Explosion-proof outdoor unit for large air conditioning system

Abstract

The present application relates to air conditioning system technical field, especially large air conditioning system explosion -proof outdoor unit, liquid in condenser flows from high temperature chamber to low temperature chamber, liquid tank, control box is located in low temperature chamber, after heat dissipation through high temperature area, the temperature of refrigerant in condenser is reduced, flows to low temperature chamber, is further cooled in low temperature chamber, then enters liquid tank, liquid tank, control box are installed in low temperature chamber, can be well protected, the heat dissipation of low temperature chamber is used to heat dissipation of liquid tank, control box, compressor is located in low pressure chamber, and the main medium of noise transmission to the outside is air and base, air pressure is reduced, and then the propagation vibration through air can be weakened, noise is reduced, high temperature chamber, low temperature chamber, low pressure chamber are communicated with air outlet, and then heat dissipation can be fully carried out.

Description

Technical Field

[0001] This invention relates to air conditioning systems, and more particularly to explosion-proof outdoor units for large air conditioning systems. Background Technology

[0002] Large air conditioners are typically used in public places or factories, and include indoor and outdoor units.

[0003] Existing explosion-proof outdoor units for large air conditioning systems mainly include a base, on which an explosion-proof housing is mounted. A downward-facing main fan is mounted on the upper part of the explosion-proof housing, and an exhaust vent is located on the side wall of the housing. Inside the housing are a condenser, a compressor, a liquid receiver, and a control box. Since the compressor is located inside the explosion-proof housing, those skilled in the art need to address the noise problem of the outdoor unit. The primary function of the outdoor unit is heat dissipation, and improving noise reduction while simultaneously enhancing heat dissipation is a challenging technical problem. To achieve better heat dissipation, those skilled in the art have explored methods such as increasing the heat dissipation area, increasing ventilation volume, and water cooling. To improve heat dissipation, various methods are employed. For better noise reduction, isolation is used, typically by constructing the casing with sound-insulating materials or installing sound barriers. Both methods have some impact on heat dissipation and require comprehensive consideration during design. Additionally, installing shock-absorbing devices on the base can provide good shock absorption. However, since high-pressure refrigerant pipes are installed between the outdoor and indoor units, installing shock-absorbing devices increases the vibration amplitude of the explosion-proof casing, potentially leading to loosening of the high-pressure refrigerant pipe connections. Therefore, those skilled in the art are constantly seeking comprehensive solutions to these two technical problems: heat dissipation and noise reduction. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an explosion-proof outdoor unit for a large air conditioning system that can comprehensively solve the two technical problems of heat dissipation and noise reduction.

[0005] This invention is achieved through the following technical solution: an explosion-proof outdoor unit for a large air conditioning system, comprising a base, an explosion-proof housing mounted on the base, a downward-facing main fan mounted on the upper end of the explosion-proof housing, an exhaust vent mounted on the side wall of the explosion-proof housing, a condenser, a compressor, a liquid storage tank, and a control box disposed within the explosion-proof housing, and a heat-insulating and vibration-absorbing plate disposed within the explosion-proof housing, the heat-insulating and vibration-absorbing plate dividing the inner cavity of the explosion-proof housing into a high-temperature chamber, a low-temperature chamber, and a low-pressure chamber, the high-temperature chamber, the low-temperature chamber, and the low-pressure chamber being sequentially connected through a channel near the inner wall of the explosion-proof housing, 3 / 5-4 / 5 of the area of ​​the condenser being located in the high-temperature chamber, 1 / 5-2 / 5 of the area of ​​the condenser being located in the low-temperature chamber, liquid flowing from the high-temperature chamber to the low-temperature chamber within the condenser, the liquid storage tank and the control box being located in the low-temperature chamber, and the compressor being located in the low-pressure chamber, the high-temperature chamber, the low-temperature chamber, and the low-pressure chamber being all connected to the exhaust vent.

[0006] Furthermore, the explosion-proof housing is rectangular, and exhaust vents are provided on three side walls of the explosion-proof housing.

[0007] Furthermore, the coil of the condenser is arranged vertically, and the coil of the condenser includes an inner tube and an outer tube. The outer tube is directly opposite the gap of the inner tube, and the distance between the outer tube and the inner tube is 4-8mm.

