CA1198795A - Amicro thermostatic process - Google Patents
Amicro thermostatic processInfo
- Publication number
- CA1198795A CA1198795A CA000442384A CA442384A CA1198795A CA 1198795 A CA1198795 A CA 1198795A CA 000442384 A CA000442384 A CA 000442384A CA 442384 A CA442384 A CA 442384A CA 1198795 A CA1198795 A CA 1198795A
- Authority
- CA
- Canada
- Prior art keywords
- mode
- heating
- cooling
- switch
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
The Amirco thermostatic process is a redesign of conventional or common electric wiring diagrams for any standard air conditioner unit as shown in our ?before modification? wiring diagram attached herein, to resemble the ?after modifications? wiring diagram also attached herein. The simple modifications of the electrical wiring as indicated by the ?before modification? and ?after modification? were developped in order to avoid both the evaporator And condensor motors in airconditioning units to continuously run during the thermostatic offcycles of both the heating and cooling modes. With these slight modifications in the electric wiring diagrams in any air conditioning unit, an inventive step has been made in that these slight modifications result in saving a tremendous amount of wasted energy and an increase in motor longevity as the motors are not continuously running, which at pre-sent with the standard, common or conventional type of electrical wiring diagrams seen in the ?before modifica-tion? diagram continuous running of both the evaporator and condensor motors occurs during the off cycle of both the heating and cooling modes when in fact they were not even needed.
The Amirco thermostatic process is a redesign of conventional or common electric wiring diagrams for any standard air conditioner unit as shown in our ?before modification? wiring diagram attached herein, to resemble the ?after modifications? wiring diagram also attached herein. The simple modifications of the electrical wiring as indicated by the ?before modification? and ?after modification? were developped in order to avoid both the evaporator And condensor motors in airconditioning units to continuously run during the thermostatic offcycles of both the heating and cooling modes. With these slight modifications in the electric wiring diagrams in any air conditioning unit, an inventive step has been made in that these slight modifications result in saving a tremendous amount of wasted energy and an increase in motor longevity as the motors are not continuously running, which at pre-sent with the standard, common or conventional type of electrical wiring diagrams seen in the ?before modifica-tion? diagram continuous running of both the evaporator and condensor motors occurs during the off cycle of both the heating and cooling modes when in fact they were not even needed.
Description
This invention relates to an automatic control for air conditioner window units used for both heating and cooling modes~
The present invention provides in an electric air conditioning system suitable for cooling or heating a room and comprising a unit having (a) a cooling component (b; a heating component (c) a mode selector switch and (d) a built-in control thermostat switch said cooling component comprising a compressor a condensor coil a motorized condenser fan an evaporation coil and a motorized evaporator fan said heating component comprising a heating element and said motorized evaporator fan referred to above the improvement wherein (i~ the mode selector switch has a cooling mode and a heating mode for changing the system, respectively, between a cooling func~ion and a heating function, the cooling mode of the mode selector switch, Eorming part of an electric circuit for energizing the cooling component, the heating mode of the selector switch, forming part of another electric circuit for energizing the heating component and (ii) the control thermostat switch has a cooling mode and a heating mode and can change between the cooling mode and the heating mode thereof when a predet~rm;n~ room temperature is reached, the cooling mode of the control thermostat switch forming part of the elec-tric circuit for energizing the cooling component, the heating mode of the control thermostat switch, forming part of the other electric circuit for energizing the heating component said cooling component being energized when said mode selector switch and said control thermostat switch are in their respective cooling modes, said heating component being energized when said mode selector switch and said control thermostat switch are in their respective heating modes, and when said mode selector switch is in the cooling mode, said control thermostat switch changes to the heating mode thereof to de-energize the cooling component when the predetermined room ~emperature is reached, and when said mode selector switch is in the heating mode, said control th~rmostat switch changes to the cooling mode thereof to de-energize the heating component when the predeterm;ned room temperature is reached.
In the drawings which illustrate the invention:
Figure 1 is a block diagram illustrating an embodiment of the inventionl Figure 2 is a specific wiring diagram before modification in accordance with the pxesent invention, and Figure 3 is a specific wiring diagram after modification in accordance with the present invention~
Figure 1 generally illustrates the electrical energizing circuits for the components of an air condi~
tioning system in accordance with the present invention.
