Insulation performance estimation device and program

Abstract

To allow for more easily estimating heat insulation performance of a building while minimizing the burden on residents.SOLUTION: A heat insulation performance estimation device 1 provided herein is configured to generate data indicative of insulation performance of a building 3 under inspection on the basis of a rate of change in difference between temperature in a room with a heating appliance within the building 3 under inspection and atmospheric temperature during a given time period Ts from the time the heating appliance is turned off.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an insulation performance estimation device and program, and more particularly to an insulation performance estimation device that estimates the insulation performance of a building based on a measured temperature, for example. [Background technology]

[0002] In recent years, it has become increasingly recognized that the thermal insulation performance of buildings not only affects energy consumption, but also the onset of cardiovascular diseases, such as heat shock. In order to reduce the risk of developing cardiovascular diseases in the future, it is preferable to improve the thermal environment of homes. In order to promote the circulation and renovation of existing homes, it is necessary to evaluate the thermal insulation performance of the target homes.

[0003] The heat loss coefficient (hereinafter referred to as "Q value") is known as an index that expresses the insulation performance of a building. Generally, for newly built homes, the Q value is calculated based on the insulation specifications in the design drawings. However, for existing homes, design drawings are often not available, and the actual insulation performance is often unknown due to factors such as the construction method and deterioration over time. For this reason, a conventional method is to measure the room temperature of an existing home and estimate the Q value of the home based on the measured values.

[0004] For example, Patent Document 1 discloses a method of calculating the Q value of a building by installing temperature measuring devices in multiple rooms in a house and outside the house to measure the temperature in each room and the outside air temperature for a certain period of time, determining the average temperature of the entire building based on the measured temperatures and calculating the average temperature of rooms in contact with the outside of the building, and using a heat transfer model in which these two average temperatures have a certain relationship. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-221772 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the insulation performance estimation method disclosed in Patent Document 1 requires the installation of multiple temperature measuring devices in the target house and measuring the temperature for a certain period of time, which places restrictions and obstacles on the daily lives of the residents and places a heavy burden on the residents. In addition, the estimation method in Patent Document 1 aims to estimate the Q value more accurately, so it requires the use of a complex calculation formula.

[0007] The present invention has been made in consideration of the above-mentioned problems, and has an object to make it possible to more easily estimate the thermal insulation performance of a building while reducing the burden on occupants. [Means for solving the problem]

[0008] An insulation performance estimation device according to a representative embodiment of the present invention is characterized in that it generates data indicating the insulation performance of a building being inspected based on the rate of change of the difference between the temperature in a room in which a heating appliance is installed and the air temperature from the time the heating appliance is turned off until a predetermined time has elapsed. Effect of the Invention

[0009] According to the insulation performance estimation device of the present invention, it is possible to estimate the insulation performance of a building more simply while reducing the burden on the occupants. [Brief description of the drawings]

[0010] [Figure 1] FIG. 13 is a diagram for explaining a method of measuring temperature for estimating the thermal insulation performance of a building. [Diagram 2] FIG. 1 is a diagram showing the relationship between an estimated Q value calculated from a temperature drop rate R and a Q value calculated from design drawings, etc. [Diagram 3] FIG. 13 is a diagram showing the relationship between an estimated Q value calculated based on a temperature drop rate R of one room (the living room) and an estimated Q value calculated based on a temperature drop rate R of each room. [Figure 4]1 is a diagram showing a configuration of a system including an insulation performance estimation device according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a diagram showing a functional block configuration of the insulation performance estimation device according to the present embodiment. [Figure 6] 1 is a diagram showing a hardware configuration of an insulation performance estimation device according to an embodiment of the present invention. [Figure 7] FIG. 11 is a diagram showing an example of a correspondence relationship between a temperature drop rate and a grade of thermal insulation performance. [Figure 8] FIG. 11 is a diagram showing an example of information regarding thermal insulation performance displayed on the screen of a display device. [Figure 9] FIG. 2 is a flow chart showing a process flow for estimating insulation performance by the insulation performance estimation device according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] 1. Overview of the embodiment First, a typical embodiment of the invention disclosed in this application will be outlined. In the following description, as an example, reference numerals in the drawings corresponding to components of the invention are given in parentheses.

[0012] [1] An insulation performance estimation device (1) according to a representative embodiment of the present invention is characterized in that it generates data indicating the insulation performance of a building (3) to be inspected, based on the rate of change of the difference between the room temperature and the air temperature in a room in which a heating appliance is installed, from the time the heating appliance is turned off until a predetermined time (ts) has elapsed.

[0013] [2] The insulation performance estimation device (1) described in [1] above may have a data acquisition unit (10) that acquires data on the room temperature (40) and data on air temperature (41) around the building to be inspected, a change rate calculation unit (11) that calculates, based on the data acquired by the data acquisition unit, a first value (Tr1-Ta1) representing a difference between the room temperature (Tr1) when the heating appliance is stopped and the air temperature (Ta1) around the building to be inspected at that time, and a second value (Trn-Tan) representing a difference between the room temperature (Trn) when the predetermined time has elapsed since the heating appliance was stopped and the air temperature (Tan) around the building to be inspected at that time, and calculates the change rate based on the ratio between the first value and the second value, an estimation unit (12) that estimates the insulation performance of the building to be inspected based on the change rate, and an output unit (13) that outputs an estimation result (22) of the insulation performance by the estimation unit.

