Air conditioning system

Abstract

The invention relates to an air conditioning system which comprises a refrigerant circulating device and a cooling liquid circulating device. The refrigerant circulating device comprises a refrigerant circulating flow path formed by a compressor, a condenser, an expansion valve and an evaporator. And the cooling liquid circulating device comprises a cooling liquid circulating flow path formed by the equipment barrel groove, the circulating pump and the heat exchange device. Cooling liquid in the cooling liquid circulation flow path discharges heat in the heat exchange device. The compressor and the condenser are arranged in the equipment tank and immersed in the cooling liquid.

Description

Technical Field

[0001] The present invention relates to an air conditioning system, in particular to an air conditioning system in which components are cooled in an immersion manner and full heat recovery is performed. Background Art

[0002] The air conditioning system is a device that moves heat from indoor spaces to the outdoors, and has a history of hundreds of years. The air conditioning system uses refrigerant as the working fluid, which circulates in the pipes and repeatedly changes its phase between liquid and gas to achieve the effect of continuous heat absorption and heat release.

[0003] However, in traditional air-conditioning systems, the compressor and condenser are generally installed outdoors. The compressor generates heat energy when running at high speed. The refrigerant that absorbs heat through the indoor evaporator will release heat and condense in the outdoor condenser, and the released heat energy will be directly dissipated into the outdoor air. The world is currently facing a warming crisis with rising average temperatures. This heat energy will not only cause the temperature of the environment to rise, but also be a waste of energy, which is not in line with the goal of environmental protection and energy conservation. In addition, the vibration and noise generated by the operation of the compressor and the condenser fan will also reduce the comfort of the living or working environment, and when the equipment is exposed to the outdoor environment, its operating efficiency and life will also be affected by the temperature, humidity or salt content of the environment and reduce it. Summary of the invention

[0004] Therefore, in view of the above problems, the inventors of the present invention have explored and designed an air conditioning system to improve the shortcomings of the conventional technology and enhance its industrial applicability.

[0005] The technical means adopted by the present invention provide an air-conditioning system, including a refrigerant circulation device and a coolant circulation device, wherein: the refrigerant circulation device includes a compressor, a condenser, an expansion valve and an evaporator, the compressor, the condenser, the expansion valve and the evaporator are connected in sequence with pipes to form a refrigerant circulation flow path, and the refrigerant circulation flow path is for a refrigerant to circulate; the coolant circulation device includes an equipment tank, a circulation pump and a heat exchange device, the equipment tank, the circulation pump and the heat exchange device are connected in sequence with pipes to form a coolant circulation flow path, and the coolant circulation flow path is for a coolant to circulate, and the coolant discharges heat in the heat exchange device; wherein the compressor and the condenser are arranged in the equipment tank and immersed in the coolant.

[0006] In one embodiment of the air conditioning system of the present invention, the heat exchange device is a heat exchanger, and the coolant circulation flow path is in thermal contact with a heat recovery water pipeline in the heat exchanger, and the heat recovery water pipeline is configured to receive the heat discharged by the coolant.

[0007] In one embodiment of the air conditioning system of the present invention, the heat exchange device is a plate heat exchanger.

[0008] In one embodiment of the air conditioning system of the present invention, the heat exchange device is a closed cooling water tower.

[0009] In one embodiment of the air conditioning system of the present invention, the heat exchange device includes a heat exchanger and a closed cooling water tower, the coolant circulation flow path has a first branch flow path and a second branch flow path, the first branch flow path and the second branch flow path branch off at the downstream of the circulation pump and merge at the upstream of the equipment tank or the equipment tank group, the first branch flow path flows through the closed cooling water tower, the second branch flow path flows through the heat exchanger, and the second branch flow path is in thermal contact with a heat recovery water pipeline in the heat exchanger, and the heat recovery water pipeline is configured to receive the heat discharged from the coolant in the second branch flow path.

[0010] In one embodiment of the air conditioning system of the present invention, the first branch flow path and the second branch flow path are each provided with an electric switching valve for opening or closing the first branch flow path and the second branch flow path, and adjusting the flow rate of the coolant in the first branch flow path and the second branch flow path.

[0011] In one embodiment of the air conditioning system of the present invention, the condenser is a double-tube spiral condenser, a coil-type bare copper tube condenser or a plate heat exchange condenser.

[0012] In one embodiment of the air conditioning system of the present invention, the equipment tank is provided with a drainage pipeline, and a drainage valve is provided on the drainage pipeline.

[0013] In one embodiment of the air conditioning system of the present invention, the refrigerant circulation device further includes a control board, which is disposed in the equipment tank and immersed in the coolant.

[0014] In an embodiment of the air conditioning system of the present invention, the barrel tank is made of carbon steel, stainless steel, acrylic or galvanized steel plate.

[0015] In one embodiment of the air conditioning system of the present invention, the coolant circulation device further includes a coolant storage tank body, which is connected to the coolant circulation flow path, and the coolant storage tank body is arranged at the highest point in the coolant circulation flow path. The coolant storage tank body is provided with a liquid level sensor.

[0016] The air conditioning system of the present invention utilizes an immersion cooling method to absorb the heat of the compressor and condenser of the refrigerant circulation device, so that the heat will not be directly discharged to the environment, which is more environmentally friendly. By immersing the compressor in the coolant in the barrel tank, the vibration and noise of the compressor are also absorbed by the coolant and converted into heat energy, reducing interference to people and increasing the comfort of the living or working environment. In some embodiments, the heat absorbed by the coolant can be recovered by the heat recovery pipeline in the heat exchanger and used in other occasions where heat is needed, further increasing the utilization rate of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention.

[0018] Description of reference numerals:

[0019] 100 Air conditioning system

[0020] 1 Refrigerant circulation device

[0021] 11. Compressor

[0022] 12 Condenser

[0023] 13. Expansion valve

[0024] 14 Evaporator

[0025] 15 Control board

[0026] CP1 Refrigerant circulation path

[0027] 2 Coolant circulation device

[0028] 21 Equipment Tanks

[0029] 211 Inspection door

[0030] 22 Circulation pump

[0031] 23 Heat exchange device

[0032] 231 Closed cooling water tower

[0033] 232 Heat exchanger

[0034] 24 Coolant tank

[0035] 241 Liquid Level Sensor

[0036] CP2 Coolant Circulation Circuit

[0037] CP21 First branch flow path

[0038] CP22 Second branch flow path

[0039] CT Coolant

[0040] DL Drain Line

[0041] DL1 Drain Valve

[0042] RL Hot water recovery line

[0043] PL Power Wiring

[0044] CL communication wiring

[0045] V Service Valve

[0046] P Electric on / off valve

[0047] P1 Electric two-way valve

[0048] SJ Pressure-resistant Watertight Joint

[0049] F Fan

[0050] TM1 Thermal Flow Meter

[0051] TM2 Temperature Sensor

[0052] FM Flow Meter DETAILED DESCRIPTION

[0053] The detailed description and technical contents of the present invention are described as follows with reference to the accompanying drawings. However, the accompanying drawings are only provided for reference and explanation to help understand the present invention and are not intended to limit the scope of the present invention.

[0054] First, see Figure 1 , which is a schematic diagram of an embodiment of an air conditioning system of the present invention. The air conditioning system 100 includes a refrigerant circulation device 1 and a coolant circulation device 2.

[0055] The refrigerant circulation device 1 includes a compressor 11, a condenser 12, an expansion valve 13 and an evaporator 14. The compressor 11, the condenser 12, the expansion valve 13 and the evaporator 14 are connected in sequence by pipes to form a refrigerant circulation flow path CP1, and the refrigerant circulation flow path CP1 is used for a refrigerant (not shown) to circulate.

[0056] The compressor 11 can compress the refrigerant into a high temperature and high pressure state, and drive the refrigerant to flow in the refrigerant circulation flow path CP1 in the direction of the arrow. The compressor 11 can be operated in a variable frequency mode or a fixed frequency mode. The form of the compressor 11 includes but is not limited to a reciprocating type, a scroll type, a spiral type or a centrifugal type.

