CN214578881U - Lifting type electronic expansion valve with large-caliber on-off function - Google Patents
Lifting type electronic expansion valve with large-caliber on-off function Download PDFInfo
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- CN214578881U CN214578881U CN202120643726.2U CN202120643726U CN214578881U CN 214578881 U CN214578881 U CN 214578881U CN 202120643726 U CN202120643726 U CN 202120643726U CN 214578881 U CN214578881 U CN 214578881U
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Abstract
The utility model discloses a lift-draw formula has electronic expansion valve of heavy-calibre break-make function. The valve comprises a valve body, a valve rod is arranged in the valve body and is driven by a driving device to move up and down, and the valve also comprises a connecting sleeve which is movably connected with the valve rod; a valve core component is also arranged in the valve body, a first valve port is arranged between the valve rod and the valve core component, and a second valve port is arranged between the valve core component and the valve body; the lower end of the connecting sleeve is connected with the valve core component. The electronic expansion valve is designed with two valve ports, wherein one valve port with small flow is used for the refrigeration working condition of the air conditioning system, and the other valve port with large flow is used for directly introducing the refrigerant into the evaporator without throttling when the system is in the heating working condition, so that the parallel pipelines and the switch valves of the air conditioning system are reduced, the cost of the air conditioning system is reduced, and the leakage at the joint of the pipelines is reduced.
Description
Technical Field
The utility model relates to a lift-draw formula has electronic expansion valve of heavy-calibre break-make function belongs to vehicle air conditioning system technical field.
Background
An electronic expansion valve is a throttling element that can be programmed to control the flow of refrigerant into a refrigeration unit. In some occasions (such as a new energy automobile heat pump system) with severe load change or wide operation condition range, the traditional throttling elements (such as a capillary tube, a thermostatic expansion valve and the like) can not meet the requirements of comfort and energy conservation, the electronic expansion valve is combined with the variable capacity technology of a compressor to be more and more widely applied, the electronic expansion valve is adopted to adjust the heat degree of a refrigerant at the outlet of an evaporator, a temperature sensor and a pressure sensor (sometimes, the temperature sensor arranged in the middle of the evaporator is also used for collecting the evaporation temperature) arranged at the outlet of the evaporator are used for collecting a superheat degree signal, and the opening degree of the expansion valve is controlled by feedback adjustment; and feedforward and feedback composite regulation can be adopted, superheat degree control lag caused by heat capacity of the evaporator pipe wall and the sensor is eliminated, system regulation quality is improved, and superheat degree is controlled within a target range in a wide evaporation temperature area. Besides the control of the superheat degree of the refrigerant at the outlet of the evaporator, the control function of the electronic expansion valve can be expanded through a specified adjusting program, and the electronic expansion valve is used for defrosting of a heat pump unit, controlling the exhaust temperature of a compressor, cooling a battery of an electric automobile and the like.
The existing electronic expansion valves for automobile air conditioning systems generally include:
(1) direct-acting type: the expansion valve is a needle valve directly driven by a pulse stepping motor. When the pulse voltage of the control circuit is applied to each phase coil of the motor stator according to a certain logic relationship, the motor rotor made of permanent magnets generates rotary motion under the action of magnetic torque, and the needle valve is lifted or lowered through the transmission of threads to adjust the flow of the valve (see figure 2).
(2) The speed reduction type: the expansion valve is internally provided with a reduction gear set. The stepping motor transmits the magnetic torque to the needle valve through the reduction gear. The reduction gear set amplifies the effect of the magnetic torque.
However, both the direct-acting and the deceleration type electronic expansion valves have only one small-flow control valve port to realize the function of a single refrigeration state.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a lift-draw formula has electronic expansion valve of heavy-calibre break-make function can realize the function of two kinds of operating modes of system's refrigeration and heating.
The utility model discloses a realize through following technical scheme:
a lifting type electronic expansion valve with a large-caliber on-off function comprises a valve body, wherein a valve rod is arranged in the valve body and is driven by a driving device to move up and down, and the lifting type electronic expansion valve also comprises a connecting sleeve, wherein the connecting sleeve is movably connected with the valve rod; a valve core component is also arranged in the valve body, a first valve port is arranged between the valve rod and the valve core component, and a second valve port is arranged between the valve core component and the valve body; the lower end of the connecting sleeve is connected with the valve core component.
The lifting electronic expansion valve with the large-caliber on-off function is characterized in that the driving device is a stepping motor, and a Hall sensing chip for controlling the angular displacement of a rotor is contained in the stepping motor.
The lifting type electronic expansion valve with the large-caliber on-off function is characterized in that the valve core component comprises a sealing element, the sealing element and the valve body form the second valve port, and the drift diameter of the second valve port is consistent with that of the inlet pipeline.
The lifting electronic expansion valve with the large-caliber on-off function has the advantages that the flow of the second valve port is larger than that of the first valve port.
The lifting type electronic expansion valve with the large-caliber on-off function is characterized in that the valve rod is provided with an annular groove, and the connecting sleeve is movably connected with the valve rod through the annular groove.
The lifting type electronic expansion valve with the large-caliber on-off function is characterized in that the connecting sleeve is movably connected with the valve rod through a clamp spring.
The utility model discloses the beneficial effect who reaches:
(1) the electronic expansion valve is designed with two valve ports, wherein one valve port with small flow is used for the refrigeration working condition of the air conditioning system, and the other valve port with large flow is used for directly introducing the refrigerant into the evaporator without throttling when the system is in the heating working condition, so that the parallel pipelines and the switch valves of the air conditioning system are reduced, the cost of the air conditioning system is reduced, and the leakage at the joint of the pipelines is reduced.
(2) The control system can realize the operation of two working conditions only by directly controlling the pulse signal for driving the motor of the electronic expansion valve according to different refrigeration and heating conditions, does not need other control signals and an electrified circuit, and is simple and reliable in system control.
(3) The utility model discloses an opening of two valve ports is carried the valve rod by step motor substep and is realized, does not receive the influence of expansion valve exit pressure.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a conventional direct-acting electronic expansion valve.
In the figure: 1. the valve comprises a driving device, 2, a valve rod, 3, a connecting sleeve, 4, a valve core component, 5 and a valve body.
Detailed Description
The technical scheme of the utility model is further explained in the following with the attached drawings. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial" and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction to be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in the figure, the utility model discloses a lift-draw formula has electronic expansion valve of heavy-calibre break-make function, its structure includes: the valve comprises a stepping motor part 1, a valve rod 2, a connecting sleeve 3, a valve core part 4 and a valve body 5; the stepping motor 1 comprises a Hall sensing chip for controlling the angular displacement of a rotor, a valve rod 2 connected with the rotor of the stepping motor, and a connecting sleeve 3 embedded on an annular groove of the valve rod 2, wherein a valve core part 4 comprises a sealing element and forms a large-flow second valve port B with a valve body 5, and the path of the second valve port B is close to that of an inlet pipeline; a first valve port A with small flow is arranged between the valve rod 2 and the valve core component 4, and the drift diameter of the first valve port A meets the drift diameter requirement of a related expansion valve;
when the air conditioning system does not work, the valve rod 2 of the electronic expansion valve is positioned at the lower limit of the stroke of the motor 1, the valve rod 2 is contacted with the upper end of the first valve port A, and the first valve port A and the second valve port B are completely closed.
When the air conditioning system needs normal refrigeration work, the stepping motor 1 of the electronic expansion valve drives the valve rod 2 to move upwards, a distance exists between the lower end face of the connecting sleeve 3 and the step face of the annular groove of the valve rod 2, the connecting sleeve 3 cannot be driven to move upwards when the valve rod 2 moves upwards, the valve rod 2 gradually opens the first valve port A, the first valve port A has throttling effect due to the small diameter of the first valve port A, the pressure of the upper end face of the valve core component 4 is larger than that of the lower end face of the valve core, the valve core component 4 cannot move upwards, the second valve port B is in a closed state, the electronic expansion valve is in a small-flow throttling working state, and the stepping motor 1 drives the valve rod 2 to move upwards and downwards within a certain range to control the opening area of the first valve port A so as to control the flow of refrigerant entering the evaporator;
when the air conditioning system is converted into a heating state, the electronic expansion valve drives the valve rod 2 to move upwards in a large stroke through the rotation of the stepping motor 1, at the moment, the lower end of the valve rod 2 is separated from the first valve port A of the valve core component 4, the flow of the first valve port A is increased, so that the pressure difference between the upper end surface of the valve core component 4 and the lower end surface of the valve core component 4 is reduced, meanwhile, the step of the annular groove of the valve rod 2 is contacted with the lower end surface of the connecting sleeve 3, the valve rod 2 drives the connecting sleeve 3 to lift the valve core component 4, at the moment, the large-flow second valve port B is opened, the electronic expansion valve is in a straight-through state, and refrigerant directly enters the evaporator without throttling.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (6)
1. A lifting type electronic expansion valve with a large-caliber on-off function comprises a valve body, wherein a valve rod is arranged in the valve body and is driven by a driving device to move up and down; a valve core component is also arranged in the valve body, a first valve port is arranged between the valve rod and the valve core component, and a second valve port is arranged between the valve core component and the valve body; the lower end of the connecting sleeve is connected with the valve core component.
2. The pull-up type electronic expansion valve with large-caliber on-off function as claimed in claim 1, wherein the driving device is a stepping motor, and the stepping motor comprises a hall sensor chip for controlling the angular displacement of the rotor.
3. The poppet-type electronic expansion valve with large-diameter on-off function as claimed in claim 2, wherein the valve element member comprises a sealing element, the sealing element and the valve body form the second valve port, and the diameter of the second valve port is the same as that of the inlet pipeline.
4. The poppet-type electronic expansion valve with large-diameter on-off function as claimed in claim 3, wherein the flow rate of the second port is greater than that of the first port.
5. The pull-up type electronic expansion valve with large-caliber on-off function as claimed in claim 1, wherein the valve rod is provided with an annular groove, and the connecting sleeve is movably connected with the valve rod through the annular groove.
6. The pull-up type electronic expansion valve with large-caliber on-off function as claimed in claim 1 or 5, wherein the connecting sleeve is movably connected with the valve rod by a snap spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120643726.2U CN214578881U (en) | 2021-03-30 | 2021-03-30 | Lifting type electronic expansion valve with large-caliber on-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120643726.2U CN214578881U (en) | 2021-03-30 | 2021-03-30 | Lifting type electronic expansion valve with large-caliber on-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214578881U true CN214578881U (en) | 2021-11-02 |
Family
ID=78356471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120643726.2U Active CN214578881U (en) | 2021-03-30 | 2021-03-30 | Lifting type electronic expansion valve with large-caliber on-off function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214578881U (en) |
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2021
- 2021-03-30 CN CN202120643726.2U patent/CN214578881U/en active Active
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