Scroll compressor

Abstract

A scroll compressor of the present invention provides a plurality of injection holes that are open to a compression chamber, wherein the plurality of injection holes are in communication with each other, or provides injection holes as elongated holes having longer lengths than a wrap thickness formed by an orbiting wrap of an orbiting scroll, such that the injection holes are in communication with each other by means of a buffer space greater than the injection holes. As such, a larger amount of refrigerant gas can be supplied to the compression chamber.

Description

Scroll compressor

[0001] The present invention relates to a compressor having a refrigerant supply structure for supplying refrigerant to a compression chamber.

[0002] Generally, a compressor is a device or apparatus used for generating high pressure or transporting high-pressure fluids. Among these compressors, those applied to refrigeration cycles, such as those in refrigerators or air conditioners, perform the function of compressing refrigerant gas and transferring it to the condenser.

[0003] Among the compressors mentioned above, the scroll compressor is a type of compressor in which the rotating scroll among two scrolls installed facing each other rotates around the non-rotating scroll, and the compression chamber created between the laps of each scroll gradually narrows to compress the refrigerant.

[0004] Meanwhile, in the case of an air conditioner using the aforementioned scroll compressor, a sufficient amount of refrigerant circulation must be ensured to achieve the desired cooling and heating performance. In particular, if the outside air temperature is excessively high or low, the performance of the refrigeration cycle deteriorates.

[0005] To resolve this, conventional methods attempted to improve the performance of the refrigeration cycle by utilizing a gas injection cycle. Specifically, the refrigerant circulation volume was secured by injecting a gaseous refrigerant having an intermediate pressure between the refrigerant supplied to the scroll compressor and the compressed refrigerant discharged from the scroll compressor into the compression chamber.

[0006] In this regard, various applications are provided, such as Korean registered patents No. 10-1382007, No. 10-2068234, No. 10-2103362, and No. 10-2403949.

[0007] However, while it is desirable to increase the amount of injected refrigerant to further increase the aforementioned refrigerant circulation amount, conventional gas injection methods make it difficult to increase the amount of refrigerant injected into the compression chamber.

[0008] In other words, in the structure of the conventional technology, it was impossible to increase the diameter because the diameter of the injection hole, which is formed to communicate with the inside of the compression chamber, could not be formed larger than the thickness of the wrap.

[0009] Of course, the amount of refrigerant can be increased by increasing the number of injection holes through the addition of an injection passage penetrating the side of the non-swivel scroll. However, there were design difficulties in adding the injection passage because it had to be formed considering the location of the compression chamber and the location of the discharge holes of the non-swivel scroll.

[0010] In addition, conventionally, an injection hole formed in a compression chamber and an injection channel formed to penetrate the circumference of a non-rotating scroll to supply refrigerant to the injection hole are formed in directions perpendicular to each other. Accordingly, in order to form the injection hole, a tool must be inserted from inside the compression chamber, and thus there was an inconvenience such as the need to flip the non-rotating scroll when forming the injection hole.

[0011] The present invention was devised to solve various problems according to the aforementioned prior art.

[0012] The objective of the present invention is to increase the compression capacity by enabling the supply of more refrigerant gas to the compression chamber.

[0013] The objective of the present invention is to increase the number of injection holes while minimizing the injection passage penetrating the end plate of a non-rotating scroll.

[0014] The objective of the present invention is to enable at least a portion of the injection hole to be exposed into the compression chamber according to the rotational movement of the rotational scroll.

[0015] The objective of the present invention is to enable each injection hole to be easily formed even when a plurality of injection holes are provided.

[0016] According to the scroll compressor of the present invention for achieving the above-mentioned purpose, an injection part for additionally supplying refrigerant gas to the compression chamber created between each wrap may be formed on the non-rotating scroll.

[0017] According to the scroll compressor of the present invention, the injection section includes a plurality of injection holes, and the plurality of injection holes are formed to communicate with each other. As a result, the refrigerant gas supplied to each injection hole can be sufficiently supplied into the compression chamber through each injection hole.

[0018] According to the scroll compressor of the present invention, a plurality of injection holes are formed to communicate with each other through a buffer space. By supplying refrigerant gas to the buffer space, a large amount of refrigerant gas can be supplied into the compression chamber through the plurality of injection holes.

[0019] According to the scroll compressor of the present invention, the buffer space is formed to communicate with the injection path. As a result, the buffer space can receive refrigerant gas through the injection path.

[0020] According to the scroll compressor of the present invention, a buffer space is formed at the end of the injection path. As a result, the buffer space can receive refrigerant gas through the injection path.

[0021] According to the scroll compressor of the present invention, each injection hole can be formed to have a diameter smaller than the wrap thickness of the rotating scroll. This prevents the problem of pressure leakage by allowing the two compression chambers, each created on both sides of the wrap of the rotating scroll, to communicate with each other through the injection hole.

[0022] According to the scroll compressor of the present invention, at least two or more compression chambers are provided, and the injection hole can supply refrigerant to only one of the compression chambers. This prevents multiple compression chambers from communicating through the injection hole.