The air conditioning system may be of the window type and can be used to cool or heat a room, the unit having a com-pressor, a condensor coil, a motorized condensor fan, an evaporator coil, a motorized evaporator fan and a heating element which axe ada~ted in a conventional manner to
The present invention provides in an electric air conditioning system suitable for cooling or heating a room and comprising a unit having (a) a cooling component (b; a heating component (c) a mode selector switch and (d) a built-in control thermostat switch said cooling component comprising a compressor a condensor coil a motorized condenser fan an evaporation coil and a motorized evaporator fan said heating component comprising a heating element and said motorized evaporator fan referred to above the improvement wherein (i~ the mode selector switch has a cooling mode and a heating mode for changing the system, respectively, between a cooling func~ion and a heating function, the cooling mode of the mode selector switch, Eorming part of an electric circuit for energizing the cooling component, the heating mode of the selector switch, forming part of another electric circuit for energizing the heating component and (ii) the control thermostat switch has a cooling mode and a heating mode and can change between the cooling mode and the heating mode thereof when a predet~rm;n~ room temperature is reached, the cooling mode of the control thermostat switch forming part of the elec-tric circuit for energizing the cooling component, the heating mode of the control thermostat switch, forming part of the other electric circuit for energizing the heating component said cooling component being energized when said mode selector switch and said control thermostat switch are in their respective cooling modes, said heating component being energized when said mode selector switch and said control thermostat switch are in their respective heating modes, and when said mode selector switch is in the cooling mode, said control thermostat switch changes to the heating mode thereof to de-energize the cooling component when the predetermined room ~emperature is reached, and when said mode selector switch is in the heating mode, said control th~rmostat switch changes to the cooling mode thereof to de-energize the heating component when the predeterm;ned room temperature is reached.
In the drawings which illustrate the invention:
Figure 1 is a block diagram illustrating an embodiment of the inventionl Figure 2 is a specific wiring diagram before modification in accordance with the pxesent invention, and Figure 3 is a specific wiring diagram after modification in accordance with the present invention~
Figure 1 generally illustrates the electrical energizing circuits for the components of an air condi~
tioning system in accordance with the present invention.
The air conditioning system may be of the window type and can be used to cool or heat a room, the unit having a com-pressor, a condensor coil, a motorized condensor fan, an evaporator coil, a motorized evaporator fan and a heating element which axe ada~ted in a conventional manner to
- 2 -`:~
provide cooling or heating as needed.
The system includes control means consisting of a mode selector switch and a built-in control thermostat switch. The cooling component and the heating component, as can be seen, share some common elements, namely the motorized evaporator fan, the mode selector switch and the built-in control thermostat switch.
The control thermostat switch can snap between a cooling mode and a heating mode in accordance with a pre-determined temperature. The cooling mode of the switchforms part of an electric circuit for energizing the cooling component whereas the heating mode forms part of another cir-cuit for energizing the heating component of the unit.
The mode selector switch likewise has a cooling mode and a heating mode, the cooling mode forming part of the electric circuit for energizing the cooling component and the heating mode forming part of the other electric cir-cuit for the heating component. In general, the mode selec~
tor switch can be any type of m~nual switch having first contact means dedicated to the cooling mode and a different second contact means dedicated to the heating mode; a con-tact means can comprise a group of contactors and attendant terminals. The switch is constructed so that when the first contact means is normally closed the second contact means is normally open and vice-versa. The electric circuit for the cooling component is made so that the compressor, the motor ized condenser fan and the motorized evaporator fan are each connected via the first contact means to at least one of the electric energizing lines devoted to the cooling component.
Similarly, the other electric circuit for the heating com-ponent is made so that the heating element and said motor-ized evaporator fan are each connected via the second con-tact means to at least one of the electric energizing lines devoted to the heating component. Accordingly, when the cooling function or the system is desired the mode selector 917~Si switch is manually disposed in the cooling mode so that the cooling component and,in particular, the motorized evaporator fan can be energized via the irst contact means dedicated to the cooling mode. Since the second contact means dedicated to the heating mode is in this case nox-mally open the heating component and in particular the evaporator fan cannot be energized thereby. The opposite state of affairs exists when the mode selector switch is manually disposed in the heating mode to obtain the heating function.
