High-energy-efficiency air-liquid fusion air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to a high-energy-efficiency air-liquid fusion air conditioner which comprises a first refrigerating system, a second refrigerating system, a liquid cooling heat exchanger, a water return port and a water supply port. The liquid cooling heat exchanger comprises a first heat exchange channel, a second heat exchange channel, a third heat exchange channel and a fourth heat exchange channel; the third heat exchange channel is communicated with the fourth heat exchange channel; the first refrigerating system comprises a first evaporator group; the second refrigerating system comprises a second evaporator group; an air flow channel, an air return port and an air supply port are further included; the first evaporator group is arranged close to the return air inlet; the second evaporator group is arranged close to the air supply outlet; the high-temperature return water and the high-temperature return air are cooled through the first refrigerating system firstly, so that the first refrigerating system can preferentially adopt a natural cooling working mode, namely, the first refrigerant pump is preferentially started, and the first compressor unit is shut down at the same time, so that the operation energy consumption can be reduced, and the working energy efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to a high-efficiency air-liquid fusion air conditioner. Background Technology

[0002] As an important piece of equipment in the field of air conditioning technology, the air-liquid fusion air conditioner is widely used in industrial production, data centers, large buildings and other scenarios. Its core function is to cool high-temperature return water into low-temperature water and then circulate it for supply through the cooperation of the refrigeration system and heat exchange channel.

[0003] In the liquid-cooled water supply scheme of air-liquid integrated air conditioning, high-temperature return water is usually directly introduced into multiple parallel heat exchange channels. The corresponding refrigeration system needs to simultaneously cool the high-temperature water to the target low temperature at one time. Under this design, a single refrigeration system has to bear the large temperature difference load between high-temperature water and low-temperature water. This not only causes the output power of the refrigeration system to fluctuate drastically and the working energy efficiency to be significantly lower, but also aggravates equipment wear due to long-term high temperature difference operation, increases operating energy consumption and subsequent maintenance costs, and is difficult to adapt to the current application requirements for energy conservation and emission reduction.

[0004] In the air-cooled solution of air-liquid integrated air conditioning, high-temperature return air is usually directly introduced into multiple parallel evaporators. The corresponding refrigeration system needs to simultaneously cool the high-temperature air to the target low temperature in one go. Under this design, a single refrigeration system has to bear the large temperature difference load between the high-temperature air and the low-temperature air. This not only causes the output power of the refrigeration system to fluctuate drastically and the operating energy efficiency to be significantly lower, but also aggravates equipment wear and tear due to long-term high temperature difference operation, increases operating energy consumption and subsequent maintenance costs, and is difficult to adapt to the current application requirements for energy conservation and emission reduction. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a high-efficiency air-liquid fusion air conditioner.

[0006] The objective of this invention is achieved through the following technical solution: a high-efficiency air-liquid fusion air conditioner, comprising a first refrigeration system, a second refrigeration system, a liquid-cooled heat exchanger, a return water inlet, and a supply water inlet; the liquid-cooled heat exchanger comprises a first heat exchange channel, a second heat exchange channel, a third heat exchange channel for exchanging heat with the first heat exchange channel, and a fourth heat exchange channel for exchanging heat with the second heat exchange channel. The return water inlet is connected to one end of the third heat exchange channel; the other end of the third heat exchange channel is connected to one end of the fourth heat exchange channel; the other end of the fourth heat exchange channel is connected to the water supply inlet. The first refrigeration system is connected to the first heat exchange channel; the second refrigeration system is connected to the second heat exchange channel; The first refrigeration system includes a first evaporator assembly, a first compressor assembly, and a first refrigerant pump; the second refrigeration system includes a second evaporator assembly, a second compressor assembly, and a second refrigerant pump; the high-efficiency air-liquid fusion air conditioner also includes an airflow channel; the airflow channel is provided with a return air inlet and a supply air inlet; a blower is provided at the supply air inlet; both the first evaporator assembly and the second evaporator assembly are located in the airflow channel; the first evaporator assembly is located near the return air inlet; the second evaporator assembly is located near the supply air inlet; The high-efficiency air-liquid fusion air conditioner includes mechanical refrigeration mode, partial economic mode and full economic mode. In mechanical refrigeration mode, the first compressor unit and the second compressor unit start, and the first refrigerant pump and the second refrigerant pump shut down; In some economic modes, the first refrigerant pump and the second compressor unit start up, and the first compressor unit and the second refrigerant pump shut down. In full economy mode, the first and second refrigerant pumps start, and the first and second compressor units shut down.

