Low-noise variable-frequency air-cooled heat pump direct-expansion air conditioner outdoor unit

Abstract

The invention relates to the technical field of air conditioner outdoor units, and particularly discloses a low-noise variable-frequency air-cooled heat pump direct-expansion air conditioner outdoor unit which comprises a base plate, an air conditioner outdoor unit body is fixedly installed on the front face of the base plate, and a heat dissipation notch is formed in the front face of the air conditioner outdoor unit body. When the air conditioner outdoor unit operates, the cooling fan is started, a ventilation path is constructed through the cooling notch, external air enters through the air guide hopper, sequentially flows through the ventilation pipe and the noise reduction air pipe and then is exhausted, stable operation of the outdoor unit is guaranteed through efficient cooling, meanwhile, noise is guided to the ventilation pipe and the noise reduction air pipe, and the noise reduction effect is improved. The noise reduction plates which are spirally arranged in the noise reduction air pipe absorb sound in all directions under the condition of maintaining ventilation, even if noise escapes, the lower sound insulation cover, the upper sound insulation cover and the noise reduction sleeve seat can also play a role in sequence and block layer by layer, interference of the noise to the surrounding environment is greatly reduced, and a quiet and comfortable living space is created for residents.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioner outdoor units, in particular to a low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit. Background Art

[0002] In the modern building environment control system, air conditioners, as the core air conditioning equipment, use precise manual control methods to accurately adjust key parameters such as temperature, humidity, and flow rate of the ambient air inside buildings or structures. A complete air conditioning system mainly covers cold source / heat source equipment, cold and hot medium distribution system, and terminal device, and is equipped with a large number of auxiliary equipment. The refrigeration host, water pump, fan and pipeline system together build the basic framework for the stable operation of the system. The terminal device uses the cold and heat transmitted and distributed to finely adjust the air state to ensure that the air parameters of the target environment strictly meet the established standards. It occupies an irreplaceable and important position in modern life.

[0003] The outdoor unit of the air conditioner plays a critical role in the entire air conditioning system. Its working mechanism is as follows: the high-pressure and high-temperature gas discharged from the indoor unit is transmitted to the outside, and through the fan heat dissipation slot on the front of the outdoor unit, the operation of the fan achieves efficient cooling and heat dissipation. After the refrigerant liquid is condensed, it is transported to the evaporator of the indoor unit through the capillary tube, where it evaporates and turns into gas, absorbing indoor heat. This cycle repeats, causing the indoor temperature to gradually decrease.

[0004] However, most of the air-conditioning outdoor units on the market have exposed a series of problems that need to be solved in the actual application process. The fan heat dissipation slots set on the front of the air-conditioning outdoor unit play an indispensable role in the heat dissipation link, but during operation, the electronic components inside the outdoor unit chassis will generate significant noise, especially in the heat dissipation process of the condenser, the refrigerant is condensed from high-temperature and high-pressure gas to liquid. During this process, the flow of refrigerant in the pipeline is extremely unstable. At the changes in the pipe diameter and the bends in the pipeline, the flow rate and pressure of the refrigerant will change sharply, causing strong vibration of the pipeline, thereby generating noise. In addition, in order to assist the condenser in heat dissipation, the outdoor unit is usually equipped with a fan for forced air convection. When the fan rotates at high speed, the fan blades and the air Severe friction generates aerodynamic noise. If the dynamic balance of the fan is destroyed, such as dust and debris attached to the blades, or the motor bearings are worn, the eccentric vibration generated when the fan is running will further aggravate the noise. Since the heat dissipation slots are usually in an open state, the noise generated inside the external unit will be transmitted to the external environment through the heat dissipation slots without hindrance. As the use time continues to increase, the electronic components gradually age, the operating load also changes continuously, and the noise becomes more and more obvious. This noise pollution seriously interferes with the daily life of the surrounding residents and greatly reduces the quality of life of the residents. Especially during the rest period at night, high-decibel noise can easily cause residents' irritability, interfere with sleep, and have a negative impact on the physical and mental health of the residents;

