Silence chamber length adjustment method, length-adjustable silencer and variable frequency air conditioner

Abstract

The present invention discloses a method for adjusting the length of a silencer cavity, which can adjust the length of the silencer cavity to eliminate the transmission sound problem generated by a variable frequency air conditioner; and also discloses a length-adjustable silencer for realizing the method for adjusting the length of the silencer cavity, which includes a silencer body, the silencer body having a cavity; the length-adjustable silencer also includes: a baffle driving device arranged in the cavity; a baffle structure can be slidably connected in the cavity and connected to the baffle driving device, and is in communication with both ends of the silencer body; the cavity includes a silencer cavity located between the baffle structure and the inlet end of the silencer body; the baffle driving device drives the baffle structure to slide back and forth along the length direction of the silencer body to change the length of the silencer cavity. The length of the silencer cavity of the length-adjustable silencer provided by the present invention can be adjusted by the magnitude of the electromagnetic force, and is convenient and reliable to use; and a variable frequency air conditioner having the length-adjustable silencer is provided.

Description

Technical Field

[0001] The present invention relates to a resistant silencer, in particular to a silencer cavity length adjustment method, and also to a length-adjustable silencer for implementing the silencer cavity length adjustment method, and to a variable frequency air conditioner with the length-adjustable silencer. Background Art

[0002] The transmission sound problem is a common problem in air conditioning systems, which will affect the sound quality of the indoor unit and cause serious after-sales complaints. For transmission sound, a reactive muffler is usually used to solve it. Existing reactive mufflers usually use a fixed-length muffler cavity to solve the transmission sound problem generated by a fixed-frequency machine. However, for a variable-frequency machine, the frequency generated by the variable-frequency machine will change. As the frequency changes, the peak value of the transmission sound will also change. Therefore, the existing reactive muffler with a fixed-length muffler cavity cannot effectively solve the transmission sound problem generated by the variable-frequency machine. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems of the prior art and provide a method for adjusting the length of a silencer chamber to achieve adjustment of the length of the silencer chamber to eliminate the problem of transmitted sound generated by a variable frequency air conditioner; it also provides a length-adjustable silencer for implementing the method for adjusting the length of the silencer chamber. The length-adjustable silencer is a new type of silencer structure with adjustable silencer chamber length. The length of the silencer chamber can be adjusted by the magnitude of the electromagnetic force, and the use is convenient and reliable; and a variable frequency air conditioner having the length-adjustable silencer is provided.

[0004] In order to achieve the above object, the present invention adopts the following scheme:

[0005] A method for adjusting the length of a muffler cavity comprises the following steps:

[0006] S1. Determine the refrigerant pressure of the refrigerant entering the muffler chamber and the duration of the refrigerant pressure in the muffler chamber at each frequency generated by the variable frequency air conditioner;

[0007] S2. According to the refrigerant pressure, a driving force is used to drive the baffle structure to move in the silencer chamber, and the length of the silencer chamber is adjusted to eliminate the transmission sound problem generated by the variable frequency air conditioner.

[0008] Furthermore, the driving force includes electromagnetic force and elastic force.

[0009] Furthermore, the electromagnetic force is an electromagnetic force generated by changing the magnitude of the coil current.

[0010] The present invention also discloses a length-adjustable muffler, comprising a muffler body, wherein the muffler body has a cavity with two ends connected, which is used to implement the above-mentioned muffler cavity length adjustment method; the length-adjustable muffler also includes:

[0011] a baffle driving device, which is disposed in the cavity;

[0012] a baffle structure, which is slidably connected in the cavity and connected to the baffle driving device, and is in communication with both ends of the muffler body;

[0013] The chamber includes a muffler chamber located between the baffle structure and the inlet end of the muffler body;

[0014] The baffle driving device drives the baffle structure to slide back and forth along the length direction of the muffler body to change the length of the muffler cavity.

[0015] Furthermore, the baffle driving device comprises:

[0016] An elastic component, one end of which is connected to the cavity, and the other end of which is connected to the baffle structure, and slides synchronously with the baffle structure to extend and contract;

[0017] The driving assembly is located in the cavity and is used to generate electromagnetic force to drive and adjust the baffle structure to slide back and forth along the length direction of the muffler body to change the length of the muffler cavity.

