JP2021081167A - Short circuit evaluation device for air conditioner - Google Patents

Abstract

To provide a short circuit evaluation device for an air conditioner, enabling not only the occurrence of short circuit in the air conditioner but also its extent to be known.SOLUTION: A short circuit evaluation device 1 for an air conditioner comprises: input means 4 which receives, as input, an outside air temperature at the place where an air conditioner CR to be evaluated is installed and a suction temperature of an outdoor unit OU of the air conditioner CR; control means 8 which calculates an outside air suction relational expression (1)n as a relational expression between the outside air temperature An and suction temperature In from the outside air temperature An and the suction temperature In; and communication means 7 which receives from an outside air temperature information server AIS, period outside air temperatures (a daily outside air temperature AD, a monthly outside air temperature AM, and a yearly outside air temperature AY) in an area I (area information LI) belonging to the installation place of the air conditioner CR1, CR2. The control means 8 sequentially applies the period outside air temperatures to the outside air suction relational expression (1) to calculate period suction temperatures (a daily suction temperature IDn, a monthly suction temperature IMn, and a yearly suction temperature IYn).SELECTED DRAWING: Figure 1

Description

The present invention relates to an air conditioner short circuit evaluation device capable of evaluating whether or not a short circuit occurs during operation of the air conditioner.

Japanese Patent Application Laid-Open No. 2002-349926 (Patent Document 1) discloses detection of a short circuit.
In this detection, the temperature difference obtained by subtracting the suction temperature obtained from the thermometer of the outdoor unit from the outside air temperature obtained from the meteorological data is accumulated. Then, the deviation value obtained by subtracting the maximum value and the minimum value of the temperature difference is compared with a predetermined threshold value, and if the deviation value is equal to or more than the threshold value, it is determined that a short circuit has occurred.

JP-A-2002-349926

In the above-mentioned detection of a short circuit, only the presence or absence of a short circuit is known, and it takes a lot of time and effort to detect it. In addition, it is difficult to measure the load factor of the air conditioner on site.
Therefore, one of the main objects of the present invention is to provide a short circuit evaluation device for an air conditioner that can detect not only the presence or absence of a short circuit but also the degree of the occurrence of the short circuit.
Another main object of the present invention is to provide a short circuit evaluation device for an air conditioner that requires less time and effort for analysis.
Further, another one of the main objects of the present invention is to provide a short circuit evaluation device for an air conditioner capable of performing analysis in consideration of a load factor.

In order to achieve the above object, the invention according to claim 1 is to input the outside air temperature, which is the temperature of the outside air at the installation location of the air conditioner to be evaluated, and the suction temperature, which is the temperature of the outside air sucked into the outdoor unit. In the area belonging to the installation location, the input means for receiving the outside air temperature and the control means for calculating the outside air suction relational expression which is the relational expression between the outside air temperature and the suction temperature in the air conditioner from the outside air temperature and the suction temperature. The control means includes a communication means for receiving a period outside air temperature, which is a set of a plurality of outside air temperatures within a predetermined period in the past, from an outside air temperature information server in which the outside air temperature is accumulated, and the control means is provided with the period outside air. It is characterized in that the temperature is sequentially applied to the outside air suction relational expression to calculate the period suction temperature which is a set of a plurality of suction temperatures within the predetermined period.
According to the second aspect of the present invention, in the above invention, the input means receives an input of a blowout temperature which is the temperature of the exhaust emitted from the outdoor unit, and the control means receives the blowout temperature and the load of the air conditioner. It is possible to refer to the blowout load factor relational expression showing the relationship with the rate, and it is characterized in that the load factor is calculated by applying the blowout temperature to the blowout load factor relational expression.
The invention according to claim 3 is characterized in that, in the above invention, the control means calculates at least one of the power consumption and the COP related to the air conditioner from the period suction temperature and the load factor. is there.
The invention according to claim 4 is characterized in that the control means calculates a running cost related to the air conditioner from the power consumption, the charge unit price which is the unit price of the electricity charge, and the evaluation period. is there.

One of the main effects of the present invention is to provide a short circuit evaluation device for an air conditioner that can detect not only the presence or absence of a short circuit but also the degree of the occurrence of the short circuit.
Further, another one of the main effects of the present invention is to provide a short circuit evaluation device for an air conditioner that requires less time and effort for analysis.
Further, another one of the main effects of the present invention is to provide a short circuit evaluation device for an air conditioner capable of performing analysis in consideration of the load factor.

It is a block diagram of the short circuit evaluation apparatus (SC evaluation apparatus) of the air conditioner of this invention. It is a flowchart of the 1st case concerning the operation of the SC evaluation apparatus of this invention. It is a perspective view which shows the installation situation of the outdoor unit which concerns on the 1st case. It is a side view of FIG. It is a graph which shows the daily outside air temperature distribution in the 1st case. It is a graph concerning the blowout load factor relational expression which shows the relationship between the blowout average temperature and the load factor in the 1st case. It is a graph related to the load pattern which shows the relationship between the time and the load factor in the day of the "store" in August in the first case. It is a graph of the temperature condition-COP distribution for each load factor related to cooling in the first case. It is a graph of the temperature condition-COP distribution for each load factor related to heating in the first case. It is a graph which shows the daily distribution of the outside air temperature and the daily distribution of the suction temperature of 5 kinds of outdoor units in the 1st case. It is a perspective view which shows the installation situation of the outdoor unit which concerns on the 2nd case. It is a graph which shows the daily distribution of the outside air temperature and the daily distribution of the suction temperature of 5 kinds of outdoor units in the 2nd case.

