Compressor and refrigeration cycle apparatus having the same

Abstract

A refrigeration cycle apparatus includes a compressor. The compressor can include a housing, a driving unit provided in the housing, a compression unit coupled to the driving unit and configured to compress a refrigerant, and a valve configured to control a flow of the refrigerant in the housing, wherein the valve includes a valve chamber including a main flow path through which the refrigerant flows and having a refrigerant inlet and a refrigerant outlet, a float body arranged in the valve chamber for opening / closing the main flow path, and a bypass flow path formed in the valve chamber to be opened / closed by the float body and configured to bypass the refrigerant through the bypass flow path when the driving unit is stopped and the bypass flow path is opened by the float body.

Description

Technical Field

[0001] This disclosure relates to compressors, and for example to compressors having a structure that more easily blocks the refrigerant backflow and achieves balanced pressure. This disclosure also relates to refrigeration cycle apparatus having such compressor. Background Technology

[0002] The compressor, one of the components constituting a refrigeration cycle device, is a device used to convert low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas by using power received from an electric motor via a rotating shaft. In a structure that seals the drive unit and the compression unit in a housing, the compressor may stop momentarily due to various reasons such as external electric shock, excessive refrigerant intake flow, abnormal valve behavior, or pressure pulsations in the cycle.

[0003] In the case where the compressor stops operating, a pressure difference may exist between the compressor's relatively high-pressure internal space and the relatively low-pressure compression chamber because the discharge path for discharging refrigerant gas from the compression chamber into the compressor's internal space is blocked by the discharge valve.

[0004] When the pressure difference cannot be resolved, refrigerant backflow, oil leakage, and other problems may occur. Furthermore, if an attempt is made to restart the compressor after it has stopped, before the pressure in the internal space and the pressure in the compression chamber have reached equilibrium (balance pressure), the pressure difference between the internal space and the compression chamber will be greater than the pressure difference required for the compressor to operate, and therefore the restart may fail. Additionally, when the compressor restarts, it may consume a significant amount of time and energy to bring the refrigeration cycle back to a stable state. Therefore, a device may be needed that can quickly bring the evaporating and condensing pressures to equilibrium when the compressor stops.

[0005] In other words, there is a need for a device for a compressor and a refrigeration cycle system having the compressor, in which pressure balance in the compressor can be quickly achieved to prevent refrigerant backflow and oil leakage, and to allow the compressor to be quickly restarted or put back into operation. Summary of the Invention

[0006] Technical problems to be solved

[0007] Additional aspects will be set forth in part in the description which follows, and will be understood in part from the description, or may be learned by practice of the exemplary embodiments.

[0008] The aspects of this disclosure may relate to apparatus for compressors and for refrigeration cycle devices having said compressors, wherein pressure balance in the compressor can be quickly achieved to prevent refrigerant backflow and oil leakage, and to enable the compressor to be quickly restarted or restarted.

[0009] Technical solution

[0010] According to one aspect of this disclosure, a compressor may include: a housing; a drive unit disposed within the housing; a compression unit coupled to the drive unit and configured to compress a refrigerant; and a valve configured to control the flow of the refrigerant within the housing. The valve may include: a valve chamber including a main flow path in which the refrigerant will flow, the main flow path including a refrigerant inlet and a refrigerant outlet; a float disposed within the valve chamber for opening or closing the main flow path; and a bypass flow path formed within the valve chamber and opened or closed by the float. When the drive unit stops and the bypass flow path is opened by the float, the bypass flow path will allow the refrigerant to be bypassed or diverted to the bypass flow path.

[0011] The floating body can be configured to open the main flow path when the drive unit operates during the operation of the compressor. The floating body can also be configured to close the main flow path and open the bypass flow path when the drive unit (or compressor) stops.

[0012] The bypass path may include a bypass inlet and a bypass outlet. The floating body may be configured to close at least one of the bypass inlet and the bypass outlet when the drive unit is operating during the operation of the compressor. The floating body may be configured to close at least one of the refrigerant inlet and the refrigerant outlet when the drive unit (or compressor) stops.

[0013] The valve may also include an elastic member configured to elastically pressurize the floating body, such that the floating body closes the refrigerant inlet when the drive unit (or compressor) stops.

[0014] The compressor may also include a sealing member disposed between the valve chamber and the floating body to prevent the refrigerant from leaking into the bypass path during operation of the compressor (or drive unit).

[0015] The refrigerant inlet may be formed in the lower (bottom) portion of the valve chamber, and the refrigerant outlet may be formed in the upper (top) portion of the valve chamber. The elastic member may be disposed between the upper portion of the valve chamber and the floating body, and the bypass flow path may be disposed along the circumferential surface of the floating body.

[0016] The floating body may include multiple floating bodies, and the multiple floating bodies may include a first floating body disposed in the upper part of the valve chamber and a second floating body disposed below the first floating body.

[0017] The valve may further include a fixed body disposed within the valve chamber to allow the refrigerant to flow along the main flow path or the bypass flow path. A first floating body may be disposed above (or on top of) the fixed body to open or close the main flow path, and a second floating body may be disposed within the interior space of the fixed body to open or close the bypass flow path.

[0018] Each of the plurality of floating bodies may include a hollow portion. The first floating body may include a first floating body hollow portion formed to be smaller than the refrigerant outlet of the valve chamber, and the second floating body may include a second floating body hollow portion formed to be smaller than the inlet of the stationary body.

[0019] The floating body may include a first floating body disposed on a first side of the valve chamber and a second floating body disposed on a second side of the valve chamber. A bypass flow path may be formed between at least one of the first and second floating bodies and the valve chamber. The compressor may also include a sealing member disposed in the region where the bypass flow path is formed to prevent refrigerant leakage from the bypass flow path when the drive unit (or compressor) stops.

[0020] The compressor may further include: a compression chamber configured to compress the refrigerant; and a refrigerant suction pipe configured to draw the refrigerant into the compression chamber. The valve may be disposed between the interior space of the housing and the refrigerant suction pipe, such that the bypass flow path discharges (releases) the refrigerant from the interior space of the housing into the refrigerant suction pipe.

[0021] The sealing component may contain Teflon.

[0022] According to one aspect of this disclosure, a refrigeration cycle apparatus may include: a condenser; an expander connected to the condenser; an evaporator connected to the expander; a compressor connected to the evaporator and configured to compress a refrigerant; and a valve disposed outside or inside at least one of the compressor and configured to control the flow of the refrigerant in the compressor. The valve may include: a valve chamber including a refrigerant inlet and a refrigerant outlet; a float disposed in the valve chamber and configured to control the flow of the refrigerant into and out of the valve chamber; and a bypass flow path formed in the valve chamber to be opened or closed based on movement of the float. When the compressor stops and the bypass flow path is opened based on movement of the float, the bypass flow path may allow the refrigerant to be bypassed or diverted to the bypass flow path, the bypass flow path including a bypass inlet and a bypass outlet.

[0023] The floating body can be configured to close the bypass path when the compressor (or drive unit) is running (during operation of the compressor or drive unit), and can be configured to open the bypass path when the compressor (or drive unit) stops.

[0024] The valve may further include a main flow path formed in the valve chamber to allow the refrigerant to flow from the refrigerant inlet to the refrigerant outlet. The valve may also include a resilient member configured to resiliently pressurize the main flow path formed in the valve chamber and the float, and the resilient member may be disposed between the valve chamber and the float such that the float closes the main flow path when the compressor (or drive unit) stops.

[0025] According to one aspect of this disclosure, a refrigeration cycle apparatus may include: a condenser; an expander connected to the condenser; an evaporator connected to the expander; a compressor connected to the evaporator; and a valve, the valve being arranged or disposed at least one of the exterior and interior of the compressor. The valve may include: a valve housing; a float disposed within the valve housing; a main flow path formed in the valve housing and including a refrigerant inlet and a refrigerant outlet to allow refrigerant flow; and a bypass flow path including a bypass inlet and a bypass outlet for allowing refrigerant to be bypassed or diverted to the bypass flow path when the main flow path is blocked or closed. The float may open the main flow path and block or close the bypass flow path during operation of the compressor, and block or close the main flow path and open the bypass flow path when the compressor stops.

[0026] The bypass flow path can be formed between the valve housing and the floating body.

[0027] The floating body can close or block at least one of the bypass inlet and the bypass outlet during operation of the compressor or drive unit, and the floating body can close or block at least one of the refrigerant inlet or the refrigerant outlet when the compressor (or drive unit) stops.

[0028] An elastic member may be arranged or disposed between the valve housing and the floating body, and is configured to elastically pressurize the floating body such that the floating body blocks or closes the refrigerant inlet when the compressor or drive unit stops.

