Silencer and air conditioner

Abstract

The application relates to the technical field of air conditioners, and discloses a silencer. The silencer provided by the application comprises a silencer body, a silencing assembly and a baffle. A silencing cavity is arranged in the silencer body, and a notch is formed in the side wall of the silencer body; the silencing assembly comprises a first silencing pipe and a second silencing pipe, which are connected to the two ends of the silencer body respectively, and the cross sections of the first silencing pipe and the second silencing pipe are smaller than the cross section of the silencing cavity; the baffle is used for plugging the notch and is in sliding connection with the inner wall of the silencer body; a first partition plate is fixedly connected with the baffle, and the outer periphery of the first partition plate is attached to the inner wall surface of the silencer body, so that the silencing cavity is divided into a first chamber and a second chamber which are communicated through only the first silencing hole of the first partition plate. The first partition plate which is movable in the silencer body can better determine the frequency and the sound elimination amount which need to be eliminated by the refrigerant circulating system of the air conditioner, so that the problem that the silencer needs to be frequently replaced in the process of optimizing and improving the noise of the air conditioner is solved. The application further discloses an air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, such as a muffler and an air conditioner. Background Technology

[0002] Air conditioner compressors undergo vigorous operation, generating a sharp, unusual noise at a certain frequency. Therefore, silencers are added during air conditioner design to eliminate this noise. An air conditioner silencer is a device that uses principles of sound absorption, reflection, and interference to reduce airflow and liquid flow noise in the outdoor unit's piping. Common air conditioner silencers are cylindrical, centrally located structures connected in series within the outdoor unit's piping. Silencers come in various sizes, differing mainly in length, diameter, cavity volume, and shape. Different sized silencers are suitable for reducing different types of noise and different compressor frequency ranges. Air conditioner refrigerant noise primarily includes refrigerant airflow and liquid flow noise, as well as the sounds of pipe vibration and collision. The noise level is related to the refrigerant quantity, flow rate, pipe diameter, pipe routing, and installation method. The usual solution is to connect an air conditioner silencer in series within the piping.

[0003] In related technologies, silencers are typically produced by first determining the piping scheme, then conducting noise tests on the outdoor unit of the air conditioner to obtain the peak frequency of the abnormal noise. Based on this frequency, sound velocity, and piping specifications, a silencer is selected. Then, a custom-made piping system with a fixed length for the silencer is installed, and noise tests are conducted again. For a single type of air conditioner, multiple silencers need to be tested until the silencer with the best noise reduction effect is selected.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] The single-model air conditioner muffler in the relevant technology can only achieve good noise reduction under fixed operating conditions, and cannot meet the requirements of good noise reduction under all operating conditions. Furthermore, it cannot effectively adjust the air conditioner, increasing the adjustment cost. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a muffler that utilizes a built-in movable first partition to adjust the effective length of the first chamber and the second chamber, thereby better determining the frequency and amount of noise reduction required by the air conditioning refrigerant circulation system, and solving the problem of frequent muffler replacements during the air conditioning noise optimization and improvement process.

[0008] In some embodiments, the muffler includes a muffler body, a muffler assembly, a baffle plate, and a first partition plate. The muffler body has a built-in muffler cavity, and the side wall of the muffler body has a slot. The muffler assembly includes a first muffler tube and a second muffler tube, which are respectively connected to the two ends of the muffler body. The cross-sections of the first and second muffler tubes are smaller than the cross-section of the muffler cavity. The baffle plate blocks the slot and is slidably connected to the inner wall of the muffler body. The first partition plate is fixedly connected to the baffle plate and has a first muffler hole. The outer periphery of the first partition plate is attached to the inner wall surface of the muffler body to divide the muffler cavity into a first chamber and a second chamber that are connected only through the first muffler hole.

[0009] In some alternative embodiments, the muffler further includes an adjustment pin fixed to the baffle plate, the adjustment pin and the first partition plate being fixed to two opposing sidewalls of the baffle plate and located on the same plane perpendicular to the baffle plate.

[0010] In some alternative embodiments, the slot is a straight slide, and scale lines are provided on the side of the straight slide, with the adjustment pin sliding within the straight slide.

[0011] In some alternative embodiments, the muffler further includes multiple positioning protrusions, which are fixed at intervals on the two inner sidewalls of the linear slide, so that the linear slide forms multiple fixing positions for fixing the adjustment pins.

[0012] In some alternative embodiments, the first partition plate is further provided with an exhaust hole located at the bottom end of the first partition plate in the vertical direction.

[0013] In some alternative embodiments, the noise-reducing body includes a first tube and / or a second tube. The first tube is cylindrical and has a hollow, through-hole structure, with a slot located in the first tube; the second tube is integrally connected to the first tube and has a resonant cavity inside.

[0014] In some alternative embodiments, the silencer further includes a second partition, a third partition, and a third silencer tube. The second partition is fixed to the second tube body and has a first through hole; the third partition is fixed to the second tube body and parallel to the second partition, and has a second through hole; the side wall of the third silencer tube has a second silencer hole, and the third silencer tube is fixed between the first and second through holes to enclose a resonant cavity with the second and third partitions.

[0015] In some alternative embodiments, the second partition forms a preset angle θ with the wall of the sound-absorbing body, where 90° < θ ≤ 145°.

[0016] In some embodiments, the air conditioner includes a refrigerant circulation line and the aforementioned muffler. The refrigerant circulation line includes a compressor, a condenser, a throttling element, and an evaporator connected in sequence, with thermocouples arranged at the compressor's discharge port, the condenser, and the evaporator; the muffler is connected in series in the refrigerant circulation line.

[0017] In some alternative embodiments, the muffler is located between the compressor exhaust port and the condenser; or, the muffler is located between the compressor return port and the evaporator.

[0018] The silencer provided in this embodiment can achieve the following technical effects:

[0019] The muffler includes a muffler body, a muffler assembly, and a baffle. The muffler body has a muffler cavity, and a slot is formed in the side wall of the muffler body. The muffler assembly includes a first muffler tube and a second muffler tube, respectively connected to both ends of the muffler body. The cross-sections of the first and second muffler tubes are smaller than the cross-section of the muffler cavity. The baffle seals the slot and is slidably connected to the inner wall of the muffler body. A first partition is fixedly connected to the baffle, and the outer periphery of the first partition is attached to the inner wall surface of the muffler body to divide the muffler cavity into a first chamber and a second chamber, which are connected only through a first muffler hole in the first partition. This application utilizes a built-in movable first partition to adjust the effective length of the first and second chambers, thereby better determining the frequency and amount of noise reduction required in the air conditioning refrigerant circulation system, solving the problem of frequent muffler replacements during air conditioning noise optimization and improvement.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0022] Figure 1 This is a schematic diagram of the overall structure of the muffler provided in the embodiments of this disclosure;

[0023] Figure 2 This is a partial structural schematic diagram of the muffler provided in an embodiment of this disclosure;

[0024] Figure 3 This is a partial cross-sectional structural diagram of the muffler provided in an embodiment of this disclosure;

[0025] Figure 4 This is a partial cross-sectional structural diagram of another muffler provided in an embodiment of this disclosure;

[0026] Figure 5This is another partial structural schematic diagram of the muffler provided in the embodiments of this disclosure;

[0027] Figure 6 This is a partial structural schematic diagram of the refrigerant circulation system of an air conditioner provided in an embodiment of this disclosure.

[0028] Figure label:

[0029] 1: Silencing body; 11: Groove; 2: First silencing pipe; 3: Second silencing pipe; 4: Baffle; 5: First partition; 51: First silencing hole; 6: Adjustment pin; 7: Positioning protrusion; 8: Compressor; 9: Condenser; 10: Evaporator. Detailed Implementation

[0030] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0031] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0033] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0034] Unless otherwise stated, the term "multiple" means two or more.

[0035] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0036] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0038] The main indicators for judging the quality of a silencer design are the sound transmission loss A and the noise reduction frequency F. Under the same inlet conditions, the wider the noise frequency bandwidth that the silencer can eliminate and the greater the sound transmission loss A, the better the design.

[0039] The expansion muffler is the most commonly used structural form of the resistive muffler, also known as the expansion type muffler.

[0040] It is designed based on the principle that sound waves in the pipe are reflected at points where the cross-section changes abruptly (expands or contracts), thus attenuating noise.

[0041] The main indicators for judging the quality of a silencer design are the sound transmission loss A and the noise reduction frequency F. Under the same inlet conditions, the wider the noise frequency bandwidth that the silencer can eliminate and the greater the sound transmission loss A, the better the design.

[0042] The expansion silencer is the most commonly used structural form of reactive silencer, also known as an expansion type silencer. It is designed based on the principle that sound waves in a pipe are reflected at points of abrupt change in cross-section, thus attenuating noise.

[0043] An expansion silencer consists of two basic components: a tube and a chamber. Its most basic form is the single-section expansion silencer.

[0044] The frequency at which traditional expansion-type mufflers eliminate noise is related to the effective length L of the muffler. When L is constant, the muffler can only eliminate noise at a fixed number of frequencies.

[0045] In the process of optimizing and improving the noise of a refrigeration system, in the absence of noise spectrum testing equipment, it is often necessary to replace the muffler multiple times to achieve a good optimization effect. The process of replacing the muffler requires disassembling the original muffler from the air conditioning piping system, purging the refrigerant from the system, connecting the new muffler, evacuating the system, and recharging the refrigerant.

[0046] Combination Figure 1-6 As shown, embodiments of this disclosure provide a muffler and an air conditioner.

[0047] The muffler provided in this embodiment includes a muffler body 1, a muffler assembly, a baffle 4, and a first partition 5. The muffler body 1 has a built-in muffler cavity, and a slot 11 is formed on the side wall of the muffler body 1. The muffler assembly includes a first muffler tube 2 and a second muffler tube 3, which are respectively connected to the two ends of the muffler body 1. The cross-sections of the first muffler tube 2 and the second muffler tube 3 are smaller than the cross-section of the muffler cavity. The baffle 4 blocks the slot 11 and is slidably connected to the inner wall of the muffler body 1. The first partition 5 is fixedly connected to the baffle 4. The first partition 5 has a first muffler hole 51. The outer periphery of the first partition 5 is attached to the inner wall surface of the muffler body 1 to divide the muffler cavity into a first chamber and a second chamber that are connected only through the first muffler hole 51.

[0048] When the air conditioner's refrigerant circulation system emits abnormal noise from compressor 8, adjust the position of the first baffle 5 within the silencer cavity until the abnormal noise is significantly reduced or disappears. Compared to traditional silencers, this eliminates the need for frequent disassembly and replacement of the silencer from the refrigerant circulation system, saving development time and costs.

[0049] Specifically, when noise reduction adjustments are required, the muffler is connected to the refrigerant circulation pipeline through the first muffler pipe 2 and the second muffler pipe 3. Gaseous refrigerant flows in through the first muffler pipe 2, passes through the first and second chambers, and then flows out through the second muffler pipe 3. During the refrigerant flow, by adjusting the sliding position of the baffle 4 on the inner wall of the muffler body 1, the position of the first baffle 5 in the muffler cavity can be controlled, thereby adjusting the effective length of the first and second chambers. This allows the muffler to eliminate a wider range of noise frequencies, achieving good noise reduction under all operating conditions of the air conditioner, and enabling effective air conditioner adjustments without replacing the muffler.

[0050] Optionally, the muffler also includes an adjustment pin 6, which is fixed to the baffle 4. The adjustment pin 6 and the first partition 5 are fixed to two opposing side walls of the baffle 4 and are located on the same plane perpendicular to the baffle 4.

[0051] Specifically, the adjustment pin 6 includes a square slider, which is fixed to the baffle 4 and extends perpendicularly to the baffle 4 outwards from the silencer body 1, allowing the tester to hold the adjustment pin 6 as a handle for easier movement of the baffle 4. The adjustment pin 6 and the first partition 5 are fixed to the two opposite side walls of the baffle 4 and are positioned on the same plane perpendicular to the baffle 4. This allows the adjustment pin 6 to determine the specific position of the baffle 4 within the silencer cavity, enabling more accurate calculation of the effective lengths of the first and second chambers, thus achieving better noise reduction performance for the silencer.

[0052] Optionally, the slot 11 is a straight slide, and the straight slide has scale lines on the side, and the adjustment pin 6 is limited to slide within the straight slide.

[0053] Specifically, the width of the adjusting pin 6 is equal to the width of the straight slide, thereby limiting the adjusting pin 6 to slide linearly within the straight slide, which in turn allows the first partition 5 to slide more stably perpendicular to the inner wall of the silencing cavity. In addition, by setting scale lines on the side of the straight slide, the position of the first partition 5 can be determined more conveniently and accurately, and the adjustment range of the first partition 5 can be better controlled.

[0054] Optionally, the muffler also includes multiple positioning protrusions 7, which are fixed at intervals on the two inner sidewalls of the straight slide rail, so that the straight slide rail forms multiple fixing positions for fixing the adjustment pin 6. Optionally, the positioning protrusions 7 are made of elastic material, preferably rubber. The scale on the muffler corresponds to different positioning protrusions 7. The positioning protrusions 7 are fixed on the slide rail, serving to fix the baffle 4 and determine the position of the partition.

[0055] Optionally, the length of the first partition 5 is greater than or equal to the length of the slot 11. In this way, regardless of how the positioning protrusion 7 slides in the slot 11, the baffle 4 is always in a state of blocking the slot 11 to prevent refrigerant leakage.

[0056] Understandably, the spacing between the adjacent positioning protrusions 7 is one silencing step. By setting the positioning protrusions 7, the displacement of the adjustment pin 6 during each silencing adjustment can be an integer multiple of the silencing step, thereby avoiding the problem of manual adjustment being too large or too small.

[0057] Optionally, the first partition 5 is also provided with an exhaust port, which is located at the bottom of the first partition 5 in the vertical direction. By providing an exhaust port, it is possible to prevent refrigerant from accumulating inside the cavity.

[0058] Optionally, the silencing body 1 includes a first tube and / or a second tube. The first tube is cylindrical and has a hollow, through-hole structure, with the slot 11 located in the first tube; the second tube is integrally connected to the first tube and has a resonant cavity inside.

[0059] Resonant cavity silencers exhibit strong frequency selectivity and a narrow silencing bandwidth, with significant silencing only occurring at their resonant frequency. Beyond this frequency, the silencing effect tends to decrease rapidly, making them unsuitable for applications where the excitation frequency varies or where a wider silencing frequency range is required. Traditional expansion silencers, on the other hand, can only eliminate noise at a few fixed frequencies. When eliminating multiple noise frequencies or noise caused by fluid pressure fluctuations, the number of silencers must be increased. This application incorporates an expansion cavity within the first tube and a resonant cavity within the second tube. By combining these two cavities, a greater sound transmission loss and a wider silencing bandwidth can be achieved without increasing the overall size of the silencer.

[0060] Optionally, the muffler further includes a second partition, a third partition, and a third silencing tube. The second partition is fixed to the second tube body and has a first through hole; the third partition is fixed to the second tube body and parallel to the second partition, and has a second through hole; the side wall of the third silencing tube has a second silencing hole, and the third silencing tube is fixed between the first and second through holes to enclose a resonant cavity with the second and third partitions. By setting the second partition, third partition, and third silencing tube inside the second tube body, the expansion cavity and resonant cavity are combined without changing the external dimensions of the muffler. The resonant cavity eliminates low-frequency noise, and the expansion cavity eliminates high-frequency noise, thus enabling the muffler to adapt to different noise reduction frequency bands.

[0061] Optionally, the second partition forms a preset angle θ with the wall of the sound-absorbing body 1, where 90° < θ ≤ 145°. The inclined second partition can widen the bandwidth of the noise frequency band that can be eliminated, thereby achieving a better sound-absorbing effect.

[0062] The air conditioner provided in this embodiment includes a refrigerant circulation pipeline and the aforementioned muffler. The refrigerant circulation pipeline includes a compressor 8, a condenser 9, a throttling element, and an evaporator 10 connected in sequence. Thermocouples are arranged in the middle of the exhaust port of the compressor 8, the condenser 9, and the evaporator 10. The muffler is connected in series in the refrigerant circulation pipeline.

[0063] Specifically, when an abnormal noise is heard from compressor 8 in the refrigerant circulation system, adjust the position of the internal baffle of the muffler until the abnormal noise is greatly reduced or disappears, and record the scale i on the muffler at this time. Thermocouples are placed at the return port of compressor 8, the middle of condenser 9, and the middle of evaporator 10. The temperatures returned during system operation are Td, Tc, and Te, respectively. Scale i corresponds to the effective length L1 of the first chamber and the effective length L2 of the second chamber of the muffler.

[0064] For refrigeration operation, the saturated state physical property parameter table for the refrigerant is consulted based on the temperature Tc in the middle of condenser 9, and the pressure Pc in the saturated state is obtained. Pc is approximately the pressure of the refrigerant at the exhaust port. Therefore, the sound velocity C of the refrigerant in the superheated state can be obtained based on the exhaust port temperature Td and Pc. For heating operation, the refrigerant sound velocity can be calculated as follows: The saturated state pressure Pe is obtained based on the temperature Te in the middle of evaporator 10, consulted based on the saturated state physical property parameter table for the refrigerant; Pe is approximately the pressure of the refrigerant at the exhaust port. Therefore, the sound velocity C of the refrigerant in the superheated state can be obtained based on the exhaust port temperature Td and Pe; at this time, the noise frequencies that the silencer can eliminate are f1=(2n+1)*C / (4*L1) and f2=(2n+1)*C / (4*L2).

[0065] Optionally, the muffler is located between the compressor 8 exhaust port and the condenser 9; or, the muffler is located between the compressor 8 return port and the evaporator 10.

[0066] Specifically, for an air conditioner muffler used in a single-cooling unit, the muffler can be installed between the compressor 87 exhaust port and the condenser 9, and between the compressor 8 return port and the evaporator 10. For an air conditioner muffler used in a heat pump unit, the muffler can be installed between the compressor 8 exhaust port and the four-way valve, between the compressor 8 return port and the four-way valve, and between the four-way valve and the evaporator 10. In the muffler commissioning process of this application, a single muffler is sufficient to complete the air conditioner commissioning process, eliminating the need for multiple mufflers to select the most suitable one, thus improving commissioning efficiency. Furthermore, the air conditioner muffler of this application has a simple structure, reducing the production cost of the commissioning process.

[0067] Optionally, the air conditioner muffler further includes a first silencing layer and a second silencing layer, wherein the first silencing layer is coated on the inner wall of the first pipe body and the second silencing layer is coated on the inner wall of the second pipe body.

[0068] Specifically, the first and / or second sound-absorbing layers can be glass wool, fiber sound-absorbing materials, etc. Preferably, the first and second sound-absorbing layers have a bulk density of 15 kg / m³. 3 The ultra-fine glass wool is used. This not only improves the noise reduction effect of the air conditioner muffler, but also does not restrict the contraction and extension of the folding cavity.

[0069] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A silencer, characterized in that, include: The silencing body has a silencing cavity inside, and the side wall of the silencing body has a slot. The silencing body includes a first tube and a second tube. The first tube has an expansion cavity inside, and the second tube has a resonance cavity inside. The silencing assembly includes a first silencing tube and a second silencing tube, which are respectively connected to both ends of the silencing body. The cross-sections of the first silencing tube and the second silencing tube are smaller than the cross-section of the silencing cavity. A baffle plate blocks the slot and is slidably connected to the inner wall of the sound-absorbing body; A first partition is fixedly connected to the baffle plate. The first partition has a first silencing hole. The outer periphery of the first partition is attached to the inner wall of the silencing body to divide the silencing cavity into a first chamber and a second chamber that are connected only through the first silencing hole. The second partition is fixed to the second tube body, and the second partition has a first through hole; A third partition plate is fixed to the second tube body, and the third partition plate has a second through hole; and, The third silencer tube has a second silencer hole on its side wall. The third silencer tube is fixed between the first through hole and the second through hole to enclose the resonant cavity with the second partition and the third partition.

2. The silencer according to claim 1, characterized in that, Also includes: An adjustment pin is fixed to the baffle plate. The adjustment pin and the first partition plate are fixed to two opposing side walls of the baffle plate and are located on the same plane perpendicular to the baffle plate.

3. The silencer according to claim 2, characterized in that, The slot is a straight slide, and the straight slide has scale lines on its side. The adjustment pin slides within the straight slide.

4. The silencer according to claim 3, characterized in that, Also includes: The positioning protrusions are multiple in number and are fixed at intervals to the two inner sidewalls of the linear slide, so that the linear slide forms multiple fixing positions for fixing the adjustment pin.

5. The silencer according to claim 1, characterized in that, The first partition also has an exhaust hole, which is located at the bottom of the first partition in the vertical direction.

6. The silencer according to claim 1, characterized in that, The first tube is cylindrical and has a hollow, through-hole structure; the slot is located in the first tube; and / or, The second tube is integrally connected to the first tube, and a resonant cavity is provided inside the second tube.

7. The silencer according to claim 6, characterized in that, The third partition is parallel to the second partition.

8. The muffler according to claim 7, characterized in that, The second partition forms a preset angle θ with the wall of the sound-absorbing body, where 90° < θ ≤ 145°.

9. An air conditioner, characterized in that, include: A refrigerant circulation pipeline includes a compressor, a condenser, a throttling element, and an evaporator connected in sequence, wherein thermocouples are arranged at the discharge port of the compressor, in the middle of the condenser, and in the evaporator; and, The muffler as described in any one of claims 1 to 8, wherein the muffler is connected in series in the refrigerant circulation line.

10. The air conditioner according to claim 9, characterized in that, The silencer is located between the compressor exhaust port and the condenser; or, The silencer is located between the compressor return port and the evaporator.

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