JP5795925B2 - Heat storage method for latent heat storage material, and indoor temperature control method using latent heat storage material - Google Patents

Description

  The present invention relates to a heat storage method for a latent heat storage material, and a control method for room temperature using the latent heat storage material.

  Although the indoor temperature in a house is mainly adjusted by a heating facility or a cooling facility, in recent years, there has been a strong demand for reducing power consumption of the heating facility. Thus, it is known to arrange a latent heat storage material on the ceiling or floor of a house to mitigate changes in room temperature. For example, in Patent Document 1, the temperature change of the room space is alleviated throughout the year by making the melting point of the latent heat storage material arranged on the floor lower than the melting point of the latent heat storage material arranged on the ceiling. Thus, it is disclosed to reduce the heating / cooling load.

  Here, the “latent heat storage material” is also referred to as PCM (Phase Change Material), and is a heat storage material that uses latent heat when a substance undergoes a phase change between a solid phase and a liquid phase. That is, when the temperature of the solid-phase latent heat storage material rises and reaches the melting point of the latent heat storage material, the latent heat storage material melts and absorbs heat of fusion from the outside. On the other hand, when the temperature of the liquid-phase latent heat storage material decreases and reaches the freezing point of the latent heat storage material, the latent heat storage material solidifies and releases solidification heat to the outside. In general, since the melting point and the freezing point coincide with each other, the term “melting point” is used below.

  In general, it is also known that a heat storage material such as a latent heat storage material is actively stored at night by relatively inexpensive nighttime power, and the stored heat or cold is used in a time zone other than nighttime. In the case of storing heat in the heat storage material at night, the temperature of the heat storage material is set to a predetermined temperature or higher by performing heat storage control that resumes heat storage when the temperature of the heat storage material that has been sufficiently stored decreases to the predetermined temperature. It is possible to maintain.

  However, when the environmental load such as the climate is small, it is not necessary to store heat over the entire midnight power period, so it is preferable to control the heat storage so that the nighttime power is used for a predetermined time by a timer. For example, in Patent Document 2, for a heat storage type heating device that stores heat in a heat storage body by energizing the heat generation body for a predetermined time at night, the power supply time to the heat generation body is calculated based on the measured temperature of the heat storage body. It is disclosed.

JP 2010-1677 A JP 2001-147023 A

  However, in the heat storage method disclosed in Patent Document 2 above, time-converted data of the heat storage body temperature before a certain time in the midnight power time zone and time-converted data of the heat storage body temperature at the same time on the previous day stored in the memory. Since the energization time is calculated using the energization time data of the previous day and various measurement data are required for the calculation, there is a problem that the calculation method is very complicated.

  In addition, for example, when heating the heat storage body by time control, depending on the external environment conditions, even though the latent heat storage material in the heat storage body is completely melted, unnecessary heating or excessive heating is performed. As a result, the safety may be impaired. The above-mentioned Patent Document 2 aims to prevent overheating by detecting the temperature of the heat storage body. For example, as described in paragraph [0028] of Patent Document 2, the room temperature setting is maintained at 18 ° C. It is assumed that the temperature of the heat storage body is heated to 50 ° C. or higher, and is clearly heated excessively with respect to room temperature.

  The present invention has been made in view of such a point, and the object of the present invention is to store heat accurately and efficiently with respect to the latent heat storage material while eliminating the need for complicated calculations based on various measurement data. There is to try.

In order to achieve the above object, the first invention is directed to a heat storage method for a latent heat storage material that is installed in a house and heats and cools the room. Then, the degree of deformation of each container containing the first and second latent heat storage materials made of paraffin wax or the change in atmospheric pressure inside each container is measured, and from the result, the first and second latent heat storages are measured. Each of the phase states of the material is detected by a detection means, and when it is detected that at least a part of the first latent heat storage material is in a solid phase, the proximity to the container that stores the first latent heat storage material The first latent heat storage material is started when it is detected that all of the heated first latent heat storage material is in a liquid phase. A first control mode for terminating heating of the material, and when the at least a part of the second latent heat storage material is detected to be in a liquid phase state, the container that stores the second latent heat storage material The cooling unit provided close to the above A second control mode for starting cooling of the second latent heat storage material and ending the cooling of the second latent heat storage material when it is detected that all of the cooled second latent heat storage materials are in a solid phase; I do.

  In the first aspect of the invention, the complicated calculation based on a plurality of various measurement data is not required, but the phase state of the first and second latent heat storage materials is directly detected, so that it is not affected by environmental conditions. It becomes possible to store heat in the first and second latent heat storage materials accurately and efficiently.