[0014] [3] In the insulation performance estimation device (1) described in [2] above, the change rate calculation unit may calculate the ratio of the second value to the first value (=(Trn-Tan) / (Tr1-Ta1)) as the change rate.

[0015] [4] In the insulation performance estimation device (1) described in [2] or [3] above, the estimation unit may select one class corresponding to the rate of change calculated by the rate of change calculation unit from a plurality of classes representing the insulation performance of a building, which are set in advance, and output the class as an estimation result of the insulation performance.

[0016] [5] In the insulation performance estimation device (1) described in [4] above, the output unit may display information (400) representing a change over time in the rate of change on a screen of a display device.

[0017] [6] In the insulation performance estimation device (1) described in [5] above, the output unit may display information (405) on the screen that represents a change over time in the rate of change of a building other than the building being inspected.

[0018] [7] In the insulation performance estimation device described in [5] or [6] above, the output unit may display a two-dimensional space on the screen represented by two coordinates, the rate of change and time, and may display an area (402) for each class in the two-dimensional space, as well as a symbol (403) indicating the size of each class.

[0019] [8] A program according to a representative embodiment of the present invention causes a computer to generate data indicating the insulation performance of a building under inspection based on the rate of change of the difference between the temperature of a room and the air temperature in the room in which the heating appliance is installed, from when the heating appliance is turned off until a predetermined time has elapsed.

[0020] [9] In the program described in [8] above, the computer may be caused to execute a first step (S1) of acquiring data on the room temperature and data on the ambient temperature of the building to be inspected, a second step (S2) of calculating, based on the data acquired by the first step, a first value representing the difference between the room temperature when the heating appliance is stopped and the ambient temperature of the building to be inspected at that time, and a second value representing the difference between the room temperature when the specified time has elapsed since the heating appliance was stopped and the ambient temperature of the building to be inspected at that time, and calculating the rate of change based on the ratio between the first value and the second value, a third step (S3) of estimating the insulation performance of the building to be inspected based on the rate of change, and a fourth step (S4) of outputting the estimation result of the insulation performance obtained by the third step.

[0021] 2. Specific examples of embodiments Hereinafter, specific examples of the embodiments of the present invention will be described with reference to the drawings. Note that in the following description, the drawings are schematic, and the dimensional relationships between elements, the ratios between elements, etc. may differ from the actual ones.

[0022] <Outline of insulation performance estimation method> Prior to the invention, the inventors of the present application conducted the following experiment and obtained new knowledge that it is possible to simply estimate the thermal insulation performance from the rate of change of the difference between the temperature of one room in a building and the air temperature. This will be described in detail below.

[0023] FIG. 1 is a diagram for explaining a method of measuring temperature for estimating the thermal insulation performance of a building. 1, the horizontal axis represents time, and the vertical axis represents temperature (°C). Reference symbol 300 represents the change in temperature over time in one room (the living room), reference symbol 301 represents the change in temperature over time in the entrance, reference symbol 302 represents the change in temperature over time in the bedroom, and reference symbol 303 represents the change in temperature outside the building (outside temperature) over time.

[0024] In the experiment, a specified temperature was measured at least twice per household during the winter season (from November to early March), and the heat loss coefficient (Q value) was estimated from the measurement results.

[0025] Specifically, as shown in Fig. 1, in one room (living room) in a building where a heating appliance (air conditioner) is installed, the heating appliance is turned on at time t0, and the room temperature (about 22°C) is maintained for a certain period of time (4 hours or more), and then the heating appliance is stopped at time t1 (e.g., midnight). After that, the heating appliance is kept stopped for a certain period of time ts (about 6 hours), and during that period, the temperatures of the living room, entrance, and bedroom (hereinafter referred to as "each room") and the temperature outside the building (outside temperature) are measured every unit of time t. The Q value is then estimated from the rate of change of the difference between the temperature of each room and the air temperature from when the heating appliance is stopped to when the measurement is completed (6 a.m.).

[0026] Here, the rate of change of the difference between the temperature of each room and the air temperature is a value based on the ratio between the difference (first value) between the room temperature Tr1 when the heating appliance is turned off and the air temperature Ta1 around the building being inspected at that time, and the difference (second value) between the room temperature Trn when a predetermined time ts has elapsed since the heating appliance is turned off and the air temperature Tan around the building being inspected at that time.

[0027] In the above experiment, the rate of change R of the difference between the room temperature and the air temperature was determined as the ratio of the second value to the first value using the following formula (1). Hereinafter, this rate of change R is also referred to as the "temperature drop rate R."

[0028]

number

[0029] In the above experiment, the temperature drop rate R of each room during the period ts from midnight to 6 am when the heating appliances were turned off was calculated, and the Q value (estimated Q value) was calculated from the temperature drop rate R using a specified relational equation.