[0018] Furthermore, the driving assembly comprises:

[0019] A coil ring, which is arranged in the left end of the muffler cavity;

[0020] A first sealing rubber ring, which is arranged between the coil ring and the muffler body;

[0021] A coil, which is sleeved on the coil ring;

[0022] The magnetic conductor is arranged on the baffle structure and slides synchronously with the baffle structure along the length direction of the muffler body, and acts with the electromagnetic force generated by the coil to adjust the baffle structure to slide back and forth along the length direction of the muffler body.

[0023] Furthermore, the elastic component is a spring.

[0024] Furthermore, the length change amount of the muffler cavity after reciprocating sliding in the length direction of the muffler body is △x; and the △x satisfies the following formula condition:

[0025]

[0026] Among them, P is the refrigerant pressure in the muffler, S is the cross-sectional area of ​​the left end of the baffle structure, B is the magnetic induction intensity, L is the effective length of the coil, I is the current intensity, g is the acceleration of gravity, and k is the spring stiffness coefficient.

[0027] Furthermore, the baffle structure comprises:

[0028] A baffle, which is slidably connected in the cavity and connected to the elastic component, and reciprocates along the length direction of the muffler body;

[0029] The drainage pipe has one end arranged on the baffle plate and communicated with the two ends of the muffler body, and slides back and forth along the length direction of the muffler body along with the baffle plate.

[0030] Furthermore, a second sealing rubber ring is provided between the baffle and the muffler body; an inlet transition pipe connected to the coil ring and communicated with the muffler chamber is sleeved on the inlet end of the muffler body; an outlet transition pipe is sleeved on the outlet end of the muffler body; the other end of the drainage pipe is nested in the outlet transition pipe; a third sealing rubber ring is provided between the other end of the drainage pipe and the outlet transition pipe.

[0031] The present invention also discloses a variable frequency air conditioner, comprising the above-mentioned length-adjustable silencer.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] 1. The method for adjusting the length of the silencer chamber of the present invention drives the baffle structure to move in the chamber through a driving force, thereby adjusting the length of the silencer chamber and solving the problem of air-conditioning sound transmission caused by the compressor. The method has a simple structure, high reliability, greater versatility and a wider range of adaptability.

[0034] 2. The length-adjustable silencer of the present invention utilizes the electromagnetic force and elastic force generated by the baffle driving device to drive the adjustable baffle structure to slide back and forth along the length direction of the silencer body, thereby adjusting the length of the silencer cavity to meet the silencer requirements of different frequency points. The structure is simple, the use is convenient and reliable, and it is conducive to large-scale application of the product.

[0035] 3. The variable frequency air conditioner of the present invention solves the problem of air conditioning transmission sound caused by the compressor through a length-adjustable silencer, and has a simple structure, high reliability, greater versatility and a wider range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Figure 1 It is a stereoscopic view of the length-adjustable silencer of the present invention.

[0038] Figure 2 yes Figure 1 A cross-sectional view along the AA direction is shown.

[0039] Figure 3It is an exploded stereoscopic view of the length-adjustable silencer of the present invention.

[0040] Figure 4 It is an analysis diagram of the stress condition of the baffle of the length-adjustable silencer of the present invention.

[0041] The picture includes:

[0042] Muffler body 1, cavity 11, muffler cavity 111, baffle driving device 24, elastic component 2, baffle structure 3, baffle 31, drainage pipe 32, driving component 4, coil ring 41, coil 42, magnetic conductor 43, first sealing rubber ring 5, second sealing rubber ring 6, introduction transition pipe 7, lead-out transition pipe 8, third sealing rubber ring 9. DETAILED DESCRIPTION

[0043] The present invention is further described in conjunction with the following examples.

[0044] A method for adjusting the length of a muffler cavity comprises the following steps:

[0045] S1. Determine the refrigerant pressure of the refrigerant entering the muffler chamber and the duration of the refrigerant pressure in the muffler chamber at each frequency generated by the variable frequency air conditioner;

[0046] S2. According to the refrigerant pressure, a driving force is used to drive the baffle structure to move in the silencer chamber, and the length of the silencer chamber is adjusted to eliminate the transmission sound problem generated by the variable frequency air conditioner.

[0047] Wherein, the driving force includes electromagnetic force and elastic force. The electromagnetic force is an electromagnetic force generated by changing the magnitude of the coil current. Since the frequency generated by the variable frequency air conditioner will change, the peak value of the transmitted sound will also change with the change of the frequency, and the transmitted sound is transmitted into the silencer chamber 111 through the refrigerant. Therefore, according to each frequency change of the variable frequency air conditioner and the duration of the frequency in the silencer chamber, the refrigerant pressure of the refrigerant entering the silencer chamber 111 at this frequency can be determined; the electromagnetic force drives the baffle structure to move in the silencer chamber to adjust the length of the silencer chamber, thereby solving the problem of air conditioning transmission sound caused by the compressor, with simple structure, high reliability, stronger versatility and wider adaptability.

[0048] like Figures 1 to 4A length-adjustable silencer comprises a silencer body 1, wherein the silencer body 1 has a cavity 11 connected at both ends, which is used to implement the above-mentioned silencer cavity length adjustment method; the length-adjustable silencer also comprises a baffle driving device 24 and a baffle structure 3. Among them, the baffle driving device 24 is arranged in the cavity 11; the baffle structure 3 can be slidably connected in the cavity 11 and connected to the baffle driving device 24, and is connected to both ends of the silencer body 1; the cavity 11 comprises a silencer cavity 111 located between the baffle structure 3 and the inlet end of the silencer body 1; the baffle driving device 24 drives the baffle structure 3 to slide back and forth along the length direction of the silencer body 1 to change the length of the silencer cavity. The length-adjustable silencer uses the baffle driving device 24 to drive the baffle structure 3 to slide back and forth along the length direction of the silencer body 1 to adjust the length of the silencer cavity 111 to meet the noise reduction requirements of different frequency points. The structure is simple, the use is convenient and reliable, and it is conducive to large-scale application of the product.

[0049] Embodiment 1:

[0050] The baffle driving device 24 includes an elastic component 2 and a driving component 4. One end of the elastic component 2 is connected to the cavity 11, and the other end is connected to the baffle structure 3, and slides synchronously with the baffle structure 3 to extend and contract; the driving component 4 is located in the cavity 11, and is used to generate electromagnetic force to drive and adjust the baffle structure 3 to slide back and forth along the length direction of the muffler body 1 to change the length of the muffler cavity 111. After the refrigerant enters the silencer chamber 111, according to the refrigerant pressure of the refrigerant entering the silencer chamber 111 and the duration of the refrigerant pressure in the silencer chamber 111, the driving component 4 is used to generate an electromagnetic force, and the baffle structure 3 is adjusted to slide back and forth along the length direction of the silencer body 1, and the elastic component 2 is driven to slide synchronously with the baffle structure 3 to extend or contract, so that the elastic component generates an elastic force, and the pressure of the refrigerant entering the silencer chamber is offset by the force of the driving component 4 and the elastic force of the elastic component, so as to adjust the length of the silencer chamber 111 to meet the silencing requirements of different frequency points, with a simple structure, convenient and reliable use, and conducive to large-scale application of the product. The elastic component 2 is a spring.

[0051] The driving assembly 4 includes a coil ring 41, a coil 42 and a magnetic conductor 43. The coil ring 41 is arranged in the left end of the muffler cavity 111; the coil 42 is sleeved on the coil ring 41; the coil is fixed and positioned by the coil ring 41. The magnetic conductor 43 is arranged on the baffle structure 3 and slides synchronously with the baffle structure 3 along the length direction of the muffler body 1, and acts with the coil 42 that is electromagnetically inductive to adjust the baffle structure 3 to slide back and forth along the length direction of the muffler body 1. In this specific embodiment, the length of the silencer chamber 111 of the length-adjustable silencer is adjustable, and the length adjustment of the silencer chamber 111 is achieved by adjusting the magnitude of the electromagnetic force. The magnitude of the electromagnetic force is controlled by controlling the magnitude of the current generated by the coil 42. Under the action of the electromagnetic force, it interacts with the magnetizer 43 to adjust the baffle structure 3 to slide back and forth along the length direction of the silencer body 1, and drives the elastic component 2 to slide synchronously with the baffle structure 3 to extend or contract, so that the elastic component 2 generates an elastic force, and the electromagnetic force generated by the coil changing the current and the elastic force of the elastic component 2 offset the pressure of the refrigerant entering the silencer chamber, thereby achieving the adjustment of the length of the silencer chamber 111 to meet the silencing requirements of different frequency points. The structure is simple, easy to use and reliable, and is conducive to large-scale application of the product. Specifically, the magnetizer 43 is a magnetic ring with a simple structure, which interacts with the electromagnetic force generated by the coil, and is convenient for adjusting the length of the silencer chamber 111.

[0052] The baffle structure 3 includes a baffle 31 and a drainage tube 32. The baffle 31 is slidably connected in the cavity 11 and connected to the elastic component 2, and slides back and forth along the length direction of the muffler body 1; the magnet 43 is arranged on the baffle 31; one end of the drainage tube 32 is arranged on the baffle 31 and communicates with the two ends of the muffler body 1, and slides back and forth along the length direction of the muffler body 1 with the baffle 31. Under the action of the electromagnetic force generated by the coil 42, it interacts with the magnet 43 to adjust the baffle 31 to slide back and forth along the length direction of the muffler body 1, thereby adjusting the length of the muffler cavity 111 to meet the muffler requirements of different frequency points. The drainage tube 32 plays the role of draining the refrigerant and preventing the refrigerant from entering the cavity 11 where the spring is placed, affecting the adjustment of the length of the muffler cavity 111.

[0053] like Figure 4 As shown, the force analysis of the baffle 31 shows that when the force on the baffle 31 is balanced, the length of the effective silencer cavity 11 of the muffler reaches a stable state. At this time, the force on the baffle 31 is as follows:

[0054] F1=F2+F3

[0055] Wherein, F1 is the refrigerant pressure, F1=PS, P is the refrigerant pressure in the muffler, and S is the cross-sectional area of ​​the left end of the baffle 31;

[0056] F2 spring force, F2 = k△x, k is the spring stiffness coefficient, △x is the change in the effective muffler cavity 11;

[0057] F3 coil 42 magnetic force, B is the magnetic induction intensity, L is the effective length of the coil 42, I is the current intensity, g is the gravitational acceleration;

[0058] Therefore, through the above formulas, it can be obtained that the length change amount of the muffler cavity 111 after reciprocating sliding in the length direction of the muffler body 1 is △x; the △x satisfies the following formula conditions:

[0059]

[0060] Therefore, the length change of the silencer cavity can be adjusted by the magnitude of the current I, and the magnitude of the electromagnetic force can be controlled by controlling the magnitude of the current in the coil 42. The greater the electromagnetic force, the shorter the length of the silencer cavity.

[0061] In this specific embodiment, in order to improve the sealing performance of the coil ring 41 on the muffler body 1 and avoid affecting the adjustment of the length change of the muffler cavity, a first sealing rubber ring 5 is provided between the coil ring 41 and the muffler body 1 .

[0062] A second sealing rubber ring 6 is provided between the baffle 31 and the muffler body 1; an introduction transition pipe 7 connected to the coil ring 41 and communicating with the muffler cavity 111 is sleeved on the inlet end of the muffler body 1. The second sealing rubber ring 6 is provided to enhance the sealing between the baffle 31 and the muffler body 1, and to prevent the refrigerant from entering the cavity 11 where the spring is placed, which affects the adjustment of the length of the muffler cavity 111.

[0063] An outlet transition pipe 8 is sleeved on the outlet end of the muffler body 1; the other end of the drainage pipe 32 is nested in the outlet transition pipe 8; a third sealing rubber ring 9 is provided between the other end of the drainage pipe 32 and the outlet transition pipe 8 to enhance the sealing performance at the outlet end of the muffler body 1 and prevent outside air from entering the cavity 11 and affecting the adjustment of the length of the muffler cavity 111.

[0064] The present invention also discloses a variable frequency air conditioner, which includes the above-mentioned length-adjustable silencer. The variable frequency air conditioner also includes a common body and a frequency converter. The variable frequency air conditioner solves the problem of air-conditioning transmission sound caused by the compressor through the length-adjustable silencer, and has a simple structure, high reliability, stronger versatility, and a wider range of adaptability. At the same time, the length-adjustable silencer uses the driving component 4 to generate the size of the electromagnetic force, adjusts the baffle structure 3 to slide back and forth along the length direction of the silencer body 1, and realizes the adjustment of the length of the silencer chamber 111 to meet the silencing requirements of different frequency points. The structure is simple, easy to use and reliable, which is conducive to the large-scale application of the product.

