Temperature control method for a heating/cooling system

• US 5,819,845 A
• Filed: 11/21/1995
• Issued: 10/13/1998
• Est. Priority Date: 11/24/1990
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ryu, Byung-Joo, Chun, Yun-Bong
• Primary Examiner(s): Ford, John K.
• Application Number:
  US08/561,192
• Time in Patent Office: 1,057 Days
• Field of Search: 165/254, 165/259, 165/42, 165/43, 236/78 D, 236/11, 364/192
• US Class Current: 165/254
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: G05B 11/42 for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
• CPC Class Codes: G05D 23/1902 characterised by the use of a variable reference value
• CPC Class Codes: G05D 23/1917 using digital means

Abstract

A temperature control method and apparatus therefor controls an air temperature in a room by determining an error temperature between a set temperature and an actual room temperature. An auxiliary reference calorie is initially set as a previous state calorie value, an error calorie associated with the detected error temperature is determined by PID operation and a current calorie value in determined by adding or subtracting the previous state calorie value to/from error calorie, and the room temperature is brought to the set temperature using the current calorie value.

Claims

1. A method of controlling a heating/cooling system, comprising the steps of:

determining whether a key signal indicative of a room temperature changing speed is input to a controller from a keyboard, said key signal corresponding to a desired speed for changing a room temperature;

setting proportional integral differential coefficients corresponding to said key signal, when said determining step determines said key signal has been input, for enabling system loads to be operated for a predetermined time period;

determining an error temperature detecting time;

detecting a difference between a set temperature and a current room temperature when the error temperature detecting time has elapsed;

determining error calories corresponding to said difference in accordance with a proportional integral differential operation utilizing said proportional integral differential coefficients;

storing said error calories and adding/subtracting said error calories to/from a previous calorie to determine a current calorie; and

,

controlling system loads to adjust said room temperature to said set temperature in accordance with said current calorie.

2. The method of controlling a heating/cooling system as claimed in claim 1, further comprising:

setting control parameters for system loads after storing said error calories.

3. A method of controlling a heating/cooling system, comprising the steps of:

providing at a first time a set temperature of an area to be temperature regulated;

detecting a current temperature of said area at a second time;

determining an error calorie value in dependence upon a proportional integral differential operation, said error caloric value corresponding to an amount of energy required to change the current temperature of the area to the set temperature; and

initiating one of operations for warming and cooling said area in accordance with the error calorie value.

4. The method of claim 3, further comprising the steps of:

determining whether a key signal indicative of a room temperature changing speed is input to a controller from a keyboard, said key signal corresponding to a desired speed for changing a room temperature;

providing, when it is determined that said key signal has been input, predetermined system load control coefficients, corresponding to proportional integral differential coefficients, for operating system loads dependent upon a room temperature changing speed;

determining an error temperature as a difference between said current temperature and said set temperature when an error detecting time has elapsed, wherein said error caloric value corresponds to said error temperature.

5. The method of claim 4, wherein the step of providing predetermined system load control coefficient comprises:

setting low speed load control coefficients corresponding to operating system loads for compensating for the error caloric value when said room temperature changing speed is a low speed;

setting medium speed load control coefficients corresponding to operating system loads for compensating for the error calorie value when said room temperature changing speed is a medium speed;

setting high speed load control coefficients corresponding to operating system loads for compensating for the error calorie value when said room temperature changing speed is a high speed.

6. A method of controlling a heating/cooling system comprising a microprocessor for controlling the system, means for user interface with the microprocessor, a display of information processed in the microprocessor during operation of the system, sensor means for sensing temperature of an area to be temperature regulated, and means for heating/cooling said area, the method comprising the steps of:

providing at a first time a set temperature of an area to be temperature regulated;

detecting a current temperature of said area at a second time;

determining a temperature difference by comparing the set temperature and the current temperature;

determining an error calorie value in dependence upon a proportional integral differential operation utilizing said temperature difference, said error calorie value corresponding to an amount of energy required to change the current temperature of the area to the set temperature; and

providing a selected operation of one of warming and cooling said area in accordance with the error caloric value.

7. The method of claim 6, further comprising the steps of:

determining whether a key signal indicative of a room temperature changing speed is input to a controller from a keyboard, said key signal corresponding to a desired speed for changing a room temperature,

providing, when it is determined that said key signal has been input, predetermined system load control coefficients, corresponding to proportional integral differential coefficients, for operating system loads dependent upon a room temperature changing speed; and

determining the temperature difference when an error detecting time has elapsed.

8. The method of claim 7, said step of providing predetermined system load coefficients comprising the steps of:

setting low speed load control coefficients corresponding to operating system loads when compensating for the error calorie value at a low speed;

setting medium speed load control coefficients corresponding to operating system loads when compensating for the error caloric value at a medium speed;

setting high speed load control coefficients corresponding to operating system loads when compensating for the error caloric value at a high speed.

9. A heating/cooling system comprising:

a proportional integral differential controller responding to differences between a current room temperature and a target temperature;

means for enabling user interaction with the controller;

sensor means for detecting said current room temperature;

means controlled by the controller, for circulating air in a room exhibiting said current room temperature;

a blower motor controlled by the controller and connected to a burner;

a pump controlled by the controller and connected to the burner; and

wherein said controller;

determines whether a key signal for a desired room temperature changing speed is input via said means for enabling user interaction with the controller;

sets coefficients for a proportional integral differential operation, said coefficients corresponding to the desired room temperature changing speed, when said key signal is input, and enabling system loads to be operated for a predetermined time period;

sets an error detecting time;

detects a difference between the target temperature and the current room temperature when the error detecting time has elapsed;

determines error calories corresponding to said difference in accordance with the proportional integral differential operation;

stores said error calories and adds or subtracts said error calories to or from a previous calorie to determine a current calorie; and

,

controls system loads to adjust said room temperature to said target temperature in accordance with said current calorie.