CA1202956A - Air to air heat exchanger - Google Patents
Air to air heat exchangerInfo
- Publication number
- CA1202956A CA1202956A CA000446873A CA446873A CA1202956A CA 1202956 A CA1202956 A CA 1202956A CA 000446873 A CA000446873 A CA 000446873A CA 446873 A CA446873 A CA 446873A CA 1202956 A CA1202956 A CA 1202956A
- Authority
- CA
- Canada
- Prior art keywords
- air
- tubes
- baffle means
- enclosure
- heat exchanger
- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
- F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
AIR TO AIR HEAT EXCHANGER
ABSTRACT OF THE DISCLOSURE
This is an air to air heat exchanger. A unit uti-lizing tubes inside a boxed area for the purpose of trans-ferring heat. Special positioning of these tubes allows efficient heat transfer and non-clogging of unit. Cold air travels inside of tubes and hot air around the exte-rior of them. Cold air chambers are insulated, eliminating external condensation. Interior condensation is drained by use of a slanted floor under the heat transfer tubes.
Multiple air flow chambers in both cold and hot air passa-ges increase heat transfer and retard unit freeze up. Built in washing apparatus may be provided to facilitate unit maintenance. Construction materials may consist of acry-lics, plastic piping and metals having special coatings.
Variable speed fans thermostatically controlled allow for variance in environmental temperatures. To conclude, the unit utilizes hot exhaust air to preheat incoming cold air.
ABSTRACT OF THE DISCLOSURE
This is an air to air heat exchanger. A unit uti-lizing tubes inside a boxed area for the purpose of trans-ferring heat. Special positioning of these tubes allows efficient heat transfer and non-clogging of unit. Cold air travels inside of tubes and hot air around the exte-rior of them. Cold air chambers are insulated, eliminating external condensation. Interior condensation is drained by use of a slanted floor under the heat transfer tubes.
Multiple air flow chambers in both cold and hot air passa-ges increase heat transfer and retard unit freeze up. Built in washing apparatus may be provided to facilitate unit maintenance. Construction materials may consist of acry-lics, plastic piping and metals having special coatings.
Variable speed fans thermostatically controlled allow for variance in environmental temperatures. To conclude, the unit utilizes hot exhaust air to preheat incoming cold air.
Description
~2~)Z956 AIR TO AIR HEAT EXCHANGER
BACKGROUND OF THE INVENTION
This invention relates to new and useful improve-ments in air to air heat exchangers for the transferance of heat from the exhaust air to the incoming air.
It is well known to use multiple metal plates or plastic sheeting having Eractional separation, as heat ex-changers with the incoming air being preheated by the ex-haust air. However, several difficulties arise from this construction such as the fractional separation among the plates increases the entrapment of dirt, dust and the like.
Furthermore, the non-drainage of internal condensation of-ten causes the unit to freeze up and hence leads to loss of heat transfer and corrosion in many instances.
The non-insulating of the cold air chambers parti-culary, may cause exterior condensation.
This particular form of construction makes the duct-ing of air flows impractical and unit deficiency and adap-tability are limited due to having a constant cubic feet per minute air flow.
SUMMARY OF THE INVENTION
We have found that these disadvantages may be over-come by the following changes:
., g56
BACKGROUND OF THE INVENTION
This invention relates to new and useful improve-ments in air to air heat exchangers for the transferance of heat from the exhaust air to the incoming air.
It is well known to use multiple metal plates or plastic sheeting having Eractional separation, as heat ex-changers with the incoming air being preheated by the ex-haust air. However, several difficulties arise from this construction such as the fractional separation among the plates increases the entrapment of dirt, dust and the like.
Furthermore, the non-drainage of internal condensation of-ten causes the unit to freeze up and hence leads to loss of heat transfer and corrosion in many instances.
The non-insulating of the cold air chambers parti-culary, may cause exterior condensation.
This particular form of construction makes the duct-ing of air flows impractical and unit deficiency and adap-tability are limited due to having a constant cubic feet per minute air flow.
