Temperature control system for air conditioning system

• US 4,830,095 A
• Filed: 03/18/1988
• Issued: 05/16/1989
• Est. Priority Date: 03/18/1988
• Status: Expired due to Fees

• Current Assignee: Dennis M. Friend
• Original Assignee: Dennis M. Friend
• Inventors: Friend, Dennis M.
• Primary Examiner(s): Davis, Jr., Albert W.
• Assistant Examiner(s): Ford, John K.
• Application Number:
  US07/170,144
• Time in Patent Office: 424 Days
• Field of Search: 165/22, 165/25, 236/49 D, 236/1 B, 236/1 C
• US Class Current: 165/208
• CPC Class Codes: F24F 11/74 for controlling air flow rate or air velocity
• CPC Class Codes: F24F 3/044 Systems in which all treatment is given in the central station, i.e. all-air systems
• CPC Class Codes: G05D 23/1934 each space being provided with one sensor acting on one or more control means

Abstract

A temperature control system for an air conditioning system that services plural zones provides priority of one or more selected zones of the conditioned air flow relative to the other unselected zones. Priority is achieved by closing those dampers associated with the unselected zones to direct the conditioned air flow into the selected zones. The temperature control system also provides for fail-safe operation by utilizing dampers biased in the open position and by preventing all dampers from being closed at the same time when conditioned air is flowing.

Claims

1. An electrical temperature control system for an air conditioning system servicing plural zones, said air conditioning system having conditioning means for producing conditioned air, comprising:

a. each of said zones having temperature sense means for sensing the temperature and for detecting a need for conditioned air in the respective zone;

b. each of said zones having an associated damper means for regulating the amount of conditioned air flowing from said conditioning means into the respective zone;

each of said damper means operable to move between a closed position wherein conditioned air is prevented from entering said respective zone and an open position wherein conditioned air is allowed to enter said respective zone;

c. a control unit for controlling the activation of said conditioning means and the production of conditioned air and for controlling the position of each of said damper means, said control unit being responsive to each of said temperature sense means so as to activate said conditioning means when a need for conditioned air is detected by any of said temperature sense means;

said control unit being connected to each of said temperature sense means, each of said damper means, and said conditioning means;

d. said control unit comprises select means for selecting the priority of one or more of said zones to form selected zones, the other of said zones being unselected zones, said selected zones maintaining their priority status over unselected zones regardless of which zones need conditioned air;

e. said control unit also comprises priority means for preempting the flow of conditioned air from said unselected zones and supplying the air flow to said selected zones whenever said selected zones need air, said priority means providing said selected zones priority of conditioned air flow over said unselected other zones when both selected zones and unselected zones need conditioned air by causing the respective damper means associated with said unselected zones to be in the closed position thereby preventing air flow into said unselected zones while causing the respective damper means associated with said selected zones to be in the open position thereby allowing air flow into aid selected zones;

f. said priority means providing conditioned air flow to said unselected zones whenever said unselected zones need conditioned air and said selected zones do not need conditioned air by causing the respective damper means associated with said unselected zones to be in the open position and the respective damper means associated with the selected zones to be in the closed position.

2. The temperature control system of claim 1, wherein each of said damper means is biased in the open position and said control unit operates the damper means out of the open position to move to the closed position.

3. The temperature control system of claim 2, wherein said damper means are interlocked together by said control unit so that when said conditioning means is operating, at least one damper means is in the open position.

4. The temperature control system of claim 2 wherein:

a. said priority means comprises plural switch means, each of said switch means being connected with a respective damper means and a power supply, said priority means being connected with each of said temperature sense means said respective switch means being responsive to said respective temperature sense means, wherein when a respective switch means is closed the associated damper means is moved to the closed position;

b. said priority means controlling said respective switch means so that when the selected zones require conditioned air the respective switch means connected with the respective damper means in the unselected zones are closed so as to move said respective damper means in the unselected zones to the closed position and the respective switch means connected with the respective damper means in the selected zones are opened so as to maintain the respective damper means in the selected zones in the open position;

c. said priority means controlling said respective switch means so that when the unselected zones require conditioned air and the selected zones do not require conditioned air the respective switch means connected with the respective damper means in the selected zones are closed so as to move said respective damper means in the selected zones to the closed position and said respective damper means in the unselected zones are left in the open position;

d. said priority means comprising a bypass switch means connected in parallel with each of said switch means connected with a damper means in an unselected zone, said priority means controlling said respective bypass switch means so that when selected zones and unselected zones require conditioned air at the same time, the respective bypass switch means is closed so as to move said respective damper means in the unselected zones to the closed position.

5. The temperature control system of claim 4 wherein said select means can be changed alternately between an on mode and an off mode, wherein when said select means is in its on mode priority of one or more zones is selected, when said select means is in its off mode all of said zones have equal priority of conditioned air flow.

6. The temperature control system of claim 1 wherein said select means can be changed alternately between an on mode and an off mode, wherein when said select means is in its on mode priority of one or more zones is selected, when said select means is in its off mode all of said zones have equal priority of conditioned air flow.

7. The temperature control system of claim 1 wherein:

a. said air conditioning system services at least three zones;

b. said select means allows the selection from said selected zones of a first priority zone and a second priority zone, said third zone being unselected;

c. said priority means providing for the first priority zone to receive conditioned air over the second priority zone and the unselected zone when all zones need conditioned air;

said priority means providing for the second priority zone to receive conditioned air over the unselected zone when both the second priority zone and the unselected zone need conditioned air and the first priority zone does not need conditioned air.

8. The temperature control system of claim 7 wherein:

a. each of said damper means is biased in the open position and said control unit operates the damper means out of the open position to move to the closed position;

b. said priority means comprises plural switch means, each of said switch means being connected with a respective damper means and a power supply, said priority means being connected with each of said temperature sense means, said respective switch means being responsive to said respective temperature sense means, wherein when a respective switch means is closed the associated damper means is moved to the closed position;

c. said priority means controlling said respective switch means so that when the selected zones require conditioned air the respective switch means connected with the respective damper means in the unselected zones are closed so as to move said respective damper means in the unselected zones to the closed position and the respective switch means connected with the respective damper means in the selected zones are opened so as to maintain the respective damper means in the selected zones in the open position;

d. said priority means controlling said respective switch means so that when the unselected zones require conditioned air and the selected zones do not require conditioned air the respective switch means connected with the respective damper means in the selected zones are closed so as to move said respective damper means in the selected zones to the closed position and said respective damper means in the unselected zones are left in the open position;

e. said priority means comprising a bypass switch means connected in parallel with each of said switch means connected with a damper means in an unselected zone, said priority means controlling said respective bypass switch means so that when selected zones and unselected zones require conditioned air at the same time, the respective bypass switch means is closed so as to move said respective damper means in the unselected zones to the closed position.

9. The temperature control system of claim 88 wherein said priority means comprises first and second modules with each module serving groups of zones and containing said respective switch means, said first module containing switch means serving a first zone and a second zone, said second module containing switch means serving a third zone and the combination of said first and second zones, wherein said modularization allows for ease of connecting said plural zones to said control unit.

10. An electrical temperature control system for an air conditioning system servicing two zones, said air conditioning system having conditioning means for producing conditioned air comprising:

a. each of said zones having temperature sense means for sensing the temperature and for detecting a need for conditioned air in the respective zone;

b. each of said zones having an associated damper means for regulating the amount of conditioned air flowing from said conditioning means into the respective zone;

each of said damper means operable to move between a closed position wherein conditioned air is prevented rom entering said respective zone and an open position wherein conditioned air is allowed to enter said respective zone;

c. a control unit for controlling the activation of said conditioning means and the production of conditioned air and for controlling the position of each of said damper means, said control unit being responsive to each of said temperature sense means so as to activate said conditioning means when a need for conditioned air is detected by either of the temperature sense means;

said control unit being connected to search of said temperature sense means, each of said damper means, and said conditioning means;

d. said control unit comprising select means for selecting the priority of one of said zones to form a selected zone, the other of said zones being an unselected zone, said selected zone maintaining its priority status over said unselected zone regardless of which zone needs conditioned air;