[0065] Embodiment 2:

[0066] In this specific embodiment 2, the length-adjustable muffler of this embodiment is basically the same as that of embodiment 1, except that the baffle driving device 24 includes a force sensor disposed in the muffler chamber and a driving mechanism connected to the baffle structure 3. The force sensor senses the pressure change in the muffler chamber 111 and gives feedback, and then the driving mechanism drives the baffle structure 3 to move according to the feedback of the force sensor to adjust the length of the muffler chamber 111 to meet the muffler requirements at different frequency points. The structure is simple, convenient and reliable to use, and is conducive to large-scale application of the product. The driving mechanism is a cylinder or an electric cylinder.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present application.

Claims

1. A length-adjustable silencer, comprising a silencer body, wherein the silencer body has a cavity with two ends connected, characterized in that: The adjustable length silencer comprises: a baffle driving device, which is disposed in the cavity; a baffle structure, which is slidably connected to the cavity and connected to the baffle driving device, and is in communication with both ends of the muffler body; the cavity includes a muffler cavity located between the baffle structure and the inlet end of the muffler body; The baffle driving device comprises: an elastic component, one end of which is connected to the cavity, and the other end is connected to the baffle structure, and slides synchronously with the baffle structure to extend and contract; a driving component, which is located in the cavity and is used to generate electromagnetic force to drive and adjust the baffle structure to slide back and forth along the length direction of the muffler body to change the length of the muffler cavity; The length-adjustable silencer determines the refrigerant pressure of the refrigerant entering the silencer cavity and the duration of the refrigerant pressure in the silencer cavity at each frequency generated by the variable frequency air conditioner; drives the baffle structure to move in the silencer cavity through a driving force according to the refrigerant pressure, and adjusts the length of the silencer cavity to eliminate the transmission sound problem generated by the variable frequency air conditioner; after the baffle structure slides back and forth in the length direction of the silencer body, the length change of the silencer cavity is △x; and △x satisfies the following formula conditions: ； Among them, P is the refrigerant pressure in the muffler, S is the cross-sectional area of ​​the left end of the baffle structure, B is the magnetic induction intensity, L is the effective length of the coil, I is the current intensity, g is the acceleration of gravity, and k is the spring stiffness coefficient.

2. The length-adjustable silencer according to claim 1, characterized in that: The driving force includes electromagnetic force and elastic force.

3. The length-adjustable silencer according to claim 2, characterized in that: The electromagnetic force is generated by changing the coil current.

4. The length-adjustable silencer according to claim 1, characterized in that: The drive assembly comprises: A coil ring, which is arranged in the left end of the muffler cavity; A first sealing rubber ring, which is arranged between the coil ring and the muffler body; A coil, which is sleeved on the coil ring; The magnetic conductor is arranged on the baffle structure and slides synchronously with the baffle structure along the length direction of the muffler body, and acts with the electromagnetic force generated by the coil to adjust the baffle structure to slide back and forth along the length direction of the muffler body.

5. The length-adjustable silencer according to claim 1, characterized in that: The elastic component is a spring.

6. The length-adjustable silencer according to claim 4, characterized in that: The baffle structure comprises: A baffle, which is slidably connected in the cavity and connected to the elastic component, and reciprocates along the length direction of the muffler body; The drainage pipe has one end arranged on the baffle plate and communicated with the two ends of the muffler body, and slides back and forth along the length direction of the muffler body along with the baffle plate.

7. The length-adjustable silencer according to claim 6, characterized in that: A second sealing rubber ring is provided between the baffle and the muffler body; an inlet transition pipe connected to the coil ring and communicated with the muffler chamber is sleeved on the inlet end of the muffler body; an outlet transition pipe is sleeved on the outlet end of the muffler body; the other end of the drainage pipe is nested in the outlet transition pipe; a third sealing rubber ring is provided between the other end of the drainage pipe and the outlet transition pipe.

8. A variable frequency air conditioner, characterized in that: A length-adjustable silencer comprising the length-adjustable silencer as described in any one of claims 1 to 7.

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