[0030] Fig. 2 is a diagram showing the relationship between the estimated Q value calculated from the temperature drop rate R of each room and the Q value calculated from design drawings, etc. The horizontal axis of Fig. 2 represents the Q value calculated based on the insulation specifications of the building's design documents (design Q value), and the horizontal axis represents the Q value calculated from the temperature drop rate obtained by the above experiment (estimated Q value). Fig. 2 shows an example of the correspondence relationship between the estimated Q value and the design Q value for each building.

[0031] As shown in Figure 2, the estimated Q value calculated based on the temperature drop rate R of each room does not completely match the design Q value, but in approximately 80% of the buildings, the difference between the estimated Q value and the design Q value was less than 1.0.

[0032] FIG. 3 is a diagram showing the relationship between the estimated Q value calculated based on the temperature drop rate R of one room (the living room) and the estimated Q value calculated based on the temperature drop rate R of each room. The horizontal axis of Fig. 3 represents the estimated Q value calculated based on the temperature drop rate R of one room (the living room), and the horizontal axis represents the estimated Q value calculated for each room based on the temperature drop rate R. Fig. 3 shows an example of the correspondence relationship between the estimated Q value in the living room and the estimated Q value for each room.

[0033] As shown in Figure 3, the correspondence between the estimated Q value for one room (the living room) and the estimated Q value for each room does not match perfectly, but there is about 80% correlation overall.

[0034] From the above experimental results, the inventors have found that it is possible to easily estimate the thermal insulation performance of a building from the rate of change of the difference between the temperature of one room and the air temperature, without measuring the temperatures of multiple rooms in the building. Based on this finding, the inventors have completed a new thermal insulation performance estimation device. Hereinafter, an insulation performance estimation device according to an embodiment of the present invention will be described.

[0035] <Insulation performance estimation device> FIG. 4 is a diagram showing a configuration of a system 6 including an insulation performance estimation device 1 according to an embodiment of the present invention.

[0036] The insulation performance estimation device 1 shown in the figure is a device for estimating the insulation performance of a building to be inspected based on the results of measuring the temperature in the building to be inspected.

[0037] 4, the insulation performance estimation device 1 is configured to be connectable to a network 5, and is capable of communicating with a temperature data management device 4 and a communication device 30 installed in a building 3 via the network 5. In this embodiment, a case where the building 3 is a "residence" will be described as an example, but the present invention is not limited to this.

[0038] The network 5 is, for example, a wide area network (WAN) such as the Internet. The insulation performance estimation device 1 is configured to be connectable to the network 5 via wired or wireless communication.

[0039] Thermometers 31 and 32 and a communication device 30 are provided in the building 3 to be inspected. Thermometer 31 is provided in one of the rooms in building 3 in which a heating appliance (eg, an air conditioner) is installed, and measures the temperature (room temperature) of the room, for example, every unit time t.

[0040] Here, the room in which the thermometer 31 is installed is not particularly limited as long as it is a room in which a heating appliance is installed, but in order to reduce restrictions on the occupants' daily lives when the temperature is measured and to more accurately calculate the temperature drop rate of the building, it is preferable that the room be a living room or the like where there is little traffic when the temperature is measured (for example, at night).

[0041] The thermometer 32 measures the temperature around the building 3. The thermometer 32 is provided outside the building 3, and measures the air temperature (outdoor air temperature) for example, every unit time t.

[0042] When estimating the thermal insulation performance of a building 3 by the thermal insulation performance estimation device 1 according to this embodiment, the temperature in the building 3 is measured in advance by a method similar to that shown in FIG.

[0043] Specifically, first, a heating appliance (e.g., an air conditioner) installed in a room (e.g., a living room) in which thermometer 31 of building 3 is installed is turned on, and thermometers 31, 32 start measuring the room temperature and air temperature every unit time. After that, the heating appliance is operated for a certain period of time (4 hours or more) to stabilize the room temperature. After the room temperature has stabilized, the heating appliance is stopped at a predetermined time (e.g., midnight) and the stopped state of the heating appliance is maintained for a predetermined time ts (e.g., 6 hours) while continuing to measure the room temperature and air temperature. Then, after the predetermined time ts has elapsed, measurement of the room temperature and air temperature by thermometers 31, 32 is stopped. The temperature need not be measured every unit time, but may be measured only when the heating appliance is stopped and after a predetermined time ts has elapsed.

[0044] The room temperature and air temperature measurement results thus measured are transmitted from the thermometers 31 and 32 to the communication device 30. The thermometers 31 and 32 and the communication device 30 are capable of transmitting and receiving data to each other by a known wireless communication method such as wireless LAN or Bluetooth (registered trademark). For example, the thermometers 31 and 32 transmit the temperature measurement results for each unit time t to the communication device 30.

[0045] The communication device 30 communicates with the thermometers 31 and 32. The communication device 30 can be connected to the network 5 by wired or wireless communication, and can communicate with the outside via the network 5. The communication device 30 is installed within the premises of the building 3 (for example, inside a room).