According to a second aspect, in the first aspect, the detection means includes a degree of deformation of each container that stores the first and second latent heat storage materials or a change in atmospheric pressure inside each container. A plurality of sensors for measurement are provided, and in the first control mode, it is detected from all measurement results of the sensors that all of the heated first latent heat storage materials are in a liquid phase state. While the heating to the first latent heat storage material is finished, in the second control mode, it is detected from all the measurement results of the sensor that the cooled second latent heat storage material is in a solid state. Then, the cooling to the second latent heat storage material is finished.

  In this 2nd invention, it becomes possible to perform a 1st and 2nd control mode in a more preferable aspect by using a some sensor.

  According to a third invention, in the first or second invention, each of the first and second latent heat storage materials includes an elastic material, while each of the containers is configured to be deformable, and the detection means Detects the phase states of the first and second latent heat storage materials from the result of measuring the degree of deformation of the container according to the pressing when the container is pressed from the outside with a constant external force. .

  In the third aspect of the invention, since the latent heat storage material includes an elastic material, for example, as the latent heat storage material pressed with a constant external force changes from a solid phase to a liquid phase, the accommodation according to the pressing is performed. The degree of body deformation increases. Therefore, the phase state of the latent heat storage material can be detected by measuring the degree of deformation.

  According to a fourth invention, in the first or second invention, the detection means detects the phase states of the first and second latent heat storage materials from the result of measuring the atmospheric pressure inside the container.

  In the fourth aspect of the present invention, for example, when a paraffin-based latent heat storage material is used as the first and second latent heat storage materials stored in the container, the latent heat storage material changes from a liquid phase to a solid phase. The volume of the heat storage material is reduced, and the atmospheric pressure inside the container is reduced. On the contrary, when the latent heat storage material changes from the solid phase to the liquid phase, the volume of the latent heat storage material increases, and the pressure inside the container increases. Therefore, it is possible to detect the phase state of the latent heat storage material by measuring the atmospheric pressure inside the container.

  In a fifth aspect based on any one of the first to fourth aspects, the first control mode is performed in winter, while the second control mode is performed in summer.

  In the fifth aspect of the invention, it is possible to store heat in the latent heat storage material accurately and efficiently without being influenced by environmental conditions, while eliminating complicated calculations throughout the year.

  6th invention controls the indoor temperature of the house in which the cooling device which cools a room | chamber interior was provided using the said 2nd latent heat storage material heat-stored by the heat storage method to the latent heat storage material which concerns on the said 1st invention. Intended for how to do. And before starting the operation | movement of the said air_conditioning | cooling apparatus, all the said 2nd latent heat storage materials are made into a solid-phase state previously.

  In the sixth aspect of the invention, since the operation of the cooling device can be started in a state where all of the second latent heat storage material is in a solid phase state in advance, the cooling capacity is for heat storage to the second latent heat storage material at the beginning of the operation. Not consumed. As a result, since the efficiency of the cooling operation is increased, the room temperature is suitably controlled from the beginning of the operation.

  7th invention controls the indoor temperature of the house in which the heating equipment which heats a room | chamber interior was provided using the said 1st latent heat storage material heat-stored by the heat storage method to the latent heat storage material which concerns on the said 1st invention. Intended for how to do. Then, before starting the operation of the heating device, all the first latent heat storage materials are set in a liquid phase state in advance.

  In the seventh aspect of the invention, since the operation of the heating device can be started in a state where all of the first latent heat storage material is in the liquid phase state in advance, the heating capacity is for heat storage to the first latent heat storage material at the beginning of the operation. Not consumed. As a result, since the efficiency of the heating operation is increased, the room temperature is suitably controlled from the beginning of the operation.

  An eighth aspect of the invention is provided with an air conditioner that performs a cooling operation and a heating operation using the first and second latent heat storage materials stored by the heat storage method for the latent heat storage material according to the first invention. The method is intended to control the indoor temperature of a house. The first control mode is performed when the air conditioner is performing a heating operation, while the second control mode is performed when the air conditioner is performing a cooling operation.

  In the eighth aspect of the invention, the first control mode is performed in winter and the second control mode is switched in summer. Thus, the heat storage to the latent heat storage material is appropriately performed while the phase state of the latent heat storage material is directly detected by the detection means. As a result, it is possible to appropriately control the room temperature by storing heat in the latent heat storage material accurately and efficiently, regardless of environmental conditions, while eliminating the need for complicated calculations throughout the year.

