Inverter

Abstract

The utility model belongs to the technical field of power electronics, and discloses an inverter. The inverter comprises a shell, a first partition plate, a circuit control board and a power board. Wherein the first partition plate is arranged in the shell and divides the interior of the shell into a first cavity and a second cavity, and the first partition plate is a heat conducting plate. The circuit control board is arranged in the first cavity and connected to the side face, facing the first cavity, of the first partition plate, and the power board is arranged in the second cavity. Through reasonable layout of internal hardware of the inverter, a good heat dissipation effect can be ensured without increasing the size of the whole machine or an external battery, the inverter conforms to the development trend of miniaturization of the inverter, and meanwhile, the increase of the production cost is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to an inverter. Background Art

[0002] An inverter is a converter that converts DC power (battery, storage bottle) into constant frequency and voltage or frequency and voltage adjustable AC power (generally 220V, 50Hz sine wave).

[0003] In the prior art, the inverter includes a housing, a circuit board assembly, an inductor assembly, etc. The circuit board assembly is usually integrated with a power board, a control board, and a communication board, and is placed inside the housing. During the operation of the inverter, the internal electronic components will generate a large amount of heat. If this heat cannot be dissipated and controlled in time, it will have an adverse effect on the performance and service life of the inverter. However, the existing hardware layout method has a low heat dissipation efficiency, which easily leads to heat accumulation and affects the service life of internal components. In order to improve the heat dissipation effect, a common method is to realize the layout of the internal components of the inverter by increasing the size of the whole machine. However, increasing the size of the whole machine does not conform to the development trend of miniaturization of the inverter. Therefore, the above methods cannot take into account the characteristics of hardware layout and efficient heat dissipation.

[0004] Therefore, it is urgent to propose an inverter to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an inverter, the internal components of which are reasonably arranged and can take into account the requirements of miniaturization of the whole machine and efficient heat dissipation.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Inverter, including:

[0008] case;

[0009] A first partition plate is disposed inside the shell and divides the inside of the shell into a first chamber and a second chamber, and the first partition plate is a heat conducting plate;

[0010] A circuit control board is disposed in the first chamber, and the circuit control board is connected to the side of the first partition facing the first chamber;

[0011] The power board is arranged in the second chamber.

[0012] The inverter provided by the utility model supports and fixes the circuit control board by arranging a first partition inside the shell and connecting the circuit control board and the first partition. At the same time, the first partition separates the power board and the circuit control board to achieve a decentralized layout of the hardware. By rationally arranging the hardware inside the inverter, a good heat dissipation effect can be ensured without increasing the size of the whole machine, conforming to the development trend of miniaturization of the inverter, and avoiding an increase in production costs. The first partition is a heat-conducting plate with a strong heat-conducting effect, which is conducive to the heat transfer of the circuit control board to the first partition.

[0013] Optionally, the inverter further includes an airflow driving component, which is disposed in the second chamber and is used to drive airflow.

[0014] Optionally, the inverter also includes a second partition, which is connected to the side of the first partition facing the second chamber. In the second chamber, one side of the second partition forms a first airflow channel, and the other side of the second partition forms a second airflow channel. The power board includes a low-pressure side component and a high-pressure side component. The low-pressure side component is arranged in the first airflow channel, and the high-pressure side component is arranged in the second airflow channel. A connecting port is arranged at one end of the second partition, and the airflow driving component is arranged in the first airflow channel for driving the airflow from the first airflow channel to the second airflow channel through the connecting port.

[0015] Optionally, the airflow driving assembly includes a bracket and a fan, the bracket is fixedly connected to the shell, the bracket has a mounting slot, the fan is arranged in the mounting slot, and an air guide plate is arranged at the slot edge of the mounting slot.

[0016] Optionally, the inverter further includes an input port, a communication port, an output port, a battery input port and a switch component, and the input port, the communication port, the output port, the battery input port and the switch component are all connected to the power board to achieve signal transmission.

[0017] Optionally, the shell has a first side wall and a second side wall adjacent to the first side wall, the input port, the communication port, the output port and the battery input port are installed on the first side wall, and the input port, the communication port, the output port and the battery input port are arranged at intervals, and the switch assembly is installed on the second side wall.

[0018] Optionally, a mounting port is provided at the bottom of the shell, an inductor assembly is provided on the outer side of the bottom of the shell, the inductor assembly includes a shell and an inductor, the shell has a receiving groove, the inductor is arranged in the receiving groove, the shell and the edge of the mounting port are fixedly connected, the receiving groove and the mounting port are communicated, and the inductor is electrically connected to the power board.

