WO2018173492A1 - Muffler, and air conditioner - Google Patents

Muffler, and air conditioner Download PDF

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Publication number
WO2018173492A1
WO2018173492A1 PCT/JP2018/003161 JP2018003161W WO2018173492A1 WO 2018173492 A1 WO2018173492 A1 WO 2018173492A1 JP 2018003161 W JP2018003161 W JP 2018003161W WO 2018173492 A1 WO2018173492 A1 WO 2018173492A1
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WO
WIPO (PCT)
Prior art keywords
main body
diameter
piping
pipe
tip
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Application number
PCT/JP2018/003161
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French (fr)
Japanese (ja)
Inventor
恵介 三苫
晋一 五十住
正也 倉地
貴之 服部
隆博 加藤
達弘 安田
Original Assignee
三菱重工サーマルシステムズ株式会社
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Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Priority to CN201880004496.6A priority Critical patent/CN109996959A/en
Publication of WO2018173492A1 publication Critical patent/WO2018173492A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/12—Vibration or noise prevention thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

Definitions

  • the present invention relates to a silencer and an air conditioner.
  • Compressor, condenser, expansion valve, evaporator, etc. are provided in the refrigerant circuit of the air conditioner.
  • the compressor sucks the refrigerant, compresses the sucked refrigerant, and discharges it further. Since the suction, compression, and discharge of the refrigerant in the compressor are repeatedly performed, pulsation occurs in the compressor, and the pulsation is a generation source of noise. Therefore, a silencer (muffler) is installed in the piping of the refrigerant circuit to reduce noise due to pulsation.
  • the muffler is installed in the vicinity of the discharge port in the pipe between the discharge port of the compressor and the condenser.
  • connection pipes are connected to the inlet side and the outlet side of the muffler body, respectively, and the tip of the connection pipe connected to the inlet side is the muffler. It is disclosed that it is inserted until it is located inside the main body and in the vicinity of the center plane in the longitudinal direction of the muffler main body.
  • the muffler has a relationship between the inner diameter of the muffler main body and the inner diameter of the pipe connected to the inlet or outlet of the muffler main body, and the noise reduction effect by the muffler increases as the muffler main body inner diameter / (pipe inner diameter) increases.
  • this coefficient ((muffler main body inner diameter) / (piping inner diameter))
  • the inner diameter of the muffler main body is increased, the size of the muffler main body is increased and the cost is increased.
  • a larger installation space for the muffler is required, and it is not possible to save space for the devices.
  • the inner diameter of the pipe connected to the muffler is reduced, there is a problem that the pressure loss generated inside the pipe increases.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a silencer and an air conditioner capable of efficiently reducing noise with a simple configuration.
  • the silencer according to the first aspect of the present invention has a cylindrical shape that is long in the axial direction, and a main body that is disposed substantially parallel to the vertical direction during installation, and the main body that is positioned above during installation.
  • the first piping part that is penetrated and connected at the axial end on one side of the part and the tip is disposed inside the main body part, and opposite to the one side of the main body part that is positioned below during installation
  • a second pipe part connected to the other axial end part and having a tip disposed inside the main body part, wherein the first pipe part and the second pipe part are connected to the main body part.
  • the diameter of the tip located inside the main body is smaller than the diameter of the portion.
  • the 1st piping part is penetrated and connected in the axial direction edge part of the one side of the main-body part which has a cylindrical shape long in an axial direction
  • a 2nd piping part is the axis
  • the first pipe part and the second pipe part are both connected through at the end in the direction, and the distal ends of the first pipe part and the second pipe part are arranged inside the main body part.
  • tip located inside a main-body part is smaller than the diameter of the connection part with a main-body part, a 1st piping part and a 2nd piping part can reduce noise more effectively.
  • first piping portion and the second piping portion may have the same diameter at the connection portion with the main body portion and the diameter at the portion located outside the main body portion.
  • the main body part of this aspect can be shared with the silencer of another aspect to which a pipe having a small tip diameter located inside the main body part is connected.
  • the length of the reduced diameter portion having a small diameter in the first piping portion and the second piping portion may be 15 mm or less from the tip.
  • the length of the reduced diameter portion is 15 mm or less, it is possible to reduce the pressure loss generated in the first piping portion and the second piping portion.
  • the length of the reduced diameter portion exceeds 15 mm, the pressure loss increases and the efficiency decreases.
  • the silencer according to the second aspect of the present invention has a cylindrical shape that is long in the axial direction, and a main body that is disposed substantially parallel to the vertical direction during installation, and the main body that is positioned above during installation.
  • the first piping part that is penetrated and connected at the axial end on one side of the part and the tip is disposed inside the main body part, and opposite to the one side of the main body part that is positioned below during installation
  • a second pipe part connected to the other axial end part and having a tip disposed inside the main body part, wherein one of the first pipe part and the second pipe part is the main body
  • the diameter of the tip located inside the main body is smaller than the diameter of the connecting portion with the part, and the length of the reduced diameter portion having a small diameter in the first pipe part or the second pipe part is 15 mm from the tip. It is as follows.
  • the 1st piping part is penetrated and connected in the axial direction edge part of the one side of the main-body part which has a cylindrical shape long in an axial direction, and a 2nd piping part is the axis
  • the first pipe part and the second pipe part are both connected through at the end in the direction, and the distal ends of the first pipe part and the second pipe part are arranged inside the main body part.
  • either one of the 1st piping part and the 2nd piping part reduces noise more effectively because the diameter of the tip located inside the body part is smaller than the diameter of the connection part with the body part. be able to.
  • a through hole is formed in a tube wall of the second pipe part, and a length from the tip of the second pipe part to the through hole is 1 of a length of the main body part.
  • the position may be / 8 times or more and 2 mm or more above the connection portion between the second pipe part and the main body part.
  • the oil stored in the main body portion is returned to the second pipe through the through hole formed in the pipe wall of the second pipe. Moreover, since the length from the front-end
  • the through-hole formed in the second pipe portion has a refrigerant flow in which separation occurs due to a step portion at a boundary between a reduced diameter portion having a small diameter and an enlarged diameter portion having an enlarged diameter. May be formed in a portion reattached to the tube wall of the second piping portion.
  • the axial length from the stepped portion to the through hole may be 6 ⁇ or more.
  • An air conditioner according to a third aspect of the present invention includes a refrigerant circuit in which the silencer according to the first or second aspect is installed.
  • noise can be efficiently reduced with a simple configuration.
  • An air conditioner according to an embodiment of the present invention includes an outdoor unit and an indoor unit connected by a refrigerant pipe.
  • the refrigerant piping of the refrigerant circuit is provided with a compressor, a four-way valve, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger.
  • the four-way valve is switched, and the refrigerant in the refrigerant circuit circulates in the order of the compressor, the indoor heat exchanger, the expansion valve, the outdoor heat exchanger, and the compressor.
  • the indoor heat exchanger functions as a condenser
  • the outdoor heat exchanger functions as an evaporator.
  • the four-way valve is switched, and the refrigerant in the refrigerant circuit circulates in the order of the compressor, the outdoor heat exchanger, the expansion valve, the indoor heat exchanger, and the compressor.
  • the outdoor heat exchanger functions as a condenser
  • the indoor heat exchanger functions as an evaporator.
  • a muffler 1 as shown in FIGS. 1 and 2 is installed near the discharge port of the compressor, on the downstream side of the discharge port of the compressor.
  • the muffler 1 is installed between the compressor and the four-way valve in the refrigerant circuit, and is arranged inside the outdoor unit.
  • the muffler 1 has a configuration that reduces noise caused by pulsation generated in the compressor.
