Multi-connected heat pipe energy-saving air conditioning system suitable for high-density server room

Abstract

The utility model provides a multi-connected heat pipe energy-saving air-conditioning system suitable for a high-density server room, which comprises a plurality of fluorine-fluorine double-coil energy-saving air-conditioning units arranged in the room, and a heat pipe outdoor unit, a water-fluorine intermediate heat exchanger, a cooling tower, a refrigeration host and a water-water heat exchanger which are arranged outside the room, a plurality of fluorine-fluorine double-coil energy-saving air conditioning units are arranged in a machine room, and each fluorine-fluorine double-coil energy-saving air conditioning unit comprises a fluorine coil heat exchanger I and a fluorine coil heat exchanger II. The utility model provides a multi-connected heat pipe energy-saving air conditioning system suitable for a high-density server room. A plurality of fluorine coil heat exchangers I close to a heat source are communicated with a heat pipe outdoor unit to utilize a natural cold source; the fluorine coil heat exchanger II far away from the heat source preferentially utilizes a natural cold source provided by a cooling tower and then utilizes a mechanical cold source provided by a refrigeration host through a water-fluorine intermediate heat exchanger; the system adopts a double-cold-source heat pipe multi-connection mode, and water does not enter a machine room while natural cold sources are fully utilized, so that the system is guaranteed to be energy-saving and reliable in operation all year round.

Description

Technical Field

[0001] The utility model belongs to the field of heat removal in high-density server rooms, and relates to a multi-connected heat pipe energy-saving air-conditioning system, in particular to a multi-connected heat pipe energy-saving air-conditioning system suitable for high-density server rooms. Background Art

[0002] With the rapid development of information technology, the scale and density of data centers and server rooms are increasing, and the integration and computing power of servers are also constantly improving. However, the widespread use of high-density servers also brings huge heat dissipation challenges. Servers generate a large amount of heat when running at high loads. If this heat cannot be dissipated promptly and effectively, it will cause the server to overheat, affecting normal operation and even causing hardware failure. Therefore, how to effectively dissipate heat has become a key issue in data center design and operation.

[0003] Currently, there are a variety of computer room air conditioning systems and heat removal methods on the market, primarily including natural cooling, mechanical cooling, and hybrid cooling methods that combine the two. Natural cooling relies primarily on equipment such as cooling towers, dissipating heat through naturally cool air or water. This method offers significant energy savings, but its cooling effectiveness is significantly reduced during hot weather or when cooling sources are insufficient. Mechanical cooling, on the other hand, utilizes equipment such as chillers and can provide stable cooling in a variety of environmental conditions. However, its high energy consumption hinders energy conservation and emissions reduction.

[0004] In existing technology, air conditioning terminal systems with single-coil heat exchangers are relatively common. These systems utilize natural cooling sources through cooling towers or mechanical cooling through chillers, which can utilize natural cooling to a certain extent. However, during transitional seasons, these systems cannot effectively utilize hybrid cooling modes, leaving some room for energy savings. Furthermore, single-coil heat exchanger systems perform poorly under high loads and extreme environments, making them difficult to meet the efficient and stable heat dissipation requirements of modern computer rooms.

[0005] To improve heat dissipation efficiency and energy savings, water-fluorine double-coil heat exchanger systems have emerged on the market. These systems utilize the cooling tower's natural cooling source to chill water through an intermediate heat exchanger, while simultaneously utilizing a chiller for mechanical cooling. This system effectively utilizes the natural cooling source and achieves significant energy savings. However, depending on the season and load conditions, the synergistic efficiency of the two cooling sources in this system is suboptimal, resulting in suboptimal overall energy efficiency. Furthermore, the water-fluorine double-coil heat exchanger system is complex and has high installation and maintenance costs.

[0006] In summary, while existing computer room air conditioning systems have made some progress in heat dissipation and energy conservation, they still face challenges such as poor energy efficiency, poor adaptability, and complex structures. Developing an energy-saving air conditioning system that can more fully utilize both natural cooling and mechanical refrigeration, and flexibly adjust to environmental and load conditions, to further improve computer room cooling efficiency and significantly reduce energy consumption, remains a pressing technical challenge. Utility Model Content

[0007] In response to the shortcomings and deficiencies of the prior art and to address at least one of the aforementioned and other technical issues in the prior art, the present invention aims to provide a multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms. Multiple fluorine coil heat exchangers I located near the heat source are connected to the heat pipe outdoor unit to utilize natural cooling. Fluorine coil heat exchangers II located farther from the heat source utilize a water-fluorine intermediate heat exchanger, preferentially utilizing the natural cooling provided by the cooling tower and secondarily utilizing the mechanical cooling provided by the refrigeration unit. The system utilizes a dual-cooling-source heat pipe multi-connection system, fully utilizing the natural cooling source while preventing water from entering the room, ensuring year-round energy-saving and reliable operation. The present multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms is particularly suitable for high-density server rooms, providing them with an efficient, energy-saving, and reliable heat dissipation solution.

