Central air conditioner outdoor unit buoyancy convection energy-saving system

Abstract

The present application relates to the field of air conditioners, and particularly relates to an energy-saving system for an outdoor unit of a central air conditioner, wherein the outdoor unit of the central air conditioner is provided with two air outlets; the heat exchange fan of the outdoor unit is a forward-reverse fan; the forward state of the forward-reverse fan is a forward working state of upward air discharge, and the reverse state of the forward-reverse fan is a reverse working state of downward air discharge; the forward-reverse fan is connected to a control system through a forward switch and a reverse switch; the system comprises a ventilation pipeline, which is provided with an air outlet and an air inlet, and the air outlet of the central air conditioner is communicated with the air inlet; the system further comprises a wind power negative pressure system, which comprises a wind collecting structure; the wind collecting structure is provided with an opening on the lower side of the air outlet end as an air suction port; the air suction port is a horizontally arranged opening; the air outlet is communicated with the air suction port; when hot air or cold air is discharged, the thermodynamic buoyancy is utilized to make the hot air discharge upward and the cold air discharge downward, so as to reduce the energy consumption of the outdoor unit of the central air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, in particular to an energy-saving system for an outdoor unit of a central air conditioner. BACKGROUND

[0002] The outdoor unit of a central air conditioner is a core component of an air conditioning system. In the air conditioner, a forward-reverse fan needs to continuously blow air towards a condenser pipe to help the condenser in the condenser pipe exchange heat with air. The operation of the fan consumes a large amount of electric energy.

[0003] In extreme weather, the air conditioner needs to provide more heat exchange capacity. The hot or cold air of the condenser pipe cannot easily accumulate in the outdoor unit of the central air conditioner, so that the temperature of the outdoor unit of the central air conditioner rises when the air conditioner is cooling (the temperature of the outdoor unit of the central air conditioner drops when the air conditioner is heating), which will result in that the cooling of the forward-reverse fan of the outdoor unit does not achieve the expected effect and the energy consumption of the outdoor unit increases. SUMMARY

[0004] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, the abstract and the title. Such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the problems existing in the prior art, the present application is proposed.

[0006] To solve the above technical problems, the present application provides the following technical solutions.

[0007] The energy-saving system for the outdoor unit of a central air conditioner includes a heat exchange row formed by coiling a condenser pipe and a control system for driving the outdoor unit of the central air conditioner. The control system has a microprocessor system.

[0008] The outdoor unit of the central air conditioner is provided with two air outlets. One air outlet is arranged above the outdoor unit and above the heat exchange row, and the other air outlet is arranged below the outdoor unit and below the heat exchange row.

[0009] The control system controls the connection of the outdoor unit heat exchange fan.

[0010] The outdoor unit heat exchange fan is a forward-reverse fan, and the forward-reverse fan is arranged upward.

[0011] The forward state of the forward-reverse fan is a forward working state of upward air discharge, and the reverse state of the forward-reverse fan is a reverse working state of downward air discharge.

[0012] The forward-reverse fan is connected to the control system through a forward switch and a reverse switch.

[0013] The cooling switch of the control system is linked with the forward rotation switch of the forward-reverse fan;

[0014] The heating switch of the control system is linked with the reverse rotation switch of the forward-reverse fan;

[0015] The ventilation duct is provided with an air outlet and an air inlet, and the air outlet of the central air conditioner outdoor unit is communicated with the air inlet.

[0016] The wind power negative pressure system comprises a wind collecting structure.

[0017] The wind collecting structure is designed as a horn type wind collecting structure with a large opening area at one end and a small opening area at the other end.

[0018] The lower side of the wind collecting structure at the air outlet end is provided with an opening as an air suction port.

[0019] The lower side of the wind collecting structure at the air outlet end is provided with an opening as an air suction port.

[0020] The air suction port is a horizontally arranged opening.

[0021] The air outlet is communicated with the air suction port.

[0022] A one-way valve with a guide direction towards the air suction port is arranged between the air outlet of the central air conditioner outdoor unit and the air suction port.

[0023] Four wind collecting structures are arranged on each ventilation duct, the air outlet of the four wind collecting structures is in butt joint communication, the air suction ports of the four wind collecting structures are integrated into one, and the opposite two wind collecting structures are in direct communication.