SUMMARY OF THE INVENTION
We have found that these disadvantages may be over-come by the following changes:
., g56
- 2 Firstly, by using tubes rather than fractional se paration plates, a greater distance between the tubes may be obtained without losing any heat transEer area. This effectively decreases dirt entrapment.
Furthermore, the use of a slanted floor allows in-ternal condensation drainage and therefore retards unit freeze-up and hence the loss of heat transfer efficiency.
The use of a multiple chamber type of construction due to baffles, of both the intake and exhaust air, maxi-mizes unit deficiency and the incorporation of plasticpiping or the like eliminates corrosion. Alternatively, special coated metals or stainless steel will also retard corrosion problems.
It is desirable that the cold air ducts be insula-ted thereby lowering the chance of external condensation, retaining unit efficiency and allowing for environmental temperature changes.
Variable speed fans in conjunction with thermostats or other conventional control means may be used and the intake and exhaust ports are designed to accept air flow ducting, once again thus increasing unit adaptability.
In accordance with the invention there is provided an air to air heat exchanger comprising in combination an outer enclosure, a plurality of spaced apart tubes therein '~", `
~2~Z956 forming a plurality of conduits for an incoming air flow, a plurality of exhaust air flow passes around said tubes, first baffle means between the tubes defining the exhaust air flow passes, an intake fan assembly for the incoming air operatively connected to said tubes and an incoming air outlet in said enclosure, an exhaust fan assembly for the exhaust air operatively connected to the exhaust air passes and an exhaust air outlet in said enclosure, and a sloping floor in said enclosure to drain condensate from said exchanger, said enclosure being insulated to inhibit condensation therein and to improve the heat transfer cha-racteristics of said heat exchanger.
Another advantage of the invention is to provide a device of the character herewithin described wnich is sim-ple in construction, economical in manufacture and other-wise well suited to the purpose for which it is designed.
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specifiction proceeds, the invention is herein described by reference to the accom-panying drawings forming a part hereof, which includes a description of the preferred typical embodiment of the principles of the present invention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevation of our device.
Figure 2 is a top plan view thereof.
Figure 3 is a left hand elevational view.
Figure 4 is a right hand elevational view.
Figure 5 is a vertical cross section.
Figure 6 is a horizontal cross section.
In the drawings like characters of reference indi-cate corresponding parts in the different figures.
DETAILED DESCRIPTION
Proceeding therefore to describe the invention in detail, an enclosure is provided which includes an upper panel or wall 15, a lower panel or wall 16, a pair of side panels 9 and lOand a pair of end panels 17 and 18.
First baffle means are provided indicated by refer-ence characters 1 and 2, although more baffles can be uti-lized, if necessary.
Baffle 1 extends downwardly from the upper panel or wall 15 and terminates spaced from the floor 7 and baffle 2 extends upwardly from the floor 7 and terminates spaced 29 from the upper wall 15.
A plurality of tubes 19 are situated in the block within the casing, said tubes being open ended and in spa-ced apart relationship. These terminate spaced from the side walls 9 and 10 as clearly shown in Figure 6.
~B~
The baffles 1 and 2 divide these tubes into three blocks or chambers A, B and C.
An intake fan assembly H is situated in one side wall 10 adjacent one end lOA thereof and may be thermo-statically or otherwise controlled as desired~ This fan also may be of a variable speed type.
It communicates with the interior of the casing as will hereinafter be described.
An intake air or hot air port 6 is situated in the opposite side wall 9 adjacent the opposite end 9A to the end lOA of the side wall 10. This again communicates with the interior of the casing or enclosure as will hereinafter be described.
An exhaust air fan assembly I is provided in one end wall 18 adjacent the upper side thereof and is also thermostatically or otherwise controlled and may be of a variable speed type which picks up exhaust air through the exhaust air intake port 5.
Within the opposite end wall 17 and adjacent the lower side thereof, there is an exhaust air exit port D.
Both the intake assembly H and the exhaust port D may be extended externally of the building (not illustrated) so that fresh air is drawn into the casing by the fan assem-bly H and stale or exhaust air is exhausted externally of ~L2~)Z9S~
the building through the exhaust outlet port D.
Second baffle means 3 and 4 are provided extending from baffles 2 and 1 respectively with the baffle 3 ex-tending from one side of the baffle 2, to the side wall 10 and baffle 4 extending on the opposite side from baffle 1, to the side wall 9.
These define a primary chamber 11 just inboard oE
the intake fan assembly H whereupon air from the intake may pass through the tubes 19 in block C to chamber 12, and thènce through the tubes 19 in block B to the chamber 13 and then again through the tubes lg in block C to chamber 14 which communicates with the hot air outlet port 6 as clearly shown in Figure 6.
This means that the air passing through the tubes 19 move simultaneously from one side towards one side wall and then the other giving the maximum travel of the air through the tubes.
Preheating is by the exhaust air entering the ex-haust fan assembly I through intake port 5 and then pass-ing over the outsides of the tubes, once again passing down-wardly through the tubes in block A and under the parti-tion or baEfle 1 and then upwardly around the tubes 19 in block B and over the baffle 2 and then downwardly arolmd the tubes 19 in block C and finally exiting through the ~,.
Z~;i6 exhaust exit port D, once again travelling simultaneously upwardly and downwardly around baffles 1 and 2.
Thus, the heat chamber A is the primary exhaust cool down, chamber B is the secondary cool down chamber and chamber B is the final cool down chamber.
- Intake air receives its primary warm up in chamber C, secondary warm up in chamber B and final heat transfer in chamber A.
It should be noted that the fresh air exhaust port 6 and exhaust intake port 5 are easily changed to adapt to different types of ducting.
The unit can be built for left or right use by in-terchanging the side panels 9 and 10 together with the baf-fles 3 and 4 and the inlet air port 6 and outlet exhaust port 5 are preferably cylindrical in order to adapt to plastic pipe ducts which arè non-corrosive.
Finally, mention should be made of the sloping floor 7 which collects any condensation which might occur and which can be ducted externally, if desired (not illustra-ted).
The air to air heat exchanger may be made with morechambers such as A, B and C, if desired, as long as the air flow goes through the tubes and through the chambers simultaneously to allow maximum heat transfer.
i~,~
~029~6 The device may be used in livestock buildings or commercial buildings where acids or toxic chemicals are present and o~ co~rse the size can vary to accommodate di-ferent situations or needs.
Since various modifications can be made in our in-vention as hereinabove described, and many apparently wide-ly different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illus-trative only and not in a limiting sense.
``B~
Furthermore, the use of a slanted floor allows in-ternal condensation drainage and therefore retards unit freeze-up and hence the loss of heat transfer efficiency.
The use of a multiple chamber type of construction due to baffles, of both the intake and exhaust air, maxi-mizes unit deficiency and the incorporation of plasticpiping or the like eliminates corrosion. Alternatively, special coated metals or stainless steel will also retard corrosion problems.
It is desirable that the cold air ducts be insula-ted thereby lowering the chance of external condensation, retaining unit efficiency and allowing for environmental temperature changes.
Variable speed fans in conjunction with thermostats or other conventional control means may be used and the intake and exhaust ports are designed to accept air flow ducting, once again thus increasing unit adaptability.
In accordance with the invention there is provided an air to air heat exchanger comprising in combination an outer enclosure, a plurality of spaced apart tubes therein '~", `
~2~Z956 forming a plurality of conduits for an incoming air flow, a plurality of exhaust air flow passes around said tubes, first baffle means between the tubes defining the exhaust air flow passes, an intake fan assembly for the incoming air operatively connected to said tubes and an incoming air outlet in said enclosure, an exhaust fan assembly for the exhaust air operatively connected to the exhaust air passes and an exhaust air outlet in said enclosure, and a sloping floor in said enclosure to drain condensate from said exchanger, said enclosure being insulated to inhibit condensation therein and to improve the heat transfer cha-racteristics of said heat exchanger.
Another advantage of the invention is to provide a device of the character herewithin described wnich is sim-ple in construction, economical in manufacture and other-wise well suited to the purpose for which it is designed.
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specifiction proceeds, the invention is herein described by reference to the accom-panying drawings forming a part hereof, which includes a description of the preferred typical embodiment of the principles of the present invention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevation of our device.