[0008] The technical solution adopted by the present invention to solve its technical problems is:

[0009] A multi-heat pipe energy-saving air conditioning system suitable for a high-density server room includes multiple fluorine-fluorine double-coil energy-saving air conditioning units arranged in the room, at least one heat pipe outdoor unit arranged outside the room, a water-fluorine intermediate heat exchanger, a cooling tower, a refrigeration host, and a water-to-water heat exchanger. Specifically:

[0010] Each of the fluorine-fluorine double-coil energy-saving air conditioning units includes at least a fluorine coil heat exchanger I and a fluorine coil heat exchanger II, wherein the fluorine coil heat exchanger I is arranged near the heat source, and the fluorine coil heat exchanger II is arranged in the air path downstream of the fluorine coil heat exchanger I; the heat pipe outdoor unit includes at least a heat pipe condenser; the water-fluorine intermediate heat exchanger includes a hot side for circulating refrigerant and a cold side for circulating chilled water; the refrigeration main unit includes a chilled water circulation side and a cooling water circulation side; the water-water heat exchanger includes a hot side for circulating chilled water and a cold side for circulating cooling water;

[0011] Each of the fluorine coil heat exchangers I is connected to the heat pipe condenser in the heat pipe outdoor unit through a pipeline, forming a first refrigerant circulation heat exchange loop using a natural cold source; each of the fluorine coil heat exchangers II is connected to the hot side of the water-fluorine intermediate heat exchanger through a pipeline, forming a second refrigerant circulation heat exchange loop; the cold side of the water-fluorine intermediate heat exchanger, the hot side of the water-water heat exchanger, and the chilled water flow side of the refrigeration host are connected in sequence through pipelines to form a chilled water circulation heat exchange loop that selectively or in combination uses a natural cold source and mechanical refrigeration; the cold side of the water-water heat exchanger, the cooling water flow side of the refrigeration host, and the cooling tower are connected in sequence through pipelines to form a cooling water circulation heat exchange loop;

[0012] And among them,

[0013] A bypass pipe I with a control valve I is provided between the chilled water inlet and the chilled water outlet on the hot side of the water-to-water heat exchanger, and a bypass pipe II with a control valve II is provided between the cooling water inlet and the cooling water outlet on the cold side; a bypass pipe III with a control valve III is provided between the inlet and the outlet on the chilled water flow side of the refrigeration host, and a bypass pipe IV with a control valve IV is provided between the inlet and the outlet on the cooling water flow side.

[0014] Preferably, the bottom of the water-fluorine intermediate heat exchanger is arranged at a higher position than the top of the fluorine coil heat exchanger II, so that the second refrigerant circulation heat exchange circuit formed between the fluorine coil heat exchanger II and the hot side of the water-fluorine intermediate heat exchanger is driven by gravity.

[0015] Preferably, the bottom of the heat pipe outdoor unit is arranged at a position higher than the top of the fluorine coil heat exchanger I, so that the first refrigerant circulation heat exchange circuit formed between the fluorine coil heat exchanger I and the heat pipe condenser in the heat pipe outdoor unit is driven by gravity.

[0016] Preferably, a refrigerant liquid storage tank and a refrigerant pump are optionally installed on the refrigerant pipeline near the refrigerant outlet of the heat pipe condenser, so that the first refrigerant circulation heat exchange loop formed between the fluorine coil heat exchanger I and the heat pipe outdoor unit is driven by power.

[0017] Preferably, a water pump I is installed in the chilled water circulation heat exchange loop, and a water pump II is installed in the cooling water circulation heat exchange loop. By installing water pumps in these two loops, the overall operating efficiency of the system can be improved, ensuring the reliability and stability of the cooling and heat exchange processes.

