CA1088512A - Heat saving device for use with clothes dryers, vanity drains and the like - Google Patents
Heat saving device for use with clothes dryers, vanity drains and the likeInfo
- Publication number
- CA1088512A CA1088512A CA289,826A CA289826A CA1088512A CA 1088512 A CA1088512 A CA 1088512A CA 289826 A CA289826 A CA 289826A CA 1088512 A CA1088512 A CA 1088512A
- Authority
- CA
- Canada
- Prior art keywords
- water
- storage tank
- heat exchanger
- container
- source
- 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
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
- F24D17/001—Domestic hot-water supply systems using recuperation of waste heat with accumulation of heated water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/20—Sewage water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Water or air from sanitary drains, clothes dryers and the like having a temperature above the temperature of cold water normally entering the hot water tank, is directed through a heat exchanger which includes a coil connected bet-ween the source of cold water and the hot water tank. If connected to waste from a sanitary drain or the like, a tem-perature sensing valve is provided to divert drain water be-low a pre-determined temperature. In both cases, a water storage tank is provided into which the tempered water passes from the heat exchanger and this tank is situated above the heat exchanger. An inlet line extends from the heat exchanger to the storage tank and a circulating line extends from the storage tank to the cold water inlet line leading to the heat exchanger. A one-way valve is situated in this circulating line so that even if water is not being drawn from storage tank, circulation of the water from the storage tank through the heat exchanger, and back, is assured by convection.
Water or air from sanitary drains, clothes dryers and the like having a temperature above the temperature of cold water normally entering the hot water tank, is directed through a heat exchanger which includes a coil connected bet-ween the source of cold water and the hot water tank. If connected to waste from a sanitary drain or the like, a tem-perature sensing valve is provided to divert drain water be-low a pre-determined temperature. In both cases, a water storage tank is provided into which the tempered water passes from the heat exchanger and this tank is situated above the heat exchanger. An inlet line extends from the heat exchanger to the storage tank and a circulating line extends from the storage tank to the cold water inlet line leading to the heat exchanger. A one-way valve is situated in this circulating line so that even if water is not being drawn from storage tank, circulation of the water from the storage tank through the heat exchanger, and back, is assured by convection.
Description
BACKGROUND OF THE INVENTION
This invention relates to new and useful improve-ments in the utilization of waste heat, particularly waste heat which is in exhaust fluids from clothes dryers, sanitary drains and the like.
Normally, this waste heat is not utilized inasmuch as clothes dryers are usually vented exteriorly of the building and sanitary drain water from sinks, dishwashers, baths and the like is diverted directly to the sanitary sewer system.
:~ ?
;.
- . .. . .
s~;~
With the present day energy situation, any saving of such waste heat is desirable.
SUMrlARY OF THE INVENTION
The present invention utilizes such waste heat by passing the waste fluid be it air or water, through a heat ex-changer through which also passes a water carrying element con-nected in series between the conventional cold water inlet to the building and the hot water tank normally used to raise the temperature of this water before use. This means that the water in many instances, is tempered insofar as the temperature is concerned thus utilizing this waste heat and lowering the re-quirements of the source of heat for the hot water tank.
One aspect of the invention consists of a heat exchanger and storage tank assembly to be used in conjunction with a source of heat from waste fluids, including a source of water for said storage tank and a connection from said storage tank to a con-ventional hot water heater tank, said heat exchanger and storage tank assembly comprising in combination a heat exchanger and a storage tank operatively connected thereto, said heat exchanger including a container and a water carrying element therein, in-let conduit means connecting said container to said source of waste fluid, outlet conduit means connected to said container for discharge of said waste fluid after same has passed through said container, said water carrying element within said container having inlet and outlet ends and being in series between said source of water and said storage tank, the water from said source of water flowing through said element and to said storage tank, a water re-circulating conduit extending from said storage tank to the inlet end of said water carrying element, and a one-way valve in said water circulating conduit whereby water flows by convection, from said storage tank to said inlet end of said water carrying element, through said water carrying element and back to said storage tank, said storage tank being situated at a level above said heat exchanger.
