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US3627033A - Air heaters with enclosing dampers for protection against freezing - Google Patents

Air heaters with enclosing dampers for protection against freezing Download PDF

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Publication number
US3627033A
US3627033A US864002A US3627033DA US3627033A US 3627033 A US3627033 A US 3627033A US 864002 A US864002 A US 864002A US 3627033D A US3627033D A US 3627033DA US 3627033 A US3627033 A US 3627033A
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United States
Prior art keywords
heat exchangers
dampers
gas
sides
conduit
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Expired - Lifetime
Application number
US864002A
Inventor
Clarence L Ringquist
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Trane US Inc
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Trane Co
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Assigned to TRANE COMPANY, THE reassignment TRANE COMPANY, THE MERGER (SEE DOCUMENT FOR DETAILS). DELAWARE, EFFECTIVE FEB. 24, 1984 Assignors: A-S CAPITAL INC. A CORP OF DE
Assigned to TRANE COMPANY THE reassignment TRANE COMPANY THE MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE 12/1/83 WISCONSIN Assignors: A-S CAPITAL INC., A CORP OF DE (CHANGED TO), TRANE COMPANY THE, A CORP OF WI (INTO)
Assigned to AMERICAN STANDARD INC., A CORP OF DE reassignment AMERICAN STANDARD INC., A CORP OF DE MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE 12/28/84 DELAWARE Assignors: A-S SALEM INC., A CORP. OF DE (MERGED INTO), TRANE COMPANY, THE
Assigned to A-S CAPITAL INC., A CORP OF DE reassignment A-S CAPITAL INC., A CORP OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: TRANE COMPANY THE A WI CORP
Assigned to BANKERS TRUST COMPANY reassignment BANKERS TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN STANDARD INC., A DE. CORP.,
Assigned to BANKERS TRUST COMPANY reassignment BANKERS TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRANE AIR CONDITIONING COMPANY, A DE CORP.
Anticipated expiration legal-status Critical
Assigned to CHEMICAL BANK, AS COLLATERAL AGENT reassignment CHEMICAL BANK, AS COLLATERAL AGENT ASSIGNMENT OF SECURITY INTEREST Assignors: BANKERS TRUST COMPANY, AS COLLATERAL TRUSTEE
Assigned to AMERICAN STANDARD, INC. reassignment AMERICAN STANDARD, INC. RELEASE OF SECURITY INTEREST (RE-RECORD TO CORRECT DUPLICATES SUBMITTED BY CUSTOMER. THE NEW SCHEDULE CHANGES THE TOTAL NUMBER OF PROPERTY NUMBERS INVOLVED FROM 1133 TO 794. THIS RELEASE OF SECURITY INTEREST WAS PREVIOUSLY RECORDED AT REEL 8869, FRAME 0001.) Assignors: CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK)
Assigned to AMERICAN STANDARD, INC. reassignment AMERICAN STANDARD, INC. RELEASE OF SECURITY INTEREST Assignors: CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK)
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/33—Control of dampers

