Air conditioning apparatus

Abstract

The application relates to an air conditioning device, specifically comprising a refrigeration system, the refrigeration system comprising an electronic expansion valve, the electronic expansion valve having a refrigerant throttling channel, the refrigerant throttling channel having a throttling opening, wherein the opening area of the throttling opening is configured to be capable of being increased or reduced according to the operation mode of the air conditioner. When a large flow of refrigerant is required, the throttling opening can be controlled to be increased, and when a small flow of refrigerant is required, the throttling opening can be controlled to be reduced, so that the caliber of the electronic expansion valve can be automatically adjusted according to requirements in different operation modes, so as to ensure that the energy efficiency of the air conditioning device is optimal. Moreover, the electronic expansion valve is a single part, and multiple systems for controlling the air conditioner in different modes are not required, so that the structure of the refrigeration system is simple, and the cost is low.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air conditioning device. Background Technology

[0002] A multi-functional heat pump water heater is a unit that can heat and produce hot water in heating mode, and cool and chill water in cooling mode, providing a variety of outlet water and air temperatures to meet customers' multi-functional needs for air conditioning.

[0003] There are two design methods for the electronic expansion valve of existing heat pump water heaters. The first is a design based on the heating mode, and the second adopts a dual electronic expansion valve design, with each mode operating in conjunction with an electronic expansion valve, so that the air conditioner achieves optimal performance and energy efficiency in both heating and cooling modes.

[0004] However, the first design approach neglects cooling performance and energy efficiency, resulting in low cooling performance and energy efficiency of the heat pump water system. The second design approach, while improving cooling performance and energy efficiency, increases the complexity of the air conditioning system and raises costs. Summary of the Invention

[0005] Based on this, it is necessary to address the problem that multi-functional water chillers cannot simultaneously achieve both cooling and heating performance without increasing costs. Therefore, an air conditioning device and electronic expansion valve are proposed that can guarantee both cooling and heating performance while reducing the complexity of the refrigeration system and lowering air conditioning costs.

[0006] This application provides an air conditioning device, including:

[0007] A refrigeration system, including an electronic expansion valve having a refrigerant throttling passage having a throttling orifice;

[0008] The opening area of ​​the throttling orifice is configured to increase or decrease depending on the operating mode of the air conditioning equipment.

[0009] In one embodiment, the air conditioning device has a cooling mode in which the electronic expansion valve is controlled to increase the opening area of ​​the throttling orifice.

[0010] In one embodiment, the air conditioning device has a heating mode in which the electronic expansion valve is controlled to reduce the opening area of ​​the throttling orifice.

[0011] In one embodiment, the electronic expansion valve includes a housing and a movable component. The housing has the refrigerant throttling channel, and the movable component is movably disposed within the refrigerant throttling channel and has the throttling orifice formed inside it.

[0012] The movable component is controlled to move relative to the housing to increase or decrease the opening area of ​​the throttling orifice.

[0013] In one embodiment, the electronic expansion valve includes a housing and a movable component. The housing has the refrigerant throttling channel, and the movable component is movably disposed within the refrigerant throttling channel and has the throttling orifice formed inside it.

[0014] The movable component is controlled to move relative to the housing to increase or decrease the opening area of ​​the throttling orifice.

[0015] In one embodiment, the housing includes an inlet pipe and an outlet pipe, both of which are connected to the refrigerant throttling channel, and the throttling port is connected between the inlet pipe and the outlet pipe.

[0016] In one embodiment, the movable element includes a plurality of movable pieces, one end of all the movable pieces being connected to the housing, and the other end forming the throttling orifice;

[0017] At least one of the movable plates moves relative to the housing to reduce or increase the opening area of ​​the throttling orifice.

[0018] In one embodiment, all the movable plates are arranged in pairs along the circumference, and all the movable plates rotate relative to the housing to reduce or increase the opening area of ​​the throttling orifice.

[0019] In one embodiment, the air conditioning device includes a first control component for controlling all of the movable vanes to rotate to increase or decrease the opening area of ​​the throttling orifice.

[0020] In one embodiment, the first control component includes a control element and an operating element, the operating element being driven connected to all of the active plates;

[0021] The control element is used to control the operating element to drive all the movable pieces to rotate synchronously relative to the housing.

[0022] In one embodiment, the electronic expansion valve further includes a valve needle, the head of which can extend into the throttling orifice;

[0023] Furthermore, the head of the valve needle is configured to move along the axial direction of the throttle orifice to adjust the opening of the electronic expansion valve.

[0024] In one embodiment, the air conditioning device further includes a second control component for controlling the valve needle to reciprocate along the axial direction of the throttling orifice.

[0025] According to another aspect of this application, an electronic expansion valve is also provided, including a housing and a movable component, wherein the housing has a refrigerant throttling channel, and the movable component is movably disposed within the refrigerant throttling channel and surrounds it to form a throttling orifice;

[0026] The movable component is controlled to move relative to the housing and to increase or decrease the area of ​​the throttling orifice.

[0027] In one embodiment, the movable element includes a plurality of movable pieces, one end of all the movable pieces being connected to the housing, and the other end forming the throttling orifice;

[0028] At least one of the movable plates moves relative to the housing to reduce or increase the opening area of ​​the throttling orifice.

[0029] In one embodiment, all the movable plates are arranged in pairs along the circumference, and all the movable plates rotate relative to the housing to reduce or increase the opening area of ​​the throttling orifice.

[0030] In one embodiment, the electronic expansion valve further includes a valve needle, the head of which can extend into the throttling orifice;

[0031] Furthermore, the head of the valve needle is configured to move along the axial direction of the throttle orifice to adjust the opening of the electronic expansion valve.

[0032] The aforementioned air conditioning equipment includes a refrigeration system with an electronic expansion valve. The throttling orifice of the refrigerant throttling channel of the electronic expansion valve can be enlarged or reduced according to the operating mode of the air conditioning equipment. When a large flow of refrigerant is required, the throttling orifice can be enlarged, and when a small flow of refrigerant is required, the throttling orifice can be reduced. This allows the diameter of the electronic expansion valve to be automatically adjusted according to different operating modes to ensure optimal energy efficiency of the air conditioning equipment. Furthermore, the electronic expansion valve is a single component, which makes the structure of the refrigeration system simple and the cost low. Attached Figure Description

[0033] Figure 1 A schematic diagram of the structure of an electronic expansion valve according to an embodiment of this application is shown;

[0034] Figure 2 It shows Figure 1 A schematic diagram of the first-angle cross-sectional structure of the electronic expansion valve in heating mode provided in the image;

[0035] Figure 3 It shows Figure 1 A schematic diagram of the second-angle cross-sectional structure of the electronic expansion valve in heating mode provided in the image;

[0036] Figure 4 It shows Figure 1A partial structural diagram of the electronic expansion valve in heating mode provided in the diagram;

[0037] Figure 5 It shows Figure 1 A schematic diagram of the first-angle cross-sectional structure of the electronic expansion valve in cooling mode provided in the image;

[0038] Figure 6 It shows Figure 1 A schematic diagram of the second-angle cross-sectional structure of the electronic expansion valve in cooling mode provided in the image;

[0039] Figure 7 It shows Figure 1 A partial structural diagram of the electronic expansion valve in cooling mode provided in the diagram;

[0040] Figure 8 It shows Figure 1 A partial structural diagram of the electronic expansion valve provided in the document;

[0041] Figure 9 for Figure 1 The graph provided shows the flow rate versus opening degree of the electronic expansion valve.

[0042] Figure label:

[0043] 100. Electronic expansion valve; 10. Housing; 11. Inlet pipe; 12. Outlet pipe; 13. Refrigerant throttling channel; 20. Moving part; 21. Throttling orifice; 22. Moving plate; 30. First control component; 31. Control component; 32. Operating component; 321. Rotary gear; 322. Rack; 40. Valve needle; 50. Second control component. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] Unless otherwise defined, 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 specification of this 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.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0051] The accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0052] A multi-functional heat pump water heater with both cooling and heating capabilities typically includes a compressor, condenser, evaporator, expansion valve, and four-way reversing valve in its refrigeration system. When the system is cooling, the compressor draws in low-pressure working fluid vapor from the evaporator, increases its pressure, and sends it to the condenser. In the condenser, it condenses into a higher-pressure liquid. After being throttled by the expansion valve, it becomes a lower-pressure liquid and is sent to the evaporator. In the evaporator, it absorbs heat and evaporates into lower-pressure vapor, which is then sent back to the compressor inlet, thus completing the refrigeration cycle. When the system is heating, the four-way valve reverses the direction of rotation; in this case, the evaporator functions as both the condenser and the evaporator.

[0053] There are two design methods for the electronic expansion valve in existing multi-functional heat pump water heaters. The first is designed according to the heating mode. Although this setting can achieve good performance and energy efficiency in the heating mode, it ignores the performance and energy efficiency in the cooling mode, resulting in low cooling performance and energy efficiency of the heat pump water heater.

[0054] The second type employs a dual electronic expansion valve design, with each mode operating with its own electronic expansion valve to optimize performance and energy efficiency in both modes. However, while this approach improves cooling performance and energy efficiency, it increases the complexity of the air conditioning system and raises costs.

[0055] To solve the above problems, see Figures 1 to 3 This application provides an air conditioning device, including a refrigeration system. It is understood that the refrigeration system of this application can both cool and heat.

[0056] The refrigeration system includes an electronic expansion valve 100, which has a refrigerant throttling channel 13 and a throttling orifice 21, wherein the opening area of ​​the throttling orifice 21 is configured to increase or decrease depending on the operating mode of the air conditioner.

[0057] Specifically, when a large flow of refrigerant is required, the opening of the throttling orifice 21 can be increased; when a small flow of refrigerant is required, the opening of the throttling orifice 21 can be decreased. This allows the diameter of the electronic expansion valve 100 to be automatically adjusted according to different operating modes to ensure optimal energy efficiency of the air conditioning equipment. Furthermore, since the electronic expansion valve 100 is a single component, there is no need for multiple systems to control the air conditioning in different modes, resulting in a simpler and lower-cost refrigeration system structure.

[0058] In one embodiment, see [reference] Figures 2 to 4 The air conditioning equipment has a heating mode. When heating, the required refrigerant circulation flow rate of the system is small. Therefore, in the heating mode, the electronic expansion valve 100 is controlled to reduce the opening area of ​​the throttling orifice 21 of the refrigerant throttling channel 13 to reach the diameter required for heating, so as to ensure that more refrigerant is throttled and improve heating efficiency.

[0059] Further, see Figures 5 to 7 Air conditioning equipment has a cooling mode. When cooling, the required refrigerant circulation flow rate of the system is large. Therefore, in the cooling mode, the electronic expansion valve 100 is controlled to increase the opening area of ​​the throttling port 21 of the refrigerant throttling channel 13 to reach the required diameter for cooling, so as to ensure that more refrigerant passes through and improve cooling efficiency.

[0060] Specifically, the operating temperature, air outlet temperature, and water outlet temperature in cooling mode are customized according to the unit design, and the operating temperature, air outlet temperature, and water outlet temperature in heating mode are also customized according to the unit design. Understandably, a controller 31 structure can be set up so that the operator can select the cooling or heating function to determine the operating mode of the air conditioning equipment, and the electronic expansion valve 100 can be intelligently controlled to adjust the opening area of ​​its own throttling port 21.

[0061] In one embodiment, the electronic expansion valve 100 includes a housing 10 and a movable member 20. 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 orifice 21 inside. The movable member 20 is controlled to move relative to the housing 10 and increase or decrease the opening area of ​​the throttling orifice 21.

[0062] The size of the opening area of ​​the throttling orifice 21 is the size of its diameter. The diameter of the throttling orifice 21 can be increased or decreased by setting the movable part 20 to move within the housing 10. When the electronic expansion valve 100 is fully open, the maximum flow area of ​​the throttling orifice 21 in the refrigerant throttling channel 13 is the size of the opening area of ​​the throttling orifice 21.

[0063] Specifically, the casing 10 includes an inlet pipe 11 and an outlet pipe 12, both of which are connected to a refrigerant throttling channel 13, and a throttling orifice 21 is connected between the inlet pipe 11 and the outlet pipe 12. Refrigerant from upstream enters the refrigerant throttling channel 13 through the inlet pipe 11, flows through the throttling orifice 21, and then flows out through the outlet pipe 12, thus achieving a throttling effect.

[0064] In one embodiment, the movable member 20 includes a plurality of movable pieces 22, one end of which is connected to the housing 10, and the other end of which forms a throttling orifice 21. At least one of the movable pieces 22 moves relative to the housing 10 to reduce or increase the opening area of ​​the throttling orifice 21.

[0065] Specifically, the two ends of the movable piece 22 form a first connecting end and a second connecting end. The first connecting end of each movable piece 22 is connected to the housing 10, and the second connecting end of each movable piece 22 surrounds a throttling orifice 21. When the position of any movable piece 22 increases or decreases, the position of the second connecting end will inevitably change, thereby increasing or decreasing the opening area of ​​the throttling orifice 21.

[0066] Specifically, in order to ensure a certain adjustment margin, when the opening area of ​​the throttle port 21 reaches its minimum, that is, when the opening area of ​​the throttle port 21 is at its minimum, there must be a folding area between each two adjacent movable plates 22. This ensures that when the opening area is adjusted, the throttle port 21 is always in a closed shape, and the throttle port 21 will not be directly connected to the inner wall of the housing 10 due to the movement of the position of one of the movable plates 22.

[0067] Understandably, when the opening area of ​​the throttle orifice 21 reaches its maximum, that is, when the throttle orifice 21 is at its maximum, the area of ​​the folded region can be 0, and the two adjacent movable pieces 22 abut against each other to ensure that the throttle orifice 21 is in a closed shape.

[0068] In one embodiment, the adjustment range of the throttle orifice 21 can be selected according to the actual cooling and heating capacity required by the air conditioning equipment, which is not limited in this application.

[0069] In one embodiment, the refrigerant throttling channel 13 is generally cylindrical, and all the movable plates 22 are stacked in pairs along the circumference. All the movable plates 22 rotate relative to the housing 10. At this time, the area of ​​the folded area between two adjacent movable plates 22 increases or decreases, so as to reduce or increase the opening area of ​​the throttling port 21.

[0070] In this way, the size of the opening area of ​​the throttling orifice 21 can be adjusted by the rotational movement of the movable piece 22, which is simple and easy to control.

[0071] Specifically, the multiple movable plates 22 may be arranged either not on the same circle or on the same circle. There may be a certain folding area between each movable plate 22 and the two adjacent movable plates 22 on both sides. When one of the movable plates 22 moves towards or away from the center of its own circumference, the folding area between it and the movable plates 22 on both sides increases or decreases, and the opening area of ​​the throttling orifice 21 enclosed inside all the movable plates 22 also increases or decreases, thereby increasing or decreasing the opening area of ​​the throttling orifice 21.

[0072] In other embodiments, the refrigerant throttling channel 13 may also take other shapes. In this case, the shape and size of the movable piece 22 shall be adjusted according to the actual setting of the refrigerant throttling channel 13, and this application does not impose any restrictions.

[0073] Furthermore, the shape of each active piece 22 can be any shape such as a triangle, a sector, or a rectangle, and this application does not limit it.

[0074] In one embodiment, the air conditioning device includes a first control component 30 for controlling the movement of all movable vanes 22 to increase or decrease the opening area of ​​the throttling orifice 21.

[0075] In this way, users can directly control the size of the throttle orifice 21 by increasing or decreasing the size of the area through the first control component 30, thus realizing intelligent control.

[0076] Specifically, the first control component 30 includes a control element 31 and an operating element 32. The operating element 32 is drivenly connected to all the movable pieces 22, and the control element 31 is used to control the operating element 32 to drive all the movable pieces 22 to rotate synchronously.

[0077] The control component 31 can be a solenoid valve structure. The solenoid valve drives the operating component 32 to move linearly. The operating component 32 is connected to all the movable plates 22 through a corresponding structure, thereby converting it into the circumferential rotation of the movable plates 22.

[0078] Specifically, in one embodiment, such as Figure 8 As shown, a rotating gear 321 can be set around all the movable pieces 22. The interior of the rotating gear 321 forms a running track. The outer side of the rotating gear 321 meshes with the rack 322. By setting a corresponding drive structure, the rack 322 is controlled to move linearly, thereby controlling the rotating gear 321 to rotate, and thus realizing the circumferential rotation of the movable pieces 22.

[0079] In other embodiments, the specific driving form of the operating element 32 for the movable piece 22 is not limited, and the number of movable pieces 22 is not limited, as long as the opening and closing of the throttle port 21 can be realized. This application does not impose any limitations on this.

[0080] In one embodiment, the electronic expansion valve 100 further includes a valve needle 40, the head of which is capable of extending into the throttle orifice 21, and the head of the valve needle 40 is configured to move along the axial direction of the throttle orifice 21 to adjust the opening of the electronic expansion valve 100.

[0081] It is worth noting that the opening of the electronic expansion valve 100 is adjusted during operation based on the real-time operating conditions of the air conditioning equipment, given that the operating conditions are already fixed, to ensure optimal energy efficiency under the set conditions. The more the valve needle 40 extends into the throttling orifice 21, the smaller the opening of the electronic expansion valve 100. The opening area of ​​the throttling orifice 21 represents the maximum opening of the electronic expansion valve 100, which is only adjusted when the operating conditions of the air conditioning equipment change.

[0082] For example, in one embodiment, when the air conditioning equipment is in cooling mode, the opening area of ​​the throttling port 21 of the electronic expansion valve 100 is first increased, and then the machine is turned on, setting the opening range of the electronic expansion valve 100 to 120-480. During the cooling operation, the opening of the electronic expansion valve 100 is increased or decreased by the up and down movement of the valve needle 40.

[0083] Specifically, when the opening degree of the electronic expansion valve 100 is 120°, the valve needle 40 extends into the throttling orifice 21 to the maximum extent, and only a very small part of the throttling orifice 21 can flow with refrigerant. When the opening degree of the electronic expansion valve 100 is 480°, the valve needle 40 is completely disengaged from the throttling orifice 21, and the entire throttling orifice 21 is used to flow with refrigerant. The design of the valve needle 40 is the design of the traditional electronic expansion valve 100, which will not be described in detail here.

[0084] See Figure 9 , Figure 9 A graph is provided, where L1 represents the electronic expansion valve 100 with a larger opening area of ​​the throttling orifice 21, and L2 represents the electronic expansion valve 100 with a smaller opening area of ​​the throttling orifice 21. The horizontal axis represents the opening degree of the electronic expansion valve 100, and the vertical axis represents the refrigerant flow rate.

[0085] It can be seen that when the opening degree of the electronic expansion valve 100 is constant, the flow rate is large when the opening area of ​​the throttle orifice 21 is large, and the flow rate is small when the opening area of ​​the throttle orifice 21 is small. When the opening area of ​​the throttle orifice 21 is constant, the flow rate gradually increases as the opening degree of the electronic expansion valve 100 increases, and the opening degree of the electronic expansion valve 100 is at its maximum when the throttle orifice 21 is fully open.

[0086] In one embodiment, the air conditioning device further includes a second control component 50 for controlling the valve needle 40 to reciprocate along the axial direction of the throttle port 21.

[0087] The second control component 50 can also be a structure such as a solenoid valve to achieve self-adjustment of the opening degree of the electronic expansion valve 100. This application does not limit it here.

[0088] This application also provides an electronic expansion valve 100 for the above-mentioned air conditioning equipment, the specific features of which have been described above and will not be repeated here.

[0089] The air conditioning equipment provided in this application can control the opening area of ​​the throttling orifice 21 to increase when a large flow of refrigerant is required, and can control the opening area of ​​the throttling orifice 21 to decrease when a small flow of refrigerant is required. This allows the diameter of the electronic expansion valve 100 to be automatically adjusted according to different operating modes to ensure the best energy efficiency of the air conditioning equipment. Furthermore, the electronic expansion valve 100 is a single component, which makes the structure of the refrigeration system simple and the cost low.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An air conditioning apparatus characterized by comprising: include: The refrigeration system includes an electronic expansion valve (100) having a refrigerant throttling passage (13) having a throttling orifice (21). The opening area of ​​the throttling orifice (21) is configured to increase or decrease depending on the operating mode of the air conditioning equipment; The refrigerant throttling channel (13) is cylindrical. The electronic expansion valve (100) includes a housing (10) and a movable part (20). The housing (10) contains the refrigerant throttling channel (13). The movable part (20) includes multiple movable plates (22). One end of all the movable plates (22) is connected to the housing (10), and the other end is arranged to form the throttling orifice (21). All the movable plates (22) are arranged in pairs along the circumference. All the movable plates (22) rotate relative to the housing (10) to reduce or increase the opening area of ​​the throttling orifice (21). All of the movable plates (22) are provided with a rotating gear (321) on their periphery. The rotating gear (321) forms a running track inside. The rotating gear (321) meshes with the rack (322) on its outer side. The electronic expansion valve (100) also includes a drive structure. The drive structure controls the rack (322) to move linearly in order to control the rotating gear (321) to rotate. The two ends of the movable piece (22) form a first connection end and a second connection end. The first connection end of each movable piece (22) is connected to the housing (10), and the second connection end of each movable piece (22) surrounds the throttle port (21). The electronic expansion valve (100) also includes a valve needle (40) whose head can extend into the throttle port (21); and the head of the valve needle (40) is configured to move along the axial direction of the throttle port (21) to adjust the opening of the electronic expansion valve (100).

2. The air conditioning equipment according to claim 1, characterized in that, When the opening area of ​​the throttling port (21) is at its minimum, there is a folded area between every two adjacent movable plates (22).

3. The air conditioning apparatus according to claim 1, wherein The air conditioning equipment has a cooling mode, in which the electronic expansion valve (100) is controlled to increase the opening area of ​​the throttling orifice (21).

4. The air conditioning apparatus according to claim 1, wherein The air conditioning equipment has a heating mode, in which the electronic expansion valve (100) is controlled to reduce the opening area of ​​the throttling orifice (21).

5. The air conditioning apparatus according to claim 1, wherein The housing (10) includes an inlet pipe (11) and an outlet pipe (12). Both the inlet pipe (11) and the outlet pipe (12) are connected to the refrigerant throttling channel (13), and the throttling port (21) is connected between the inlet pipe (11) and the outlet pipe (12).

6. The air conditioning apparatus according to claim 1, wherein The air conditioning equipment includes a first control component (30) for controlling all of the movable blades (22) to rotate to increase or decrease the opening area of ​​the throttling orifice (21).

7. The air conditioning apparatus according to claim 6, wherein The first control component (30) includes a control element (31) and an operating element (32), wherein the operating element (32) is drivenly connected to all of the movable pieces (22); The control member (31) is used for controlling the operation member (32) to drive all the movable pieces (22) to rotate synchronously relative to the shell (10).

8. The air conditioning apparatus according to claim 1, wherein The air conditioning equipment further comprises a second control assembly (50), which is used for controlling the valve needle (40) to reciprocate along the axial direction of the throttle (21).

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