[0008] Furthermore, the heat insulation and shock absorption plate includes an isolation plate disposed at the compressor, and an air guide plate extending towards the low temperature zone is connected to the end of the isolation plate. The angle between the air guide plate and the isolation plate is 130-150°. A return air plate is connected to the end of the air guide plate. The angle between the return air plate and the air guide plate is 130-150°. A channel is formed between the return air plate and the side wall of the explosion-proof housing.

[0009] Furthermore, wind baffles are provided at both ends of the return air plate, and wind baffle blades are provided on the wind baffles.

[0010] Furthermore, an exhaust duct extending to the outside of the exhaust port is provided at the low-pressure chamber, an exhaust fan is provided inside the exhaust duct, and an air inlet is provided at the inner end of the exhaust duct.

[0011] Furthermore, the base includes two parallel fixed rails, with a shaping beam disposed between the two fixed rails.

[0012] Furthermore, the base is also provided with a shock-absorbing device, which includes shock-absorbing holes disposed on a fixed rail, and an elastic body disposed inside the shock-absorbing holes.

[0013] Furthermore, a resonator is provided between the corresponding shock-absorbing holes of the two fixed rails, the end of the resonator is inserted into an elastic body, the resonator is made of a tubular component, and a counterweight is provided inside the resonator.

[0014] The beneficial effects of this invention are as follows: An explosion-proof outdoor unit for a large air conditioning system includes a heat-insulating and vibration-absorbing plate inside the explosion-proof housing. This plate divides the inner cavity of the explosion-proof housing into a high-temperature chamber, a low-temperature chamber, and a low-pressure chamber. These chambers are sequentially connected via channels near the inner wall of the explosion-proof housing. 3 / 5 to 4 / 5 of the condenser's area is located within the high-temperature chamber, which has a large heat dissipation area and is the main area for condenser heat dissipation. 1 / 5 to 2 / 5 of the condenser's area is located within the low-temperature chamber. Liquid within the condenser flows from the high-temperature chamber to the low-temperature chamber. A liquid storage tank is also included. The control box is located in the low-temperature chamber. After heat dissipation in the high-temperature zone, the refrigerant temperature in the condenser decreases and flows into the low-temperature chamber, where it is further cooled before entering the liquid receiver. The liquid receiver and control box are both installed in the low-temperature chamber, which provides excellent protection. The low-temperature chamber dissipates heat to the liquid receiver and control box. The compressor is located in the low-pressure chamber. The noise is mainly transmitted outward through air and the base. Reducing the air pressure weakens the vibration transmitted through the air and reduces noise. The high-temperature chamber, low-temperature chamber, and low-pressure chamber are all connected to the exhaust vent, which allows for sufficient heat dissipation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Example 1;

[0016] Figure 2 This is a top view of the explosion-proof enclosure;

[0017] Figure 3 This is a schematic diagram of the windbreak plate structure;

[0018] Figure 4 This is a schematic diagram of the exhaust duct structure;

[0019] Figure 5 This is a schematic diagram of the base structure;

[0020] Figure 6 This is a schematic cross-sectional view of the resonator.

[0021] The components include: 1. Base; 101. Fixed rail; 102. Shaping beam; 103. Resonator; 104. Counterweight filler; 105. Elastic body;

[0022] 2. Explosion-proof housing; 3. Exhaust vent; 4. Main fan;

[0023] 5. Exhaust duct; 501. Exhaust fan; 502. Outer expansion duct; 503. Air inlet; 504. Interference vent;

[0024] 6. Compressor; 7. Control box; 8. Liquid receiver; 9. Inner tube; 10. Outer tube; 11. Isolation plate; 12. Air guide plate; 13. Return air plate;

[0025] 14. Windbreak plate one; 1401. Windbreak blade; 15. Windbreak plate two;

[0026] 16. High-temperature chamber; 17. Low-temperature chamber; 18. Low-pressure chamber. Detailed Implementation

[0027] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1-6As shown, an explosion-proof outdoor unit for a large air conditioning system includes a base 1. The base 1 includes two parallel fixed rails 101, which are made of I-beams. A sizing beam 102, also made of I-beams, is welded and fixed between the two fixed rails 101, providing high structural strength. A shock-absorbing device is also installed on the base 1. Specifically, the shock-absorbing device includes shock-absorbing holes machined into the grooves of the fixed rails 101, filled with an elastomer 105. A resonator 103 is installed between the corresponding shock-absorbing holes of the two fixed rails 101, with its end inserted into the elastomer 105. The resonator 103 is made of tubing and contains a counterweight 104. Since vibration is transmitted through the air and the base 1, and the base 1 needs to be stably fixed to reduce vibration amplitude and protect the high-pressure refrigerant pipes, after assembling the base 1, the base 1... The base 1 is fixedly installed on a prefabricated foundation and adjusted before being fixed to ensure its stability. To reduce the vibration transmitted by the base 1, an elastomer 105 is installed on the base 1 without affecting its support stability. The vibration transmitted through the base 1 is weakened. During the test, a rubber resonator 103 was attached to the surface of the fixed rail 101. The initial effect was good, but the rubber resonator 103 was easy to fall off and could not be maintained. The resonator 103 provided in this embodiment has high stability and long service life. The elastomer 105 is made of vulcanized rubber, which has high elasticity and hardness. The elastomer 105, the resonator 103, and the fixed rail 101 are all installed with an interference fit. The counterweight filling 104 is made of quartz sand or resin sand, and the filling amount is 2 / 3-3 / 4 of the inner cavity of the pipe, which has a good resonance effect and reduces the noise transmitted through the base 1. The base 1 uses I-beams, which also facilitates the installation of the explosion-proof shell 2.

[0031] An explosion-proof housing 2 is fixedly installed on the base 1. A downward-facing main fan 4 is installed on the upper end of the explosion-proof housing 2. Exhaust vents 3 are machined on the side walls of the explosion-proof housing 2. Specifically, the explosion-proof housing 2 is a rectangular housing. Exhaust vents 3 are machined on the three side walls of the explosion-proof housing 2 to ensure heat dissipation area. A condenser, compressor 6, liquid storage tank 8, and control box 7 are installed inside the explosion-proof housing 2. The coil of the condenser is installed vertically. The coil of the condenser includes an inner tube 9 and an outer tube 10. The outer tube 10 is directly opposite the gap of the inner tube 9. The distance between the outer tube 10 and the inner tube 9 is 4-8mm. After the exhaust air passes through the gap of the inner tube 9, it is blocked by the outer tube 10 and then reversed, cooling the outer wall of the inner tube 9 and improving the heat dissipation effect. Moreover, the exhaust air does not interfere with each other, reducing noise.