[0007] The present invention is further configured such that the first refrigeration system further includes a first condenser, a first expansion valve, and a third expansion valve assembly; the outlet of the first refrigerant pump is connected to one end of the first expansion valve; the other end of the first expansion valve is connected to one end of a first heat exchange channel; the other end of the first heat exchange channel is connected to one end of the first condenser; the other end of the first condenser is connected to the inlet of the first refrigerant pump; the outlet of the first compressor assembly is connected to one end of the first condenser; the inlet of the first compressor assembly is connected to the other end of the first heat exchange channel; one end of the third expansion valve assembly is connected to the outlet of the first refrigerant pump; the other end of the third expansion valve assembly is connected to one end of a first evaporator assembly; and the other end of the first evaporator assembly is connected to the inlet of the first compressor assembly. The second refrigeration system further includes a second condenser, a second expansion valve, and a fourth expansion valve assembly; the outlet of the second refrigerant pump is connected to one end of the second expansion valve; the other end of the second expansion valve is connected to one end of the second heat exchange channel; the other end of the second heat exchange channel is connected to one end of the second condenser; the other end of the second condenser is connected to the inlet of the second refrigerant pump; the outlet of the second compressor assembly is connected to one end of the second condenser; the inlet of the second compressor assembly is connected to the other end of the second heat exchange channel; one end of the fourth expansion valve assembly is connected to the outlet of the second refrigerant pump; the other end of the fourth expansion valve assembly is connected to one end of the second evaporator assembly; and the other end of the second evaporator assembly is connected to the inlet of the second compressor assembly.

[0008] The present invention is further configured such that the first refrigeration system further includes a first one-way valve and a second one-way valve; one end of the first one-way valve is connected to one end of the first condenser; the other end of the first one-way valve is connected to the other end of the first heat exchange channel and the other end of the first evaporator assembly respectively; the second one-way valve is connected in parallel with the second refrigerant pump. The second refrigeration system also includes a third check valve and a fourth check valve; one end of the third check valve is connected to one end of the second condenser; the other end of the third check valve is connected to the other end of the second heat exchange channel and the other end of the second evaporator assembly respectively; the fourth check valve is connected in parallel with the first refrigerant pump.

[0009] The present invention is further configured such that the first refrigeration system further includes a first exhaust fan disposed at the first condenser; and the second refrigeration system further includes a second exhaust fan disposed at the second condenser.

[0010] The present invention is further configured such that a first liquid storage tank is provided between the other end of the first condenser and the suction port of the first refrigerant pump; and a second liquid storage tank is provided between the other end of the second condenser and the suction port of the second refrigerant pump.

[0011] The present invention is further configured such that the outlet of the first refrigerant pump is provided with a first drying filter; and the outlet of the second refrigerant pump is provided with a second drying filter.

[0012] The present invention is further configured such that the first refrigeration system further includes a first gas-liquid separator; one end of the first gas-liquid separator is connected to the suction port of the first compressor unit; the other end of the first evaporator unit, the other end of the first heat exchange channel, and the other end of the first one-way valve are respectively connected to the other end of the first gas-liquid separator.

[0013] The second refrigeration system further includes a second gas-liquid separator; one end of the second gas-liquid separator is connected to the suction port of the second compressor unit; the other end of the second evaporator unit, the other end of the second heat exchange channel, and the other end of the third one-way valve are respectively connected to the other end of the second gas-liquid separator.

[0014] The present invention is further configured such that the first evaporator group includes a first left evaporator and a first right evaporator; the third expansion valve group includes a third left expansion valve and a third right expansion valve; the first left evaporator is connected to the third left expansion valve; the first right evaporator is connected to the third right expansion valve; the branch where the first left evaporator and the third left expansion valve are located and the branch where the first right evaporator and the third right expansion valve are located are connected in parallel; The second evaporator group includes a second left evaporator and a second right evaporator; the fourth expansion valve group includes a fourth left expansion valve and a fourth right expansion valve; the second left evaporator is connected to the fourth left expansion valve; the second right evaporator is connected to the fourth right expansion valve; the branch containing the second left evaporator and the fourth left expansion valve and the branch containing the second right evaporator and the fourth right expansion valve are connected in parallel.

