JP2008275265A - Heating and cooling system and unit building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating and cooling system effectively utilizing heat in simple constitution and a unit building including it. <P>SOLUTION: This heating and cooling system S includes: a heat storage part 2 for storing a circulating fluid 23, heat of which is stored through a heat medium 54 of a heat pump 5; an interior radiator 4 installed in a room 15 and supplied with the circulating fluid 23 from the heat storage part 2; and a radiator 3 in an underfloor space 14 installed in an underfloor space 15 of a building to pass the circulating fluid 23 discharged from the interior radiator 4. The circulating fluid 23 is circulated through the heat storage part 2, the interior radiator 4 and the radiator 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heating / cooling system using a heat pump and a unit building including the same.

  2. Description of the Related Art Conventionally, an air conditioning system that heats and cools a building using a heat pump is known (see Patent Document 1).

  Patent Document 1 discloses a system in which hot water heated by a heat pump using midnight power is stored in a hot water storage tank, and floor heating is performed using the hot water as a medium.

  On the other hand, when water is heated by a heat pump, it is known that the coefficient of performance (COP) of the heat pump increases and the energy efficiency improves as the temperature of the supplied water decreases.

Therefore, in Patent Document 1, energy efficiency is improved by providing a plurality of hot water outlets in a hot water storage tank and performing complex hot water supply control.
JP 2003-294251 A

  However, in the configuration of Patent Document 1, piping is complicated, and the entire configuration of the hot water storage tank is enlarged, so that the place where it can be installed is limited. In addition, since a device that performs complex control is required, the cost tends to increase.

  Accordingly, an object of the present invention is to provide a heating / cooling system capable of effectively using heat with a simple configuration, and a unit building including the heating / cooling system.

  In order to achieve the above object, a heating / cooling system according to the present invention includes a heat storage unit that stores a circulating fluid that is stored via a heat medium of a heat pump, and a heat storage unit that is installed in a building, and is connected to the circulating fluid from the heat storage unit. And an underfloor heat exchanger that is installed in an underfloor space of a building and passes through the circulating fluid discharged from the indoor heat exchanger, and the circulating fluid is the heat storage section. And the indoor heat exchanger and the underfloor heat exchanger are circulated.

  Here, while the said thermal storage part is installed in the said underfloor space, the outer periphery can be set as the structure coat | covered with the heat insulation part.

  In addition, the underfloor space is an underfloor space on the lowest floor of a building surrounded by a floor, bottom concrete, and side wall concrete, and a heat insulating material is preferably attached to the side wall concrete.

  Furthermore, the unit building of the present invention includes any one of the above heating and cooling systems.

  The heating / cooling system of the present invention configured as described above includes a heat storage unit that stores heat by a heat pump, an indoor heat exchanger that supplies a circulating fluid from the heat storage unit and performs indoor air conditioning, and an underfloor heat exchanger. Circulating fluid is circulating.

  For this reason, even if the circulating fluid is not able to sufficiently exchange heat with the indoor air in the indoor heat exchanger, heat is exchanged in the underfloor space, so the indoor space can be heated or cooled through the underfloor space. Can do.

  Further, if the circulating fluid is returned to the heat storage section after sufficiently radiating or absorbing heat with the underfloor heat exchanger, heat can be efficiently stored by the heat pump.

  Furthermore, by installing the heat storage part in the underfloor space and providing a heat insulating part on the outer periphery thereof, the heat storage part can be installed close to the indoor heat exchanger, and even if heat moves through the heat insulating part, It is used for warming and cooling, so it is energy efficient.

  Moreover, by making the underfloor space into a heat insulating structure, the air heated or cooled by the underfloor heat exchanger can be efficiently transmitted to the floor.

  Furthermore, the unit building provided with such a heating / cooling system can efficiently heat / cool the entire building.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory diagram illustrating the overall configuration of a unit building U including the heating / cooling system S of the present embodiment.

  First, in terms of configuration, such a unit building U includes a bottom concrete 11 constructed as basic heat insulation, a side wall concrete 12 erected on the side edge thereof, and a wall portion 17 erected thereon. And a ceiling portion 16 that closes the upper end opening of the wall portion 17.

  In the space surrounded by the ceiling portion 16 and the wall portion 17, the underfloor space 14 and the indoor room 15 are partitioned by the floor 10. The floor 10 has a configuration in which a heat insulating material is not attached so that heat or cold air from the underfloor space 14 is easily transmitted. The room 15 corresponds to a living room such as a living room, a bedroom, and a dining room.

