inverter

Abstract

An inverter and a DC switch unit, the DC switch unit including a DC switch and a connecting terminal means, both of which are integrated in an installation body, the connecting terminal means being capable of realizing communication and cut-off between a first terminal and a second terminal by a DC switch, the DC switch being directly connected to a DC cable by the first terminal, in this invention the DC switch is mounted so as to be integrated in the connecting terminal means, no cable connection is required, removing and installing efficiency is improved, and the number of electrical parts and components inside the housing is correspondingly reduced, thereby saving the installation space inside the housing.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on November 1, 2021, bearing application number 202111283934.7 and titled "Inverter and DC Switch Unit," the entire contents of which are incorporated herein by reference.

[0002] [Technical field] The present invention relates to the technical field of electrical equipment, in particular to inverters and DC switch units. [Background technology]

[0003] Currently, electrical enclosures such as inverters and combiner boxes generally include components such as an enclosure, connection terminals, current sensing boards, DC switches, and printed circuit boards, which are installed inside the enclosure. The connection terminals are generally attached to the side walls of the enclosure, providing electrical connections between the electrical components inside the enclosure and the circuits outside the enclosure. The connection terminals are electrically connected to the current sensing board via a cable, and the current sensing board is connected to one side of the DC switch via a cable, and the other side of the DC switch is connected to the printed circuit board via a cable. The current sensing board detects the current value in the connecting cable, and the DC switch controls the connection and disconnection of the cable. Summary of the Invention [Problem to be solved by the invention]

[0004] As can be seen from the above description, the conventional electrical enclosure contains many electrical components, and the components are connected by cables, resulting in a large number of cables and low attachment / detachment efficiency.

[0005] The present invention provides a DC switch unit and an inverter with high connection / disconnection efficiency. [Means for solving the problem]

[0006] The present invention provides a DC switch unit, which includes a mounting body, and a DC switch and at least one connecting terminal means integrated in the mounting body, the connecting terminal means including a first terminal electrically connected directly to a DC cable and a second terminal electrically connected to a circuit inside a housing, wherein when the switch is in a first position, the first terminal and the second terminal of the connecting terminal means are in a conductive state, and when the switch is in a second position, the first terminal and the second terminal of the connecting terminal means are in a disconnected state.

[0007] The DC switch unit of the present invention includes a DC switch and a connecting terminal means, both of which are integrated into the mounting body. The connecting terminal means can realize communication and disconnection between the first terminal and the second terminal by means of a switch. The DC switch is mounted to be integrated into the connecting terminal means and is directly connected to the DC cable by means of the first terminal. This eliminates the need for a cable connection between the DC switch and the connecting terminal means, improving the efficiency of removal and installation. In addition, the number of electrical parts and components inside the housing is correspondingly reduced, thereby saving the installation space inside the housing.

[0008] Preferably, the mounting body has a through hole, the DC switch includes an operating end and a rotating shaft, the operating end can be driven to rotate the rotating shaft, the operating end is located outside the through hole, and the rotating shaft is located inside the through hole, and when the rotating shaft is rotated to a first position, the first terminal and the second terminal of each of the connection terminal means are brought into a conductive state by the rotating shaft, and when the rotating shaft is rotated to a second position, the first terminal and the second terminal of each of the connection terminal means are brought into a disconnected state.

[0009] Preferably, the rotating shaft includes an insulating body, conductive portions are attached to the insulating body, and the conductive portions correspond to the connecting terminal means respectively, and when the rotating shaft is in a first position, the first terminal and the second terminal of each of the connecting terminal means simultaneously contact the corresponding conductive portion, and when the rotating shaft is in a second position, the first terminal and the second terminal of each of the connecting terminal means contact the non-conductive portion of the insulating body.

[0010] Preferably, along the axial direction, the number of said connection terminal means is adjustable.