[0015] The present invention is further configured such that the first compressor unit includes a first left compressor, a fifth left check valve, a first right compressor, and a fifth right check valve; the first left compressor is connected to the fifth left check valve; the first right compressor is connected to the fifth right check valve; the branch where the first left compressor and the fifth left check valve are located and the branch where the first right compressor and the fifth right check valve are located are connected in parallel; The second compressor unit includes a second left compressor, a sixth left check valve, a second right compressor, and a sixth right check valve; the second left compressor is connected to the sixth left check valve; the second right compressor is connected to the sixth right check valve; the branch containing the second left compressor and the sixth left check valve and the branch containing the second right compressor and the sixth right check valve are connected in parallel.

[0016] The present invention is further configured such that: a first water temperature sensor is provided at the return water inlet; a second water temperature sensor is provided between the third heat exchange channel and the fourth heat exchange channel; and a third water temperature sensor is provided at the water supply inlet. A first air temperature sensor is installed at the return air vent; a second air temperature sensor is installed between the first evaporator group and the second evaporator group; and a third air temperature sensor is installed at the air supply vent.

[0017] The beneficial effects of the present invention are as follows: The high-temperature return water and high-temperature return air of the present invention are first cooled by the first refrigeration system, so that the first refrigeration system can preferentially adopt the natural cooling working mode, that is, the first refrigerant pump is started first and the first compressor unit is shut down, thereby reducing the operating energy consumption and improving the working energy efficiency. Attached Figure Description

[0018] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0019] Figure 1 This is a system schematic diagram of the present invention; The components include: 1. Liquid-cooled heat exchanger; 11. First heat exchange channel; 12. Second heat exchange channel; 13. Third heat exchange channel; 14. Fourth heat exchange channel; 21. Return water inlet; 22. Supply water inlet; 31. First condenser; 32. First refrigerant pump; 33. First expansion valve; 34. First exhaust fan; 35. First liquid storage tank; 36. First dryer filter; 411. First left compressor; 412. Fifth left check valve; 413. First right compressor; 414. Fifth right check valve; 42. First check valve; 43. Second check valve; 44. First gas-liquid separator; 511. Third left expansion valve; 512. Third right expansion valve; 521. 521. First left evaporator; 622. First right evaporator; 61. Second condenser; 62. Second refrigerant pump; 63. Second expansion valve; 64. Second exhaust fan; 65. Second liquid receiver; 66. Second dryer filter; 711. Second left compressor; 712. Sixth left check valve; 713. Second right compressor; 714. Sixth right check valve; 72. Third check valve; 73. Fourth check valve; 74. Second gas-liquid separator; 811. Fourth left expansion valve; 812. Fourth right expansion valve; 821. Second left evaporator; 822. Second right evaporator; 9. Airflow duct; 91. Return air inlet; 92. Supply air outlet; 93. Supply fan. Detailed Implementation

[0020] The present invention will be further described in conjunction with the following embodiments.

[0021] Depend on Figure 1 As can be seen, the high-efficiency air-liquid fusion air conditioner described in this embodiment includes a first refrigeration system, a second refrigeration system, a liquid-cooled heat exchanger 1, a return water inlet 21, and a supply water inlet 22; the liquid-cooled heat exchanger 1 includes a first heat exchange channel 11, a second heat exchange channel 12, a third heat exchange channel 13 for exchanging heat with the first heat exchange channel 11, and a fourth heat exchange channel 14 for exchanging heat with the second heat exchange channel 12; The return water inlet 21 is connected to one end of the third heat exchange channel 13; the other end of the third heat exchange channel 13 is connected to one end of the fourth heat exchange channel 14; the other end of the fourth heat exchange channel 14 is connected to the water supply inlet 22. The first refrigeration system is connected to the first heat exchange channel 11; the second refrigeration system is connected to the second heat exchange channel 12; The first refrigeration system includes a first evaporator group, a first compressor group, and a first refrigerant pump 32; the second refrigeration system includes a second evaporator group, a second compressor group, and a second refrigerant pump 62; the high-efficiency air-liquid fusion air conditioner also includes an airflow channel 9; the airflow channel 9 is provided with a return air inlet 91 and an air supply outlet 92; a blower 93 is provided at the air supply outlet 92; both the first evaporator group and the second evaporator group are located in the airflow channel 9; the first evaporator group is located near the return air inlet 91; the second evaporator group is located near the air supply outlet 92; wherein the liquid-cooled heat exchanger 1 can be a plate heat exchanger or a shell-and-tube heat exchanger, etc. The high-efficiency air-liquid fusion air conditioner includes mechanical refrigeration mode, partial economic mode and full economic mode. In mechanical refrigeration mode, the first compressor unit and the second compressor unit start, and the first refrigerant pump 32 and the second refrigerant pump 62 are turned off. At this time, the high-efficiency air-liquid fusion air conditioner can produce the maximum cooling capacity, but the power consumption is also the highest. In some economic modes, the first refrigerant pump 32 and the second compressor unit are started, while the first compressor unit and the second refrigerant pump 62 are turned off. At this time, the high-efficiency air-liquid fusion air conditioner can generate a large amount of cooling capacity, but its power consumption is also high.

[0022] In full economy mode, the first refrigerant pump 32 and the second refrigerant pump 62 start, and the first compressor unit and the second compressor unit shut down. At this time, the high-efficiency air-liquid fusion air conditioner can produce a lower cooling capacity and consume less power.

[0023] Specifically, the high-efficiency air-liquid fusion air conditioner described in this embodiment sets up a first heat exchange channel 11, a second heat exchange channel 12, a third heat exchange channel 13, and a fourth heat exchange channel 14 in the liquid-cooled heat exchanger 1. The high-temperature return water first enters the third heat exchange channel 13 through the return water port 21 to be cooled by the refrigerant in the first heat exchange channel 11, and then enters the fourth heat exchange channel 14 to be cooled by the refrigerant in the second heat exchange channel 12 before being supplied with cold water from the water supply port 22.

[0024] In traditional liquid-cooled water supply systems, high-temperature return water is simultaneously cooled through both the first heat exchange channel 11 and the second heat exchange channel 12. This means both the first and second refrigeration systems need to cool the high-temperature water to a low-temperature level. The significant temperature difference between the high-temperature and low-temperature water results in low energy efficiency for both systems. In this embodiment, the high-temperature water first enters the third heat exchange channel 13 through the return port 21, where it is cooled by the refrigerant in the first heat exchange channel 11 to become medium-temperature water. Then, it enters the fourth heat exchange channel 14, where it is cooled by the refrigerant in the second heat exchange channel 12 to become low-temperature water. Finally, it is supplied as cold water from the supply port 22. For the first refrigeration system, the high-temperature water needs to be cooled to a medium-temperature level; for the second refrigeration system, the medium-temperature water needs to be cooled to a low-temperature level. This means the temperature difference that needs to be changed between the first and second refrigeration systems is smaller, resulting in more stable output power and higher energy efficiency.

[0025] In addition, the blower 93 drives air from the return air inlet 91 into the airflow channel 9. The air is first cooled by the first evaporator group near the return air inlet 91, and then further cooled by the second evaporator group near the air outlet 92. Finally, the cold air is delivered out from the air outlet 92. The layout of the first evaporator group, the second evaporator group and the airflow channel 9 are matched to form a gradient air cooling process. The gradient air cooling design makes the air supply temperature more uniform, and the blower 93 provides sufficient power for air flow, thereby improving the air cooling efficiency.

[0026] In addition, both high-temperature return water and high-temperature return air are cooled first through the first refrigeration system, so that the first refrigeration system can prioritize the natural cooling working mode, that is, prioritize the start of the first refrigerant pump 32 and shut down the first compressor unit, thereby reducing operating energy consumption and improving working efficiency.

[0027] This embodiment describes a high-efficiency air-liquid fusion air conditioner. The first refrigeration system further includes a first condenser 31, a first expansion valve 33, and a third expansion valve assembly. The outlet of the first refrigerant pump 32 is connected to one end of the first expansion valve 33. The other end of the first expansion valve 33 is connected to one end of the first heat exchange channel 11. The other end of the first heat exchange channel 11 is connected to one end of the first condenser 31. The other end of the first condenser 31 is connected to the inlet of the first refrigerant pump 32. The outlet of the first compressor assembly is connected to one end of the first condenser 31. The inlet of the first compressor assembly is connected to the other end of the first heat exchange channel 11. One end of the third expansion valve assembly is connected to the outlet of the first refrigerant pump 32. The other end of the third expansion valve assembly is connected to one end of the first evaporator assembly. The other end of the first evaporator assembly is connected to the inlet of the first compressor assembly. The second refrigeration system further includes a second condenser 61, a second expansion valve 63, and a fourth expansion valve assembly; the outlet of the second refrigerant pump 62 is connected to one end of the second expansion valve 63; the other end of the second expansion valve 63 is connected to one end of the second heat exchange channel 12; the other end of the second heat exchange channel 12 is connected to one end of the second condenser 61; the other end of the second condenser 61 is connected to the inlet of the second refrigerant pump 62; the outlet of the second compressor assembly is connected to one end of the second condenser 61; the inlet of the second compressor assembly is connected to the other end of the second heat exchange channel 12; one end of the fourth expansion valve assembly is connected to the outlet of the second refrigerant pump 62; the other end of the fourth expansion valve assembly is connected to one end of the second evaporator assembly; and the other end of the second evaporator assembly is connected to the inlet of the second compressor assembly.

