Ejector

Abstract

The invention discloses an ejector which comprises a shell, a body part and a nozzle part, the body part comprises a body, the body is provided with a body inner cavity, the nozzle part comprises a nozzle, at least part of the nozzle is located in the body inner cavity, the shell is provided with a shell inner cavity, and the ejector is characterized by further comprising a connecting part, one side of the connecting part is fixedly connected with the body, the other side of the connecting part is fixedly connected with the shell, the connecting part comprises a balance channel, and the balance channel is communicated with an inner cavity of the shell and an inner cavity of the body. According to the ejector provided by the invention, the stability of the working state 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 drive 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. When the system is running, the inner cavity of the product needs to pass high-pressure fluid, so the pressure resistance performance of the product is required to be high. Summary of the invention

[0004] The injector provided by the present invention comprises a shell, a body component and a nozzle component, wherein the body component comprises a body, the body having an inner cavity of the body, the nozzle component comprises a nozzle, the nozzle is at least partially located in the inner cavity of the body, and the shell has an inner cavity of the shell; the injector also comprises a connecting component, 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 balancing channel, and the balancing channel connects the inner cavity of the shell with the inner cavity of the body.

[0005] The injector provided by the present invention has a balancing channel opened on the connecting component, and the balancing channel connects the inner cavity of the shell and the inner cavity of the body, so that when the injector is working, the fluid pressure in the inner cavity is relatively uniform, thereby improving the stability of the working state of the injector. 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 4a and Figure 4b : Figure 1 A schematic diagram of the structure of the nozzle component;

[0010] Figure 5: Figure 1 A schematic diagram of the structure of the connection parts;

[0011] Figure 6 : A schematic diagram of another structure of connecting parts provided by the present invention;

[0012] Figure 7 : A schematic diagram of the matching structure of a connecting component and a driving component provided by the present invention. Figure 1-Figure 7 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- outlet end, 134- receiving cavity, 135- body cavity;

[0018] 200 / 200A-driving parts;

[0019] 210- stator;

[0020] 220- rotor, 221- outer wall;

[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] 500-housing;

[0027] 510-lower housing, 520-upper housing;

[0028] 530 / 530A-housing cavity;

[0029] 540-Protrusion / ring;

[0030] 600 / 600A-connecting parts;

[0031] 601 / 601A / 601B-Balanced channel;

[0032] 602-inner wall;

[0033] 610-first connector;

[0034] 611- first limiting portion / outer step portion;

[0035] 612-first balancing flow channel;

[0036] 613-driving component installation part;

[0037] 614-external thread;

[0038] 615-center inner hole, 616-step portion;

[0039] 620 / 620A-second connector;

[0040] 621 - second limiting portion / inner step portion;

[0041] 621A - second restriction / end portion;

[0042] 622-second balancing flow channel;

[0043] 623-accommodation chamber / transition chamber;

[0044] 624-internal thread;

[0045] 630-Mounting kit;

[0046] 640-connecting component body;

[0047] 700-nozzle parts;

[0048] 710-nozzle;

[0049] 720-positioning sleeve;

[0050] 721- positioning hole;

[0051] 730-Compression nut;

[0052] 740-nozzle chamber;

[0053] 750-hexagon socket;

[0054] 830-Bearing. DETAILED DESCRIPTION

[0055] 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 those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1The positions of the components shown in the figure are defined 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, abutment, etc. described in this article, unless otherwise specified to reflect the inventive concept, should include direct and indirect methods.

[0056] 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 4a and Figure 4b for Figure 1 Schematic diagram of the structure of the nozzle components.

[0057] like Figure 1 , Figure 2 , Figure 3 and Figure 4a and Figure 4b 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.

[0058] 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.

[0059] 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.

[0060] The injector 10 further includes a connecting component 600, one side of which is fixedly connected to the body 110, and the other side of which is fixedly connected to the lower shell 510. The connecting component 600 includes a balancing channel 601, which connects the shell inner cavity 530 with the body inner cavity 135.

[0061] The ejector 10 of the above technical solution connects the shell cavity 530 with the body cavity 135 by opening a balance channel 610 on the connecting component 6000, so that the fluid pressure in the internal cavity of the ejector is relatively uniform, thereby improving the stability of the working state of the ejector 10; and, a further effect is that, for the ejector used in the refrigeration system, since there will be refrigerant oil in the system fluid, the purpose of setting the balance channel can prevent the refrigerant oil from being retained in the shell cavity due to the poor fluid circulation, thereby affecting the operation effect of the driving component.