  • the muffler 1 is connected to, for example, a cylindrical main body 2, an inlet pipe 3 connected to one end 2 a of the main body 2, and the other end 2 b of the main body 2, as shown in FIGS. 1 and 2.
  • the outlet pipe 4 is provided.
  • One end 2 a of the main body 2 is an axial end on one side of the main body 2, and the other end 2 b of the main body 2 is on the other axial end opposite to the one end 2 a of the main body 2.
  • the main body 2 is disposed such that the axial direction is substantially parallel to the vertical direction, and one end 2a of the main body 2 is located above the main body 2.
  • the other end 2b is located below.
  • the refrigerant is introduced from the inlet pipe 3 connected to the upper side, and the refrigerant is discharged from the outlet pipe 4 connected to the lower side.
  • Both the inlet pipe 3 and the outlet pipe 4 are part of the refrigerant pipe constituting the refrigerant circuit.
  • the present invention is not limited to the example in which the inlet pipe 3 is arranged above the main body 2 and the outlet pipe 4 is installed below. On the contrary, the inlet pipe 3 is installed below the main body 2 and the outlet The pipe 4 may be installed upward. In this case, in the muffler 1, the refrigerant is introduced from the inlet pipe 3 connected downward, and the refrigerant is discharged from the outlet pipe 4 connected upward.
  • the main body 2 may have a conical shape as shown in FIG. 1 on the one end 2a side and the other end 2b side, or may have another shape, for example, a hemispherical shape. Moreover, the main-body part 2 may have a disk surface parallel to a horizontal surface as shown in FIG. 2 in the one end part 2a side and the other end part 2b side. The inside of the main body 2 is hollow.
  • the inlet pipe 3 is connected to one end 2 a of the main body 2 while penetrating at the one end 2 a of the main body 2, and the tip 3 a of the inlet pipe 3 is disposed inside the main body 2.
  • the outlet pipe 4 is connected to the other end 2 b of the main body 2 while passing through the other end 2 b of the main body 2, and the tip 4 a of the outlet pipe 4 is disposed inside the main body 2. .
  • the diameter of the pipe 3 is smaller than the diameter of the connection portion between the inlet pipe 3 or the outlet pipe 4 and the main body 2 on the tip 3 a side of the inlet pipe 3 and the tip 4 a side of the outlet pipe 4.
  • Portions 5 and 6 are formed.
  • the reduced diameter portions 5 and 6 are formed by, for example, pressing, and have a cylindrical shape with a constant diameter along the tube axis direction of the inlet pipe 3 or the outlet pipe 4, for example.
  • the boundary between the diameter-reduced portion 5 and the diameter-expanded portion 7 other than the diameter-reduced portion 5 is formed inside the inlet pipe 3 and the outlet pipe 4.
  • a step is formed at the boundary between the reduced diameter portion 6 and the enlarged diameter portion 8 which is a portion other than the reduced diameter portion 6.
  • the inlet pipe 3 and the outlet pipe 4 are smaller in diameter at the tips 3a and 4a located inside the main body 2 than the diameter of the connection portion with the main body 2 (the inner diameter of the main body 2 of the muffler 1).
  • the ratio of / (the inner diameter of the tip 3a of the inlet pipe 3 or the tip 4a of the outlet pipe 4) is increased, and noise can be reduced more effectively.
  • the tips 3a and 4a are arranged inside the main body 2, only one of the tips 3a and 4a of the inlet pipe 3 and the outlet pipe 4 is arranged inside. Compared with the case where it is done, the noise reduction effect is high.
  • the reduced diameter portions 5 and 6 may be formed by closing as shown in FIG. 3, and may have a shape in which the tips 3a and 4a of the inlet pipe 3 or the outlet pipe 4 are bent inward. .
  • the reduced diameter portions 5 and 6 are not limited to the cylindrical shape, and may be formed in a conical shape (tapered shape) as shown in FIG.
  • the outer diameter of the pipe connected to the main body 2 is equal to the outer diameter of the pipe located outside the main body 2. Therefore, the shape of the connecting portion in the main body 2 is such that the inlet pipe 3 and the outlet pipe 4 located outside the main body 2 regardless of whether the diameters of the tips 3a and 4a located inside the main body 2 are small. It is determined by the diameter. Therefore, the main body 2 of the muffler 1 according to the present embodiment is connected to other straight refrigerant pipes in which the diameters of the tips 3a and 4a are not small, that is, straight refrigerant pipes in which the reduced diameter parts 5 and 6 are not formed. It can also be used for the main body of the muffler of the aspect. Therefore, the main body 2 of the muffler 1 according to the present embodiment can be shared with the main body of the muffler of another aspect, and the manufacturing cost can be reduced.
  • the length of the reduced diameter portions 5 and 6 is 15 mm or less. Thereby, the pressure loss which arises in the inlet piping 3 and the outlet piping 4 can be reduced. On the other hand, when the length of the reduced diameter portions 5 and 6 exceeds 15 mm, the pressure loss increases and the efficiency decreases. Further, since the length of the region where the reduced diameter portions 5 and 6 are formed is relatively short, the processing is easy.
  • the tip 3a of the inlet pipe 3 is connected to the inlet pipe 3 from the tip 3a of the inlet pipe 3.
  • 3 is provided at a position where the length to the connecting portion between the main body 2 and the main body 2 is 1 / 2L.
  • the tip 4a of the outlet pipe 4 is provided so that the length from the tip 4a of the outlet pipe 4 to the connection portion between the outlet pipe 4 and the main body 2 is 1 / 4L.
  • a through hole 9 is formed in the tube wall of the outlet pipe 4.
  • oil stored in the main body portion 2 flows and is returned to the inside of the outlet pipe 4.
  • the returned oil is circulated through the refrigerant circuit together with the refrigerant and other oils, and is used for lubricating the compressor.
  • the length from the tip 4a of the outlet pipe 4 to the through hole 9 is a position that is at least 1/8 times the length of the main body 2 and 2 mm or more than the connecting portion between the outlet pipe 4 and the main body 2 It is good that it is an upper position.
  • the length from the tip 4a of the outlet pipe 4 to the through hole 9 is at a position that is 1/8 or more times the length of the main body 2, the amount of oil pool can be reduced as much as possible. Furthermore, since the through hole 9 is formed at a position 2 mm or more higher than the connection portion between the outlet pipe 4 and the main body portion 2, the connection portion between the main body portion 2 and the outlet pipe 4 is brazed. In this case, the through hole 9 is not clogged by the wax. These values are examples, and the through hole 9 of the outlet pipe 4 may be provided at another position (height).
  • the through-hole 9 formed in the outlet pipe 4 causes the refrigerant flow separated by the stepped portion at the boundary between the reduced diameter part 6 and the enlarged diameter part 8 to re-appear on the pipe wall of the outlet pipe 4. It is good to form downstream from the adhered part.
  • the axial length L 1 from the stepped portion to the through hole 9 is , 6 ⁇ or more. This is because when the length of the step portion in the direction perpendicular to the airflow direction is ⁇ , the airflow reattaches to the tube wall at a position of 6 ⁇ or more along the airflow direction from the step portion, and the airflow is rectified. This is based on the knowledge that This value varies depending on the Reynolds number. In the present invention, the position where the through hole 9 is provided is not limited to this value.
  • the reduced diameter portions 5 and 6 are formed in both the inlet pipe 3 and the outlet pipe 4
  • the present invention is not limited to this example.