  According to the first aspect of the present invention, it is possible to store heat in the first and second latent heat storage materials accurately and efficiently without depending on environmental conditions, while eliminating the need for complicated calculations based on a plurality of various measurement data. .

  According to the second invention, the first and second control modes can be performed in a more preferable manner by using a plurality of sensors.

  According to the third invention, when the container is pressed from the outside with a constant external force, the phase state of the latent heat storage material is suitably detected by measuring the degree of deformation of the container according to the pressing. can do.

  According to 4th invention, the phase state of the said 1st and 2nd latent heat storage material can be detected suitably by measuring the atmospheric pressure inside the container which accommodates the 1st and 2nd latent heat storage material. .

  According to the fifth aspect of the invention, the first control mode is performed in winter and the second control mode is performed in summer, so that complicated calculations are unnecessary throughout the year, but are not affected by environmental conditions. Thus, heat can be stored in the latent heat storage material accurately and efficiently.

  According to the sixth aspect of the invention, since the operation of the cooling device can be started in a state where all of the second latent heat storage material is in a solid state in advance, the cooling capacity is for heat storage to the second latent heat storage material at the beginning of the operation. The room temperature can be suitably controlled from the beginning of operation.

  According to the seventh aspect of the invention, since the operation of the heating device can be started in a state where all of the first latent heat storage material is in a liquid phase state in advance, the heating capacity is for heat storage to the first latent heat storage material at the beginning of the operation. The room temperature can be suitably controlled from the beginning of operation.

  According to the eighth invention, the first control mode is performed in the winter and the second control mode is performed in the summer, so that the latent heat can be accurately and efficiently obtained throughout the year without the need for complicated calculations. Heat is stored in the heat storage material, and the room temperature can be suitably controlled.

FIG. 1 is a perspective view showing a house where the room temperature is controlled in the present embodiment. FIG. 2 is a flowchart showing a heat storage method for the first latent heat storage material when the room is heated. FIG. 3 is a flowchart showing a heat storage method for the second latent heat storage material when the room is cooled. FIG. 4 is an explanatory diagram schematically showing the configuration of the first heat storage unit in the first embodiment. FIG. 5 is an explanatory diagram schematically showing the configuration of the second heat storage unit in the first embodiment. FIG. 6 is an explanatory diagram illustrating a state in which the first latent heat storage material is in a liquid phase with respect to the first heat storage unit in the second embodiment. FIG. 7 is an explanatory diagram showing a state in which the first latent heat storage material is a solid phase for the first heat storage unit in the second embodiment. FIG. 8 is an explanatory diagram schematically showing the configuration of the second heat storage unit in the second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.

Embodiment 1 of the Invention
1 to 5 show Embodiment 1 of the present invention.

  FIG. 1 is a perspective view showing a house 10 in which the room temperature is controlled in the present embodiment. FIG. 2 is a flowchart showing a heat storage method for the first latent heat storage material 21 when the room is heated. FIG. 3 is a flowchart showing a heat storage method for the second latent heat storage material 23 when the room is cooled. FIG. 4 is an explanatory diagram schematically showing the configuration of the first heat storage unit 30 in the first embodiment. FIG. 5 is an explanatory diagram schematically showing the configuration of the second heat storage unit 40 in the first embodiment.

  As shown in FIG. 1, the house 10 includes a ceiling portion 12, a floor portion 14, and a wall portion 16, and an indoor space A is configured by being surrounded by these. In addition, a roof 17 is provided on the top of the ceiling portion 12, and a hut space B is formed between the ceiling portion 12 and the roof 17. Further, an underfloor space C is formed between the indoor space A and the ground. And the house 10 has the heat insulation performance corresponded to a new energy saving standard (IV area), for example.

  In addition, the air conditioner 5 configured to perform the cooling operation and the heating operation is provided in the wall portion 16 in the house 10. That is, the air conditioner 5 is a cooling device and a heating device.

  The floor portion 14 is provided with a plurality of first heat storage portions 30 and a sheet-like heating element 29. The heating element 29 is formed by, for example, an electric heater. As shown in FIG. 4, the first heat storage unit 30 includes a first latent heat storage material 21 in which, for example, paraffin wax and an elastomer are mixed, and a container 19 that stores the first latent heat storage material 21. . The container 19 is configured to be deformable, and is formed of, for example, an aluminum pack. The first heat storage unit 30 is placed on the heating element 29.

