Noise reduction device for air conditioning unit

Abstract

The utility model discloses a noise reduction device for an air conditioning unit. The noise reduction device comprises the air conditioning unit, a first noise reduction chamber, a second noise reduction chamber, a third noise reduction chamber and a cooling system, the first noise reduction chamber comprises a first shell, a first sound insulation material and a first sound absorption material; the second noise reduction chamber comprises a second shell, a second sound insulation material and a second sound absorption material; the third noise reduction chamber comprises a third shell, a third sound insulation material and a third sound absorption material. Through the first noise reduction chamber, the second noise reduction chamber, the third noise reduction chamber and the fourth sound absorption material arranged on the surface of the compressor, the noise reduction effect of the roof type air conditioning unit is achieved; temperature control over the space where the air conditioning unit is located is achieved through the cooling system and the temperature sensor. According to the utility model, the transmission of noise generated during the operation of the roof-type air-conditioning unit can be blocked, the output noise is reduced, the problem that the noise of the roof-type air-conditioning unit harms human bodies is solved, and meanwhile, a proper temperature environment is provided for the operation of the roof-type air-conditioning unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners and heat pumps, and particularly relates to a noise reduction device for an air conditioner unit. Background Art

[0002] The rooftop air conditioner unit is placed on the top platform of a building, in application scenarios such as rooftops. It includes single-cooling and heat pump devices such as air-cooled chiller (heat pump) units, water-cooled chiller (heat pump) units, and heat source tower chiller (heat pump) units, providing a comfortable environment for people's work and life.

[0003] During the use of the rooftop air conditioner unit, due to the presence of electrical equipment such as compressors, fans, and water pumps inside, noise pollution problems will occur, which will affect the long-term working or living personnel in the vicinity and even cause harm to their hearing. In addition, for the rooftop air conditioner unit, due to the high-temperature environment around it, or the sealing device or the heat generated by the working components, problems of an unsuitable internal high-temperature working environment will occur during its operation or shutdown. Similar problems also occur more or less in other non-rooftop air conditioner units during use, and urgent solutions are needed. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a noise reduction device for an air conditioner unit, which not only solves the noise problem of the rooftop air conditioner unit but also solves the problem of the internal high-temperature working environment.

[0005] The technical solution provided by the utility model is as follows:

[0006] A noise reduction device for an air conditioner unit includes a first noise reduction chamber, a second noise reduction chamber, and a third noise reduction chamber. The first noise reduction chamber is used to accommodate the air conditioner unit or the compressor of the air conditioner unit, and the first noise reduction chamber is arranged inside the second noise reduction chamber, and the second noise reduction chamber is arranged inside the third noise reduction chamber; the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber are all provided with a housing, a sound insulation layer, and a sound absorption layer.

[0007] Further, both the first noise reduction chamber and the second noise reduction chamber are fixedly arranged on the evaporator of the air conditioner unit through support members. The first noise reduction chamber covers the compressor of the air conditioner unit, and the second noise reduction chamber covers the first noise reduction chamber; the third noise reduction chamber is fixedly connected to the bottom channel steel of the air conditioner unit and covers the second noise reduction chamber.

[0008] Further, a sound absorption layer is arranged on the compressor of the air conditioner unit.

[0009] Further, the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber are all provided with openings for ventilation and heat exchange, and an inclined cover is arranged above the openings.

[0010] Further, the outer shell is made of galvanized sheet material, the sound insulation layer is made of PVC (polyvinyl chloride) damping sound insulation material, and the sound absorption layer is made of PU (polyurethane) sound absorption material.

[0011] Further, the thickness of the sound insulation layer of the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber is 1.5 mm. The thickness of the sound absorption layer of the first noise reduction chamber and the second noise reduction chamber is 40 mm, the thickness of the sound absorption layer of the third noise reduction chamber is 20 mm, and the thickness of the sound absorption layer provided on the compressor is 20 mm.