  In addition, a heat insulating material 13 such as glass wool is attached to the side wall concrete 12 on the underfloor space 14 side, so that heat and cold in the underfloor space 14 are difficult to move to the outdoors 18.

  And the heating / cooling system S of this Embodiment is the heat pump 5 installed in the outdoors 18, the heat storage part 2 installed in the underfloor space 14, the heat radiator 3 as an underfloor heat exchanger, and the floor 10 of the indoor 15. It is mainly comprised from the indoor heat radiator 4 as an indoor heat exchanger installed on the top, and the circulation line 6 which connects the thermal storage part 2, the indoor heat radiator 4, and the heat radiator 3. FIG.

  The heat pump 5 is a device that heats or cools by moving heat between a low temperature object and a high temperature object, and absorbs heat by compressing and expanding while circulating a heat medium 54 such as carbon dioxide. Or heat is released to heat or cool the object in contact with the heat medium 54.

  In the heat pump 5, as schematically shown in FIG. 1, a path for circulating the heat medium 54 in and out is formed by the forward path pipe 51, the heat exchanging section 52, and the return path pipe 53.

  For example, the heat medium 54 heated by the heat pump 5 flows out from the forward pipe 51, performs heat exchange in the heat exchanging unit 52 disposed inside the heat accumulating unit 2, and the heat medium 54 whose temperature has decreased due to heat dissipation is returned. It returns to the heat pump 5 through the pipe 53. In the heat pump 5, the heat medium 54 exchanges heat with the atmosphere, and the heated heat medium 54 flows out from the forward pipe 51.

  On the other hand, the heat storage unit 2 in which the heat exchange unit 52 is disposed mainly includes a heat storage tank 21 having an outer shell formed of a synthetic resin material such as plastic, and a heat insulating unit 22 such as glass wool covering the outer periphery thereof. Composed.

  The heat storage tank 21 is filled with a circulating fluid 23 such as water, and is heated or cooled by heat exchange with the heat exchange unit 52 of the heat pump 5.

  In addition, the circulating fluid 23 inside the heat storage unit 2 is supplied to the indoor radiator 4 through the circulation line 6. This circulation pipe 6 is a heat exchange that performs heat exchange inside the indoor radiator 4 and a supply pipe 61 that connects the heat storage unit 2 and the indoor radiator 4, a circulation pump 63 provided in the middle of the supply pipe 61, and It is mainly comprised from the part 65, the exhaust pipe 62 which connects the heat radiator 3 of the indoor heat radiator 4 and the underfloor space 14, and the return pipe 64 which connects the heat radiator 3 and the thermal storage part 2. FIG.

  This indoor radiator 4 is a device that performs heat exchange between the heat of the circulating fluid 23 stored in the heat storage unit 2 and the air in the room 15, and is equipped with a blower fan or the like to heat the entire room 15, Adjust the room temperature by cooling.

  In addition, the heat radiator 3 exchanges heat with the air in the room 15 by the indoor heat radiator 4 so that the temperature of the circulating fluid 23 whose temperature is decreased or increased is further lowered or increased in the underfloor space 14. It is a device to be installed. That is, in the radiator 3, heat exchange is performed between the circulating fluid 23 that has flowed from the discharge pipe 62 and the air in the underfloor space 14.

  On the other hand, the supply pipe 61 and the return pipe 64 of the circulation pipe 6 connected to the heat storage unit 2 connect the supply pipe 61 for taking out the high-temperature circulating fluid 23 to the upper part of the heat storage tank 21, and the low-temperature circulating fluid 23. Is connected to the lower part of the heat storage tank 21 so that the circulating fluid 23 is not mixed in the heat storage tank 21 and the temperature is not lowered.

  Next, the heating / cooling system S of the present embodiment will be described with reference to FIG. 2 while focusing on the flow of the heat medium 54 and the circulating fluid 23. In addition, although the case where heating is performed is described here, the same flow is performed in the case of cooling.

  First, the heat medium 54 heated by the heat pump 5 flows out from the forward pipe 51 and is sent to the heat exchange unit 52. The heat exchanging unit 52 meanders inside the heat storage tank 21 of the heat storage unit 2 and is in long contact with the circulating fluid 23 filled therein via a tube material.

