JP2005023934A - Hermetic electric compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic electric compressor, simply preventing contact and short-circuit between liquid refrigerant and a conducting terminal portion 48 even in the case of the raising liquid level of the liquid refrigerant flowing therein. <P>SOLUTION: The hermetic electric compressor 100 comprises a sealed container 10 which stores a compressor part 20, an electric motor part 30 and a connection part 40 consisting of the conducting terminal portion 48 and a terminal case 42. The terminal case 42 is fixed to the inner wall of the sealed container 10 with air tightness, and a terminal case hole 49 communicated with the inside of the sealed container 10 and opened with an area not larger than a preset micro area is formed in a position a preset length downward from a position where the conducting terminal portion 48 is arranged. Thus, even when the liquid level of the liquid refrigerant flowing into the sealed container 10 gets closer to the terminal case 42, the entry of the liquid refrigerant into the terminal case 42 is prevented by atmospheric pressure in the terminal case 42, which simply prevents the contact and short-circuit between the liquid refrigerant and the conducting terminal portion 48. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric refrigerant compressor mainly used for a vehicle.

  2. Description of the Related Art Conventionally, there is an electric type compressor for compressing a refrigerant circulating mainly in a refrigeration cycle for air conditioning of a vehicle.

  This electric compressor is composed of a compressor section that compresses a refrigerant and an electric motor section that drives the compressor section in a sealed container, both of which are housed in a sealed container.

  And in many cases, the refrigerant | coolant which flows in in an airtight container is used for cooling of the electric motor part which rotates in order to drive a compressor part.

  The refrigerant flowing in at this time is a refrigerant that has become a gas from the evaporator located upstream of the refrigeration cycle.

  However, at low temperatures such as in winter, the gaseous refrigerant in the refrigeration cycle may condense and the state may transition to liquid refrigerant.

  Generally, when the refrigerant is in a gaseous state, the refrigerant has a characteristic that the conductivity is low and the resistance value is high. However, the liquefied refrigerant has a high conductivity and a low resistance value.

  In addition, the electric compressor is often installed below other components constituting the refrigeration cycle, and the liquid refrigerant condensed in the refrigeration cycle flows into the sealed container of the electric compressor, The liquid level of the liquid refrigerant rises. For this reason, various methods are used so that the liquid refrigerant does not come into contact with the conductive parts in the sealed container.

  As one of them, since the liquefied refrigerant is stored below the sealed container according to gravity, there is a sealed electric compressor designed to dispose conductive parts above the sealed container.

As another method, there is a hermetic electric compressor in which conductive parts are completely molded with resin or the like to improve waterproofness (for example, Patent Document 1).
JP 10-318173 A

  However, in the case of a design in which the conductive parts in the above-described sealed container are arranged in an upward position so as not to come into contact with the liquid refrigerant stored in the bottom of the sealed container, it is possible to meet the recent demand for downsizing. It becomes difficult.

  Further, when the conductive parts are completely molded with a resin or the like, there is a problem that the molding process must be performed in a state in which the conductive parts are assembled in a sealed container, which takes time and labor.

  The present invention has been made in view of the above points. In other words, when the liquid refrigerant flows into the electric compressor from other components that form the refrigeration cycle at low temperatures such as in winter, and the liquid level of the liquid refrigerant in the electric compressor rises, the liquid refrigerant can conduct with a simple structure. It is an object of the present invention to provide a hermetic electric compressor capable of preventing contact with a functional component and preventing the electric compressor from being stopped due to a short circuit.

  The hermetic electric compressor according to claim 1 includes: a hermetic container; a compressor part that compresses a refrigerant in the hermetic container; an electric motor part that drives the compressor part; and the electric motor part. A hermetic electric compressor comprising a conductive terminal portion connected to an electric circuit outside the hermetic container, and a connection portion including a terminal case covering the conductor end portion with a material having resistance to refrigerant and oil. The terminal case is hermetically fixed to the inner wall of the sealed container, and at a position having a predetermined length downward from a position where the conductive terminal portion is disposed. An opening that communicates with the inside and opens with an area of a predetermined minute area or less is formed.

  According to this invention, even if the liquid refrigerant condensed in the refrigeration cycle flows into the sealed container and is gradually stored in the bottom of the sealed container so that the liquid level approaches the terminal case, the predetermined refrigerant is formed in the terminal case. Because the liquid refrigerant is less likely to enter the terminal case due to the opening that opens with an area that is less than a small area, the liquid level rise rate of the liquid refrigerant can be slowed, transiently compared to the outside of the terminal case The liquid level inside the terminal case can be lowered. Thereby, a conductive terminal part can be insulated without a problem practically. Therefore, it is possible to prevent contact between the liquid refrigerant and the conductive terminal portion with a simple structure and to prevent the operation of the electric compressor from being short-circuited.

The hermetic electric compressor according to claim 2 is the hermetic electric compressor according to claim 1, wherein the predetermined minute area is determined based on the inner volume of the terminal case, and the terminal case volume is 1200 mm ³ . It is characterized by opening with a very small area of ² mm ² or less.

  As a result, the liquid refrigerant can be reliably prevented from flowing into the terminal case, and the pressure inside and outside the terminal case can be kept at the same level. It is possible to prevent a large pressure difference from occurring.

  The hermetic electric compressor according to claim 3 is characterized in that the opening is formed on a side surface having a predetermined length downward from a position of the conduction terminal portion.

  The conduction terminal portion is a portion where the power supply circuit outside the hermetic container and the electric motor portion are substantially connected. The electric power supplied from the electric power supply circuit is transmitted to the lead wire extending from the electric motor unit through the conduction terminal unit.

  In many cases, the conduction terminal portion is positioned substantially above the electric motor portion. Therefore, if a tension is applied to the lead wire in the downward direction, that is, the downward direction from the electric motor portion side, the conduction terminal portion is substantially Connection cannot be maintained, and in other words, it may fall out.

  Therefore, according to the present invention, an opening through which a lead wire connecting the conduction terminal portion and the electric motor portion is inserted is provided on the side surface of the terminal case, and the lead wire is inserted into the opening portion provided on the side surface of the terminal case. Thus, the lead wire bends so as to be substantially orthogonal to the downward extending line of the conduction terminal portion.

  As a result, even when a downward tension is applied to the lead wire, it is possible to easily maintain the substantial connection of the conductive terminal portion.

  The hermetic electric compressor according to claim 4 is characterized in that the hermetic container is formed so as to sandwich the terminal case from above and below.

  According to the present invention, since it is not necessary to separately provide a means for fixing the terminal case and the sealed container, the terminal case can be easily fixed.

  The hermetic electric compressor according to claim 5 is characterized in that an elastic body is sandwiched between the upper surface of the terminal case and the inner wall of the hermetic container, and is hermetically fixed.

  Generally, the sealed container is made of aluminum, while the terminal case is made of resin.

  Therefore, even if these two members are directly brought into close contact with each other, the airtightness between the inner wall of the sealed container and the upper surface of the terminal case is not desirable.

  However, an elastic body such as rubber is sandwiched between the inner wall of the sealed container and the upper surface of the terminal case.According to the present invention, the airtightness in the terminal case can be secured, and the liquid refrigerant has a liquid level. Even if it reaches the upper surface of the terminal case from the outside, it is possible to further prevent the liquid refrigerant from entering the terminal case (conductive terminal portion) from the upper surface of the terminal case.

  The hermetic electric compressor according to claim 6 is characterized in that a lock mechanism for sandwiching the terminal case from the left-right direction is formed in the elastic body.

  According to the present invention, the terminal case can be airtightly fixed from the elastic body side, so it is not necessary to form the inner wall of the sealed container to support the lower surface of the terminal case, and the terminal case can be easily fixed. become.

  The hermetic electric compressor according to claim 7, wherein an O-ring is inserted into a conduction drawing pin constituting the conductive terminal portion, and the O-ring is interposed between the elastic body and the terminal case. It is arranged at the position.

  According to the present invention, the airtightness in the terminal case can be further enhanced, and even if the liquid refrigerant has permeated from the outside to the upper surface of the terminal case, the liquid refrigerant can be obtained by the O-ring inserted in the conductive terminal portion. It is possible to prevent contact with the conductive terminal portion, and therefore it is possible to prevent a short circuit due to the liquid refrigerant.

  The hermetic electric compressor according to claim 8 is characterized in that the upper surface of the terminal case is formed with a 10-point average roughness of 25 Z or less and a flatness of 0.2 mm or less.

  According to the present invention, the adhesion between the upper surface of the terminal case and the elastic body, or the lower surface of the terminal case and the bottom surface of the terminal case hole can be improved, so that the airtightness in the terminal case can be further secured. It becomes.

  The hermetic electric compressor according to claim 9 is characterized in that the terminal case has a convex protrusion along the outer periphery of the upper surface.

  According to the present invention, even if the liquid level of the liquid refrigerant rises and penetrates to the upper surface of the terminal case, the liquid refrigerant reaches the inside of the terminal case by the convex protrusion formed on the outer periphery of the terminal case. Can be prevented from penetrating, and airtightness in the terminal case can be secured.

  The hermetic electric compressor according to claim 10 is the hermetic electric compressor according to claim 1, wherein the terminal case is provided with a lead wire hole through which a lead wire leading from the conductive terminal portion to the electric motor portion passes. The opening having a predetermined small area is an opening remaining after the lead wire passes through the lead wire hole.

  Accordingly, the opening can be easily formed by using the lead wire hole.

  Note that, as in the hermetic electric compressor according to the eleventh aspect, the opening may be provided separately from the lead wire hole.

(First embodiment)
A hermetic electric compressor 100 according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an outline of the configuration of a hermetic electric compressor 100 of the present invention.

  In FIG. 1, reference numeral 10 denotes a sealed container of the hermetic electric compressor 100. The hermetic container 10 is formed with a refrigerant inlet 11 through which refrigerant flows and a refrigerant outlet 12 through which compressed refrigerant is discharged.

  In the sealed container 10, the refrigerant flowing from the refrigerant suction port 11 is compressed, the compressor portion 20 that discharges the compressed refrigerant from the refrigerant discharge port 12, and the compressor portion 20 for compressing the refrigerant. The electric motor unit 30 that generates and transmits power (rotational power) is connected to the electric motor unit 30 and an inverter circuit 50 disposed outside the sealed container 10 (usually at the top of the sealed container 10). The connection part 40 is accommodated.

  And it is the inverter circuit 50 that supplies the rectified voltage to the electric motor unit 30 through the connection unit 40, and mainly the above-described sealed container 10, the compressor unit 20, the electric motor unit 30, and the connection unit. 40 and the inverter circuit 50 constitute the hermetic electric compressor 100. Incidentally, the inverter circuit 50 corresponds to an electric circuit shown in the claims.

  FIG. 2 shows details of the structure of the connecting portion 40.

  A connecting portion 40 shown in FIG. 2 includes a terminal case 42 made of a resin covering a conductive terminal portion 48 to be described later, a base housing 43 serving as a basis for fixing the terminal case 42, and the base housing 43. 10, a fixing block rubber 45 that is sandwiched between a fixing bolt 44 that is fixed to the terminal 10, a terminal case 42, and a base housing 43, and is made of an elastic body that enhances airtightness on the upper surface side of the terminal case 42; In order to increase the airtightness between the fixed block rubber 45, the gasket 46 sandwiched between them, the lead wire 31 extending from the electric motor portion 30 to the connection portion 40, and the pin extending from the inverter circuit 50 to the connection portion 40 The socket terminal 47 is electrically connected so as to be sandwiched in the vertical direction.

  The lead wire 31 described above is composed of the coating portion 31a and the lead portion 31b, and the pin 51 is sandwiched between the socket terminals 47 because the coating portion 31a is peeled off, that is, the lead portion 31b that is in a naked state. It is.

  A portion where the pin 51 and the lead portion 31 b are sandwiched between the socket terminals 47 described above and the electrical connection is substantially maintained is referred to as a conductive terminal portion 48. The terminal case 42 is formed so as to cover the conductive terminal portion 48 in order to protect the conductive terminal portion 48 from a short circuit due to intrusion of refrigerant or the like. Further, the base housing 43 and the fixed block rubber 45 are provided with a pin hole 43a for the base housing 43 through which the pins 51 are inserted, and a pin hole 45a for the fixed block rubber 45 corresponding to the number of pins 51.

  Incidentally, the fixed block rubber 45 is a rubber material (for example, H-NBR or the like) excellent in refrigerant resistance, and corresponds to an elastic body shown in the claims.

  The terminal case 42, the base housing 43, the fixing bolt 44, the fixing block rubber 45, and the gasket 46 described above are accommodated in a dedicated accommodation hole 41 formed in the sealed container 10. FIG. 3 is an explanatory view showing a cross section of the sealed container 10 in which the accommodation hole 41 is simply drilled.

  The housing hole 41 shown in FIG. 3 has a structure in which the inner diameter is small in three stages from the outside to the inside of the sealed container 10, and the hole for the base housing 43 having the largest inner diameter is located on the outermost side. 41a is a hole in which the base housing 43 described above is accommodated.

  Then, the fixed block rubber 45 and the terminal case 42 are accommodated in the hole 41b for the terminal case 42 which communicates with the hole 41a for the base housing 43 directly below and has a smaller inner diameter than the hole 41a for the base housing 43. Is done.

  Further, a lead wire 31 hole 41c having an inner diameter smaller than that of the terminal case 42 hole 41b is provided immediately below the terminal case 42 hole 41b so as to communicate with the terminal case 42 hole 41b.

  The lead wire 31 hole 41c is not provided only for accommodating the lead wire 31 described above. The fixed block rubber 45 accommodated in the terminal case 42 hole 41b and the terminal case 42 are separated by gravity. Accordingly, in order to support the fixed block rubber 45 and the terminal case 42 so as not to drop from the terminal case 42 hole 41b, the hole is provided as a hole having a smaller inner diameter than the terminal case 42 hole 41b.

  In FIG. 2, the terminal case 42 described above is provided with a terminal case hole 49 for allowing the lead wire 31 to enter the terminal case 42 and communicating with the inside of the sealed container 10 on the lower surface 42β.

The terminal case hole 49 is not hermetically sealed by passing the lead wire 31, but is large enough to keep the air pressure inside and outside the terminal case 42 even after the lead wire 31 is passed (specifically, An opening area of 1 mm ² to ² mm ² is left for a terminal case volume of 1200 mm ³ . The remaining opening of the terminal case hole 49 corresponds to the opening shown in the claims.

  Further, the upper surface 42α of the terminal case 42 is kept in airtightness in the terminal case 42 by being in close contact with the fixed block rubber 45. The surface roughness of the upper surface 42α of the terminal case 42 is determined by a ten-point average roughness method. In this case, it is preferable that the flatness is approximately 25 z or less and the flatness is 0.2 mm or less.

  With the upper surface 42α of the terminal case 42 having the above-described surface roughness and flatness, it is possible to achieve close contact with the fixed block rubber 45 while maintaining high airtightness.

  In the hermetic electric compressor 100 including the connecting portion 40 having the above-described configuration, for example, at a low temperature, the refrigerant in the other constituent elements constituting the refrigeration cycle condenses into a liquid refrigerant and flows into the sealed container 10. Even when the liquid refrigerant level reaches the connection part 40 and the terminal case 42 is immersed in the liquid refrigerant level, the upper surface 42α of the terminal case 42 is fixed block rubber. 45, the gasket 46, and the base housing 43 are hermetically sealed, so it is difficult for the liquid refrigerant to enter from the upper surface 42α of the terminal case 42.

  Since the terminal case 42 is not provided with an entrance for liquid refrigerant other than the terminal case hole 49, the liquid refrigerant is contained in the terminal case 42 by the squeezing action of the terminal case hole 49 opened to a small area. Hard to invade.

  For this reason, compared with the outer side of the terminal case 42, the rising speed of the liquid refrigerant surface is slower inside the terminal case 42, and the time until the liquid refrigerant liquid surface contacts the conductive terminal portion 48 can be delayed. It becomes. The poor insulation that occurs when the conductive terminal portion 48 is short-circuited due to the rise in the liquid level of the liquid refrigerant is a problem at night when the temperature is particularly low in winter.

  Accordingly, the conduction terminal portion 48 in the terminal case 42 is disposed above the position from the beginning, in other words, from the position where the liquid refrigerant liquid level that has entered from the terminal case hole 49 is expected to rise overnight. For example, by forming the terminal case hole 49 at a position below the conductive terminal portion 48 by a predetermined length, it is possible to prevent the liquid refrigerant from contacting the conductive terminal portion 48, and the sealed type It is possible to prevent the electric compressor 100 from being short-circuited.

(Second embodiment)
In the first embodiment described above, the lead wire 31 that reaches the connection portion 40 from the electric motor portion 30 is wired substantially vertically.

  However, in this configuration, for example, when a downward tension is applied to the lead wire 31 below the connection portion 40, the tension is applied directly to the socket terminal 47, and the lead portion 31b and the pin 51 are connected. The socket terminal 47 that is electrically connected so as to be sandwiched cannot maintain the sandwiched configuration due to the tension applied from below, and the electrical connection may be disconnected.

  Therefore, as shown in FIG. 4, a terminal case hole 49 may be formed in the side surface 42γ of the terminal case 42.

  In FIG. 4, since the terminal case hole 49 is formed in the side surface 42γ of the terminal case 42, the lead wire 31 passing through the terminal case hole 49 to the electric motor unit 30 is approximately 90 degrees on the lower surface 42 β of the terminal case 42. It will bend.

  Since the lead wire 31 is bent by approximately 90 degrees in front of the conductive terminal portion 48, even if the lead wire 30 is tensioned downward, the tension may damage the sandwiching structure of the socket terminal 47. Will be less.

  Of course, the drilled position of the terminal case hole 49 drilled in the side surface 42γ of the terminal case 42 is a position separated by a predetermined length downward from the conduction terminal portion 48.

(Third embodiment)
In the configuration shown in the first and second embodiments described above, the fixed block rubber 45 and the terminal case 42 have an inner diameter larger than that of the terminal case 42 hole 41b so that the fixed case rubber 45 and the terminal case 42 do not fall from the terminal case 42 hole 41b according to gravity. A small hole 41c for the lead wire 31 is provided in communication.

  For this reason, the accommodation hole 41 drilled in the sealed container 10 must be formed as three holes having different inner diameters, which is troublesome in processing.

  Therefore, a lock mechanism 45b is provided in the fixed block rubber 45 so that the terminal case 42 can be sandwiched from the left and right directions. The lock mechanism 45b prevents the terminal case 42 from falling and eliminates the need for forming the lead wire 31 hole 41c. The labor for processing the accommodation hole 41 may be reduced.

  FIG. 5 is an explanatory diagram of the connecting portion 40 constituted by the fixed block rubber 45 provided with the lock mechanism 45b.

  The lock mechanism 45b of the fixed block rubber 45 allows the terminal case 42 to be hermetically adhered, and the terminal case 42 can be prevented from falling downward, so the terminal case 42 hole 41b. It is not necessary to provide a hole having a smaller inner diameter directly below the terminal case 42 hole 41b, and the processing of the accommodation hole 41 can be simplified.

(Fourth embodiment)
The upper surface 42α of the terminal case 42 used in each of the above-described embodiments is in airtight contact with the fixed block rubber 45.

  Further, whether the lower surface 42β of the terminal case 42 is in airtight contact with the bottom surface of the terminal case 42 hole 41b depends on whether or not the lock mechanism 45b is provided on the fixed block rubber 45.

  In the present embodiment, the lock mechanism 45b is not provided in the fixed block rubber 45, and in order to prevent the terminal case 42 from dropping, the lead wire 31 hole 41c communicating directly below the terminal case 42 hole 41b is provided. The connection part 40 accommodated in the accommodation hole 41 is proposed.

  By forming a ring-shaped protrusion on the outer circumference of the upper surface 42α of the terminal case 42, it is possible to improve the adhesion between the upper surface 42α of the terminal case 42 and the fixed block rubber 45.

  FIG. 6 is an explanatory diagram of the connecting portion 40 configured by the terminal case 42 provided with a ring-shaped protrusion 42a on the outer circumference of the upper surface 42α.

  FIG. 6 shows the position where the liquid refrigerant has entered the terminal case hole 49, but when the liquid pressure of the liquid refrigerant rises, the side face 42γ of the terminal case 42 and the terminal case 42 hole 41b It is conceivable that the liquid refrigerant permeates upward from the joint surface, that is, from the outside of the terminal case 42.

  Even if the liquid refrigerant reaches the upper surface 42α of the terminal case 42, the protrusion 42a provided on the upper surface 42α of the terminal case 42 can prevent the liquid refrigerant from entering the terminal case 42. Become.

  Although the protrusion 42a provided on the upper surface 42α of the terminal case 42 described above is shown as a single ring shape, the present invention is not limited to this, and tens of protrusions may be provided on concentric circles.

(Fifth embodiment)
As a method for further improving the airtightness of the connecting portion 40 shown in each of the above-described embodiments, an O-ring 51a is inserted into the pin 51 that penetrates the fixed block rubber 45, and the O-ring 51a is connected to the fixed block rubber 45 and a terminal. You may arrange | position so that it may be located between cases 42.

  FIG. 7 shows an explanatory diagram of the connecting portion 40 in which the pin 51 is inserted into the O-ring 51 a and the O-ring 51 a is disposed between the fixed block rubber 45 and the terminal case 42.

  When the liquid refrigerant penetrates between the fixed block rubber 45 and the upper surface 42α of the terminal case 42, it is not present except for the adhesion between the fixed block 45 and the terminal case 42 that prevents further penetration.

  For this purpose, the pin 51 is inserted into the O-ring 51 a in advance, and the O-ring 51 a is disposed so as to be positioned between the fixed block rubber 45 and the terminal case 42, thereby improving the airtightness in the terminal case 42. Further, the liquid refrigerant and the pin 51 come into contact with each other even when the liquid refrigerant permeates the joint surface of the fixed block rubber 45 and the upper surface 42α of the terminal case 42, and the hermetic electric compressor 100 Can be prevented from short-circuiting.

(Sixth embodiment)
In the first to fifth embodiments described above, the fixed block rubber 45 is in close contact with the entire upper surface 42α of the terminal case 42 to maintain the airtightness in the terminal case 42. As shown, each pin 51 is inserted, and it is good also as a tube-shaped thing closely_contact | adhered to each electroconductive terminal part 48 and its outer area | region, respectively.

(Other embodiments)
In the first to sixth embodiments described above, the opening left in the terminal case hole 49 after passing the lead wire 31 is taken as an example of the opening shown in the claims, but the present invention is limited to this. Instead, as shown in FIG. 9, a lead wire hole having a size that can be completely blocked by the lead wire 31 passing therethrough is provided exclusively, and separately from the lead wire hole, an opening (49a) shown in the claims is provided. ) may be provided in such a way that ^{1 mm} 2 to 2 mm ² approximately of minute area a with respect to the terminal casing volume 1200 mm ^3.

2 is an explanatory diagram showing an outline of a configuration of a hermetic electric compressor 100. FIG. It is explanatory drawing which shows the outline of a structure of the connection part 40 in 1st embodiment of this invention. It is explanatory drawing which shows the accommodation hole 41 provided in the airtight container 10 of the airtight electric compressor 100 in 1st embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the connection part 40 in 2nd embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the connection part 40 in 3rd embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the connection part 40 in 4th embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the connection part 40 in 5th embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the connection part 40 in 6th embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the connection part 40 in other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Airtight container 11 Refrigerant suction port 12 Refrigerant discharge port 20 Compressor part 30 Electric motor part 31 Lead wire 40 Connection part 41 Accommodating hole 42 Terminal case 42 (alpha) Upper surface 42 (gamma) Side surface 42a Protrusion 43 Base housing 44 Fixing bolt 45 Fixed block rubber (elastic body) )
45b Lock mechanism 46 Gasket 47 Socket terminal 48 Conductive terminal 49 Terminal case hole (opening)
50 Inverter circuit (electric circuit)
51 pin 51a O-ring 100 hermetic electric compressor

Claims (11)

An airtight container, a compressor part that compresses a refrigerant in the airtight container, an electric motor part that drives the compressor part, and a conductive terminal part that connects the electric motor part to an electric circuit outside the airtight container And a hermetic electric compressor that accommodates a connecting portion made of a terminal case that covers the conductor end portion with a refrigerant-resistant and oil-resistant material,
The terminal case is hermetically fixed to the inner wall of the sealed container, and communicates with the inside of the sealed container at a predetermined length downward from the position where the conductive terminal portion is disposed. The hermetic electric compressor is characterized in that an opening having an opening with an area of a predetermined minute area or less is formed. ^2. The hermetic electric compressor according to claim 1, wherein the predetermined minute area is 2 mm ² or less with respect to a volume of 1200 mm ^{3 of the} terminal case.   3. The hermetic electric compressor according to claim 1, wherein the opening is formed on a side surface having a predetermined length downward from a position of the conduction terminal portion.   4. The hermetic electric compressor according to claim 1, wherein the hermetic container is formed so as to sandwich the terminal case from above and below.   5. The hermetic electric compressor according to claim 1, wherein an elastic body is sandwiched between an upper surface of the terminal case and an inner wall of the hermetic container and is hermetically fixed.   The hermetic electric compressor according to claim 5, wherein a lock mechanism that sandwiches the terminal case from the left and right directions is formed in the elastic body.   The O-ring is inserted into a conduction lead pin constituting the conductive terminal portion, and the O-ring is disposed at a position between the elastic body and the terminal case. 6. The hermetic electric compressor according to 6.   The sealed electric motor according to any one of claims 5 to 7, wherein the upper surface of the terminal case is formed with a 10-point average roughness of 25Z or less and a flatness of 0.2 mm or less. Compressor.   9. The hermetic electric compressor according to claim 5, wherein the terminal case has a convex protrusion along the outer periphery of the upper surface. The terminal case is provided with a lead wire hole through which a lead wire leading from the conductive terminal portion to the electric motor portion passes.
2. The hermetic electric compressor according to claim 1, wherein the opening having a predetermined minute area is an opening that remains after the lead wire passes through the lead wire hole. The terminal case is provided with a lead wire hole through which a lead wire leading from the conductive terminal portion to the electric motor portion passes.
2. The hermetic electric compressor according to claim 1, wherein the opening having the predetermined minute area is an opening provided separately from the lead wire hole.

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