Temperature characteristic evaluation method

Abstract

A temperature characteristic evaluation method includes the steps of acquiring temperature data, ambient temperature data, and internal temperature data are acquired. By changing at least one of the set temperature and the ambient temperature, a plurality of combinations of the set temperature data, the ambient temperature data, and the internal temperature data is obtained as a plurality of temperature data groups. A difference between the ambient temperature data and the set temperature data in each of the plurality of temperature data groups is calculated as the first difference. A difference between the internal temperature data and the set temperature data is calculated as the second difference. The combinations of the first and second differences are obtained as difference groups. The plurality of difference groups for the plurality of temperature data groups is approximated in a linear function, and the linear function is obtained as a temperature function.

What is claimed is: 
     
         1 . A temperature characteristic evaluation method for evaluating temperature characteristics in an internal space of a climate chamber which operates to maintain a temperature in the internal space in a predetermined set temperature, the temperature characteristic evaluation method comprising the steps of:
 (1) obtaining a set temperature of the climate chamber, which is set from a controller built in the climate chamber, as set temperature data by a computer, acquiring ambient temperature data by the computer based on an ambient temperature, which is a temperature inside a space where the climate chamber is placed, measured by a first temperature sensor installed inside the space, and acquiring internal temperature data by the computer based on an internal temperature of the internal space measured by a second temperature sensor installed inside the space;   (2) acquiring a plurality of combinations of the set temperature data, the ambient temperature data, and the internal temperature data as a plurality of temperature data groups in the computer by acquiring set temperature data, ambient temperature data, and internal temperature data in a similar manner as the step of (1) by changing at least one of the set temperature and the ambient temperature;   (3) obtaining a differential group in each of the plurality of temperature data groups by calculating a difference between the ambient temperature data and the set temperature data as a first difference, calculating a difference between the internal temperature data and the set temperature data as a second difference, and combining the calculated first and second differences by the computer;   (4) approximating a plurality of differential groups for the plurality of temperature data groups by a linear function and obtaining the linear function as a temperature function by the computer; and   (5) performing an evaluation related to the temperature characteristics of the internal space of the climate chamber by using the temperature function.   
     
     
         2 . The temperature characteristic evaluation method according to  claim 1 , further comprising the steps of: (6) calculating an inclination coefficient of the temperature function by the computer,
 wherein the step of (5) performing the evaluation includes a step of setting an allowable coefficient range for the inclination coefficient of the temperature function, and   a step of judging whether or not the inclination coefficient of the temperature function is within the allowable coefficient range.   
     
     
         3 . The temperature characteristic evaluation method according to  claim 1 , wherein the step of (5) performing the evaluation includes a step of setting an allowable range for a second difference as a second differential allowable range;
 a step of obtaining a second difference by the computer; and   a step of calculating a margin level of the second difference at an upper limit value or a lower limit value of the second differential allowable range.   
     
     
         4 . The temperature characteristic evaluation method according to  claim 3 , wherein the step of obtaining the second difference includes a step of acquiring ambient temperature data based on an ambient temperature measured by the first temperature sensor at a first point of time after the temperature function is obtained and acquiring set temperature data,
 a step of calculating a first difference at the first point of time based on the acquired ambient temperature data and the acquired set temperature data at the first point of time, and   a step of calculating a second difference at the first point of time based on the first difference at the first point of time and the temperature function.   
     
     
         5 . The temperature characteristic evaluation method according to  claim 3 , further comprising the steps of: (7) calculating an upper limit value and a lower limit value of a first differential allowable range, which is an allowable range of the first difference, by substituting an upper limit value and a lower limit value of the second differential allowable range to the second difference of the temperature function by the computer; and
 (8) calculating an upper limit value and a lower limit value of an allowable range of the ambient temperature data by the computer based on the upper limit value and the lower limit value of the first differential allowable range and the set temperature data.   
     
     
         6 . The temperature characteristic evaluation method according to  claim 1 , wherein the climate chamber includes an air-conditioning part, a blowout port blowing air conditioned by the air-conditioning part into the internal space, and a suction port suctioning air of the internal space into the air-conditioning part, and
 wherein the set temperature is a temperature of the air of the blowout port or the suction port.   
     
     
         7 . A temperature characteristic evaluation method for evaluating temperature characteristics in an internal space of a climate chamber which operates to maintain a temperature in the internal space in a predetermined set temperature, the temperature characteristic evaluation method comprising the steps of:
 (1) obtaining a set temperature of the climate chamber, which is set from a controller built in the climate chamber, as set temperature data by a computer, acquiring ambient temperature data by the computer based on an ambient temperature, which is a temperature inside a space where the climate chamber is placed, measured by a temperature sensor installed inside the space, and acquiring internal temperature data by the computer based on internal temperatures of the internal space in a plurality of positions respectively measured by a plurality of temperature sensors;   (2) acquiring a plurality of combinations of the set temperature data, the ambient temperature data, and the plurality of internal temperature data in the computer as a plurality of temperature data groups in the plurality of positions respectively by acquiring set temperature data, ambient temperature data, and a plurality of internal temperature data in a similar manner as the step of (1) by changing at least one of the set temperature and the ambient temperature;   (3) obtaining a differential group in each of the plurality of temperature data groups by calculating a difference between the ambient temperature data and the set temperature data as a first difference, calculating a difference between the plurality of internal temperature data and the set temperature data as a second difference in each of the plurality of positions, and combining the calculated first and second differences by the computer;   (4) approximating a plurality of differential groups for the plurality of temperature data groups by a linear function in each of the plurality of positions and obtaining a plurality of linear functions as temperature functions by the computer; and   (5) performing an evaluation related to the temperature characteristics of the internal space of the climate chamber by using the plurality of temperature functions.   
     
