Low-noise heat pump

Abstract

The utility model relates to the technical field of heat pumps, and provides a low-noise heat pump which comprises a shell, a fan, a condenser, a compressor and an evaporator. The partition plates divide the shell into a plurality of sound insulation cavities; the sound insulation chamber comprises a first sound insulation cavity, a second sound insulation cavity and a third sound insulation cavity; the first sound insulation cavity is formed in the back side of the shell, the fan is arranged in the first sound insulation cavity, and air ports communicating with the outside are formed in multiple side faces of the first sound insulation cavity; the second sound-proof cavity is arranged on the surface side of the shell, the first sound-proof cavity and the second sound-proof cavity are communicated through an air duct, an opening is formed in the surface side of the shell, the condenser is arranged on the second sound-proof cavity and close to the opening, and the second sound-proof cavity is communicated with the outside through the condenser; one side of the third sound insulation cavity is connected with the second sound insulation cavity, the back side of the third sound insulation cavity is connected with the first sound insulation cavity, and the compressor and the evaporator are arranged in the third sound insulation cavity; the condenser is connected with the compressor and the evaporator. The utility model has the advantages of reducing heat pump noise and avoiding noise pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, and more particularly to a low-noise heat pump. Background Art

[0002] A heat pump is a highly efficient, energy-saving device that fully utilizes low-grade thermal energy. Heat can spontaneously transfer from a high-temperature object to a low-temperature object, but not spontaneously in the opposite direction. The heat pump's operating principle is a mechanical device that forces heat from a low-temperature object to a high-temperature object in a reverse cycle. It consumes only a small amount of reverse cycle net work to produce a large amount of heat, effectively utilizing otherwise difficult-to-use low-grade thermal energy to achieve energy savings. Heat pump units use no flammable or explosive gases or electrical heating elements for heating, resulting in high safety. They also produce no exhaust, wastewater, or waste residue, making them environmentally friendly. The average annual operating cost of a heat pump unit is only 1 / 4 of that of direct electric heating, 1 / 3 to 1 / 2 of that of oil or gas heating, and 1 / 1.5 of that of conventional solar energy.

[0003] Heat pumps generate considerable noise during operation, creating not only noise pollution and negatively impacting people's physical and mental health, but also significantly increasing the wind resistance of the outdoor unit's fan, leading to increased energy consumption and a significant decrease in overall performance. Furthermore, prolonged operation of an air conditioner or heat pump with high wind noise and wind resistance can significantly reduce the unit's service life. Therefore, researching low-noise heat pumps is of great practical significance. Furthermore, as people's quality of life improves, the demand for noise reduction in machines is also increasing, and low noise has become a major industry trend. Utility Model Content

[0004] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a low-noise heat pump for reducing the noise of the heat pump and optimizing the user experience.

[0005] The technical solution adopted by the utility model is to provide a low-noise heat pump, comprising: a housing, a fan, a condenser, a compressor and an evaporator;

[0006] It also includes: a plurality of partition plates, which divide the shell into a plurality of soundproof chambers;

[0007] The sound insulation chamber includes: a first sound insulation chamber, a second sound insulation chamber and a third sound insulation chamber;

[0008] The first sound insulation cavity is provided on the back side of the housing, the fan is provided in the first sound insulation cavity, and air vents communicating with the outside are provided on multiple side surfaces of the first sound insulation cavity;

[0009] The second sound insulation cavity is provided on the surface side of the housing, the first sound insulation cavity and the second sound insulation cavity are connected through an air duct, the surface side of the housing is provided with an opening, the condenser is provided on the second sound insulation cavity and close to the opening, and the second sound insulation cavity is connected to the outside through the condenser;

[0010] One side of the third sound insulation cavity is connected to the second sound insulation cavity, and the back side of the third sound insulation cavity is connected to the first sound insulation cavity. The compressor and the evaporator are arranged in the third sound insulation cavity;

[0011] The condenser is connected to the compressor and the evaporator.

[0012] In this technical solution, the first, second, and third soundproofing cavities are all structural cavities that can reduce noise during heat pump operation. Combining multiple soundproofing cavities can effectively reduce the noise generated by multiple components within the heat pump, effectively reducing noise generation. This prevents noise pollution for the surrounding environment and improves the physical and mental health of users. For the heat pump itself, reduced wind noise reduces energy consumption and extends the heat pump's service life. Furthermore, placing the fan, condenser, evaporator, and compressor, the main operating components of the heat pump, within the soundproofing cavity can further reduce noise and fully utilize the cavity's soundproofing function.

[0013] The third soundproofing chamber connects to the first and second soundproofing chambers, resulting in a compact overall structure and reduced overall volume, facilitating production, transportation, and installation. This arrangement also shortens the distances between components within the three soundproofing chambers, reducing the length of connected piping and minimizing the noise generated by piping vibration. This also reduces the impact of piping vibration on other structural components, lowering the cost of repair and maintenance. The shortened piping also saves material costs.

[0014] In some embodiments, the fan includes turbine blades, and the air outlet includes: an upper air outlet formed at the top of the shell, a lower air outlet formed at the bottom of the shell, and a left air outlet and a right air outlet formed on both sides of the shell respectively.

[0015] In the present technical solution, the fan is of a four-sided air outlet type, and the outer shell cooperates with the fan arrangement inside the outer shell to form a soundproof cavity that reduces noise. The upper air outlet, lower air outlet, left air outlet and right air outlet can all be various shapes such as long strips or circles, and can be set separately or connected. Air outlets are set in the upper, lower, left and right directions of the outer shell. When the four air outlets discharge air at the same time, the air outlet area is greatly increased, the wind speed is reduced, and the wind noise is reduced. Furthermore, since the air outlet area is greatly increased, even if the air outlet on one side is blocked by external objects, it will not affect the air outlet of the air outlets in the other three directions, and the other air outlets can also provide sufficient air outlet area, thereby ensuring the reduction of air outlet noise. Wind noise is reduced by the setting of the outer shell's own structure, without the need to add other noise reduction structure designs, saving production costs, facilitating installation, reducing weight, and facilitating transportation, while avoiding the impact of the newly added noise reduction structure on the operation of the heat pump components themselves.

[0016] In some embodiments, the upper air vent is in the shape of an elongated strip and extends to the left and right sides of the top surface of the shell; the left air vent and the right air vent are in the shape of an elongated strip and extend to the upper and lower sides of the side surface of the shell.

[0017] In this technical solution, the long strip-shaped air outlet can extend along the length of the shell or along the width of the shell. It can be straight or curved. The extension in this solution can refer to the extension of the shape of the long strip itself, or it can be the extension of multiple long strip-shaped air outlets arranged in an array, for example, arranged in a grid-like array. By extending the four air outlets up, down, left and right, an air outlet ring that is almost completely open on all sides is formed, which greatly increases the area of ​​the air outlet in each direction, reduces the air outlet speed in each direction, and effectively reduces the air outlet noise. This setting fully utilizes the structure of the shell itself, so that there is no obstruction to the air outlet on all four sides, and also improves the uniformity of the air outlet, further reducing the air outlet noise.

[0018] In some embodiments, the condenser includes a heat dissipation shell, and a plurality of fins arranged in the heat dissipation shell and distributed at intervals, and the distance between two adjacent fins is 2.5 mm to 3 mm.

[0019] In this technical solution, the fins are arranged in conjunction with the condenser arrangement in the second soundproof cavity to reduce noise. This solution appropriately increases the distance between the fins, increases the air outlet area of ​​the condenser, reduces the wind speed passing through the fins, and thus reduces the noise generated by the condenser. The appropriate fin distance setting also avoids it being too narrow and affecting the heat dissipation effect of the condenser and thus affecting the condensation effect, while avoiding its overly wide setting causing too many pollutants to enter the condenser through the fin spacing and affect the condensation effect. In addition, the increased air outlet area is evenly distributed at the distance between different fins, so that the condenser dissipates heat evenly, avoiding the local increase in the air outlet, which leads to a decrease in the condensation effect due to fast heat dissipation in some parts and slow heat dissipation in some parts, and even generates greater noise. That is, this solution reduces wind noise while ensuring the condensation effect by setting the appropriate distance between the fins, and evenly distributes the increased air outlet between different fins, which also makes the side of the heat pump more beautiful.

[0020] In some embodiments, a porous sound-absorbing sheet is further provided on the inner wall of the third sound insulation cavity.

[0021] In this technical solution, the third soundproofing cavity houses the compressor and evaporator, the primary noise sources of the heat pump. The sound-absorbing sheet effectively isolates this noise from the outside world, preventing noise pollution. The porous sound-absorbing sheet, made of a sound-insulating material, can be placed on one or more inner walls of the third soundproofing cavity.

[0022] In some embodiments, a flexible noise reduction sleeve is provided on the surface of the compressor, and the noise reduction sleeve is provided on the surface of the compressor.

[0023] In this technical solution, the noise reduction sleeve is installed on the surface of the compressor, which covers the compressor that mainly generates noise and isolates most of its noise inside the noise reduction sleeve, forming a double noise reduction effect with the porous sound-absorbing sheet in the third sound insulation cavity, further reducing the noise generated by the compressor.

[0024] In some embodiments, the compressor further includes a muffler box, wherein the compressor and the noise reduction sleeve are arranged in the muffler box and form a six-sided seal for the compressor.

[0025] In this technical solution, the silencer box encloses the compressor and the noise reduction sleeve in the box, so that the compressor noise reduced by the noise reduction sleeve is further reduced, and the vibration of the compressor can be prevented from causing vibration of components in the same sound insulation cavity or different sound insulation cavities, thereby reducing the energy consumption of the heat pump and extending the service life of the heat pump.

[0026] In some embodiments, a sound-absorbing layer is provided on the inner side of the sound-absorbing box.

[0027] In this technical solution, the sound-absorbing layer is a noise-absorbing material and can be installed on one or more inner surfaces of the silencer box. Together with the silencer box, the noise-reducing sleeve, and the sound-absorbing sheet, it forms a multi-layer sound insulation system, significantly reducing compressor noise, minimizing noise pollution from the heat pump, and optimizing the user experience.

[0028] In some embodiments, at least one side of the muffler box is provided with a through hole for the extension of the pipe of the compressor, and a sealing rubber piece is provided on the through hole.

[0029] In this technical solution, the sealing rubber parts can prevent the collision between the compressor pipeline and the silencer box when it vibrates, reduce the probability of its damage, and perform silencer processing without increasing the repair and maintenance costs. At the same time, the setting of the sealing rubber parts also further increases the sealing of the silencer box, thereby further optimizing the silencer effect.

[0030] In some embodiments, a shock-absorbing support is provided at the bottom of the sound-absorbing box; the sound-absorbing box is connected to the third sound insulation cavity through the shock-absorbing support.

[0031] In this technical solution, the vibration-absorbing support is set to prevent the vibration of the compressor from causing the vibration of the casing, so that the heat pump has a stable operating environment and ensures the smooth operation of the heat pump. At the same time, it also avoids the noise caused by the vibration of the casing, thereby further reducing the noise generation.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] (1) The utility model combines multiple sound insulation chambers to reduce the noise generated by multiple components in the heat pump, effectively reducing the noise generation, avoiding noise pollution to the surrounding environment, and being beneficial to the physical and mental health of users. For the heat pump machine itself, it reduces wind noise, reduces energy consumption, and extends the service life of the heat pump.

[0034] (2) For the compressor that mainly generates noise, multiple sound insulation is formed by setting up noise reduction sleeves, sound absorbing sheets, sound absorbing layers and sealing rubber parts to reduce the noise caused by the compressor as much as possible, effectively reducing the noise pollution of the heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of the heat pump of the present utility model.

[0036] Figure 2 This is a schematic diagram of the internal structure of the heat pump of the present invention.

[0037] Figure 3 This is a schematic structural diagram of the compressor and evaporator of the utility model.

[0038] Figure 4 This is a schematic diagram of the air outlet structure of the first sound insulation cavity of the present invention.

[0039] Figure 5 This is a schematic structural diagram of the sound-absorbing layer of the present invention.

[0040] Figure 6 This is a schematic structural diagram of the sound-absorbing sheet of the present invention.

[0041] Figure 7 This is a structural diagram of the noise reduction sleeve of the present utility model.

[0042] Figure 8 This is a schematic structural diagram of the upper panel, rear panel and right panel of the muffler box of the present invention.

[0043] Figure 9 This is a schematic structural diagram of the front panel and the left panel of the muffler box of the present invention.

[0044] Figure 10 It is a structural schematic diagram of the lower panel of the muffler box of the present invention.

[0045] Figure numerals: first sound insulation chamber 100, fan 110, turbine blade 111, upper air outlet 120, lower air outlet 130, left air outlet 140, right air outlet 150, second sound insulation chamber 200, condenser 210, fin 211, third sound insulation chamber 300, compressor 310, evaporator 320, sound absorbing sheet 330, noise reduction sleeve 340, silencer box 350, sound absorbing layer 351, upper panel 352, lower panel 353, left panel 354, right panel 355, front panel 356, rear panel 357, sealing rubber part 358, back side 400, front side 500. DETAILED DESCRIPTION

[0046] The drawings in this utility model are for illustrative purposes only and are not to be construed as limiting the scope of this utility model. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0047] Example 1

[0048] refer to Figures 1 to 3This embodiment provides a low-noise heat pump, comprising: a housing, a fan 110, a condenser 210, a compressor 310, and an evaporator 320; and further comprising: a plurality of partition plates, which divide the housing into a plurality of soundproof chambers; the soundproof chambers comprising: a first soundproof chamber 100, a second soundproof chamber 200, and a third soundproof chamber 300; the first soundproof chamber 100 is arranged on the back side 400 of the housing, the fan 110 is arranged in the first soundproof chamber 100, and air vents communicating with the outside are provided on multiple side surfaces of the first soundproof chamber 100; the second soundproof chamber 200 is arranged on the front side 500 of the housing, and the The first soundproofing cavity 100 and the second soundproofing cavity 200 are connected through an air duct. The front side 500 of the shell is provided with an opening. The condenser 210 is arranged on the second soundproofing cavity 200 and close to the opening. The second soundproofing cavity 200 is connected to the outside through the condenser 210. One side of the third soundproofing cavity 300 is connected to the second soundproofing cavity 200, and the back side 400 of the third soundproofing cavity 300 is connected to the first soundproofing cavity 100. The compressor 310 and the evaporator 320 are arranged in the third soundproofing cavity 300. The condenser 210 is connected to the compressor 310 and the evaporator 320.

[0049] The first, second, and third soundproofing chambers 100, 200, and 300 are all structural cavities designed to reduce noise during heat pump operation. Combining these cavities effectively reduces noise generated by various components within the heat pump, effectively reducing noise pollution for the surrounding environment and benefiting the user's physical and mental health. Furthermore, reducing wind noise reduces energy consumption and extends the heat pump's service life. Furthermore, the fan 110, condenser 210, evaporator 320, and compressor 310, which are key operating components of the heat pump, are located within the soundproofing chambers, further reducing noise and fully utilizing the chambers' soundproofing capabilities.

[0050] The third soundproofing chamber 300 is connected to the first and second soundproofing chambers 100 and 200, resulting in a compact overall structure and reduced overall volume, facilitating production, transportation, and installation. This arrangement also shortens the distances between components within the three soundproofing chambers, reducing the length of connected piping and minimizing the noise generated by piping vibration. This also reduces the impact of piping vibration on other structural components, lowering the cost of repair and maintenance. Furthermore, shortening piping also saves material costs.

[0051] refer to Figure 2 and Figure 4 In some embodiments, the fan 110 includes turbine blades 111, and the air outlet includes: an upper air outlet 120 formed at the top of the shell, a lower air outlet 130 formed at the bottom of the shell, and a left air outlet 140 and a right air outlet 150 respectively formed on both sides of the shell.

[0052] The fan 110 is configured to vent air from four sides, and the housing is configured to cooperate with the fan 110 inside the housing to form a soundproof cavity that reduces noise. The upper air vent 120, the lower air vent 130, the left air vent 140, and the right air vent 150 can all be in various shapes such as long strips or circles, and can be set separately or in communication with each other. Air outlets are set in the upper, lower, left, and right directions of the housing. When the four air outlets vent air at the same time, the air outlet area is greatly increased, the wind speed is reduced, and the wind noise is reduced. Furthermore, since the air outlet area is greatly increased, even if the air outlet on one side is blocked by external objects, it will not affect the air outlet in the other three directions, and the other air outlets can also provide sufficient air outlet area, thereby ensuring the reduction of wind noise. Wind noise is reduced by the setting of the housing's own structure, without the need to add other noise reduction structure designs, saving production costs, facilitating installation, reducing weight, and facilitating transportation, while avoiding the impact of the newly added noise reduction structure on the operation of the heat pump's own components.

[0053] refer to Figure 4 In some embodiments, the upper air outlet 120 is long and extends to the left and right sides of the top surface of the shell; the left air outlet 140 and the right air outlet 150 are long and extend to the upper and lower sides of the side of the shell.

[0054] The long strip-shaped air outlet may extend along the length of the shell or along the width of the shell. It may be straight or curved. The extension in this solution may refer to the extension of the shape of the long strip itself, or it may be the extension of a plurality of long strip-shaped air outlets arranged in an array, for example, arranged in a grid shape. In this embodiment, the air outlet is preferably arranged in a grid arrangement, which can play a dust-proof role and reduce the possibility of external pollutants entering the heat pump through the air outlet, thereby ensuring the smooth operation of the heat pump. By extending the four air outlets up, down, left and right, an air outlet ring is formed that is almost completely open on all sides, which greatly increases the area of ​​the air outlet in each direction, reduces the air outlet speed in each direction, and effectively reduces the air outlet noise. Such a setting makes full use of the structure of the shell itself, so that there is no obstruction to the air outlet on all four sides, improves the uniformity of the air outlet, and further reduces the air outlet noise.

[0055] refer to Figure 1 and Figure 2 In some embodiments, the condenser 210 includes a heat dissipation shell, and a plurality of spaced fins 211 arranged in the heat dissipation shell, and the distance between two adjacent fins 211 is 2.5 mm to 3 mm. For example, the distance between two fins 211 is 2.5 mm, 2.6 mm, 2.8 mm or 3 mm.

[0056] The arrangement of the fins 211 coordinates with the placement of the condenser 210 within the second soundproof cavity 200 to reduce noise. This solution appropriately increases the distance between the fins 211, increasing the air outlet area of ​​the condenser 210 and reducing the wind speed passing through the fins 211, thereby reducing the noise generated by the condenser 210. Furthermore, the appropriate spacing between the fins 211 prevents them from being too narrow, which could affect the heat dissipation efficiency of the condenser 210 and thus the condensation process, while also preventing them from being too wide, which could cause excessive pollutants to enter the condenser 210 through the gaps between the fins 211 and affect the condensation process. Furthermore, the increased air outlet area is evenly distributed between the fins 211, ensuring uniform heat dissipation from the condenser 210 and avoiding the situation where locally enlarged air outlets result in faster heat dissipation in some areas and slower heat dissipation in others, which could lead to reduced condensation efficiency and even increased noise. In other words, this solution reduces wind noise while ensuring effective condensation by evenly distributing the increased air outlets between the fins 211, further enhancing the aesthetics of the heat pump front 500.

[0057] refer to Figures 5 to 7 In some embodiments, a porous sound-absorbing sheet 330 is further provided on the inner wall of the third soundproofing chamber 300. A flexible noise-reducing sleeve 340 is provided on the surface of the compressor 310, and the noise-reducing sleeve 340 is sleeved on the surface of the compressor 310. The compressor 310 also includes a sound-reducing box 350, and the compressor 310 and the noise-reducing sleeve 340 are arranged in the sound-reducing box 350 to form a six-sided seal for the compressor 310. A sound-absorbing layer 351 is provided on the inner side surface of the sound-reducing box 350. A through-hole for the extension of the pipe of the compressor 310 is provided on at least one side of the sound-reducing box 350, and a sealing rubber member 358 is provided on the through-hole. A shock-absorbing support is provided at the bottom of the sound-reducing box 350; the sound-reducing box 350 is connected to the third soundproofing chamber 300 via the shock-reducing support.

[0058] In this technical solution, the components placed within the third soundproofing cavity 300 are the compressor 310 and evaporator 320, which are the main noise sources of the heat pump. The sound-absorbing sheet 330 can effectively isolate the noise from the outside world, preventing noise pollution. The porous sound-absorbing sheet 330 is made of a soundproof material and is used to absorb noise. It can be installed on one or more inner walls of the third soundproofing cavity 300. Preferably, to improve the sound insulation effect, the sound-absorbing sheet 330 is installed on the front inner wall, rear inner wall, left inner wall, right inner wall, and upper inner wall of the third soundproofing cavity 300. The sound-absorbing sheet 330 can be a large coarse-pore rubber-plastic sponge with a thickness of 8 to 12 mm, for example, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm.

[0059] The noise reduction sleeve 340 is mounted on the surface of the compressor 310, enclosing the compressor 310, which primarily generates noise, and isolating the majority of the noise within the sleeve 340. This sleeve, together with the porous sound-absorbing sheet 330 in the third sound insulation chamber 300, creates a dual noise reduction effect, further reducing the noise generated by the compressor 310. The noise reduction sleeve 340 is preferably made of double-layered felt sound-absorbing cotton.

[0060] The silencer box 350 encloses the compressor 310 and the noise reduction sleeve 340 in the box, so that the noise of the compressor 310 reduced by the noise reduction sleeve 340 is further reduced, and the vibration of the compressor 310 can be prevented from causing vibration of components in the same sound insulation cavity or different sound insulation cavities, thereby reducing the energy consumption of the heat pump and extending the service life of the heat pump.

[0061] The sound-absorbing layer 351 is made of a noise-absorbing material and can be placed on one or more inner surfaces of the silencer box 350. Together with the silencer box 350, the noise-reducing sleeve 340, and the sound-absorbing sheet 330, it forms a multi-layer sound barrier, significantly reducing the noise of the compressor 310, minimizing noise pollution from the heat pump, and optimizing the user experience. Preferably, the sound-absorbing layer 351 is placed on the inner walls of all six sides of the silencer cover. The material is preferably large-pore rubber-plastic sound-absorbing cotton with a thickness of 8 to 12 mm, for example, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm.

[0062] The sealing rubber part 358 can prevent the compressor 310 pipeline from colliding with the silencer box 350 when it vibrates, reducing the probability of damage and performing silencer processing without increasing the repair and maintenance costs. At the same time, the setting of the sealing rubber part 358 also further increases the sealing of the silencer box 350, thereby further optimizing the silencer effect.

[0063] By setting up the shock-absorbing support, the vibration of the compressor 310 is prevented from causing the vibration of the casing, so that the heat pump has a stable operating environment and ensures the smooth operation of the heat pump. At the same time, the noise caused by the vibration of the casing is avoided, thereby further reducing the noise generation.

[0064] refer to Figures 8 to 10 Furthermore, the silencer is formed by the front panel 356, the left panel 354, the right panel 355, the rear panel 357, the upper panel 352 and the lower panel 353. The perforations are provided on the lower panel 353 and the upper panel 352. The number of perforations can be 2 to 6, for example, 2, 3, 4 or 5.

[0065] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A low-noise heat pump, comprising: housing, fans, condensers, compressors and evaporators; It is characterized by further comprising: a plurality of partition plates, which divide the shell into a plurality of sound insulation chambers; The sound insulation chamber includes: a first sound insulation chamber, a second sound insulation chamber and a third sound insulation chamber; The first sound insulation cavity is provided on the back side of the housing, the fan is provided in the first sound insulation cavity, and air vents communicating with the outside are provided on multiple side surfaces of the first sound insulation cavity; The second sound insulation cavity is provided on the surface side of the housing, the first sound insulation cavity and the second sound insulation cavity are connected through an air duct, the surface side of the housing is provided with an opening, the condenser is provided on the second sound insulation cavity and close to the opening, and the second sound insulation cavity is connected to the outside through the condenser; One side of the third sound insulation cavity is connected to the second sound insulation cavity, and the back side of the third sound insulation cavity is connected to the first sound insulation cavity. The compressor and the evaporator are arranged in the third sound insulation cavity; The condenser is connected to the compressor and the evaporator.

2. A low-noise heat pump according to claim 1, characterized in that: The fan includes turbine blades, and the air inlets include an upper air inlet formed at the top of the shell, a lower air inlet formed at the bottom of the shell, and a left air inlet and a right air inlet formed at both sides of the shell respectively.

3. A low-noise heat pump according to claim 2, characterized in that: The upper air vent is in the shape of an elongated strip and extends to the left and right sides of the top surface of the shell; the left air vent and the right air vent are in the shape of an elongated strip and extend to the upper and lower sides of the side surface of the shell.

4. A low-noise heat pump according to claim 1, characterized in that: The condenser includes a heat dissipation shell and a plurality of fins arranged in the heat dissipation shell and distributed at intervals. The distance between two adjacent fins is 2.5 mm to 3 mm.

5. A low-noise heat pump according to claim 1, characterized in that: A porous sound-absorbing sheet is also provided on the inner wall of the third sound-isolating cavity.

6. A low-noise heat pump according to any one of claims 1 to 5, characterized in that: A flexible noise reduction sleeve is provided on the surface of the compressor, and the noise reduction sleeve is sleeved on the surface of the compressor.

7. A low-noise heat pump according to claim 6, characterized in that: The compressor further comprises a muffler box, wherein the compressor and the noise reduction sleeve are arranged in the muffler box and form a six-sided seal for the compressor.

8. A low-noise heat pump according to claim 7, characterized in that: The inner side surfaces of the muffler boxes are all provided with sound absorbing layers.

9. The low-noise heat pump according to claim 7, characterized in that: A through hole for the extension of the pipe of the compressor is provided on at least one side of the muffler box, and a sealing rubber piece is provided on the through hole.

10. The low-noise heat pump according to claim 7, characterized in that: A shock-absorbing support is provided at the bottom of the sound-absorbing box; the sound-absorbing box is connected to the third sound insulation cavity through the shock-absorbing support.

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