KR102477341B1 - Compressor including cartridge type inverter - Google Patents

Abstract

The present invention relates to a compressor including a cartridge-type inverter capable of reducing manufacturing cost by improving the assemblability of an electric compressor and reducing the size of a gasket by reducing a part requiring watertightness by configuring the inverter in a cartridge type. A compressor housing including a motor unit and a compression unit rotating by the motor unit to compress fluid therein, an inverter housing formed on one side of the compressor housing and including an inverter insertion space, and the compressor in the inverter insertion space It is inserted in a direction crossing the direction in which the housing and the inverter housing are connected, and is characterized in that it comprises an inverter unit including an inverter electrically connected to the motor unit to operate the motor unit.

Description

Compressor including cartridge type inverter {Compressor including cartridge type inverter}

The present invention relates to a compressor including a cartridge-type inverter, and more particularly, in an electric compressor, by forming an inverter unit in a cartridge-type form, the assembly of the compressor is improved, the inverter package is reduced, the sealing property is improved, and maintenance is easy. It relates to a compressor including a cartridge type inverter.

Compressors used in automobiles increase the pressure of refrigerant to facilitate condensation of refrigerant vapor evaporated from the evaporator, convert it into high-temperature/high-pressure refrigerant gas, and then provide it to the condenser.

Compressors used in vehicle air conditioning devices include a compressor driven by receiving driving force of an engine and an electric compressor operated by a motor according to a driving method.

Regarding the conventional electric compressor, there is Korean Patent Publication No. 10-2013-0025649 ("electric compressor", published on March 12, 2013, hereinafter Prior Document 1) filed by the present applicant, and FIG. 1 is a prior art document. It shows a representative drawing of 1.

As shown in FIG. 1 , a conventional electric compressor may include a compressor housing 10 , a gasket 20 and an inverter assembly 30 .

The compressor housing 10 is a part forming the exterior of the electric compressor, and although not shown in FIG. 1, it may include a motor unit and a compression unit therein. As shown in FIG. 1, an inverter assembly 30 including an inverter controlling the motor part of the compressor housing 10 is detachably coupled to one side of the compressor housing 10, and the compressor housing 10 and the inverter assembly Between (30), a gasket 20 for sealing is inserted in accordance with the outer edges of the surfaces that face each other, and then bolts 40 are inserted into the fastening holes 11, 21, and 31 to form a compressor housing 10 and an inverter assembly ( 30) are combined with each other. At this time, the 3-phase pin 12 of the compressor housing 10 shown in FIG. 1 should be inserted into and brought into contact with the hole (not shown) of the 3-phase connector of the inverter assembly 30 so that the compressor housing 10 and the inverter assembly 30 ) of the inverters are electrically connected to each other.

In the electric compressor having the same structure as shown in FIG. 1, there is a risk that the gasket 20 may be displaced when assembling the compressor housing 10 and the inverter assembly 30, and the three-phase pin 12 of the compressor housing 10 or the inverter When the coupling between the three-phase connector holes of the assembly 30 is out of order, the thread of the bolt 40 is worn out, and the coupling between the compressor housing 10 and the inverter assembly 30 becomes loose, causing the gasket 20 to This separation may cause a problem in watertightness, and since the size of the gasket 20 is formed along the outer edge of the surface that faces each other between the compressor housing 10 and the inverter assembly 30 and has a relatively large size, the watertightness This may not be secured, and the number and length of bolts 40 for assembling the compressor housing 10 and the inverter assembly 30 increase, resulting in deterioration in assembly quality.

Korean Patent Publication No. 10-2013-0025649 ("Electric Compressor", Publication Date 2013.03.12.)

The present invention has been made to solve the above problems, and the purpose of the compressor including the cartridge type inverter according to the present invention is to improve the assemblability of the electric compressor by configuring the inverter in a cartridge type, and to improve watertightness. It is an object of the present invention to provide a compressor including a cartridge-type inverter capable of reducing manufacturing cost by reducing the size of a gasket by reducing a necessary part and increasing watertightness.

A compressor including a cartridge-type inverter according to the present invention for solving the above problems is a compressor housing including a motor unit and a compression unit rotating by the motor unit to compress fluid therein, and a horizontal direction of the compressor housing An inverter housing formed on one side and including an inverter insertion space and an inverter unit including an inverter inserted into the inverter insertion space in a direction crossing the horizontal direction and electrically connected to the motor unit to operate the motor unit It is characterized by doing.