[0011] Preferably, the operation end and the rotation shaft are arranged coaxially, Alternatively, the operating end and the rotary shaft are arranged perpendicular to each other and are connected by a transmission mechanism, which includes one of a bevel gear transmission mechanism and a joint transmission mechanism.

[0012] Preferably, the mounting portion further includes a mounting portion fixedly connected to the mounting body, the mounting portion having a through hole, at least a portion of the first terminal being located in the through hole, and the shaft segment of the mounting portion extending from the mounting body further has a locking structure for being locked and fixed to the housing wall in a sealed manner.

[0013] Preferably, the locking structure includes a screw structure or a buckle structure, and the mounting portion is locked to the housing wall by the nut or the buckle so as to be sealed.

[0014] Preferably, the device further includes a sheath attached to the exterior of the shaft segment, the sheath being circumferentially attached to the through hole so as to be sealed therewith.

[0015] Preferably, the mounting body includes at least two body means, each of which includes at least one connection terminal means, adjacent body means being removably engaged with each other for assembly, and each of the body means having a coaxial through-hole that engages with the pivot shaft.

[0016] Preferably, each of the first terminals and each of the second terminals are located on opposite sides of the mounting body, and adjacent first terminals and adjacent second terminals are arranged offset along the axial direction, or all of the first terminals are arranged in at least one row along the axial direction.

[0017] Preferably, the mounting body has integrated therein detection means for detecting at least one of the temperature, current or voltage signal of the connection terminal means.

[0018] The present invention also provides an inverter including a housing and a printed circuit board, and further including any one of the DC switch units described above, wherein the housing has a through hole, so that the first terminal is directly connected to a DC cable outside the housing, and the second terminal is electrically connected to the printed circuit board.

[0019] The present invention also provides an inverter including a housing and a printed circuit board, and further including any one of the DC switch units described above, wherein the mounting body is located in a cavity of the housing, and a housing wall of the housing has a through-hole through which an axial segment of the mounting part extends from the cavity, and the axial segment and the housing wall are locked together by the locking structure so as to be hermetically sealed.

[0020] Since the inverter in the present invention includes the above DC switch unit, it also includes the above technical effects of the DC switch unit. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a structural schematic diagram of an inverter according to an embodiment of the present invention; [Figure 2] FIG. 2 is a side view of an inverter according to one embodiment of the present invention. [Figure 3] 1 is a cross-sectional view of an inverter according to one embodiment of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of an inverter according to an embodiment of the present invention in another direction. [Figure 5] 1 is a schematic perspective view of a DC switch unit according to an embodiment of the present invention; [Figure 6] FIG. 6 is a plan view of the DC switch unit of FIG. 5. [Figure 7] FIG. 6 is a front view of the DC switch unit of FIG. 5. [Figure 8] 1 is a cross-sectional view of a DC switch unit according to one embodiment of the present invention. [Figure 9]FIG. 1 is a front view of a DC switch unit according to a first embodiment of the present invention. [Figure 10] FIG. 10 is a front view of a DC switch unit according to a second embodiment of the present invention. [Figure 11] 1 is a structural schematic diagram of a DC switch according to an embodiment of the present invention; [Figure 12] FIG. 12 is a cross-sectional view of the DC switch of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, the terms "first," "second," etc., do not indicate or imply the relative importance or the number of the indicated technical features, but are merely for descriptive purposes, and the features qualified by "first," "second," etc., may explicitly or implicitly include one or more of the features.

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in combination with drawings and specific examples.

[0024] 1 to 10, the inverter provided by the present invention includes a housing 100 and a DC switch unit 200, and the housing 100 has mounting chambers for mounting each electronic component and providing protection for each electronic component.

[0025] The DC switch unit 200 provided by the present invention includes a mounting body 1, which is an insulator and provides a mounting base for other components. The specific structure of the mounting body 1 can be determined according to the structure of the applicable electrical enclosure, and the specific structure of the mounting body 1 can be determined as long as it meets the usage needs, and this specification does not specifically limit it.