[0024] The above design, first, the central air conditioner outdoor unit is provided with two air outlets, and is also provided with an upward reversible fan, when the air conditioner is cooling, the reversible fan is turned to an upward air exhaust working state, hot air is floated to exhaust hot air from the air outlet above the central air conditioner outdoor unit, when the air conditioner is heating, the reversible fan is turned to a downward air exhaust working state, cold air is easily sunk to exhaust cold air from the air outlet below the central air conditioner outdoor unit, the efficiency of exhausting hot air and cold air of the central air conditioner outdoor unit is improved, when hot air or cold air is exhausted, the thermodynamic buoyancy is used to make hot air exhaust upward and cold air exhaust downward, thereby reducing the energy consumption of the central air conditioner outdoor unit; second, the reversible fan is connected to the control system through the forward rotation switch and the reverse rotation switch, so that the control system can be automatically switched to the downward air exhaust reverse working state or the upward air exhaust forward working state in the cooling or heating mode, and the control system is automatically switched conveniently and quickly; finally, when the central air conditioner is cooling, the air suction port of the air collecting structure provides suction, and a certain suction effect is provided at the air outlet above, thereby greatly saving the energy of the fan, and a gap is left between the air inlet and the air outlet to prevent the switching of the air outlet from affecting the effect of the air conditioner outdoor unit.

[0025] Preferably, the central air conditioner outdoor unit further comprises an upper connecting pipeline communicated with the air outlet above the central air conditioner outdoor unit, and a lower connecting pipeline communicated with the other air outlet below the central air conditioner outdoor unit; the air inlet of the ventilation pipeline is an upper and lower movable air inlet; the ventilation pipeline is further provided with an upper and lower telescopic mechanism for driving the ventilation pipeline to move; the driving motor of the upper and lower telescopic mechanism is connected to the control system through the upward moving switch and the downward moving switch; the upward moving switch of the driving motor is linked with the cooling switch of the control system, the cooling switch is started, the upward moving switch starts the driving motor to drive the air inlet to move upward, the air inlet is connected and communicated with the upper connecting pipeline; the downward moving switch of the driving motor is linked with the heating switch of the control system, the heating switch is started, the downward moving switch starts the driving motor to drive the air inlet to move downward, the air inlet is connected and communicated with the lower connecting pipeline; when the central air conditioner is cooling, the air suction port of the air collecting structure provides suction, and a certain suction effect is provided at the air outlet above, when the central air conditioner is heating, the air suction port of the air collecting structure provides suction, and a certain suction effect is provided at the other air outlet below, thereby improving the air exhaust effect of the air conditioner outdoor unit when the central air conditioner is cooling and heating, and saving the energy of the motor of the air conditioner outdoor unit.

[0026] Preferably, the distance between the ventilation pipeline and the ground is greater than 10 meters and less than 100 meters, so that the ventilation pipeline can be arranged on the air conditioner outdoor unit to play a role in the central air conditioner outdoor unit.

[0027] Preferably, the ratio of the diameter of the air inlet of the horn type air collecting structure to the length of the depth from the air inlet to the air outlet of the air collecting structure is greater than 0.4 to 1 and less than 1.6 to 1.

[0028] Preferably, the forward-reverse fan is provided with two, one of which is arranged at the upper air outlet of the central air conditioner outdoor unit, and the other is arranged at the lower air outlet of the central air conditioner outdoor unit; the forward-reverse fan is located above the heat exchange row; the other forward-reverse fan is located below the heat exchange row; the provision of two forward-reverse fans improves the heat exchange efficiency of the central air conditioner outdoor unit and avoids the accumulation of hot or cold air inside the central air conditioner outdoor unit.

[0029] Preferably, the distance between the forward-reverse fan and the upper side of the heat exchange row is 30-50 cm; the distance between the other forward-reverse fan and the lower side of the heat exchange row is 30-50 cm; a distance of 30-50 cm ensures that the air of the forward-reverse fan can cover the heat exchange row and blow away the hot and cold air, ensuring high-efficiency heat exchange of the central air conditioner outdoor unit.

[0030] Preferably, the heat exchange row is provided with a pipe structure formed by at least three layers of condenser pipes wound transversely, and the upper and lower pipe structures are sequentially connected; the provision of at least three layers of pipe structures increases the contact area between the condenser pipes and the air when the flowing air passes through the heat exchange row, thereby improving the heat dissipation efficiency of the heat exchange row and saving the energy required by the forward-reverse fan.