Hereinafter, embodiments of the present invention and examples of modifications thereof will be described as appropriate with reference to the drawings. The present invention is not limited to the following forms and modifications.

[Configuration, etc.]
FIG. 1 is a block diagram of a short circuit evaluation device (SC evaluation device 1) for an air conditioner according to the present invention.
The SC evaluation device 1 includes an SC analyzer 2.
The SC analyzer 2 includes a display means 3, an input means 4, a storage means 6, a communication means 7, and a control means 8.
The SC analyzer 2 is formed by, for example, a portable computer.

The display means 3 is a means capable of displaying various types of information.
The display means 3 is, for example, at least one of a flat display such as a liquid crystal display and a printer.

The input means 4 is a means capable of inputting various kinds of information.
The input means 4 is, for example, at least one of a keyboard, a pointing device, a button and a switch.
The display means 3 and the input means 4 may be formed by a display with a touch sensor, that is, a touch panel.

The storage means 6 is a means capable of storing various types of information.
The storage means 6 is, for example, at least one of a hard disk, a memory, and an optical disk.
The SC evaluation program EP, the air conditioner database CD, and the load pattern database LD are stored in the storage means 6.
The air conditioner database CD has equipment information of the air conditioner CR for each manufacturer and model of the air conditioner CR. The equipment information of the air conditioner CR is, here, the rated power consumption, the rated capacity, and the installed capacity, the distribution of the power consumption P with respect to the temperature conditions (outside air temperature A, suction temperature I) for each load factor R, and each load factor R. It is the distribution of the energy consumption efficiency COP (Coefficient Of Performance) with respect to the temperature condition of (see FIGS. 8 and 9). At least one of the device information of the air conditioner CR may be divided into cooling and heating, and the same applies to other information and the like.
The load pattern database LD is a load that is a relationship of a load factor (vertical axis) with respect to a time (horizontal axis) for each type (industry) and month of building information BI, which is information about a building in which an air conditioner CR is installed. It has a pattern LP. The load pattern LP in August, in which the type of building information BI is “store”, is shown by a dotted line in FIG. 7 (detailed later). In addition to the "store" in the type of building information BI, there are, for example, "office", "factory", "house", "hospital", "hotel" and the like.

The communication means 7 is a means capable of communicating various types of information.
The communication means 7 is, for example, at least one of an interface and a modem.

The outside air temperature information server AIS is communicably connected to the communication means 7 via the Internet NET. The outside air temperature information server AIS may be connected to the communication means 7 by a dedicated line or the like.
The outside air temperature information server AIS stores the outside air temperature A for each region and each date and time, and can output the outside air temperature A according to the designation of the region and the date and time.
The outside air temperature information server AIS may store only the outside air temperature A, or may store the outside air temperature A together with various weather information like a weather information server (AMeDAS or the like).

Further, the outside air temperature sensor AS, the outlet temperature sensor OS, and the suction temperature sensor IS are connected to the communication means 7 so as to be able to communicate with each other.
The outside air temperature sensor AS is installed at a location away from the outdoor unit OU of the air conditioner CR. The outside air temperature sensor AS can detect and output the outside air temperature A, which is the temperature of the relevant portion. The outside air temperature A may be obtained from the outside air temperature information server AIS. In this case, the outside air temperature sensor AS may be omitted.
The outlet temperature sensor OS is installed at the outlet of the outdoor unit OU of the air conditioner CR or at a position adjacent thereto. The blowout temperature sensor OS can detect and output the blowout temperature O, which is the temperature of the relevant portion, that is, the temperature of the wind blown out from the outlet of the outdoor unit OU. The blowing temperature O may be obtained from a temperature sensor built in the outdoor unit OU. In this case, the blowout temperature sensor OS may be omitted.
The suction temperature sensor IS is installed at the suction port of the outdoor unit OU of the air conditioner CR or at a position adjacent thereto. The suction temperature sensor IS can detect and output the suction temperature I, which is the temperature of the relevant portion, that is, the temperature of the wind sucked from the suction port of the outdoor unit OU. The suction temperature I may be obtained from the temperature sensor built in the outdoor unit OU. In this case, the suction temperature sensor IS may be omitted.
At least one of the outside air temperature A, the blowing temperature O, and the suction temperature I may be recognized by the user by the thermometer and input from the input means 4 by the user.

The control means 8 is a means for controlling various means.
The control means 8 is, for example, a CPU.
The control means 8 controls various means by executing the SC evaluation program EP with reference to the storage means 6.

