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CN-121993931-A - Valve assembly

CN121993931ACN 121993931 ACN121993931 ACN 121993931ACN-121993931-A

Abstract

A valve assembly includes a valve block having an inlet, an outlet, a first cavity, a second cavity, and a first passage, wherein the second cavity is in communication with the inlet, the first cavity and the second cavity are capable of being in fluid communication through the first passage, a first valve spool movably disposed within the first cavity, a second valve spool movably disposed within the second cavity, and a first actuator for driving the first valve spool to move, wherein fluid entering through the inlet flows to the outlet via the second cavity when the first valve spool is in a first position closing the first passage and the second valve spool is in an open position.

Inventors

  • YAO ZE
  • WAN XUANCHEN
  • LI QING

Assignees

  • 法雷奥汽车空调湖北有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (11)

  1. 1. A valve assembly, comprising: A valve block (1) having an inlet (2), an outlet (22), a first cavity (24), a second cavity (15) and a first channel (13), wherein the second cavity (15) is in communication with the inlet (2), the first cavity (24) and the second cavity (15) being capable of fluid communication through the first channel (13); a first valve core (7) movably arranged in the first cavity (24); A second valve core (17) movably arranged in the second cavity (15), and A first actuator (11) for driving the first valve core (7) to move, Wherein when the first spool (7) is in a first position closing the first channel (13) and the second spool (17) is in an open position, fluid entering through the inlet (2) flows via the second cavity (15) to the outlet (22).
  2. 2. Valve assembly according to claim 1, wherein the second chamber (15) and the first chamber (24) are in fluid communication through the first channel (13) when the first valve element (7) is in a second position opening the first channel (13) and the second valve element (17) is in a closed position, such that fluid entering through the inlet (2) flows via the second chamber (15) and the first chamber (24) to the outlet (22).
  3. 3. Valve assembly according to claim 2, wherein the valve assembly is closed when the first spool (7) is in a third position and the second spool (17) is in a closed position.
  4. 4. A valve assembly according to any one of claims 1 to 3, wherein the valve assembly further comprises a second actuator for driving the second spool (17) to move.
  5. 5. A valve assembly according to claim 3, wherein the second spool (17) has a second piston (16), the second piston (16) dividing the second chamber (15) into a balancing chamber (37) and a flow-through chamber (38) communicating with the inlet (2), The valve block (1) also has a first balancing flow passage (12), through which the balancing chamber (37) and the first chamber (24) are in fluid communication when the first valve spool (7) is in the first position, so that the second piston (16) is in the open position.
  6. 6. Valve assembly according to claim 5, wherein the first spool (7) is a thermal expansion spool and the second spool (17) is a pilot cut-off spool.
  7. 7. Valve assembly according to claim 5, wherein a second balancing flow channel (20) is provided on the second piston (16), through which second balancing flow channel (20) the balancing chamber (37) and the flow-through chamber (38) are in fluid communication.
  8. 8. The valve assembly of claim 7, further comprising a first valve outlet passage (26) in fluid communication with the outlet (22).
  9. 9. The valve assembly of claim 8, wherein the first valve outlet passage (26) is in fluid communication with the balance chamber (37) through the first balance flow passage (12) when the first valve spool (7) is in the first position, and wherein the first valve outlet passage (26) is in fluid communication with the flow-through chamber (38) through the first passage (13) when the first valve spool (7) is in the second position.
  10. 10. Valve assembly according to claim 8, wherein the first actuator (11) abuts the first valve spool (7) against an inlet (23) of the first valve outlet channel (26) when the first valve spool (7) is in the third position.
  11. 11. Valve assembly according to claim 5, wherein the first valve spool (7) comprises a first piston (10), the first piston (10) having a hollow (29) communicating with the first cavity (24) and a through hole (25) communicating with the hollow (29), When the first valve core (7) is in the first position, the through hole (25) is aligned with the first balance runner (12); The through bore (25) is adjustably aligned with the first passage (13) when the first spool (7) is in the second position.

Description

Valve assembly Technical Field The present disclosure relates to a valve assembly. Background The thermal management system of the vehicle is mainly used for heating or cooling target objects such as a passenger cabin, a motor, a battery and the like of the vehicle, and is an important component of the vehicle. Thermal management systems typically include various valve elements to enable various thermal management modes. Valve elements such as pilot valves, expansion valves are commonly used in thermal management systems. Thermal expansion valves (TXVs) are widely used in thermal management systems for vehicles because of their cost advantages. When the thermostatic expansion valve is used, the superheat degree of the thermostatic expansion valve needs to be adjusted in advance so as to meet the requirement of system refrigerant flow adjustment. Along with the diversification of the thermal management demands of vehicles, the thermal expansion valve limits the application range due to the smaller flow regulation range. In general, the compression amount of the compression spring in the thermal expansion valve can be regulated through an actuator, so that the automatic regulation of the superheat degree of the thermal expansion valve is realized, and the flow regulation range of the thermal expansion valve can be further enlarged. However, the above solution does not allow fluid to pass through the valve element in an unthrottled state, i.e. does not allow a full opening function. Accordingly, there is a need in the art for a valve assembly that solves the above-described problems. Disclosure of Invention It is therefore an object of the present disclosure to provide a valve assembly that integrates two valves together, can achieve fully open, throttled and fully closed modes, and can also use one actuator to adjust both valves. The above object is achieved by a valve assembly as described below. The disclosure provides a valve assembly comprising a valve block having an inlet, an outlet, a first cavity, a second cavity, and a first passage, wherein the second cavity is in communication with the inlet, the first cavity and the second cavity are capable of being in fluid communication through the first passage, a first valve spool movably disposed within the first cavity, a second valve spool movably disposed within the second cavity, and a first actuator for driving the first valve spool to move, wherein fluid entering through the inlet flows to the outlet via the second cavity when the first valve spool is in a first position closing the first passage, and the second valve spool is in an open position. A valve assembly according to the present disclosure may also have one or more of the following features, alone or in combination. In an embodiment, when the first valve spool is in a second position that opens the first passage and the second valve spool is in a closed position, the second chamber and the first chamber are in fluid communication through the first passage such that fluid entering through the inlet port flows through the second chamber and the first chamber to the outlet port. In one embodiment, the valve assembly is closed when the first valve spool is in the third position and the second valve spool is in the closed position. In one embodiment, the valve assembly further comprises a second actuator for driving the second spool to move. In an embodiment, the second valve spool has a second piston dividing the second chamber into a balance chamber and a flow chamber in communication with the inlet, the valve block further having a first balance flow passage through which the balance chamber and the first chamber are in fluid communication when the first valve spool is in the first position such that the second piston is in the open position. In one embodiment, the first valve element is a thermal expansion valve element, and the second valve element is a pilot cut valve element. In one embodiment, a second balance flow channel is provided on the second piston, the balance chamber and the flow-through chamber being in fluid communication through the second balance flow channel. In one embodiment, the valve assembly further comprises a first valve outlet passage in fluid communication with the outlet. In one embodiment, the first valve outlet passage is in fluid communication with the balance chamber through the first balance flow passage when the first valve spool is in the first position, and the first valve outlet passage is in fluid communication with the flow chamber through the first passage when the first valve spool is in the second position. In one embodiment, the first actuator urges the first valve spool against an inlet of the first valve outlet passage when the first valve spool is in the third position. In one embodiment, the first valve spool includes a first piston having a hollow in communication with the first cavity and a through bore in communication with the hollow, the thro