Figure 2 is a top plan view thereof.
Figure 3 is a left hand elevational view.
Figure 4 is a right hand elevational view.
Figure 5 is a vertical cross section.
Figure 6 is a horizontal cross section.
In the drawings like characters of reference indi-cate corresponding parts in the different figures.
DETAILED DESCRIPTION
Proceeding therefore to describe the invention in detail, an enclosure is provided which includes an upper panel or wall 15, a lower panel or wall 16, a pair of side panels 9 and lOand a pair of end panels 17 and 18.
First baffle means are provided indicated by refer-ence characters 1 and 2, although more baffles can be uti-lized, if necessary.
Baffle 1 extends downwardly from the upper panel or wall 15 and terminates spaced from the floor 7 and baffle 2 extends upwardly from the floor 7 and terminates spaced 29 from the upper wall 15.
A plurality of tubes 19 are situated in the block within the casing, said tubes being open ended and in spa-ced apart relationship. These terminate spaced from the side walls 9 and 10 as clearly shown in Figure 6.
~B~
The baffles 1 and 2 divide these tubes into three blocks or chambers A, B and C.
An intake fan assembly H is situated in one side wall 10 adjacent one end lOA thereof and may be thermo-statically or otherwise controlled as desired~ This fan also may be of a variable speed type.
It communicates with the interior of the casing as will hereinafter be described.
An intake air or hot air port 6 is situated in the opposite side wall 9 adjacent the opposite end 9A to the end lOA of the side wall 10. This again communicates with the interior of the casing or enclosure as will hereinafter be described.
An exhaust air fan assembly I is provided in one end wall 18 adjacent the upper side thereof and is also thermostatically or otherwise controlled and may be of a variable speed type which picks up exhaust air through the exhaust air intake port 5.
Within the opposite end wall 17 and adjacent the lower side thereof, there is an exhaust air exit port D.
Both the intake assembly H and the exhaust port D may be extended externally of the building (not illustrated) so that fresh air is drawn into the casing by the fan assem-bly H and stale or exhaust air is exhausted externally of ~L2~)Z9S~
the building through the exhaust outlet port D.
Second baffle means 3 and 4 are provided extending from baffles 2 and 1 respectively with the baffle 3 ex-tending from one side of the baffle 2, to the side wall 10 and baffle 4 extending on the opposite side from baffle 1, to the side wall 9.
These define a primary chamber 11 just inboard oE
the intake fan assembly H whereupon air from the intake may pass through the tubes 19 in block C to chamber 12, and thènce through the tubes 19 in block B to the chamber 13 and then again through the tubes lg in block C to chamber 14 which communicates with the hot air outlet port 6 as clearly shown in Figure 6.
This means that the air passing through the tubes 19 move simultaneously from one side towards one side wall and then the other giving the maximum travel of the air through the tubes.
Preheating is by the exhaust air entering the ex-haust fan assembly I through intake port 5 and then pass-ing over the outsides of the tubes, once again passing down-wardly through the tubes in block A and under the parti-tion or baEfle 1 and then upwardly around the tubes 19 in block B and over the baffle 2 and then downwardly arolmd the tubes 19 in block C and finally exiting through the ~,.
Z~;i6 exhaust exit port D, once again travelling simultaneously upwardly and downwardly around baffles 1 and 2.
Thus, the heat chamber A is the primary exhaust cool down, chamber B is the secondary cool down chamber and chamber B is the final cool down chamber.
- Intake air receives its primary warm up in chamber C, secondary warm up in chamber B and final heat transfer in chamber A.
It should be noted that the fresh air exhaust port 6 and exhaust intake port 5 are easily changed to adapt to different types of ducting.
The unit can be built for left or right use by in-terchanging the side panels 9 and 10 together with the baf-fles 3 and 4 and the inlet air port 6 and outlet exhaust port 5 are preferably cylindrical in order to adapt to plastic pipe ducts which arè non-corrosive.
Finally, mention should be made of the sloping floor 7 which collects any condensation which might occur and which can be ducted externally, if desired (not illustra-ted).