Definitions

  • FIG. 1 is a sectional view on a horizontal plane taken on line 1-1 ofFlG. 2;and
  • FIG. 2 is a vertical sectional view taken on line 2--2 of FIG. 1.
  • numeral designates a conduit connected to receive air or other gas to be heated.
  • the air flowing through duct 10 may be all outside air of a mixture of outside air and building air.
  • the direction of flow of air is indicated by arrows 12.
  • a heat exchanger 14 has a casing 15 which has flanges 16 secured in fluidtight engagement with flanges 18 on the conduit 10.
  • Heat exchanger 14 has a header 20 for receiving heat exchange fluid such as steam or water from a suitable source such as a boiler not shown.
  • Heat exhanger 14 also has a return header 22 for returning heat exchange fluid to the boiler or other source.
  • Heat exchange tubes 24 extend between and conduct heat exchange fluid from header 20 to header 22.
  • a plurality of heat exchange fins 24 are mounted on the tubes 24 in good heat exchange contact therewith.
  • the heat exchanger as illustrated has three tube and fin bundles 26, 28, and 30. However, it should be understood that there may be more or less bundles. These tube and fin bundles are spaced from each other and from the top and bottom wall of the casing 15 whereby air may flow between the bundles and between the bundles and the sides of casing 15.
  • Each of the bundles 26, 28, and have upstream walls 32 and downstream walls 34 to permit the flow of air through the bundles only in a direction transverse to the direction of flow 12 through the duct.
  • Dampers 36 are pivotably mounted at 38 to the upstreamed walls 30 at 40.
  • Dampers 42 are pivotably mounted at 44 to the downstream walls 32 at 46.
  • the dampers 36 and 40 may be provided with sealing strips 48 of flexible material to prevent leakage of air.
  • cranks 50 are secured to dampers 36 and cranks 50 are pivotably secured to rods 52 for movement thereby.
  • cranks 54 are secured to dampers 40 and cranks 56 are pivotably secured to rods 56 for movement thereby.
  • Rods 52 and'56 are slidably mounted in the casing 15 and pivotably mounted with respect to an arm 58 which is pivotably mounted at 60 on the casing 15.
  • a thennostat 62 of the pneumatic type receives air pressure from a source 64 and has a temperature sensing bulb 66 of the averaging type.
  • the thermostat 62 reduces the pressure transmitted to the an operated damper motor 68 and the damper motor moves the arm 58 in a direction to move the dampers 40 and 26 toward the closed position with respect to the fin and tube bundles 26, 28, and 30.
  • Gas conditioning apparatus comprising conduit having a first open end for receiving gas to be heated and a second open end for discharging heated gas, a plurality of heat exchangers in said conduit in the path of the flow of gas therethrough, means for conducting a heating fluid through said heat exchangers, said heat exchangers having four sides in the path of flow including substantially closed upstream sides and substantially closed downstream sides, said heat exchangers being spaced from each other and from opposite walls of said conduit for the flow of gas between said heat exchangers and between said heat exchangers and said opposite walls of said conduit, dampers to open and close the other two sides of said heat exchangers to respectively pass the gas through the heat exchangers or to pass the gas between said heat exchangers, said dampers being arranged on both sides of said heat exchangers, means pivotably mounting adjacent dampers on the upstream and downstream sides whereby the gas to be conditioned is passed between the heat exchangers and the walls of the conduit when said dampers are in closing position with respect to the heat exchanger sides and whereby the gas is passed through the heat
  • thermostatic control means responsive to the temperature downstream of said heat exchangers for controlling said dampers to maintain a substantially constant temperature of gas leaving said heat exchanger.

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  • 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)
  • Air-Flow Control Members (AREA)

Abstract

Apparatus for heating outside air having dampers which can be adjusted to fully enclose the heat exchange surfaces to reduce the heating effect without reducing the flow of heat exchange medium. The risk of damage to the coil from freezing is thereby eliminated.

