Air conditioner and noise reduction device thereof

Abstract

The noise reduction device comprises a connecting pipe, a noise reduction module and a pipe fitting connecting assembly, the connecting pipe is connected to the downstream of a throttling device of the air conditioner, and the noise reduction module is installed in an inner cavity of the connecting pipe; the periphery of the noise reduction module is attached to the inner wall of the connecting pipe in the circumferential direction and can slide out of the connecting pipe. A flow guide cavity communicated with an inner cavity of the connecting pipe and the fluid main pipeline is formed in the pipe fitting connecting assembly, and the pipe fitting connecting assembly is detachably connected with the connecting pipe. According to the noise reduction device provided by the utility model, the noise reduction module is arranged in the inner cavity of the connecting pipe, so that when the fluid passes through the connecting pipe, noise reduction is performed under the action of the noise reduction module. The periphery of the noise reduction module is attached to the inner wall of the connecting pipe in the circumferential direction and can slide out of the connecting pipe, and the pipe fitting connecting assembly is detachably connected with the connecting pipe so that the noise reduction module can be replaced. Therefore, the noise reduction device provided by the invention reduces noise.

Description

TECHNICAL FIELD

[0001] The utility model relates to noise reduction equipment technical field, especially air conditioner and its noise reduction device. BACKGROUND

[0002] In the refrigerant circulation process of the air conditioner, the high-temperature and high-pressure liquid refrigerant at the outlet of the condenser is throttled and depressurized into low-temperature and low-pressure gas-liquid two-phase state refrigerant by a throttling device. Usually, the cross-sectional area of the refrigerant flow passage will change abruptly at the inlet and outlet of the throttling device (the inlet and outlet of the capillary tube, the inlet and outlet of the throttling short pipe, and the inlet and outlet of the valve port of the electronic expansion valve), and the refrigerant flow rate and pressure will change sharply, part of the liquid refrigerant will cavitate into gaseous refrigerant, and will gather into gas bubbles of different sizes. With the flow of the refrigerant and the pressure fluctuation, part of the large bubbles may collapse into several small bubbles, generating bubble collapse noise.

[0003] However, the high-frequency noise generated by the indoor unit of the air conditioner at the user end is mainly caused by the two-phase flow near the throttling device. The refrigerant flashes in the throttling device and at the inlet and outlet thereof, and is converted into gas-liquid two-phase flow, in which the gas usually flows in the pipe in the form of bubbles, and the two-phase flow is usually intermittent flow. The intermittent flow has large pressure fluctuation, and has large excitation effect on the refrigerant pipeline, and thus is more prone to generate vibration noise on the fluid main pipeline.

[0004] At the same time, the large bubbles flow in the fluid main pipeline, and due to the collision with the pipe wall and the pressure fluctuation and other factors, the bubbles will break and generate sharp and harsh noise.

[0005] Therefore, how to reduce the noise is a technical problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide an air conditioner and a noise reduction device thereof to reduce the noise.

[0007] The noise reduction device of the air conditioner provided in the application comprises:

[0008] A connecting pipe is connected to the downstream of the throttling device of the air conditioner.

[0009] A noise reduction module is installed in the inner cavity of the connecting pipe, and the outer periphery of the noise reduction module is circumferentially attached to the inner wall of the connecting pipe and can slide out of the connecting pipe.

[0010] A pipe fitting connecting assembly is provided with a flow guide cavity in communication with the inner cavity of the connecting pipe and the fluid main pipeline, and the pipe fitting connecting assembly is detachably connected to the connecting pipe.

[0011] Optionally, in the noise reduction device of the air conditioner, the pipe fitting connecting assembly comprises:

[0012] A first conduit is sleeved at one end of the connection pipe, and the other end is connected with the fluid main pipe.

[0013] A first locking member is detachably connected with the connection pipe, and a tapered surface of the first locking member is sleeved at the outer periphery of the first conduit, and the first conduit is clamped at the outer periphery of the connection pipe.

[0014] Optionally, in the noise reduction device of the air conditioner, the pipe connection assembly further comprises:

[0015] A second conduit is sleeved at one end of the connection pipe, and the other end is connected with the fluid main pipe.

[0016] A second locking member is detachably connected with the connection pipe, and a tapered surface of the second locking member is sleeved at the outer periphery of the second conduit, and the second conduit is clamped at the outer periphery of the connection pipe.