[0018] Preferably, when the chilled water circulation heat exchange circuit only utilizes a natural cold source, the control valve I and the control valve II are closed, and the control valve III and the control valve IV are opened, so as to correspondingly close the bypass pipe I and the bypass pipe II, and open the bypass pipe III and the bypass pipe IV, so that the cold side of the water-fluorine intermediate heat exchanger bypasses the chilled water flow side of the refrigeration main unit and only forms a chilled water circulation with the hot side of the water-to-water heat exchanger, and the cold side of the water-to-water heat exchanger bypasses the cooling water flow side of the refrigeration main unit and only forms a cooling water circulation with the cooling tower.

[0019] Furthermore, the system adopts a dual-cold source multi-connection method to fully utilize natural cold sources for cooling:

[0020] When the natural cooling source is sufficient and only the heat pipe outdoor unit is started to meet the system operation needs, the first refrigerant circulation heat exchange circuit is started and the cooling tower, refrigeration host and water-to-water heat exchanger are not started and operated;

[0021] When the natural cold source is sufficient and only starting the heat pipe outdoor unit cannot meet the system operation needs, while starting the heat pipe outdoor unit and the cooling tower at the same time using pure natural cold source can meet the system operation needs, the first refrigerant circulation heat exchange loop starts to run; the refrigeration host is closed and the bypass pipe III and bypass pipe IV are opened, and the cooling water circulation formed between the cooling tower and the water-to-water heat exchanger starts to run, providing chilled water cooled by the natural cold source for the chilled water circulation formed between the water-fluorine intermediate heat exchanger and the water-to-water heat exchanger; and at this time, the second refrigerant circulation heat exchange loop starts to run, and heat is exchanged with the chilled water on the cold side of the water-fluorine intermediate heat exchanger, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger II into refrigerant liquid.

[0022] Preferably, when the chilled water circulation heat exchange circuit utilizes natural cold sources and mechanical refrigeration at the same time, the control valves I, II, III and IV are closed to close the bypass lines I, II, III and IV accordingly, so that a chilled water circulation is formed between the cold side of the water-fluorine intermediate heat exchanger, the hot side of the water-water heat exchanger and the chilled water flow side of the refrigeration main unit, and a cooling water circulation is formed between the cold side of the water-water heat exchanger, the cooling water flow side of the refrigeration main unit and the cooling tower.

[0023] Furthermore, when the natural cooling source can be utilized but is insufficient, while the heat pipe outdoor unit and the cooling tower are started to utilize the pure natural cooling source, the refrigeration host is also started to supplement the cooling to meet the system operation needs. At this time:

[0024] The first refrigerant heat exchange circuit starts running; the control valve I, control valve II, control valve III, and control valve IV are closed, and the cooling water cycle composed of the cooling tower, water-to-water heat exchanger, and refrigeration host starts running. At this time, the chilled water in the chilled water cycle is first pre-cooled by a natural cold source, and then the refrigeration host uses mechanical refrigeration to produce chilled water that meets the temperature requirements; and at this time, the second refrigerant circulation heat exchange circuit starts running, and heat is exchanged with the chilled water on the cold side of the water-fluorine intermediate heat exchanger, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger II into a refrigerant liquid.

[0025] Preferably, when the chilled water circulation heat exchange circuit only utilizes mechanical refrigeration, the control valve I and the control valve II are opened, and the control valve III and the control valve IV are closed, so as to correspondingly open the bypass line I and the bypass line II, and close the bypass line III and the bypass line IV, so that the cold side of the water-fluorine intermediate heat exchanger bypasses the hot side of the water-water heat exchanger and only forms a chilled water circulation with the chilled water flow side of the refrigeration main unit, and the cooling water bypasses the cold side of the water-water heat exchanger and only forms a cooling water circulation between the cooling water flow side of the refrigeration main unit and the cooling tower.

[0026] Furthermore, when the natural cooling source does not meet the use conditions, only the refrigeration host is started to perform refrigeration to meet the system operation needs. At this time:

[0027] Open the control valve I and control valve II, close the control valve III and control valve IV, and the cooling water circulation between the cooling tower and the refrigeration host starts to run. The chilled water in the chilled water circulation between the cold side of the water-fluorine intermediate heat exchanger and the refrigeration host is produced by mechanical refrigeration of the refrigeration host to meet the temperature requirements; and at this time, the second refrigerant circulation heat exchange loop starts to run, and heat is exchanged with the chilled water on the cold side of the water-fluorine intermediate heat exchanger, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger II into refrigerant liquid.

