Heat pipe air conditioner

Abstract

The utility model discloses a heat pipe air conditioner, which belongs to the technical field of air conditioning equipment, including an indoor terminal air conditioner and an outdoor unit, wherein a plate heat exchanger and a heat pipe condenser are arranged on the outside of the outdoor unit, and the installation position of the plate heat exchanger and the heat pipe condenser is higher than the indoor terminal air conditioner; the indoor terminal air conditioner is equipped with a heat pipe evaporator, and both ends of the heat pipe evaporator are respectively connected to both ends of the plate heat exchanger and the heat pipe condenser to form two sets of circulation loops; the outdoor unit is equipped with a compressor, a compression refrigeration condenser and an expansion valve that form a circulation loop with the plate heat exchanger. The utility model adopts the above-mentioned heat pipe air conditioner, solves the application of heat pipes in scenarios without height difference, has higher system reliability, is more energy-saving, and greatly reduces the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning equipment, in particular to a heat pipe air-conditioning. Background Art

[0002] As the construction volume of domestic data centers gradually increases, the energy consumption of data centers has also increased rapidly. In 2020, the power consumption of data centers accounted for 2.7% of the total electricity consumption of the whole society. In the energy consumption structure of data centers, in addition to the power consumption of servers, the second largest energy consumption is the air conditioning and refrigeration system. Therefore, to reduce PUE, it is necessary to start with the refrigeration system. In order to achieve a PUE below 1.3, the energy efficiency of traditional air conditioners can no longer meet the requirements, and energy-saving solutions such as outdoor natural cooling sources are needed to achieve it.

[0003] Data centers have heat loads all year round. In autumn and winter, when the outdoor temperature is lower than the indoor temperature, traditional air conditioners still need to use compressors for cooling and cooling. When the outdoor temperature is lower than the indoor temperature, multi-split dual-power natural cooling air conditioners can start heat pipe circulation cooling, reduce the compressor start-up time, indirectly utilize outdoor natural cold sources, and greatly reduce air conditioning energy consumption and service life.

[0004] Gravity heat pipe air conditioners are widely used in data centers and can make good use of natural cooling sources, but gravity heat pipes need to meet the conditions that the outdoor unit is higher than the indoor unit and the pipe length cannot be too long.

[0005] When the outdoor main unit cannot be higher than the indoor terminal, such as when the load-bearing capacity or space of the top floor of the machine room is not sufficient, the gravity heat pipe cannot be used, and the system needs to add a fluorine pump to solve the problem. However, after adding the fluorine pump, the complexity of the system is greatly increased, and the reliability of the pump also directly affects the reliability of the system. At the same time, the refrigerant at the terminal cannot be distributed as needed, which puts higher requirements on the control system, and reduces the system reliability and energy efficiency. Summary of the invention

[0006] The utility model aims to provide a heat pipe air conditioner, which can solve the application of heat pipes in scenarios with no height difference, make the system more reliable, more energy-efficient, and greatly reduce the construction cost.

[0007] To achieve the above-mentioned purpose, the utility model provides a heat pipe air conditioner, including an indoor terminal air conditioner and an outdoor unit, wherein a plate heat exchanger and a heat pipe condenser are arranged on the outside of the outdoor unit, and the installation positions of the plate heat exchanger and the heat pipe condenser are higher than the indoor terminal air conditioner; the indoor terminal air conditioner is equipped with a heat pipe evaporator, and both ends of the heat pipe evaporator are respectively connected to the two ends of the plate heat exchanger and the heat pipe condenser to form two sets of circulation loops; the outdoor unit is equipped with a compressor, a compression refrigeration condenser and an expansion valve that form a circulation loop with the plate heat exchanger.

[0008] Preferably, both the heat pipe condenser and the compression refrigeration condenser are equipped with condensing fans.

[0009] Preferably, a first solenoid valve is installed between the output end of the heat pipe evaporator and the plate heat exchanger, and a second solenoid valve is installed between the output end of the heat pipe evaporator and the heat pipe condenser.

[0010] Preferably, a liquid storage device connected between the heat pipe condenser and the input end of the heat pipe evaporator is installed in the outdoor unit.

[0011] Preferably, the number of the indoor terminal air conditioners is several.

[0012] Preferably, the indoor terminal air conditioner includes but is not limited to room-level precision air conditioner, row-level precision air conditioner, rack air conditioner and backboard air conditioner.

[0013] Therefore, the utility model adopts the above-mentioned heat pipe air conditioner to solve the application of heat pipes in scenarios without height differences. The system has higher reliability, is more energy-efficient, and greatly reduces the construction cost.

[0014] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of a heat pipe air conditioner of the utility model.

[0016] Reference numerals

[0017] 1. Indoor terminal air conditioner; 2. Outdoor unit; 3. Plate heat exchanger; 4. Heat pipe condenser; 5. Condensing fan; 6. Heat pipe evaporator; 7. Compressor; 8. Compression refrigeration condenser; 9. Expansion valve; 10. Liquid storage tank; 11. First solenoid valve; 12. Second solenoid valve. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Example

[0021] like Figure 1 As shown, the utility model provides a heat pipe air conditioner, including an indoor terminal air conditioner 1 and an outdoor unit 2. One outdoor unit 2 can be connected to multiple indoor terminal air conditioners 1 at the same time. The indoor terminal air conditioner 1 can include various forms, including but not limited to room-level precision air conditioners, row-level precision air conditioners, rack air conditioners, backboard air conditioners, etc.

[0022] A plate heat exchanger 3 and a heat pipe condenser 4 are provided on the outside of the outdoor unit 2. The installation position of the plate heat exchanger 3 and the heat pipe condenser 4 is higher than the indoor terminal air conditioner 1, which can ensure the smooth operation of the heat pipe circulation. Since the plate heat exchanger 3 and the heat pipe condenser 4 are on the outside of the outdoor unit 2, it is not necessary to install the outdoor unit 2 at a position higher than the indoor terminal air conditioner 1, which can greatly reduce the requirements for the installation environment.

[0023] The indoor terminal air conditioner 1 has a heat pipe evaporator 6 built in, and both ends of the heat pipe evaporator 6 are respectively connected to the plate heat exchanger 3 and the heat pipe condenser 4 to form two circulation loops, namely a heat pipe circulation loop and a natural cooling circulation loop.

[0024] Among them, the cold medium outlet of the plate heat exchanger 3 is connected to the input end of the heat pipe evaporator 6 through a pipeline, and the output end of the heat pipe evaporator 6 is connected to the hot medium inlet of the plate heat exchanger 3 through a pipeline, forming a heat pipe circulation loop. The principle of the heat pipe circulation is: the refrigerant in the heat pipe evaporator 6 absorbs the heat of the air, evaporates and rises to the plate heat exchanger 3, and the gaseous refrigerant is condensed into liquid refrigerant after heat exchange, and returns to the heat pipe evaporator 6 by gravity, and the cycle is repeated. A first solenoid valve 11 is also installed between the output end of the heat pipe evaporator 6 and the plate heat exchanger 3. The refrigerant flow rate of the heat pipe circulation loop can be adjusted by controlling the opening of the first solenoid valve 11 to achieve control of the refrigeration mode.

[0025] The heat pipe circulation loop also needs to be used in conjunction with the compressor refrigerant circulation loop for heat exchange. The compressor refrigerant circulation loop is a circulation loop composed of the compressor 7, compression refrigeration condenser 8 and expansion valve 9 built into the outdoor unit 2 and the plate heat exchanger 3. Specifically, the hot medium outlet of the plate heat exchanger 3 is connected to the compressor 7, compression refrigeration condenser 8 and expansion valve 9 in sequence through a pipeline and finally connected to the cold medium input end of the plate heat exchanger 3, forming a compressor refrigerant circulation loop. Among them, a condensing fan 5 is installed on one side of the compression refrigeration condenser 8 to facilitate the rapid dissipation of heat, which is beneficial to improve the condensation efficiency of the compression refrigeration condenser 8.

[0026] The principle of the compressor refrigerant cycle is: the high-temperature and high-pressure refrigerant gas discharged from the compressor 7 is discharged into the compression refrigeration condenser 8 through the pipeline, and becomes a medium-high temperature refrigerant liquid after condensation, and becomes a low-temperature and low-pressure refrigerant gas-liquid mixture after throttling by the expansion valve 9, and enters the plate heat exchanger 3 to exchange fluorine with the refrigerant of the indoor terminal air conditioner 1. The refrigerant absorbs heat and evaporates to become a gaseous refrigerant that enters the compressor 7, and the cycle continues.

[0027] The heat absorbed by the refrigerant in the heat pipe evaporator 6 in the indoor terminal air conditioner 1 can be discharged outdoors through the cooperation of the heat pipe cycle and the compressor refrigerant cycle.

[0028] The output end of the heat pipe condenser 4 is connected to the input end of the heat pipe evaporator 6 through a pipeline, and the output end of the heat pipe evaporator 6 is connected to the input end of the heat pipe condenser 4 through a pipeline to form a natural cooling cycle. The principle of the natural cooling cycle is: when the outdoor temperature is low, the refrigerant in the heat pipe evaporator 6 absorbs the heat of the air, evaporates and rises to the heat pipe condenser 4, and the gaseous refrigerant is condensed into liquid refrigerant through heat exchange, and returns to the heat pipe evaporator 6 by gravity, and the cycle continues. A condensing fan 5 is also installed on one side of the heat pipe condenser 4 to facilitate the rapid dissipation of heat, which is beneficial to improving the condensation efficiency of the heat pipe condenser 4.

[0029] A second solenoid valve 12 is also installed between the output end of the heat pipe evaporator 6 and the heat pipe condenser 4. The refrigerant flow rate of the natural cooling cycle can be adjusted by controlling the opening of the second solenoid valve 12 to adjust the appropriate cooling mode.

[0030] The outdoor unit 2 is also equipped with a liquid storage tank 10 connected between the heat pipe condenser 4 and the input end of the heat pipe evaporator 6 for temporarily storing the condensed refrigerant to ensure that a sufficient amount of refrigerant can participate in the refrigeration cycle and ensure the smooth progress of the natural cooling cycle.

[0031] The natural cooling cycle will only start when there is a temperature difference between indoors and outdoors, and the outdoor temperature needs to be lower than the indoor temperature. The greater the temperature difference, the better the heat exchange effect. When the temperature difference reaches a certain value, the natural cooling cycle refrigeration can completely replace compressor refrigeration.

[0032] Therefore, the utility model adopts the above-mentioned heat pipe air conditioner to solve the application of heat pipes in scenarios without height differences. The system has higher reliability, is more energy-efficient, and greatly reduces the construction cost.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A heat pipe air conditioner, characterized in that: It includes an indoor terminal air conditioner and an outdoor unit. A plate heat exchanger and a heat pipe condenser are provided on the outside of the outdoor unit. The installation positions of the plate heat exchanger and the heat pipe condenser are higher than the indoor terminal air conditioner. The indoor terminal air conditioner is equipped with a heat pipe evaporator. Both ends of the heat pipe evaporator are respectively connected to the two ends of the plate heat exchanger and the heat pipe condenser to form two circulation loops. The outdoor unit is equipped with a compressor, a compression refrigeration condenser and an expansion valve that form a circulation loop with the plate heat exchanger.

2. A heat pipe air conditioner according to claim 1, characterized in that: Condensation fans are installed on both the heat pipe condenser and the compression refrigeration condenser.

3. A heat pipe air conditioner according to claim 1, characterized in that: A first solenoid valve is installed between the output end of the heat pipe evaporator and the plate heat exchanger, and a second solenoid valve is installed between the output end of the heat pipe evaporator and the heat pipe condenser.

4. A heat pipe air conditioner according to claim 1, characterized in that: The outdoor unit is provided with a liquid storage device connected between the heat pipe condenser and the input end of the heat pipe evaporator.

5. The heat pipe air conditioner according to claim 1, characterized in that: The number of the indoor terminal air conditioners is several.

6. A heat pipe air conditioner according to claim 1, characterized in that: The indoor terminal air conditioners include but are not limited to room-level precision air conditioners, row-level precision air conditioners, rack air conditioners and backboard air conditioners.

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