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 specification proceeds, my invention consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, reference being had to the accompanying drawings in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic partially cross sectioned view of the invention shown in conjunction with a sanitary drain sys-tem.
Figure 2 is a view similar to Figure 1, but showing the invention incorporated with heated air exhausting from, for example, a clothes dryer.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
.
Proceeding therefore to describe the invention in de-tail, the invention consists of a storage tank 10 and a heat ex-changer assembly collectively designated 11 with the storage tank situated at an elevation above the heat exchanger assembly, the purpose of which will be hereinafter described.
The storage tank is a conventional closed tank having a water inlet conduit 12, a water outlet conduit 13 leading to the conventional hot water tank Inot illustrated) and a circu-lation conduit 14 extending from adjacent the base of the stor-age tank 10, the purpose of which will hereinafter become appar-ent.
The heat exchanger assembly consists of a closed con-tainer 15 having a smaller container 16 situated therein and in the present embodiment, both of these tanks are cylindrical with the smaller tank 16 being substantially concentrically placed within the outer tank 15. However, it will be appreciated that any other convenient shape can be utilized.
The smaller container 16 is secured by the upper end thereof to the upper side 17 of the closed tank 15 and hence is in itself a closed upper ended tank or container.
The lower end 18 of the smaller container terminates 51;~
spaced from the base 19 of the closed container 15 and this lower end 18 is preferably open.
A water carrying element collectively designated 20 is situated within the containers 15 and 16 and preferably takes the form of a copper coil or similar water carrying ele-ment adapted to convey water through the heat exchanger.
In this embodiment, the coil, which may be made from any convenient material, includes a first portion 21 situated within the smaller container 16 and having a plurality of sub-stantially constant pitch and constant diameter coils extending from adjacent the upper end of the smaller container 16 to ad-jacent the lower end 18 thereof whereupon these coils expand in diameter and continue upwardly at the same pitch and substan-tially with the said larger diameter spaced around the smaller container 16 in the volume defined between the smaller container 16 and the closed container 15, said outer coils being identi-fied by reference character 23.
The upper end of the smaller or inner coils 21 is con-nected to a water inlet conduit 24 which in turn is connected to the source of cold water supply (not illustrated) normally pro-vided and the upper end of the outer coils 23 is connected to an outlet conduit 25 which extends to the aforementioned storage tank inlet conduit 12.
l~t~ ~ S 1 ~
A waste fluid inlet conduit 26 is provided and in this embodiment, consists of a conduit extension extending to the associated clothes dryer outlet (not illustrated). This enters the smaller inner container 16 at the upper end 17 there-of.
~ utl~t eollcluit 27 extends from the upper end of the outer casing 15 externally of the smaller casing 16.
The aforementioned circulating conduit 14 connects with the water inlet conduit 12 at the T junction 28 and this conduit 14 is provided with a one-way valve 29 allowing water to move only in the direction of arrow 30.
In operation, and under normal circumstances, water will pass through the hot water heater to the outlet (not il-lustrated) under pressure of water entering the inlet 24,passing through coils 21 and 23 and through the storage tank 10 .
However, when the clothes dryer (not illustrated) is in operation, warm air therefrom at approximately 52C, will enter the heat exchanger and will transfer heat to the water within coils 21 and 23, said water normally entering the coils at approximately 14C.
This, of course, tempers the temperature of the water entering the storage tank 10 and hence the hot water heater tank (not illustrated).
If water is being drawn from the hot water tank 10~
then water will normally flow through the heat exchanger, through the storage tank and hence to the hot water tank, picking up heat from the clothes dryer if it is in operation. However, if water is not being drawn off during the operation of the clothes dryer, the position of the tank 10 superior to that of the heat exchanger 11, will cause water to circulate through con-duit 14, through the coils 21 and 23 and back to the storage tank 10 with one-way valve 29 preventing cold water from entering from the source of cold water. The convection circulation thus set up will gradually raise the temperature of the water within the storage tank 10 so that when it is demanded by the hot water tank, it is already tempered thus requiring less heat from the hot water heater to raise it to the desired temperature.
