JP2009102969A - Heat insulation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulation method inhibiting heat transfer between spaces different in temperature. <P>SOLUTION: Heat insulation of a closed space is achieved by collecting heat emitted from the closed space as heat loss and returning the heat to the closed space. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat insulating method for recovering thermal energy released from a closed space to a non-closed space and returning the recovered thermal energy to the closed space to reduce the heat energy released from the closed space to the non-closed space.

2. Description of the Related Art Conventionally, when air-conditioning in a closed space is performed, air that has been air-conditioned in the closed space is transmitted with air-conditioning energy from a partition that shields the closed space and the non-closed space to generate heat loss. In order to prevent the heat loss, a double sash or a pair glass is used, or a heat insulating material is provided inside the partition wall to increase the heat resistance.
However, although the heat insulation treatment of the partition walls of the house, the double glazing, and the “highly airtight high heat insulation” method for improving the heat insulation performance of the whole house have been devised, there are drawbacks in that the construction cost becomes high.

In addition, it is relatively easy to heat-treat the building walls and increase the heat resistance, but it is essential to transmit light in terrace houses and greenhouses for plant cultivation that require daylighting. It is not easy to increase the thermal resistance of the partition walls, and there is a problem that the construction cost extremely increases due to the heat insulation treatment.

Further, in a narrow space such as a vehicle, there is a problem that a sufficient heat insulating effect cannot be obtained because a sufficient space for a heat insulating material cannot be secured in the partition wall in order to make the indoor space as much as possible.
Furthermore, no matter how much the heat insulation of the partition wall is improved, the heat transfer rate is reduced, and heat exchange between the enclosed space and the non-enclosed space cannot be completely prevented. It has occurred.
Patent Publication 2006-241773 Patent Publication 2006-117133 Patent application 2000-251682

The present invention has been made in order to solve the above-described conventional problems, and an object of the present invention is to provide an inexpensive and simple heat insulation method by reducing heat transfer from a closed space to a non-closed space. .

According to the first aspect of the present invention, a heat recovery space is provided between the closed space and the non-closed space, and the heat energy released from the closed space is temporarily absorbed by the gas in the heat recovery space.
The heat transmitted from the closed space to the heat recovery space is recovered and returned to the closed space, whereby the temperature of the gas in the heat recovery space is kept substantially constant.
That is, the heat transferred from the closed space into the heat recovery space is returned to the closed space without being transferred to the non-closed space, so that heat transfer from the closed space to the non-closed space can be prevented.

According to the second aspect of the present invention, means for recovering heat transferred from the closed space into the heat recovery space and transferring the heat into the closed space is performed by a heat transfer means such as a heat pump.

According to the third aspect of the present invention, the temperature of the gas in the heat recovery space is controlled between the gas temperature in the non-closed space and the gas temperature in the closed space. Is smaller than the temperature difference between the non-closed space and the closed space, and heat transfer from the heat recovery space to the non-closed space can be reduced.

The effects of the present invention will be described with reference to the drawings.
In general, the heat flux density J from indoor to outdoor in a house is expressed as follows when the wall temperature is Tw and the outside air temperature is T0 (when Tw> T0).
J = α · (Tw−T0) (1)
That is, it can be said that the smaller the temperature difference between the room and the room, and the smaller the heat transfer coefficient of the partition wall, the smaller the heat released from the room to the room.

FIG. 5 shows a case where the closed space is simply in contact with the non-closed space via the heat recovery space, where T0 <T1 when the temperature T0 of the closed space, the temperature T1 of the heat recovery space, and the temperature T2 of the non-closed space are assumed. <T2 or T0>T1> T2.
In this case, the closed space 1 and the non-closed space 3 are simply insulated by the gas in the heat recovery space 2, and the heat 40 transferred from the closed space 1 to the gas in the heat recovery space 2 is further reduced to the non-closed space. 3 is transferred to heat loss. That is, a simple heat insulating function only reduces the heat transfer rate from the closed space 1 to the non-closed space 30 and does not reduce heat loss.

In the present invention, heat is recovered from the gas in the heat recovery space by a heat pump or the like, and the heat is returned to the closed space, so that the temperature T1 in the heat recovery space becomes close to T2 as shown in FIG. The temperature difference in the collection space 2 becomes large. As a result, the heat transfer from the closed space 1 to the heat recovery space 2 increases, but the moved heat 41 is recovered from the heat recovery space and returned to the closed space. On the other hand, since the difference between the temperature T1 of the heat recovery space 2 and the temperature T0 of the non-closed space 3 is reduced by heat recovery, the heat transfer 40 from the heat recovery space 2 to the non-closed space 3 is reduced.
As a result, it is possible to reduce the heat loss 40 released from the closed space 1 that is a heat source to the non-closed space 3 via the heat recovery space 2.