[0028] Preferably, the fluorocarbon double-coil energy-saving air-conditioning unit can be a computer room air-conditioning unit installed in the air-conditioning room, or can be a row-level air-conditioning unit installed between cabinets in a row or installed in the upper or lower part of a closed channel, or can be installed on the exhaust side of cabinets in a row in the form of a wind wall.

[0029] Preferably, the fluorofluoro double-coil energy-saving air-conditioning unit is provided with a return air outlet and an air supply outlet. Depending on the place of use, an air filter can be optionally installed at the return air outlet of the fluorofluoro double-coil energy-saving air-conditioning unit to effectively filter dust and particulate matter in the air entering the fluorofluoro double-coil energy-saving air-conditioning unit.

[0030] Furthermore, the system also includes a group control box and various temperature and humidity sensors, pressure sensors, water leakage sensors, etc. The group control box is communicated with the fluorofluoro double-coil energy-saving air conditioner, heat pipe outdoor unit, water-fluorine intermediate heat exchanger, cooling tower, refrigeration host, water-water heat exchanger and various temperature and humidity sensors, pressure sensors, water leakage sensors, etc., so as to regulate the energy-saving and safe operation of the entire system.

[0031] Compared with the existing technology, the multi-heat pipe energy-saving air conditioning system provided by the present invention, which is suitable for high-density server rooms, has the following beneficial and significant technical effects:

[0032] (1) The utility model provides a multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms. Multiple fluorine coil heat exchangers I near the heat source are connected to the heat pipe outdoor unit to utilize natural cooling. Fluorine coil heat exchangers II away from the heat source are connected through a water-fluorine intermediate heat exchanger, preferentially utilizing the natural cooling provided by the cooling tower and secondarily utilizing the mechanical cooling provided by the refrigeration unit. This solution allows for flexible selection of cooling sources in different seasons and environmental conditions, significantly improving the system's energy-saving effects and effectively reducing energy consumption.

[0033] (2) The multi-connected heat pipe energy-saving air conditioning system provided by the present invention, which is suitable for high-density server rooms, adopts a dual-cold source heat pipe multi-connection method. While fully utilizing the natural cooling source, water does not enter the server room, greatly improving the reliability and safety of the system operation. By combining heat pipes with fluorine coil heat exchangers, the cooling medium is ensured to circulate and exchange outside the server room, eliminating the risk of water leakage and improving the safety and stability of the system operation. It is particularly suitable for server room environments with high equipment safety requirements.

[0034] (3) By combining natural cooling sources with mechanical cooling sources, the present invention not only fully utilizes the advantages of natural cooling sources when they are sufficient, but also activates mechanical cooling when they are insufficient, thereby ensuring that the temperature in the computer room is always within an appropriate range. At the same time, the present invention can ensure that the system is energy-efficient and operates reliably throughout the year. It is particularly suitable for high-density server rooms. The system can effectively cope with high-temperature heat dissipation requirements and ensure the stability and efficient operation of server equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural schematic diagram of a multi-heat pipe energy-saving air-conditioning system suitable for high-density server rooms according to the present invention.

[0036] Figure 2 This is a schematic diagram of the operating condition of the multi-heat pipe energy-saving air-conditioning system of the present invention, which is suitable for a high-density server room, when only the heat pipe outdoor unit is started to utilize the natural cooling source.

[0037] Figure 3This is a schematic diagram of the operating conditions of the multi-heat pipe energy-saving air-conditioning system of the present invention, which is suitable for a high-density server room, when the heat pipe outdoor unit and the cooling tower are started simultaneously and only the natural cooling source is used.

[0038] Figure 4 This is a schematic diagram of the operating conditions of the multi-connected heat pipe energy-saving air conditioning system of the present invention, which is suitable for high-density server rooms, when the heat pipe outdoor unit, cooling tower, and refrigeration host are started and natural cooling source and mechanical refrigeration are used simultaneously.

[0039] Figure 5 This is a schematic diagram of the operating conditions of the multi-heat pipe energy-saving air-conditioning system of the present invention, which is suitable for high-density server rooms, when only mechanical refrigeration is used.

