US 11,287,167 B2Granted

Electronic expansion valve and assembly method therefor

AssigneeZhejiang Sanhua Climate and Appliance Controls Group Co., Ltd

InventorsSijie Tang, Guohua Xu

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Abstract

An electronic expansion valve and an assembly method therefor. The electronic expansion valve includes a screw rod component, a movable connection component, a valve pin component and an elastic element. One end of the elastic element abuts the movable connection component, and the other end thereof abuts the valve pin component. In the period from the valve pin component closing the valve port part to the screw rod component moving a pre-set displacement amount in the valve closing direction, the elastic element does not generate an elastic force pushing the valve pin component towards the valve port part; and in the period from the valve pin component closing the valve port part to in a case that the screw rod component moving more than the pre-set displacement amount in the valve closing direction, the elastic element generates an elastic force pushing the valve pin component towards the valve port part.

Claims25

Dependent claims

An electronic expansion valve, comprising:

a valve body component having a valve chamber;
a rotor component arranged in the valve chamber;
a screw rod component configured to be driven by the rotor component to move in an axial direction of the valve body component, wherein the screw rod component comprises a first support portion;
a movable connecting component comprising a second support portion and a first suspension portion;
a valve needle component configured to adjust an opening degree of the electronic expansion valve by moving away from or toward a valve port portion, wherein the valve needle component comprises a second suspension portion;
and
a spring arranged outside the movable connecting component, wherein one end of the spring is configured to abut against the movable connecting component, and another end of the spring is configured to abut against the valve needle component;
and
wherein the first support portion is configured to suspendingly support the first suspension portion, and the second support portion is configured to suspendingly support the second suspension portion;
a predetermined distance is provided between the screw rod component and the movable connecting component in the axial direction of the valve body component when the valve is fully opened, and the screw rod component is able to move with respect to the movable connecting component along said predetermined distance in the axial direction,
during a time period from when the valve needle component closes the valve port portion to when the screw rod component moves in a valve closing direction by the predetermined distance, no elastic force for pushing the valve needle component toward the valve port portion is generated by the spring;
and
in a case that a displacement amount of the screw rod component moving in the valve closing direction from a state that the valve needle component closes the valve port portion is greater than the predetermined distance, an elastic force for pushing the valve needle component toward the valve port portion is generated by the spring.

10 more elements

An assembly method for an electronic expansion valve, wherein the electronic expansion valve comprises:

a valve body component comprising an upper valve body and a lower valve body, wherein the valve body component is provided with a valve chamber;
a valve core sleeve at least partially arranged in the valve chamber;
a rotor component arranged in the valve chamber;
a screw rod component comprising a first support portion;
a nut component sleeved on a periphery of the screw rod component and threadedly connected to the screw rod component;
a valve needle component configured to adjust an opening degree of the electronic expansion valve by moving away from or toward a valve port portion, wherein the valve needle component comprises a second suspension portion;
and
an elastic member and a movable connecting component, wherein the movable connecting component comprises a first suspension portion and a second support portion;
and
the assembly method comprises the following steps:
S1, assembling the elastic member, the screw rod component, the movable connecting component and the valve needle component to form a first assembly, wherein in the first assembly, the screw rod component suspendingly supports the movable connecting component, the movable connecting component suspendingly supports the valve needle component, the elastic member is arranged outside the movable connecting component, one end of the elastic member abuts against the movable connecting component, and another end of the elastic member abuts against the valve needle component;
S2, fixedly connecting the lower valve body with the valve core sleeve to form a second assembly;
S3, extending a lower end of the first assembly into the valve core sleeve, sleeving the nut component on the periphery of the screw rod component to form a threaded connection between the nut component and the screw rod component, and then fixedly connecting the nut component with the lower valve body;
S4, fixedly connecting the screw rod component with the rotor component;
and
S5, fixedly connecting the upper valve body with the lower valve body.

13 more elements

An electronic expansion valve, comprising:

a valve body component having a valve chamber;
a rotor component arranged in the valve chamber;
a screw rod component configured to be driven by the rotor component to move in an axial direction of the valve body component, wherein the screw rod component comprises a first support portion;
a movable connecting component comprising a second support portion and a first suspension portion;
a valve needle component configured to adjust an opening degree of the electronic expansion valve by moving away from or toward a valve port portion, wherein the valve needle component comprises a second suspension portion;
and
an elastic member arranged outside the movable connecting component, wherein one end of the elastic member is configured to abut against the movable connecting component, and another end of the elastic member is configured to abut against the screw rod component;
and
wherein the first support portion is configured to suspendingly support the first suspension portion, and the second support portion is configured to suspendingly support the second suspension portion;
a predetermined distance is provided between the lead screw component and the movable connecting component in the axial direction of the valve body component when the valve is fully opened,
during a time period from when the valve needle component closes the valve port portion to when the screw rod component moves in a valve closing direction by the predetermined distance, no elastic force for pushing the valve needle component toward the valve port portion is generated by the elastic member;
and
in a case that a displacement amount of the screw rod component moving in the valve closing direction from a state that valve needle component closes the valve port portion is greater than the predetermined distance, an elastic force for pushing the valve needle component toward the valve port portion is generated by the elastic member.

10 more elements

An assembly method for an electronic expansion valve, wherein the electronic expansion valve comprises:

a valve body component comprising an upper valve body and a lower valve body, wherein the valve body is provided with a valve chamber;
a valve core sleeve at least partially arranged in the valve chamber;
a rotor component arranged in the valve chamber;
a screw rod component comprising a first support portion;
a nut component sleeved on a periphery of the screw rod component and threadedly connected to the screw rod component;
a valve needle component configured to adjust an opening degree of the electronic expansion valve by moving away from or toward a valve port portion, wherein the valve needle component comprises a second suspension portion;
and
an elastic member and a movable connecting component, wherein the movable connecting component comprises a first suspension portion and a second support portion;
and
the assembly method comprises the following steps:
S1, assembling the elastic member, the screw rod component, the movable connecting component and the valve needle component to form a first assembly, wherein in the first assembly, the screw rod component suspendingly supports the movable connecting component the movable connecting component suspendingly supports the valve needle component, the elastic member is arranged outside the movable connecting component, one end of the elastic member abuts against the movable connecting component, and another end of the elastic member abuts against the screw rod component;
S2, fixedly connecting the lower valve body with the valve core sleeve to form a second assembly;
S3, extending a lower end of the first assembly into the valve core sleeve, sleeving the nut component to the periphery of the screw rod component to form a threaded connection between the nut component and the screw rod component, and then fixedly connecting the nut component with the lower valve body;
S4, fixedly connecting the screw rod component with the rotor component;
and
S5, fixedly connecting the upper valve body with the lower valve body.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/478,118Filed 4 Jan 2018
Priority: CN 201710037808.018 Jan 2017
Published: US 2019/0368792 A15 Dec 2019
Granted: 29 Mar 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

F25B 41/35
With the valve member being actuated by electric means, e.g. by piezoelectric actuators: by rotary motors, e.g. by stepping motors
F16K 1/32
Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion…: details
F16K 1/50
Details: preventing rotation of valve members
F16K 31/50
Mechanical actuating means: with screw-spindle or internally threaded actuating means