KR102652595B1 - Scroll compressor - Google Patents

Abstract

A scroll compressor is disclosed. The scroll compressor includes a block housing between the fixed scroll and the rear housing, and the block housing may be provided with a discharge passage, a variable capacity passage, and an injection passage. Through this, the capacity of the compression chamber can be lowered or conversely increased, allowing operation in various bands. In addition, by simplifying the structure of the fixed scroll and the arrangement of the valves, the compressor can be miniaturized and its manufacturing cost can be reduced.

Description

Scroll compressor{SCROLL COMPRESSOR}

The present invention relates to a scroll compressor provided with a variable capacity passage and an injection passage.

In general, a heat pump refers to a device that cools and heats an indoor space through the compression, condensation, expansion, and evaporation processes of refrigerant. When cooling a room, the indoor heat exchanger acts as an evaporator through which low-temperature, low-pressure refrigerant passes, while the outdoor heat exchanger acts as a condenser through which high-temperature, high-pressure refrigerant passes. Conversely, when heating a room, the indoor heat exchanger acts as a condenser, while the outdoor heat exchanger acts as an evaporator.

Heat pumps are broadly divided into electric heat pumps (EHP: Electric Heat Pump), which use an electric motor to drive the compressor, and gas engine heat pumps (GHP: Gas Engine Heat Pump), which use the combustion energy of fuel gas to drive the compressor. can be distinguished.

There is little difference in the entire heat pump system, including the compressor, between an electrically driven heat pump and a gas engine heat pump. However, there is a slight difference in that electric heat pumps are driven by electricity, which is secondary energy, and gas engine heat pumps are driven by gas, which is primary energy.

Gas engine heat pumps can utilize the heat generated from the combustion of primary energy for heating, so their heating efficiency is higher than electric heat pumps. In addition, it has the effect of suppressing electricity demand for cooling in the summer, making it a cooling method that is consistent with the national energy policy.

Gas engine heat pumps mainly use horizontal scroll compressors. The horizontal scroll compressor consists of an open scroll compressor in which the driving source, a gas engine, is placed externally and the compression mechanism operated by the gas engine is installed inside the casing. This is explained by defining it as a scroll compressor for GHP.

Like other scroll compressors, the scroll compressor for GHP is equipped with a capacity variable device to change the capacity of the compression chamber. For example, the capacity of the compression chamber can be lowered by providing a bypass passage that removes refrigerant from the middle of the compression chamber, or the capacity of the compression chamber can be increased by providing an injection passage that injects refrigerant into the middle of the compression chamber.

Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-095637) shows an example in which bypass holes for variable capacity are provided with a phase difference of 180° to balance both compression chambers in a scroll compressor with different wrap heights.

Patent Document 2 (United States Published Patent US2015/192124 A) shows an example in which a valve block is provided between the fixed scroll and the rear housing, and an injection passage is provided through the valve block.

However, the conventional scroll compressor as described above has limitations in diversifying the capacity of the compressor because it is provided only with a bypass passage that lowers the capacity of the compressor or with only an injection passage that increases the capacity of the compression chamber.

In addition, in the conventional scroll compressor, it is difficult to provide both a bypass passage and an injection passage due to space constraints, and manufacturing costs may increase due to an increase in the number of parts. That is, due to the nature of the scroll compressor having two pairs of compression chambers, when a bypass passage and an injection passage are provided together, a plurality of valves must be provided to open and close these passages, including the bypass passage and the injection passage, respectively. However, due to space constraints within the compressor, it is not easy to properly arrange these passages and valves, which may cause the fixed scroll to become enlarged or the structure of the fixed scroll and valve arrangement to become complicated, thereby increasing manufacturing costs.

Japanese Patent Laid-Open No. 2008-095637 (Publication date: 2008.04.24.) US published patent US2015/192124 A (Published date: 2015.07.09.)

The purpose of the present invention is to provide a scroll compressor that can vary the capacity of the compression chamber.

Furthermore, the purpose of the present invention is to provide a scroll compressor that can vary the capacity of the compressor by providing both a capacity variable passage (bypass passage) to lower the capacity and an injection passage to increase the capacity.

Furthermore, the purpose of the present invention is to provide a scroll compressor that can miniaturize the compressor and reduce manufacturing costs by simplifying the arrangement structure of the valves forming the variable capacity passage and the injection passage without increasing the size of the fixed scroll.

In order to achieve the purpose of the present invention, the scroll compressor may include a casing, a orbiting scroll, a fixed scroll, a block housing, a discharge passage, a variable capacity passage, and an injection passage. The casing has a main housing and a rear housing coupled to one end of the main housing, and the internal space is divided into a suction space and a discharge space, and the suction space is connected to one end of a refrigerant circulation pipe forming a refrigeration cycle, the The discharge space may be connected to the other end of the refrigerant circulation pipe. The orbiting scroll may perform a orbital movement inside the casing. The fixed scroll is provided in the inner space of the casing to engage with the orbiting scroll to form a pair of compression chambers, and penetrates between one side forming the pair of compression chambers and the other side opposite thereto. A plurality of holes may be formed. The block housing is provided between the other side of the fixed scroll and the inner side of the casing facing it to distribute the plurality of holes. The discharge passage part is provided in the block housing and can guide the refrigerant in the compression chamber to move toward the discharge space. The capacity variable passage part is provided in the block housing and can guide the refrigerant in the compression chamber to move toward the suction space. The injection passage part is provided in the block housing to guide the refrigerant in the refrigerant circulation pipe to move from the outside of the casing toward the compression chamber. Through this, the capacity of the compression chamber can be lowered or conversely increased, allowing operation in various bands. In addition, by simplifying the structure of the fixed scroll and the arrangement of the valves, the compressor can be miniaturized and its manufacturing cost can be reduced.

For example, the plurality of holes may include a discharge hole formed at the center of the fixed scroll and a first bypass hole formed around the discharge hole. The discharge passage portion may include a discharge receiving groove and a discharge guide hole. The discharge receiving groove may be formed to accommodate both the discharge port and the first bypass hole. The discharge guide hole may be formed to penetrate the block housing from inside the discharge receiving groove toward the discharge space. Through this, the discharge path of the discharge port and the first bypass hole can be unified, thereby simplifying the structure of the block housing provided between the fixed scroll and the rear housing.

Specifically, the discharge receiving groove may include a plurality of discharge guide grooves recessed to a preset depth on one side of the block housing facing the fixed scroll, extending in the radial direction. Each end of the plurality of discharge guide grooves may be connected to each other at the center of the block housing. A discharge guide hole may be formed in one or more of the plurality of discharge guide grooves. The discharge guide hole may be formed eccentrically at the other end of the discharge guide groove. Through this, it is possible to secure free space in the block housing by unifying the discharge paths of the discharge ports and the first bypass hole that are spaced apart from each other and minimizing the area occupied by the discharge paths of these holes.

As another example, the plurality of holes may include a second bypass hole connected to the capacity variable passage part. The capacity variable passage portion may include a capacity variable groove and a capacity variable hole. The capacity variable groove is formed to accommodate the second bypass hole, and the capacity variable hole may extend from the capacity variable groove toward the suction space. Through this, the capacity variable passage portion communicating with the second bypass hole can be formed in the block housing together with the discharge passage portion and the injection passage portion.

Specifically, the capacity variable groove may be recessed to a preset depth on one side of the block housing facing the fixed scroll. One end of the capacity variable hole communicates with the capacity variable groove, and the other end may penetrate into the other side of the block housing. Through this, the variable capacity passage portion communicating with the second bypass hole can be formed in the block housing while simplifying the structure of the variable capacity passage portion.

More specifically, a plurality of second bypass holes may be formed to communicate with each of the two pairs of compression chambers. The capacity variable grooves may be formed in plural numbers spaced apart from each other to accommodate each of the plurality of second bypass holes. The capacity variable hole may be formed in plural numbers so as to communicate with each of the plurality of capacity variable grooves. On the other side of the block housing, a capacity variable guide groove may be formed in a long groove shape so that the plurality of capacity variable holes communicate with each other. Through this, a plurality of capacity variable holes communicating with both compression chambers can be integrated and connected to one bypass port.

More specifically, a first compartment protrusion may extend toward the block housing on the inner surface of the rear housing facing the block housing. The capacity variable guide groove may be covered by the first compartment protrusion and separated from the discharge space. A bypass port penetrating between the inner and outer peripheral surfaces of the rear housing may be formed in the first compartment protrusion. The bypass port may have one end communicating with the capacity variable guide groove and the other end communicating with the suction space. Through this, by unifying and connecting a plurality of capacity variable holes to one bypass port, the bypass port as well as the refrigerant recovery piping structure connected to the bypass port can be simplified.

As another example, the plurality of holes may include injection holes connected to the injection passage part. The injection passage portion may include an injection receiving groove, an injection connection hole, and an injection guide hole. The injection receiving groove may be recessed to a preset depth on the other side of the block housing facing the rear housing. The injection connection hole may be provided on one side of the injection receiving groove and connected to the refrigerant circulation pipe. The injection guide hole may be provided on the other side of the injection receiving groove and connected to the injection hole. Through this, the injection passage communicating with the injection hole can be formed in the block housing together with the discharge passage and the capacity variable passage.

Specifically, the plurality of injection guide holes may be provided so that the plurality of injection guide holes can communicate with each other in the injection receiving groove. Through this, the structure of the injection passage portion can be simplified by integrating a plurality of injection passages.

Specifically, one side of the injection receiving groove facing the rear housing is covered by an injection cover, and the injection connection hole may be formed through the injection cover. An injection valve that opens and closes the injection connection hole may be provided on one side of the injection cover facing the injection receiving groove. Through this, the injection valve can be easily installed in the block housing forming the injection passage.

More specifically, a second compartment protrusion extending toward the injection cover is formed on the inner surface of the rear housing facing the block housing, and the second compartment protrusion penetrates between the inner surface and the outer surface of the rear housing. An injection port may be formed. The injection port may have one end connected to the injection connection hole and the other end connected to the middle of the refrigeration cycle outside the casing. Through this, a plurality of injection passages are unified and connected to one injection port, thereby simplifying the injection port as well as the injection piping structure connected to the injection port.

Additionally, an injection sealing groove extending beyond the inner diameter of the injection guide hole may be formed at an end of the injection guide hole facing the fixed scroll. An injection sealing protrusion extending toward the block housing may be formed on one side of the fixed scroll facing the block housing. The injection sealing protrusion may be supported in a radial direction when inserted into the injection sealing groove. Through this, when assembling the block housing to the fixed scroll, not only can the block housing be easily aligned to the assembly position while excluding separate parts such as reference protrusions and reference grooves, but also the block housing can be stably fixed without a separate fastening member. there is.