[0005] From the perspective of equipment operation, due to the lack of effective noise reduction measures, the noise propagation at the heat dissipation slot is difficult to be effectively curbed. Long-term exposure to a high-noise environment will not only have an adverse impact on the surrounding environment, but may also cause equipment failure. The continuous vibration effect generated by the noise may cause the internal wiring of the outdoor unit to loosen and the connection between components to be loose, accelerate equipment wear, reduce overall stability and reliability, shorten the service life of the air-conditioning outdoor unit, and increase equipment maintenance and replacement costs. In places with extremely strict noise restrictions, such as hospitals, schools, libraries, etc., the existing air-conditioning outdoor units are difficult to meet environmental requirements due to noise problems, which seriously restricts their scope of application. In addition, noise pollution may also cause social problems such as neighborhood disputes, bringing challenges to property management and community harmony. Therefore, it is necessary to improve the design of existing technologies. Summary of the invention

[0006] The purpose of the present invention is to provide a low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit to solve the problem of poor noise reduction ability during application of the prior art mentioned in the above background technology.

[0007] To achieve the above object, the present invention provides a low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit, comprising a base plate, the front of the base plate is fixedly mounted with the air conditioner outdoor unit, the front of the air conditioner outdoor unit is provided with a heat dissipation slot, a heat dissipation fan is arranged inside the heat dissipation slot, the front of the air conditioner outdoor unit is located outside the heat dissipation slot and is fixedly mounted with an installation device, and the front of the air conditioner outdoor unit is installed with a noise reduction ventilation device through the installation device;

[0008] The noise reduction ventilation device includes an air guide scoop, which is installed on the front of the air conditioner outdoor unit through an installation device, and is arranged on the outside of the heat dissipation slot. A ventilation pipe is fixedly installed on the outside of the air guide scoop, and a first noise reduction mechanism is fixedly installed on the outer end of the ventilation pipe, and a second noise reduction mechanism is fixedly installed on the outside of the first noise reduction mechanism.

[0009] Furthermore, the mounting device includes a mounting ring, an annular groove is provided on the outer side of the mounting ring, a limiting component is fixedly connected to the inner side of the annular groove and arranged in a ring shape at equal intervals, the rear side of the air guide scoop is inserted into the inner side of the mounting ring, and the limiting component is clamped with the air guide scoop.

[0010] Furthermore, the limit assembly includes a limit arm and a limit spring, the limit springs are arranged in a ring shape at equal intervals and fixedly connected to the inside of the annular groove, the end of the limit spring is fixedly connected to an arc-shaped slider, the outer side of the arc-shaped slider is fixedly connected to a limit frame, the limit arms are arranged in a ring shape at equal intervals and fixedly installed on the outer side of the air guide scoop, the outer end of the limit arm is fixedly connected to the limit arc sleeve, and the end of the limit frame is inserted into the inside of the limit arc sleeve.

[0011] Furthermore, the front view shape of the limiting arc sleeve and the outer end of the limiting frame are both arranged in an arc shape, and the arc-shaped parts of the limiting arc sleeve and the limiting frame are arranged concentrically with the mounting ring.

[0012] Furthermore, the cross-sectional shape of the arc-shaped sliding blocks is arranged in a convex shape, and the inner cross-sectional shape of the annular groove is also arranged in a convex shape.

[0013] Furthermore, a connecting ring is fixedly installed on the inner end of the limiting frame, the connecting ring connects the limiting frames, and an adjustable armrest is fixedly installed on one side of the connecting ring.

[0014] Furthermore, the first noise reduction mechanism comprises a noise reduction air duct, the noise reduction air duct is fixedly connected to the outer end of the ventilation duct, and the interior of the noise reduction air duct is fixedly connected with noise reduction plates arranged in a spiral shape at equal intervals.

[0015] Furthermore, the second noise reduction mechanism includes an upper sound insulation cover, which is fixedly installed on the lower end of the outer surface of the noise reduction air duct, and the bottom of the upper sound insulation cover is fixedly connected with a connecting frame at equal intervals, and the bottom of the connecting frame is fixedly installed with a lower sound insulation cover.

[0016] Furthermore, a noise reduction sleeve is fixedly installed on the outer side of the connecting frame, and the noise reduction sleeve is sleeved on the outer surfaces of the upper sound insulation cover and the lower sound insulation cover. The noise reduction plate, the upper sound insulation cover, the lower sound insulation cover and the noise reduction sleeve are all composed of a composite noise reduction layer, and the upper sound insulation cover and the lower sound insulation cover are both arranged in a conical shape.

[0017] Furthermore, the composite noise reduction layer includes a base layer, which is made of a metal material, specifically an aluminum plate or a steel plate, a sound insulation layer is fixedly connected to the inner side of the base layer, the sound insulation layer can be made of a sound insulation gypsum material, a perforated sound absorption layer is fixedly connected to the inner side of the sound insulation layer, and the perforated sound absorption layer can be made of a glass wool perforated sound absorption board or a rock wool perforated sound absorption board.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] First, the noise reduction ventilation device provided in the present invention can achieve the dual excellent effects of heat dissipation and noise reduction during use. When the air conditioner outdoor unit is in operation, the heat dissipation fan starts immediately, and a smooth ventilation path is constructed by means of the heat dissipation slot. The outside air enters through the wind guide bucket, flows through the ventilation duct and the noise reduction duct in turn, and is finally discharged out of the machine, so as to efficiently achieve the heat dissipation goal and ensure the stable operation of the air conditioner outdoor unit. In this process, the noise is also accurately guided to the inside of the ventilation duct and the noise reduction duct. The noise reduction plates arranged in a spiral shape with equal spacing in the noise reduction duct use a unique layout to ensure smooth ventilation while absorbing noise in all directions. Even if some noise leaks through the net, the lower sound insulation cover, the upper sound insulation cover and the noise reduction sleeve will play a role in turn, blocking layer by layer. On the basis of stable heat dissipation, the interference of noise on the surrounding environment is greatly reduced, creating a quiet and comfortable living space for residents.

[0020] Secondly, the noise reduction plate, upper soundproof cover, lower soundproof cover and noise reduction sleeve of the device are all composed of a composite noise reduction layer. During use, the base layer is made of aluminum plate or steel plate. The solid material not only provides reliable support for the overall structure, but also can reflect part of the noise based on the metal characteristics. The inner soundproof gypsum material sound insulation layer, with its rich internal microporous structure, effectively blocks the propagation of medium and high frequency noise and absorbs sound energy. The perforated sound absorption layer composed of glass wool or rock wool perforated sound-absorbing panels, with the help of perforated design, makes it easier for sound to penetrate into the fiber structure, and consumes sound energy through friction between the fiber and the air. The upper and lower soundproof covers are conical, and the unique shape causes the noise to be reflected and attenuated multiple times inside. This composite noise reduction structure reduces the internal noise spillover of the air conditioner outdoor unit in all directions, which not only enhances the operating stability of the equipment and prolongs its service life, but also can be perfectly adapted to places with strict noise restrictions such as hospitals and schools.

[0021] Thirdly, the present invention provides an installation device, which makes it easy to carry out inspection and maintenance during use. In actual use, the operator only needs to easily hold the adjustment armrest and rotate the connecting ring to drive the arc-shaped slider to slide in the annular groove, so that the limit frame and the limit arc sleeve are quickly separated, and then the air guide bucket is conveniently pulled out to realize the dismantling of the entire device. When installation is required, the operation is reversed, and the limit frame is separated from the limit arc sleeve by squeezing the limit spring. After inserting the air guide bucket, the armrest is released, and the limit spring is quickly reset to push the arc-shaped slider, so that the limit frame and the limit arc sleeve are accurately limited to each other to complete the installation. The whole process is simple to operate, which is convenient for quick maintenance of the noise reduction ventilation device, effectively improves the equipment utilization efficiency, and makes users more worry-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure in the present invention when viewed from above;

[0024] Figure 3 It is a side view structural schematic diagram of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the air conditioner outdoor unit and the noise reduction ventilation device in the present invention in a split state;

[0026] Figure 5 This is a schematic diagram of the structure of the installation device and the noise reduction ventilation device in the present invention in the separated state;

[0027] Figure 6 Schematic diagram of the internal structure of the first noise reduction mechanism in the present invention;

[0028] Figure 7 Schematic diagram of the internal structure of the second noise reduction mechanism in the present invention;

[0029] Figure 8 For the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0030] Fig. 9 This is a schematic diagram of the structure of the composite noise reduction layer in the present invention.

[0031] In the figure: 1. base plate; 2. air conditioner outdoor unit; 3. heat dissipation notch; 4. heat dissipation fan; 5. mounting device; 51. mounting ring; 52. annular groove; 53. limit assembly; 531. limit arm; 532. limit spring; 533. arc-shaped slider; 534. limit frame; 535. limit arc sleeve; 536. connecting ring; 537. adjusting armrest; 6. noise reduction ventilation device; 61. air guide scoop; 62. ventilation duct; 63. first noise reduction mechanism; 631. noise reduction air duct; 632. noise reduction board; 64. second noise reduction mechanism; 641. upper sound insulation cover; 642. connecting frame; 643. lower sound insulation cover; 644. noise reduction sleeve; 65. composite noise reduction layer; 651. base layer; 652. sound insulation layer; 653. perforated sound absorption layer. DETAILED DESCRIPTION

[0032] Example

[0033] See also Figure 1-Figure 9 In an embodiment of the present invention, a low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit comprises a substrate 1, an air conditioner outdoor unit 2 is fixedly mounted on the front of the substrate 1, a heat dissipation slot 3 is provided on the front of the air conditioner outdoor unit 2, a heat dissipation fan 4 is provided inside the heat dissipation slot 3, an installation device 5 is fixedly mounted on the front of the air conditioner outdoor unit 2 outside the heat dissipation slot 3, and a noise reduction ventilation device 6 is installed on the front of the air conditioner outdoor unit 2 through the installation device 5;

[0034] The noise reduction ventilation device 6 includes an air guide 61, which is installed on the front of the air conditioner outdoor unit 2 through the installation device 5. The air guide 61 is set on the outside of the heat dissipation slot 3. A ventilation pipe 62 is fixedly installed on the outside of the air guide 61. A first noise reduction mechanism 63 is fixedly installed on the outer end of the ventilation pipe 62. A second noise reduction mechanism 64 is fixedly installed on the outside of the first noise reduction mechanism 63. When the air conditioner outdoor unit is working, when the air conditioner outdoor unit 2 is running, the cooling fan 4 is ventilated through the heat dissipation slot 3, and the air is discharged through the air guide 61, the ventilation pipe 62 and the noise reduction air pipe 631 to achieve efficient heat dissipation. At the same time, the noise is introduced into the ventilation pipe 62 and the noise reduction air pipe 631. The spirally arranged noise reduction plates 632 in the noise reduction air pipe 631 effectively absorb the noise while ensuring ventilation. After part of the remaining noise is transmitted to the outside of the noise reduction air pipe 631, the lower sound insulation cover 6 43 plays a sound insulation role, the reflected noise is further reduced by the upper sound insulation cover 641, and the trace overflow noise is blocked again by the noise reduction sleeve 644. The noise reduction plate 632, the upper sound insulation cover 641, the lower sound insulation cover 643 and the noise reduction sleeve 644 are all composed of a composite noise reduction layer 65. The base layer 651 supports and reflects noise, the sound insulation layer 652 blocks medium and high frequency noise, and the perforated sound absorption layer 653 absorbs medium and high frequency sound. In terms of installation and maintenance, if disassembly and maintenance are required, the operator holds the adjustment armrest 537 to drive the connecting ring 536 to rotate, and the arc-shaped slider 533 slides to separate the limit frame 534 from the limit arc sleeve 535, so that the air guide 61 and the entire noise reduction ventilation device 6 can be removed; when installing, the reverse operation is performed. After the limit spring 532 is reset, the limit frame 534 and the limit arc sleeve 535 limit each other, and the installation device 5 is stabilized, which is convenient for the use and maintenance of the device.

[0035] See also Figure 1-Figure 5 and Figure 8The mounting device 5 includes a mounting ring 51, an annular groove 52 is provided on the outer side of the mounting ring 51, and the inner side of the annular groove 52 is evenly spaced and fixedly connected to a limiting component 53, and the rear side of the air guide bucket 61 is inserted into the inner side of the mounting ring 51, and the limiting component 53 is clamped with the air guide bucket 61, and the limiting component 53 includes a limiting arm 531 and a limiting spring 532, and the limiting spring 532 is evenly spaced and fixedly connected to the inner side of the annular groove 52, and the end of the limiting spring 532 is fixedly connected to an arc-shaped slider 533, and the outer side of the arc-shaped slider 533 is fixedly connected to a limiting frame 534, and the limiting arm 531 is evenly spaced and arranged in a ring and fixedly installed on the outer side of the air guide bucket 61, and the outer end of the limiting arm 531 is fixedly connected to a limiting arc sleeve 535, and the end of the limiting frame 534 is inserted into the inner side of the limiting arc sleeve 535. When the mounting device 5 is working, the annular groove 52 provided on the outer side of the mounting ring 51 provides installation and activity space for each component. When installing the air guide 61, insert the rear side of the air guide 61 into the installation ring 51. At this time, the limiting arc sleeve 535 connected to the outer end of the limiting arm 531 arranged in a ring shape at equal intervals on the outer side of the air guide 61 will interact with the limiting component 53 in the annular groove 52. In the limiting component 53, one end of the limiting spring 532 is fixed in the annular groove 52, and the other end is connected to the arc-shaped slider 533. The limiting frame 534 fixed on the outer side of the arc-shaped slider 533 is initially limited by the limiting spring The action of 532 will prompt the limit frame 534 to be inserted into the limit arc sleeve 535, so as to realize the clamping connection between the limit arm 531 and the limit assembly 53, thereby firmly installing the air guide 61 on the mounting ring 51. If the air guide 61 is to be removed, external force is applied to overcome the elastic force of the limit spring 532, so that the arc-shaped slider 533 slides in the annular groove 52, driving the limit frame 534 to separate from the limit arc sleeve 535, and then the air guide 61 can be pulled out from the inside of the mounting ring 51 to complete the disassembly operation.

[0036] See also Figure 1-Figure 5 and Figure 8The front view shape of the limit arc sleeve 535 and the outer end of the limit frame 534 are both arranged in an arc shape. The arc-shaped parts of the limit arc sleeve 535 and the limit frame 534 are arranged concentrically with the mounting ring 51. The cross-sectional shape of the arc-shaped slider 533 is arranged in a convex shape. The internal cross-sectional shape of the annular groove 52 is also arranged in a convex shape. A connecting ring 536 is fixedly installed on the inner end of the limit frame 534. The connecting ring 536 connects each limit frame 534. An adjusting handrail 537 is fixedly installed on one side of the connecting ring 536. The mounting ring 51 is used as a basic component, and an annular groove 52 is provided on its outer side. 2 can be used to accommodate the limit assembly 53, and the inner cross-section of the annular groove 52 is convex, which is adapted to the arc-shaped slider 533 with a convex cross-section. This special design can effectively prevent the arc-shaped slider 533 from escaping from the annular groove 52 during the sliding process, thereby ensuring the stability of the device operation. When installing the air guide 61, its rear side is inserted into the mounting ring 51. At this time, the limit assembly 53 plays a role in the limited installation, and the outer ends of the limit arc sleeve 535 and the limit frame 534 are designed to be arc-shaped, and their arcs are arranged concentrically with the mounting ring 51. This design ensures The limiting frame 534 can be accurately inserted into the limiting arc sleeve 535 to achieve a close fit and stable clamping, so that the air guide 61 is firmly fixed on the mounting ring 51. If the air guide 61 is to be removed during use, the operator holds the adjustment armrest 537, and the adjustment armrest 537 is fixed to one side of the connecting ring 536. The connecting ring 536 is connected to each limiting frame 534. The connecting ring 536 is driven to rotate by rotating the adjustment armrest 537. The rotation of the connecting ring 536 causes each limiting frame 534 to move synchronously, thereby driving the arc-shaped slider 533 connected thereto to slide in the annular groove 52. When the arc-shaped slider 533 slides, it will squeeze the limit spring 532, so that the limit frame 534 will gradually separate from the limit arc sleeve 535. When the limit frame 534 is completely separated from the limit arc sleeve 535, the air guide 61 can be easily pulled out from the inside of the mounting ring 51 to complete the disassembly. The installation process is the reverse operation of the disassembly. After the adjusting armrest 537 is loosened, the limit spring 532 is reset, pushing the arc-shaped slider 533 and the limit frame 534 back to their original positions, and the limit arc sleeve 535 is inserted again to achieve a stable installation of the air guide 61.

[0037] See also Figure 1-Figure 7 and Fig. 9The first noise reduction mechanism 63 includes a noise reduction air duct 631, which is fixedly connected to the outer end of the ventilation pipe 62. The interior of the noise reduction air duct 631 is evenly spaced and spirally arranged and fixedly connected with noise reduction plates 632. The second noise reduction mechanism 64 includes an upper sound insulation cover 641, which is fixedly installed on the lower end of the outer surface of the noise reduction air duct 631. A connecting frame 642 is evenly spaced and fixedly connected to the bottom of the upper sound insulation cover 641. A lower sound insulation cover 643 is fixedly installed at the bottom of the connecting frame 642. A noise reduction sleeve 644 is fixedly installed on the outer side of the connecting frame 642. The noise reduction sleeve 644 is sleeved on the outer surfaces of the upper sound insulation cover 641 and the lower sound insulation cover 643. The noise reduction plate 632, the upper sound insulation cover 641, the lower sound insulation cover 643 and the noise reduction plate 632 are fixedly connected to the upper sound insulation cover 641. The sleeves 644 are all composed of a composite noise reduction layer 65, the upper sound insulation cover 641 and the lower sound insulation cover 643 are both arranged in a conical shape, the composite noise reduction layer 65 includes a base layer 651, the base layer 651 is made of a metal material, specifically an aluminum plate or a steel plate, the inner side of the base layer 651 is fixedly connected with a sound insulation layer 652, the sound insulation layer 652 can be made of a sound insulation gypsum material, the inner side of the sound insulation layer 652 is fixedly connected with a perforated sound absorption layer 653, the perforated sound absorption layer 653 can be made of a glass wool perforated sound absorption board or a rock wool perforated sound absorption board, when the air conditioner outdoor unit 2 is running, the cooling fan 4 promotes air circulation through the cooling slot 3, and the hot air passes through the air guide scoop 61 and the ventilation pipe 62 in turn, and enters the first noise reduction mechanism 63, the noise reduction in the first noise reduction mechanism 63 The air duct 631 is fixedly connected to the outer end of the ventilation duct 62, and the noise reduction plates 632 arranged in a spiral shape at equal intervals inside the air duct 631 play a key role. These noise reduction plates 632 are composed of a composite noise reduction layer 65. When the air passes through the noise reduction air duct 631, on the one hand, it maintains smooth ventilation, and on the other hand, it absorbs the noise in the airflow. The spiral layout allows the noise reduction plates 632 to perform noise reduction processing on the noise at various positions in the noise reduction air duct 631 in all directions during the noise downward process. The air and the remaining noise that have been preliminarily processed by the first noise reduction mechanism 63 enter the second noise reduction mechanism 64. The upper soundproof cover 641 of the second noise reduction mechanism 64 is installed at the lower end of the outer surface of the noise reduction air duct 631. The conical upper and lower soundproof covers 643 are connected by a connecting frame 642. The lower soundproof cover 643 is fixedly connected and is located at the bottom. When part of the noise is transmitted to the outside of the noise reduction air duct 631, the lower soundproof cover 643 first plays a sound insulation role and reflects the noise upward to the upper soundproof cover 641. The upper soundproof cover 641 further blocks and attenuates the noise. At the same time, the noise reduction sleeve 644 surrounding the outside of the connecting frame 642 is also composed of a composite noise reduction layer 65, which further reduces the trace noise that may overflow from the gap between the upper and lower soundproof covers 643. The base layer 651 of the composite noise reduction layer 65 is made of metal materials such as aluminum plates or steel plates, which not only provides structural support, but also reflects part of the noise. The inner soundproof gypsum material soundproof layer 652 effectively blocks medium and high frequency noise and absorbs sound energy by virtue of its microporous structure.The perforated sound-absorbing layer 653 formed by the innermost glass wool perforated sound-absorbing board or rock wool perforated sound-absorbing board uses a perforated design to make it easier for sound to enter the fiber structure, and converts sound energy into heat energy through the friction between the fiber and the air, thereby reducing the transmission of noise to the external environment in all directions and achieving a highly efficient noise reduction effect. ;

[0038] The working principle of the present invention is as follows: in terms of noise reduction and ventilation, when the device is put into use and the air conditioner outdoor unit 2 is running, the cooling fan 4 is started, ventilation and air exchange are carried out through the heat dissipation slot 3, and the air is discharged to the outside through the wind guide scoop 61, the ventilation pipe 62 and the noise reduction air duct 631, so as to efficiently realize the heat dissipation function. In this process, the noise is also guided and enters the ventilation pipe 62 and the noise reduction air duct 631 through the wind guide scoop 61. The noise reduction plates 632 arranged in a spiral shape at equal intervals inside the noise reduction air duct 631 can play an excellent sound absorption effect while ensuring smooth ventilation. The spiral layout enables the noise reduction plates 632 to be able to absorb noise. During the downward transmission process, the noise at each position in the noise reduction air duct 631 is effectively reduced. When part of the remaining noise is transmitted to the outside of the noise reduction air duct 631, the lower sound insulation cover 643 at the bottom immediately plays a sound insulation role, and the noise reflected by the lower sound insulation cover 643 is transmitted to the upper sound insulation cover 641 at the top. The upper sound insulation cover 641 further performs sound insulation and noise reduction operations. Even if a trace amount of noise is transmitted outward through the gap between the upper and lower sound insulation covers 643, the noise reduction sleeve 644 surrounding it can still perform further sound insulation and noise reduction, thereby achieving a strong sound absorption and noise reduction effect under the premise of maintaining stable ventilation and heat dissipation;

[0039] In the design of the installation device 5, during the noise reduction operation of the device, the noise reduction plate 632, the upper sound insulation cover 641, the lower sound insulation cover 643 and the noise reduction sleeve 644 are all composed of a composite noise reduction layer 65, wherein the base layer 651 made of an aluminum plate or a steel plate not only provides a solid support for the entire structure, but its metal properties can also reflect part of the noise. The inner sound insulation plaster material sound insulation layer 652, with its internal microporous structure, effectively blocks the propagation of medium and high frequency noise and absorbs sound energy. The perforated sound absorption layer 653 composed of a glass wool perforated sound absorption board or a rock wool perforated sound absorption board performs excellently in absorbing medium and high frequency sounds, and the perforated design enables the sound to penetrate deeper into the interior more easily. The fiber structure converts sound energy into heat energy through the friction between the fiber and the air, and the upper soundproof cover 641 and the lower soundproof cover 643 are conical in structure. This special shape makes the noise reflect and attenuate multiple times inside, and cooperates with the composite noise reduction layer 65 to prevent the noise generated by the electronic components and condenser inside the chassis of the air-conditioning outdoor unit 2 from being transmitted to the external environment through the heat dissipation slot 3 in all directions, greatly reducing the interference with the lives of surrounding residents, improving the stability of equipment operation, and extending the service life of the equipment. Especially in places with strict noise restrictions, it can fully meet the application needs. During the use of the device, if the noise reduction ventilation device 6 needs to be disassembled and repaired The operator can hold the adjustment armrest 537 to drive the connecting ring 536 to rotate. The rotation of the connecting ring 536 synchronously drives each arc-shaped slider 533 to slide in the annular groove 52. By adjusting the movement of the arc-shaped slider 533, the limiting frame 534 and the limiting arc sleeve 535 are separated from each other, and then the air guide scoop 61 can be pulled out from the inner side of the mounting ring 51 at the heat dissipation slot 3, so that the entire noise reduction ventilation device 6 can be removed. When installing the noise reduction ventilation device 6, the adjustment armrest 537 is held again to drive the connecting ring 536 to push the arc-shaped slider 533 to move. At this time, the arc-shaped slider 533 squeezes the limiting spring 532 to shrink it, and the limiting spring 532 is in When in the compressed state, the limit frame 534 can be detached from the inner side of the limit arc sleeve 535, and the limit frame 534 can be rotated outward to facilitate the insertion of the air guide scoop 61 into the mounting ring 51, and then the adjusting armrest 537 is loosened, the limit spring 532 is reset, and the arc-shaped slider 533 is pushed to reset and slide in the annular groove 52, thereby pushing the limit frame 534 to be inserted into the limit arc sleeve 535. Through the mutual limitation of the limit frame 534 and the limit arc sleeve 535, the air guide scoop 61 and the entire noise reduction and ventilation device 6 are firmly installed at the heat dissipation slot 3 on the outside of the air-conditioning outdoor unit 2, so that the overall device has the characteristics of easy disassembly, assembly, inspection and maintenance, which greatly facilitates the use of the device.

Claims

1. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit, characterized in that: The invention comprises a base plate (1), an air conditioner outdoor unit (2) is fixedly mounted on the front of the base plate (1), a heat dissipation slot (3) is provided on the front of the air conditioner outdoor unit (2), a heat dissipation fan (4) is provided inside the heat dissipation slot (3), a mounting device (5) is fixedly mounted on the front of the air conditioner outdoor unit (2) outside the heat dissipation slot (3), and a noise reduction ventilation device (6) is mounted on the front of the air conditioner outdoor unit (2) via the mounting device (5); The noise reduction ventilation device (6) comprises an air guide scoop (61), the air guide scoop (61) being installed on the front of the air conditioner outdoor unit (2) via an installation device (5), the air guide scoop (61) being arranged on the outside of the heat dissipation slot (3), a ventilation pipe (62) being fixedly installed on the outside of the air guide scoop (61), a first noise reduction mechanism (63) being fixedly installed on the outer end of the ventilation pipe (62), and a second noise reduction mechanism (64) being fixedly installed on the outside of the first noise reduction mechanism (63).

2. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The mounting device (5) comprises a mounting ring (51), an annular groove (52) is provided on the outer side of the mounting ring (51), a limiting assembly (53) is fixedly connected to the inside of the annular groove (52) and arranged in an annular shape at equal intervals, the rear side of the air guide scoop (61) is inserted into the inside of the mounting ring (51), and the limiting assembly (53) and the air guide scoop (61) are snap-connected.

3. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 2, characterized in that: The limiting assembly (53) comprises a limiting arm (531) and a limiting spring (532), the limiting springs (532) are arranged in a ring shape at equal intervals and are fixedly connected to the inside of the annular groove (52), the end of the limiting spring (532) is fixedly connected to an arc-shaped slider (533), the outer side of the arc-shaped slider (533) is fixedly connected to a limiting frame (534), the limiting arms (531) are arranged in a ring shape at equal intervals and are fixedly installed on the outer side of the air guide scoop (61), the outer end of the limiting arm (531) is fixedly connected to a limiting arc sleeve (535), and the end of the limiting frame (534) is inserted into the inside of the limiting arc sleeve (535).

4. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 3, characterized in that: The front view shape of the limiting arc sleeve (535) and the outer end of the limiting frame (534) are both arranged in an arc shape, and the arc-shaped parts of the limiting arc sleeve (535) and the limiting frame (534) are arranged concentrically with the mounting ring (51).

5. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 4, characterized in that: The cross-sectional shape of the arc-shaped sliding block (533) is arranged in a convex shape, and the internal cross-sectional shape of the annular groove (52) is also arranged in a convex shape.

6. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 5, characterized in that: A connecting ring (536) is fixedly mounted on the inner end of the limiting frame (534), the connecting ring (536) connects the limiting frames (534), and an adjusting armrest (537) is fixedly mounted on one side of the connecting ring (536).

7. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The first noise reduction mechanism (63) comprises a noise reduction air duct (631), wherein the noise reduction air duct (631) is fixedly connected to the outer end of the ventilation pipe (62), and noise reduction plates (632) are fixedly connected to the interior of the noise reduction air duct (631) at equal intervals and arranged in a spiral shape.

8. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 7, characterized in that: The second noise reduction mechanism (64) comprises an upper sound insulation cover (641), the upper sound insulation cover (641) is fixedly mounted on the lower end of the outer surface of the noise reduction air duct (631), a connecting frame (642) is fixedly connected to the bottom of the upper sound insulation cover (641) at equal intervals, and a lower sound insulation cover (643) is fixedly mounted on the bottom of the connecting frame (642).

9. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 8, characterized in that: A noise reduction sleeve (644) is fixedly mounted on the outer side of the connecting frame (642); the noise reduction sleeve (644) is sleeved on the outer surfaces of the upper sound insulation cover (641) and the lower sound insulation cover (643); the noise reduction plate (632), the upper sound insulation cover (641), the lower sound insulation cover (643) and the noise reduction sleeve (644) are all composed of a composite noise reduction layer (65); and the upper sound insulation cover (641) and the lower sound insulation cover (643) are both arranged in a conical shape.

10. A low-noise variable frequency air-cooled heat pump direct expansion air conditioner outdoor unit according to claim 9, characterized in that: The composite noise reduction layer (65) comprises a base layer (651), the base layer (651) is made of a metal material, specifically an aluminum plate or a steel plate, a sound insulation layer (652) is fixedly connected to the inner side of the base layer (651), the sound insulation layer (652) can be made of a sound insulation gypsum material, a perforated sound absorption layer (653) is fixedly connected to the inner side of the sound insulation layer (652), and the perforated sound absorption layer (653) can be made of a glass wool perforated sound absorption board or a rock wool perforated sound absorption board.

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