[First case]
Hereinafter, the first case and the second case relating to the operation of the SC evaluation device 1 will be described focusing on the first case.
FIG. 2 is a flowchart of a first case relating to the operation of the SC evaluation device 1.
In the first case, as shown in FIGS. 3 and 4, 10 outdoor units OU1 (10 outdoor units OU1) under the outdoor roof RO in a one-story store SH1 ^{with a floor area of 3000 m 2 (square meter) in Nagoya City.} The outdoor units OU1-1 to OU1-10) are intended for the air conditioner CR1 installed in a row along the outer wall EW. The outdoor units OU1-1 to OU1-10 have a rectangular parallelepiped shape, their suction ports are arranged on the back surface (the surface on the outer wall EW side), and the air outlets are arranged on the upper surface (top blowing). Therefore, the blown wind OB is blown toward the roof RO. In addition, short circuit SC1 may occur.
The business hours and working hours of the store SH1, that is, the operating hours of the air conditioner CR1 in the store SH1, are from 8:00 am to 10:00 pm.

First, the control means 8 of the SC analyzer 2 is, from the outside air temperature sensor AS, the outlet temperature sensor OS, and the suction temperature sensor IS, the outside air temperature _An , which is the temperature of the outside air in the store SH1 as the installation location of the air conditioner CR1. and receiving at outlet temperature O _n and the communication means 7 the suction temperature I _n is the outside air temperature sucked to the outdoor unit _OU1, the temperature of the exhaust gas exiting from the outdoor unit OU1, stored in the storage unit 6 (temperature Step S1-1) related to measurement.
Here, these temperatures are grasped for each outdoor unit OU1-1 to OU1-10 as shown in the left half of Table 1 below (n = 1 to 10, that is, the outside air temperature A _{1 to} A _10). , Blow-out temperature O _{1 to} O ₁₀ , Suction temperature I _{1 to} I ₁₀ ). These temperatures were measured at 11:00 am in August.
Further, these temperatures are measured here at once after the outside air temperature sensor AS, the outlet temperature sensor OS, and the suction temperature sensor IS are stabilized. The time required for temperature measurement is about 1 minute for each outdoor unit OU1-1 to OU1-10, including the stabilization time of each sensor. Incidentally, the outside air temperature A _n, outlet temperature O _n, and at least one of the suction temperature I _n, may be the average value of the plurality of measured values.

Next, the control means 8 receives the inputs of the area information LI, the building information BI, and the air conditioner information CI in the display means 3 and the input means 4, and stores them in the storage means 6 (step S1-2 related to the current status confirmation). ..
The area information LI is information about the area to which the air conditioner CR1 belongs, and here, "Nagoya City" is selectively input.
The building information BI is information about the building in which the air conditioner CR1 is installed. Here, "store" is selectively input as the type, and "from 8:00 am to 10:00 pm" is input as the operating time. ^{In addition, "3000 m 2} " may be input together as the air conditioning area of the building information BI. Further, at least one of the operating time and the air-conditioned area may be treated as information other than the building information BI. For other information, at least one of the items, names and associations may be changed as appropriate.
The air conditioner information CI _n is information about the air conditioner CR1. Here, for the outdoor units OU1-1 to OU1-10, "Company M" is selected and input as the manufacturer, and "PU" is selected and input as the model. To. In the air conditioner database CD, the equipment information of "PU" of "Company M" is said to have a cooling capacity of 56 kW.
Steps S1-1 and S1-2 can be collectively regarded as step S1 related to input.

Subsequently, the control unit 8 from the acquired outside air temperature _{A n} and the suction temperature _{I n,} the outside air inlet relation is a relation of these temperatures in the target store SH1, the outdoor unit OU1-1~OU1-10 Each is calculated (step S2-1).
A number of separate case analyzes have shown that the suction temperature I is a linear function of the outside air temperature A. That is, the outside air suction relational expression is generally expressed by the following equation (1).
I = αA + β (1)

In the ideal case where there is no SC, the outside air suction relational expression (1) is α = 1 because the suction temperature I = the outside air temperature A.
Further, here, the temperature at which the outdoor unit OU1 does not operate in the middle season or the like is set to 25 ° C., and the outside air suction relational expression (1) is based on a graph in which the outside air temperature A is the horizontal axis and the suction temperature I is the vertical axis. It is assumed that the straight line of temperature I = outside air temperature A intersects at the point of suction temperature I = outside air temperature A = 25 ° C. (initial setting). The temperature of 25 ° C. can be changed as appropriate according to at least one of the building form and the actual condition. For example, the temperature of 25 ° C. can be changed to a value within the range of 5 ° C. or higher and 30 ° C. or lower.
Thus, outside air inlet relation of each outdoor unit OU1-1~OU1-10 _{(1) n} is one (outside air temperature _{A n,} suction temperature _{I n)} Knowing the point, this point and (25, 25) It is represented by a straight line connecting the points, and α _n and β _{n of the outside air suction relational expression (1) n} are calculated, respectively.
_{The outside air suction relational expression (1) n} may be changed according to the actual situation, such as calculating by using various temperatures measured on different days together. Outside air inlet equation (1) _n is the same day or a plurality of measured on different days (outside air temperature A _n, suction temperature I _n) terms used in, for example, in terms of the average value of each temperature (25, 25) the straight line connecting the point and, or more (the outside air temperature a _n, suction temperature I _n) may be defined by a straight line determined by the least squares method in consideration of the points of the points and (25, 25) of. Outside air inlet equation _{(1) n,} a plurality of (outside air temperature _{A n,} suction temperature _{I n)} is calculated only from the viewpoint of, in terms of per (25, 25) to the calculation may not be considered.