[0040] Description of reference numerals:

[0041] Fluoro-fluorine double coil energy-saving air conditioning unit 1, sheet metal frame 1-1, fluorine coil heat exchanger I 1-2, fluorine coil heat exchanger II 1-3, indoor fan 1-4, air filter 1-5, heat pipe outdoor unit unit 2, outdoor unit frame 2-1, heat pipe condenser 2-2, outdoor fan 2-3, controller 2-4, refrigerant storage tank 2-5, refrigerant pump 2-6, water-fluorine intermediate heat exchanger 3, cooling tower 4, refrigeration main unit 5, control valve III 5-1, control valve IV 5-2, water-water heat exchanger 6, control valve I 6-1, control valve II 6-2, water pump I 7, water pump II 8, group control box 9. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and examples. It should be understood that the described examples are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0043] The utility model aims to provide a multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms. The system adopts a dual-cold source heat pipe multi-connection method, which fully utilizes the natural cold source while preventing water from entering the room, ensuring energy-saving and reliable operation of the system throughout the year. It is particularly suitable for high-density server rooms.

[0044] Example 1

[0045] Figure 1This is a schematic diagram of the structure of a multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms. As shown in the figure, the multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms of the present invention includes multiple fluorine-fluorine double-coil energy-saving air conditioning units 1 arranged in the server room, and a heat pipe outdoor unit 2 arranged outside the server room, a water-fluorine intermediate heat exchanger 3, a cooling tower 4, a refrigeration host 5, and a water-water heat exchanger 6, wherein:

[0046] A plurality of fluoro-fluoro double-coil energy-saving air-conditioning units 1 are arranged in a machine room, including a sheet metal frame 1-1 and a fluoro-coil heat exchanger I1-2, a fluoro-coil heat exchanger II1-3, and an indoor fan 1-4 arranged in the sheet metal frame 1-1, wherein the fluoro-coil heat exchanger I1-2 is arranged adjacent to the heat source side and includes at least one refrigerant inlet and one refrigerant outlet, the fluoro-coil heat exchanger II1-3 is arranged downstream of the air path of the fluoro-coil heat exchanger I1-2 and includes at least one refrigerant inlet and one refrigerant outlet, and the indoor fan 1-4 is arranged adjacent to the air outlet side of the fluoro-coil heat exchanger II1-3.

[0047] The heat pipe outdoor unit 2 includes an outdoor unit frame 2-1, a heat pipe condenser 2-2, an outdoor fan 2-3, and a controller 2-4 disposed within the outdoor unit frame 2-1. The heat pipe condenser 2-2 includes at least a refrigerant inlet and a refrigerant outlet. The water-fluorine intermediate heat exchanger 3 includes a hot side and a cold side. The hot side includes a refrigerant inlet and a refrigerant outlet, and the cold side includes a chilled water inlet and a chilled water outlet. The cooling tower 4 includes at least a cooling water inlet and a cooling water outlet. The refrigeration unit 5 includes at least a chilled water inlet, a chilled water outlet, a cooling water inlet, and a cooling water outlet. The water-to-water heat exchanger 6 includes at least a chilled water inlet, a chilled water outlet, a cooling water inlet, and a cooling water outlet.

[0048] A plurality of fluorine coil heat exchangers Ⅰ1-2 and the heat pipe outdoor unit 2 form a first refrigerant circulation heat exchange circuit utilizing a natural cold source through pipelines; a plurality of fluorine coil heat exchangers Ⅱ1-3 and the hot side of the water-fluorine intermediate heat exchanger form a second refrigerant circulation heat exchange circuit that is either a natural cold source or a combination of mechanical refrigeration through pipelines; the cold side of the water-fluorine intermediate heat exchanger 3, the water-to-water heat exchanger 6, and the refrigeration main unit 5 form a chilled water circulation heat exchange circuit that is either a natural cold source or a combination of mechanical refrigeration through pipelines; the cooling tower 4, the water-to-water heat exchanger 6, and the refrigeration main unit 5 form a cooling water circulation heat exchange circuit through pipelines.

[0049] A bypass line I with a control valve I 6-1 is installed between the chilled water inlet and outlet on the hot side of water-to-water heat exchanger 6, and a bypass line II with a control valve II 6-2 is installed between the cooling water inlet and outlet on the cold side. A bypass line III with a control valve III 5-1 is installed between the chilled water inlet and outlet of the refrigeration unit 5, and a bypass line IV with a control valve IV 5-2 is installed between the cooling water inlet and outlet.

