Composite cooling air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, in particular to a composite cooling air conditioning system which comprises an outdoor heat exchange assembly, an indoor heat exchange assembly and a refrigerant power assembly. The outdoor heat exchange assembly comprises a cooling tower, a water-cooling heat exchanger and an air-cooling heat exchanger; the water-cooling heat exchanger is communicated with the air-cooling heat exchanger; a pre-cooling piece and a water supply assembly are arranged in the cooling tower; cooling liquid of the water supply assembly is in contact with the water-cooling heat exchanger after passing through the pre-cooling piece. An outdoor fan is arranged on the air outlet side of the air-cooled heat exchanger; and the pre-cooling piece is arranged between the air-cooling heat exchanger and the water-cooling heat exchanger. Refrigerant is firstly condensed and cooled in the air-cooling heat exchanger and then enters the water-cooling heat exchanger to be cooled for the second time, and the cooling mode of the water-cooling condenser is air cooling and water cooling, so that the temperature of the refrigerant is lower, the supercooling degree of the refrigerant in the system is improved, and the condensation enthalpy difference value of the refrigerant is increased; therefore, the whole system is more energy-saving in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a composite cooling air conditioning system. Background Art

[0002] In existing wet-film spray condenser solutions, outdoor air is first cooled by the wet film before reaching the condenser for heat exchange, while the inner condenser directly exchanges heat with the natural wind. Additionally, in existing air-cooled and spray condenser system solutions, water is sprayed directly on the condenser surface, achieving the dual effects of air and water cooling. However, these solutions have the following problems:

[0003] The air-cooled condenser has poor heat dissipation effect: When the ambient temperature is high, the air-cooled condenser has poor heat dissipation effect, resulting in a decrease in condensation effect, which in turn affects the energy efficiency ratio of the entire system.

[0004] The wet film spraying solution has limited effect: Although the wet film spraying solution can improve the heat exchange effect of the condenser to a certain extent, it also causes uneven heat exchange of the condenser and increases wind resistance, which cannot effectively improve the heat exchange efficiency of the entire machine.

[0005] Corrosion and waste of water resources: In air cooling and spraying systems, long-term use will cause corrosion of the heat exchanger, and the spraying process will also cause waste of water resources. Utility Model Content

[0006] The purpose of the utility model is to provide a composite cooling and air-conditioning system in view of the above-mentioned deficiencies in the prior art.

[0007] The purpose of the utility model is achieved through the following technical solutions: A composite cooling and air conditioning system includes an outdoor heat exchange component, an indoor heat exchange component, and a refrigerant power component arranged between the outdoor heat exchange component and the indoor heat exchange component;

[0008] The outdoor heat exchange assembly includes a cooling tower and a water-cooled heat exchanger and an air-cooled heat exchanger both provided in the cooling tower; the water-cooled heat exchanger is in communication with the air-cooled heat exchanger; a pre-cooling element and a water supply assembly are provided in the cooling tower; the coolant of the water supply assembly contacts the water-cooled heat exchanger after passing through the pre-cooling element;

[0009] An outdoor fan is provided on the air outlet side of the air-cooled heat exchanger; the pre-cooling component is provided between the air-cooled heat exchanger and the water-cooled heat exchanger; the outdoor fan is used to generate an airflow that flows through the water-cooled heat exchanger, the pre-cooling component and the air-cooled heat exchanger in sequence.

[0010] The utility model is further configured as follows: the water supply assembly includes a water receiving tray, a spray head, a water pump and a water supply pipe; the water receiving tray is connected to the spray head through the water pump and the water supply pipe; the water pump and the water supply pipe transmit the coolant to the spray head, and the coolant sprayed from the spray head contacts the water-cooled heat exchanger through the pre-cooling component and then flows back to the water receiving tray.

[0011] The present invention is further configured such that a water pressure sensor is provided between the water pump and the sprinkler head; and a conductivity sensor and a water level sensor are provided in the water receiving tray.

[0012] The utility model is further configured such that the water receiving tray is connected with a water filling pipe and a drainage pipe; the water filling pipe is provided with a water filling solenoid valve; the drainage pipe is provided with a drainage solenoid valve; and the top of the water receiving tray is connected with an overflow pipe.

[0013] The present invention is further configured as follows: the cooling tower is provided with a water-cooled air inlet on the air inlet side of the water-cooled heat exchanger; the cooling tower forms a connecting air duct between the water-cooled heat exchanger, the pre-cooling component and the air-cooled heat exchanger; the cooling tower is provided with an air-cooled air inlet on the air inlet side of the air-cooled heat exchanger; and an air valve is provided at the air-cooled air inlet.

[0014] The present invention is further configured such that an outdoor temperature sensor is provided at the water-cooled air inlet of the cooling tower.

[0015] The present invention is further configured such that the indoor heat exchange assembly includes an indoor heat exchanger and an indoor fan provided at the indoor heat exchanger;

[0016] The refrigerant power assembly includes a compressor; one end of the compressor is connected to one end of an air-cooled heat exchanger; the other end of the air-cooled heat exchanger is connected to one end of an indoor heat exchanger through a water-cooled heat exchanger; the other end of the indoor heat exchanger is connected to the other end of the compressor.

[0017] The utility model is further configured as follows: a first electric ball valve is provided between one end of the water-cooled heat exchanger and the other end of the air-cooled heat exchanger; a second electric ball valve is provided between the other end of the water-cooled heat exchanger and the other end of the air-cooled heat exchanger; a third electric ball valve is provided at the other end of the air-cooled heat exchanger; and the third electric ball valve is provided between the first electric ball valve and the second electric ball valve.

[0018] The utility model is further configured such that the refrigerant power assembly also includes a liquid reservoir and a refrigerant pump; one end of the water-cooled heat exchanger is connected to one end of the indoor heat exchanger through the first electric ball valve, the liquid reservoir and the refrigerant pump in sequence.

[0019] The present invention is further configured such that the refrigerant power assembly further includes a controller; both ends of the indoor heat exchanger are respectively connected to the controller; and a bypass solenoid valve is provided between the controller and one end of the indoor heat exchanger.

[0020] The beneficial effects of the present invention are as follows: the present invention first condenses and cools the refrigerant in an air-cooled heat exchanger, and then enters a water-cooled heat exchanger for a second cooling. The cooling method of the water-cooled condenser is air cooling and water cooling, which makes the refrigerant temperature lower, improves the supercooling degree of the refrigerant in the system, and increases the refrigerant condensation enthalpy difference, thereby making the entire system more energy-efficient during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without making any creative effort.

[0022] Figure 1 It is the system principle diagram of the utility model;

[0023] Figure 2 This is the system principle diagram of the utility model when the air valve of the outdoor heat exchange component is closed;

[0024] Figure 3 This is the system principle diagram of the utility model when the air valve of the outdoor heat exchange component is open;

[0025] Among them: 1. Cooling tower; 11. Pre-cooling component; 12. Water collection tray; 13. Sprinkler head; 14. Water pump; 15. Water supply pipe; 16. Outdoor temperature sensor; 21. Water pressure sensor; 22. Conductivity sensor; 23. Water level sensor; 24. Water injection pipe; 25. Water injection solenoid valve; 26. Drain pipe; 27. Drain solenoid valve; 28. Overflow pipe; 3. Water-cooled heat exchanger; 31. Water-cooled air inlet; 32. Connecting air duct; 4. Air-cooled heat exchanger; 41. Outdoor fan; 42. Air-cooled air inlet; 43. Air valve; 51. Indoor heat exchanger; 52. Indoor fan; 6. Compressor; 71. First electric ball valve; 72. Second electric ball valve; 73. Third electric ball valve; 81. Liquid reservoir; 82. Refrigerant pump; 9. Controller; 91. Bypass solenoid valve. DETAILED DESCRIPTION

[0026] The present invention will be further described with reference to the following embodiments.