[0031] Preferably, the heat exchange row comprises a fin structure formed by fins arranged in a row, the faces of the fins in the fin structure are perpendicular to the plane direction of the pipe structure; the fins are provided with holes, the condenser pipes pass through the holes, and the edges of the holes are pressed against the outer walls of the condenser pipes; the fins can increase the contact area between the condenser pipes and the air, improve the heat dissipation efficiency of the heat exchange row, save the energy required by the forward-reverse fan, ensure heat transfer between the outer walls of the condenser pipes and the fins, and quickly dissipate the heat in the condenser pipes, thereby improving the heat dissipation efficiency of the heat exchange row.

[0032] Preferably, the fins are made of copper; the thickness of the fins is 0.2-0.5 cm; and the spacing of the fins is 3-6 cm; to ensure the heat conduction and dissipation effect of the fins.

[0033] Preferably, the air outlet cover is provided with a filter screen, and the other air outlet cover is provided with another filter screen; further comprising a dust removal device, the dust removal device is provided with an air compressor; the air outlet pipeline of the air compressor is provided with two air outlets, and two rotating nozzles are respectively connected to the two air outlets; one rotating nozzle is directed to the upper filter screen, and the other rotating nozzle is directed to the lower another filter screen; the two rotating nozzles are arranged in the central air conditioner outdoor unit; by arranging the filter screen and the other filter screen on the air outlet and the other air outlet, and further arranging the dust removal device for dust removal of the filter screen and the other filter screen, dust falling on the condensate pipeline of the heat exchange row is avoided to affect the heat exchange effect of the condensate pipeline, and the filter screen and the other filter screen are prevented from being blocked by dust, so that the heat exchange efficiency of the heat exchange row during long-time operation is ensured, thereby reducing the energy consumption of the central air conditioner outdoor unit.

[0034] Preferably, a metal screen cover covering the filter screen is arranged above the air outlet; and another metal screen cover covering the other filter screen is arranged below the other air outlet; by arranging the metal screen cover and the other metal screen cover, foreign matters are prevented from falling into the central air conditioner outdoor unit, and the continuous operation effect of the central air conditioner outdoor unit is improved.

[0035] Preferably, the dust removal device is further provided with an infrared opposite-acting switch, the sensor of the infrared opposite-acting switch is an infrared opposite-acting sensor, the control signal output end of the infrared opposite-acting switch is connected to the air compressor in control, and the infrared opposite-acting sensor is provided with two pairs of infrared emitting elements and infrared receiving elements arranged in an opposite-acting structure, one pair of the infrared emitting elements and the infrared receiving elements are arranged on both sides of the filter screen, and the other pair of the infrared emitting elements and the infrared receiving elements are arranged on both sides of the other filter screen; the infrared opposite-acting switch can automatically identify whether the filter screen and the other filter screen are blocked, and then start the air compressor, the air compressor supplies high-pressure air to the rotating nozzle, and the air jet of the rotating nozzle removes the dust on the two filter screens, thereby automatically removing the dust on the filter screen and the other filter screen, ensuring the continuous heat exchange effect of the condensate pipeline of the central air conditioner outdoor unit, thereby ensuring the heat exchange efficiency of the heat exchange row during long-time operation, and reducing the energy consumption of the central air conditioner outdoor unit.

[0036] Preferably, the rotating nozzle comprises a sleeve, a guide pipe is arranged on the side surface of the sleeve, one end of the guide pipe is communicated with the inner cavity of the sleeve, and air injection ports are arranged on the guide pipe; the included angle between the air injection direction of the air injection port and the tangent direction of the rotation of the rotating nozzle is 60°-85°, and the air injection of the air injection port provides the rotation power of the rotating nozzle; by arranging the guide pipe, the inclined air injection port is arranged on the guide pipe, the air injection of the air injection port can drive the rotating nozzle to rotate, and a large-area filter screen can be cleaned without manual adjustment of the air injection position, thereby saving time and effort.