[0032] A heat-insulating and shock-absorbing plate is installed inside the explosion-proof housing 2. The heat-insulating and shock-absorbing plate is a compressed foam board, which is fixed to the explosion-proof housing 2. The heat-insulating and shock-absorbing plate divides the inner cavity of the explosion-proof housing 2 into a high-temperature chamber 16, a low-temperature chamber 17, and a low-pressure chamber 18. The high-temperature chamber 16, the low-temperature chamber 17, and the low-pressure chamber 18 are connected sequentially through a channel near the inner wall of the explosion-proof housing 2. 3 / 5-4 / 5 of the condenser's area is located in the high-temperature chamber 16, and 1 / 5-2 / 5 of the condenser's area is located in the low-temperature chamber 17. The liquid in the condenser flows from the high-temperature chamber 16 to the low-temperature chamber. The liquid storage tank 8 and the control box 7 are located in the low-temperature chamber 17. The control box 7 is an explosion-proof control box. The compressor 6 is located in the low-pressure chamber 18. The high-temperature chamber 16, the low-temperature chamber 17, and the low-pressure chamber 18 are all connected to the exhaust port 3. Specifically, the heat insulation and vibration absorption plate includes an isolation plate 11 located at the compressor 6. The end of the isolation plate 11 is connected to a wind guide plate 12 extending towards the low-temperature zone. The angle between the wind guide plate 12 and the isolation plate 11 is 130-150°. At the boundary between the low-temperature chamber 17 and the low-pressure chamber 18, the airflow flows towards the low-pressure chamber 18. Through the action of the wind guide plate 12, the airflow velocity increases, forming turbulence, interfering with the transmission of vibration, and reducing the air pressure, thereby reducing the vibration transmission effect and achieving the purpose of noise reduction. At the same time, it also accelerates the compressor. 6. Cooling and protecting compressor 6. A return air plate 13 is connected to the end of the air guide plate 12. The angle between the return air plate 13 and the air guide plate 12 is 130-150°. The airflow in the high-temperature chamber 16 is blocked by the return air plate 13 and reflected back to the high-temperature chamber 16, then discharged through the exhaust port 3. This ensures the airflow in the high-temperature chamber 16, thus guaranteeing the heat dissipation effect. A channel is formed between the return air plate 13 and the side wall of the explosion-proof housing 2. A small portion of the airflow flows between the low-temperature chamber 17 and the high-temperature chamber 16 through this channel. Since the initial autonomous fan 4 provides the same air pressure to the high-temperature chamber 16, low-temperature chamber 17, and low-pressure chamber 18, within the high-temperature chamber 16… As the air temperature rises, its volume expands, and correspondingly, the pressure increases, tending to flow towards the low-pressure chamber 18 to release pressure. Baffles are installed at both ends of the return air plate 13: a baffle plate 14 closer to the high-temperature chamber 16 and a baffle plate 15 further away from the high-temperature chamber 16. Both baffle plates 14 and 15 are equipped with baffle blades 1401, which are freely rotating. When the airflow passes over the blades, it pushes them to rotate, thus creating wind resistance and suppressing the flow of air from the high-temperature chamber 16 into the low-temperature chamber 17. Since both the high-temperature chamber 16 and the low-temperature chamber 17 are used for heat dissipation, airflow between them is permitted.

[0033] To maintain low pressure in the low-pressure chamber 18, an exhaust duct 5 extending to the exhaust port 3 is installed there. A cooling fan 501 is installed inside the exhaust duct 5, and an air inlet 503 is machined into the inner end of the exhaust duct 5. It is worth noting that the low pressure referred to in this embodiment is relative to the air directly supplied by the main fan 4. In the prior art, the main fan 4 directly supplies air to various parts of the explosion-proof housing 2, resulting in similar air pressures at each part, all higher than the external air pressure. Through the exhaust duct 5 and the air guide plate 12, the air pressure in the low-pressure chamber 18 is lower than in other parts, the flow velocity is higher, and turbulence is generated, improving the heat dissipation effect on the compressor 6 and reducing noise transmitted through the air. Since the motor of the compressor 6 has its own cooling fan 501, this embodiment... In this example, the shaft of the cooling fan 501 is extended, and the cooling fan 501 is moved outward. The inner end of the exhaust duct 5 is integrally formed with an outer expansion cylinder 502, which is fitted onto the outer half of the compressor. An interference hole 504 is also machined on the exhaust duct 5. The airflow from the air inlet 503 interferes with the airflow from the interference hole 504, thereby improving the noise reduction effect. Since the shaft of the cooling fan 501 is extended, the cooling fan 501 is installed outside the compressor motor, and the installation space for the blades is increased. Correspondingly, the blade diameter can be adjusted according to calculations. Without affecting the normal power output of the compressor 6, the blade diameter can be increased, thereby increasing the air volume, reducing the air pressure at the air inlet 503, and improving the noise reduction and heat dissipation effects.

[0034] In summary, this embodiment provides an explosion-proof outdoor unit for a large air conditioning system. A heat-insulating and vibration-absorbing plate is installed inside the explosion-proof housing 2. This plate divides the inner cavity of the explosion-proof housing 2 into a high-temperature chamber 16, a low-temperature chamber 17, and a low-pressure chamber 18. These chambers are sequentially connected via channels near the inner wall of the explosion-proof housing 2. 3 / 5 to 4 / 5 of the condenser's area is located within the high-temperature chamber 16, which has a large heat dissipation area and is the main area for condenser heat dissipation. 1 / 5 to 2 / 5 of the condenser's area is located within the low-temperature chamber 17. Liquid within the condenser flows from the high-temperature chamber 16 to the low-temperature chamber. The liquid storage tank 8 and control box are also included. 7 is located in the low-temperature chamber 17. After being cooled by the high-temperature zone, the refrigerant temperature in the condenser decreases and flows to the low-temperature chamber 17. It is further cooled in the low-temperature chamber 17 and then enters the liquid storage tank 8. The liquid storage tank 8 and the control box 7 are both installed in the low-temperature chamber 17, which can provide good protection. The heat dissipation of the low-temperature chamber 17 can dissipate heat from the liquid storage tank 8 and the control box 7. The compressor 6 is located in the low-pressure chamber 18. The medium for noise transmission to the outside is mainly air and the base 1. Reducing the air pressure can weaken the vibration transmitted through the air and reduce noise. The high-temperature chamber 16, the low-temperature chamber 17, and the low-pressure chamber 18 are all connected to the exhaust port 3, which can fully dissipate heat.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An explosion-proof outdoor unit for a large air conditioning system, comprising a base, an explosion-proof housing mounted on the base, a downward-facing main fan mounted on the upper end of the explosion-proof housing, an exhaust vent mounted on the side wall of the explosion-proof housing, and a condenser, a compressor, a liquid receiver, and a control box disposed within the explosion-proof housing, characterized in that... The explosion-proof shell is provided with a heat insulation and shock absorption plate, which divides the inner cavity of the explosion-proof shell into a high-temperature cavity, a low-temperature cavity and a low-pressure cavity, the high-temperature cavity, the low-temperature cavity and the low-pressure cavity are sequentially communicated through channels close to the inner wall of the explosion-proof shell, 3 / 5-4 / 5 area of the condenser is located in the high-temperature cavity, 1 / 5-2 / 5 area of the condenser is located in the low-temperature cavity, the liquid in the condenser flows from the high-temperature cavity to the low-temperature cavity, the liquid storage tank and the control box are located in the low-temperature cavity, the compressor is located in the low-pressure cavity, the high-temperature cavity, the low-temperature cavity and the low-pressure cavity are communicated with the air outlet, The explosion-proof shell is rectangular, and the explosion-proof shell is provided with air outlets on three side walls, The heat insulation and shock absorption plate comprises an isolation plate arranged at the compressor, an end of the isolation plate is connected with a wind guide plate extending to the low-temperature area, an included angle between the wind guide plate and the isolation plate is 130-150°, at the critical position of the low-temperature cavity and the low-pressure cavity, the airflow flows to the low-pressure cavity, the airflow velocity is increased by the action of the wind guide plate, an end of the wind guide plate is connected with a return air plate, an included angle between the return air plate and the wind guide plate is 130-150°, and the return air plate and the side wall of the explosion-proof shell form a channel, Both ends of the return air plate are provided with air resistance plates, and the air resistance plates are provided with air resistance blades.

2. The explosion-proof outdoor unit for a large air conditioning system according to claim 1, characterized in that, The coil of the condenser is vertically arranged, the coil of the condenser comprises an inner layer pipe and an outer layer pipe, the outer layer pipe is opposite to the gap of the inner layer pipe, and the distance between the outer layer pipe and the inner layer pipe is 4-8 mm.

3. The explosion-proof outdoor unit for a large air conditioning system according to claim 1, characterized in that, The low-pressure cavity is provided with an air exhaust cylinder extending to the outside of the air outlet, an air exhaust fan is arranged in the air exhaust cylinder, and an air inlet is arranged at the inner end of the air exhaust cylinder.

4. The explosion-proof outdoor unit for a large air conditioning system according to claim 1, characterized in that, The base comprises two parallel fixed rails, and a shaped beam is arranged between the two fixed rails.

5. The explosion-proof outdoor unit for a large air conditioning system according to claim 4, characterized in that, The base is further provided with a shock absorption device, the shock absorption device comprises shock absorption holes arranged on the fixed rails, and elastic bodies are arranged in the shock absorption holes.

6. The explosion-proof outdoor unit for a large air conditioning system according to claim 5, characterized in that, Resonance bodies are arranged between the corresponding shock absorption holes of the two fixed rails, the resonance bodies are inserted into the elastic bodies at the ends, the resonance bodies are made of pipe fittings, and counterweight fillings are arranged in the resonance bodies.

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