[0050] In some preferred embodiments, the bottom of the water-fluorine intermediate heat exchanger 3 is positioned higher than the top of the fluorine coil heat exchanger II 1-3, so that the fluorine coil heat exchanger II 1-3, the hot side of the water-fluorine intermediate heat exchanger 3, and the refrigerant gas-liquid pipe assembly II 8, together with the natural cooling source and mechanical refrigeration, form a second refrigerant circulation heat exchange circuit that is driven by gravity. In addition, the bottom of the heat pipe outdoor unit 2 is positioned higher than the top of the fluorine coil heat exchanger I 1-2, so that the first refrigerant circulation heat exchange circuit using a natural cooling source, formed between the fluorine coil heat exchanger I 1-2 and the heat pipe outdoor unit 2 through the refrigerant gas-liquid pipe assembly I 7, is driven by gravity. At the same time, as a preference, a refrigerant liquid storage tank 2-5 and a refrigerant pump 2-6 are optionally installed on the refrigerant pipeline near the refrigerant outlet of the heat pipe condenser 2-2, so that the first refrigerant heat exchange circuit using a natural cold source formed by the refrigerant gas pipe liquid pipe assembly Ⅰ7 between the fluorine coil heat exchanger Ⅰ1-2 and the heat pipe outdoor unit 2 is driven by power.

[0051] In some preferred embodiments, a water pump I 11 is installed in the chilled water heat exchange circuit, and a water pump II 12 is installed in the cooling water heat exchange circuit. By providing separate water pumps in these two circuits, the overall operating efficiency of the system can be improved, ensuring the reliability and stability of the cooling and heat exchange processes.

[0052] In some preferred embodiments, the fluoro-fluorinated twin-coil energy-saving air conditioning unit 1 can be installed within a computer room air conditioner, or as a row-level air conditioner, between rows of cabinets or above or below an enclosed passageway. Alternatively, it can be installed as a wind wall on the exhaust side of a row of cabinets. Furthermore, the fluoro-fluorinated twin-coil energy-saving air conditioning unit 1 is equipped with a return air vent and a supply air vent. Depending on the location of use, air filters 1-5 can be optionally installed at the return air vent of the fluoro-fluorinated twin-coil energy-saving air conditioning unit 1 to effectively filter dust and particulate matter from the air entering the fluoro-fluorinated twin-coil energy-saving air conditioning unit 1.

[0053] In some preferred embodiments, the system may further include a group control box 13 and various temperature and humidity sensors, pressure sensors, water leakage sensors, etc. The group control box 13 is communicated with the fluorofluoro double-coil energy-saving air conditioner 1, the heat pipe outdoor unit 2, the water-fluorine intermediate heat exchanger 3, the cooling tower 4, the refrigeration main unit 5, the water-water heat exchanger 6 and various temperature and humidity sensors, pressure sensors, water leakage sensors, etc., so as to regulate the energy-saving and safe operation of the entire system.

[0054] Example 2

[0055] When the chilled water circulation heat exchange circuit only uses natural cold sources, close control valve I6-1 and control valve II6-2, open control valve III5-1 and control valve IV5-2, and correspondingly close bypass pipe I and bypass pipe II, and open bypass pipe III and bypass pipe IV, so that the cold side of the water-fluorine intermediate heat exchanger 3 bypasses the chilled water flow side of the refrigeration main unit 5 and only forms a chilled water circulation with the hot side of the water-water heat exchanger 6, and the cold side of the water-water heat exchanger 6 bypasses the cooling water flow side of the refrigeration main unit 5 and only forms a cooling water circulation with the cooling tower 4.

[0056] Figure 2 This is a schematic diagram of the operating conditions of the multi-unit heat pipe energy-saving air conditioning system suitable for high-density server rooms, utilizing natural cooling sources when only the heat pipe outdoor unit is activated. As shown in the figure, when the natural cooling source is sufficient and only the heat pipe outdoor unit 2 is activated to meet system operating needs, the cooling tower 4, refrigeration unit 5, and water-to-water heat exchanger 6 are deactivated. At this point, the first refrigerant heat exchange circuit utilizing natural cooling sources, consisting of the multiple fluorine coil heat exchangers I1-2, the heat pipe outdoor unit 2, and the refrigerant gas and liquid pipe assembly I7, is activated. The refrigerant flow direction within the circuit is indicated by arrow A in the figure.

