JP7630765B2 - Insulation performance estimation device and program - Google Patents

Description

The present invention relates to an insulation performance estimation device and program, for example, to an insulation performance estimation device that estimates the insulation performance of a building based on measured temperature.

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

The heat loss coefficient (hereafter referred to as "Q value") is known as an index of a building's insulation performance. 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 method has been known in the past to measure the room temperature of an existing home and estimate the Q value of that home based on the measured values.

For example, Patent Document 1 discloses a method of 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 calculating the Q value of the building using a heat transfer model in which these two average temperatures have a certain relationship.

JP 2013-221772 A

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 hindrances on the daily lives of the residents and places a heavy burden on them. 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.

The present invention was made in consideration of the above-mentioned problems, and aims to make it easier to estimate the insulation performance of a building while minimizing the burden on residents.

The 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 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 when the heating appliance is turned off until a predetermined time has elapsed in the building to be inspected.

The insulation performance estimation device of the present invention makes it possible to estimate the insulation performance of a building more easily while minimizing the burden on residents.

FIG. 13 is a diagram for explaining a method of measuring temperature for estimating the thermal insulation performance of a building. FIG. 11 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. 11 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. FIG. 1 is a diagram showing a configuration of a system including an insulation performance estimation device according to an embodiment of the present invention. FIG. 2 is a diagram showing a functional block configuration of the insulation performance estimation device according to the present embodiment. 1 is a diagram showing a hardware configuration of an insulation performance estimation device according to an embodiment of the present invention. FIG. 11 is a diagram showing an example of a correspondence relationship between a temperature drop rate and a grade of thermal insulation performance. FIG. 11 is a diagram showing an example of information regarding thermal insulation performance displayed on the screen of a display device. 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.

1. Overview of the embodiment First, an overview of a representative embodiment of the invention disclosed in this application will be described. Note that in the following description, as an example, reference numerals in the drawings corresponding to components of the invention are given in parentheses.

[1] The 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 when the heating appliance is turned off until a predetermined time (ts) has elapsed.

[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 the ambient temperature (41) of the building to be inspected, a change rate calculation unit (11) that calculates a first value (Tr1-Ta1) representing the difference between the room temperature (Tr1) when the heating appliance is stopped and the ambient temperature (Ta1) of the building to be inspected at that time based on the data acquired by the data acquisition unit, and a second value (Trn-Tan) representing the difference between the room temperature (Trn) when the predetermined time has elapsed since the heating appliance was stopped and the ambient temperature (Tan) of 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 the insulation performance estimation result (22) by the estimation unit.

[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.

[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 among a plurality of classes that represent the insulation performance of a building, which are set in advance, and output the class as an estimation result of the insulation performance.

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

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

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

[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 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 when the heating appliance is turned off until a predetermined time has elapsed.

[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 in 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 predetermined time has elapsed since the heating appliance is 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 result of estimating the insulation performance obtained in the third step.

2. Specific examples of embodiments of the present invention will be described below 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.

<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.

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.

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.

Specifically, as shown in Figure 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 (approximately 22°C) is maintained for a certain period of time (4 hours or more), after which the heating appliance is stopped at time t1 (e.g., midnight). The heating appliance is then kept stopped for a certain period of time ts (approximately 6 hours), and during that period, the temperatures of the living room, entrance, and bedroom (hereinafter referred to as "each room") and the air temperature outside the building (outside air 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 in each room and the air temperature from when the heating appliance is stopped to when the measurements are completed (6:00 a.m.).

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 was turned off and the air temperature Tan around the building being inspected at that time.

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

In the above experiment, the temperature drop rate R of each room during the period ts from midnight to 6:00 a.m. 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.

Figure 2 shows 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 Figure 2 represents the Q value calculated based on the insulation specifications in the building's design documents (design Q value), while the horizontal axis represents the Q value calculated from the temperature drop rate obtained by the above experiment (estimated Q value). Figure 2 shows an example of the correspondence between the estimated Q value and the design Q value for each building.

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 buildings, the difference between the estimated Q value and the design Q value was less than 1.0.

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.

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.

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.

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

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 temperature measurement results in the building to be inspected.

As shown in FIG. 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, the case where the building 3 is a "residence" is described as an example, but is not limited to this.

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.