     
         8 . The temperature characteristic evaluation method according to  claim 7 , further comprising the steps: (6) calculating inclination coefficients of the plurality of temperature functions by the computer,
 wherein the step of (5) performing the evaluation includes a step of setting an allowable coefficient range for the inclination coefficients of the plurality of temperature functions, and   a step of judging whether or not the inclination coefficients of the plurality of temperature functions are within the allowable coefficient range.   
     
     
         9 . The temperature characteristic evaluation method according to  claim 7 , wherein the step of (5) performing the evaluation includes a step of setting an allowable range for a second difference as a second differential allowable range;
 a step of obtaining a second difference in each of the plurality of positions by the computer; and   a step of calculating a margin level of the second difference, which is obtained in the step of obtaining, at an upper limit value or a lower limit value of the second differential allowable range.   
     
     
         10 . The temperature characteristic evaluation method according to  claim 9 , wherein the step of obtaining the second difference includes a step of acquiring ambient temperature data based on an ambient temperature measured by the first temperature sensor at a first point of time after the plurality of temperature functions is obtained and acquiring set temperature data,
 a step of calculating a first difference at the first point of time based on the acquired ambient temperature data and the acquired set temperature data at the first point of time, and   a step of calculating a plurality of second differences at the first point of time based on the first difference at the first point of time and the plurality of temperature functions.   
     
     
         11 . The temperature characteristic evaluation method according to  claim 9 , further comprising the steps of: (7) calculating an upper limit value and a lower limit value of a plurality of the first differential allowable ranges, which are an allowable range of the first difference, by substituting an upper limit value and a lower limit value of the second differential allowable range to the second difference of the plurality of temperature functions by the computer; and
 (8) calculating an upper limit value and a lower limit value of an allowable range of the ambient temperature data by the computer based on the upper limit value and the lower limit value of the plurality of the first differential allowable ranges and the set temperature data.   
     
     
         12 . The temperature characteristic evaluation method according to  claim 7 , wherein the climate chamber includes an air-conditioning part, a blowout port blowing air conditioned by the air-conditioning part into the internal space, and a suction port suctioning air of the internal space into the air-conditioning part, and
 wherein the set temperature is a temperature of the air of the blowout port or the suction port.   
     
     
         13 . A temperature characteristic evaluation method for evaluating temperature characteristics in an internal space of a climate chamber which operates to maintain a temperature in the internal space in a predetermined set temperature, the temperature characteristic evaluation method comprising the steps of:
 (1) obtaining a set temperature of the climate chamber, which is set from a controller built in the climate chamber, as set temperature data by a computer, acquiring ambient temperature data by the computer based on an ambient temperature, which is a temperature inside a space where the climate chamber is placed, measured by a temperature sensor installed inside the space, and acquiring internal temperature data by the computer based on internal temperatures of the internal space in a plurality of positions respectively measured by a plurality of temperature sensors;   (2) acquiring a plurality of combinations of the set temperature data, the ambient temperature data, and the plurality of internal temperature data in the computer as a plurality of temperature data groups in the plurality of positions respectively by acquiring set temperature data, ambient temperature data, and internal temperature data in a similar manner as the step of (1) by changing at least one of the set temperature and the ambient temperature;   (3) obtaining a differential group in each of the plurality of temperature data groups by calculating a difference between the ambient temperature data and the set temperature data as a first difference, calculating a difference between the plurality of internal temperature data and the set temperature data as a second difference in each of the plurality of positions, and combining the calculated first and second differences by the computer;   (4) approximating a plurality of differential groups for the plurality of temperature data groups by a linear function in each of the plurality of positions and obtaining a plurality of linear functions as temperature functions by the computer;   (5) setting an allowable range for a second difference as a second differential allowable range;   (6) obtaining second differences in the plurality of positions at a second point of time after the plurality of temperature functions is obtained by the computer;   (7) calculating margin levels of the second difference with respect to an upper limit value and a lower limit value of the second differential allowable range in the plurality of points; and   (8) specifying a position having a margin level which is the maximum value or the minimum value among the margin levels of the second differential value in the plurality of positions.   
     
     
         14 . The temperature characteristic evaluation method according to  claim 13 , wherein the step of (6) obtaining the second differences at the second point of time includes a step of acquiring ambient temperature data by measuring an ambient temperature at the second point of time by the temperature sensor installed inside the space where the climate chamber is placed and acquiring set temperature data, and
 a step of calculating a first difference at the second point of time based on the ambient temperature data acquired at the second point of time and the acquired set temperature data, and   a step of calculating a plurality of second differences at the second point of time based on the first difference at the second point of time and the plurality of temperature functions.   
     
     
         15 . The temperature characteristic evaluation method according to  claim 13 , wherein the climate chamber includes an air-conditioning part, a blowout port blowing air conditioned by the air-conditioning part into the internal space, and a suction port suctioning air of the internal space into the air-conditioning part, and
 wherein the set temperature is a temperature of the air of the blowout port or the suction port.