Shape memory alloys

Patent metadata

Field	Value
Publication number	US-10072771-B2
Application number	US-201615133505-A
Country	US
Kind code	B2
Filing date	Apr 20, 2016
Priority date	Apr 23, 2015
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

This invention relates to valves ( 2 ) for heat exchanger thermostats ( 1 ), thermostat heads ( 3 ) for a heat exchanger thermostat ( 1 ) and a heat exchanger thermostat ( 1 ) comprising a valve ( 2 ) and a thermostat head ( 3 ). According to the invention, temperature sensitive means ( 10 ) are provided on or within said valve ( 2 ) and/or said thermostat head ( 3 ) influencing a throttling behavior of said valve ( 2 ) depending on a temperature of a fluid controlled by said valve ( 2 ). By this, a premature throttling of the fluid controlled by said valve ( 2 ) due to heat transfer between the fluid and the thermostat head ( 3 ) may be prevented. Thus, a good ambient temperature may be established which comes closer to the desired room temperature.

First claim

What is claimed is:

1. A valve for a heat exchanger thermostat, the valve comprising:
an inlet;
an outlet;
a valve seat between said inlet and said outlet;
a valve element cooperating with said valve seat and being actuable by a valve rod that is actuable by a temperature depending actuating means configured to provide an actuating force depending on an ambient temperature; and
a temperature sensitive means provided on or within said valve, the temperature sensitive means influencing a throttling behavior of said valve depending on a temperature of a fluid controlled by said valve;
wherein the temperature sensitive means are configured to provide a counterforce to the actuating force on the valve element depending on a temperature of the fluid; and
wherein the temperature sensitive means provide a first force at a first temperature and a second force at a second temperature, the first force being lower than the second force and the first temperature being lower than the second temperature.

2. The valve according to claim 1 , wherein the temperature sensitive means are configured to influence an effective length of the valve element depending on the temperature of the fluid.

3. The valve according to claim 1 , wherein the temperature sensitive means are arranged within the valve element.

4. The valve according to claim 1 , wherein the temperature sensitive means are interposed between the valve element and the valve rod.

5. The valve according to claim 1 , wherein the temperature sensitive means are arranged on the valve seat.

6. The valve according to claim 1 , wherein the temperature sensitive means are interposed between a resilient resetting means for the valve element and a resetting means seat.

7. The valve according to claim 1 , wherein the temperature sensitive means form a resilient resetting means for the valve element.

8. The valve according to claim 1 , wherein the temperature sensitive means comprise a shape memory alloy and/or a bi-metal.

9. The valve according to claim 1 , wherein the temperature sensitive means comprise a distancing disc and/or a coil spring.

10. The valve according to claim 1 , wherein the temperature sensitive means provide a first force in a first temperature range and a second force different from the first force in a second temperature range, a transition from the first force to the second force occurring at a temperature of the fluid of between 40° C. and 90° C.

11. A thermostat head for a heat exchanger thermostat, the thermostat head comprising:
a temperature depending actuating means for actuating a valve element with an actuating force depending on an ambient temperature of the thermostat head; and
a temperature sensitive means provided on or within said thermostat head, the temperature sensitive means influencing a throttling behavior of said valve depending on a temperature of a fluid being controlled by said valve;
wherein the temperature sensitive means are configured to provide a counterforce to the actuating force on the valve element depending on a temperature of the fluid; and
wherein the temperature sensitive means provide a first force at a first temperature and a second force at a second temperature, the first force being lower than the second force and the first temperature being lower than the second temperature.

12. A heat exchanger thermostat comprising a valve and a thermostat head, the valve comprising:
an inlet;
an outlet;
a valve seat between said inlet and said outlet;
a valve element cooperating with said valve seat and being actuable by a valve rod with an actuating force; and
the thermostat head comprising temperature depending actuating means for actuating a valve depending on an ambient temperature of the thermostat head; and
temperature sensitive means provided on or within said valve and/or said thermostat head, the temperature sensitive means influencing a throttling behavior of said valve depending on a temperature of a fluid controlled by said valve;
wherein the temperature sensitive means are configured to provide a counterforce to the actuating force on the valve element depending on a temperature of the fluid; and
wherein the temperature sensitive means provide a first force at a first temperature and a second force at a second temperature, the first force being lower than the second force and the first temperature being lower than the second temperature.

13. The heat exchanger thermostat according to claim 12 , wherein the valve and the thermostat head form an integrated unit.

14. The valve according to claim 2 , wherein the temperature sensitive means are arranged within the valve element.

15. The valve according to claim 2 , wherein the temperature sensitive means are interposed between the valve element and the valve rod.

16. The valve according to claim 3 , wherein the temperature sensitive means are interposed between the valve element and the valve rod.

17. The valve according to claim 2 , wherein the temperature sensitive means are arranged on the valve seat.

18. The valve according to claim 3 , wherein the temperature sensitive means are arranged on the valve seat.

19. The valve according to claim 1 , wherein the temperature dependent actuating means is configured to provide the actuating force depending on the temperature of the fluid.

20. A valve for a heat exchanger thermostat, the valve comprising:
an inlet;
an outlet;
a valve seat between said inlet and said outlet;
a valve element cooperating with said valve seat and being actuable by a valve rod that is actuable by a temperature depending actuating means configured to provide an actuating force depending on an ambient temperature; and
a temperature sensitive means provided on or within said valve, the temperature sensitive means influencing a throttling behavior of said valve depending on a temperature of a fluid controlled by said valve;
wherein the temperature sensitive means are configured to provide a counterforce to the actuating force on the valve element depending on a temperature of the fluid;
wherein the temperature sensitive means are arranged on the valve seat.

21. A valve for a heat exchanger thermostat, the valve comprising:
an inlet;
an outlet;
a valve seat between said inlet and said outlet;
a valve element cooperating with said valve seat and being actuable by a valve rod that is actuable by a temperature depending actuating means configured to provide an actuating force depending on an ambient temperature; and
a temperature sensitive means provided on or within said valve, the temperature sensitive means influencing a throttling behavior of said valve depending on a temperature of a fluid controlled by said valve;
wherein the temperature sensitive means are configured to provide a counterforce to the actuating force on the valve element depending on a temperature of the fluid; and
wherein the temperature sensitive means provide a first force in a first temperature range and a second force different from the first force in a second temperature range, a transition from the first force to the second force occurring at a temperature of the fluid of between 40° C. and 90° C.

22. A valve for a heat exchanger thermostat, the valve comprising:
an inlet;
an outlet;
a valve seat between said inlet and said outlet;
a valve element cooperating with said valve seat and being actuable by a valve rod that is actuable by a temperature depending actuating means configured to provide an actua

Assignees

• Danfoss As

Inventors

• Holing Niels Gregersen
• Frederiksen Bjarne
• Markvart Arne
• Sigurdsson Haraldur
• Balzarini Gaia

Classifications

• F03G7/06145

  Springs · CPC title

• G05D23/08

  with bimetallic element · CPC title

• G05D23/025

  the sensing element being placed within a regulating fluid flow · CPC title

• F03G7/065

  using a shape memory element · CPC title

• Y10T137/7737

  Thermal responsive · CPC title