Outdoor heat exchanger drip irrigation spraying system and air conditioner thereof

Abstract

The utility model discloses an outdoor heat exchanger drip irrigation spraying system and an air conditioner thereof, and belongs to the technical field of air conditioners, the outdoor heat exchanger drip irrigation spraying system comprises a main pipe, a plurality of branch pipes, tail end capillary pipes, patch type drip irrigation belts and a support, the main pipe is L-shaped and is fixed on a side face pipeline of an outdoor heat exchanger through the support, and the branch pipes are communicated with the main pipe. The side, facing the outdoor heat exchanger, of the branch pipe is connected with a plurality of tail end capillary pipes, and the tail end capillary pipes are connected with patch type drip irrigation belts. Cooling water and condensate water are evenly sprayed to the outdoor heat exchanger, the temperature of the outdoor heat exchanger is reduced, fins of the outdoor heat exchanger are cleaned, and the heat exchange efficiency of an outdoor unit is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to an outdoor heat exchanger drip irrigation spraying system and its air conditioning system. Background Technology

[0002] Currently, with people's increasing demand for comfort, the comfort of air conditioners has become a primary issue to be addressed in air conditioner development. Especially in recent years' high-temperature weather, stable cooling and improved energy efficiency of air conditioning systems under high-temperature conditions are key problems that need to be solved. Improving defrosting efficiency and reducing defrosting time under frosting conditions is also a pain point. Furthermore, cleaning the outdoor heat exchanger is another pain point, as current conventional outdoor unit self-cleaning modes are insufficient for cleaning effectiveness. This patent adds an indoor unit condensate recovery system and an outdoor heat exchanger drip irrigation spraying system to multi-split air conditioning units, effectively solving these three pain points related to cooling, heating, and self-cleaning. Utility Model Content

[0003] The purpose of this utility model is to provide an outdoor heat exchanger drip irrigation and spraying system and its air conditioner, which solves the problems of dirty and clogged fins of existing outdoor units, unstable cooling efficiency under high temperature heating conditions, and low defrosting efficiency during frosting.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an outdoor heat exchanger drip irrigation system, comprising a main pipe, branch pipes, terminal capillary tubes, patch drip irrigation tape, and a bracket. The main pipe is L-shaped and is fixed to the side pipe of the outdoor heat exchanger by the bracket. There are several branch pipes that are connected to the main pipe. Several terminal capillary tubes are connected to the side of the branch pipe facing the outdoor heat exchanger, and the terminal capillary tubes are connected to the patch drip irrigation tape.

[0005] Preferably, the bracket is a clamp-type structure.

[0006] Preferably, the branch pipes are L-shaped and are arranged parallel to each other at equal intervals.

[0007] Preferably, the terminal capillaries are arranged in parallel at equal intervals.

[0008] This utility model also provides an air conditioner for an outdoor heat exchanger drip irrigation system, including a compressor, a gas-liquid separator, an outdoor heat exchanger, a four-way valve, an oil separator, an indoor heat exchanger, an outdoor unit electronic expansion valve, an indoor unit electronic expansion valve, a water tank, a water pump, a first valve, a second valve, and a water-cooled plate heat exchanger. The water tank is connected to the oil separator through the first valve and to the water pump through the second valve. The water pump is connected to the water-cooled plate heat exchanger through a pipeline, and the water-cooled plate heat exchanger is connected to the main pipe of the drip irrigation system through a pipeline.

[0009] Preferably, the indoor heat exchanger is connected to a water pump via a pipeline.

[0010] Preferably, the water tank has a heat storage and insulation layer on the outside and a water level and temperature sensor inside.

[0011] Preferably, a flow meter is provided between the water-cooled plate heat exchanger and the water pump.

[0012] Preferably, the first valve is a solenoid valve and the second valve is an electric ball valve.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. By adding a drip irrigation system, the mature embedded patch drip irrigation tape is introduced at the end using simulated drip irrigation technology. This can evenly spray cooling water and condensate onto the outdoor heat exchanger, reduce the temperature of the outdoor heat exchanger, clean the fins of the outdoor heat exchanger, and improve the heat exchange efficiency of the outdoor unit.