The motorized evaporator fan, which i5 common to the cooling component and the heating component, is energizable via the mode selectox switch in either of its modes whereas the other elements such as the compressor or heating element are not. The motorized evaporator fan cannot, however, be energized unless the control thermostat switch is in the same mode as the mode selector switch.
For example, referring back to figure l the mode selector switch can be of a kind wherein the electrical connector Ll' ~e.g. a wire) is connected to a terminal co~mon to both the cooling mode side and the heating mode side o~ the switch. The electrical connectors Ll~ and ~.
Ll~l on the other hand are connected to respective separate terminals in the cooling mode side and the heating mode side of the switch. The contact means for the switch are constructed such that when the first contact means is closed with respect to Ll' and Ll the second contact means is open with respect to Ll' and L1 and vice-versa. Thus, for example, when the mode selector switch is in the cooling mode the electrical connection between electrical connectors L1' and LlH is interrupted. In the context of the embodi-ment illustrated this means khat when the control thermosta-t switch is in its heating mode the evaporator fan cannot be energized until the selector switch is changed to its heat-ing mode. The electrical connectors Ll and Ll can also ~ 4 --, ., ,~ ~
7~i be interrupted by a respective cooling and heating mode side of the mode selector switch, e.g. when the mode selector switch is in the cooling mode LlH is interrupted by the heating mode side of the switch.
Thus the construction and wiring of the control thermostat switch and the mode selector switch is such that both must be in the same mode in order to energize the cool-ing or heating func-tion of the unit; please see Figure 3 with respect to details concerning the inter wiring of a suitable mode selector switch and a control thermostat switch. If the mode selector switch and the control thermo-stat switch are in different modes then all of the elements of the unit are de-energized including the motorized evapo-rator fan, which operates during the heating function or cooling function.
Turning now to a particular heat/cool unit, it is common in SLANT/FIN window units that both evaporator and condenser motors are running continuously even during the off cycle of the thermostat, causing fast deterioration of both these motors and the unnecessary consumption of energ~
during the off cycles. It has been found that these disad-vantages may be overcome by controlling the functionn-ng of these motors according to the order of the available built in dual thermostat which reflects the exact heating or cool-ing requirements. Although it is possible to insert a couple of switches or add an electronic device in order to achieve the requirements this increases the degree of complexity the control circuit as well as increasing manufacturing cost.
An intensive study of the functionning oE the available components in the unit showed that there were some extra terminals embedded in the selector switch of the unit when not in use, more specifically terminals no. 5, 6 and L2, in the before modification diagram (Figure 2~ an~ A~
B and C in the after modification diagram (Figure 3) respectively the purpose of these extra terminals was to 375~
operate a Eresh air motor as an optional item in standard equipment.
In accordance with the present invention those unused terminals of the selector switch can be used in such a fashion as to allow the evaporator motor to run in both the heating and cooling modes using terminal B when the heating mode is being used and terminal No. ~ when the cooling mode is being used. If the new and modi~ied electrical wiring diagram were to be used as in the ~<after modification diagram (Figure 3) herein attached, the following sequence of operations would occur:
SEQUENCE OF THE NEW MODIFIED OPERATION
A. SELECTOR LEVEL IN THE COOLING MODE
1~ An initial call for cooling would occur by pressing either the hi-cool or low-cool button on the selector switch.
2. The compressor, condensor and evaporator motor circuits are completed via the thermostat and function as follows~
I) The thermostat texminal No. 5 would connect with terminal No. 4 and then the compressor circuit is completed.
II) The thermostat terminal No. 4 is then connected with the terminal board which then completes the condensor motor circuit.
III) Since the terminal board is connected to terminal No. A on the selector switch and since terminals No. C and No. A are connected internally within the selector switch when cooling modes ha~e been selected, terminal No. C is thus completed and the evaporator circuit is also completed.
37~
provide cooling or heating as needed.
The system includes control means consisting of a mode selector switch and a built-in control thermostat switch. The cooling component and the heating component, as can be seen, share some common elements, namely the motorized evaporator fan, the mode selector switch and the built-in control thermostat switch.