[0046] As described above, the communication device 30 receives the room temperature measurement result from the thermometer 31, and receives the air temperature measurement result from the thermometer 32. The communication device 30 stores the received room temperature and air temperature measurement results in a storage device (not shown) provided inside the communication device 30. For example, in response to a request from the temperature data management device 4, the communication device 30 transmits the room temperature and air temperature measurement results of the building 3 stored in the storage device within the communication device 30.

[0047] Note that, while Figure 4 illustrates an example in which one building 3 is connected to the network 5, this is not limited to this, and multiple buildings 3 in which thermometers 31, 32 and communication devices 30 are installed may be connected to the network 5.

[0048] The temperature data management device 4 is a device that manages the measurement results of the room temperature and the air temperature in the building 3. The temperature data management device 4 is an information processing device (computer) capable of two-way communication with the outside via the network 5, and is, for example, a server.

[0049] The temperature data management device 4 acquires the room temperature and air temperature measurement results per unit time measured by thermometers 31, 32 installed in the building 3 from a communication device 30 installed in the building 3 to be inspected via a network 5, and stores them as room temperature data 40 and air temperature data 41. For example, when multiple buildings 3 (communication devices 30) are connected to the network 5, the room temperature data 40 and air temperature data 41 are acquired for each building 3 and managed.

[0050] When estimating the insulation performance of the building 3 using the insulation performance estimation device 1, it is not essential that the room temperature data 40 and the air temperature data 41 are managed by the temperature data management device 4. For example, the room temperature data 40 and the air temperature data 41 stored in the communication device 30 of the building 3 may be copied to a storage medium such as a memory card, and when estimating the insulation performance of the building 3 to be inspected, the insulation performance estimation device 1 may read the room temperature data 40 and the air temperature data 41 from the storage medium.

[0051] Next, a specific configuration of the insulation performance estimation device 1 will be described. The insulation performance estimation device 1 generates data indicating the insulation performance of the building 3 being inspected based on the rate of change of the difference between the room temperature and the air temperature in a room in which a heating appliance is installed in the building 3 being inspected, from when the heating appliance is turned off until a specified time has elapsed.

[0052] FIG. 5 is a diagram showing a functional block configuration of the insulation performance estimation device 1 according to this embodiment. FIG. 6 is a diagram showing a hardware configuration of the insulation performance estimation device 1 according to this embodiment.

[0053] The insulation performance estimation device 1 is realized by an information processing device (computer) such as a server, a personal computer (PC), a tablet terminal, etc., and is a device that estimates the insulation performance of a building 3 to be inspected by performing various calculations according to an installed program.

[0054] As shown in Fig. 5, the insulation performance estimation device 1 has, as functional units for estimating the insulation performance of the building 3 to be inspected, a data acquisition unit 10, a change rate calculation unit 11, an estimation unit 12, an output unit 13, and a storage unit 14. These functional blocks are realized by the hardware resources shown in Fig. 6 constituting an information processing device as the insulation performance estimation device 1, working together with software (various programs including a program for estimating insulation performance) installed in the information processing device.

[0055] As shown in FIG. 6, the insulation performance estimation device 1 includes, as hardware resources, a calculation device 101, a storage device 102, an input device 103, an I / F (Interface) device 104, an output device 105, and a bus 106, for example.

[0056] The arithmetic device 101 is composed of processors such as a CPU (Central Processing Unit) and a DSP (Digital Signal Processor). The storage device 102 has a storage area for storing programs 1021 for causing the arithmetic device 101 to execute various data processing operations, and data 1022 such as parameters and calculation results used in the data processing by the arithmetic device 101, and is composed of, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), a HDD, and a flash memory.

[0057] The program 1021 stored in the storage device 102 includes an insulation performance estimation program that causes a computer to function as the insulation performance estimation device 1, and is pre-installed in the storage device 102, for example.

[0058] The data 1022 stored in the storage device 102 includes various data such as temperature data 42, data 20 on the temperature drop rate R, correspondence relationship information 21, and insulation performance estimation results 22, which will be described later.

[0059] The program 1021 and the data 1022 may be distributed via a network, or may be written to a non-transitory computer readable medium such as a CD-ROM or a memory card and distributed.

[0060] The input device 103 is a device that detects input of information from the outside, and examples of such devices include a keyboard, a mouse, a pointing device, a button, a touch panel, etc. The I / F device 104 is a device that transmits and receives data to and from the outside, and is composed of, for example, a communication control circuit, an input / output port, an antenna, etc. for performing wired or wireless communication.

[0061] The output device 105 is a device that outputs information obtained by data processing by the arithmetic device 101. Examples of the output device 105 include external storage devices such as SSDs and HDDs, and display devices such as LCDs (Liquid Crystal Displays) and organic EL (Electro Luminescence) displays. The bus 106 interconnects the arithmetic device 101, the storage device 102, the input device 103, the I / F device 104, and the output device 105, enabling data to be transmitted and received between these devices.