[0019] Optionally, a plurality of wire harness fixings are arranged at intervals on the inner wall of the housing, and the wire harness fixings are used to fix the wire harness.

[0020] Optionally, the wire harness fixing member includes a mounting portion arranged inside the housing and a wire buckle connected to the top of the mounting portion, and the wire harness can be tied to the wire buckle by a cable tie.

[0021] Optionally, at least a portion of the edge of the first partition is provided with a connecting portion, and the connecting portion is sealedly connected to the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded diagram of the inverter provided by the utility model;

[0023] Figure 2 It is an assembly diagram of the first partition and the second partition provided by the utility model;

[0024] Figure 3 This is a partial structural diagram of the inverter provided by the utility model. Figure 1 ;

[0025] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0026] Figure 5 It is a structural schematic diagram of the fixing part provided by the utility model;

[0027] Figure 6 This is a partial structural diagram of the inverter provided by the utility model. Figure 2 ;

[0028] Figure 7 yes Figure 6 A magnified view of the local structure at B in the middle;

[0029] Figure 8 It is a structural schematic diagram of the bolt provided by the utility model.

[0030] In the figure:

[0031] 100, housing; 101, input port; 102, communication port; 103, output port; 104, battery input port; 105, switch assembly; 110, heat sink; 120, mounting portion; 130a, fixing portion; 131a, first avoidance; 132a, through hole; 133a, threaded connector; 130b, bolt; 131b, second avoidance; 131, first wire buckle; 132, second wire buckle; 1 33. Third wire tie; 134. Fourth wire tie; 140. Wire pressing guard plate; 141. Strip plate; 142. Connecting plate; 200. First partition plate; 210. Second partition plate; 220. Connecting part; 300. Circuit control board; 400. Power board; 410. High-voltage side assembly; 420. Low-voltage side assembly; 500. Airflow drive assembly; 510. Bracket; 511. Fixing hole; 512. Wind guide edge; 600. Inductor assembly. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0034] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0035] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0036] See also Figure 1 and Figure 2 This embodiment provides an inverter, including a housing 100, a first partition 200, a circuit control board 300 and a power board 400. The first partition 200 is arranged inside the housing 100, and divides the inside of the housing 100 into a first chamber and a second chamber, and the first partition 200 is a heat conducting plate. The circuit control board 300 is arranged in the first chamber, and the circuit control board 300 is connected to the side of the first partition 200 facing the first chamber, and the power board 400 is arranged in the second chamber.

[0037] The inverter is provided with a first partition 200 inside the housing 100. By connecting the circuit control board 300 and the first partition 200, the circuit control board 300 is supported and fixed. At the same time, the first partition 200 separates the power board 400 and the circuit control board 300 to achieve a decentralized layout of the hardware. By reasonably arranging the hardware inside the inverter, a good heat dissipation effect can be ensured without increasing the size of the whole machine, conforming to the development trend of miniaturization of the inverter, and avoiding an increase in production costs. The first partition 200 is a heat-conducting plate with a strong heat-conducting effect, which is conducive to the heat transfer of the circuit control board 300 to the first partition 200.

[0038] Optionally, the circuit control board 300 and the first partition board 200 are connected by screws. Exemplarily, the circuit control board 300 is provided with a mounting hole for allowing the screw to pass through, the first partition board 200 is provided with a connecting column, and the connecting column is provided with a threaded hole, and the screw passes through the mounting hole and the threaded hole in sequence to fix the circuit control board 300 and the first partition board 200.

[0039] Optionally, the first partition 200 is a metal plate with high thermal conductivity. In addition, the first partition 200 is a metal plate, which can suppress electromagnetic interference and improve the working efficiency and stability of the inverter. Optionally, the material of the first partition 200 can be copper, iron or aluminum. In this embodiment, the first partition 200 is preferably an aluminum plate, which has the advantages of light weight, low cost, high thermal conductivity, etc.

[0040] Optionally, the housing 100 includes an upper cover and a lower housing, and the upper cover is disposed on the lower housing. The circuit control board 300 is located above the first partition 200, and the power board 400 is located below the first partition 200, and the circuit control board 300 and the power board 400 are electrically connected. Optionally, a heat dissipation fin 110 is disposed at the bottom of the housing 100, and the heat dissipation fin 110 is in the form of a thin sheet, which can increase the heat dissipation area, improve the heat exchange efficiency, ensure that the device operates at a normal temperature, and ensure the normal service life and stability of the device.

