CN219102059U - Air conditioning equipment and electronic expansion valve - Google Patents

Abstract

The application relates to air conditioning equipment and an electronic expansion valve, and particularly relates to a refrigeration system, wherein the refrigeration system comprises the electronic expansion valve, the electronic expansion valve is provided with a refrigerant throttling channel, the refrigerant throttling channel is provided with a throttling orifice, and the opening area of the throttling orifice is configured to be capable of being increased or decreased along with the running mode of an air conditioner. The opening of the throttle orifice can be controlled to be increased when a large flow of refrigerant is needed, and the opening of the throttle orifice can be controlled to be reduced when a small flow of refrigerant is needed, so that the caliber of the electronic expansion valve can be automatically adjusted in different operation modes according to the needs, and the optimal energy efficiency of air conditioning equipment is ensured. And the electronic expansion valve is a single part, and a plurality of sets of systems are not required to be arranged for controlling the air conditioner in different modes, so that the refrigeration system has a simple structure and low cost.

Description

Air conditioning equipment and electronic expansion valve

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner and an electronic expansion valve.

Background

The multifunctional heat pump water machine is a machine set capable of heating and producing hot water in a heating mode and refrigerating and producing cold water in a refrigerating mode, so as to provide various water outlet temperatures and air outlet temperatures, and meet the multifunctional requirements of customers on the air conditioner.

The electronic expansion valve of the existing heat pump water machine has two design modes, the first is designed according to a heating mode, the second adopts a double-electronic expansion valve design, and the heating mode and the refrigerating mode are respectively matched with the electronic expansion valve to operate, so that the performance and the energy efficiency of the air conditioner reach the optimal level in the heating mode and the refrigerating mode.

However, the first design method ignores the refrigerating performance and energy efficiency, resulting in low refrigerating performance and energy efficiency of the heat pump water machine, and the second design method improves the refrigerating performance and energy efficiency, but increases the complexity of the refrigerating system of the air conditioner and increases the cost.

Disclosure of Invention

Based on this, it is necessary to provide an air conditioner and an electronic expansion valve capable of ensuring the cooling performance, ensuring the heating performance, reducing the complexity of a cooling system and reducing the cost of an air conditioner, aiming at the problem that the water machine of the multifunctional equipment cannot simultaneously give consideration to the cooling performance and the heating performance without increasing the cost.

The application provides an air conditioning apparatus, comprising:

the refrigeration system comprises an electronic expansion valve, wherein the electronic expansion valve is provided with a refrigerant throttling channel, and the refrigerant throttling channel is provided with a throttling port;

wherein the opening area of the choke is configured to be capable of increasing or decreasing according to the operation mode of the air conditioning apparatus.

In one embodiment, the air conditioning apparatus has a cooling mode in which the electronic expansion valve is controlled to increase the opening area of the orifice.

In one embodiment, the air conditioning apparatus has a heating mode in which the electronic expansion valve is controlled to reduce the opening area of the orifice.

In one embodiment, the electronic expansion valve includes a housing and a movable member, the housing has the refrigerant throttling channel therein, and the movable member is movably disposed in the refrigerant throttling channel and forms the throttling port therein;

the movable piece is controlled to move relative to the shell so as to increase or decrease the opening area of the throttling opening.

In one embodiment, the housing includes an inlet tube and an outlet tube, both in communication with the refrigerant throttling passage, and the throttling orifice is in communication between the inlet tube and the outlet tube.

In one embodiment, the movable piece comprises a plurality of movable pieces, one end of each movable piece is connected with the shell, and the other end of each movable piece is surrounded to form the throttling port;

wherein at least one movable piece moves relative to the shell to reduce or increase the opening area of the throttle orifice.

In one embodiment, all the movable pieces are arranged in a superimposed manner along the circumference, and all the movable pieces rotate relative to the shell to reduce or increase the opening area of the throttling opening.

In one embodiment, the air conditioning apparatus includes a first control assembly for controlling rotation of all the movable pieces to increase or decrease an opening area of the choke.

In one embodiment, the first control assembly comprises a control part and an operation part, and the operation part is in driving connection with all the movable sheets;

the control piece is used for controlling the operation piece to drive all the movable pieces to synchronously rotate relative to the shell.

In one embodiment, the electronic expansion valve further comprises a valve needle, the head of the valve needle being capable of extending into the orifice;

and the head of the valve needle is configured to be movable in an axial direction of the orifice to adjust an opening degree of the electronic expansion valve.

In one embodiment, the air conditioning apparatus further comprises a second control assembly for controlling the reciprocating movement of the valve needle in the axial direction of the orifice.

According to another aspect of the application, there is further provided an electronic expansion valve, including a housing and a movable member, wherein the housing has a refrigerant throttling channel therein, and the movable member is movably disposed in the refrigerant throttling channel and encloses a throttling port;

the movable piece is controlled to move relative to the shell and increase or decrease the area of the throttling opening.

In one embodiment, the movable piece comprises a plurality of movable pieces, one end of each movable piece is connected with the shell, and the other end of each movable piece is surrounded to form the throttling port;

wherein at least one movable piece moves relative to the shell to reduce or increase the opening area of the throttle orifice.

In one embodiment, all the movable pieces are arranged in a superimposed manner along the circumference, and all the movable pieces rotate relative to the shell to reduce or increase the opening area of the throttling opening.

In one embodiment, the electronic expansion valve further comprises a valve needle, the head of the valve needle being capable of extending into the orifice;

and the head of the valve needle is configured to be movable in an axial direction of the orifice to adjust an opening degree of the electronic expansion valve.

Above-mentioned air conditioning equipment, including refrigerating system, refrigerating system has electronic expansion valve, and the choke of the refrigerant throttle passageway of electronic expansion valve can take place to increase or reduce according to air conditioning equipment's operational mode, can control the choke increase when needs the refrigerant of large-traffic, can control the choke when needs the refrigerant of low-traffic and reduce to realize that the bore of electronic expansion valve can be according to the demand automatically regulated under different operational modes, with the energy efficiency of guaranteeing air conditioning equipment is best, and electronic expansion valve is single part, makes refrigerating system's simple structure, with low costs.

Drawings

FIG. 1 is a schematic diagram showing the structure of an electronic expansion valve according to an embodiment of the present application;

fig. 2 is a schematic view showing a first angular cross-sectional structure of the electronic expansion valve provided in fig. 1 in a heating mode;

fig. 3 is a schematic view showing a second angular sectional structure of the electronic expansion valve provided in fig. 1 in a heating mode;

fig. 4 is a schematic view showing a partial structure of the electronic expansion valve provided in fig. 1 in a heating mode;

FIG. 5 is a schematic view showing a first angular cross-sectional structure of the electronic expansion valve provided in FIG. 1 in a cooling mode;

FIG. 6 is a schematic view showing a second angular cross-sectional structure of the electronic expansion valve provided in FIG. 1 in a cooling mode;

FIG. 7 is a schematic view showing a partial structure of the electronic expansion valve provided in FIG. 1 in a cooling mode;

FIG. 8 illustrates a partial schematic construction of the electronic expansion valve provided in FIG. 1;

fig. 9 is a graph of electronic expansion valve flow versus electronic expansion valve opening provided in fig. 1.

Reference numerals:

100. an electronic expansion valve; 10. a housing; 11. an inlet pipe; 12. an outlet tube; 13. a refrigerant throttle passage; 20. a movable member; 21. a choke; 22. a movable plate; 30. a first control assembly; 31. a control member; 32. an operating member; 321. a rotary gear; 322. a rack; 40. a valve needle; 50. and a second control assembly.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The accompanying drawings are not 1:1, and the relative dimensions of the various elements are drawn by way of example only in the drawings and are not necessarily drawn to true scale.

The refrigerating system of the multifunctional heat pump water machine with the refrigerating and heating functions generally comprises a compressor, a condenser, an evaporator, a throttle valve and a four-way reversing valve. When the refrigerating system is used for refrigerating, the compressor sucks working medium steam with lower pressure from the evaporator, the working medium steam is sent into the condenser after the pressure of the working medium steam is increased, the working medium steam is condensed into liquid with higher pressure in the condenser, the liquid is sent into the evaporator after being throttled by the throttle valve, the liquid is absorbed by heat and evaporated in the evaporator to become steam with lower pressure, and then the steam is sent into an inlet of the compressor, so that the refrigerating cycle is completed. When the refrigerating system heats, the four-way valve commutates, and the evaporator acts as a condenser, and the condenser acts as an evaporator.

There are two design modes of the electronic expansion valve in the existing multifunctional heat pump water machine, the first is the design according to the heating mode, and the setting mode can achieve better performance and energy efficiency in the heating mode, but ignores the performance and energy efficiency in the cooling mode, so that the refrigerating performance and energy efficiency of the heat pump water machine are not high.

The second is to use the design of double electronic expansion valves, and the heating mode and the refrigerating mode are respectively matched with the electronic expansion valves to operate, so that the performance and the energy efficiency of the air conditioner reach the optimal level in the heating mode and the refrigerating mode. However, this arrangement, while improving refrigeration performance and energy efficiency, increases the complexity and cost of the refrigeration system of the air conditioner.

In order to solve the above problems, referring to fig. 1 to 3, the present application provides an air conditioning apparatus including a refrigeration system, and it will be understood that the refrigeration system of the present application may perform refrigeration or heating.

The refrigeration system comprises an electronic expansion valve 100, wherein the electronic expansion valve 100 is provided with a refrigerant throttling channel 13, the refrigerant throttling channel 13 is provided with a throttling port 21, and the opening area of the throttling port 21 is configured to be capable of being increased or decreased along with the running mode of the air conditioner.

Specifically, when a large flow of refrigerant is needed, the opening of the throttle orifice 21 can be controlled to be increased, and when a small flow of refrigerant is needed, the opening of the throttle orifice 21 can be controlled to be reduced, so that the caliber of the electronic expansion valve 100 can be automatically adjusted in different operation modes according to the needs, and the optimal energy efficiency of the air conditioning equipment is ensured. In addition, the electronic expansion valve 100 is a single part, and a plurality of systems are not required to be arranged to control the air conditioner in different modes, so that the refrigeration system is simple in structure and low in cost.

In one embodiment, referring to fig. 2 to 4, the air conditioning apparatus has a heating mode, and the circulation flow of the refrigerant of the system required during heating is small, so that in the heating mode, the electronic expansion valve 100 is controlled to reduce the opening area of the throttle opening 21 of the refrigerant throttle channel 13, so as to achieve the aperture required for heating, thereby ensuring more refrigerant to be throttled, and improving the heating efficiency.

Further, referring to fig. 5 to 7, the air conditioning apparatus has a refrigeration mode, and the system refrigerant circulation flow required during refrigeration is large, so that in the refrigeration mode, the electronic expansion valve 100 is controlled to increase the opening area of the throttle orifice 21 of the refrigerant throttle channel 13, so as to reach the caliber required for refrigeration, thereby ensuring more refrigerant to pass through and improving the refrigeration energy efficiency.

Specifically, the operation temperature, the air outlet temperature and the water outlet temperature in the cooling mode are customized according to the unit design, and the operation temperature, the air outlet temperature and the water outlet temperature in the heating mode are also customized according to the unit design, and it can be understood that the controller 31 can be configured, and the operation mode of the air conditioning apparatus is determined by selecting the cooling or heating function by the operator, so as to intelligently control the electronic expansion valve 100 to adjust the opening area of the self throttle 21.

In one embodiment, the electronic expansion valve 100 includes a housing 10 and a movable member 20, wherein the housing 10 has a refrigerant throttling channel 13, the movable member 20 is movably disposed in the refrigerant throttling channel 13 and forms a throttling opening 21 therein, and the movable member 20 is controlled to move relative to the housing 10 and increase or decrease an opening area of the throttling opening 21.

The size of the opening area of the choke 21 is the caliber of the choke 21, and the movable piece 20 is arranged to move in the shell 10, so that the caliber of the choke 21 is increased or reduced. When the electronic expansion valve 100 is fully opened, the maximum flow area of the orifice 21 of the refrigerant throttle channel 13 is equal to the opening area of the orifice 21.

Specifically, the housing 10 includes an inlet pipe 11 and an outlet pipe 12, both the inlet pipe 11 and the outlet pipe 12 are communicated with the refrigerant throttle passage 13, and the throttle 21 is communicated between the inlet pipe 11 and the outlet pipe 12. The refrigerant flowing from the upstream side enters the refrigerant throttle passage 13 from the inlet pipe 11, passes through the throttle port 21, and flows out from the outlet pipe 12. Thereby realizing the throttling effect.

In one embodiment, the movable member 20 includes a plurality of movable plates 22, and one end of each movable plate 22 is connected to the housing 10, and the other end is surrounded to form a choke 21. Wherein at least one movable plate 22 moves relative to the housing 10 to reduce or increase the opening area of the orifice 21.

Specifically, the two ends of each movable piece 22 form a first connection end and a second connection end, the first connection end of each movable piece 22 is connected with the housing 10, and the second connection end of each movable piece 22 is surrounded to form a choke 21. When the position of any one of the movable pieces 22 is increased or decreased, the position of the second connecting end is inevitably changed, thereby increasing or decreasing the opening area of the orifice 21.

Specifically, in order to ensure a certain adjustment margin, when the opening area of the orifice 21 is minimized, that is, when the opening area of the orifice 21 is minimized, a folded area must exist between every two adjacent movable pieces 22, so as to ensure that the orifice 21 is always in a closed shape when the opening area is adjusted, and no direct communication between the orifice 21 and the inner wall of the housing 10 is generated due to the movement of the position of one of the movable pieces 22.

It can be understood that when the opening area of the orifice 21 reaches the maximum, i.e. when the orifice 21 is the maximum, the area of the folded area may be 0 at this time, and two adjacent movable sheets 22 abut against each other to ensure that the orifice 21 is in a closed shape.

In one embodiment, the adjustment range of the choke 21 may be selected according to the actual required cooling capacity and heating capacity of the air conditioning apparatus, which is not limited herein.

In one embodiment, the refrigerant throttling channel 13 is generally cylindrical, all the movable plates 22 are arranged in a stacked manner along the circumference, and all the movable plates 22 rotate relative to the housing 10, and at this time, the area of the folded area between two adjacent movable plates 22 is increased or decreased to decrease or increase the opening area of the throttling port 21.

Therefore, the throttle orifice 21 can realize the size adjustment of the opening area through the rotary motion of the movable piece 22, and the control is simple and easy to realize.

Specifically, the plurality of movable pieces 22 may be arranged not in a common circle but in a common circle. A certain folding area can exist between each movable piece 22 and the movable pieces 22 adjacent to the movable pieces 22 on both sides, when each movable piece 22 moves towards or away from the center of the circumference where the movable piece 22 is located, the substitution pin of the folding area between the movable piece 22 on both sides is increased or reduced, and the opening area of the throttling opening 21 enclosed by the inner parts of all the movable pieces 22 is also increased or reduced, so that the opening area of the throttling opening 21 is increased or reduced.

In other embodiments, the refrigerant throttling channel 13 may take other shapes, and the shape and size of the movable plate 22 are adjusted according to the actual setting of the refrigerant throttling channel 13, which is not limited herein.

Further, the shape of each movable piece 22 may be any shape such as triangle, sector, rectangle, etc., and the present application is not limited thereto.

In one embodiment, the air conditioning apparatus includes a first control assembly 30, and the first control assembly 30 is used to control the movement of all the movable plates 22 to increase or decrease the opening area of the orifice 21.

In this way, the user can directly control to increase or decrease the area of the choke 21 through the first control assembly 30, thus realizing intelligent control.

Specifically, the first control assembly 30 includes a control member 31 and an operating member 32, the operating member 32 is in driving connection with all the movable plates 22, and the control member 31 is used for controlling the operating member 32 to drive all the movable plates 22 to rotate synchronously.

The control member 31 may be a solenoid valve structure, and the solenoid valve drives the operation member 32 to move linearly, and the operation member 32 is connected to all the movable pieces 22 through a corresponding structure, so as to be converted into circumferential rotation of the movable pieces 22.

Specifically, in one embodiment, as shown in fig. 8, a rotating gear 321 may be disposed at the periphery of all the movable plates 22, a running track may be formed inside the rotating gear 321, the outer side of the rotating gear 321 is meshed with a rack 322, and by providing a corresponding driving structure, the rack 322 is controlled to linearly move, so as to control the rotating gear 321 to rotate, thereby realizing the circumferential rotation of the movable plates 22.

In other embodiments, the specific driving mode of the operation member 32 with respect to the movable plate 22 is not limited, and the number of structures of the movable plate 22 is not limited as long as the opening and closing of the choke 21 can be achieved.

In one embodiment, the electronic expansion valve 100 further comprises a valve needle 40, the head of the valve needle 40 being capable of protruding into the orifice 21, and the head of the valve needle 40 being configured to be movable in the axial direction of the orifice 21 to adjust the opening of the electronic expansion valve 100.

It should be noted that, the opening degree of the electronic expansion valve 100 is set in the operation condition of the air conditioning apparatus, and during the operation process, the electronic expansion valve is adjusted according to the real-time operation condition of the air conditioning apparatus, so as to ensure that the air conditioning apparatus can operate with the best energy efficiency under the set operation condition. The more the head of the needle 40 protrudes into the orifice 21, the smaller the opening of the electronic expansion valve 100. The opening area of the orifice 21 is the maximum opening of the electronic expansion valve 100, and the maximum opening of the electronic expansion valve 100 is adjusted only when the operation condition of the air conditioning equipment changes.

For example, in one embodiment, when the air conditioning apparatus is in a cooling condition, the opening area of the orifice 21 of the electronic expansion valve 100 is adjusted to be increased, and then the electronic expansion valve 100 is started, and the opening range of the electronic expansion valve 100 is set to be 120-480, and during the cooling operation, the opening of the electronic expansion valve 100 is increased or reduced by the up-and-down movement of the valve needle 40.

Specifically, when the opening of the electronic expansion valve 100 is 120, the valve needle 40 extends into the throttle orifice 21 to the greatest extent, and only a small portion of the throttle orifice 21 can circulate the refrigerant, and when the opening of the electronic expansion valve 100 is 480, the valve needle 40 is completely separated from the throttle orifice 21, and the throttle orifice 21 is used for circulating the refrigerant, and the design of the valve needle 40 is the design of the conventional electronic expansion valve 100, which is not described in detail herein.

Referring to fig. 9, fig. 9 provides a graph in which L1 is the electronic expansion valve 100 with a larger opening area of the orifice 21, L2 is the electronic expansion valve 100 with a smaller opening area of the orifice 21, the abscissa is the opening of the electronic expansion valve 100, and the ordinate is the refrigerant flow value.

It can be seen that when the opening of the electronic expansion valve 100 is constant, the flow rate value is large when the opening area of the orifice 21 is large, and the flow rate value is small when the opening area of the orifice 21 is small. When the opening area of the orifice 21 is constant, the flow rate gradually increases as the opening of the electronic expansion valve 100 increases, the orifice 21 is fully opened, and the opening of the electronic expansion valve 100 is maximized.

In one embodiment, the air conditioning apparatus further comprises a second control assembly 50, the second control assembly 50 being adapted to control the reciprocating movement of the valve needle 40 in the axial direction of the restriction 21.

The second control unit 50 may also be a solenoid valve or the like to achieve self-adjustment of the opening degree of the electronic expansion valve 100, which is not limited herein.

The present application also provides an electronic expansion valve 100 in the air conditioning apparatus, and specific features thereof are described above and will not be repeated here.

The air conditioning equipment provided by the application can control the opening area increase of the throttle orifice 21 when the refrigerant with large flow is needed, and can control the opening area reduction of the throttle orifice 21 when the refrigerant with small flow is needed, so that the caliber of the electronic expansion valve 100 can be automatically adjusted according to requirements in different operation modes, the energy efficiency of the air conditioning equipment is guaranteed to be optimal, and the electronic expansion valve 100 is a single part, so that the refrigerating system is simple in structure and low in cost.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (15)

1. An air conditioning apparatus, comprising:

a refrigeration system comprising an electronic expansion valve (100), the electronic expansion valve (100) having a refrigerant throttling passage (13), the refrigerant throttling passage (13) having a throttling orifice (21);

wherein the opening area of the throttle opening (21) is configured to be able to increase or decrease with the operation mode of the air conditioning apparatus.

2. An air conditioning apparatus according to claim 1, characterized in that the air conditioning apparatus has a cooling mode in which the electronic expansion valve (100) is controlled to increase the opening area of the orifice (21).

3. An air conditioning apparatus according to claim 1, characterized in that the air conditioning apparatus has a heating mode in which the electronic expansion valve (100) is controlled to reduce the opening area of the orifice (21).

4. An air conditioning apparatus according to any of claims 1-3, characterized in that the electronic expansion valve (100) comprises a housing (10) and a movable member (20), the housing (10) has the refrigerant throttling channel (13) therein, and the movable member (20) is movably disposed in the refrigerant throttling channel (13) and forms the throttling port (21) therein;

the movable member (20) is controlled to move relative to the housing (10) to increase or decrease the opening area of the orifice (21).

5. Air conditioning plant according to claim 4, characterized in that the housing (10) comprises an inlet pipe (11) and an outlet pipe (12), the inlet pipe (11) and the outlet pipe (12) being both in communication with the refrigerant throttling channel (13), and the throttling orifice (21) being in communication between the inlet pipe (11) and the outlet pipe (12).

6. The air conditioning apparatus according to claim 4, wherein the movable member (20) includes a plurality of movable pieces (22), one end of all the movable pieces (22) being connected to the housing (10), and the other end being surrounded by the throttle opening (21);

wherein at least one of the movable pieces (22) moves relative to the housing (10) to reduce or increase the opening area of the orifice (21).

7. An air conditioning apparatus according to claim 6, characterized in that all the movable pieces (22) are arranged in a superimposed manner along the circumference, and all the movable pieces (22) are rotated relative to the casing (10) to reduce or increase the opening area of the throttle opening (21).

8. An air conditioning apparatus according to claim 7, characterized in that the air conditioning apparatus comprises a first control assembly (30), the first control assembly (30) being adapted to control the rotation of all the moving blades (22) to increase or decrease the opening area of the orifice (21).

9. The air conditioning apparatus according to claim 8, characterized in that said first control assembly (30) comprises a control member (31) and an operating member (32), said operating member (32) being in driving connection with all of said mobile sheets (22);

the control piece (31) is used for controlling the operation piece (32) to drive all the movable pieces (22) to synchronously rotate relative to the shell (10).

10. The air conditioning apparatus according to claim 1, characterized in that the electronic expansion valve (100) further comprises a valve needle (40), the head of the valve needle (40) being able to extend into the orifice (21);

and the head of the valve needle (40) is configured to be movable in the axial direction of the orifice (21) to adjust the opening degree of the electronic expansion valve (100).

11. An air conditioning unit according to claim 10, characterized in that the air conditioning unit further comprises a second control assembly (50), the second control assembly (50) being adapted to control the reciprocating movement of the valve needle (40) in the axial direction of the restriction (21).

12. An electronic expansion valve, comprising:

the device comprises a shell (10) and a movable piece (20), wherein a refrigerant throttling channel (13) is arranged in the shell (10), and the movable piece (20) is movably arranged in the refrigerant throttling channel (13) and is surrounded to form a throttling port (21);

the movable member (20) is controlled to move relative to the housing (10) and to increase or decrease the area of the orifice (21).

13. The electronic expansion valve according to claim 12, wherein the movable member (20) includes a plurality of movable pieces (22), one end of all the movable pieces (22) is connected to the housing (10), and the other end is surrounded to form the orifice (21);

wherein at least one of the movable pieces (22) moves relative to the housing (10) to reduce or increase the opening area of the orifice (21).

14. Electronic expansion valve according to claim 13, characterized in that all the movable pieces (22) are arranged in pairs superimposed along the circumference, all the movable pieces (22) being rotated relative to the housing (10) to reduce or increase the opening area of the orifice (21).

15. The electronic expansion valve according to claim 12, characterized in that the electronic expansion valve (100) further comprises a valve needle (40), the head of the valve needle (40) being able to extend into the orifice (21);

and the head of the valve needle (40) is configured to be movable in the axial direction of the orifice (21) to adjust the opening degree of the electronic expansion valve (100).

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