In general, air conditioning by a heat pump performs heat transfer between the outside air, that is, the non-closed space, and the room, that is, the closed space, but in the present invention, heat is not recovered from the non-closed space, that is, outside air, but from the gas in the heat recovery space. Since the temperature in the heat recovery space is between the gas temperature in the non-closed space and the closed space, the temperature difference in heat transfer by the heat pump is smaller than in the case of heat recovery from the non-closed space. Become.
As the temperature difference is reduced, the energy efficiency COP (Coefficient of Performance) of the heat pump is increased.
This means that less energy is consumed by the heat pump than when recovering the thermal energy released into the non-closed space.
That is, the present invention reduces the energy consumption of the heat pump for heat transfer in order to recover the heat energy discharged from the closed space to the non-closed space from the heat recovery space having a small temperature difference from the temperature in the closed space. It becomes possible to do.

In addition, the heat insulation method according to the present invention only needs to have a space in which the gas can flow in the heat recovery space, and heat insulation can be performed without sacrificing the indoor space as compared with heat insulation by a heat insulating material. This is particularly effective when there are many restrictions or when light transmission is required as in a greenhouse.
Furthermore, the heat insulation performance according to the present invention does not depend on confidentiality, and heat insulation is performed by collecting the heat dissipated, so that the heat insulation effect can be obtained even if the heat collection space is not necessarily airtight. Therefore, it is possible to reduce the cost of heat insulation measures for the structure.

  Next, an embodiment of a heat insulation method according to the present invention will be described in detail with reference to the drawings.

First Embodiment FIG. 1 is an embodiment according to the present invention, and is an example applied to heating of a closed space 1.
The heat transferred from the closed space 1 surrounded by the partition wall 4 to the heat recovery space 2 is recovered by the evaporator 6 and moved to the closed space by the condenser 6a.
As a result, the heat released from the closed space 1 to the heat recovery space 2 is transferred again to the closed space 1, so that the temperature change in the closed space 1 does not occur in the ideal state and the closed space is insulated. .

Second Embodiment FIG. 2 shows an embodiment according to the present invention, which is an example applied to hot water type floor heating.
The hot water in the hot water storage tank 12 heated by the heat exchanger 13 of the heat pump is heated by the heat exchanger 13 connected to the hot water return pipe 11 by radiatively heating the closed space by the floor heating panel 14 and again the hot water storage tank 12. Return.
The floor heating panel 14 radiates and heats the closed space from the floor surface. At the same time, heat is radiated to the heat recovery space 2 to cause heat loss. The heat is recovered by the heat pump 20 and the warm water of the warm water return 11 from the floor heating panel 14 is heated by the heat exchanger 13, thereby preventing the occurrence of heat loss.

3rd Example FIG. 3: is one Example by this invention, and is the example applied to the heating of the house of house cultivation.
The partition 4 is like a transparent vinyl sheet and isolates the closed space 1 and the heat recovery space 2.
The heat transferred from the closed space 1 to the heat recovery space 2 is recovered by the outdoor unit 31 and returned to the closed space by the indoor unit 30.

Fourth Embodiment FIG. 4 shows an embodiment according to the present invention. In the third embodiment, the transparent vinyl sheet partition 4 is provided only on the ceiling, and the gas temperature recovered in the heat recovery space 2 is shown. Is lower than the temperature in the closed space 1 and descends along the wall surface due to the difference in specific gravity of the gas, so that a heat insulating effect can be obtained without necessarily isolating the wall surface.

  As mentioned above, although embodiment of the heat insulation method by this invention was described in detail, this invention is not limited to embodiment mentioned above, It can change in the range which does not deviate from the summary.

The block diagram which shows one Embodiment of the heat insulation method by this invention. The block diagram which shows one Embodiment of the heat insulation method by this invention. The block diagram which shows one Embodiment of the heat insulation method by this invention. The block diagram which shows one Embodiment of the heat insulation method by this invention. Conventional heat transfer concept of double wall Wall heat transfer concept diagram according to the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Closed space 2 Heat recovery space 3 Non-closed space 4 Partition 5 Compressor 6 Evaporator 6a Condenser 7 Expansion valve 8 Heat recovery duct 9 Refrigerant pipe 10 Hot water pipe 11 Hot water return pipe 12 Hot water tank 13 Heat exchanger 20 Heat pump for heat insulation 21 Heat Pump 30 for Floor Heating Indoor Unit 31 Outdoor Unit 40 Heat Transfer 41 Heat Recovery 42 Temperature Gradient

Claims (3)

  By recovering the heat transferred from the closed space to the heat recovery space and returning the recovered heat to the closed space in a closed space where at least a part of the periphery of the closed space is in contact with the non-closed space via the heat recovery space A heat insulation method for a closed space that prevents heat transfer from the closed space to the non-closed space. The heat insulation method according to claim 1,
A heat insulation method comprising a heat pump for heat transfer from a heat recovery space to a closed space. In the heat insulation method of Claim 1 or Claim 2,
A heat insulation method, wherein the temperature of the heat recovery space is controlled to a range between the gas temperature in the non-closed space and the gas temperature in the closed space.

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