[0041] In some embodiments, the inverter can be a photovoltaic inverter, in which the power panel 400 is the high-voltage part, integrating the circuits of the photovoltaic side, the battery side, and the off-grid side, and the circuit control panel 300 is the low-voltage part, integrating the auxiliary power supply, the control unit, and the communication function.

[0042] Further, see Figures 1 to 3 The inverter further includes an airflow driving component 500, which is disposed in the second chamber and is used to drive the airflow to flow. By driving the airflow to flow, the heat dissipation effect can be improved, the heat of each part inside the second chamber can be balanced, and the existence of heat dissipation dead corners can be avoided.

[0043] Further, the inverter also includes a second partition 210, the second partition 210 is connected to the side of the first partition 200 facing the second chamber, in the second chamber, one side of the second partition 210 forms a first airflow channel, and the other side of the second partition 210 forms a second airflow channel, the power board 400 includes a low-pressure side component 420 and a high-pressure side component 410, the low-pressure side component 420 is arranged in the first airflow channel, the high-pressure side component 410 is arranged in the second airflow channel, one end of the second partition 210 is provided with a connecting port, and the airflow drive component 500 is arranged in the first airflow channel, and the airflow drive component 500 is used to drive the airflow from the first airflow channel to the second airflow channel through the connecting port. It can be understood that the airflow drive component 500 is arranged at one end of the second partition 210 away from the connecting port, and the second partition 210 guides the airflow, and the airflow flows from the first airflow channel to the second airflow channel and circulates inside the second chamber, so that the heat distribution in the second chamber is more uniform, which is conducive to rapid stabilization.

[0044] Wherein, under the action of the airflow driving component 500, the airflow first flows through the various components in the first airflow channel, then flows through the various components in the second airflow channel, and then flows out of the housing. The airflow driving component 500 can be a fan or an induced draft fan, etc. The airflow driving component 500 can be arranged in the first airflow channel, and drive the airflow from the first airflow channel to the second airflow channel by blowing action. The airflow driving component 500 can also be arranged in the second airflow channel, and drive the airflow from the first airflow channel to the second airflow channel by suction action.

[0045] Furthermore, the low-voltage side component 420 is mainly used for outputting and regulating electric energy, and the high-voltage side component 410 is mainly used for converting and adjusting DC voltage. Taking the inverter of this embodiment as a photovoltaic inverter as an example, the low-voltage side component 420 includes an energy storage battery, the high-voltage side component 410 includes a photovoltaic capacitor, and the bus capacitor is arranged at the connecting port. The airflow driving component 500 can drive the airflow to pass through the energy storage battery, the bus capacitor and the photovoltaic capacitor in sequence.

[0046] In some embodiments, the airflow drive assembly 500 includes a bracket 510 and a fan, the bracket 510 is fixedly connected to the housing 100, the bracket 510 has a mounting slot, the fan is arranged in the mounting slot, and a wind guide edge 512 is arranged at the edge of the slot of the mounting slot. Optionally, the bracket 510 is fixed to the lower shell by welding or by a connector. The air outlet surface of the fan is tilted toward the direction of the energy storage battery, effectively reducing the heat concentration at the energy storage battery. The wind guide edge 512 guides the airflow, effectively increases the airflow velocity, and improves the heat dissipation efficiency. Optionally, the air guide plate is annular and arranged circumferentially along the slot of the mounting slot.

[0047] Furthermore, the inverter also includes an input port 101, a communication port 102, an output port 103, a battery input port 104 and a switch component 105. The input port 101, the communication port 102, the output port 103, the battery input port 104 and the switch component 105 are all connected to the power board 400 to achieve signal transmission.

[0048] The shell 100 has a first side wall and a second side wall adjacent to the first side wall. The input port 101, the communication port 102, the output port 103 and the battery input port 104 are installed on the first side wall, and the input port 101, the communication port 102, the output port 103 and the battery input port 104 are arranged at intervals. The switch assembly 105 is installed on the second side wall.

[0049] Optionally, the input port 101 is a photovoltaic input port, and the output port 103 includes an off-grid output port and a grid-connected output port. The photovoltaic input port is usually used to connect a solar panel to transmit the DC power collected by the power converter to the inverter, and the output port is used to transmit the converted AC power to the power grid. The communication port 102 is a key interface for the inverter to transmit and control data with other devices, the battery input port 104 is used to connect the battery, and the switch component 105 is used to control the on and off of the circuit.