The control thermostat switch can snap between a cooling mode and a heating mode in accordance with a pre-determined temperature. The cooling mode of the switchforms part of an electric circuit for energizing the cooling component whereas the heating mode forms part of another cir-cuit for energizing the heating component of the unit.
The mode selector switch likewise has a cooling mode and a heating mode, the cooling mode forming part of the electric circuit for energizing the cooling component and the heating mode forming part of the other electric cir-cuit for the heating component. In general, the mode selec~
tor switch can be any type of m~nual switch having first contact means dedicated to the cooling mode and a different second contact means dedicated to the heating mode; a con-tact means can comprise a group of contactors and attendant terminals. The switch is constructed so that when the first contact means is normally closed the second contact means is normally open and vice-versa. The electric circuit for the cooling component is made so that the compressor, the motor ized condenser fan and the motorized evaporator fan are each connected via the first contact means to at least one of the electric energizing lines devoted to the cooling component.
Similarly, the other electric circuit for the heating com-ponent is made so that the heating element and said motor-ized evaporator fan are each connected via the second con-tact means to at least one of the electric energizing lines devoted to the heating component. Accordingly, when the cooling function or the system is desired the mode selector 917~Si switch is manually disposed in the cooling mode so that the cooling component and,in particular, the motorized evaporator fan can be energized via the irst contact means dedicated to the cooling mode. Since the second contact means dedicated to the heating mode is in this case nox-mally open the heating component and in particular the evaporator fan cannot be energized thereby. The opposite state of affairs exists when the mode selector switch is manually disposed in the heating mode to obtain the heating function.
The motorized evaporator fan, which i5 common to the cooling component and the heating component, is energizable via the mode selectox switch in either of its modes whereas the other elements such as the compressor or heating element are not. The motorized evaporator fan cannot, however, be energized unless the control thermostat switch is in the same mode as the mode selector switch.
For example, referring back to figure l the mode selector switch can be of a kind wherein the electrical connector Ll' ~e.g. a wire) is connected to a terminal co~mon to both the cooling mode side and the heating mode side o~ the switch. The electrical connectors Ll~ and ~.
Ll~l on the other hand are connected to respective separate terminals in the cooling mode side and the heating mode side of the switch. The contact means for the switch are constructed such that when the first contact means is closed with respect to Ll' and Ll the second contact means is open with respect to Ll' and L1 and vice-versa. Thus, for example, when the mode selector switch is in the cooling mode the electrical connection between electrical connectors L1' and LlH is interrupted. In the context of the embodi-ment illustrated this means khat when the control thermosta-t switch is in its heating mode the evaporator fan cannot be energized until the selector switch is changed to its heat-ing mode. The electrical connectors Ll and Ll can also ~ 4 --, ., ,~ ~
7~i be interrupted by a respective cooling and heating mode side of the mode selector switch, e.g. when the mode selector switch is in the cooling mode LlH is interrupted by the heating mode side of the switch.
Thus the construction and wiring of the control thermostat switch and the mode selector switch is such that both must be in the same mode in order to energize the cool-ing or heating func-tion of the unit; please see Figure 3 with respect to details concerning the inter wiring of a suitable mode selector switch and a control thermostat switch. If the mode selector switch and the control thermo-stat switch are in different modes then all of the elements of the unit are de-energized including the motorized evapo-rator fan, which operates during the heating function or cooling function.
Turning now to a particular heat/cool unit, it is common in SLANT/FIN window units that both evaporator and condenser motors are running continuously even during the off cycle of the thermostat, causing fast deterioration of both these motors and the unnecessary consumption of energ~
during the off cycles. It has been found that these disad-vantages may be overcome by controlling the functionn-ng of these motors according to the order of the available built in dual thermostat which reflects the exact heating or cool-ing requirements. Although it is possible to insert a couple of switches or add an electronic device in order to achieve the requirements this increases the degree of complexity the control circuit as well as increasing manufacturing cost.
An intensive study of the functionning oE the available components in the unit showed that there were some extra terminals embedded in the selector switch of the unit when not in use, more specifically terminals no. 5, 6 and L2, in the before modification diagram (Figure 2~ an~ A~
B and C in the after modification diagram (Figure 3) respectively the purpose of these extra terminals was to 375~
operate a Eresh air motor as an optional item in standard equipment.