In addition, the inverter unit has a high voltage terminal and a low voltage terminal, and is formed on a terminal unit exposed to the outside when inserted into the inverter insertion space, a heat dissipation unit formed on one side of the terminal unit, and the inverter, and is formed on the inverter and the motor unit. Further comprising a connector terminal for electrically connecting, wherein the inverter is formed on one side of the terminal part and is spaced apart from the heat dissipation part by a predetermined distance, and when the inverter part is inserted into and coupled to the inverter insertion space, one surface of the terminal part The inverter housings contact each other to seal the inverter insertion space, and the compressor including the cartridge type inverter further includes a sealing part formed between one surface of the terminal part and the inverter housing, and the heat dissipation part is connected to the inverter At least one or more electronic elements are formed, the inverter insertion space includes a heat dissipation part insertion space at one side of which the heat dissipation part is inserted, a heat dissipation material is applied or formed in the heat dissipation part insertion space, and the connector terminal has three 3 and a phase connector terminal, and the compressor housing further includes three three-phase pins electrically connecting the motor unit and the inverter by contacting each of the three three-phase connector terminals, and the three-phase connector terminal comprises the three phase connector terminals. It includes an internal space into which a 3-phase pin is inserted, one side of which is open to insert the 3-phase pin, and a portion into which the 3-phase pin is inserted is expanded or restored by elasticity, and the 3-phase connector terminal is opened. direction is the same as the direction in which the inverter unit is inserted into the inverter insertion space, the three-phase connector terminals are formed at different positions based on the direction in which the inverter is inserted, and the three-phase pins are the three-phase connector terminals. terminals, the three three-phase connector terminals are each formed in a space partitioned through an insulating partition wall, and the direction in which the inverter unit is inserted intersects the direction in which the compressor housing and the inverter housing are formed. characterized by

According to the compressor including the cartridge type inverter according to the present invention as described above, since the inverter is configured in a cartridge type and inserted and coupled to the inverter insertion space formed in the inverter housing, the inverter is easy to assemble and maintain. In addition, the volume of the compressor and the volume of the inverter are reduced, and the area required for sealing and coupling between the inverter unit and the inverter housing is reduced, so that the sealing member formed in the corresponding part can be miniaturized, improving watertightness and manufacturing a sealing member at the same time Unit cost can be reduced, bolting between the inverter unit and the inverter housing is easy, and the number of required bolts is reduced.

1 is an exploded perspective view of a conventional electric inverter.
Figure 2 is an exploded perspective view of a compressor including a cartridge-type inverter according to an embodiment of the present invention.
3 is a perspective view of an inverter unit according to an embodiment of the present invention;
Figure 4 is a perspective view of a state without some components of the inverter unit according to an embodiment of the present invention.
Figure 5 is a perspective view of a state without some configuration of the inverter unit according to an embodiment of the present invention different from Figure 4;
6 and 7 are cross-sectional schematic views of a compressor including a cartridge-type inverter according to an embodiment of the present invention.
Figure 8 is a schematic diagram in which a three-phase connector terminal and a three-phase pin of a compressor including a cartridge-type inverter according to an embodiment of the present invention are coupled.

Hereinafter, a preferred embodiment of a compressor including a cartridge-type inverter according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view of a compressor including a cartridge-type inverter according to an embodiment of the present invention.

As shown in FIG. 2 , a compressor including a cartridge type inverter according to an embodiment of the present invention may include a compressor housing 100 , an inverter housing 200 and an inverter unit 300 .

The compressor housing 100 accommodates a motor unit (not shown) and a compression unit (not shown) therein.

As shown in Figure 2, the inverter housing 200 has an inverter insertion space 210 is formed on one side of the compressor housing (100).

The inverter insertion space 210 is a portion into which an inverter unit 300, which will be described later, is inserted, and the inverter housing 200 is formed to surround the outer periphery of the inserted portion of the inverter unit 300.

The compressor housing 100 and the inverter housing 200 shown in FIG. 2 may be separated and coupled to each other, but the present invention is not limited thereto and there may be an embodiment of the compressor housing and the inverter housing integrally formed with each other. there is. In addition, the compressor housing and the inverter housing are coupled to each other in a horizontal direction, and the inverter insertion space 210 is open in a direction crossing the horizontal direction, so that the inverter unit 300 also crosses the horizontal direction. inserted

The compressor housing 100 and the inverter housing 200 may be formed of a synthetic resin material, but the present invention does not limit the material of the compressor housing and the inverter housing to the synthetic resin, and if the material of the compressor housing and the inverter housing is an insulating material, It may be changed in consideration of economy or manufacturing convenience.

As shown in FIG. 2 , the inverter unit 300 is a portion inserted into the inverter insertion space 210 and may include an inverter (not shown).

When the inverter unit 300 is inserted into and coupled to the inverter insertion space 210, the inverter is electrically connected to the motor unit included in the compressor housing 100, and a driving signal and power are transmitted to the motor unit to operate the motor unit. serves to transmit.

When the inverter unit 300 is inserted into and coupled to the inverter insertion space 210, the inverter insertion space 210 is sealed, and the above-described inverter is located in the inverter insertion space 210.

Even when the inverter unit 300 is inserted into and coupled to the inverter insertion space 210 , liquid such as water may penetrate into the inverter insertion space 210 . In order to prevent this situation, the present invention is a sealing member (gasket) on the surface in contact with the inverter housing 200 and the terminal portion 310, which is a portion exposed to the outside when the inverter unit 300 is inserted into the inverter insertion space 210 , Not shown), it is possible to secure the watertightness of the inverter insertion space 210. When the sealing member is applied to the structure of one embodiment of the present invention shown in FIG. 2, the space between the terminal portion 310 and the inverter housing 200 requiring sealing is reduced compared to the prior art, so the conventional Compared to the method, the size of the sealing member is reduced, so the probability of the sealing member breaking away is reduced, and there is an effect of reducing the manufacturing cost due to the size reduction of the sealing member.

The open direction of the inverter insertion space 210 included in the inverter housing 200 may cross the direction in which the compressor housing 100 and the inverter housing 200 are extended, and in one embodiment of the present invention, the inverter insertion The open direction of the space 210 is orthogonal to the direction in which the compressor housing 100 and the inverter housing 200 are formed. This method can reduce the volume of the compressor itself and the volume of the inverter unit compared to the conventional method, and the range in which the bolt coupling the inverter unit 300 and the inverter housing 200 is installed is reduced (terminal unit 310 of the inverter unit). ) The number of bolts can be reduced, and the length of the bolts is also reduced.

FIG. 3 is a reversed view of only the inverter unit 300 shown in FIG. 2 .

As shown in FIG. 3 , the inverter unit 300 may further include an inverter 320 and a heat dissipation unit 330 in addition to the aforementioned terminal unit 310, and the inverter 320 and the heat dissipation unit 330 are inverters. Unlike the terminal part 310, when the part 300 is inserted into the inverter insertion space 210, it is a part located inside the closed structure.

As described above, the terminal unit 310 is a portion exposed to the outside when the inverter unit 300 is inserted into the inverter insertion space 210 and coupled to the inverter housing 200, and includes a high voltage terminal (not shown) and a low voltage terminal ( not shown) is formed. The high voltage and low voltage terminals are connected to an external power source to receive power.

The inverter 320 extends to one side of the terminal unit 310, that is, to the side where the inverter unit 300 is inserted into the inverter insertion space 210. The inverter 320 is a kind of printed circuit board (PCB, Printed Circuit Board).

FIG. 4 is a view showing only the inverter 320 by removing the heat dissipation unit 330 in FIG. 3 .

As shown in FIG. 4 , the inverter 320 may include three three-phase connector terminals 321 as connector terminals for connection with the motor unit included in the compressor housing 100 .

As shown in FIG. 4 , the three-phase connector terminal 321 is connected to the inverter 320 through a soldering pin 322 and a wire. Each of the three three-phase connector terminals 321 is formed in each space partitioned on the inverter 320 through an insulating barrier rib 323, which includes three-phase connector terminals 321 and soldering pins 322 connected to each other. and for insulation of each of the wires.

The insulating barrier rib 323 is formed of a material capable of insulating and having a strength of a predetermined level or higher, and may be omitted when it is determined that the insulating ability of one embodiment of the present invention is sufficient.

FIG. 5 shows only the terminal unit 310 and the heat dissipation unit 330 by omitting the above-described inverter 320 and the components formed in the inverter 320 in a state in which FIG. 3 is turned over.

As shown in FIGS. 3 and 5 , the heat dissipation part 330 is also formed extending to one side of the terminal part 310 like the inverter 320, but spaced apart from the inverter 320 by a predetermined distance. That is, the inverter 320 and the heat dissipation unit 330 may be formed parallel to and spaced apart from each other.

As shown in FIG. 5, in the heat dissipation unit 330, various electronic devices 331 necessary for driving the inverter 320 may be formed on a surface facing the inverter 320, and the electronic device 331 is a wire. It may be electrically connected to the inverter 320 through 332. The heat dissipation unit 330 may be formed of a material having a large heat capacity, typically aluminum, in order to dissipate heat generated from the electronic device 331 to the outside.

The electronic device 331 may be various electronic devices necessary for driving the inverter, and may be a switching device in which heat is generated the most.

Hereinafter, a process of coupling the inverter unit 300 to the inverter housing 200 will be described in more detail with reference to FIGS. 6 and 7 .

6 and 7 are cross-sectional schematic views illustrating a process in which the inverter unit 300 is coupled to the inverter housing 200 in one embodiment of the present invention.

6 and 7 show a motor unit 110 included in the compressor housing 100 and a three-phase pin 120 connected to the motor unit 110, and the inverter housing 200 has an inverter insertion space 210 ) and the heat dissipation unit insertion space 211 are shown.

In FIGS. 6 and 7 , the terminal unit 310 is divided into a high voltage terminal unit and a low voltage terminal unit, so it is shown to be separately separated, but the high voltage terminal unit and the low voltage terminal unit are not distinguished through separate drawings.

The 3-phase pin 120 is a part to which the 3-phase connector terminal 321 of the above-described inverter unit 300 is connected to electrically connect the motor unit 110 and the inverter 320, and the 3-phase connector terminal 321 ) Corresponding to the number of three (see FIG. 4), three may be formed. 6 and 7 are shown as a single unit because they are schematic diagrams, and the coupling of the three-phase connector terminal 321 and the three-phase pin 120 will be described later.

The heat dissipation unit insertion space 211 shown in FIG. 6 is a space where the heat dissipation unit 330 interviews when the inverter unit 300 is inserted, and has a size corresponding to the heat dissipation unit 330 on one side of the inverter insertion space 210. It may be a shape in which a sliding groove is formed. A heat dissipation material may be applied or formed in the heat dissipation unit insertion space 221 .

The heat dissipation material may be a material capable of insulating while facilitating heat conduction, and typically may be a form in which a heat dissipation material in a gel state such as thermal grease is applied or a heat dissipation pad is attached.

FIG. 8 schematically illustrates a process in which a 3-phase pin and a 3-phase connector terminal are coupled to each other in the process of FIGS. 6 and 7 by showing only the 3-phase pin and the 3-phase connector terminal.

8A is a state in which the inverter unit 300 is not completely inserted into the inverter insertion space 210 as shown in FIG. 6, and FIG. 8B is a state in which the inverter unit 300 is completely inserted into the inverter insertion space 210 as shown in FIG. state An arrow direction shown in FIG. 8A is a direction in which the inverter unit 300 is inserted into the inverter insertion space 210 .

In FIG. 8, three three-phase pins and three-phase connector terminals are shown, and since they are coupled to each other in contact with each other, a pair of three-phase pins and three-phase connector terminals coupled to each other are identified by adding subscripts such as a, b, and c. .

As shown in Fig. 8, the single three-phase connector terminals 321a, 321b, and 321c have a press-fit structure. More specifically, the three-phase connector terminals 321a, 321b, and 321c have one side opened and slid to have a space (hereinafter referred to as an insertion space) into which the three-phase pins 120a, 120b, and 120c are inserted when coupled with the three-phase pin, and the insertion space The inlet portion of has a structure that is expanded or restored by the three-phase pins 120a, 120b, and 120c. That is, the three-phase connector terminals 321a, 321b, and 321c are formed integrally with the inverter 320, but the inlet portion of the insertion space is not completely coupled to the surface of the inverter 320, and expands by elasticity within a predetermined range. And it can be a structure that can be restored.

The three three-phase connector terminals 321a, 321b, and 321c may be formed at different positions based on the direction in which the inverter 300 is inserted. 8, the leftmost three-phase connector terminal 321a is located at the lowest among the three, and the three-phase connector terminal 321b located in the center is located in the middle and rightmost. The three-phase connector terminal 321c is located at the uppermost side, and the three-phase pins 120a, 120b, and 120c corresponding to each of the three-phase connector terminals are also the same.

The structure as described above prevents the 3-phase connector terminal and the 3-phase pin from being connected to each other when an operator accidentally turns the inverter unit 300 upside down and inserts it into the inverter insertion space 210, so that incorrect assembly can be recognized. in order to allow

An open direction of the 3-phase connector terminal 321 may coincide with a direction in which the inverter unit 300 is inserted. Through this, the inverter unit 300 can be easily coupled to the three-phase pin 120 even if the direction in which the inverter unit 300 is inserted is changed to the left, right, or up and down directions.

The present invention is not limited to the above embodiments, and the scope of application is diverse, and various modifications and implementations are possible without departing from the gist of the present invention claimed in the claims.

10, 100: compressor housing 12: 3-phase pin
20: gasket 30: inverter assembly
11, 21, 31: fastening hole 40: bolt
110: motor unit 120: 3-phase pin
200: inverter housing 210: inverter insertion space
211: heat sink insertion space
300: inverter unit 310: terminal unit
320: printed circuit board 321: 3-phase connector terminal
322: soldering pin 323: partition wall for insulation
330: heat sink 331: electronic device
332: wires

Claims (11)

A compressor housing including a motor unit and a compression unit rotating by the motor unit to compress fluid therein;
an inverter housing formed on one side of the compressor housing and including an inverter insertion space; and
an inverter unit including an inverter inserted into the inverter insertion space in a direction crossing a direction in which the compressor housing and the inverter housing are connected and electrically connected to the motor unit to operate the motor unit;
Including,
The inverter unit further includes a connector terminal formed on the inverter and electrically connecting the inverter and the motor unit,
The connector terminal includes three three-phase connector terminals,
The compressor housing further includes three three-phase pins that contact the three three-phase connector terminals and electrically connect the motor unit and the inverter,
The three-phase connector terminals are formed at different positions based on the direction in which the inverter is inserted,
Compressor including a cartridge-type inverter, characterized in that the three-phase pin is formed at a position corresponding to the three-phase connector terminal.
According to claim 1,
The inverter unit has a high voltage terminal and a low voltage terminal, and a terminal unit exposed to the outside when inserted into the inverter insertion space; and
Further comprising a heat dissipation portion formed on one side of the terminal portion,
The inverter is formed on one side of the terminal unit and is spaced apart from the heat dissipation unit by a predetermined distance.
According to claim 2,
When the inverter unit is inserted into and coupled to the inverter insertion space, one surface of the terminal unit and the inverter housing come into contact with each other to seal the inverter insertion space,
The compressor including the cartridge type inverter further comprises a sealing part formed between one surface of the terminal part and the inverter housing.
According to claim 2,
The compressor including a cartridge-type inverter, characterized in that the heat dissipation unit is formed with at least one or more electronic elements connected to the inverter.
According to claim 2,
The inverter insertion space is a compressor including a cartridge-type inverter, characterized in that it comprises a heat dissipation unit insertion space into which the heat dissipation unit is inserted at one side.
According to claim 5,
Compressor including a cartridge-type inverter, characterized in that the heat dissipation material is applied or formed in the heat dissipation unit insertion space.
delete According to claim 1,
The three-phase connector terminal includes an inner space into which the three-phase pin is inserted, and one side is open to insert the three-phase pin, and the portion into which the three-phase pin is inserted is expanded or restored by elasticity. Compressor comprising a cartridge-type inverter characterized by.
According to claim 8,
A compressor including a cartridge-type inverter, characterized in that the direction in which the three-phase connector terminal is opened is the same as the direction in which the inverter unit is inserted into the inverter insertion space.
delete According to claim 1,
A compressor including a cartridge-type inverter, characterized in that the three three-phase connector terminals are each formed in a space partitioned through an insulating barrier rib.

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