[0012] Further, a cooling system is further included. The cooling system includes a control module, a cooling device disposed in the third noise reduction chamber, a temperature sensor disposed in the first noise reduction chamber, a connecting pipeline for connecting the cooling device and an air conditioning unit, and a solenoid valve disposed on the connecting pipeline.

[0013] Further, the cooling device includes a third water inlet and a third water outlet. The third water inlet is connected to the first water outlet of the evaporator of the air conditioning unit, and the third water outlet is connected to the first water inlet of the evaporator.

[0014] Further, the cooling device includes a third water inlet and a third water outlet. The third water inlet is connected to the second water inlet of the condenser, and the third water outlet is connected to the second water outlet of the condenser.

[0015] Further, the cooling device is a fan coil unit.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] 1. The utility model uses the method of firmly attaching the sound absorption material to the compressor body to effectively carry out the first noise reduction on the compressor; uses the built-in first noise reduction chamber, adopts the fully sealed plus locally perforated mode, and uses the sheet metal to firmly attach to the sound insulation material and then closely attach to the sound absorption material, which not only maintains the internal air flow and ventilation to a certain extent, but also effectively carries out the second noise reduction on the compressor; uses the built-in second noise reduction chamber, adopts the fully sealed plus locally perforated mode, and uses the sheet metal to firmly attach to the sound insulation material and then closely attach to the sound absorption material, which not only maintains the internal air flow and ventilation to a certain extent, but also effectively carries out the third noise reduction on the compressor; uses the external third noise reduction chamber, adopts the fully sealed plus locally perforated mode and the mode of connecting the bottom with the bottom channel steel, and uses the sheet metal to firmly attach to the sound insulation material and then closely attach to the sound absorption material, which not only maintains the internal air flow and ventilation to a certain extent, but also carries out the fourth noise reduction on the compressor and effectively carries out the overall noise reduction on the unit.

[0018] 2. The present utility model adopts a scheme in which the compressor body is closely attached to the sound-absorbing cotton and three noise reduction chambers are combined for noise reduction. It can flexibly use one or more of these noise reduction methods in combination for noise reduction, which not only completely solves the noise problem of the rooftop unit, meets the noise reduction requirements, but also saves costs. The sound insulation materials, sound-absorbing materials and related thickness and other schemes preferably adopted by the present utility model have all been verified and considered through tests.

[0019] 3. The rooftop air conditioner unit is placed on the top of a building and is often exposed to sunlight. In addition, due to the heat loss of the unit itself and noise reduction and sealing measures, the internal environment temperature of the unit will be high during a certain period, which is not conducive to the operation and placement of components such as compressors. The present utility model utilizes the cooling system and its control method to provide a suitable environment for the operation of the rooftop air conditioner unit, ensuring the stable and reliable operation of the unit and low-noise output operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to assist in the further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0021] Figure 1 It is a schematic diagram of the device structure provided by an embodiment of the present utility model.

[0022] Among them, each reference numeral represents:

[0023] 1 - Third outer shell; 2 - Third sound insulation material; 3 - Third sound absorption material; 4 - Second outer shell; 5 - Second sound insulation material; 6 - Second sound absorption material; 7 - Evaporator; 8 - First water outlet; 9 - First water inlet; 10 - Air conditioner unit; 11 - Bottom channel steel; 12 - Second water inlet; 13 - Second water outlet; 14 - Compressor; 15 - Third sound insulation material; 16 - Third outer shell; 17 - First sound absorption material; 18 - First sound insulation material; 19 - Third sound absorption material; 20 - Cooling equipment; 21 - Condenser; 22 - First noise reduction chamber; 23 - First outer shell; 24 - Temperature sensor; 25 - Electric control cabinet; 26 - Solenoid valve; 27 - Cooling system; 28 - Support member; 29 - Third noise reduction chamber; 30 - Second noise reduction chamber; 31 - Third water outlet; 32 - Third water inlet; 33 - Fourth sound absorption material. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present utility model.

[0025] As Figure 1 shown, this embodiment provides a noise reduction device for an air conditioning unit, and its main structure includes: an air conditioning unit 10, a first noise reduction chamber 22, a second noise reduction chamber 30, a third noise reduction chamber 29, and a cooling system 27, as well as a temperature sensor 24 disposed in the first noise reduction chamber 22.

[0026] Among them, the air conditioning unit 10 includes an evaporator 7, a condenser 21, a compressor 14, and an electric control cabinet 25. The compressor 14 is a screw compressor or a device with similar functions. The condenser 21 is a shell-and-tube heat exchanger or a device with similar functions. The electric control cabinet 25 is placed on the condenser 21 or other components with reasonable structures. The compressor 14 is placed on the evaporator 7 or other components with reasonable structures. The evaporator 7 includes a first water inlet 9 and a first water outlet 8. The condenser 21 includes a second water inlet 12 and a second water outlet 13.

[0027] The cooling system 27 is located in the third noise reduction chamber 29 and includes a cooling device 20 and a solenoid valve 26. The cooling device 20 includes a third water inlet 32 and a third water outlet 31. The third water inlet 32 is connected to the first water outlet 8 of the evaporator 7, and the third water outlet 31 is connected to the first water inlet 9 of the evaporator 7. Alternatively, the third water inlet 32 is connected to the second water inlet 12 of the condenser 21, and the third water outlet 31 is connected to the second water outlet 13 of the condenser 21. The cooling device 20 uses a fan coil unit or other similar devices.

[0028] The first noise reduction chamber 22 includes a first outer shell 23, a first sound insulation material 18, and a first sound absorption material 17. The second noise reduction chamber 30 includes a second outer shell 4, a second sound insulation material 5, and a second sound absorption material 6. The third noise reduction chamber 29 includes a third outer shell 1 / 16, a third sound insulation material 2 / 15, and a third sound absorption material 3 / 19. The first noise reduction chamber 22 is fixedly connected to the evaporator 7 through a support member 28 and covers the compressor 14. Its internal space can just place the compressor 14, the first sound absorption material, and the first sound insulation material with some surplus. The second noise reduction chamber 30 is fixedly connected to the evaporator 7 through a support member 28 and covers the first noise reduction chamber. Its space can just place the first noise reduction chamber, the second sound absorption material, and the second sound insulation material with some surplus. The third noise reduction chamber 29 is fixedly connected to the bottom channel steel 11 and covers the second noise reduction chamber, the cooling system 27, and the air conditioner unit 10. Its space can just place the second noise reduction chamber, the rooftop air conditioner unit, the cooling system, the third sound absorption material, and the third sound insulation material with some surplus.

[0029] Specifically, the first outer shell 23 of the first noise reduction chamber 22 is made of galvanized sheet material or a material with similar functions. The first sound insulation material 18 is a PVC polyvinyl chloride damping sound insulation material or a material with similar functions. The first sound absorption material 17 is a PU polyurethane sound absorption material or a material with similar functions. The first sound insulation material 18 is firmly attached to the first outer shell 23, and the first sound absorption material 17 is firmly attached to the first sound insulation material 18. Similarly, the second outer shell 4 of the second noise reduction chamber 30 and the third outer shell 1 of the third noise reduction chamber 29 also adopt galvanized sheet material or a material with similar functions. The second sound insulation material 5 and the third sound insulation material 2 adopt PVC polyvinyl chloride damping sound insulation material or a material with similar functions. The second sound absorption material 6 and the third sound absorption material 3 adopt PU polyurethane sound absorption material or a material with similar functions. The second sound insulation material 5 is attached to the inner surface of the second outer shell 4, and the second sound absorption material 6 is attached to the surface of the second sound insulation material 5. The third sound insulation material 2 is attached to the inner surface of the third outer shell 1, and the third sound absorption material 3 is attached to the surface of the third sound insulation material 2.