[0062] As an extension of the further technical solution, the nozzle component 700 also includes a positioning sleeve 720 and a clamping nut 730, and the positioning sleeve 720 and the clamping nut 730 are located in the nozzle cavity 740. The nozzle cavity 740 includes a step surface, and the positioning sleeve 720 is limited by the step surface. The side wall of the nozzle cavity 740 is provided with an internal thread, and the clamping nut 730 includes an external thread. The hexagonal hole 750 of the clamping nut 730 is rotated by an installation tool, so that the clamping nut 730 is fixedly connected to the nozzle 710 by threads. After installation, the clamping nut 730 axially abuts against the positioning sleeve 720 so that the positioning sleeve 720 is limited or fixed in the nozzle cavity 740.

[0063] The valve needle component 400 includes a valve needle 410, and the front end of the valve needle 410 is located in the nozzle cavity 740. The positioning sleeve 720 includes a positioning hole 721, and the valve needle 410 penetrates the positioning hole 721.

[0064] The above technical solution can ensure the position accuracy between the adjustment end of the valve needle 410 and the adjustment port of the nozzle chamber 740, thereby improving the adjustment accuracy of the injector 10.

[0065] As an extension of the further 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. 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 input gear 310 is rotationally connected or fixedly connected to the driving motor, and 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, the valve needle 410 includes an internal thread section, the screw 340 and the valve needle 410 are threadedly connected, and the screw 340 and the valve needle 410 are transmission-matched.

[0066] Figure 5 for Figure 1 Schematic diagram of the structure of the connection parts.

[0067] like Figure 5 Shown and combined Figure 1 and Figure 2. As an extension of the further technical solution, the connecting component 600 adopts a split structure. It includes a first connecting body 610, a second connecting body 620 and an installation kit 630. In this embodiment, the first connecting body 610 is roughly cylindrical and includes an external thread 614 at the outer edge. The second connecting body is roughly cylindrical and includes a accommodating cavity 623. The side wall of the accommodating cavity 623 is provided with an internal thread 624. The first connecting body 610 and the second connecting body 620 are fixedly connected by threads, and the installation kit 630 is sleeved on the first connecting body 610. Of course, the first connecting body 610 and the second connecting body 620 can also be fixedly connected by welding, or on the basis of the above-mentioned threaded fixed connection, they can be connected by welding, which can further improve the connection strength between the first connecting body 610 and the second connecting body 620.

[0068] The mounting kit 630 includes a central inner hole 615 and an inner cavity serving as a drive component mounting portion 613. The first connecting body 610 includes an outer step portion 611 on the side opposite to the second connecting body 620, serving as a first limiting portion 611. The second connecting body 620 includes an inner step portion 621, serving as a second limiting portion 621. The lower housing 510 includes a protruding ring 540 extending radially inward on the side facing the connecting component 600.

[0069] When the lower housing 510 and the connecting member 600 are assembled, the first connecting body 610 can be inserted into the lower housing 510 first, and then the first connecting body 610 and the second connecting body 620 are connected and fixed by threads. After the threads are tightened, along the axial direction of the housing 500, the first limiting portion 611 abuts against one side of the convex ring 540, and the second limiting portion 621 abuts against the other side of the convex ring 540, and the second connecting body 620 is connected and fixed to the body 110 by threads.

[0070] The above technical solution improves the installation connection strength between the shell and the main body component by providing the convex ring 540 and optimizing the installation connection method between the lower shell 510 and the connecting component 600.

[0071] After the first connector 610 and the second connector 620 are fixed, the bottom space of the accommodating cavity 623 is radially annular, serving as the transition cavity 623. 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 connector 610, and the second balancing channel 622 is located in the second connector 620. The first balancing channel 612 is connected to the second balancing channel 622 through the transition cavity 623.

[0072] The above technical solution, by setting a transition chamber 623 of the radial annular cavity, provides a large-capacity buffer transition space between the first balancing channel 612 and the second balancing channel 622, further improving the stability of pressure fluctuations of the fluid in the internal cavity of the injector when passing through the balancing channel 601.

[0073] As a further extension of the above technical solution, a bearing 830 is also included. 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 or transmission-connected to the input gear 310. The hole wall of the central inner hole 615 includes a step portion 616, and 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, so that the screw rod 340 is inserted into the central inner hole 615.

[0074] Figure 6 The figure is a schematic diagram of another structure of connecting parts provided by the present invention.

[0075] like Figure 6 Shown and combined Figure 1 and Figure 2 . Different from the above-mentioned technical solution, 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 the 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. This technology can also achieve the technical effect described in the present invention, and will not be repeated here.

[0076] Figure 7 The present invention provides a schematic diagram of the matching structure of a connecting component and a driving component.

[0077] As a further extended technical solution, the driving component 200A includes a stator 210 and a rotor 220, and the rotor 220 is connected to the transmission component 300 in a transmission connection or a fixed connection. If the maximum radial distance from the outer wall 221 of the rotor 220 to the axis V1 of the rotor 220 is defined as H1, and the minimum radial distance from the inner wall 602 of the balancing channel 601B to the axis V1 of the rotor 220 is defined as H2, then H1 is less than H2. With such a design, considering the state where the injector 10 is installed horizontally (such as Figure 1 Position), after the fluid medium enters the shell cavity 530A through the balance channel 601B, it will not directly contact the rotating rotor 220, reducing the impact of fluid turbulence disturbance in the cavity.

[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 shell, a body component and a nozzle component, wherein the body component comprises a body, the body has a body inner cavity, the nozzle component comprises a nozzle, the nozzle is at least partially located in the body inner cavity, the shell has a shell inner cavity, and is characterized in that: It also includes a connecting component, one side of which is fixedly connected to the main body, and the other side of which is fixedly connected to the shell. The connecting component includes a balancing channel, and the balancing channel connects the inner cavity of the shell and the inner cavity of the main body.

2. The injector according to claim 1, characterized in that It also includes a control component and a transmission component, the control component includes a driving component, a valve needle component and the shell, the driving component is at least partially located in the inner cavity of the shell, the valve needle component includes a valve needle, and the valve needle is at least partially located in the nozzle cavity of the nozzle, the driving component is in transmission connection with the transmission component, and the transmission component can drive the valve needle to move axially along the nozzle.

3. The injector according to claim 2, characterized in that The nozzle component also includes a positioning sleeve and a clamping nut. The positioning sleeve is at least partially located in the nozzle cavity. The positioning sleeve includes a positioning hole. The valve needle passes through the positioning hole. The clamping nut is threadedly connected to the nozzle, and the clamping nut axially abuts against the positioning sleeve.

4. The injector according to claim 2, characterized in that The transmission component includes an input gear, an output gear and a screw rod. The input gear is rotationally connected or fixedly connected to the driving component, the output gear is fixedly connected or limitably connected to the screw rod, and the screw rod is transmission-connected to the valve needle; the connecting component includes a central inner hole, and the screw rod is sleeved in the central inner hole.

5. The injector according to claim 4, characterized in that It also includes a bearing, the hole wall of 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.

6. The injector according to claim 4, characterized in that The connecting component includes a first connecting body, a second connecting body and an installation kit, the first connecting body is fixedly connected to the second connecting body, the first connecting body is sleeved with the installation kit, the installation kit includes a driving component mounting portion and the central inner hole, and the driving component is arranged on the driving component mounting portion.

7. The injector according to claim 2, characterized in that The driving component includes a rotor and a stator, and the rotor is drivingly connected or fixedly connected to the transmission component. The maximum radial distance from the outer wall of the rotor to the axis of the rotor is defined as H1, and the minimum radial distance from the inner wall of the balancing channel to the axis of the rotor is defined as H2, then: H1 is less than H2.

8. The injector according to any one of claims 1 to 7, 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, the first balancing flow channel is connected to the second balancing flow channel, the first balancing flow channel is located in the first connecting body, and the second balancing flow channel is located in the second connecting body.

9. The injector according to claim 8, characterized in that The balancing channel further includes a transition chamber, which is in a radial annular shape, and the first balancing flow channel is connected to the second balancing flow channel through the transition chamber.

10. The injector according to claim 9, characterized in that The first connector is threadedly connected to the second connector and fixed by welding; the first connector is welded to the shell, and the second connector is threadedly connected to the body.

11. The injector according to any one of claims 1 to 7, characterized in that: The number of the balancing channels is three, four or six and they are arranged at intervals along the circumference of the connecting component.

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