Arrangement for controlling room temperature

• US 4,293,028 A
• Filed: 10/09/1979
• Issued: 10/06/1981
• Est. Priority Date: 10/09/1978
• Status: Expired due to Term

• Current Assignee: Centra-Burkle GmbH & Company
• Original Assignee: Centra-Burkle GmbH & Company
• Inventors: Knoll, Alois
• Primary Examiner(s): Wayner, William E.
• Application Number:
  US06/082,494
• Time in Patent Office: 728 Days
• Field of Search: 236/46 R, 236/91 R, 165/12, 165/22
• US Class Current: 165/239
• CPC Class Codes: F24F 11/67 Switching between heating and cooling modes
• CPC Class Codes: F24F 11/83 by controlling the supply of heat-exchange fluids to heat-exchangers
• CPC Class Codes: F24F 11/84 using valves
• CPC Class Codes: G05D 23/1904 variable in time
• CPC Class Codes: G05D 23/20 with sensing elements having variation of electric or magnetic properties with change of temperature G05D23/13 takes precedence

Abstract

An arrangement for controlling room temperature in conjunction with a heating or air conditioning system which operates throughout successive and uniform periods of time, each period of time being divided into a first time interval and a second time interval and including a first computer for a rapid heating or rapid cooling curve and a second computer for computing an actual value room temperature curve in accordance with input data including outside weather conditions, building value etc., the heating or air conditioning system being switched off at the beginning of the second time interval and switched on at a predetermined instant during the second time interval thereby effecting a substantial savings in energy.

Claims

1. An arrangement in the form of an electrical circuit or the like for controlling in common the room temperature of a group of rooms intended for human occupancy in a building or the like in accordance with the weather including the outside temperature by controlling the output of a heat transfer system, such as a heating system or a cooling system, for said group of rooms, including:

timing means for defining a series of predetermined first and second time intervals, each of said second time intervals beginning at the end of a first time interval and ending at the beginning of the next successive first time interval;

first system control means for controlling the output of said heat transfer system, i.e. the transfer of heat energy with respect to said group of rooms, during said first time intervals to maintain a normal room temperature value;

system shut-off means for reducing the output of said heat transfer system to a minimum value at the beginning of said second time interval;

maximum output means for increasing the output of said heat transfer means to a maximum value before the termination of said second time interval to effect a rapid transfer of heat energy with respect to said group of rooms, whereby as a result of the rapid heat transfer, the normal value for the room temperature is at least substantially attained toward the end of said second time interval;

first computer means for computing the change to be expected in the room temperature as a result of said rapid heat transfer as a rapid heat transfer curve, taking into consideration building values, values of said heat transfer system and the instantaneous weather,; and

second computer means for computing an actual value curve (T_RJ) of the room temperature (TR) from the beginning of each second time interval until the beginning of said rapid heat transfer, taking into consideration the building values, the values of said heat transfer system and the instantanteous weather;

wherein said maximum output means includes first comparator means for initiating said rapid heat transfer whenever the actual value curve at that time attains the computed rapid heat transfer curve.

2. An arrangement in accordance with claim 1, including:

second system control means for controlling the output of said heat transfer system to maintain a predetermined extreme value of the room temperature in accordance with the instantaneous weather;

first switching means for activating said second system control means whenever the computed actual value of the room temperature attains this extreme value; and

second comparator means for initiating said rapid heat transfer whenever said rapid heat transfer curve attains said extreme value.

3. An arrangement in accordance with claim 2, which further comprises:

temperature determining means for determining an outdoor temperature value; and

second switching means for activating said second system control means only when, first, said extreme value is intermediate said outdoor temperature value and the normal room temperature value, and, secondly, the difference between the outdoor temperature value and the extreme value exceeds a predetermined amount.

4. An arrangement in accordance with claim 3, wherein outdoor temperature value is an said average value for the outside temperature formed over a predetermined period of time, up to 24, preceding the particular instantaneous time.

5. An arrangement in accordance with claim 3, wherein said outdoor temperature value is an instantaneous value for the outside temperature.

6. An arrangement in accordance with claim 3, wherein said heat transfer system is a heating system, said rapid heat transfer is a rapid heating, said rapid heat transfer curve is a rapid heating transfer curve, said extreme value for the room temperature is a minimum value, whereby said second system control means operates only when said outdoor temperature value is below said extreme value by a predetermined amount.

7. An arrangement in accordance with claim 3, wherein said heat transfer system is a cooling system, said rapid heat transfer is a rapid cooling, said rapid heat transfer curve is a rapid cooling curve, extreme value for the room temperature is a maximum value, whereby said second system control means operates only when said outdoor temperature value is above said extreme value by a predetermined amount.

8. An arrangement in accordance with claim 2, wherein said heat transfer system is a heating system, said predetermined extreme value for the room temperature is a minimum value, said rapid heat transfer is a rapid heating, and said rapid heat transfer curve is a rapid heating curve.

9. An arrangement in accordance with claim 2, wherein said heat transfer system is a cooling system, said predetermined extreme value for the room temperature is a maximum value, said rapid heat transfer is a rapid cooling, and said rapid heat transfer curve is a rapid cooling curve.

10. An arrangement in accordance with claim 1, wherein during said second time intervals, the switch-on time (t_x) of said rapid heat transfer required for the instantanteously computed actual value (T_RJ) of the room temperature is continuously computed by said first computer means and said rapid heat transfer is initiated by said first comparator means whenever the computed switch-on time (t_x) coincides with the instantaneous time (t).

11. An arrangement in accordance with claim 1, wherein said group of rooms comprise an apartment.

12. An arrangement in accordance with claim 1, wherein said group of rooms comprise an entire building.

13. An arrangement in accordance with claim 1, wherein said group of rooms comprise one zone in a building.

14. An arrangement in accordance with claim 1, wherein the length of said second time interval is a maximum of 20 hours.

15. An arrangement in accordance with claim 1, wherein said normal room temperature is a constant temperature.

16. An arrangement in accordance with claim 1, wherein said normal room temperature is determined in accordance with the weather.

17. An arrangement in accordance with claim 1, wherein said arrangement is an arrangement for the open-loop control of said heat transfer system.

18. An arrangement in accordance with claim 1, wherein said arrangement is an arrangement for the closed-loop control of said heat transfer system.

19. An arrangement in accordance with claim 1, wherein during said second time intervals, the switch-on time (t_x) of said rapid heat transfer required for the instantaneously computed actual value (T_RJ) of the room temperature is periodically computed by said first computer means, and said rapid heat transfer is initiated by said comparator means whenever the instantaneous time has exceeded this switch-on time (t_x) since the last comparison thereof by the comparator means.

20. An arrangement in accordance with claims 1, 3 or 19, wherein said heat transfer system is a heating system, said rapid heat transfer is a rapid heating, and said rapid heat transfer curve is a rapid heating curve.

21. An arrangement in accordance with claims 1, 3, or 19, wherein said heat transfer system is a cooling system, said rapid heat transfer is a rapid cooling, and said rapid heat transfer curve is a rapid cooling curve.