  At this time, normal paraffin is preferably used as the paraffin wax. For example, assuming a heating operation, when the indoor temperature setting is 18 ° C. to 24 ° C., a first latent heat storage material (eg, normal heptadecane) having a melting point in the temperature range of about 16 ° C. to 26 ° C. is preferably used. . In this case, a thermoplastic elastomer (for example, a styrene elastomer, an olefin elastomer, etc.) is preferably used as the elastomer. And the latent heat storage material which mixed 70-90 weight% of normal paraffin and 10-30 weight% of thermoplastic elastomers uniformly is used suitably.

  In this case, the normal paraffin and the thermoplastic elastomer do not change the melting point depending on the mixing ratio, the normal paraffin is added as a latent heat storage material, and the thermoplastic elastomer is added for the purpose of eliminating the fluidity of the normal paraffin and constituting an elastic body. Yes.

  The ceiling part 12 is provided with a plurality of second heat storage parts 40 and cooling parts 39. The cooling unit 39 is for cooling the second heat storage unit 40 by, for example, an air cooling method, a water cooling method, or an electrical method. As shown in FIG. 5, the second heat storage unit 40 includes, for example, a second latent heat storage material 23 in which paraffin wax and an elastomer are mixed, and a container 19 that stores the second latent heat storage material 23. . The second heat storage unit 40 is placed on the cooling unit 39.

  At this time, normal paraffin is preferably used as the paraffin wax. For example, assuming a cooling operation, when the room temperature is set to 22 ° C. to 26 ° C., a second latent heat storage material (eg, normal octadecane) having a melting point in the temperature range of about 20 ° C. to 28 ° C. is preferably used. In this case, a thermoplastic elastomer (for example, a styrene elastomer, an olefin elastomer, etc.) is preferably used as the elastomer. And the latent heat storage material which mixed 70-90 weight% of normal paraffin and 10-30 weight% of thermoplastic elastomers uniformly is used suitably.

  And in this embodiment, the detection means 50 for detecting the phase state of the 1st latent heat storage material 21 and the 2nd latent heat storage material 23 is provided. As shown in FIGS. 4 and 5, the detection unit 50 includes a weight 36 as a pressing unit placed on the first heat storage unit 30 and the second heat storage unit 40, a sensor 37 as a measurement unit, and a control unit. Part 38.

  Thus, the detection means 50 detects the degree of deformation of the first latent heat storage material 21 and the second latent heat storage material 23 pressed by a constant external force due to the load of the weight 36 from the outside of the container 19 (the degree of deformation of the container 19). ) Is measured, the phase state of the first latent heat storage material 21 and the second latent heat storage material 23 is detected.

  Here, since the 1st latent heat storage material 21 and the 2nd latent heat storage material 23 contain the thermoplastic elastomer which is an elastic material, they can deform | transform. When the normal paraffin mixed with the elastomer changes from the solid phase to the liquid phase, the degree of compressive deformation by being pressed by the load of the weight 36 changes. Then, as the first latent heat storage material 21 or the second latent heat storage material 23 changes from the solid phase to the liquid phase and the hardness decreases, the weight 36 is displaced downward.

  The sensor 37 is a displacement sensor for measuring the amount of vertical displacement of the weight 36. The displacement data measured by the sensor 37 is input to the control unit 38. Further, the control unit 38 includes a displacement amount from a reference position when the first latent heat storage material 21 or the second latent heat storage material 23 is completely in a solid phase, and the first or second latent heat storage material 21, 23. The displacement amount from the reference position when is completely in the liquid phase is input and held in advance.

  For example, the weight of the weight 36 is set to 500 g, for example. In this case, at least the lower surface of the weight 36 is formed in a convex curved surface shape. For example, a spherical weight 36 may be used. Furthermore, the displacement amount of the weight 36 when the first or second latent heat storage material 21, 23 is completely in a solid phase is assumed to be 0 mm from the reference position. At this time, the displacement amount of the weight 36 when the first or second latent heat storage material 21, 23 was completely in a liquid phase was 0.15 mm.

  Thus, the control unit 38 detects the phase state of the first latent heat storage material 21 or the second latent heat storage material 23 from the displacement amount of the weight 36 measured by the sensor 37.

  Specifically, the control unit 38 connected to the heating element 29 detects that at least a part of the first latent heat storage material 21 that is in the liquid phase state is in the solid phase state by the sensor 37. In addition, the first latent heat storage material 21 is heated while allowing the heating element 29 to be energized. Thereafter, when the sensor 37 detects that all of the first latent heat storage material 21 is in the liquid phase state (for example, the measured amount of change is about all of the plurality of installed sensors 37). When exceeding 0.15 mm), the energization to the heating element 29 is cut off, and the heating of the first latent heat storage material 21 is ended. Thus, heat storage of the first latent heat storage material 21 is performed efficiently.