[0062] In the insulation performance estimation device 1, the calculation device 101 executes calculations in accordance with a program 1021 stored in the memory device 102, and controls the memory device 102, the input device 103, the I / F device 104, the output device 105, and the bus 106, thereby realizing each functional block of the insulation performance estimation device 1 shown in Figure 5 (data acquisition unit 10, change rate calculation unit 11, estimation unit 12, output unit 13, and memory unit 14).

[0063] Each functional block of the insulation performance estimation device 1 will be described in detail below.

[0064] The data acquisition unit 10 is a functional unit that acquires data necessary for estimating the thermal insulation performance of the inspection target building 3. The data acquisition unit 10 acquires the necessary data by transmitting and receiving data to and from external information processing devices including the temperature data management device 4 via the network 5.

[0065] The data acquiring unit 10 acquires room temperature data 40 and air temperature data 41 of the building 3 to be inspected. Specifically, the data acquiring unit 10 acquires the room temperature data 40 and air temperature data 41 of the building 3 to be inspected from the data stored in the temperature data managing device 4 by communicating with the temperature data managing device 4. The data acquiring unit 10 stores, for example, the acquired room temperature data 40 and air temperature data 41 for each unit time of the building 3 to be inspected in the storage unit 14 as temperature data 42_1 to 42_n for each unit time t.

[0066] In this specification, when there is no need to distinguish between components with suffixes added to their reference symbols, such as temperature data 42_1 to 42_n, the suffix may be omitted, such as "temperature data 42."

[0067] The room temperature data 40 and air temperature data 41 of the building 3 to be inspected are not limited to being acquired from the temperature data management device 4. For example, the room temperature data 40 and air temperature data 41 of the building 3 to be inspected may be stored in advance in a storage medium such as a memory card, and when estimating insulation performance using the insulation performance estimation device 1, the storage medium may be read into the insulation performance estimation device 1, and the data acquisition unit 10 may acquire the room temperature data 40 and air temperature data 41 from the storage medium and store them in the storage unit 14.

[0068] The storage unit 14 is a functional unit that stores various data and calculation results necessary for estimating the thermal insulation performance of a building by the thermal insulation performance estimation device 1. For example, in addition to the above-mentioned temperature data 42, the storage unit 14 stores various data such as data 20 on a temperature drop rate R, correspondence relationship information 21, and thermal insulation performance estimation results 22, which will be described later.

[0069] The change rate calculation unit 11 is a functional unit that calculates the change rate of the difference between the room temperature and the air temperature in the building 3 to be inspected based on the temperature data 42. Specifically, based on the data (temperature data 42) acquired by the data acquisition unit 10, the change rate calculation unit 11 calculates a first value representing the difference between the room temperature (Tr1) when the heating appliance is stopped and the air temperature (Ta1) around the building 3 to be inspected at that time, and a second value representing the difference between the room temperature (Trn) when a predetermined time ts has elapsed since the heating appliance was stopped and the air temperature (Tan) around the building 3 to be inspected at that time, and calculates the change rate based on the ratio between the first value (Tr1-Ta1) and the second value (Trn-Ta1).

[0070] More specifically, the change rate calculation unit 11 calculates the ratio of the second value (Trn-Ta1) to the first value (Tr1-Ta1) based on the above-mentioned formula (1), and outputs it as the temperature drop rate R.

[0071] At this time, the change rate calculation unit 11 calculates at least the temperature drop rate R (=100%) when the heating appliance is turned off (t=t1) and the temperature drop rate R when a predetermined time ts has elapsed (t=tn) after the heating appliance is turned off, and stores these in the memory unit 14 as data 20_1 of the temperature drop rate R (t=t1) and data 20_n of the temperature drop rate R (t=tn).

[0072] The change rate calculation unit 11 may calculate the temperature drop rate R for each unit time t. For example, the change rate calculation unit 11 may calculate the temperature drop rate R at each time t=t1 to tn (n is an integer of 2 or more) and store the data 20_1 to 20_n of the temperature drop rate R in the storage unit 14.

[0073] The estimation unit 12 is a functional unit that estimates the thermal insulation performance of the building 3 to be inspected based on the temperature drop rate R. The estimation unit 12 selects, for example, one class corresponding to the temperature drop rate R calculated by the change rate calculation unit 11 from a plurality of preset classes that represent the thermal insulation performance of the building, and outputs the class as an estimation result of the thermal insulation performance (thermal insulation performance estimation result 22).

[0074] 2, there is a correlation between the temperature drop rate R of the building 3 and the Q value. Therefore, the thermal insulation performance of the building is divided into a plurality of grades (divisions) based on the Q value, and correspondence relationship information 21 indicating the correspondence between each grade and the temperature drop rate R is created in advance and stored in the storage unit 14. Then, the estimation unit 12 uses the correspondence relationship information 21 stored in the storage unit 14 to determine the grade representing the thermal insulation performance from the temperature drop rate R calculated by the change rate calculation unit 11.

[0075] FIG. 7 is a diagram showing an example of the correspondence relationship between the temperature drop rate R and the grade of thermal insulation performance. In FIG. 7, the horizontal axis represents the thermal insulation performance grades 1 to 4, and the vertical axis represents the temperature drop rate R.

[0076] Thermal insulation performance grades 1 to 4 correspond to the energy conservation measures grades set by the Ministry of Land, Infrastructure, Transport and Tourism, for example. Each grade is set based on the Q value.

[0077] FIG. 7 shows a box plot illustrating the range of temperature drop rate R corresponding to each range of Q value of grades 1 to 4, derived from the correspondence relationship between the temperature drop rate R and the corresponding Q value based on the above-mentioned experimental results (see FIG. 2).

[0078] 7, correspondence relationship information 21 showing the correspondence relationship between the temperature drop rate R and the grades 1 to 4 is created in advance and stored in storage unit 14. The correspondence relationship information 21 stored in storage unit 14 may be data in a table format showing the relationship between the temperature drop rate R and the grades 1 to 4, or may be data of a function (mathematical formula) showing the relationship between the temperature drop rate R and the grades 1 to 4.

[0079] The estimation unit 12 uses the correspondence relationship information 21 as shown in FIG. 7 to select one class from the temperature drop rate R calculated by the change rate calculation unit 11, and stores it in the storage unit 14 as an insulation performance estimation result 22.

[0080] The output unit 13 is a functional unit that outputs the insulation performance estimation result by the estimation unit 12. Specifically, the output unit 13 displays, for example, information on the class indicating the insulation performance as the insulation performance estimation result 22 stored in the storage unit 14 on a display device (display) serving as the output device 105 of the insulation performance estimation device 1. In addition, the output unit 13 may output the information on the class indicating the insulation performance, information on the temperature drop rate R, and the like to an external storage, information processing device, or the like via the I / F device 104 of the insulation performance estimation device 1.

[0081] The output unit 13 may also display information representing the change over time in the temperature drop rate R of the building 3 to be inspected on the screen of the display device. In this case, the output unit 13 may display information representing the change over time in the temperature drop rate R of a building different from the building 3 to be inspected on the screen. Furthermore, the output unit 13 may display a two-dimensional space represented by two coordinates, the temperature drop rate R and time, on the screen of the display device, and display areas for each of the above grades 1 to 4 in the two-dimensional space, as well as a symbol indicating the size of each of the grades 1 to 4.

[0082] FIG. 8 is a diagram showing an example of information related to thermal insulation performance displayed on the screen of a display device. 8 shows a display screen 500 of the display device of the insulation performance estimation device 1. The display screen 500 shows a two-dimensional space with the horizontal axis representing elapsed time [h] and the vertical axis representing temperature drop rate [%], and shows a graph 400 showing the change over time of the temperature drop rate R from time t0 (= 0) to time tn (= 6) of the building 3 to be inspected, and a graph 405 showing the change over time of the temperature drop rate R from time t0 (= 0) to time tn (= 6) of a building different from the building 3 to be inspected.

[0083] Here, a building different from the building 3 to be inspected may be a building constructed in a different location from the building 3 to be inspected, or may be a building before or after the renovation of the building 3 to be inspected.

[0084] Also, on display screen 500, regions 402 of grades 1 to 4 in the two-dimensional space are displayed, and for example, a symbol (e.g., a star-shaped symbol) 403 indicating the size of the grade corresponding to the region is displayed within each region 402. For example, four stars are displayed in the region of grade 4, and one star is displayed in the region of grade 1.

[0085] In this manner, the output unit 13 may present information on the thermal insulation performance of the building to be inspected to the user by causing the display device to display a display screen 500 as shown in FIG.

[0086] Next, a process flow for estimating the insulation performance by the insulation performance estimation device 1 will be described.

[0087] FIG. 9 is a flow chart showing a process flow for estimating the insulation performance by the insulation performance estimation device 1 according to this embodiment.

[0088] 9, first, the insulation performance estimation device 1 acquires temperature data 42 of the building 3 to be inspected (step S1). For example, the insulation performance estimation device 1 accesses the temperature data management device 4, and the data acquisition unit 10 acquires the room temperature data 40 and air temperature data 41 of the building 3 to be inspected that are stored in the temperature data management device 4, and stores them as temperature data 42 in the storage unit 14. Alternatively, the insulation performance estimation device 1 may access a storage medium such as a memory card, and the data acquisition unit 10 may read the room temperature data 40 and air temperature data 41 of the building 3 to be inspected from the storage medium.

[0089] Next, the insulation performance estimation device 1 calculates the temperature drop rate R (step S2). Specifically, first, the change rate calculation unit 11 obtains the measured values ​​of the room temperature (Tr1) and the air temperature (Ta1) at the time t0 when the heating appliance is stopped, and the measured values ​​of the room temperature (Trn) and the air temperature (Tan) at the time tn when a predetermined time has elapsed since the heating appliance was stopped, from the room temperature data 40 and the air temperature data 41 of the building 3 to be inspected obtained in step S1. Next, the change rate calculation unit 11 calculates the temperature drop rate R(t=tn) by substituting the obtained measured values ​​into the above formula (1). At this time, the change rate calculation unit 11 may calculate the temperature drop rates R(t=t0) to R(t=n) for each unit time t from the times t1 to tn.