It should be observed that a condensate drain 31 is provided at the base of container 15 with a P trap 32 therein.
This is necessary since air entering the container 15 will be at approximately 100% relative humidity and air leaving will be at a lower temperature so that condensation and water accumula-tion will occur.
Dealing next with the embodiment shown in Figure 1, where similar parts are utilized, similar reference characters have been used.
In this particular embodiment, the source of waste fluid takes the form of warm water from sinks, baths, dish-washers and the like. It normally passes through a drain ~ -7-10~51~', c~nduit 33 t~ s.ll~it.lly sew~r (l~t illust.rated). In this embodiment, a temperature sensing valve 34 is provided in conduit 33 just prior to same entering the heat exchanger 11 in a position similar to conduit 26. This temperature sensing valve by-passes water passing through conduit 33 which is below a pre-determined temperature, said by-passed water entering the sanitary sewer through the by-pass con-duit 35.
If however, the water is of a sufficient tempera-ture, it enters the heat exchanger and passes therethrough ina manner similar to the air in the previous embodiment, over-flowing through outlet 36 and hence to the sanitary sewer via drain conduit 37.
Otherwise, the operation of this embodiment is iden-tical with that of the previously described embodiment, onceagain tempering the water to the storage tank and hence the water passing to the hot water tank.
Since various modifications can be made in my in-vention as hereinabove described, and many apparently widely 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 illustrative only and not in a limiting sense.
This invention relates to new and useful improve-ments in the utilization of waste heat, particularly waste heat which is in exhaust fluids from clothes dryers, sanitary drains and the like.
Normally, this waste heat is not utilized inasmuch as clothes dryers are usually vented exteriorly of the building and sanitary drain water from sinks, dishwashers, baths and the like is diverted directly to the sanitary sewer system.
:~ ?
;.
- . .. . .
s~;~
With the present day energy situation, any saving of such waste heat is desirable.
SUMrlARY OF THE INVENTION
The present invention utilizes such waste heat by passing the waste fluid be it air or water, through a heat ex-changer through which also passes a water carrying element con-nected in series between the conventional cold water inlet to the building and the hot water tank normally used to raise the temperature of this water before use. This means that the water in many instances, is tempered insofar as the temperature is concerned thus utilizing this waste heat and lowering the re-quirements of the source of heat for the hot water tank.
One aspect of the invention consists of a heat exchanger and storage tank assembly to be used in conjunction with a source of heat from waste fluids, including a source of water for said storage tank and a connection from said storage tank to a con-ventional hot water heater tank, said heat exchanger and storage tank assembly comprising in combination a heat exchanger and a storage tank operatively connected thereto, said heat exchanger including a container and a water carrying element therein, in-let conduit means connecting said container to said source of waste fluid, outlet conduit means connected to said container for discharge of said waste fluid after same has passed through said container, said water carrying element within said container having inlet and outlet ends and being in series between said source of water and said storage tank, the water from said source of water flowing through said element and to said storage tank, a water re-circulating conduit extending from said storage tank to the inlet end of said water carrying element, and a one-way valve in said water circulating conduit whereby water flows by convection, from said storage tank to said inlet end of said water carrying element, through said water carrying element and back to said storage tank, said storage tank being situated at a level above said heat exchanger.
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 specification proceeds, my invention consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, reference being had to the accompanying drawings in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic partially cross sectioned view of the invention shown in conjunction with a sanitary drain sys-tem.
Figure 2 is a view similar to Figure 1, but showing the invention incorporated with heated air exhausting from, for example, a clothes dryer.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
.
Proceeding therefore to describe the invention in de-tail, the invention consists of a storage tank 10 and a heat ex-changer assembly collectively designated 11 with the storage tank situated at an elevation above the heat exchanger assembly, the purpose of which will be hereinafter described.
The storage tank is a conventional closed tank having a water inlet conduit 12, a water outlet conduit 13 leading to the conventional hot water tank Inot illustrated) and a circu-lation conduit 14 extending from adjacent the base of the stor-age tank 10, the purpose of which will hereinafter become appar-ent.
