CA2259796C - Personal environment system - Google Patents
Personal environment system Download PDFInfo
- Publication number
- CA2259796C CA2259796C CA002259796A CA2259796A CA2259796C CA 2259796 C CA2259796 C CA 2259796C CA 002259796 A CA002259796 A CA 002259796A CA 2259796 A CA2259796 A CA 2259796A CA 2259796 C CA2259796 C CA 2259796C
- Authority
- CA
- Canada
- Prior art keywords
- air
- personal environment
- environment system
- housing
- heat
- 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 - Fee Related
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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0042—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater characterised by the application of thermo-electric units or the Peltier effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
- F24F1/0323—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the mounting or arrangement of the heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
- F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/38—Personalised air distribution
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
- Air Conditioning Control Device (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
A personal environment unit comprises a housing having an air inlet and an air outlet, a diffuser in the air outlet for distributing air flowing therethrough, a heat exchanger for exchanging heat with air flowing between the air inlet and air outlet, a thermal fluid channel having a thermal fluid inlet port and a thermal fluid outlet port for connection to a thermal fluid reservoir, a heat pump located between said thermal fluid channel and said heat exchanger means, and a control unit for controlling the heat pump means to control the rate of supply of heat to, or withdrawal of heat from, the heat exchanger. The unit gives the individual complete control over his personal environment.
Description
CA 022~9796 1999-02-0~
This invention relates to environmental systems, and more particularly to an air distribution unit for use in such systems.
This application is a divisional application of Canadian patent application no. 2038563.
There is increasing concern over the comfort of personnel in the work environment, both in terms of air quality on the one hand and temperature and humidity levels on the other. With the trend toward open plan designs and sealed buildings, it becomes more difficult to ensure the comfort of individual workers. Most large buildings have centralized air conditioning units that control humidity and temperature levels and also filter out undesirable contaminants. Due to the volume of air to be processed, it takes a considerable time to condition the air in the entire building, and furthermore workers often have different individual comfort levels.
Smoking is often a problem. In many instances this is banned altogether due to its undesirable impact on non-smokers. However, such a ban can detrimentally effect the efficiency of habitual smokers.
An object of the invention is to alleviate the aforementioned disadvantages by allowing the individual to exercise some degree of control over his or her personal environment.
CA 022~9796 1999-02-0~
According to the present invention there is provided a personal environment unit comprising a housing having an air inlet and an air outlet, a diffuser means in said air outlet for distributing air flowing therethrough, a heat -exchanger for exchanging heat with air flowing between the air inlet and air outlet, a thermal fluid channel having a thermal fluid inlet port and a thermal fluid outlet port for connection to a thermal fluid reservoir, heat pump means located between said thermal fluid channel and said heat exchanger means, and a control unit for controlling said heat pump means to control the rate of supply of heat to, or withdrawal of heat from, said heat exchanger means.
The housing is preferably in the form of a desk mountable unit containing the heat exchanger. This arrangement gives the individual nearly complete control over the temperature of his local environment, which may be either warmer or colder than the ambient temperature in the room. This is particular useful for large open plan offices with many workers each having different needs.
The heat pump is preferably in the form of a thermoelectric device electrically controlled by the individual. The thermal reservoir can be in the form of a water tank located below the desk of the individual.
A filter can be mounted in the unit to filter the air passing through.
CA 022~9796 1999-02-0~
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:-Figure 1 is an overall perspective view of a desk-mountable personal environment system in accordance with the invention;
Figure 2 is a perspective view of the desk mountable unit;
Figure 3 is a cut away view of the core of a desk mountable unit in accordance with the invention;
Figures 4a and 4b are views of a second embodiment of a desk mountable unit with a lamp;
Figure 5 is a diagram of an alternative personal environment system in accordance with the invention;
Figure 6 shows a different form of grill plate for the desk mountable unit;
Figure 7 is a circuit diagram of the fan control circuit;
Figure 8a shows the variation in perceived colour as red and green LED's are selectively energized; and Figure 8b is a diagram of a circuit for energizing the LED's.
