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CN-121993932-A - Valve assembly

CN121993932ACN 121993932 ACN121993932 ACN 121993932ACN-121993932-A

Abstract

A valve assembly includes a valve block having an inlet, an outlet, a first cavity and a second cavity disposed thereon, a first valve spool movably disposed within the first cavity, and a second valve spool movably disposed within the second cavity, the second valve spool having a second piston dividing the second cavity into a balance cavity and a flow-through cavity in communication with the inlet, the valve block further having a first balance flow channel and a first passage, the first valve spool having at least a first position opening the first balance flow channel and a second position opening the first passage, the balance cavity and the first cavity being in fluid communication through the first balance flow channel when the first valve spool is in the first position such that the second piston is in the open position, fluid entering through the inlet flows to the outlet via the flow-through cavity, and the flow-through cavity and the first cavity being in fluid communication through the first passage such that fluid entering through the inlet flows to the outlet via the flow-through cavity and the first cavity when the first valve spool is in the second position.

Inventors

  • YAO ZE
  • Xue Gaoqiang
  • ZHONG ANQI

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: The valve block (1) is provided with an inlet (2), an outlet (22), a first cavity (24) and a second cavity (15); A first valve core (7) movably arranged in the first cavity (24), and A second spool (17) movably disposed within the second chamber (15); Wherein the second valve core (17) is provided with a second piston (16), the second piston (16) divides the second cavity (15) into a balance cavity (37) and a circulation cavity (38) communicated with the inlet (2), The valve block (1) also has a first balancing flow passage (12) and a first channel (13), The first valve element (7) has at least a first position for opening the first balancing flow passage (12) and a second position for opening the first passage (13), and Wherein when the first spool (7) is in the first position, the balance chamber (37) and the first chamber (24) are in fluid communication through the first balance flow channel (12) such that the second piston (16) is in an open position, fluid entering through the inlet (2) flows through the flow chamber (38) to the outlet (22); when the first valve element (7) is in the second position, the flow-through chamber (38) and the first chamber (24) are in fluid communication through the first passage (13) such that the second piston (16) is in a closed position, and fluid entering through the inlet (2) flows to the outlet (22) via the flow-through chamber (38) and the first chamber (24).
  2. 2. The valve assembly of claim 1, wherein the first cavity (24) has a first valve port (40) in fluid communication with the outlet (22), and The first spool (7) includes: a first piston (10); A first elastic member (9) having a first end (101) provided to the first piston (10) and a second end (102) opposite to the first end (101), and A valve ball assembly (28) disposed on the second end (102) of the first resilient member (9) and movable between a valve port open position for opening the first valve port (40) and a valve port closed position for closing the first valve port (40).
  3. 3. The valve assembly of claim 2, wherein the first piston (10) is configured to move in a first direction between the first position, the second position, and a third position closing the valve assembly, wherein, When the first piston (10) is in the first position and the second position, the valve ball assembly (28) is in a valve port open position; when the first piston (10) is in the third position, the valve ball assembly (28) is in a valve port closed position.
  4. 4. A valve assembly according to claim 3, wherein the first piston (10) has a hollow portion (29) communicating with the first chamber (24) and a through hole (25) communicating with the hollow portion (29), Wherein the through hole (25) is at least partially aligned with the first balancing flow passage (12) when the first piston (10) is in the first position; The through hole (25) is at least partially aligned with the first channel (13) when the first piston (10) is in the second position.
  5. 5. The valve assembly of claim 4, wherein the second chamber (15) has a second valve port (14) in fluid communication with the outlet (22), The second valve core (17) is further provided with a second elastic piece (19), and the second elastic piece (19) is arranged on the second piston (16) and elastically biases the second piston (16) to abut against the second valve port (14).
  6. 6. Valve assembly according to claim 5, wherein a second balancing flow channel (20) is provided on the second piston (16), the second balancing flow channel (20) being in fluid communication with the balancing chamber (37) and the flow-through chamber (38).
  7. 7. The valve assembly according to claim 6, wherein when the first piston (10) is in the first position, the pressure in the balancing chamber (37) is less than the pressure in the flow-through chamber (38), the second piston (16) moves against the elastic biasing force of the second elastic member (19) to open the second valve port (14) such that the second valve spool (17) is in an open position.
  8. 8. The valve assembly according to claim 7, wherein when the first piston (10) is in the second and third positions, the pressure in the balancing chamber (37) is equal to the pressure in the flow chamber (38), the second piston (16) abutting the second valve port (14) such that the second spool (17) is in a closed position.
  9. 9. Valve assembly according to claim 8, wherein the through hole (25) is adjustably aligned with the first channel (13) when the first piston (10) is in the second position.
  10. 10. Valve assembly according to claim 9, wherein the valve assembly further comprises a temperature sensing device (6), the temperature sensing device (6) comprising an adjustment lever (4), the adjustment lever (4) being arranged on the other side of the valve ball assembly (28) with respect to the first elastic member (9) and being movable in the first direction.
  11. 11. A valve assembly according to claim 3, wherein the valve assembly further comprises a first actuator (11) for driving the first piston (10) in movement.

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