Description

United States Patent Inventor App]. No.
Filed Patented Assignee Clarence L. RIngquIst La Crosse, Wls. 864,002
Oct. 6, 1969 Dec. 14, 1971 The Trane Company La Crosse, Wis.
AIR HEATERS WITH ENCLOSING DAMPERS FOR PROTECTION AGAINST FREEZING 2 Claims, 2 Drawing Figs.
Int. Cl
B60h 1/00 Field of Search [56] References Cited UNITED STATES PATENTS 3,107,724 10/1963 Horn et a1 165/103 3,390,719 7/1968 McCallister 165/103 Primary Examiner-Charles Sukalo Attorneys-Arthur 0. Andersen and Carl M. Lewis ABSTRACT: Apparatus for heating outside air having dampers which can be adjusted to fully enclose the heat exchange surfaces to reduce the heating effect without reducing the flow of heat exchange medium. The risk of damage to the coil from freezing is thereby eliminated.
Patented Dec. 14, 1971 K! I II/ FIG. I
IUI
FIG. 2
64 \INVENTOR.
I CLARENCE L. RINGOUIST ATTORNEY AIR HEATERS WITH ENCLOSING DAMPERS FOR PROTECTION AGAINST FREEZING BACKGROUND OF THE INVENTION With heaters for heating outside air admitted to a building heating system or for heating a mixture of outside air and recirculated air, it has been common practice to modulate the flow of steam or hot water to obtain the desired air temperature. This often results in freezing and extensive damage to the heat exchanger.
SUMMARY OF THE INVENTION In order to prevent damage to heat exchangers] provide dampers to vary the flow of air through the heat exchangers and thus the amount of the air bypassing the heat exchanger to obtain the desired temperature of air. With this control the flow of heat exchange fluid such as steam or hot water can be maintained at a magnitude sufficient to prevent freezing in the heat exchanger.
Other objects and advantages will become apparent as this specification proceeds to describe the invention in detail with reference to the accompanying drawings wherein like elements have been designated by like numerals throughout and in which:
FIG. 1 is a sectional view on a horizontal plane taken on line 1-1 ofFlG. 2;and
FIG. 2 is a vertical sectional view taken on line 2--2 of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings numeral designates a conduit connected to receive air or other gas to be heated. The air flowing through duct 10 may be all outside air of a mixture of outside air and building air. The direction of flow of air is indicated by arrows 12.
A heat exchanger 14 has a casing 15 which has flanges 16 secured in fluidtight engagement with flanges 18 on the conduit 10. Heat exchanger 14 has a header 20 for receiving heat exchange fluid such as steam or water from a suitable source such as a boiler not shown.
Heat exhanger 14 also has a return header 22 for returning heat exchange fluid to the boiler or other source.
Heat exchange tubes 24 extend between and conduct heat exchange fluid from header 20 to header 22. A plurality of heat exchange fins 24 are mounted on the tubes 24 in good heat exchange contact therewith.
The heat exchanger as illustrated has three tube and fin bundles 26, 28, and 30. However, it should be understood that there may be more or less bundles. These tube and fin bundles are spaced from each other and from the top and bottom wall of the casing 15 whereby air may flow between the bundles and between the bundles and the sides of casing 15.
Each of the bundles 26, 28, and have upstream walls 32 and downstream walls 34 to permit the flow of air through the bundles only in a direction transverse to the direction of flow 12 through the duct.
Dampers 36 are pivotably mounted at 38 to the upstreamed walls 30 at 40. Dampers 42 are pivotably mounted at 44 to the downstream walls 32 at 46. The dampers 36 and 40 may be provided with sealing strips 48 of flexible material to prevent leakage of air.
Cranks 50 are secured to dampers 36 and cranks 50 are pivotably secured to rods 52 for movement thereby.
Cranks 54 are secured to dampers 40 and cranks 56 are pivotably secured to rods 56 for movement thereby.
Rods 52 and'56 are slidably mounted in the casing 15 and pivotably mounted with respect to an arm 58 which is pivotably mounted at 60 on the casing 15.
A thennostat 62 of the pneumatic type receives air pressure from a source 64 and has a temperature sensing bulb 66 of the averaging type.
If the temperature of air at the bulb 66 tends to exceed the desired temperature the thermostat 62 reduces the pressure transmitted to the an operated damper motor 68 and the damper motor moves the arm 58 in a direction to move the dampers 40 and 26 toward the closed position with respect to the fin and tube bundles 26, 28, and 30.
Although not shown and described, the well-known electrical controls could obviously be used in place thereof.
Although preferred embodiments of my invention have been shown and described, it is contemplated that many changes may be made without departing from the scope or spirit of my invention and I desire to be limited only by the claims.
Iclaim:
1. Gas conditioning apparatus comprising conduit having a first open end for receiving gas to be heated and a second open end for discharging heated gas, a plurality of heat exchangers in said conduit in the path of the flow of gas therethrough, means for conducting a heating fluid through said heat exchangers, said heat exchangers having four sides in the path of flow including substantially closed upstream sides and substantially closed downstream sides, said heat exchangers being spaced from each other and from opposite walls of said conduit for the flow of gas between said heat exchangers and between said heat exchangers and said opposite walls of said conduit, dampers to open and close the other two sides of said heat exchangers to respectively pass the gas through the heat exchangers or to pass the gas between said heat exchangers, said dampers being arranged on both sides of said heat exchangers, means pivotably mounting adjacent dampers on the upstream and downstream sides whereby the gas to be conditioned is passed between the heat exchangers and the walls of the conduit when said dampers are in closing position with respect to the heat exchanger sides and whereby the gas is passed through the heat exchangers when the dampers are pivoted away from the walls of said heat exchangers.
2. The apparatus of claim 1 including thermostatic control means responsive to the temperature downstream of said heat exchangers for controlling said dampers to maintain a substantially constant temperature of gas leaving said heat exchanger.
i t t t t IIIIIHA

Claims (2)