Referring now to Figure 1, a desk mountable unit 20 is connected by a flexible hose 21 to a fresh air supply 14.
The fresh air can be drawn from a plenum space below the floor communicating with a central air conditioning system, CA 022~9796 1999-02-0~
ductwork, or the ambient air in the room. The air is directed through the desk mountable unit 20 and out toward the individual through the angled, triangular grill 22, which serves as a diffuser. The desk mountable unit 20 contains a heat pump connected by hose lines 23 to a water reservoir 29 mounted beneath the desk.
The desk mountable unit 20 is shown in more detail in Figure 2. The unit comprises an upright triangular housing 25 mounted on a rectangular base 26 provided with control knobs 27. The upper part of the housing 25 is bevelled to provide the triangular, angled grill 22 through which air flows into the localized environment.
Within the housing 25 is located a heat pump-heat exchanger arrangement 28, described in more detail in Figure 3.
Referring now to Figure 3, the heat pump arrangement 28 comprises a central closed triangular core 29 with a fluid inlet and outlet 30, 31 at the bottom and top respectively. The inlet and outlet are connected by lines to water reservoir 24. A pump (not shown) is provided to circulate the water through the core 29, which is angularly offset relative to the housing 25 so that the apices of the core 29 are directed towards the midlines of the faces of the triangular housing 25.
A series of thermoelectric elements 32 are mounted on each of the faces of the core 29. The thermoelectric CA 022~9796 1999-02-0~
elements are commercially avallable semi-conductor Peltier effect devices, for example such as the Marlow Ml 1069 unit. The current through the elements 32 is adjusted by means of the controls 27 on the front of the unit.
Trapezoidal-shaped heat exchangers 33 of machined aluminum with vertical perpendicular fins are mounted on the outer faces of the thermoelectric elements 32 to provide, with core 29, the complete heat pump assembly 28.
A filter (not shown) is also mounted in the base of the housing.
In operation, the user controls the level and direction of current through the thermoelectric element 32, causing heat to be withdrawn from or returned to the liquid flowing through the core 29. As a result, the incoming air flowing up through the housing 25 between the fins of the heat exchangers 33 is heated or cooled as appropriate. The unit thus gives the individual personalized control of his local temperature, which can be either lower or higher than the ambient temperature in the room. This is particularly useful in large open-plan offices, where many work stations are located in one room. Since a heat pump is employed, any energy extracted from the air is stored in the water reservoir 24 for subsequent return to the air. As a result, the unit operates at high efficiency.
Figures 4a and 4b show a slightly modified version of the desk mountable unit. In this version, one half of the CA 022~9796 1999-02-0~
top of the unit 25 is bevelled to provide grill 22. A
triangular lamp 34 is mounted on an arm 35. The lamp 34 has a shape complementary to the remaining portion 35 of the top of the housing 25 such that in the closed position (Figure 8a) the lamp 34 may be tucked away to close the housing.
The base of the unit 28 is provided with different coloured LED's, for example, red, green and blue to indicate the status of the unit. Red would normally indicate the heating mode, blue the cooling mode, and amber the neutral is mode with heat neither being supplied to or withdrawn from the air stream. Alternatively, by placing red and green LED's side by side so that they form a common source of light, and energizing them selectively with the circuit shown in Figure 8b, a gradation of colours from green to red can be generated as shown in Figure 8a. In this arrangement, green represents maximum cooling, red maximum heating, and the various shades of amber in between correspond to the intermediate heating, cooling states, or neutral states of the unit.
The desk-mountable unit 25 permits the individual to exercise additional personal control by supplying air into the localized zone at a temperature which may be higher or lower than ambient temperature or the temperature of the air coming from the central air-conditioning system through the plenum space.
CA 022~9796 1999-02-0~
The desk-mountable unit 25 can direct the air flow toward the individual at a controllable rate of zero to 80 cfm according to personal preference. For this purpose a separate fan can be incorporated in the base of the unit or mounted externally.