Specifically, a sealing member may be provided between the injection sealing protrusion and the injection sealing groove. Through this, it is possible to suppress the refrigerant in the discharge space from flowing into the compression chamber through the relatively low-pressure injection passage, thereby suppressing the suction loss through the injection passage.

As another example, the plurality of holes may include injection holes connected to the injection passage part. The injection passage portion may include an injection receiving groove and an injection connection hole. The injection receiving groove may be formed to accommodate the injection hole by being recessed by a predetermined depth on one side of the block housing facing the fixed scroll. The injection connection hole may be provided on one side of the injection receiving groove and connected to the refrigerant circulation pipe. Through this, the open surface of the injection receiving groove is covered by the fixed scroll, thereby eliminating the injection cover to cover the injection receiving groove, lowering the assembly cost, and at the same time, the injection valve is placed close to the injection hole, preventing the body from being removed from the injection passage. You can reduce enemies.

Specifically, an injection sealing protrusion surrounding the injection hole and extending toward the block housing may be formed on one side of the fixed scroll facing the block housing. The injection sealing protrusion may be supported in a radial direction when inserted into the injection receiving groove. Through this, when assembling the block housing to the fixed scroll, not only can the block housing be easily aligned to the assembly position while excluding separate parts such as reference protrusions and reference grooves, but also the block housing can be stably fixed without a separate fastening member. there is.

Specifically, a plurality of injection holes may be formed to communicate with each pair of compression chambers. The injection receiving groove and the injection connection hole may each be formed in plural numbers to correspond to the plurality of injection holes. On the other side of the block housing facing the rear housing, an injection communication groove may be formed so that the plurality of injection connection holes communicate with each other. Through this, a plurality of injection passages communicating with both compression chambers can be integrated and connected to one injection port.

More specifically, a second compartment protrusion extending toward the injection communication groove and covering the injection communication groove may be formed on the inner surface of the rear housing facing the block housing. An injection port penetrating between the inner and outer surfaces of the rear housing may be formed in the second compartment protrusion. The injection port may have one end connected to the injection connection hole and the other end connected to the middle of the refrigeration cycle outside the casing. Through this, the ends of the plurality of injection connection holes are unified and connected to one injection port, thereby simplifying the injection port as well as the injection piping structure connected to the injection port.

As another example, the scroll compressor may be provided with a capacity control valve that selectively opens and closes the capacity variable passage portion and an injection control valve that selectively opens and closes the injection passage portion. The capacity control valve and the injection control valve may be respectively provided in a pipe connected to the capacity variable passage and a pipe connected to the injection passage from the outside of the casing. Through this, not only can the capacity control valve and injection control valve be easily installed, but it can also be advantageous for maintenance. In addition, through this, the operating range of the compressor can be diversified by selectively performing a capacity variable operation that lowers the capacity of the compression chamber or an injection operation that increases the capacity of the compression chamber.

The scroll compressor according to the present invention includes a block housing between the fixed scroll and the rear housing, and the block housing may be provided with a discharge passage, a variable capacity passage, and an injection passage. Through this, the capacity of the compression chamber can be lowered or conversely increased, allowing operation in various bands. In addition, by simplifying the structure of the fixed scroll and the arrangement of the valves, the compressor can be miniaturized and its manufacturing cost can be reduced.

In the scroll compressor according to the present invention, a discharge receiving groove accommodating the discharge port and the first bypass hole is formed on one side of the block housing, and the discharge guide hole communicating with the discharge receiving groove penetrates the block housing toward the discharge space. You can. Through this, the discharge path of the discharge port and the first bypass hole can be unified, thereby simplifying the structure of the block housing provided between the fixed scroll and the rear housing.

In the scroll compressor according to the present invention, a capacity variable groove connected to the second bypass hole is formed on the front surface of the block housing, and the capacity variable hole connected to the capacity variable groove may extend toward the suction space of the casing. there is. Through this, the capacity variable passage portion communicating with the second bypass hole can be formed in the block housing together with the discharge passage portion and the injection passage portion.

In the scroll compressor according to the present invention, a capacity variable guide groove may be formed in the shape of a long groove on the rear surface of the block housing so that a plurality of capacity variable holes that respectively communicate with a plurality of capacity variable grooves communicate with each other. Through this, a plurality of capacity variable holes communicating with both compression chambers can be integrated and connected to one bypass port.

In the scroll compressor according to the present invention, an injection receiving groove is formed on the rear surface of the block housing and is covered with an injection cover, and the injection receiving groove can be connected to the injection hole and injection port through an injection connection hole and an injection guide hole. Through this, the injection passage communicating with the injection hole can be formed in the block housing together with the discharge passage and the capacity variable passage.

In the scroll compressor according to the present invention, the injection sealing protrusion formed on the fixed scroll can be supported in the radial direction where it is inserted into the injection sealing groove provided in the block housing. Through this, when assembling the block housing to the fixed scroll, not only can the block housing be easily aligned to the assembly position while excluding separate parts such as reference protrusions and reference grooves, but also the block housing can be stably fixed without a separate fastening member. there is.

In the scroll compressor according to the present invention, an injection receiving groove may be formed on one side of the block housing facing the fixed scroll, and an injection connection hole may be formed to penetrate from the injection receiving groove to the other side of the block housing. Through this, the open surface of the injection receiving groove is covered by the fixed scroll, thereby eliminating the injection cover to cover the injection receiving groove, lowering the assembly cost, and at the same time, the injection valve is placed close to the injection hole, preventing the body from being removed from the injection passage. You can reduce enemies.

1 is a schematic diagram showing a gas engine heat pump according to this embodiment.
Figure 2 is a perspective view showing the interior of the compressor in Figure 1 broken away.
Figure 3 is an assembled cross-sectional view of Figure 2.
Figure 4 is an enlarged cross-sectional view of a portion of Figure 3.
Figure 5 is an exploded perspective view of a part of the compressor in Figure 2 seen from the front side.
Figure 6 is a plan view of Figure 5 seen from the front of the fixed scroll.
Figure 7 is a plan view of Figure 5 from the front of the block housing.
Figure 8 is an exploded perspective view of a part of the compressor in Figure 2 seen from the rear side.
Figure 9 is a plan view of Figure 8 seen from the rear of the block housing.
FIGS. 10A and 10B are cross-sectional views showing the movement of refrigerant depending on the operation mode in the compressor according to this embodiment, with FIG. 10A showing the capacity variable mode and FIG. 10B showing the injection mode.
Figure 11 is a perspective view showing another embodiment of the block housing from the front.
Figure 12 is a perspective view of another embodiment of the block housing from the rear.
Figure 13 is a cross-sectional view showing a part of the compressor including the block housing of Figures 11 and 12 assembled.

Hereinafter, a scroll compressor according to the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

The scroll compressor according to the present invention will be described with a focus on the horizontal scroll compressor that constitutes a typical air conditioning refrigeration cycle along with a condenser, expander, and evaporator in a gas engine heat pump. However, the compressor according to the present invention is not necessarily applied only to horizontal scroll compressors, but can also be applied to vertical scroll compressors.

In addition, the scroll compressor according to the present invention will be described focusing on the example of a gas engine heat pump in which the oil recovery device is provided outside the compressor. However, the oil recovery device may be provided inside the compressor.

Additionally, the scroll compressor according to the present invention can be classified into an integrated housing or an assembled housing depending on the assembly method of the housing forming the casing. For example, an integrated housing is a structure in which the main housing and rear housing are manufactured as a single piece, and an assembled housing is a structure in which the main housing and rear housing are assembled. This embodiment is explained using an assembled housing as an example. However, the capacity variable device, which will be described later, can be equally applied to the integrated housing.

1 is a schematic diagram showing a gas engine heat pump according to this embodiment.

Referring to FIG. 1, the gas engine heat pump 1 according to this embodiment is configured such that the compressor 10, the condenser 20, the expander 30, and the evaporator 40 form a closed loop. That is, the condenser 20, expander 30, and evaporator 40 are sequentially connected to the discharge side of the compressor 10, and the evaporator 40 is connected to the suction side of the compressor.

Additionally, an oil separator 50 that separates oil from the refrigerant may be provided on the discharge side of the compressor 10, that is, between the compressor 10 and the condenser 20. The gas outlet side of the oil separator (50) is connected to the refrigerant circulation pipe (70) connected to the condenser (20), and the oil outlet side of the oil separator (50) is connected to the oil return pipe (51) facing the suction side of the compressor (10). do.

Additionally, a gas-liquid separator 60 may be provided between the outlet of the expander 30 and the inlet of the evaporator 40 to separate the liquid refrigerant and the gas refrigerant. For example, the expander 30 includes a first expander 31 and a second expander 32 connected in series, and a gas-liquid separator 60 is provided between the first expander 31 and the second expander 32. It can be.

In this case, the liquid refrigerant outlet of the gas-liquid separator 60 is a refrigerant circulation pipe 70 connected to the second expander 32, and the gas outlet of the gas-liquid separator 60 is an injection pipe ( 61) are connected respectively. Accordingly, the refrigerant discharged from the compressor 10 and passing through the condenser 20 is expanded in the first expander 31 and separated into liquid refrigerant and gas refrigerant in the gas-liquid separator 60, and the liquid refrigerant is divided into a refrigerant circulation pipe 70. ) moves to the second expander 32 and is sucked into the compressor 10 through the evaporator 40, while the gas refrigerant is injected into the compressor 10 through the injection pipe 61.

In the drawing, reference numeral 2 is a clutch assembly, 11 is a refrigerant recovery pipe, 12 is a capacity variable control valve, 52 is an oil recovery control valve, and 62 is an injection control valve.

In the gas engine heat pump (1) as described above, the refrigerant compressed in the compressor (10) is discharged through the discharge port (1411) and/or the first bypass hole (1412) to be described later, and this refrigerant is discharged from the condenser (20). It first passes through the oil separator 161 located on the upstream side. The refrigerant and oil are separated in the oil separator 161, and the refrigerant goes through a refrigeration cycle consisting of a condenser 20, an expander 30, and an evaporator 40 in order and is sucked back into the compressor 10, while the oil is sucked back into the refrigeration cycle. It is directly recovered from the oil separator 161 to the compressor 10 through the oil return pipe 162 without passing through.