[0028] Specifically, in the first refrigeration system, the first refrigerant pump 32 draws in refrigerant from the first condenser 31, and after being discharged through the outlet of the first refrigerant pump 32 to the first expansion valve 33 for throttling and cooling, it is introduced into the first heat exchange channel 11 to exchange heat with the return water in the third heat exchange channel 13. The refrigerant after heat exchange flows back to the first condenser 31 for cooling, forming a closed loop. Similarly, in the second refrigeration system, the second refrigerant pump 62, the second expansion valve 63, the second condenser 61 and the second heat exchange channel 12 work together to complete the heat exchange cycle with the return water in the fourth heat exchange channel 14. In addition, the first compressor unit provides power to the first refrigeration system, compressing the low-pressure refrigerant after heat exchange into high-pressure, high-temperature gas and sending it into the first condenser 31 to improve the refrigerant condensation efficiency.

[0029] In addition, the refrigerant discharged by the first refrigerant pump 32 is divided into two paths: one path enters the first heat exchange channel 11 through the first expansion valve 33, and the other path enters the first evaporator group after being throttled by the third expansion valve group; similarly, the refrigerant discharged by the second refrigerant pump 62 is divided into two paths: one path enters the second heat exchange channel 12 through the second expansion valve 63, and the other path enters the second evaporator group through the fourth expansion valve group; the first evaporator group and the second evaporator group absorb heat through refrigerant evaporation to cool the air flowing through them.

[0030] The high-efficiency air-liquid fusion air conditioner described in this embodiment includes a first one-way valve 42 and a second one-way valve 43 in the first refrigeration system; one end of the first one-way valve 42 is connected to one end of the first condenser 31; the other end of the first one-way valve 42 is connected to the other end of the first heat exchange channel 11 and the other end of the first evaporator group respectively; the second one-way valve 43 is connected in parallel with the first refrigerant pump 32. The second refrigeration system also includes a third one-way valve 72 and a fourth one-way valve 73; one end of the third one-way valve 72 is connected to one end of the second condenser 61; the other end of the third one-way valve 72 is connected to the other end of the second heat exchange channel 12 and the other end of the second evaporator group respectively; the fourth one-way valve 73 is connected in parallel with the second refrigerant pump 62.

[0031] Specifically, the first check valve 42 prevents refrigerant from flowing back into the first compressor unit, and the second check valve 43 prevents refrigerant from flowing back into the first refrigerant pump 32. The above configuration enables the first refrigeration system to drive the first compressor unit and the first refrigerant pump 32 to work independently. In the second refrigeration system, the second compressor unit, the third check valve 72, and the fourth check valve 73 similarly achieve the above functions.

[0032] The high-efficiency air-liquid fusion air conditioner described in this embodiment includes a first exhaust fan 34 located at the first condenser 31 in the first refrigeration system, and a second exhaust fan 64 located at the second condenser 61 in the second refrigeration system. The first exhaust fan 34, located at the first condenser 31, accelerates the airflow around the first condenser 31, quickly removing the heat released by the refrigerant in the first condenser 31 and increasing the refrigerant condensation speed. The second exhaust fan 64, located at the second condenser 61, accelerates the airflow around the second condenser 61, quickly removing the heat released by the refrigerant in the second condenser 61 and increasing the refrigerant condensation speed.

[0033] In this embodiment, a high-efficiency air-liquid fusion air conditioner is provided with a first liquid storage tank 35 between the other end of the first condenser 31 and the suction port of the first refrigerant pump 32; and a second liquid storage tank 65 between the other end of the second condenser 61 and the suction port of the second refrigerant pump 62. This arrangement balances the refrigerant capacity within the first and second refrigeration systems.

[0034] This embodiment describes a high-efficiency air-liquid fusion air conditioner, in which the outlet of the first refrigerant pump 32 is equipped with a first dryer filter 36; and the outlet of the second refrigerant pump 62 is equipped with a second dryer filter 66. This configuration allows for the filtering of impurities in the refrigerant within both the first and second refrigeration systems.

[0035] The high-efficiency air-liquid fusion air conditioner described in this embodiment includes a first gas-liquid separator 44 in the first refrigeration system. One end of the first gas-liquid separator 44 is connected to the suction port of the first compressor unit. The other end of the first evaporator unit, the other end of the first heat exchange channel 11, and the other end of the first one-way valve 42 are respectively connected to the other end of the first gas-liquid separator 44. The above arrangement can completely prevent liquid refrigerant from entering the first compressor unit and causing liquid slugging damage.

[0036] The second refrigeration system also includes a second gas-liquid separator 74; one end of the second gas-liquid separator 74 is connected to the suction port of the second compressor unit; the other end of the second evaporator unit, the other end of the second heat exchange channel 12 and the other end of the third one-way valve 72 are respectively connected to the other end of the second gas-liquid separator 74; the above arrangement can completely prevent liquid refrigerant from entering the second compressor unit and causing liquid slugging damage.

[0037] This embodiment describes a high-efficiency air-liquid fusion air conditioner. The first evaporator group includes a first left evaporator 521 and a first right evaporator 522; the third expansion valve group includes a third left expansion valve 511 and a third right expansion valve 512; the first left evaporator 521 is connected to the third left expansion valve 511; the first right evaporator 522 is connected to the third right expansion valve 512; the branch containing the first left evaporator 521 and the third left expansion valve 511 and the branch containing the first right evaporator 522 and the third right expansion valve 512 are connected in parallel. The second evaporator group includes a second left evaporator 821 and a second right evaporator 822; the fourth expansion valve group includes a fourth left expansion valve 811 and a fourth right expansion valve 812; the second left evaporator 821 is connected to the fourth left expansion valve 811; the second right evaporator 822 is connected to the fourth right expansion valve 812; the branch containing the second left evaporator 821 and the fourth left expansion valve 811 and the branch containing the second right evaporator 822 and the fourth right expansion valve 812 are connected in parallel.

[0038] Specifically, the first evaporator group adopts a parallel layout of the first left evaporator 521 and the first right evaporator 522, and is connected to the third left expansion valve 511 and the third right expansion valve 512 respectively, forming two independent and parallel refrigerant flow branches; similarly, the second evaporator group is matched with the fourth left expansion valve 811 and the fourth right expansion valve 812 respectively through the second left evaporator 821 and the second right evaporator 822 to form parallel branches.

[0039] This embodiment expands the heat exchange area with air through the above-mentioned settings, making the refrigerant evaporate more fully and the cold air output more uniform, avoiding the problem of local temperature being too high or too low; in addition, each evaporator can be flexibly started and stopped according to the actual cooling load, avoiding energy waste and improving the operational adaptability under different operating conditions.

[0040] The high-efficiency air-hydraulic fusion air conditioner described in this embodiment includes a first left compressor 411, a fifth left check valve 412, a first right compressor 413, and a fifth right check valve 414. The first left compressor 411 is connected to the fifth left check valve 412. The first right compressor 413 is connected to the fifth right check valve 414. The branch containing the first left compressor 411 and the fifth left check valve 412 and the branch containing the first right compressor 413 and the fifth right check valve 414 are connected in parallel. The second compressor unit includes a second left compressor 711, a sixth left check valve 712, a second right compressor 713, and a sixth right check valve 714; the second left compressor 711 is connected to the sixth left check valve 712; the second right compressor 713 is connected to the sixth right check valve 714; the branch containing the second left compressor 711 and the sixth left check valve 712 and the branch containing the second right compressor 713 and the sixth right check valve 714 are connected in parallel.

[0041] Specifically, the first compressor unit is composed of a first left compressor 411 and a first right compressor 413 connected in parallel, and the first left compressor 411 and the first right compressor 413 are connected in series with the fifth left check valve 412 and the fifth right check valve 414 respectively to form an independent parallel branch; similarly, the second compressor unit is constructed in parallel by matching the second left compressor 711 and the second right compressor 713 with the sixth left check valve 712 and the sixth right check valve 714 respectively.

[0042] Through the above settings, this embodiment can start and stop each compressor according to the cooling demand. The cooling demand can be adapted by increasing or decreasing the number of compressors in operation, avoiding energy waste and ensuring that the system maintains high energy efficiency across the entire load range. In addition, it can meet the switching needs of mechanical refrigeration, partial economy, and full economy modes. Multiple compressors can quickly respond to load changes and achieve stable adjustment of cooling output, avoiding temperature fluctuations during mode switching.

[0043] In this embodiment, a high-efficiency air-liquid fusion air conditioner is provided with a first water temperature sensor at the return water inlet 21; a second water temperature sensor is provided between the third heat exchange channel 13 and the fourth heat exchange channel 14; and a third water temperature sensor is provided at the water supply inlet 22. A first air temperature sensor is provided at the return air inlet 91; a second air temperature sensor is provided between the first evaporator group and the second evaporator group; and a third air temperature sensor is provided at the air outlet 92.

[0044] This embodiment monitors the water and air temperatures at different nodes, enabling the high-efficiency air-liquid fusion air conditioner to accurately determine the heat exchange effect and switch between different operating modes.

[0045] Finally, 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 the scope of protection of the present invention. 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 essence and scope of the technical solutions of the present invention.

Claims

1. A high-efficiency air-liquid fusion air conditioner, characterized in that: It includes a first refrigeration system, a second refrigeration system, a liquid-cooled heat exchanger (1), a return water inlet (21), and a supply water inlet (22); the liquid-cooled heat exchanger (1) includes a first heat exchange channel (11), a second heat exchange channel (12), a third heat exchange channel (13) for exchanging heat with the first heat exchange channel (11), and a fourth heat exchange channel (14) for exchanging heat with the second heat exchange channel (12); The return water inlet (21) is connected to one end of the third heat exchange channel (13); the other end of the third heat exchange channel (13) is connected to one end of the fourth heat exchange channel (14); the other end of the fourth heat exchange channel (14) is connected to the water supply inlet (22); The first refrigeration system is connected to the first heat exchange channel (11); the second refrigeration system is connected to the second heat exchange channel (12); The first refrigeration system includes a first evaporator group, a first compressor group, and a first refrigerant pump (32); the second refrigeration system includes a second evaporator group, a second compressor group, and a second refrigerant pump (62); the high-efficiency air-liquid fusion air conditioner also includes an airflow channel (9); the airflow channel (9) is provided with a return air inlet (91) and an air supply outlet (92); a blower (93) is provided at the air supply outlet (92); the first evaporator group and the second evaporator group are both located in the airflow channel (9); the first evaporator group is located near the return air inlet (91); the second evaporator group is located near the air supply outlet (92); The high-efficiency air-liquid fusion air conditioner includes mechanical refrigeration mode, partial economic mode and full economic mode. In mechanical refrigeration mode, the first compressor unit and the second compressor unit are started, and the first refrigerant pump (32) and the second refrigerant pump (62) are turned off; In some economic modes, the first refrigerant pump (32) and the second compressor unit are started, and the first compressor unit and the second refrigerant pump (62) are shut down; In full economy mode, the first refrigerant pump (32) and the second refrigerant pump (62) start, and the first compressor unit and the second compressor unit shut down.

2. The high-efficiency air-liquid fusion air conditioner according to claim 1, characterized in that: The first refrigeration system further includes a first condenser (31), a first expansion valve (33), and a third expansion valve assembly; the outlet of the first refrigerant pump (32) is connected to one end of the first expansion valve (33); the other end of the first expansion valve (33) is connected to one end of the first heat exchange channel (11); the other end of the first heat exchange channel (11) is connected to one end of the first condenser (31); the other end of the first condenser (31) is connected to the inlet of the first refrigerant pump (32); the outlet of the first compressor assembly is connected to one end of the first condenser (31); the inlet of the first compressor assembly is connected to the other end of the first heat exchange channel (11); one end of the third expansion valve assembly is connected to the outlet of the first refrigerant pump (32); the other end of the third expansion valve assembly is connected to one end of the first evaporator assembly; the other end of the first evaporator assembly is connected to the inlet of the first compressor assembly. The second refrigeration system further includes a second condenser (61), a second expansion valve (63), and a fourth expansion valve assembly; the outlet of the second refrigerant pump (62) is connected to one end of the second expansion valve (63); the other end of the second expansion valve (63) is connected to one end of the second heat exchange channel (12); the other end of the second heat exchange channel (12) is connected to one end of the second condenser (61); the other end of the second condenser (61) is connected to the inlet of the second refrigerant pump (62); the outlet of the second compressor assembly is connected to one end of the second condenser (61); the inlet of the second compressor assembly is connected to the other end of the second heat exchange channel (12); one end of the fourth expansion valve assembly is connected to the outlet of the second refrigerant pump (62); the other end of the fourth expansion valve assembly is connected to one end of the second evaporator assembly; the other end of the second evaporator assembly is connected to the inlet of the second compressor assembly.

3. A high-efficiency air-liquid fusion air conditioner according to claim 2, characterized in that: The first refrigeration system further includes a first one-way valve (42) and a second one-way valve (43); one end of the first one-way valve (42) is connected to one end of the first condenser (31); the other end of the first one-way valve (42) is connected to the other end of the first heat exchange channel (11) and the other end of the first evaporator group respectively; the second one-way valve (43) is connected in parallel with the first refrigerant pump (32); The second refrigeration system also includes a third one-way valve (72) and a fourth one-way valve (73); one end of the third one-way valve (72) is connected to one end of the second condenser (61); the other end of the third one-way valve (72) is connected to the other end of the second heat exchange channel (12) and the other end of the second evaporator group respectively; the fourth one-way valve (73) is connected in parallel with the second refrigerant pump (62).

4. A high-efficiency air-liquid fusion air conditioner according to claim 2, characterized in that: The first refrigeration system further includes a first exhaust fan (34) located at the first condenser (31); the second refrigeration system further includes a second exhaust fan (64) located at the second condenser (61).

5. A high-efficiency air-liquid fusion air conditioner according to claim 2, characterized in that: A first liquid storage tank (35) is provided between the other end of the first condenser (31) and the suction port of the first refrigerant pump (32); a second liquid storage tank (65) is provided between the other end of the second condenser (61) and the suction port of the second refrigerant pump (62).

6. A high-efficiency air-liquid fusion air conditioner according to claim 1, characterized in that: The outlet of the first refrigerant pump (32) is provided with a first dryer filter (36); the outlet of the second refrigerant pump (62) is provided with a second dryer filter (66).

7. A high-efficiency air-liquid fusion air conditioner according to claim 3, characterized in that: The first refrigeration system further includes a first gas-liquid separator (44); one end of the first gas-liquid separator (44) is connected to the suction port of the first compressor unit; the other end of the first evaporator unit, the other end of the first heat exchange channel (11) and the other end of the first one-way valve (42) are respectively connected to the other end of the first gas-liquid separator (44). The second refrigeration system further includes a second gas-liquid separator (74); one end of the second gas-liquid separator (74) is connected to the suction port of the second compressor unit; the other end of the second evaporator unit, the other end of the second heat exchange channel (12) and the other end of the third one-way valve (72) are respectively connected to the other end of the second gas-liquid separator (74).

8. A high-efficiency air-liquid fusion air conditioner according to claim 2, characterized in that: The first evaporator group includes a first left evaporator (521) and a first right evaporator (522); the third expansion valve group includes a third left expansion valve (511) and a third right expansion valve (512); the first left evaporator (521) and the third left expansion valve (511) are connected; the first right evaporator (522) and the third right expansion valve (512) are connected; the branch containing the first left evaporator (521) and the third left expansion valve (511) and the branch containing the first right evaporator (522) and the third right expansion valve (512) are connected in parallel; The second evaporator group includes a second left evaporator (821) and a second right evaporator (822); the fourth expansion valve group includes a fourth left expansion valve (811) and a fourth right expansion valve (812); the second left evaporator (821) is connected to the fourth left expansion valve (811); the second right evaporator (822) is connected to the fourth right expansion valve (812); the branch containing the second left evaporator (821) and the fourth left expansion valve (811) and the branch containing the second right evaporator (822) and the fourth right expansion valve (812) are connected in parallel.

9. A high-efficiency air-liquid fusion air conditioner according to claim 2, characterized in that: The first compressor unit includes a first left compressor (411), a fifth left check valve (412), a first right compressor (413), and a fifth right check valve (414); the first left compressor (411) is connected to the fifth left check valve (412); the first right compressor (413) is connected to the fifth right check valve (414); the branch containing the first left compressor (411) and the fifth left check valve (412) and the branch containing the first right compressor (413) and the fifth right check valve (414) are connected in parallel; The second compressor unit includes a second left compressor (711), a sixth left check valve (712), a second right compressor (713), and a sixth right check valve (714); the second left compressor (711) is connected to the sixth left check valve (712); the second right compressor (713) is connected to the sixth right check valve (714); the branch containing the second left compressor (711) and the sixth left check valve (712) and the branch containing the second right compressor (713) and the sixth right check valve (714) are connected in parallel.

10. A high-efficiency air-liquid fusion air conditioner according to claim 1, characterized in that: A first water temperature sensor is provided at the return water inlet (21); a second water temperature sensor is provided between the third heat exchange channel (13) and the fourth heat exchange channel (14); a third water temperature sensor is provided at the water supply inlet (22); a first air temperature sensor is provided at the return air inlet (91); a second air temperature sensor is provided between the first evaporator group and the second evaporator group; and a third air temperature sensor is provided at the air supply outlet (92).

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