Power reduction amount estimation system, power reduction amount verification method, and air conditioning equipment cleaning method

Abstract

To provide a method of cleaning air-conditioning equipment with which power consumption can be reduced by cleaning outdoor equipment of air-conditioning equipment.SOLUTION: A method of cleaning air-conditioning equipment, which is installed in a building, for cleaning the electric air-conditioning equipment configured by connecting indoor equipment and outdoor equipment using a refrigerant piping includes the steps of: calculating an estimated power reduction value of power consumption of the air-conditioning equipment, to be obtained by cleaning the air-conditioning equipment; measuring power consumption before cleaning the air-conditioning equipment using a watt-hour meter, for a predetermined period before cleaning the air-conditioning equipment; cleaning the air-conditioning equipment; measuring power consumption after cleaning the air-conditioning equipment using the watt-hour meter, for a predetermined period after cleaning the air-conditioning equipment; and calculating reductions of electricity based on actual measurement through cleaning the air-conditioning equipment, on the basis of the power consumption before cleaning the air-conditioning equipment and the power consumption after cleaning the air-conditioning equipment.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power reduction estimation system for electrically operated air conditioning equipment configured by connecting indoor units and outdoor units with refrigerant piping, a power reduction verification method, and a cleaning method for air conditioning equipment. [Background technology]

[0002] Patent Document 1 discloses a method for evaluating the amount of power consumption reduction in an air conditioning system that uses both a heat exchange ventilator and an air conditioner. The amount of power reduction is evaluated by comparing the amount of power consumption of the air conditioning system when the heat exchange ventilator is used to ensure the same amount of ventilation air as normal without heat exchange, with the amount of power consumption of the air conditioning system when the heat exchange ventilator is operated normally.

[0003] Patent Document 2 discloses a method for supporting the evaluation of the amount of power reduction when conserving energy by extending the stop time in adjusting the temperature of an object to be cooled by repeatedly turning on and off air conditioning equipment, etc. For air conditioning equipment that repeatedly turns on and off between a lower limit temperature setting and an upper limit temperature setting, the method calculates data that allows the amount of power reduction to be evaluated by using a hypothetical time it takes for the temperature to change from the upper limit temperature setting to the lower limit temperature, assuming that the air conditioning equipment is turned on. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-300058 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-344970 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a strong demand for reducing the power consumption of air conditioning equipment in order to curb rising electricity prices and to reduce CO2 emissions as a measure against global warming. The applicant of the present application operates a cleaning business that cleans and coats the outdoor units of electrically operated air conditioning equipment (air conditioners), thereby restoring the performance of the air conditioning equipment and contributing to a significant reduction in the power consumption of the air conditioning equipment after the cleaning process compared to before the cleaning process. The inventor of the present application has now developed a method for estimating and predicting the amount of power consumption reduction of an air conditioning equipment by performing a cleaning process (including coating and painting) on ​​the outdoor unit of the air conditioning equipment before the cleaning process is performed.

[0006] Therefore, an object of the present invention is to provide a power reduction amount estimation system that estimates the amount of power that will be reduced by cleaning (including coating and painting) the outdoor unit of the air conditioning equipment.

[0007] Another object of the present invention is to provide a power reduction verification method for verifying the power reduction estimated by the power reduction estimation system, and a cleaning method for air conditioning equipment. [Means for solving the problem]

[0008] The power reduction estimation system of the present invention, which is intended to achieve the above-mentioned object, is a power reduction estimation system that calculates an estimate of the amount of power consumption that will be reduced by cleaning an air conditioning system that is installed in a building and operates on electricity, and is composed of an indoor unit and an outdoor unit connected by refrigerant piping.The system is characterized by comprising: a data acquisition unit that acquires air conditioning system data including data on the capacity and usage status of the air conditioning system, pre-construction data including data on the degree of dirtiness of the outdoor unit of the air conditioning system before the air conditioning system is cleaned, and post-construction estimated data including data on the estimated degree of dirtiness of the outdoor unit of the air conditioning system after the air conditioning system is cleaned, based on the air conditioning system data, the pre-construction data, and the post-construction estimated data, and an output unit that outputs the power reduction estimate.