[0023] According to the scroll compressor of the present invention, the injection hole may be formed to be blocked by the wrap of the rotating scroll or to be opened to one of the compression chambers depending on the rotational movement of the rotating scroll.

[0024] According to the scroll compressor of the present invention, at least one of the plurality of injection holes can be selectively opened to one of the compression chambers depending on the rotational movement of the rotating scroll. As a result, the plurality of injection holes are not opened to both compression chambers simultaneously, thereby preventing pressure leakage between the two compression chambers.

[0025] According to the scroll compressor of the present invention, each injection hole can be formed to be smaller than the wrap thickness of the rotating scroll. This allows the injection hole to be blocked by the wrap of the rotating scroll.

[0026] According to the scroll compressor of the present invention, each injection hole can be formed along a path in which a rotating wrap forming a rotating scroll comes into close contact with the end plate portion of a non-rotating scroll. By the structure of these injection holes, they can be closed by the wrap of the rotating scroll.

[0027] According to the scroll compressor of the present invention, each injection hole can be located in the space between the laps of the non-swivel scroll. This allows refrigerant gas to be supplied to the compression chamber formed in the space between the laps of the non-swivel scroll.

[0028] According to the scroll compressor of the present invention, the buffer space can be formed to be larger than the wrap thickness of the rotating scroll. Thereby, an amount of refrigerant gas capable of passing through a plurality of injection holes can be supplied to each injection hole through the buffer space.

[0029] According to the scroll compressor of the present invention, the buffer space can be formed to accommodate all of each injection hole. Thus, the refrigerant gas supplied to the buffer space can pass through at least some of the injection holes and be supplied to the compression chamber.

[0030] According to the scroll compressor of the present invention, the buffer space can be formed to be recessed from the outer surface of the non-rotating scroll. This allows for easy processing of the buffer space.

[0031] According to the scroll compressor of the present invention, the buffer space can be formed to be recessed in the vertical thickness direction from the upper surface of the non-rotating scroll. This allows the non-rotating scroll to be processed without being flipped over during the processing of the buffer space.

[0032] According to the scroll compressor of the present invention, the buffer space is formed through to a portion communicating with each injection hole, and the through portion of the buffer space can be closed by a closing member. Thus, the buffer space can be provided as a space for temporarily storing refrigerant gas.

[0033] According to the scroll compressor of the present invention, the injection channel can be formed to penetrate from the circumferential surface of the non-rotating scroll to the buffer space. This makes it easy to form the injection channel.

[0034] According to the scroll compressor of the present invention, the buffer space can be formed to have a width greater than the width of the injection passage. Thus, when each injection hole is closed, a certain amount of refrigerant gas introduced through the injection passage can be temporarily stored in the buffer space.

[0035] According to the scroll compressor of the present invention, the buffer space may be formed as a circular shape as well as an elongated shape. This allows for diversification of the arrangement of injection holes.

[0036] According to the scroll compressor of the present invention, the injection section may be provided in multiple numbers. This allows refrigerant gas to be supplied simultaneously to different compression chambers.

[0037] According to the scroll compressor of the present invention, refrigerant gas supplied by a plurality of injection units can be provided to different compression chambers.

[0038] According to the scroll compressor of the present invention, the injection hole can be formed in a non-circular shape. This allows a sufficiently large amount of refrigerant gas to be supplied through a single injection hole.

[0039] According to the scroll compressor of the present invention, the non-circular injection hole can receive refrigerant gas through the injection path.

[0040] According to the scroll compressor of the present invention, a non-circular injection hole may be formed to be located within a buffer space. The buffer space may be formed to accommodate the non-circular injection hole.

[0041] According to the scroll compressor of the present invention, the buffer space can be formed to have a width greater than that of the non-circular injection hole.

[0042] According to the scroll compressor of the present invention, a non-circular injection hole can be formed with a width smaller than the wrap of the rotating scroll and a length longer than the width of the wrap.

[0043] According to the scroll compressor of the present invention, a non-circular injection hole can be formed to follow a part of the scroll shape formed by the wrap of the rotating scroll.

[0044] According to the scroll compressor of the present invention, a non-circular injection hole may be positioned such that it is entirely blocked by a wrap or at least partially opened to one of the compression chambers depending on the rotational movement of the rotating scroll.

[0045] As described above, the scroll compressor of the present invention has the following effects.

[0046] The scroll compressor of the present invention can increase the flow rate of refrigerant gas supplied into the compression chamber through the injection path with the application of a minimal additional structure.

[0047] The scroll compressor of the present invention can increase the number of injection holes that supply refrigerant gas to the compression chamber without providing additional injection passages.

[0048] The scroll compressor of the present invention allows the molding of injection holes to be performed without flipping the non-rotating scroll due to the buffer space, thereby improving work convenience.

[0049] FIG. 1 is a cross-sectional view of a scroll compressor according to an embodiment of the present invention.

[0050] FIG. 2 is an upper perspective view of a non-swivel scroll of a scroll compressor according to an embodiment of the present invention.