1. Gas conditioning apparatus comprising conduit having a first open end for receiving gas to be heated and a second open end for discharging heated gas, a plurality of heat exchangers in said conduit in the path of the flow of gas therethrough, means for conducting a heating fluid through said heat exchangers, said heat exchangers having four sides in the path of flow including substantially closed upstream sides and substantially closed downstream sides, said heat exchangers being spaced from each other and from opposite walls of said conduit for the flow of gas between said heat exchangers and between said heat exchangers and said opposite walls of said conduit, dampers to open and close the other two sides of said heat exchangers to respectively pass the gas through the heat exchangers or to pass the gas between said heat exchangers, said dampers being arranged on both sides of said heat exchangers, means pivotably mounting adjacent dampers on the upstream and downstream sides whereby the gas to be conditioned is passed between the heat exchangers and the walls of the conduit when said dampers are in closing position with respect to the heat exchanger sides and whereby the gas is passed through the heat exchangers when the dampers are pivoted away from the walls of said heat exchangers.
2. The apparatus of claim 1 including thermostatic control means responsive to the temperature downstream of said heat exchangers for controlling said dampers to maintain a substantially constant temperature of gas leaving said heat exchanger.
US864002A 1969-10-06 1969-10-06 Air heaters with enclosing dampers for protection against freezing Expired - Lifetime US3627033A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823768A (en) * 1973-01-31 1974-07-16 Sioux Steam Cleaner Corp Air conditioning apparatus
US3943995A (en) * 1974-02-19 1976-03-16 Banko Edward J Damper arrangement for controlling air or fluid flow
US4064934A (en) * 1975-11-07 1977-12-27 International Harvester Company Radiator air flow control mechanism
US4116265A (en) * 1977-06-24 1978-09-26 Caterpillar Tractor Co. Heat exchanger having controllable cleaning means
US4284132A (en) * 1976-10-12 1981-08-18 Strand Sr Charles A Apparatus for conditioning air
US4367787A (en) * 1980-05-16 1983-01-11 Haden Schweitzer Corporation Air conditioning apparatus and method for paint spray booths
US5214935A (en) * 1990-02-20 1993-06-01 Allied-Signal Inc. Fluid conditioning apparatus and system
US20050189430A1 (en) * 2004-02-26 2005-09-01 Mestek, Inc. Multi-zone integral face bypass coil system
US20070125521A1 (en) * 2005-12-06 2007-06-07 Denso Corporation Heat exchanger and air conditioner
US20220349620A1 (en) * 2019-08-08 2022-11-03 Eco-Tech Ceram Heat-generating assembly and method for controlling the assembly

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823768A (en) * 1973-01-31 1974-07-16 Sioux Steam Cleaner Corp Air conditioning apparatus
US3943995A (en) * 1974-02-19 1976-03-16 Banko Edward J Damper arrangement for controlling air or fluid flow
US4064934A (en) * 1975-11-07 1977-12-27 International Harvester Company Radiator air flow control mechanism
US4284132A (en) * 1976-10-12 1981-08-18 Strand Sr Charles A Apparatus for conditioning air
US4116265A (en) * 1977-06-24 1978-09-26 Caterpillar Tractor Co. Heat exchanger having controllable cleaning means
US4367787A (en) * 1980-05-16 1983-01-11 Haden Schweitzer Corporation Air conditioning apparatus and method for paint spray booths
US5214935A (en) * 1990-02-20 1993-06-01 Allied-Signal Inc. Fluid conditioning apparatus and system
US20050189430A1 (en) * 2004-02-26 2005-09-01 Mestek, Inc. Multi-zone integral face bypass coil system
US20070125521A1 (en) * 2005-12-06 2007-06-07 Denso Corporation Heat exchanger and air conditioner
US7931074B2 (en) * 2005-12-06 2011-04-26 Denso Corporation Heat exchanger and air conditioner
US20110162819A1 (en) * 2005-12-06 2011-07-07 Denso Corporation Heat exchanger and air conditioner
US20220349620A1 (en) * 2019-08-08 2022-11-03 Eco-Tech Ceram Heat-generating assembly and method for controlling the assembly

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AS Assignment

Owner name: TRANE COMPANY, THE

Free format text: MERGER;ASSIGNOR:A-S CAPITAL INC. A CORP OF DE;REEL/FRAME:004334/0523

AS Assignment

Owner name: TRANE COMPANY THE

Free format text: MERGER;ASSIGNORS:TRANE COMPANY THE, A CORP OF WI (INTO);A-S CAPITAL INC., A CORP OF DE (CHANGED TO);REEL/FRAME:004372/0370

Effective date: 19840224

Owner name: AMERICAN STANDARD INC., A CORP OF DE

Free format text: MERGER;ASSIGNORS:TRANE COMPANY, THE;A-S SALEM INC., A CORP. OF DE (MERGED INTO);REEL/FRAME:004372/0349

Effective date: 19841226

AS Assignment

Owner name: A-S CAPITAL INC., A CORP OF DE

Free format text: MERGER;ASSIGNOR:TRANE COMPANY THE A WI CORP;REEL/FRAME:004432/0765

Effective date: 19840224

AS Assignment

Owner name: BANKERS TRUST COMPANY, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213

Effective date: 19880624

Owner name: BANKERS TRUST COMPANY, 4 ALBANY STREET, 9TH FLOOR,

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Effective date: 19880624

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Effective date: 19930601

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Owner name: AMERICAN STANDARD, INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST (RE-RECORD TO CORRECT DUPLICATES SUBMITTED BY CUSTOMER. THE NEW SCHEDULE CHANGES THE TOTAL NUMBER OF PROPERTY NUMBERS INVOLVED FROM 1133 TO 794. THIS RELEASE OF SECURITY INTEREST WAS PREVIOUSLY RECORDED AT REEL 8869, FRAME 0001.);ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:009123/0300

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