[0009] Furthermore, the power reduction verification method of the present invention is characterized by the steps of: determining the power reduction estimated value using the above-mentioned power reduction estimation system; attaching a power meter to the air conditioning equipment; measuring the power consumption of the air conditioning equipment before cleaning using the power meter for a predetermined period before cleaning the air conditioning equipment; cleaning the air conditioning equipment; measuring the power consumption of the air conditioning equipment after cleaning using the power meter for a predetermined period after cleaning the air conditioning equipment; and comparing the difference between the power consumption of the air conditioning equipment before cleaning and the power consumption of the air conditioning equipment after cleaning with the power reduction estimated value. The cleaning and construction method for air conditioning equipment of the present invention is a method for cleaning and construction of air conditioning equipment that is installed in a building and is electrically operated and configured with indoor units and outdoor units connected by refrigerant piping, and is characterized by comprising the steps of: calculating an estimated power reduction amount of the air conditioning equipment that will be reduced by cleaning and construction of the air conditioning equipment; measuring the power consumption of the air conditioning equipment before cleaning and construction using a watt-hour meter for a predetermined period before cleaning and construction of the air conditioning equipment; cleaning and construction of the air conditioning equipment; measuring the power consumption of the air conditioning equipment after cleaning and construction using a watt-hour meter for a predetermined period after cleaning and construction of the air conditioning equipment; and calculating the power reduction amount based on actual measurements due to cleaning and construction of the air conditioning equipment based on the power consumption of the air conditioning equipment before cleaning and the power consumption of the air conditioning equipment after cleaning and construction of the air conditioning equipment. [Effects of the Invention]

[0010] According to the present invention, it is possible to estimate and predict with high accuracy the amount of power reduction of an air conditioning system before and after cleaning of its outdoor unit by performing a calculation process before the cleaning work is performed. In addition, by comparing the actual power consumption before and after cleaning work with the calculated estimated amount of power reduction, it is possible to verify the accuracy of the estimated amount of power reduction. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an example of a configuration of a power reduction amount estimation system according to an embodiment of the present invention. [Figure 2] 2 is a diagram showing an example of data in a database 11a stored in a data storage unit 11 of a server device 10. FIG. [Figure 3] FIG. 3 is a flowchart showing a registration and output process in the power reduction amount estimation system according to the embodiment of the present invention. [Figure 4] 10 is a diagram showing an example of a screen display including a power reduction amount displayed on the terminal device 20. FIG. [Figure 5] 10 is a diagram showing an example of a screen display including a power reduction amount displayed on the terminal device 20. FIG. [Figure 6] FIG. 10 is a flowchart illustrating a verification process for verifying a power reduction amount obtained by calculation. [Figure 7] This is a photograph showing a watt-hour meter attached to a distribution panel connected to the outdoor unit of an air conditioning system. [Figure 8] 5 is a photograph showing an example of the state of a fin before and after cleaning. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to these embodiments. The embodiments of the present invention will be described with reference to specific drawings.

[0013] The air conditioning equipment in this embodiment is an electrically operated heat pump air conditioner (air conditioner) configured by connecting an indoor unit and an outdoor unit with refrigerant piping.

[0014] Electrically operated air conditioning equipment installed in various buildings such as homes, offices, stores, and factories gradually loses performance due to aging and the accumulation of dirt, which in turn causes the amount of electricity consumed to increase and electricity bills to rise.In particular, relatively large buildings such as factories, stores, offices, and schools are equipped with many air conditioning units according to their size, and the total power consumption of the air conditioning units is large, so even a slight deterioration in performance tends to result in a large increase in power consumption.

[0015] In order to reduce or suppress the power consumption of air conditioning equipment, it is generally known that cleaning and washing the air conditioning equipment to restore the performance of the air conditioning equipment to a certain extent is effective. In an embodiment of the present invention, a power reduction estimation system is provided that calculates an estimated value of the power consumption that can be reduced by washing the air conditioning equipment, in order to determine to what extent the power consumption can be reduced or suppressed by washing the air conditioning equipment. The power reduction estimation system of the present invention is constructed and used, for example, by a contractor that performs the cleaning work of air conditioning equipment.

[0016] 1 is a diagram showing an example of the configuration of a power reduction estimation system according to an embodiment of the present invention. The power reduction estimation system 1 is a computer system including a server device 10 on a communication network and a terminal device 20 communicatively connected to the server device 10 via the communication network. The communication network is a commercial communication line such as the Internet or a mobile phone communication network.

[0017] The server device 10 is a general-purpose computer device equipped with a memory device that stores computer programs and various data for executing the arithmetic processing in this embodiment, an arithmetic unit (CPU) that executes the computer programs, etc., and the terminal device 20 is a computer device equipped with a display screen (display), such as a personal computer, mobile phone, smartphone, or tablet terminal that is connected to a display.