  Then, when the heat medium 54 and the circulating fluid 23 come into indirect contact with each other in the heat exchanging section 52, heat exchange is performed, and the heat of the heat medium 54 is transmitted to the circulating fluid 23 and heated, and heat is taken away. The broken heat medium 54 is discharged to the return pipe 53 as the temperature drops.

  The heat medium 54 returned to the heat pump 5 through the return pipe 53 in this way is expanded to a temperature lower than the atmosphere, and the temperature rises again by exchanging heat with the atmosphere, and is compressed and further heated. The heat medium 54 is sent again toward the heat storage unit 2.

  When the circulation between the heat pump 5 and the heat storage unit 2 of the heat medium 54 is repeated, the heat storage unit 2 is covered with the heat insulating unit 22 and hardly dissipates heat, so that heat is stored in the circulating fluid 23. become. In addition, it is economical to store such heat using midnight power with a low electricity bill.

  On the other hand, when the indoor radiator 4 is switched on to raise the temperature of the room 15, the circulation pump 63 is activated and the circulating fluid 23 in the heat storage unit 2 is sucked in via the supply pipe 61, and the indoor radiator 4. Will be sent to.

  Inside the indoor radiator 4, the heat exchanging unit 65 meanders, and heat exchange is performed by contacting the air in the room 15. Further, when a blower fan is provided, heat dissipation is promoted by the air volume, and warm air is released into the room 15.

  Then, the circulating fluid 23 that has exchanged heat with the air in the room 15 decreases in temperature by the amount of heat released and flows out to the discharge pipe 62. The circulating fluid 23 that has flowed out of the discharge pipe 62 has a temperature that is lower than when it is supplied, but is maintained at a sufficiently high temperature compared to the outside air temperature in winter.

  Therefore, the circulating fluid 23 guided to the underfloor space 14 through the discharge pipe 62 is again subjected to heat exchange with the air in the underfloor space 14 by the radiator 3. The radiator 23 is formed so as to meander and elongate the contact distance with the air in the underfloor space 14, for example.

  Then, the circulating fluid 23 radiated for the second time by the heat exchange in the radiator 3 is returned to the heat storage unit 2 through the return pipe 64. The circulating fluid 23 that has returned to the heat storage unit 2 is sufficiently lowered in temperature due to the heat radiation twice by the indoor radiator 4 and the radiator 3.

  Next, the effect | action of the heating / cooling system S of this Embodiment is demonstrated.

  The heating / cooling system S of the present embodiment configured as described above includes a heat storage unit 2 that stores heat by the heat pump 5, and an indoor radiator 4 that supplies the circulating fluid 23 from the heat storage unit 2 and performs indoor air conditioning. The circulating fluid 23 circulates through the radiator 3.

  For this reason, even when the circulating fluid 23 cannot sufficiently exchange heat with the air in the room 15 by the indoor radiator 4, heat exchange is performed in the underfloor space 14. Can be raised.

  That is, since heat exchange in the indoor radiator 4 is heat exchange by contact with air, if the passing speed of the circulating fluid 23 is high or the temperature of the air around the indoor radiator 4 is high, sufficient heat is exchanged. It will flow out to the discharge pipe 62 without being exchanged.

  However, since the heat energy of the circulating fluid 23 that has once flowed out of the heat storage unit 2 is also lost due to transportation, it is possible to save resources by using it sufficiently effectively.

  Therefore, the heat energy of the circulating fluid 23 is sufficiently discharged to the underfloor space 14 by passing through the radiator 3 in the underfloor space 14. If the air in the underfloor space 14 is warmed by the radiator 3 in this way, the floor 10 can be warmed, and the indoor 15 can be heated by the radiant heat from the floor 10 whose temperature has risen, which is wasted. There is no. Furthermore, by warming the underfloor space 14, the housing of the unit building U can be kept warm, and the average temperature of the entire building can be raised to suppress the heat shock generated by the temperature difference between the rooms.

  In addition, heat can be efficiently stored by the heat pump 5 if the circulating fluid 23 is returned to the heat storage unit 2 after sufficiently radiating heat with the radiator 3 in the underfloor space 14 in this way.

  In other words, the coefficient of performance (COP) of the heat pump indicates that, in the case of heating of a compression heat pump, “heating output (ie, amount of heat released)” is “required power to be used as a heat medium (ie, a compressor that compresses the heat medium). The greater the amount of heat released, the greater the coefficient of performance (COP) and the better the energy efficiency.

