to perform floor heating using this as a heat source.

  FIG. 3 shows a state where the power conditioner 4 and the storage battery 5 are cooled without performing floor heating. In this case, the electronic control means of the control panel 100A detects that the upper space of the power conditioner storage chamber 35 has risen to a predetermined temperature or more by the temperature sensor 11a when the temperature is high and the amount of power generation is large, such as in summer. As a result, the switching valve 61 is switched to a position where the power conditioner storage chamber 35 communicates with the outdoors, and control for operating the fan 6a is executed.

  At this time, since the opening of the cool air passage 8b on the side of the power conditioner storage chamber 35 is closed at the position of the fan 6b, the operation of the fan 6a causes the warm air in the upper space of the power conditioner storage chamber 35 in the upper space to be outdoor. As a result, the interior of the power conditioner storage chamber 35 is in a negative pressure state as compared with the outdoors.

  Therefore, the pressure open / close valve 71 that has closed the open end of the lower air passage 7b is opened to introduce outdoor air into the lower space of the power conditioner storage chamber 35. The power conditioner 4 and the storage battery 5 are appropriately cooled while realizing a smooth air circulation between outdoors.

  FIG. 4 shows a state in which ventilation is performed by the underfloor air conditioning system in a situation where moisture tends to accumulate in the underfloor space 25 such as during the rainy season. In this case, the electronic control means of the control panel 10A that has detected that the underfloor space 25 has become equal to or higher than the predetermined humidity by the humidity sensor 11c allows the power conditioner storage chamber 35 to communicate with the switching valve 61 between the underfloor space 25 and the outdoors. In addition to switching to the position of closing the opening on the side, control is performed to rotate the lower fan 6b in the opposite direction to that in FIG. 2 while communicating the lower passage 8b.

  As a result, since the pressure inside the power conditioner storage chamber 35 becomes negative compared to the outdoors, the open / close valve 71 of the lower air passage 7b is opened to allow outdoor dry air to be introduced into the power conditioner storage chamber 35. Become. The introduced air is sent into the underfloor space 25 by the fan 6b and exhibits the effect of drying the inside thereof, and is then discharged to the outside through the warm air passage 8b and the upper air passage 7a.

  As described above, the air is circulated between the underfloor space 25 and the outside by the operation of the fan 6b, so that the air in the underfloor space 25 is appropriately ventilated while being sequentially replaced, and the underfloor space 25 The humidity is properly maintained. In addition, since a part of the outside air introduced through the lower air passage 7b is mixed with the air in the power conditioner storage chamber 35, the cooling action of the power conditioner 4 and the storage battery 5 can be expected to some extent. When the temperature of the upper space becomes equal to or higher than a predetermined temperature, it is preferable to control to switch to the state shown in FIG.

  Thus, the underfloor air conditioning system according to the present embodiment and the energy-saving house equipped with the air / water storage system include a plurality of sensors that detect the air communication between the power conditioner storage chamber 35, the underfloor space 25, and the outside. By adopting a method that executes control to switch appropriately based on data, appropriate underfloor air conditioning including underfloor heating and appropriate cooling of the power conditioner 4 and the storage battery 5 can be performed without requiring excessive installation costs and operation costs. Can be realized.

  The underfloor space for underfloor heating may be limited to a part of the underfloor space of the entire house, for example, only in the living room location, depending on the capacity of the heat source to be used. What is necessary is just to provide a surrounding wall with the board | plate material etc. which were excellent in the foundation concrete or heat insulation so that the target position may be enclosed, in order to partition with the other space which is not performed. In that case, you may provide the thermal storage function by covering the inner peripheral surface side, such as the board | plate material which comprises a surrounding wall, with thermal storage means, such as a cold insulating sheet.

  As described above, an underfloor air conditioning system excellent in energy efficiency can be realized at low cost according to the present invention for a house equipped with a photovoltaic power generation device.

  4 Power conditioner, 5 Storage battery, 6a, 6b Fan, 7a Upper air passage, 7b Lower air passage, 8a Warm air passage, 8b Cold air passage, 10A Control panel, 11a, 11b Temperature sensor, 11c Humidity sensor, 20 Foundation concrete, 25 Under floor Space, 26 Floor board, 27 Box, 30 Staircase storage room, 35 Power conditioner storage room, 61 Switching valve, 71 Open / close valve

Claims (6)

An underfloor air conditioning system capable of performing at least floor heating by performing air conditioning of the underfloor space with a predetermined air conditioning means, as applied to a house that performs solar power generation with a solar power generation device having a solar panel and a power conditioner In
The power conditioner is stored in a power conditioner storage room having a storage space of a predetermined size or more, and a warm air passage is provided to communicate from an upper space of the power conditioner storage room to the underfloor space, and the underfloor cool air passage communicating from the lower side to the lower space of the power conditioner housing chamber is provided in the space, the air of the power conditioner containing chamber warmed by waste heat associated with the operation of the power conditioner, the hot aisle Is introduced into the under-floor space to raise the temperature of at least the upper side to warm the floor board, and the lower-side air having a temperature lower than that of the upper-side air passes through the cold air passage to the power. The power conditioner is introduced into the conditioner storage room. Underfloor air conditioning, wherein the floor heating is performed by using the exhaust heat of the power conditioner as a heat source while circulating air between the power conditioner storage chamber and the underfloor space. system.   An electric fan is attached to the warm air passage, and the air in the upper space of the power conditioner storage chamber is forcibly sent to the under floor space by the operation of the fan at least during the floor heating. The underfloor air conditioning system according to claim 1, wherein   The operation of the fan is controlled by electronic control means. The electronic control means uses temperature data detected via temperature sensors respectively disposed in the underfloor space and the power conditioner storage chamber. The underfloor air conditioning system according to claim 2, wherein the control is performed in a direction that realizes optimal underfloor air conditioning and appropriate cooling of the power conditioner.   In the power conditioner storage chamber, power storage means attached to the solar power generation device is stored together with the power conditioner, and waste heat generated by the power storage and discharge is also used as a heat source for the floor heating. The underfloor air conditioning system according to claim 1, 2, or 3.   The power conditioner storage chamber is provided with an upper air passage that communicates the upper space or the upper side of the underfloor space and the outdoors, and a lower air passage that communicates the lower space or the lower side of the underfloor spaces and the outdoors. And when cooling the power conditioner or ventilating the underfloor space, the both passages communicate with each other to circulate air between the power conditioner storage room or the underfloor space and the outdoors. The underfloor air conditioning system according to claim 1, 2, 3, or 4.   The solar power generation apparatus having the solar power generation apparatus having the solar panel and the power conditioner and performing the solar power generation, the power conditioner storage chamber storing the power conditioner, the power conditioner 4. The warm air passage that communicates from the upper space of the storage chamber to the underfloor space, and the cool air passage that communicates from the lower side of the underfloor space to the lower space of the power conditioner storage chamber are provided. , 4 or 5 is provided with an underfloor air conditioning system.

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