[0057] Figure 3This is a schematic diagram of the operating conditions of the multi-connected heat pipe energy-saving air conditioning system for high-density server rooms of the present invention when the heat pipe outdoor unit and the cooling tower are started and only the natural cold source is used. As shown in the figure, when the natural cold source is sufficient, starting only the heat pipe outdoor unit cannot meet the system operation needs, and starting the heat pipe outdoor unit 2 and the cooling tower 4 at the same time and using the pure natural cold source can meet the system operation needs, the refrigeration host 5 does not start to run; at this time, the first refrigerant heat exchange circuit using the natural cold source composed of multiple fluorine coil heat exchangers I1-2, heat pipe outdoor unit 2, and refrigerant gas pipe and liquid pipe assembly I7 starts to run (the flow direction of the refrigerant in the circuit is shown by arrow A in the figure); the refrigeration host 5 is turned off and the bypass pipe III5-1 and bypass pipe IV5-2 are opened, the control valve I6-1 and control valve II6-2 are closed, and the cooling water circulation heat exchange circuit composed of the cooling tower 4, water-to-water heat exchanger 6 and the cooling water connecting pipe assembly 10 between the two starts to run ( The direction of cooling water flow in the loop is shown by arrow D in the figure); at this time, chilled water cooled by a natural cold source can be provided for the chilled water circulation heat exchange circuit composed of the cold side of the water-fluorine intermediate heat exchanger 3, the water-water heat exchanger 6 and the chilled water connecting pipe assembly 9 between the two (the direction of chilled water flow in the loop is shown by arrow C in the figure); at this time, a second refrigerant heat exchange circuit using a natural cold source, which is composed of multiple fluorine coil heat exchangers Ⅱ1-3 and the hot side of the water-fluorine intermediate heat exchanger 3 through the refrigerant gas pipe liquid pipe assembly Ⅱ8, is started and operated (the direction of refrigerant flow in the circuit is shown by arrow B in the figure), and can exchange heat with the chilled water on the cold side of the water-fluorine intermediate heat exchanger 3, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger Ⅱ1-3 in the second refrigerant heat exchange circuit into refrigerant liquid.

[0058] Example 3

[0059] Figure 4 This is a schematic diagram of the operating conditions of the multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms, showing the heat pipe outdoor unit, cooling tower, and refrigeration unit operating simultaneously using both natural cooling and mechanical cooling. As shown in the figure, when the chilled water heat exchange circuit utilizes both natural cooling and mechanical cooling, control valves I, II, III, and IV are closed, correspondingly closing bypass lines I, II, III, and IV. This creates a chilled water circulation between the cold side of the water-fluorine intermediate heat exchanger, the hot side of the water-water heat exchanger, and the chilled water flow side of the refrigeration unit. Furthermore, a cooling water circulation is established between the cold side of the water-water heat exchanger, the cooling water flow side of the refrigeration unit, and the cooling tower.

[0060] When the natural cold source can be used but is insufficient, while starting the heat pipe outdoor unit 2 and the cooling tower 4 to utilize the pure natural cold source, the refrigeration host 5 is also started to supplement the refrigeration to meet the system operation needs. At this time, the first refrigerant heat exchange circuit using the natural cold source composed of multiple fluorine coil heat exchangers I1-2, the heat pipe outdoor unit 2, and the refrigerant gas pipe and liquid pipe assembly I7 is started (the flow direction of the refrigerant in the circuit is shown by the arrow A in the figure); the control valve I6-1, the control valve II6-2, the control valve III5-1, and the control valve IV5-2 are closed, and the cooling water circulation heat exchange circuit composed of the cooling tower 4, the water-to-water heat exchanger 6, the refrigeration host 5, and the cooling water connecting pipe assembly 10 is started (the flow direction of the cooling water in the circuit is shown by the arrow F in the figure); at this time, the cold side of the water-fluorine intermediate heat exchanger 3 The chilled water in the chilled water circulation heat exchange circuit which is a combination of natural cold source and mechanical refrigeration, formed by the water-to-water heat exchanger 6, the refrigeration host 5, and the chilled water connecting pipe assembly 9, is first pre-cooled by the natural cold source, and then the chilled water that meets the temperature requirements is produced by mechanical refrigeration using the refrigeration host 5 (the flow direction of the chilled water in the circuit is shown by the arrow E in the figure); at this time, the second refrigerant heat exchange circuit using the natural cold source, which is formed by multiple fluorine coil heat exchangers Ⅱ1-3 and the hot side of the water-fluorine intermediate heat exchanger 3 through the refrigerant gas pipe and liquid pipe assembly Ⅱ8, is started and operated (the flow direction of the refrigerant in the circuit is shown by the arrow B in the figure), and can exchange heat with the chilled water on the cold side of the water-fluorine intermediate heat exchanger 3, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger Ⅱ1-3 in the second refrigerant heat exchange circuit into refrigerant liquid.