[0057] The refrigerant gas compressed by the compressor 11 enters the condenser 12, where it discharges heat and changes into a high-pressure, normal-temperature liquid phase. After the high-pressure, normal-temperature liquid phase refrigerant passes through the expansion valve 13 and is reduced in pressure to a low-pressure, normal-temperature liquid-gas phase refrigerant, it enters the evaporator 14 to absorb heat and change into a low-pressure, low-temperature gas phase, and then enters the compressor 11 again for compression, starting a new cycle. The condenser 12 may be, but is not limited to, a coil-type bare copper tube condenser, a plate heat exchange condenser, or a double-sleeved spiral condenser. A fan F may be provided near the evaporator 14 to circulate indoor air. After the heat in the indoor air is absorbed by the evaporator 14, it is cooled and cooled, so that the ambient temperature of the area near the evaporator 14 is reduced.

[0058] The coolant circulation device 2 includes an equipment tank 21, a circulation pump 22 and a heat exchange device 23. The equipment tank 21, the circulation pump 22 and the heat exchange device 23 are connected in sequence by pipes to form a coolant circulation flow path CP2. The coolant circulation flow path CP2 is for the coolant CT to circulate.

[0059] The compressor 11 and the condenser 12 are arranged in the equipment tank 21 and immersed in the coolant CT. Optionally, the expansion valve 13 can also be arranged in the equipment tank 21 and immersed in the coolant CT. The coolant CT in the equipment tank 21 is used to absorb the heat generated by the compressor 11 during operation and the heat discharged by the condenser 12, and serves as a vibration damper for the compressor 11, absorbing the vibration of the compressor 11 and converting it into heat absorption, while reducing the overall operating noise of the equipment tank 21. The material of the equipment tank 21 can be carbon steel (such as SS400), stainless steel (such as SUS304), acrylic, galvanized steel plate or other suitable materials. The tank 21 can be provided with a drainage pipeline DL. A drainage valve DL1 is provided on the drainage pipeline DL, and the drainage valve DL1 can be a manual type. When the equipment in the equipment tank 21 needs to be repaired, the drainage valve DL1 can be opened to discharge the internal coolant CT and store it in the storage barrel. The equipment tank 21 may be provided with an inspection door 211, so that the engineering personnel can enter the tank 21 to inspect the internal components. The equipment tank 21 may be a closed type or an open type.

[0060] The circulation pump 22 drives the coolant CT to flow in the coolant circulation flow path CP2 in the direction of the arrow. The circulation pump 22 can be arranged in a single unit or in parallel in multiple units, and can operate in a variable frequency mode or a fixed frequency mode. The circulation pump 22 can be vertical or horizontal, centrifugal, axial flow or multi-stage.

[0061] The cooling liquid CT discharges heat in the heat exchange device 23, and the cooled cooling liquid CT flows in again. The heat exchange device 23 may be a closed cooling water tower 231. When the high-temperature cooling liquid CT flows through the closed cooling water tower 231, it can transfer heat to the cooling water in the closed cooling water tower 231 to dissipate heat.

[0062] Preferably, the heat contained in the high-temperature coolant CT can be recovered. The coolant circulation flow path CP2 can be in thermal contact with a heat recovery water pipeline RL in the heat exchange device 23, and the heat recovery water pipeline RL receives the heat discharged by the coolant. The heat exchange device 23 can be a heat exchanger 232, and the heat exchanger 232 can be a plate heat exchanger or a shell and tube heat exchanger. Using the heat recovery water pipeline RL to recover the heat absorbed by the coolant CT can increase the utilization rate of energy. The hot water recovered by the heat recovery water pipeline RL can be sent to a hot water tank or various forms of water heaters for reheating, or sent to other places where heat is needed.

[0063] Optionally, in one embodiment, the heat exchange device 23 may include a closed cooling water tower 231 and a heat exchanger 232 at the same time. The cooling liquid circulation flow path CP2 may have a first branch flow path CP21 and a second branch flow path CP22. The first branch flow path CP21 flows through the cooling water tower 231, and the second branch flow path CP22 flows through the heat exchanger 232. The second branch flow path CP22 is in thermal contact with the heat recovery water pipeline RL in the heat exchanger 232, and the heat recovery water pipeline RL is configured to receive the heat discharged by the cooling liquid in the second branch flow path CP22. The first branch flow path CP21 and the second branch flow path CP22 are branched at the downstream of the circulation pump 22, and after flowing through the cooling water tower 231 and the heat exchanger 232 respectively, they merge at the upstream of the equipment tank 21 to deliver the cooled cooling liquid CT into the equipment tank 21. An electric switch valve P may be provided at the entrance of the first branch flow path CP21 and the second branch flow path CP22 respectively, for opening, closing or proportionally distributing the coolant flow into the first branch flow path CP21 and the second branch flow path CP22. The electric switch valve P may be in the form of a proportional electric valve. The electric switch valve P may adjust the coolant flow in the first branch flow path CP21 and the second branch flow path CP22 according to the required working temperature setting of the equipment tank 21 or according to the heat recovery demand of the heat exchange device 23. A flow meter FM, a heat flow meter TM1 and a temperature sensor TM2 may be provided on the coolant circulation flow path CP2 to monitor the flow and working fluid temperature in the coolant circulation flow path CP2 for the calculation of the heat recovery amount and future carbon rights.

[0064] Furthermore, the coolant circulation device 2 further includes a coolant storage tank 24. The coolant storage tank 24 is set at the highest point in the coolant circulation flow path CP2. The coolant storage tank 24 is connected to the coolant circulation flow path CP2 and has a built-in liquid level sensor 241. The form of the liquid level sensor 241 includes but is not limited to a float type, a connecting rod type, and a pressure sensor type. When a coolant CT leakage event occurs in the system, when the liquid level sensor 241 detects a drop in the liquid level, the electric two-way valve P1 of each equipment tank 21 can be immediately closed and a warning signal can be issued to notify the management personnel at the same time.

[0065] Optionally, a maintenance valve V may be provided in the refrigerant circulation circuit CP1 and the coolant circulation circuit CP2. When the compressor 11 or the circulating pump 22 is shut down, closing the maintenance valve V can prevent the high-pressure refrigerant or coolant from flowing back. The maintenance valve V can also be used to test whether there is leakage in the pipeline. The maintenance valve V can be in the form of a gate valve or an angle valve.

[0066] Furthermore, the refrigerant circulation device 1 may include a control board 15. The control board 15 is electrically connected to the compressor 11, and can control the operation of the compressor 11, or control other device components in the air-conditioning system 100, such as the circulation pump 22 or the electric valve, or receive the sensing signal sent back by the sensing component in the air-conditioning system 100. The control board 15 includes a processor, a memory, a timer, an input interface and an output interface to perform tasks such as storing programs, storing data, executing programs, controlling hardware, receiving signals and communicating. The control board 15 may also integrate functions such as analog-to-digital, digital-to-analog, and voltage regulation. The processor may be a CPU-type processor, or may include a special-purpose processor, such as a digital signal processor (DSP). The memory may be a RAM or a ROM. The control board 15 may be a microcontroller (MCU), a microcomputer, a single-board computer, or other devices with similar functions. The control board 15 may obtain power and transmit signals through the power piping PL and the communication piping CL. The power pipe PL and the communication pipe CL can pass through the barrel 21 through the pressure-resistant watertight joint SJ to connect to the control board 15. In this embodiment, the components and circuit boards of the control board 15 are arranged in the barrel 21 and immersed in the coolant CT.

[0067] Preferably, the coolant CT used in the air-conditioning system 100 has the following characteristics. To ensure safety under normal ambient temperature operation, the closed flash point of the coolant CT is higher than 180°C and the open flash point is higher than 210°C to ensure that it is non-flammable under normal temperature conditions. To ensure safety under high temperature operation, the boiling point of the coolant CT is higher than 230°C to prevent the coolant CT from boiling during system operation. To ensure safety under low temperature operation, the freezing point is lower than -60°C. Preferably, the specific heat capacity of the coolant CT may be greater than 1.8J / g-°C to absorb more heat energy. Preferably, the thermal conductivity of the coolant CT is between 0.55W / mK and 1W / mK to effectively absorb and conduct heat. Preferably, the kinematic viscosity of the coolant CT used is 1.21~5.9mm in the temperature range (20~60°C) during the circulation process. 2 / s (the kinematic viscosity is high when the temperature is low and the kinematic viscosity is low when the temperature is high), so that the flow can be smooth. Preferably, the breakdown voltage of the coolant CT is greater than 60kV, and it has sufficient insulation to ensure the safety of electronic equipment. The coolant CT can be selected from materials with good compatibility, so that when the coolant CT comes into contact with polymer materials, metal materials, surface spray parts, and electronic components, it will not cause the above materials and components to swell, crack, corrode, oxidize, discolor, foam, etc. Preferably, the coolant CT also has the characteristics of being insoluble in water, having an acid value of 0 (mgKOH / g), being non-toxic, odorless, and having a pH value of 7.1. Combining the above characteristics, the coolant CT can effectively protect the compressor 11, condenser 12, expansion valve 13, control board 15 in the equipment tank 21, and all metal pipes and fittings in the coolant circulation flow path CP2 from being affected by the external environment, making it difficult for the system to scale, and improving the efficiency of the system and extending the service life of the overall equipment and materials.

[0068] In summary of the above embodiments, the air conditioning system of the present invention can be applied to collective housing, office buildings, shopping centers, restaurants, dormitories, commercial complexes, and can also be applied to data centers and factories that require a large amount of cooling. The air conditioning system of the present invention can effectively improve energy utilization, and has the advantages of low noise and low vibration. The equipment and materials immersed in the coolant in the system can also have a longer operation and service life. The overall system has obvious energy-saving and carbon-reduction benefits, and can improve the comfort of living or working places.

[0069] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioning system, comprising a refrigerant circulation device and a coolant circulation device, characterized in that: The refrigerant circulation device comprises a compressor, a condenser, an expansion valve and an evaporator, wherein the compressor, the condenser, the expansion valve and the evaporator are connected in sequence by pipe fittings to form a refrigerant circulation flow path, and the refrigerant circulation flow path is used for a refrigerant to circulate; The coolant circulation device comprises an equipment tank, a circulation pump and a heat exchange device, wherein the equipment tank, the circulation pump and the heat exchange device are connected in sequence by pipe fittings to form a coolant circulation flow path, wherein the coolant circulates through the coolant circulation flow path, and the coolant discharges heat in the heat exchange device; The compressor and the condenser are arranged in the equipment tank and immersed in the coolant.

2. The air conditioning system according to claim 1, characterized in that: The heat exchange device is a heat exchanger, in which the coolant circulation flow path is in thermal contact with a heat recovery water pipeline, and the heat recovery water pipeline is configured to receive the heat discharged by the coolant.

3. The air conditioning system according to claim 2, characterized in that: The heat exchange device is a plate heat exchanger.

4. The air conditioning system according to claim 1, characterized in that: The heat exchange device is a closed cooling water tower.

5. The air conditioning system according to claim 1, characterized in that: The heat exchange device includes a heat exchanger and a closed cooling water tower. The coolant circulation flow path has a first branch flow path and a second branch flow path. The first branch flow path and the second branch flow path branch off at the downstream of the circulation pump and merge at the upstream of the barrel tank. The first branch flow path flows through the closed cooling water tower, and the second branch flow path flows through the heat exchanger. The second branch flow path is in thermal contact with a heat recovery water pipeline in the heat exchanger. The heat recovery water pipeline is configured to receive heat discharged from the coolant in the second branch flow path.

6. The air conditioning system according to claim 5, characterized in that: The first branch flow path and the second branch flow path are each provided with an electric switch valve for opening or closing the first branch flow path and the second branch flow path, and adjusting the flow of the cooling liquid in the first branch flow path and the second branch flow path.

7. The air conditioning system according to claim 1 or 2, characterized in that: The condenser is a double-tube spiral condenser, a coil-type bare copper tube condenser or a plate heat exchange condenser.

8. The air conditioning system according to claim 1 or 2, characterized in that: The barrel tank is provided with a drainage pipeline, and the drainage pipeline is provided with a drainage valve.

9. The air conditioning system according to claim 1 or 2, characterized in that: The refrigerant circulation device further comprises a control board, which is arranged in the barrel tank and immersed in the coolant.

10. The air conditioning system according to claim 1 or 2, characterized in that: The tank is made of carbon steel, stainless steel, acrylic or galvanized steel.

11. The air conditioning system according to claim 1 or 2, characterized in that: The coolant circulation device further includes a coolant storage tank body, which is connected to the coolant circulation flow path, and the coolant storage tank body is arranged at the highest point in the coolant circulation flow path. The coolant storage tank body is provided with a liquid level sensor.

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