[0030] In this embodiment, the first noise reduction chamber 22, the second noise reduction chamber 30, and the third noise reduction chamber 29 are used to achieve the noise reduction effect of the rooftop air conditioner unit. In some embodiments, to further enhance the noise reduction effect, the compressor 14 of the air conditioner unit 10 is also wrapped with a fourth sound absorption material 33. The fourth sound absorption material is closely attached to the compressor suction end body and the suction pipe. The fourth sound absorption material 33 can also adopt a PU polyurethane sound absorption material or other materials with similar functions.

[0031] In this embodiment, the temperature control of the space where the compressor 14 is located in the first noise reduction chamber 22 is achieved through the cooling system 27 and the temperature sensor 24. The on / off of the solenoid valve 26 and the start / stop of the cooling device 20 in the cooling system 27 are mainly determined by comparing the measured temperature Th of the first noise reduction chamber 22 obtained by the temperature sensor 24 with the target temperature Tm. It mainly involves the determination conditions and modes for the closing of the solenoid valve 26 and the start / stop of the cooling device 20: when the measured temperature Th ≥ the target temperature Tm + the deviation temperature dT, the solenoid valve 26 closes, and the cooling device 20 is started after a delay of 30 seconds (this time can be set); when the measured temperature Th ≤ the target temperature Tm - the deviation temperature dT, the solenoid valve 26 opens, and the cooling device 20 stops after a delay of 30 seconds (this time can be set); when the target temperature Tm - the deviation temperature dT ≤ Th ≤ the target temperature Tm + the deviation temperature dT, the solenoid valve 26 and the cooling device 20 maintain their current states.

[0032] In this embodiment, the value of the measured temperature Th comes from the measurement value of the temperature sensor, but it is not limited to this solution. It can also be other solutions with similar functions and meeting the requirements; the default value of the target temperature Tm is 45, and the default value of the deviation temperature dT is 10, but it is not limited to this solution. It can also be other solutions with similar functions and meeting the requirements.

[0033] It should be noted that: although the compressor in this embodiment is a screw type, it is not limited to the screw type. It can also be a scroll type, a piston type, or a device with similar functions; the condenser is a shell-and-tube heat exchanger, but it is not limited to the shell-and-tube type. It can also be a finned type, a double-pipe type, a plate type, or a device with similar functions; the evaporator is a shell-and-tube heat exchanger, but it is not limited to the shell-and-tube type. It can also be a finned type, a double-pipe type, a plate type, or a device with similar functions; the electrical control cabinet is placed on the condenser, but it is not limited to this placement method. It can also be placed on other components with reasonable structures; the compressor is placed on the evaporator, but it is not limited to this placement method. It can also be placed on other components with reasonable structures.

[0034] The first water inlet is a water inlet, but it is not limited to the water inlet. It can also be a water outlet; the second water outlet is a water outlet, but it is not limited to the water outlet. It can also be a water inlet; the second water inlet is a water inlet, but it is not limited to the water inlet. It can also be a water outlet; the second water outlet is a water outlet, but it is not limited to the water outlet. It can also be a water inlet; the third water inlet is a water inlet, but it is not limited to the water inlet. It can also be a water outlet; the third water outlet is a water outlet, but it is not limited to the water outlet. It can also be a water inlet; the first water inlet and the first water outlet are locked and serve as each other's inlet and outlet; the second water inlet and the second water outlet are locked and serve as each other's inlet and outlet; the third water inlet and the third water outlet are locked and serve as each other's inlet and outlet.

[0035] The top of the third noise reduction chamber is enclosed, and there are no other devices above the outer surface of the top, but this solution is not limited. It is also possible that the top of the third noise reduction chamber is not enclosed, and other devices or equipment can be connected above the outer surface of the top. The thicknesses of the first, second, and third sound insulation materials are 1.5 mm, the thicknesses of the first and second sound absorption materials are 40 mm, and the thicknesses of the third and fourth sound absorption materials are 20 mm. However, these thickness values are not limited to this, and other thicknesses that meet the actual requirements are also possible. Above the openings of the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber, there are inclined covers, which reduce the external output of noise while ensuring ventilation and heat exchange.

[0036] In this embodiment, the top and bottom of the first noise reduction chamber are sealed, and through holes are opened in the surrounding sheet metal, sound insulation, and sound absorption materials. Few or multiple holes can be opened, and the size of each hole is 2 mm wide and 8 mm long. The holes are arranged in a staggered manner up and down on the opposite two sheet metals and the sound insulation and sound absorption surfaces, but this solution is not limited. Other solutions with similar functions and meeting the requirements are also possible. The top and bottom of the second noise reduction chamber are sealed, and through holes are opened in the surrounding sheet metal, sound insulation, and sound absorption materials. Few or multiple holes can be opened, and the size of each hole is 2 mm wide and 8 mm long. The holes are arranged in a staggered manner up and down on the opposite two sheet metals and the sound insulation and sound absorption surfaces, but this solution is not limited. Other solutions with similar functions and meeting the requirements are also possible. The top of the third noise reduction chamber is sealed, the bottom is connected to the bottom channel steel, and through holes are opened in the surrounding sheet metal, sound insulation, and sound absorption materials. Few or multiple holes can be opened, and the size of each hole is 2 mm wide and 8 mm long. The holes are arranged in a staggered manner up and down on the opposite two sheet metals and the sound insulation and sound absorption surfaces, but this solution is not limited either.

[0037] The first noise reduction chamber is in a fully sealed plus partially open-hole mode, but this solution is not limited. Other modes with similar functions and meeting the requirements, such as a fully sealed and non-open-hole mode, are also possible; the second noise reduction chamber is in a fully sealed plus partially open-hole mode, but this solution is not limited. Other modes with similar functions and meeting the requirements, such as a fully sealed and non-open-hole mode, are also possible; the third noise reduction chamber is in a mode where the four sides and the top are fully sealed plus partially open-hole and the bottom is connected to the bottom channel steel, but this solution is not limited. Other modes with similar functions and meeting the requirements, such as a fully sealed and non-open-hole mode, are also possible.

[0038] The connecting pipe between the evaporator and the cooling device is introduced and led out from the middle position of the inlet and outlet of the evaporator, protruding from the inner pipe wall and approaching the center position of the circular cross-section of the inlet and outlet pipes. However, it is not limited to this solution, and other similar functions and solutions that can meet the requirements are also possible. Similarly, the connecting pipe between the condenser and the cooling device is introduced and led out from the middle position of the inlet and outlet of the condenser, protruding from the inner pipe wall and approaching the center position of the circular cross-section of the inlet and outlet pipes. However, it is not limited to this solution, and other similar functions and solutions that can meet the requirements are also possible. The outlet of the evaporator is connected to the inlet of the cooling device through a pipe, and a solenoid valve is installed on this pipe. The outlet of the cooling device is connected to the inlet of the evaporator through a pipe, forming a closed cycle. The chilled water exchanges heat with the air inside the third noise reduction chamber through the fan coil unit to achieve the purpose of cooling the indoor air, especially the air near the compressor.

[0039] The cooling device is a fan coil unit, but it is not limited to this device, and other similar functions and devices that can meet the requirements are also possible; the cooling device is placed in the upper part of the third noise reduction chamber near the compressor, which is more conducive to cooling the ambient air around the compressor. However, it is not limited to this placement method, and other solutions that can meet the requirements are also possible. The outlet of the cooling device is directly placed inside the third noise reduction chamber, and the treated air is directly blown towards the environment inside the third noise reduction chamber. However, it is not limited to this method, and there can also be a duct with openings connected to the outlet of the heat exchange device, the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber, introducing the air from the heat exchange device into the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber to facilitate more effective reduction of the ambient temperature in the first noise reduction chamber, the second noise reduction chamber, and the third noise reduction chamber.

[0040] There is one temperature sensor for obtaining the measured temperature Th value, but it is not limited to this method, and there can also be multiple; the temperature sensor for obtaining the measured temperature Th value is placed and fixed inside the first noise reduction chamber, and it can also be placed and fixed inside the second or third noise reduction chamber. It can be placed and fixed in the same space or in multiple spaces.

[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; under the idea of the present invention, the technical features between the above embodiments or different embodiments can also be combined, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A noise reduction device for an air conditioning unit, characterized in that: It includes a first noise reduction chamber, a second noise reduction chamber and a third noise reduction chamber. The first noise reduction chamber is used to accommodate the air-conditioning unit or the compressor of the air-conditioning unit, and the first noise reduction chamber is arranged in the second noise reduction chamber, and the second noise reduction chamber is arranged in the third noise reduction chamber; the first noise reduction chamber, the second noise reduction chamber and the third noise reduction chamber are all provided with an outer shell, a sound insulation layer and a sound absorption layer.

2. A noise reduction device for an air conditioning unit according to claim 1, characterized in that: The first noise reduction chamber and the second noise reduction chamber are both fixedly arranged on the evaporator of the air-conditioning unit through supporting members, the first noise reduction chamber covers the compressor of the air-conditioning unit, and the second noise reduction chamber covers the first noise reduction chamber; the third noise reduction chamber is fixedly connected to the bottom channel steel of the air-conditioning unit and covers the second noise reduction chamber.

3. A noise reduction device for an air conditioning unit according to claim 1, characterized in that: A sound absorbing layer is arranged on the compressor of the air conditioning unit.

4. A noise reduction device for an air conditioning unit as claimed in claim 1, characterized in that: The first noise reduction chamber, the second noise reduction chamber and the third noise reduction chamber are all provided with openings for ventilation and heat exchange, and inclined covers are arranged above the openings.

5. A noise reduction device for an air conditioning unit according to claim 1 or 3, characterized in that: The shell is made of galvanized sheet material, the sound insulation layer is made of PVC polyvinyl chloride damping sound insulation material, and the sound absorption layer is made of PU polyurethane sound absorption material.

6. A noise reduction device for an air conditioning unit as claimed in claim 5, characterized in that: The thickness of the sound insulation layer of the first noise reduction chamber, the second noise reduction chamber and the third noise reduction chamber is 1.5 mm, the thickness of the sound absorption layer of the first noise reduction chamber and the second noise reduction chamber is 40 mm, the thickness of the sound absorption layer of the third noise reduction chamber is 20 mm, and the thickness of the sound absorption layer set on the compressor is 20 mm.

7. The noise reduction device for an air conditioning unit according to claim 1, characterized in that: It also includes a cooling system, which includes a control module, a cooling device arranged in the third noise reduction chamber, a temperature sensor arranged in the first noise reduction chamber, and a connecting pipeline for connecting the cooling device and the air-conditioning unit and a solenoid valve arranged on the connecting pipeline.

8. A noise reduction device for an air conditioning unit as claimed in claim 7, characterized in that: The cooling device comprises a third water inlet and a third water outlet, the third water inlet is connected to the first water outlet of the evaporator of the air-conditioning unit, and the third water outlet is connected to the first water inlet of the evaporator.

9. The noise reduction device for an air conditioner as claimed in claim 7, characterized in that: The cooling device comprises a third water inlet and a third water outlet, the third water inlet is connected to the second water inlet of the condenser, and the third water outlet is connected to the second water outlet of the condenser.

10. The noise reduction device for an air conditioning unit according to claim 7, characterized in that: The cooling equipment is a fan coil unit.

Images