Silencing device and air conditioner

Abstract

The utility model discloses a silencer and an air conditioner. The silencing device is applied to the air conditioner, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and a compressor, the inlet end of the silencing device is communicated with the exhaust end of the compressor, the outlet end of the silencing device is connected with the four-way valve, and the silencing device comprises at least two silencing branches. Each silencing branch is correspondingly provided with a silencer, and the connection relation between different silencers can be changed; and the controller is used for controlling the connection relationship between different silencers in the silencing device, so that the silencing parameters of the silencing device are changed, and the silencing amount of the silencing device is changed. By means of the air conditioner, noise of different frequencies can be reduced, the noise between the indoor part and the outdoor part of the air conditioner can meet the noise requirement, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise control, and in particular, to a silencing device and an air conditioner. Background Art

[0002] With the development of the economy, people's requirements for the quality of life are getting higher and higher. In many installation occasions, air conditioners need to be equipped with long connecting pipes of 20m, 50m or even longer, and additional refrigerant needs to be added. Due to the difference in the additional refrigerant volume, the pressure difference of the air-conditioning system is caused, and due to the individual difference of the compressor, the refrigerant pulsating unit will emit noises of different frequencies. It is very difficult to test all the noise problems during the development stage. Therefore, after the air conditioner is installed at the client side, the air conditioner often generates unpleasant noise problems. In the prior art, by setting a silencing device to reduce noise, the silencing parameters of the silencing device are fixed and can only weaken the noise of a certain frequency or a certain frequency band. However, the frequency of the noise is uncertain, so the silencing effect is poor at other frequencies except for specific frequencies.

[0003] Aiming at the problem that the silencing parameters of the silencing device in the air conditioner in the prior art are fixed and cannot be adaptively adjusted according to the noise frequency, resulting in poor silencing effect, no effective solution has been proposed yet. Summary of the Utility Model

[0004] An embodiment of the utility model provides a silencing device and an air conditioner to solve the problem that the silencing parameters of the silencing device in the air conditioner in the prior art are fixed and cannot be adaptively adjusted according to the noise frequency, resulting in poor silencing effect.

[0005] To solve the above technical problem, the utility model provides a silencing device applied to an air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and a compressor. The inlet end of the silencing device is communicated with the exhaust end of the compressor, and the outlet end thereof is connected to the four-way valve. The silencing device includes at least two silencing branches, and a silencer is correspondingly arranged on each silencing branch, and the connection relationship between different silencers can be changed;

[0006] A controller is used to control the connection relationship between different silencers in the silencing device, thereby changing the silencing parameters of the silencing device to change the silencing volume of the silencing device.

[0007] Furthermore, the silencing branch includes:

[0008] A first valve arranged on the inlet pipeline of the silencing branch;

[0009] A second valve arranged on the outlet pipeline of the silencing branch;

[0010] The third valve is arranged between the outlet pipeline of each silencing branch and the inlet pipeline of any other silencing branch.

[0011] Further, the third valve is a one-way valve.

[0012] Further, the silencer includes:

[0013] An expansion chamber; its inlet end is communicated with the inlet pipeline of the silencing branch, and its outlet end is communicated with the outlet pipeline of the silencing branch;

[0014] Wherein, the cross-sectional area of the expansion chamber is larger than the cross-sectional areas of the inlet pipeline and the outlet pipeline of the silencing branch.

[0015] Further, the silencing parameters include: an equivalent expansion ratio and an equivalent expansion chamber length;

[0016] Wherein, the equivalent expansion ratio is the equivalent value of the expansion ratios of all the silencers participating in operation; the expansion ratio is the ratio of the cross-sectional area of the expansion chamber of the silencer to the cross-sectional area of the inlet pipeline; the equivalent expansion chamber length is the total length of all the silencers participating in operation.

[0017] Further, the expansion ratios of different silencers of the silencing device are different.

[0018] The present utility model further provides an air conditioner, including the above silencing device.