[0018] The server device 10 includes a data storage unit 11 that acquires and stores air conditioning equipment data, which is data related to the capacity and usage status of the air conditioning equipment to be cleaned; pre-cleaning data, which is data related to the degree of contamination of the air conditioning equipment's outdoor unit before the air conditioning equipment is cleaned; and post-cleaning estimated data, which is an estimate of the degree of contamination of the air conditioning equipment's outdoor unit after the air conditioning equipment is cleaned. The server device 10 also includes a calculation unit 12 that calculates an estimate of the reduction in power consumption of the air conditioning equipment after the cleaning (power reduction estimate) based on the air conditioning equipment data, pre-cleaning data, and post-cleaning estimated data stored in the data storage unit 11. The server device 10 also includes a control unit 14 that executes various controls, including transmitting the power reduction estimate calculated by the calculation unit 12 to a terminal device 20 connected via a communications network and displaying it. The calculation unit 12 and the control unit 14 are implemented by a central processing unit (CPU) that executes a computer program. The data storage unit 11 is a storage medium (memory) that stores the above data and stores a database 11a.

[0019] The above air conditioning equipment data, pre-construction data, and post-construction estimated data are obtained in advance by the contractor through on-site surveys or the like before the cleaning work is carried out, and the above data may be obtained, for example, by being input directly into the server device 10, or by reading out the above data input into an external storage medium, or by transmitting the above data input into the terminal device 20 to the server device.

[0020] The terminal device 20 includes an output unit (display) 21 that displays various information such as the air conditioning equipment data, pre-construction data, and post-construction estimated data received from the server device 10, and a control unit 22 that performs transmission and reception processing with the server device 10. The control unit 22 is realized by a computing unit (CPU) that executes a computer program, etc.

[0021] The power reduction amount estimation system is not limited to a configuration including a server device and a terminal device connected via the above-mentioned communication network, but may also be a stand-alone computer device such as a personal computer. When the power reduction amount estimation system is a stand-alone computer device, the computer device combines the data storage unit 11 and the calculation unit 12 of the server device 10 and the output unit 21 of the terminal device 20 in one device, eliminating the need to send and receive data via a communication network and performing all processing on the stand-alone device.

[0022] FIG. 2 is a diagram showing an example of data in the database 11a stored in the data storage unit 11 of the server device 10. A construction ID is assigned to identify the cleaning work project that the contractor plans to carry out, and for each construction ID, the model and type of air conditioning equipment to be cleaned and the number of units are registered. In the example of FIG. 2, in order to succinctly explain the technical concept of the present invention, the simplest example will be used to explain how to obtain the amount of power reduction when cleaning one air conditioning equipment unit. Generally, there will be multiple units of air conditioning equipment to be cleaned, and there will be multiple units of each different model and type of air conditioning equipment. In such cases, the number of units is registered for each model and type, and the desired value is added up.

[0023] In the example of Figure 2, the air conditioning equipment data, which is data on the capacity and usage status of the air conditioning equipment, includes the capacity, power consumption, annual operating hours, equipment load, Design power amount The following items are registered. Capacity (kW) and power consumption (kW) are the design values ​​of the cooling capacity, heating capacity and power consumption of the air conditioning equipment in question, so-called catalog values, and if the capacity values ​​differ for cooling and heating, they are registered separately.

[0024] Annual operating hours are the operating hours of the air conditioning equipment in operation over the course of a year (the hours the operation switch is on), and are obtained by the contractor interviewing the client of the cleaning work prior to the work being carried out. Alternatively, past power consumption data is obtained from the client. If cooling and heating are distinguished, the operating hours for each are obtained and added together.

[0025] The equipment load is the ratio of the amount of power consumed when an air conditioning system is actually operating to the amount of power consumed if it were operating at the power consumption specified in its catalog. Air conditioning systems do not operate at the power consumption specified in its catalog throughout the entire operating time. Once the set temperature is reached, the system operates at a capacity lower than full power to maintain that temperature. Therefore, the actual amount of power consumed can be estimated by setting the value (percentage) of the equipment load. The equipment load can be roughly determined by the installer based on the weather conditions of the area where the air conditioning system is installed (such as the temperature of the area, whether it is cold or warm) and the environment of the installation location (for example, whether the sunlight is strong or weak, whether there is a lot of dust), etc., and is set to a value in the range of approximately 30% to 60% (0.3 to 0.6).

