Abstract:
A method and system for easily relocating a thermostat for a heating and/or cooling system is used to enable a more suitable location for the efficient control of heating or cooling. The thermostat system utilizes a selectively placable transmitting thermostat that communicates with a receiver that is installed in place of the original, removed thermostat and connects by the existing original thermostat wiring to the HVAC units. In another aspect, multiple transmitting thermostats communicate with a single receiver which accepts thermostatic and other data. The receiver is configured to allow the user to select which one or more of the thermostats are made active. If multiple thermostats are activated, the user can select the priority assigned to each.

Description:
CROSS REFERENCE TO CO-PENDING APPLICATION 
       [0001]    This application claims the benefit of priority of provisional patent application Ser. No. 60/819,566 filed on Jul. 10, 2006, the entire contents of which are incorporated herein. 
     
     TECHNICAL FIELD 
       [0002]    The present disclosure generally relates to heating and cooling systems and, more specifically, to those that either provide better comfort by minimizing hot and cold spots in the controlled environment and/or conserve energy usage of the HVAC system. 
       BACKGROUND 
       [0003]    The design and construction of homes and other structures creates a condition whereby it is substantially difficult to provide even heating and cooling from room to room and, in some cases, within a particular room. Modern and legacy heating and cooling (HVAC) systems have never been designed to overcome the diversity of architectural design and the diversity of construction techniques both new and old. The resulting situation is one that leaves certain rooms either colder (cold spots) or warmer (hot spots) than what the home owners set at the thermostat. This is often times exacerbated by thermostats that are located in either a cold spot or a warm spot. This makes it problematic to achieve proper temperature control everywhere in the house or structure. 
         [0004]    The HVAC industry provides few solutions to this dilemma. One such solution is a flow booster that consists of a fan that is mounted in-line to a particular duct. This fan increases flow of the heated or cooled air to a particular room when the main system blower fan is operating. This is an inexpensive solution that can be installed in a “do-it-yourself” fashion; however, it often results in a particular room becoming over-cooled or over-heated as there is no thermostatic control of the booster fan. Another more costly solution is a multi-zone HVAC system. These systems usually consist of multiple furnaces and air conditioners. Typically, multiple units are installed as a result of heating and cooling capacity rather than to provide comfort or energy efficiency. Additionally, these HVAC systems and thermostatic control must be installed by a contractor and continue to provide potentially uneven heating and cooling control as each zone typically consists of multiple rooms. 
         [0005]    Therefore, there is an unaddressed need for a product that provides room-to-room temperature control which provides whole house temperature consistency at an affordable price. Additionally, there is an unaddressed need for such system to be easily installed in a do-it-yourself fashion and for there to be an option to relocate the home&#39;s thermostat to a more suitable location for consistent temperature control. 
     
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    The various features, advantages and other uses of the present heating and cooling control apparatus will become more apparent by referring to the following detailed description and drawings in which: 
           [0007]      FIG. 1  is a system diagram of a remote and relocated thermostat for a HVAC control system utilizing wireless communication means; 
           [0008]      FIG. 2  is a system diagram of a remote and relocated thermostat for a HVAC control system utilizing hard wired communication means; 
           [0009]      FIG. 3  is a system diagram of a remote and relocated thermostat based apparatus that utilizes two remote and relocated thermostats for a HVAC control system; one for a hot room and one for a cold room; 
           [0010]      FIG. 4  is a system diagram of an aspect of the apparatus that utilizes three or more relocated thermostats for a HVAC control system; 
           [0011]      FIG. 5  is a system logic diagram for a two room system in a heating mode; 
           [0012]      FIG. 6  is a system logic diagram for a two room system in a cooling mode; 
           [0013]      FIG. 7  is a system logic diagram for a three or more room system in a heating mode; 
           [0014]      FIG. 8  is a system logic diagram for a three or more room system in a cooling mode; 
           [0015]      FIG. 9  is a front view of a receiver for a two room system; and 
           [0016]      FIG. 10  is a front view of a receiver for a three or more room system. 
       