[0037] Preferably, the air compressor further comprises a sealed bearing, an outer ring of the sealed bearing is embedded in the sleeve; the air outlet pipe is inserted into an inner ring of the sealed bearing, so that the air outlet pipe is connected with the air jet; the sealed bearing prevents air leakage at the rotating connection when the rotating air jet rotates, and prevents the air jet from not having enough air pressure to clean the dust on the filter screen and the other filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings. Among them:

[0039] Figure 1 The central air conditioner outdoor unit of the central air conditioner outdoor unit buoyancy convection energy-saving system provided by an embodiment of the present application is connected to the structure of the upper and lower connecting pipes;

[0040] Figure 2 The central air conditioner outdoor unit of the central air conditioner outdoor unit buoyancy convection energy-saving system provided by an embodiment of the present application is connected to the structure of the upper and lower connecting pipes;

[0041] Figure 3 The central air conditioner outdoor unit of the central air conditioner outdoor unit buoyancy convection energy-saving system provided by an embodiment of the present application is connected to the structure of the upper and lower connecting pipes;

[0042] Figure 4 The central air conditioner outdoor unit of the central air conditioner outdoor unit buoyancy convection energy-saving system provided by an embodiment of the present application is connected to the structure of the upper and lower connecting pipes. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0044] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the scope of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0045] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0046] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0047] Example 1

[0048] Reference Figures 1-4 The central air conditioning outdoor unit buoyancy convection energy-saving system includes a heat exchange busbar 2 formed by coiled refrigerant pipes and a control system that drives the central air conditioning outdoor unit 1. The control system has a microprocessor system.

[0049] The buoyancy convection energy-saving system of the outdoor unit 1 of the central air conditioner includes a heat exchange busbar 2 formed by coiling refrigerant pipes and a control system that drives the outdoor unit 1 of the central air conditioner. The control system has a microprocessor system.

[0050] The outdoor unit 1 of the central air conditioner is provided with two air outlets. One air outlet is located above the outdoor unit 1 and above the heat exchanger 2, and the other air outlet is located below the outdoor unit 1 and below the heat exchanger 2.

[0051] The control system controls the heat exchange fan of the outdoor unit;

[0052] The outdoor unit's heat exchange fan adopts a forward and reverse rotation fan 3, which is positioned upwards;

[0053] The forward rotation state of the reversible fan 3 is the forward working state of upward exhaust, and the reverse rotation state of the reversible fan 3 is the reverse working state of downward exhaust.

[0054] The forward and reverse fan 3 is connected to the control system via a forward switch and a reverse switch;

[0055] The cooling switch of the control system is linked to the forward rotation switch of the reversible fan 3;

[0056] The heating switch of the control system is linked to the reverse switch of the forward and reverse fan 3;

[0057] The system includes a ventilation duct 4, which is provided with an air outlet and an air inlet 43. The air outlet of the central air conditioning outdoor unit 1 is connected to the air inlet 43, and a gap is left between the air inlet 43 and the air outlet.

[0058] It also includes a wind-powered negative pressure system, which includes a wind collection structure 41;

[0059] The air collection structure 41 is configured as a horn-shaped air collection structure 41 with a large opening area at one end and a small opening area at the other end. The end with the large opening area of ​​the air collection structure 41 serves as the air inlet, and the other end with the small opening area serves as the air outlet.

[0060] The air collection structure 41 has an opening on the lower side of one end of the air outlet as an air intake.

[0061] The air collection structure 41 is a horizontal plane on the lower side of the air outlet end at the air inlet.

[0062] The air intake is a horizontally positioned opening;

[0063] The air outlet and the air inlet are connected;

[0064] A one-way valve with the direction of conduction towards the air intake is installed between the air vent and the air intake above the outdoor unit 1 of the central air conditioner.

[0065] Each ventilation duct 4 is equipped with 4 air collection structures 41. The air outlets of the four air collection structures 41 are connected together, and the air inlets of the four air collection structures 41 are integrated into one. The two opposite air collection structures 41 are directly connected.

[0066] Firstly, the outdoor unit 1 of the central air conditioner is equipped with two air vents and an upward-facing reversible fan 3. When the air conditioner is cooling, the reversible fan 3 turns to the upward exhaust mode, and the hot air rises and is discharged from the upper air vent of the outdoor unit 1. When the air conditioner is heating, the reversible fan 3 turns to the downward exhaust mode, and the cold air sinks and is easily discharged from the lower air vent of the outdoor unit 1. This improves the efficiency of the outdoor unit 1 in discharging hot and cold air. Thermodynamic buoyancy is used to discharge hot air upward and cold air downward when discharging hot or cold air, thereby reducing the energy consumption of the outdoor unit 1. Secondly, the forward and reverse fan 3 is connected to the control system via forward and reverse switches, enabling the control system to automatically switch to the reverse working state of downward exhaust or the forward working state of upward exhaust in cooling or heating modes. The automatic switching of the control system is convenient and quick. Finally, by setting up a negative pressure system, the air intake of the air collection structure 41 provides suction when the central air conditioner is cooling, providing a certain suction effect at the upper air outlet. This greatly saves the energy of the fan when the central air conditioner is cooling. A gap is left between the air inlet 43 and the air outlet to prevent the effect of the outdoor unit 1 of the air conditioner from being affected when switching the connection air outlet.

