KR20210033597A - Compressor and refrigerator having the same - Google Patents

Abstract

The present invention relates to a small compressor and a refrigerator having the same. According to the present invention, the compressor comprises: an electric motor unit which generates driving force; a compression unit which is operated by the driving force transferred from the electric motor unit and which compresses a refrigerant; a shell made of aluminum or aluminum alloy for having an inner space sealed for storing the electric motor unit and the compression unit; and one or more pipes whose one end is engaged with the shell. The pipes are made of different materials from those of the shell, and can be inserted and engaged for the outer circumferential surface of the pipes to directly come in contact with the inner circumferential surface of a pipe connection hole penetrating in the thicknesswise direction of the shell. Accordingly, the small compressor can be easily connected to a suction pipe, discharge pipe, process pipe, etc.

Description

Compressor and refrigerator equipped with it {COMPRESSOR AND REFRIGERATOR HAVING THE SAME}

The present invention relates to a small compressor made of an aluminum shell and a refrigerator having the same.

BACKGROUND ART In general, a refrigerator is a device that keeps stored objects such as food and beverages fresh for a long period of time, and stores the stored objects in a cavity maintained at a freezing or refrigerating temperature depending on the type of storage to be stored.

The refrigerator is operated by driving a compressor provided therein. The cold air supplied to the cavity of the refrigerator is generated by the heat exchange action of the refrigerant, and the cooling cycle of compression, condensation, expansion, and evaporation is repeatedly performed, and the cold air is continuously or intermittently inside the refrigerator according to the increase and decrease of the cavity temperature. Is supplied as. The supplied refrigerant is evenly delivered into the cavity by convection, so that food in the refrigerator can be stored at a desired temperature.

In recent years, not only the demand for traditional cooling efficiency, but also the demand for a small refrigerator that can be mounted on a vehicle or moveable is increasing due to the development of a leisure culture according to an improvement in living standards. The spread of refrigerators for vehicles used after small refrigerators are mounted on vehicles as a fixed type is also increasing. The increase in demand for such a small refrigerator leads to an increase in demand for a small compressor.

The compact compressor as described above, as in Patent Document 1 (Korean Patent Laid-Open Patent No. 10-2016-0131372), constitutes a compression mechanism and outputs the same as or almost similar to that of a large compressor. Accordingly, in order to reduce the weight of the compressor, the shell can be made of a lightweight material such as aluminum.

However, in a conventional compact compressor, when the shell is formed of an aluminum material, it is difficult to couple a suction pipe or a discharge pipe to the shell. That is, conventionally, as the shell is made of iron and the suction pipe and the discharge pipe are made of copper pipe, the suction pipe, the discharge pipe, and the press pipe are directly welded to the shell or an intermediate member made of iron is welded between them. Was to connect. However, when the shell is formed of aluminum, the sealing force of the aluminum shell is lowered during welding, so that it is difficult to connect the suction pipe, the discharge pipe, and the process pipe to the shell by welding.

In addition, in the conventional small compressor, since the heat dissipation area is relatively reduced, heat generated during operation may not be quickly dissipated to the outside of the compressor. As a result, the internal temperature of the compressor increases, and thus the reliability of components in the compressor may decrease, and motor efficiency may decrease.

In addition, in a refrigerator to which a conventional small compressor is applied, a fan must be installed in the machine room of the refrigerator even in order to heat the compressor. However, if the fan is installed in the machine room, the area of the machine room is increased, so that the storage space may be reduced compared to a refrigerator having the same capacity. In addition, as the number of parts increases due to the installation of the fan, the manufacturing cost increases, and the operation time of the fan for dissipating the compressor increases, reducing the refrigerator efficiency and increasing the noise.

Korean Patent Publication No. 10-2016-0131372 (Publication date: 2016.11.16.)

An object of the present invention is to provide a compressor capable of reducing weight by forming a shell of a light material such as aluminum.

Further, it is an object of the present invention to provide a compressor capable of being coupled to a shell by making a suction pipe, a discharge pipe, and a process pipe made of a different material than the shell easily and in close contact with the shell.

Further, an object of the present invention is to provide a compressor in which a suction pipe, a discharge pipe, and a process pipe made of a material different from the shell can be firmly fixed to the shell.

Another object of the present invention is to provide a compact compressor capable of rapidly dissipating heat generated inside a shell.

Further, an object of the present invention is to provide a small compressor capable of minimizing the area occupied by the compressor by reducing the square or dead volume generated by the radiating fins when the radiating fins are installed on the outer surface of the shell.

Another object of the present invention is to provide a refrigerator capable of reducing manufacturing cost as well as expanding the area of a storage space by excluding a fan when a compressor is applied to a refrigerator.

Further, an object of the present invention is to provide a refrigerator capable of increasing refrigerator efficiency and lowering noise by minimizing the operation time of the fan even if a fan is installed.

In order to achieve the object of the present invention, a compressor may be provided for connecting a pipe such as a suction pipe and a discharge pipe or a process pipe to a shell by insert-die casting.

In addition, in order to achieve the object of the present invention, a compressor may be provided in which a pipe made of a copper tube or an iron tube is inserted into an aluminum shell by insert die casting, and an annular protrusion or an annular groove is formed on the outer circumferential surface of the pipe.

In addition, in order to achieve the object of the present invention, the electric unit for generating a driving force; A compression unit that compresses a refrigerant by being operated by a driving force transmitted from the electric unit; A shell made of aluminum or aluminum alloy and having an inner space sealed to accommodate the electric power unit and the compression unit; And at least one or more pipes coupled to the shell; wherein the pipe is formed of a material different from the shell, one end is coupled to pass through the shell, and the other end is coupled to a refrigerant pipe constituting a refrigeration cycle. A compressor may be provided.

Here, the shell has a pipe connection hole penetrating in the thickness direction, and an inner circumferential surface of the pipe connection hole may directly contact the outer circumferential surface of the pipe.

And, between the pipe connection hole and the outer circumferential surface of the pipe may be provided with a separation preventing portion for supporting the pipe in the longitudinal direction.

In addition, the separation prevention part may be formed by extending a support protrusion in a radial direction from an outer circumferential surface of the pipe.

In addition, the separation prevention part may be formed by recessing a support groove in a radial direction from an outer circumferential surface of the pipe.

In addition, the shell may have a uniform thickness.

Further, a reinforcing protrusion may be formed on an outer or inner circumferential surface of the shell to surround the pipe connection hole and extend in a thickness direction of the shell.

Here, a sealing member may be further provided between the shell and the pipe.

In addition, a fixing member may be coupled to an outer circumferential surface of the pipe on an outer or inner surface of the shell, and the sealing member may be provided between the fixing member and an inner or outer surface of the shell facing the fixing member.

Here, the pipe may be insert die cast into the shell.

Here, the pipe may be formed of any one of copper, copper alloy, iron, and iron alloy.

Here, a plurality of heat dissipation fins may be extended and formed on the outer circumferential surface of the shell to dissipate heat generated inside the shell to the outside of the shell.

The plurality of heat dissipation fins each include a curved portion in contact with an outer circumferential surface of the shell, a vertical portion extending in the axial direction from one end of the curved portion, and a horizontal portion extending from the other end of the curved portion and perpendicular to the vertical portion, the The axial end surface of the vertical portion may be formed to be lower than or equal to the upper outer peripheral surface of the shell, and the radial end surface of the horizontal portion may be formed to be lower than or equal to the radial outer peripheral surface of the shell.

In addition, the plurality of radiating fins may have an end surface of a vertical portion and an end surface of a horizontal portion having the same height.

In addition, in order to achieve the object of the present invention, a cavity for storing food; A door opening and closing the cavity; A machine room provided on one side of the cavity and having an air passage formed so that the inner space communicates with the outside; A condenser provided in the machine room; And a compressor provided in the inner space of the machine room at one side of the condenser, wherein the compressor includes the compressor described above.

Here, the radiating fins may be arranged in parallel in a direction toward the condenser.

In addition, the air passage may be formed such that an air inlet forming an inlet and an air outlet forming an outlet are formed at predetermined intervals, and the condenser and the compressor may be provided to be positioned between the air inlet and the air outlet.

In addition, a fan may be further provided between the condenser and the compressor.

In addition, a control unit for controlling the compressor is coupled to the shell of the compressor, and the control unit may be located between the fan and the shell of the compressor.

The small compressor according to the present invention and a refrigerator to which the same is applied can reduce the weight of the compressor by forming a shell made of a light material such as aluminum, thereby reducing the overall weight of a product requiring a small compressor such as a mobile refrigerator.

Further, according to the present invention, by insert-die casting a suction pipe made of a different material from the shell, a discharge pipe, and a pipe such as a process pipe, the pipe can be easily and closely coupled to the shell.

Further, according to the present invention, by forming a support protrusion or a support groove in a pipe such as a suction pipe, a discharge pipe, and a process pipe made of a material different from the shell, the pipe can be firmly fixed while coupling the pipe to the shell by insert die casting.

In addition, in the small compressor according to the present invention and a refrigerator to which the same is applied, the shell of the compressor is formed of an aluminum material, and a plurality of radiating fins is formed on the outer peripheral surface of the shell. Accordingly, even if the compressor is small, an area required for heat dissipation of the compressor can be secured, so that the compressor can be quickly radiated without increasing the driving time of the condensing fan when the refrigerator is installed. In addition, as the compressor heats up quickly, the production cost can be reduced by excluding the condensing fan, or even if the condensing fan is installed, the driving time of the condensing fan can be reduced, thereby reducing power consumption and noise.

Further, in the small compressor according to the present invention and the refrigerator to which the same is applied, since the above-described radiating fins are formed at the corners of the shell, it is possible to increase the heat dissipation effect for the compressor without increasing the size of the compressor including the radiating fins.

In addition, the small compressor according to the present invention and the refrigerator using the same increase the heat dissipation effect by the heat dissipation fin described above, so even if the fan is excluded from the refrigerator to which the compressor is applied or a fan is installed, the operation time of the fan is minimized, thereby increasing the refrigerator efficiency and noise Can be lowered.

1 is a perspective view of a vehicle to which the present embodiment is applied,
2 is an enlarged perspective view of the console of the vehicle according to FIG. 1;
3 is a front view schematically showing the machine room of the small refrigerator according to the present embodiment;
Figure 4 is a perspective view showing the interior of the machine room in Figure 3,
5 is a perspective view showing a small compressor according to the present embodiment,
6 is a cross-sectional view showing the interior of the small compressor according to FIG. 5;
7 is a perspective view showing a discharge pipe according to the present invention separated from a base shell,
8 is a perspective view showing the discharge pipe assembled to the base shell in FIG. 7;
9 is a cross-sectional view taken along the line "V-V" of FIG. 8;
10 is a cross-sectional view showing another embodiment of the reinforcing protrusion in the compressor according to the present invention,
11 is an enlarged cross-sectional view showing a joint portion between a base shell and a discharge pipe according to the present embodiment;
12 is a cross-sectional view showing another embodiment of a coupling structure between a base shell and a discharge pipe according to the present invention;
13 is a cross-sectional view showing another embodiment of a coupling structure between a base shell and a discharge pipe according to the present invention;
14 is a cross-sectional view showing another embodiment of the coupling structure between the base shell and the discharge pipe according to the present invention.

Hereinafter, a small compressor according to the present invention and a refrigerator to which the same is applied will be described in detail with reference to an embodiment shown in the accompanying drawings.

The present embodiment relates to a refrigerator mounted or movable in a vehicle and a small compressor applied to the refrigerator, but the scope of application is not limited thereto. However, in the following, for convenience of description, a small compressor according to the present embodiment and a refrigerator to which the same will be described will be described with reference to a refrigerator mounted on a vehicle.

1 is a perspective view of a vehicle to which this embodiment is applied. Referring to FIG. 1, the vehicle 1 is provided with a seat 2 on which a user can sit. The seats 2 are spaced apart from each other on both left and right sides, and at least one pair may be provided. A console is provided between the seats 2, and the driver puts items necessary for driving or parts necessary for operation of the vehicle are accommodated in the console.

The small refrigerator according to the present embodiment may be located on the console. However, the present invention is not limited thereto, and may be installed in various spaces. For example, it may be installed in the space between the rear seats, the door, the glove box, and the center fascia. This is because the vehicle refrigerator according to the embodiment can be installed if only power is supplied and a minimum space is secured.

FIG. 2 is an enlarged perspective view of the console of the vehicle according to FIG. 1. Referring to FIG. 2, the console 3 may be made of a separate component made of resin or the like. An iron frame 10 is provided on the lower side of the console 3, and a sensor component 11 such as a sensor may be placed in a space between the console 3 and the iron frame 10. The sensor component 11 may correspond to a component that requires accurate external signal sensing and signal measurement at a driver's position. For example, an airbag sensor that is directly connected to the driver's life may be installed.

The console 3 has a console space 4 inside, and the console space 4 can be covered by the console cover 5. The console cover 5 may be fixedly fixed to the console 3. As a result, it is difficult for external foreign substances to enter the console through the console cover 5. A vehicle refrigerator 20 is mounted inside the console space 4.

An air inlet 6 is provided on the right side of the console 3 so that air inside the vehicle can be introduced into the console space 4. The air inlet 6 can look toward the driver. An exhaust port 7 is provided on the left side of the console 3 so that heated air can be exhausted from the inside of the console space 4 during the operation of the vehicle refrigerator. The exhaust port 7 can look toward the auxiliary driver. Grills are provided at the air inlet 6 and the exhaust port 7 to make it difficult for the user to enter, making it safe, preventing objects falling from the top from entering, and directing the exhausted wind downwards to direct people. It can be turned off.

The refrigerator 20 includes a refrigerator floor frame 21 supporting components, a machine room 22 provided on the left side of the refrigerator floor frame 21, and a cavity 23 provided on the right side of the refrigerator floor frame 21. Included. The machine room 22 may be covered by the machine room cover 25, and the upper side of the cavity 23 may be covered by the console cover 5 and the door 24.

The machine room cover 25 guides the flow path of the cooling air and can block the inflow of foreign substances into the machine room. A refrigerator controller 30 is placed above the machine room cover 25 to control the overall operation of the small refrigerator 20.

As the refrigerator controller 26 is installed on the upper side of the machine room cover 25, the small refrigerator 20 can be operated without a problem in an appropriate temperature range in a narrow space inside the console space 4. In other words, the refrigerator controller 26 may be cooled by air flowing through the gap between the machine room cover 25 and the console cover 5, and is separated from the internal space of the machine room 22 by the machine room cover 25. Since it is separated, the heat inside the machine room 22 may not have an effect.

The console cover 5 not only shields the open portion of the upper part of the console space 4, but also shields the upper edge of the cavity 23. A door 24 may be further installed on the console cover 5 in order to allow the user to shield the opening allowing the item to be taken out of the cavity 23. The door 24 may open the rear portion of the console cover 5 and the cavity 23 to a hinge point. Here, the console cover 5, the door 24, and the opening of the cavity 23 are placed horizontally when viewed by the user, and are located at the rear of the console 3, so that the user can conveniently operate the door 24. .

3 is a front view schematically showing the machine room of the small refrigerator according to the present embodiment, and FIG. 4 is a perspective view showing the interior of the machine room in FIG. 3. Referring to FIG. 3, an air inlet 22a is formed on one side of the machine room 22 (left side in the drawing), and an air outlet 22b is formed at the other side of the machine room 22 (right side in the drawing). The air outlet 22b is shown on the right side in the drawing, but is usually formed on the right bottom side. However, for convenience of explanation, the air outlet is shown on the right side.

Inside the machine room 22, a condenser 27, a condensing fan 28, and a compressor 100 are sequentially installed along the flow direction of the cooling air. The condenser 27 may be fastened by a fastening means at the rear of the machine room floor frame 221. The air sucked through the condenser 27 cools the compressor 100 and then flows out to the right or lower right of the compressor 100.

The condensing fan 28 described above is installed between the condenser 27 and the compressor 100. The condensing fan 28 cannot increase the rotational speed indefinitely due to the influence of noise. According to the experiment, it was confirmed that the level of about 2,000 rpm did not affect the driver of the noise.

However, the fan is not necessarily installed. For example, in the case of a refrigerator, if the refrigerant can be condensed only by heat exchange by convection without the condensing fan 28, the condensing fan 28 may not be installed. However, the condensing fan 28 serves to heat the compressor 100 in addition to condensing the refrigerant passing through the condenser 27. Therefore, when heat dissipation to the compressor 100 is smooth, it is not necessary to install the condensing fan 28, or even if it is installed, the operating time can be reduced. This will be described later together with the compressor.

The flow of air in the machine room of the small refrigerator according to the present embodiment as described above is as follows.

That is, the air sucked into the machine room 22 by the condensing fan 28 passes through the condenser 27 to condense the refrigerant. This air cools the compressor 100 and is discharged to the outside after passing through a dryer (not shown) and an expansion valve (not shown). At this time, the flow of air is a flow from the rear of the machine room 22 toward the front. Referring to FIG. 3, the left side is the rear and the right side is the front.

The air cooled by the compressor 100 may be discharged through an air outlet 22b provided in the side of the machine room or the bottom frame 221 of the machine room. Air discharged through the air outlet 22b may be discharged to the outside of the vehicle refrigerator 20 through a flow path guide (not shown) provided in the bottom frame 21 of the refrigerator.

Meanwhile, as described above, the compressor is a small compressor whose shell surface area is reduced by approximately 70% compared to the compressor applied to the existing household refrigerator. Accordingly, motor heat or compression heat generated inside the compressor cannot be radiated smoothly and quickly. Then, the abrasion resistance of the internal components of the compressor may decrease or the efficiency of the motor may decrease.

In addition, in consideration of this, when the condensing fan is provided, the manufacturing cost increases, and when the condensing fan is operated for a long time, the power consumption increases while the fan noise increases, which may cause discomfort to the occupant. Accordingly, the shell of the compact compressor can be made of an aluminum alloy having a light weight and a high heat transfer coefficient as in the present embodiment, thereby increasing the heat dissipation effect. A plurality of heat dissipation fins may be formed on the surface of the shell to further enhance heat dissipation effect. Through this, even if a condensing fan is excluded or a condensing fan is installed, the operating time of the fan can be minimized to increase the efficiency of the refrigerator and increase reliability.

The small compressor 100 is one of the main components constituting a refrigerator, and may be classified into a reciprocating compressor, a rotary compressor, or a scroll compressor according to a driving method. In this embodiment, an example in which a connection-type reciprocating compressor, which is a kind of a reciprocating compressor, is applied will be mainly described. However, the type of compressor is not limited.

5 is a perspective view showing a small compressor according to the present embodiment, and FIG. 6 is a cross-sectional view showing the interior of the small compressor according to FIG. 5. 5 and 6, the compact compressor 100 is provided in the shell 110 forming the exterior, the inner space of the shell 110 and provides a driving force 120, the transmission unit 120 The piston 132 receives a driving force from the cylinder 131 and includes a compression unit 130 for compressing the refrigerant while performing a linear reciprocating motion in the cylinder 131.

The shell 110 forms an enclosed space therein, and accommodates the electric unit 120 and the compression unit 130 in this enclosed space. The shell 110 is made of an aluminum alloy (hereinafter abbreviated as aluminum) that is light and has a high thermal conductivity, and includes a cover shell 111 and a base shell 112.

The cover shell 111 forms an inner space sealed together with the base shell 112 and is formed in an approximately hemispherical shape like the base shell 112. The cover shell 111 is packaged with the base shell 112 on the upper side of the base shell 112 to form a sealed space inside the shell 110.

The cover shell 111 and the base shell 112 may be packaged by welding, but as the cover shell 111 and the base shell 112 according to the present embodiment are made of an aluminum material that is difficult to weld, they may be bolted. .

To this end, the opening surface of the cover shell 111 and the opening surface of the base shell 112 are formed with fastening protrusions 111a and 112a respectively protruding in the radial direction so as to correspond to each other, and each of the fastening protrusions 111a and 112a ) May be formed with a fastening hole (unsigned) for bolt assembly.

The base shell 112 is formed in an approximately hemispherical shape like the cover shell 111. The base shell 112 is equipped with a suction pipe 115, a discharge pipe 116, and a process pipe 117, respectively. The suction pipe 115 introduces the refrigerant into the inner space of the shell 110, the discharge pipe 116 discharges the refrigerant compressed in the shell 110, and the process pipe 117 is It is for charging the refrigerant into the inner space of the shell 110 after the space is sealed, and is mounted through the base shell 112 like the suction pipe 115 and the discharge pipe 116.

Here, the suction pipe 115, the discharge pipe 116, and the process pipe 117 may be coupled to the base shell 111 using an insert die casting method, respectively. This will be described later.

On the other hand, the opening surface of the cover shell 111 and the opening surface of the base shell 112 may be formed to be flat and closely coupled, but the opening surface of the base shell 112 is stepped so that the opening surface of the cover shell 111 And the opening surface of the base shell 112 is stepwise coupled or a groove (not shown) is formed in the opening surface of the base shell 111 and a protrusion provided on the opening surface of the cover shell 112 in the groove (not shown) Is inserted so that both opening surfaces may be unevenly coupled. Accordingly, the sealing area between the opening surface of the cover shell 111 and the opening surface of the base shell 112 is increased, so that even if the cover shell 111 and the base shell 112 are coupled by bolting instead of welding, the internal space is It can be tightly sealed.

Further, although not shown in the drawings, a sealing member (not shown) such as a gasket or an O-ring may be further provided between the opening surface of the cover shell 111 and the opening surface of the base shell 112. Accordingly, the sealing force between the cover shell 111 and the base shell 112 can be further increased.

Meanwhile, a plurality of radiating fins 1191 and 1192 for radiating heat are formed on outer circumferential surfaces of the cover shell 111 and the base shell 112, respectively. However, the heat dissipation fin may not be formed on the outer circumferential surface of the base shell 112, but may be formed only on the outer circumferential surface of the cover shell 111 in consideration of the fact that heat is directed upward. In addition, the radiating fins 1191 and 1192 are formed on the cover shell 111 and the base shell 112, respectively, and the surface area of the radiating fins 1192 formed on the cover shell 111 is formed on the base shell 112 It can be formed to have a larger surface area than (1191).

The radiating fins 1191 and 1192 are formed to extend as a unitary body with the shell 110. A radiating fin formed on the cover shell 111 may be defined as a first radiating fin 1191, and a radiating fin formed on the base shell 112 may be defined as a second radiating fin 1192. The first radiating fins 1191 and the second radiating fins 1192 may be formed identically to each other. Therefore, hereinafter, the first radiating fin will be described as the center.

The first radiating fins 1191 are formed on the cover-side corners 111c of the cover shell 111, and the first radiating fins 1191 are the cover-side corners 111c, the upper side surfaces 111b1, and the side wall surfaces 111b2. Can be formed only up to the point where is connected. In this case, when the cover shell 111 is formed in a semi-spherical shape having a true circle shape and the center of the upper surface of the cover shell 111 is formed of one point, one point may be defined as the upper side portion 111b1.

The first radiating fin 1191 includes a curved portion 1191a extending from the outer circumferential surface of the cover shell 111, a horizontal portion 1191b extending in a direction orthogonal to the axial direction from the top of the curved portion 1191a, and a curved portion. It may be formed of a vertical portion 1191c extending in the axial direction from the lower end of 1191a and connecting the horizontal portion 1191b. Accordingly, the first heat dissipation fin 1191 may be formed such that an edge where the horizontal portion 1191b and the vertical portion 1191c meet has a right angle or an almost right angle.

In addition, as shown in Figure 6, the end surface of the horizontal portion (1191b) forming the axial end surface of the first radiating fin (1191) is formed equal to or lower than the upper surface portion (111b1) that is the upper outer circumferential surface of the cover shell (111), The end surface of the vertical portion 1191c constituting the radial end surface of the first radiating fin 1191 may be formed to be equal to or lower than the side wall surface portion 111b2 that is a side outer peripheral surface of the cover shell 111.

Accordingly, the first radiating fin 1191 is not formed on the upper side portion 111b1 and the sidewall portion 111b2, but is formed only at the corner portion 111c. Then, while forming the radiating fins 1191 on the outer circumferential surface of the cover shell 111, the actual size of the compressor does not increase. That is, when the outer surface of the cover shell 111 is formed in an approximately hemispherical shape, the edge portion becomes a kind of dead angle area or a dead volume area, and the first radiating fin 1191 is a rectangular area. Or, as it is formed only in the corner portion, which is a dead volume area, a new dead area or dead volume is not generated due to the radiating fins.

Here, the rectangular area or the dead volume area means an empty space in the machine room, and when the radiating fins are protruding from the upper side or the side wall, the actual outer surface of the compressor becomes the end surface of the radiating fin. Then, the machine room must be widened by the area of the heat dissipation fin formed to protrude from the upper side or side wall of the cover shell, so this area becomes a rectangular area or a dead volume area. However, as in the present embodiment, an additional rectangular area or dead volume area does not occur at the edge of the shell. Accordingly, the compressor according to the present embodiment does not increase the actual size of the compressor including the radiating fins while forming the radiating fins.

The electric unit 120 includes a stator 121 that is elastically supported and installed in the inner space of the shell 110, a rotor 122 that is rotatably installed inside the stator 121, and a rotor 122 It may include a crankshaft 123 that is coupled to the center of and transmits the rotational force to the compression unit 120.

The compression unit 130 comprises a cylinder block 131 forming a cylinder 131a, a piston 132 compressing a refrigerant while reciprocating in a radial direction inside the cylinder 131a, and one end of the piston 132 The connecting rod 133 is rotatably coupled and the other end is rotatably coupled to the crankshaft 123 to convert the rotational motion of the electric unit 120 into a linear motion of the piston 132, and the cylinder block 131 A valve assembly 134 coupled to the end of the valve assembly 134 having a suction valve and a discharge valve, a suction muffler 135 coupled to the suction side of the valve assembly 134, and a discharge side of the valve assembly 134 It may include a head cover 136 and a discharge muffler 137 communicating with the head cover 136 to attenuate discharge noise of the refrigerant.

The compact compressor according to the present embodiment as described above operates as follows.

That is, when power is applied to the electric unit 120, the rotor 122 rotates. When the rotor 122 rotates, the crankshaft 123 coupled to the rotor 122 rotates and transmits the rotational force to the piston 132 through the connecting rod 133. The piston 132 reciprocates in the front-rear direction with respect to the cylinder 131a by the connecting rod 133.

For example, when the piston 132 moves backward from the cylinder 131a, the internal volume of the cylinder 131a increases, and when the internal volume of the cylinder 131a increases, the refrigerant filled in the internal space of the shell 110 is sucked. It is sucked into the cylinder 131a of the cylinder block 131 through the muffler 135.

Conversely, when the piston 132 advances from the cylinder 131a, the internal volume of the cylinder 131a decreases, and when the internal volume of the cylinder 131a decreases, the refrigerant filled in the cylinder 131a is compressed and the valve assembly 134 ) Is discharged to the head cover 136 through the discharge valve. The refrigerant is discharged to the refrigeration cycle through the discharge muffler 137 and repeats a series of processes.

At this time, motor heat is generated while generating rotational force in the electric unit 120, and compression heat is generated while compressing the refrigerant in the compression unit 130. The motor heat and the compression heat are cooled by heat exchange with refrigerant or oil sucked into the inner space of the shell 110, and the refrigerant and oil are in contact with the inner circumferential surface of the shell 110 and are cooled by heat exchange with the shell 110. Accordingly, heat generated in the inner space of the shell 110 is eventually radiated to the interior of the machine room 22 through the surface of the shell 110.

Accordingly, the heat dissipation effect of the compressor may be determined by the material and surface area of the shell 110. As the shell 110 is formed of an aluminum material having a high thermal conductivity, as described above, the heat dissipation effect may be increased. However, as the compressor has been miniaturized, the heat dissipation area, that is, the surface area, has been significantly reduced by about 70% compared to the compressor applied to the existing home refrigerator. Accordingly, even if the material of the compressor is changed to an aluminum material that is advantageous for heat dissipation, the heat dissipation effect of the compressor may be reduced as the overall heat dissipation area is reduced.

Accordingly, as described above, a plurality of radiating fins are formed on the outer circumferential surface of the shell to expand the radiating area. Through this, even if the compressor is miniaturized, the radiating area of the shell is secured to increase the heat dissipation effect.

However, when the radiating fins are evenly formed on the entire outer circumferential surface of the shell, the actual size of the compressor defined as the end surface of the radiating fin is increased than the outer circumferential surface of the shell. Then, the advantages obtained while miniaturizing the compressor can be greatly impaired. Therefore, it is preferable to form a radiating fin, but to reduce the square or dead volume by the radiating fin as much as possible so that the actual size of the compressor including the radiating fin is not increased.

Meanwhile, as described above, the small compressor according to the present embodiment may be installed in a machine room in a small refrigerator. In this case, the small compressors may be arranged in the order of condenser-condensing fan-compressor.

At this time, an air inlet 22a is formed on the left side of the machine room 22, and an air outlet 22b is formed on the right side or the right bottom side, respectively. Then, the condenser 27 may be disposed at a position close to the air inlet 22a and the compressor 100 may be disposed at a position close to the air outlet 22a of the machine room 22. As described above, since the compressor 100 is less affected by air than the condenser 27 due to its characteristics, even if it comes into contact with air having a higher temperature than the condenser 27, the refrigerator performance is not significantly affected. However, when the compressor 100 is small as in the present embodiment, the heat dissipation area may be reduced, so that the heat dissipation effect for the compressor may be lowered, and thus the operating time of the condensing fan 28 may be increased.

However, as in the present embodiment, when the shell 110 is formed of an aluminum material and the radiating fins 1191 and 1192 are formed on the outer circumferential surface of the shell 110, even if the compressor is small, the area required for heat dissipation of the compressor is secured. can do. Through this, the compressor 100 can be quickly radiated without increasing the driving time of the condensing fan 28 in order to radiate the compressor 100. Then, it is possible to prevent power wasted due to the long-time driving of the condensing fan 28, and noise due to driving of the condensing fan 28 can be reduced.

Furthermore, one end of the radiating fins 1191 and 1192 in the longitudinal direction may be arranged to face the condenser 27. In this case, the air passing through the condenser 27 may evenly contact the radiating fins 1191 and 1192 while passing through the radiating fins 1191 and 1192. In addition, since the flow resistance of air due to the radiating fins 1191 and 1192 is reduced, new air can be quickly introduced into the machine room 22. Accordingly, the heat dissipation effect for the condenser 27 and the compressor 100 may be further improved.

However, the radiating fins 1191 and 1192 may be arranged in a direction orthogonal to the direction toward the condenser 27 horizontally and perpendicularly or radially as described above. Further, the radiating fins 1191 and 1192 may be arranged in a direction orthogonal to the flow direction of air.

In these cases, not only the area of the radiating fins is enlarged, but the air passing through the condenser 27 may collide with the radiating fins 1191 and 1192 due to the complicated shape of the radiating fins, thereby forming turbulent flow. Then, the air forms a complex flow distribution in the machine room 22, so that the contact property between the air and the radiating fins 1191 and 1192 may be improved.

Meanwhile, the small compressor according to the present embodiment may be provided with a compressor control unit 150 for controlling the electric unit 120 inside the shell 110.

Referring back to FIGS. 3 and 4, the compressor control unit 150 may be coupled to a side surface of the base shell 112. In addition, the compressor control unit 150 may generate higher heat than the shell 110. Therefore, it may be preferable that the compressor control unit 150 is located between the condensing fan 28 and the compressor 100.

Meanwhile, as described above, a suction pipe, a discharge pipe, and a process pipe are respectively coupled to the base shell. These pipes are connected to the refrigerant pipe of the refrigeration cycle or provided alone. In particular, the suction pipe or discharge pipe connected to the refrigerant pipe is made of a copper pipe, a copper alloy pipe, an iron pipe or an iron alloy pipe, whereas the base shell is made of aluminum. Accordingly, in the present invention, the suction pipe and the discharge pipe can be combined by insert die casting without welding to the base shell. Hereinafter, a discharge pipe coupled to the base shell will be described as a representative example.

7 is a perspective view showing the discharging pipe according to the present invention separated from the base shell, FIG. 8 is a perspective view showing the discharging pipe assembled to the base shell in FIG. 7, and FIG. 9 is a cross-sectional view of “V-V” of FIG. to be.

7 to 9, the base shell 112 is formed with a pipe connection hole 112b penetrating in the thickness direction. However, the pipe connection hole 112b is not formed in advance before coupling the discharge pipe 116, but is formed in the process of coupling the discharge pipe 116 by insert die casting. However, for convenience of explanation, it is assumed that the pipe connection hole 112b is formed in the base shell 112. Of course, in the case of post-assembling the discharge pipe 116 as in the embodiment of FIG. 14 to be described later, it is natural that the pipe connection hole 112b is formed in advance in the base shell 112.

The discharge pipe 116 has its outer circumferential surface in close contact with the inner circumferential surface of the pipe connection hole 112b. This is because the discharge pipe 116 is bonded to the base shell 112 by insert die casting using the fact that the discharge pipe 116 is formed of a copper tube or an iron tube and has a higher melting temperature than the aluminum base shell 112. . That is, after the discharge pipe 116 made of a copper tube or an iron tube is put in a predetermined mold, an aluminum melt is injected into the mold at high pressure to fill the mold. Then, the aluminum melt is in close contact with the outer circumferential surface of the discharge pipe 116 while filling the predetermined mold. Then, the discharge pipe 116 can be firmly coupled to the base shell 112 without welding.

However, when the outer circumferential surface of the discharge pipe 116 is formed in a flat smooth tube shape, it may be removed after the discharge pipe 116 is coupled to the base shell 112. Accordingly, in the present embodiment, a separation prevention part may be formed between the outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b corresponding thereto.

Referring to FIGS. 7 and 9, a separation prevention part for supporting the pipe in the longitudinal direction is formed on the outer circumferential surface of the discharge pipe 116 according to the present embodiment. The separation prevention part may be made of a support protrusion 116a extending in the radial direction from the outer circumferential surface of the discharge pipe 116.

The support protrusion 116a may be formed by pressing or welding a separate member on the outer circumferential surface of the discharge pipe 116, or formed by inserting the discharge pipe 116 between the jig and compressing it on both sides and processing a part of the outer circumferential surface to wrinkle. You may. In addition, a method in which the support protrusion 116a can be formed on the outer circumferential surface of the discharge pipe 116 is sufficient.

The support protrusion 116a and the support groove 112c may each be formed in an annular shape so as to correspond to each other. The outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b are formed unevenly by the support protrusion 116a and the support groove 112c. Accordingly, the contact area between the outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b can be enlarged. Then, the sealing area between the outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b is enlarged, so that the inner space of the shell can be more reliably sealed.

However, the support protrusion 116a and the support groove 112c may be formed of a plurality of protrusions having a predetermined spacing along the circumferential direction. In this case, the support protrusion 116a and the support groove 112c may be relatively diverse and easily formed.

In addition, aluminum forming the base shell 112 is filled between the support protrusions formed along the circumferential direction and the support grooves. Accordingly, it is possible to suppress the strength of the base shell 112 from weakening due to the support protrusion and the support groove, so that the strength of the shell can be maintained without increasing the thickness of the base shell 112.

On the other hand, when the support protrusion 116a is formed in the discharge pipe 116, the thickness of the base shell 112 may be reduced by the thickness of the support protrusion 116a at the position where the support protrusion 116a is formed. Then, the reliability of the base shell 112 may be deteriorated.

Accordingly, in the base shell 112 according to the present embodiment, a reinforcing protrusion may be formed at a position where the support protrusion 116a is formed. 7 to 9 again, the outer circumferential surface of the base shell 112 is formed with a reinforcing protrusion 112d that surrounds the pipe connection hole 112b and extends in the thickness direction of the shell. In the drawings, the reinforcing protrusions 112d may be formed on the outer circumferential surface of the base shell 112, but may be formed on the inner circumferential surface of the base shell 112 in some cases.

When the reinforcing protrusion 112d is formed on the outer circumferential surface of the base shell 112, the internal space of the shell can be secured to prevent collision with other members, and the reinforcing protrusion 112d is the inner circumferential surface of the base shell 112 If it is formed in, the size of the compressor can be reduced that much. 7 to 9 show examples in which the reinforcing protrusions according to the present embodiment are formed on the outer circumferential surface of the shell.

The reinforcing protrusion 112d is formed in an annular shape. However, the reinforcing protrusion 112d is not necessarily formed in an annular shape. That is, since the reinforcing protrusion 112d compensates for the thinning of the shell due to the support protrusion 116a of the discharge pipe 116, it may be formed in various shapes such as an arc if only the stability of the shell can be secured.

In addition, the reinforcing protrusion 112d may be formed in multiple stages. 10 is a cross-sectional view showing another embodiment of the reinforcing protrusion in the compressor according to the present invention.

Referring to FIG. 10, the reinforcing protrusion 112d according to the present embodiment may be formed in two stages. For example, in the reinforcing protrusion 112d, the first reinforcing protrusion 112d1 and the second reinforcing protrusion 112d2 may be continuously stepped. In this case, the first reinforcing protrusion 112d1 close to the outer circumferential surface of the base shell 112 has a larger diameter than the second reinforcing protrusion 112d2 relatively far from the outer circumferential surface of the base shell 112. In other words, the diameter of the second reinforcing protrusion 112d2 is formed smaller than the diameter of the first reinforcing protrusion 112d1. Accordingly, while the length of the reinforcing protrusion 112d in the pipe direction increases, the volume of the reinforcing protrusion 112d is greatly increased.

Meanwhile, the reinforcing protrusion 112d described above may be excluded in some cases. 11 is an enlarged cross-sectional view showing a joint portion between a base shell and a discharge pipe according to the present embodiment.

Referring to FIG. 11, the thickness t of the base shell 112 may be formed as thick as the support protrusions 116a are formed on the outer circumferential surface of the discharge pipe 116. Then, the thickness t of the base shell 112 may be uniform and thick as a whole. Then, even if the support protrusion 116a is formed in the discharge pipe 116, the thickness t of the base shell 112 at a position corresponding to the support protrusion 116a can be secured.

Meanwhile, in the above-described embodiments, the separation preventing portion may be formed to protrude from the outer circumferential surface of the discharge pipe 116, but the separation preventing portion may be formed to be recessed in the outer circumferential surface of the discharge pipe 116. 12 is a cross-sectional view showing another embodiment of a coupling structure between a base shell and a discharge pipe according to the present invention.

Referring to Figure 12, the separation prevention unit according to the present embodiment, at least one support groove (116b) is formed on the outer circumferential surface of the discharge pipe (116), the support groove (116b) of the pipe connection hole (112b). The support protrusion 112e protruding from the inner circumferential surface may be inserted.

The support groove 116b may cut the outer circumferential surface of the discharge pipe 116 by machining, or may press-mold the discharge pipe 116 using a swaging machine. Accordingly, the support groove 116b is formed to be recessed in the radial direction, may be formed in an annular shape, or may be formed in an arc shape.

When the support groove 116b is formed on the outer circumferential surface of the discharge pipe 116 as described above, the aluminum melt is filled into the support groove during insert die casting, so that the discharge pipe 116 can be supported in the longitudinal direction.

Then, it is possible to prevent the base shell 112 from being damaged without forming a separate reinforcing protrusion 112d on the base shell 112.

In addition, in FIG. 12, a case where there are a plurality of support grooves 116b is described as an example, but in some cases, the number of support grooves 116b may be reduced to one or a minimum. Then, the thickness of the base shell 112 may be made thinner. This can further reduce the weight of the compressor.

Meanwhile, in the above-described embodiments, a case where a separate sealing member is not provided has been described as the discharge pipe 116 is coupled to the base shell 112 by insert die casing. However, in some cases, a sealing member 195 may be further provided between the base shell 112 and the discharge pipe 116.

13 is a cross-sectional view showing another embodiment of a coupling structure between a base shell and a discharge pipe according to the present invention.

Referring to FIG. 13, one end of the discharge pipe 116 may be formed to penetrate the inner circumferential surface of the pipe connection hole 112b of the base shell 112 and extend inward than the inner circumferential surface of the base shell 112. Here, since the discharge pipe 116 is coupled to the base shell 112 by insert die casting, the outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b can be closely contacted.

In addition, as in the above-described embodiments, a separation prevention part (a support protrusion is shown as an example in the drawing) [(116a) (112c)] [(116b) (112e)] is formed on the outer circumferential surface of the discharge pipe 116 Accordingly, a relatively wide sealing area can be secured between the outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b.

However, during the insert die casting process, the outer circumferential surface of the discharge pipe 116 and the inner circumferential surface of the pipe connection hole 112b may be spaced apart. In consideration of this, a sealing member 195 may be further provided between the base shell 112 and the discharge pipe 116.

For example, the fixing member 196 may be screwed to one end of the discharge pipe 116 located inside the base shell 112 with the sealing member 195 interposed therebetween. Here, the fixing member 196 does not necessarily need to be fastened. In some cases, it may be press-fitted or welded to the discharge pipe 116.

The sealing member 195 may be formed in a gasket shape as shown in FIG. 13, or may be formed of an O-ring in some cases. The sealing member 195 may be in close contact with the inner circumferential surface of the base shell 112 by the fixing member 196.

Accordingly, it is possible to seal between the inner circumferential surface of the base shell 112 and the outer circumferential surface of the discharge pipe 116, and through this, the refrigerant or oil filled in the inner space of the shell is transferred to the inner circumferential surface of the base shell 112 and the discharge pipe 116 It can suppress leakage between the outer circumferential surfaces of.

Meanwhile, although not shown in the drawings, the sealing member may be excluded and the fixing member may be in close contact with the inner circumferential surface of the base shell 112 to increase the sealing force. In this case, the fixing member is formed in a flange shape with a sealing portion, so that a wide sealing area can be secured.

Meanwhile, the discharge pipe 116 may be post-assembled to the base shell 112. 14 is a cross-sectional view showing another embodiment of a coupling structure between a base shell and a discharge pipe according to the present invention.

Referring to FIG. 14, a pipe connection hole 112b is formed in the base shell 112. Unlike the above-described embodiment, the pipe connection hole 112b in this embodiment is formed in advance in the base shell 112.

The inner diameter of the pipe connection hole 112b may be formed to be greater than or equal to the outer diameter of the discharge pipe 116. However, since the discharge pipe 116 is post-assembled, the inner diameter of the pipe connection hole 112b is preferably formed larger than the outer diameter of the discharge pipe 116.

As shown in FIG. 14, the base shell 112 is coupled to the discharge pipe using a fixing member 196 from the inside of the base shell 112, and discharged using the support protrusion 116a of the discharge pipe 116 from the outside of the base shell 112. The pipe 116 can be supported in the longitudinal direction. In addition, although not shown in the drawings, the fixing members may be coupled to both the inner and outer peripheral surfaces of the base shell 112, respectively.

In this case, it may be preferable that the support protrusion 116a is formed such that the surface facing the base shell 112 has a larger cross-sectional area than that of the opposite surface.

And, although not shown in the drawing, as the inner diameter of the pipe connection hole 112b is formed larger than the outer diameter of the discharge pipe 116, between the inner peripheral surface of the base shell 112 and one side of the fixing member 196 facing it , A sealing member may be provided between the outer circumferential surface of the base shell 112 and one side surface of the support protrusion 116a facing it.

As described above, as the discharge pipe 116 is post-assembled to the base shell 112, the discharge pipe 116 can be easily assembled without a separate mold operation. In addition, as the discharge pipe 116 is post-assembled to the base shell 112, various materials of the discharge pipe 116 can be selected.

Claims (18)

An electric unit generating a driving force;
A compression unit that compresses a refrigerant by being operated by a driving force transmitted from the electric unit;
A shell made of aluminum or aluminum alloy and having an inner space sealed to accommodate the electric power unit and the compression unit; And
Including; at least one or more pipes one end is coupled to the shell,
The pipe is formed of a different material with the shell, and is inserted and coupled so that the outer circumferential surface of the pipe directly contacts the inner circumferential surface of the pipe connection hole penetrating in the thickness direction of the shell. The method of claim 1,
A compressor having a separation preventing portion for supporting the pipe in a longitudinal direction between the pipe connection hole and the outer circumferential surface of the pipe. The method of claim 2,
The departure prevention unit,
A compressor formed by extending a support protrusion in a radial direction from an outer circumferential surface of the pipe. The method of claim 2,
The departure prevention unit,
Compressor formed by recessing the support groove in the radial direction from the outer circumferential surface of the pipe. The method of claim 1,
Compressor in which the thickness of the shell is formed to be constant. The method of claim 1,
A compressor having a reinforcing protrusion formed on an outer or inner circumferential surface of the shell to surround the pipe connection hole and extend in a thickness direction of the shell. The method of claim 1,
A compressor further comprising a sealing member between the shell and the pipe. The method of claim 7,
A fixing member is coupled to the outer circumferential surface of the pipe on the outer or inner surface of the shell,
A compressor having the sealing member provided between the fixing member and an inner or outer surface of the shell facing the fixing member. The method according to any one of claims 1 to 8,
The pipe is an insert die-casting compressor in the shell. The method of claim 9,
The pipe is a compressor formed of any one of copper, copper alloy, iron, and iron alloy. The method of claim 1,
A compressor formed by extending a plurality of radiating fins on an outer circumferential surface of the shell to dissipate heat generated from the inside of the shell to the outside of the shell. The method of claim 11,
Each of the plurality of radiating fins
A curved portion in contact with the outer circumferential surface of the shell, a vertical portion extending in the axial direction from one end of the curved portion, and a horizontal portion extending from the other end of the curved portion and perpendicular to the vertical portion,
The axial end surface of the vertical part is formed to be lower than or equal to the upper outer circumferential surface of the shell,
The radial end surface of the horizontal portion is formed to be lower than or equal to the radial outer peripheral surface of the shell. The method of claim 12,
The plurality of radiating fins is a compressor in which an end surface of a vertical portion and an end surface of a horizontal portion are formed at the same height. A cavity for storing food;
A door opening and closing the cavity;
A machine room provided on one side of the cavity and having an air passage formed so that the inner space communicates with the outside;
A condenser provided in the machine room; And
Includes; a compressor provided in the inner space of the machine room at one side of the condenser,
The compressor is a refrigerator comprising the compressor according to claim 11. The method of claim 14,
The heat dissipation fins are arranged in parallel in a direction toward the condenser. The method of claim 15,
The air passage is formed with an air inlet forming an inlet and an air outlet forming an outlet at predetermined intervals,
The condenser and the compressor are provided to be located between the air inlet and the air outlet. The method of claim 16,
A refrigerator, characterized in that further provided with a fan between the condenser and the compressor. The method of claim 17,
A control unit for controlling the compressor is coupled to the shell of the compressor,
The control unit is a refrigerator positioned between the fan and the shell of the compressor.

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