The heat pump provides a coefficient of performance (COP) of 2.5 to 3.5 and provides up to 10~F cooling or 15~F
heating.
Figure 5 shows a an alternative arrangement, in which separate thermoelectric cell and fan unit 36 is mounted directly below the housing 25 under the desk.
The heat pump has been described so far with water as the heat transfer medium. In a preferred embodiment, to provide maximum efficiency, the heat transfer medium consists of a mixture of about 15~ by weight glycerine and water. The glycerine water mixture has a substantially higher heat capacity than water alone.
As shown in Figure 6, instead of having circular air outlets, the outlet grill 22 can be provided with machined channels 38. The channels can be machined at different angles to eject the air in different directions as shown by the arrows. This arrangement provides adequate comfort without directing the air toward the individual.
The efficiency of the heat pump depends on the temperature differential between that source and sink.
Since the personal environmental units are only required to CA 022~9796 1999-02-0~
operate over a relatively small range on the ambient air, the efficiency can be very high. For instance, if the ambient is at 21~C., it is unlikely that any particular individual will want to work in an environment different from the ambient by more than a few degrees.
The desk mountable units can be used to maximize comfort levels in an open-plan environment, such as may be found in a large building while at the same time maximizing efficiency. A common complaint of individuals is the stuffiness present in modern tightly sealed, energy efficient buildings. By providing a localized source of freshly filtered and conditioned air, the personal environment unit reduces this problem. Each individual has personal control over his or her immediate environment.
The described system is environmentally friendly since it does not employ CFC's and it operates independently of central air supply system at a power load of less than 170 watts.
If desired, the device can be controlled by an infra-red occupancy sensor designed to activate the desk-mountable unit according to preset conditions when an individual is present at the desk.
This invention relates to environmental systems, and more particularly to an air distribution unit for use in such systems.
This application is a divisional application of Canadian patent application no. 2038563.
There is increasing concern over the comfort of personnel in the work environment, both in terms of air quality on the one hand and temperature and humidity levels on the other. With the trend toward open plan designs and sealed buildings, it becomes more difficult to ensure the comfort of individual workers. Most large buildings have centralized air conditioning units that control humidity and temperature levels and also filter out undesirable contaminants. Due to the volume of air to be processed, it takes a considerable time to condition the air in the entire building, and furthermore workers often have different individual comfort levels.
Smoking is often a problem. In many instances this is banned altogether due to its undesirable impact on non-smokers. However, such a ban can detrimentally effect the efficiency of habitual smokers.
An object of the invention is to alleviate the aforementioned disadvantages by allowing the individual to exercise some degree of control over his or her personal environment.
CA 022~9796 1999-02-0~
According to the present invention there is provided a personal environment unit comprising a housing having an air inlet and an air outlet, a diffuser means in said air outlet for distributing air flowing therethrough, a heat -exchanger for exchanging heat with air flowing between the air inlet and air outlet, a thermal fluid channel having a thermal fluid inlet port and a thermal fluid outlet port for connection to a thermal fluid reservoir, heat pump means located between said thermal fluid channel and said heat exchanger means, and a control unit for controlling said heat pump means to control the rate of supply of heat to, or withdrawal of heat from, said heat exchanger means.
The housing is preferably in the form of a desk mountable unit containing the heat exchanger. This arrangement gives the individual nearly complete control over the temperature of his local environment, which may be either warmer or colder than the ambient temperature in the room. This is particular useful for large open plan offices with many workers each having different needs.
The heat pump is preferably in the form of a thermoelectric device electrically controlled by the individual. The thermal reservoir can be in the form of a water tank located below the desk of the individual.
A filter can be mounted in the unit to filter the air passing through.