  On the other hand, the control unit 38 connected to the cooling unit 39 performs cooling when the sensor 37 detects that at least a part of the second latent heat storage material 23 that is in the solid phase is in the liquid phase. The cooling of the second latent heat storage material 23 by the part 39 is allowed. Thereafter, when the sensor 37 detects that all of the second latent heat storage material 23 is in the solid phase state (for example, the measured transition of all of the plurality of installed sensors 37). When the amount reaches 0 mm), the cooling of the second latent heat storage material 23 by the cooling unit 39 is finished. Thus, heat storage of the second latent heat storage material 23 is also efficiently performed.

-Thermal storage method for latent heat storage materials-
Next, a heat storage method for the first latent heat storage material 21 and the second latent heat storage material 23 will be described. In the heat storage method in the present embodiment, for example, heat storage is performed in the midnight power time zone.

<Heat storage method for first latent heat storage material (first control mode)>
In the case of storing heat in the first latent heat storage material 21, for example, as shown in step S11 of FIG. 2, it is determined whether or not the current time is the midnight power time zone. If the current time is not the midnight power time zone, the first latent heat storage material 21 is not stored. On the other hand, if the current time is the midnight power time zone, the process proceeds to step S12.

  In step S12, the phase state of the first latent heat storage material 21 (shown as PCM in FIG. 2) is detected by the detection means 50, and whether or not at least a part of the first latent heat storage material 21 is in the solid phase state. Determine whether. That is, when the position of the weight 36 in the case where all the first latent heat storage materials 21 are in the liquid phase state is set as the reference position, when the upward displacement of the weight 36 is measured by the sensor 37, the control unit 38 It is determined that at least a part of the first latent heat storage material 21 is in a solid phase.

  When it is determined that at least a part of the first latent heat storage material 21 is in a solid phase, the process proceeds to step S13. On the other hand, when the rising displacement of the weight 36 is not measured and it is determined that the first latent heat storage material 21 is all in the liquid phase, the state in which the measurement of the displacement of the weight 36 is continued without proceeding to step S13. Thus, the determination in step S12 is repeated.

  In step S <b> 13, the controller 38 allows the heating element 29 to be energized, thereby starting heating of the first latent heat storage material 21 by the heating element 29. Thereafter, the process proceeds to step S14. In step S14, it is determined whether or not all of the first latent heat storage material 21 is in a liquid phase state. That is, when the downward displacement of the weight 36 is measured and the weight 36 returns to the reference position, it is determined that all of the first latent heat storage material 21 is in the liquid phase state, and the process proceeds to step S15. On the other hand, if it is measured that the position of the weight 36 is not at the reference position, the determination in step S14 is repeated while heating is continued.

  In step S <b> 15, the energization of the heating element 29 is interrupted to end the heating, and the heat storage to the first latent heat storage material 21 is interrupted. Then, it returns to step S11. In this way, a series of steps S11 to S15 (first control mode) are repeated during the midnight power period.

  Moreover, although it demonstrated based on the control mode which considered the midnight power time slot | zone here, it is not necessarily aiming at heating only in the midnight power time slot | zone. Not only in the above embodiment, when heat is stored in the first latent heat storage material 21, the first heat storage body is directly heated from the heating element 29 provided close to the first latent heat storage body. For example, it is possible to perform heating in a concentrated, efficient and speedy manner by heating the solid phase first latent heat storage material until it becomes a liquid phase by using an indoor air conditioner such as an air conditioner or a panel heater.

  For example, heat storage to the first latent heat storage material 21 is started by the heating element 29 at the same time when the air conditioner 5 is turned on, and the heating is terminated when the liquid state is completely confirmed while the phase state is confirmed by the sensor 37. Therefore, efficient and intensive heating is possible, and a control method that contributes to energy saving can be provided.

<Heat storage method for second latent heat storage material (second control mode)>
In the case of storing heat in the second latent heat storage material 23, first, as shown in step S21 of FIG. If the current time is not in the midnight power time zone, the second latent heat storage material 23 is not stored. On the other hand, if the current time is the midnight power time zone, the process proceeds to step S22.

  In step S22, the phase state of the second latent heat storage material 23 (shown as PCM in FIG. 3) is detected by the detection means 50, and whether or not at least a part of the second latent heat storage material 23 is in the liquid phase state. Determine whether. That is, when the position of the weight 36 when the second latent heat storage material 23 is all in a solid phase is set as the reference position, when the downward displacement of the weight 36 is measured by the sensor 37, the control unit 38 It is determined that at least a part of the second latent heat storage material 23 is in a liquid phase.