However, the oil return pipe 162 may be connected (joined) to the refrigerant suction pipe 115 and connected to the suction side of the compressor 10, but as described above, this increases the specific volume of the refrigerant sucked into the compression chamber (V). The volumetric efficiency of the compressor may decrease. Accordingly, the point where the oil return pipe 162 is connected to the casing is as far away as possible from the point where the refrigerant suction pipe 115 is connected to the casing, and the axial bearing between the front housing 112 and the orbiting scroll 130, which will be described later, is maintained. It is advantageous to be arranged so as to effectively lubricate the surface.

Meanwhile, a second bypass hole 1413, which will be described later, is formed on the suction side of the first bypass hole 1412 in the fixed head plate portion 141, which will be described later, and an injection hole 1414, which will be described later, is a second bypass hole. (1413) is formed on the suction side. The second bypass hole 1413 is a hole for flowing out refrigerant from both compression chambers (V1) (V2), and the injection hole 1414 is a hole for flowing refrigerant into both compression chambers (V1) (V2). .

When lowering the capacity of the compression chamber (V), the second bypass hole 1413 is opened so that part of the refrigerant compressed in the compression chamber (V) is bypassed out of the compression chamber (V), and this bypassed refrigerant is recovered to the suction space 110a of the compressor 10, which will be described later, through the refrigerant return pipe (or oil return pipe) 11. On the other hand, when increasing the capacity of the compression chamber (V), the gas separated from the liquid refrigerant is discharged through the injection hole 1414 to the outside of the compression chamber (V), precisely between the condenser 20 and the evaporator 40 of the refrigeration cycle. Refrigerant is injected into both compression chambers (V1) (V2) through the injection pipe (61).

Figure 2 is a perspective view showing the inside of the compressor broken away in Figure 1, Figure 3 is an assembled cross-sectional view of Figure 2, Figure 4 is an enlarged cross-sectional view of a part of Figure 3, and Figure 5 is a part of the compressor in Figure 2. It is an exploded perspective view seen from the front side, Figure 6 is a plan view of Figure 5 seen from the front of the fixed scroll, Figure 7 is a plan view of Figure 5 seen from the front of the block housing, and Figure 8 is a rear view of a part of the compressor in Figure 2. It is an exploded perspective view shown in, and Figure 9 is a plan view of Figure 8 seen from the rear of the block housing.

As shown in these drawings, the scroll compressor 10 according to this embodiment includes a casing 110, a drive shaft 120, an orbiting scroll 130 forming a compression section, a fixed scroll 140, and a block housing 150. Includes. The block housing 150 is provided between the fixed scroll 140 and the rear housing 113, which will be described later, and forms a discharge passage 151, a variable capacity passage 152, and an injection passage 153, which will be described later. .

2 to 4, the casing 110 according to this embodiment includes a main housing 111, a front housing 112, and a rear housing 113.

The casing 110 forms the exterior of the compressor 10 and is disposed on one side of the clutch assembly 2 and coupled to the clutch assembly 2 by the drive shaft 120. Hereinafter, the side facing the clutch assembly 2 will be defined as the front, and the side opposite to it will be defined as the rear. Accordingly, the front housing 112 refers to a housing disposed on the side facing the clutch assembly 2, and the rear housing 113 refers to a housing disposed on the opposite side.

The main housing 111 is formed in a cylindrical shape with openings at both ends to accommodate the compressed portion. In other words, the internal space of the main housing 111 forms a suction space 110a where the refrigerant that has passed through the evaporator 40 is sucked in. However, the suction space of the main housing 111 forms an oil sump in which not only the refrigerant but also the oil that lubricates the sliding part including the compression part is stored.

One end (front end) of the main housing 111 is covered by combining the front housing 112, and the other end (rear end) of the main housing 111 is covered by combining the rear housing 113. Accordingly, the internal space of the main housing 111 is sealed by the front housing 112 and the rear housing 113.

A first connection protrusion (not indicated) and a second connection protrusion (not indicated) are formed on the outer peripheral surface of the main housing 111. A refrigerant suction port 1111 is formed on the first connection protrusion (not denoted), and a return port 1112 is formed on the second connection protrusion. The refrigerant suction port 1111 and the return port 1112 are formed by penetrating between the outer and inner surfaces of the main housing 111, respectively.

The outer end of the refrigerant suction port 1111 is connected to the refrigerant suction pipe 115, and the inner end of the refrigerant suction port 1111 opens to the inner peripheral surface of the main housing 111. Accordingly, the refrigerant suction pipe 115 communicates with the internal space of the casing 110, that is, the suction space 110a, through the refrigerant suction port 1111.

The outer end of the return port 1112 is connected to the refrigerant recovery pipe (or oil return pipe) 151, and the inner end of the return port 1112 opens to the inner peripheral surface of the main housing 111. Accordingly, the refrigerant suction pipe 115 communicates with the internal space of the casing 110, that is, the suction space 110a, through the refrigerant suction port 1111 or the return port 1112.

The front housing 112 is coupled to the front end of the main housing 111 to seal the internal space of the main housing 111, that is, the suction space 110a, and at the same time supports the orbiting scroll 130 in the axial direction. Accordingly, the front housing 112 may be understood as a part of the casing 110, or as a frame forming part of the compression section.

The front housing 112 includes a cover portion 1121 and a frame portion 1122. An axis receiving portion 1121a is formed penetrating inside the cover portion 1121. The axis receiving portion 1121a is formed on the same axis as the pivot space portion 1122a of the frame portion 1122, which will be described later. Accordingly, the drive shaft 120 passes through the shaft receiving portion 1121a of the cover portion 1121 and the pivoting space portion 1122a of the frame portion 1122, and the front end is connected to the clutch assembly 2 and the rear end is connected to the orbiting scroll. Each is combined with (130).

The frame portion 1122 is formed in an annular shape, and a pivoting space portion 1122a is formed in the central portion. The turning space 1122a is a space in which the drive shaft coupling part 133 of the turning scroll 130, which will be described later, makes a turning movement, and is penetrated to communicate with the shaft receiving part 1121a and the lubrication space part 1121b on the same axis. .

The rear surface of the frame portion 1122 forms a scroll support surface 1122b. In other words, the rear surface of the frame portion 1122 facing the orbiting scroll 130 forms a scroll support surface 1122b on which the orbiting mirror plate portion 131, which will be described later, is supported in the axial direction. Accordingly, the scroll support surface 1122b forms the axial bearing surface described above together with the front surface of the pivot plate portion 131 facing it.

The scroll support surface 1122b is provided with an anti-rotation pin 171 that forms the anti-rotation mechanism 170 along with a ring insertion groove (or anti-rotation ring) to be described later. A plurality of anti-rotation pins 171 are provided at preset intervals along the circumferential direction, for example, between oil supply grooves 1122c, which will be described later. Accordingly, the anti-rotation pin 171 suppresses the rotation movement of the orbiting scroll 130 together with the ring insertion groove (or anti-rotation ring) 1311, which will be described later.

The rear housing 113 according to this embodiment is formed in a substantially cylindrical shape with one end (front end) open and the other end (rear end) closed. In other words, the front end facing the fixed scroll 140, which will be described later, is open, while the rear end facing away from the fixed scroll 140 is formed in a closed shape. Accordingly, the internal space of the rear housing 113 forms a discharge space 110b together with the rear surface of the fixed head plate 141, which will be described later, to accommodate the refrigerant discharged from the compression chamber (V).

Referring to Figures 2 to 4, a refrigerant discharge port 1131 is formed on the side wall of the rear housing 113, penetrating between the inner and outer peripheral surfaces. The inner end of the refrigerant discharge port 1131 is opened to the inner peripheral surface of the rear housing 113 to communicate with the discharge port 1411, which will be described later, and the outer end of the refrigerant discharge port 1131 is connected to the refrigerant discharge pipe 116. Accordingly, the refrigerant discharge pipe 116 communicates with the internal space of the rear housing 113, that is, the discharge space 110b, through the refrigerant discharge port 1131. The refrigerant discharge pipe 116 is connected to the inlet of the oil separator 161 described above, and the outlet of the oil separator 161 is connected to the condenser ( 20). The oil separator 161 will be described again later.

On the rear outer peripheral surface of the rear housing 113, a third connecting protrusion (not marked) and a fourth connecting protrusion (not marked) extend from the outer peripheral surface, and on the rear inner peripheral surface of the rear housing 113, a first compartment protrusion 1132 is formed. And the second compartment protrusion 1133 extends on the same axis as the third connection protrusion and the fourth connection protrusion, respectively.

A bypass port (1132a) is formed by penetrating between both ends of the third connection protrusion and the first compartment protrusion (1132), and an injection port (1133a) is formed by penetrating between both ends of the fourth connection protrusion and the second compartment protrusion (1133). It is formed by The first compartment protrusion 1132 and the second compartment protrusion 1133 will be described again later.

The end of the third connection protrusion forming the outer end of the bypass port 1132a is connected to the refrigerant recovery pipe 11, and the end of the first compartment protrusion 1132 forming the inner end of the bypass port 1132a has a capacity to be described later. It communicates with the variable guide groove (1523). Accordingly, the bypass port 1132a forms part of the capacity variable passage portion 152, which will be described later. The capacity variable passage unit 152 including the bypass port 1132a will be described later.

The end of the fourth connecting protrusion forming the outer end of the injection port 1133a is connected to the injection pipe 61, and the end of the second compartment protrusion forming the inner end of the injection port communicates with the injection receiving groove. Accordingly, the injection port 1133a forms part of the injection passage 153, which will be described later. The injection passage portion 153 including the injection port 1133a will be described later.

Referring to FIG. 2, the drive shaft 120 according to this embodiment transmits the driving force transmitted through the clutch assembly 2 to the compression part, that is, the orbiting scroll 130, and a part of the drive shaft 120 is connected to the casing. Outside of 110, other parts of the drive shaft 120 are respectively disposed outside of the casing 110.

For example, the drive shaft 120 includes a shaft portion 121 and a pin portion 122. The shaft portion 121 is coupled to the clutch assembly 2, and the pin portion 122 extends from the shaft portion 121 and is coupled to the orbiting scroll 130 with an eccentric bush 125, which will be described later, interposed therebetween. Accordingly, the driving force transmitted through the clutch assembly 2 is transmitted to the orbiting scroll 130 through the drive shaft 120.

Referring to FIGS. 2 to 4, the orbiting scroll 130 according to the present embodiment is coupled to the rear end of the drive shaft 120 with the eccentric bush 125 in between and is connected to the frame portion 1122 of the front housing 112. is supported axially. Accordingly, the orbiting scroll 130 receives rotational force through the drive shaft 120 while being axially supported on the frame portion 1122 of the front housing 112 and makes a orbital movement.

Specifically, the orbiting scroll 130 includes a pivot plate portion 131, a pivot wrap 132, and a drive shaft coupling portion 133. The orbiting scroll 130 may be made of a material lighter than the front housing 112, for example, aluminum. Accordingly, compressor efficiency can be increased by reducing the load on the balance weight.

The pivoting plate portion 131 is formed in a disk shape. A pivoting wrap 132 is formed on one side (rear surface) of the pivoting disk portion 131 and is engaged with a fixing wrap 142 to be described later to form a compression chamber (V), and the other side (front surface) of the pivoting disk portion 131 is formed. On the left side), the eccentric bush 125 is combined to form a drive shaft coupling portion 133 that receives rotational force through the drive shaft 120. Accordingly, the rear surface of the pivoting disk portion 131 forms a compression chamber (V) together with the front surface of the fixed disk portion 141, which will be described later, while the front surface of the pivoting disk portion 131 forms the front housing 112. It is supported in the axial direction on the scroll support surface 1122b to form an axial bearing surface.

A thrust plate 135 may be provided between the rear surface of the pivot plate portion 131 and the scroll support surface 1122b. However, if the front housing 112 and the orbiting scroll 130, which form the axial bearing surface, are made of different materials, the thrust plate 135 described above may be excluded.

A ring insertion groove 1311 is formed on the front surface of the pivot plate portion 131 to allow the anti-rotation pin 171, which forms part of the anti-rotation mechanism 170, to be rotatably inserted. Accordingly, the orbiting scroll 130, which receives the rotational force by the drive shaft 120, includes an anti-rotation ring 172 inserted into the ring insertion groove 1311 and an anti-rotation pin 171 inserted into the anti-rotation ring 172. A turning movement is caused by .

The turning wrap 132 extends from one side (rear surface) of the turning mirror plate 131 toward the fixed scroll 140. The orbiting wrap 132 may be formed in various shapes, such as an involute, to correspond to the fixed wrap 143.

A tip seal groove is formed in the axial cross-section of the turning wrap 132 so that a tip seal member (not denoted) can be inserted. Accordingly, axial leakage between compression chambers through the axial cross section of the turning wrap 132 can be suppressed.

The swing wrap 132 may extend to the outer peripheral surface of the pivot plate portion 131. Accordingly, the wrap length of the orbital wrap 132 can be extended to the maximum to secure the maximum suction volume.

At the winding direction end of the turning wrap 132 and the winding direction end of the fixed wrap 142, which will be described later, are a first suction end 132a and a second suction end (132a) independently communicating with both compression chambers V1 and V2. 142a) can be formed respectively. This will be explained again in conjunction with the fixed wrap 142 later.

The drive shaft coupling portion 133 extends from the geometric center of the orbiting scroll 130 toward the front housing 112. The pin portion 122 of the drive shaft 120 is rotatably coupled to the drive shaft coupling portion 133 together with the eccentric bush 125. Accordingly, the rotational force of the drive shaft 120 is transmitted to the orbiting scroll 130 through the drive shaft coupling portion 133.

Referring to Figures 2 to 4, the fixed scroll 140 according to this embodiment is inserted into the main housing 111, with its front surface between the front housing 112 and its rear surface between the block housing 150. They are each supported and fixed in the axial direction to the rear housing 113. Accordingly, the internal space of the casing 110 is divided into a suction space 110a that accommodates the orbiting scroll 130 centered on the fixed scroll 140 and a discharge space 110b containing a part of the fixed scroll 140. , the orbiting scroll 130 forms a pair of compression chambers while rotating with respect to the fixed scroll 140.

Specifically, the fixed scroll 140 includes a fixed head plate portion 141 and a fixed wrap 142.

The fixed head plate portion 141 is formed in a disk shape. The outer peripheral surface of the fixed head plate portion 141 may be inserted in almost contact with the inner peripheral surface of the casing 110, that is, the inner peripheral surface of the main housing 111. A sealing member (not marked) may be inserted into the outer peripheral surface of the fixed head plate portion 141. Accordingly, the outer peripheral surface of the fixed head plate portion 141 and the inner peripheral surface of the main housing 111 are tightly sealed, so that the internal space of the casing 110 is divided into the suction space (and reservoir space) 110a on the front side and the discharge space on the rear side. It may be separated by a space 110b.

Although not shown in the drawing, when the previously described sealing protrusion (not shown) is formed on the rear housing 113, a sealing member (not shown) is formed between the inner peripheral surface of the sealing protrusion and the outer peripheral surface of the fixed head plate portion 141 facing it. It may also be inserted.

Referring to Figures 3 and 4, a discharge port 1411 is formed at the center of the fixed head plate portion 141. One discharge port 1411 may be formed to communicate with both compression chambers (V1) (V2), or a plurality of discharge ports 1411 may be formed to communicate independently with both compression chambers (V1) (V2). This embodiment discloses an example in which one discharge port 1411 is formed.

At least one bypass hole 1412a, 1412b and an injection hole 1414 are formed around the discharge port 1411. The bypass holes 1412 and 1413, including the discharge port 1411, are holes for discharging the refrigerant inside the compression chamber (V) to the outside of the compression chamber (V), and the injection hole 1414 is outside the compression chamber (V). This is a hole through which refrigerant is injected into the compression chamber (V).

The bypass holes 1412a and 1412b are an overcompression prevention bypass hole (hereinafter referred to as first bypass hole) 1412a that suppresses overcompression and/or a capacity variable bypass hole (hereinafter referred to as second bypass) for capacity variation. pass hole) (1412b). Hereinafter, for convenience, the first bypass hole 1412 is a discharge hole that forms part of the discharge passage 151 together with the discharge port 1411, and the second bypass hole 1413 is a part of the capacity variable passage 152. It can be explained by defining it as a bypass hole forming .

The first bypass hole (1412a) is formed independently for each compression chamber (V) in the vicinity of the discharge port (1411), and the second bypass hole (1412b) is formed independently of the discharge port (1411) from the first bypass hole (1412a). ) can be formed independently for each compression chamber at a position farther from the suction side, that is, than the first bypass hole 1412a. The discharge passage portion 151 including the discharge port 1411 and the first bypass hole 1412 and the capacity variable passage portion including the second bypass hole 1413 will be described later together with the block housing 150.

The discharge port 1411, the first bypass hole 1412a, and the second bypass hole 1412b are each opened and closed by a check valve. For example, the discharge port 1411 is connected to the discharge valve 1513, the first bypass hole 1412a is connected to the first bypass valve 1514, and the second bypass hole 1412b is connected to the second bypass valve. It is opened and closed by (1524). Accordingly, it is possible to suppress the refrigerant from flowing back from outside the compression chamber (V) into the inside of the compression chamber (V)d.

The discharge valve 1513, the first bypass valve 1514, and the second bypass valve 1524 may be configured independently, or some of them may be connected to each other to form an integrated unit. This embodiment shows an example in which the discharge valve 1513, the first bypass valve 1514, and the second bypass valve 1413 are formed independently and coupled to the fixed head plate portion 141.

The injection hole 1414 is formed on the suction side further than the second bypass hole 1413. Accordingly, the injection hole 1414 is located furthest from the discharge port 1411. For example, the injection hole 1414 may be formed so that each compression chamber (V1) (V2) is positioned at a rotation angle approximately 30 degrees further than the rotation angle at which suction is completed. Accordingly, the pressure in the compression chamber (V1) (V2) where the injection hole (1414) is formed is low, and it is possible to suppress the refrigerant from flowing back from the compression chamber (V1) (V2) to the gas-liquid separator (60) in the injection mode. The injection passage portion 153 including the injection hole 1414 will be described again together with the block housing 150 later.

The injection hole 1414 is opened and closed by a check valve. For example, the injection hole 1414 is opened and closed by the injection valve 1534 coupled to the injection cover 1535, which will be described later. Accordingly, it is possible to suppress the refrigerant from flowing back from the inside of the compression chamber (V) to the outside of the compression chamber (V).

Referring to FIGS. 2 to 4, the block housing 150 according to this embodiment is formed in a disk shape and is provided between the rear surface of the fixed scroll 140 and the front inner surface of the rear housing 113 facing it. That is, it is separated from the fixed scroll 140 and/or the rear housing 113, but in some cases, it may be understood as a part of the fixed scroll 140 or a part of the rear housing 113.

For example, the block housing 150 may be coupled between the fixed scroll 140 and the rear housing 113 so that its outer peripheral surface is exposed to the outside of the casing 110, forming the internal space of the rear housing 113. It may be inserted into the discharge space 110b of the casing 110 and accommodated inside the casing 110.

In the former case, the area of the block housing 150 increases, allowing greater design freedom for the passage parts 151, 152, and 153, which will be described later, and can be advantageous for heat dissipation. On the other hand, in the latter case, as the block housing 150 is inserted into the internal space of the rear housing 113, only the space between the main housing 111 and the rear housing 113 is sealed when assembling the casing 110, making it more expensive than the former. Manufacturing costs can be lowered by reducing the sealing surface. This embodiment will be described focusing on the latter, that is, an example in which the block housing 150 is completely inserted into the internal space of the rear housing 113.

Here, since the inner space of the rear housing 113 forms the actual discharge space 110b of the casing 110, hereinafter, for convenience, the inner space of the rear housing 113 is referred to as the discharge space 110b or the rear housing 113. It is defined and explained as the discharge space 110b.

The front surface (150a) of the block housing (150) is in close contact with the rear surface of the fixed head plate portion (141) and supported in the first axis direction, and the rear surface (150b) of the block housing (150) is in the rear housing (113). It is supported in the second axis direction in close contact with the extending first compartment protrusion 1132 and/or the second compartment protrusion 1133. Accordingly, the block housing 150 can be firmly fixed to the fixed scroll 140 and/or the rear housing 113 without using separate fastening members (not shown) such as bolts or rivets.

Although not shown in the drawing, between the front surface 150a of the block housing 150 and the rear surface of the fixed head plate 141 and/or between the rear surface 150b of the block housing 150 and the front surface of the rear housing 113. A sealing member such as an O-ring or a gasket may be provided between the two surfaces (to be precise, the front surfaces of the first and second compartment protrusions). Accordingly, refrigerant leakage from the discharge passage portion 151, the capacity variable passage portion 152, and the injection passage portion 153, which will be described later, can be effectively suppressed.

Additionally, the outer peripheral surface of the block housing 150 is in close contact with the inner peripheral surface of the rear housing 113 and is supported in the radial direction. Accordingly, the block housing 150 is firmly supported by the fixed scroll 140 and the rear housing 113, so that the assembly position can be more firmly maintained without separate fastening.

In this case, the injection sealing protrusion 1415 surrounding the injection hole 1414 is on the rear surface of the fixed scroll 140, that is, the rear surface of the fixed mirror plate 141, and forms the front surface 150a of the block housing 150, which will be described later. On the front surface (150a) of the block housing (150), which protrudes toward and faces the injection sealing protrusion (1415), an injection sealing groove (1536) surrounding the injection guide hole (1533) extends from the end of the injection guide hole (1533). is formed. Through this, the injection sealing protrusion 1415 is inserted into the injection sealing groove 1536 and supported in the radial direction, so that the block housing 150 for the fixed scroll 140 can be accurately positioned at the assembly position without a separate reference protrusion or reference groove. You can sort.

Although not shown in the drawing, there is a reference protrusion (not shown) and a reference groove (not shown) between the block housing 150 and the fixed scroll 140 and/or between the block housing 150 and the rear housing 113. It may be provided. Accordingly, when assembling the block housing 150, the block housing 150 can be more accurately aligned at the assembly position of the fixed scroll 140 and the rear housing 113.

The block housing 150 according to this embodiment includes a discharge passage portion 151, a capacity variable passage portion 152, and an injection passage portion 153. The discharge passage portion 151 connects the discharge port 1411 and the first bypass hole 1412 to the discharge space 110b of the casing 110, and the capacity variable passage portion 152 connects the second bypass hole 1413. ) is connected to the suction space (110a) of the casing (110), and the injection passage portion (153) connects the injection hole (1414) to the refrigeration cycle. Accordingly, the discharge passage 151 may be understood as a part of the entire discharge passage, the capacity variable passage 152 may be understood as a part of the entire capacity variable passage, and the injection passage 153 may be understood as a part of the entire injection passage.

The discharge passage portion 151 according to this embodiment includes a discharge receiving groove 1511 and a discharge guide hole 1512.

Referring to FIGS. 3 to 5, the discharge receiving groove 1511 is recessed by a preset depth in the front surface 150a of the block housing 150, and the front surface of the opened discharge receiving groove 1511 is a fixed head plate portion. It is covered by the posterior surface of (141). Accordingly, the discharge receiving groove 1511 is separated from the discharge space 110b (hereinafter defined and explained as the discharge space of the rear housing), which is the internal space of the rear housing 113, but is connected to the discharge guide hole 1512, which will be described later. It communicates with the discharge space 110b of the rear housing 113.

The discharge receiving groove 1511 is formed of three receiving grooves 1511a, 1511b, (1511c) extending radially long from the center of the front surface 150a of the block housing 150. However, these three receiving grooves (1511b) 1511a) (1511b) (1511c) have ends facing the center of the block housing 150 connected to each other. Accordingly, the discharge receiving groove 1511 can be formed in an approximately Y shape when projected in the axial direction. .

The discharge port 1411 of the fixed scroll 140 is accommodated in the center of the discharge receiving groove 1511, and the first receiving groove 1511a, which forms part of the discharge receiving groove 1511, has a discharge valve that opens and closes the discharge port 1411. (1513) is accepted. In other words, the first receiving groove 1511a is formed in the shape of a long groove extending long in the radial direction, so that the discharge valve 1513 consisting of a long reed valve can be sufficiently accommodated in the first receiving groove 1511a.

In addition, the second receiving groove 1511b and the third receiving groove 1511c, which form another part of the discharge receiving groove 1511, have a first bypass hole 1412 ( 1412) are each accommodated, and the plurality of first bypass valves 1514 (1514) that open and close the first bypass holes 1412 (1412) are the second receiving groove (1511b) and the third receiving groove (1511b) described above ( 1511c), respectively. In this case, as the second receiving groove (1511b) and the third receiving groove (1511c) are formed in the shape of a long groove, each first bypass valve (1514) (1514) made of a long reed valve is connected to the second receiving groove (1511b). ) and can be sufficiently accommodated in the third receiving groove 1511c.

Referring to FIGS. 3 to 7, the discharge guide hole 1512 passes between the discharge receiving groove 1511 and both axial sides of the block housing 150, and is formed at the center of the discharge receiving groove 1511. Alternatively, it may be formed at the end of each receiving groove 1511a, 1511b (1511c). In the former case, the discharge guide hole 1512 is connected to the discharge valve 1513 and/or the first bypass valve 1514. This may increase the discharge resistance to the refrigerant or interfere with the injection receiving groove 1531, which will be described later. On the other hand, in the latter case, not only can it be formed to avoid the injection receiving groove 1531, but also the discharge guide hole 1512. As the area covered by the discharge valve 1513 and/or the first bypass valve 1514 is reduced compared to the former, discharge resistance to the refrigerant may be reduced.

This embodiment shows an example in which the discharge guide hole 1512 is formed at the outer end of the second receiving groove 1511b and the third receiving groove 1511c. Accordingly, the refrigerant discharged through the discharge port 1411 and/or the first bypass hole 1412 is combined inside the discharge receiving groove 1511 and discharged from the rear housing 113 through each discharge guide hole 1512. It is discharged into the space 110b.

In addition, a plurality of discharge guide holes 1512 may be formed, and the inner diameter of each discharge guide hole 1512 may be larger than or equal to the inner diameter of the discharge hole 1411. Accordingly, the refrigerant discharged through the discharge port 1411 and/first bypass hole 1412 can be quickly discharged into the discharge space 110b through each discharge guide hole 1512 (1512).

Although not shown in the drawing, the inner diameter of each discharge guide hole 1512 may be smaller than the inner diameter of the discharge port 1411. Since there are a plurality of discharge guide holes 1512 (1512), even if the inner diameter of the discharge guide hole 1512 is formed smaller than the inner diameter of the discharge port 1411, the discharge is discharged through the discharge port 1411 and the first bypass hole 1412. The refrigerant can be smoothly discharged into the discharge space (110b) through the discharge guide hole (1512) (1512).

In addition, a plurality of discharge guide holes 1512 (1512) may be formed, and the inner diameters of the plurality of discharge guide holes 1512 (1512) may be formed to be the same. Accordingly, the refrigerant discharged through the discharge port 1411 and/first bypass hole 1412 can be evenly distributed to both discharge guide holes 1512 and quickly discharged into the discharge space 110b.

Although not shown in the drawing, the inner diameters of the plurality of discharge guide holes 1512 (1512) may be formed differently. In this case, the position or size of the discharge passage 151, the capacity variable passage 152, and the injection passage 153 in the block housing 150 can be adjusted as needed.

Referring to Figures 3 to 7, the capacity variable passage portion 152 may include a capacity variable groove 1521 and a capacity variable hole 1522.

The capacity variable groove 1521 is recessed to a preset depth in the front surface 150a of the block housing 150, and the capacity variable hole 1522 is a capacity variable groove 1521 facing the fixed scroll 140. It may be axially penetrated from the front side to the rear side 150b of the block housing 150.

In this case, only one capacity variable groove 1521 may be formed to cover the two second bypass holes 1413 passing through both compression chambers V1 and V2. However, as in the present embodiment, as the discharge receiving groove 1511 is formed in a Y shape at the center of the front surface 150a of the block housing 150, discharge is discharged from the front surface 150a of the block housing 150. It may not be easy to form one capacity variable groove 1521 encompassing the plurality of second bypass holes 1413 (1413) without interfering with the receiving groove 1511.

Accordingly, in this embodiment, a plurality of capacity variable grooves 1521a and 1521b may be formed to individually accommodate a plurality of second bypass holes 1413 and 1413. In this case, a plurality of capacity variable holes 1522 (1522) may also be provided and formed to individually communicate with each capacity variable groove 1521. Hereinafter, the capacity variable groove 1521 is referred to as the first capacity variable groove (1521a) and the second capacity variable groove (1521b), and the capacity variable hole 1522 is referred to as the first capacity variable hole (1522a) and the second capacity variable hole (1522a). Each variable hole 1522b will be described separately.

Additionally, in this case, the first capacity variable hole 1522a and the second capacity variable hole 1522b may be individually connected to the bypass port 1132a of the rear housing 113. In other words, two bypass ports 1132a are formed in the rear housing 113 to respectively correspond to the second capacity variable holes 1522b, and can be respectively connected to the refrigerant recovery pipe 11. However, in this case, the refrigerant piping around the compressor becomes complicated, making it difficult to configure the overall refrigeration cycle device.

Accordingly, a capacity variable guide groove 1523 that can unify a plurality of capacity variable holes 1522 is provided on the rear surface 150b of the block housing 150 and/or the front inner side of the rear housing 113 facing it. can be formed. This embodiment shows an example in which a capacity variable guide groove 1523 is formed on the rear surface 150b of the block housing 150.

Specifically, the capacity variable passage portion 152 according to the present embodiment includes a first capacity variable groove (1521a), a first capacity variable hole (1522a), a second capacity variable groove (1521b), and a second capacity variable hole. (1522b) and a capacity variable guide groove (1523).

The first capacity variable groove 1521a is recessed by a preset depth in the front surface 150a of the block housing 150, and the front surface of the opened first capacity variable groove 1521a is the fixed head plate portion 141. It is covered by the posterior surface of. Accordingly, the capacity variable passage portion 152 including the first capacity variable groove 1521a is separated from the discharge space 110b of the rear housing 113 and sealed.

The first capacity variable groove 1521a is composed of two first capacity variable grooves 1521a extending approximately radially from the edge of the front surface 150a of the block housing 150, and the two first capacity variable grooves 1521a The receiving grooves 1521a are formed independently and spaced apart from each other. Accordingly, two capacity variable grooves 1521 (1521) are formed around the discharge receiving groove 1511 and spaced apart from the discharge receiving groove 1511.

A second bypass valve 1524 that opens and closes the second bypass hole 1413 is accommodated in the first capacity variable groove 1521a. In other words, the first capacity variable groove 1521a is formed in the shape of a long groove extending long in the radial direction or an equivalent direction, so that the second bypass valve 1524 consisting of a long reed valve is the first capacity variable groove 1521a. ) can be sufficiently accommodated.

The first capacity variable hole 1522a penetrates between the first capacity variable groove 1521a and one end of the capacity variable guide groove 1523, and is spaced apart from the discharge guide hole 1512 described above. In other words, the first capacity variable hole 1522a communicates with the bypass port 1132a of the rear housing 113, which will be described later, and is separated from the discharge space 110b of the rear housing 113. Accordingly, the refrigerant moving to the bypass port (1132a) through the first capacity variable hole (1522a) is not discharged to the discharge space (110b), but to the suction space (110a) of the casing (110) through the refrigerant recovery pipe (11). It is recovered.

The first capacity variable hole 1522a may be formed at the center of the first capacity variable groove 1521a or may be formed at an end of the first capacity variable groove 1521a. In the former case, the first capacity variable hole (1522a) is partially covered by the second bypass valve (1524) facing it, which may increase the discharge resistance to the refrigerant or interfere with the injection receiving groove (1531), which will be described later. there is. On the other hand, in the latter case, not only can the injection receiving groove 1531 be avoided, but the area covered by the second bypass valve 1524 facing the first capacity variable hole 1522a is reduced compared to the former, thereby reducing the amount of refrigerant. Discharge resistance may be reduced. Accordingly, in this embodiment, the first capacity variable hole 1522a may be formed at the end of the first capacity variable groove 1521a.

The second capacity variable groove 1521b may be formed on the opposite side of the first capacity variable groove 1521a. In other words, the second capacity variable groove 1521b may be formed on the opposite side of the first capacity variable groove 1521a with respect to the discharge receiving groove 1511.

The second capacity variable groove 1521b, like the first capacity variable groove 1521a, may be formed in the shape of a long groove extending long in the radial direction or an equivalent direction. Since the shape of the second capacity variable groove (1521b) is similar to the shape of the first capacity variable groove (1521a), the description of the second capacity variable groove (1521b) is related to the first capacity variable groove (1521a). Replace with an explanation.

The second capacity variable hole 1522b may be formed at one end of the second capacity variable groove like the first capacity variable hole 1522a. Since the second capacity variable hole 1522b is similar to the first capacity variable hole 1522a, the description of the second capacity variable hole 1522b is replaced with the description of the first capacity variable hole 1522a.

Referring to FIGS. 3, 8, and 9, the capacity variable guide groove 1523 is recessed by a preset depth in the rear surface 150b of the block housing 150, and the opened capacity variable guide groove 1523 is The spherical surface is covered by the first section protrusion 1132, which will be described later. Accordingly, the capacity variable passage portion 152 including the capacity variable guide groove 1523 is separated from the discharge space 110b of the rear housing 113 and sealed.

For example, the capacity variable guide groove 1523 according to this embodiment is formed in a long arc shape along the edge of the rear surface 150b of the block housing 150. In other words, the capacity variable guide groove 1523 is connected to the first capacity variable groove 1521a and the second capacity variable groove 1521b provided on the front surface 150a of the block housing 150 when both ends are projected in the axial direction. Each is formed with a connecting length. Accordingly, one capacity variable guide groove (1523) is connected to the first capacity variable groove (1521a) and the second capacity variable groove (1521b) through the first capacity variable hole (1522a) and the second capacity variable hole (1522b). can be connected collectively.

Referring again to FIGS. 3 and 4, the injection passage portion 153 includes an injection receiving groove 1531, an injection connection hole 1532, an injection guide hole 1533, and an injection valve 1534.

The injection receiving groove 1531 is recessed by a preset depth in the rear surface 150b of the block housing 150, and the rear surface of the opened injection receiving groove 1531 is an injection cover 1535 that is in close contact with the block housing 150. ) is sealed. For example, a cover seating surface 1531a is formed to be stepped on the opening edge of the injection receiving groove 1531, and with the injection cover 1535 seated on the cover seating surface 1531a, the rear housing 113, which will be described later, is formed. The injection cover 1535 can be supported by the second compartment protrusion 1133 being in close contact. Accordingly, the injection cover 1535 is closely adhered to the injection receiving groove 1531, thereby sealing the injection receiving groove 1531, and through this, the injection receiving groove 1531 is separated from the discharge space 110b of the rear housing 113. By separating, the refrigerant in the discharge space 110b can be prevented from flowing into the injection receiving groove 1531, which has a relatively low pressure.

The injection receiving groove 1531 is formed as a single groove that is widely depressed in the center of the rear surface 150b of the block housing 150. For example, the injection receiving groove 1531 is formed with an area that overlaps a portion of the discharge receiving groove 1511 and a portion of the capacity variable grooves 1521 (1521) when projected in the axial direction. However, the injection receiving groove 1531 is located on the rear surface 150b of the block housing 150, and the discharge receiving groove 1511 and the capacity variable groove 1521 (1521) are located on the front surface 150a of the block housing 150. As each is formed, the injection receiving groove 1531 can be separated in the axial direction from these discharge receiving grooves 1511 and the capacity variable grooves 1521 and 1521. In other words, the total depth of the depth of the injection receiving groove 1531 and the depth of the discharge receiving groove 1511, or the total depth of the depth of the injection receiving groove 1531 and the depth of the capacity variable groove 1521 (1521), is the block It is formed to be smaller than the thickness of the housing 150.

The injection connection hole 1532 is formed through the injection cover 1535. Only one injection connection hole 1532 may be formed, or a plurality of injection connection holes 1532 may be formed. When only one injection connection hole 1532 is formed, only one injection valve is formed, so the number of parts for the injection valve can be reduced thereby lowering the manufacturing cost, and when multiple injection connection holes 1532 are formed, the injection port 1133a, which will be described later, is used. Since the passing refrigerant is dispersed and flows into the injection receiving groove 1531, the refrigerant can be injected more quickly. This embodiment shows an example in which there is only one injection connection hole 1532.

The injection connection hole 1532 communicates with the injection port 1133a provided in the rear housing 113. For example, a second compartment protrusion 1133 extending toward the injection cover 1535 is formed on the inner surface of the rear housing 113, and the second compartment protrusion 1133 has an injection port communicating with the injection connection hole 1532. The port 1133a is formed by penetrating. The second compartment protrusion 1133 is in close contact with the rear surface of the injection cover 1535 and seals between the injection port 1133a and the injection connection hole 1532. Accordingly, the injection passage portion 153 including the injection port 1133a is separated from the discharge space 110b of the rear housing 113.

Although not shown in the drawing, a plurality of injection connection holes 1532 may be formed and opened and closed by each injection valve 1534. In this case, the injection ports 1133a communicating with the injection connection hole 1532 are also formed in plural pieces and each communicates with each other, or an injection communication groove (not shown) is formed in the second compartment protrusion 1133 to communicate the plurality of injection connection holes 1532 with each other. poetry) may be formed. In the case where a plurality of injection connection holes 1532 are formed as described above, the inner diameter of each injection connection hole 1532 can be formed small. Then, as the injection valve 1534 becomes smaller, the responsiveness of the injection valve 1534 improves, making it possible to quickly perform injection or block injection. In addition, while reducing the inner diameter of each injection connection hole 1532, the overall cross-sectional area of the injection connection hole 1532 can be enlarged, so that the refrigerant from the refrigeration cycle (gas-liquid separator) can be more quickly injected into the compression chamber (V).

The injection guide hole 1533 penetrates from the bottom surface of the injection receiving groove 1531 toward the fixed head plate portion 141. For example, the injection guide hole 1533 may be formed on the same axis as the injection hole 1414 provided in the fixed head plate portion 141. Accordingly, the refrigerant flowing into the injection receiving groove 1531 from the refrigeration cycle (eg, gas-liquid separator) may be injected into each compression chamber (V1) (V2) through the injection hole 1414.

The inner diameter of the injection guide hole 1533 (1533) may be formed to be equal to or larger than the inner diameter of the injection hole 1414 (1414). However, injection sealing protrusions 1415 and 1415 protruding from the rear surface of the fixed head plate toward the block housing are respectively inserted into the ends of the injection guide holes 1533 and 1533 facing the injection holes 1414 and 1414, respectively. Injection sealing grooves 1536 (1536) may be formed as much as possible. Accordingly, when assembling the block housing 150, the injection sealing protrusion 1415 and the injection sealing groove 1536 can serve as a kind of reference protrusion and reference groove. Through this, the block housing 150 can be aligned at the assembly position without providing separate reference protrusions and reference grooves.

In addition, as the injection sealing protrusion 1415 is inserted and coupled to the injection sealing groove 1536, the sealing area between the injection hole 1414 and the injection guide hole 1533 is expanded, thereby sealing the injection passage 153. power can be improved.

Additionally, as shown in FIG. 4, a sealing member 1537 such as an O-ring may be provided between the injection sealing protrusion 1415 and the injection sealing groove 1536. In this case, the sealing force on the injection passage 153 can be further improved.

The injection valve 1534 may be provided to open and close the injection connection hole 1532 or the injection guide hole 1533. In this embodiment, the injection valve 1534 is made of a reed valve and is provided on the front surface of the injection cover 1535 to open and close the injection connection hole 1532. Accordingly, the refrigerant flowing into the injection receiving groove 1531 is blocked by the injection valve 1534, thereby effectively preventing the refrigerant from flowing back into the injection port 1133a.

In the drawing, the unexplained symbol 12 is a capacity variable control valve, and 62 is an injection control valve.

When the block housing as described above is provided between the fixed scroll and the rear housing, the compressor can be operated in a variable capacity mode or an injection mode depending on the conditions of GHP. Through this, the capacity of the compression chamber can be reduced to prevent the compressor from doing unnecessary work, or the compression chamber capacity can be increased so that it can do more work.

FIGS. 10A and 10B are cross-sectional views showing the movement of refrigerant depending on the operation mode in the compressor according to this embodiment, with FIG. 10A showing the capacity variable mode and FIG. 10B showing the injection mode, respectively.

First, as shown in FIG. 10a, when the capacity variable control valve 12 is opened, the refrigerant recovery pipe 11 connecting the compression chamber V and the suction space 110a is opened. Then, part of the refrigerant sucked into the compression chamber (V) moves to the refrigerant recovery pipe (11) through the capacity variable passage portion (152) and is recovered into the suction space (110a). Accordingly, the refrigerant in the compression chamber (V) is bypassed from the compression chamber (V) to the suction space (110a) before or during compression, so that the capacity of the compression chamber (V) can be appropriately lowered.

Specifically, when the refrigerant recovery pipe 11 is opened by the capacity variable control valve 12, the second bypass valve 1524 is opened due to the pressure difference. Then, part of the refrigerant sucked into both compression chambers (V1) (V2) is bypassed to the capacity variable groove (1521) of the block housing (150) through the second bypass hole (1413) of the fixed scroll (140). .

This refrigerant moves to the bypass port (1132a) of the rear housing (113) through the capacity variable hole (1522) connected to the capacity variable groove (1521) of the block housing (150), and then flows into the refrigerant recovery pipe (11). It is recovered into the suction space (110a) of the casing (110) through the return port (or refrigerant suction port) (1112) of the main housing (111).

At this time, the injection control valve 62 installed in the middle of the injection pipe 61 remains closed, thereby closing the injection passage 153. Then, it is possible to prevent the refrigerant from the gas-liquid separator 60 from being injected into the compression chamber (V) through the injection passage portion 153.

On the other hand, when the injection control valve 62 is opened as shown in FIG. 10b, the gas-liquid separator 60 provided between the first expander 31 and the second expander 32 is connected to the compression chamber (V1) (V2). The injection tube 61 is opened. Then, the gas refrigerant separated from the liquid refrigerant in the gas-liquid separator 60 moves through the injection pipe 61 to the injection port 1133a of the rear housing 113 and the injection connection hole 1532 of the injection cover 1535. . Then, this refrigerant opens the injection valve 1534 and flows into the injection receiving groove 1531 provided in the block housing 150, and then flows into the injection guide hole 1533 and the fixed scroll 140 of the block housing 150. It can be injected into each compression chamber (V1) (V2) through the injection holes (1414) (1414).

At this time, the capacity variable control valve 12 installed in the middle of the refrigerant recovery pipe 11 remains closed, thereby closing the capacity variable passage portion 152. Then, the refrigerant sucked into the compression chambers (V1) (V2) moves along the path of both compression chambers (V1) (V2), mixes with the refrigerant injected through the injection passage 153, and moves to the final compression chamber and is compressed. . Then, the compression chamber capacity can be increased and compression efficiency can be improved.

In this way, in this embodiment, in addition to the discharge passage for discharging the compressed refrigerant to the refrigeration cycle, there is a capacity variable passage for lowering the compression capacity by bypassing a part of the refrigerant compressed in the compression chamber, and a capacity variable passage for injecting the refrigerant from the refrigeration cycle into the compression chamber and compressing it. An injection passage part that increases capacity may be provided together. Accordingly, the cooling power variable range of the scroll compressor and the refrigeration cycle device equipped with the scroll compressor can be expanded by lowering or increasing the compression capacity depending on the operating conditions of the refrigeration cycle device. Through this, the manufacturing cost of the refrigeration cycle device to which the scroll compressor is applied can be reduced by replacing the compressor and reducing the number of compressors applied to the refrigeration cycle device.

Additionally, in this embodiment, the block housing 150 that distributes the refrigerant passage is disposed between the fixed scroll and the rear housing, so that the discharge passage, capacity variable passage, and injection passage described above can be easily implemented. Through this, the cooling power variable range of the scroll compressor and the refrigeration cycle device equipped with the same can be expanded.

Meanwhile, other examples of the injection passage part are as follows.

That is, in the above-described embodiment, the injection receiving groove is formed on the rear surface of the block housing, but in some cases, the injection receiving groove may be formed on the front surface of the block housing.

FIG. 11 is a perspective view of another embodiment of the block housing from the front, FIG. 12 is a perspective view of another embodiment of the block housing from the rear, and FIG. 13 is an assembly of a portion of the compressor including the block housing of FIGS. 11 and 12. This is a cross-sectional view.

Referring to FIGS. 11 to 13 , the scroll compressor according to this embodiment may be similar in basic configuration and operational effects to the scroll compressor described above. For example, the scroll compressor according to this embodiment is provided with a orbiting scroll 130 and a fixed scroll 140 inside the casing 110, and between the fixed scroll 140 and the casing (rear housing) 110. A block housing 150 may be provided.

A discharge hole 1411, a first bypass hole 1412, a second bypass hole 1413, and an injection hole 1414 are formed in the fixed scroll 140, and these discharge holes 1411 and the first bypass hole ( 1412), the second bypass hole 1413, and the injection hole 1414 may be formed in the same position as shown in FIG. 6 described above.

The block housing 150 may be provided with the previously described discharge passage portion 151, capacity variable passage portion 152, and injection passage portion 153. For example, on the front surface 150a of the block housing 150, a discharge receiving groove 1511 accommodating the discharge port 1411 and the first bypass hole 1412 is formed by being depressed to a preset depth, and the discharge receiving groove 1511 accommodates the discharge opening 1411 and the first bypass hole 1412. A discharge guide hole 1512 penetrating from the front surface 150a of the block housing 150 to the rear surface 150b may be formed at 1511. These discharge receiving grooves 1511 and discharge guide holes 1512 form the discharge passage portion 151. Since the shape and location of the discharge passage portion 151 are the same as those of the above-described embodiment, a detailed description thereof is provided. This is replaced by a description of the above-described embodiment.

In addition, around the discharge receiving groove 1511, a capacity variable groove 1521 accommodating the second bypass hole 1413 is formed by being depressed to a preset depth, and the capacity variable groove 1521 has a capacity variable hole. (1522) may be formed by penetrating from the front surface (150a) of the block housing 150 to the rear surface (150b). These capacity variable grooves 1521 and capacity variable holes 1522 form the capacity variable passage portion. Since the shape and location of the capacity variable passage portion 152 are the same as the above-described embodiment, a detailed description thereof is provided above. Replaced with a description of one embodiment.

Additionally, an injection passage portion 153 connected to the injection hole 1414 of the fixed scroll 140 may be formed between the discharge receiving groove 1511 and the capacity variable groove 1521. The injection passage portion 153 consists of an injection receiving groove 1531 and an injection connection hole 1532. The basic configuration and resulting effects of these injection receiving grooves 1531 and injection connection holes 1532 are described above. Similar to example.

However, the injection receiving groove 1531 and the injection connection hole 1532 according to the present embodiment are formed in different positions from the above-described embodiment. For example, in this embodiment, the injection receiving groove 1531 is formed on the front surface 150a of the block housing 150, and the injection connection hole 1532 is formed on the front surface of the injection receiving groove 1531 in the block housing 150. ) may be formed by penetrating into the rear surface (150b) of the.

In this case, a plurality of injection receiving grooves 1531 are formed to independently communicate with the plurality of injection holes 1414 and 1414, and the plurality of injection receiving grooves 1531 and 1532 are formed on the front surface of the block housing 150. They are formed at 150a by being spaced apart by a preset distance. For example, the plurality of injection receiving grooves 1531 (1531) are formed in a long groove shape like the previously described capacity variable grooves 1521 (1521) to form the discharge receiving groove 1511 and/or the capacity variable groove 1521. It can be formed in a position that does not interfere with (1521).

A plurality of injection connection holes 1532 (1532) are provided and formed to communicate with each injection receiving groove (1531) (1531). These injection connection holes 1532 and 1532 may be formed to be located on a different axis from the injection holes 1414 and 1414 in consideration of the flow resistance caused by the injection valves 1534 and 1534, which will be described later. Accordingly, each injection connection hole (1532) (1532) is located on a different axis from each injection hole (1414) (1414), and each injection hole (1531) is inserted through each injection receiving groove (1531) (1531). 1414) can be communicated independently.

When the injection receiving grooves 1531 (1531) are formed on the front surface (150a) of the block housing 150 as described above, unlike the above-described embodiment, an injection cover covering the injection receiving grooves (1531) (1531) is used. can be excluded. Through this, the number of parts forming the injection passage 153 can be reduced, thereby reducing manufacturing costs.

In addition, in this embodiment, the injection connection holes 1532 (1532) are formed by penetrating from each injection receiving groove (1531) (1531) to the rear surface (150b) of the block housing (150), so that each injection valve ( 1534) 1534 may be provided on the inner surface of each injection receiving groove 1531 formed on the front surface 150a of the block housing 150. Through this, the distance from each injection hole (1414) (1414) to the injection valve (1534) (1534) can be shortened, thereby reducing the dead volume in the injection passageway (153).

Meanwhile, when the plurality of injection connection holes 1532 (1532) are spaced apart from each other as in the present embodiment, an injection communication groove 1538 may be formed to communicate the plurality of injection connection holes 1532 (1532) with each other. . The injection communication groove 1538 may be formed on the rear surface 150b of the block housing 150 and/or on the second compartment protrusion 1133 of the rear housing 113, which will be described later, facing this. This embodiment shows an example in which the injection communication groove 1538 is formed on the rear surface 150b of the block housing 150.

For example, the plurality of discharge guide holes 1512 (1512) described above are penetrated through the rear surface 150b of the block housing 150 facing the rear housing 113, and the discharge guide holes 1512 (1512) A capacity variable communication groove 1525 is formed around the plurality of capacity variable communication holes 1522 and 1522, and a plurality of capacity variable communication grooves 1525 are formed around the discharge guide holes 1512 and the capacity variable communication groove 1525. An injection communication groove 1538 is formed to communicate the two injection holes 1414 and 1414 with each other. Accordingly, the injection communication groove 1538 is separated from the discharge guide hole 1512 (1512) and the capacity variable communication groove 1525.

In this embodiment, the discharge guide hole 1512 communicates with the discharge space 110b of the rear housing 113, and the capacity variable communication groove 1525 communicating with the bypass port 1132a is separated from the discharge space 110b. , the injection communication groove 1538 communicating with the injection port 1133a is separated from the discharge space 110b like the capacity variable communication groove 1525. Accordingly, the refrigerant in the discharge space 110b is blocked from flowing into the injection communication groove 1538, thereby suppressing an increase in the specific volume of the refrigerant in the compression chamber (V) due to injection of the refrigerant.

Additionally, in this embodiment, as described above, an injection sealing protrusion 1415 may be formed around the injection hole 1414 (1414). The injection sealing protrusion 1415 may be inserted into the injection receiving groove 1531 to support the block housing 150 in the radial direction. Through this, the block housing 150 can be aligned at the assembly position without separate reference protrusions and reference grooves.

Although not shown in the drawing, there is a sealing member (not shown) such as an O-ring or a gasket between the second compartment protrusion 1133 as well as the first compartment protrusion 1132 and the rear surface 150b of the block housing 150 facing it. may be provided. Accordingly, it is possible to effectively prevent the refrigerant in the discharge space 110b from flowing into the capacity variable passage portion 152 and/or the injection passage portion 153 or, conversely, from moving the refrigerant thereto. This also applies between the front surface 150a of the block housing 150 and the rear surface of the fixed scroll (more precisely, the fixed head plate portion) 140 facing it. That is, a sealing member (not shown) such as an O-ring or a gasket is provided between the front surface (150a) of the block housing (150) and the rear surface of the fixed scroll (140) so that the refrigerant in the discharge space (110b) flows into the capacity variable groove ( 1521) and/or injection receiving groove 1531 or outflow in the opposite direction can be effectively suppressed.

Meanwhile, in the above-described embodiments, an open scroll compressor applied to a gas engine heat pump has been described as an example, but it is not necessarily limited to an open scroll compressor. In other words, the above-described embodiments can be equally applied to a closed scroll compressor in which a drive motor and a compression unit are provided together inside the casing.

In addition, in the above-described embodiments, an example in which the refrigerant recovered through the bypass passage is connected to the oil return pipe and the return pipe has been described, but the present invention is not necessarily limited to this. For example, the capacity variable passage portion 152 may be connected to the refrigerant suction pipe 115 and communicate with the refrigerant suction port.

1: Gas engine heat pump 2: Clutch assembly
10: Compressor 11: Refrigerant recovery pipe
12: Capacity variable control valve 20: Condenser
30,31,32: expander 40: evaporator
50: Oil separator 51: Oil return pipe
52: Oil recovery control valve 60: Gas-liquid separator
61: Injection pipe 62: Injection control valve
70: refrigerant circulation pipe 110: casing
110a: suction space 110b: discharge space
110b1: first discharge space 110b2: second discharge space
111: main housing 1111: refrigerant suction port
1112: return port 112: front housing
1121: cover part 1121a: shaft receiving part
1121b: Lubrication space part 1122: Frame part
1122a: orbiting space 1122b: scroll support surface
113: Rear housing 1131: Refrigerant discharge port
1132: First compartment protrusion 1132a: Bypass port
1133: Second compartment protrusion 1133a: Injection port
115: Refrigerant suction pipe 116: Refrigerant discharge pipe
120: drive shaft 121: shaft portion
122: Pin part 125: Eccentric bush
1251: Subbalance weight 130: Swivel scroll
131: Swivel plate portion 1311: Ring insertion groove
132: Swivel wrap 133: Drive shaft coupling part
135: Thrust plate 140: Fixed scroll
141: Fixed mirror plate part 1411: Discharge port
1412: first bypass hole 1413: second bypass hole
1414: Injection hole 1415: Injection sealing protrusion
142: Fixed wrap 150: Block housing
150a: front side 150b: rear side
151: Discharge passage 1511: Discharge receiving groove
1511a, 1511b, 1511c: 1st, 2nd, 3rd receiving grooves 1512: Discharge guide hole
1513: Discharge valve 1514: First bypass valve
152: Capacity variable passage 1521: Capacity variable groove
1521a: First capacity variable groove 1521b: Second capacity variable groove
1522: Capacity variable hole 1522a: First capacity variable hole
1522b: Second capacity variable hole 1523: Capacity variable guide groove
1524: Second bypass valve 1525: Capacity variable flue groove
153: Injection passage 1531: Injection receiving groove
1531a: Cover seating surface 1532: Injection connection hole
1533: Injection guide hole 1534: Injection valve
1535: Injection cover 1536: Injection sealing groove
1537: Sealing member 1538: Injection flue groove
170: Anti-rotation mechanism 171: Anti-rotation pin
172: Anti-rotation ring V, V1, V2: Compression chamber

Claims (18)

It has a main housing and a rear housing coupled to one end of the main housing, and the internal space is divided into a suction space and a discharge space, the suction space is connected to one end of a refrigerant circulation pipe forming a refrigeration cycle, and the discharge space is A casing to which the other end of the refrigerant circulation pipe is connected;
a turning scroll that makes a turning movement inside the casing;
A plurality of injections are provided in the inner space of the casing to engage with the orbiting scroll to form a pair of compression chambers, and each penetrate between one side forming the pair of compression chambers and the other side opposite to the other side. A fixed scroll in which a hole is formed;
a block housing provided between the other side of the fixed scroll and the inner side of the casing facing the fixed scroll to distribute the plurality of injection holes;
a discharge passage part provided in the block housing to guide the refrigerant in the compression chamber to move toward the discharge space;
a capacity variable passage part provided in the block housing to guide the refrigerant in the compression chamber to move toward the suction space; and
An injection passage part provided in the block housing to guide the refrigerant in the refrigerant circulation pipe to move from the outside of the casing toward the compression chamber,
The injection passage part,
an injection receiving groove recessed to a preset depth on the other side of the block housing facing the rear housing;
an injection connection hole provided on one side of the injection receiving groove and connected to the refrigerant circulation pipe; and
It includes an injection guide hole provided on the other side of the injection receiving groove and connected to the injection hole,
One side of the injection receiving groove facing the rear housing is covered by an injection cover, and the injection connection hole is formed through the injection cover,
A scroll compressor in which an injection valve that opens and closes the injection connection hole is provided on one side of the injection cover facing the injection receiving groove. According to paragraph 1,
The plurality of holes include a discharge port formed at the center of the fixed scroll and a first bypass hole formed around the discharge port,
The discharge passage part,
a discharge receiving groove accommodating the discharge port and the first bypass hole; and
A scroll compressor including a discharge guide hole penetrating the block housing from inside the discharge receiving groove toward the discharge space. According to paragraph 2,
The discharge receiving groove is,
On one side of the block housing facing the fixed scroll, a plurality of discharge guide grooves recessed to a preset depth extend in the radial direction, and each end of the plurality of discharge guide grooves is connected to each other at the center of the block housing. , a discharge guide hole is formed in one or more of the plurality of discharge guide grooves,
The discharge guide hole is,
A scroll compressor formed eccentrically at the other end of the discharge guide groove. According to paragraph 1,
The plurality of holes include a second bypass hole connected to the capacity variable passage part,
The capacity variable passage part,
A capacity variable groove accommodating the second bypass hole; and
A scroll compressor including a capacity variable hole extending from the capacity variable groove toward the suction space. According to paragraph 4,
The capacity variable groove is depressed to a preset depth on one side of the block housing facing the fixed scroll,
The capacity variable hole is,
A scroll compressor with one end communicating with the capacity variable groove and the other end penetrating through the other side of the block housing. According to clause 5,
The second bypass holes are formed in plural numbers to communicate with each of the two pairs of compression chambers, and the capacity variable grooves are formed in plural numbers spaced apart from each other to accommodate the plurality of second bypass holes, respectively, The capacity variable holes are formed in plural numbers to communicate with each of the plurality of capacity variable grooves,
On the other side of the block housing,
A scroll compressor in which a capacity variable guide groove is formed in a long groove shape so that the plurality of capacity variable holes communicate with each other. According to clause 6,
On the inner side of the rear housing facing the block housing, a first compartment protrusion extends toward the block housing, and the capacity variable guide groove is covered by the first compartment protrusion and separated from the discharge space,
A bypass port penetrating between the inner and outer peripheral surfaces of the rear housing is formed on the first partition protrusion,
The bypass port is,
A scroll compressor whose one end communicates with the capacity variable guide groove and the other end communicates with the suction space. delete According to paragraph 1,
A scroll compressor wherein a plurality of injection guide holes are provided and the plurality of injection guide holes communicate with each other in the injection receiving groove. delete According to paragraph 1,
A second compartment protrusion extending toward the injection cover is formed on the inner surface of the rear housing facing the block housing, and the second compartment protrusion has an injection port penetrating between the inner and outer surfaces of the rear housing. is formed,
The injection port is,
A scroll compressor whose one end communicates with the injection connection hole and the other end connected to the middle of the refrigeration cycle outside the casing. According to paragraph 1,
An injection sealing groove extending beyond the inner diameter of the injection guide hole is formed at an end of the injection guide hole facing the fixed scroll,
An injection sealing protrusion extending toward the block housing is formed on one side of the fixed scroll facing the block housing, surrounding the injection hole,
The injection sealing protrusion,
A scroll compressor inserted into the injection sealing groove and supported in the radial direction. According to clause 12,
A scroll compressor wherein a sealing member is provided between the injection sealing protrusion and the injection sealing groove. It has a main housing and a rear housing coupled to one end of the main housing, and the internal space is divided into a suction space and a discharge space, the suction space is connected to one end of a refrigerant circulation pipe forming a refrigeration cycle, and the discharge space is A casing to which the other end of the refrigerant circulation pipe is connected;
a turning scroll that makes a turning movement inside the casing;
A plurality of injections are provided in the inner space of the casing to engage with the orbiting scroll to form a pair of compression chambers, and each penetrate between one side forming the pair of compression chambers and the other side opposite to the other side. A fixed scroll in which a hole is formed;
a block housing provided between the other side of the fixed scroll and the inner side of the casing facing the fixed scroll to distribute the plurality of injection holes;
a discharge passage part provided in the block housing to guide the refrigerant in the compression chamber to move toward the discharge space;
a capacity variable passage part provided in the block housing to guide the refrigerant in the compression chamber to move toward the suction space; and
An injection passage part provided in the block housing to guide the refrigerant in the refrigerant circulation pipe to move from the outside of the casing toward the compression chamber,
The plurality of holes include injection holes connected to the injection passage portion,
The injection passage part,
an injection receiving groove that is recessed by a preset depth on one side of the block housing facing the fixed scroll to accommodate the injection hole; and
It includes an injection connection hole provided on one side of the injection receiving groove and connected to the refrigerant circulation pipe,
A plurality of injection holes are formed to communicate with each pair of compression chambers,
The injection receiving groove and the injection connection hole are each formed in plural numbers to correspond to the plurality of injection holes,
A scroll compressor in which an injection communication groove is formed on the other side of the block housing facing the rear housing so that the plurality of injection connection holes communicate with each other. According to clause 14,
An injection sealing protrusion extending toward the block housing is formed on one side of the fixed scroll facing the block housing, surrounding the injection hole,
The injection sealing protrusion,
A radially supported scroll compressor inserted into the injection receiving groove. delete According to clause 14,
A second compartment protrusion extending toward the injection communication groove and covering the injection communication groove is formed on the inner surface of the rear housing facing the block housing, and the second compartment protrusion has inner and outer surfaces of the rear housing. An injection port is formed that penetrates between the sides,
The injection port is,
A scroll compressor whose one end communicates with the injection connection hole and the other end connected to the middle of the refrigeration cycle outside the casing. According to any one of claims 1 to 7, 9, 11 to 15, and 17,
A capacity control valve that selectively opens and closes the variable capacity passage portion and an injection control valve that selectively opens and closes the injection passage portion are provided,
The capacity control valve and the injection control valve are,
A scroll compressor provided in a pipe connected to the capacity variable passage portion and a pipe connected to the injection passage portion outside the casing.

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