  • the reduced diameter portion 5 may be formed only on the distal end 3a side of the inlet pipe 3, or as shown in FIG. 7, the reduced diameter portion 6 is formed only on the distal end 4a side of the outlet pipe 4. May be formed. 6 and 7, when the reduced diameter portions 5 and 6 have a cylindrical shape, the length of the reduced diameter portions 5 and 6 is 15 mm or less. Thereby, the pressure loss which arises in the inlet piping 3 and the outlet piping 4 can be reduced.
  • the through hole 9 is formed in the tube wall of the outlet pipe 4 as in the above-described embodiment.
  • Muffler 2 Main-body part 2a: One end part 2b: Other end part 3: Inlet piping 3a: Tip 4: Outlet pipe 4a: Tip 5: Reduced diameter part 6: Reduced diameter part 7: Expanded diameter part 8: Expanded diameter part 9: Through hole

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Acoustics & Sound (AREA)
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Abstract

The purpose of the present invention is to provide: a muffler which is capable of efficiently reducing noise with a simple configuration; and an air conditioner. The muffler (1) is provided with: a main body (2) which has a cylindrical shape that is long in the axial direction, the axial direction of said main body being arranged substantially parallel to the vertical direction during installation; an inlet pipe (3a) which passes through and is connected to an end of the main body (2) at one side in the axial direction, said end being positioned upwards during installation, and which has the tip end (3a) disposed inside the main body (2); and an outlet pipe (4) which is connected to an end of the main body (2) at another side in the axial direction opposite to the one side, said end being positioned downwards during installation, and which has the tip end (4a) disposed inside the main body (2). The diameters of the tip ends (3a, 4a) of the inlet pipe (3) and the outlet pipe (4) which are positioned inside the main body (2) are smaller than the diameters of parts which are connected to the main body (2).

Description

消音器及び空気調和機Silencer and air conditioner
　本発明は、消音器及び空気調和機に関するものである。 The present invention relates to a silencer and an air conditioner.
　空気調和機の冷媒回路には、圧縮機、凝縮器、膨張弁及び蒸発器などが設けられる。圧縮機は、冷媒を吸入し、吸入した冷媒を圧縮して、更に吐出する。圧縮機における冷媒の吸入、圧縮及び吐出は、繰り返し行われることから、圧縮機において脈動が生じ、脈動は騒音の発生源となっている。そこで、冷媒回路の配管に消音器（マフラ）が設置され、脈動による騒音の低減が図られている。マフラは、圧縮機の吐出口と凝縮器の間の配管において、吐出口の近傍に設置される。 Compressor, condenser, expansion valve, evaporator, etc. are provided in the refrigerant circuit of the air conditioner. The compressor sucks the refrigerant, compresses the sucked refrigerant, and discharges it further. Since the suction, compression, and discharge of the refrigerant in the compressor are repeatedly performed, pulsation occurs in the compressor, and the pulsation is a generation source of noise. Therefore, a silencer (muffler) is installed in the piping of the refrigerant circuit to reduce noise due to pulsation. The muffler is installed in the vicinity of the discharge port in the pipe between the discharge port of the compressor and the condenser.
　下記の特許文献１では、空気調和機の冷凍サイクルに設けられるマフラについて、マフラ本体の入口側と出口側にそれぞれ接続配管が接続されており、入口側に接続された接続配管の先端部がマフラ本体の内部、かつ、マフラ本体の長手方向の中心面の近傍に位置するまで挿入されることが開示されている。 In Patent Document 1 below, for a muffler provided in a refrigeration cycle of an air conditioner, connection pipes are connected to the inlet side and the outlet side of the muffler body, respectively, and the tip of the connection pipe connected to the inlet side is the muffler. It is disclosed that it is inserted until it is located inside the main body and in the vicinity of the center plane in the longitudinal direction of the muffler main body.
特開２０１１－１２８６９号公報JP2011-12869A
　マフラは、マフラ本体の内径と、マフラ本体の入口又は出口に接続される配管の内径との関係である（マフラ本体内径）／（配管内径）が大きいほど、マフラによる騒音低減効果が高まる。この係数（（マフラ本体内径）／（配管内径））を大きくするためには、マフラ本体内径を大きくするか、配管内径を小さくする必要がある。しかし、マフラ本体の内径を大きくすると、マフラ本体のサイズが大きくなり、コストが上昇するだけでなく、マフラの設置スペースがより広く必要になり、機器類の省スペース化を図ることができない。また、マフラに接続される配管の内径を小さくすると、配管内部で生じる圧力損失が増加するという問題がある。 The muffler has a relationship between the inner diameter of the muffler main body and the inner diameter of the pipe connected to the inlet or outlet of the muffler main body, and the noise reduction effect by the muffler increases as the muffler main body inner diameter / (pipe inner diameter) increases. In order to increase this coefficient ((muffler main body inner diameter) / (piping inner diameter)), it is necessary to increase the muffler main body inner diameter or reduce the pipe inner diameter. However, if the inner diameter of the muffler main body is increased, the size of the muffler main body is increased and the cost is increased. In addition, a larger installation space for the muffler is required, and it is not possible to save space for the devices. In addition, when the inner diameter of the pipe connected to the muffler is reduced, there is a problem that the pressure loss generated inside the pipe increases.
　本発明は、このような事情に鑑みてなされたものであって、簡素な構成で騒音を効率的に低減することが可能な消音器及び空気調和機を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object thereof is to provide a silencer and an air conditioner capable of efficiently reducing noise with a simple configuration.
　本発明の第１態様に係る消音器は、軸方向に長い筒形状を有し、設置時に軸方向が鉛直方向に対してほぼ平行に配置される本体部と、設置時に上方に位置する前記本体部の一側の軸方向端部において貫通して接続され、先端が前記本体部の内部に配置された第１配管部と、設置時に下方に位置する、前記本体部の前記一側とは反対の他側の軸方向端部に接続され、先端が前記本体部の内部に配置された第２配管部とを備え、前記第１配管部及び前記第２配管部は、前記本体部との接続部分の径よりも前記本体部の内部に位置する先端の径が小さい。 The silencer according to the first aspect of the present invention has a cylindrical shape that is long in the axial direction, and a main body that is disposed substantially parallel to the vertical direction during installation, and the main body that is positioned above during installation. The first piping part that is penetrated and connected at the axial end on one side of the part and the tip is disposed inside the main body part, and opposite to the one side of the main body part that is positioned below during installation A second pipe part connected to the other axial end part and having a tip disposed inside the main body part, wherein the first pipe part and the second pipe part are connected to the main body part. The diameter of the tip located inside the main body is smaller than the diameter of the portion.
　この構成によれば、第１配管部は、軸方向に長い筒形状を有する本体部の一側の軸方向端部において貫通して接続され、第２配管部は、本体部の他側の軸方向端部において貫通して接続され、第１配管部と第２配管部のいずれも、先端が本体部の内部に配置されている。そして、第１配管部と第２配管部は、本体部との接続部分の径よりも、本体部の内部に位置する先端の径が小さいため、騒音をより効果的に低減することができる。また、第１配管部と第２配管部の両方において、先端が本体部の内部に配置されているため、第１配管部と第２配管部の一方の先端のみが、内部に配置される場合に比べて、騒音の低減効果が高い。 According to this structure, the 1st piping part is penetrated and connected in the axial direction edge part of the one side of the main-body part which has a cylindrical shape long in an axial direction, and a 2nd piping part is the axis | shaft of the other side of a main-body part. The first pipe part and the second pipe part are both connected through at the end in the direction, and the distal ends of the first pipe part and the second pipe part are arranged inside the main body part. And since the diameter of the front-end | tip located inside a main-body part is smaller than the diameter of the connection part with a main-body part, a 1st piping part and a 2nd piping part can reduce noise more effectively. Moreover, in both the 1st piping part and the 2nd piping part, since the front-end | tip is arrange | positioned inside a main-body part, when only one front-end | tip of a 1st piping part and a 2nd piping part is arrange | positioned inside Compared with, noise reduction effect is high.