[0050] The input port 101, the communication port 102, the output port 103, the battery input port 104 and the switch assembly 105 are dispersedly arranged to avoid heat concentration. In one embodiment, for the photovoltaic side, the current passes through the input port 101, the switch assembly 105, the power board 400 and the output port 103 in sequence; for the battery side, the current passes through the battery input port 104, the power board 400 and the output port 103 in sequence.

[0051] Optionally, continue to see Figures 1 to 3 , at least part of the edge of the first partition 200 is provided with a connecting portion 220, and the connecting portion 220 is sealed and connected to the shell 100. The sealing connection between the connecting portion 220 and the shell 100 can suppress electromagnetic interference. In some embodiments, in order to avoid interference between the wiring harness led out from the input port 101 and the circuit control board 300, the connecting portion 220 is arranged close to the input port 101. Optionally, the connecting portion 220 is two vertically connected plate-like structures, which are arranged at the corners of the first partition 200, and the two plate-like structures are respectively connected to the first side wall and the second side wall. Optionally, the connection method of the connecting portion 220 and the shell 100 can be welding, which is simple to operate and has high connection strength.

[0052] Optionally, the bottom of the housing 100 is provided with a mounting port, and the outer side of the bottom of the housing 100 is provided with an inductor assembly 600, the inductor assembly 600 includes a housing and an inductor, the housing has a receiving slot, the inductor is arranged in the receiving slot, the edge of the housing and the mounting port is fixedly connected, the receiving slot and the mounting port are connected, and the inductor is electrically connected to the power board 400. Optionally, the inductor assembly 600 is centrally arranged at the bottom of the lower shell. Optionally, at least one wire pressing guard plate 140 is provided at the mounting port, and the wire pressing guard plate 140 is used to press the wire harness led out of the inductor assembly 600 to avoid confusion of the wire harness. In the present embodiment, the wire pressing guard plate 140 includes two parallel strip plates 141, the strip plates 141 extend along the width direction of the mounting port, and the two ends of the strip plates 141 are respectively connected to the housing 100 through the connecting plate 142, and optionally, the connecting plate 142 and the housing 100 are welded or connected through a connector.

[0053] Furthermore, a plurality of harness fixing members are provided at intervals on the inner wall of the housing 100, and the harness fixing members are used to fix the harness. By fixing the harness inside the housing with the harness fixing members, the harness can be prevented from being tangled.

[0054] Further, the harness fixing member includes a mounting portion 120 disposed inside the housing 100 and a wire buckle connected to the top of the mounting portion 120, and the harness can be tied to the wire buckle by a cable tie. Exemplarily, in this embodiment, the wire buckle includes a first wire buckle 131, a second wire buckle 132, a third wire buckle 133 and a fourth wire buckle 134.

[0055] See also Figure 2 and Figure 3 The first wire buckle 131 is arranged on the inner side of the first side wall, and the first wire buckle 131 is used to fix the wire harness led out of the output port 103. Optionally, the airflow driving assembly 500 is arranged close to the first side wall, and the bracket 510 is provided with a fixing hole 511 for fixing the wire harness, and the wire harness led out of the output port 103 passes through the fixing hole 511 and the first wire buckle 131 in sequence and is fixed.

[0056] Further, the second wire buckle 132 and the third wire buckle 133 are arranged on the inner side of the second side wall, and the second wire buckle 132 and the third wire buckle 133 are respectively located on both sides of the switch assembly 105, and the second wire buckle 132 is located on the side close to the second side wall, and the second wire buckle 132 is used to fix the wire harness led out of the communication port 102, and the third wire buckle 133 is used to fix the wire harness led out of the switch assembly 105. Since the switch assembly 105 occupies the space of the housing 100 close to the second side wall, the second wire buckle 132 and the third wire buckle 133 are arranged on the inner side of the second side wall, so that this part of the space can be fully utilized for reasonable layout.

[0057] Furthermore, the shell 100 also has a third side wall opposite to the first side wall, the third side wall is connected to the second side wall, and at least one fourth wire clip 134 is arranged on the inner side of the third side wall. The shell 100 is connected to the inductor assembly 600, and the fourth wire clip 134 is used to fix the wiring harness led out of the inductor assembly 600.

[0058] In this embodiment, two fourth wire clips 134 are provided, and the two fourth wire clips 134 are respectively located on both sides of the length direction of the installation opening. In other embodiments, the number of fourth wire clips 134 can be one, three, or four, as long as the wire harness led out of the inductor assembly 600 can be fixed.

[0059] Furthermore, a magnetic ring is provided on the wiring harness and fixed on the wire buckle. The magnetic ring is used to suppress or filter out high-frequency noise and electromagnetic interference signals in the circuit, thereby improving the working efficiency and stability of the inverter.

[0060] See also Figure 3 , Figure 4 and Figure 5 In one embodiment, the wire buckle includes a fixing portion 130a and a threaded connector 133a. The fixing portion 130a is provided with a first avoidance opening 131a for allowing a cable tie to pass through, and the cable tie is used to bind the magnetic ring and the wiring harness to the wire buckle. A threaded hole is provided at the top of the mounting portion 120, and a through hole 132a is provided on the wire buckle. The threaded connector 133a passes through the through hole 132a and is fixedly connected to the threaded hole, thereby fixing the wire buckle and the mounting portion 120. Of course, the fixing portion 130a can also be fixedly connected to the top of the mounting portion 120 by welding or bonding.

[0061] See also Figure 6 , Figure 7 and Figure 8 In another embodiment, the wire clip is a bolt 130b, and the head of the bolt 130b is provided with a second avoidance opening 131b allowing a cable tie to pass through. The cable tie is used to bind the magnetic ring and the wiring harness to the bolt 130b, and the bolt 130b is threadedly connected to the mounting portion 120.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An inverter, characterized in that: include: Housing (100); A first partition plate (200) is disposed inside the shell (100) and divides the inside of the shell (100) into a first chamber and a second chamber, and the first partition plate (200) is a heat conduction plate; A circuit control board (300) is disposed in the first chamber, and the circuit control board (300) is connected to the side of the first partition (200) facing the first chamber; A power board (400) is disposed in the second chamber.

2. The inverter according to claim 1, characterized in that: The inverter further comprises an airflow driving component (500), wherein the airflow driving component (500) is arranged in the second chamber, and the airflow driving component (500) is used to drive the airflow to flow.

3. The inverter according to claim 2, characterized in that: The inverter also includes a second partition (210), the second partition (210) is connected to the side of the first partition (200) facing the second chamber, in the second chamber, one side of the second partition (210) forms a first airflow channel, and the other side of the second partition (210) forms a second airflow channel, the power board (400) includes a low-pressure side component (420) and a high-pressure side component (410), the low-pressure side component (420) is arranged in the first airflow channel, the high-pressure side component (410) is arranged in the second airflow channel, one end of the second partition (210) is provided with a connecting port, and the airflow driving component (500) is arranged in the first airflow channel for driving the airflow from the first airflow channel to the second airflow channel through the connecting port.

4. The inverter according to claim 3, characterized in that: The airflow driving assembly (500) comprises a bracket (510) and a fan, wherein the bracket (510) is fixedly connected to the housing (100), the bracket (510) has a mounting groove, the fan is arranged in the mounting groove, and an air guide plate is arranged at the groove edge of the mounting groove.

5. The inverter according to any one of claims 1 to 4, characterized in that: The inverter further comprises an input port (101), a communication port (102), an output port (103), a battery input port (104) and a switch component (105); the input port (101), the communication port (102), the output port (103), the battery input port (104) and the switch component (105) are all connected to the power board (400) to achieve signal transmission.

6. The inverter according to claim 5, characterized in that: The housing (100) comprises a first side wall and a second side wall adjacent to the first side wall; the input port (101), the communication port (102), the output port (103) and the battery input port (104) are installed on the first side wall, and the input port (101), the communication port (102), the output port (103) and the battery input port (104) are arranged at intervals; and the switch assembly (105) is installed on the second side wall.

7. The inverter according to claim 1, characterized in that: The bottom of the shell (100) is provided with a mounting opening, the outer side of the bottom of the shell (100) is provided with an inductor assembly (600), the inductor assembly (600) comprises a shell and an inductor, the shell has a receiving groove, the inductor is arranged in the receiving groove, the shell and the edge of the mounting opening are fixedly connected, the receiving groove and the mounting opening are communicated, and the inductor is electrically connected to the power board (400).

8. The inverter according to claim 1, characterized in that: A plurality of wire harness fixing members are arranged at intervals on the inner wall of the housing (100), and the wire harness fixing members are used to fix the wire harness.

9. The inverter according to claim 8, characterized in that: The wire harness fixing member comprises a mounting portion (120) arranged inside the housing (100) and a wire buckle connected to the top of the mounting portion (120), and the wire harness can be tied to the wire buckle by a cable tie.

10. The inverter according to claim 1, characterized in that: At least part of the edge of the first partition plate (200) is provided with a connecting portion (220), and the connecting portion (220) is sealedly connected to the shell (100).

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