[0029] The valve may also include a sealing member arranged or disposed between the valve housing and the floating body to prevent the refrigerant from leaking into the bypass path during operation of the compressor.

[0030] Beneficial effects

[0031] One aspect of this disclosure provides a compressor capable of effectively removing the compression load from the compressor housing and a refrigeration cycle apparatus having the compressor.

[0032] Another aspect of this disclosure provides a compressor capable of rapidly achieving pressure equalization within its housing for restarting from a stopped state, and a refrigeration cycle apparatus having the compressor.

[0033] Another aspect of this disclosure provides a compressor and refrigeration cycle device with reduced material and manufacturing costs. Attached Figure Description

[0034] The above and other aspects, features and advantages of some embodiments of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 The illustration shows a compressor and a refrigeration cycle apparatus including the compressor according to an embodiment of the present disclosure.

[0036] Figure 2 The diagram shows... Figure 1 The compressor.

[0037] Figure 3 yes Figure 1 A cross-sectional view of the compressor.

[0038] Figure 4 The illustration shows that in Figure 1 The valves during the operation of the compressor.

[0039] Figure 5 yes Figure 4 An exploded view of the valve.

[0040] Figure 6 Is Figure 1 A cross-sectional view of the valve during compressor operation.

[0041] Figure 7 The illustration shows when Figure 1 The valve that controls when the compressor stops.

[0042] Figure 8 Is when Figure 1 A cross-sectional view of the valve when the compressor stops.

[0043] Figure 9 This is a cross-sectional view of the valve when the compressor stops, according to an embodiment of the present disclosure.

[0044] Figure 10 This is a schematic cross-sectional view of a valve during compressor operation, according to an embodiment of the present disclosure.

[0045] Figure 11 Is when Figure 10 A schematic cross-sectional view of the valve when the compressor stops.

[0046] Figure 12 This is a schematic cross-sectional view of a valve during compressor operation, according to an embodiment of the present disclosure.

[0047] Figure 13 Is when Figure 12 A schematic cross-sectional view of the valve when the compressor stops.

[0048] Figure 14 This is a schematic cross-sectional view of a valve during compressor operation, according to an embodiment of the present disclosure.

[0049] Figure 15 Is when Figure 14 A schematic cross-sectional view of the valve when the compressor stops.

[0050] Figure 16 This is a cross-sectional view of a compressor according to an embodiment of the present disclosure.

[0051] Figure 17 Is Figure 16 A schematic cross-sectional view of the valve during the operation of the compressor.

[0052] Figure 18 Is when Figure 16 A schematic cross-sectional view of the valve when the compressor stops. Detailed Implementation

[0053] The embodiments and features described and illustrated in this disclosure are merely examples, and various modifications may be made to replace the embodiments and figures of this disclosure.

[0054] Throughout the accompanying drawings, the same reference numerals refer to the same parts or components.

[0055] The terminology used herein is for the purpose of describing exemplary embodiments and is not intended to limit this disclosure. It will be understood that, unless the context clearly specifies otherwise, the singular forms “a,” “an,” “the,” and “the” include plural references. It will also be understood that the terms “comprising” and / or “including,” as used in this specification, specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0056] Ordinal terms such as “first” and “second” can be used to explain various different components, but components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, without departing from the teachings of this disclosure, the first element, component, region, layer, or space discussed below may be referred to as the second element, component, region, layer, or segment. When the conjunction “and / or” and the like are used to describe items, the description should be understood to include any and all combinations of one or more of the associated listed items. That is, the term “and / or” includes multiple combinations of related items or any one of multiple related items. For example, the scope of the expression or phrase “A and / or B” includes all of the following: (1) item “A”; (2) item “B”; and (3) combinations of items “A and B”.

[0057] Furthermore, the scope of the expression or phrase “at least one of A and B” is intended to include all of the following: (1) at least one of A; (2) at least one of B; and (3) at least one A and at least one B. Similarly, the scope of the expression or phrase “at least one of A, B and C” is intended to include all of the following: (1) at least one of A; (2) at least one of B; (3) at least one of C; (4) at least one of A and at least one of B; (5) at least one of A and at least one of C; (6) at least one of B and at least one of C; and (7) at least one of A, at least one of B and at least one of C.

[0058] When an element is described in this disclosure as being “connected to” or “linked to” another element, the statement covers examples of direct connection or linking, as well as connections or links in which another element is inserted.

[0059] The terms “forward (or front),” “backward (or rear),” “left” and “right” as used herein are defined with respect to the accompanying drawings, but these terms may not constrain the shape and position of the corresponding parts.

[0060] Reference will now be made in detail to embodiments of the present disclosure illustrated in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout.

[0061] According to this disclosure, a compressor and a refrigeration cycle device including the compressor can be provided, which uses a simple structure to maintain balanced pressure as quickly as possible in a stopped state by removing the compression load in the compressor.

[0062] According to this disclosure, a compressor and refrigeration cycle device with reduced material and manufacturing costs can be provided.

[0063] Figure 1 A refrigeration cycle apparatus according to an embodiment of the present disclosure is shown.

[0064] refer to Figure 1 The refrigeration cycle device 1 includes a compressor 10, a condenser 20, an expander 30, and an evaporator 40. This refrigeration cycle device 1 allows the refrigerant to circulate through a series of processes including compression, condensation, expansion, and evaporation, and enables the refrigerant and the object to be cooled to exchange heat with each other in order to cool the object.

[0065] The compressor 10 compresses the refrigerant gas to a high temperature and high pressure state and discharges the refrigerant gas, which then flows into the condenser 20. The condenser 20 condenses the compressed refrigerant into a liquid state and radiates heat to the surrounding environment through the condensation process.

[0066] Expander 30 expands the high-temperature, high-pressure liquid refrigerant condensed by condenser 20 into a low-pressure liquid refrigerant. Evaporator 40 evaporates the refrigerant expanded by expander 30. Evaporator 40 achieves a cooling effect by exchanging heat with the object to be cooled using the latent heat of vaporization of the refrigerant, and then returns the low-temperature, low-pressure refrigerant gas to compressor 10. Using this cycle, a refrigeration cycle device for cooling the object to be cooled can be provided.

[0067] Compressor 10, condenser 20, expander 30, and evaporator 40 are connected by pipes to allow refrigerant to pass through. The refrigerant passing through compressor 10 is in a gaseous state, and the refrigerant passing through expander 30 is in a liquid state. The pipes connected to compressor 10 are referred to as gas-side pipes 15 and 25, and the pipes connected to expander 30 are referred to as liquid-side pipes 35 and 45.

[0068] Gas-side pipes 15 and 25 include a first gas-side pipe 15 connecting the condenser 20 to the compressor 10, and a second gas-side pipe 25 connecting the evaporator 40 to the compressor 10. The first gas-side pipe 15 may be referred to as connecting pipe 15. Liquid-side pipes 35 and 45 include a first liquid-side pipe 45 connecting the condenser 20 to the expander 30, and a second liquid-side pipe 35 connecting the evaporator 40 to the condenser 30.

[0069] Figure 2 The illustration shows a compressor according to an embodiment of the present disclosure, and Figure 3 yes Figure 2 A cross-sectional view of the compressor.

[0070] Although the compressor is described in this specification based on a rotary compressor for ease of explanation, the embodiments of this disclosure are not limited to rotary compressors, but can be applied to a variety of other types of compressors.

[0071] refer to Figures 2 to 3 The refrigerant discharged from the evaporator 40 can travel through the accumulator 50 and then flow into the compressor 10. The accumulator 50 can be arranged adjacent to the compressor 10, and the accumulator 50 and the compressor 10 can be connected via a suction pipe 54. Furthermore, a discharge pipe 12 can be provided on one side of the compressor 10, which discharges the compressed refrigerant and connects to the condenser 20. The suction pipe 54 can be a refrigerant suction pipe that draws refrigerant into the compression chambers 72 and 74.

[0072] An accumulator 50 can be installed to prevent some of the low-temperature, low-pressure refrigerant discharged from the evaporator 40 from flowing into the compressor 10, as it remains in a liquid state instead of a gaseous state. The refrigerant discharged from the evaporator 40 flows into the accumulator 50 through the connecting pipe 52. Because the compressor 10 has difficulty compressing liquid refrigerant, it only allows gaseous refrigerant to flow from the accumulator 50 into the compressor 10. That is, the liquid refrigerant remains in the accumulator, and the gaseous refrigerant flows into the compressor 10.

[0073] The low-temperature, low-pressure refrigerant gas flowing into compressor 10 can be compressed within compressor 10 and then discharged into connecting pipe 15. The high-temperature, high-pressure refrigerant gas exiting compressor 10 can flow into condenser 20 through connecting pipe 15. The pressure of the refrigerant gas before compression is the evaporation pressure, and the pressure of the compressed refrigerant gas flowing into condenser 20 can be called the condensation pressure. The condensation pressure is higher than the evaporation pressure.

[0074] The compressor 10 includes a housing 11, a compression unit 70 disposed in the housing 11, and a drive unit 60. The drive unit 60 may be installed in the upper part of the housing 11, and the compression unit 70 may be installed in the lower part of the housing 11.

[0075] The drive unit 60 may include a cylindrical stator 61 fixed to the inner surface of the housing 11, and a rotor 62 rotatably mounted within the stator 61. A rotating shaft 63 may be press-fitted and connected to the center of the rotor. When power is applied, the rotor 62 and the rotating shaft 63 connected to it rotate, thereby driving the compression unit 70. In this case, the drive unit 60 can operate at various speeds. In other words, the rotor 62 can rotate at various speeds, and the compression unit 70 can receive rotational power accordingly.

[0076] The compression unit 70 may include cylinders 76 and 78 and rolling pistons 80 and 82, which form compression chambers 72 and 74. The rolling pistons 80 and 82 receive power from the drive unit 60 and surround the compression chambers 72 and 74. Multiple cylinders 76 and 78 may be provided, and correspondingly, multiple compression chambers 72 and 74 may be formed, separated from each other. Furthermore, the compression unit 70 may include multiple plates 84, 86, and 88 covering the top and bottom of the multiple cylinders 76 and 78, thereby collectively forming the compression chambers 72 and 74.

[0077] The plurality of plates 84, 86 and 88 may include a first plate 84 disposed in the uppermost portion, a second plate 86 disposed below the first plate 84, and a third plate 88 disposed below the first plate 84 and the second plate 86. The second plate 86 may be disposed between the first plate 84 and the third plate 88.

[0078] exist Figure 3 The figure shows a first cylinder 76 and a second cylinder 78 positioned between the first cylinder 76 and the bottom of the housing 11. Accordingly, the first cylinder 76 may form a first compression chamber 72, and the second cylinder 78 may form a second compression chamber 74. A first rolling piston 80 and a second rolling piston 82 may be positioned in the first compression chamber 72 and the second compression chamber 74, respectively. Furthermore, plates 84, 86, and 88 may include a top plate 84 disposed above the first cylinder 76, a bottom plate 88 disposed below the second cylinder 78, and an intermediate plate 86 located between the first cylinder 76 and the second cylinder 78. However, the number and shape of the plurality of cylinders 76 and 78, the plurality of compression chambers 72 and 74, and the plurality of plates 84, 86, and 88 are not limited to those shown in the figures.

[0079] A rotating shaft 63 extending from the drive unit 60 can be mounted by passing through or traveling through the center of the first compression chamber 72 and the second compression chamber 74. The rotating shaft 63 can be connected to a first rolling piston 80 and a second rolling piston 82 arranged in the first compression chamber 72 and the second compression chamber 74.

[0080] The first rolling piston 80 and the second rolling piston 82 can be connected to the rotating shaft 63 and can rotate eccentrically within the compression chambers 72 and 74. Using this structure, the first rolling piston 80 and the second rolling piston 82 can rotate eccentrically within the compression chambers 72 and 74, and can compress the fluid to be compressed. Furthermore, the first rolling piston 80 and the second rolling piston 82 can be connected together with eccentricities in different directions. For example, the first rolling piston 80 and the second rolling piston 82 can compress the refrigerant with a 180-degree phase difference.

[0081] The compressor 10, which includes these eccentrically rotating rolling pistons 80 and 82, is called a rotary compressor.

[0082] An oil reservoir 90 can be provided at the bottom of the housing 11 to store some oil that is in contact with one end of the rotating shaft 63. The oil moves upward along the rotating axis and flows back downward, thereby reducing friction in the compression unit 70, etc.

[0083] For compressor 10 to operate, the pressure difference between the internal space 14 pressure P2 and the compression chambers 72 and 74 pressure P1 should not be too large. In other words, compression cannot be performed when the pressure difference P2-P1 between the internal space 14 and the compression chambers 72 and 74 is greater than the pressure difference P2′-P1′ required for the compressor to operate. When the pressure difference P2-P1 between the internal space 14 and the compression chambers 72 and 74 is greater than the pressure difference P2′-P1′ required for the compressor to operate, the drive unit 60 may be overloaded because the discharge valve 16, which will be described later, is not open. That is, when (P2-P1) > (P2′-P1′), the discharge valve 16 may not be open, and therefore the drive unit 60 may be overloaded.

[0084] The compressor 10 may include an overload protection device 13 connected to the drive unit 60 to prevent the drive unit 60 from malfunctioning due to overload.

[0085] When the overload protection device 13 is activated or in operation, the operation of the refrigeration cycle device 1 can be stopped. In other words, the overload protection device 13 can stop the rotating shaft 63 of the compressor 10 and the motor (not shown) that drives the rotating shaft 63. The overload protection device 13 can be arranged above the housing 11.

[0086] When compressor 10 stops operating, the compression chambers 72 and 74, as well as the internal space 14 of the compressor, need to quickly equalize their pressure in order to restart compressor 10 rapidly. If compressor 10 remains stopped, problems such as oil leaks may occur. Therefore, compressor 10 needs to quickly restart by equalizing the pressure of the relatively low-pressure compression chambers 72 and 74 with the relatively high-pressure internal space 14.

[0087] For example, compressor 10 may include a discharge valve 16 and a discharge path 17 for discharging refrigerant compressed by compression chambers 72 and 74. Discharge valve 16 may be arranged on top of the first plate 84. However, the location of discharge valve 16 is not limited thereto.

[0088] When the drive unit 60 operates, the rolling pistons 80 and 82 can compress the refrigerant gas in the compression chambers 72 and 74 while rotating. The discharge valve 16 is closed during the operation of the compressor 10, and the pressure P2 in the internal space 14 can be higher than the pressure P1 in the compression chambers 72 and 74. The refrigerant gas in the compression chambers 72 and 74 reaches a constant pressure. At this time, the discharge valve 16, which blocks the discharge path 17, can be opened. In this way, refrigerant gas can be discharged into the internal space 14 of the compressor through the discharge path 17. In other words, the discharge valve 16 can open the discharge path 17 to allow refrigerant gas from the compression chambers 72 and 74 to flow into the internal space 14.

[0089] Conversely, when the drive unit 60 suddenly stops for various reasons, the discharge valve 16 can block the discharge path 17 to prevent the backflow of refrigerant gas. When the discharge path 17 is blocked, the internal space 14 and the compression chambers 72 and 74, which are already connected to each other, are separated, and thus a pressure difference can exist between the spaces. For example, the internal space 14 can have a relatively high pressure, while the compression chambers 72 and 74 can have a relatively low pressure.

[0090] As examples of various reasons, when the pressure difference between the compression chamber pressure P1 and the internal space pressure P2 becomes too large, the drive unit 60 may be overloaded, and the overload protection device 13 may be operated or activated. The overload protection device 13 stops the drive unit 60 to remove the compression load in the compression unit 70. At this time, the discharge valve 16 may block the discharge path 17, and a pressure difference may exist between the internal space 14 and the compression chambers 72 and 74.

[0091] In this situation, the compressor 10 may not be able to restart if the compression load on the drive unit 60 is not quickly removed. For example, if the pressure P1 in the compression chamber and the pressure P2 in the internal space do not reach the required pressure equilibrium, the refrigeration cycle unit 1 will not restart.

[0092] However, when the time required for pressure equalization increases, compressor 10 and / or the refrigeration cycle equipment 1 including compressor 10 may encounter problems such as refrigerant backflow, oil leakage, and decreased efficiency of the refrigeration cycle equipment. Therefore, the time required to achieve balanced pressure should be reduced or shortened to avoid problems such as refrigerant backflow, oil leakage, and decreased efficiency of the refrigeration cycle equipment.

[0093] The refrigeration cycle device 1 may also include a valve 100 for rapidly reaching equilibrium pressure. Valve 100 brings the relatively higher pressure P2 in the internal space 14 compared to the pressures in the compression chambers 72 and 74 due to the compressor 10 stopping closer to the pressure P1 in the compression chambers 72 and 74. Valve 100 can reduce the time required to reach equilibrium pressure.

[0094] Specifically, such as Figure 3 As shown, when the internal space 14 is under high pressure and the compression chambers 72 and 74 are under low pressure before the compression of the refrigerant gas, the discharge valve 16 can be in a blocked state. Furthermore, the valve 100 can be connected to both the internal space 14 of the compressor and the external space of the compressor 10. The internal space 14 is a relatively high-pressure space where the compressed refrigerant gas is present, while the external space of the compressor 10 is a relatively low-pressure space where the refrigerant gas is present before compression. The valve 100 can connect the high-pressure side of the compressor's internal space 14 to the low-pressure side of the compressor's external space. In this way, the refrigerant gas can be discharged from the internal space 14 to the external space of the compressor through the valve 100. The valve 100 and the external space can be connected via a bypass outlet pipe 101b. The bypass outlet pipe 101b can be connected to a connecting pipe 52. The refrigerant flowing through the bypass outlet pipe 101b to the connecting pipe 52 can flow back to the compressor 10 through the accumulator 50.

[0095] The pressure in the compressor's external space can be equal to or approximately equal to the pressure in compression chambers 72 and 74 before the refrigerant gas is compressed. That is, the compressor's external space can be a space with a lower pressure than that in the internal space 14. For example, the compressor's external space can be the connecting pipe 52. However, it is not limited to this, and the compressor's external space can be the second gas-side pipe 25, the accumulator 50, or the suction pipe 54. In other words, the bypass outlet pipe 101b can also be connected to the second gas-side pipe 25, the accumulator 50, or the suction pipe 54.

[0096] Although Figure 3In the diagram, valve 100 is shown connected to an external space via a bypass outlet pipe 101b, but is not limited thereto. Rather, valve 100 may be directly connected to an external space depending on its location, or valve 100 itself may be located outside the housing 11. Furthermore, bypass inlet 161, which will be described later, may be directly connected to the internal space 14, or connected to the internal space 14 via an additional pipe, allowing high-pressure refrigerant gas to flow into valve 100.

[0097] Furthermore, when the compressor 10 stops, the valve 100 can be used to prevent refrigerant from flowing back from the outside of the compressor 10 towards the internal space 14. That is, the valve 100 can prevent refrigerant from flowing backward from the condenser 20 side to the compressor 10 side. In embodiments of this disclosure, the valve 100 can independently block the backflow of refrigerant without additional check valves and solenoid valves, and facilitates the rapid attainment of equilibrium pressures P1 in the compression chambers 72 and 74 with P2 in the internal space 14, thereby saving on compressor manufacturing and material costs. The movement of the valve 100 will be described in detail later.

[0098] Although valve 100 is Figure 3 The valve 100 is shown in the housing 11, but is not limited thereto; it can be arranged in various different locations to facilitate rapid attainment of equilibrium pressure and prevent refrigerant backflow. For example, the valve 100 can also be arranged outside the housing 11. For example, the valve 100 can be arranged at the connecting pipe 15.

[0099] Figure 4 The illustration shows that in Figure 1 The valve during the operation of compressor 10. Figure 5 yes Figure 4 An exploded view of the valve. Figure 6 Is Figure 1 A cross-sectional view of the valve during the operation of the compressor 10.

[0100] refer to Figures 4 to 6 Valve 100 may include a plurality of valve housings 101, 102, and 103 forming the exterior. Valve housings 101, 102, and 103 may include a first housing 101, a second housing 102, and a third housing 103. The first housing 101 may be an upper housing 101, the second housing 102 may be an intermediate housing 102, and the third housing 103 may be a lower housing 103. In other words, the first housing 101 may form the appearance of the upper portion of valve 100, the second housing 102 may form the appearance of the middle portion of valve 100, and the third housing 103 may form the appearance of the lower portion of valve 100. Although the plurality of valve housings 101, 102, and 103 are... Figure 4 They are formed separately, but they are not limited to this and can be integrated into a single unit.

[0101] The multiple valve housings 101, 102, and 103 may have a cylindrical shape. However, the shapes of the multiple valve housings 101, 102, and 103 are not limited to this, and they may have various different forms.

[0102] Refrigerant outlet 152, refrigerant outlet pipe 101a, and bypass outlet pipe 101b can be formed at the first housing 101. Refrigerant outlet pipe 101a and bypass outlet pipe 101b can extend vertically. Furthermore, refrigerant outlet pipe 101a and bypass outlet pipe 101b can be formed in a cylindrical shape. However, they are not limited to this; refrigerant outlet pipe 101a and bypass outlet pipe 101b can be formed in various other shapes that allow refrigerant flow. Refrigerant outlet 152 allows refrigerant gas to be discharged from the internal space 14 side to the condenser 20 side.

[0103] The second housing 102 may receive the sealing member 140 and the floating body 120. The second housing 102 may be arranged vertically between the first housing 101 and the third housing 103. However, it is not limited thereto; at least one of the first housing 101 or the third housing 103 may be omitted, or the second housing 102 may be arranged horizontally between the first housing 101 and the third housing 103.

[0104] The second housing 102 may include multiple portions. These portions may include a first portion 102a, a second portion 102b, a third portion 102c, and a fourth portion 102d. The first portion 102a may be the portion to be coupled to the first housing 101. The second portion 102b may be connected between the first portion 102a and the third portion 102c. The second portion 102b may be an inclined portion 102b. The third portion 102c may be connected between the second portion 102b and the fourth portion 102d. In the fourth portion 102d, a floating body 120, a sealing member 140, and an elastic member 130, which will be described later, may be arranged. The fourth portion 102d may have the largest area among the multiple portions.

[0105] The inclined portion 102b may be inclined upward toward the first housing 101 to guide the refrigerant from the refrigerant inlet 151 to the refrigerant outlet 152. In other words, the inclined portion 102b may have a smaller or reduced cross-sectional area from the third portion 102c toward the first portion 102a.

[0106] In the second housing 102, a bypass inlet 161 and a connecting flow path 180 may be formed.

[0107] The third housing 103 may include a bottom wall 103a, an extension wall 103b, and a base 103c. A refrigerant inlet 151 may be formed at the bottom wall 103a. The refrigerant inlet 151 may be formed between the bottom wall 103a and the extension wall 103b. The refrigerant inlets 151 may be separate from each other and may be configured as a plurality of refrigerant inlets 151, for example, wherein the bottom wall 103a is disposed between adjacent refrigerant inlets 151. However, it is not limited thereto, and the plurality of refrigerant inlets 151 may be connected to form a single refrigerant inlet 151. The extension wall 103b may protrude upward from the base 103c. The base 103c may be disposed at the lowest portion of the third housing 103. The base 103c may support the first housing 101 and the second housing 102. The refrigerant inlet 151 may allow refrigerant gas to flow in from the internal space 14 or from the accumulator 50 side.

[0108] Valve housings 101, 102, and 103 can form valve chamber 110. Main flow path 150 can be formed in valve chamber 110. However, valve chamber 110 can be formed not only by valve housings 101, 102, and 103, but also by components in compressor 10. For ease of explanation, it is now assumed that valve housings 101, 102, and 103 exist.

[0109] Valve 100 may include a main flow path 150 in which refrigerant flows. The main flow path 150 may be formed inside valve housings 101, 102, and 103. In other words, the main flow path 150 may be formed in valve chamber 110. The main flow path 150 may include a refrigerant inlet 151 and a refrigerant outlet 152. During operation of compressor 10, refrigerant flowing in from refrigerant inlet 151 may travel through valve chamber 110 and flow out through refrigerant outlet 152. In valve 100, refrigerant inlet 151 may be connected to internal space 14 to discharge refrigerant from the high-pressure internal space 14 to the low-pressure external space of compressor 10, and refrigerant outlet 152 may be connected to the outside of housing 11 via refrigerant outlet pipe 101a. Specifically, refrigerant outlet 152 may be connected to connecting pipe 52 or suction pipe 54. However, it is not limited to this; refrigerant outlet 152 may be connected to any location in a low-pressure area or space.

[0110] The main flow path 150 may include a first main flow path 153 and a second main flow path 154. The first main flow path 153 may be formed in the region corresponding to the first portion 102a, the second portion 102b, and the third portion 102c. The second main flow path 154 may be formed in the region corresponding to the fourth portion 102d. The first main flow path 153 and the second main flow path 154 may be internal flow paths 156 formed in the valve chamber 110.

[0111] Valve 100 may include a float 120 and a sealing member 140.

[0112] The floating body 120 can be arranged in the valve chamber 110. Specifically, the floating body 120 can be arranged in the second housing 102. The floating body 120 can be arranged in the fourth section 102d and can move up and down. When the refrigerant flows along the direction from the third housing where the refrigerant inlet 151 is formed to the first housing 101 where the refrigerant outlet 152 is formed during the operation of the compressor 10, the floating body 120 can be arranged in the upper part of the fourth section 102d. In this case, the floating body 120 can block the bypass flow path 160. Accordingly, there will be no refrigerant gas flowing through the bypass flow path 160.

[0113] The floating body 120 may include a bypass groove 123 and a sealing member groove 124.

[0114] The bypass groove 123 can be formed by recessing or recessing along the circumferential surface of the float 120 to form a bypass flow path 160. However, the form of the bypass groove 123 is not limited to this and can have various different forms. The bypass groove 123 can be formed between the grooves 124 of the plurality of sealing members 140a, 140b and 140c. However, the location of the bypass groove 123 is not limited to this.

[0115] The sealing member groove 124 can be formed by recessing or depressing along the circumferential surface of the float 120 to allow the sealing member 140 to be inserted into the sealing member groove 124. However, the form of the bypass groove 123 is not limited to this and can have various different forms. The sealing member groove 124 can be formed above and below the bypass groove 123. However, it is not limited to this; the sealing member groove 124 can be formed only above or below the bypass groove 123.

[0116] Although the floating body 120 is shown as having a cylindrical or columnar shape, it is not limited to this and can have a variety of different shapes.

[0117] The sealing member 140 prevents refrigerant from flowing into the bypass path 160 during operation of the compressor 10. In other words, to prevent refrigerant from leaking into the bypass path 160 while it is flowing in the main path 150, the sealing member 140 can be provided in the valve housings 101, 102, and 103. Since the refrigerant does not leak from the main path 150, the compression power can be increased, and the amount of refrigerant flowing into the compressor housing 11 can be minimized.

[0118] The sealing member 140 can be configured as a plurality of sealing members 140. The sealing members 140 can be arranged to correspond to the positions of the sealing member recess 124. Although the sealing members 140 are shown positioned above and below the bypass inlet 161 and bypass outlet 162, this is not a limitation, and the sealing members 140 can be arranged in various different positions to prevent refrigerant leakage. For example, the sealing members 140 can be formed of Teflon.

[0119] Valve 100 may include a bypass flow path 160 to which refrigerant bypasses or is redirected. The bypass flow path 160 may be formed between valve housings 101, 102, and 103 and the float 120. The bypass flow path 160 may also be formed between valve chamber 110 and the float 120.

[0120] Valve 100 may also include a connecting flow path 180. Specifically, bypass flow path 160 may include connecting flow path 180. Connecting flow path 180 may be arranged between bypass outlet 162 and bypass outlet pipe 101b. Specifically, in bypass flow path 160, connecting flow path 180 may be arranged downstream of bypass outlet 162.

[0121] refer to Figure 6 The function of valve 100 during the operation of compressor 10 will be described.

[0122] When the compressor 10 is operating, refrigerant gas can be discharged from the compression chambers 72 and 74 through the discharge valve 16 into the internal space 14, and then can flow from the compressor 10 to the condenser 20. A valve 100 can be arranged between the compressor 10 and the condenser 20. Therefore, refrigerant can flow through the refrigerant inlet 151 of the valve 100 into the valve chamber 110, and can be discharged from the valve 100 through the refrigerant outlet 152.

[0123] In this configuration, the refrigerant gas flowing through valve chamber 110 to condenser 20 can pressurize the floating body 120 upwards, causing it to move upwards. The floating body 120 can then contact the top of the fourth section 102d. As the floating body 120 moves upwards, it can force open the main flow path 150. Furthermore, when the floating body 120 moves upwards, the bypass inlet 161 and bypass outlet 162 may not be connected to the bypass recess 123. In other words, the bypass flow path 160 can be blocked.

[0124] Figure 7 The illustration shows when Figure 1 The valve that controls when the compressor stops. Figure 8 Is when Figure 1 A cross-sectional view of the valve when the compressor stops.

[0125] refer to Figure 7 and Figure 8 When the compressor 10 stops, the float 120 can move downwards because the condenser 20 side has a higher pressure than the compressor 10 side. Specifically, when the compressor 10 stops, the compression of the refrigerant gas can be prevented, and because the condenser side has a higher pressure than the compressor 10 side, the refrigerant gas can flow back or in the reverse direction. Accordingly, the refrigerant gas can pressurize the float 120 downwards. Specifically, the float 120 can move downwards in the valve chamber 110 and can contact the bottom wall 103a. The float 120 can move downwards and block the refrigerant inlet 151. This is because the drive unit 60 and the compression unit 70 can operate during the operation of the compressor 10, allowing the refrigerant gas to flow to the high-pressure side of the condenser 20, but when the compressor 10 stops, the drive unit 60 and the compression unit 70 stop, so the compressor 10 cannot allow the refrigerant to flow to the condenser 20.

[0126] In other words, when compressor 10 stops, because the condenser 20 side has a relatively higher pressure than the compressor 10 side, and there is no force to send refrigerant from compressor 10 to condenser 20, refrigerant can flow from condenser 20 to compressor 10. That is, refrigerant can flow back or in reverse from the high-pressure condenser 20 side to the low-pressure compressor 10 side. Refrigerant can also flow back or in reverse from refrigerant outlet 152 side to refrigerant inlet 151 side.

[0127] Accordingly, the refrigerant can pressurize the float 120, causing it to move from the condenser 20 side to the compressor 10 side. The pressurized float 120 can move to the refrigerant inlet 151 side and block it. For example, the float 120 can contact the bottom wall 103a of the bottom housing. Finally, when the compressor 10 stops, the float 120 can block the main flow path 150, thereby preventing refrigerant from flowing back or in reverse into the compressor 10. The float 120 can move from the upper portion to the lower portion of the valve chamber 110.

[0128] As described above, when compressor 10 suddenly stops, problems such as refrigerant backflow, oil leakage, and reduced efficiency of the refrigeration cycle equipment may occur. Therefore, the internal space 14 of the compressor and the compression chambers 72 and 74 quickly reach pressure equilibrium, allowing compressor 10 to restart.

[0129] The floating body 120 can block the main flow path 150 and open the bypass flow path 160.

[0130] The bypass flow path 160 may include a bypass inlet 161, a bypass outlet 162, and an intermediate bypass flow path 163.

[0131] When the compressor 10 stops, the float 120 moves downward to block the refrigerant inlet 151, thus blocking the main flow path 150. Furthermore, since the bypass recess 123 connects to the bypass inlet 161 and the bypass outlet 162, the intermediate bypass flow path 163 can connect to the bypass inlet 161 and the bypass outlet 162. In other words, as the refrigerant returns or flows in reverse, the float 120 can move downward to open the bypass inlet 161 and the bypass outlet 162.

[0132] In this configuration, since the refrigerant pressure P2 in the compressor's internal space 14 is higher than the refrigerant pressure P1 in the compression chamber, the discharge valve 16 can be closed. Therefore, to achieve pressure equalization between the compressor's internal space 14 and the compression chambers 72 and 74, the refrigerant gas in the relatively high-pressure internal space 14 can flow through the bypass inlet 161 into the valve chamber 110, and then through the intermediate bypass path 163 to the bypass outlet 162. The refrigerant flowing out from the bypass outlet 162 can then flow through the connecting path 180 from the bypass outlet pipe 101b into the compressor's relatively low-pressure external space.

[0133] The pressure in the compressor's external space can be equal to or approximately equal to the pressure in compression chambers 72 and 74 before the refrigerant gas is compressed. In other words, the compressor's external space can be a space with a lower pressure than that in the internal space 14. For example, the compressor's external space can be the connecting pipe 52. However, it is not limited to this; the compressor's external space can be the second gas-side pipe 25, the accumulator 50, or the suction pipe 54. In other words, it is equally feasible for the bypass outlet 162 to be connected to the second gas-side pipe 25, the accumulator 50, or the suction pipe 54.

[0134] However, the connecting flow path 180 can be omitted. For example, the refrigerant gas can pass through the bypass inlet 161, the intermediate bypass flow path 163 and the bypass outlet 162 in sequence, and can be directly discharged to the outside without the connecting flow path 180.

[0135] The bypass inlet 161 can be connected to the internal space 14 of the housing 11. Specifically, the bypass inlet 161 can be connected to the internal space 14 to bring the high pressure in the internal space 14 into equilibrium. However, the valve 100 need not be arranged in the housing 11, and even when the valve 100 is arranged externally, it can be connected via an additional conduit (not shown) for connecting the internal space 14 and the bypass inlet 161.

[0136] Valve 100 can be arranged in various different locations without being restricted by location, thereby increasing the space utilization of compressor 10 and refrigeration cycle equipment.

[0137] The bypass inlet 161 can be connected to the internal space 14 with relatively high pressure, and the bypass outlet 162 can be connected to the external space of the compressor 10 with relatively low pressure.

[0138] In other words, when the main flow path 160 is blocked due to the movement of the floating body 120, the refrigerant in the internal space 14 can flow into the valve chamber 110 through the bypass inlet 161. The refrigerant in the valve chamber 110 can be connected to the external space through the bypass outlet 162 and the bypass outlet pipe 101b. In other words, the refrigerant can flow through the bypass outlet 162 and the bypass outlet pipe 101b (see...). Figure 3 The refrigerant flows to connecting pipe 52. Accordingly, the refrigerant that has flowed to connecting pipe 52 can flow back to accumulator 50. Of the refrigerant passing through accumulator 50, some refrigerant in a liquid state can remain in accumulator 50, and only gaseous refrigerant can flow back to compressor 10. Accumulator 50 can be arranged adjacent to compressor 10, and accumulator 50 and compressor 10 can be connected via suction pipe 54. Accordingly, refrigerant gas can flow back to compressor 10 via suction pipe 54. Suction pipe 54 can be connected to compression chambers 72 and 74 to allow refrigerant to be drawn into the compression chambers.

[0139] For example, when the main flow path 150 is blocked and the bypass flow path 160 is opened, even if the discharge valve 16 has blocked the discharge flow path 17, the internal space 14 can still be connected to the compression chambers 72 and 74 through the bypass flow path 160, the connecting pipe 52, the accumulator 50 and the suction pipe 54.

[0140] Accordingly, the refrigerant already in the internal space 14 flows into the connecting pipe 52, and can then travel again through the accumulator 50 and flow into the suction pipe 54. The refrigerant gas that has flowed into the suction pipe 54 flows into the compression chambers 72 and 74, so that the internal space 14 and the compression chambers 72 and 74 can reach pressure equilibrium without opening the discharge valve 16. In other words, the pressure P2 in the internal space 14 can be forced down to approach the pressure P1 in the compression chambers 72 and 74.

[0141] During the above process, the pressure difference P2-P1 between the compressor's compression chambers 72 and 74 and the internal space 14 can be less than the pressure difference P2′-P1′ required for operation. That is, (P2′-P1′) > (P2-P1). As a result, the compressor 10 can restart.

[0142] The balancing pressure can be close to the pressure P1 in compression chambers 72 and 74. However, the level of the balancing pressure is not limited to this.

[0143] In this way, the valve 100 according to embodiments of the present disclosure can balance the pressure in the compressor's internal space 14 with the pressure in the compression chambers 72 and 74 and the accumulator 50 without the need for additional check valves and solenoid valves, allowing the compressor to restart as quickly as possible. Consequently, production and material costs for refrigeration cycle equipment can be saved.

[0144] Furthermore, the compressor may suddenly stop due to various reasons such as external electric shock, excessive internal refrigerant intake flow, or pressure pulsations in the cycle. For example, when the pressure difference P2-P1 is greater than the pressure difference P2′-P1′ that allows the compressor to operate in the cycle, the discharge valve 16 will not open the discharge path 17 because the compressor pressure P1 is too low or the internal pressure P2 is too high. Instead, the overload protection device 13 can be operated or activated to stop the drive unit 60.

[0145] As the compressor 10 stops, refrigerant can flow back or in reverse from the condenser 20 into the compressor 10. In this case, the float 120 of the valve 100 can move downward due to the pressure from the refrigerant backflow, thereby blocking the refrigerant inlet 151 and thus preventing refrigerant backflow.

[0146] In this configuration, the floating body 120 can open the bypass flow path 160. The bypass inlet 161 can be directly connected to the internal space 14 of the compressor, or connected to the internal space 14 of the compressor via an additional pipe (not shown). The bypass outlet 162 can be directly connected to the external space of the compressor, or connected to the external space of the compressor via the connecting flow path 180 and the bypass outlet pipe 101b.

[0147] The pressure in the compressor's external space can be equal to or approximately equal to the pressure of the refrigerant gas in the compression chambers 72 and 74 before compression. That is, the compressor's external space can be a space with a lower pressure than the internal space 14. For example, the compressor's external space can be the connecting pipe 52. However, it is not limited to this; the compressor's external space can be the second gas-side pipe 25, the accumulator 50, or the suction pipe 54. In other words, it is equally feasible for the bypass outlet 162 to be connected to the second gas-side pipe 25, the accumulator 50, or the suction pipe 54.

[0148] Accordingly, due to the pressure difference, refrigerant gas can flow from the relatively high-pressure side of the internal space 14 to the relatively low-pressure side of the external space. This allows the pressure P2 in the internal space to reach equilibrium with the pressure P1 in the compression chamber within a short time, and the pressure difference P2-P1 between the internal space and the compression chamber becomes less than the pressure difference P2′-P1′ when the compressor can operate, thereby restarting the compressor 10 and the refrigeration cycle equipment 1.

[0149] Figure 9 This is a cross-sectional view of the valve when the compressor stops, according to an embodiment of the present disclosure.

[0150] Features identical to those in the foregoing embodiments are indicated by the same reference numerals, and overlapping descriptions will not be repeated.

[0151] refer to Figure 9 Valve 100 may also include a resilient member 130. The resilient member 130 can pressurize the float 120 so that the float 120 can quickly block the refrigerant inlet 151 when the compressor 10 stops. In other words, the resilient member 130 can allow the main flow path 150 to be quickly blocked and allow the bypass flow path 160 to be opened.

[0152] The elastic member 130 can be arranged between the refrigerant outlet 152 and the float 120. For example, the elastic member 130 can be arranged in the fourth part 102d of the second housing 102. However, the location of the elastic member 130 is not limited to this, and the elastic member 130 can be arranged in various different locations where the float 120 can quickly block the refrigerant inlet 151 when the compressor 10 stops.

[0153] Figure 10 This is a schematic cross-sectional view of a valve during compressor operation, according to an embodiment of the present disclosure. Figure 11 Is when Figure 10 A schematic cross-sectional view of the valve when the compressor stops.

[0154] Features identical to those in the foregoing embodiments are indicated by the same reference numerals, and overlapping descriptions will not be repeated.

[0155] refer to Figure 10 and Figure 11 The valve 100 may also include a fixing body 170. The fixing body 170 may be fixed in the valve housing 200.

[0156] The fixed body 170 may include a plurality of fixed body inlets 171 and a plurality of fixed body outlets 172. The plurality of fixed body inlets 171 may include a first fixed body inlet 171a and a second fixed body inlet 171b. The fixed body inlets 171 may be refrigerant inlets 151. The plurality of fixed body outlets 172 may include a first fixed body outlet 172a and a second fixed body outlet 172b. Refrigerant that has flowed in through the plurality of fixed body inlets 171 may flow out through the plurality of fixed body outlets 172 to the refrigerant outlets 152.

[0157] The first fixed body inlet 171a and the first fixed body outlet 172a are in Figure 10The portion shown is larger than the second fixture inlet 171b and the second fixture outlet 172b. For example, the width of the second fixture inlet 171b may correspond to... Figure 10 The distance "b" in the middle, and the width of the second fixed body outlet 172b is determined by... Figure 10 The distance "B" in the figure represents the distance. Therefore, the second fixed body inlet 171b and the second fixed body outlet 172b can have different widths, where B is greater than b. For example, the width of the first fixed body inlet 171a and the width of the first fixed body outlet 172a can be the same as each other, and each is greater than the distance B. However, this disclosure is not limited to these example widths. Furthermore, the fixed body inlet 171 and the fixed body outlet 172 can each be formed as a single inlet / outlet, rather than as multiple inlets / outlets.

[0158] The floating body 120 can be configured as multiple floating bodies. For example, the multiple floating bodies 120 may include a first floating body 121 and a second floating body 122.

[0159] The first floating body 121 can be arranged on top (above) the fixed body 170. In other words, the first floating body 121 can be arranged on top (above) the multiple fixed body inlets 171. Accordingly, in this example, the floating body 121 can also be configured as multiple floating bodies 121. The first floating body 121 can be located on top (above) the fixed body inlets 171 to open or block the main flow path 150. Accordingly, during operation of the compressor 10, the first floating body 121 can open the fixed body outlet 172, and when the compressor 10 stops, the first floating body 121 can block the fixed body outlet 172 to prevent refrigerant backflow. For example, the backflowing refrigerant can pressurize the first floating body 121, causing it to move from the condenser 20 side to the compressor 10 side. The first floating body 121, pressurized by the backflowing refrigerant, can move to the fixed body outlet 172 side to block it. For example, the first floating body 121 may contact the upper portion of the fixed body 170 in order to block the outlet 172 of the fixed body.

[0160] The second floating body 122 can be arranged within the space of the fixed body 170. The second floating body 122 can be arranged within the fixed body 170 to open or block the bypass flow path 160. Therefore, the second floating body 122 can open or block the bypass flow path 160. For example, the second floating body 122 can block the bypass outlet 162 during operation of the compressor 10 and can open the bypass outlet 162 when the compressor 10 stops. For example, the second floating body 122 can contact the bottom portion of the fixed body 170 to open the bypass outlet 162. Accordingly, the internal space 14 can quickly reach equilibrium pressure.

[0161] Each of the plurality of floating bodies 120 may include a hollow portion. That is, the first floating body 121 may include a first floating body hollow portion 121a, and the second floating body 122 may include a second floating body hollow portion 122a.

[0162] The hollow portion 121a of the first floating body can be formed smaller than the refrigerant outlet 152, and the hollow portion 122a of the second floating body can be formed smaller than the refrigerant inlet 151. For example... Figure 10 As shown, the refrigerant outlet 152 may have a width corresponding to distance "A". The opening provided in the first floating body 121 or the hollow portion 121a of the first floating body may have a width (e.g., diameter) corresponding to distance "a". For example, distance "A" may be greater than distance "a". Figure 10 As shown, the opening or hollow portion 122a in the second floating body 122 can have a width (e.g., diameter) corresponding to the distance "b". For example, the width of the outlet 172b of the second fixed body is determined by... Figure 10 In the equation, distance "B" represents distance "b", and distance "B" is greater than distance "b".

[0163] In embodiments of this disclosure, the fixed body inlet 171 may be a refrigerant inlet 151. For example, the first fixed body inlet 171a and the second fixed body inlet 171b may be refrigerant inlets 151. In embodiments of this disclosure, the main flow path 150 includes a fixed body inlet 171, a fixed body outlet 172, a first branch flow path 154a, a second branch flow path 154b, and a confluence flow path 155, and may include a refrigerant outlet 152. (See reference...) Figure 10 The refrigerant flowing into the stationary inlet 171 can travel through the first branch flow path 154a or the second branch flow path 154b, and merge in the converging flow path 155. The refrigerant traveling through the converging flow path 155 can flow to the outside of the valve chamber 110 through the refrigerant outlet 152.

[0164] In embodiments of this disclosure, the bypass flow path 160 may include a second fixed body inlet 171b, a second branch flow path 154b, and a bypass outlet 162. The second fixed body inlet 171b may be the bypass inlet 161. (See reference...) Figure 11 The refrigerant flowing into the second stationary inlet 171b can flow to the outside of the valve chamber 110 through the second branch flow path 154b and the bypass outlet 162.

[0165] Figure 12 This is a schematic cross-sectional view of a valve during compressor operation, according to an embodiment of the present disclosure. Figure 13 Is when Figure 12 A schematic cross-sectional view of the valve when the compressor stops.

[0166] Features identical to those in the foregoing embodiments are indicated by the same reference numerals, and overlapping descriptions will not be repeated.

[0167] refer to Figures 12 to 13 The floating body 120 may include multiple body portions 120a and 120b. These multiple body portions 120a and 120b may include a first body portion 120a and a second body portion 120b. The multiple body portions 120a and 120b may be integrally formed. However, they are not limited to this and may also be formed separately.

[0168] The first body portion 120a can be arranged on one side of the valve chamber 110, and the second body portion 120b can be arranged on the other side of the valve chamber 110. For example, if the valve chamber 110 is cylindrical, the first body portion 120a can be provided on one radial side of the valve chamber 110, and the second body portion 120b can be provided on the other radial side of the valve chamber 110. A bypass flow path 160 can be formed between the first body portion 120a and the wall of the valve chamber 110. In other words, the bypass flow path 160 can be formed between the first body portion 120a and the valve housing 200. However, it is not limited to this; the bypass flow path 160 can also be formed between the second body portion 120b and the valve housing 200. The first body portion 120a can open or block the refrigerant inlet 151. Therefore, the flow of refrigerant in the valve chamber 110 can be controlled by opening the refrigerant inlet 151 when the compressor 10 is running and blocking the refrigerant inlet 151 when the compressor 10 is stopped. For example, the recirculated refrigerant can pressurize the first body portion 120a, causing it to move from the condenser 20 side to the compressor 10 side. The first body portion 120a, pressurized by the recirculated refrigerant, can move to the refrigerant inlet 151 side to block the refrigerant inlet 151.

[0169] As the first body portion 120a moves downward within the valve chamber 110, it opens the bypass flow path 160. The first body portion 120a opens the bypass inlet 161 and the bypass outlet 162, allowing refrigerant in the compressor housing 11 to flow out of the housing 11 through the intermediate bypass flow path 163. In this case, the bypass inlet 161 can be connected to the interior of the housing 11, and the bypass outlet 162 can be connected to the exterior of the housing 11. Although a direct connection is possible, it can also be achieved through additional connecting pipes or the like.

[0170] Valve 100 may further include a sealing member 140. The sealing member 140 may include a plurality of sealing portions 140a, 140b, and 140c. These multiple sealing portions 140a, 140b, and 140c may include a first sealing portion 140a, a second sealing portion 140b, and a third sealing portion 140c. Of these multiple sealing portions 140a, 140b, and 140c, the first sealing portion 140a may be disposed in the uppermost portion of the valve chamber 110. The second sealing portion 140b may be connected to the first sealing portion 140a and may extend vertically (e.g., in the axial direction of the valve chamber 110). The third sealing portion 140c may be connected to the second sealing portion 140b. Of these multiple sealing portions 140a, 140b, and 140c, the third sealing portion 140c may be disposed in the lowermost portion of the valve chamber 110. The sealing member 140 may be disposed between the valve housing 200 and the first body portion 120a. The sealing member 140 can be arranged in the area where the bypass flow path 160 is formed. In this way, the sealing member 140 can prevent refrigerant from leaking out of the bypass flow path 160 when the compressor 10 stops. For example, the sealing member 140 can prevent refrigerant from leaking from the intermediate bypass flow path 163 into the main flow path 150 when the compressor 10 stops.

[0171] The bypass inlet 161 can be located in the lower portion, and the bypass outlet 162 can be located in the upper portion. However, the locations of the bypass inlet 161 and the bypass outlet 162 are not limited to these.

[0172] refer to Figure 12 The refrigerant introduced into the valve chamber 110 through the refrigerant inlet 151 can travel through the internal flow path 156 formed inside the valve chamber 110 and flow to the outside of the valve chamber 110 through the refrigerant outlet 152.

[0173] refer to Figure 13 The refrigerant introduced into the valve chamber 110 through the bypass inlet 161 can travel through the intermediate bypass flow path 163 and flow out of the valve chamber 110 through the bypass outlet 162.

[0174] Figure 14 This is a schematic cross-sectional view of a valve during compressor operation, according to an embodiment of the present disclosure. Figure 15 Is when Figure 14 A schematic cross-sectional view of the valve when the compressor stops.

[0175] Features identical to those in the foregoing embodiments are indicated by the same reference numerals, and overlapping descriptions will not be repeated.

[0176] refer to Figure 14 and Figure 15The valve 100 may also include an upper protective wall 201, a lower protective wall 202, and a guide wall 203. For example, the valve housing 200 may also include an upper protective wall 201, a lower protective wall 202, and a guide wall 203.

[0177] An upper protective wall 201 may be formed on top of (above) the first floating body 121 to prevent the first floating body 121 from falling out of the valve housing 200. The upper protective wall 201 may have a refrigerant outlet 152. For example, when the compressor 10 stops, the returning refrigerant may pressurize the first floating body 121, causing it to move from the condenser 20 side to the compressor 10 side. The first floating body 121, pressurized by the returning refrigerant, may move downwards (towards the refrigerant inlet 151) within the valve chamber 110 to block the main flow path 150. For example, the first floating body 121 may move downwards until it contacts the upper portion of the fixed body 170 to block the main flow path 150.

[0178] The lower protective wall 202 may be formed below the second floating body 122 to prevent the second floating body 122 from falling out of the valve housing 200. The lower protective wall 202 may have a refrigerant inlet 151.

[0179] The guide wall 203 can be formed to slope upwards to guide the flow of the second floating body 122 and the refrigerant. A bypass inlet 161 and a bypass outlet 162 can be formed in the guide wall 203.

[0180] The second floating body 122 can be formed in a shape corresponding to the guide wall 203. That is, the second floating body 122 can be formed to be inclined upward. The second floating body 122 can open or block the bypass flow path 160. The second floating body 122 can open or block both the bypass inlet 161 and the bypass outlet 162. For example, as the second floating body 122 moves downward in the valve chamber 110, it can open the bypass flow path 160. The second floating body 122 can open the bypass inlet 161 and the bypass outlet 162, so that the refrigerant in the compressor housing 11 can flow out of the housing 11 through the intermediate bypass flow path 163. In this case, the bypass inlet 161 can be connected to the inside of the housing 11, and the bypass outlet 162 can be connected to the outside of the housing 11. Although a direct connection is possible, a connection can also be made through an additional connecting pipe, etc.

[0181] refer to Figure 14 The refrigerant introduced through the refrigerant inlet 151 can travel through the first main channel 153, the second main channel 154 and the refrigerant outlet 152 to flow to the outside of the valve chamber 110.

[0182] refer to Figure 15The refrigerant introduced into the valve chamber 110 through the bypass inlet 161 can travel through the intermediate bypass flow path 163 and flow out of the valve chamber 110 through the bypass outlet 162.

[0183] Figure 16 This is a cross-sectional view of a compressor according to an embodiment of the present disclosure. Figure 17 Is Figure 16 A schematic cross-sectional view of the valve during the operation of the compressor. Figure 18 Is when Figure 16 A schematic cross-sectional view of the valve when the compressor stops.

[0184] Features identical to those in the foregoing embodiments are indicated by the same reference numerals, and overlapping descriptions will not be repeated.

[0185] refer to Figures 16 to 18 The discharge pipe 12 can be configured as multiple discharge pipes. These multiple discharge pipes may include a first discharge pipe 12a and a second discharge pipe 12b.

[0186] The high-pressure refrigerant present in the internal space 14 of the compressor can flow to the condenser through the first discharge pipe 12a and the second discharge pipe 12b.

[0187] Valve 100 can be formed in the plate. For example, valve chamber 110 of valve 100 can be formed without an additional housing. Accordingly, material costs and production costs can be saved.

[0188] The compressor 10 may include compression chambers 72 and 74 for compressing refrigerant and a refrigerant suction pipe 54 for drawing refrigerant into the compression chambers 72 and 74.

[0189] Valve 100 can be arranged between internal space 14 and refrigerant suction pipe 54, so that bypass flow path 160 discharges refrigerant from internal space 14 to refrigerant suction pipe 54.

[0190] like Figure 17 As shown, the float 120 of the compressor 10 can open the main flow path 150 during operation of the compressor 10. That is, the float 120 can open the refrigerant inlet 151 and the refrigerant outlet 152. In other words, during operation of the compressor 10, refrigerant can flow into the valve through the refrigerant inlet 151 connected to the internal space 14 of the compressor 10. The refrigerant flowing in through the refrigerant inlet 151 can flow into the second discharge pipe 12b through the valve chamber 110 and the refrigerant outlet 152. In this case, the bypass inlet 161 and the bypass outlet 162 can be blocked by the float 120.

[0191] like Figure 18As shown, the floating body 120 can block the main flow path 150 when the compressor 10 stops. The floating body 120 can block the refrigerant inlet 151 and the refrigerant outlet 152. In this case, the floating body 120 can open the bypass flow path 160. For example, the floating body 120 can open the bypass inlet 161 and the bypass outlet 162. In other words, when the compressor 10 stops, the refrigerant flowing in through the bypass inlet 161 connected to the internal space 14 can travel through the valve chamber 110 and flow through the bypass outlet 162 and the connecting flow path 180 to the space connected to the suction port 92. Accordingly, the internal space 14 and the compression chambers 72 and 74 can be connected to the... Figure 8 The same method is used to balance the pressure.

[0192] Several exemplary embodiments of this disclosure have been described above; however, those skilled in the art will understand and recognize that various modifications can be made without departing from the scope of this disclosure. Therefore, it will be apparent to those skilled in the art or of ordinary skill that the scope of protection is defined by the appended claims.

Claims

1. A compressor, comprising: shell; A drive unit is disposed within the housing; A compression unit connected to the drive unit, the compression unit being configured to compress a refrigerant; and A valve configured to control the flow of the refrigerant within the housing, wherein the valve includes: A valve chamber, the valve chamber including a main flow path in which the refrigerant will flow, the main flow path including a refrigerant inlet and a refrigerant outlet; A floating body, disposed in the valve chamber for opening or closing the main flow path, and the floating body including a flow path connecting the refrigerant inlet and the refrigerant outlet; and A bypass flow path is formed between the valve chamber and the floating body to be opened or closed by the floating body, and the bypass flow path allows the refrigerant to be bypassed to the bypass flow path when the drive unit stops and the floating body is configured to be moved by refrigerant traveling through the flow path to close the main flow path and open the bypass flow path.

2. The compressor according to claim 1, wherein, The floating body is configured to open the main flow path when the drive unit is in operation, and The floating body is configured to close the main flow path and open the bypass flow path when the drive unit stops.

3. The compressor according to claim 2, wherein, The bypass flow path includes a bypass inlet and a bypass outlet. The floating body is configured to close at least one of the bypass inlet and the bypass outlet when the drive unit is operating, and The floating body is configured to close at least one of the refrigerant inlet and the refrigerant outlet when the drive unit stops.

4. The compressor according to claim 2, wherein, The valve also includes an elastic member configured to elastically pressurize the floating body, such that the floating body closes the refrigerant inlet when the drive unit stops.

5. The compressor according to claim 4, further comprising: A sealing member is disposed between the valve chamber and the floating body to prevent the refrigerant from leaking into the bypass flow path during operation of the drive unit.

6. The compressor according to claim 5, wherein, The refrigerant inlet is located in the lower portion of the valve chamber, and the refrigerant outlet is located in the upper portion of the valve chamber. The elastic member is disposed between the upper portion of the valve chamber and the floating body, and The bypass flow path is arranged along the circumferential surface of the floating body.

7. The compressor according to claim 1, wherein, The floating bodies include multiple floating bodies, and The plurality of floating bodies includes a first floating body disposed in the upper part of the valve chamber and a second floating body disposed below the first floating body.

8. The compressor according to claim 7, wherein, The valve also includes a fixing body disposed in the valve chamber to allow the refrigerant to flow along the main flow path or the bypass flow path. The first floating body is positioned above the fixed body to open or close the main flow path, and The second floating body is disposed in the internal space of the fixed body to open or close the bypass flow path.

9. The compressor according to claim 8, wherein, Each of the plurality of floating bodies includes a hollow portion. The first floating body includes a first floating body hollow portion formed smaller than the refrigerant outlet, and The second floating body includes a hollow portion of the second floating body that is formed into an entrance smaller than that of the fixed body.

10. The compressor according to claim 4, wherein, The floating body includes a first floating body disposed on a first side of the valve chamber and a second floating body disposed on a second side of the valve chamber. The bypass flow path is formed between at least one of the first and second floating bodies and the valve chamber, and The compressor also includes a sealing member disposed in the region where the bypass flow path is formed to prevent the refrigerant from leaking from the bypass flow path when the drive unit stops.

11. The compressor according to claim 1, further comprising: A compression chamber configured to compress the refrigerant; and A refrigerant suction pipe configured to draw the refrigerant into the compression chamber. The valve is located between the internal space of the housing and the refrigerant suction pipe, so that the bypass flow path discharges the refrigerant from the internal space of the housing into the refrigerant suction pipe.

12. The compressor according to claim 5, wherein, The sealing component contains Teflon.

13. A refrigeration cycle device, comprising: Condenser; An expander connected to the condenser; Evaporator, the evaporator being connected to the expander; A compressor connected to the evaporator, the compressor being configured to compress refrigerant; and A valve, at least one disposed outside or inside the compressor, the valve being configured to control the flow of the refrigerant in the compressor, wherein the valve includes: Valve chamber, the valve chamber including a refrigerant inlet and a refrigerant outlet; A floating body disposed in the valve chamber, the floating body being configured to control the flow of refrigerant into and out of the valve chamber, and the floating body including a flow path connecting the refrigerant inlet and the refrigerant outlet; and A bypass flow path is formed between the valve chamber and the floating body to be opened or closed based on the movement of the floating body, and the bypass flow path allows the refrigerant to be bypassed to the bypass flow path when the compressor stops and the floating body is configured to be moved by refrigerant traveling through the flow path to open the bypass flow path.

14. The refrigeration cycle device according to claim 13, wherein, The floating body is configured to close the bypass flow path when the compressor is running, and the floating body is configured to open the bypass flow path when the compressor stops.

15. The refrigeration cycle device according to claim 14, wherein, The valve also includes: A main flow path, formed in the valve chamber, allows the refrigerant to flow from the refrigerant inlet to the refrigerant outlet; and An elastic member configured to elastically pressurize the floating body, the elastic member being disposed between the valve chamber and the floating body such that the floating body closes the main flow path when the compressor stops.

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