Next, the control means 8 is a set (distribution) of a plurality of outside air temperatures A within a predetermined period in the past in the area belonging to the installation location of the air conditioner CR1, the daily outside air temperature AD, the monthly outside air temperature AM, and the annual outside air temperature AY. Is confirmed (step S2-2).
That is, as shown in FIG. 5, the control means 8 informs the outside air temperature information server AIS via the communication means 7 and the Internet NET that the area information LI and one day of the same date (one year ago). Inquire about the daily outside air temperature distribution ADD, which is the distribution of the outside air temperature A. The daily outside air temperature distribution ADD is, for example, a set of hourly outside air temperatures in the area and day. The unit (interval) time may be a shorter time (5 minutes or the like) or a longer time (2 hours or the like). Further, the control means 8 may inquire about the daily outside air temperature distribution ADD for one day other than the same month and day.
In response to this inquiry, the outside air temperature information server AIS transmits the daily outside air temperature distribution ADD to the SC analyzer 2 via the Internet NET.
The control means 8 receives the daily outside air temperature distribution ADD in the communication means 7 and stores it in the storage means 6 as the daily outside air temperature AD.
Similarly, the control means 8 specifies the regional information LI and the same month, inquires about the monthly outside air temperature distribution which is the distribution of the outside air temperature A in the same month of the previous year, obtains the monthly outside air temperature distribution from the outside air temperature information server AIS, and obtains the monthly outside air temperature distribution. It is stored in the storage means 6 as the monthly outside air temperature AM. The time as a unit (interval) may be the same as (1 hour) or different from the daily outside air temperature distribution ADD. Further, the monthly outside air temperature distribution may be a set of daily average temperature, daytime average temperature, daytime maximum temperature, etc., or weekly average temperature.
Similarly, the control means 8 specifies the regional information LI, inquires about the annual outside air temperature distribution which is the distribution of the outside air temperature A for one year, obtains the annual outside air temperature distribution from the outside air temperature information server AIS, and obtains the annual outside air temperature distribution. It is stored in the storage means 6 as the temperature AY. The time as a unit (interval) may be the same as or different from at least one of the daily outside air temperature distribution ADD and the monthly outside air temperature distribution. Further, the annual outside air temperature distribution may be a set of monthly average temperature and the like.

_{Subsequently, the control means 8 calculates the daily suction temperature ID n} from the daily outside air temperature AD by the outside air suction relational expression (1) _n (see the double-headed arrow AA1 in FIG. 5, step S2-3). That is, the control means 8 applies the outside air temperature A belonging to the daily outside air temperature distribution ADD to the outside air suction relational expression (1) one after another for each of the outdoor units OU1-1 to OU1-10, and corresponds to the daily suction temperature ID _n . Calculate the daily suction temperature distribution IDD.
Similarly, the control means 8 calculates the _{monthly suction temperature IM n} for each of the outdoor units OU1-1 to OU1-10 from the monthly outside air temperature AM.
Further, similarly, the control means 8 calculates the _{annual suction temperature IY n} for each of the outdoor units OU1-1 to OU1-10 from the annual outside air temperature AY.
Steps S2-1 to S2-3 can be regarded as step S2 related to temperature acquisition for measuring, inquiring, and calculating various temperatures.

Then, the control means 8 calculates a short circuit ratio SCR (Short Circuit Ratio), which is an index indicating the degree of influence by SC, for each outdoor unit OU1-1 to OU1-10 (SCR _n , step S3).
Here, the control unit 8, as shown in the right half of Table 1 is calculated by combining the suction outside air temperature difference .DELTA.Ti _n obtained by subtracting the outside air temperature A _n corresponding from the suction temperature I _n. The calculation of .DELTA.Ti _n may be omitted.
SCR is expressed by the following equation (2).
SCR = (suction temperature I-outside air temperature A) / (blowing temperature O-outside air temperature A) (2)
= ΔTi / (OA)
SCR _n is shown on the right of .DELTA.Ti _n in the right half of Table 1.

Subsequently, the control means 8 calculates the load factor R related to the air conditioner CR1 (step S4-1).
The control means 8 receives the selection input related to the following two types of load factor calculation methods in the input means 4, and calculates the load factor R in the input method. The method for calculating the load factor R may be automatically selected according to the state of information storage, etc., may be limited to one of the methods, or may be another method. good.

As the first method, as shown in FIG. 6, the blowout temperature O (“blowout average temperature”) and the load factor R are previously obtained from a plurality of examples (“whole”) according to the type of the air conditioner CR1. are outlet load factor equation (polynomial (total)) is not obtained stored in the air conditioner database CD showing the relationship, the control unit 8, outlet load average of a blowout average temperature of all the air temperature O _n The load factor R of the air conditioner CR1 is calculated by applying it to the rate relational expression. Acquisition from each example of the blowout load factor relational expression is performed by the least squares method or the like.
For example, when the blowout average temperature is 47.9 ° C., the control means 8 sets y = 0.0009x-0.0251x + 0.2015, which is a blowout load factor relational expression in which the blowout average temperature is x and the load factor is y. By applying, the load factor is calculated as 100%.