[0019] Applying the technical solution of the present utility model, a silencing device is provided, which includes at least two silencing branches, and a silencer is correspondingly arranged on each silencing branch, and the connection relationship between different silencers can be changed; the connection relationship between different silencers in the silencing device is controlled by a controller, so as to change the silencing parameters of the silencing device, and thus change the silencing volume of the silencing device. Since the silencing volume is related to the frequency of the noise, the length of the expansion chamber of the silencer, and the expansion ratio of the silencer, according to different noise frequencies, by changing the connection relationship between different silencers, that is, connecting different silencers in series, in parallel or in series-parallel, the silencing parameters of the silencing device can be changed by changing the connection relationship of different silencers, and thus the silencing volume can be changed, so as to perform silencing on noises of different frequencies, make the noise between the indoor part and the outdoor part of the air conditioner meet the noise requirements, and improve the user experience. Description of the Drawings

[0020] Figure 1 It is a structural diagram of an air conditioner according to an embodiment of the present utility model;

[0021] Figure 2 It is a structural diagram of a silencing device according to an embodiment of the present utility model;

[0022] Figure 3 Structural diagram of a sound insulation device according to another embodiment of the present utility model;

[0023] Figure 4 Internal structural diagram of a muffler according to an embodiment of the present utility model. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The terms used in the embodiments of the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The singular forms of "a", "the" and "said" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0026] It should be understood that the term "and / or" used herein is only an associative relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0027] It should be understood that although terms such as first, second, and third may be used to describe valves in the embodiments of the present utility model, these valves should not be limited to these terms. These terms are only used to distinguish valves disposed at different positions. For example, without departing from the scope of the embodiments of the present utility model, the first valve may also be referred to as the second valve, and similarly, the second valve may also be referred to as the first valve.

[0028] Depending on the context, the words "if" and "when" as used herein may be interpreted as "when...", "when...", "in response to determining", or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" may be interpreted as "when determined", "in response to determining", "when detecting (stated condition or event)", or "in response to detecting (stated condition or event)".

[0029] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such commodity or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the commodity or device comprising said element.

[0030] The optional embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0031] Embodiment 1

[0032] After the air conditioner is installed at the client, the air conditioner often produces unpleasant noise problems. In the prior art, by setting a sound insulation device to reduce the noise, the sound insulation parameters of the sound insulation device are fixed and can only have a weakening effect on the noise of a certain frequency or a certain frequency band. However, the frequency of the noise is uncertain, so the sound insulation effect is poor at other frequencies except for the specific frequency.

[0033] Aiming at the problem that the sound insulation parameters of the sound insulation device in the air conditioner in the prior art are fixed and cannot be adjusted adaptively according to the noise frequency, resulting in poor sound insulation effect, this embodiment provides a sound insulation device applied to the air conditioner. Figure 1 For the structural diagram of the air conditioner according to the embodiment of the present utility model, as Figure 1 shown, the air conditioner includes an indoor heat exchanger 1, an outdoor heat exchanger (not shown in the figure, the component connected by the large valve and the small valve in the figure), a four-way valve 4 and a compressor 3. The indoor heat exchanger is connected to the outdoor heat exchanger through a throttle valve 2. The outdoor heat exchanger is connected to the first interface E of the four-way valve. The second interface S of the four-way valve is connected to the suction end of the compressor. The third interface C of the low-pass valve is connected to the indoor heat exchanger. The fourth interface D of the four-way valve is connected to the discharge end of the compressor. The sound insulation device is arranged between the four-way valve and the discharge port of the compressor, its inlet end is connected to the discharge end of the compressor, and its outlet end is connected to the four-way valve.

[0034] Figure 2 For the structural diagram of the sound insulation device according to the embodiment of the present utility model, as Figure 2 shown, the sound insulation device includes at least two sound insulation branches. Figure 2 Taking the number of sound insulation branches as three as an example, in practical applications, the number of sound insulation branches is at least two. A sound insulator is correspondingly arranged on each sound insulation branch, and the connection relationship between different sound insulators can be changed; a controller (not shown in the figure) is used to control the connection relationship between different sound insulators in the sound insulation device, thereby changing the sound insulation parameters of the sound insulation device to change the sound insulation volume of the sound insulation device.

[0035] The sound silencing device of this embodiment includes at least two sound silencing branches, and a sound silencer is correspondingly arranged on each sound silencing branch. The connection relationship between different sound silencers can be changed. The connection relationship between different sound silencers in the sound silencing device is controlled by a controller, so as to change the sound silencing parameters of the sound silencing device and thus change the sound silencing volume of the sound silencing device. Since the sound silencing volume is related to the frequency of the noise, the length of the expansion chamber of the sound silencer, and the expansion ratio of the sound silencer, according to different noise frequencies, by changing the connection relationship between different sound silencers, that is, connecting different sound silencers in series, parallel, or series-parallel, the sound silencing parameters of the sound silencing device can be changed through the change of the connection relationship between different sound silencers, and then the sound silencing volume can be changed, so as to silence different frequencies of noise, make the noise between the indoor part and the outdoor part of the air conditioner meet the noise requirements, and improve the user experience.

[0036] As Figure 2 shown, in order to achieve more connection relationship changes such as series, parallel, and series-parallel, each sound silencing branch includes: a first valve arranged on the inlet pipeline of each sound silencing branch; a second valve arranged on the outlet pipeline of each sound silencing branch; and a third valve arranged between the outlet pipeline of each sound silencing branch and the inlet pipeline of any other sound silencing branch.

[0037] For the convenience of description, the first valves of the three sound silencing branches mentioned above Figure 2 are respectively marked as control valves 21, 22, and 23, the second valves of the three sound silencing branches are respectively marked as control valves 24, 25, and 26, and the two third valves are respectively named control valves 27 and 28.

[0038] As Figure 2 shown, the three sound silencing branches are the first sound silencing branch, the second sound silencing branch, and the third sound silencing branch from left to right in sequence, and the corresponding sound silencers are the first sound silencer, the second sound silencer, and the third sound silencer. When control valves 23, 24, 27, and 28 are opened and control valves 21, 22, 25, and 26 are closed, the three sound silencers can be connected in series; when control valves 22, 24, and 27 are opened and control valves 21, 23, 25, 26, and 28 are closed, the first sound silencer and the second sound silencer can be connected in series. When control valves 23, 25, and 28 are opened and control valves 21, 22, 24, 26, and 27 are closed, the second sound silencer and the third sound silencer can be connected in series.

[0039] When all of control valves 21, 22, 23, 24, 25, and 26 are opened and control valves 27 and 28 are closed, the three sound silencers can be connected in parallel.

[0040] When control valves 21, 22, 24, and 25 are opened and control valves 23, 26, 27, and 28 are closed, the first sound silencer and the second sound silencer can be connected in parallel.

[0041] When the control valves 22, 23, 25, 26 are opened and the control valves 21, 24, 27, 28 are closed, the second muffler and the third muffler can be connected in parallel.

[0042] Connecting multiple mufflers in series or in series-parallel changes the expansion ratio of the mufflers, which can eliminate noises of different frequencies.

[0043] For example, in the development of a certain air conditioner product, when there is no muffler in the outdoor unit pipeline, there are obvious two peaks of noise in the outdoor unit spectrum: around 100 Hz and 600 Hz, with relatively high peaks and poor experience effect. According to the formula mentioned above, the silencing frequency depends on the length and expansion ratio of the expansion chamber of the muffler. If only one muffler is set, it can only eliminate one of 100 Hz or 600 Hz and cannot completely eliminate the noise.

[0044] The muffling device of the present utility model is assembled in the outdoor unit with a fixed box. The inlet end is connected to the compressor exhaust port, and the outlet end is connected to the four-way valve. For example, after selection, the first muffler (inlet pipeline diameter r1 = 5 mm, expansion chamber diameter r2 = 25 mm, expansion chamber length L = 200 mm) can eliminate noises of 100 - 150 Hz, the muffler 2 (inlet pipeline diameter r1 = 5 mm, expansion chamber diameter r2 = 40 mm, expansion chamber length L = 120 mm) can eliminate noises of 200 - 250 Hz, and the muffler 3 (inlet pipeline diameter r1 = 5 mm, expansion chamber diameter r2 = 50 mm, expansion chamber length L = 100 mm) can eliminate noises of 500 - 600 Hz; the control valve plays a role of a switch. By debugging the control valve and the one-way valve, any two or three of the first muffler, the second muffler, and the third muffler can be connected in series or in parallel, and noises in multiple frequency bands can be eliminated in various combination ways.

[0045] Figure 3 As shown in the structural diagram of the muffling device according to another embodiment of the present utility model, the function of setting the third valve is to connect different mufflers in series. The third valve can be an electronic valve and is controlled by a controller. However, the cost of the electronic valve is relatively high, and when there are more muffling branches, the resources of the controller required to control the third valve are relatively large. To solve this problem and achieve the effect of connecting the mufflers in series at the same time, as Figure 3 shown, the third valve is a one-way valve.

[0046] For the sake of convenience of description, the first valves of the three muffling branches mentioned above Figure 3 are respectively marked as control valves 31, 32, 33, the second valves of the three muffling branches are respectively marked as control valves 34, 35, 36, and the two one-way valves are respectively named the first one-way valve 37 and the second one-way valve 38.

[0047] AsFigure 3 As shown, the three muffling branches are the first muffling branch, the second muffling branch, and the third muffling branch from left to right. The corresponding mufflers are the first muffler, the second muffler, and the third muffler respectively. When the control valves 33 and 34 are opened and the control valves 31, 32, 35, and 36 are closed, refrigerant flows through both the first check valve 37 and the second check valve 38, and the three mufflers can be connected in series. When the control valves 32 and 34 are opened and the control valves 31, 33, 35, and 36 are closed, refrigerant flows through the first check valve 37, and the first muffler and the second muffler can be connected in series. When the control valves 33 and 35 are opened and the control valves 31, 32, 34, and 36 are closed, the second muffler and the third muffler can be connected in series, and refrigerant flows through the second check valve 38.

[0048] When all the control valves 31, 32, 33, 34, 35, and 36 are opened, refrigerant flows through both the first check valve 37 and the second check valve 38, and the three mufflers can be connected in series and in parallel, that is, part of the refrigerant passes through the three mufflers in sequence. For this part of the refrigerant, the relationship between the three mufflers is series connection. Part of the refrigerant passes through two mufflers in sequence. For this part of the refrigerant, the relationship between the two mufflers is series connection. For another part of the refrigerant, it is divided into three branches and flows through the three mufflers respectively. For this part of the refrigerant, the connection relationship of the three mufflers is parallel connection.

[0049] When the control valves 31, 32, 34, and 35 are opened and the control valves 33 and 36 are closed, refrigerant flows through the first check valve 37, and the first muffler and the second muffler can be connected in series and in parallel, that is, after the refrigerant passes through the second muffler, part of it enters the second muffler. For this part of the refrigerant, the connection relationship between the first muffler and the second muffler is series connection; another part of the refrigerant enters the first muffler and the second muffler separately. For this part of the refrigerant, the connection relationship between the first muffler and the second muffler is parallel connection.

[0050] When the control valves 32, 33, 35, and 36 are opened and the control valves 31 and 34 are closed, refrigerant flows through the second check valve 38, and the second muffler and the third muffler can be connected in series and in parallel. After the refrigerant passes through the third muffler, part of it enters the third muffler. For this part of the refrigerant, the connection relationship between the third muffler and the second muffler is series connection; another part of the refrigerant enters the third muffler and the second muffler separately. For this part of the refrigerant, the connection relationship between the third muffler and the second muffler is parallel connection.

[0051] Connecting multiple mufflers in series or in series and in parallel changes the expansion ratio of the mufflers and can eliminate noises of different frequencies.

[0052] Figure 4The following is the internal structure diagram of a muffler according to an embodiment of the present utility model. Since noise is generated by the flow of refrigerant and propagates in the pipeline along the direction of refrigerant flow, if the diameter of the pipeline suddenly becomes larger, sound waves of some frequencies are reflected and cannot continue to propagate in the pipeline, thus achieving the purpose of noise reduction. Therefore, in order to eliminate noise of some frequencies, such as Figure 4 As shown, the above muffler includes: an expansion chamber; its inlet end is connected to the inlet pipeline of the muffling branch, and its outlet end is connected to the outlet pipeline of the muffling branch; wherein, the cross-sectional area of the expansion chamber is larger than the cross-sectional area of the inlet pipeline and the cross-sectional area of the outlet pipeline of the muffling branch.

[0053] The cross-sectional area of the connecting pipe is S1; the cross-sectional area of the expansion type is S2, the effective length of the expansion chamber of the muffler is L, and the theoretical noise reduction volume Δl of the muffler follows the following calculation formula:

[0054]

[0055] Wherein, in the formula: m is the expansion ratio, which is equal to the ratio of the cross-sectional area of the expansion chamber to the cross-sectional area of the inlet pipeline, that is, S2 / S1, k is the wave number of the sound wave, and k = 2πf / c. f is the noise reduction frequency, and c is the sound propagation speed of the medium.

[0056] It can be known from the above formula that the parameters affecting the noise reduction effect, in addition to the frequency of the noise, also include some structural parameters of the muffler, including the expansion ratio and the length of the expansion chamber. The expansion ratio is the ratio of the cross-sectional area of the expansion chamber of the muffler to the cross-sectional area of the inlet pipeline. If multiple mufflers are connected in series, in parallel, or in series-parallel, then the noise reduction volume is related to the parameters of the noise reduction device composed of multiple mufflers. The above noise reduction parameters include: the equivalent expansion ratio and the equivalent expansion chamber length. Among them, the equivalent expansion ratio is the equivalent value of the expansion ratios of all mufflers participating in the operation; the equivalent expansion chamber length is the total length of all mufflers participating in the operation.