The heat exchanger assembly consists of a closed con-tainer 15 having a smaller container 16 situated therein and in the present embodiment, both of these tanks are cylindrical with the smaller tank 16 being substantially concentrically placed within the outer tank 15. However, it will be appreciated that any other convenient shape can be utilized.
The smaller container 16 is secured by the upper end thereof to the upper side 17 of the closed tank 15 and hence is in itself a closed upper ended tank or container.
The lower end 18 of the smaller container terminates 51;~
spaced from the base 19 of the closed container 15 and this lower end 18 is preferably open.
A water carrying element collectively designated 20 is situated within the containers 15 and 16 and preferably takes the form of a copper coil or similar water carrying ele-ment adapted to convey water through the heat exchanger.
In this embodiment, the coil, which may be made from any convenient material, includes a first portion 21 situated within the smaller container 16 and having a plurality of sub-stantially constant pitch and constant diameter coils extending from adjacent the upper end of the smaller container 16 to ad-jacent the lower end 18 thereof whereupon these coils expand in diameter and continue upwardly at the same pitch and substan-tially with the said larger diameter spaced around the smaller container 16 in the volume defined between the smaller container 16 and the closed container 15, said outer coils being identi-fied by reference character 23.
The upper end of the smaller or inner coils 21 is con-nected to a water inlet conduit 24 which in turn is connected to the source of cold water supply (not illustrated) normally pro-vided and the upper end of the outer coils 23 is connected to an outlet conduit 25 which extends to the aforementioned storage tank inlet conduit 12.
l~t~ ~ S 1 ~
A waste fluid inlet conduit 26 is provided and in this embodiment, consists of a conduit extension extending to the associated clothes dryer outlet (not illustrated). This enters the smaller inner container 16 at the upper end 17 there-of.
~ utl~t eollcluit 27 extends from the upper end of the outer casing 15 externally of the smaller casing 16.
The aforementioned circulating conduit 14 connects with the water inlet conduit 12 at the T junction 28 and this conduit 14 is provided with a one-way valve 29 allowing water to move only in the direction of arrow 30.
In operation, and under normal circumstances, water will pass through the hot water heater to the outlet (not il-lustrated) under pressure of water entering the inlet 24,passing through coils 21 and 23 and through the storage tank 10 .
However, when the clothes dryer (not illustrated) is in operation, warm air therefrom at approximately 52C, will enter the heat exchanger and will transfer heat to the water within coils 21 and 23, said water normally entering the coils at approximately 14C.
This, of course, tempers the temperature of the water entering the storage tank 10 and hence the hot water heater tank (not illustrated).
If water is being drawn from the hot water tank 10~
then water will normally flow through the heat exchanger, through the storage tank and hence to the hot water tank, picking up heat from the clothes dryer if it is in operation. However, if water is not being drawn off during the operation of the clothes dryer, the position of the tank 10 superior to that of the heat exchanger 11, will cause water to circulate through con-duit 14, through the coils 21 and 23 and back to the storage tank 10 with one-way valve 29 preventing cold water from entering from the source of cold water. The convection circulation thus set up will gradually raise the temperature of the water within the storage tank 10 so that when it is demanded by the hot water tank, it is already tempered thus requiring less heat from the hot water heater to raise it to the desired temperature.
It should be observed that a condensate drain 31 is provided at the base of container 15 with a P trap 32 therein.
This is necessary since air entering the container 15 will be at approximately 100% relative humidity and air leaving will be at a lower temperature so that condensation and water accumula-tion will occur.
Dealing next with the embodiment shown in Figure 1, where similar parts are utilized, similar reference characters have been used.
In this particular embodiment, the source of waste fluid takes the form of warm water from sinks, baths, dish-washers and the like. It normally passes through a drain ~ -7-10~51~', c~nduit 33 t~ s.ll~it.lly sew~r (l~t illust.rated). In this embodiment, a temperature sensing valve 34 is provided in conduit 33 just prior to same entering the heat exchanger 11 in a position similar to conduit 26. This temperature sensing valve by-passes water passing through conduit 33 which is below a pre-determined temperature, said by-passed water entering the sanitary sewer through the by-pass con-duit 35.