As a second method, when the actual power consumption is measured by inserting a power meter into the power supply circuit of the air conditioner CR1, the control means 8 receives the input of the measured power consumption by the input means 4. , The load factor R of the air conditioner CR1 is calculated by calculating together with the rated power consumption and the rated capacity of the air conditioner CR1 obtained by referring to the air conditioner database CD.
That is, the control means 8 calculates the load factor R (capacity ratio) of the air conditioner CR1 from the power ratio obtained by dividing the measured power consumption by the rated power consumption and the outside air temperature A or the suction temperature I. This calculation may be any, for example, using the database described in Japanese Patent No. 5318519 relating to the applicant.

Next, the control means 8 calculates the load L related to the air conditioner CR1 (step S4-2).
When the load factor R is calculated by the first method in step S4-1, the control means 8 calculates the load L in days and months as follows.
That is, the control means 8 refers to the building information BI and grasps that the air conditioner CR1 is installed in the “store”. Further, the control means 8 grasps the current month as "August".
The control means 8 refers to the load pattern database LD and grasps the load pattern LP in the “August” day of the “store” shown by the dotted line in FIG. 7. This load pattern LP has a normal distribution-like basic shape having an early time rise and a late time fall in a graph in which the horizontal axis is time and the vertical axis is load factor, and the minimum value is set at the center time. It has a recessed part, and represents a typical (typical) load factor transition during the day in August of the "store".

Then, the control means 8 corrects the daily load pattern LP to obtain the daily corrected load pattern LPR (see the double-headed arrows AA2 and AA3 in FIG. 7).
That is, at present (11:00 am in August), the load factor in the load pattern LP is 80%, but in the actual calculation (step S4-1), the load factor is measured as 100%. Therefore, the control means 8 adjusts the load pattern LP in the vertical direction so that the load factor at 11:00 am is 100% in the calculation of the corrected load pattern LPR (lift, double-headed arrow AA2). Here, the load pattern LP is lifted at the same magnification (100/80 = 1.25 times) at each time, and may be lifted by translation or the like.
Further, when the control means 8 deviates from the time range in the load pattern LP and the operating time in the building information BI "from 8:00 am to 10:00 pm" in the calculation of the corrected load pattern LPR, The load pattern LP is expanded and contracted in the horizontal axis direction so as to match "from 8:00 am to 10:00 pm" (double-headed arrow AA3). Here, the expansion and contraction of the load pattern LP is performed so as to have the same magnification at each time, and may be performed in a state where at least one of the rising shape, the falling shape, and the recessed shape is held.

Further, the control means 8 calculates the current daily load L of the air conditioner CR1 by multiplying the load factor R represented by the daily corrected load pattern LPR by the installed capacity obtained from the air conditioner database CD.
Further, the control means 8 calculates the monthly load L by multiplying the daily load L by the number of days in the month (31 in August).

On the other hand, when the load factor R is calculated by the second method in step S4-1, the control means 8 _{multiplies the load factor R by the rated capacity related to the air conditioner information CI n} to obtain the load L (capacity). Is calculated.
The combination of steps S4-1 and S4-2 can be regarded as step S4 related to the load assumption.

Subsequently, the control means 8 calculates the power consumption P and the COP (steps S5-1 and S5-2). Steps S5-1 and S5-2 are collectively regarded as step S5 related to the calculation of capacity, power, and environmental friendliness.
The control means 8 similarly calculates the power consumption P and the COP. The calculation of COP will be described below. COP = load L / power consumption P. Alternatively, other energy efficiency indicators may be calculated in place of or in combination with the COP.

The control means 8 refers to the temperature condition-COP distribution for each load factor R during cooling in the air conditioner database CD shown in FIG. 8, and the COP when the temperature condition is the outside air temperature A and SC is not generated. and SC-free COP is, the SC chromatic COP is COP when it is estimated that SC has occurred when the temperature condition is higher than the suction temperature I a _n outside air temperature a, the corresponding load ratio R (Refer to each thick dotted arrow in FIG. 8). The temperature condition-COP distribution for each load factor R is obtained in advance. For example, the air conditioner CR1 is operated in the laboratory, the load factor R and the temperature conditions are sequentially changed, and the COPs are measured respectively.
The temperature condition-COP distribution may be stored in any format in the air conditioner database CD, for example, in a table format or in a function format. The same applies to other distributions and the like. Further, FIG. 9 shows the temperature condition-COP distribution for each load factor R during heating.

Next, the control means 8 calculates the running cost RC from the power consumption P, the charge unit price UP (for example, 20 yen / kWh), and the evaluation period ET (for example, from June to October) (step S6).
The storage means 6 stores the charge unit price UP. The control means 8 may accept the input of the charge unit price in the input means 4.
The control means 8 accepts the input of the evaluation period ET in the input means 4, for example, by each selection input of the start period and the end period. The control means 8 stores the input evaluation period ET in the storage means 6.
The control means 8 integrates the product of the power consumption P and the charge unit price UP over the evaluation period ET to calculate the running cost RC related to the electricity charge of the air conditioner CR1.