  Furthermore, since the heat storage part 2 is installed in the underfloor space 14 and the heat insulating part 22 is provided on the outer periphery thereof, the heat storage part 2 can be installed in the vicinity of the indoor radiator 4, so that energy loss between them can be reduced and indoor heat radiation can be achieved. The output performance of the device 4 can be increased.

  Moreover, since this heat storage part 2 has few piping and can be made into a simple structure, even if it is underfloor space 14, it can fully install.

  Furthermore, even if heat leaks through the heat insulating portion 22, it is used to warm the underfloor space 14, so that it indirectly contributes to heating the interior 15 and there is no waste and is excellent in energy efficiency. ing.

  Moreover, by enclosing the underfloor space 14 with concrete and arranging the heat insulating material 13 to form a heat insulating structure, the heat of the underfloor space 14 can be efficiently warmed by the radiator 3, and the warm air is transmitted to the floor 10. Thus, floor heating of the room 15 can be performed.

  Although the above-described operation of the heating / cooling system S has been described mainly in the case of heating, the same effect can be obtained with the heating / cooling system S of the present embodiment even when cold water is stored in the heat storage unit 2 during cooling. Obtainable.

  Furthermore, the unit building U equipped with such a heating / cooling system S can make the entire building warm / cool with good energy efficiency.

  Although the best embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are possible. Are included in the present invention.

  For example, in the said embodiment, although the heat radiator 3 which made the pipe meander was demonstrated as an underfloor heat exchanger, it is not limited to this, A radiator, a heat pipe, a tank with low heat insulation performance, bottom concrete 11 etc. Any form of heat exchanger, such as an embedded pipe embedded in the pipe, may be used.

  Moreover, in the said embodiment, although the thermal storage part 2 and the heat radiator 3 were installed in the underfloor space of the lowest layer of a building, it is not limited to this, For example, an indoor heat exchanger is made into the second floor room. When installed, it may be configured to install an underfloor heat exchanger in the underfloor space on the second floor. Furthermore, the heat storage unit 2 may be installed outside the floor 18 instead of the underfloor space 14.

  Furthermore, although the circulating fluid has been described as water in the above embodiment, the present invention is not limited to this, and a heat transport medium that can circulate between the heat storage unit 2, the indoor radiator 4, and the radiator 3 is used. Any fluid may be used as long as it is present.

  Moreover, the heat insulation part 22 of the heat storage part 2 may form the outer shell of the heat storage tank 21 with a heat insulating material.

  Furthermore, although the said embodiment demonstrated the case where the indoor heat radiator 4 was installed in the indoors 15, such as a living room, it is not limited to this, Indoor heat exchange is carried out to non-residential rooms, such as a corridor, a washroom, and a kitchen A vessel may be installed. Further, the indoor space heated by the indoor heat exchanger and the indoor space with the floor heated by the underfloor heat exchanger may not be the same space.

It is explanatory drawing explaining the structure of the unit building which has arrange | positioned the heating / cooling system of the best embodiment of this invention. It is explanatory drawing explaining the flow of the heat medium and circulating fluid of a heating / cooling system.

Explanation of symbols

S Heating / cooling system U Unit building 2 Thermal storage unit 23 Circulating fluid 3 Radiator (underfloor heat exchanger)
4 Indoor radiator (indoor heat exchanger)
5 Heat pump 6 Circulation pipe line 10 Floor 11 Bottom base concrete 12 Side wall concrete 13 Heat insulating material 14 Under floor space 15 Indoor (inside of building)

Claims (4)

A heat storage unit that stores a circulating fluid that is stored through a heat medium of a heat pump, an indoor heat exchanger that is installed inside the building and that is supplied with the circulating fluid from the heat storage unit, and is installed in an underfloor space of the building And an underfloor heat exchanger that passes through the circulating fluid discharged from the indoor heat exchanger,
The said circulating fluid circulates through the said thermal storage part, the said indoor heat exchanger, and the said underfloor heat exchanger, The heating / cooling system characterized by the above-mentioned.   The heating / cooling system according to claim 1, wherein the heat storage unit is installed in the underfloor space, and an outer periphery thereof is covered with a heat insulating unit.   3. The underfloor space is an underfloor space on the lowest floor of a building surrounded by a floor, bottom base concrete, and side wall concrete, and a heat insulating material is attached to the side wall concrete. The heating and cooling system described. A unit building comprising the heating and cooling system according to any one of claims 1 to 3.

Images