If however, the water is of a sufficient tempera-ture, it enters the heat exchanger and passes therethrough ina manner similar to the air in the previous embodiment, over-flowing through outlet 36 and hence to the sanitary sewer via drain conduit 37.
Otherwise, the operation of this embodiment is iden-tical with that of the previously described embodiment, onceagain tempering the water to the storage tank and hence the water passing to the hot water tank.
Since various modifications can be made in my in-vention as hereinabove described, and many apparently widely 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 illustrative only and not in a limiting sense.
Claims
WHAT I CLAIM AS MY INVENTION IS:
(1) A heat exchanger and storage tank assembly to be used in conjunction with a source of heat from waste fluids, in-cluding a source of water for said storage tank and a connection from said storage tank to a conventional hot water heater tank, said heat exchanger and storage tank assembly comprising in com-bination a heat exchanger and a storage tank operatively connect-ed thereto, said heat exchanger including a container and a water carrying element therein, inlet conduit means connecting said container to said source of waste fluid, outlet conduit means connected to said container for discharge of said waste fluid after same has passed through said container, said water carry-ing element within said container having inlet and outlet ends and being in series between said source of water and said storage tank, the water from said source of water flowing through said element and to said storage tank, a water re-circulating conduit extending from said storage tank to the inlet end of said water carrying element, and a one-way valve in said water circulating conduit whereby water flows by convection, from said storage tank to said inlet end of said water carrying element, through said water carrying element and back to said storage tank, said stor-age tank being situated at a level above said heat exchanger.
(2) The invention according to Claim 1 in which said container of said heat exchanger is in the form of a closed con-tainer, a smaller container therein enclosed at the upper end and having a lower end terminating spaced from the base of said closed container, said smaller container communicating with said closed container via the base of said smaller container, said water carrying element extending through said smaller container and continuing around said smaller container in the space between said smaller container and said closed container.
(3) The invention according to Claim 2 in which said water carrying element comprises a coil having a portion thereof of substantially constant pitch and constant diameter situated within said smaller container and a portion of substantially constant pitch and a larger constant diameter than said first mentioned portion, said last mentioned portion extending around the outside of said smaller container.
(4) The invention according to Claim 1 in which said source of waste fluid comprises a clothes dryer, the exhaust air thereof constituting said waste fluid.
(5) The invention according to Claim 2 in which said source of waste fluid comprises a clothes dryer, the exhaust air thereof constituting said waste fluid.
(6) The invention according to Claim 3 in which said source of waste fluid comprises a clothes dryer, the exhaust air thereof constituting said waste fluid.
(7) The invention according to Claim 1 in which said source of waste fluid comprises sanitary waste water from sinks, baths and the like and being connected to said inlet conduit means, and a temperature sensing valve in said inlet conduit means to by-pass said waste water from said heat exchanger, if the temperature of said waste water is below a predetermined minimum.
(8) The invention according to Claim 2 in which said source of waste fluid comprises sanitary waste water from sinks, baths and the like and being connected to said inlet conduit means, and a temperature sensing valve in said inlet conduit means to by-pass said waste water from said heat exchanger, if the temperature of said waste water is below a predetermined minimum.
(9) The invention according to Claim 3 in which said source of waste fluid comprises sanitary waste water from sinks, baths and the like and being connected to said inlet conduit means, and a temperature sensing valve in said inlet conduit means to by-pass said waste water from said heat exchanger, if the temperature of said waste water is below a predetermined minimum.
(1) A heat exchanger and storage tank assembly to be used in conjunction with a source of heat from waste fluids, in-cluding a source of water for said storage tank and a connection from said storage tank to a conventional hot water heater tank, said heat exchanger and storage tank assembly comprising in com-bination a heat exchanger and a storage tank operatively connect-ed thereto, said heat exchanger including a container and a water carrying element therein, inlet conduit means connecting said container to said source of waste fluid, outlet conduit means connected to said container for discharge of said waste fluid after same has passed through said container, said water carry-ing element within said container having inlet and outlet ends and being in series between said source of water and said storage tank, the water from said source of water flowing through said element and to said storage tank, a water re-circulating conduit extending from said storage tank to the inlet end of said water carrying element, and a one-way valve in said water circulating conduit whereby water flows by convection, from said storage tank to said inlet end of said water carrying element, through said water carrying element and back to said storage tank, said stor-age tank being situated at a level above said heat exchanger.