Then, the control means 8 causes the display means 3 to display various types of information in response to the input from the input means 4 regarding the type of information to be displayed (step S7). The control means 8 may display at least one of various types of information regardless of the presence or absence of input from the input means 4.
That is, the control means 8 displays the SCR in Table 1 above. The display format of the SCR may be any, for example, at least one of a tabular format and a graph format. The display format of other information can be changed in the same manner as the display format of SCR. Further, the control means 8 may display at least one of the outside air temperature A, the blowing temperature O, the suction temperature I, and the suction outside air temperature difference ΔT _{i together with the SCR.}
Further, the control means 8 displays the COP reduction rate shown in Table 2 below. The control means 8 may display at least one of the reference COP, the calculated COP, and the difference between them, together with the reduction rate of the COP. Further, the control means 8 displays the reduction rate of the power consumption calculated in the same manner as the COP in the same manner as the reduction rate of the COP.
Further, the control means 8 displays various power consumption amounts and cost increase rates shown in Tables 3 to 4 below. Table 3 shows the average value and the highest temperature day (year) for the outdoor units OU1-1 to OU1-5, and Table 4 shows the average value and the highest value for the outdoor units OU1-6 to OU1-10. It is for the temperature day (year). The control means 8 may display at least one of a reference value, a calculated value, and a difference between them, together with various ratios. Further, the outdoor unit OU1 may be grouped by 4 units, 6 units, or the like instead of 5 units at a time.

In this way, the user can specifically grasp the degree of SC in the air conditioner CR1 (outdoor unit OU1) and the cost increase (economic loss) caused by SC by referring to the display of various information. Can be done.
Further, if the user grasps the degree of SC and the cost caused by SC before and after taking measures such as installing a rectifying wall on the SC, the effect of the measures can be grasped.
Moreover, for the calculation of the degree of SC and the cost due to SC, the SC analyzer 2, the outside air temperature sensor AS, the blowout temperature sensor OS, and the suction temperature sensor IS are brought to the installation location of the air conditioner CR1 and the outside air temperature A. , The blowing temperature O, and the suction temperature I can be easily measured only once.

Further, even if the measurement of the outside air temperature A, the blowout temperature O, and the suction temperature I is other than midsummer, the control means 8 acquires the outside air temperature A related to the maximum temperature day from the outside air temperature information server AIS, and the maximum thereof is obtained. By calculating the suction temperature I at the outside air temperature A, it is possible to predict that the air conditioner CR1 will stop due to an increase in the suction temperature I.
FIG. 10 is a graph showing the daily distribution of the outside air temperature A and the daily distribution of the suction temperatures I _{1 to} I _{5 of the outdoor units OU1-1 to OU1-5 on the highest temperature day.}
The control means 8 acquires the daily distribution of the outside air temperature A related to the maximum temperature day from the outside air temperature information server AIS, and obtains the daily distribution of the suction temperatures I _{1 to} I _{5 within the operating time of the air conditioner CR1.} From the daily distribution of A, it is calculated by the outside air suction relational expression (1). Further, the control means 8 appropriately displays the graph of FIG. 10 on the display means 3. The control means 8 may appropriately display the message "The maximum increase in the suction temperature with respect to the outside air temperature was 7.1 ° C. and an average of 4.6 ° C." on the display means 3. Further, the control means 8 causes the display means 3 to appropriately display a message that "the increase range of the suction temperature with respect to the outside air temperature in the outdoor unit OU1-5 was 10.3 ° C. at the maximum and 6.7 ° C. on average." The same applies to the other outdoor unit OU1.
_{The user can grasp from the graph of FIG. 10 that the suction temperature I 5} of the outdoor unit OU1-5 exceeds 50 ° C. at around 13:00 (1 pm). Generally, when the suction temperature I becomes equal to or higher than a predetermined stop temperature lower limit (for example, 43 ° C.), the air conditioner is stopped in order to suppress its capacity. Therefore, the user can grasp in advance the possibility that the air conditioner CR1 will stop operating due to the influence of SC in midsummer and the cooling will not work. If the control means 8 determines that any of the suction temperatures I _{1 to} I ₅ is equal to or higher than the lower limit of the stop temperature, the control means 8 may display a warning message to the effect that the air conditioner CR1 may stop. good.

[Second case]
Next, a second example relating to the operation of the SC evaluation device 1 will be described.
The second case is the same as the first case except for the capacity and installation status of the air conditioner. The same matters as in the first case will be omitted as appropriate. The second case appropriately has the same modification as the first case.

In the second case, as shown in FIG. 11, 14 outdoor units OU2 (outdoor units OU2-1 to OU2-14) are installed on the roof of a one-story store SH2 ^{with a floor area of 1500 m 2 in Gifu City.} The target is the air conditioner CR2, which is installed facing each other in two rows of seven units. The outdoor units OU2-1 to OU2-14 have a rectangular parallelepiped shape, their suction ports are arranged on the back surface, and the air outlets are arranged on opposite surfaces (horizontal blowing). Therefore, the blown wind OB is blown toward the outdoor units in the other rows. In addition, short circuit SC2 may occur.