The building 3 to be inspected is equipped with thermometers 31 and 32 and a communication device 30 .
Thermometer 31 is provided in one of the rooms in building 3 in which a heating appliance (e.g., an air conditioner) is installed, and measures the temperature (room temperature) of the room, for example, every unit time t.

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 measuring the temperature and to more accurately calculate the temperature drop rate of the building, it is preferable to install the thermometer 31 in a room such as a living room where there is little traffic when measuring the temperature (e.g. at night).

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

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

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 (four 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., six 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.

The room temperature and air temperature measurement results thus obtained 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 using 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.

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 (e.g., inside a room).

As described above, the communication device 30 receives the room temperature measurement results from the thermometer 31 and receives the air temperature measurement results 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.

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

The temperature data management device 4 is a device that manages the measurement results of the room temperature and 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.

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 and managed for each building 3.

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 the insulation performance estimation device 1 may read the room temperature data 40 and the air temperature data 41 from the storage medium when estimating the insulation performance of the building 3 to be inspected.

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 within the building 3 being inspected, from the time the heating appliance is turned off until a specified time has elapsed.

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.

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 the building 3 to be inspected by performing various calculations according to an installed program.

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

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.

The arithmetic device 101 is composed of a processor such as a CPU (Central Processing Unit) or 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.

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, for example, pre-installed in the storage device 102.

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 information 21, and insulation performance estimation results 22, which will be described later.

The program 1021 and 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.

The input device 103 is a device that detects the input of information from the outside, and examples of such devices include a keyboard, a mouse, a pointing device, a button, or a touch panel. 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, and the like for wired or wireless communication.

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). 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 sent and received between these devices.

In the insulation performance estimation device 1, the calculation device 101 executes calculations according to the 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 of the functional blocks (data acquisition unit 10, change rate calculation unit 11, estimation unit 12, output unit 13, and memory unit 14) of the insulation performance estimation device 1 shown in FIG. 5.

The following describes each functional block of the insulation performance estimation device 1 in detail.

The data acquisition unit 10 is a functional unit that acquires data necessary to estimate the insulation performance of the building 3 being inspected. 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.

The data acquisition unit 10 acquires room temperature data 40 and air temperature data 41 of the building 3 to be inspected. Specifically, the data acquisition unit 10 acquires room temperature data 40 and air temperature data 41 of the building 3 to be inspected from the data stored in the temperature data management device 4 by communicating with the temperature data management device 4. The data acquisition 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 memory unit 14 as temperature data 42_1 to 42_n for each unit time t.

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

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.

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

The change rate calculation unit 11 is a functional unit that calculates the rate of change 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 that represents 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 that represents 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).

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.

At this time, the change rate calculation unit 11 calculates at least the temperature drop rate R (=100%) when the heating appliance is stopped (t=t1) and the temperature drop rate R when a predetermined time ts has elapsed (t=tn) after the heating appliance is stopped, 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).

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.

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

As shown in FIG. 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 number of grades (categories) based on the Q value, and correspondence information 21 showing the correspondence between each grade and the temperature drop rate R is created in advance and stored in the memory unit 14. Then, the estimation unit 12 uses the correspondence information 21 stored in the memory unit 14 to determine a grade representing the thermal insulation performance from the temperature drop rate R calculated by the change rate calculation unit 11.

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.

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

Figure 7 shows the relationship between the temperature drop rate R and the corresponding Q value derived based on the experimental results described above (see Figure 2), and shows a box plot showing the range of the temperature drop rate R corresponding to each range of Q value for each grade 1 to 4.

For example, based on the box-and-whisker plot shown in FIG. 7, correspondence information 21 showing the correspondence between the temperature drop rate R and the grades 1 to 4 is created in advance and stored in the memory unit 14. The correspondence information 21 stored in the memory 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 in the form of a function (formula) showing the relationship between the temperature drop rate R and the grades 1 to 4.

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

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 grade indicating the insulation performance as the insulation performance estimation result 22 stored in the memory 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 information on the grade indicating the insulation performance, information on the temperature drop rate R, etc. to an external storage device, information processing device, etc. via the I/F device 104 of the insulation performance estimation device 1.

The output unit 13 may also display information representing the change over time in the temperature drop rate R of the building 3 being inspected on the screen of the display device. At this time, the output unit 13 may display information representing the change over time in the temperature drop rate R of a building other than the building 3 being 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.

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 the temperature drop rate [%], and shows a graph 400 showing the change over time in 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 in the temperature drop rate R from time t0 (=0) to time tn (=6) of a building different from the building 3 to be inspected.

