JP2000291556A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve energy efficiency with its noise suppressed in a hermetic compressor. SOLUTION: This compressor is provided with a motor part 4 located down below at the lower side in the vertical direction as a power source, a machine part 3 of a crank shaft 10 to be driven by the motor part 4 at the upper side of the motor part 4, a piston 9, a cylinder 7 and the like, a block 20 having the cylinder 7, a heat insulating material 21 provided in the block 20, and an intake muffler 22 fixed to the block 20. Heat stored by the intake muffler 22 is reduced by isolating the heat of the block 20 using the heat insulating material 21, and refrigerant gas returned back to the closed type compressor from a refrigeration system and low in temperature, is heated by the intake muffler 22 without raising temperature so that refrigerant gas high in density can be sucked in the cylinder 7 to provide high efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used for a refrigerator or the like.

[0002]

2. Description of the Related Art A hermetic compressor used in a refrigerator or the like is required to have high energy efficiency and low operation noise.

In order to reduce the noise while sucking the low-temperature refrigerant gas returning from the refrigeration cycle into the cylinder, there is a hermetic compressor as disclosed in Japanese Patent Application Laid-Open No. 4-219481.

Hereinafter, an example of the conventional hermetic compressor will be described with reference to the drawings.

FIG. 12 is a longitudinal sectional view of a conventional hermetic compressor, FIG. 13 is a cross-sectional view of the conventional hermetic compressor taken along the line AA in FIG. 12, and FIG. It is principal part sectional drawing of a cylinder part.

In FIGS. 12, 13 and 14, reference numeral 1 denotes a sealed container, 2 denotes an electric compression element, and is sealed by a coil spring 5 so that a mechanical portion 3 is located at an upper portion and a motor portion 4 is located at a lower portion. It is elastically supported by the container 1. The mechanical unit 3 includes a cylinder 7, a cylinder head 8, a piston 9, a crankshaft 10, a connecting rod 11, a bearing 12, and the like provided integrally with the block 6. Reference numeral 13 denotes oil, which is stored in the lower part of the closed container 1. Reference numeral 14 denotes a valve plate which has a suction hole 14a and has a cylinder 7
It is arranged on the end face of. The suction hole 14a is the cylinder 7
It communicates with the inside.

A suction muffler 15 is fixed to the block 6. Reference numeral 16 denotes a muffler outlet passage having one end inserted into the cylinder head 8 and the other end having an opening in the suction muffler 15. Reference numeral 17 denotes a suction pipe fixed to the airtight container 1, and reference numeral 18 denotes a close contact coil spring for communicating the suction muffler 15 and the suction pipe 17. Reference numeral 19 denotes an oil flow passage communicating from the lower end to the upper end of the crankshaft 10, and 19a denotes an oil discharge port opened at the upper end of the crankshaft 10.

The operation of the hermetic compressor constructed as described above will be described below.

In FIG. 12, FIG. 13, and FIG. 14, the refrigerant gas returned from the refrigeration cycle (not shown) to the hermetic compressor passes through the suction pipe 17 and the close contact coil spring 18 and is sucked and released into the suction muffler 15. . Next, the refrigerant gas released into the suction muffler 15 is sucked into the cylinder 7 from the muffler outlet channel 16 through the suction hole 14a. For this reason, the low-temperature refrigerant gas returned from the refrigeration cycle is sucked into the cylinder 7 without being mixed with the high-temperature refrigerant gas in the closed vessel 1, and the refrigerant gas density is increased to increase the refrigerant circulation amount, thereby increasing the efficiency. Improve.

On the other hand, the pressure pulsation generated in the cylinder 7 is attenuated by the space of the suction muffler 15 to reduce noise.

When the crankshaft 10 rotates, the oil 13 rises in the oil passage 19 of the crankshaft 10 and is discharged from the oil discharge port 19a.
A part of this lands jumps on the cylinder 7 and the piston 9 to lubricate the sliding part and cool it. And the oil outlet 19a
Most of the oil 13 discharged from the oil tank lands on the closed casing 1 and radiates heat obtained when ascending the oil flow path 19 of the crankshaft 10 by heat exchange with the closed casing 1, and the oil 13 is cooled. Is done. This prevents the compression of the refrigerant gas and the heat generated by the motor unit 4 from being trapped in the closed container 1 and prevents the temperature of the mechanical unit 3 from rising, thereby preventing the cylinder 7 from rising.
In addition to preventing a decrease in efficiency due to an increase in the temperature of the refrigerant gas sucked into the inside, the reliability is improved by preventing a decrease in the viscosity of the oil 13.

[0012]

However, in the above-mentioned conventional construction, the suction muffler 15 is fixed to the block 6 which has been heated to a high temperature due to the compression of the refrigerant gas and the heat generated by the motor unit 4. The refrigerant gas is directly heated by the heat conduction from the compressor, the temperature of the suction muffler 15 rises, and the low-temperature refrigerant gas returned to the hermetic compressor from the refrigeration system is heated in the suction muffler 15 and the gas accompanying the rise in the refrigerant gas temperature High efficiency could not be obtained due to the decrease in density.

[0013] The present invention solves the conventional problem, and insulates the suction muffler from the block to prevent the suction muffler from being directly heated from the block. Accordingly, it is an object of the present invention to provide a hermetic compressor that prevents a rise in the temperature of a suction muffler and obtains high efficiency.

In the above-mentioned conventional structure, the high-temperature oil 13 scattered from the oil discharge hole 19a rises in the oil passage 19 of the crankshaft 10 and lands on the suction muffler 15, so that the suction muffler 15 is Heated, the temperature of the suction muffler 15 rises, and the low-temperature refrigerant gas returned to the hermetic compressor from the refrigeration system is heated in the suction muffler 15, and a high efficiency is obtained due to a decrease in gas density due to a rise in the refrigerant gas temperature. Could not be obtained.

Another object of the present invention is to prevent high-temperature oil discharged from an oil discharge port from splashing on an intake muffler. Accordingly, it is an object of the present invention to provide a hermetic compressor that can prevent a rise in the temperature of a suction muffler and obtain high efficiency.

Further, in the above-mentioned conventional structure, since the high-temperature oil 13 fills the gap between the block 6 and the suction muffler 15, the suction muffler 15 transfers the heat of the block 6 from the entire bottom surface of the suction muffler 15 through the oil 13. receive. Therefore, the suction muffler 15 is heated and the temperature rises, and the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor is heated in the suction muffler 15 and is higher due to a decrease in the gas density due to the rise in the refrigerant gas temperature. Efficiency could not be obtained.

Another object of the present invention is to prevent heating of the suction muffler by allowing oil to flow out without filling the gap between the block and the suction muffler. Accordingly, it is an object of the present invention to provide a hermetic compressor that can prevent a rise in the temperature of a suction muffler and obtain high efficiency.

Further, the above-mentioned conventional structure has an oil outlet 1
After the oil 13 scattered from 9a lands on the cylinder 7 and the suction muffler 15, it flows through the block 6 and the motor unit 3 and is stored in the lower portion of the closed container 1. As a result, the cooling of the oil 13 becomes insufficient and heat is trapped in the closed container 1. As a result, the reliability of the oil 13 decreases due to a decrease in viscosity, and the temperature of the cylinder 7 and the suction muffler 15 increases. High efficiency may not be obtained due to the decrease.

Another object of the present invention is to cool oil that has scattered from an oil discharge port and has landed on a cylinder or a suction muffler, thereby preventing a decrease in oil viscosity, improving reliability, and improving cylinder and suction muffler. An object of the present invention is to provide a hermetic compressor capable of preventing high temperature of a muffler and obtaining high efficiency.

Further, the above-mentioned conventional structure is characterized in that the oil outlet 1
When the oil 13 scattered from 9a is prevented from flying to the suction muffler 13 and the scattered oil 13 is made to fly to the closed container 1, the oil 13 also stops flying in the cylinder 7 and the cylinder 7 is cooled. Insufficiency may cause a decrease in efficiency due to a decrease in gas density due to a rise in intake gas temperature, or a failure to supply oil 13 to sliding parts such as the cylinder 7 and the piston 9, thereby reducing reliability due to poor lubrication.

Another object of the present invention is to make the oil scattered from the oil discharge port fly into a cylinder or a closed container,
It is an object of the present invention to prevent a drop in efficiency due to a decrease in gas density due to a rise in intake gas temperature and a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston by preventing a landing on a suction muffler.

Further, the above-mentioned conventional structure is characterized in that the oil outlet 1
When the oil 13 scattered from 9a is prevented from flying to the suction muffler 15 and the scattered oil 13 is made to fly to the closed container 1, the oil 13 also stops flying in the cylinder 7 and the cylinder 7 is cooled. Insufficiency may cause a decrease in efficiency due to a decrease in gas density due to a rise in intake gas temperature, or a failure to supply oil 13 to sliding parts such as the cylinder 7 and the piston 9, thereby reducing reliability due to poor lubrication.

Furthermore, if the volume of the suction muffler 15 is reduced in order to reduce the splash of the oil 13 on the suction muffler 15, there is a possibility that a sufficient noise reduction effect cannot be obtained and the noise increases.

Another object of the present invention is to allow oil scattered from an oil discharge port to fly to a cylinder or a closed container,
It is an object of the present invention to prevent a drop in efficiency due to a decrease in gas density due to a rise in intake gas temperature and a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston by preventing a landing on a suction muffler.

Another object of the present invention is to reduce the noise by increasing the volume of the suction muffler to attenuate the pressure pulsation generated in the cylinder by the suction muffler.

[0026]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a motor unit which is located vertically below and is a power source, a crankshaft and a piston which are driven by the motor unit above the motor unit. It comprises a mechanical part such as a cylinder, a block having a cylinder, a heat insulating material provided on the block, and a suction muffler fixed to the block via the heat insulating material.

Thus, the suction muffler can be prevented from being heated from the block, and the efficiency can be improved.

Also, the present invention provides a motor unit which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston and a cylinder driven by the motor unit above the motor unit, and a block having a cylinder. And a suction muffler fixed to the block, and an oil splash prevention wall provided between the crankshaft and the suction muffler.

As a result, it is possible to prevent high-temperature oil discharged from the oil discharge port from splashing into the suction muffler, thereby improving efficiency.

Also, the present invention provides a motor unit which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston and a cylinder driven by the motor unit above the motor unit, and a block having a cylinder. And a suction muffler fixed to the block, and an oil groove provided in the block below or around the suction muffler of the block.

Thus, the gap between the block and the suction muffler can be prevented from being filled with oil, and the efficiency can be improved.

Further, the present invention provides a motor unit which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston and a cylinder driven by the motor unit above the motor unit, and a block having a cylinder. And a sealed container that houses the motor and mechanical parts and stores oil, a suction muffler fixed to the block, and an oil receiver fixed to the inner wall surface of the sealed container and inserted under the block. It is configured.

Thus, the reliability and efficiency can be improved by cooling the oil scattered from the oil discharge port and scattered to the cylinder or the suction muffler in the closed vessel.

The present invention also relates to a motor unit which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston and a cylinder which is driven by the motor above the motor unit, and a lower end of the crankshaft. An oil passage communicating with the upper end of the oil passage, an oil outlet opening at the upper end of the crankshaft of the oil passage, a block having a cylinder, and a suction fixed to the block at a position where the upper end is below the oil outlet. It consists of a muffler.

Thus, it is possible to prevent a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston. In addition, it is possible to prevent the temperature of the suction muffler from rising and improve the efficiency.

Further, the cooling of the oil can prevent a decrease in the reliability due to a decrease in the viscosity of the oil.

Further, the present invention provides a motor section which is a power source located vertically below, a mechanical section such as a crankshaft, a piston and a cylinder which is driven by the motor section above the motor section, and a lower end of the crankshaft. An oil passage communicating with the upper end from the oil passage, an oil discharge port opened at the upper end of the crankshaft of the oil passage, a connecting rod having a small end hole and a large end hole, and a block having a cylinder,
It comprises a suction muffler fixed to the block, and an oil scattering wall fixed to the upper surface of the large end hole on the suction muffler side and higher than the upper end of the suction muffler.

Thus, it is possible to prevent a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston. In addition, it is possible to prevent a rise in the temperature of the suction muffler, to improve the efficiency, and to prevent a decrease in reliability due to a decrease in oil viscosity by cooling the oil.

Further, noise can be reduced by attenuating the pressure pulsation generated in the cylinder by the suction muffler.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that a motor unit which is located below the vertical direction and is a power source,
A mechanical unit such as a crankshaft, a piston, and a cylinder driven by the motor unit on the upper side of the motor unit, a block having the cylinder, a heat insulating material provided in the block, and the heat insulating material. It is composed of a fixed suction muffler, and the heat of the suction muffler can be reduced by blocking the heat of the block with a heat insulating material.

Therefore, the low-temperature refrigerant gas returned from the refrigeration system to the closed type compressor is heated by the suction muffler, and the high-density refrigerant gas can be sucked into the cylinder without increasing the temperature. It has the effect of being obtained.

According to a second aspect of the present invention, there is provided a motor unit which is located at a lower side in a vertical direction and is a power source, a crankshaft driven by the motor unit on an upper side of the motor unit,
A piston, a mechanical part such as a cylinder, a block having the cylinder, a suction muffler fixed to the block, and an oil splash prevention wall provided between the crankshaft and the suction muffler, The high-temperature oil that has risen in the flow path and has been discharged from the oil discharge hole is blocked by the oil splash prevention wall, and is prevented from scattering to the suction muffler. This prevents hot oil from splashing onto the suction muffler and prevents the suction muffler from being heated by the oil.

Therefore, the low-temperature refrigerant gas returned from the refrigeration system to the closed type compressor is heated by the suction muffler, and the high-density refrigerant gas can be sucked into the cylinder without increasing the temperature. It has the effect of being obtained.

According to a third aspect of the present invention, there is provided a motor unit located below the vertical direction and serving as a power source, a crankshaft driven by the motor unit above the motor unit,
It comprises a mechanical part such as a piston and a cylinder, a block having the cylinder, a suction muffler fixed to the block, and an oil groove provided in the block below or around the suction muffler of the block. The oil scattered from the oil discharge hole and lands on the block or the suction muffler flows through the oil groove without filling the gap between the block and the suction muffler. Therefore, the heat of the block is prevented from being transmitted to the suction muffler from the entire bottom surface of the suction muffler via the oil, and the suction muffler is prevented from being heated.

Therefore, the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor can be heated by the suction muffler, and the high-density refrigerant gas can be sucked into the cylinder without increasing the temperature. It has the effect of being obtained.

According to a fourth aspect of the present invention, there is provided a motor unit which is located on a lower side in a vertical direction and is a power source, a crankshaft driven by the motor unit on the upper side of the motor unit,
Piston, a mechanical part such as a cylinder, a block having the cylinder, a housing containing the motor part and the mechanical part, a sealed container storing oil, a suction muffler fixed to the block, and It is fixed to the inner wall surface and consists of an oil receiver inserted under the block, and the oil scattered from the oil discharge port and lands on the cylinder or suction muffler and drips from the edge of the block is fixed to the inner wall surface of the sealed container It is guided to the closed container by the oil receiver that has been used. This oil is cooled by performing heat exchange with a closed container cooled by outside air, and becomes a low-temperature, high-viscosity oil that is stored in the lower portion of the closed container. This oil is supplied again to each sliding portion of the mechanical section by the oil flow path, thereby preventing poor lubrication and obtaining high reliability.

Further, by causing the cooled oil to fly to the cylinder portion, the temperature of the cylinder can be prevented from rising, and the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor is heated by the cylinder. A high-density refrigerant gas can be sucked into the cylinder without an increase in temperature, which has the effect of obtaining high efficiency.

According to a fifth aspect of the present invention, there is provided a motor unit which is located on a lower side in the vertical direction and is a power source, a crankshaft driven by the motor unit on the upper side of the motor unit,
A mechanical part such as a piston or a cylinder, an oil flow passage communicating from a lower end to an upper end of the crankshaft, an oil outlet opening at an upper end of the crankshaft of the oil flow passage, a block having the cylinder, A suction muffler is fixed to the block at a position below the oil outlet, and most of the oil scattered from the oil outlet lands on the closed container. As a result, the oil exchanges heat with the closed container cooled by the outside air and is cooled, and becomes a low-temperature, high-viscosity oil, which is stored in the lower portion of the closed container. This oil is supplied again to each sliding portion of the mechanical section by the oil flow path, thereby preventing poor lubrication and obtaining high reliability.

Further, by causing a part of the oil scattered from the oil discharge port to fly to the cylinder portion, it is possible to prevent the temperature of the cylinder from rising and to supply oil to improve reliability.

Further, since the height of the suction muffler is lower than that of the oil discharge port, the high-temperature oil scattered from the oil discharge port jumps over the suction muffler, thereby preventing the high-temperature oil from splashing on the suction muffler. In addition, it is possible to prevent the suction muffler from being heated. As a result, the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor is heated by the suction muffler, and the high-density refrigerant gas can be sucked into the cylinder without increasing the temperature, thereby achieving high efficiency. It has the action of:

According to a sixth aspect of the present invention, there is provided a motor unit which is located below the vertical direction and is a power source, a crankshaft driven by the motor unit above the motor unit,
A piston, a mechanical part such as a cylinder, an oil flow passage communicating from the lower end to the upper end of the crankshaft, an oil discharge port opened at the upper end of the crankshaft of the oil flow passage, a small end hole and a large end hole. A connecting rod having a cylinder, a block having the cylinder, a suction muffler fixed to the block, and an oil scattering wall fixed to an upper surface of the large end hole on the suction muffler side and higher than an upper end portion of the suction muffler, Most of the oil scattered from the oil outlet lands on the closed container. As a result, the oil exchanges heat with the closed container cooled by the outside air and is cooled, and becomes a low-temperature, high-viscosity oil, which is stored in the lower portion of the closed container. This oil is supplied again to each sliding portion of the mechanical section by the oil flow path, thereby preventing poor lubrication and obtaining high reliability.

Further, by causing a part of the oil scattered from the oil discharge port to fly to the cylinder portion, it is possible to prevent the temperature of the cylinder from rising and to supply oil to improve reliability.

A part of the oil scattered from the oil discharge port hits one end of the oil scatter wall and scatters again from the oil scatter wall. At this time, since the height of the oil scattering wall is higher than the suction muffler, by jumping over the suction muffler, it is possible to prevent high-temperature oil from flying to the suction muffler and prevent the suction muffler from being heated. . As a result, the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor is heated by the suction muffler, and the high-density refrigerant gas can be sucked into the cylinder without increasing the temperature, thereby achieving high efficiency. It has the action of:

Further, the suction muffler can be provided in the upper portion of the block and in the entire allowable space of the sealed container without splashing oil, so that the volume of the suction muffler can be increased. Thereby, the pressure pulsation generated in the cylinder can be attenuated by the suction muffler,
It has the effect of obtaining a high noise reduction effect.

[0055]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hermetic compressor according to the present invention will be described below with reference to the drawings. The same components as those of the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 20 denotes a block having the cylinder 7, 21 denotes a heat insulating material provided on the block 20,
Reference numeral 22 denotes a suction muffler fixed to the block 20 via a heat insulating material 21.

The operation of the hermetic compressor configured as described above will be described below.

The compression of the refrigerant gas and the heat generated in the motor unit 4 are conducted to the block 20, and the block 20 becomes high in temperature. However, the heat of the block 20 is blocked by the heat insulating material 21 and the heating of the suction muffler 22 can be reduced, and the temperature rise of the suction muffler 22 can be reduced. Therefore, the low-temperature refrigerant gas returned from the refrigeration system to the hermetic-type compressor is heated by the suction muffler 22 and the high-density refrigerant gas can be sucked into the cylinder 7 without increasing the temperature, and high efficiency is obtained. be able to.

As described above, the hermetic compressor of this embodiment is
Since the block 20 is composed of the block 20 having the cylinder 7, the heat insulating material 21 provided on the block 20, and the suction muffler 22 fixed to the block 20 via the heat insulating material 21, the suction muffler is heated from the block. Can be prevented and efficiency can be improved.

Although the suction muffler 22 is insulated from the block 20 by the heat insulating material 21, for example, the muffler outlet passage 16 is fixed to the cylinder head 8 and the suction muffler 2 is insulated.
The same effect can be obtained even if 2 is separated from the block 20.

(Embodiment 2) FIG. 2 is a vertical sectional view of a hermetic compressor according to a second embodiment of the present invention, and FIG. 3 is a cross-sectional view of the hermetic compressor according to the second embodiment taken along line BB. .

In FIG. 2 and FIG.
24, a suction muffler fixed to the block 23, and 25, an oil splash prevention wall provided between the crankshaft 10 and the suction muffler 24.

The operation of the hermetic compressor constructed as described above will be described below.

The rotation of the crankshaft 10 causes the oil 13 to flow through the oil passage 1 of the crankshaft 10.
Heat is received when ascending 9 and becomes high-temperature oil 13 which is discharged from oil discharge port 19a and scattered. This oil 1
3 is scattered in the direction of the suction muffler 24, but high-temperature oil 1 is applied to the suction muffler 24 by an oil splash prevention wall 25 provided between the suction muffler 24 and the crankshaft 10.
3 is prevented from flying. Thereby, the suction muffler 24 can be prevented from being heated by the oil 13.

Therefore, the low-temperature refrigerant gas returned from the refrigerating system to the hermetic compressor can be heated by the suction muffler 22 and the high-density refrigerant gas can be sucked into the cylinder 7 without increasing the temperature. Efficiency can be obtained.

As described above, the hermetic compressor of the present embodiment
A block 23 having the cylinder 7, a suction muffler 24 fixed to the block 23, and a crankshaft 10
Is formed by the oil splash prevention wall 25 provided between the suction muffler 24 and the intake muffler 24, thereby preventing high-temperature oil discharged from the oil discharge port from splashing into the suction muffler and improving efficiency. be able to.

(Embodiment 3) FIG. 4 is a longitudinal sectional view of a hermetic compressor according to a third embodiment of the present invention, and FIG. 5 is a cross-sectional view of the hermetic compressor of the same embodiment taken along line CC. .

4 and 5, reference numeral 26 denotes the cylinder 7
Is a suction muffler fixed to the block 26, and 28 is an oil groove provided in the block 26 below or around the suction muffler 27 of the block 26.

The operation of the hermetic compressor constructed as described above will be described below.

The rotation of the crankshaft 10 causes the oil 13 to flow through the oil passage 1 of the crankshaft 10.
Heat is received when ascending 9 and becomes high-temperature oil 13 which is discharged from oil discharge port 19a and scattered. This oil 1
After the particles 3 land on the block 26 and the suction muffler 27, they flow through the oil groove 28 and are discharged from the block 26. As a result, the gap between the block 26 and the suction muffler 27 is filled with the oil 13 and the heat of the block 26 is prevented from being transmitted to the suction muffler 27 from the entire bottom of the suction muffler 27 via the oil 13, and the suction muffler 27 is heated. Can be prevented.

Therefore, the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor can be heated by the suction muffler 27 and the high-density refrigerant gas can be sucked into the cylinder 7 without increasing the temperature. Efficiency can be obtained.

Further, the oil 13 is added to the high-temperature block 26.
, The block 26 can be cooled and the temperature of the cylinder 7 can be reduced.

Thus, by sucking the refrigerant gas having a high density into the cylinder, high efficiency is obtained, and at the same time, the viscosity of the oil in the sliding portion between the cylinder 7 and the piston 9 is prevented from decreasing, and high reliability is obtained. be able to.

As described above, the hermetic compressor of this embodiment is
The block 26 includes the cylinder 7, a suction muffler 27 fixed to the block 26, and an oil groove 28 provided in the block 26 below and around the suction muffler 27 of the block 26. Oil can be prevented from filling the gap of the suction muffler, and efficiency can be improved.

(Embodiment 4) FIG. 6 is a longitudinal sectional view of a hermetic compressor according to a fourth embodiment of the present invention as viewed from the front, and FIG. FIG.

6 and 7, reference numeral 6 denotes a block having a cylinder 7, reference numeral 29 denotes a sealed container that stores the motor unit 4 and the mechanical unit 3 and stores oil 13, and reference numeral 30 denotes a suction muffler fixed to the block 6. 15 and an oil receiver fixed to the inner wall surface of the sealed container 29 and inserted below the block 6.

The operation of the hermetic compressor configured as described above will be described below.

The rotation of the crankshaft 10 causes the oil 13 to flow through the oil passage 1 of the crankshaft 10.
Heat is received when ascending 9 and becomes high-temperature oil 13 which is discharged from oil discharge port 19a and scattered. This oil 1
3 lands on the cylinder 7 and the suction muffler 15, hangs down from the edge of the block 6, and is guided to the closed container 29 by an oil receiver 30 fixed to the inner wall surface of the closed container 29. further,
The oil 13 is cooled by performing heat exchange with the closed container 29 cooled by the outside air, and becomes oil 13 having a low temperature and a high viscosity and stored in the lower portion of the closed container 29.

Then, the oil 13 is supplied again to each sliding portion of the mechanical section 3 through the oil flow path 19, thereby preventing poor lubrication and obtaining high reliability.

Further, by causing the cooled oil 13 to fly to the cylinder 7 part, it is possible to prevent the temperature of the cylinder 7 from rising, and the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor is discharged from the cylinder. A high-density refrigerant gas is heated in the cylinder 7 without being heated by the
It can be inhaled, and high efficiency can be obtained.

As described above, the hermetic compressor of this embodiment is
A sealed container 29 containing the block 6 having the cylinder 7, the motor unit 4 and the mechanical unit 3, and storing the oil 13.
And the suction muffler 15 fixed to the block 6 and the oil receiver 30 fixed to the inner wall surface of the sealed container 29 and inserted under the block 6, so that the cylinder scatters from the oil discharge port. By cooling the oil that has landed on the suction muffler in a closed container, reliability and efficiency can be improved.

(Embodiment 5) FIG. 8 is a longitudinal sectional view of a hermetic compressor according to Embodiment 5 of the present invention.

In FIG. 8, reference numeral 19 denotes the crankshaft 1.
0, an oil passage communicating from the lower end to the upper end of the oil passage 19, an oil outlet 19a opened at the upper end of the crankshaft 10 of the oil passage 19, 31 a block having the cylinder 7, 3
Reference numeral 2 denotes a suction muffler fixed to the block 6 at a position where the upper end is below the oil outlet 19a.

The operation of the hermetic compressor configured as described above will be described below.

The rotation of the crankshaft 10 causes the oil 13 to flow through the oil passage 1 of the crankshaft 10.
Heat is received when ascending 9 and becomes high-temperature oil 13 which is discharged from oil discharge port 19a and scattered. Most of the oil 13 scattered from the oil discharge port 19a lands on the closed container 1. As a result, the oil 13 exchanges heat with the closed container 1 cooled by the outside air and is cooled, and becomes oil 13 having a low temperature and a high viscosity and stored in the lower portion of the closed container 1.

Then, the oil 13 is supplied again to the respective sliding portions of the mechanical section 3 by the oil flow path 19, thereby preventing poor lubrication and obtaining high reliability.

Further, a part of the oil 13 scattered from the oil discharge port 19a is made to fly to the cylinder 7 part,
It is possible to prevent the temperature of the cylinder 7 from rising and to supply oil, thereby improving the reliability.

Further, the suction muffler 32 is connected to the oil outlet 1
9a, the high-temperature oil 13 scattered from the oil outlet 19a jumps over the suction muffler 32,
Fly into the closed container 1. Therefore, it is possible to prevent the high-temperature oil 13 from flying to the suction muffler 32, and to prevent the suction muffler 32 from being heated.

As a result, the low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor can be heated by the suction muffler 32 and the refrigerant gas having a high density can be sucked into the cylinder 7 without increasing the temperature. High efficiency can be obtained.

As described above, the hermetic compressor of this embodiment is
An oil passage 19 communicating from the lower end to the upper end of the crankshaft 10, an oil outlet 19a opened at the upper end of the crankshaft 10 of the oil passage 19, a block 31 having the cylinder 7, and an oil outlet 19a at the upper end Since it is constituted by the suction muffler 32 fixed to the block 6 at a lower position, it is possible to prevent a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston. In addition, it is possible to prevent the temperature of the suction muffler from rising and improve the efficiency.

Further, by cooling the oil, it is possible to prevent a decrease in reliability due to a decrease in the viscosity of the oil.

(Embodiment 6) FIG. 9 is a longitudinal sectional view of a hermetic compressor according to a sixth embodiment of the present invention, and FIG. 10 is a sectional view taken along line EE of the hermetic compressor of the embodiment. FIG. 11 is a perspective view of the connecting rod portion of the embodiment.

9, 10 and 11, reference numeral 19 denotes an oil flow passage communicating from the lower end to the upper end of the crankshaft 7, 19a denotes an oil discharge port opened at the upper end of the crankshaft 10 of the oil flow passage 19, and 35 denotes A connecting rod having a small end hole 33 and a large end hole 34, a block 36 having a cylinder 7, a suction muffler 37 fixed to the block 36, a suction muffler 37 fixed to the upper surface of the large end hole 34 on the suction muffler 37 side, and The oil splash wall is higher than the upper end of the muffler 37.

The operation of the hermetic compressor configured as described above will be described below.

When the rank shaft 10 rotates, the oil 13 rises in the crankshaft 10 and receives heat, and becomes high-temperature oil 13 to become the oil discharge port 1.
Emitted from 9 and scattered. Most of the oil 13 scattered from the oil discharge port 19a lands on the closed container 1. As a result, the oil 13 exchanges heat with the closed container 1 cooled by the outside air and is cooled, and becomes oil 13 having a low temperature and a high viscosity and stored in the lower portion of the closed container 1.

Then, the oil 13 is supplied again to each sliding portion of the mechanical section 3 through the oil flow path 19, thereby preventing poor lubrication and obtaining high reliability.

Further, by causing a part of the oil 13 scattered from the oil discharge port 19a to fly to the cylinder 7 part,
It is possible to prevent the temperature of the cylinder 7 from rising and to supply oil, thereby improving the reliability.

The oil 13 scattered from the oil discharge port 19a lands on the oil scattering wall 38 at one end, and scatters again from the oil scattering wall 38. At this time, the oil scattering wall 3
8 is higher than the suction muffler 37, the oil 13
Can prevent the suction muffler 37 from jumping and flying on the suction muffler 37 and prevent the suction muffler 37 from being heated by the oil 13. This allows
The low-temperature refrigerant gas returned from the refrigeration system to the hermetic compressor is heated by the suction muffler 37 and the refrigerant gas having a high density can be sucked into the cylinder 7 without increasing the temperature, and high efficiency can be obtained. it can.

Further, since the suction muffler 37 can be provided in the upper portion of the block and the entire allowable space of the closed container 1 without causing the oil 13 to fly, the suction muffler 37 is provided.
The volume can be increased. Thereby, the pressure pulsation generated in the cylinder 7 can be attenuated by the suction muffler 37, and a high noise reduction effect can be obtained.

As described above, the hermetic compressor of this embodiment is
An oil passage 19 communicating from the lower end to the upper end of the crankshaft 7, an oil outlet 19a opened at the upper end of the crankshaft 10 of the oil passage 19, a connecting rod 35 having a small end hole 33 and a large end hole 34, and a cylinder 7, a suction muffler 37 fixed to the block 36, and an oil scattering wall 38 fixed to the upper surface of the large end hole 34 on the suction muffler 37 side and higher than the upper end of the suction muffler 37. Therefore, it is possible to prevent a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston. In addition, it is possible to prevent the temperature of the suction muffler from rising, thereby improving the efficiency, and to prevent the oil from being cooled and the reliability from being lowered due to the decrease in the viscosity of the oil.

Further, noise can be reduced by attenuating the pressure pulsation generated in the cylinder by the suction muffler.

[0103]

As described above, according to the first aspect of the present invention, there is provided a motor section which is a power source located vertically below, a crankshaft, a piston and a cylinder which are driven by the motor section above the motor section. And the like, a block having a cylinder, a heat insulating material provided on the block, and a suction muffler fixed to the block via the heat insulating material, so that the suction muffler is heated from the block. Can be prevented and efficiency can be improved.

Further, the invention according to claim 2 is characterized in that a motor section which is located below the vertical direction and which is a power source, and a mechanical section such as a crankshaft, a piston and a cylinder which is driven by the motor section above the motor section. Since it is composed of a block having a cylinder, a suction muffler fixed to the block, and an oil splash prevention wall provided between the crankshaft and the suction muffler, the oil is discharged from the oil discharge port to the suction muffler. It is possible to prevent high-temperature oil from splashing and improve the efficiency.

Further, the invention according to claim 3 is characterized in that a motor part which is located below the vertical direction and is a power source, and a mechanical part such as a crankshaft, a piston and a cylinder which is driven by the motor above the motor part. , A block having a cylinder, a suction muffler fixed to the block, and an oil groove provided in the block below or around the suction muffler of the block. Can be prevented from being filled, and the efficiency can be improved.

Further, the invention according to claim 4 is characterized in that a motor section which is located below the vertical direction and is a power source, and a mechanical section such as a crankshaft, a piston and a cylinder which is driven by the motor section above the motor section. A block having a cylinder, a motor unit and a machine unit are housed therein, a sealed container storing oil, a suction muffler fixed to the block, and fixed to the inner wall surface of the sealed container, and inserted into the lower side of the block. Since it is constituted by the oil receiver, the oil scattered from the oil outlet and lands on the cylinder or the suction muffler is cooled in a closed container, so that the reliability and efficiency can be improved.

[0107] Further, the invention according to claim 5 is characterized in that a motor section which is located below the vertical direction and is a power source, and a mechanical section such as a crankshaft, a piston and a cylinder which is driven by the motor section above the motor section. An oil flow path communicating from the lower end to the upper end of the crankshaft, an oil outlet opening at the upper end of the crankshaft of the oil flow path, a block having a cylinder, and a block at a position where the upper end is lower than the oil outlet. Since it is composed of a suction muffler fixed to the cylinder, it is possible to prevent a decrease in reliability due to poor lubrication of sliding parts such as a cylinder and a piston. In addition, it is possible to prevent the temperature of the suction muffler from rising and improve the efficiency.

Further, the oil can be cooled to prevent a decrease in reliability due to a decrease in the viscosity of the oil.

Further, the invention according to claim 6 is characterized in that a motor unit which is located below the vertical direction and is a power source and a mechanical unit such as a crankshaft, a piston and a cylinder which is driven by the motor unit above the motor unit. A block having an oil flow path communicating from the lower end to the upper end of the crankshaft, an oil discharge port opened at the upper end of the crankshaft in the oil flow path, a connecting rod having a small end hole and a large end hole, a cylinder, and a block. It is composed of a suction muffler fixed to the upper end of the large end hole on the suction muffler side and an oil wall higher than the upper end of the suction muffler. It is possible to prevent the property from being lowered. In addition, it is possible to prevent the temperature of the suction muffler from rising, thereby improving the efficiency, and to prevent the oil from being cooled and the reliability from being lowered due to the decrease in the viscosity of the oil.

Further, noise can be reduced by attenuating the pressure pulsation generated in the cylinder by the suction muffler.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a hermetic compressor according to a first embodiment.

FIG. 2 is a longitudinal sectional view of a hermetic compressor according to a second embodiment.

FIG. 3 is a cross-sectional view of the hermetic compressor of the embodiment, taken along the line BB in FIG. 2;

FIG. 4 is a longitudinal sectional view of a hermetic compressor according to a third embodiment.

FIG. 5 is a sectional view of the hermetic compressor according to the embodiment, taken along the line CC in FIG. 4;

FIG. 6 is a longitudinal sectional view of a hermetic compressor according to a fourth embodiment as viewed from the front.

FIG. 7 is a sectional view of the hermetic compressor according to the embodiment, taken along the line DD in FIG. 6;

FIG. 8 is a longitudinal sectional view of a hermetic compressor according to a fifth embodiment.

FIG. 9 is a longitudinal sectional view of a hermetic compressor according to a sixth embodiment.

FIG. 10 is a cross-sectional view of the hermetic compressor according to the embodiment, taken along the line EE in FIG. 9;

FIG. 11 is a perspective view of a connecting rod portion of the embodiment.

FIG. 12 is a longitudinal sectional view of a conventional hermetic compressor.

FIG. 13 is a cross-sectional view of the conventional hermetic compressor, taken along the line AA in FIG.

FIG. 14 is a sectional view of a main part of a cylinder part of a conventional hermetic compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Mechanical part 4 Motor part 6 Block 7 Cylinder 9 Piston 10 Crankshaft 15 Suction muffler 19 Oil flow path 19a Oil discharge port 20 Block 21 Insulation material 22 Suction muffler 23 Block 24 Suction muffler 25 Oil splash prevention wall 26 Block 27 Suction muffler 28 Oil groove 29 Sealed container 30 Oil receiver 31 Block 32 Suction muffler 33 Small end hole 34 Large end hole 35 Connecting rod 36 Block 37 Suction muffler 38 Oil scattering wall

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Akashi 4-5-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Inside Matsushita Refrigerating Machinery Co., Ltd. No.2-5 Matsushita Refrigeration Co., Ltd. F-term (reference) 3H003 AA02 AB03 AC03 BA05 BB03 BD04 BF04 CB02 CE01

Claims (6)

[Claims] 1. A motor unit which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston and a cylinder driven by the motor unit above the motor unit, and a block having the cylinder. A hermetic compressor comprising: a heat insulating material provided on the block; and a suction muffler fixed to the block via the heat insulating material. 2. A motor unit, which is a power source positioned vertically below, a mechanical unit such as a crankshaft, a piston, and a cylinder driven by the motor unit above the motor unit, and a block having the cylinder. A hermetic compressor comprising: a suction muffler fixed to the block; and an oil splash prevention wall provided between the crankshaft and the suction muffler. 3. A motor unit, which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston, and a cylinder driven by the motor unit above the motor unit, and a block having the cylinder. A hermetic compressor comprising: a suction muffler fixed to the block; and an oil groove provided in the block below or around the suction muffler of the block. 4. A motor unit, which is a power source positioned vertically below, a mechanical unit such as a crankshaft, a piston, and a cylinder driven by the motor unit above the motor unit, and a block having the cylinder. A sealed container that houses the motor unit and the mechanical unit and stores oil, a suction muffler fixed to the block, and is fixed to the inner wall surface of the sealed container and inserted under the block. Hermetic compressor consisting of an oil receiver. 5. A motor unit, which is a power source located vertically below, a mechanical unit such as a crankshaft, a piston, and a cylinder driven by the motor unit above the motor unit, and a lower end of the crankshaft. An oil flow path communicating with an upper end, an oil discharge port opened at an upper end of the crankshaft of the oil flow path, a block having the cylinder, and a block having an upper end portion below the oil discharge port. A hermetic compressor consisting of a fixed suction muffler. 6. A motor unit which is located vertically below and is a power source, a mechanical unit such as a crankshaft, a piston and a cylinder which is driven by the motor unit above the motor unit and a lower end of the crankshaft. An oil flow path communicating with an upper end, an oil discharge port opened at an upper end of the crankshaft of the oil flow path, a connecting rod having a small end hole and a large end hole, a block having the cylinder, and fixed to the block A sealed muffler comprising: a suction muffler provided on the side of the suction muffler; and an oil scattering wall fixed to an upper surface of the large end hole and higher than an upper end of the suction muffler.