Method for calculating PMV of air conditioning system

• US 5,674,007 A
• Filed: 03/09/1995
• Issued: 10/07/1997
• Est. Priority Date: 03/09/1994
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Bu, Jong Uk, Shim, Young Cho
• Primary Examiner(s): GUTIERREZ, DIEGO F
• Application Number:
  US08/401,208
• Time in Patent Office: 943 Days
• Field of Search: 374/109, 374/45, 364/557, 364/505, 236/91 C
• US Class Current: 374/45
• 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: G01W 1/17 Catathermometers for measuring "cooling value" related either to weather conditions or to comfort of other human environment
• CPC Class Codes: G05D 23/1931 to control the temperature of one space

Abstract

A method for calculating a PMV for an air conditioning system having a body sensor and a temperature sensor includes the steps of sensing a thermal change a human body senses due to room air circulation using the body sensor, and converting the sensed thermal change into a digital value, sensing a room temperature using the temperature sensor, and converting the sensed room temperature into a digital value, assigning parameters according to human bodily activities and amount of clothes a man wears classified by seasons and times, and calculating a PMV by computing the value of thermal change converted into a digital value, the value of room temperature converted into a digital value, and the parameters.

Claims

1. A method for calculating a PMV for an air-conditioning system having a body sensor and a temperature sensor, the method comprising the steps of:

sensing a thermal change a human body senses due to room air circulation using the body sensor, and converting the sensed thermal change into a digital value;

sensing a room temperature using the temperature sensor, and converting the sensed room temperature into a digital value;

assigning parameters according to human bodily activities and amount of clothes being worn classified by seasons and times; and

calculating a PMV using the value of thermal change converted into a digital value, the value of room temperature converted into a digital value, and the parameters, according to the following equation;

space="preserve" listing-type="equation">PMV=(a.sub.1 M+b.sub.1 C+c.sub.1)ta-(a.sub.2 M+b.sub.2 C+c.sub.2)S/100-K

where,

M;

metabolism,

C;

resistivity coefficient of clothes (Clo) value,

ta;

room temperature,

S is the output of the body sensor, and

a, b, c, and K are constants.