  When it is determined that at least a part of the second latent heat storage material 23 is in a liquid phase, the process proceeds to step S23. On the other hand, when the downward displacement of the weight 36 is not measured and it is determined that the second latent heat storage material 23 is all in the solid phase, the state in which the measurement of the displacement of the weight 36 is continued without proceeding to step S23. Thus, the determination in step S22 is repeated.

  In step S <b> 23, the control unit 38 allows the second latent heat storage material 23 to be cooled by the cooling unit 39. Thereafter, the process proceeds to step S24. In step S24, it is determined whether or not all of the second latent heat storage material 23 is in a solid phase state. That is, when the upward displacement of the weight 36 is measured and the weight 36 returns to the reference position, it is determined that all of the second latent heat storage material 23 is in the solid phase state, and the process proceeds to step S25. On the other hand, if it is measured that the position of the weight 36 is not at the reference position, the determination in step S24 is repeated while continuing cooling.

  In step S25, the cooling of the second latent heat storage material 23 is terminated, and the heat storage to the second latent heat storage material 23 is interrupted. Then, it returns to step S21. In this way, a series of steps S21 to S25 (second control mode) is repeated during the midnight power period.

  Thus, the first control mode and the second control mode are switched according to, for example, the season. That is, the first control mode is performed in winter, while the second control mode is performed in summer.

  Further, as in the first control mode, the purpose is not necessarily to perform cooling only in the late-night power hours. Not only the said Example but when cooling the 2nd latent heat storage material 23, it cools to the 2nd latent heat storage body 23 directly from the cooling part 39 provided close to the 2nd latent heat storage body 23. Therefore, it is possible to cool the liquid phase second latent heat storage material 23 intensively, efficiently and speedily, rather than cooling the liquid phase second latent heat storage material 23 to the solid phase by an indoor air conditioner such as an air conditioner or a panel heater.

  For example, heat storage to the second latent heat storage material 23 is started by the cooling unit 39 at the same time when the air conditioner 5 is turned on, and the cooling is terminated when the phase state is completely confirmed by the sensor 37 and the solid state is reached. Therefore, efficient and concentrated cooling is possible, and a control method that contributes to energy saving can be provided.

-Controlling room temperature using latent heat storage material-
Next, the indoor temperature control method using the first latent heat storage material 21 and the second latent heat storage material 23 will be described.

  The room temperature of the house 10 is controlled by the temperature of the first latent heat storage material 21 and the heating operation of the air conditioner 5 during heating (first control mode). On the other hand, the indoor temperature of the house 10 is controlled by the cooling of the second latent heat storage material 23 and the cooling operation of the air conditioner 5 during the cooling (second control mode).

  And when controlling room temperature at the time of heating, before starting the heating operation of the air conditioner 5, the said 1st control mode is performed and all the 1st latent heat storage materials 21 are made into a liquid phase state previously. On the other hand, when the room temperature is controlled at the time of cooling, the second control mode is performed in advance to set all the second latent heat storage materials 23 in a solid phase state before the cooling operation of the air conditioner 5 is started.

  In addition, it is preferable to provide a plurality of sensors 37 as described above, and to stop heating (cooling) when all the sensors 37 indicate a liquid phase (or solid phase).

  The first control mode and the second control mode are switched according to, for example, a heating operation and a cooling operation by the air conditioner 5. That is, when the air conditioner 5 performs the heating operation, the first control mode is performed to store heat in the first latent heat storage material 21, while when the air conditioner 5 performs the cooling operation, the second control mode is switched to the second latent heat. The heat storage material 23 stores heat.

-Effect of Embodiment 1-
Therefore, according to the first embodiment, the phase state of the first and second latent heat storage materials 21 and 23 is directly detected by the detection means 50, and at least a part of the first latent heat storage material 21 is in the first control mode. While in the solid phase state, the latent heat storage material 21 is heated to store heat, and when all of the first latent heat storage material 21 is in the liquid phase state, the heating is terminated, while in the second control mode, When at least part of the second latent heat storage material 23 is in a liquid phase state, the latent heat storage material 23 is cooled to store heat, and when all of the second latent heat storage material 23 is in a solid phase state, cooling is performed. Therefore, the environmental conditions can be directly detected by detecting the phase states of the first and second latent heat storage materials 21 and 23 while eliminating the need for complicated calculations based on a plurality of various measurement data. Without being affected by It can be efficiently accumulated in the first and second latent heat storage material 21, 23.