[0051] FIG. 3 is a bottom perspective view of a non-swivel scroll of a scroll compressor according to an embodiment of the present invention.

[0052] FIG. 4 is a plan view of a non-swivel scroll of a scroll compressor according to an embodiment of the present invention.

[0053] FIG. 5 is a bottom view of a non-swivel scroll of a scroll compressor according to an embodiment of the present invention.

[0054] FIG. 6 is a front view of a non-swivel scroll of a scroll compressor according to an embodiment of the present invention.

[0055] FIG. 7 is a cross-sectional view along line AA of FIG. 6.

[0056] FIG. 8 is a longitudinal cross-sectional view of a non-swivel scroll of a scroll compressor according to an embodiment of the present invention.

[0057] FIGS. 9 to 12 are state diagrams for explaining the relationship between the non-swivel wrap, the swivel wrap, and the injection part of a scroll compressor according to an embodiment of the present invention.

[0058] FIG. 13 is an enlarged view illustrating the relationship between the non-swivel wrap, the swivel wrap, and the injection part of a scroll compressor according to another embodiment of the present invention.

[0059] FIG. 14 is a cross-sectional view of another form of a scroll compressor according to an embodiment of the present invention.

[0060] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0061] In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that another component may also be "connected," "combined," or "connected" between each component.

[0062] The scroll compressor of the present invention provides a plurality of injection holes (510) that open to the compression chambers (C, C1) and are formed to be interconnected so as to allow a larger amount of refrigerant gas to be supplied to the compression chambers (C, C1).

[0063] A preferred embodiment of the scroll compressor of the present invention will be described in more detail for each component with reference to the attached FIGS. 1 to 14 as follows.

[0064] The scroll compressor of the embodiment of the present invention has a case (100) defined by its exterior.

[0065] As shown in FIG. 1, the case (100) is formed to have a sealed internal space.

[0066] The above case (100) may be formed by combining at least one or more parts. For example, the above case (100) may be formed of a body shell (110) forming a perimeter part, an upper shell (120) forming an upper part, and a lower shell (130) forming a lower part.

[0067] A refrigerant suction pipe (140) and a refrigerant discharge pipe (150) can be connected to the above case (100).

[0068] The above refrigerant suction pipe (140) is a conduit that receives refrigerant from an external device and sucks it into the case (100). When the scroll compressor of the embodiment of the present invention is connected to a refrigeration cycle, the external device supplying refrigerant to the scroll compressor may be an evaporative heat exchanger.

[0069] The above refrigerant suction pipe (140) may be provided in the body shell (110). That is, refrigerant may be introduced into the suction space within the body shell (110) through the refrigerant suction pipe (140).

[0070] The above refrigerant discharge pipe (150) is a conduit that discharges refrigerant gas compressed in the compression section (300) to an external device. When the scroll compressor of the embodiment of the present invention is connected to a refrigeration cycle, the external device to which refrigerant is supplied from the scroll compressor may be a condensation heat exchanger.

[0071] The above refrigerant discharge pipe (150) can be provided in the upper shell (120). That is, the refrigerant in the discharge space provided by the upper shell (120) can be guided to an external device through the refrigerant discharge pipe (150).

[0072] A high-low pressure separator (160) may be provided inside the above case (100). The high-low pressure separator (160) can separate a suction space (S1), which is a relatively low pressure section, and a discharge space (S2), which is a relatively high pressure section. The suction space (S1) may correspond to the lower space of the high-low pressure separator (160), and the discharge space (S2) may correspond to the upper space of the high-low pressure separator (160).

[0073] An electric motor (200) is provided in the internal space of the above case (100).

[0074] The above-mentioned electric motor (200) may be defined as a part or device that provides driving force to the compression unit (300), which will be described later, to compress the refrigerant.

[0075] The above-mentioned electric motor (200) may be provided in any one of the internal spaces of the case (100). For example, as illustrated, the electric motor (200) may be provided in the lower space within the body shell (110) forming the case (100).

[0076] The above-mentioned electric motor (200) includes a rotor (210) and a stator (220). The rotor (210) rotates a rotation axis (230) that is located inside the stator (220) and passes through its center.

[0077] The above-mentioned rotating shaft (230) can be defined as a conventional crank shaft, and the upper end of the rotating shaft (230) is connected to a compression part (300).

[0078] The above compression unit (300) can be defined as a part or device that compresses the refrigerant.

[0079] The above compression unit (300) may be provided in the suction space (S1) within the internal space of the case (100). For example, as illustrated, the compression unit (300) may be provided in the upper space within the body shell (110) forming the case (100). In this case, the upper space within the body shell (110) may be provided as the suction space (S1).

[0080] The above compression unit (300) includes a non-rotating scroll (310) and a rotating scroll (320) arranged to face each other vertically. For example, the non-rotating scroll (310) is located on the upper side and the rotating scroll (320) is located on the lower side.

[0081] The above non-rotating scroll (310) has a first plate section (311) and a non-rotating wrap (312).

[0082] The bottom surface (the surface facing the rotating scroll) of the first top plate section (311) is formed as a flat surface. The non-rotating wrap (312) is formed to protrude from the bottom surface of the first top plate section (311).

[0083] The above-mentioned rotating scroll (320) has a second plate section (321) and a rotating wrap (322).

[0084] The upper surface of the second mirror plate (321) (the surface facing the non-rotating scroll) is formed as a flat plane. The rotating wrap (322) is formed to protrude from the upper surface of the second mirror plate (321).

[0085] The end surfaces of the non-rotating wrap (312) and the rotating wrap (322) are installed to come into contact with the end plate of the opposite scroll, thereby forming at least one compression chamber (C, C1). For example, the end surface (bottom surface) of the non-rotating wrap (312) is in close contact with the upper surface of the second end plate (321) of the rotating scroll (320), and the end surface (top surface) of the rotating wrap (322) is in close contact with the lower surface of the first end plate (311) of the non-rotating scroll (310).

[0086] Each of the above wraps (312, 322) is formed in a spiral shape and is installed so that a specific part of the rotating wrap (322) comes into contact with a specific part of the non-rotating wrap (312) according to the rotational movement of the rotating scroll (320).

[0087] Accordingly, a compression chamber (C, C1) (see FIG. 9) is formed between two points (contact points) where each of the above-mentioned wraps (312, 322) meet. That is, the compression chamber (C, C1) is formed to be sealed from the external environment by a wall located between two contact points between each of the above-mentioned wraps (312, 322), the bottom surface of the first end plate (311), and the top surface of the second end plate (321).

[0088] The above compression chambers (C, C1) may be provided in multiple numbers depending on the contact position between each wrap (312, 322).

[0089] The compression space of the plurality of compression chambers (C, C1) can be gradually varied by the rotation of the rotation wrap (322) caused by the rotational movement of the rotational scroll (320). For example, the compression space of the compression chambers (C, C1) is gradually reduced by the rotational movement of the rotation wrap (322) while compressing the refrigerant. In the attached FIGS. 9 to 12, a state in which the compression space of each compression chamber changes according to the rotational movement of the rotational scroll (320) is shown.

[0090] At least one of the above non-rotating scroll (310) and rotating scroll (320) can be configured to rotate relative to the other scroll.

[0091] For example, the non-rotating scroll (310) may be installed so as not to rotate, and the rotating scroll (320) may be installed so as to be able to rotate. The rotating scroll (320) may be installed to rotate with respect to the axis center of the non-rotating scroll (310).

[0092] Preferably, the non-rotating scroll (310) is fixedly installed on the main frame (400) within the case (100). The fixation may be defined as a state in which rotation or rotation in the circumferential direction is prevented. For example, the non-rotating scroll (310) may be installed to move in an up-and-down direction opposite to the rotating scroll (320), or the non-rotating scroll (310) may be installed to move radially relative to the rotating scroll (320).

[0093] The axis center of the rotation axis (230) is installed to be concentric with the center of the non-rotating scroll (310), and the center of the rotating scroll (320) is coupled to be eccentric from the axis center of the rotation axis (230). To this end, an eccentric pin (231) is formed at the top of the rotation axis (230) and is eccentric from the axis center of the rotation axis (230), and a boss (323) is formed at the bottom of the rotating scroll (320) to accommodate the eccentric pin (231).

[0094] The above-mentioned pivot scroll (320) is placed on the upper surface of the main frame (400) and pivots, and the rotation axis (230) penetrates the central portion of the main frame (400) and is coupled to a boss (323) formed on the lower surface of the pivot scroll (320).

[0095] Meanwhile, a discharge hole (313) is formed in the non-rotating scroll (310). The discharge hole (313) may be formed to penetrate the center of the bottom surface of the first end plate (311) forming the non-rotating scroll (310). Thus, the refrigerant compressed up to the center of the non-rotating scroll (310) can be discharged into the discharge space (S2) through the discharge hole (313).

[0096] Although not clearly illustrated, the discharge holes (313) may be provided in multiple numbers.

[0097] A discharge valve (not shown) is provided in the portion of the outer surface of the non-rotating scroll (310) where the discharge hole (313) is formed, and the discharge hole (313) is operated to open when the refrigerant gas is compressed to a set pressure.

[0098] The scroll compressor of the embodiment of the present invention includes an injection unit (500) for additionally supplying refrigerant gas to the compression chamber (C, C1).

[0099] The injection unit (500) supplies refrigerant gas to the compression chamber (C, C1) formed between the wraps of each scroll (310, 320). That is, the amount of refrigerant circulation can be increased by additionally supplying refrigerant gas to the compression chamber (C, C1) through the injection unit (500).

[0100] Such an injection section (500) can be formed on a non-rotating scroll (310). That is, the injection section (500) can supply refrigerant gas to a compression chamber (C, C1) formed between the non-rotating wrap (312) of the non-rotating scroll (310) and the rotating wrap (322) of the rotating scroll (320) while being formed on the non-rotating scroll (310).

[0101] Next, the detailed configuration of the injection unit (500) will be explained in more detail with reference to FIGS. 2 to 12.

[0102] First, the injection part (500) includes an injection hole (510) that penetrates the first plate part (311) of the non-rotating scroll (310).

[0103] The injection hole (510) may be formed to penetrate the first end plate section (311) vertically and open to the bottom of the first end plate section (311). The injection hole (510) is formed to be located between the scroll-shaped non-rotating wraps (312). That is, the injection hole (510) is formed to communicate with the compression chamber (C, C1) formed between the end plates (311, 321) and wraps (312, 322) of each scroll (310, 320).

[0104] In particular, the injection holes (510) are formed such that a plurality of them are positioned adjacent to each other. That is, a larger amount of refrigerant can be supplied into a single compression chamber through the plurality of injection holes (510) than when only one injection hole is provided.

[0105] As illustrated in FIGS. 9 to 12, the plurality of injection holes (510) are formed such that they are blocked by the pivot wrap (322) according to the pivoting operation of the pivot scroll (320), or at least one injection hole (510) is selectively opened to one of the compression chambers (C, C1). For example, each injection hole (510) is positioned to be kept closed by being blocked by the pivot wrap (322) by the operation of the pivot scroll (320), or to supply refrigerant gas while at least a portion is opened to one of the two adjacent compression chambers (C1, C2) by the pivot wrap (322).

[0106] This structure prevents pressure leakage between the two compression chambers (C, C1) by ensuring that multiple injection holes (510) are not simultaneously opened to the two compression chambers (C, C1). That is, refrigerant gas is supplied to only one of the two compression chambers (C, C1) located adjacent to each other by the swivel wrap (322), and the two compression chambers (C, C1) are not connected to each other by the injection holes (510).

[0107] Each injection hole (510) may be formed to have a diameter smaller than the thickness of the pivot wrap (322) of the pivot scroll (320) (distance between the inner wall and the outer wall, a distance in the direction perpendicular to the height). That is, each injection hole (510) is blocked and closed by the pivot wrap (322) of the pivot scroll (320). This structure also prevents the problem of pressure leakage between two adjacent compression chambers (C, C1) that are connected to each other by the injection hole (510) with respect to the pivot wrap (322).

[0108] Additionally, each of the injection holes (510) may be formed along a path where the pivot wrap (322) comes into close contact with the first plate portion (311). That is, each injection hole (510) is formed sequentially along the scroll shape of the pivot wrap (322). By arranging the injection holes (510) in this way, all injection holes (510) in the pivot wrap (322) of the pivot scroll (320) can be closed collectively.

[0109] Next, the injection unit (500) includes a buffer space (520).

[0110] The above buffer space (520) is provided to allow each injection hole (510) to communicate with one another. That is, each injection hole (510) can be communicated with one another by the buffer space (520). Thus, even though there are multiple injection holes (510), refrigerant can be supplied to each injection hole (510) collectively by supplying refrigerant gas to the buffer space (520).

[0111] The buffer space (520) is formed to be larger than the injection hole (510). Preferably, the buffer space (520) is formed to be large enough to accommodate all of the injection holes (510). Due to this structure, the refrigerant gas supplied to the buffer space (520) can pass through each injection hole (510) simultaneously and be supplied to the compression chamber (C, C1). In addition, due to the structure, the refrigerant gas supplied to the buffer space (520) can be supplied to the compression chamber (C, C1) through at least some of the injection holes (510).

[0112] The buffer space (520) may be formed to have an internal width (distance between two inner surfaces facing each other or distance between two diagonals of the inner surfaces) greater than the wrap thickness of the swivel wrap (322). This allows the amount of refrigerant gas supplied to each injection hole (510) to be maximized.

[0113] The buffer space (520) may be formed to be recessed from the outer surface of the non-rotating scroll (310). For example, the buffer space (520) may be formed to be recessed from the upper surface of the first plate section (411).

[0114] That is, the buffer space (520) can be formed in the same direction as the penetration direction of each injection hole (510). Thus, when forming the buffer space (520) and each injection hole (510), they can be formed by sequential drilling operations in the same direction without flipping the non-rotating scroll.

[0115] It is preferable that the recessed depth of the buffer space (520) be formed to a depth such that no deformation occurs on the surface (bottom) of the first top plate (311) due to the pressure of the compression chamber (C, C1). That is, if the buffer space (520) is formed to an excessive depth up to the surface of the first top plate (311), there is a risk that the area will be deformed by the pressure inside the compression chamber (C, C1). To prevent this, it is preferable that the buffer space (520) be formed to be recessed only to a thickness such that it is not deformed even by the pressure inside the compression chamber (C, C1).

[0116] Meanwhile, when the buffer space (520) is formed by being recessed from the upper surface of the first end plate (311), the upper side of the buffer space (520) is opened to the upper surface of the first end plate (311). Accordingly, after forming the buffer space (520), it is preferable to close the through portion of the buffer space (520) with a closing member (521) as shown in FIG. 8. By closing it with the closing member (521) in this way, the buffer space (520) can be provided as a space for temporarily storing refrigerant gas.

[0117] The above-mentioned closing member (521) may be formed to block the open portion of the buffer space (520) using a bolt structure. For example, the above-mentioned closing member (521) may be formed using a headless bolt to block the open portion of the buffer space (520).

[0118] Of course, as shown in FIG. 14, the closing member (521) may be formed into a cover structure to cover the open portion of the buffer space (520).

[0119] Next, the injection unit (500) includes an injection channel (530).

[0120] The injection channel (530) is a channel formed to supply refrigerant gas to the buffer space (520). That is, after the refrigerant gas is supplied to the buffer space (520) through the injection channel (530), it can be supplied into the compression chamber (C, C1) by passing through each injection hole (510) formed in the buffer space (520).

[0121] The injection channel (530) may be formed to penetrate toward the buffer space (520) from a direction perpendicular to the buffer space (520). For example, the injection channel (530) may be formed to penetrate from the periphery of the first end plate (311) forming the non-rotating scroll (310) to the buffer space (520). This allows the molding operation of the injection channel (530) to be performed in the same process as the molding operation of the buffer space (520) or each injection hole (510). That is, the buffer space (520), each injection hole (510), and the injection channel (530) can be molded without flipping the non-rotating scroll (310).

[0122] The injection channel (530) can be formed to have an inner diameter smaller than that of the buffer space (520). That is, the design freedom can be improved by allowing the injection channel (530) to be formed with a minimum diameter.

[0123] In particular, since the buffer space (520) is formed to have a wider width (internal width) than the injection channel (530), when each injection hole (510) is closed, a certain amount of refrigerant gas introduced through the injection channel (530) can be temporarily stored in the buffer space (520).

[0124] Meanwhile, an injection line (not shown) is connected to the injection channel (530), and through this injection line, refrigerant gas is supplied from a space separate from the suction space (S1) inside the case (100).

[0125] Although not shown, a flow shut-off valve or a check valve may be provided in the injection channel (530) or injection line. This allows the refrigerant gas to be supplied into the injection channel (530) only when the supply of refrigerant gas is required, or prevents the backflow of the refrigerant gas.

[0126] Meanwhile, the injection unit (500) may be provided as one or more than two as needed.

[0127] If the injection unit (500) is provided in multiple units, it may be arranged to supply refrigerant gas to different compression chambers (C, C1).

[0128] Of course, although not shown, injection holes (510) forming multiple injection sections (500) may be formed to be connected to one compression chamber in order to maximize the amount of refrigerant supplied to the compression chamber (C, C1).

[0129] In the following, the process of forming an injection part (500) on the non-rotating scroll (310) of the scroll compressor according to the aforementioned embodiment of the present invention is described.

[0130] First, a non-rotating scroll (310) is prepared in which the first end plate (311) and the non-rotating wrap (312) are formed. At this time, the first end plate (311) and the non-rotating wrap (312) may be in a state after being precisely formed through machining, or they may be in a state before performing the machining.

[0131] Then, an injection channel (530) is formed in the prepared non-rotating scroll (310). The injection channel (530) can be formed by first processing the inlet and then forming a channel that penetrates the inlet.

[0132] Next, a buffer space (520) is formed in the non-rotating scroll (310). The buffer space (520) can be formed to be recessed from the upper surface of the first end plate (311) by drilling or end milling.

[0133] In particular, the buffer space (520) may be formed to be in communication with the end of the injection channel (530).

[0134] Next, a plurality of injection holes (510) are formed in the non-rotating scroll (310). Each injection hole (510) may be formed to be located within the buffer space (520) and arranged side by side along the profile (scroll path) formed by the rotation wrap (322) of the rotation scroll (320).

[0135] Afterwards, the upper open portion of the buffer space (520) is closed with a closing member (521).

[0136] Accordingly, an injection part (500) is formed in the non-rotating scroll (310) by the aforementioned process.

[0137] Of course, the process of forming the injection section (500) may be performed in a different order than the order of the process described above. For example, the buffer space (520) and the injection hole (510) may be formed first, and then the injection channel (530) may be formed.

[0138] Next, the refrigerant compression process of a scroll compressor according to the aforementioned embodiment of the present invention will be described.

[0139] First, in the non-operational state where the scroll compressor is not operating, the non-rotating wrap (312) of the non-rotating scroll (310) and the rotating wrap (322) of the rotating scroll (320) are maintained in an interlocked state. That is, the rotating wrap (322) is received and positioned between the non-rotating wraps (312).

[0140] In this non-operational state, the end surface of the rotary wrap (322) may be spaced apart from the bottom surface of the first end plate (311) of the non-rotating scroll (310) and the end surface of the non-rotating wrap (312) may not be in contact with the upper surface of the second end plate (321) of the rotary scroll (320).

[0141] Additionally, in the non-operational state of the scroll compressor, the eccentric pin (231) of the rotation axis (230) is maintained in a connected state to the boss (323) of the pivot scroll (320).

[0142] When operation control for compressing refrigerant gas occurs while the scroll compressor is maintained in a non-operational state, the rotating shaft (230) is rotated by the drive of the electric motor (200), and the pivoting scroll (320) pivots between the main frame (400) and the non-pivoting scroll (310).

[0143] Due to the rotational movement of the rotational scroll (320), a compression chamber (C, C1) is created between the non-rotating wrap (313) of the non-rotating scroll (310) and the rotational wrap (322) of the rotational scroll (320). That is, a compression chamber (C, C1) is created between the two wraps (312, 322) by one wall surface of the rotational wrap (322) coming into contact with one wall surface of the non-rotating wrap (312).

[0144] In addition, refrigerant gas present in the suction space (S1) inside the case (100) is introduced into the compression chamber (C, C1) created as described above.

[0145] Subsequently, as the rotational movement of the rotational scroll (320) continues, the compression space of the compression chamber (C, C1) gradually decreases, and as a result, the refrigerant gas inside the compression chamber (C, C1) is gradually compressed and moved to the center of the non-rotational scroll (310).

[0146] Afterwards, the compressed refrigerant is discharged into the discharge space (S2) inside the case (100) through the discharge hole (313) formed in the center of the non-rotating scroll (310).

[0147] Meanwhile, if a larger amount of compression is required while the refrigerant gas is being compressed, or if certain conditions are met, an additional refrigerant gas is supplied to the injection path (530).

[0148] The refrigerant gas supplied in this way is provided to the buffer space (520) along the injection path (530), and is subsequently supplied to the compression chamber (C, C1) through each injection hole (510) connected to the buffer space (520).

[0149] Therefore, a larger amount of refrigerant can be added into the above compression chamber (C, C1).

[0150] In particular, each of the above injection holes (510) is positioned so that it is closed by being blocked by the pivoting wrap (322) by the pivoting motion of the pivoting wrap (322), or is opened to the compression chamber (C, C1) while at least a portion is moved away from the pivoting wrap (322).

[0151] For example, as shown in the attached Fig. 9, if the injection holes (510) are blocked and closed by the swivel wrap (322), refrigerant gas is not supplied into the compression chamber (C, C1).

[0152] On the other hand, as shown in the attached Fig. 10, when the rotating wrap (322) is moved away from the position where it blocks the injection hole (510), each injection hole (510) is opened and additional refrigerant gas is supplied into the compression chamber (C, C1).

[0153] As shown in the attached FIGS. 11 and 12, the pivot wrap (322) may be positioned to block only a part of the injection hole (510) while the pivoting operation is in progress. However, considering that each injection hole (510) is arranged sequentially along the profile (scroll path) of the pivot wrap (322), each injection hole (510) is positioned to communicate with only one of the two adjacent compression chambers (C, C1) and not with both compression chambers (C, C1). This prevents concerns regarding pressure leakage.

[0154] Ultimately, the scroll compressor of the present invention can increase the flow rate of refrigerant gas supplied into the compression chamber (C, C1) through the injection path (530) with minimal additional structural application.

[0155] In addition, the scroll compressor of the present invention can increase the number of injection holes (510) that supply refrigerant gas to the compression chamber without additionally providing an injection passage (530).

[0156] In addition, the scroll compressor of the present invention can improve work convenience by allowing the molding of injection holes (510) to be performed without flipping the non-rotating scroll due to the buffer space (520).

[0157] Meanwhile, the scroll compressor of the present invention can be implemented in various forms different from the aforementioned embodiments. These are explained for each embodiment as follows.

[0158] As an example according to another form of the scroll compressor of the present invention, the buffer space (520) may be formed in the shape of a slot that is long in one direction rather than a circular groove.

[0159] For example, as shown in the attached FIG. 13, the buffer space (520) can be formed as a long slot in the direction of arrangement of the injection holes (510).

[0160] Due to the shape of this buffer space (520), the arrangement of each injection hole (510) can be further diversified.

[0161] As another example according to a different form of the scroll compressor of the present invention, the injection hole (510) may be formed as a non-circular elongated hole.

[0162] For example, although not shown, the non-circular injection hole (510) can be formed as an arc-shaped slot. This allows a sufficiently large amount of refrigerant gas to be supplied through a single injection hole (510).

[0163] The above non-circular injection hole (510) may be formed to follow a part of the scroll shape formed by the pivot wrap (322) of the pivot scroll (320). That is, the above non-circular injection hole (510) may be formed as an elongated hole that follows the profile of the pivot wrap.

[0164] In particular, the non-circular injection hole (510) is formed with a width smaller than the turning wrap (322) of the turning scroll (320) and has a length longer than the width of the turning wrap (322), thereby enabling the supply of a larger amount of refrigerant gas than the circular injection hole (510).

[0165] Of course, it is preferable that the above-mentioned non-circular injection hole (510) be formed so that it is entirely blocked by the rotating wrap (322) or at least partially opened to one of the compression chambers (C, C1) depending on the rotational movement of the rotating scroll (320).

[0166] In addition, even when such a non-circular injection hole (510) is provided, a buffer space (520) that accommodates the injection hole (510) may be additionally formed, and the injection passage (530) may be formed to be connected to the buffer space (520). At this time, the buffer space (520) may be formed larger than the non-circular injection hole (510). That is, the inner diameter of the buffer space (520) may be formed larger than the length of the non-circular injection hole (510).

[0167] Thus, the injection part (500) of the scroll compressor of the present invention can be implemented in various forms.

[0168] In the foregoing, although all components constituting an embodiment according to the present invention have been described as being combined or operating in combination, the present invention is not necessarily limited to such embodiments. That is, within the scope of the purpose of the present invention, all such components may be selectively combined in one or more ways to operate. Furthermore, terms such as "include," "constitute," or "have" described above, unless specifically stated otherwise, mean that the relevant component may be inherent; thus, they should be interpreted as allowing for the inclusion of additional components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. Terms commonly used, such as those defined in advance, should be interpreted in accordance with their meaning in the context of the relevant technology and, unless explicitly defined in the present invention, should not be interpreted in an ideal or overly formal sense.

[0169] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

1. A non-rotating scroll having a first face plate and a non-rotating wrap protruding from the first face plate; A rotating scroll having a second tip plate and a rotating wrap protruding from the second tip plate and engaging with the non-rotating wrap to create a compression chamber between the non-rotating wrap; Injection part for supplying refrigerant gas to compression chambers formed between each of the above-mentioned non-rotating scrolls; is included, and The above injection unit is, A plurality of injection holes communicating with the above compression chamber, and An injection passage that penetrates from the outer surface of the first end plate portion to the portion where each injection hole is formed and supplies refrigerant gas to each injection hole, and A scroll compressor comprising a buffer space formed at the end of the injection channel and communicating each of the injection holes with one another.

2. In Paragraph 1, A scroll compressor in which the compression chambers created between the non-swivel wrap and the spin wrap according to the spin operation of the above-mentioned spin scroll are at least two or more.

3. In Paragraph 2, A scroll compressor in which each of the above injection holes is formed to be blocked by a swivel wrap according to the swivel motion of the swivel scroll, or at least one injection hole is positioned to be selectively opened in one of the compression chambers.

4. In Paragraph 1, A scroll compressor in which each injection hole is formed to have an inner diameter smaller than the lap thickness of the swivel lap.

5. In Paragraph 4, Each of the above injection holes is a scroll compressor formed along the path of a rotating wrap forming the above rotating scroll.

6. In Paragraph 1, Each of the above injection holes is a scroll compressor located in the space between the above non-swivel wraps.

7. In Paragraph 1, A scroll compressor in which the buffer space is formed to be larger than the wrap thickness of the aforementioned turning wrap.

8. In Paragraph 7, A scroll compressor in which the buffer space is formed to have a space large enough to accommodate all of the injection holes.

9. In Paragraph 1, The above buffer space is formed penetratingly from one outer surface of the first end plate portion of the above non-rotating scroll to a portion communicating with the injection hole.

10. In Paragraph 9, The above buffer space is a scroll compressor formed through a surface opposite to the surface where the non-rotating wrap protrudes among the first plate sections.

11. In Paragraph 9, A scroll compressor having a closing member provided on the outer surface of the first end plate portion to close the penetration portion of the buffer space.

12. In Paragraph 1, The above injection channel is formed to penetrate from the periphery of the first end plate portion.

13. In Paragraph 1, A scroll compressor in which the buffer space is formed to have a width greater than the inner diameter of the injection channel.

14. In Paragraph 1, The above buffer space is a scroll compressor formed in any one of the shapes of a polygon, a circle, an ellipse, or a track shape.

15. In Paragraph 1, The above injection section is a scroll compressor provided in multiple units.

16. In Paragraph 15, A scroll compressor formed such that the refrigerant gas supplied by the plurality of injection units is provided to different compression chambers.

17. A non-rotating scroll having a first mirror plate and a non-rotating wrap protruding from the first mirror plate; A rotating scroll having a second tip plate and a rotating wrap protruding from the second tip plate and engaging with the non-rotating wrap to create a compression chamber between the non-rotating wrap; Injection part for supplying refrigerant gas to compression chambers formed between each of the above-mentioned non-rotating scrolls; is included, and The above injection unit is, A non-circular injection hole communicating with the above compression chamber, and An injection passage that penetrates from the outer surface of the first end plate portion to the portion where the non-circular injection hole is formed and supplies external refrigerant gas to the non-circular injection hole, and A scroll compressor comprising a buffer space formed at the end of the injection channel and communicating with the non-circular injection hole, having an internal space width greater than the internal space width of the non-circular injection hole.

18. In Paragraph 17, A scroll compressor in which the above-mentioned non-circular injection hole is formed to have a width smaller than the wrap thickness of the above-mentioned spiral wrap and a length longer than the wrap thickness.

19. In Paragraph 17, A scroll compressor in which the above-mentioned non-circular injection hole is formed such that, depending on the rotational movement of the above-mentioned rotational scroll, the entire hole is blocked by the rotational wrap or at least a portion is selectively opened to one of the compression chambers.

20. In Paragraph 17, A scroll compressor in which the buffer space is formed to have a size sufficient to accommodate the entire non-circular injection hole.

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