KR101275921B1 - Hermetic type compressor - Google Patents

Abstract

[assignment]
Provided is a hermetic compressor which can improve the refrigerant gas suction efficiency by minimizing the pressure loss of the refrigerant gas when the refrigerant gas passes through the suction accumulator.
[Solution]
In the hermetic compressor according to the present invention, the suction accumulator includes the elements shown below.
(1) an inlet pipe having a constant inner diameter and to which a refrigerant pipe of a refrigeration cycle is connected;
(2) The whole has a cylindrical shape, both ends of which are narrow in shape, and have a predetermined diameter having a volume that satisfies the function of storing the liquid refrigerant including gas-liquid separated and separated refrigerated oil of the suction refrigerant gas, An end portion having a diffuser shape having a predetermined deployment angle, and a diffuser shape portion formed smoothly in a convex curve inwardly and connected to the inflow pipe;
(3) At least one outlet pipe whose inlet diameter is larger than the diameter of the inlet pipe, or whose inlet is bell-mouse shaped.

Description

Hermetic Compressor {HERMETIC TYPE COMPRESSOR}

The present invention relates to a hermetic compressor. Specifically, it relates to suppression of pressure loss of the suction accumulator.

Conventionally, in order to secure a volume for storing the liquid refrigerant containing the gas-liquid separated and separated refrigeration oil of the intake refrigerant gas, a hermetic type in which the outlet pipe and the inlet pipe reach the inside of the body in a cylindrical body part. A suction accumulator of a compressor is proposed (for example, refer patent document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 2009-162222 (FIG. 8)

The suction accumulator provided with the conventional hermetic compressor having a function of storing the liquid containing the gas-liquid separation and the separated refrigerant oil of the suction refrigerant gas has a volume of the body part and the air conditioner main body which can satisfy the function. Since it is regulated by the pipe diameter and the diameter of the compression chamber suction engaging portion of the compressor, there are problems shown below.

(1) The suction accumulator body part from the inlet pipe of the refrigerant gas which flows from the inlet tube provided in the suction accumulator to the suction accumulator body part and flows into the outlet tube provided in the suction accumulator and is sucked from the compression chamber suction engaging part of the compressor. Sudden loss when entering the stream becomes very large.

(2) The water supply shaft loss at the time of flowing into the said outflow pipe through the suction accumulator body part of the said refrigerant gas becomes very large.

Therefore, the refrigerant gas suction efficiency is lowered, whereby the pressure of the refrigerant gas sucked into the compressor is lowered, and the compression operation is increased than the abnormal pressure state of the refrigeration cycle. As a result, the compressor efficiency is lowered, the pressure of the evaporator provided in the air conditioner body is lowered, and the refrigeration cycle efficiency is lowered.

The present invention has been made to solve the above problems, and provides a hermetic compressor that can improve the refrigerant gas suction efficiency by minimizing the pressure loss of the refrigerant gas when the refrigerant gas passes through the suction accumulator.

The hermetic compressor according to the present invention is a hermetic compressor having a suction accumulator at the side of the hermetic container.

A suction accumulator is provided with the element shown below.

(1) an inflow pipe to which a refrigerant pipe of a refrigeration cycle is connected in a straight pipe having a constant inner diameter;

(2) The whole has a cylindrical shape, both ends of which are narrow in shape, and have a predetermined diameter having a volume that satisfies the function of storing the liquid refrigerant including gas-liquid separated and separated refrigerated oil of the suction refrigerant gas, A fuselage portion having an end portion formed in a diffuser shape having a predetermined deployment angle, the diffuser shape portion being smoothly formed in a convex curve inwardly and connected to the inflow pipe;

(3) At least one outlet pipe whose inlet diameter is larger than the diameter of the inlet pipe, or whose inlet is bell-mouse shaped.

In the hermetic compressor according to the present invention, the inlet pipe of the suction accumulator is configured to have a diffuser shape having an end portion on the inlet pipe side with a predetermined deployment angle, and the diffuser shape portion is smoothly formed in a convex curve inwardly. At the same time, the inlet port has a diameter larger than that of the inlet tube or at least one outlet tube having a bell-mouse shape, thereby reducing the pressure loss of the refrigerant gas when the refrigerant gas passes through the suction accumulator. By minimizing, the refrigerant gas suction efficiency is improved. In addition, the pressure of the refrigerant gas sucked into the hermetic compressor is improved, and the compression operation closes to the abnormal pressure state of the refrigeration cycle, thereby improving the compressor efficiency and improving the refrigeration cycle efficiency by improving the pressure of the evaporator of the refrigeration cycle. It has an effect to make.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows Embodiment 1, and is a longitudinal cross-sectional view which shows the whole structure of the hermetic compressor 100. FIG.
FIG. 2 is a diagram showing Embodiment 1, showing a part of the suction accumulator 1 in cross section. FIG.
3 is an enlarged view of part A of Fig.
FIG. 4 is a diagram showing a first embodiment, showing a part of the suction accumulator 1-1 of the modification in cross section; FIG.
FIG. 5 is a diagram showing Embodiment 1 showing a relationship between an unfolding angle and a pressure loss in a gentle expansion pipe; FIG.
FIG. 6 is a diagram showing Embodiment 1 showing a relationship between an outlet pipe diameter and a pressure loss. FIG.
FIG. 7 is a diagram showing Embodiment 1 and a refrigerant circuit diagram of an air conditioner. FIG.
8 is an exploded perspective view of an outdoor unit 300 of an air conditioner, showing a first embodiment.
9 is a view for comparison, a longitudinal cross-sectional view showing the overall configuration of a general hermetic compressor 200.
FIG. 10 is a view for comparison, showing, in cross section, a portion of a suction accumulator 21 of a typical hermetic compressor 200.

Embodiment Mode 1.

The hermetic compressor of the present embodiment has a volume that satisfies the function of storing the liquid refrigerant including the refrigerant liquid separated from the gas-liquid separated and separated from the suction refrigerant gas from the inflow pipe composed of a straight pipe connected to the air conditioner main body. The suction accumulator body of any diameter leads to a deployment angle having a diffuser effect and a smooth curved shape convex inward, and the inlet is preferably enlarged, and furthermore, the condenser tube at the compression chamber inlet engaging portion of the compression element. It has a suction accumulator provided with at least one piped outflow pipe.

In addition, the hermetic compressor of the present embodiment has a projection shape (stopper) facing inwardly in order to minimize pressure loss while restricting the position of the refrigerant pipe connected to the air conditioner main body to the inlet pipe connected to the air conditioner main body. It is a straight pipe provided with one. The deployment angle with the diffuser effect and the smoothly curved shape convex inwardly have a deployment angle of 10 ° to 60 ° from the inlet pipe outlet to minimize the expansion loss of the refrigerant gas passing therethrough, and smoothly the suction accumulator body. It is connected. The refrigerant gas that has passed through the inner smoothly curved shape minimizes the shrinkage loss when it flows into the inlet of the intake accumulator outlet pipe, and also stores the liquid refrigerant containing the refrigerant oil from which the intake refrigerant gas is separated. In order to be satisfied, the inlet outer diameter of the suction accumulator outlet pipe is larger than the diameter of the suction accumulator inlet pipe, and the outlet pipe reduced in at least one place so as to be a diameter suitable for the compression chamber inlet fitting of the compressor from the inlet diameter of the suction accumulator outlet pipe. It is a hermetic compressor having a suction accumulator having at least one.

In addition, the hermetic compressor of the present embodiment has a bell-mouse shape in order to minimize the water supply shaft loss when the refrigerant gas flows into the outlet pipe at the tip (inlet) of the outlet pipe provided with at least one suction accumulator. An inlet may be sufficient and the bell-mouse shape has an outer diameter larger than the diameter of a suction accumulator inlet pipe.

FIG. 1: is a figure which shows Embodiment 1, and is a longitudinal cross-sectional view which shows the whole structure of the hermetic compressor 100. As shown in FIG. The hermetic compressor 100 will be described with reference to FIG. 1.

The hermetic compressor 100 shown in FIG. 1 is a rotary compressor of one cylinder. The hermetic compressor 100 includes a compression element 101 for compressing a refrigerant and a transmission element 102 for driving the compression element 101 in the hermetic container 110, and is compressed in the bottom of the hermetic container 110. Refrigerated oil is stored that lubricates the slide of the element (101).

As for the compression element 101 which compresses a refrigerant | coolant, the rolling piston which fits in the eccentric part of a rotating shaft rotates the cylinder inside which the both ends of an axial direction were blocked by the upper and lower bearings. In the cylinder, vanes provided freely moving forward and backward in the radial direction are arranged to always abut on the rolling piston. The refrigerant is compressed in the compression chamber surrounded by the inner circumferential surface of the cylinder, the outer circumferential surface of the rolling piston, the vanes, and two bearings.

As the electric element 102 which drives the compression element 101 via the rotating shaft, a brushless DC motor, an induction motor, etc. are used.

The refrigerant compressed by the compression element 101 is discharged into the hermetic container 110, passes through the transmission element 102, and flows out of the discharge tube 130 to the high pressure side of the refrigerant circuit (not shown).

The electric power element 102 is supplied with electric power from a commercial power supply via the glass terminal 120 fixed to the airtight container 110.

The hermetic compressor 100 includes a suction accumulator 1 on its side. This embodiment is characterized by the structure of this suction accumulator 1. Therefore, the suction accumulator 1 is described in detail below.

FIG. 2 is a diagram showing Embodiment 1, showing a part of the suction accumulator 1 in cross section, and FIG. 3 is an enlarged view of portion A in FIG. 1 to 3, the suction accumulator 1 will be described.

The suction accumulator 1 is comprised with the element shown below.

(1) Body part 5: The whole is a cylindrical shape (for example, circular cross section), and is a shape in which both ends are narrowed. The fuselage | body part 5 is comprised by arbitrary diameter which has the volume which satisfies the function which stores the liquid refrigerant containing the gas-liquid separation of the suction refrigerant gas, and the refrigerated oil separated. The edge part of the inflow pipe 2 side mentioned later of the fuselage | body part 5 becomes a diffuser shape. In a diffusion cylinder having a pipe whose cross section is gradually increased, in the case of a subsonic velocity (M <1, M is Mach number), the speed and the Mach number decrease, and the pressure increases. Such a tube is called a diffuser. In addition, the diffuser-shaped part 6 of the fuselage | body part 5 of this embodiment is formed smoothly by the curve (for example, circular arc) convex inward. Although the deployment angle (refer FIG. 2) of the diffuser shape part 6 is mentioned later in detail, 10-60 degrees is preferable. The development angle represents the spread of the cross sectional area. If the cross-sectional area does not change, it is 0 degrees. In addition, like the general suction accumulator 21 shown in FIG. 10, when the cross-sectional area rapidly expands when flowing from the inflow pipe to the body part, the deployment angle is about 180 °.

(2) Inflow pipe (2): A straight pipe having a constant internal diameter, connected to a refrigerant pipe of a unit (for example, an outdoor unit of an air conditioner). From the inlet pipe 2 to the fuselage 5 is smoothly connected to the diffuser shape 6 (development angle (10 ° to 60 °) with a diffuser effect and smoothly curved (e.g. arc)) convex inward). . The inflow pipe 2 is equipped with at least one protrusion part 2a which protrudes inward inside. Pressure loss when the refrigerant gas passes through the inlet pipe 2 while satisfying to regulate (position) the refrigerant pipe of the unit (for example, the outdoor unit of the air conditioner) by the protrusion 2a. Can be minimized. Since the inlet pipe of the general suction accumulator 21 (refer FIG. 10) narrows a part of a straight pipe | tube (it narrows a diameter), and regulates the position of the refrigerant pipe of a unit, the pressure at which refrigerant gas passes through an inlet pipe | tube. There is a loss.

(3) Outflow pipe 3: Outflow part 8 of the outflow pipe 3 of the suction accumulator 1 has a diameter suitable for the compression chamber suction port engaging part 4 of the hermetic compressor 100 (condensed, have). In the outflow pipe 3, the oil return hole 10 for returning the refrigeration oil to the hermetic compressor 100 is opened in the lower part of the body part 5. The diameter of the inflow port 7 of the outflow pipe 3 is larger than the diameter of the inflow pipe 2.

(4) Ring member 9: Fits to the central portion of the trunk portion 5 in a roughly central portion, increases the strength of the trunk portion 5, and fixes the suction accumulator 1 to the sealed container 110. Has a role.

The hermetic compressor 100 is mounted in, for example, an outdoor unit of an air conditioner main body, and refrigerant gas, which is evaporated in a heat exchanger (outdoor heat exchanger (heating) or indoor heat exchanger (cooling)), becomes a gaseous state. A flowing pipe (piping of the unit) is connected to the inlet pipe 2 of the suction accumulator 1 attached to the side of the hermetic compressor 100 (see FIG. 3).

An example of an air conditioner is demonstrated with reference to FIG. 7, FIG.

7 and 8 are diagrams showing Embodiment 1, FIG. 7 is a refrigerant circuit diagram of the air conditioner, and FIG. 8 is an exploded perspective view of the outdoor unit 300 of the air conditioner.

As shown in FIG. 7, the refrigerant circuit of the air conditioner includes a hermetic compressor 100 that compresses the refrigerant, a four-way valve 52 that switches the flow direction of the refrigerant in the cooling operation and the heating operation, and during the cooling operation. The outdoor heat exchanger 53 operating as an evaporator during the condenser and heating operation, the pressure reducing device 54 (electronically controlled expansion valve) for reducing the high-pressure liquid refrigerant to low-pressure gas-liquid two-phase refrigerant, and cooling operation The evaporator at the time of the heating and the indoor heat exchanger 55 operating as the condenser at the time of heating operation are sequentially connected to form a refrigeration cycle.

The solid line arrow in FIG. 7 shows the flow direction of the refrigerant during the cooling operation. In addition, the broken-line arrow of FIG. 7 shows the flow direction of the refrigerant | coolant at the time of a heating operation.

The outdoor side heat exchanger 53 is provided with the outdoor side blower 56, and the indoor side heat exchanger 55 is provided with the indoor side blower 57 (cross flow fan).

During the cooling operation, the high temperature and high pressure refrigerant compressed from the hermetic compressor 100 is discharged and flows into the outdoor heat exchanger 53 through the four-way valve 52. In the outdoor heat exchanger (53), heat is exchanged with the refrigerant while the outdoor air passes between the fin and the tube (heat transfer tube) of the outdoor heat exchanger (53) by the outdoor blower (56) provided in the air path. The refrigerant is cooled to a high pressure liquid state, and the outdoor heat exchanger 53 acts as a condenser. Thereafter, the mixture is depressurized through the decompression device 54 to form a low-pressure gas-liquid two-phase refrigerant, which flows into the indoor heat exchanger 55. In the indoor heat exchanger 55, indoor air passes between the fins of the indoor heat exchanger 55 and the tube (heat transfer pipe) by driving the indoor blower 57 (cross flow fan) attached to the air path. Air is blown into the interior space by the heat exchange with the refrigerant, while the refrigerant receives heat from the air and evaporates to a gaseous state (the interior heat exchanger 55 acts as an evaporator). Then, it returns to the hermetic compressor 100. The indoor space is air-conditioned (cooled) by the air cooled in the indoor-side heat exchanger 55.

In the heating operation, the four-way valve 52 is reversed, so that the refrigerant flows in the reverse direction to the flow of the refrigerant during the cooling operation in the refrigerating cycle, and the indoor heat exchanger 55 serves as the condenser and the outdoor heat exchanger. Group 53 acts as an evaporator. The indoor space is air-conditioned (heated) by the warm air in the indoor heat exchanger 55.

The structure of the outdoor unit 300 of an air conditioner is demonstrated by FIG. The outdoor unit 300 of the air conditioner includes an outline L-shaped outdoor side heat exchanger 53, a bottom plate 68 (base) constituting the bottom of the body of the outdoor unit 300, and a top surface of the body. Flat panel top panel 59, a front L-shaped front panel 60, and a side panel 61 constituting the other side of the body, the air path (blower chamber) Separator 62 for dividing the machine room, electrical appliance box 63 for storing electrical appliances, hermetic compressor 100 for compressing refrigerant, refrigerant piping and refrigerant circuit components 64 for forming a refrigerant circuit, and outdoor heat exchanger ( And the outdoor side blower 56 which blows air to 53).

Compressor efficiency is improved by mounting the closed compressor 100 of the present embodiment to the outdoor unit 300 of the air conditioner configured as described above, thereby making the compression operation close to the abnormal pressure state of the refrigerating cycle. In addition, the pressure of the evaporator provided in the air conditioner body is improved, thereby improving the refrigerating cycle efficiency.

The refrigerant gas passes through the inside of the suction accumulator 1 from the inlet tube 2 of the suction accumulator 1 and passes through the outlet tube 3 of the suction accumulator 1 to the compression chamber suction port engaging portion 4 of the hermetic compressor 100. Inflow into the hermetic compressor (100). In addition, the adiabatic compression in the compression chamber of the hermetic compressor 100 is discharged from the upper discharge pipe 130 connected to the air conditioner main body of the hermetic compressor 100. The discharged refrigerant gas is condensed (outdoor heat exchanger (cooling)) and evaporation (indoor heat exchanger (heating)) by a heat exchanger with ambient air in a heat exchanger inside the air conditioner main body, and once again a closed compressor (100). The cycle which flows in from the inflow pipe 2 of the suction accumulator 1 provided in the side of () is repeated.

In addition, the refrigerant flowing into the suction accumulator 1 is not completely evaporated in the heat exchanger, and the refrigeration oil necessary for lubrication of the mechanical parts (sliding parts) of the compression element 101 stored in the hermetic compressor 100 is adiabaticly compressed. At the time of the process, the mixture is discharged to the refrigerant, whereby the gas refrigerant, the liquid refrigerant, and the coolant oil are mixed.

When a large amount of the liquid refrigerant component in the mixed fluid mixed with the gas refrigerant, liquid refrigerant and freezer oil flows into the compression chamber of the hermetic compressor 100, the refrigerant oil adhered to the mechanical component (sliding component) of the compression element 101 is liquid. It dissolves in the refrigerant, and normal lubrication of the mechanical parts (sliding parts) of the compression element 101 is damaged.

Therefore, the hermetic compressor 100 is equipped with the suction accumulator 1 in the side surface. The suction accumulator 1 separates the mixed fluid of the gas refrigerant, liquid refrigerant, and refrigeration oil introduced into the gas into the gas refrigerant and the liquid refrigerant and the refrigerant air. The gas refrigerant flows into the main body of the hermetic compressor 100 through the outlet pipe 3 of the suction accumulator 1. The liquid refrigerant and refrigeration oil are stored in the body part 5 of the suction accumulator 1 to prevent the liquid refrigerant component from flowing into the compression chamber of the hermetic compressor 100 in a large amount.

In addition, since the stored refrigeration oil is denser than liquid refrigerant and stays in the lower part, only the refrigeration oil is closed from the oil return hole 10 in the lower part of the outlet pipe 3 of the suction accumulator 1. Slowly flow into wealth. The stored liquid refrigerant gradually vaporizes and remains in the upper portion of the suction accumulator 1, and thus flows into the outlet pipe 3 of the suction accumulator 1.

The suction accumulator 1 has any volume which satisfies the function of storing the liquid refrigerant containing the refrigerant liquid separated from the gas-liquid separated and separated from the inlet pipe 2 which is a straight pipe connected to the air conditioner main body. The suction angle of the diameter of the suction accumulator 1 is smoothly connected to the deployment angle having a diffuser effect and an inwardly convex curve (for example, an arc).

The suction accumulator 1 has an outlet tube 3 having a diameter of the inlet 7 larger than the diameter of the inlet tube 2 and having a condensed outlet portion 8 engaged with the compression chamber inlet engaging portion 4. At least one is provided.

The inflow pipe 2 connected to the air conditioner main body (the refrigerant pipe of the unit) is a straight pipe in order to minimize the pressure loss. The diffuser shape 6 having a spreading angle having a diffuser effect and an inwardly convex curve (for example, an arc) minimizes the expansion loss of the refrigerant gas passing therethrough. In addition, in order to form an active flow toward the outer diameter direction of the fuselage part 5 and to make the gas-liquid separation more efficient, it has a deployment angle of 10 ° to 60 ° than the outlet part of the inlet pipe 2, It runs smoothly. Minimize shrinkage loss when the refrigerant gas passing through the diffuser-shaped portion 6 having an inwardly convex curve (for example, an arc) flows into the inlet 7 of the outlet pipe 3 of the intake accumulator 1. In addition, in order to satisfy the function of storing the liquid refrigerant including the refrigerant oil from which the suction refrigerant gas is separated, the inlet 7 of the outlet pipe 3 has an outer diameter larger than the diameter of the inlet pipe 2. The outlet pipe 3 is a compression chamber suction port engaging portion 4 at the end opposite to the inlet port 7 so as to have a diameter suitable for the compression chamber suction port engaging portion 4 from the diameter of the inlet port 7 of the outlet pipe 3. ) Is concentrically piped at at least one of the outlet portions 8 engaged with each other. The suction accumulator 1 is provided with at least one outflow pipe 3.

FIG. 4 is a diagram showing a first embodiment, showing a part of the suction accumulator 1-1 of the modification in cross section. The suction accumulator 1-1 of the modification is different from the suction accumulator 1 shown in FIG. 2 only in the outflow pipe 3-1, and the other is the same. As for the outflow pipe 3-1 of the suction accumulator 1-1 of a modification, the inflow port 7-1 has a bell-mouse shape. By making the inlet 7-1 of the outlet pipe 3-1 into a bell-mouse shape, the gas refrigerant component flows into the outlet pipe 3-1 without damaging its smooth flow.

Next, the operation will be described. In the suction accumulators 1 and 1-1 of this embodiment, the refrigerant gas which flows into the suction accumulator 1 provided in the hermetic compressor 100 from the air conditioner main body by the structure mentioned above is the suction accumulator 1 Smoothly from the inlet pipe (2) provided to the diffuser shape (6) having a deployment angle having a diffuser effect and an inwardly convex curve (for example, an arc) in the fuselage portion (5) of the suction accumulator (1) In this case, passage of the refrigerant gas flow is suppressed to a minimum.

In addition, since active flow toward the outer diameter side of the trunk portion 5 of the suction accumulator 1 can be achieved, gas-liquid separation of the suction refrigerant gas is performed efficiently. The liquid refrigerant component containing the refrigeration oil mimics the outer diameter side of the fuselage part 5 of the suction accumulator 1 and is stored in the lower part of the fuselage part 5 of the suction accumulator 1. The gas refrigerant component is formed with a flow toward the inlet 7 of the outlet pipe 3 provided in the suction accumulator 1 while maintaining a smooth flow.

In addition, the inlet 7 of the outlet pipe 3 provided in the suction accumulator 1 has a circular shape or a bell-mouse shape having an outer diameter larger than the diameter of the inlet pipe 2. Therefore, the gas refrigerant component flows into the outflow pipe 3 without damaging its smooth flow. The inside of the outlet pipe 3 is reduced in size so as to minimize the pipe friction loss and the outlet 8 of the outlet pipe 3 is adapted to the compression chamber inlet engaging portion 4 of the hermetic compressor 100. . Therefore, the smooth flow of the refrigerant gas is maintained and flows into the compression chamber suction port engaging portion 4 of the hermetic compressor 100.

In addition, at least one projection-shaped portion 2a facing inward is provided inside the inflow pipe 2 which is a straight pipe provided in the suction accumulator 1. Therefore, while satisfying regulating the insertion position of the refrigerant pipe connected to the air conditioner main body, it is possible to minimize the pressure loss when the refrigerant gas passes through the inlet pipe 2.

Although the effect of this embodiment is demonstrated, the general hermetic compressor 200 and the suction accumulator 21 are demonstrated first.

9 and 10 are views for comparison, FIG. 9 is a longitudinal sectional view showing the overall configuration of a general hermetic compressor 200, and FIG. 10 is a part of the suction accumulator 21 of the general hermetic compressor 200. It is a figure shown in a cross section.

The general hermetic compressor 200 shown in FIG. 9 differs from the hermetic compressor 100 of FIG. 1 only in the suction accumulator 21. The compression element 201, the electric element 202, the hermetic container 210, the glass terminal 220, the discharge tube 230, and the compression chamber inlet engaging portion 24 of the hermetic compressor 200 are each a hermetic compressor ( It corresponds to the compression element 101, the transmission element 102, the sealed container 110, the glass terminal 120, the discharge tube 130, and the compression chamber suction port engaging part 4 of 100.

The suction accumulator 21 of the general hermetic compressor 200 differs from the suction accumulator 1 of the present embodiment in the following points.

a. The inlet pipe 22 provided in the suction accumulator 21 is inserted into the body part 25 so that an upper volume than the outlet of the inlet pipe 22 of the body part 25 is ineffective from the viewpoint of the refrigerant flow. (See FIG. 10).

b. Since the coolant flow path rapidly expands from the inflow pipe 22 to the body portion 25 (expansion angle approximately 180 °), the sudden enlargement loss is very large.

c. The outlet portion 28 of the outlet pipe 23 is a straight pipe which is not reduced in diameter so as to be suitable for the compression chamber inlet engaging portion 4 of the hermetic compressor 200. Therefore, the smooth flow of the refrigerant gas is disturbed at the compression chamber suction port engaging portion 24 of the hermetic compressor 200.

d. The inflow port 27 of the outflow pipe 23 does not have a bell-mouse shape.

5 and 6 show the first embodiment, FIG. 5 shows the relationship between the unfolding angle and the pressure loss in a gentle expansion pipe, and FIG. 6 shows the relationship between the outlet pipe diameter and the pressure loss. Drawing.

As described above, the suction accumulator 1 of the present embodiment differs from the suction accumulator 21 of the conventional hermetic compressor 200 by the body 5 from the inlet pipe 2 provided in the suction accumulator 1. ) Is smoothly connected to the diffuser-shaped part 6 which has a small deployment angle (10 degrees-60 degrees), and has an inwardly convex curve (for example, circular arc). Therefore, there is no invalid volume as a flow path existing in the suction accumulator 21 of the general hermetic compressor 200. Moreover, since the deployment angle from the inflow pipe 2 to the fuselage | body part 5 is small (10 degrees-60 degrees), a sudden enlargement loss becomes very small (refer FIG. 5).

In addition, the inlet 7 of the outlet pipe 3 provided in the suction accumulator 1 has a circular shape or a bell-mouse shape having an outer diameter larger than the diameter of the inlet pipe 2. Therefore, the water supply shaft loss when the refrigerant gas flows into the inlet 7 of the outlet pipe 3 and the tube friction loss when the refrigerant gas passes through the inside of the outlet pipe 3 are shown in FIG. 6. Very small together.

As described above, the hermetic compressor 100 including the suction accumulators 1 and 1-1 according to the present embodiment has a function of storing a liquid refrigerant containing gas liquid separation and separated refrigerant oil of the suction refrigerant gas. Select the shape of the fuselage part 5, the inflow pipe 2 and the outflow pipe 3 of the suction accumulator 1 in the range which ensures a satisfactory fuselage volume 5, and the deployment angle having the diffuser effect and By smoothly connecting to the diffuser-shaped part 6 which has an inwardly convex curve (for example, circular arc), the pressure loss of the refrigerant gas when the refrigerant gas passes through the suction accumulator 1 is minimized. This improves the refrigerant gas suction efficiency, improves the pressure of the refrigerant gas sucked into the compression chamber inlet engaging portion 4 of the hermetic compressor 100, and makes the compression work close to the abnormal pressure state of the refrigerating cycle. This improves and the pressure of the evaporator provided in the air conditioner main body improves, and it has the effect of improving a refrigeration cycle efficiency.

1: Suction accumulator 1-1: Suction accumulator
2: inlet pipe 2a: protrusion part
3: outflow pipe 3-1: outflow pipe
4 compression chamber suction port engaging portion 5 body portion
6: diffuser shape part 7: inlet
7-1: inlet 8: outlet
9: ring member 10: hole for oil return
21: suction accumulator 22: inlet pipe
23: outlet pipe 24: compression chamber suction port engaging portion
25 body part 27: inlet
28: outlet 52: 4-way valve
53: outdoor side heat exchanger 54: pressure reducing device
55: indoor side heat exchanger 56: outdoor side blower
57: indoor side blower 59: top panel
60: front panel 61: side panel
62: separator 63: electrical box
64: refrigerant piping and refrigerant circuit components 68: bottom plate
100: hermetic compressor 102: electric element
110: hermetic container 120: glass terminal
130: discharge tube 200: hermetic compressor
201: compression element 202: electric element
21: suction accumulator 210: airtight container
220: glass terminal 230: discharge tube
300: outdoor unit

Claims (5)

delete A hermetic compressor having a suction accumulator on the side of a hermetic container,
The suction accumulator,
(1) an inlet pipe having a constant inner diameter and to which a refrigerant pipe of a refrigeration cycle is connected;
(2) The whole is cylindrical in shape, and both ends are narrowed, and it is comprised by the predetermined diameter which has the volume which satisfies the function which stores the liquid refrigerant containing the gas-liquid separation of the refrigerant liquid separated and separated from the suction refrigerant gas, and the said inflow observation The end portion of the fuser is configured in a diffuser shape having a predetermined deployment angle, and the diffuser shape portion is smoothly formed in a convex curve inwardly and connects to the inlet pipe,
(3) the diameter of the inlet port is larger than the diameter of the inlet pipe, or the inlet port has at least one outlet pipe having a bell-mouse shape,
Said inflow pipe protrudes inwardly inside, and has the protrusion shape part which positions the refrigerant pipe of the said refrigeration cycle. A hermetic compressor having a suction accumulator on the side of a hermetic container,
The suction accumulator,
(1) an inlet pipe having a constant inner diameter and to which a refrigerant pipe of a refrigeration cycle is connected;
(2) The whole is cylindrical in shape, and both ends are narrowed, and it is comprised by the predetermined diameter which has the volume which satisfies the function which stores the liquid refrigerant containing the gas-liquid separation of the refrigerant liquid separated and separated from the suction refrigerant gas, and the said inflow observation The end portion of the fuser is configured in a diffuser shape having a predetermined deployment angle, and the diffuser shape portion is smoothly formed in a convex curve inwardly and connects to the inlet pipe,
(3) the diameter of the inlet port is larger than the diameter of the inlet pipe, or the inlet port has at least one outlet pipe having a bell-mouse shape,
The hermetic compressor of the said outlet pipe is condensed so that it may be suitable for the compression chamber suction port engaging part of the said hermetic compressor. 4. The method according to claim 2 or 3,
The said outflow pipe is equipped with the oil return hole for returning refrigeration oil to the said hermetic compressor in the lower part in the said trunk | drum part. 4. The method according to claim 2 or 3,
Said predetermined deployment angle is 10 degrees-60 degrees, The hermetic compressor characterized by the above-mentioned.

Images