[0015] 2. The condensate from the indoor unit can be recycled and circulated to the drip irrigation system by a water pump, improving the unit's energy efficiency;

[0016] 3. By using heat storage materials to ensure the water temperature in the tank, when the defrosting requirements are met, defrosting is carried out simultaneously through warm water drip irrigation and air heat exchange. At the same time, during defrosting, the water circuit absorbs heat through the surface of the compressor, which improves defrosting efficiency, reduces defrosting time, and improves the unit's heating capacity.

[0017] 4. By measuring the flow rate and the return air temperature and humidity of the indoor unit, the cooling water drainage volume can be estimated, and water can be replenished to the water tank in a timely manner to ensure the amount of water sprayed at the terminal drip irrigation and ensure the outdoor heat exchange effect.

[0018] 5. An additional water-cooled refrigerant plate heat exchanger assembly has been added, which can effectively absorb the cooling capacity of the indoor unit's condensate water, improve the unit's subcooling, and reduce the noise of refrigerant flow in the indoor unit;

[0019] 6. The added cooling water circuit surrounds the compressor body, which can effectively reduce the surface temperature of the compressor, cool it down quickly, and improve the reliability of the compressor motor;

[0020] 7. The added condensate + water tank replenishment circulation is not limited by the unit's status, making it flexible to use, with a large and uniform water output and high cleaning efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the drip irrigation and spraying system in Example 1;

[0022] Figure 2 This is a schematic diagram of another overall structure of the drip irrigation and spraying system in Example 1;

[0023] Figure 3 This is a schematic diagram of the air conditioning system in Example 2.

[0024] In the diagram: 1. Main pipe; 2. Branch pipe; 3. Terminal capillary tube; 4. Patch-type drip irrigation tape; 5. Bracket; 6. Outdoor heat exchanger; 7. Compressor; 8. Gas-liquid separator; 9. Indoor heat exchanger; 10. Four-way valve; 11. Oil separator; 12. Outdoor unit electronic expansion valve; 13. Indoor unit electronic expansion valve; 14. Water-cooled medium plate heat exchanger; 15. Water tank; 16. Water pump; 17. First valve; 18. Second valve; 19. Flow meter; 20. Water level + temperature sensor; 21. Water inlet. Detailed Implementation

[0025] Example 1

[0026] See Figure 1-2 An outdoor heat exchanger drip irrigation system includes a main pipe 1, branch pipes 2, terminal capillary tubes 3, patch drip irrigation tape 4, and a bracket 5. The main pipe 1 is L-shaped and is installed on the side of the outdoor heat exchanger 6, and is fixed to the side pipe of the outdoor heat exchanger 6 by the bracket 5. Figure 1 As shown, the bracket 5 has a clamp-type structure, with one end clamping the main pipe 1 and the other end clamping the pipe of the outdoor heat exchanger 6. Several branch pipes 2 connect to the main pipe 1, also in an L-shape, and are arranged parallel to each other at equal intervals. They are located on one side of the heat exchange fins of the outdoor heat exchanger 6, with the number of branch pipes 2 sufficient to cover the heat exchange fins. Several end capillary tubes 3 are connected to the side of the branch pipes facing the outdoor heat exchanger 6. The end capillary tubes 3 are arranged parallel to each other at equal intervals, and each end capillary tube 3 is connected to a patch-type drip irrigation tape 4. The patch-type drip irrigation tape 4 can be purchased commercially; its specific structure will not be described in detail.

[0027] Example 2

[0028] This embodiment provides an air conditioner using the drip irrigation system of the outdoor heat exchanger in Embodiment 1. The existing structure of the air conditioner includes a compressor 7, a gas-liquid separator 8, an outdoor heat exchanger 6, a four-way valve 10, an oil separator 11, an indoor heat exchanger 9, an outdoor unit electronic expansion valve 12, an indoor unit electronic expansion valve 13, and a water-cooled plate heat exchanger 14. The compressor 7 is connected to the gas-liquid separator 8 and the oil separator 11. The oil separator 11 is connected to the four-way valve 10. The four-way valve 10 is connected to the outdoor heat exchanger 6, the gas-liquid separator 8, and the indoor heat exchanger 9. The outdoor heat exchanger 6 is connected to the outdoor unit electronic expansion valve 12. The outdoor unit electronic expansion valve 12 is connected to the water-cooled plate heat exchanger 14. The water-cooled plate heat exchanger 14 is connected to the indoor unit electronic expansion valve 13. The indoor unit electronic expansion valve 13 is connected to the indoor heat exchanger 9.

[0029] The air conditioning system further includes a water tank 15, a water pump 16, a first valve 17, and a second valve 18. The water tank 15 is connected to an oil separator 11 via the first valve 17, which is a solenoid valve. The water pump 16 is connected via the second valve 18, which is an electric ball valve. The water pump 16 is connected to a water-cooled plate heat exchanger 14 via a pipeline. The water-cooled plate heat exchanger 14 is connected to the main pipe 1 of the spray system via a pipeline. The pipeline between the water-cooled plate heat exchanger 14 and the main pipe 1 passes through the compressor 7 and is spirally wound around the outside of the compressor 7. The water receiving pan of the indoor heat exchanger 9 is also connected to a water pipe and connected to the water pump 16 for receiving condensate. A flow meter 19 is also installed between the water pump 16 and the water-cooled plate heat exchanger 14. The water tank 15 is equipped with a water level and temperature sensor 20, and has a heat storage insulation layer on the outside. It has a water inlet 21 at the top for timely replenishment of cooling water when the water tank 15 is short of water.

[0030] Reference Figure 3 Cooling mode:

[0031] When the indoor unit is running in cooling mode, based on the indoor unit's return air dry-bulb temperature Tg and the relative humidity RH measured by the humidity sensor, the dew point temperature Tr of the room where the indoor unit is running can be obtained by looking up a table through built-in calculation. When Tr < Th, Th is the dew point temperature of the indoor unit's return air side, and the outdoor unit's ambient temperature is Ta, the exhaust temperature is Td, and the exhaust pressure is Pd. The required water flow rate P1 is calculated as P1 = A * Pd * Td * + B * Ta, where A and B are calculation coefficients.

[0032] At this time, water pump 16 is running, electric ball valve is open, and solenoid valve remains closed. The opening of electric ball valve is adjusted according to the actual flow rate measured by flow meter 19 to ensure water flow. Water tank 15 can be alerted by water level and temperature sensor 20, and automatic water replenishment operation is activated. The cooling water of water tank 15 circulates through water tank 15 → water pump 16 → flow meter 19 → water-cooled medium plate heat exchanger 14 → compressor 7 → main pipe 1 → branch pipe 2 → terminal capillary tube 3 → patch drip irrigation tape 4.

[0033] Given the indoor unit return air dry bulb temperature Ti1, wet bulb temperature Ti2, outlet air dry bulb temperature To1, and outlet air wet bulb temperature To2, look up the inlet air moisture content d1 and outlet air moisture content d2. Then, look up the rated airflow F corresponding to the fan speed F0. The calculated dehumidification capacity is K*F*(d1-d2), where K is a correction coefficient. Referring to the measured water flow rate, adjust the opening of the electric ball valve. The indoor unit condensate and water tank replenishment flow sequentially through water pump 16 → flow meter 19 → water-cooled medium plate heat exchanger 14 → compressor 7 → main pipe 1 → branch pipe 2 → terminal capillary tube 3 → patch drip irrigation tape 4 to complete the water circulation.

[0034] The collected low-temperature condensate is passed through the water-cooled plate heat exchanger 14 to reduce the subcooling of the refrigerant at the indoor unit's inlet, thereby improving the indoor unit's cooling capacity. The condensate flows through the compressor 7, which reduces the compressor's body temperature and ensures the reliability of electrical components. Finally, the condensate mixture is evenly sprayed onto the outdoor heat exchanger 6 through a drip irrigation system for direct evaporation and cooling, which greatly improves the outdoor heat exchange effect, reduces exhaust pressure, and improves cooling efficiency.

[0035] Cleaning Mode:

[0036] When the unit is running normally, the outdoor unit speed F1, calculated based on the outdoor fan current signal, is compared with the preset fan speed Fo. If F1-Fo≤K for a continuous period of L hours, the indoor unit control panel will display a message indicating that the heat exchanger is clogged. When the indoor unit is set to self-cleaning function, the outdoor unit compressor 7 stops running, the water pump 16 starts running, the electric ball valve opens to its maximum, the flow target is set to maximum, and the outdoor unit fan runs at its maximum speed for N minutes before stopping.

[0037] Heating mode:

[0038] When the indoor unit is in heating mode, if the water level sensor detects a temperature below 5°C, the solenoid valve after oil separator 11 opens, entering heat storage protection control, and the electric ball valve of water tank 15 closes. If the water level sensor detects a temperature above 10°C, the solenoid valve after oil separator 11 closes, entering standby control.

[0039] When the outdoor unit heat exchanger temperature meets the defrosting control conditions, the electric ball valve of water tank 15 opens, and the water in water tank 15 circulates through water tank 15 → water pump 16 → flow meter 19 → water-cooled medium plate heat exchanger 14 → compressor 7 → main pipe 1 → branch pipe 2 → terminal capillary tube 3 → patch drip irrigation tape 4. After defrosting is completed based on the outdoor heat exchanger temperature, the solenoid valve after oil separator 11 closes, the electric ball valve of water tank 15 closes, and the system enters standby control.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An outdoor heat exchanger drip irrigation sprinkling system characterized by: The drip irrigation and spraying system comprises a main pipe, branch pipes, end capillary pipes, patch type drip irrigation belts and a support, the main pipe is L-shaped and is fixed on the side pipeline of an outdoor heat exchanger through the support, the branch pipes are communicated with the main pipe, the branch pipes are connected with the end capillary pipes on the side facing the outdoor heat exchanger, and the end capillary pipes are connected with the patch type drip irrigation belts.

2. The outdoor heat exchanger drip irrigation sprinkling system, as recited in claim 1, characterized in that: The support is a clamp type structure.

3. The outdoor heat exchanger drip irrigation sprinkling system, as recited in claim 1, characterized in that: The branch pipes are L-shaped structures and are arranged in parallel at equal intervals.

4. The outdoor heat exchanger drip irrigation sprinkling system, as recited in claim 1, characterized in that: The end capillary pipes are arranged in parallel at equal intervals.

5. An air conditioner using the drip irrigation spraying system of the outdoor heat exchanger according to any one of claims 1-4, comprising a compressor, a gas-liquid separator, an outdoor heat exchanger, a four-way valve, an oil separator, an indoor heat exchanger, an outdoor machine electronic expansion valve, and an indoor machine electronic expansion valve, characterized in that: The drip irrigation and spraying system further comprises a water tank, a water pump, a first valve, a second valve and a water cooling medium plate type heat exchanger, the water tank is connected with an oil separator through the first valve and is connected with the water pump through the second valve, the water pump is connected with the water cooling medium plate type heat exchanger through a pipeline, and the water cooling medium plate type heat exchanger is connected with the main pipe of the drip irrigation and spraying system through a pipeline.

6. The air conditioner of claim 5, wherein: The indoor heat exchanger is connected with the water pump through a pipeline.

7. The air conditioner according to claim 5, wherein: The water tank is externally provided with a heat storage and heat preservation layer and is internally provided with a water level + temperature sensing sensor.

8. The air conditioner of claim 5, wherein: A flow meter is arranged between the water cooling medium plate type heat exchanger and the water pump.

9. The air conditioner according to claim 5, wherein: The first valve is an electromagnetic valve, and the second valve is an electric ball valve.

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