[0067] The central air conditioning outdoor unit 1 also includes an upper connecting pipe 11 connected to the upper air vent of the central air conditioning outdoor unit 1, and a lower connecting pipe 12 connected to another air vent below the central air conditioning outdoor unit 1; the air inlet of the ventilation duct is an up-and-down movable air inlet 43; the ventilation duct 4 is also provided with an up-and-down telescopic mechanism 42 for driving the movement of the ventilation duct 4; the drive motor of the up-and-down telescopic mechanism 42 is connected to the control system through an up-moving switch and a down-moving switch; the up-moving switch of the drive motor is linked to the cooling switch of the control system. When the cooling switch is activated, the up-moving switch activates the drive motor to drive the air inlet 43 to move upward, and the air inlet 43 connects with the upper connecting pipe 11. The drive motor's downward switch is linked to the control system's heating switch. When the heating switch is activated, the downward switch activates the drive motor, driving the air inlet 43 to move downwards. The air inlet 43 connects to the lower connecting pipe 12. By setting up a negative pressure system, when the central air conditioning is cooling, the air intake of the air collecting structure 41 provides suction, providing a certain suction effect at the upper air outlet. When the central air conditioning is heating, the air intake of the air collecting structure 41 provides suction, providing a certain suction effect at another lower air outlet. This improves the exhaust effect of the outdoor unit 1 during both cooling and heating, thereby saving energy for the motor of the outdoor unit 1.

[0068] The ventilation duct 4 is located at a height greater than 10 meters and less than 100 meters above the ground, ensuring that the ventilation duct 4 can be installed on the outdoor unit 1 of the air conditioner and can function on the outdoor unit 1 of the central air conditioner.

[0069] The ratio of the diameter of the air inlet of the horn-shaped air collecting structure 41 to the depth of the air inlet to the air outlet of the air collecting structure 41 is greater than 0.4:1 and less than 1.6:1.

[0070] Two reversible fans 3 are provided. One reversible fan 3 is located at the air vent above the central air conditioner outdoor unit 1, and the other reversible fan 3 is located at another air vent below the central air conditioner outdoor unit 1. The reversible fan 3 is located above the heat exchange duct 2. The other reversible fan 3 is located below the heat exchange duct 2. The provision of two reversible fans 3 improves the heat exchange efficiency of the central air conditioner outdoor unit 1 and prevents hot or cold air from accumulating inside the central air conditioner outdoor unit 1.

[0071] The distance between the reversible fan 3 and the upper side of the heat exchanger 2 is 30-50 cm; the distance between the other reversible fan 3 and the lower side of the heat exchanger 2 is 30-50 cm; the distance of 30-50 cm ensures that the airflow from the reversible fan 3 can cover the heat exchanger 2, blowing away hot and cold air, and ensuring high-efficiency heat exchange of the central air conditioning outdoor unit 1.

[0072] When in use, when the central air conditioning cools the indoor temperature in hot weather, the outdoor unit 1 of the central air conditioning needs to expel the heat transported by the refrigerant pipe. The cooling switch controlled by the control system is turned on, and the cooling switch controls the forward rotation switch of the forward and reverse fan 3 to be turned on. Both forward and reverse fans 3 exhaust air upward, and the outdoor unit 1 of the central air conditioning exhausts air upward, which facilitates the rapid expulsion of hot air. At the same time, the downward switch starts the drive motor to drive the air inlet 43 to move downward. When the lower air inlet 43 moves to the lower end, it connects with the lower connecting pipe 12, providing additional air intake capacity at the lower air outlet. The hot air moves upward and the hot air is less likely to accumulate in the outdoor unit 1 of the air conditioning, which improves the heat dissipation efficiency and saves energy of the outdoor unit 1 of the central air conditioning.

[0073] When the central air conditioning system heats the indoor temperature in cold weather, the outdoor unit 1 needs to expel the cold air transported by the refrigerant pipe. The heating switch controlled by the control system is turned on, and the heating switch controls the reverse switch of the forward and reverse fans 3 to turn on. Both forward and reverse fans 3 exhaust air downwards. The outdoor unit 1 exhausts air downwards, which quickly expels the sinking cold air. At the same time, the upward switch starts the drive motor to drive the air inlet 43 to move upwards. When the upper air inlet 43 moves to the upper connecting pipe 11, it connects with the upper air outlet, providing an additional suction effect at the upper air outlet. The sinking cold air is also less likely to condense and accumulate, saving energy of the outdoor unit 1.

[0074] Example 2

[0075] Reference Figure 3 and Figure 4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0076] Preferably, the heat exchanger 2 is provided with a pipe structure consisting of at least three layers of refrigerant pipes coiled horizontally, with the upper and lower layers of pipe structure connected in sequence; the pipe structure of at least three layers increases the contact area between the refrigerant pipes and the air when the air flows through the heat exchanger 2, thereby improving the heat dissipation efficiency of the heat exchanger 2 and saving the energy required by the forward and reverse rotating fan 3.

[0077] The heat exchanger 2 includes a heat exchanger structure with heat sinks arranged in a finned pattern. The surface of the heat sink is perpendicular to the plane of the pipe structure. Holes are arranged in the heat sinks, through which the condensate pipe passes, and the edges of the holes are pressed against the outer wall of the condensate pipe. The heat sinks can increase the contact area between the condensate pipe and the air, improve the heat dissipation efficiency of the heat exchanger 2, thereby saving the energy required by the reversible fan 3, ensuring heat transfer between the outer wall of the condensate pipe and the heat sink, ensuring that the heat in the condensate pipe can be quickly dissipated, and improving the heat dissipation efficiency of the heat exchanger 2.

[0078] The heat sink is made of copper; the thickness of the heat sink is 0.2-0.5 cm; the spacing between the heat sinks is 3-6 cm; ensuring the heat conduction and heat dissipation effect of the heat sink.

[0079] The air vent is equipped with a filter screen 13, and the other air vent is equipped with another filter screen 13. It also includes a dust removal device, which is equipped with an air compressor 5. The air compressor 5's outlet pipe 51 has two outlets, each connected to a rotating nozzle 52. One rotating nozzle 52 faces the upward-facing filter screen 13, and the other rotating nozzle 52 faces the downward-facing filter screen 13. Both rotating nozzles 52 are located inside the central air conditioning outdoor unit 1. By installing filters 13 and another filter screen 13 on the air vent and the other air vent, and by providing a dust removal device for the filters 13 and the other filter screen 13, dust is prevented from falling onto the condensate pipe of the heat exchanger 2, affecting the heat exchange effect of the condensate pipe, while also preventing the filters 13 and the other filter screen 13 from being clogged by dust. This ensures the heat exchange efficiency of the heat exchanger 2 during long-term operation, thereby reducing the energy consumption of the central air conditioning outdoor unit 1.

[0080] A metal mesh cover is provided above the air vent to cover the filter 13; another metal mesh cover is provided below the other air vent to cover the other filter 13; by providing the metal mesh cover and the other metal mesh cover, debris is prevented from falling into the interior of the central air conditioning outdoor unit 1, thereby improving the continuous operation effect of the central air conditioning outdoor unit 1.

[0081] The dust removal device is also equipped with an infrared beam switch, and the sensor of the infrared beam switch is an infrared beam sensor. The control signal output terminal of the infrared beam switch is connected to the air compressor 5. The infrared beam sensor is equipped with two pairs of infrared emitting elements and infrared receiving elements arranged in a beam-to-beam configuration. One pair of infrared emitting elements and infrared receiving elements is located on both sides of the filter screen 13, and the other pair of infrared emitting elements and infrared receiving elements is located on both sides of the other filter screen 13. The infrared beam switch can automatically identify whether the filter screen 13 and the other filter screen 13 are blocked, and then start the air compressor 5. The air compressor 5 supplies high-pressure air to the rotary nozzle 52. The rotary nozzle 52 sprays air to remove dust from the two filter screens 13, automatically removing dust from the filter screens 13 and the other filter screen 13, ensuring the continuous heat exchange effect of the refrigerant pipe of the central air conditioning outdoor unit 1, thereby ensuring the heat exchange efficiency of the heat exchange tube 2 during long-term operation, and thus reducing the energy consumption of the central air conditioning outdoor unit 1.