The air to air heat exchanger may be made with morechambers such as A, B and C, if desired, as long as the air flow goes through the tubes and through the chambers simultaneously to allow maximum heat transfer.
i~,~
~029~6 The device may be used in livestock buildings or commercial buildings where acids or toxic chemicals are present and o~ co~rse the size can vary to accommodate di-ferent situations or needs.
Since various modifications can be made in our in-vention as hereinabove described, and many apparently wide-ly different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illus-trative only and not in a limiting sense.
``B~
Claims
CLAIMS:
(1) An air to air heat exchanger comprising in com-bination an outer enclosure, a plurality of spaced apart tubes therein forming a plurality of conduits for an in-coming air flow, a plurality of exhaust air flow passes around said tubes, first baffle means between the tubes defining the exhaust air flow passes, an intake fan assem-bly for the incoming air operatively connected to said tubes and an incoming air outlet in said enclosure, an exhaust fan assembly for the exhaust air operatively connected to the exhaust air passes and an exhaust air outlet in said enclosure, and a sloping floor in said enclosure to drain condensate from said exchanger, said enclosure being insula-ted to inhibit condensation therein and to improve the heat transfer characteristics of said heat exchanger.
(2) The heat exchanger according to Claim 1 in which said first baffle means between the tubes defines a plurality of chambers with communication therebetween, said baffle means guiding the exhaust air simultaneously through said enclosure.
(3) The heat exchanger according to Claim 2 in which said first baffle means extends alternatively from the upper side towards the lower side and from the lower side towards the upper side of said enclosure.
(4) The heat exchanger according to Claim 1 in which said tubes and said first baffle means terminates spaced from both sides of walls of said enclosure thereby defining exhaust channels and side of said tubes, and second baffle means extending between said first baffle means and the side walls of said enclosure for guiding said incoming air flow simultaneously through said tubes in said enclosure.
(5) The heat exchanger according to Claim 2 in which said tubes and said first baffle means terminates spaced from both sides of walls of said enclosure thereby defining exhaust channels and side of said tubes, and second baffle means extending between said first baffle means and the side walls of said enclosure for guiding said incoming air flow simultaneously through the sets of tubes in said plu-rality of chambers.
(6) An air to air heat exchanger comprising in combination an enclosure having an upper wall, a lower wall, a pair of side walls, and a pair of end walls, a plurality of spaced apart open ended tubes extending transversely between said side walls but terminating spaced from said side walls, first baffle means extending alternately from the lower wall and the upper wall and terminating spaced from the upper wall and the lower wall respectively, an in-take air fan assembly in one side wall adjacent one end thereof, an intake air outlet in the other side wall adja-cent the opposite end thereof, an exhaust air fan assem-bly in one end wall adjacent one end thereof, and an ex-haust air outlet in the other end wall adjacent the oppo-site end thereof, said first baffle means guiding said in-take air simultaneously through said tubes from one side wall towards the other side wall, said enclosure being in-sulated to inhibit condensation therein and to improve the heat transfer characteristics of said heat exchanger.
(7) The heat exchanger according to Claim 6 which includes a sloping floor in said enclosure to drain con-densate therefrom.
(8) The heat exchanger according to Claim 6 in which said intake air fan assembly is situated between one of said end walls on one of said first baffle means, said intake air outlet being situated between the other of said end walls and another of said first baffle means.
(9) The heat exchanger according to Claim 7 in which said intake air fan assembly is situated between one of said end walls of one of said first baffle means, said intake air outlet being situated between the other of said end walls and another of said first baffle means.
(10) The heat exchanger according to Claim 6 which includes second baffle means extending from one of said first baffle means to one of said side walls and from ano-ther of said first baffle means to the other of said side walls thereby guiding said exhaust air simultaneously bet-ween said tubes from the upper to the lower wall alterna-tively.
(11) The heat exchanger according to Claim 7, 8 or 9 which includes second baffle means extending from one of said first baffle means to one of said side walls and from another of said first baffle means to the other of said side walls thereby guiding said exhaust air simultaneously between said tubes from the upper to the lower wall alter-natively.