[0027] Depend on Figure 1 and Figure 3 It can be seen that the composite cooling and air-conditioning system described in this embodiment includes an outdoor heat exchange component, an indoor heat exchange component, and a refrigerant power component provided between the outdoor heat exchange component and the indoor heat exchange component;

[0028] The outdoor heat exchange assembly includes a cooling tower 1 and a water-cooled heat exchanger 3 and an air-cooled heat exchanger 4, both of which are arranged in the cooling tower 1; the water-cooled heat exchanger 3 is connected to the air-cooled heat exchanger 4; a pre-cooling component 11 and a water supply component are provided in the cooling tower 1; the coolant of the water supply component contacts the water-cooled heat exchanger 3 after passing through the pre-cooling component 11; wherein the pre-cooling component 11 is a cooling filler;

[0029] An outdoor fan 41 is provided on the air outlet side of the air-cooled heat exchanger 4; the pre-cooling component 11 is provided between the air-cooled heat exchanger 4 and the water-cooled heat exchanger 3; the outdoor fan 41 is used to generate an airflow that flows through the water-cooled heat exchanger 3, the pre-cooling component 11 and the air-cooled heat exchanger 4 in sequence.

[0030] Specifically, in the composite cooling air-conditioning system described in this embodiment, when the system is running, the refrigerant power component drives the refrigerant to move between the outdoor heat exchange component, the indoor heat exchange component and the refrigerant power component; when the refrigerant passes through the outdoor heat exchange component, the wind generated by the outdoor fan 41 enters from the cooling water tower, and the refrigerant is first condensed and cooled in the air-cooled heat exchanger 4, and then enters the water-cooled heat exchanger 3 for a second cooling. The cooling method of the water-cooled heat exchanger 3 is air cooling and water cooling, which makes the refrigerant temperature lower, increases the supercooling of the refrigerant in the system, and makes the enthalpy value of the refrigerant entering the indoor heat exchanger 51 smaller, which increases the unit refrigerant enthalpy difference during the operation of the entire system, can reduce the system refrigerant circulation volume, reduce the compressor power, and achieve high system energy efficiency, thereby making the entire system more energy-efficient during operation.

[0031] The composite cooling air-conditioning system described in this embodiment comprises a water receiving tray 12, a spray head 13, a water pump 14 and a water supply pipe 15; the water receiving tray 12 is connected to the spray head 13 via the water pump 14 and the water supply pipe 15; the water pump 14 and the water supply pipe 15 transmit the coolant to the spray head 13, and the coolant sprayed from the spray head 13 contacts the water-cooled heat exchanger 3 through the pre-cooling component 11 and then flows back to the water receiving tray 12.

[0032] Specifically, under the action of the water pump 14, the coolant in the water receiving tray 12 is transmitted from the water supply pipe 15 to the spray head 13, and then the spray head 13 sprays the coolant downward. After being cooled by the pre-cooling part 11, the coolant flows through the water-cooled heat exchanger 3, which can effectively take away the heat of the water-cooled heat exchanger 3, and under the action of gravity, the coolant flows back to the water receiving tray 12.

[0033] In the composite cooling and air-conditioning system described in this embodiment, a water pressure sensor 21 is provided between the water pump 14 and the sprinkler head 13; the above arrangement facilitates sensing the water pressure of the sprinkler head 13; a conductivity sensor 22 and a water level sensor 23 are provided in the water receiving tray 12; the above arrangement facilitates sensing the conductivity and liquid level of the coolant.

[0034] In the composite cooling air-conditioning system described in this embodiment, the water receiving pan 12 is connected to a water injection pipe 24 and a drainage pipe 26; the water injection pipe 24 is provided with a water injection solenoid valve 25; the above arrangement facilitates the replenishment of coolant to the water receiving pan 12; the drainage pipe 26 is provided with a drainage solenoid valve 27; the above arrangement facilitates the discharge of coolant to the water receiving pan 12; the top of the water receiving pan 12 is connected to an overflow pipe 28; the above arrangement can prevent the coolant in the water receiving pan 12 from overflowing.

[0035] In this embodiment, the composite cooling air conditioning system comprises an indoor heat exchange assembly including an indoor heat exchanger 51 and an indoor fan 52 disposed at the indoor heat exchanger 51; the refrigerant power assembly includes a compressor 6; one end of the compressor 6 is connected to one end of the air-cooled heat exchanger 4; the other end of the air-cooled heat exchanger 4 is connected to one end of the indoor heat exchanger 51 via the water-cooled heat exchanger 3; and the other end of the indoor heat exchanger 51 is connected to the other end of the compressor 6. Through the above arrangement, under the action of the compressor 6, the refrigerant can flow between the compressor 6, the indoor heat exchanger 51, the water-cooled heat exchanger 3, and the air-cooled heat exchanger 4.

[0036] In the composite cooling and air conditioning system described in this embodiment, a first electric ball valve 71 is provided between one end of the water-cooled heat exchanger 3 and the other end of the air-cooled heat exchanger 4; a second electric ball valve 72 is provided between the other end of the water-cooled heat exchanger 3 and the other end of the air-cooled heat exchanger 4; and a third electric ball valve 73 is provided at the other end of the air-cooled heat exchanger 4; the third electric ball valve 73 is provided between the first electric ball valve 71 and the second electric ball valve 72. With this arrangement, when the external temperature is sufficiently low, the second electric ball valve 72 can be controlled to close, while the first and third electric ball valves 71 and 73 can be controlled to open, thereby reducing resistance in the system pipelines.

[0037] In the composite cooling and air conditioning system described in this embodiment, the refrigerant power assembly further includes a liquid accumulator 81 and a refrigerant pump 82. One end of the water-cooled heat exchanger 3 is connected to one end of the indoor heat exchanger 51 via the first electric ball valve 71, the liquid accumulator 81, and the refrigerant pump 82. The provision of the refrigerant pump 82 in this embodiment enables it to operate alternately or in conjunction with the compressor 6. Because the refrigerant pump's power is lower than that of the compressor 6, the composite cooling and air conditioning system can achieve energy savings by increasing its operating time.

[0038] In the composite cooling air conditioning system described in this embodiment, the refrigerant power assembly further includes a controller 9 equipped with a liquid cooling pipeline. Both ends of the indoor heat exchanger 51 are connected to the liquid cooling pipeline of the controller 9. A bypass solenoid valve 91 is provided between the controller 9 and one end of the indoor heat exchanger 51. This arrangement facilitates heat dissipation and cooling of the controller 9, which is used to cool heat-generating electronic components such as the inverter within the controller 9. Furthermore, the bypass solenoid valve 91 provides load balancing.

[0039] In the composite cooling and air conditioning system described in this embodiment, the cooling tower 1 is provided with a water-cooled air inlet 31 on the air inlet side of the water-cooled heat exchanger 3; a connecting air duct 32 is formed between the water-cooled heat exchanger 3, the pre-cooling element 11, and the air-cooled heat exchanger 4; an air-cooled air inlet 42 is provided on the air inlet side of the air-cooled heat exchanger 4; and a damper 43 is provided at the air-cooled air inlet 42. In the composite cooling and air conditioning system described in this embodiment, the cooling tower 1 is provided with an outdoor temperature sensor 16 at the water-cooled air inlet 31. This arrangement facilitates sensing the temperature outside the cooling tower 1.

[0040] Specifically, the control logic of the composite cooling and air conditioning system described in this embodiment is:

[0041] When the outdoor temperature T detected by the outdoor temperature sensor 16 is greater than a°C, the air valve 43 is in a closed state during system operation, the water pump 14 of the cooling tower 1 is turned on, and the wind generated by the outdoor fan 41 enters from the water-cooled air inlet 31 of the cooling water tower, and flows through the water-cooled heat exchanger 3, the pre-cooling component 11 and the air-cooled heat exchanger 4 in sequence and is discharged from the air outlet side of the air-cooled heat exchanger 4. The refrigerant is first condensed and cooled in the air-cooled heat exchanger 4, and then enters the water-cooled heat exchanger 3 for a second cooling. The water-cooled condenser cooling method consists of air cooling and water cooling, which makes the refrigerant temperature lower, improves the supercooling of the refrigerant in the system, and increases the refrigerant condensation enthalpy difference, thereby making the entire system more energy-efficient during operation.

[0042] When a℃>the outdoor temperature T detected by the outdoor temperature sensor 16>b℃, the air valve 43 is in the open state when the system is running, and the water pump 14 of the cooling tower 1 is turned on. Because the wind resistance of the pre-cooling component 11 is large, the wind generated by the outdoor fan 41 enters from the air-cooled air inlet 42 of the cooling water tower, and the air flow does not pass through the water-cooled heat exchanger 3 and the pre-cooling component 11, so that the overall wind resistance is smaller and the power consumption of the outdoor fan 41 is smaller. The water-cooled heat exchanger 3 uses the natural heat exchange of the ambient temperature and the spray water passes through the pre-cooling component 11 and drips onto the surface of the water-cooled heat exchanger 3 to evaporate and cool down and take away heat. The refrigerant is first condensed and cooled in the air-cooled heat exchanger 4, and then enters the water-cooled condenser for a second cooling, which makes the refrigerant temperature lower, improves the supercooling of the refrigerant in the system, and increases the refrigerant condensation enthalpy difference. Due to the combination of the water-cooled heat exchanger 3 and the air-cooled heat exchanger 4, in a dual-system unit, only the compressor 6 of one system needs to be turned on, and the refrigerant pump 82 of the other system needs to be turned on to meet the cooling needs of the system. This combination of systems uses much less power than when the compressors 6 of both systems are turned on simultaneously. This makes the entire system more energy-efficient during operation.

[0043] When b℃>the outdoor temperature T detected by the outdoor temperature sensor 16, it means that the outdoor temperature is very low. At this time, the air valve 43 is open, and the air-cooled heat exchanger 4 has met the system's heat dissipation requirements. At this time, the air intake of the air-cooled heat exchanger 4 enters directly through the air valve 43, reducing the wind resistance in the water-cooled heat exchanger 3 and the pre-cooling component 11, thereby reducing the power of the outdoor fan 41. The system only needs to turn on the refrigerant pump 82 to circulate to meet the system's cooling requirements. In order to reduce the system resistance, the refrigerant no longer needs to enter the water-cooled heat exchanger 3 for secondary heat exchange, so that the second electric ball valve 72 is controlled to be closed, and the first electric ball valve 71 and the third electric ball valve 73 are opened; the system resistance can be reduced and the use of a low-power refrigerant pump 82 makes the power required for the entire system lower, achieving the energy-saving goal.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A composite cooling and air conditioning system, characterized in that: It includes an outdoor heat exchange component, an indoor heat exchange component, and a refrigerant power component arranged between the outdoor heat exchange component and the indoor heat exchange component; The outdoor heat exchange assembly comprises a cooling tower (1) and a water-cooled heat exchanger (3) and an air-cooled heat exchanger (4) both provided in the cooling tower (1); the water-cooled heat exchanger (3) is in communication with the air-cooled heat exchanger (4); a pre-cooling component (11) and a water supply assembly are provided in the cooling tower (1); the coolant of the water supply assembly contacts the water-cooled heat exchanger (3) after passing through the pre-cooling component (11); An outdoor fan (41) is provided on the air outlet side of the air-cooled heat exchanger (4); the pre-cooling component (11) is provided between the air-cooled heat exchanger (4) and the water-cooled heat exchanger (3); the outdoor fan (41) is used to generate an airflow that flows sequentially through the water-cooled heat exchanger (3), the pre-cooling component (11), and the air-cooled heat exchanger (4).

2. A composite cooling and air conditioning system according to claim 1, characterized in that: The water supply assembly comprises a water receiving tray (12), a spray head (13), a water pump (14) and a water supply pipe (15); the water receiving tray (12) is connected to the spray head (13) through the water pump (14) and the water supply pipe (15); the water pump (14) and the water supply pipe (15) transmit the cooling liquid to the spray head (13); the cooling liquid sprayed from the spray head (13) contacts the water-cooled heat exchanger (3) through the pre-cooling component (11) and then flows back to the water receiving tray (12).

3. A composite cooling and air conditioning system according to claim 2, characterized in that: A water pressure sensor (21) is provided between the water pump (14) and the spray head (13); and a conductivity sensor (22) and a water level sensor (23) are provided in the water receiving tray (12).

4. A composite cooling and air conditioning system according to claim 2, characterized in that: The water receiving tray (12) is connected to a water injection pipe (24) and a drainage pipe (26); the water injection pipe (24) is provided with a water injection solenoid valve (25); the drainage pipe (26) is provided with a drainage solenoid valve (27); and the top of the water receiving tray (12) is connected to an overflow pipe (28).

5. The composite cooling and air conditioning system according to claim 1, characterized in that: The cooling tower (1) is provided with a water-cooled air inlet (31) on the air inlet side of the water-cooled heat exchanger (3); the cooling tower (1) forms a connecting air duct (32) between the water-cooled heat exchanger (3), the pre-cooling component (11) and the air-cooled heat exchanger (4); the cooling tower (1) is provided with an air-cooled air inlet (42) on the air inlet side of the air-cooled heat exchanger (4); and an air valve (43) is provided at the air-cooled air inlet (42).

6. A composite cooling and air conditioning system according to claim 5, characterized in that: The cooling tower (1) is provided with an outdoor temperature sensor (16) at the water-cooling air inlet (31).

7. The composite cooling and air conditioning system according to claim 1, characterized in that: The indoor heat exchange component includes an indoor heat exchanger (51) and an indoor fan (52) arranged at the indoor heat exchanger (51); The refrigerant power assembly includes a compressor (6); one end of the compressor (6) is connected to one end of an air-cooled heat exchanger (4); the other end of the air-cooled heat exchanger (4) is connected to one end of an indoor heat exchanger (51) through a water-cooled heat exchanger (3); and the other end of the indoor heat exchanger (51) is connected to the other end of the compressor (6).

8. The composite cooling and air conditioning system according to claim 7, characterized in that: A first electric ball valve (71) is provided between one end of the water-cooled heat exchanger (3) and the other end of the air-cooled heat exchanger (4); a second electric ball valve (72) is provided between the other end of the water-cooled heat exchanger (3) and the other end of the air-cooled heat exchanger (4); a third electric ball valve (73) is provided at the other end of the air-cooled heat exchanger (4); and the third electric ball valve (73) is provided between the first electric ball valve (71) and the second electric ball valve (72).

9. The composite cooling and air-conditioning system according to claim 8, characterized in that: The refrigerant power assembly further includes a liquid accumulator (81) and a refrigerant pump (82); one end of the water-cooled heat exchanger (3) is connected to one end of the indoor heat exchanger (51) through the first electric ball valve (71), the liquid accumulator (81) and the refrigerant pump (82) in sequence.

10. The composite cooling and air-conditioning system according to claim 7, characterized in that: The refrigerant power assembly further includes a controller (9); both ends of the indoor heat exchanger (51) are respectively connected to the controller (9); and a bypass solenoid valve (91) is provided between the controller (9) and one end of the indoor heat exchanger (51).

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