[0026] The mounting body 1 of the present invention is located in the mounting chamber of the housing 100 and is fixed to the housing wall of the housing 100. The mounting body 1 integrates a DC switch 3 and at least one connecting terminal means 2. The connecting terminal means 2 includes a first terminal 21 and a second terminal 22 for electrical connection to circuits external and internal to the housing 100, respectively. That is, one connecting terminal means 2 has two connecting terminals (the first terminal 21 and the second terminal 22). The first terminal 21 is directly connected to a DC cable. Typically, the first terminal 21 is connected to a DC connecting wire located outside the housing 100, and the second terminal 22 is electrically connected to a circuit internal to the housing 100. Some of the first terminals 21 are positive connecting terminals, and others are negative connecting terminals. Generally, the number of positive connecting terminals and the number of negative connecting terminals are the same, although the numbers may differ. Similarly, the number and polarity of the second terminals 22 are the same as those of the first terminals 21 and are not specifically described here.

[0027] It should be noted that the circuits described herein are not limited to cable circuits, but may be other forms by which electrical connections can be achieved, such as insertion connections or electromagnetic connections.

[0028] In the DC switch unit 200 of the present invention, when the DC switch 3 is in the first position, the first terminal 21 and the second terminal 22 of the connection terminal means 2 are in a conductive state, and when the DC switch 3 is in the second position, the first terminal 21 and the second terminal 22 of the connection terminal means 2 are in a cut-off state.

[0029] In the background art, the connection terminal inside the housing 100 is connected to the DC switch by a cable, whereas the DC switch unit 200 of the present invention includes a DC switch 3 and a connection terminal means 2, both of which are integrated into the mounting body 1. The first terminal 21 and the second terminal 22 of the connection terminal means 2 are connected and disconnected by the DC switch 3, and the first terminal 21 is directly connected to the DC cable, thereby eliminating the need for a cable connection between the DC switch 3, the first terminal 21, and the second terminal 22, improving the efficiency of removal and installation, and correspondingly reducing the number of electrical parts and components inside the housing 100, thereby saving the installation space inside the housing 100.

[0030] The DC switch 3 of the present invention can be placed in the first position or the second position manually, or can be electrically driven or remotely controlled, etc. The following description of the present invention will show specific embodiments of the DC switch 3, and reference can be made to the following description in detail.

[0031] 11 and 12 , in one specific embodiment, the mounting body 1 has a through-hole, and the DC switch 3 includes an operating element 32 and a rotating shaft 31, and the operating element 32 can drive the rotating shaft 3 to rotate. The operating element 32 is directly and fixedly connected to the rotating shaft 31, or of course, the two can be connected by a transmission mechanism, and the operating element 32 indirectly drives the rotating shaft 31 to rotate. The operating element 32 is located outside the through-hole, and the rotating shaft 31 is located inside the through-hole. The operator can rotate the operating element 32 to rotate the rotating shaft 31, and the operating element 32 is an insulator to ensure the safety of the operator. When the rotating shaft 31 is rotated to the first position, the first terminal 21 and the second terminal 22 of each connection terminal means 2 are brought into a conductive state by the rotating shaft 31, and when the rotating shaft 31 is rotated to the second position, the first terminal 21 and the second terminal 22 of each connection terminal means 2 are not conductive. As can be seen from the above description, at least a portion of the rotating shaft 31 that connects the first terminal 21 and the second terminal 22 is a conductor, and when the rotating shaft 31 is in the second position, the conductor on the rotating shaft 31 is separated from the first terminal 21 and / or the second terminal 22.

[0032] When the connection unit of the present invention is attached to the housing 100, the attachment body 1 is fixed to the inside of the housing wall of the housing 100, the second terminal 22 is located inside the housing 100, and at least a part of the operating end 32 and the first terminal 21 is located outside the housing 100, so that by an operator rotating the operating end 32, the rotating shaft 31 can be rotated back and forth between the first position and the second position, and electrical connection and disconnection can be achieved between the first terminal 21 in each connection terminal means 2 and the corresponding second terminal 22, and the structure of this embodiment is simple.

[0033] 11 and 12 , in this embodiment, the rotating shaft 31 includes an insulating body 311, on which conductor portions 312 are attached, and the conductor portions 312 correspond to the connecting terminal means 2, respectively. When the rotating shaft 31 is in a first position, the first terminal 21 and the second terminal 22 of each connecting terminal means 2 simultaneously contact the corresponding conductor portion 312, and when the rotating shaft 31 is in a second position, the first terminal 21 and the second terminal 22 of each connecting terminal means 2 contact the insulating body 311. In conjunction with FIG. 5 , the drawings show a specific embodiment having eight connecting terminal means 2, of which four first terminals 21 are positive connecting ends and four negative connecting ends, as well as the second terminals 22. Correspondingly, the rotating shaft 31 also has eight conductor portions corresponding to the eight connecting terminal means 2, respectively. When the rotary shaft 31 is rotated to the first position, the eight connection terminal means 2 realize electrical continuity between the first terminal 21 and the second terminal 22 by the eight conductor portions, respectively.

[0034] In this embodiment, the conductor portion 312 is attached by being fitted into the insulating body 311, which not only provides an attachment base for the conductor portion but also serves as a component for blocking electrical conduction between the first terminal 21 and the second terminal 22. The insulating body forms all of the conductor portions as a complete whole, which simplifies the molding process and provides high rotational stability.

[0035] As an example, the number of connecting terminal means 2 can be adjusted along the axial direction. For example, the rotating shaft 31 includes at least two shaft segments 3-1 along the axial direction, and adjacent shaft segments 3-1 are detachably connected, and each shaft segment 3-1 is provided with at least one conductor portion 312 for conducting between the first terminal 21 and the second terminal 22 of the corresponding connecting terminal means 2.

[0036] 11 shows an embodiment in which the shaft segments on both sides have different structures from the three intermediate shaft segments. The adjacent shaft segments 3-1 may be connected by threads, or may use a concave-convex engagement or position limiting connection method. The shaft segment closest to the operating element 32 may be connected to the operating element 32 by threads or other methods.

[0037] Of course, the rotation shaft 31 may be of an integral structure.

[0038] In this embodiment, the operating element 32 and the rotating shaft 31 of the DC switch unit 200 are arranged coaxially, so that no other transmission mechanism is required between the operating element 32 and the rotating shaft 31, and they can be directly fixed and connected, resulting in a simple structure.

[0039] Of course, to suit the installation needs of different electrical enclosures, the operating end 32 and the rotating shaft 31 may be arranged vertically, and the two may be connected by a transmission mechanism, which may include one of a bevel gear transmission mechanism or a joint transmission mechanism. The operating end 32 and the rotating shaft 31 are connected by a transmission mechanism, which can adapt to different application environments and improve the application flexibility of the DC switch unit 200.

[0040] In this embodiment, the DC switch unit 200 further includes a mounting part 4 fixedly connected to the mounting body 1, the mounting part 4 having a through-hole, at least a portion of the first terminal 21 being located in the through-hole, and a shaft segment of the mounting part 4 protruding from the mounting body 1 further having a locking structure for being locked and fixed in a sealed manner to the housing wall. The shaft segment of the mounting part 4 protruding from the mounting body 1 provides a mounting base for the locking structure. The mounting part 4 and the mounting body 1 may be integrally molded or may be separate structures. After the mounting part 4 and the mounting body 1 are molded respectively, the mounting part 4 is assembled to the mounting body 1, for example, by welding or screwing to the mounting body 1. In an embodiment in which the mounting part 4 and the mounting body 1 are separate structures, the mounting body 1 is further provided with a sealing ring 1a sealed to the mounting part 4.

[0041] The locking structure in the above embodiment includes a screw structure or a buckle structure, and the mounting part 4 is locked to the housing wall by a nut or a buckle. For example, the shaft segment of the mounting part 4 is provided with a male thread, which penetrates the housing wall and then engages with a nut to tighten, thereby further realizing the fixing of the mounting body 1 and the housing 100.

[0042] A sheath 5 is further attached inside the through hole of the mounting portion 4, and the sheath 5 is attached so as to seal the through hole in the circumferential direction, thereby providing a circumferential sealing effect for the cable 7 connected to the first terminal 21 and also providing a protective effect for the connection segment between the cable 7 and the first terminal 21. The drawings show a specific embodiment in which the cable 7 is connected to the first terminal 21 by a connection pin 6. A sealing ring 8 is further provided at the opening position of the through hole to improve sealing performance.

[0043] As an example, the mounting body 1 of the DC switch unit 200 includes at least two body means 11, each of which includes at least one connecting terminal means 2, and adjacent body means 11 are detachably engaged and assembled, and each body means 11 has a coaxial through-hole that engages with the rotating shaft 31. This allows the number of body means 11 to be increased appropriately according to the actual needs of the electrical enclosure, greatly improving the flexibility of use of the DC switch unit 200. When a terminal of a certain connecting terminal means 2 does not function normally, it is not necessary to replace the entire DC switch unit 200, but only the connecting terminal means 2 needs to be replaced, thereby greatly reducing maintenance costs.

[0044] As one example, the first terminals 21 and second terminals 22 of the DC switch unit 200 are located on opposite sides of the mounting body 1, and in this arrangement, the first terminals 21 are located on one side, and correspondingly, an engagement structure for the first terminals 21 to pass through needs to be arranged on only one side wall of the housing 100, which simplifies the structure of the housing 100. Adjacent first terminals 21 and adjacent second terminals 22 are arranged offset along the axial direction, which provides a large operating space between the adjacent terminals.

[0045] As another example, all of the first terminals 21 may be arranged in one or several rows along the axial direction. The drawing shows all of the first terminals 21 arranged in two rows, one above the other, along the axial direction, with one row being a positive electrode connection terminal and the other being a negative electrode connection terminal. In this way, the positive and negative electrodes are located in different rows, preventing incorrect wiring. Of course, the positive and negative electrode connection terminals may be located in the same row. To facilitate subsequent wiring, the positive and negative electrodes are clearly marked on the outer wall of the housing 100.

[0046] In each of the above embodiments, the mounting body 1 further integrates a detection means for detecting at least one of the temperature, current, or voltage signal of the connection terminal means 2. The detection means may be mounted at an appropriate position relative to the detection means, for example, at position A adjacent to the first terminal or at position C adjacent to the second terminal, or may be located entirely inside the mounting body 1; position B in Fig. 8 is merely a schematic representation.

[0047] In this embodiment, the DC switch unit 200 further includes a detection means integrated therein, which improves the integration density of electrical elements.

[0048] The present invention further provides an electrical housing, which includes a housing 100, a printed circuit board 300 and a DC switch unit 200, wherein the housing 100 has a through hole, so that the first terminal 21 is electrically connected to an external circuit and the second terminal 22 is electrically connected to the printed circuit board 300.

[0049] Other structures of the electrical enclosure can be found in the prior art and will not be described in detail in this specification.

[0050] The electrical housing of the present invention includes the DC switch unit 200, and therefore also includes the above technical effects of the DC switch unit 200.

[0051] The above is a detailed introduction to the electrical enclosure and DC switch unit provided by the present invention. Specific examples are used in this specification to describe the principles and embodiments of the present invention, and the description of the above examples is merely for understanding the method and spirit of the present invention. Those skilled in the art may make some improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. [Explanation of symbols]

[0052] 100 ···Enclosure; 200 ··· DC switch unit; 1. Mounting body; 1a ···Sealing ring; 11 ···Main body means; 2 ··· connection terminal means; 21...1st terminal; 22...2nd terminal; 3 ··· DC switch; 31 ···Pivot axis; 3-1 ··· axial segment; 311 ···Insulating body; 312 ···Conductor section; 32...operating end; 4 ···Mounting part; 5 ···Sheath; 6 ··· connection pins; 7 ··· cable; 8 ··· sealing ring; 9 ···nut; 300 ···Printed circuit board.

