PRESSURE EQUALIZING INSERT

• US 20160124441A1
• Filed: 06/11/2014
• Published: 05/05/2016
• Est. Priority Date: 06/12/2013
• Status: Active Grant

• Current Assignee: Belimo Holding AG
• Original Assignee: Belimo Holding AG
• Inventors: KELLER, Urs, JUKES, Andrew James
• Granted Patent: US 9,964,963 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16K 5/0605 with particular plug arrangements, e.g. particular shape or built-in means
• CPC Class Codes: F24D 19/1015 using a valve or valves
• CPC Class Codes: G05D 16/028 Controlling a pressure difference control of flow G05D7/00
• CPC Class Codes: G05D 16/0608 the controller being mounted within the flow path and having slidable elements
• CPC Class Codes: G05D 7/0106 the sensing element being a flexible member, e.g. bellows, diaphragm, capsule
• CPC Class Codes: G05D 7/0133 within the flow-path
• CPC Class Codes: Y10T 137/7788 Pressures across fixed choke
• CPC Class Codes: Y10T 137/7791 Pressures across flow line valve

Abstract

The invention relates to a pressure equalising insert (1) which is provided for installation in a valve (10) for regulating a fluid stream in particular in a HVAC system. The pressure equalising insert (1) comprises a housing (2) having an actuating member (3) which is movably mounted thereon and is configured to at least partially guide the fluid stream regulated by the valve (10) and, when the pressure equalising insert (1) is installed, co-operates with a valve seat (15) depending upon a pressure difference prevailing in the fluid stream in order to regulate the fluid stream. The invention further relates to a valve (10) having an installed pressure equalising insert (1), wherein the pressure equalising insert (1) can be inserted in particular as a pre-assembled assembly into the valve (10).

Claims

1. A pressure equalizing insert (1), which is provided for installation in a valve (10) for regulating a fluid stream in particular in an HVAC system, wherein the pressure equalizing insert (1) comprises a housing (2) having an actuating member (3) displaceably mounted thereon and equipped to at least partially guide the fluid stream regulated by the valve (10), and, when the pressure equalizing insert (1) is installed, to cooperate with a valve seat (15) to regulate the fluid stream as a function of a pressure difference prevailing in the fluid stream.

2. The pressure equalizing insert (1) according to claim 1, characterized in that the actuating member (3) is arranged between an inlet opening (4) and an outlet opening (5) of the housing (2) so that the actuating member (3) is displaced relative to the valve seat (15) in accordance with a pressure difference between the pressure of a fluid stream guided in the pressure equalizing insert (1) and the pressure of a fluid stream guided outside of the pressure equalizing insert (1) for cooperation with the valve seat (15).

3. The pressure equalizing insert (1) according to claim 1, characterized in that the actuating member (3) is held displaceably by a membrane (6), wherein the membrane (6) divides a cavity of the housing (2) into an interior fluid region (P22) and a fluid region (P23, P21) assigned to the exterior, wherein the interior fluid region (P22) is fluidically connected to the fluid stream guided by the actuating member (3), wherein the fluid region (P23, P21) assigned to the exterior is fluidically connected to an exterior region of the housing (2), wherein the actuating member (3) is prestressed by a spring element (7) and the prevailing displacement of the actuating member (3) is the result of a pressure difference between a pressure in the interior fluid region (P22) and a pressure in the fluid region (P23, P21) assigned to the exterior.

4. The pressure equalizing insert (1) according to claim 1, characterized in that the housing (2) and the actuating member (3) are designed to be essentially cylindrical.

5. The pressure equalizing insert (1) according to claim 1, characterized in that the housing (2) has multiple housing parts, which can be connected to one another with one or more connecting devices.

6. The pressure equalizing insert (1) according to claim 1, characterized in that one or more limiting devices (29, 39) are arranged to limit the displacement of the actuating member (3) relative to the valve seat (15).

7. The pressure equalizing insert (1) according to claim 1, characterized in that a sealing element (133) is mounted on the inlet end between the housing (2) and the actuating member (3).

8. The pressure equalizing insert (1) according to claim 1, characterized in that a membrane (6) for holding the actuating member (3) has one or more corrugated embossings.

9. The pressure equalizing insert (1) according to claim 1, characterized in that the housing (2) has a first section (21), which is equipped for sealing with respect to a housing of the valve (10) when the pressure equalizing insert is installed, and the housing (2) has a third section (23), which is equipped to establish a fluid connection in the form of a clearance (S) between the housing (2) and the housing of the valve (10) when the pressure equalizing insert is installed, wherein the clearance (S) makes available a fluid connection to the fluid region (P23, P21) assigned to the exterior.

10. The pressure equalizing insert (1) according to claim 1, characterized in that the fluid region (P23) assigned to the exterior is fluidically connected to the exterior of the housing (2) via one or more openings (2d) in a wall of the housing (2).

11. The pressure equalizing insert (1) according to claim 1, characterized in that a section (21) of the housing (2) has on the inlet end a peripheral groove to receive a sealing element (134) which is equipped for sealing with respect to the housing of the valve (10) when the pressure equalizing insert is installed.

12. The pressure equalizing insert (1) according to claim 1, characterized in that a third section (23) of the housing (2) has on the outlet end an annular groove to receive a sealing insert (131) for a valve element (12) of the valve (10).

13. The pressure equalizing insert (1) according to claim 1, characterized in that the actuating member (3) has a lip-shaped region (32) whose dimensions cause the pressure of the flow-through rate through the valve (10) to be independent of the pressure (P1) at the inlet end.

14. A valve (10) for regulating a fluid stream of an HVAC system in particular having an installed pressure equalizing insert (1) according to claim 1, said pressure equalizing insert (1) being insertable into the valve (10) in particular as a preassembled module.

15. The valve (10) according to claim 14, characterized in that a clearance (S) is formed between the housing (2) of the pressure equalizing insert (1) and a housing of the valve (10), said clearance (S) being provided for establishing a fluid connection to the fluid region (P23, P21) assigned to the exterior of the pressure equalizing insert (1) and being designed so that the penetration of dirt into the pressure equalizing insert (1) is reduced and/or a hydraulic damping of the movement of the actuating member (3) of the pressure equalizing insert (1) is induced.

16. The valve (10) according to claim 1, characterized in that a first valve housing part (8) is equipped to accommodate a valve element (12) and the pressure equalizing insert (1), wherein a second valve housing part (9) is equipped for securing the pressure equalizing insert (1) in the first valve housing part (8), wherein the first and second valve housing parts (8, 9) are equipped so that an operative connection (11) can be established between the first and the second valve housing parts (8, 9).