(2) The invention according to Claim 1 in which said container of said heat exchanger is in the form of a closed con-tainer, a smaller container therein enclosed at the upper end and having a lower end terminating spaced from the base of said closed container, said smaller container communicating with said closed container via the base of said smaller container, said water carrying element extending through said smaller container and continuing around said smaller container in the space between said smaller container and said closed container.
(3) The invention according to Claim 2 in which said water carrying element comprises a coil having a portion thereof of substantially constant pitch and constant diameter situated within said smaller container and a portion of substantially constant pitch and a larger constant diameter than said first mentioned portion, said last mentioned portion extending around the outside of said smaller container.
(4) The invention according to Claim 1 in which said source of waste fluid comprises a clothes dryer, the exhaust air thereof constituting said waste fluid.
(5) The invention according to Claim 2 in which said source of waste fluid comprises a clothes dryer, the exhaust air thereof constituting said waste fluid.
(6) The invention according to Claim 3 in which said source of waste fluid comprises a clothes dryer, the exhaust air thereof constituting said waste fluid.
(7) The invention according to Claim 1 in which said source of waste fluid comprises sanitary waste water from sinks, baths and the like and being connected to said inlet conduit means, and a temperature sensing valve in said inlet conduit means to by-pass said waste water from said heat exchanger, if the temperature of said waste water is below a predetermined minimum.
(8) The invention according to Claim 2 in which said source of waste fluid comprises sanitary waste water from sinks, baths and the like and being connected to said inlet conduit means, and a temperature sensing valve in said inlet conduit means to by-pass said waste water from said heat exchanger, if the temperature of said waste water is below a predetermined minimum.
(9) The invention according to Claim 3 in which said source of waste fluid comprises sanitary waste water from sinks, baths and the like and being connected to said inlet conduit means, and a temperature sensing valve in said inlet conduit means to by-pass said waste water from said heat exchanger, if the temperature of said waste water is below a predetermined minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA289,826A CA1088512A (en) | 1977-10-28 | 1977-10-28 | Heat saving device for use with clothes dryers, vanity drains and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA289,826A CA1088512A (en) | 1977-10-28 | 1977-10-28 | Heat saving device for use with clothes dryers, vanity drains and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1088512A true CA1088512A (en) | 1980-10-28 |
Family
ID=4109895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA289,826A Expired CA1088512A (en) | 1977-10-28 | 1977-10-28 | Heat saving device for use with clothes dryers, vanity drains and the like |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1088512A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993007424A1 (en) * | 1991-10-04 | 1993-04-15 | Egmont Bartl | Plant for recuperating heat from waste waster |
| AT397114B (en) * | 1991-10-01 | 1994-02-25 | Galhaup Karl Dr | Apparatus for the combined utilization of used water and waste heat from waste water |
| FR2823837A1 (en) * | 2001-04-20 | 2002-10-25 | Jean Louis Puzio | Thermal energy recovery device of bathroom installation waste hot water comprises heat exchanger with primary inlet connected to waste hot water tank, secondary inlet and outlet connected to cold water supply and hot water storage tank |
-
1977
- 1977-10-28 CA CA289,826A patent/CA1088512A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT397114B (en) * | 1991-10-01 | 1994-02-25 | Galhaup Karl Dr | Apparatus for the combined utilization of used water and waste heat from waste water |
| WO1993007424A1 (en) * | 1991-10-04 | 1993-04-15 | Egmont Bartl | Plant for recuperating heat from waste waster |
| FR2823837A1 (en) * | 2001-04-20 | 2002-10-25 | Jean Louis Puzio | Thermal energy recovery device of bathroom installation waste hot water comprises heat exchanger with primary inlet connected to waste hot water tank, secondary inlet and outlet connected to cold water supply and hot water storage tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |