Composite refrigeration air conditioner with heat pipe

Abstract

The utility model relates to a combined type refrigeration air conditioner with a heat pipe, which comprises a shell, a heat insulation closing plate, a fresh air machine, a return air machine, a cooling module, a gravity heat pipe, an oil-free direct expansion refrigeration module and a controller, a fresh air opening and an exhaust opening are formed in the upper portion of the shell, an air return opening and an air supply opening are formed in the lower portion of the shell, the fresh air fan is located at the fresh air opening, the air return fan is located at the air return opening, the cooling module is located right behind the fresh air fan, and the gravity heat pipe penetrates through the heat insulation sealing plate. The evaporation end of the gravity heat pipe is located on the air return layer, the condensation end of the gravity heat pipe is located on the fresh air layer and located right behind the cooling module, and the oil-free direct expansion refrigeration module is located right behind the gravity heat pipe. Corresponding modes can be switched according to seasonal temperature changes, and the energy-saving and consumption-reducing effects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of evaporative cooling and heat exchange products and control, specifically to a composite refrigeration air conditioner with a heat pipe. Background Technology

[0002] With the increasing volume of data, data center communication equipment rooms face challenges such as high equipment heat generation, high heat density, and complex airflow. The layout of server racks significantly impacts airflow organization and circulation. Data center air conditioning systems typically need to operate year-round to ensure the communication equipment operates at suitable ambient temperatures, consuming substantial amounts of electricity. Statistics from the telecommunications industry indicate that 90% of telecommunications companies' electricity consumption is generated by communication equipment rooms, and over 40% of the power consumption of equipment within these rooms is due to air conditioning. This not only results in high operating costs but also generates significant carbon emissions. Therefore, a high-efficiency and low-maintenance data center air conditioning system is needed. Utility Model Content

[0003] In order to overcome the shortcomings of existing products and technologies, this utility model provides a composite refrigeration air conditioner with heat pipe and its control method, which can adopt different operating modes according to different ambient temperatures, making full use of natural cooling, heat pipe refrigerant phase change and mechanical refrigeration, and greatly reducing energy consumption.

[0004] The technical solution of this utility model embodiment is as follows:

[0005] A composite refrigeration air conditioner with a heat pipe includes a shell, a heat-insulating sealing plate, a fresh air unit, a return air unit, a cooling module, a gravity heat pipe, an oil-free direct expansion refrigeration module, and a controller. The heat-insulating sealing plate is located in the middle of the shell, dividing the internal space of the shell into a heat-insulated fresh air layer and a return air layer. The fresh air layer is located in the upper part of the shell, and the upper part of the shell has a fresh air inlet and an exhaust air outlet. The return air layer is located in the lower part of the shell, and the lower part of the shell has a return air outlet and a supply air outlet. The fresh air unit is located at the fresh air inlet, and the return air unit is located at the return air outlet. The cooling module is located within the fresh air layer and directly behind the fresh air unit. The gravity heat pipe passes through the heat insulation enclosure. The evaporator end of the gravity heat pipe is located in the return air layer, and the condenser end of the gravity heat pipe is located in the fresh air layer and directly behind the cooling module. The oil-free direct expansion refrigeration module is located directly behind the gravity heat pipe. The evaporator end of the oil-free direct expansion refrigeration module is located in the return air layer, and the condenser end of the oil-free direct expansion refrigeration module is located in the fresh air layer. The fresh air unit, the return air unit, the cooling module, and the oil-free direct expansion refrigeration module are electrically connected to the controller.

[0006] Preferably, the cooling module includes a water distributor, a wet membrane, a water receiving tank, and a circulating pump. The water receiving tank is located on the heat-insulating sealing plate, the wet membrane is located directly above the water receiving tank, the water distributor is located directly above the wet membrane, the inlet of the circulating pump is connected to the water receiving tank through a pipe, the outlet of the circulating pump is connected to the water distributor through a pipe, and the circulating pump is electrically connected to the controller.

[0007] Preferably, the oil-free direct expansion refrigeration module includes a condenser, an air-suspension compressor, an evaporator, and a throttling device. The inlet of the condenser is connected to the outlet of the air-suspension compressor via a copper pipe. The inlet of the air-suspension compressor is connected to the outlet of the evaporator via a copper pipe. The liquid inlet of the evaporator is connected to one end of the throttling device via a copper pipe. The other end of the throttling device is connected to the liquid outlet of the condenser via a copper pipe. The evaporator is located in the return air layer, the condenser is located in the fresh air layer, and the air-suspension compressor is electrically connected to the controller.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] By installing gravity heat pipes, the liquid refrigerant inside absorbs heat in the return air layer, transforms into a gaseous state, and rises to the fresh air layer, releasing heat and transforming back into a liquid state. This achieves heat exchange and cooling of the return air, while utilizing fresh air to reduce the condensation pressure of the gravity heat pipes. By installing cooling modules, the ambient air is cooled during periods of high ambient temperature, improving the cooling and condensation efficiency of the gaseous refrigerant in the gravity heat pipes during seasons with high ambient temperatures. By installing oil-free direct expansion refrigeration modules, the return air temperature is further cooled during periods of high summer temperatures, ensuring that the return air temperature meets the temperature requirements of the computer room. By installing controllers, the air conditioning system can be set to operate in different modes based on the ambient temperature, thereby achieving energy saving and consumption reduction while meeting the temperature requirements of the computer room. Attached Figure Description

[0010] Figure 1 This is a schematic diagram illustrating the principle of a composite refrigeration air conditioner with a heat pipe according to this utility model.

[0011] 10. Housing; 11. Fresh air inlet; 12. Exhaust air outlet; 13. Return air outlet; 14. Supply air outlet; 20. Thermal insulation sealing plate; 30. Fresh air unit; 40. Return air unit; 50. Cooling module; 51. Water distributor; 52. Wet film; 53. Water receiving tank; 54. Circulation pump; 60. Gravity heat pipe; 70. Oil-free direct expansion refrigeration module; 71. Condenser; 72. Air suspension compressor; 73. Evaporator; 74. Throttling device; 80. Fresh air layer; 90. Return air layer. Detailed Implementation

[0012] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0013] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0015] like Figure 1 As shown, Figure 1 In this utility model Figure 1 This is a schematic diagram illustrating the principle of a composite refrigeration air conditioner with a heat pipe according to the present invention. The composite refrigeration air conditioner with a heat pipe includes a housing 10, a heat-insulating sealing plate 20, a fresh air unit 30, a return air unit 40, a cooling module 50, a gravity heat pipe 60, an oil-free direct expansion refrigeration module 70, and a controller. The heat-insulating sealing plate 20 is located in the middle of the housing 10, dividing the internal space of the housing 10 into a heat-insulating fresh air layer 80 and a return air layer 90. The fresh air layer 80 is located in the upper part of the housing 10, and the upper part of the housing 10 has a fresh air inlet 11 and an exhaust outlet 12. The return air layer 90 is located in the lower part of the housing 10, and the lower part of the housing 10 has a return air inlet 13 and a supply air outlet 14. The fresh air unit 30 is located at the fresh air inlet. At location 11, the return air fan 40 is located at the return air inlet 13, the cooling module 50 is located inside the fresh air layer 80 and directly behind the fresh air fan 30, the gravity heat pipe 60 passes through the heat insulation sealing plate 20, the evaporation end of the gravity heat pipe 60 is located in the return air layer 90, the condensation end of the gravity heat pipe 60 is located in the fresh air layer 80 and directly behind the cooling module 50, the oil-free direct expansion refrigeration module 70 is located directly behind the gravity heat pipe 60, the evaporation end of the oil-free direct expansion refrigeration module 70 is located in the return air layer 90, and the condensation end of the oil-free direct expansion refrigeration module 70 is located in the fresh air layer 80, and the fresh air fan 30, the return air fan 40, the cooling module 50, and the oil-free direct expansion refrigeration module 70 are electrically connected to the controller.

[0016] This utility model's composite refrigeration air conditioner employs two cooling methods: heat pipe refrigerant phase change heat absorption cooling and mechanical refrigeration refrigerant phase change heat absorption cooling. Heat pipe refrigeration requires no external energy consumption, while mechanical refrigeration does. The composite refrigeration air conditioner releases heat through two methods: one is natural cooling condensation by introducing fresh external air, and the other is cooling the fresh external air before introducing it to the condenser for condensation cooling. These methods are combined by a controller that activates and deactivates corresponding functional modules based on the external ambient temperature, ensuring the air conditioner operates at the appropriate temperature and thus achieving energy-saving and consumption-reducing operation. This utility model discloses a composite refrigeration air conditioner, which consists of upper and lower layers separated by an insulated enclosure. Fresh air enters the upper layer, while hot air from the machine room enters the lower layer. No external energy consumption is required. Heat pipes pass through the insulated enclosure, with the evaporator end in the lower layer and the condenser end in the upper layer. Liquid refrigerant is stored inside the heat pipes, initially at the lower end, where it exchanges heat with the hot air. The liquid refrigerant absorbs heat and vaporizes, rising to the condenser end where it exchanges heat with the fresh air, condensing into liquid and flowing down the pipe wall to the lower end, thus completing the cycle. The hot air return, after absorbing heat through the heat pipes, cools down and is returned to the machine room through the air outlet. Fresh air exchanges heat with the vaporized refrigerant in the heat pipes, warms up, and is discharged to the outside environment through the exhaust vent. The above describes the operating mode during the winter when temperatures are low. In the warmer spring and autumn seasons, the external fresh air temperature is relatively high, so it needs to be cooled. This requires activating the cooling module to cool the fresh air and meet the condensation requirements of the heat pipes. In the hotter summer season, the oil-free direct expansion cooling module needs to be activated to provide secondary cooling. After the hot air return air undergoes heat exchange and cooling with the heat pipes, the temperature is still higher than the required temperature of the computer room. In this case, the oil-free direct expansion cooling module needs to be activated to perform secondary cooling on the hot air return air to meet the temperature requirements of the computer room.