[0090] Next, the insulation performance estimation device 1 estimates the insulation performance of the building 3 to be inspected based on the temperature drop rate R calculated in step S2 (step S3). Specifically, the estimation unit 12 selects a class corresponding to the temperature drop rate R calculated in step S2 using correspondence relationship information 21 between the temperature drop rate R and insulation performance classes 1 to 4 stored in advance in the storage unit 14, and sets the class as an insulation performance estimation result 22.

[0091] Next, the insulation performance estimation device 1 outputs the insulation performance estimation result 22 estimated in step S3 (step S4). Specifically, the output unit 13 causes the display device to display information on the insulation performance class as the insulation performance estimation result 22. Furthermore, when the temperature drop rates R(t=t0) to R(t=n) for each unit time t from time t1 to tn are calculated, the output unit 13 may display a graph 400 indicating the change over time in the temperature drop rate R, as in the display screen 500 of Fig. 8. Furthermore, as in the display screen 500, the ranges (areas 402) of each grade of thermal insulation performance defined by boundary lines and star-shaped symbols 403 representing each grade may be displayed on a single screen together with the graph 400.

[0092] As described above, the insulation performance estimation device 1 of this embodiment generates data indicating the insulation performance of the building 3 to be inspected, based on the rate of change of the difference between the room temperature and the air temperature in a room in which a heating appliance is installed in the building 3 to be inspected, from the time the heating appliance is turned off until a predetermined time has elapsed.

[0093] Specifically, the insulation performance estimation device 1 calculates the rate of change based on a ratio between a first value (Tr1-Ta1) representing the difference between the temperature (Tr1) of one room when the heating appliance is stopped and the ambient temperature (Ta1) of the inspection target building 3 at that time, and a second value (Trn-Tan) representing the difference between the temperature (Trn) of the room when a predetermined time ts has elapsed since the heating appliance was stopped and the ambient temperature Tan of the inspection target building 3 at that time, and estimates the insulation performance of the inspection target building 3 based on the rate of change. More specifically, the ratio of the second value to the first value (temperature drop rate R) is calculated as the rate of change.

[0094] 2, there is a correlation between the temperature drop rate R calculated by the above-mentioned method and the thermal insulation performance (Q value). Therefore, by calculating the temperature drop rate R of the building 3 to be inspected as in the thermal insulation performance estimation device 1, it becomes possible to estimate the thermal insulation performance.

[0095] To calculate the temperature drop rate R of the building under test, it is sufficient to measure the room temperature and temperature of one room where a heating appliance is installed, and there is no need to measure the temperatures of multiple rooms in the building. In addition, no complex calculations are required to calculate the temperature drop rate R.

[0096] In this way, the insulation performance estimation device 1 according to the present embodiment makes it possible to more easily estimate the insulation performance of a building while reducing the burden on the occupants.

[0097] In addition, by using the rate of change of temperature (temperature drop rate R) rather than the temperature itself as an index for estimating insulation performance, it is possible to evaluate insulation performance on a common scale even if the temperature at the start of measurement differs depending on the measurement environment, etc., which makes it easy to compare the insulation performance with other homes and before and after renovation, as will be described later.

[0098] Moreover, the insulation performance estimation device 1 selects one class corresponding to the calculated temperature drop rate R from among a plurality of preset classes representing the insulation performance of a building, and outputs the class as an insulation performance estimation result 22. This makes it possible for residents and others to intuitively understand the insulation performance of the building, compared to when accurate, detailed numerical values ​​such as the heat loss coefficient (Q value) are output as insulation performance estimates.

[0099] Furthermore, the insulation performance estimation device 1 displays information (graph 400) showing the change over time in the temperature drop rate R on the screen of the display device. This makes it possible to present the state in which the temperature drop rate in the building under inspection decreases, thereby enabling residents and the like to more intuitively understand the insulation performance of the building under inspection.

[0100] The insulation performance estimation device 1 further displays information (graph 405) showing the change over time in the temperature drop rate R of buildings other than the building being inspected. This makes it possible to simultaneously display the change in the temperature drop rate R of the building being inspected and the other buildings on one screen, making it easy for residents to compare the insulation performance with other houses or compare the insulation performance before and after renovation.

[0101] Furthermore, the insulation performance estimation device 1 displays a two-dimensional space represented by two coordinates, the temperature drop rate R and time, on the screen of the display device, and also displays areas 402 for each class in the two-dimensional space, and displays symbols 403 indicating the size of each class. This allows a graph 400 showing the change over time in the temperature drop rate of the building 3 being inspected and the insulation performance grade of the building 3 to be displayed on a single screen, enabling residents and others to more intuitively understand the insulation performance of the building.

[0102] <<Extension of the embodiment>> The invention made by the present inventors has been specifically described above based on an embodiment, but it goes without saying that the invention is not limited thereto and can be modified in various ways without departing from the spirit of the invention.