CA 022~9796 1999-02-0~
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:-Figure 1 is an overall perspective view of a desk-mountable personal environment system in accordance with the invention;
Figure 2 is a perspective view of the desk mountable unit;
Figure 3 is a cut away view of the core of a desk mountable unit in accordance with the invention;
Figures 4a and 4b are views of a second embodiment of a desk mountable unit with a lamp;
Figure 5 is a diagram of an alternative personal environment system in accordance with the invention;
Figure 6 shows a different form of grill plate for the desk mountable unit;
Figure 7 is a circuit diagram of the fan control circuit;
Figure 8a shows the variation in perceived colour as red and green LED's are selectively energized; and Figure 8b is a diagram of a circuit for energizing the LED's.
Referring now to Figure 1, a desk mountable unit 20 is connected by a flexible hose 21 to a fresh air supply 14.
The fresh air can be drawn from a plenum space below the floor communicating with a central air conditioning system, CA 022~9796 1999-02-0~
ductwork, or the ambient air in the room. The air is directed through the desk mountable unit 20 and out toward the individual through the angled, triangular grill 22, which serves as a diffuser. The desk mountable unit 20 contains a heat pump connected by hose lines 23 to a water reservoir 29 mounted beneath the desk.
The desk mountable unit 20 is shown in more detail in Figure 2. The unit comprises an upright triangular housing 25 mounted on a rectangular base 26 provided with control knobs 27. The upper part of the housing 25 is bevelled to provide the triangular, angled grill 22 through which air flows into the localized environment.
Within the housing 25 is located a heat pump-heat exchanger arrangement 28, described in more detail in Figure 3.
Referring now to Figure 3, the heat pump arrangement 28 comprises a central closed triangular core 29 with a fluid inlet and outlet 30, 31 at the bottom and top respectively. The inlet and outlet are connected by lines to water reservoir 24. A pump (not shown) is provided to circulate the water through the core 29, which is angularly offset relative to the housing 25 so that the apices of the core 29 are directed towards the midlines of the faces of the triangular housing 25.
A series of thermoelectric elements 32 are mounted on each of the faces of the core 29. The thermoelectric CA 022~9796 1999-02-0~
elements are commercially avallable semi-conductor Peltier effect devices, for example such as the Marlow Ml 1069 unit. The current through the elements 32 is adjusted by means of the controls 27 on the front of the unit.
Trapezoidal-shaped heat exchangers 33 of machined aluminum with vertical perpendicular fins are mounted on the outer faces of the thermoelectric elements 32 to provide, with core 29, the complete heat pump assembly 28.
A filter (not shown) is also mounted in the base of the housing.
In operation, the user controls the level and direction of current through the thermoelectric element 32, causing heat to be withdrawn from or returned to the liquid flowing through the core 29. As a result, the incoming air flowing up through the housing 25 between the fins of the heat exchangers 33 is heated or cooled as appropriate. The unit thus gives the individual personalized control of his local temperature, which can be either lower or higher than the ambient temperature in the room. This is particularly useful in large open-plan offices, where many work stations are located in one room. Since a heat pump is employed, any energy extracted from the air is stored in the water reservoir 24 for subsequent return to the air. As a result, the unit operates at high efficiency.
Figures 4a and 4b show a slightly modified version of the desk mountable unit. In this version, one half of the CA 022~9796 1999-02-0~
top of the unit 25 is bevelled to provide grill 22. A
triangular lamp 34 is mounted on an arm 35. The lamp 34 has a shape complementary to the remaining portion 35 of the top of the housing 25 such that in the closed position (Figure 8a) the lamp 34 may be tucked away to close the housing.
The base of the unit 28 is provided with different coloured LED's, for example, red, green and blue to indicate the status of the unit. Red would normally indicate the heating mode, blue the cooling mode, and amber the neutral is mode with heat neither being supplied to or withdrawn from the air stream. Alternatively, by placing red and green LED's side by side so that they form a common source of light, and energizing them selectively with the circuit shown in Figure 8b, a gradation of colours from green to red can be generated as shown in Figure 8a. In this arrangement, green represents maximum cooling, red maximum heating, and the various shades of amber in between correspond to the intermediate heating, cooling states, or neutral states of the unit.