[0017] Optionally, in the noise reduction device of the air conditioner, further comprising a positioning block arranged on the outer wall of the connection pipe, the first locking member and the second locking member are located on opposite sides of the positioning block, and the first locking member and the second locking member are both threadedly connected with the connection pipe.

[0018] Optionally, in the noise reduction device of the air conditioner, the first conduit and the second conduit are flared pipes, and the first locking member and the second locking member are sodium joints.

[0019] The inner diameter of the connection pipe is greater than the inner diameter of one end of the first conduit away from the connection pipe, and the inner diameter of the connection pipe is greater than the inner diameter of one end of the second conduit away from the connection pipe.

[0020] Optionally, in the noise reduction device of the air conditioner, the noise reduction module is a porous material, and the two ends of the connection pipe are connected through the inside of the porous material.

[0021] An air conditioner comprises a throttling device, a noise reduction device and an evaporator arranged in sequence along the fluid flow direction of a fluid main pipe, and the noise reduction device is the noise reduction device of any one of the above.

[0022] Optionally, in the air conditioner, further comprising a first stop valve and a second stop valve, and the first stop valve and the second stop valve are arranged on the fluid main pipe at opposite ends of the connection pipe.

[0023] Optionally, in the air conditioner, an evacuation valve is further arranged on the fluid main pipeline between the first stop valve and the second stop valve.

[0024] Optionally, in the air conditioner, a pressure gauge and a flow meter are further arranged on the fluid main pipeline, and the pressure gauge and the flow meter are arranged on at least one side of the connecting pipe upstream or downstream.

[0025] In the technical scheme, the noise reduction device comprises a connecting pipe, a noise reduction module and a pipe fitting connecting assembly, the connecting pipe is connected downstream of a throttling device of an air conditioner, the noise reduction module is installed in an inner cavity of the connecting pipe, a periphery of the noise reduction module is circumferentially attached to an inner wall of the connecting pipe, and the noise reduction module can slide out of the connecting pipe, the pipe fitting connecting assembly is internally provided with a flow guide cavity in communication with the inner cavity of the connecting pipe and a fluid main pipeline, and the pipe fitting connecting assembly is detachably connected to the connecting pipe.

[0026] As can be seen from the above description, in the noise reduction device, the noise reduction module is arranged in the inner cavity of the connecting pipe, so that the fluid is reduced in noise under the action of the noise reduction module when passing through the connecting pipe. The periphery of the noise reduction module is circumferentially attached to the inner wall of the connecting pipe, and the noise reduction module can slide out of the connecting pipe. The pipe fitting connecting assembly is detachably connected to the connecting pipe to replace the noise reduction module. Therefore, the noise reduction device reduces noise. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0028] Fig. 1 The working principle schematic diagram of the air conditioner provided by the embodiments of the present application is shown in the figure.

[0029] Fig. 2 The structure schematic diagram of the noise reduction device provided by the embodiments of the present application is shown in the figure.

[0030] Fig. 3 The sectional view of the noise reduction device provided by the embodiments of the present application is shown in the figure.

[0031] Among them Figs. 1-3 In the figure:

[0032] 1-compressor, 2-condenser, 3-flow meter, 4-first pressure gauge, 5-first stop valve, 6-throttling device;

[0033] 7 - noise reduction device, 701 - connecting pipe, 702 - noise reduction module, 703 - first locking piece, 704 - second locking piece, 705 - first conduit, 706 - second conduit, 707 - positioning block;

[0034] 8 - second stop valve, 9 - second pressure gauge, 10 - evaporator; DETAILED DESCRIPTION

[0035] The core of the utility model is to provide an air conditioner and a noise reduction device thereof to reduce noise.

[0036] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model is further explained in detail below in combination with the drawings and embodiments.

[0037] Please refer to Figs. 1 to 3 .

[0038] In one specific embodiment, the noise reduction device of the air conditioner provided by the utility model embodiment comprises a connecting pipe 701, a noise reduction module 702 and a pipe fitting connecting assembly, and the connecting pipe 701 is connected to the downstream of the throttling device 6.

[0039] The noise reduction module 702 is installed in the inner cavity of the connecting pipe 701; the outer periphery of the noise reduction module 702 is circumferentially attached to the inner wall of the connecting pipe 701, and the noise reduction module 702 can slide out of the connecting pipe 701; specifically, the noise reduction module 702 can be soundproof cotton. In one specific embodiment, the noise reduction module 702 is a porous material, and the two ends of the connecting pipe 701 are connected through the inside of the porous material. The porous material forcibly disperses large-sized bubbles in the refrigerant, changes the flow state of the refrigerant from intermittent flow to continuous flow (foam flow), actively reduces the pressure fluctuation of the refrigerant and reduces the bubble rupture behavior, and finally achieves the purpose of reducing the sound pressure level and the annoyance degree of noise, that is, the large bubbles inside the two-phase refrigerant are actively controlled and forcibly dispersed by using the porous material, and the bubble group and the refrigerant pressure stable state of the two-phase refrigerant are maintained.

[0040] Specifically, the porous material includes but is not limited to foamed copper, foamed nickel and other foamed metals, and porous polytetrafluoroethylene material and other processed mechanisms. The porous material can be specifically in the form of a cylinder, and its diameter should be slightly larger than or equal to the inner diameter of the connecting pipe 701, and is in interference fit with the inner wall of the connecting pipe 701, so as to ensure that the porous material will not enter the connecting pipe 701 without passing through the porous material due to the impact of high-pressure refrigerant, thereby affecting the normal work of the air conditioning system.

[0041] The long-time high-pressure impact can change the noise reduction module 702 and affect the noise reduction effect. Meanwhile, if the working condition changes greatly, the porous material with fixed material, thickness and aperture cannot achieve satisfactory noise reduction effect. Therefore, the pipe connecting assembly is provided with a flow guide cavity in communication with the inner cavity of the connecting pipe 701 and the fluid main pipeline. The pipe connecting assembly is detachably connected with the connecting pipe 701. Specifically, the pipe connecting assembly is threadedly connected with the connecting pipe 701 and can be detached at any time to replace the internal noise reduction module 702. By selecting the noise reduction module 702 of the corresponding model according to the working condition, the noise reduction device 7 can adapt to the large range of changes in the working condition.

[0042] As described above, in the noise reduction device 7 provided in the embodiments of the present application, the noise reduction module 702 is arranged in the inner cavity of the connecting pipe 701, so that the fluid passing through the connecting pipe 701 is subjected to noise reduction under the action of the noise reduction module 702. The outer periphery of the noise reduction module 702 is circumferentially attached to the inner wall of the connecting pipe 701 and can slide out of the connecting pipe 701. The pipe connecting assembly is detachably connected with the connecting pipe 701 to replace the noise reduction module 702. Therefore, the noise reduction device 7 provided in the present application reduces noise.

[0043] In one embodiment, the pipe connecting assembly includes a first guide pipe 705 and a first locking member 703. One end of the first guide pipe 705 is sleeved on the liquid inlet end of the connecting pipe 701, and the other end is connected with the fluid main pipeline. The inner cavity of the one end of the first guide pipe 705 sleeved on the outer periphery of the connecting pipe 701 is expanded towards the connecting pipe 701. Specifically, the expansion of the first guide pipe 705 can be a tapered structure. The inner cavity of the first guide pipe 705 away from the connecting pipe 701 has the same diameter as the inner cavity of the connecting pipe 701.

[0044] The first locking member 703 is detachably connected with the connecting pipe 701. The tapered surface of the first locking member 703 is sleeved on the outer periphery of the first guide pipe 705. The first locking member 703 clamps the first guide pipe 705 on the outer periphery of the connecting pipe 701. Specifically, the first locking member 703 and the connecting pipe 701 can be connected by clamping, or the first locking member 703 is threadedly connected on the outer periphery of the connecting pipe 701.

[0045] In one embodiment, the pipe connecting assembly includes a second guide pipe 706 and a second locking member 704. One end of the second guide pipe 706 is sleeved on the liquid outlet end of the connecting pipe 701, and the other end is connected with the fluid main pipeline. The inner cavity of the one end of the second guide pipe 706 sleeved on the outer periphery of the connecting pipe 701 is expanded towards the connecting pipe 701. Specifically, the expansion of the second guide pipe 706 can be a tapered structure. The inner cavity of the second guide pipe 706 away from the connecting pipe 701 has the same diameter as the inner cavity of the connecting pipe 701.

[0046] The second locking member 704 is detachably connected with the connecting pipe 701, a tapered surface of the second locking member 704 is sleeved on the outer periphery of the second conduit 706, and the second conduit 706 is clamped on the outer periphery of the connecting pipe 701. Specifically, the second locking member 704 can be connected with the connecting pipe 701 through clamping. Alternatively, the second locking member 704 is threadedly connected with the outer periphery of the connecting pipe 701.

[0047] In a specific embodiment, the noise reduction device 7 further comprises a positioning block 707 arranged on the outer wall of the connecting pipe 701, the first locking member 703 and the second locking member 704 are located on opposite sides of the positioning block 707, and the first locking member 703 and the second locking member 704 are both threadedly connected with the connecting pipe 701.

[0048] In a specific embodiment, the first conduit 705 and the second conduit 706 are flared pipes, and the first locking member 703 and the second locking member 704 are nipple joints. Specifically, the nipple joint can be a copper nipple for air conditioning, and the first conduit 705, the second conduit 706, the first locking member 703 and the second locking member 704 are standard parts. The nipple joint and the flared pipe are threadedly connected.

[0049] The first conduit 705 is in interference fit with the first locking member 703, and the second conduit 706 is in interference fit with the second locking member 704, thereby improving the sealing performance of the connection.

[0050] Specifically, the inner diameter of the connecting pipe 701 is greater than the inner diameter of the first conduit 705 away from the connecting pipe 701, and the inner diameter of the connecting pipe 701 is greater than the inner diameter of the second conduit 706 away from the connecting pipe 701. The first conduit 705 and the second conduit 706 adopt a flared structure to achieve extrusion fit with the first locking member 703 and the second locking member 704.

[0051] The noise reduction device 7 provided by the present application has the advantages of small size, low cost, simple operation, safety and reliability, simple structure, safety and reliability. When applied to an air conditioner, it actively interferes with the flow pattern of the two-phase refrigerant, effectively reduces the high-frequency flow-induced noise on the user side while ensuring the refrigerant pressure drop and the air conditioning capacity, and improves the user's comfort and reputation.

[0052] The air conditioner provided by the present application comprises a noise reduction device, a compressor 1, a condenser 2, an evaporator 10 and the like, wherein the noise reduction device is any one of the above-mentioned noise reduction devices 7. The specific structure of the noise reduction device 7 is described in the foregoing, and the present application comprises the noise reduction device 7, which also has the above-mentioned technical effects. The throttling device 6, the noise reduction device and the evaporator 10 are sequentially arranged along the fluid flow direction in the main fluid pipeline.

[0053] In one embodiment, the air conditioner further comprises a first stop valve 5 and a second stop valve 8, which are arranged on the fluid main pipeline at opposite ends of the connecting pipe 701. The first stop valve 5 and the second stop valve 8 are used to block the fluid main pipeline at opposite ends of the connecting pipe 701 when the porous material is disassembled and replaced, i.e. the first stop valve 5 and the second stop valve 8 at both ends should be kept closed when disassembled, so as to ensure that most of the refrigerant remains in the air conditioning system, and only the refrigerant in the middle part of the first stop valve 5 and the second stop valve 8 leaks, so as to achieve the purpose of saving refrigerant and protecting the environment.

[0054] In one embodiment, the air conditioner further comprises an evacuation valve, which is arranged on the fluid main pipeline between the first stop valve 5 and the second stop valve 8. Specifically, when adding or replacing the porous material, the first stop valve 5 and the second stop valve 8 on both sides should be ensured to be in the closed state. Then the first locking member 703 on one side of the connecting pipe 701 is loosened, and after the internal refrigerant is completely vaporized, the first locking member 703 and the second locking member 704 are completely unscrewed. The noise reduction module 702 to be replaced is pushed out from one side, and the replaced noise reduction module 702 is pushed into the middle position of the connecting pipe 701. Finally, the first locking member and the second locking member 704 on both sides of the connecting pipe 701 are tightened, the air in the noise reduction device 7 is evacuated through the evacuation valve, air is prevented from entering the refrigerant circulation system, the capacity of the air conditioner is ensured, and finally the first stop valve 5 and the second stop valve 8 can be opened to work.

[0055] In one embodiment, the air conditioner further comprises a pressure gauge, at least one side of the upstream or downstream of the connecting pipe 701 is provided with a pressure gauge. As shown in the figure, one of the upstream and downstream of the connecting pipe 701 is provided with a first pressure gauge 4, and the other is provided with a second pressure gauge 9. The pressure of the refrigerant before and after adding or replacing the noise reduction module 702 is monitored through the pressure gauge. Fig. 1

[0056] In one embodiment, the air conditioner further comprises a flow meter 3, at least one side of the upstream or downstream of the connecting pipe 701 is provided with a flow meter 3. The flow meter 3 is used to monitor the flow change before and after adding or replacing the noise reduction module 702. Since the pressure loss after adding the noise reduction module 702 is too large, it will affect the performance of the air conditioning system. By monitoring the pressure and flow, the noise reduction module 702 is adjusted to ensure the capacity of the air conditioner while reducing noise.

[0057] In the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0058] ​The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A noise reduction device for an air conditioner, characterized in that, include: A connecting pipe (701) is connected downstream of the throttling device (6) of the air conditioner; A noise reduction module (702) is installed in the inner cavity of the connecting pipe (701); the outer periphery of the noise reduction module (702) is circumferentially fitted with the inner wall of the connecting pipe (701), and can slide out of the connecting pipe (701); A pipe fitting connection assembly is provided, wherein the pipe fitting connection assembly has a flow guide cavity that communicates with the inner cavity of the connecting pipe (701) and the main fluid pipeline, and the pipe fitting connection assembly is detachably connected to the connecting pipe (701).

2. The noise reduction device for an air conditioner according to claim 1, characterized in that, The pipe fitting connection assembly includes: The first conduit (705) has one end sleeved on the inlet end of the connecting pipe (701) and the other end connected to the fluid main pipeline. The first conduit (705) is sleeved on one end of the outer periphery of the connecting pipe (701) and the inner cavity is flared towards the connecting pipe (701). The first locking member (703) is detachably connected to the connecting pipe (701). The tapered surface of the first locking member (703) is sleeved on the outer periphery of the first conduit (705) and clamps the first conduit (705) onto the outer periphery of the connecting pipe (701).

3. The noise reduction device for an air conditioner according to claim 2, characterized in that, The pipe fitting connection assembly further includes: The second conduit (706) has one end sleeved on the liquid outlet end of the connecting tube (701) and the other end connected to the main fluid pipeline. The inner cavity of the end of the second conduit (706) sleeved on the outer periphery of the connecting tube (701) is flared towards the connecting tube (701). The second locking member (704) is detachably connected to the connecting pipe (701). The tapered surface of the second locking member (704) is sleeved on the outer periphery of the second conduit (706) and engages the second conduit (706) with the outer periphery of the connecting pipe (701).

4. The noise reduction device for an air conditioner according to claim 3, characterized in that, It also includes a positioning block (707) disposed on the outer wall of the connecting pipe (701), the first locking member (703) and the second locking member (704) are located on opposite sides of the positioning block (707), and both the first locking member (703) and the second locking member (704) are threadedly connected to the connecting pipe (701).

5. The noise reduction device for an air conditioner according to claim 3, characterized in that, The first conduit (705) and the second conduit (706) are flared tubes, and the first locking member (703) and the second locking member (704) are ferrule connectors; The inner diameter of the connecting tube (701) is greater than the inner diameter of the end of the first conduit (705) away from the connecting tube (701), and the inner diameter of the connecting tube (701) is greater than the inner diameter of the end of the second conduit (706) away from the connecting tube (701).

6. The noise reduction device for an air conditioner according to any one of claims 1-5, characterized in that, The noise reduction module (702) is made of porous material, and the two ends of the connecting pipe (701) are connected through the interior of the porous material.

7. An air conditioner, characterized in that, The device includes a throttling device (6), a noise reduction device, and an evaporator (10) arranged sequentially along the fluid flow direction in the main fluid pipeline, wherein the noise reduction device is the noise reduction device of the air conditioner according to any one of claims 1-6.

8. The air conditioner according to claim 7, characterized in that, It also includes a first shut-off valve (5) and a second shut-off valve (8), which are disposed on the fluid main pipelines at opposite ends of the connecting pipe (701).

9. The air conditioner according to claim 8, characterized in that, It also includes a vacuum valve, which is located on the main fluid line between the first shut-off valve (5) and the second shut-off valve (8).

10. The air conditioner according to any one of claims 7-9, characterized in that, It also includes a pressure gauge and a flow meter (3) installed on the main fluid pipeline, wherein the pressure gauge and the flow meter (3) are provided on at least one side upstream or downstream of the connecting pipe (701).

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