First, the control unit 8 obtains in the shop SH2, the outside air temperature _{A n,} outlet temperature _{O n,} and the suction temperature _{I n} (step S1-1).
These temperatures are grasped for each outdoor unit OU2-1 to OU2-14, as shown in the left half of Table 5 below. These temperatures were measured at 11:00 am in August.

Next, the control means 8 obtains the area information LI, the building information BI, and the air conditioner information CI (step S1-2). Here, local information LI is "Gifu", the type of building information BI, in turn uptime "shop", is "from 8 am to 10 pm", the air conditioner information CI _n is the default value is there. The default value of the air conditioner information CI _n (n = 1 to 14) is selected because the model of the air conditioner CR2 (outdoor unit OU2-1 to OU2-14) is not in the air conditioner database CD. As a default value, the average value (cooling capacity 14 kW) of each measured value of capacity and capacity in a plurality of models is used here. A plurality of default values may be prepared depending on the type such as top blowing or side blowing. Further, the default value may be an average value of catalog values in a plurality of models.

Subsequently, the control unit 8 from the outside air temperature _{A n} and the suction temperature _{I n} acquired, outside air inlet relational expression of target store SH2 to _{(1) n,} is calculated respectively for the outdoor unit OU1-1～OU1-10 ( Step S2-1).
Further, the control means 8 determines the daily outside air temperature AD, the monthly outside air temperature AM, and the annual outside air temperature AY (step S2-2).
Further, the control means 8 is based on the outside air suction relational expression (1) _n , from the daily outside air temperature AD, the monthly outside air temperature AM, and the annual outside air temperature AY, the daily suction temperature ID _n , the monthly suction temperature IM _n , and the annual suction temperature IY _n. Is calculated (step S2-3).

_{Further, the control means 8 calculates SCR n} for each of the outdoor units OU2-1 to OU2-10 (step S3).
In addition, the control means 8 calculates the load factor R and the load L related to the air conditioner CR1 (steps S4-1 and S4-2).
Subsequently, the control means 8 calculates the power consumption P and the COP (steps S5-1 and S5-2).
Next, the control means 8 calculates the running cost RC (step S6).

Then, the control means 8 causes the display means 3 to display various types of information (step S7).
That is, the control means 8 displays the SCR in Table 5 above.
Further, the control means 8 displays the COP reduction rate shown in Table 6 below. Further, the control means 8 displays the reduction rate of the power consumption calculated in the same manner as the COP in the same manner as the reduction rate of the COP.
Further, the control means 8 displays various power consumption amounts and the rate of increase in cost shown in Tables 7 to 9 below. Table 7 shows the average value and the highest temperature day (year) for the outdoor units OU2-1 to OU2-5, and Table 8 shows the average value and the highest value for the outdoor units OU2-6 to OU2-10. It is for the temperature day (year), and Table 9 shows the average value for the outdoor units OU2-11 to OU2-14 and the maximum temperature day (year).

Even in the second case, the user can specifically grasp the degree and cost of SC in the air conditioner CR2 (outdoor unit OU2) by referring to the display of various information.
Further, if the user grasps the degree and cost of SC before and after the countermeasure for SC, the effect of the countermeasure can be grasped.
Moreover, to calculate the degree and cost of SC, bring the SC analyzer 2, the outside air temperature sensor AS, the blowout temperature sensor OS, and the suction temperature sensor IS to the installation location of the air conditioner CR2, and bring the outside air temperature A and the blowout temperature O. , And the suction temperature I can be easily measured only once.

Further, even if the measurement of the outside air temperature A, the blowing temperature O, and the suction temperature I is other than midsummer, the control means 8 can predict that the air conditioner CR1 will stop due to the rise of the suction temperature I.
FIG. 12 is a graph showing the daily distribution of the outside air temperature A and the daily distribution of the suction temperatures I _{1 to} I _{5 of the outdoor units OU2-1 to OU2-5 on the highest temperature day.}
The control means 8 acquires the daily distribution of the outside air temperature A related to the maximum temperature day from the outside air temperature information server AIS, and obtains the daily distribution of the suction temperatures I _{1 to} I _{5 within the operating time of the air conditioner CR1.} From the daily distribution of A, it is calculated by the outside air suction relational expression (1). Further, the control means 8 appropriately displays the graph of FIG. 10 on the display means 3. The control means 8 may appropriately display the message "The maximum increase in the suction temperature with respect to the outside air temperature was 8.2 ° C. and an average of 5.8 ° C." on the display means 3. Further, the control means 8 causes the display means 3 to appropriately display a message that "the increase range of the suction temperature with respect to the outside air temperature in the outdoor unit OU2-1 was 10.4 ° C. at the maximum and 7.3 ° C. on average." The same applies to the other outdoor unit OU2.
The user, at the suction temperature _{I 5} in the outdoor unit OU2-1 14 etc. to approach the 50 ° C. to about (2 pm), it is possible grasped by the graph or the like in FIG. 12. Therefore, the user can grasp in advance the possibility that the air conditioner CR2 will stop operating due to the influence of SC in midsummer and the cooling will not work.

