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Class 126/588 - Freezing prevention


Subclass of Class 126 - Stoves and furnaces
Definition: Apparatus wherein in response to the sensed temperature
No. of patents: 70
Last issue date: 09/15/1998


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NumberTitleIssue Date
5806511Method and apparatus to provide freeze protection for solar water heating systems
A method and apparatus is described to prevent freezing in the piping and tank of a solar water heating system mounted above a heated space. The supply and return piping to the solar water heater is used in conjunction with a heat exchanger mounted within...
09/15/1998
5575276Solar thermal water heating system
A solar thermal water heating system including a solar collector unit, first and second heat exchangers, and a drain back tank, ordered respectively in vertically descending relation. The solar energy collector comprises a plurality of heat absorbing modu...
11/19/1996
5413091Solar collector with freeze damage protection
A flat plate solar collector (10) of the header/riser type housed in a glazed collector enclosure (14) and having liquid conduits comprising risers (24) intercommunicating with headers (22, 26) at both ends of the risers. The risers are tapered and the he...
05/09/1995
5333677Evacuated two-phase head-transfer systems
Various techniques are disclosed for improving systems that include an evacuated, and in essence hermetically-sealed, fluid circuit containing a heat-transfer fluid which--while circulating, usually with the assistance of a pump, around the fluid circuit-...
08/02/1994
5074282Solar water heater
A solar water heater absorber with controllable freeze damage is described, the absorber having removable heat absorbing panels attached on opposite sides to each riser, each panel having a flat portion to receive the sun's rays and a folded curved portio...
12/24/1991
4930492Solar water heating system
A solar water heating system comprising a solar energy collector which comprises a solar energy absorber communicating with a fluid distribution manifold, a drainback tank communicating with the distribution manifold for collecting drainage fluid from the...
06/05/1990
4681088Freeze protection valve for solar heaters
An automatic freeze protection valve apparatus for solar heaters is provided with a remote sensing element, remote from the valve itself and which operates in a non-modulating fashion. The valve includes a valve housing with a remote sensor operatively co...
07/21/1987
4672990System for freeze protection of pipes
A system for freeze protection of pipes is provided, comprising a cold water supply line, connected to a main water supply line at one end and to at least one cold water fixture at the other end; a hot water tank having an inlet and an outlet; a hot water...
06/16/1987
4644935Solar heater control
A solar heater control system is disclosed for use with a water reservoir and a solar collector. Forced circulation of water in the solar heater system is provided by a pump, and valve means provides direct control of water flow in various parts of the so...
02/24/1987
4637375Integrated solar heating unit
The instant solar heating unit takes advantage of anti-reverse-siphon techniques developed by the inventor and combines anti-freeze features, and houses the entire unit in a wedge-shaped, integral cocoon to retain heat and enclose the piping and fixtures....
01/20/1987
4621679Water system valve for draining heat exchangers
A valve (10) for a water temperature control system having a heat exchanger (C), a tank (T), and a pump (P) for circulating heat transfer fluid through a supply line (11, 12, 13) from the tank to the heat exchanger and through a return line (14, 15) from ...
11/11/1986
4611577Black-water solar disk
A flat circular plate glass window and a conical circular metal disk mounted below the window so as to form an expansion chamber through which a black-dye solution of water and alcohol circulates. Water enters the chamber through a 1 mm peripheral gap bet...
09/16/1986
4599994Thermosiphon solar water heater having freeze rupture protection
A thermosiphon solar water heating system includes a solar energy collector coupled to an elevated heated water storage tank. Water at about 4° C. is produced and used to displace colder, less dense water in the solar collector, thereby establishing circ...
07/15/1986
4557252Freeze protection valve and system
The present invention is a device for a solar heating system having a solar collector, a storage tank connected to the solar collector, a pump for circulating liquid from the tank to the solar collector, a supply of liquid at a temperature above freezing ...
12/10/1985
4541448Freeze protection valve with metal to plastic fitting design
The freeze protection valve includes a molded plastic valve housing (A) including a peripheral wall (10) which defines an elongated recess (12) therein. The valve housing includes a first seating region (18) surrounding the elongated recess open end, a dr...
09/17/1985
4541412Check valve and spring to prevent forward and reverse thermosiphoning in solar collector systems
A freeze protection system allows the working fluid contained in the communicating tubes of the solar collector to drain from both the input and output tubes of the collector when a first predetermined temperature of the working fluid is detected and to f...
09/17/1985
4519383Anti-reverse siphon solar heating system
A solar heater which is adapted for liquid heating and space heating, or both, utilizes a passive anti-reverse siphon concept in which fresh air or water is required to traverse upwardly along a passageway and then descend along a descending passageway in...
05/28/1985
4505261Modular passive solar heating system
A modular passive solar energy storage system comprises a plurality of heat tubes which are arranged to form a flat plate solar collector and are releasably connected to a water reservoir by, and are part of, double-walled heat exchangers which penetrate ...
03/19/1985
4479487Apparatus for solar water heating
A solar water heating system comprises a solar collector having coils consisting of several stages, some of the coils having transparent covers having different heat insulation effects increasing with the temperature in the coil stages. Water is introduce...