    
    
     DETAILED DESCRIPTION 
       [0017]    In addition to the drawings above, this description describes multiple aspects of a removed and relocated thermostat system as illustrated in the above referenced drawings. However, there is no intent to limit this disclosure to a single aspect onto the multiple aspects that are disclosed herein. On the contrary, the intent is to cover multiple alternatives, modifications, and equivalents included within the spirit and scope of this disclosure and as defined by the appended claims. 
         [0018]    This disclosure describes several means for relocating an otherwise fixed thermostat location for a heating, ventilating, and cooling system (HVAC system). The apparatus allows an individual to relocate the central thermostatic control of a heating or cooling system to a room or location different from that where it was originally located in the structure. In some cases, the current location of the thermostatic control system is not desirous due to it being in a hot or cold zone of the structure. In one aspect, the Move-a-Thermostat apparatus consists of a receiver that is mounted in the location of the current thermostat and connected to the control wire that leads to the heating and cooling devices. Additionally, there is a transmitting thermostat that includes the main temperature selection control. This apparatus interacts with the receiver by hardwire or wireless means. This apparatus is illustrated in  FIGS. 1 and 2 . 
         [0019]    In another aspect, the apparatus provides for two transmitting thermostats to be located one in a typically warm room and one in a typically cold room. Both thermostats transmit to the single receiver which is to be placed in the location of the original, removed and replaced thermostat. The receiver allows the user to select one thermostat (room) or the other or to select both. If the user selects both, he/she is able to provide priority to one or the other by means of a dial or switch. This may also be administered by a programmable receiver unit. This apparatus is illustrated in  FIGS. 3 ,  4 ,  5 , and  6 . 
         [0020]    In another aspect, the apparatus provides for three or more transmitting thermostats to be located in any or all of the rooms of the environment. All of the thermostats transmit to the single receiver which is to be placed in the location of the original, removed and replaced thermostat. The receiver allows the user to select one, any two, or all of the thermostats to be active. If the user selects more than one, he/she can assign priority to each thermostat by means of a dial or switch. An algorithm determines whether heating or cooling should be called for. This may also be administered by a programmable receiver unit. This apparatus is illustrated in  FIGS. 7 ,  8 ,  9 , and  10 . 
         [0021]    Throughout the following description the term “room” will be understood to have its conventional meaning as well as to encompass an area or zone covering one or more rooms whose temperature is being controlled. 
         [0022]      FIGS. 1 and 2  illustrate the basic system. In this system, the receiver  12  replaces the originally installed thermostat which is discarded and not employed in the system. A new remote thermostat  11  is then installed in a location that is desirous in terms of providing thermostatic data to achieve the user&#39;s objectives (energy efficiency, evenness of temperature throughout the dwelling, imperviousness to sunlight/open doors/etc.). The remote thermostat  11  transmits binary data (call for heating or not/call for cooling or not) to the receiver  12  by either wireless means  13  or by hardwired means  14 . The remote thermostat  11  may include a housing with a dial or digital display of a desired set temperature for the surrounding room, the existing temperature as sensed by a temperature sensor or thermocouple mounted in the thermostat housing, as well as a rotatable dial or input members, such as pushbuttons to allow the set temperature to be increased or decreased as desired by the user and/or to select heating, cooling, ventilation or off modes. The temperature sensor output can be used solely by the thermostat  11  in order to generate or cease the call for heating or cooling or the output may be transmitted by the thermostat  11  as part of the temperature related binary data signal. 
         [0023]    The thermostat  11  may actually embody an existing type of thermostat with appropriate dials, digital display and pushbuttons with the addition of a transmitter for wireless operation and a processor which is capable of providing digital binary data to the transmitter specifying the set temperature and the sensed or existing temperature so as to create a demand or trigger signal for heating or cooling for the room. The processor or control circuitry mounted within the thermostat housing may also provide a thermostat I.D. to prevent miscommunication with other wireless devices in the room or other thermostats, as described hereafter, which may transmit temperature-related data to the single receiver  12 . The processor or control circuitry is capable of arranging the temperature-related digital data in the proper order or packet format required for a particular wireless or hardwired communication protocol. 
         [0024]    The thermostat housing is capable of being mounted by various means, such as mechanical hangers or fasteners, double-backed tape, adhesive, etc., to a wall surface to enable the thermostat  11  to be located on any wall surface in a room and then moved to a different location if accurate temperature readings are not obtained. 
         [0025]    If the receiver  12  receives a signal from the remote thermostat  11  to call for heating/cooling, the receiver  12  or a signal generator in the receiver  16  generates the appropriate signal and transmits this signal to the furnace/air conditioner  16  through the original wires that the old, removed and replaced thermostat used. If the remote thermostat  11  communicates to the receiver  12  by wireless means  13 , there are many known to those skilled in the art and include, but are not limited to, Bluetooth technology, RF communication, and infrared transmission.  FIGS. 1 and 2  show that the remote thermostat  11  is powered by means of a battery power supply  15 . Those skilled in the art of thermostatic devices know that there are other powering means available such as hard wired systems, solar, and others. 
         [0026]      FIGS. 3 ,  4 ,  5 , and  6  describe a two thermostat system. Typically, the two thermostat system is configured such that one remote thermostat  21  is located in a typically warm room and another remote thermostat  22  is located in a typically cold room. It will be understood that the terms “warm room, “hot room,” and “cold room” are used as relative temperature indications as the terms “hot room” and “cold room” may be only a few degrees different in temperature. 
         [0027]    In terms of transmission of data, this system works in the same way that the single thermostat system does except that the transmitting thermostats  21 ,  22  transmit not only the binary data for need for heating/cooling but also: 1) the actual temperature of its environment (T), and 2) the set and desired temperature (S). The receiver  27  receives this data and applies a logic sequence and algorithm to determine whether heating or cooling should be called for. 
         [0028]      FIG. 6  shows the front panel of one design configuration of the receiver  27  for a two room system. This receiver  27  has buttons  30  and  31 . These buttons  30  and  31 , are for the user to make a selection. The user may select one or the other, or both of the remote thermostats  21  and  22 . If only the hot room is selected and the system is in heating mode,  FIG. 4 , steps  102  through  105 , depict the logic and operation of the system for the heating mode. When the receiver  27  receives signal  104  from the hot room remote thermostat  21 , the receiver  27  calls for heating by generating and sending a signal  105 . There is a similar sequence of operations if only the cold room button  31  is selected; these are described in  FIG. 4 , steps  106  through  109 .  FIG. 5  also similarly depicts these same logic steps if the system is set to cooling mode. Alternatively, the user may decide to select both the hot room button  30  and the cold room button  31 . In this scenario, the priority dial  32  becomes active. 
         [0029]    The priority dial  32  may be rotatable over a pre-set output range of values or magnitudes, such as 0.1 to 1.0 units over an approximate 300° range of rotation. Full left rotation of the priority dial  32  can cause the priority dial or associated circuitry, such as a potentiometer, to generate an appropriate signal equal to a low-priority i.e.; “0.1”, while a full rightward rotation of the priority dial  32  can generate a high-priority output i.e., “1.0”, for the selected hot room or cold room. 
         [0030]    For example, when both the hot room and cold room buttons  30  and  31  are selected, the priority dial  32  may be rotated to the full right-most position to indicate 100% priority for the hot room control with respect to the cold room control. Alternately, one of the rooms, such as the hot room, for example, may be selected by the setting of the priority dial  32  as a percentage of the full range of motion or output magnitude of the priority dial  32 , i.e., 75% with the related magnitude or value being (25%) provided as the priority of the cold room. For example, with the priority dial  32  set at 75% towards the hot room thermostat settings and output receive priority over the related cold room settings on a factor of 3:1. 
         [0031]    Further, separate priority dials  32  may be provided for each of the hot room and the cold room to provide individual priority settings between 0% and 100%. 
         [0032]    The priority dial  32  allows the user to determine which thermostat  21  or  22  takes precedence and by how much it does so. Also in this scenario, steps  110  and  111  of  FIG. 4  determine whether or not the receiver  27  calls for heating or, in steps  210  and  211  of  FIG. 5 , for cooling. Steps  110  and  210  employ an algorithm based on data inputs (T, S, binary trigger (Tr) from the thermostats  21 ,  22  and the position of the priority dial  32 ) to determine the action for heating or cooling. One version of this algorithm for heating mode  110  is as follows: 
         [0033]    T h =Hot Room Temperature 
         [0034]    T c =Cold Room Temperature 
         [0035]    S h =Hot Room Set Temperature 
         [0036]    S c =Cold Room Set Temperature 
         [0037]    TR h =Trigger Hot Room Thermostat (1=call for heat, 0=not calling for heat) 
         [0038]    TR c =Trigger Cold Room Thermostat (1=call for heat, 0=not calling for heat) 
         [0039]    PD=Setting on the priority dial (0.1-1.0, 0.1 for cold/1 for hot) 
         [0000]      Δ h   =S   h   −T   h    
         [0000]      Δ c   =S   c   −T   c    
         [0040]    IF (TR h =1 AND TR c =1) THEN Trigger for Heating, ELSE - - - 
         [0041]    IF (TR h =0 AND TR c =0) THEN No Trigger, ELSE - - - 
         [0042]    IF (Δ h ≧0 AND Δ h ≧PD*Δ c ) THEN, Trigger for Heating, ELSE - - - 
         [0043]    IF (Δ h &lt;0 AND |Δ h |≧Δ c /PD) THEN, Trigger for Heating, ELSE No Trigger. 
         [0044]    Similarly, one version of the algorithm for cooling mode  210  is as follows: 
         [0045]    IF (TR h =1 AND TR c =1) THEN Trigger for Cooling, ELSE - - - 
         [0046]    IF (TR h =0 AND TR c =0) THEN No Trigger, ELSE - - - 
         [0047]    IF (Δ h ≦0 AND Δ h ≦PD*Δ c ) THEN, Trigger for Cooling, ELSE - - - 
         [0048]    IF (Δ h &gt;0 AND Δ h ≧|Δ c |/PD) THEN, Trigger for Cooling, ELSE No Trigger 
         [0049]    Those skilled in the art of programming such devices understand that these algorithms and logic are just one version or example and describe a linear relationship between the position of the priority dial  32  and the outcome of the algorithm. Many other versions are possible including, but not limited to, non-linear relationships, such as logarithmic, exponential, quadratic and others. 
         [0050]      FIGS. 7 ,  8 ,  9 , and  10  depict a system with two or more or a plurality of thermostats  41 ,  42 , and  43 ; with a three-thermostat system being shown only for simplicity. In terms of the transmission of data, this system works in every way that the two thermostat system does. 
         [0051]      FIG. 10  shows the front panel of one example of a design configuration of the receiver  50  for a three room system. This receiver  50  has buttons  44 ,  45  and  46 . These buttons  44 ,  45  and  46 , are for the user to make a selection. The user may select any one, any combination of two, or all of the thermostats  44 ,  45 , and  46 . If only the one room with one thermostat  44 ,  45 , or  46  is selected and the system is in heating mode,  FIG. 8 , steps  302  through  305 , depict the logic and operation of the system for the heating mode. If the receiver  50  is receiving signal  304  from the active room remote thermostat  41  in room  44 , the receiver  50  calls for heating by generating and sending a signal  305 .  FIG. 9  also similarly depicts these same logic steps if the system is set to cooling mode. 
         [0052]    Alternatively, the user may decide to select two or more thermostats to be active. In this scenario, priority dials  47 ,  48 , or  49  become active. The priority dials  47 ,  48 ,  49  allow the user to determine which thermostat  41 ,  42 , or  43  takes precedence and by how much it does so. The priority dials  47 ,  48  and  49  operate in the same manner as the priority dial  32  in that each is rotatable over a maximum range of rotation, such as 300° and by itself or in combination with suitable circuitry, generates an output signal ranging between 0.1% for a full left rotation of any of the dials  47 ,  48 , and  49  up to 100% of maximum output value at a full right rotation position of any of the dials,  47 ,  48  and  49 , by example. 
         [0053]    In this manner, any one or any combination of two or all of the priority dials  47 ,  48 , and  49  may be made active when any one or combination of two or all three of the room buttons  44 ,  45 , and  46  are depressed. Any of the dials  47 ,  48 , and  49  can be set by the user at position corresponding to an output value between 0 and 100 to determine the priority of control provided by the associated thermostat. 
         [0054]    Also in this scenario, steps  306  and  307  of  FIG. 8  determine whether or not the receiver  50  calls for heating or for cooling by steps  406  and  407  of  FIG. 9 . Steps  306  and  406  employ an algorithm based on data inputs (T, S, binary trigger (Tr) from the thermostats  41 ,  42  and  43 , and the position of the priority dials  47 ,  48 , and  49 ) to determine the action for heating or cooling. One version of this algorithm for heating mode  306  is as follows: 
         [0055]    Definitions same as above 
         [0056]    PS=Priority Setting 
         [0057]    PD 1 =Priority Dial Setting Thermostat  1  (1-100) 
         [0058]    PD 2 −Priority Dial Setting Thermostat  2  (1-100) 
         [0059]    PD 3 =Priority Dial Setting Thermostat  3  (1-100) 
         [0000]    
       