[0103] For example, in the above embodiment, the case where the temperature data 41 measured by the thermometer 32 installed outside the building 3 to be inspected is used has been exemplified, but this is not limiting. For example, information on the daily average temperature in the area in which the building 3 to be inspected is located (e.g., mesh data) may be acquired from an external server or the like connected to the network 5 and used as the temperature data 41. Here, the external server is a server that provides various weather data, for example, a server of the Japan Meteorological Agency. This eliminates the need to install a thermometer 32 outside the building 3, thereby further reducing the burden on residents.

[0104] In the above embodiment, the case where various information such as the insulation performance estimation result 22 is displayed on the display device included in the insulation performance estimation device 1 has been exemplified, but the device that executes the data processing for insulation performance estimation and the device that displays the estimation result may be configured separately. For example, when an instruction to execute data processing for insulation performance estimation is given from a user terminal (e.g., a PC or a tablet terminal) to a server and the server executes data processing for insulation performance estimation, the server may transmit the insulation performance estimation result 22 etc. to the user terminal, and the insulation performance estimation result 22 etc. received by the user terminal from the server may be displayed on the display device of the user terminal.

[0105] In addition, the above-mentioned flowchart shows an example for explaining the operation, and is not limited to this. That is, the steps shown in each figure of the flowchart are specific examples, and are not limited to this flow. For example, other processes may be inserted between each process. [Explanation of symbols]

[0106] 1...insulation performance estimation device, 3...building, 4...temperature data management device, 5...network, 30...communication device, 31, 32...thermometer, 40...room temperature data, 41...air temperature data, 10...data acquisition unit, 11...change rate calculation unit, 12...estimation unit, 13...output unit, 14...memory unit, 20_1 to 20_n...temperature drop rate, 21...correspondence information, 22...insulation performance estimation result, 101...computation device, 102...memory device, 103...input device, 104...I / F device, 105...output device, 106...bus, 1021...program (program for generating trained model), 1022, 1024...data, 1023...program (program for estimating insulation performance).

Claims

1. 1. An insulation performance estimation device that generates data indicating the insulation performance of a building to be inspected based on a rate of change of a difference between a room temperature and an air temperature in a room in which a heating appliance is installed, from when the heating appliance is stopped until a predetermined time has elapsed, the device comprising: A data acquisition unit that acquires data on the room temperature and data on the ambient temperature of the building to be inspected; a change rate calculation unit that calculates, based on the data acquired by the data acquisition unit, a first value representing a difference between the temperature of the room when the heating appliance is stopped and the ambient air temperature of the building to be inspected at that time, and a second value representing a difference between the temperature of the room when the predetermined time has elapsed since the heating appliance was stopped and the ambient air temperature of the building to be inspected at that time, and calculates the ratio between the first value and the second value as the change rate; an estimation unit that estimates the thermal insulation performance of the building to be inspected based on the rate of change; An output unit that outputs an estimation result of the thermal insulation performance by the estimation unit, The change rate calculation unit calculates the change rate for each unit time after the heating appliance is stopped, the estimation unit uses correspondence information indicating a correspondence relationship between the rate of change and a class indicating the thermal insulation performance of the building to select, from among a plurality of classes, one class corresponding to the rate of change calculated by the rate of change calculation unit, and outputs the class as an estimation result of the thermal insulation performance; The output unit displays information representing a change in the rate of change over time on a screen of a display device. Insulation performance estimation device.

2. The insulation performance estimation device according to claim 1, The change rate calculation unit calculates a ratio of the second value to the first value as the change rate. Insulation performance estimation device.

3. The insulation performance estimation device according to claim 1 or 2, The output unit displays on the screen information representing a temporal change in the rate of change of a building different from the building to be inspected. Insulation performance estimation device.

4. The insulation performance estimation device according to any one of claims 1 to 3, The output unit displays a two-dimensional space represented by two coordinates, the rate of change and time, on the screen, displays an area for each grade in the two-dimensional space, and displays a symbol indicating the size of each grade. Insulation performance estimation device.

5. Computer, A program that generates data indicating the thermal insulation performance of a building to be inspected based on a rate of change between the temperature of a room and the air temperature in the room in which the heating appliance is installed, from when the heating appliance is stopped until a predetermined time has elapsed, the program comprising: a first step of acquiring data on the room temperature and data on the ambient temperature of the building to be inspected; a second step of calculating, based on the data acquired in the first step, a first value representing a difference between the temperature of the room when the heating appliance is stopped and the ambient air temperature of the building to be inspected at that time, and a second value representing a difference between the temperature of the room when the predetermined time has elapsed since the heating appliance was stopped and the ambient air temperature of the building to be inspected at that time, and calculating the ratio between the first value and the second value as the rate of change; A third step of estimating the thermal insulation performance of the building to be inspected based on the rate of change; A fourth step of outputting the result of the estimation of the thermal insulation performance by the third step; a fifth step of displaying information representing a change in the rate of change over time on a screen of a display device; The second step includes a step of calculating the rate of change for each unit time after the heating appliance is stopped, The third step includes a step of selecting one of the classes corresponding to the rate of change calculated in the second step from among the classes, using correspondence information indicating a correspondence relationship between the rate of change and a class indicating the thermal insulation performance of a building, and outputting the class as an estimated result of the thermal insulation performance. program.

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