(1) An air to air heat exchanger comprising in com-bination an outer enclosure, a plurality of spaced apart tubes therein forming a plurality of conduits for an in-coming air flow, a plurality of exhaust air flow passes around said tubes, first baffle means between the tubes defining the exhaust air flow passes, an intake fan assem-bly for the incoming air operatively connected to said tubes and an incoming air outlet in said enclosure, an exhaust fan assembly for the exhaust air operatively connected to the exhaust air passes and an exhaust air outlet in said enclosure, and a sloping floor in said enclosure to drain condensate from said exchanger, said enclosure being insula-ted to inhibit condensation therein and to improve the heat transfer characteristics of said heat exchanger.
(2) The heat exchanger according to Claim 1 in which said first baffle means between the tubes defines a plurality of chambers with communication therebetween, said baffle means guiding the exhaust air simultaneously through said enclosure.
(3) The heat exchanger according to Claim 2 in which said first baffle means extends alternatively from the upper side towards the lower side and from the lower side towards the upper side of said enclosure.
(4) The heat exchanger according to Claim 1 in which said tubes and said first baffle means terminates spaced from both sides of walls of said enclosure thereby defining exhaust channels and side of said tubes, and second baffle means extending between said first baffle means and the side walls of said enclosure for guiding said incoming air flow simultaneously through said tubes in said enclosure.
(5) The heat exchanger according to Claim 2 in which said tubes and said first baffle means terminates spaced from both sides of walls of said enclosure thereby defining exhaust channels and side of said tubes, and second baffle means extending between said first baffle means and the side walls of said enclosure for guiding said incoming air flow simultaneously through the sets of tubes in said plu-rality of chambers.
(6) An air to air heat exchanger comprising in combination an enclosure having an upper wall, a lower wall, a pair of side walls, and a pair of end walls, a plurality of spaced apart open ended tubes extending transversely between said side walls but terminating spaced from said side walls, first baffle means extending alternately from the lower wall and the upper wall and terminating spaced from the upper wall and the lower wall respectively, an in-take air fan assembly in one side wall adjacent one end thereof, an intake air outlet in the other side wall adja-cent the opposite end thereof, an exhaust air fan assem-bly in one end wall adjacent one end thereof, and an ex-haust air outlet in the other end wall adjacent the oppo-site end thereof, said first baffle means guiding said in-take air simultaneously through said tubes from one side wall towards the other side wall, said enclosure being in-sulated to inhibit condensation therein and to improve the heat transfer characteristics of said heat exchanger.
(7) The heat exchanger according to Claim 6 which includes a sloping floor in said enclosure to drain con-densate therefrom.
(8) The heat exchanger according to Claim 6 in which said intake air fan assembly is situated between one of said end walls on one of said first baffle means, said intake air outlet being situated between the other of said end walls and another of said first baffle means.
(9) The heat exchanger according to Claim 7 in which said intake air fan assembly is situated between one of said end walls of one of said first baffle means, said intake air outlet being situated between the other of said end walls and another of said first baffle means.
(10) The heat exchanger according to Claim 6 which includes second baffle means extending from one of said first baffle means to one of said side walls and from ano-ther of said first baffle means to the other of said side walls thereby guiding said exhaust air simultaneously bet-ween said tubes from the upper to the lower wall alterna-tively.
(11) The heat exchanger according to Claim 7, 8 or 9 which includes second baffle means extending from one of said first baffle means to one of said side walls and from another of said first baffle means to the other of said side walls thereby guiding said exhaust air simultaneously between said tubes from the upper to the lower wall alter-natively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000446873A CA1202956A (en) | 1984-02-24 | 1984-02-24 | Air to air heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000446873A CA1202956A (en) | 1984-02-24 | 1984-02-24 | Air to air heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1202956A true CA1202956A (en) | 1986-04-08 |
Family
ID=4127124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000446873A Expired CA1202956A (en) | 1984-02-24 | 1984-02-24 | Air to air heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1202956A (en) |
-
1984
- 1984-02-24 CA CA000446873A patent/CA1202956A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |