Compressor and refrigeration cycle apparatus comprising same

Abstract

Disclosed are a compressor and a refrigeration cycle apparatus comprising same. According to the compressor and the refrigeration cycle device comprising the compressor, the refrigeration cycle device comprises a compressor, a condenser, an expander, and an evaporator, and the compressor comprises a casing, a compression portion, a refrigerant suction pipe, a foreign substance separator, and a pressure sensing portion, wherein the pressure sensing portion can be provided on the rear end side of a foreign substance filter on the basis of a suction direction of the refrigerant. As such, even when the foreign substance filter is blocked by the foreign substance, the pressure of the refrigerant sucked into a compression chamber can be precisely measured.

Description

Compressor and refrigeration cycle device equipped therewith

[0001] The present invention relates to a compressor and a refrigeration cycle device having the same.

[0002] In general, a refrigeration cycle device is a device that is mainly applied to refrigerators and air conditioners to generate cold air and / or warm air. Such a refrigeration cycle device is configured so that a compressor, condenser, expander, and evaporator form a closed loop.

[0003] When a refrigeration cycle device is applied to an air conditioner, the heat exchange between the condenser and evaporator is utilized to heat or cool the indoor space. For example, when the condenser is used as the indoor unit, it provides heating, and when the evaporator is used as the indoor unit, it provides cooling. Recently, air conditioners that combine heating and cooling have become widely known. These air conditioners feature a refrigerant switching valve installed on the discharge side of the compressor to switch the direction of refrigerant flow, allowing the indoor unit to switch between the condenser and evaporator functions.

[0004] In the above refrigeration cycle device, if foreign substances are mixed with the refrigerant sucked into the compression chamber, the compressor bearing surface may wear and / or be damaged, which may reduce the reliability of the compressor. Furthermore, if the suction path is partially or completely blocked by foreign substances, the compressor may enter low-pressure operation (e.g., vacuum operation), which may result in serious compressor damage. This may also interfere with the oil supply, resulting in friction loss and / or wear on the bearing surface, which may significantly reduce reliability.

[0005] Accordingly, technologies are being introduced to prevent foreign substances from entering the suction side of the compressor in conventional refrigeration cycle devices, as well as to prevent the suction side of the compressor from being blocked by foreign substances.

[0006] Patent Document 1 (Korean Utility Model Registration No. 20-0218145) discloses an accumulator liquid blocking device for a compressor, installed to block liquid refrigerant from flowing into the accumulator. However, this device has the drawback of not being able to block foreign substances other than liquid refrigerant from flowing into the accumulator.

[0007] Patent Document 2 (Korean Patent Publication No. 10-0783416) discloses a foreign matter blocker installed between an evaporator and a compressor. However, foreign matter filtered in the foreign matter filter can accumulate or condense, clogging the foreign matter filter. This can prevent refrigerant and oil from flowing into the compressor, forcing the compressor into vacuum operation. This can cause serious damage to the compressor, significantly reducing the reliability of the refrigeration cycle system, including the compressor. Furthermore, the motor within the compressor can overheat and demagnetize, potentially reducing the overall efficiency of the refrigeration cycle system.

[0008] Considering this, a technology has been known in the past to detect the suction pressure of the refrigerant sucked into the compressor by installing a pressure sensor in the middle of the refrigeration cycle device, that is, in the middle of the refrigerant circulation path, and to stop the compressor and / or the refrigeration cycle device when the detected pressure falls below the reference pressure.

[0009] However, in the conventional compressor and refrigeration cycle device described above, the pressure sensor that detects the suction pressure of the refrigerant is placed on the front side of the accumulator, that is, between the evaporator and the accumulator, so its effectiveness is limited. As a result, if a foreign substance filter such as a mesh is provided on the rear side of the accumulator, and the foreign substance filter is clogged or excessive liquid refrigerant is sucked in, it cannot be detected quickly and accurately, which may cause abnormal operation such as the vacuum operation described above.

[0010] The purpose of the present invention is to provide a compressor and a refrigeration cycle device having the same that can prevent foreign substances from entering the compressor while allowing refrigerant to be smoothly sucked in.

[0011] Another object of the present invention is to provide a compressor capable of quickly and accurately detecting a change in the amount of refrigerant sucked into the compressor, and a refrigeration cycle device having the same.

[0012] Another object of the present invention is to provide a compressor and a refrigeration cycle device equipped with the same, which can prevent abnormal operation such as vacuum operation in advance by appropriately responding to changes in the amount of refrigerant suctioned.

[0013] Another object of the present invention is to provide a compressor and a refrigeration cycle device having the same that can quickly relieve freezing in the refrigerant suction path or secure the refrigerant suction amount by bypassing the refrigerant.

[0014] In order to achieve the present invention, a compressor including a casing, a compression unit, a refrigerant suction pipe, a foreign matter separator, and a pressure sensing unit may be provided. The compression unit may be provided inside the casing and have a compression chamber to compress a refrigerant. The refrigerant suction pipe may penetrate the casing and be directly connected to the compression chamber. The foreign matter separator may be connected to the refrigerant suction pipe and may have a foreign matter filter unit to separate foreign matters from the refrigerant sucked into the compression chamber. A pressure sensing unit may be provided to detect the pressure of the refrigerant sucked into the compression chamber, and the pressure sensing unit may be provided at a rear end of the foreign matter filter unit based on the suction direction of the refrigerant. Through this, even if the foreign matter filter unit is blocked by foreign matters, the pressure of the refrigerant sucked into the compression chamber can be accurately measured.

[0015] For example, the pressure sensing unit may include a sensor pipe and a sensor member provided in the sensor pipe to detect the pressure of the refrigerant transmitted through the sensor pipe. The sensor pipe may be coupled to be in communication with the refrigerant suction pipe or the foreign matter separator. Through this, the pressure of the refrigerant sucked into the compression chamber through the refrigerant pipe can be calculated using the pressure of the refrigerant bypassed from the refrigerant suction pipe or the foreign matter separator to the sensor pipe.

[0016] In order to achieve the object of the present invention, a refrigeration cycle device including a compressor, a condenser, an expander, and an evaporator can be provided. A foreign matter filter unit for filtering foreign matters from refrigerant moving from the evaporator to the compressor can be provided in a suction path between the evaporator and the compressor. A pressure sensing unit can be provided in the suction path to detect the pressure of the refrigerant sucked into the compressor. The pressure sensing unit can be coupled to the suction path at a rear end of the foreign matter filter unit based on the suction direction of the refrigerant so as to be in communication with the suction path. Through this, even if the foreign matter filter unit is blocked by foreign matters, the pressure of the refrigerant sucked into the compression chamber can be accurately measured.

[0017] For example, a refrigerant suction pipe may be connected to the compressor. The pressure sensing unit may be connected to the refrigerant suction pipe. Through this, the pressure of the refrigerant suctioned into the compression chamber can be calculated using the pressure of the refrigerant passing through the refrigerant suction pipe.

[0018] As another example, one end of a refrigerant suction pipe may be connected to the compressor, and the other end of the refrigerant suction pipe may be connected to a foreign matter separator equipped with the foreign matter filter unit. The pressure sensing unit may be connected to the foreign matter separator at the rear end of the foreign matter filter unit. This not only facilitates assembly of the pressure sensing unit, but also effectively suppresses thermal deformation of components within the casing that may occur during welding of the pressure sensing unit.

[0019] As another example, one end of a refrigerant suction pipe may be connected to the compressor, and an accumulator equipped with the foreign matter filter may be connected to the other end of the refrigerant suction pipe. The pressure sensing unit may be connected to the accumulator at the rear end of the foreign matter filter. This makes it easier to assemble the pressure sensing unit since the pressure sensing unit is located further away from the compressor casing, and also more effectively suppresses thermal deformation of components within the casing that may occur during welding of the pressure sensing unit.

[0020] As another example, one end of a refrigerant suction pipe may be connected to the compressor, a foreign matter separator having a first foreign matter filter unit may be connected to the other end of the refrigerant suction pipe, and an accumulator having a second foreign matter filter unit may be connected between the foreign matter separator and the evaporator. The pressure sensing unit may be connected to at least one of the refrigerant suction pipe, the foreign matter separator at the rear end of the first foreign matter filter unit, and the accumulator at the rear end of the second foreign matter filter unit. Through this, even if the foreign matter filter unit is clogged, the pressure of the refrigerant sucked into the compression chamber can be accurately measured.

[0021] As another example, the pressure sensing unit may include a sensor flow path connected so that one end is connected to the suction flow path at a position behind the foreign matter filter unit; and a sensor member provided at the other end of the sensor flow path to detect the pressure of the refrigerant transmitted through the sensor flow path. Through this, the pressure of the refrigerant passing through the suction flow path can be detected, and the pressure of the refrigerant sucked into the compression chamber can be calculated.

[0022] For example, the sensor pipe may include a first pipe portion having one end connected to the suction pipe; and a second pipe portion extending from the other end of the first pipe portion toward the sensor member. The first pipe portion and the second pipe portion may be formed by bending to intersect each other. This allows for shortening the length of the moment arm for the sensor pipe while improving assembly efficiency.

[0023] Specifically, the first pipe section may be formed to extend in the radial direction of the compressor, and the second pipe section may be formed to extend in the axial direction of the compressor. The length of the first pipe section may be formed to be shorter than or equal to the length of the second pipe section. Through this,

[0024] In addition, the first pipe section may be formed to extend in the radial direction of the compressor, and the second pipe section may be formed to extend in the axial direction of the compressor. The diameter of the first pipe section may be formed to be greater than or equal to the diameter of the second pipe section. Through this, the length of the moment arm of the sensor flow path may be shortened, thereby reducing vibration caused by the sensor flow path section and / or the sensor member.

[0025] For example, the system may further include a control unit electrically connected to the pressure sensing unit and controlling the operation of the compressor based on pressure data transmitted from the pressure sensing unit. Accordingly, when the pressure of the refrigerant sucked into the compression chamber is lower than the reference pressure, the compressor can be quickly switched to protective operation or stopped, thereby preventing damage and / or efficiency degradation of the compressor and the refrigeration cycle device equipped therewith.

[0026] Specifically, the control unit may include a first judgment unit that compares the detected pressure transmitted from the pressure sensing unit with a preset reference pressure, and if the detected pressure is lower than the reference pressure, determines that there is an error state and limits the power supply to the compressor. Through this, it is possible to quickly suppress the compressor from entering vacuum operation, thereby suppressing damage and / or efficiency reduction of the compressor and the refrigeration cycle equipped therewith.

[0027] More specifically, the control unit can accumulate the number of times the compressor's power supply is restricted and, when the accumulated number reaches a preset number, can stop the operation of the refrigeration cycle device or initiate protective operation. Through this, it is possible to quickly suppress the compressor from entering vacuum operation without frequently stopping the operation of the compressor, thereby suppressing damage and / or efficiency reduction of the compressor and the refrigeration cycle equipped therewith.

[0028] More specifically, a display unit may be further provided, electrically connected to the control unit, to externally display the operating status of the refrigeration cycle device. This allows for the external notification of an abnormality in the compressor and the refrigeration cycle device including the compressor to promptly take follow-up measures.

[0029] As another example, the foreign matter filter unit may be electrically connected to a power supply unit. The power supply unit may supply power to the foreign matter filter unit so that the foreign matter filter unit generates heat when the detected pressure of the refrigerant by the pressure sensing unit is lower than a preset reference pressure. This allows the condensed foreign matter in the foreign matter filter unit to be thawed, allowing the refrigerant to be supplied normally to the compression chamber, thereby preventing the compressor from operating under vacuum.

[0030] As another example, the front and rear ends of the foreign matter filter unit may be connected by a bypass passage. The bypass passage may be formed as a groove or hole on the inner surface of the member on which the foreign matter filter unit is provided. This not only suppresses vacuum operation even if the foreign matter filter unit is clogged by the bypass passage, but also simplifies the piping around the refrigerant suction pipe.

[0031] As another example, the front and rear ends of the foreign matter filter unit may be connected by a bypass passage. The bypass passage unit may be formed as a bypass pipe connected to a member on which the foreign matter filter unit is installed. This not only suppresses vacuum operation even if the foreign matter filter unit is clogged, but also increases the cross-sectional area of ​​the bypass passage, thereby increasing the amount of refrigerant bypassed.

[0032] The compressor of the present invention and the refrigeration cycle device having the same include a compressor, a condenser, an expander, and an evaporator, and the compressor includes a casing, a compression unit, a refrigerant suction pipe, a foreign matter separator, and a pressure sensing unit, wherein the pressure sensing unit may be provided at the rear end of the foreign matter filter unit based on the suction direction of the refrigerant. Through this, even if the foreign matter filter unit is blocked by foreign matter, the pressure of the refrigerant sucked into the compression chamber can be accurately measured.

[0033] The compressor of the present invention and the refrigeration cycle device having the same include a sensor flow pipe and a sensor member, wherein the sensor flow pipe can be connected to a refrigerant suction pipe or a foreign matter separator. Through this, the pressure of the refrigerant sucked into the compression chamber through the refrigerant flow pipe can be calculated using the pressure of the refrigerant bypassed from the refrigerant suction pipe or the foreign matter separator to the sensor flow pipe.

[0034] The compressor of the present invention and the refrigeration cycle device equipped therewith can have a pressure sensing unit connected to a foreign matter separator and / or an accumulator at the rear end of a foreign matter filter unit. This not only facilitates assembly of the pressure sensing unit, but also effectively suppresses thermal deformation of components within the casing that may occur during welding of the pressure sensing unit.

[0035] The compressor of the present invention and the refrigeration cycle device equipped with the same may further include a control unit that is electrically connected to a pressure sensing unit and controls the operation of the compressor according to pressure data transmitted from the pressure sensing unit. Through this, when the pressure of the refrigerant sucked into the compression chamber is lower than the reference pressure, the compressor can be quickly switched to protective operation or stopped, thereby preventing damage and / or efficiency reduction of the compressor and the refrigeration cycle device equipped with the same.

[0036] The compressor of the present invention and the refrigeration cycle device equipped therewith may have a foreign matter filter section electrically connected to a power supply section. This allows foreign matter condensed in the foreign matter filter section to be thawed, thereby ensuring that refrigerant is supplied normally to the compression chamber, thereby preventing vacuum operation of the compressor in advance.

[0037] The compressor of the present invention and the refrigeration cycle device equipped therewith may be connected to a bypass passage between the front and rear ends of the foreign matter filter section. Thus, even if the foreign matter filter section becomes clogged, refrigerant can flow into the compression chamber through the bypass passage, thereby suppressing vacuum operation.

[0038] Fig. 1 is a schematic diagram showing a refrigeration cycle device to which a scroll compressor according to the present embodiment is applied.

[0039] Fig. 2 is a cross-sectional view showing the inside of a scroll compressor including a foreign matter separator in Fig. 1.

[0040] Fig. 3 is a perspective view showing the pressure sensing unit in Fig. 2.

[0041] Figures 4 and 5 are front and side views showing the pressure sensing unit of Figure 3 assembled to the refrigerant suction pipe.

[0042] Figure 6 is a block diagram showing the control unit in Figure 1.

[0043] Fig. 7 is a flowchart showing low pressure prevention control operation in a refrigeration cycle device equipped with a pressure sensing unit according to the present embodiment.

[0044] Fig. 8 is a perspective view showing another embodiment of the installation location of the pressure sensing unit.

[0045] Fig. 9 is a perspective view showing another embodiment of the installation location of the pressure sensing unit.

[0046] Fig. 10 is a cross-sectional view showing another example of an accumulator having a pressure sensing unit.

[0047] Fig. 11 is a cross-sectional view showing another example of a foreign substance separator equipped with a pressure sensing unit.

[0048] Fig. 12 is a cross-sectional view showing another example of a foreign substance separator equipped with a pressure sensing unit.

[0049] Fig. 13 is a cross-sectional view showing another embodiment of a foreign substance separator equipped with a pressure sensing unit.

[0050] Fig. 14 is a schematic diagram showing a refrigeration cycle device in which a pressure sensing unit according to the present embodiment is applied to an accumulator.

[0051] Fig. 15 is a perspective view showing a scroll compressor including an accumulator in Fig. 14.

[0052] Hereinafter, a compressor and refrigeration cycle device according to the present invention will be described in detail based on an embodiment illustrated in the attached drawings. As described above, the refrigeration cycle device includes a compressor, a condenser, an expander, and an evaporator, and this embodiment is described using a refrigeration cycle device for both heating and cooling, which is equipped with a refrigerant switching valve on the discharge side of the compressor, as an example. However, the same may be applied to a refrigeration cycle device for only cooling and / or only heating.

[0053] Typically, compressors can be categorized as low-pressure and high-pressure compressors, depending on the pressure of the refrigerant filled within the internal space of the casing. In a low-pressure compressor, the refrigerant suction pipe is connected to the internal space of the casing, while in a high-pressure compressor, the refrigerant suction pipe is directly connected to the compression unit. This embodiment will describe a high-pressure compressor as a representative example.

[0054] High-pressure compressors can be categorized into reciprocating compressors, rotary compressors, and scroll compressors based on their compression method. The following description will focus on a high-pressure scroll compressor (hereinafter referred to as "scroll compressor") as a representative example. However, the same principles apply to high-pressure reciprocating compressors and rotary compressors.

[0055] Scroll compressors can be classified as hermetic scroll compressors or open scroll compressors, depending on whether the drive motor and compression unit are installed together within the internal space of the casing. This embodiment uses a hermetic scroll compressor as a representative example. However, the same principles can be applied to open scroll compressors.

[0056] The scroll compressor according to the present invention will be described with a focus on a vertical scroll compressor. However, the compressor according to the present invention is not necessarily applicable only to a vertical scroll compressor, but can also be equally applied to a horizontal scroll compressor.

[0057] Fig. 1 is a schematic diagram showing a refrigeration cycle device to which a scroll compressor according to the present embodiment is applied.

[0058] Referring to FIG. 1, the refrigeration cycle device (1) according to the present embodiment may include a compressor (10), a condenser (20), an expander (30), and an evaporator (40). In other words, the condenser (20), the expander (30), and the evaporator (40) are sequentially connected to the discharge side of the compressor (10), and the evaporator (40) is connected to the suction side of the compressor (10). Accordingly, the compressor (10), the condenser (20), the expander (30), and the evaporator (40) may be formed to form a closed loop.

[0059] In addition, the refrigeration cycle device (1) according to the present embodiment may further include an accumulator (50) and a foreign matter separator (170). In other words, an accumulator (50) for separating liquid refrigerant and / or oil from the suction refrigerant is provided between the suction side of the compressor (10), for example, the outlet of the evaporator (40), and the suction side of the compressor (10), and a foreign matter separator (170) may be provided between the outlet of the accumulator (50) and a refrigerant suction pipe (115) to be described later. Accordingly, the inlet of the accumulator (50) may be connected to a refrigerant circulation pipe (70) connected to the outlet of the evaporator (40), the outlet of the accumulator (50) may be connected to an inlet of a foreign matter separator (170), and the outlet of the foreign matter separator (170) may be connected to a refrigerant suction pipe (115).

[0060] In this case, since both the accumulator (50) and the foreign matter separator (170) are positioned outside the casing (110) of the compressor (10) to be described later, they may be understood as a part of the refrigeration cycle device (1), and since both the accumulator (50) and the foreign matter separator (170) form a part of the suction path (SP) connected to the suction side of the compressor (10), they may be understood as a part of the compressor (10). However, the accumulator is positioned relatively far from the compressor (10), whereas the foreign matter separator (170) may be directly connected to the refrigerant suction pipe (115). Accordingly, for convenience, the accumulator (50) is described below as being defined as a part of the refrigeration cycle device (1), whereas the foreign matter separator (170) is described as being defined as a part of the compressor (10).

[0061] In addition, the refrigeration cycle device (1) according to the present embodiment may further include a pressure sensing unit (180) and a control unit (190). The pressure sensing unit (180) detects the pressure of the refrigerant sucked into the compressor (10), and the control unit (190) is electrically connected to the pressure sensing unit (180) to control the operation of the compressor (10) and / or the refrigeration cycle device (1) according to the pressure of the sucked refrigerant detected by the pressure sensing unit (180). Accordingly, the pressure sensing unit (180) and the control unit (190) may be understood as a part of the compressor (10) or a part of the refrigeration cycle device (1) depending on the installation position of the pressure sensing unit (180). For example, when the pressure sensing unit (180) is provided at the rear end of the foreign substance separator (170) and / or the foreign substance separator (170), the pressure sensing unit (180) and the control unit (190) can be described as a part of the compressor (10), and when the pressure sensing unit (180) is provided at the accumulator (50) and / or between the accumulator (50) and the foreign substance separator (170), the pressure sensing unit (180) and the control unit (190) can be described as a part of the refrigeration cycle device (1). Hereinafter, the pressure sensing unit (180) and the control unit (190) are described as being defined as forming a part of the compressor (10) together with the foreign substance separator (170). However, in the case where a foreign substance filter unit (51) is provided in the accumulator (50) and a pressure sensing unit (180) is provided in the accumulator (50), this will be described as another embodiment for the refrigeration cycle device (1).

[0062] In the refrigeration cycle device (1) as described above, the refrigerant compressed in the compressor (10) is discharged to the internal space provided in the casing (110) of the compressor (10) to be described later, and the refrigerant is discharged toward the condenser (20) through the refrigerant discharge pipe (116) to be described later, and then passes through the expander (30) and the evaporator (40) in sequence before being sucked back into the compressor (10) through the refrigerant suction pipe (115) to be described later.

[0063] At this time, since an accumulator (50) and a foreign substance separator (170) are respectively provided in the suction path (SP) between the evaporator (40) and the compressor (10), foreign substances including liquid refrigerant and oil mixed in the refrigerant are separated. Accordingly, foreign substances including liquid refrigerant and oil are prevented from being sucked into the compressor (more precisely, the compression chamber) (10), thereby improving the reliability and / or efficiency of the compressor (10) and / or the refrigeration cycle device (1).

[0064] In this case, a foreign substance filter unit (51) (171) for filtering out foreign substances mixed in the refrigerant may be provided inside the accumulator (50) and / or inside the foreign substance separator (170), respectively. For example, a mesh foreign substance filter unit (hereinafter, a second foreign substance filter unit) (51) may be provided at the inlet side of the accumulator (50), and another mesh foreign substance filter unit (hereinafter, a first foreign substance filter unit) (171) may be provided at the inlet side of the foreign substance separator (170). Accordingly, liquid refrigerant and / or assembly byproducts mixed in the refrigerant sucked into the compressor (10) from the evaporator (40) may be filtered out by the second foreign substance filter unit (51) of the accumulator (50) and / or the first foreign substance filter unit (171) of the foreign substance separator (170).

[0065] In this case, a pressure sensor (or low pressure switch) forming a pressure sensing unit (180) is provided at the rear end of the second foreign substance filter unit (51) and / or the rear end of the first foreign substance filter unit (171), and after detecting the suction pressure of the refrigerant sucked into the compressor (10), the control unit (190) electrically connected to the pressure sensing unit (180) determines whether to operate the compressor (10) and / or the refrigeration cycle device (1). For example, if the detected pressure (P2) by the pressure sensor is lower than the preset reference pressure (P1), the second foreign substance filter unit (51) of the accumulator (50) and / or the first foreign substance filter unit (171) of the foreign substance separator (170) are determined to be clogged, and the compressor (10) and / or the refrigeration cycle device (1) are stopped. Through this, it is possible to prevent damage to the compressor (10) and / or the refrigeration cycle device (1) by blocking the compressor (10) from entering vacuum operation in advance.

[0066] Hereinafter, a representative example will be described in which the pressure sensing unit (180) is installed at the rear end of the first foreign substance filter unit (171), that is, at the foreign substance separator (170) and / or the refrigerant suction pipe (115).

[0067] FIG. 2 is a cross-sectional view showing the inside of a scroll compressor including a foreign substance separator in FIG. 1, FIG. 3 is a perspective view showing a pressure sensing unit in FIG. 2, FIG. 4 and FIG. 5 are a front view and a side view showing the pressure sensing unit assembled to a refrigerant suction pipe in FIG. 3, and FIG. 6 is a block diagram showing a control unit in FIG. 1.

[0068] Referring to FIG. 2, a scroll compressor (10) according to the present embodiment may include a compressor casing (hereinafter abbreviated as casing) (110), an electric motor (120), a compression unit (C), a foreign matter separator (170), a pressure sensing unit (180), and a control unit (190). The casing (110) forms the exterior of the compressor (10) and may be connected to a condenser (20) and an evaporator (40), respectively. For example, a compression unit may be provided in the lower space of the casing (110), and the compression unit (C) may be directly connected to the evaporator (40) through a refrigerant suction pipe (115), and an upper space (110b) of the casing (110) may be connected to the condenser through a refrigerant discharge pipe (116). Accordingly, the refrigerant that has passed through the evaporator (40) is sucked into the compression section (C) through the accumulator (50) and the refrigerant suction pipe (115), and the refrigerant discharged from the compression section (C) into the internal space of the casing (110) can be discharged to the condenser (20) through the refrigerant discharge pipe (116).

[0069] The casing (110) may include a cylindrical shell (111), an upper shell (112), and a lower shell (113). The cylindrical shell (111) may have a cylindrical shape with both upper and lower ends open, the upper shell (112) may be coupled to cover the opened upper end of the cylindrical shell (111), and the lower shell (113) may be coupled to cover the opened lower end of the cylindrical shell (111). Accordingly, the internal space (110a) of the casing (110) is sealed, and the sealed internal space (110a) of the casing (110) may be separated into a lower space (110a) and an upper space (110b) based on the electric motor (120).

[0070] The lower space (110a) may be formed at the lower portion of the electric motor (120) to form a storage space where mixed oil containing oil or liquid refrigerant is stored, and the upper space (110b) may be formed at the upper portion of the electric motor (120) to form an oil separation space where oil is separated from refrigerant discharged from the compression unit (C). A refrigerant suction pipe (115) directly connected to the compression unit (C) may be connected to the lower space (110a), and a refrigerant discharge pipe (116) may be connected to the upper space (110b) so as to be in communication therewith. Accordingly, the refrigerant and oil may be separated in the upper space (110b), and the refrigerant may be discharged to the condenser (20) through the refrigerant discharge pipe (116), and the oil may be recovered and stored in the lower space (110a).

[0071] The refrigerant suction pipe (115) can be connected by radially penetrating the side surface of the cylindrical shell (111). In other words, the refrigerant suction pipe (115) is formed in an L shape and can be connected by radially penetrating the cylindrical shell (111) forming the casing (110). One end of the refrigerant suction pipe (115) can be directly connected to the suction port (not shown) of the fixed scroll (140) forming the compression section by penetrating the cylindrical shell (111). Accordingly, the suction refrigerant that has passed through the first foreign matter filter section (171) described later can be directly sucked into the compression chamber (V) through the refrigerant suction pipe (115).

[0072] The electric motor (120) may include a stator (121) and a rotor (122). The stator (121) may be fixedly connected to the internal space of the casing (110), and the rotor (122) may be rotatably provided inside the stator (121). One end of a rotation shaft (125) may be connected to the rotor (122), and the other end of the rotation shaft (125) may be connected to a rotating scroll (150) forming a compression section (C). Accordingly, the electric motor (120) receives electrical energy from the outside and converts it into mechanical energy.

[0073] The compression section (C) may include a main frame (130), a fixed scroll (140), an orbiting scroll (150), and a discharge cover (160). The main frame (130) is fixedly coupled to the internal space of the casing (110), the fixed scroll (140) is coupled to the main frame (130), the orbiting scroll (150) is provided between the main frame (130) and the fixed scroll (140) and coupled to the other end of the rotation shaft (125), and the discharge cover (160) may be coupled to the back surface of the fixed scroll (140). Accordingly, the orbiting scroll (150) eccentrically coupled to the rotating shaft (125) forms a compression chamber (V) between itself and the fixed scroll (140) while performing an orbital movement with respect to the fixed scroll (140), and the refrigerant compressed in the compression chamber (V) is discharged into the muffler space (161) of the discharge cover (160).

[0074] The main frame (130) can be fixedly installed on the opposite side of the fixed scroll (140) with the orbiting scroll (150) in between. Accordingly, an intermediate pressure chamber forming a back pressure chamber is formed between the main frame (130) and the back surface of the orbiting scroll (150), thereby supporting the orbiting scroll (150) toward the fixed scroll (140).

[0075] The fixed scroll (140) can be fixedly connected to the main frame (130) by forming a fixed wrap (142) on one side of the fixed plate portion (141). The fixed wrap (142) extends toward the orbiting scroll (150) and is engaged with the orbiting wrap (152) to be described later to form a compression chamber (V). The fixed wrap (142) can be formed in an involute shape together with the orbiting wrap (152). However, the fixed wrap (142) and the orbiting wrap (152) can be formed in various shapes other than the involute.

[0076] A discharge port (1411) and a bypass hole (1412) communicating with a compression chamber (V) that generates discharge pressure may be formed in the fixed plate portion (141). Accordingly, the refrigerant compressed in the compression chamber (V) may be discharged to the muffler space (161) of the discharge cover (160) through each of the discharge ports (1411) and the bypass hole (1412).

[0077] The orbiting scroll (150) may be supported in both axial directions by the main frame (130) and the fixed scroll (140) by forming an orbiting wrap (152) on one side of the orbiting plate (151). The orbiting wrap (152) may be interlocked with the fixed wrap (144) to form a compression chamber (V). The orbiting wrap (152) may be formed in an involute shape together with the fixed wrap (142). However, as described above, the orbiting wrap (152) may be formed in various shapes other than the involute, just like the fixed wrap (142).

[0078] A rotary shaft coupling portion (153) may be formed in the central portion of the orbiting scroll (150), into which an eccentric portion (1251) of the rotary shaft (125) is rotatably inserted and coupled. The rotary shaft coupling portion (153) may be formed at a height overlapping the rotary wrap (152) on the same plane. Accordingly, the outer peripheral portion of the rotary shaft coupling portion (153) may be connected to the rotary wrap (152) and serve to form a compression chamber (V) together with the fixed wrap (142) during the compression process.

[0079] The discharge cover (160) is provided with a muffler space (161) that accommodates a discharge port (1411) and a bypass hole (1412), and can be sealedly connected to the back surface of the fixed plate part (141). The discharge space can be connected to the lower space (110a) of the casing (110). Accordingly, the refrigerant discharged from the compression chamber (V) to the muffler space (161) is discharged to the lower space (110a) of the casing (110) and moves to the upper space (110b) via the electric motor (120).

[0080] Referring to Fig. 2, the foreign matter separator (170) according to the present embodiment may include a first foreign matter filter unit (171). The foreign matter separator (170) is provided in the middle of the refrigerant circulation pipe (70) outside the casing (110), for example, between the accumulator (50) and the refrigerant suction pipe (115), and the first foreign matter filter unit (171) is provided inside the foreign matter separator (170) and serves to filter foreign matters from the refrigerant passing through the foreign matter separator (170).

[0081] Specifically, the foreign matter separator (170) may be formed in a cylindrical shape and may be arranged axially, for example, parallel to the casing (110). The upper end of the foreign matter separator (170) may be connected to a refrigerant circulation pipe (70) connected to the outlet of the accumulator (50), and the lower end of the foreign matter separator (170) may be connected to a refrigerant suction pipe (115). Accordingly, the refrigerant that has flowed into the foreign matter separator (170) through the accumulator (50) may be sucked into the compression chamber (V) through the refrigerant suction pipe (115) after passing through the foreign matter separator (170).

[0082] The first foreign matter filter unit (171) may include a filter fixing ring (1711) and a foreign matter collection net (1712). The filter fixing ring (1711) is a member that is coupled to the foreign matter separator (170), and the foreign matter collection net (1712) is a member that filters foreign matters from the refrigerant. The filter fixing ring (1711) and the foreign matter collection net (1712) may be formed as a single body, or may be assembled separately from each other. This embodiment illustrates an example in which the filter fixing ring (1711) and the foreign matter collection net (1712) are assembled.

[0083] The filter fixing ring (1711) is formed in an annular shape and can be fixedly connected to the inner surface of the foreign matter separator (170) or can be slidably inserted in the axial direction within a preset range. This embodiment illustrates an example in which the filter fixing ring (1711) is fixed to the inner surface of the foreign matter separator (170).

[0084] The foreign matter collection net (1712) is formed in a kind of mesh shape, and may be formed in a convex cup cross-section shape toward the bottom of the foreign matter separator (170) so as to be able to capture the filtered foreign matter. Accordingly, the foreign matter captured in the foreign matter collection net (1712) cannot easily escape, so that the foreign matter can be effectively captured from the refrigerant.

[0085] Referring to FIGS. 2 to 5, the pressure sensing unit (180) according to the present embodiment may include a sensor flow pipe (181), a sensor member (182), and a connecting cable (183). The sensor flow pipe (181) is a member that guides the refrigerant sucked into the compression unit (C) toward the sensor member (182), the sensor member (182) is a member that actually detects the pressure of the refrigerant induced by the sensor flow pipe (181), and the connecting cable (183) is a member that transmits the pressure of the suction refrigerant detected by the sensor member (182) to the control unit (190). Accordingly, when the detected pressure (P2) of the suction refrigerant sucked into the compression chamber (V) is lower than the reference pressure (P1), the operation of the compressor (10) and / or the refrigeration cycle device (1) is stopped, thereby preventing a failure and / or a decrease in efficiency of the compressor (10) and / or the refrigeration cycle device (1) in advance. The pressure sensing unit (180) will be described later together with the foreign matter separator (170) and the control unit (190).

[0086] Referring to FIG. 6, the control unit (190) according to the present embodiment may be provided separately from the cycle control unit (not shown) that controls the refrigeration cycle device (1), or may be provided so as to share the cycle control unit. The present embodiment will be described focusing on an example in which the control unit (190) is provided so as to share the cycle control unit.

[0087] For example, the control unit (190) may be linked to the pressure sensing unit (180) described above. In other words, the control unit (190) may control the operation of the electric unit (120) according to the pressure data of the suction refrigerant (2) transmitted from the pressure sensing unit (180). Accordingly, when the pressure of the refrigerant sucked into the compression chamber (V) is low, the operation of the compressor (10) can be quickly stopped to prevent vacuum operation in advance. The control unit (190) will be described again later together with the foreign matter separator (170) and the pressure sensing unit (180).

[0088] A refrigeration cycle device including a scroll compressor according to the above embodiment can be operated as follows.

[0089] That is, when power is applied to the electric motor (120), rotational force is generated in the rotor (122) and the rotation shaft (125), causing the rotor to rotate, and the rotation scroll (150) eccentrically coupled to the rotation shaft (125) can perform a rotational movement with respect to the fixed scroll (140).

[0090] Then, the volume of the compression chamber (V) can be gradually reduced from the suction pressure chamber formed on the outside of the compression chamber (V) to the intermediate pressure chamber formed continuously toward the center, and then to the discharge pressure chamber in the center. Then, the refrigerant can move to the condenser (20), expander (30), and evaporator (40) of the refrigeration cycle and then be sucked into the compression chamber (V) through the refrigerant suction pipe (115).

[0091] Then, the refrigerant sucked into the compression chamber (V) is compressed while moving along the movement path of the compression chamber (V), and the compressed refrigerant is discharged into the discharge space (not shown) of the discharge cover (160) through the discharge port (1411) and the bypass hole (1412), and this refrigerant can move into the upper space (110b) of the casing (110) through the discharge path (not shown).

[0092] Then, the refrigerant moved to the upper space (110b) is separated into refrigerant and oil in the upper space (110b), and the refrigerant (or some mixed refrigerant from which the oil is not separated) is discharged to the outside of the casing (110) through the refrigerant discharge pipe (116) and can be moved to the condenser (20) of the refrigeration cycle device (1).

[0093] On the other hand, oil (or mixed oil mixed with liquid refrigerant) separated from the refrigerant in the upper space (110b) is recovered to the lower space (110a) through an oil recovery passage (not shown) formed between the inner surface of the casing (110) and the stator (121) and between the inner surface of the casing (110) and the outer surface of the compression section (C), and then supplied to each bearing surface (not shown) through an oil supply passage (1252) provided in the rotating shaft (125), and some of the oil may be supplied to the compression chamber (V). A series of processes in which the oil supplied to the bearing surface and the compression chamber (V) is discharged together with the refrigerant to the discharge cover (160) and recovered may be repeated.

[0094] At this time, since a foreign substance separator (170) is provided on the front end of the refrigerant suction pipe (115), i.e., between the accumulator (50) and the refrigerant suction pipe (115), foreign substances (3) contained in the suction refrigerant are filtered by the first foreign substance filter unit (171) provided in the foreign substance separator (170). Accordingly, oil and liquid refrigerant as well as assembly byproducts can be prevented from being sucked into the compression chamber in advance.

[0095] However, foreign substances filtered by the first foreign substance filter unit (171), such as moisture, may condense in the first foreign substance filter unit (171) and clog the foreign substance collection net (1712) forming the first foreign substance filter unit (171). Then, the suction refrigerant may not pass through the clogged first foreign substance filter unit (171), and the refrigerant may not be smoothly sucked into the compression chamber (V), causing the scroll compressor (10) to enter vacuum operation.

[0096] Accordingly, in the present embodiment, a pressure sensing unit (180) for detecting the pressure of the suction refrigerant may be provided at the rear end of the first foreign substance filter unit (171), that is, between the first foreign substance filter unit (171) and the compression unit (C). Accordingly, the actual pressure of the refrigerant suctioned into the compression chamber (V) can be accurately measured to control the operation of the compressor (10) and / or the refrigeration cycle device (1).

[0097] Referring back to FIGS. 1 and 2, the refrigeration cycle device (1) according to the present embodiment is provided with a foreign matter separator (170) between the discharge side of the evaporator (40) and the suction side of the compressor (10), that is, on the inlet side of the refrigerant suction pipe (115), and a first foreign matter filter unit (171) made of mesh may be provided inside the foreign matter separator (170). Accordingly, foreign matters (3) contained in the suction refrigerant can be prevented from flowing into the compression chamber (V) in advance. Through this, damage to the bearing surface and / or wrap, etc. can be prevented in advance.

[0098] The foreign matter separator (170) can be extended in the longitudinal direction of the casing (110), that is, along the axial direction of the rotation axis (125). Accordingly, the foreign matter (3) is captured by gravity in the foreign matter collection net (1712) forming the first foreign matter filter unit (171), and the foreign matter captured in the foreign matter collection net (1712) can be maintained without escaping to the outside of the first foreign matter filter unit (171) because the foreign matter collection net (1712) is formed in a cup cross-sectional shape.

[0099] At this time, a sensor path pipe (181) forming a pressure sensing unit (180) is connected to the middle of the refrigerant suction pipe (115), i.e., the transverse pipe (115a) of the refrigerant suction pipe (115), to detect the pressure of the suction refrigerant that has passed through the first foreign substance filter unit (171). Accordingly, the actual pressure of the refrigerant suctioned into the compression chamber (V), that is, the pressure of the suction refrigerant changed by the first foreign substance filter unit (171), can be accurately and quickly detected. The pressure sensing unit (180) may be a pressure sensor (e.g., a low-pressure sensor) or a low-pressure switch. In this embodiment, an example in which a pressure sensor is applied will be described.

[0100] Referring to FIGS. 3 to 5, the pressure sensing unit (180) according to the present embodiment may include a sensor flow pipe (181), a sensor member (182), and a connection cable (183) as described above. The sensor flow pipe (181) is formed as a cylindrical pipe having a single diameter (more precisely, an inner diameter), and the sensor member (182) may be applied with a pressure sensor as described above.

[0101] Specifically, the sensor flow pipe (181) can be connected between the first foreign matter filter unit (171) and the compression chamber (V), for example, in the middle of the refrigerant suction pipe (115). Accordingly, regardless of whether foreign matter (3) is condensed in the first foreign matter filter unit (171), the suction refrigerant sucked into the compression chamber (V) can be quickly and accurately guided to the sensor member (182).

[0102] For example, the sensor flow pipe (181) can be connected to the transverse pipe (115a) through which the refrigerant suction pipe (115) is coupled to the casing (110). Accordingly, since the sensor flow pipe (181) is coupled at a position adjacent to the fixing point of the refrigerant suction pipe (115), the pressure sensing unit (180) including the sensor flow pipe (181) can be stably fixed to the refrigerant suction pipe (115) while forming a cantilever shape.

[0103] The sensor flow pipe (181) may be formed as a straight pipe, or may be formed in a shape with a middle portion bent, for example, an “L” shape. When the sensor flow pipe (181) is a straight pipe, it may be extended axially or laterally, and may be formed to be inclined at a preset angle with respect to the axial direction. Here, when the sensor flow pipe (181) is a straight pipe, it may be advantageous to extend it axially so as to minimize the length of the moment arm from the point where the straight pipe is connected. However, when the sensor flow pipe (181) is extended axially, it may not be easy to assemble the sensor flow pipe (181) to the refrigerant suction pipe (115). In the present embodiment, an example in which the sensor flow pipe (181) is formed in an “L” cross-sectional shape is illustrated. Accordingly, the length of the moment arm for the sensor flow pipe (181) can be shortened while improving the assembling ability.

[0104] Referring to FIG. 5, the sensor flow path (181) may include a first pipe section (1811) and a second pipe section (1812). The first pipe section (1811) is a portion connected to the refrigerant suction pipe (115), and the second pipe section (1812) is a portion to which the sensor member (182) is coupled. In other words, the first pipe section (1811) includes a fixed end of the sensor flow path (181), and the second pipe section (1812) includes a free end of the sensor flow path (181). The first pipe section (1811) and the second pipe section (1812) may be formed to be perpendicular to each other. Accordingly, the length from the fixed end to the free end of the sensor pipe (181) can be shortened, while being spaced apart from the foreign matter separator (170) forming the casing (110) and / or the first foreign matter filter unit (171) by an appropriate distance, so that it can be firmly and stably fixed to the refrigerant suction pipe (115).

[0105] The first pipe section (1811) can extend transversely to the casing (110). In other words, the first pipe section (1811) can extend radially along the refrigerant suction pipe (115). Accordingly, the first pipe section (1811) is connected orthogonally to the refrigerant suction pipe (115), thereby facilitating the connection of the sensor flow pipe (181).

[0106] The first pipe section (1811) can be connected by welding or the like to the transverse pipe (115a) forming the outlet end of the “L”-shaped refrigerant suction pipe (115), i.e., the middle of the refrigerant suction pipe (115). Accordingly, as described above, the sensor flow path (181) is connected at a position close to the fixed point of the refrigerant suction pipe (115), thereby reducing vibration caused by the sensor flow path (181) and / or the sensor member (182).

[0107] The length (L1) of the first pipe section (1811) may be formed to be smaller than or equal to the length (L2) of the second pipe section (1812) described later, for example, smaller than the length (L2) of the second pipe section (1812). Accordingly, the moment arm length of the sensor pipe (181) can be shortened, thereby reducing vibration caused by the sensor pipe (181) and / or the sensor member (182). This can increase the assembly reliability and / or detection reliability of the pressure sensing section (180).

[0108] In addition, the diameter (D1) and / or cross-sectional area of ​​the first pipe section (1811) can be formed to be the same as the diameter (D2) and / or cross-sectional area of ​​the second pipe section (1812). Accordingly, not only can the sensor flow path (181) be easily manufactured, but also the pressure difference between the two ends of the sensor flow path (181) does not occur, so the pressure of the suction refrigerant can be detected more accurately.

[0109] Although not shown in the drawing, the diameter (D1) and / or cross-sectional area of ​​the first pipe portion (1811) may be formed to be larger than the diameter (D2) and / or cross-sectional area of ​​the second pipe portion (1812). For example, the diameter (D1) and / or cross-sectional area of ​​the first pipe portion (1811) may be formed to be the same as the diameter (D3) and / or cross-sectional area of ​​the refrigerant suction pipe (115), and the diameter (D2) and / or cross-sectional area of ​​the second pipe portion (1812) may be formed to be smaller than the diameter (D3) and / or cross-sectional area of ​​the refrigerant suction pipe (115). Accordingly, the joining area of ​​the first pipe portion (1811) coupled to the refrigerant suction pipe (115) is expanded, so that the sensor flow path (181) can be stably fixed.

[0110] The second pipe section (1812) may extend longitudinally with respect to the casing (110). In other words, the second pipe section (1812) may extend as a single body from the other end of the first pipe section (1811), but may extend axially with respect to the rotation axis. Accordingly, the second pipe section (1812) may be arranged parallel to the refrigerant suction pipe (115), thereby shortening the length of the moment arm due to the sensor flow pipe (181).

[0111] The diameter (D2) and / or cross-sectional area of ​​the second pipe part (1812) may be formed to be the same as the diameter (D1) and / or cross-sectional area of ​​the first pipe part (1811) as described above. In other words, the second pipe part (1812) may be formed to have the same shape and specifications as the first pipe part (1811). Accordingly, the sensor flow path (181) may be easily formed. However, as described above, the diameter (D2) and / or cross-sectional area of ​​the second pipe part (1812) may be formed to be smaller than the diameter (D1) and / or cross-sectional area of ​​the first pipe part (1811), thereby attenuating vibration caused by the second pipe part (1812).

[0112] Although not shown in the drawing, the second pipe section (1812) may be fixed to the refrigerant suction pipe (115) and / or the foreign matter separator (170) by a separate fixing member (not shown) or may be fixed to a fixing member (not shown) that fixes the foreign matter separator (170) to the casing (110). Accordingly, by fixing the sensor flow pipe (181) at multiple points, the sensor flow pipe (181) can be fixed more stably.

[0113] The sensor member (182) is composed of a type of pressure sensor and can be fixed to the sensor flow pipe (181). For example, the sensor member (182) can be installed at the opposite end of the first pipe section (1811) among the two ends of the second pipe section (1812). Accordingly, the sensor member (182) can quickly detect the pressure of the refrigerant transmitted through the sensor flow pipe (181).

[0114] The sensor member (182) may be installed at a predetermined distance from the casing (110) and / or the foreign matter separator (170) having the first foreign matter filter unit (171). Accordingly, the sensor member (182) can more accurately detect the temperature of the suction refrigerant by minimizing direct transmission of vibration and / or temperature from the casing (110) and / or the foreign matter separator (170).

[0115] The sensor member (182) may be separated from the casing (110) and / or the foreign matter separator (170), but may be electrically connected to the control unit (190) via a connection cable (183). Accordingly, the sensor member (182) may detect the pressure of the suction refrigerant and transmit it to the control unit (190) via the connection cable (183).

[0116] The outer surface of the connecting cable (183) may be formed of a heat-resistant material. Accordingly, the connecting cable (183) can be prevented from melting or deforming when in contact with the compressor (10) and / or the piping around the compressor (10).

[0117] Although not shown in the drawing, the sensor member (182) may be replaced with a low-pressure switch (not shown). The low-pressure switch may close the electrical contact and stop the operation of the compressor (10) when the pressure of the suction refrigerant sucked into the compression chamber (V) is lower than a preset range. When the low-pressure switch is applied, a separate control unit (190) for controlling the low-pressure switch may not be provided. Accordingly, the pressure sensing unit (180) can be simplified, reducing manufacturing costs while increasing reliability. Since an example in which a low-pressure switch detects the pressure of a gas and cuts off the electrical connection is a known technology, a detailed description thereof will be omitted here.

[0118] Referring to FIG. 6, the control unit (190) may include an input unit (191), a judgment unit (192), and an output unit (193). The input unit (191) is a unit that receives pressure and / or temperature detected in the compressor (10) and / or the refrigeration cycle device (1) including the compressor (10), the judgment unit (192) is a unit that compares the detected value input to the input unit (191) with a preset reference value and determines an error indication, whether to operate, and the operation type, and the output unit (193) is a unit that transmits the result determined by the judgment unit (192) to the compressor control unit and / or the cycle control unit (not shown). In the present embodiment, the logic for detecting the suction pressure and controlling to avoid vacuum operation among the low pressure prevention control logic that detects the temperature of the condenser (20) and / or the evaporator (40) as well as the suction pressure of the compressor (10) and controls to avoid vacuum operation will be described with a focus on the logic for detecting the suction pressure and controlling to avoid vacuum operation.

[0119] Specifically, the input unit (191) can be electrically connected to the sensor member (182) via a connecting cable (183) forming part of the pressure sensing unit (180). Accordingly, the detected pressure of the suction refrigerant detected by the sensor member (182) is input to the input unit (191) via the connecting cable (183).

[0120] The judgment unit (192) may be electrically connected to the input unit (191). The judgment unit (192) may be configured with a reference pressure and / or a reference temperature and / or a reference number of errors of the suction refrigerant. Accordingly, the judgment unit (192) may compare the detected pressure transmitted to the input unit (191) with the reference pressure, compare the detected temperature with the reference temperature, or accumulate the number of errors to determine whether the compressor (10) is operating and / or the operating type. Through this, it is possible to quickly suppress the compressor from entering vacuum operation without frequently stopping the compressor, thereby suppressing damage and / or efficiency reduction of the compressor and the refrigeration cycle equipped therewith.

[0121] One end of the output unit (193) may be electrically connected to the judgment unit (192), and the other end of the output unit (193) may be electrically connected to the compressor control unit and / or the cycle control unit (not shown). Accordingly, the result determined by the judgment unit (192), for example, the result of determining whether or not the compressor (10) is operating and / or the operation type, may be transmitted to the compressor control unit and / or the cycle control unit (not shown).

[0122] The operational effects of the pressure sensing unit and the control unit in the above embodiment are as follows.

[0123] That is, since the pressure sensing unit (180) according to the present embodiment is provided between the first foreign matter filter unit (171) and the compression chamber (V), the pressure of the suction refrigerant that has passed through the first foreign matter filter unit (171) can be detected. In other words, the pressure sensing unit (180) according to the present embodiment can detect the pressure of the suction refrigerant immediately in front of the compression chamber (V). Accordingly, it is possible to accurately detect whether the first foreign matter filter unit (171) is blocked by foreign matter, blocked by moisture condensation, or excessively flowing in liquid refrigerant. Through this, it is possible to prevent in advance abnormal operation of the compressor (10), such as vacuum operation, which may occur when the first foreign matter filter unit (171) is blocked by foreign matter and / or moisture condensation.

[0124] In other words, when the sensor member (182) forming the pressure sensing unit (180) is positioned upstream of the first foreign matter filter unit (171), for example, between the evaporator (40) and the accumulator (50), the pressure sensing unit (180) detects the pressure upstream of the first foreign matter filter unit (171). As a result, even if the first foreign matter filter unit (171) is blocked and the suction pressure of the refrigerant actually sucked into the compression chamber is low, the suction pressure detected by the pressure sensing unit (180) is determined to be within the normal range, so that the operation of the compressor (10) and / or the refrigeration cycle device (1) can continue. This may lead to damage to the compressor (10) and / or the refrigeration cycle device (1) as the vacuum operation of the compressor (10) described above occurs.

[0125] However, in the present embodiment, since the pressure sensing unit (180) is located between the first foreign substance filter unit (171) and the compression chamber (V), the pressure of the suction refrigerant detected by the pressure sensing unit (180) and the pressure of the suction refrigerant actually sucked into the compression chamber (V) can be the same. Accordingly, in the present embodiment, by accurately detecting the pressure of the suction refrigerant sucked into the compression chamber (V) and controlling the operation of the compressor (10), the compressor (10) can be prevented from performing vacuum operation in advance.

[0126] Fig. 7 is a flowchart showing low pressure prevention control operation in a refrigeration cycle device equipped with a pressure sensing unit according to the present embodiment.

[0127] Referring to Fig. 7, when the compressor (10) and / or the refrigeration cycle device (1) is operated, cooling or heating operation begins. Then, the refrigerant compressed in the compressor (10) passes through the condenser (20), expander (30), and evaporator (40) in sequence and is sucked back into the compressor (10), repeating the cycle.

[0128] At this time, a pressure sensing unit (180) is provided in the refrigerant suction pipe (115) connecting the outlet of the evaporator (40) and the suction side of the compressor (10), or more precisely, between the foreign matter separator (170) and the casing (110), to detect the pressure of the refrigerant sucked into the compression chamber (V).

[0129] Thereafter, the detection pressure (P2) of the suction refrigerant detected by the pressure sensing unit (180) is input to the input unit (191) of the control unit (190), and the judgment unit (192) of the control unit (190) compares the received detection pressure (P2) with the preset reference pressure (P1). If the detection pressure (P2) is higher than or equal to the reference pressure (P1), it is determined that the first foreign matter filter unit (171) is not clogged, and a command to continue the previous cooling / heating operation is transmitted to the cycle control unit (not shown) through the output unit (193). However, if the detection pressure (P2) is lower than the reference pressure, it is determined that the first foreign matter filter unit (171) is clogged, and a command to restrict the power supply to the compressor (10) or stop the compressor operation is transmitted to the cycle control unit (not shown) through the output unit (193). Then, the power supply to the compressor (10) is limited or the operation of the compressor (10) is temporarily stopped to prevent vacuum operation.

[0130] At this time, as described above, the operation of the compressor (10) can be determined by detecting the suction pressure of the refrigerant sucked into the compressor (10), but in some cases, the operation of the compressor (10) can also be determined by detecting the refrigerant temperature of the refrigeration cycle device (1). For example, the temperature of the evaporator (40) and / or the condenser (20) is detected, and the detected temperature (T2) is compared with the reference temperature (T1), and then, based on the result, even if the detected temperature (T2) is lower than the reference temperature (T1), the power supply to the compressor (10) can be restricted to temporarily stop the operation of the compressor (10). This can be done by comparing the detected pressure (P2) and the reference pressure (P1) described above, and simultaneously comparing the detected temperature (T2) and the reference temperature (T1) described above, and temporarily stopping the operation of the compressor (10) if both conditions are satisfied.

[0131] Thereafter, in the judgment unit (192), when the compressor (10) is restarted, the pressure sensing unit (180) and the control unit (190) detect the pressure of the suction refrigerant as described above, compare the detected pressure (P2) with the set reference pressure (P1), and accumulate the number of times the detected pressure (P2) is lower than the reference pressure (P1). When the accumulated number reaches a preset accumulated number (e.g., 10 times), it is determined that there is an error in the compressor (10) and / or the refrigeration cycle device (1). Then, the judgment unit (192) issues a command to display the error state externally through the output unit (193), and at the same time issues a command to stop the operation of the compressor (10) and / or the refrigeration cycle device (1) or to perform protective operation. Then, the display unit (194) displays an error, and the cycle control unit (not shown) stops the operation of the compressor (10) and / or the refrigeration cycle device (1) or initiates protective operation. Accordingly, the compressor can be quickly prevented from entering vacuum operation, thereby preventing damage and / or efficiency reduction of the compressor and the refrigeration cycle equipped therewith.

[0132] Meanwhile, there are other examples of the installation location of the pressure sensing unit as follows.

[0133] That is, in the embodiment described above, the sensor pipe is welded and connected to the middle of the suction refrigerant pipe, that is, to the transverse pipe, but in some cases, the sensor pipe may be welded and connected to the longitudinal pipe of the suction refrigerant pipe.

[0134] Fig. 8 is a perspective view showing another embodiment of the installation location of the pressure sensing unit.

[0135] Referring to Fig. 8, the basic configuration and operating method of the scroll compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) equipped therewith are almost the same as those of the above-described embodiment. For example, a refrigerant suction pipe (115) penetrating the casing (110) is directly connected to the compression chamber of the scroll compressor (10), and a foreign matter separator (170) equipped with a first foreign matter filter unit (171) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser, expander, and evaporator (40) may pass through the foreign matter separator (170) and be sucked into the compression chamber of the compressor (10).

[0136] In this case, too, a pressure sensing unit (180) is connected to the rear side of the first foreign substance filter unit (171), that is, the refrigerant suction pipe (115), so as to detect the pressure of the suction refrigerant between the first foreign substance filter unit (171) and the compression chamber (V). Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether or not the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operational effects of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiment.

[0137] However, in the present embodiment, the sensor flow pipe (181) forming the pressure sensing unit (180) may be welded and connected to the middle of the refrigerant suction pipe (115), that is, to the longitudinal pipe (115b) arranged parallel to the casing (110) among the refrigerant suction pipes (115). Accordingly, the sensor flow pipe (181) according to the present embodiment may be connected to the refrigerant suction pipe (115) at a location far away from the point where the casing (110) and the refrigerant suction pipe (115) are connected. Through this, not only is the work space secured wide during assembly of the sensor flow pipe (181), making it easy to assemble the pressure sensing unit (180) including the sensor flow pipe (181), but also the welding heat generated during welding of the sensor flow pipe (181) is reduced from being transferred to the casing (110), thereby suppressing thermal deformation of components within the casing (110).

[0138] Although not shown in the drawing, the sensor flow pipe (181) may be connected by welding to the bent portion of the refrigerant suction pipe (115), that is, to the bent pipe (not shown) between the horizontal pipe (115a) and the longitudinal pipe (115b). In this case, the configuration of the pressure sensing unit (180) including the sensor flow pipe (181) and the resulting operational effect are almost the same as those in the above-described embodiments, and therefore, the description thereof will be replaced with that in the above-described embodiments.

[0139] Meanwhile, another example of the installation location of the pressure sensing unit is as follows.

[0140] That is, in the embodiments described above, the sensor pipe is welded and connected to the middle of the suction refrigerant pipe, but in some cases, the sensor pipe may be welded and connected to a foreign matter separator connected to the suction refrigerant pipe.

[0141] Fig. 9 is a perspective view showing another embodiment of the installation location of the pressure sensing unit.

[0142] Referring to Fig. 9, the basic configuration and operating method of the compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) having the same are almost the same as those of the above-described embodiment. For example, a refrigerant suction pipe (115) penetrating the casing (110) may be directly connected to the compression chamber (V) of the compressor (10), and a foreign matter separator (170) having a first foreign matter filter unit (171) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser (20), expander (30), and evaporator (40) may pass through the foreign matter separator (170) and be sucked into the compression chamber (V) of the compressor (10).

[0143] In this case, too, a pressure sensing unit (180) is connected to the rear side of the first foreign substance filter unit (171), that is, to the foreign substance separator (170), so as to detect the pressure of the suction refrigerant between the first foreign substance filter unit (171) and the compression chamber (V). Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether or not the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operation effect of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiment.

[0144] However, in the present embodiment, the sensor flow pipe (181) forming the pressure sensing unit (180) may be welded and connected to the foreign substance separator (170) at the outer surface of the foreign substance separator (170), that is, at the rear side of the foreign substance collection net (1712) of the first foreign substance filter unit (171). Accordingly, the sensor flow pipe (181) according to the present embodiment may be connected to the refrigerant suction pipe (115) at a location further away from the point where the casing (110) and the refrigerant suction pipe (115) are connected. Through this, the work space is secured wider when assembling the sensor pipe (181), making it easier to assemble the pressure sensing unit (180) including the sensor pipe (181). In addition, the welding heat generated when welding the sensor pipe (181) is further reduced from being transferred to the casing (110), so that thermal deformation of the components within the casing (110) can be more effectively suppressed.

[0145] Meanwhile, there are other examples of pressure sensing units as follows.

[0146] That is, in the embodiments described above, the sensor pipe is always open, but in some cases, the sensor pipe may be selectively opened or closed.

[0147] Fig. 10 is a cross-sectional view showing another example of a foreign substance separator equipped with a pressure sensing unit.

[0148] Referring to Fig. 10, the basic configuration and operating method of the compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) equipped therewith are almost the same as those of the above-described embodiment. For example, a refrigerant suction pipe (115) penetrating the casing (110) may be directly connected to the compression chamber (V) of the compressor (10), and a foreign matter separator (170) equipped with a first foreign matter filter unit (171) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser (20), expander (30), and evaporator (40) may pass through the foreign matter separator (170) and be sucked into the compression chamber of the compressor (10).

[0149] In this case, a pressure sensing unit (180) is provided at the rear side of the first foreign substance filter unit (171) to detect the pressure of the suction refrigerant between the first foreign substance filter unit (171) and the compression chamber. Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operation effect of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiment.

[0150] However, in the present embodiment, an on-off valve (1815) may be provided in the middle of the sensor flow pipe (181), for example, between the first pipe portion (1811) forming the sensor flow pipe (181) and the refrigerant suction pipe (115). Accordingly, the movement of the suction refrigerant from the refrigerant suction pipe (115) to the sensor flow pipe (181) can be controlled by the on-off valve (1815). Through this, when there is a problem with the pressure sensing unit (180) or when the pressure sensing unit (180) is not in use, the on-off valve (1815) can be closed to block the movement of the refrigerant to the sensor flow pipe (181).

[0151] The on-off valve (1815) may be a mechanical valve or a solenoid valve. If the on-off valve (1815) is a solenoid valve, it may be electrically connected to the output unit (193) of the control unit (190) described above. Through this, the on-off valve (1815) can be controlled in real time by the control unit (190).

[0152] Although not illustrated in the drawing, the same can be applied when the sensor flow pipe (181) is welded and connected to the accumulator (50). In other words, the previously described on-off valve (1815) can be provided at the point where the sensor flow pipe (181) and the accumulator (50) are connected. Accordingly, the movement of refrigerant from the accumulator (50) to the sensor flow pipe (181) can be selectively restricted.

[0153] Meanwhile, there are other examples of foreign matter separators as follows.

[0154] That is, in the above-described embodiments, the foreign substance filter unit provided in the foreign substance separator only serves to filter foreign substances from the refrigerant, but in some cases, the foreign substance filter unit may be selectively heated to remove foreign substances.

[0155] Fig. 11 is a cross-sectional view showing another example of a foreign substance separator equipped with a pressure sensing unit.

[0156] Referring to Fig. 11, the basic configuration and operating method of the compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) having the same are almost the same as those of the above-described embodiments. For example, a refrigerant suction pipe (115) penetrating the casing (110) may be directly connected to the compression chamber (V) of the compressor (10), and a foreign matter separator (170) having a first foreign matter filter unit (171) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser (20), expander (30), and evaporator (40) may pass through the accumulator (50) and / or the foreign matter separator (170) and be sucked into the compression chamber of the compressor (10).

[0157] In this case, too, a pressure sensing unit (180) is connected to the rear side of the first foreign substance filter unit (171), that is, the foreign substance separator (170) and / or the refrigerant suction pipe (115), so as to detect the pressure of the suction refrigerant between the first foreign substance filter unit (171) and the compression chamber (V). Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether or not the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operational effects of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiments.

[0158] In addition, the foreign matter separator (170) according to the present embodiment may include a first foreign matter filter unit (171) as in the above-described embodiments. Accordingly, the refrigerant flowing into the foreign matter separator (170) passes through the first foreign matter filter unit (171) including the first foreign matter filter net (1712), thereby filtering out foreign matters. Through this, foreign matters can be prevented from being sucked into the compression chamber (V).

[0159] However, in this embodiment, a heat transfer member (1713) may be provided in the first foreign substance filter unit (171), and a power supply unit (1714) capable of supplying power to the heat transfer member (1713) may be provided in the foreign substance separator (170).

[0160] For example, the heat transfer member (1713) may be formed in a ring shape or in a mesh shape like the foreign substance capture net (1712) and may be provided on at least one of the outer and inner surfaces of the foreign substance capture net (1712), and the foreign substance capture net (1712) itself may be formed of a heat transfer material. This embodiment illustrates an example in which the heat transfer member (1713) formed in a ring shape is attached to the lower half of the foreign substance capture net (1712). Accordingly, while the heat transfer member (1713) is formed in a ring shape, a sufficient flow area of ​​the refrigerant is secured, thereby maintaining volumetric efficiency and effectively suppressing vacuum operation.

[0161] The power supply unit (1714) is provided on the outer surface of the foreign matter separator (170) and can be electrically connected to the first foreign matter filter unit (171), that is, the heat transfer member (1713). Accordingly, as the heat transfer member (1713) is heated by the power supplied by the power supply unit (1714), the blockage caused by moisture condensation in the first foreign matter filter unit (171) can be eliminated.

[0162] The power supply unit (1714) may be connected to an external power source and supply power from the external power source to the heat transfer member (1713), or may store power in a separately provided secondary battery and then supply it to the heat transfer member (1713).

[0163] In the case where the heat transfer member (1713) is provided in the first foreign substance filter unit (171) as described above, the first foreign substance filter unit (171) can be fixedly installed inside the foreign substance separator (170) while quickly resolving the clogging phenomenon of the first foreign substance filter unit (171). This simplifies the assembly structure of the first foreign substance filter unit (171), thereby reducing the manufacturing cost and increasing the assembly reliability of the first foreign substance filter unit (171).

[0164] Although not illustrated in the drawing, even in the case where the second foreign substance filter unit (51) to be described later is applied to the accumulator (50), the second foreign substance filter unit (51) may be fixed to the accumulator (50) as described above, but a heat transfer member (not shown) connected to a power supply unit (not shown) may be provided on the second foreign substance filter unit (51). Since the configuration and operational effects thereof are almost the same as those of the above-described example, the description thereof will be replaced with the description of the above-described example.

[0165] Meanwhile, another example of a foreign substance separator is as follows.

[0166] That is, in the embodiment described above, foreign substances are removed while the foreign substance filter part is fixed, but in some cases, the foreign substance filter part may be moved so that a bypass path for the refrigerant is formed.

[0167] Fig. 12 is a cross-sectional view showing another example of a foreign substance separator equipped with a pressure sensing unit.

[0168] Referring to Fig. 12, the basic configuration and operating method of the compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) equipped therewith are almost the same as those of the above-described embodiments. For example, a refrigerant suction pipe (115) penetrating the casing (110) may be directly connected to the compression chamber (V) of the compressor (10), and a foreign matter separator (170) equipped with a first foreign matter filter unit (171) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser, expander, and evaporator (40) may pass through the accumulator (50) and / or the foreign matter separator (170) and be sucked into the compression chamber (V) of the compressor (10).

[0169] Even in this case, the foreign matter separator (170) according to the present embodiment may include a first foreign matter filter unit (171) as in the above-described embodiments. Accordingly, the refrigerant flowing into the foreign matter separator (170) passes through the first foreign matter filter unit (171) including the first foreign matter filter net (1712), thereby filtering out foreign matters. Through this, foreign matters can be prevented from being sucked into the compression chamber (V).

[0170] Also in this case, a pressure sensing unit (180) is connected to the rear side of the first foreign substance filter unit (171), that is, the foreign substance separator (170) and / or the refrigerant suction pipe (115), so as to detect the pressure of the suction refrigerant between the first foreign substance filter unit (171) and the compression chamber (V). Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether or not the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operational effects of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiments.

[0171] However, in the present embodiment, the first foreign substance filter unit (171) is axially movably coupled to the foreign substance separator (170), and a groove and / or hole forming a bypass passage unit (1715) may be formed between the inner surface of the foreign substance separator (170) and the outer surface of the foreign substance filter unit (171) facing it. In the present embodiment, an example in which the bypass passage unit (1715) is formed as a groove is illustrated.

[0172] For example, a filter receiving groove (170a) is formed in a ring shape on the inner surface of the foreign substance separator (170), and a filter fixing ring (1711) forming the first foreign substance filter unit (171) can be axially slidably inserted into the filter receiving groove (170a). The diameter of the filter receiving groove (170a) can be formed to be larger than the outer diameter of the filter fixing ring (1711). Accordingly, a gap is generated between the inner surface of the filter fixing groove (170a) and the outer surface of the filter fixing ring (1711), and the bypass passage portion (1715) described above can be formed using this gap. Accordingly, the bypass passage portion (1715) can be easily formed.

[0173] In this case, an elastic member (1716) such as a compression coil spring may be provided between the foreign substance separator (170) and the first foreign substance filter unit (171), that is, between the filter receiving groove (170a) and the filter fixing ring (1711). The elastic member (1716) may be formed to elastically support the filter fixing ring (1711) in a direction away from the compression chamber (V), that is, in a direction in which the bypass passage (1715) is blocked. Accordingly, when the amount of foreign substances captured in the foreign substance capturing net (1712) is small or the degree of blockage of the foreign substance capturing net (1712) is not great, the first foreign substance filter unit (171) rises by the elastic force of the elastic member (1716) to close the bypass passage (1715). Then, the refrigerant flowing into the foreign substance separator (170) can pass through the first foreign substance filter unit (171) and be quickly sucked into the compression chamber (V).

[0174] On the other hand, when the amount of foreign substances captured in the foreign substance capture net (1712) is large or the degree of blockage of the foreign substance capture net (1712) is large, the first foreign substance filter unit (171) overcomes the elastic force of the elastic member (1716) and descends to open the bypass passage unit (1715). Then, even if the refrigerant flowing into the foreign substance separator (170) is restricted from moving to the compression chamber (V) by the first foreign substance filter unit (171), it can be sucked into the compression chamber (V) by bypassing it through the bypass passage unit (1715). Through this, vacuum operation in the compressor (10) can be prevented in advance.

[0175] Although not shown in the drawing, a groove forming a bypass passage (1715) may be separately formed on the inner surface of the filter receiving groove (170a) and / or the outer surface of the filter fixing ring (1711). In this case, the cross-sectional area of ​​the bypass passage (1715) is secured widely, so that when the foreign matter collection net (1712) is blocked, the refrigerant can be quickly bypassed and moved.

[0176] As described above, when the bypass passage (1715) is formed between the foreign substance separator (170) and the first foreign substance filter unit (171), that is, between the inner surface of the filter receiving groove (170a) and the outer surface of the filter fixing ring (1711), the structure of the bypass passage (1715) can be simplified, thereby reducing the manufacturing cost of the bypass passage (1715). In addition, the piping structure around the foreign substance separator (170) can be simplified, thereby securing a wider assembly space for the pressure sensing unit (180).

[0177] Although not illustrated in the drawing, even when the second foreign substance filter unit (51) is applied to the accumulator (50), the bypass flow path unit (not illustrated) may be formed inside the accumulator (50) using the bypass home (not illustrated) as described above. Since the configuration and operational effects thereof are almost identical to those of the above-described example, the description thereof will be replaced with the description of the above-described example.

[0178] Meanwhile, another example of a foreign substance separator is as follows.

[0179] That is, in the above-described embodiment, the bypass flow path is formed inside the foreign substance separator, but in some cases, the bypass flow path may be formed outside the foreign substance separator.

[0180] Fig. 13 is a cross-sectional view showing another embodiment of a foreign substance separator equipped with a pressure sensing unit.

[0181] Referring to Fig. 13, the basic configuration and operating method of the compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) equipped therewith are almost the same as those of the above-described embodiments. For example, a refrigerant suction pipe (115) penetrating the casing (110) may be directly connected to the compression chamber (V) of the compressor (10), and a foreign matter separator (170) equipped with a first foreign matter filter unit (171) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser, expander, and evaporator (40) may pass through the accumulator (50) and / or the foreign matter separator (170) and be sucked into the compression chamber (V) of the compressor (10).

[0182] Even in this case, the foreign matter separator (170) according to the present embodiment may include a first foreign matter filter unit (171) as in the above-described embodiments. Accordingly, the refrigerant flowing into the foreign matter separator (170) passes through the first foreign matter filter unit (171) including the first foreign matter filter net (1712), thereby filtering out foreign matters. Through this, foreign matters can be prevented from being sucked into the compression chamber (V).

[0183] Also in this case, a pressure sensing unit (180) is connected to the rear side of the first foreign substance filter unit (171), that is, the foreign substance separator (170) and / or the refrigerant suction pipe (115), so as to detect the pressure of the suction refrigerant between the first foreign substance filter unit (171) and the compression chamber (V). Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether or not the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operational effects of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiments.

[0184] Also in this case, the first foreign matter filter unit (171) in the present embodiment is axially movably coupled to the foreign matter separator (170), and an entrance of a bypass passage unit (1715) can be formed between the inner surface of the foreign matter separator (170) and the outer surface of the first foreign matter filter unit (171) facing it. Accordingly, when the first foreign matter filter unit (171) rises, the bypass passage unit (1715) is closed, whereas when the first foreign matter filter unit (171) descends, the bypass passage unit (1715) is opened, so that even if the first foreign matter filter unit (171) is blocked by foreign matter, refrigerant can be sucked into the compression chamber (V).

[0185] However, in the present embodiment, the bypass flow path (1715) may be formed to be connected to the outside of the foreign matter separator (170). For example, the foreign matter separator (170) may have a bypass inlet (170b) formed on one axial side and a bypass outlet (170c) formed on the other axial side, with the first foreign matter filter unit (171) interposed therebetween, and the bypass inlet (170b) and the bypass outlet (170c) may be connected by a bypass pipe (1715a).

[0186] The bypass inlet (170b) may be formed to be connected to the filter receiving groove (170a) of the foreign substance separator (170) described above. Accordingly, the bypass inlet (170b) may be selectively opened and closed by the filter fixing ring (1711) of the first foreign substance filter unit (171).

[0187] The bypass outlet (170c) may be formed to penetrate the foreign substance separator (170) from below the foreign substance collection net (1712). Accordingly, the refrigerant bypassed through the bypass pipe (1715a) can quickly move to the refrigerant suction pipe (115) while avoiding the foreign substance collection net (1712).

[0188] In the case where the bypass passage (1715) is formed outside the foreign matter separator (170) through the bypass pipe (1715a) as described above, the cross-sectional area of ​​the bypass passage (1715) can be sufficiently secured, so that when the first foreign matter filter section (171) is blocked, the refrigerant can be quickly bypassed and guided to the compression chamber (V).

[0189] Although not illustrated in the drawing, even when the second foreign substance filter unit (51) is applied to the accumulator (50), the bypass flow path unit (not illustrated) may be formed on the outside of the accumulator (50) using a bypass pipe (not illustrated) as described above. Since the configuration and operational effects thereof are almost identical to those of the above-described example, the description thereof will be replaced with the description of the above-described example.

[0190] Meanwhile, another example of the installation location of the pressure sensing unit is as follows.

[0191] That is, in the above-described embodiments, a foreign matter separator is provided between the evaporator and the compressor, and the sensor flow pipe is welded and connected to the foreign matter separator and / or the refrigerant suction pipe. However, if a foreign matter filter unit is provided in the accumulator, the sensor flow pipe may be welded and connected to the accumulator and / or the foreign matter separator and / or the refrigerant suction pipe. In this case, the foreign matter separator in the above-described embodiments may be excluded, and the accumulator and the refrigerant suction pipe may be connected, or the foreign matter separator in the above-described embodiments may be connected between the accumulator and the refrigerant suction pipe. In these cases as well, as long as the foreign matter filter unit is provided in the accumulator, the sensor flow pipe forming the pressure sensing unit may be connected to the accumulator. The following description focuses on an example in which the foreign matter separator is excluded, and the accumulator and the refrigerant suction pipe are connected.

[0192] Fig. 14 is a schematic diagram showing a refrigeration cycle device in which a pressure sensing unit according to the present embodiment is applied to an accumulator, and Fig. 15 is a perspective view showing a scroll compressor including the accumulator in Fig. 14.

[0193] Referring to FIGS. 14 and 15, the basic configuration and operating method of the compressor (10) including the pressure sensing unit (180) according to the present embodiment and the refrigeration cycle device (1) having the same are almost the same as those of the above-described embodiment. For example, a refrigerant suction pipe (115) penetrating the casing (110) is directly connected to the compression chamber of the compressor (10), and an accumulator (50) having a foreign matter filter unit (hereinafter, defined as a second foreign matter filter unit to distinguish it from the first foreign matter filter unit described above) (172) may be connected to the refrigerant suction pipe (115). Accordingly, the refrigerant discharged from the compressor (10) and sequentially passed through the condenser (20), expander (30), and evaporator (40) may pass through the accumulator (50) and be sucked into the compression chamber (V) of the compressor (10).

[0194] Even in this case, the second foreign matter filter unit (51) may include a second filter fixing ring (511) and a second foreign matter collection net (512). The second filter fixing ring (511) may correspond to the first filter fixing ring (1711), and the second foreign matter collection net (512) may correspond to the first foreign matter collection net (1712). Accordingly, the second filter fixing ring (511) is replaced with the description of the first filter fixing ring (1711), and the second foreign matter collection net (512) is replaced with the description of the first foreign matter collection net (1712).

[0195] In addition, in this case, a pressure sensing unit (180) is provided on the rear side of the second foreign substance filter unit (51), that is, on the accumulator (50) and / or the refrigerant suction pipe (115), so as to detect the pressure of the suction refrigerant between the second foreign substance filter unit (51) and the compression chamber (V). Accordingly, the actual suction pressure of the refrigerant sucked into the compression chamber (V) can be detected. In addition, by controlling whether or not the compressor (10) is operated based on this, the vacuum operation of the compressor (10) can be effectively prevented. Since the configuration and the resulting operational effects of the pressure sensing unit (180) and / or the control unit (190) are almost the same as those of the above-described embodiment, the description thereof will be replaced with the description of the above-described embodiment.

[0196] However, in the present embodiment, since an accumulator (50) is provided between the evaporator (40) and the refrigerant suction pipe (115), and a second foreign substance filter unit (51) including a second foreign substance collection net (512) is provided on the inlet side of the accumulator (50), the sensor flow pipe (181) forming the pressure sensing unit (180) can be welded and connected so as to be positioned at the lower half of the accumulator (50), that is, at the rear end relative to the second foreign substance filter unit (51). Accordingly, the sensor flow pipe (181) according to the present embodiment can be connected to the accumulator (50) at a location further away from the point where the casing (110) and the refrigerant suction pipe (115) are connected. Through this, not only can the working space be secured wider when assembling the sensor pipe (181), but also, by connecting the sensor pipe (181) to an accumulator (50) having a larger diameter than the refrigerant suction pipe (115) or the foreign substance separator (170), the assembly of the pressure sensing unit (180) including the sensor pipe (181) can be made easier. In addition, the welding heat generated during welding of the sensor pipe (181) is further reduced from being transferred to the casing (110), so that thermal deformation of the components within the casing (110) can be more effectively suppressed.

[0197] Meanwhile, although not shown in the drawing, even when the first foreign substance filter unit (171) is provided in the foreign substance separator (170) and the second foreign substance filter unit (51) is provided in the accumulator (50), the pressure sensing unit (180) can be applied in the same manner as in the embodiments described above.

Claims

1. Casing; A compression unit having a compression chamber provided inside the above casing to compress refrigerant; A refrigerant suction pipe penetrating the above casing and directly connected to the compression chamber; A foreign matter separator having a foreign matter filter unit connected to the above refrigerant suction pipe to separate foreign matters from the refrigerant sucked into the compression chamber; and It includes a pressure sensing unit that detects the pressure of the refrigerant sucked into the compression chamber, The above pressure sensing unit, A compressor provided at the rear end of the foreign substance filter unit based on the suction direction of the refrigerant.

2. In paragraph 1, The above pressure sensing unit, sensor duct; and It includes a sensor member provided in the above sensor pipe and detecting the pressure of the refrigerant transmitted through the sensor pipe, The above sensor pipe is, A compressor coupled to be connected to the above refrigerant suction pipe or the above foreign matter separator.

3. Includes a compressor, a condenser, an expander and an evaporator; A foreign substance filter unit is provided in the suction path between the evaporator and the compressor to filter foreign substances from the refrigerant moving from the evaporator to the compressor. A pressure sensing unit is provided in the above suction passage to detect the pressure of the refrigerant sucked into the compressor, The above pressure sensing unit, A refrigeration cycle device connected to the suction path at the rear end of the foreign substance filter unit based on the suction direction of the refrigerant.

4. In paragraph 3, A refrigerant suction pipe is connected to the above compressor, The above pressure sensing unit, A refrigeration cycle device connected to the above refrigerant suction pipe.

5. In paragraph 3, One end of a refrigerant suction pipe is connected to the above compressor, and a foreign matter separator equipped with the foreign matter filter unit is connected to the other end of the refrigerant suction pipe. The above pressure sensing unit, A refrigeration cycle device connected to the foreign substance separator at the rear end of the foreign substance filter unit.

6. In paragraph 3, One end of a refrigerant suction pipe is connected to the above compressor, and an accumulator equipped with the foreign substance filter is connected to the other end of the refrigerant suction pipe. The above pressure sensing unit, A refrigeration cycle device connected to the accumulator at the rear end of the foreign substance filter unit.

7. In paragraph 3, One end of a refrigerant suction pipe is connected to the compressor, and a foreign matter separator equipped with a first foreign matter filter unit is connected to the other end of the refrigerant suction pipe, and an accumulator equipped with a second foreign matter filter unit is connected between the foreign matter separator and the evaporator. The above pressure sensing unit, A refrigeration cycle device connected to at least one of the refrigerant suction pipe, the foreign substance separator at the rear end of the first foreign substance filter unit, and the accumulator at the rear end of the second foreign substance filter unit.

8. In paragraph 3, The above pressure sensing unit, A sensor pipe connected to the suction path at the rear end of the foreign substance filter section; and A refrigeration cycle device including a sensor member provided at the other end of the sensor pipe and detecting the pressure of refrigerant transmitted through the sensor pipe.

9. In paragraph 8, The above sensor pipe is, A first pipe part connected to the above suction passage; and Including a second pipe part extending from the other end of the first pipe part toward the sensor member, A refrigeration cycle device in which the first pipe section and the second pipe section are formed by bending so as to intersect each other.

10. In paragraph 9, The above first pipe section is formed to extend in the radial direction of the compressor, The above second pipe section is formed to extend in the axial direction of the compressor, The length of the above first section is A compressor formed to be shorter than or equal to the length of the second pipe section.

11. In paragraph 9, The above first pipe section is formed to extend in the radial direction of the compressor, The above second pipe section is formed to extend in the axial direction of the compressor, The diameter of the above first pipe is A compressor formed to have a diameter greater than or equal to the diameter of the second pipe section.

12. In paragraph 3, A refrigeration cycle device further comprising a control unit electrically connected to the pressure sensing unit and controlling the operation of the compressor according to pressure data transmitted from the pressure sensing unit.

13. In paragraph 12, The above control unit, A refrigeration cycle device including a judgment unit that compares the detected pressure transmitted from the pressure sensing unit with a preset reference pressure, and if the detected pressure is lower than the reference pressure, determines that it is an error state and limits the power supply to the compressor.

14. In paragraph 13, The above control unit, A refrigeration cycle device that accumulates the number of times the power supply of the compressor is restricted and stops the operation of the refrigeration cycle device or starts protective operation when the accumulated number reaches a preset number.

15. In paragraph 14, A refrigeration cycle device further comprising a display unit electrically connected to the control unit to externally display the operating status of the refrigeration cycle device.

16. In any one of paragraphs 3 to 15, The above foreign substance filter unit is electrically connected to the power supply unit, The above power supply unit, A refrigeration cycle device that supplies power to the foreign substance filter unit so that the foreign substance filter unit generates heat when the detected pressure of the refrigerant detected by the pressure sensing unit is lower than a preset reference pressure.

17. In any one of paragraphs 3 to 15, The front and rear ends of the above foreign matter filter section are connected to a bypass passage, The above bypass euro part is, A refrigeration cycle device having a groove or hole formed on the inner surface of a member in which the foreign substance filter part is provided.

18. In any one of paragraphs 3 to 15, The front and rear ends of the above foreign matter filter section are connected to a bypass passage, The above bypass euro part is, A refrigeration cycle device formed by a bypass pipe connected to a member having the above foreign substance filter unit.

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