10/30/1984
4460006Freeze protection valve
The freeze protection valve includes a valve housing (A) which has a bore (20) through a lower wall portion (22) thereof to define a freeze drain outlet (B). A valve assembly (C) including a valve cup (50), a valving element (54), and a valve element bias...
07/17/1984
4457326System for providing temporary water service between a water main and one or more locations normally connected to the main
A system for providing temporary water service between a water main and one or more locations normally connected to the main in which a pipeline is provided above ground and has a supply section and a return section which are connected to the main. Each o...
07/03/1984
4454890Solar heater system and valve
A Solar Heater system including an absorber panel having an inlet and an outlet connected to a water supply tank. A valve is located in both the inlet and outlet connections and at least the inlet valve is temperature responsive so as to close when the te...
06/19/1984
4453534Solar water heating system
A solar water heating system for heating water in a solar panel and storing it in a water storage tank includes a pump which circulates the water in the system, from the water storage tank through the solar panel and back to the water storage tank; a free...
06/12/1984
4428359Detachable insert for solar absorber
A detachable insert for solar absorbers with flow-through headers is disclosed which adapts such headers to vertical as well as horizontal mounting without fluid stagnation and with full drainability. The insert is insertable in the lowermost unused heade...
01/31/1984
4423599Solar energy utilization apparatus and method
A system is provided in which a metered amount of water is converted to steam in a solar collector which employs an elongated convex lens to concentrate solar radiation on an elongated flow tube. The stream is supplied to a concentric rotor turbine whose ...
01/03/1984
4381816Self-draining heat exchanger
A self-draining heat exchanger that is particularly adaptable in solar heat systems that drains automatically when the flow of liquid such as water is interrupted. The exchanger includes a plurality of tubes arranged for sequential flow of liquid therethr...
05/03/1983
4368724Automatic anti-freeze system for solar water heaters
A protection device for automatically draining the water contained in a solar energy water heater in case of frost is a frost detector disposed externally of the heater, and includes a heat exchanger formed of a material having a good heat conductivity, p...
01/18/1983
4349012Solar heating control
A solar heating control is adapted to be interconnected to a pre-existing auxiliary heating system connected to operate in response to a command signal issued by a pre-existing thermostat. The control operates in response to a first temperature sensed wit...
09/14/1982
4337757Solar heat collection and storage system
A closed solar energy collection and storage system comprising one or more solar heat collector units in parallel, feed and return headers at lower and upper levels at the opposite ends thereof, a liquid storage tank at a level below said units, a circula...
07/06/1982
4336792Solar heating freeze protection system
A solar energy system for heating water is disclosed. The system comprises a closed piping circuit in which water is pumped through a heat exchanger and storage tank which are not exposed to freezing temperatures up through a solar collector which may be ...
06/29/1982
4334521Solar energy system
Solar energy system incorporating a dirigible motor-driven collector and an electronic sensor for turning the collector to follow the sun. The collector is turned progressively during the day to occupy successive positions during predetermined time period...
06/15/1982
4326499Solar water heating system and heat exchanger therefor
In a solar water system including a solar collector prevention of damage to the collector during freezing conditions is achieved by providing a relatively small independent heat exchanger between the solar collector and the water heater and a vacuum break...
04/27/1982
4321908Prevention of freeze damage to liquid conduits
Freeze damage to pipes containing liquids is accomplished by including in the interior of the pipe an elongated section of tubing sealed at each end and containing internally an inert gas under pressure; a means for attaching one end of the tubing to the ...
03/30/1982
4319561Solar energy collector assembly
A solar energy collector assembly is provided which finds particular utility when interconnecting a plurality of tubular solar energy collectors with each other, in parallel, to form a bank of collectors, and when interconnecting a plurality of such banks...
03/16/1982
4312325Solar heating system
A solar heating system includes an array of solar collectors and a manifold through which the collectors are supplied with water, this water being derived from a storage tank located below the collectors. The water is circulated through the collectors by ...
01/26/1982
4309982Process and apparatus for the preparation of hot water from solar energy
A process for preventing freezing of solar collectors by automatic drainage of the water or liquid working fluid contained within the collectors the working fluid is drained from the collector, but remains within the closed solar collector circuit. Appara...
01/12/1982
4305379Solar energy fluid heating system
A closed solar water heating system automatically replaces, with air, the water which may be subjected to freezing when the system is in a nonoperative mode....
12/15/1981
4299202Integrated solar roof system and method of producing same
An integrated solar roof system, consisting of insulated roofing panels and collector panels, and method of producing same wherein the base assembly of the collector panel may be used with either an air or liquid absorber and is both an insulator and radi...
11/10/1981
4294309Method of controlling the heating of a chamber and a controlled chamber-heating installation
Circulation of a heat-conveying fluid between a solar energy collector (CS) and a water heater chamber (10) is stopped when the temperature tA of a sensor placed at the outlet of the collector is lower than a temperature tB +Dt, wher...
10/13/1981
4284062Solar collector system
A solar collector system wherein water is continuously circulated between collector units and a reservoir and the conduits between the reservoir and the collector units are free of valves and like restrictions for enabling full drainage of the system when...
08/18/1981
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