[0026] The design power consumption is the power consumption based on the catalog value, which does not take into account the actual dirt of the air conditioning equipment, and is calculated by the following formula (1). Design power consumption = power consumption x annual operating hours x equipment load (1) It is calculated by:

[0027] The pre-cleaning data, which is data on the power consumption of the air conditioning equipment before cleaning work, includes the dirt coefficient, power increase, and pre-cleaning power consumption. The dirt coefficient is a coefficient that corresponds to the degree of dirt adhering to the heat exchange fins of the air conditioning equipment's outdoor unit, and is set to a value in the range of, for example, 0.1 to 0.5 based on the installer's visual inspection and measurement of the thickness of dirt adhering to the fins of the outdoor unit. The dirt coefficient value is determined and set based on the installer's past work performance and evaluation / verification.

[0028] The increase in the amount of electricity consumed is due to the decrease in the efficiency of the air conditioning equipment caused by the dirt on the air conditioning equipment, and is calculated by the following formula (2). Increase in power consumption = metering Power x Dirt Coefficient (2) It is calculated by:

[0029] The amount of electricity before cleaning is the amount of electricity consumed by the air conditioning equipment before cleaning, and is calculated using the following formula (3). Energy consumption before construction = Design energy consumption + Increase in energy consumption (3) It is calculated by:

[0030] The data after cleaning, which is data on the estimated power consumption of the air conditioning equipment after cleaning, includes the dirt removal rate, power consumption after cleaning, and power reduction. All values ​​for these items are estimated.

[0031] The dirt removal rate is an estimate of the degree to which dirt adhering to air conditioning equipment can be removed by cleaning work. It is determined by the contractor based on the level and type of dirt adhering to the equipment and the degree to which dirt removal is predicted to be possible by cleaning work, and is set to a value ranging from, for example, 100% (0% remaining dirt) to 30% (70% remaining dirt).

[0032] The post-cleaning energy consumption is an estimated value of the energy consumption of the air conditioning equipment after cleaning work is carried out, and is calculated by the following formula (4) taking into account the set dirt removal rate. Energy consumption after installation = Design energy consumption + Increase in energy consumption (1 - Dirt removal rate) (4) In the above formula (4), (1-dirt removal rate) is a predetermined coefficient according to the degree of dirt on the outdoor unit after cleaning of the air conditioning equipment.

[0033] The amount of power reduction is an estimated value calculated by the difference between the amount of power consumed before and after the construction. The difference between the above formulas (3) and (4) is calculated as the following formula (5): Power reduction = Increase in power consumption x Dirt removal rate (5) It is calculated by:

[0034] The electricity rate corresponding to the amount of electricity can be calculated by multiplying the calculated amount of electricity by the electricity rate unit price.

[0035] Furthermore, by multiplying the calculated amount of power by a carbon dioxide emission coefficient, the amount of carbon dioxide emission corresponding to the amount of power can be determined.

[0036] 3 is a flowchart showing the registration and output process in the power reduction amount estimation system according to the embodiment of the present invention. This process is executed by the control unit 14 of the server device 10 and the control unit 22 of the terminal device 20.

[0037] The construction company's worker operates the terminal device 20 to input the air conditioning equipment data shown in Figure 2, which includes the air conditioning equipment capacity, power consumption, annual operating time, and equipment load data, the dirt coefficient data which is pre-construction data, and the dirt removal rate data which is post-construction data (S100), and transmits this to the server device 10 (S102).

[0038] When the server device 10 receives data from the terminal device 20 (S200), it performs the calculations of the above equations (1) to (5) to determine the amount of power reduction (S202), and transmits data of the calculation result including the determined amount of power reduction to the terminal device 20 (S204).

[0039] When the terminal device 20 receives the calculation result data (S104), it outputs the calculation result in a predetermined format (S106). The output method may be a screen display on the terminal device 20 or paper output from a printer connected to the terminal device 20.

[0040] When the power reduction amount estimation system is a stand-alone computer device, all processes except for data transmission and reception between the server device 10 and the terminal device 20 are executed by the stand-alone computer device.

[0041] 4 and 5 are diagrams showing examples of screen displays including the amount of power reduction displayed on the terminal device 20. In the example screen shown in FIG. 4, the data input for calculation, the calculated results, such as the design power amount, the power amount before construction, the power amount after construction, the amount of power reduction (the amount of power before construction minus the amount of power after construction), and the power charges and carbon dioxide emissions corresponding to each amount of power are displayed in a tabular format as a trial balance. FIG. 5 shows the amount of power reduction in the form of a pie chart. As shown in FIGS. 4 and 5, the amount of power reduction and the corresponding reduction in electricity charges and carbon dioxide emissions may be displayed as numbers that are rounded to a certain extent, for ease of understanding, rather than in units of one yen, within a range that does not result in error. Preferably, as shown in FIGS. 4 and 5, the reduction rate of power consumption (power charges, carbon dioxide emissions) may also be displayed as a numerical value.

[0042] 6 is a flowchart of the verification process for verifying the calculated power reduction amount. Since the power reduction amount calculated above is an estimated value, the power consumption of the air conditioning equipment that has been cleaned is measured for a predetermined period before and after the actual cleaning work, and the estimated value is compared with the actual measured value for verification.

[0043] Before the cleaning work begins, a watt-hour meter that measures the amount of electricity is attached to the power wiring or distribution panel of the outdoor unit of the air conditioning equipment to be cleaned (S300), and the amount of electricity consumed is measured for a predetermined period (for example, about one week) before the cleaning work begins (S302), and the measurement data and the weather conditions during the measurement period (temperature, humidity, precipitation, wind speed, wind direction, etc.) are recorded (S304). Figure 7 is a photograph showing the watt-hour meter attached to the distribution panel connected to the outdoor unit of the air conditioning equipment.

[0044] After a predetermined period of time has passed, the air conditioning equipment is cleaned (S306). The cleaning is performed according to the following procedure. This cleaning can reduce the amount of power consumed by the air conditioning equipment by approximately 10% on average. (1) Fin brushing (removing dirt from the fins of the outdoor unit using a brush) (2) Water cleaning (removing dirt from the fins using water) (3) Chemical cleaning (removing dirt from the fins using chemicals such as fin cleaners) (4) Rinse (removing residual chemicals (cleaning agents) with water) (5) Rinse treatment (neutralizing the fins with a neutralizing agent) (6) Corrosion coating treatment (coating the fins with a corrosion prevention coating agent and then painting the fins with heat-shielding paint) Figure 8 is a photograph showing an example of the condition of the fin before and after cleaning. The black dirt that was attached to the fin before cleaning, shown in Figure 8(a), has been completely removed by cleaning, as shown in Figure 8(b).

[0045] Even after the cleaning work is completed, the amount of power consumed is measured for a predetermined period of time (for example, about one week) after the cleaning work is completed using the watt-hour meter that was left attached in S300 (or, if the watt-hour meter was removed during the cleaning work, it is reinstalled after the cleaning work in the same position as before the cleaning work) (S308), and further, the measurement data and the weather conditions (temperature, humidity, etc.) during the measurement period are recorded (S310), just as before the cleaning work is completed.

[0046] From the measurement data before and after the cleaning work, the actual change in the power consumption of the air conditioning equipment before and after the work is calculated, and compared with the estimated value of the power reduction (converted to a value for a specified period) calculated by the above calculation (S312). Note that the measurement data used for the actual change is selected from measurement data taken on days when the weather conditions, such as temperature, were nearly identical before and after the work, and this actual change is calculated. Because the amount of power consumed by air conditioning equipment varies greatly depending on the weather conditions, when calculating the actual change in measurement data over a relatively short period of time, by using data from days when the weather conditions before and after the work were substantially the same (for example, a temperature difference of within 1°C), it is possible to accurately compare it with the estimated value of the power reduction and verify its accuracy.

[0047] It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that the present invention also includes design changes that do not deviate from the gist of the present invention, including various modifications and alterations that would be conceivable to a person with ordinary knowledge in the field of the present invention. [Explanation of symbols]

[0048] 1: Power reduction amount estimation system, 10: Server device, 11: Data storage unit, 11a: Database, 12: Calculation unit, 14: (Server side) control unit, 20: Terminal device, 21: Output unit, 22: (Terminal side) control unit

Claims

1. A cleaning method for air conditioning equipment installed in a building, the air conditioning equipment being electrically operated and consisting of an indoor unit and an outdoor unit connected by refrigerant piping, comprising: calculating an estimated value of the amount of power consumption of the air conditioning equipment that will be reduced by cleaning the air conditioning equipment; a step of measuring the amount of power consumed by the air conditioning equipment before cleaning using a watt-hour meter for a predetermined period of time before cleaning the air conditioning equipment; a step of cleaning and installing the air conditioning equipment; a step of measuring the amount of power consumed by the air conditioning equipment after cleaning using a watt-hour meter for a predetermined period of time after cleaning the air conditioning equipment; a step of calculating an amount of power reduction based on actual measurements due to the cleaning of the air conditioning equipment based on the amount of power consumption before the cleaning of the air conditioning equipment and the amount of power consumption after the cleaning of the air conditioning equipment; The cleaning step includes: a process of cleaning the outdoor unit of the air conditioning equipment with a cleaning agent; a process of rinsing the outdoor unit of the air conditioning equipment and then neutralizing it with a neutralizing agent; a process of coating the outdoor unit of the air conditioning equipment with a corrosion prevention coating agent; and painting the outdoor unit of the air conditioning equipment with a heat-shielding paint, The step of calculating the power reduction amount estimate includes the steps of: A process of acquiring air conditioning equipment data including data on the capacity and usage status of the air conditioning equipment, pre-cleaning data including data on the degree of dirt on the outdoor unit of the air conditioning equipment before cleaning of the air conditioning equipment, and post-cleaning estimated data including data on the estimated degree of dirt on the outdoor unit of the air conditioning equipment after cleaning of the air conditioning equipment; and calculating an estimated power reduction amount of the amount of power consumption of the air conditioning equipment after cleaning is performed relative to the amount of power consumption of the air conditioning equipment before cleaning is performed, based on the air conditioning equipment data, the pre-cleaning data, and the post-cleaning estimated data.

2. 2. The method for cleaning an air conditioning system according to claim 1, wherein the degree of dirt on the outdoor unit of the air conditioning system is the degree of dirt on heat exchange fins of the outdoor unit.

3. 2. The method for cleaning an air conditioning equipment according to claim 1, further comprising: calculating the amount of power consumed by the air conditioning equipment before cleaning and an estimated value of the amount of power consumed by the air conditioning equipment after cleaning based on the air conditioning equipment data, the pre-cleaning data, and the post-cleaning estimated data; and calculating the estimated amount of power reduction from the difference between these values.

4. 2. The method for cleaning air conditioning equipment according to claim 1, wherein the amount of power consumed by the air conditioning equipment before cleaning is a value obtained by adding a value of an increase in power obtained by multiplying the design power amount, which is the amount of power consumed by the air conditioning equipment if the outdoor unit of the air conditioning equipment were not dirty, by a predetermined coefficient corresponding to the degree of dirt on the outdoor unit of the air conditioning equipment before cleaning.

5. 5. The method for cleaning an air conditioning system according to claim 4, wherein the amount of power consumed by the air conditioning system after cleaning is calculated by multiplying the increase in power consumption by a predetermined coefficient corresponding to the degree of dirtiness of the outdoor unit after cleaning of the air conditioning system, and adding the result to the designed amount of power consumption.

6. A cleaning method for air conditioning equipment, which is installed in a building and is electrically operated and has an indoor unit and an outdoor unit connected by refrigerant piping, comprising: calculating an estimated value of the amount of power consumption of the air conditioning equipment that will be reduced by cleaning the air conditioning equipment; a step of measuring the amount of power consumed by the air conditioning equipment before cleaning using a watt-hour meter for a predetermined period of time before cleaning the air conditioning equipment; a step of cleaning and installing the air conditioning equipment; a step of measuring the amount of power consumed by the air conditioning equipment after cleaning using a watt-hour meter for a predetermined period of time after cleaning the air conditioning equipment; a step of calculating an amount of power reduction based on actual measurements due to the cleaning of the air conditioning equipment based on the amount of power consumption before the cleaning of the air conditioning equipment and the amount of power consumption after the cleaning of the air conditioning equipment; The step of calculating the power reduction amount estimate includes the steps of: A process of acquiring air conditioning equipment data including data on the capacity and usage status of the air conditioning equipment, pre-cleaning data including data on the degree of dirt on the outdoor unit of the air conditioning equipment before cleaning of the air conditioning equipment, and post-cleaning estimated data including data on the estimated degree of dirt on the outdoor unit of the air conditioning equipment after cleaning of the air conditioning equipment; and calculating an estimated power reduction amount of the amount of power consumption of the air conditioning equipment after cleaning is performed relative to the amount of power consumption of the air conditioning equipment before cleaning is performed, based on the air conditioning equipment data, the pre-cleaning data, and the post-cleaning estimated data.

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