e. said control unit also comprises priority means for preempting the flow of conditioned air from said unselected zone and supplying the air flow to said selected zone whenever said selected zone needs air, said priority means providing said selected zone priority of conditioned air flow over said unselected zone when both zones need conditioned air by causing the damper means associated with said unselected zone to close thereby preventing air flow into said unselected zone while causing the damper means associated with said selected zone to open thereby allowing air flow into said selected zone;

f. said priority means providing conditioned air flow to said unselected zone whenever said unselected zone needs conditioned air and said selected zone does not need conditioned air by causing the damper means associated with said unselected zone to be in the open position and the damper means associated with said selected zone to be in the closed position.

11. The temperature control system of claim 10, wherein each of said damper means is biased in the open position and said control unit operates the damper means out of the open position to move to the closed position.

12. The temperature control system of claim 11 wherein:

a. said priority means comprises two switch means, each of said switch means being connected with a respective damper means and a power supply, said priority means being connected with each of said temperature sense means, said respective switch means being responsive to said respective temperature sense means, wherein when a respective switch means is closed the associated damper means is moved to the closed position;

b. said priority means controlling said respective switch means so that when the selected zone requires conditioned air the respective switch means connected with the damper means in the unselected zone is closed so as to move said damper means in the unselected zone to the closed position and the respective switch means connected with the damper means in the selected zone is opened so as to maintain the damper means in the selected zone in the open position;

c. said priority means controlling said respective switch means so that when the unselected zone require conditioned air and the selected zone does not require conditioned air the respective switch means connected with the damper means in the selected zone is closed so as to move said damper means in the selected zone to the closed position and said damper means in the unselected zone is left in the open position;

d. said priority means comprising a bypass switch means connected in parallel with said switch means connected with the unselected zone, said priority means controlling said bypass switch means so that when the selected zone and unselective zone require conditioned air at the same time, the bypass switch means is closed so as to move said damper means in the unselected zone to the closed position.

13. The temperature control system of claim 12 wherein said select means can be changed alternately between an on mode and an off mode, wherein when said select means is in its on mode priority of one zone is selected, when said select means is in its off mode all of said zones have equal priority of conditioned air flow.

14. The temperature control system of claim 10 wherein said select means can be changed alternately between an on mode and an off mode, wherein when said select means is in its on mode priority of one zone is selected, when said select means is in its off mode all of said zones have equal priority of conditioned air flow.

15. An electrical temperature control system for use with an air conditioning system servicing plural zones, said air conditioning system having conditioning means for producing conditioned air, comprising:

a. a control unit for controlling the activation of said conditioning means and the production of conditioned air, said control unit adapted to be connected with a temperature sense means in each zone and with a damper means in each zone and with said conditioning means, said temperature sense means for sensing the temperature and for detecting a need for conditioned air in the respective zone, said damper means for regulating he amount of conditioning air flowing into the respective zone, each of said damper means operable to move between open and closed positions, said control unit adapted to being responsive to each of said temperature sense means so as to activate said conditioning means when a need for conditioned air is detected by any of said temperature sense means;

b. said control unit comprises select means adapted for selecting the priority of one or more of said zones to form selected zones, the other of said zones being unselected zones, said select means adapted to maintain the priority status of said selected zones over said unselected zones regardless of which zones need conditioned air;

c. said control unit also comprises priority means adapted for preempting the flow of conditioned air from said unselected zones and supplying the air flow to said selected zones and supplying the air flow to said selected zones whenever said selected zones need air, said priority means adapted to provide said selected zones priority of conditioned air flow over said unselected other zones when both selected zones and unselected zones need conditioned air by causing the respective damper means associated with said unselected zones to be in the closed position thereby preventing air flow into said unselected zones while causing the respective damper means associated with said selected zones to be in the open position thereby allowing air flow into said selected zones;

d. said priority means adapted to provide conditioned air flow to said unselected zones whenever said unselected zones need conditioned air and said selected zones do not need conditioned air by causing the respective damper means associated with said unselected zones to be in the open position and the respective damper means associated with the selected zones to be in the closed position.