[0017] Regarding how the cooling module achieves cooling, preferably, the cooling module 50 includes a water distributor 51, a wet membrane 52, a water receiving tank 53, and a circulating pump 54. The water receiving tank 53 is located on the heat insulation sealing plate 20, the wet membrane 52 is located directly above the water receiving tank 53, the water distributor 51 is located directly above the wet membrane 52, the inlet of the circulating pump 54 is connected to the water receiving tank 53 through a pipe, the outlet of the circulating pump 54 is connected to the water distributor 51 through a pipe, and the circulating pump 54 is electrically connected to the controller.

[0018] The cooling module increases the contact area between air and circulating water through a wet film, thereby improving heat exchange efficiency. When fresh air passes through the wet film, it undergoes an isenthalpic process with the water sprayed on the wet film, resulting in a decrease in the temperature of the fresh air. The water sprayed on the wet film flows into the water tank and is then drawn into the water distributor by the circulating pump. The water is then circulated and sprayed in the wet film. The cooled fresh air is then sent to the condenser end of the heat pipe to exchange heat and cool the vaporized refrigerant.

[0019] For how the oil-free direct expansion refrigeration module achieves secondary cooling, preferably, the oil-free direct expansion refrigeration module 70 includes a condenser 71, an air-suspension compressor 72, an evaporator 73, and a throttling device 74. The air inlet of the condenser 71 is connected to the air outlet of the air-suspension compressor 72 through a copper pipe. The air inlet of the air-suspension compressor 72 is connected to the air outlet of the evaporator 73 through a copper pipe. The liquid inlet of the evaporator 73 is connected to one end of the throttling device 74 through a copper pipe. The other end of the throttling device 74 is connected to the liquid outlet of the condenser 71 through a copper pipe. The evaporator 73 is located in the return air layer 90, the condenser 71 is located in the fresh air layer 80, and the air-suspension compressor 72 is electrically connected to the controller.

[0020] The oil-free direct expansion system employs an air-suspension compressor, which is the core factor for the stable operation of the system. After heat exchange with the terminal components, the refrigerant undergoes a phase change and enters the cold source system using the system's operating pressure difference as the driving force for circulation. Hot return air first undergoes heat exchange and cooling with the evaporator end of the heat pipe before entering the evaporator. There, it exchanges heat with the throttled refrigerant, absorbing heat and vaporizing. The vaporized refrigerant then enters the air-suspension compressor, which pressurizes and compresses it into a high-pressure, high-temperature refrigerant. This refrigerant then enters the condenser, where it exchanges heat with the cooler fresh air, condensing into a liquid refrigerant. This liquid refrigerant is then throttled and delivered to the evaporator, and the cycle continues.

[0021] The controller controls the operation and switching of various modes of the composite refrigeration air conditioner; it includes the following steps: Step 100: The controller receives the ambient temperature value transmitted in real time by the ambient temperature sensor; Step 200: The controller controls the on / off status of the fresh air unit, return air unit, circulating pump, and air suspension compressor according to the ambient temperature value, so that the system operates in the corresponding mode.

[0022] The step S200 specifically includes:

[0023] When the temperature exceeds 25°C, the controller sends a first mode signal to the circulating pump, air-bearing compressor, fresh air unit, and return air unit. The circulating pump, air-bearing compressor, fresh air unit, and return air unit start simultaneously, and the system operates in summer mode.

[0024] When the temperature is greater than 5℃ and less than or equal to 25℃, the controller sends a second mode signal to the circulation pump, air suspension compressor, fresh air unit, and return air unit. The circulation pump, fresh air unit, and return air unit start simultaneously, the air suspension compressor stops, and the system operates in transition season mode.

[0025] When the temperature is below 5℃, the controller sends a third mode signal to the circulating pump, air suspension compressor, fresh air unit, and return air unit. The fresh air unit and return air unit start simultaneously, while the circulating pump and air suspension compressor shut down, and the system operates in winter mode.

[0026] When the ambient dry-bulb temperature is >25℃: the upper and lower fans are turned on simultaneously, and the water pump of the spray device is turned on, so that the water in the water tank is continuously sprayed onto the packing, thereby cooling the outdoor fresh air. And as long as the indoor and outdoor temperature difference is >5℃, the gravity heat pipe can work continuously without energy consumption. If the supply air temperature does not meet the air supply standard of the machine room, the oil-free direct expansion system is turned on, and the air suspension compressor is turned on to perform supplemental cooling.

[0027] When 5℃ < ambient dry bulb temperature ≤ 25℃: the oil-free direct expansion system does not need to be turned on at this time. The air supply temperature of the computer room can be achieved by relying solely on gravity heat pipes and wet film. The water pump and fan load can be adjusted appropriately, and the frequency can be reduced to achieve energy-saving effect.

[0028] When the ambient dry-bulb temperature is ≤5℃: the air supply temperature of the computer room can be achieved through the fan and gravity heat pipe. At this time, there is no need to turn on the spray device, saving the power consumption of the water pump.

[0029] This composite refrigeration air conditioner with heat pipes effectively reduces the energy consumption of computer room air conditioning by applying a variety of advanced technologies, including an oil-free direct expansion system, gravity heat pipe technology, and evaporative cooling technology. It is also easy to control and operate, and is expected to be widely adopted.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] By installing gravity heat pipes, the liquid refrigerant inside absorbs heat in the return air layer, transforms into a gaseous state, and rises to the fresh air layer, releasing heat and transforming back into a liquid state. This achieves heat exchange and cooling of the return air, while utilizing fresh air to reduce the condensation pressure of the gravity heat pipes. By installing cooling modules, the ambient air is cooled during periods of high ambient temperature, improving the cooling and condensation efficiency of the gaseous refrigerant in the gravity heat pipes during seasons with high ambient temperatures. By installing oil-free direct expansion refrigeration modules, the return air temperature is further cooled during periods of high summer temperatures, ensuring that the return air temperature meets the temperature requirements of the computer room. By installing controllers, the air conditioning system can be set to operate in different modes based on the ambient temperature, thereby achieving energy saving and consumption reduction while meeting the temperature requirements of the computer room.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A composite refrigeration air conditioner with a heat pipe, characterized in that, The system includes a housing, a heat-insulating sealing plate, a fresh air unit, a return air unit, a cooling module, a gravity heat pipe, an oil-free direct expansion refrigeration module, and a controller. The heat-insulating sealing plate is located in the middle of the housing, dividing the internal space of the housing into a heat-insulating fresh air layer and a return air layer. The fresh air layer is located in the upper part of the housing, and the housing has a fresh air inlet and an exhaust outlet in the upper part. The return air layer is located in the lower part of the housing, and the housing has a return air inlet and a supply air outlet in the lower part. The fresh air unit is located at the fresh air inlet, and the return air unit is located at the return air inlet. The cooling module is located... Within the fresh air layer and directly behind the fresh air unit, the gravity heat pipe passes through the heat insulation enclosure. The evaporation end of the gravity heat pipe is located in the return air layer, and the condensation end of the gravity heat pipe is located in the fresh air layer and directly behind the cooling module. The oil-free direct expansion refrigeration module is located directly behind the gravity heat pipe, with its evaporation end in the return air layer and its condensation end in the fresh air layer. The fresh air unit, the return air unit, the cooling module, and the oil-free direct expansion refrigeration module are electrically connected to the controller.

2. The composite refrigeration air conditioner according to claim 1, characterized in that, The cooling module includes a water distributor, a wet membrane, a water receiving tank, and a circulating pump. The water receiving tank is located on the heat-insulating sealing plate, the wet membrane is located directly above the water receiving tank, the water distributor is located directly above the wet membrane, the inlet of the circulating pump is connected to the water receiving tank through a pipe, the outlet of the circulating pump is connected to the water distributor through a pipe, and the circulating pump is electrically connected to the controller.

3. The composite refrigeration air conditioner according to claim 2, characterized in that, The oil-free direct expansion refrigeration module includes a condenser, an air-suspension compressor, an evaporator, and a throttling device. The inlet of the condenser is connected to the outlet of the air-suspension compressor via a copper pipe. The inlet of the air-suspension compressor is connected to the outlet of the evaporator via a copper pipe. The liquid inlet of the evaporator is connected to one end of the throttling device via a copper pipe. The other end of the throttling device is connected to the liquid outlet of the condenser via a copper pipe. The evaporator is located in the return air layer, and the condenser is located in the fresh air layer. The air-suspension compressor is electrically connected to the controller.

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