[Action effect, etc.]
More SC evaluation device 1 includes an input for receiving an input of the suction temperature I _n is the outside air temperature A _n, and the outdoor air temperature sucked to the outdoor unit OU is the outside air temperature at the installation location of the air conditioner CR to be evaluated a means 4, the outside air temperature a _n and the suction temperature I _n, a control unit 8 for calculating the outside air temperature a _n and the suction temperature I _n the outside air inlet relation is a relation of (1) _n in the air conditioner CR, Period outside air temperature (daily outside air temperature AD, monthly outside air temperature AM,) which is a set of multiple outside air temperatures within the past predetermined period (days, months, years) in the area (regional information LI) to which the air conditioner CR is installed. The communication means 7 for receiving the annual outside air temperature AY) from the outside air temperature information server AIS in which the outside air temperature A is stored is provided. The control means 8 sequentially applies the period outside air temperature to the outside air suction relational expression (1), and the period suction temperature (daily suction temperature ID _n , monthly suction temperature IM _n , which is a set of a plurality of suction temperatures I within a predetermined period, Calculate the annual suction temperature IY _n).
Therefore, the SC evaluation device 1 is provided in which the suction temperature over a predetermined period is referred to and not only the presence or absence of SC generation but also the degree can be known. Further, since the air conditioner CR1, CR2 ambient temperature of current state at the installation location of the A _n and the suction temperature I _n is analyzed for SC If a short time has been entered measurement, time and effort required to analyze smaller The SC evaluation device 1 is provided.

The input unit 4 receives an input of air temperature O _n which is the temperature of the exhaust gas out of the outdoor unit OU, the control unit 8, blowing showing the relationship between the load factor R of the outlet temperature O _n and the air conditioner CR It can be referred to the load factor relationship, by applying a blowing temperature O _n the outlet load factor equation to calculate the load factor. Therefore, the SC evaluation device 1 capable of performing analysis in consideration of the load factor R is provided.
Further, the control means 8 calculates the power consumption P and COP related to the air conditioner CR from the period suction temperature and the load factor R. Therefore, the increase in power consumption P and the decrease in capacity based on the generation or degree of SC are specifically evaluated.
In addition, the control means 8 calculates the running cost RC related to the air conditioners CR1 and CR2 from the power consumption P, the charge unit price UP which is the unit price of the electricity charge, and the evaluation period ET. Therefore, the increase in running cost RC based on the occurrence or degree of SC is specifically evaluated.

[Change examples, etc.]
The form of the present invention is not limited to the above-mentioned form and modified examples, and further modified examples as shown below are appropriately provided.
Although the above-described embodiment is mainly described for cooling, SC can be evaluated by the SC evaluation device 1 for heating in the same manner as in the case of cooling.

1 ... Short circuit evaluation device for air conditioner (SC evaluation device), (1) ... Outside air suction relational expression, 4 ... Input means, 7 ... Communication means, 8 ... Control means, A ... Outside air temperature, AD ... daily outside air temperature (period outside air temperature), AIS ... outside air temperature information server, AM ... monthly outside air temperature (period outside air temperature), AY ... annual outside air temperature (period outside air temperature), COP ... COP, CR1 , CR2 ... Air conditioner, ET ... Evaluation period, I ... Suction temperature, LI ... Regional information, O ... Blow-out temperature, OU1, OU2 ... Outdoor unit, P ... Power consumption, R ... Load factor , RC ... Running cost, UP ... Unit price.

Claims (4)

An input means that accepts inputs of the outside air temperature, which is the temperature of the outside air at the installation location of the air conditioner to be evaluated, and the suction temperature, which is the temperature of the outside air sucked into the outdoor unit.
A control means for calculating an outside air suction relational expression, which is a relational expression between the outside air temperature and the suction temperature in the air conditioner, from the outside air temperature and the suction temperature.
A communication means for receiving a period outside air temperature, which is a set of a plurality of outside air temperatures within a predetermined period in the past in the area belonging to the installation location, from an outside air temperature information server in which the outside air temperature is accumulated.
Is equipped with
The control means sequentially applies the period outside air temperature to the outside air suction relational expression to calculate the period suction temperature, which is a set of a plurality of suction temperatures within the predetermined period, and evaluates a short circuit of an air conditioner. apparatus. The input means receives an input of the blowout temperature, which is the temperature of the exhaust gas emitted from the outdoor unit, and receives the input.
The control means can refer to an outlet load factor relational expression showing the relationship between the outlet temperature and the load factor of the air conditioner, and applies the outlet temperature to the outlet load factor relational expression to calculate the load factor. The short circuit evaluation device for an air conditioner according to claim 1. The short circuit evaluation device for an air conditioner according to claim 2, wherein the control means calculates at least one of the power consumption and the COP of the air conditioner from the period suction temperature and the load factor. The short circuit of an air conditioner according to claim 3, wherein the control means calculates a running cost related to the air conditioner from the power consumption, a charge unit price which is a unit price of the electric power charge, and an evaluation period. Evaluation device.

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