[0082] The rotating nozzle 52 includes a sleeve, and a guide tube is provided on the side of the sleeve. One end of the guide tube is connected to the inner cavity of the sleeve. Air jets are arranged on the guide tube. The angle between the air jet direction of the air jets and the tangent direction of the rotation of the rotating nozzle 52 is 60°-85°. The air jets provide the rotational power for the rotating nozzle 52. By providing a guide tube with inclined air jets, the air jets can drive the rotating nozzle 52 to rotate, which can clean a large area of ​​filter screen without the need for manual adjustment of the air jet position, saving time and effort.

[0083] Preferably, the air compressor 5 further includes a sealed bearing, the outer ring of which is embedded in the sleeve; the air outlet pipe 51 is inserted into the inner ring of the sealed bearing, thereby connecting the air outlet pipe 51 to the air jet nozzle; the sealed bearing is used to prevent air leakage at the rotating connection when the rotating nozzle 52 rotates, and to prevent insufficient air pressure from the air jet nozzle to clean the dust on the filter screen 13 and the other filter screen 13.

[0084] During use, the two air vents of the outdoor unit 1 of the central air conditioner are positioned vertically, making it easy for dust to be drawn in. Dust can affect the heat exchange efficiency of the heat exchanger 2. Filter 13 and another filter 13 can filter out the dust, ensuring the cleanliness of the air entering the outdoor unit 1 of the central air conditioner. This ensures the heat exchange efficiency of the heat exchanger 2 during long-term operation. The at least three-layer pipe structure increases the contact area between the refrigerant pipe and the air when the air flows through the heat exchanger 2. The heat sink can also increase the contact area between the refrigerant pipe and the air, ensuring heat transfer between the outer wall of the refrigerant pipe and the heat sink, improving the heat dissipation efficiency of the outdoor unit 1 of the central air conditioner, thereby reducing the energy consumption of the outdoor unit 1 of the central air conditioner.

[0085] The dust removal device is equipped with an air compressor 5. The air compressor 5 generates high-pressure gas, which is connected to two rotating nozzles 52 through two air outlets on the air outlet pipe 51. The two air outlets are connected to the sleeve and then ejected from the air nozzle through the duct. The ejected high-pressure gas can clean the dust on the two filter screens 13. Because the air jet direction of the air jet is at an angle of 60°-85° with the rotation tangent direction of the rotating nozzle 52, the air jet will generate a driving force. The duct acts as a lever arm to push the rotating nozzle 52 to rotate. The rotation of the rotating nozzle 52 increases the cleaning area of ​​the filter screen 13. When the rotating nozzle 52 rotates, the sealed bearing ensures that the rotating nozzle 52 will not leak air or depressurize at the rotation point.

[0086] Two pairs of infrared photoelectric switches continuously monitor the dust blockage of the two filters 13. The infrared photoelectric switches control the air compressor 5 to turn on or off based on the signals from the infrared photoelectric sensors. When the infrared rays emitted by the infrared photoelectric sensors are blocked by dust, the infrared photoelectric switches control the air compressor 5 to turn on, and high-pressure gas enters the two rotating nozzles 52 to spray and clean the two filters 13. When the dust is cleaned, the infrared photoelectric switches turn off the air compressor 5 based on the signals from the infrared photoelectric sensors. The cleaning of the filters 13 is complete, ensuring that the heat exchanger 2 does not lose its heat exchange effect during long-term operation and reducing the energy consumption of the central air conditioning outdoor unit 1 during long-term operation.

[0087] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novelty and advantages of the subject matter described in this application. For example, variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise changed, and the nature or number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0088] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments, i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention, may be omitted.

[0089] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A buoyancy convection energy-saving system for a central air conditioning outdoor unit, comprising a heat exchange duct formed by coiled refrigerant pipes and a control system for driving the central air conditioning outdoor unit, the control system having a microprocessor system, characterized in that: The outdoor unit of the central air conditioning system is equipped with two air vents. One air vent is located above the outdoor unit and above the heat exchanger, and the other air vent is located below the outdoor unit and below the heat exchanger. The control system controls the heat exchange fan of the outdoor unit; The outdoor unit's heat exchange fan is a reversible fan, and the reversible fan is positioned upwards; The forward rotation state of the fan is the upward exhaust state, and the reverse rotation state is the downward exhaust state. The forward and reverse fan is connected to the control system via a forward switch and a reverse switch; The cooling switch of the control system is linked to the forward rotation switch of the reversible fan; The heating switch of the control system is linked to the reverse switch of the forward and reverse fan; It includes a ventilation duct, which is provided with an air outlet and an air inlet. The air vent above the outdoor unit of the central air conditioner is connected to the air inlet, and a gap is left between the air inlet and the air vent. It also includes a wind-powered negative pressure system, which includes a wind collection structure; The air collection structure is configured as a horn-shaped air collection structure with a large opening area at one end and a small opening area at the other end. The end with the large opening area serves as the air inlet, and the other end with the small opening area serves as the air outlet. The air collection structure has an opening on the lower side of one end of the air outlet as an air intake. The air collection structure is a horizontal plane on the lower side of the air outlet at the air inlet. The air intake is a horizontally positioned opening; The air outlet and the air inlet are connected; A one-way valve with the direction of conduction towards the air intake is installed between the air vent and the air intake on the top of the outdoor unit of the central air conditioner. Each ventilation duct is equipped with four air collection structures. The air outlets of the four air collection structures are connected together, and the air inlets of the four air collection structures are combined into one. The two opposite air collection structures are directly connected. The outdoor unit of the central air conditioning unit also includes an upper connecting pipe connected to the upper air vent of the outdoor unit and a lower connecting pipe connected to another air vent below the outdoor unit. The air inlet of the ventilation duct is an up-and-down movable air inlet; The ventilation duct is also equipped with an up-and-down telescopic mechanism that drives the air inlet to move. The drive motor of the vertical telescopic mechanism is connected to the control system via an upward switch and a downward switch; The upward movement switch of the drive motor is linked to the cooling switch of the control system. When the cooling switch is activated, the upward movement switch activates the drive motor to drive the air inlet to move upward, and the air inlet connects with the upper connecting pipe. The downward movement switch of the drive motor is linked to the heating switch of the control system. When the heating switch is activated, the downward movement switch activates the drive motor to drive the air inlet to move downward, and the air inlet connects with the lower pipe.

2. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 1, characterized in that: The ventilation duct is located at a height greater than 10 meters and less than 100 meters above the ground.

3. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 1, characterized in that: The ratio of the inlet diameter of the horn-shaped air collection structure to the depth of the air collection structure from the inlet to the outlet is greater than 0.4:1 and less than 1.6:

1.

4. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 1, characterized in that: There are two reversible fans. One reversible fan is located at the air vent above the central air conditioner outdoor unit, above the heat exchanger. The other reversible fan is located at another air vent below the central air conditioner outdoor unit, below the heat exchanger.

5. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 4, characterized in that: The distance between the forward and reverse fan and the upper side of the heat exchanger is 30-50 cm; The distance between the other reversible fan and the lower side of the heat exchanger is 30-50 cm.

6. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 1, characterized in that: The heat exchanger is provided with a pipe structure consisting of at least three layers of refrigerant pipes coiled horizontally, with the upper and lower layers of pipe structure connected in sequence. The heat exchanger includes a heat exchanger structure with heat exchange fins arranged in a way that the surface of the heat exchange fins is perpendicular to the plane of the pipe structure. Holes are arranged in the heat exchange fins, and the refrigerant pipe passes through the holes, with the edges of the holes pressed against the outer wall of the refrigerant pipe.

7. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 1, characterized in that: The wind mask is equipped with a filter screen, and the other wind mask is equipped with another filter screen; It also includes a dust removal device, which is equipped with an air compressor; The air compressor's outlet pipe has two outlets, and two rotating nozzles are connected to each outlet. One rotating nozzle faces the upward-facing filter, and another rotating nozzle faces the downward-facing filter. Both rotating nozzles are located inside the outdoor unit of the central air conditioning system.

8. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 7, characterized in that: The dust removal device is also equipped with an infrared beam switch, and the sensor of the infrared beam switch is an infrared beam sensor. The control signal output terminal of the infrared beam switch controls the connection to the air compressor. The infrared through-beam sensor has two pairs of infrared emitting elements and infrared receiving elements arranged in a through-beam configuration. One pair of infrared emitting elements and infrared receiving elements is located on both sides of the filter screen, and the other pair of infrared emitting elements and infrared receiving elements is located on both sides of the other filter screen.

9. The central air conditioning outdoor unit buoyancy convection energy-saving system according to claim 8, characterized in that: The rotating nozzle includes a sleeve, and a guide tube is provided on the side of the sleeve, one end of which is connected to the inner cavity of the sleeve; The duct is provided with air jets arranged in a row; The angle between the jet direction of the jet nozzle and the tangential direction of the rotation of the rotating nozzle is 60°-85°, and the jet from the jet nozzle provides the rotational power for the rotating nozzle.

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