[0057] Suppose the length of the expansion chamber of a muffler is L1, the cross-sectional area of the expansion chamber is S2, the cross-sectional area of the inlet pipeline is S1, and its expansion ratio m1 = S2 / S1. The length of the expansion chamber of another muffler is L2, the cross-sectional area of the expansion chamber is S4, the cross-sectional area of the inlet pipeline is S3, and its expansion ratio m2 = S4 / S3. Then, if these two mufflers are connected in series, it is equivalent to lengthening the length of the muffler, and the equivalent expansion chamber length is the total length of the two mufflers: L1 + L2; if these two mufflers are connected in parallel, it is equivalent to thickening both the cross-sectional area of the inlet pipeline and the expansion chamber, and the equivalent expansion ratio m3 = (S2 + S4) / (S1 + S3).

[0058] According to the above formula, on the one hand, since the noise reduction volume is positively correlated with the length of the expansion chamber within a certain range, in some embodiments of the present invention, different mufflers can be connected in series to increase the equivalent length of the expansion chamber, thereby increasing the noise reduction volume of the noise reduction device; on the other hand, since the noise reduction volume is positively correlated with the expansion ratio within a certain range, in some embodiments of the present invention, different mufflers can be connected in parallel to increase the equivalent length of the expansion chamber, thereby increasing the noise reduction volume of the noise reduction device. However, if the expansion ratios of the different mufflers connected in parallel are the same, for example, the above S4 / S3 = S2 / S1, then the equivalent expansion ratio m3 after the two mufflers are connected in parallel is m3=(S2 + S4) / (S1 + S3)=S4 / S3 = S2 / S1, that is, m3 = m2 = m1. The equivalent expansion ratio of the two mufflers connected in parallel is the same as that of one muffler, and the noise reduction volume will not change. Therefore, if it is necessary to ensure that the equivalent expansion ratio changes after different mufflers are connected in parallel, it is necessary to ensure that the expansion ratios of different mufflers are different. Therefore, the expansion ratios of different mufflers of the noise reduction device are set to be different.

[0059] Embodiment 2

[0060] This embodiment provides an air conditioner, including the noise reduction device of the above embodiment, which is used to change the connection relationship between different mufflers, that is, to connect different mufflers in series, in parallel or in series-parallel. It can change the noise reduction parameters of the noise reduction device through the change of the connection relationship of different mufflers, and then change the noise reduction volume, so that the noise between the indoor part and the outdoor part of the air conditioner meets the noise requirements and improves the user experience.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A silencing device is applied to an air conditioner, and the air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, and a compressor. It is characterized in that The silencing device has its inlet end connected to the exhaust end of the compressor and its outlet end connected to the four-way valve. The silencing device includes at least two silencing branches, and a silencer is correspondingly arranged on each silencing branch. The connection relationship between different silencers can be changed; A controller is used to control the connection relationship between different silencers in the silencing device, thereby changing the silencing parameters of the silencing device to change the silencing volume of the silencing device.

2. The sound insulation device according to claim 1, wherein, The silencing branch includes: A first valve is arranged on the inlet pipeline of the silencing branch; A second valve is arranged on the outlet pipeline of the silencing branch; A third valve is arranged between the outlet pipeline of each silencing branch and the inlet pipeline of any other silencing branch.

3. The sound insulation device according to claim 2, wherein The third valve is a one-way valve.

4. The sound deadening device according to claim 2, characterized in that, The silencer includes: An expansion chamber; its inlet end is connected to the inlet pipeline of the silencing branch, and its outlet end is connected to the outlet pipeline of the silencing branch; Among them, the cross-sectional area of the expansion chamber is larger than the cross-sectional area of the inlet pipeline and the cross-sectional area of the outlet pipeline of the silencing branch.

5. The silencing device according to claim 4, wherein, The silencing parameters include: an equivalent expansion ratio and an equivalent expansion chamber length; Among them, the equivalent expansion ratio is the equivalent value of the expansion ratios of all the silencers participating in operation; the expansion ratio is the ratio of the cross-sectional area of the expansion chamber of the silencer to the cross-sectional area of the inlet pipeline; the equivalent expansion chamber length is the total length of all the silencers participating in operation.

6. The sound insulation device according to claim 5, characterized in that, The expansion ratios of different silencers of the silencing device are different.

7. An air conditioner, characterized in that, Including the silencing device according to any one of claims 1 to 6.

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