Claims

1. An inverter including a housing and a printed circuit board, further including a DC switch unit, the DC switch unit including a mounting body, the mounting body integrating a DC switch and at least one connection terminal means, the connection terminal means including a first terminal and a second terminal; the mounting body is located in the cavity of the housing, and the housing of the inverter is further provided with a first through-hole, so that the first terminal is directly connected to a DC cable outside the housing through the first through-hole, and the second terminal is electrically connected to the printed circuit board; the mounting portion further includes a mounting portion fixedly connected to the mounting body, the mounting portion having a second through-hole, at least a portion of the first terminal being located in the second through-hole, and a shaft segment of the mounting portion extending from the mounting body further includes a locking structure for being locked and fixed to a housing wall in a sealing manner; When the DC switch is in a first position, the first terminal and the second terminal of the connection terminal means are in a conductive state, and when the DC switch is in a second position, the first terminal and the second terminal of the connection terminal means are in a cut-off state.

2. 2. The inverter according to claim 1, wherein the mounting body has a third through hole, the DC switch includes an operating element and a rotating shaft, the operating element is drivable to rotate the rotating shaft, the operating element is located outside the third through hole, and the rotating shaft is located inside the third through hole, and when the rotating shaft is rotated to a first position, the first terminal and the second terminal of each of the connection terminal means are brought into a conductive state by the rotating shaft, and when the rotating shaft is rotated to a second position, the first terminal and the second terminal of each of the connection terminal means are brought into a disconnected state.

3. 3. The inverter according to claim 2, wherein the rotating shaft includes an insulating body, conductor portions are attached to the insulating body, the conductor portions correspond to the connecting terminal means respectively, and when the rotating shaft is in a first position, the first terminal and the second terminal of each of the connecting terminal means simultaneously contact the corresponding conductor portion, and when the rotating shaft is in a second position, the first terminal and the second terminal of each of the connecting terminal means contact the non-conductor portion of the insulating body.

4. 4. The inverter according to claim 3, wherein the number of said connection terminal means is adjustable along the axial direction.

5. the operating end and the rotation shaft are arranged coaxially, Alternatively, the inverter according to claim 2, wherein the operating end and the rotation shaft are arranged perpendicularly, and the two are connected by a transmission mechanism, and the transmission mechanism includes one of a bevel gear transmission mechanism or a joint transmission mechanism.

6. The inverter according to claim 1 , wherein the locking structure includes a screw structure or a buckle structure, and the mounting portion is locked to the housing wall by a nut or a buckle.

7. a sheath attached to the exterior of the shaft segment, the sheath being attached to the second through hole in a circumferential direction so as to be sealed thereto, and a sealing ring being further provided at an opening position of the second through hole; The inverter according to claim 6, further comprising: a sealing ring provided on the mounting body for sealing the mounting portion.

8. 3. The inverter according to claim 2, wherein the mounting body includes at least two body means, each of which includes at least one connection terminal means, adjacent body means are removably engaged with each other to be assembled, and each body means has a coaxial through-hole that engages with the rotating shaft.

9. 3. The inverter according to claim 2, wherein each of the first terminals and each of the second terminals are located on opposite sides of the mounting body, and adjacent first terminals and adjacent second terminals are arranged offset along the axial direction, or all of the first terminals are arranged in at least one row along the axial direction.

10. The inverter according to any one of claims 2 to 8, characterized in that the mounting body is integrated with a detection means for detecting at least one of the temperature, current, or voltage signal of the connection terminal means.

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