In accordance with the present invention those unused terminals of the selector switch can be used in such a fashion as to allow the evaporator motor to run in both the heating and cooling modes using terminal B when the heating mode is being used and terminal No. ~ when the cooling mode is being used. If the new and modi~ied electrical wiring diagram were to be used as in the ~<after modification diagram (Figure 3) herein attached, the following sequence of operations would occur:
SEQUENCE OF THE NEW MODIFIED OPERATION
A. SELECTOR LEVEL IN THE COOLING MODE
1~ An initial call for cooling would occur by pressing either the hi-cool or low-cool button on the selector switch.
2. The compressor, condensor and evaporator motor circuits are completed via the thermostat and function as follows~
I) The thermostat texminal No. 5 would connect with terminal No. 4 and then the compressor circuit is completed.
II) The thermostat terminal No. 4 is then connected with the terminal board which then completes the condensor motor circuit.
III) Since the terminal board is connected to terminal No. A on the selector switch and since terminals No. C and No. A are connected internally within the selector switch when cooling modes ha~e been selected, terminal No. C is thus completed and the evaporator circuit is also completed.
37~
3. When the thermostat is satisfied, terminal No. 5 disconnects with terminal No. 4 and jumps to terminal No. 6 on the thermostat thus disconnecting the com-pressor, condensor and evaporator motors. Although when this occurs Terminal B in the selector switch is energized by via terminal No. 6 in the thermostat, terminal No. C would not be enexgized because there is no internal connection between terminals B and C at the selector switch when the cooling mode is selected; i.e.
the evaporator motor is off.
B. SELECTOR LEVEL IN THE HEATING MODE
1. An initial call for heating would occur by pressing the heat button on the selector switch.
2. The first stage heater and evaporator motor circuits are completed and function as follows:
I3 The thermostat terminal No. 5 would connect with terminal No. 6 and then the first stage heater circuit is completed.
II~ Since terminal No. 6 in the thermostat is connected to terminal No. B on the selector switch and since the terminal ~o. C and No. B are con-nected internally within the selector switch, then when the heating modes have been selected terminal No. C is thus completed and the evapora-tor motor circuit is also completed.
III) The 2nd stage heater would cycle automatically only to satisfy the hi~load requirements.
IV) When the thermostat is satisfied, terminal Mo. 5 disconnects with terminal No. 6 and then jumps to terminal No~ 4 on the thermostat thus disconnect-ing the heater and the evaporator motors. ~owever r when this occuxs, terminal No. A in the selector B ~
switch is energized via terminal No. 4 in the thermostat and the terminal board, but terminal No. C would not be energi~ed because there is no internal connection between terminal No. A and No. C at the selector switch when the heating modes are selected.
Thus as indicated above the present invention can maXe use of a built-in--~ermostat and a selector switch having extra tPrmin~
found within,for the purposes of controlling the condensor and evaporator motor~ instead of solely using the thermo-stat for its main and/or standard purpose of controlling the compressor for the cooling system and the heater for the heating system in the seasonal air conditioning units that serves both heating and cooling modes.
The same modification can be made to the Ke~prite seasonal units by replacing the selector switch referred to as aRotary Type made by General Electric (model No. ASR 7179-316) instead of the other different types of selector rotary switches that used to be installed by the manufacturer in his different produced models.
~us it is quite clear that we can in fact modify any type of seasonal air conditioner using both the heating and cooling modes even if they are controlled by push button or rotary switches and the process is considered the most economical solution to save energy.
Thus in a~ ce with the present invention it is possible to use a type of switch having extra ~ermln~l~ that are able to function with both the heating and cooling modes for example the type of push botton switch found in the slant/fin circuit diagram or as mentioned before a model No. ASR 7179-316 switch made by General Electric which can be used when one is dealing with the Rotary Type~> switch.
In some cases it may be necessary to physically modify a known switch before it can be used in a system ?~
in accordance with the present invention; e.g. by modifying a contactor to be normally open when the switch is in the cooling mode and another contactor to be nor-mally open when the switch is in the heating mode.
the evaporator motor is off.
B. SELECTOR LEVEL IN THE HEATING MODE
1. An initial call for heating would occur by pressing the heat button on the selector switch.
2. The first stage heater and evaporator motor circuits are completed and function as follows:
I3 The thermostat terminal No. 5 would connect with terminal No. 6 and then the first stage heater circuit is completed.