　上記第１態様において、前記第１配管部及び前記第２配管部は、前記本体部との接続部分の径と、前記本体部の外側に位置する部分の径とが等しくてもよい。 In the first aspect, the first piping portion and the second piping portion may have the same diameter at the connection portion with the main body portion and the diameter at the portion located outside the main body portion.
　この構成によれば、第１配管部又は第２配管部と本体部との接続部分の径は、本体部の外側に位置する第１配管部及び第２配管部の径と等しいため、本体部における接続部分の形状は、本体部の内部に位置する先端の径が小さいか否かに関わらず、本体部の外側に位置する第１配管部及び第２配管部の径によって決定される。したがって、本態様の本体部は、本体部の内部に位置する先端の径が小さくない配管が接続される他の態様の消音器との共有化を図ることができる。 According to this configuration, since the diameter of the connection portion between the first piping part or the second piping part and the main body part is equal to the diameters of the first piping part and the second piping part located outside the main body part, the main body part The shape of the connecting portion is determined by the diameters of the first and second piping parts located outside the main body part, regardless of whether the diameter of the tip located inside the main body part is small. Therefore, the main body part of this aspect can be shared with the silencer of another aspect to which a pipe having a small tip diameter located inside the main body part is connected.
　上記第１態様において、前記第１配管部及び前記第２配管部において径が小さい縮径部分の長さは、前記先端から１５ｍｍ以下でもよい。 In the first aspect, the length of the reduced diameter portion having a small diameter in the first piping portion and the second piping portion may be 15 mm or less from the tip.
　この構成によれば、縮径部分の長さが１５ｍｍ以下であるため、第１配管部及び第２配管部において生じる圧力損失を低減できる。一方、縮径部分の長さが１５ｍｍを超えると圧力損失が上昇し、効率が低下する。 According to this configuration, since the length of the reduced diameter portion is 15 mm or less, it is possible to reduce the pressure loss generated in the first piping portion and the second piping portion. On the other hand, when the length of the reduced diameter portion exceeds 15 mm, the pressure loss increases and the efficiency decreases.
　本発明の第２態様に係る消音器は、軸方向に長い筒形状を有し、設置時に軸方向が鉛直方向に対してほぼ平行に配置される本体部と、設置時に上方に位置する前記本体部の一側の軸方向端部において貫通して接続され、先端が前記本体部の内部に配置された第１配管部と、設置時に下方に位置する、前記本体部の前記一側とは反対の他側の軸方向端部に接続され、先端が前記本体部の内部に配置された第２配管部とを備え、前記第１配管部及び前記第２配管部のいずれか一方は、前記本体部との接続部分の径よりも前記本体部の内部に位置する先端の径が小さく、前記第１配管部又は前記第２配管部において径が小さい縮径部分の長さは、前記先端から１５ｍｍ以下である。 The silencer according to the second aspect of the present invention has a cylindrical shape that is long in the axial direction, and a main body that is disposed substantially parallel to the vertical direction during installation, and the main body that is positioned above during installation. The first piping part that is penetrated and connected at the axial end on one side of the part and the tip is disposed inside the main body part, and opposite to the one side of the main body part that is positioned below during installation A second pipe part connected to the other axial end part and having a tip disposed inside the main body part, wherein one of the first pipe part and the second pipe part is the main body The diameter of the tip located inside the main body is smaller than the diameter of the connecting portion with the part, and the length of the reduced diameter portion having a small diameter in the first pipe part or the second pipe part is 15 mm from the tip. It is as follows.
　この構成によれば、第１配管部は、軸方向に長い筒形状を有する本体部の一側の軸方向端部において貫通して接続され、第２配管部は、本体部の他側の軸方向端部において貫通して接続され、第１配管部と第２配管部のいずれも、先端が本体部の内部に配置されている。そして、第１配管部及び第２配管部のいずれか一方は、本体部との接続部分の径よりも、本体部の内部に位置する先端の径が小さいため、騒音をより効果的に低減することができる。また、第１配管部と第２配管部の両方において、先端が本体部の内部に配置されているため、第１配管部と第２配管部の一方の先端のみが、内部に配置される場合に比べて、騒音の低減効果が高い。
　また、縮径部分の長さが１５ｍｍ以下であるため、第１配管部又は第２配管部において生じる圧力損失を低減できる。一方、縮径部分の長さが１５ｍｍを超えると圧力損失が上昇し、効率が低下する。 According to this structure, the 1st piping part is penetrated and connected in the axial direction edge part of the one side of the main-body part which has a cylindrical shape long in an axial direction, and a 2nd piping part is the axis | shaft of the other side of a main-body part. The first pipe part and the second pipe part are both connected through at the end in the direction, and the distal ends of the first pipe part and the second pipe part are arranged inside the main body part. And either one of the 1st piping part and the 2nd piping part reduces noise more effectively because the diameter of the tip located inside the body part is smaller than the diameter of the connection part with the body part. be able to. Moreover, in both the 1st piping part and the 2nd piping part, since the front-end | tip is arrange | positioned inside a main-body part, when only one front-end | tip of a 1st piping part and a 2nd piping part is arrange | positioned inside Compared with, noise reduction effect is high.
Moreover, since the length of the reduced diameter portion is 15 mm or less, the pressure loss generated in the first piping portion or the second piping portion can be reduced. On the other hand, when the length of the reduced diameter portion exceeds 15 mm, the pressure loss increases and the efficiency decreases.
　上記第１及び第２態様において、前記第２配管部の管壁に貫通孔が形成され、前記第２配管部の前記先端から前記貫通孔までの長さは、前記本体部の長さの１／８倍以上の位置であり、かつ、前記第２配管部と前記本体部との接続部分よりも２ｍｍ以上上方の位置でもよい。 In the first and second aspects, a through hole is formed in a tube wall of the second pipe part, and a length from the tip of the second pipe part to the through hole is 1 of a length of the main body part. The position may be / 8 times or more and 2 mm or more above the connection portion between the second pipe part and the main body part.
　この構成によれば、第２配管の管壁に形成された貫通孔を介して、本体部に貯留した油が第２配管へ戻される。また、第２配管の先端から貫通孔までの長さが、本体部の長さの１／８倍以上の位置にあることから、油溜まり量を極力低減できる。さらに、貫通孔は、第２配管と前記本体部との接続部分よりも２ｍｍ以上上方の位置に形成されることから、本体部と第２配管との接続部分にろう付けが施された場合に、ろうによって目詰まりすることがない。 According to this configuration, the oil stored in the main body portion is returned to the second pipe through the through hole formed in the pipe wall of the second pipe. Moreover, since the length from the front-end | tip of a 2nd piping to a through-hole exists in the position more than 1/8 times the length of a main-body part, the amount of oil sumps can be reduced as much as possible. Furthermore, since the through hole is formed at a position 2 mm or more above the connecting portion between the second pipe and the main body, when the connecting portion between the main body and the second pipe is brazed. No clogging due to wax.
　上記第１及び第２態様において、前記第２配管部に形成された前記貫通孔は、径が小さい縮径部分と径が拡大した拡径部分との境界の段差部によって剥離が生じた冷媒流れが前記第２配管部の管壁に再付着した部分に形成されてもよい。 In the first and second aspects, the through-hole formed in the second pipe portion has a refrigerant flow in which separation occurs due to a step portion at a boundary between a reduced diameter portion having a small diameter and an enlarged diameter portion having an enlarged diameter. May be formed in a portion reattached to the tube wall of the second piping portion.