  Further, the detection means 50 including the weight 36 and the sensor 37 measures the degree of deformation of the first and second latent heat storage materials 21 and 23 including the elastic material pressed with a constant external force. The phase state of the materials 21 and 23 can be detected suitably.

  Furthermore, the air conditioner is started in a state where all of the second latent heat storage material 23 is in a solid state in advance while the operation of the heating device is started in a state where all of the first latent heat storage material 21 is in a liquid phase state. Since the cooling operation of 5 is started, the heating capacity or the cooling capacity is not consumed for the heat storage to the latent heat storage materials 21 and 23 at the beginning of the operation, and the room temperature can be suitably controlled from the beginning of the operation. it can.

  In addition, since the first control mode is performed in winter and the second control mode is performed in summer, heat is stored in the latent heat storage material accurately and efficiently throughout the year without the need for complicated calculations. Thus, the room temperature can be suitably controlled.

<< Embodiment 2 of the Invention >>
6 to 8 show Embodiment 2 of the present invention. In the following embodiments, the same portions as those in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first embodiment, the phase state of the first and second latent heat storage materials 21 and 23 is detected by measuring the amount of displacement of the weight 36. In the present embodiment, the atmospheric pressure in the container 41 is measured. By doing so, the phase states of the first and second latent heat storage materials 21 and 23 are detected.

  The first and second latent heat storage materials 21 and 23 in the present embodiment are made of, for example, paraffin wax, and are the same as those in the first embodiment. Moreover, the 1st heat storage part 30 and the 2nd heat storage part 40 in this embodiment have the container 41 which consists of containers, such as polyethylene, as shown in FIGS. A pressure sensor 42 for measuring the pressure inside the container 41 is provided on the upper inner wall surface of the container 41. The pressure data measured by the pressure sensor 42 is input to the control unit 43. Further, the container 41 of the first heat storage unit 30 is placed on the heating element 29. On the other hand, the container of the second heat storage unit 40 is placed on the cooling unit 39.

  When the first and second latent heat storage materials 21 and 23 stored in the container 41 change from the liquid phase state to the solid phase state, the volume of the latent heat storage materials 21 and 23 decreases. The atmospheric pressure drops. On the other hand, when the first and second latent heat storage materials 21 and 23 change from the solid phase state to the liquid phase state, the volume of the latent heat storage materials 21 and 23 increases, and thus the atmospheric pressure inside the container 41 increases.

  In the control unit 43, the atmospheric pressure in the container 41 when all of the first and second latent heat storage materials 21 and 23 are in the solid phase and the latent heat storage materials 21 and 23 when all of the latent heat storage materials 21 and 23 are in the liquid phase state. The atmospheric pressure in the container 41 is measured in advance and held. The detecting means 50 in the present embodiment measures the change in atmospheric pressure in the container 41 by the pressure sensor 42 and detects the phase state of the first and second latent heat storage materials 21 and 23.

  Here, when the first and second latent heat storage materials 21 and 23 were cooled and all were brought into a solid phase, the container 41 made of polyethylene was hardly deformed, and the pressure sensor 42 showed a reduced pressure state.

  In the first control mode shown in FIG. 2, the determination in step S <b> 12 is performed by the pressure sensor 42 and the control unit 43. That is, if the atmospheric pressure measured by the pressure sensor 42 is lower than when all of the first latent heat storage material 21 is in the liquid phase state, it is determined that at least a part thereof is in the solid phase state.

  On the other hand, also in the second control mode shown in FIG. 3, the determination in step S <b> 22 is performed by the pressure sensor 42 and the control unit 43. That is, if the atmospheric pressure measured by the pressure sensor 42 is higher than when all of the second latent heat storage material 23 is in the liquid phase state, it is determined that at least a part thereof is in the liquid phase state.

  In addition, it is preferable to provide a plurality of sensors 42 as described above, and to stop heating (cooling) when all the sensors 42 indicate a liquid phase (or solid phase).

-Effect of Embodiment 2-
Therefore, according to the second embodiment, similarly to the first embodiment, the phase state of the first and second latent heat storage materials 21 and 23 is directly detected by the detection means 50, and the first and second latent heat storage materials are detected. Since the heat storage control of 21 and 23 is performed, the phase state of the first and second latent heat storage materials 21 and 23 is directly detected without requiring a complicated calculation based on a plurality of various measurement data. Thus, the first and second latent heat storage materials 21 and 23 can store heat accurately and efficiently without being influenced by environmental conditions.

  Moreover, since the atmospheric pressure inside the container 41 that houses the first and second latent heat storage materials 21 and 23 is measured, the phase state of the latent heat storage materials 21 and 23 can be suitably detected.

<< Other Embodiments >>
In the first embodiment, the displacement amount of the weight 36 is measured, and in the second embodiment, the atmospheric pressure in the container 41 is measured. However, the electrical conductivity of the first and second latent heat storage materials 21, 23 is changed. May be measured. Also by this, the phase state of the first and second latent heat storage materials 21 and 23 can be detected based on the change in electrical conductivity.

  As described above, the present invention is useful for a heat storage method for a latent heat storage material and a method for controlling a room temperature using the latent heat storage material.

5 Air conditioner (cooling equipment, heating equipment)
19,41 container
21 First latent heat storage material
23 Second latent heat storage material
29 Heating element
37 sensors
38, 43 Control unit
39 Cooling unit
42 Pressure sensor
50 detection means

Claims (8)

A heat storage method for a latent heat storage material that is installed in a house and heats and cools the room,
Measure the degree of deformation of each container containing the first and second latent heat storage materials made of paraffin wax or the change in atmospheric pressure inside each container, and from the results, the first and second latent heat storage materials The phase state is detected by the detection means,
When it is detected that at least a part of the first latent heat storage material is in a solid state, the first latent heat is provided by a heating unit provided in proximity to the container that houses the first latent heat storage material. A first control mode that starts heating the heat storage material and terminates the heating to the first latent heat storage material when it is detected that all of the heated first latent heat storage material is in a liquid phase; and ,
When it is detected that at least a part of the second latent heat storage material is in a liquid phase state, the second latent heat is provided by a cooling unit provided close to the container that houses the second latent heat storage material. The cooling of the heat storage material is started, and when it is detected that all of the cooled second latent heat storage material is in the solid phase state, the second control mode for ending the cooling of the second latent heat storage material is performed. The heat storage method to the latent heat storage material characterized by the above-mentioned. In the heat storage method to the latent heat storage material according to claim 1,
The aforementioned detection means, a plurality of sensors are provided for measuring the degree of change of said first and internal pressure variation or the respective receptacle of the second phase change material were housed respectively each container,
In the first control mode, the heating to the first latent heat storage material is terminated when it is detected from all the measurement results of the sensor that all of the heated first latent heat storage material is in a liquid phase state. While
In the second control mode, the cooling to the second latent heat storage material is finished when it is detected from all the measurement results of the sensor that all of the cooled second latent heat storage material is in a solid state. A method for storing heat in a latent heat storage material. In the heat storage method to the latent heat storage material according to claim 1 or 2,
Each of the first and second latent heat storage materials includes an elastic material, while each of the containers is configured to be deformable,
When the container is pressed from the outside with a constant external force, the detection means determines the phase state of the first and second latent heat storage materials from the result of measuring the degree of deformation of the container according to the pressing. A method for storing heat in a latent heat storage material, characterized in that each is detected. In the heat storage method to the latent heat storage material according to claim 1 or 2,
The said detection means detects the phase state of the said 1st and 2nd latent heat storage material from the result of having measured the atmospheric pressure inside the said container, respectively, The heat storage method to the latent heat storage material characterized by the above-mentioned. In the heat storage method to the latent heat storage material described in any one of Claims 1-4,
While performing the first control mode in winter,
A method for storing heat in a latent heat storage material, wherein the second control mode is performed in summer. A method for controlling a room temperature of a house provided with a cooling device for cooling a room using the second latent heat storage material stored by the heat storage method for the latent heat storage material according to claim 1,
A method for controlling room temperature using a latent heat storage material, wherein all of the second latent heat storage material is previously in a solid phase before starting the operation of the cooling device. A method for controlling a room temperature of a house provided with a heating device for heating a room using the first latent heat storage material stored by the heat storage method for the latent heat storage material according to claim 1,
A room temperature control method using a latent heat storage material, wherein all of the first latent heat storage material is in a liquid phase state before starting the operation of the heating device. Using the first and second latent heat storage materials stored by the method for storing heat to the latent heat storage material according to claim 1, the indoor temperature of a house provided with an air conditioner for performing a cooling operation and a heating operation is controlled. A way to
An indoor temperature control method using a latent heat storage material, wherein the first control mode is performed when the air conditioner is in a heating operation, and the second control mode is performed when the air conditioner is in a cooling operation. .

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