II~ Since terminal No. 6 in the thermostat is connected to terminal No. B on the selector switch and since the terminal ~o. C and No. B are con-nected internally within the selector switch, then when the heating modes have been selected terminal No. C is thus completed and the evapora-tor motor circuit is also completed.
III) The 2nd stage heater would cycle automatically only to satisfy the hi~load requirements.
IV) When the thermostat is satisfied, terminal Mo. 5 disconnects with terminal No. 6 and then jumps to terminal No~ 4 on the thermostat thus disconnect-ing the heater and the evaporator motors. ~owever r when this occuxs, terminal No. A in the selector B ~
switch is energized via terminal No. 4 in the thermostat and the terminal board, but terminal No. C would not be energi~ed because there is no internal connection between terminal No. A and No. C at the selector switch when the heating modes are selected.
Thus as indicated above the present invention can maXe use of a built-in--~ermostat and a selector switch having extra tPrmin~
found within,for the purposes of controlling the condensor and evaporator motor~ instead of solely using the thermo-stat for its main and/or standard purpose of controlling the compressor for the cooling system and the heater for the heating system in the seasonal air conditioning units that serves both heating and cooling modes.
The same modification can be made to the Ke~prite seasonal units by replacing the selector switch referred to as aRotary Type made by General Electric (model No. ASR 7179-316) instead of the other different types of selector rotary switches that used to be installed by the manufacturer in his different produced models.
~us it is quite clear that we can in fact modify any type of seasonal air conditioner using both the heating and cooling modes even if they are controlled by push button or rotary switches and the process is considered the most economical solution to save energy.
Thus in a~ ce with the present invention it is possible to use a type of switch having extra ~ermln~l~ that are able to function with both the heating and cooling modes for example the type of push botton switch found in the slant/fin circuit diagram or as mentioned before a model No. ASR 7179-316 switch made by General Electric which can be used when one is dealing with the Rotary Type~> switch.
In some cases it may be necessary to physically modify a known switch before it can be used in a system ?~
in accordance with the present invention; e.g. by modifying a contactor to be normally open when the switch is in the cooling mode and another contactor to be nor-mally open when the switch is in the heating mode.
Claims
1. In an electric air conditioning system suitable for cooling or heating a room and comprising a unit having (a) a cooling component (b) a heating component (c) a mode selector switch and (d) a built-in control thermostat switch said cooling component comprising a compressor a condensor coil a motorized condenser fan an evaporator coil and a motorized evaporator fan said heating component comprising a heating element and said motorized evaporator fan referred to above the improvement wherein (i) the mode selector switch has a cooling mode and a heating mode for changing the system, respectively between a cooling function and a heating function, the cooling mode of the mode selector switch forming part of an electric circuit for energizing the cooling component, the heating mode of the selector switch, forming part of another electric circuit for energizing the heating component and (ii) the control thermostat switch has a cooling mode and a heating mode and can change between the cooling mode and the heating mode thereof when a predetermined room temperature is reached, the cooling mode of the control thermostat switch forming part of the elec-tric circuit for energizing the cooling component,the heating mode of the control thermostat switch forming part of the other electric circuit for energizing the heating component said cooling component being energized when said mode selector switch and said control thermostat switch are in their respective cooling modes, said heating component being energized when said mode selector switch and said control thermostat switch are in their respective heating modes, and when said mode selector switch is in the cooling mode, said control thermostat switch changes to the heating mode thereof to de-energize the cooling component when the predetermined room temperature is reached, and when said mode selector switch is in the heating mode, said control thermostat switch changes to the cooling mode thereof to de-energize the heating component when the predetermined room temperature is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000442384A CA1198795A (en) | 1983-12-01 | 1983-12-01 | Amicro thermostatic process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000442384A CA1198795A (en) | 1983-12-01 | 1983-12-01 | Amicro thermostatic process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1198795A true CA1198795A (en) | 1985-12-31 |
Family
ID=4126654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000442384A Expired CA1198795A (en) | 1983-12-01 | 1983-12-01 | Amicro thermostatic process |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1198795A (en) |
-
1983
- 1983-12-01 CA CA000442384A patent/CA1198795A/en not_active Expired
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |