A variable cross-section silencer

Abstract

The present invention discloses a variable cross-section muffler, comprising a muffler base and an opening structure, wherein an exhaust port is provided in the middle of the muffler base, the muffler base is provided with a muffler base contact, the opening structure is mounted on the inner side of the muffler base, the opening structure is arranged to block the exhaust port, the opening structure is fixedly connected to the muffler base, the opening structure is provided with a metal sheet, a metal contact is mounted on the metal sheet, and the metal contact contacts the muffler base contact. The present invention proposes a muffler with a variable exhaust cross-sectional area. When the frequency of the compressor increases and the temperature of the compressor increases, the opening structure is heated and opened, and the exhaust cross-sectional area of ​​the muffler increases, thereby effectively reducing the exhaust resistance, thereby reducing the exhaust temperature of the muffler, improving the energy efficiency of the compressor, and keeping the noise level of the compressor unchanged.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, in particular to a variable-section muffler. Background Art

[0002] With the national upgrade of air conditioner energy efficiency standards, air conditioner energy efficiency requirements are becoming increasingly stringent. Air conditioner energy efficiency is often referred to as the cooling energy efficiency ratio (EER), which is the ratio of additional cooling capacity to additional power consumption. Air conditioner energy efficiency measures the amount of cooling or heating produced for the same amount of electricity consumed. Higher efficiency air conditioners use less electricity. Therefore, air conditioner energy efficiency is a crucial parameter in evaluating the performance of an air conditioner.

[0003] As a key component of air conditioners, the compressor's energy efficiency determines its overall efficiency. For the same compressor model, the compressor's muffler is fixed, with a fixed exhaust area. Rotary compressor mufflers are noise-reducing devices installed on the exhaust ducts of the upper and lower flanges of rolling rotor compressors. They block the propagation of sound waves while allowing airflow, making them an effective tool for noise control. Their muffler mechanism uses a resistive exhaust muffler to reduce pressure pulsation and noise levels. This mechanism utilizes sudden changes in the cross-sectional area of ​​the pipe in the flow direction, causing airflow to reflect or interfere, thereby reducing noise levels.

[0004] Air conditioners on the market are gradually upgrading from fixed-frequency air conditioners to variable-frequency air conditioners. Variable-frequency compressors generally operate within a 20-100Hz range, and compressor mufflers cannot accommodate all frequencies. During low-frequency operation, the compressor's exhaust temperature is low, the exhaust resistance is minimal, and the compressor operates normally. However, during high-frequency operation, the exhaust temperature rises and the exhaust resistance increases, resulting in reduced compressor efficiency. Therefore, ensuring that the compressor maintains energy efficiency even at high-frequency operation is an urgent issue. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a variable-section silencer to solve the problems raised by the above-mentioned background technology, increase the exhaust area of ​​the compressor when operating at high frequency, reduce the exhaust temperature, and thus improve the energy efficiency of the compressor.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a variable-section silencer, including a silencer base and an opening structure, an exhaust port is provided in the middle of the silencer base, the silencer base is provided with a silencer base contact, the opening structure is installed on the inner side of the silencer base, the opening structure is shielded on the exhaust port, the opening structure is fixedly connected to the silencer base, the opening structure is provided with a metal sheet, a metal contact is installed on the metal sheet, and the metal contact is in contact with the silencer base contact.

[0007] As a further improvement of the present invention: the variable cross-section muffler is provided with at least two opening structures, and the opening structures are arranged around the exhaust port of the muffler base.

[0008] As a further improvement of the present invention: the variable-section muffler is provided with two opening structures, and the two opening structures are symmetrically arranged at the two ends of the inner side of the muffler base.

[0009] As a further improvement of the present invention: the opening structure is crescent-shaped, and the opening structure includes an inner arc segment, an outer arc segment and a fixing portion, and the two ends of the inner arc segment and the outer arc segment are connected by the fixing portion.

[0010] As a further improvement of the present invention: the fixing portion is fixedly connected to the inner side of the muffler base, and the fixing portion and the muffler base are welded or riveted.

[0011] As a further improvement of the present invention: the metal sheet is arranged at the inner arc section of the opening structure, and there is a gap between the metal sheet and the muffler base.

[0012] As a further improvement of the present invention: the metal sheet is composed of a single metal or multiple metals, and different metals have different deformation sizes due to temperature changes.

[0013] As a further improvement of the present invention: the metal contact is arranged in the outer arc section of the opening structure, and the metal contact is arranged along the edge of the outer arc section.

[0014] As a further improvement of the present invention: the metal contact is connected to the muffler base contact to form a seal.

[0015] As a further improvement of the present invention: the muffler base contact is installed on the inner side of the muffler base, and the muffler base contact corresponds to the metal contact.

[0016] As a further improvement of the present invention: the exhaust port includes a basic area and a plurality of added areas, the basic area is arranged in the middle of the muffler base, and the plurality of added areas are arranged around the basic area.

[0017] As a further improvement of the present invention: the basic area is circular in shape, the added area is crescent-shaped, and the added area is connected to the basic area.

[0018] As a further improvement of the present invention: when the opening structure is in a closed state, the gas is discharged from the base area of ​​the exhaust port; when the opening structure is in an open state, the gas is discharged from the base area and the increased area of ​​the exhaust port.

[0019] Compared with existing technologies, the present invention offers the following advantages: It proposes a muffler with a variable exhaust cross-sectional area. As the compressor frequency and temperature increase, the opening structure heats up and opens, increasing the muffler's exhaust cross-sectional area. This effectively reduces exhaust resistance, thereby lowering the muffler's exhaust temperature and improving compressor energy efficiency while maintaining constant compressor noise. Tests have shown that the opening structure of the present invention can increase the exhaust cross-sectional area by over 200%, reduce exhaust temperature by 1-4°C, and improve compressor energy efficiency by over 1%, while maintaining constant noise levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the inner structure of the present invention;

[0022] Figure 3 It is an exploded view of the structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the state in which the metal contact is in contact with the muffler base contact;

[0024] Figure 5 This is a schematic diagram of the state where the metal contacts are separated from the muffler base contacts.

[0025] Explanation of the numbers in the schematic diagram:

[0026] 1. Muffler base; 11. Muffler base contact; 2. Opening structure; 21. Metal sheet; 22. Metal contact; 23. Inner arc segment; 24. Outer arc segment; 25. Fixed part; 3. Exhaust port; 31. Basic area; 32. Additional area. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] The present invention will now be further described with reference to the accompanying drawings and embodiments:

[0032] Implementation Case 1:

[0033] like Figures 1 to 3 As shown, this embodiment 1 provides a variable-section silencer, including a silencer base 1 and an opening structure 2, wherein the silencer base 1 is provided with an exhaust port 3 in the middle, the silencer base 1 is provided with a silencer base contact 11, the opening structure 2 is installed on the inner side of the silencer base 1, the opening structure 2 is blocked on the exhaust port 3, the opening structure 2 is fixedly connected to the silencer base 1, the opening structure 2 is provided with a metal sheet 21, a metal contact 22 is installed on the metal sheet 21, and the metal contact 22 is in contact with the silencer base contact 11.

[0034] The variable cross-section muffler is provided with at least two opening structures 2 , and the opening structures 2 are arranged around the exhaust port 3 of the muffler base 1 .

[0035] The opening structure 2 is crescent-shaped and includes an inner arc segment 23 , an outer arc segment 24 and a fixing portion 25 . The inner arc segment 23 and the outer arc segment 24 are connected at both ends by the fixing portion 25 .

[0036] The fixing portion 25 is fixedly connected to the inner side of the muffler base 1 , and the fixing portion 25 and the muffler base 1 are welded or riveted.

[0037] The metal sheet 21 is arranged at the inner arc section 23 of the opening structure 2 , and a gap exists between the metal sheet 21 and the muffler base 1 .

[0038] The metal sheet 21 is made of a single metal or multiple metals, and different metals may deform to different extents due to temperature changes.

[0039] The metal contact 22 is disposed on the outer arc section 24 of the opening structure 2 , and the metal contact 22 is disposed along the edge of the outer arc section 24 .

[0040] The metal contact 22 is connected to the muffler base contact 11 to form a seal.

[0041] The muffler base contact 11 is installed on the inner side of the muffler base 1 , and the muffler base contact 11 corresponds to the metal contact 22 .

[0042] The exhaust port 3 includes a base area 31 and a plurality of added areas 32 . The base area 31 is located in the middle of the muffler base 1 , and the plurality of added areas 32 are arranged around the base area 31 .

[0043] The base region 31 is circular in shape, the added region 32 is crescent-shaped, and the added region 32 is connected to the base region 31 .

[0044] When the opening structure 2 is in a closed state, gas is discharged from the base area 31 of the exhaust port 3 ; when the opening structure 2 is in an open state, gas is discharged from the base area 31 and the increased area 32 of the exhaust port 3 .

[0045] Implementation Case 2:

[0046] like Figures 1 to 3 As shown, the second embodiment of the present invention provides a variable-section silencer, including a silencer base 1 and an opening structure 2, wherein the silencer base 1 is provided with an exhaust port 3 in the middle, the silencer base 1 is provided with a silencer base contact 11, the opening structure 2 is installed on the inner side of the silencer base 1, the opening structure 2 is blocked on the exhaust port 3, the opening structure 2 is fixedly connected to the silencer base 1, the opening structure 2 is provided with a metal sheet 21, a metal contact 22 is installed on the metal sheet 21, and the metal contact 22 is in contact with the silencer base contact 11.

[0047] The variable cross-section silencer is provided with two opening structures 2 , which are symmetrically arranged at both ends of the inner side of the silencer base 1 , and the opening structures 2 are arranged around the exhaust port 3 of the silencer base 1 .

[0048] The opening structure 2 is crescent-shaped and includes an inner arc segment 23 , an outer arc segment 24 and a fixing portion 25 . The inner arc segment 23 and the outer arc segment 24 are connected at both ends by the fixing portion 25 .

[0049] The fixing portion 25 is fixedly connected to the inner side of the muffler base 1 , and the fixing portion 25 and the muffler base 1 are welded.

[0050] The metal sheet 21 is arranged at the inner arc section 23 of the opening structure 2 , and a gap exists between the metal sheet 21 and the muffler base 1 .

[0051] The metal sheet 21 is a copper sheet.

[0052] The metal contact 22 is disposed on the outer arc section 24 of the opening structure 2 , and the metal contact 22 is disposed along the edge of the outer arc section 24 .

[0053] The metal contact 22 is connected to the muffler base contact 11 to form a seal.

[0054] The muffler base contact 11 is installed on the inner side of the muffler base 1 , and the muffler base contact 11 corresponds to the metal contact 22 .

[0055] The exhaust port 3 includes a base area 31 and two added areas 32 . The base area 31 is located in the middle of the muffler base 1 , and the two added areas 32 are arranged around the base area 31 .

[0056] The base area 31 is circular in shape, the added area 32 is crescent-shaped, the added area 32 is connected to the base area 31 , and the added area 32 is located above the inner arc section 23 of the opening structure 2 .

[0057] When the opening structure 2 is in a closed state, gas is discharged from the base area 31 of the exhaust port 3 ; when the opening structure 2 is in an open state, gas is discharged from the base area 31 and the increased area 32 of the exhaust port 3 .

[0058] By using the variable cross-section muffler of the second embodiment, the exhaust cross-sectional area is increased by 242%, the exhaust temperature is reduced by 1.85°C, the compressor energy efficiency is increased by 1%, and the noise level remains unchanged. The detailed comparison parameters are shown in Table 1 below:

[0059]

[0060] Table 1: Comparison of operating parameters of the improved muffler structure and the structure before improvement in Example 2

[0061] Implementation Case 3:

[0062] The third embodiment of the present invention provides a variable-section silencer, including a silencer base 1 and an opening structure 2. An exhaust port 3 is provided in the middle of the silencer base 1. The silencer base 1 is provided with a silencer base contact 11. The opening structure 2 is installed on the inner side of the silencer base 1. The opening structure 2 is blocked on the exhaust port 3. The opening structure is fixedly connected to the silencer base 1. The opening structure 2 is provided with a metal sheet 21. A metal contact 22 is installed on the metal sheet 21. The metal contact 22 is in contact with the silencer base contact 11.

[0063] The variable cross-section muffler is provided with three opening structures 2 , and the opening structures 2 are arranged around the exhaust port 3 of the muffler base 1 .

[0064] The opening structure 2 is crescent-shaped and includes an inner arc segment 23 , an outer arc segment 24 and a fixing portion 25 . The inner arc segment 23 and the outer arc segment 24 are connected at both ends by the fixing portion 25 .

[0065] The fixing portion 25 is fixedly connected to the inner side of the muffler base 1 , and the fixing portion 25 and the muffler base 1 are welded.

[0066] The metal sheet 21 is arranged at the inner arc section 23 of the opening structure 2 , and a gap exists between the metal sheet 21 and the muffler base 1 .

[0067] The metal sheet 21 is an iron sheet.

[0068] The metal contact 22 is disposed on the outer arc section 24 of the opening structure 2 , and the metal contact 22 is disposed along the edge of the outer arc section 24 .

[0069] The metal contact 22 is connected to the muffler base contact 11 to form a seal.

[0070] The muffler base contact 11 is installed on the inner side of the muffler base 1 , and the muffler base contact 11 corresponds to the metal contact 22 .

[0071] The exhaust port 3 includes a base area 31 and three added areas 32 . The base area 31 is located in the middle of the muffler base 1 , and the three added areas 32 are arranged around the base area 31 .

[0072] The base area 31 is circular in shape, the added area 32 is crescent-shaped, the added area 32 is connected to the base area 31 , and the added area 32 is located above the inner arc section 23 of the opening structure 2 .

[0073] When the opening structure 2 is in a closed state, gas is discharged from the base area 31 of the exhaust port 3 ; when the opening structure 2 is in an open state, gas is discharged from the base area 31 and the increased area 32 of the exhaust port 3 .

[0074] Implementation Case 4:

[0075] The fourth embodiment of the present invention provides a variable-section silencer, including a silencer base 1 and an opening structure 2, wherein an exhaust port 3 is provided in the middle of the silencer base 1, and the silencer base 1 is provided with a silencer base contact 11. The opening structure 2 is installed on the inner side of the silencer base 1, and the opening structure 2 is arranged to block the exhaust port 3. The opening structure 2 is fixedly connected to the silencer base 1, and the opening structure 2 is provided with a metal sheet 21, and a metal contact 22 is installed on the metal sheet 21, and the metal contact 22 is in contact with the silencer base contact 11.

[0076] The variable cross-section muffler is provided with four opening structures 2 , which are symmetrically arranged on the inner side of the muffler base 1 , and the opening structures 2 are arranged around the exhaust port 3 of the muffler base 1 .

[0077] The opening structure 2 is crescent-shaped and includes an inner arc segment 23 , an outer arc segment 24 and a fixing portion 25 . The inner arc segment 23 and the outer arc segment 24 are connected at both ends by the fixing portion 25 .

[0078] The fixing portion 25 is fixedly connected to the inner side of the muffler base 1 , and the fixing portion 25 and the muffler base 1 are riveted.

[0079] The metal sheet 21 is arranged at the inner arc section 23 of the opening structure 2 , and a gap exists between the metal sheet 21 and the muffler base 1 .

[0080] The metal sheet 21 is a copper sheet or an iron sheet.

[0081] The metal contact 22 is disposed on the outer arc section 24 of the opening structure 2 , and the metal contact 22 is disposed along the edge of the outer arc section 24 .

[0082] The metal contact 22 is connected to the muffler base contact 11 to form a seal.

[0083] The muffler base contact 11 is installed on the inner side of the muffler base 1 , and the muffler base contact 11 corresponds to the metal contact 22 .

[0084] The exhaust port 3 includes a base area 31 and four added areas 32 . The base area 31 is located in the middle of the muffler base 1 , and the four added areas 32 are arranged around the base area 31 .

[0085] The base area 31 is circular in shape, the added area 32 is crescent-shaped, the added area 32 is connected to the base area 31 , and the added area 32 is located above the inner arc section 23 of the opening structure 2 .

[0086] When the opening structure 2 is in a closed state, gas is discharged from the base area 31 of the exhaust port 3 ; when the opening structure 2 is in an open state, gas is discharged from the base area 31 and the increased area 2 of the exhaust port 3 .

[0087] The working principle of the present invention is as follows: when the compressor is running at a low frequency, the exhaust temperature of the compressor is low, the deformation amplitude of the metal sheet 21 is small, the metal contact 22 cannot separate from the muffler base contact 11, the exhaust cross-sectional area of ​​the muffler remains unchanged, and the gas is discharged from the base area 31 of the exhaust port 3. The muffler satisfies the silencing effect and meets the energy efficiency requirements at the same time.

[0088] When the compressor operates at high frequencies, its exhaust volume increases. While the muffler's exhaust cross-sectional area remains unchanged, the compressor's exhaust resistance and exhaust temperature increase. When the temperature reaches the point where metal contact 22 and muffler base contact 11 separate, metal contact 21 of opening structure 2 opens, allowing gas to be discharged from base area 31 and increased area 32 of exhaust port 3. This increases the exhaust cross-sectional area, reduces exhaust resistance, and improves energy efficiency. At high frequencies, compressor noise comes from the motor's electromagnetic noise and the pump's exhaust noise. Therefore, when the muffler's cross-sectional area changes, the noise level does not deteriorate.

[0089] The present invention's main function: It proposes a muffler with a variable exhaust cross-sectional area. As the compressor frequency and temperature increase, the opening structure heats up and opens, increasing the muffler's exhaust cross-sectional area. This effectively reduces exhaust resistance, thereby lowering the muffler's exhaust temperature and improving compressor energy efficiency while maintaining constant compressor noise. Tests have shown that the opening structure can increase the exhaust cross-sectional area by over 200%, reduce exhaust temperature by 1-4°C, and improve compressor energy efficiency by over 1%, while maintaining constant noise levels.

[0090] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical solutions and technical concepts of the present invention without creative mental work, and all of them fall within the scope of protection of the present invention.

Claims

1. A variable cross-section muffler, characterized in that: The muffler base comprises a muffler base and an opening structure, an exhaust port is provided in the middle of the muffler base, the muffler base is provided with a muffler base contact, the opening structure is installed on the inner side of the muffler base, the opening structure is shielded on the exhaust port, the opening structure is fixedly connected to the muffler base, the opening structure is provided with a metal sheet, a metal contact is installed on the metal sheet, the metal contact is in contact with the muffler base contact, the variable cross-section muffler is provided with at least two opening structures, the opening structure is arranged around the exhaust port of the muffler base, the opening structure is crescent-shaped, the opening structure comprises an inner arc segment, an outer arc segment and a fixing part, the two ends of the inner arc segment and the outer arc segment are connected by a fixing part, the metal contact is provided in the outer arc segment of the opening structure, the metal contact is provided along the edge of the outer arc segment, the fixing part is fixedly connected to the inner side of the muffler base, and the fixing part and the muffler base are welded or riveted.

2. A variable cross-section silencer according to claim 1, characterized in that: The metal sheet is arranged at the inner arc section of the opening structure, and there is a gap between the metal sheet and the muffler base.

3. The variable cross-section muffler according to claim 1, characterized in that: The metal sheet is composed of a single metal or multiple metals.

4. The variable cross-section muffler according to claim 1, characterized in that: The metal contacts are connected to the muffler base contacts to form a seal.

5. The variable cross-section muffler according to claim 1, characterized in that: The muffler base contact is installed on the inner side of the muffler base, and the muffler base contact corresponds to the metal contact.

6. The variable cross-section muffler according to claim 1, characterized in that: The exhaust port includes a basic area and a plurality of added areas. The basic area is arranged in the middle of the muffler base, and the plurality of added areas are arranged around the basic area.

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