The desk-mountable unit 25 permits the individual to exercise additional personal control by supplying air into the localized zone at a temperature which may be higher or lower than ambient temperature or the temperature of the air coming from the central air-conditioning system through the plenum space.
CA 022~9796 1999-02-0~
The desk-mountable unit 25 can direct the air flow toward the individual at a controllable rate of zero to 80 cfm according to personal preference. For this purpose a separate fan can be incorporated in the base of the unit or mounted externally.
The heat pump provides a coefficient of performance (COP) of 2.5 to 3.5 and provides up to 10~F cooling or 15~F
heating.
Figure 5 shows a an alternative arrangement, in which separate thermoelectric cell and fan unit 36 is mounted directly below the housing 25 under the desk.
The heat pump has been described so far with water as the heat transfer medium. In a preferred embodiment, to provide maximum efficiency, the heat transfer medium consists of a mixture of about 15~ by weight glycerine and water. The glycerine water mixture has a substantially higher heat capacity than water alone.
As shown in Figure 6, instead of having circular air outlets, the outlet grill 22 can be provided with machined channels 38. The channels can be machined at different angles to eject the air in different directions as shown by the arrows. This arrangement provides adequate comfort without directing the air toward the individual.
The efficiency of the heat pump depends on the temperature differential between that source and sink.
Since the personal environmental units are only required to CA 022~9796 1999-02-0~
operate over a relatively small range on the ambient air, the efficiency can be very high. For instance, if the ambient is at 21~C., it is unlikely that any particular individual will want to work in an environment different from the ambient by more than a few degrees.
The desk mountable units can be used to maximize comfort levels in an open-plan environment, such as may be found in a large building while at the same time maximizing efficiency. A common complaint of individuals is the stuffiness present in modern tightly sealed, energy efficient buildings. By providing a localized source of freshly filtered and conditioned air, the personal environment unit reduces this problem. Each individual has personal control over his or her immediate environment.
The described system is environmentally friendly since it does not employ CFC's and it operates independently of central air supply system at a power load of less than 170 watts.
If desired, the device can be controlled by an infra-red occupancy sensor designed to activate the desk-mountable unit according to preset conditions when an individual is present at the desk.
Claims (11)
1. A personal environment system for creating a user-definable local environment within a localized zone in an ambient space, comprising:
a modular housing comprising an upright desk mountable, triangular prismatic body with an inclined truncated top, said housing being mountable in said localized zone and having an air inlet, an air outlet incorporating a diffuser for distributing conditioned air into said localized zone, said air outlet being defined by said truncated top, an air flow channel between said air inlet and said air outlet, and a channel for a thermal fluid for supplying heat from or carrying away heat to a common space outside said localized zone;
blower means for causing air to flow through said air channel;
a heat exchanger between said air flow channel and said thermal fluid channel and including a thermoelectric heat pump to effect transfer of heat between air flowing through said air flow channel and said thermal fluid channel;
and user-controlled means for setting the amount of heating or cooling applied by said heat pump to air flowing through said air channel to permit the user to control the air temperature within the localized zone according to personal comfort requirements independently of the general air temp mature of the ambient space.
a modular housing comprising an upright desk mountable, triangular prismatic body with an inclined truncated top, said housing being mountable in said localized zone and having an air inlet, an air outlet incorporating a diffuser for distributing conditioned air into said localized zone, said air outlet being defined by said truncated top, an air flow channel between said air inlet and said air outlet, and a channel for a thermal fluid for supplying heat from or carrying away heat to a common space outside said localized zone;
blower means for causing air to flow through said air channel;
a heat exchanger between said air flow channel and said thermal fluid channel and including a thermoelectric heat pump to effect transfer of heat between air flowing through said air flow channel and said thermal fluid channel;
and user-controlled means for setting the amount of heating or cooling applied by said heat pump to air flowing through said air channel to permit the user to control the air temperature within the localized zone according to personal comfort requirements independently of the general air temp mature of the ambient space.