　この構成によれば、縮径部分と拡径部分との境界の段差部によって剥離が生じ、冷媒流れが乱れた後、冷媒流れが管壁に再付着した部分に貫通孔が形成されることから、整流した領域において油が第２配管内へ吸い込まれて、効率良く第２配管内へ戻される。 According to this configuration, separation occurs due to a step portion at the boundary between the reduced diameter portion and the enlarged diameter portion, and after the refrigerant flow is disturbed, a through hole is formed in a portion where the refrigerant flow is reattached to the tube wall. In the rectified region, the oil is sucked into the second pipe and efficiently returned into the second pipe.
　上記第１及び第２態様において、前記縮径部分と前記拡径部分との境界の前記段差部の径方向の長さがσであるとき、前記段差部から前記貫通孔までの軸方向の長さは、６σ以上でもよい。 In the first and second aspects, when the radial length of the stepped portion at the boundary between the reduced diameter portion and the enlarged diameter portion is σ, the axial length from the stepped portion to the through hole The thickness may be 6σ or more.
　本発明の第３態様に係る空気調和機は、上記第１又は第２態様の消音器が設置された冷媒回路を備える。 An air conditioner according to a third aspect of the present invention includes a refrigerant circuit in which the silencer according to the first or second aspect is installed.
　本発明によれば、簡素な構成で騒音を効率的に低減することができる。 According to the present invention, noise can be efficiently reduced with a simple configuration.
本発明の一実施形態に係るマフラを示す縦断面図である。It is a longitudinal cross-sectional view which shows the muffler which concerns on one Embodiment of this invention. 本発明の一実施形態に係るマフラの第１変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st modification of the muffler which concerns on one Embodiment of this invention. 本発明の一実施形態に係るマフラの入口配管又は出口配管の第１変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st modification of the inlet piping or outlet piping of the muffler which concerns on one Embodiment of this invention. 本発明の一実施形態に係るマフラの入口配管又は出口配管の第２変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the 2nd modification of the inlet piping or outlet piping of the muffler which concerns on one Embodiment of this invention. 本発明の一実施形態に係るマフラの出口配管を示す部分拡大縦断面図である。It is a partial expanded longitudinal cross-sectional view which shows the exit piping of the muffler which concerns on one Embodiment of this invention. 本発明の一実施形態に係るマフラの第２変形例を示す縦断面図である。It is a longitudinal section showing the 2nd modification of a muffler concerning one embodiment of the present invention. 本発明の一実施形態に係るマフラの第３変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the 3rd modification of the muffler which concerns on one Embodiment of this invention.
　以下に、本発明の一実施形態に係る空気調和機について、図面を参照して説明する。
　本発明の一実施形態に係る空気調和機は、冷媒配管によって接続された室外機と室内機を備える。冷媒回路の冷媒配管には、圧縮機、四方弁、室内熱交換器、膨張弁及び室外熱交換器が設けられる。暖房運転時には、四方弁が切り替えられて、冷媒回路内の冷媒は、圧縮機、室内熱交換器、膨張弁、室外熱交換器、圧縮機の順に循環する。暖房運転時、室内熱交換器は、凝縮器として機能し、室外熱交換器は、蒸発器として機能する。また、冷房運転時には、四方弁が切り替えられて、冷媒回路内の冷媒は、圧縮機、室外熱交換器、膨張弁、室内熱交換器、圧縮機の順に循環する。冷房運転時、室外熱交換器は、凝縮器として機能し、室内熱交換器は、蒸発器として機能する。 Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the drawings.
An air conditioner according to an embodiment of the present invention includes an outdoor unit and an indoor unit connected by a refrigerant pipe. The refrigerant piping of the refrigerant circuit is provided with a compressor, a four-way valve, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger. During the heating operation, the four-way valve is switched, and the refrigerant in the refrigerant circuit circulates in the order of the compressor, the indoor heat exchanger, the expansion valve, the outdoor heat exchanger, and the compressor. During the heating operation, the indoor heat exchanger functions as a condenser, and the outdoor heat exchanger functions as an evaporator. In the cooling operation, the four-way valve is switched, and the refrigerant in the refrigerant circuit circulates in the order of the compressor, the outdoor heat exchanger, the expansion valve, the indoor heat exchanger, and the compressor. During the cooling operation, the outdoor heat exchanger functions as a condenser, and the indoor heat exchanger functions as an evaporator.
　冷媒回路の冷媒配管には、圧縮機の吐出口よりも下流側において、圧縮機の吐出口近傍に、図１及び図２に示すような、マフラ１が設置される。マフラ１は、冷媒回路において、圧縮機と四方弁の間に設置され、室外機の内部に配置される。マフラ１は、圧縮機において生じる脈動による騒音を低減する構成を有している。 In the refrigerant piping of the refrigerant circuit, a muffler 1 as shown in FIGS. 1 and 2 is installed near the discharge port of the compressor, on the downstream side of the discharge port of the compressor. The muffler 1 is installed between the compressor and the four-way valve in the refrigerant circuit, and is arranged inside the outdoor unit. The muffler 1 has a configuration that reduces noise caused by pulsation generated in the compressor.
　マフラ１は、図１及び図２に示すように、例えば、円筒形状の本体部２と、本体部２の一端部２ａに接続される入口配管３と、本体部２の他端部２ｂに接続される出口配管４を備える。本体部２の一端部２ａは、本体部２の一側の軸方向端部であり、本体部２の他端部２ｂは、本体部２の一端部２ａとは反対の他側の軸方向端部である。マフラ１が室外機に設置されるとき、本体部２は、軸方向が鉛直方向に対して略平行になるように配置され、本体部２の一端部２ａは、上方に位置し、本体部２の他端部２ｂは、下方に位置する。 The muffler 1 is connected to, for example, a cylindrical main body 2, an inlet pipe 3 connected to one end 2 a of the main body 2, and the other end 2 b of the main body 2, as shown in FIGS. 1 and 2. The outlet pipe 4 is provided. One end 2 a of the main body 2 is an axial end on one side of the main body 2, and the other end 2 b of the main body 2 is on the other axial end opposite to the one end 2 a of the main body 2. Part. When the muffler 1 is installed in the outdoor unit, the main body 2 is disposed such that the axial direction is substantially parallel to the vertical direction, and one end 2a of the main body 2 is located above the main body 2. The other end 2b is located below.
　これにより、マフラ１では、上方に接続された入口配管３から冷媒が導入されて、下方に接続された出口配管４から冷媒が排出される。入口配管３と出口配管４のいずれも冷媒回路を構成する冷媒配管の一部である。なお、本発明は、入口配管３が本体部２の上方に配置され、出口配管４が下方に設置される例に限定されず、反対に入口配管３が本体部２の下方に設置され、出口配管４が上方に設置されてよい。この場合、マフラ１では、下方に接続された入口配管３から冷媒が導入されて、上方に接続された出口配管４から冷媒が排出される。 Thereby, in the muffler 1, the refrigerant is introduced from the inlet pipe 3 connected to the upper side, and the refrigerant is discharged from the outlet pipe 4 connected to the lower side. Both the inlet pipe 3 and the outlet pipe 4 are part of the refrigerant pipe constituting the refrigerant circuit. The present invention is not limited to the example in which the inlet pipe 3 is arranged above the main body 2 and the outlet pipe 4 is installed below. On the contrary, the inlet pipe 3 is installed below the main body 2 and the outlet The pipe 4 may be installed upward. In this case, in the muffler 1, the refrigerant is introduced from the inlet pipe 3 connected downward, and the refrigerant is discharged from the outlet pipe 4 connected upward.
　本体部２は、一端部２ａ側及び他端部２ｂ側において、図１に示すように、円錐形状を有してもよいし、他の形状、例えば半球形状を有してもよい。また、本体部２は、一端部２ａ側及び他端部２ｂ側において、図２に示すように、水平面に対して平行な円板面を有してもよい。本体部２の内部は、中空である。 The main body 2 may have a conical shape as shown in FIG. 1 on the one end 2a side and the other end 2b side, or may have another shape, for example, a hemispherical shape. Moreover, the main-body part 2 may have a disk surface parallel to a horizontal surface as shown in FIG. 2 in the one end part 2a side and the other end part 2b side. The inside of the main body 2 is hollow.
　入口配管３は、本体部２の一端部２ａにおいて貫通しつつ、本体部２の一端部２ａと接続されており、入口配管３の先端３ａが本体部２の内部に配置される。また、出口配管４は、本体部２の他端部２ｂにおいて貫通しつつ、本体部２の他端部２ｂと接続されており、出口配管４の先端４ａが本体部２の内部に配置される。 The inlet pipe 3 is connected to one end 2 a of the main body 2 while penetrating at the one end 2 a of the main body 2, and the tip 3 a of the inlet pipe 3 is disposed inside the main body 2. The outlet pipe 4 is connected to the other end 2 b of the main body 2 while passing through the other end 2 b of the main body 2, and the tip 4 a of the outlet pipe 4 is disposed inside the main body 2. .
　本体部２の内部において、入口配管３の先端３ａ側と出口配管４の先端４ａ側には、入口配管３又は出口配管４と本体部２との接続部分の径よりも管径が小さい縮径部５，６が形成されている。縮径部５，６は、例えば、プレス加工によって形成され、例えば、入口配管３又は出口配管４の管軸方向に沿って、直径が一定である円筒形状を有する。円筒形状を有する縮径部５，６が形成される場合、入口配管３及び出口配管４の内部には、縮径部５と縮径部５以外の部分である拡径部７との境界や、縮径部６と縮径部６以外の部分である拡径部８との境界には、段差が形成される。 In the main body 2, the diameter of the pipe 3 is smaller than the diameter of the connection portion between the inlet pipe 3 or the outlet pipe 4 and the main body 2 on the tip 3 a side of the inlet pipe 3 and the tip 4 a side of the outlet pipe 4. Portions 5 and 6 are formed. The reduced diameter portions 5 and 6 are formed by, for example, pressing, and have a cylindrical shape with a constant diameter along the tube axis direction of the inlet pipe 3 or the outlet pipe 4, for example. When the diameter-reduced portions 5 and 6 having a cylindrical shape are formed, the boundary between the diameter-reduced portion 5 and the diameter-expanded portion 7 other than the diameter-reduced portion 5 is formed inside the inlet pipe 3 and the outlet pipe 4. A step is formed at the boundary between the reduced diameter portion 6 and the enlarged diameter portion 8 which is a portion other than the reduced diameter portion 6.
　入口配管３及び出口配管４は、本体部２との接続部分の径よりも、本体部２の内部に位置する先端３ａ，４ａの径が小さいため、（マフラ１の本体部２が有する内径）／（入口配管３の先端３ａ又は出口配管４の先端４ａが有する内径）の比率が大きくなり、騒音をより効果的に低減することができる。また、入口配管３及び出口配管４の両方において、先端３ａ，４ａが本体部２の内部に配置されているため、入口配管３及び出口配管４の一方の先端３ａ，４ａのみが、内部に配置される場合に比べて、騒音の低減効果が高い。 The inlet pipe 3 and the outlet pipe 4 are smaller in diameter at the tips 3a and 4a located inside the main body 2 than the diameter of the connection portion with the main body 2 (the inner diameter of the main body 2 of the muffler 1). The ratio of / (the inner diameter of the tip 3a of the inlet pipe 3 or the tip 4a of the outlet pipe 4) is increased, and noise can be reduced more effectively. Moreover, in both the inlet pipe 3 and the outlet pipe 4, since the tips 3a and 4a are arranged inside the main body 2, only one of the tips 3a and 4a of the inlet pipe 3 and the outlet pipe 4 is arranged inside. Compared with the case where it is done, the noise reduction effect is high.
　なお、縮径部５，６は、図３に示すように、クロージング加工によって形成されてもよく、入口配管３又は出口配管４の先端３ａ，４ａが内側へ屈曲した形状を有してもよい。また、縮径部５，６は、円筒形状の場合に限られず、図４に示すように、円錐形状（テーパ形状）に形成されてもよい。 The reduced diameter portions 5 and 6 may be formed by closing as shown in FIG. 3, and may have a shape in which the tips 3a and 4a of the inlet pipe 3 or the outlet pipe 4 are bent inward. . The reduced diameter portions 5 and 6 are not limited to the cylindrical shape, and may be formed in a conical shape (tapered shape) as shown in FIG.
　入口配管３及び出口配管４は、本体部２との接続部分の配管外径と、本体部２の外側に位置する配管外径とが等しい。そのため、本体部２における接続部分の形状は、本体部２の内部に位置する先端３ａ，４ａの径が小さいか否かに関わらず、本体部２の外側に位置する入口配管３及び出口配管４の径によって決定される。したがって、本実施形態に係るマフラ１の本体部２は、先端３ａ，４ａの径が小さくないストレートの冷媒配管、すなわち、縮径部５，６が形成されないストレートの冷媒配管が接続される他の態様のマフラの本体部にも使用できる。したがって、本実施形態に係るマフラ１の本体部２は、他の態様のマフラの本体部との共有化を図ることができ、製造コストの低減化を図ることができる。 In the inlet pipe 3 and the outlet pipe 4, the outer diameter of the pipe connected to the main body 2 is equal to the outer diameter of the pipe located outside the main body 2. Therefore, the shape of the connecting portion in the main body 2 is such that the inlet pipe 3 and the outlet pipe 4 located outside the main body 2 regardless of whether the diameters of the tips 3a and 4a located inside the main body 2 are small. It is determined by the diameter. Therefore, the main body 2 of the muffler 1 according to the present embodiment is connected to other straight refrigerant pipes in which the diameters of the tips 3a and 4a are not small, that is, straight refrigerant pipes in which the reduced diameter parts 5 and 6 are not formed. It can also be used for the main body of the muffler of the aspect. Therefore, the main body 2 of the muffler 1 according to the present embodiment can be shared with the main body of the muffler of another aspect, and the manufacturing cost can be reduced.
　縮径部５，６が円筒形状を有する場合、縮径部５，６の長さは、１５ｍｍ以下である。これにより、入口配管３及び出口配管４において生じる圧力損失を低減できる。一方、縮径部５，６の長さが１５ｍｍを超えると圧力損失が上昇し、効率が低下する。また、縮径部５，６が形成される領域の長さが比較的短いため、加工が容易である。 When the reduced diameter portions 5 and 6 have a cylindrical shape, the length of the reduced diameter portions 5 and 6 is 15 mm or less. Thereby, the pressure loss which arises in the inlet piping 3 and the outlet piping 4 can be reduced. On the other hand, when the length of the reduced diameter portions 5 and 6 exceeds 15 mm, the pressure loss increases and the efficiency decreases. Further, since the length of the region where the reduced diameter portions 5 and 6 are formed is relatively short, the processing is easy.
　入口配管３の先端３ａは、マフラ１の本体部２の一端部２ａから他端部２ｂまでの長さがＬであるとき（図１及び図２参照）、入口配管３の先端３ａから入口配管３と本体部２との接続部分までの長さが１／２Ｌとなる位置に設けられる。また、出口配管４の先端４ａは、出口配管４の先端４ａから出口配管４と本体部２との接続部分までの長さが１／４Ｌとなるように設けられる。なお、これらの値は、一例であり、入口配管３及び出口配管４の先端３ａ，４ａは、他の位置（高さ）に設けられてもよい。 When the length from one end 2a to the other end 2b of the main body 2 of the muffler 1 is L (see FIGS. 1 and 2), the tip 3a of the inlet pipe 3 is connected to the inlet pipe 3 from the tip 3a of the inlet pipe 3. 3 is provided at a position where the length to the connecting portion between the main body 2 and the main body 2 is 1 / 2L. The tip 4a of the outlet pipe 4 is provided so that the length from the tip 4a of the outlet pipe 4 to the connection portion between the outlet pipe 4 and the main body 2 is 1 / 4L. These values are only examples, and the tips 3a and 4a of the inlet pipe 3 and the outlet pipe 4 may be provided at other positions (heights).
　図１及び図２に示すように、出口配管４の管壁には、貫通孔９が形成される。貫通孔９は、本体部２に貯留した油が流通し、出口配管４の内部へ戻される。これにより、本体部２の内部に大量の油が貯留することを防止できる。また、戻された油は、冷媒や他の油と共に冷媒回路を再度循環し、圧縮機の潤滑に利用される。 1 and 2, a through hole 9 is formed in the tube wall of the outlet pipe 4. Through the through hole 9, oil stored in the main body portion 2 flows and is returned to the inside of the outlet pipe 4. Thereby, it is possible to prevent a large amount of oil from being stored in the main body 2. In addition, the returned oil is circulated through the refrigerant circuit together with the refrigerant and other oils, and is used for lubricating the compressor.
　出口配管４の先端４ａから貫通孔９までの長さは、本体部２の長さの１／８倍以上の位置であり、かつ、出口配管４と本体部２との接続部分よりも２ｍｍ以上上方の位置であるとよい。 The length from the tip 4a of the outlet pipe 4 to the through hole 9 is a position that is at least 1/8 times the length of the main body 2 and 2 mm or more than the connecting portion between the outlet pipe 4 and the main body 2 It is good that it is an upper position.
　これにより、出口配管４の先端４ａから貫通孔９までの長さが、本体部２の長さの１／８倍以上の位置にあることから、油溜まり量を極力低減できる。さらに、貫通孔９は、出口配管４と本体部２との接続部分よりも２ｍｍ以上上方の位置に形成されることから、本体部２と出口配管４との接続部分にろう付けが施された場合に、貫通孔９がろうによって目詰まりすることがない。なお、これらの値は、一例であり、出口配管４の貫通孔９は、他の位置（高さ）に設けられてもよい。 Thereby, since the length from the tip 4a of the outlet pipe 4 to the through hole 9 is at a position that is 1/8 or more times the length of the main body 2, the amount of oil pool can be reduced as much as possible. Furthermore, since the through hole 9 is formed at a position 2 mm or more higher than the connection portion between the outlet pipe 4 and the main body portion 2, the connection portion between the main body portion 2 and the outlet pipe 4 is brazed. In this case, the through hole 9 is not clogged by the wax. These values are examples, and the through hole 9 of the outlet pipe 4 may be provided at another position (height).
　出口配管４に形成された貫通孔９は、図５に示すように、縮径部６と拡径部８との境界の段差部によって剥離が生じた冷媒流れが出口配管４の管壁に再付着した部分よりも下流側に形成されるとよい。 As shown in FIG. 5, the through-hole 9 formed in the outlet pipe 4 causes the refrigerant flow separated by the stepped portion at the boundary between the reduced diameter part 6 and the enlarged diameter part 8 to re-appear on the pipe wall of the outlet pipe 4. It is good to form downstream from the adhered part.
　出口配管４の内部では、縮径部６と拡径部８との境界の段差部によって剥離が生じ、冷媒流れが乱れる。貫通孔９は、冷媒流れが乱れた後、冷媒流れが管壁に再付着した部分よりも下流側に形成されることから、整流した領域において油が出口配管４内へ吸い込まれる。その結果、本体部２に貯留された油が効率良く出口配管４内へ戻される。 In the outlet pipe 4, separation occurs due to a step portion at the boundary between the reduced diameter portion 6 and the enlarged diameter portion 8, and the refrigerant flow is disturbed. The through hole 9 is formed on the downstream side of the portion where the refrigerant flow is reattached to the pipe wall after the refrigerant flow is disturbed, so that oil is sucked into the outlet pipe 4 in the rectified region. As a result, the oil stored in the main body 2 is efficiently returned into the outlet pipe 4.
　図５に示すように、縮径部６と拡径部８との境界の段差部の径方向の長さがσであるとき、段差部から貫通孔９までの軸方向の長さＬ１は、６σ以上である。
　これは、気流流れ方向に対して垂直方向の段差部の長さがσであるとき、段差部から気流流れ方向に沿って６σ以上の位置では、管壁に気流が再付着し、気流が整流化されるという知見に基づくものである。なお、レイノルズ数によって、この値は変化し、本発明において、貫通孔９が設けられる位置は、この値に限定されるものではない。 As shown in FIG. 5, when the radial length of the stepped portion at the boundary between the reduced diameter portion 6 and the expanded diameter portion 8 is σ, the axial length L 1 from the stepped portion to the through hole 9 is , 6σ or more.
This is because when the length of the step portion in the direction perpendicular to the airflow direction is σ, the airflow reattaches to the tube wall at a position of 6σ or more along the airflow direction from the step portion, and the airflow is rectified. This is based on the knowledge that This value varies depending on the Reynolds number. In the present invention, the position where the through hole 9 is provided is not limited to this value.
　上記実施形態において、入口配管３及び出口配管４の両者に縮径部５，６が形成される場合について説明したが、本発明はこの例に限定されない。例えば、図６に示すように、入口配管３の先端３ａ側のみに縮径部５が形成されてもよいし、図７に示すように、出口配管４の先端４ａ側のみに縮径部６が形成されてもよい。図６及び図７に示すいずれの場合も、縮径部５，６が円筒形状を有する場合、縮径部５，６の長さは、１５ｍｍ以下である。これにより、入口配管３及び出口配管４において生じる圧力損失を低減できる。一方、縮径部５，６の長さが１５ｍｍを超えると圧力損失が上昇し、効率が低下する。また、縮径部５，６が形成される領域の長さが比較的短いため、加工が容易である。図６及び図７に示すいずれの場合も、上述した実施形態と同様に、出口配管４の管壁に貫通孔９が形成される。 In the above embodiment, the case where the reduced diameter portions 5 and 6 are formed in both the inlet pipe 3 and the outlet pipe 4 has been described, but the present invention is not limited to this example. For example, as shown in FIG. 6, the reduced diameter portion 5 may be formed only on the distal end 3a side of the inlet pipe 3, or as shown in FIG. 7, the reduced diameter portion 6 is formed only on the distal end 4a side of the outlet pipe 4. May be formed. 6 and 7, when the reduced diameter portions 5 and 6 have a cylindrical shape, the length of the reduced diameter portions 5 and 6 is 15 mm or less. Thereby, the pressure loss which arises in the inlet piping 3 and the outlet piping 4 can be reduced. On the other hand, when the length of the reduced diameter portions 5 and 6 exceeds 15 mm, the pressure loss increases and the efficiency decreases. Further, since the length of the region where the reduced diameter portions 5 and 6 are formed is relatively short, the processing is easy. 6 and 7, the through hole 9 is formed in the tube wall of the outlet pipe 4 as in the above-described embodiment.