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 renovation of the building 3 to be inspected.

The display screen 500 also displays areas 402 for each of the grades 1 to 4 in the two-dimensional space, and within each area 402, for example, a symbol (e.g., a star-shaped symbol) 403 is displayed indicating the size of the grade corresponding to that area. For example, four stars are displayed in the grade 4 area, and one star is displayed in the grade 1 area.

In this way, the output unit 13 may present information regarding the insulation performance of the building being inspected to the user by displaying a display screen 500 such as that shown in FIG. 8 on the display device.

Next, we will explain the process flow for estimating insulation performance using the insulation performance estimation device 1.

Figure 9 is a flow diagram showing the process flow for estimating insulation performance by the insulation performance estimation device 1 according to this embodiment.

As shown in FIG. 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 memory 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.

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 time t0 when the heating appliance is stopped, and the measured values of the room temperature (Trn) and the air temperature (Tan) at 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 time t1 to tn.

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 uses correspondence relationship information 21 between the temperature drop rate R and insulation performance grades 1 to 4 stored in advance in the storage unit 14 to select the grade corresponding to the temperature drop rate R calculated in step S2, and sets this as the insulation performance estimation result 22.

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 time tn are calculated, the output unit 13 may display a graph 400 showing the temporal change 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 one screen together with the graph 400.

As described above, the insulation performance estimation device 1 according to 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.

Specifically, the insulation performance estimation device 1 calculates the rate of change based on the ratio between a first value (Tr1-Ta1) that represents the difference between the temperature (Tr1) of one room when the heating appliance is stopped and the ambient air temperature (Ta1) of the building 3 being inspected at that time, and a second value (Trn-Tan) that represents 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 air temperature Tan of the building 3 being inspected at that time, and estimates the insulation performance of the building 3 being inspected 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.

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

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

In this way, the insulation performance estimation device 1 according to this embodiment makes it possible to estimate the insulation performance of a building more easily while minimizing the burden on residents.

In addition, by using the rate of change of temperature (temperature drop rate R) instead of the temperature itself as an index for estimating insulation performance, insulation performance can be evaluated on a common scale even if the temperature at the start of measurement differs depending on the measurement environment, etc., so it becomes easier to compare the insulation performance with other homes and before and after renovation, as described below.

In addition, the insulation performance estimation device 1 selects one class corresponding to the calculated temperature drop rate R from a plurality of pre-set classes representing the insulation performance of a building, and outputs it as the 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 and detailed numerical values such as the heat loss coefficient (Q value) are output as the insulation performance estimation result.

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 being inspected decreases, allowing residents and others to more intuitively understand the insulation performance of the building being inspected.

The insulation performance estimation device 1 further displays information (graph 405) that indicates 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 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 homes or compare the insulation performance before and after renovation.

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 grade in the two-dimensional space, and displays symbols 403 indicating the size of each grade.
This makes it possible to display 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 on a single screen, thereby enabling residents and others to understand the insulation performance of the building more intuitively.

<<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.

For example, in the above embodiment, the temperature data 41 measured by a thermometer 32 installed outside the building 3 to be inspected is used, but this is not limited to the above. 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 obtained from an external server connected to the network 5 and used as the temperature data 41. Here, the external server is a server that provides various weather data, such as a server of the Japan Meteorological Agency. This eliminates the need to install a thermometer 32 outside the building 3, further reducing the burden on residents.

In the above embodiment, various information such as the insulation performance estimation result 22 is displayed on the display device provided in the insulation performance estimation device 1, 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 a user terminal (e.g., a PC or a tablet terminal) instructs a server to execute data processing for insulation performance estimation 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.

The above-mentioned flowchart shows an example for explaining the operation, and is not limited to this. In other words, 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.

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...storage unit, 20_1 to 20_n...temperature drop rate, 21...correspondence information, 22...insulation performance estimation result, 101...computing device, 102...storage 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 (5)

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. 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. The insulation performance estimation device according to claim 1 or 2 ,
The output unit displays, on the screen, information representing a change over time in the rate of change of a building different from the inspection target building. 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. Computer,
A program that generates data showing 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 a room in which a 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 multiple classes that corresponds to the rate of change calculated in the second step using correspondence information that indicates the correspondence between the rate of change and a class that indicates the insulation performance of a building, and outputting the class as an estimated result of the insulation performance.

Images