      
       PD 
       1 
       =PD 
       1 
       +PD 
       2 
       +PD 
       3  
      
     
         [0000]        PS   1 =( PD   1   /PD   t )*100 (for purposes of simplifying the algorithm, this is assigned to the PS of the highest value) 
         [0000]        PS   2 =( PD   2   /PD   t )*100 (as above, this is assigned to the PS with the middle value) 
         [0000]        PS   3 =( PD   3   /PD   t )*100 (as above, this is assigned to the PS with the lowest value) 
         [0000]    
       
      
       F 
       1 
       =PS 
       2 
       /PS 
       1  
      
     
         [0000]    
       
      
       F 
       2 
       =PS 
       3 
       /PS 
       1  
      
     
         [0000]    
       
      
       F 
       2 
       =PS 
       3 
       /PS 
       2  
      
     
         [0060]    IF (TR 1 =1 AND TR 2 =1 AND TR 3 =1) THEN Trigger for Heating, ELSE - - - IF (TR 1 =0 AND TR 2 =0 AND TR 3 =0) THEN No Trigger, ELSE - - - 
         [0061]    IF (Δ 1 ≧0 AND Δ 2 ≧0 AND (Δ 1 ≧F 1 *Δ 2  OR Δ 1 ≧F 2 *Δ 3  OR Δ 2 ≧ 3 *Δ 3 ) THEN, Trigger for Heating, ELSE - - - 
         [0062]    IF (Δ 1 &lt;0 AND Δ 2 &lt;0 AND (|Δ 1 |≧Δ 2 /F 1  OR |Δ 1 |≧Δ 3 /F 2  OR |Δ 2 |≧Δ 3 /F 3 ) THEN, Trigger for Heating, ELSE No Trigger. 
         [0063]    Similarly one version of the algorithm for cooling mode  406 , is the following: 
         [0064]    IF (TR 1 =1 AND TR 2 =1 AND TR 3 =1) THEN Trigger for Cooling, ELSE - - - 
         [0065]    IF (TR 1 =0 AND TR 2 =0 AND TR 3 =0) THEN No Trigger, ELSE - - - 
         [0066]    IF (Δ 1 ≦0 AND Δ 2 ≦0 AND (Δ 1 =F 1 *Δ 2  OR Δ 1 ≦F 2 *Δ 3  OR Δ 2 ≦F 3 *Δ 3 ) THEN, Trigger for Cooling, ELSE - - - 
         [0067]    IF (Δ 1 &gt;0 AND Δ 2 &lt;0 AND (Δ 1 ≧|A 2 |/F 1  OR Δ 1 ≧|Δ 3 |/F 2  OR Δ 2 ≧Δ 3 /F 3 ) THEN, Trigger for Cooling, ELSE No Trigger. 
         [0068]    Those skilled in the art of programming such devices understand that these algorithms and logic are just one version or example and describe a linear relationship between the position of the priority dials  47 ,  48  and  49  and the outcome of the algorithm. Many other versions are possible including, but not limited to, non-linear relationships, such as logarithmic, exponential, quadratic and others.