１　　：マフラ
２　　：本体部
２ａ　：一端部
２ｂ　：他端部
３　　：入口配管
３ａ　：先端
４　　：出口配管
４ａ　：先端
５　　：縮径部
６　　：縮径部
７　　：拡径部
８　　：拡径部
９　　：貫通孔
  DESCRIPTION OF SYMBOLS 1: Muffler 2: Main-body part 2a: One end part 2b: Other end part 3: Inlet piping 3a: Tip 4: Outlet pipe 4a: Tip 5: Reduced diameter part 6: Reduced diameter part 7: Expanded diameter part 8: Expanded diameter part 9: Through hole

Claims (8)

  1. 　軸方向に長い筒形状を有し、設置時に軸方向が鉛直方向に対してほぼ平行に配置される本体部と、
    　設置時に上方に位置する前記本体部の一側の軸方向端部において貫通して接続され、先端が前記本体部の内部に配置された第１配管部と、
    　設置時に下方に位置する、前記本体部の前記一側とは反対の他側の軸方向端部に接続され、先端が前記本体部の内部に配置された第２配管部と、
    を備え、
    　前記第１配管部及び前記第２配管部は、前記本体部との接続部分の径よりも前記本体部の内部に位置する先端の径が小さい消音器。     A main body having a long cylindrical shape in the axial direction, the axial direction being arranged substantially parallel to the vertical direction at the time of installation;
    A first piping part that is penetrated and connected at an axial end on one side of the main body located above when installed, and a tip is disposed inside the main body,
    A second piping part, which is located at the time of installation, is connected to an axial end on the other side opposite to the one side of the main body, and has a tip disposed inside the main body;
    With
    The first pipe part and the second pipe part are silencers having a diameter at a tip located inside the main body part smaller than a diameter of a connection part with the main body part.
  2. 　前記第１配管部及び前記第２配管部は、前記本体部との接続部分の径と、前記本体部の外側に位置する部分の径とが等しい請求項１に記載の消音器。 The silencer according to claim 1, wherein the first pipe part and the second pipe part have a diameter of a connection portion with the main body portion and a diameter of a portion located outside the main body portion.
  3. 　前記第１配管部及び前記第２配管部において径が小さい縮径部分の長さは、前記先端から１５ｍｍ以下である請求項１又は２に記載の消音器。 The muffler according to claim 1 or 2, wherein a length of the reduced diameter portion having a small diameter in the first piping portion and the second piping portion is 15 mm or less from the tip.
  4. 　軸方向に長い筒形状を有し、設置時に軸方向が鉛直方向に対してほぼ平行に配置される本体部と、
    　設置時に上方に位置する前記本体部の一側の軸方向端部において貫通して接続され、先端が前記本体部の内部に配置された第１配管部と、
    　設置時に下方に位置する、前記本体部の前記一側とは反対の他側の軸方向端部に接続され、先端が前記本体部の内部に配置された第２配管部と、
    を備え、
    　前記第１配管部及び前記第２配管部のいずれか一方は、前記本体部との接続部分の径よりも前記本体部の内部に位置する先端の径が小さく、
    　前記第１配管部又は前記第２配管部において径が小さい縮径部分の長さは、前記先端から１５ｍｍ以下である消音器。     A main body having a long cylindrical shape in the axial direction, the axial direction being arranged substantially parallel to the vertical direction at the time of installation;
    A first piping part that is penetrated and connected at an axial end on one side of the main body located above when installed, and a tip is disposed inside the main body,
    A second piping part, which is located at the time of installation, is connected to an axial end on the other side opposite to the one side of the main body, and has a tip disposed inside the main body;
    With
    Either one of the first pipe part and the second pipe part has a smaller diameter at the tip located inside the body part than the diameter of the connection part with the body part,
    The length of the reduced diameter portion having a small diameter in the first piping portion or the second piping portion is 15 mm or less from the tip.
  5. 　前記第２配管部の管壁に貫通孔が形成され、
    　前記第２配管部の前記先端から前記貫通孔までの長さは、前記本体部の長さの１／８倍以上の位置であり、かつ、前記第２配管部と前記本体部との接続部分よりも２ｍｍ以上上方の位置である請求項１から４のいずれか１項に記載の消音器。     A through hole is formed in the tube wall of the second piping part,
    The length of the second piping part from the tip to the through hole is a position that is at least 1/8 times the length of the main body part, and a connecting portion between the second piping part and the main body part. The silencer according to any one of claims 1 to 4, wherein the silencer is located at a position 2 mm or more above.
  6. 　前記第２配管部に形成された前記貫通孔は、径が小さい縮径部分と径が拡大した拡径部分との境界の段差部によって剥離が生じた冷媒流れが前記第２配管部の管壁に再付着した部分に形成される請求項５に記載の消音器。 The through-hole formed in the second pipe part is a pipe wall of the second pipe part where the refrigerant flow is peeled off by a step part at the boundary between the reduced diameter part having a small diameter and the enlarged diameter part having an enlarged diameter. The muffler according to claim 5, wherein the silencer is formed at a portion reattached to the surface.
  7. 　前記縮径部分と前記拡径部分との境界の前記段差部の径方向の長さがσであるとき、前記段差部から前記貫通孔までの軸方向の長さは、６σ以上である請求項６に記載の消音器。 The axial length from the step portion to the through hole is 6σ or more when the radial length of the step portion at the boundary between the reduced diameter portion and the enlarged diameter portion is σ. The muffler according to 6.
  8. 　請求項１から７のいずれか１項に記載の消音器が設置された冷媒回路を備える空気調和機。 An air conditioner provided with a refrigerant circuit in which the silencer according to any one of claims 1 to 7 is installed.
PCT/JP2018/003161 2017-03-24 2018-01-31 Muffler, and air conditioner WO2018173492A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038511U (en) * 1973-08-06 1975-04-21
JPS5216005U (en) * 1975-07-24 1977-02-04
JPS5378662U (en) * 1976-12-03 1978-06-30
JPH07159001A (en) * 1993-12-01 1995-06-20 Sanyo Electric Co Ltd Refrigerating machine
JP2011012869A (en) 2009-07-01 2011-01-20 Panasonic Corp Air conditioner
WO2016063705A1 (en) * 2014-10-20 2016-04-28 三菱電機株式会社 Air conditioner muffler and air conditioner equipped with muffler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358237B1 (en) * 2000-07-27 2002-10-25 한국전력공사 Device that absorb sound
BR102012026728A2 (en) * 2012-10-18 2014-08-26 Whirlpool Sa EXPANSION CHAMBER FOR ALTERNATIVE COMPRESSOR UNLOADING LINE
CZ308291B6 (en) * 2014-04-10 2020-04-22 Hanon Systems Damping device and producing it
CN204373104U (en) * 2014-12-09 2015-06-03 广东美的制冷设备有限公司 Muffler and there is its air-conditioner outdoor unit
CN106766083B (en) * 2016-12-06 2019-11-08 青岛海信日立空调系统有限公司 A kind of muffler and the air-conditioning comprising the muffler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038511U (en) * 1973-08-06 1975-04-21
JPS5216005U (en) * 1975-07-24 1977-02-04
JPS5378662U (en) * 1976-12-03 1978-06-30
JPH07159001A (en) * 1993-12-01 1995-06-20 Sanyo Electric Co Ltd Refrigerating machine
JP2011012869A (en) 2009-07-01 2011-01-20 Panasonic Corp Air conditioner
WO2016063705A1 (en) * 2014-10-20 2016-04-28 三菱電機株式会社 Air conditioner muffler and air conditioner equipped with muffler

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