2. A personal environment system as claimed in claim 1, wherein said heat exchanger comprises an elongate hollow block of polygonal cross section fitted within the housing and having a set of outwardly protruding, longitudinal parallel fins on lateral faces thereof, adjacent pairs of said fins defining between them portions of said air flow channel, and said thermoelectric heat pump comprising flat thermoelectric cells mounted on said lateral face between said face and said fins, and said thermal fluid channel extends within said block.
3. A personal environment system as claimed in claim 2, wherein said housing and said block are in the form of triangular prisms, with said block fitted inside said housing and rotationally offset such that the flat walls of the block face the apices of the housing.
4. A personal environment system as claimed in claim 1, comprising means for sensing the presence of an occupant in said localized zone, and means for activating said blower means in response to a signal from said sensing means indicative of the presence of an occupant in said localized zone and deactivating said blower means in the absence of a said signal.
5. A personal environment system as claimed in claim 4, wherein said sensing means comprises an infrared sensor.
6. A personal environment system as claimed in claim 4, further comprising memory means for storing an occupant's preferred control setting, whereby on the return of an occupant to the localized zone the system is automatically activated at the occupant's preferred setting.
7. A personal environment system as claimed in claim 1, further comprising a light source of changeable colour and means for changing the colour of said light source in accordance with the state of the thermoelectric heat pump.
8. A personal environment system as claimed in claim 7, wherein the colour of said light source gradually changes from blue when said heat pump is in a cooling state to red when said heat pump is in a heating state.
9. A personal environment system as claimed in claim 1, wherein said truncated top comprises an inclined triangular plate for egress of air therefrom with a plurality holes formed therein.
10. A personal environment system as claimed in claim 1, incorporating a filter in the air flow path to remove particulate and other contaminants therefrom.
11. A personal environment system as claimed in claim 1, further comprising filter means in said housing for removing particulate and other contaminants from air flowing through said air channel.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002259796A CA2259796C (en) | 1991-03-19 | 1991-03-19 | Personal environment system |
| CA2038563A CA2038563A1 (en) | 1991-03-19 | 1991-03-19 | Personal environment system |
| US08/119,123 US5499504A (en) | 1991-03-19 | 1992-03-19 | Desk mounted personal environment system |
| AU15495/92A AU1549592A (en) | 1991-03-19 | 1992-03-19 | Personal environment system |
| EP92906679A EP0575433A1 (en) | 1991-03-19 | 1992-03-19 | Personal environment system |
| JP50632292A JP3188700B2 (en) | 1991-03-19 | 1992-03-19 | Personal environment system |
| PCT/CA1992/000121 WO1992016799A1 (en) | 1991-03-19 | 1992-03-19 | Personal environment system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002259796A CA2259796C (en) | 1991-03-19 | 1991-03-19 | Personal environment system |
| CA2038563A CA2038563A1 (en) | 1991-03-19 | 1991-03-19 | Personal environment system |
| CA002252987A CA2252987C (en) | 1991-11-08 | 1991-11-08 | Air distribution system |
| CA2055162A CA2055162A1 (en) | 1991-11-08 | 1991-11-08 | Air distribution system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2038563A Division CA2038563A1 (en) | 1991-03-19 | 1991-03-19 | Personal environment system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2259796A1 CA2259796A1 (en) | 1992-09-20 |
| CA2259796C true CA2259796C (en) | 2001-06-12 |
Family
ID=27168881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002259796A Expired - Fee Related CA2259796C (en) | 1991-03-19 | 1991-03-19 | Personal environment system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2259796C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH715487B1 (en) * | 2018-10-18 | 2022-02-28 | Beat Kegel | Recirculating air conditioner for air conditioning a room in a building. |
-
1991
- 1991-03-19 CA CA002259796A patent/CA2259796C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2259796A1 (en) | 1992-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |