Ejector

Abstract

The invention discloses an ejector which comprises a control assembly, a body part and a nozzle part, the control assembly comprises a driving part, a valve needle part and a shell, the body part comprises a body, and the ejector is characterized by further comprising a connecting part and a clamping part, one side of the connecting part is fixedly connected with the body, and the other side of the connecting part is fixedly connected with the shell. One side of the connecting part is fixedly connected with the valve needle, the other side of the connecting part is fixedly connected with the shell, the connecting part comprises a clamping installation part, the clamping part is arranged on the clamping installation part, the clamping part comprises a rotation limiting part, and the rotation limiting part can limit rotation displacement of the valve needle relative to the body. According to the technical scheme, the compactness of the internal structure of the ejector can be improved.

Description

[0001] This application claims priority to the following Chinese patent application, the entire contents of which are incorporated herein by reference: Application number: 202311008574.9, Application date: August 10, 2023, Applicant: Zhejiang Sanhua Commercial Refrigeration Co., Ltd., Invention name: An ejector Technical Field

[0002] The invention belongs to the technical field of fluid control, and in particular relates to an injector. Background Art

[0003] As a fluid control device, the ejector is widely used. The ejector generally includes a body unit and an ejection unit. The ejection unit includes a driving component, a valve needle component and a nozzle component. When the ejector is working, two fluids of different pressures mix with each other and exchange energy, forming a medium-pressure fluid that flows out from the outlet. How to improve the compactness of the internal structure of the ejector is an issue that technicians in this field need to pay attention to. Summary of the invention

[0004] The injector provided by the present invention comprises a control component, a body component and a nozzle component, the control component comprises a driving component, a valve needle component and a shell, the body component comprises a body, the nozzle component comprises a nozzle, the valve needle component comprises a valve needle, and the valve needle portion is located in the nozzle chamber of the nozzle; it also comprises a connecting component and a retaining member, one side of the connecting component is fixedly connected to the body, and the other side of the connecting component is fixedly connected to the shell, the connecting component comprises a retaining mounting portion, the retaining member is arranged on the retaining mounting portion, the retaining member comprises a rotation limiting portion, the valve needle passes through the rotation limiting portion, the driving component can drive the valve needle to move axially along the nozzle, and the rotation limiting portion can limit the rotational displacement of the valve needle relative to the body.

[0005] The injector provided by the present invention arranges the retaining piece on the connecting component, so that the retaining piece is easy to install and the compactness of the internal structure of the injector is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 : A schematic diagram of the structure of an ejector provided by the present invention;

[0007] Figure 2 : Figure 1 A partial enlarged schematic diagram of the middle A area;

[0008] Figure 3 : Figure 1 A partial enlarged schematic diagram of the middle B area;

[0009] Figure 4 : Figure 1A schematic diagram of the structure of the connection parts;

[0010] Figure 5 : A schematic diagram of the structure of the two kinds of positioning members and the valve core provided by the present invention;

[0011] Figure 6 : A schematic structural diagram of another connecting component coordination provided by the present invention.

[0012] Figure 1-Figure 6 Explanation of symbols:

[0013] 10- ejector;

[0014] 100-body component;

[0015] 110-Ontology;

[0016] 121-high-pressure fluid inlet pipe, 122-low-pressure fluid inlet pipe, 123-injection pipe; 131-high-pressure fluid inlet channel, 132-low-pressure fluid inlet channel;

[0017] 133-export end, 134-receiving cavity;

[0018] 135-body cavity;

[0019] 1311 - outlet end 1311 of the high pressure fluid inlet channel;

[0020] 200- driving components;

[0021] 300- transmission parts;

[0022] 310-input gear, 320 intermediate gear, 330-output gear;

[0023] 340-screw;

[0024] 400-valve needle parts;

[0025] 410-valve needle;

[0026] 411-matching section, 412-matching surface;

[0027] 500-housing;

[0028] 510-lower housing, 520-upper housing;

[0029] 530-housing cavity;

[0030] 600-connecting parts;

[0031] 601-Balanced flow channel;

[0032] 610-first connector;

[0033] 612-first balancing flow channel;

[0034] 613-driving component installation part;

[0035] 614-external thread;

[0036] 615-center inner hole;

[0037] 616-step part;

[0038] 620 / 620A-second connector;

[0039] 622-second balancing flow channel;

[0040] 623-accommodation chamber;

[0041] 624-internal thread;

[0042] 625-Center step portion / card installation portion;

[0043] 630-Mounting kit;

[0044] 700-nozzle parts;

[0045] 710-nozzle;

[0046] 740-nozzle chamber;

[0047] 750-hexagon socket;

[0048] 810- card position piece;

[0049] 811 / 811A-cylindrical part / rotation limiting part;

[0050] 812- radial extension;

[0051] 813 / 813A-limited surface;

[0052] 820-limiting piece;

[0053] 821- axial limiting portion;

[0054] 822- radial restriction portion;

[0055] 830-Bearing. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts relative to each other shown in the drawings. They are only for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application; it should also be understood that the structural relationships such as connection, fixation, and abutment described in this article, except for special instructions to reflect its inventive ideas, should include direct and indirect methods.

[0057] Figure 1 A schematic diagram of the structure of an ejector provided by the present invention is shown in FIG. Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A area, Figure 3 for Figure 1 A partial enlarged schematic diagram of area B in the middle. Figure 4 for Figure 1 Schematic diagram of the structure of the connection parts.

[0058] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The injector 10 comprises three parts: a control assembly, a body part 100 and a nozzle part 700. The control assembly comprises a housing 500, a driving part 200, a transmission part 300 and a valve needle part 400.

[0059] The body component 100 includes a body 110, a high-pressure fluid inlet pipe 121, a low-pressure fluid inlet pipe 122 and an injection pipe 123. The high-pressure fluid inlet pipe 121, the low-pressure fluid inlet pipe 122 and the injection pipe 123 are fixed to the body 110 by welding. The body component 100 has a high-pressure fluid inlet channel 131, a low-pressure fluid inlet channel 132 and an outlet port 133. The body 110 includes a body inner cavity 135, and the body inner cavity 135 includes a receiving cavity 134, and the receiving cavity 134 connects the low-pressure fluid inlet channel 132 and the outlet port 133.

[0060] The nozzle component 700 includes a nozzle 710, which is located in the body inner cavity 135. The nozzle component 700 includes a nozzle cavity 740, which is connected to the receiving cavity 134. The housing 500 is cylindrical and has a housing inner cavity 530. The housing 500 includes a lower housing 510 and an upper housing 520, and the lower housing 510 and the upper housing 520 are fixedly connected by welding.

[0061] The injector 10 also includes a connecting component 600 and a retaining member 810. The connecting component 600 includes a first connecting body 610 and a second connecting body 620, one side of the first connecting body 610 is fixedly connected to the lower shell 510, and one side of the second connecting body 620 is fixedly connected to the body 110. The outer edge of the first connecting body 610 includes an external thread 614. The second connecting body 620 is roughly cylindrical and includes a accommodating cavity 623 and a central step portion 625. An internal thread 624 is provided on the side wall of the accommodating cavity 623, so that the first connecting body 610 and the second connecting body 620 are fixedly connected by threads. The central step portion 625 serves as a retaining mounting portion 625, and the retaining member 810 is provided on the retaining mounting portion 625.

[0062] Figure 5 The figure is a schematic diagram of the structure of the cooperation between two kinds of positioning members and valve cores provided by the present invention.

[0063] like Figure 5 As shown, and refer to Figure 2 , Figure 3 and Figure 4 The retaining member 810 can be formed by drawing a thin-walled tubular metal or by die-casting a metal powder, and includes a cylindrical portion 811 and a radially extending portion 812. The radially extending portion 812 abuts against the step surface of the retaining mounting portion (center step portion) 625 and is fixed by welding. The valve needle component 400 includes a valve needle 410, and the front section of the valve needle 410 is located in the nozzle cavity 740 of the nozzle 710. The cylindrical portion 811 serves as a rotation limiting portion 811, and the rear section of the valve needle 410 is penetrated by the rotation limiting portion 811.

[0064] As a specific implementation scheme, in FIG. A, the cross section of the entire cylindrical portion 811 is a non-circular shape (such as a square), and its inner wall surface serves as a limiting surface 813. The front section and rear section of the valve needle 410 are two-body structures, and at least part of the rear section or the front section serves as a matching section 411, and the matching section 411 is a non-circular shape (such as a square) as a matching surface 412. The limiting surface 813 cooperates with the matching surface 412 to limit the rotational displacement of the valve needle 410 relative to the body 110.

[0065] The difference from the above technical solution is that the cylindrical portion 811A in FIG. B includes a limiting surface 813A formed by stamping and protruding toward the inner circular wall. The limiting surface 813A cooperates with the matching surface 412 to limit the rotation displacement of the valve needle 410 relative to the body 110 .

[0066] The above technical solution installs the retaining member on the connecting component, and connects the main body and the shell through the connecting component, so that the retaining member is easy to install, reduces the occupied internal space, and improves the compactness of the internal structure of the injector.

[0067] As a further extended technical solution, the driving component 200 is specifically a driving motor, which is arranged in the inner cavity 530 of the shell. The driving component 200 can drive the valve needle 410 to move axially along the nozzle 710.

[0068] Specifically, the transmission component 300 includes a gear set and a screw 340. The gear set includes an input gear 310, an intermediate gear 320, and an output gear 330. The output gear 330 is fixedly connected or limitedly connected to the screw 340. The front section of the screw 340 includes an external thread section, and the valve needle 410 includes an internal thread section. The screw 340 and the valve needle 410 are connected by threads. At the same time, the screw 340 and the valve needle 410 can be matched in transmission. Due to the setting of the above-mentioned axial limiting part 811, when the screw 340 rotates and drives the valve needle 410 through the thread, the valve needle 410 cannot rotate but can only move axially relative to the screw 340.

[0069] As a further extended technical solution, a bearing 830 is also included, and the connecting component 600 also includes an installation kit 630. The installation kit 630 is sleeved on the first connecting body 610. The installation kit 630 includes a central inner hole 615 and an inner cavity as a driving component mounting portion 613, the driving component (motor) 200 is fixed to the driving component mounting portion 613, and the rotating shaft of the driving component 300 is fixedly connected to the input gear 310.

[0070] The screw rod 340 is passed through the central inner hole 615. The central inner hole 615 includes a step portion 616, the bearing 830 abuts against the step portion 616, the outer ring of the bearing 830 cooperates with the hole wall of the central inner hole 615, and the inner ring of the bearing 830 cooperates with the outer edge of the screw rod 340.

[0071] As a further extended technical solution, the connecting component 600 includes a balancing channel 601, and the balancing channel 601 includes a first balancing channel 612 and a second balancing channel 622. The first balancing channel 612 is located in the first connecting body 610, and the second balancing channel 622 is located in the second connecting body 620. The first balancing channel 612 is connected to the second balancing channel 622. The first balancing channel 612 is connected to the shell cavity 530, and the second balancing channel 622 is connected to the body cavity 135.

[0072] The above technical solution, by providing a balance channel 601 on the connecting component 600 to connect the shell cavity 530 with the body cavity 135, makes the fluid pressure in the internal cavity of the ejector relatively uniform, thereby improving the stability of the working state of the ejector 10. Moreover, since the ejector used in the refrigeration system contains refrigerant oil in the system fluid, the purpose of providing a balance channel is to prevent the refrigerant oil from being retained in the shell cavity due to the poor flow of the fluid, thereby affecting the operation effect of the driving component.

[0073] As a further technical solution, on the cross section along the flow direction of the high-pressure fluid inlet channel 131, the projection profile of the positioning member 810 in the length direction is defined as L1, and the projection profile of the outlet end 1311 of the high-pressure fluid inlet channel 131 is defined as L2, then L1 covers L2 (see Figure 2 In this embodiment, the direction of the high-pressure fluid inlet channel 131 is substantially perpendicular to the axial direction of the injector 10, so the projection of the flow channel direction of the high-pressure fluid inlet channel 131 is consistent with the projection of the outlet end.

[0074] With this design, when the high-pressure fluid enters the inner cavity of the injector 10, it can be blocked by the front of the blocking member 810, reducing the impact on the valve needle component 400 and reducing the hidden danger of the valve needle component 400 and the nozzle 710 getting stuck. The stability of the valve needle component adjustment process is improved, and the reliability of the injector 10 working in a high-pressure fluid environment is also improved.

[0075] As a further technical solution, a stopper 820 is also included. The stopper 820 is a thin-walled cylindrical structure. The bearing 830 abuts against the step portion 616. The stopper 820 axially abuts against the outer ring of the bearing 830 and is riveted and fixed to the installation kit 630. The lower end of the stopper 820 includes an axial stopper (cylindrical portion) 821, which can limit the displacement of the valve needle 410 axially moving in the direction of the driving component 200.

[0076] Figure 6 The figure is a schematic diagram of another structure of connecting parts provided by the present invention.

[0077] like Figure 6 As shown, the difference from the above technical solution is that in this embodiment, the first connector and the second connector of the connecting component 600 adopt an integrated structure as the connecting component body 640. The mounting kit 630 is sleeved on the connecting component body 640, and a balancing channel 601A is provided on the connecting component body 640. One side of the connecting component body 640 is threadedly fixedly connected to the body 110, and the other side of the connecting component body 640 is welded to the lower shell 510.

[0078] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An injector, comprising a control assembly, a body component and a nozzle component, wherein the control assembly comprises a driving component, a valve needle component and a housing, the body component comprises a body, the nozzle component comprises a nozzle, the valve needle component comprises a valve needle, and the valve needle portion is located in a nozzle chamber of the nozzle, characterized in that: It also includes a connecting component and a locking component, one side of the connecting component is fixedly connected to the main body, and the other side of the connecting component is fixedly connected to the shell, the connecting component includes a locking mounting portion, the locking component is arranged on the locking mounting portion, the locking component includes a rotation limiting portion, the valve needle passes through the rotation limiting portion, the driving component can drive the valve needle to move axially along the nozzle, and the rotation limiting portion can limit the rotational displacement of the valve needle relative to the main body.

2. The injector according to claim 1, characterized in that The main body has a body inner cavity, the nozzle is at least partially located in the body inner cavity, the shell has a shell inner cavity, the drive component is at least partially located in the shell inner cavity, and the connecting component includes a balancing channel, which connects the shell inner cavity with the body inner cavity.

3. The injector according to claim 2, characterized in that The locking mounting portion includes a central step portion, and the locking member includes a cylindrical portion and a radially extending portion. The radially extending portion is axially abutted and fixed to the central step portion, and the cylindrical portion serves as the rotation limiting portion.

4. The injector according to claim 3, characterized in that The cylindrical portion includes a limiting surface, and the valve needle includes a matching surface. The limiting surface matches with the matching surface to limit the rotational displacement of the valve needle relative to the body.

5. The injector according to claim 2, characterized in that The body component includes a high-pressure fluid inlet channel, and the projection contour of the retaining member on the cross section along the flow direction of the high-pressure fluid inlet channel covers the projection contour of the outlet end of the high-pressure fluid inlet channel in the length direction of the retaining member.

6. The injector according to any one of claims 2 to 5, characterized in that: The connecting component includes a first connecting body and a second connecting body, the first connecting body is fixedly connected to the second connecting body, the first connecting body is fixedly connected to the shell, and the second connecting body is fixedly connected to the body; the balancing channel includes a first balancing flow channel and a second balancing flow channel connected, the first balancing flow channel is located in the first connecting body, the second balancing flow channel is located in the second connecting body, and the clamping installation portion is located in the second connecting body.

7. The injector according to claim 6, characterized in that The connecting component further includes an installation kit, the first connecting body is sleeved with the installation kit, the installation kit includes a driving component installation portion, and the driving component is arranged on the driving component installation portion.

8. The injector according to claim 7, characterized in that It also includes a transmission component, which includes an input gear, an output gear and a screw rod. The input gear is rotationally connected to the driving component, the screw rod is transmission-connected to the valve needle, and the output gear is fixedly connected or limit-connected to the screw rod. The installation kit includes a central inner hole, and the screw rod is sleeved in the central inner hole.

9. The injector according to claim 8, characterized in that It also includes a bearing, the central inner hole includes a step portion, the bearing abuts against the step portion, the outer ring of the bearing cooperates with the hole wall of the central inner hole, and the inner ring of the bearing cooperates with the outer edge of the screw rod.

10. The injector according to claim 7, characterized in that It also includes a limiter, the installation kit includes a central inner hole, the central inner hole includes a step portion, the limiter includes a cylindrical portion and a radial extension portion, the radial extension portion is abutted and fixed to the step portion, the cylindrical portion serves as an axial limiting portion, and the axial limiting portion can limit the axial displacement of the valve needle in the direction of the driving component.

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