[0061] Example 4

[0062] Figure 5 This is a schematic diagram of the operating conditions of the multi-connected heat pipe energy-saving air conditioning system suitable for high-density server rooms according to the present invention, when using only mechanical cooling. As shown in the figure, when the chilled water circulation heat exchange loop utilizes only mechanical cooling, control valves I and II are opened, and control valves III and IV are closed. This correspondingly opens bypass lines I and II, and closes bypass lines III and IV. This allows the cold side of the water-fluorine intermediate heat exchanger to bypass the hot side of the water-water heat exchanger, forming a chilled water circulation only with the chilled water flow side of the refrigeration unit. Furthermore, the cooling water bypasses the cold side of the water-water heat exchanger, forming a cooling water circulation only between the cooling water flow side of the refrigeration unit and the cooling tower.

[0063] When the natural cold source does not meet the use conditions, only the refrigeration host 5 is started for refrigeration to meet the system operation needs. At this time, the cooling water circulation heat exchange loop composed of the cooling tower 4, the refrigeration host 5 and the cooling water connecting pipe assembly 10 between the two is started (the flow direction of the cooling water in the loop is shown by the arrow H in the figure). At this time, the chilled water in the mechanical refrigeration chilled water circulation heat exchange loop composed of the cold side of the water-fluorine intermediate heat exchanger 3, the refrigeration host 5 and the chilled water connecting pipe assembly 9 is only used by the refrigeration host 5 to produce the chilled water that meets the requirements through mechanical refrigeration. Chilled water at the required temperature (the flow direction of chilled water in the loop is shown by arrow G in the figure); at this time, the second refrigerant heat exchange circuit using natural cold source, which is composed of multiple fluorine coil heat exchangers Ⅱ1-3 and the hot side of the water-fluorine intermediate heat exchanger 3 through the refrigerant gas pipe liquid pipe assembly Ⅱ8, starts to operate (the flow direction of refrigerant in the loop is shown by arrow B in the figure), and can exchange heat with the chilled water on the cold side of the water-fluorine intermediate heat exchanger 3, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger Ⅱ1-3 in the second refrigerant heat exchange circuit into refrigerant liquid.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-connected heat pipe energy-saving air conditioning system suitable for a high-density server room, comprising a plurality of fluoro-fluoro double-coil energy-saving air conditioning units placed in the room, at least one heat pipe outdoor unit placed outside the room, a water-fluoro intermediate heat exchanger, a cooling tower, a refrigeration main unit, and a water-to-water heat exchanger, characterized by: Each of the fluorine-fluorine double-coil energy-saving air conditioning units includes at least a fluorine coil heat exchanger I and a fluorine coil heat exchanger II, wherein the fluorine coil heat exchanger I is arranged near the heat source, and the fluorine coil heat exchanger II is arranged in the air path downstream of the fluorine coil heat exchanger I; the heat pipe outdoor unit includes at least a heat pipe condenser; the water-fluorine intermediate heat exchanger includes a hot side for circulating refrigerant and a cold side for circulating chilled water; the refrigeration main unit includes a chilled water circulation side and a cooling water circulation side; the water-water heat exchanger includes a hot side for circulating chilled water and a cold side for circulating cooling water; Each of the fluorine coil heat exchangers I is connected to the heat pipe condenser in the heat pipe outdoor unit through a pipeline, forming a first refrigerant circulation heat exchange loop using a natural cold source; each of the fluorine coil heat exchangers II is connected to the hot side of the water-fluorine intermediate heat exchanger through a pipeline, forming a second refrigerant circulation heat exchange loop; the cold side of the water-fluorine intermediate heat exchanger, the hot side of the water-water heat exchanger, and the chilled water flow side of the refrigeration host are connected in sequence through pipelines to form a chilled water circulation heat exchange loop that selectively or in combination uses a natural cold source and mechanical refrigeration; the cold side of the water-water heat exchanger, the cooling water flow side of the refrigeration host, and the cooling tower are connected in sequence through pipelines to form a cooling water circulation heat exchange loop; And among them, A bypass pipe I with a control valve I is provided between the chilled water inlet and the chilled water outlet on the hot side of the water-to-water heat exchanger, and a bypass pipe II with a control valve II is provided between the cooling water inlet and the cooling water outlet on the cold side; a bypass pipe III with a control valve III is provided between the inlet and the outlet on the chilled water flow side of the refrigeration host, and a bypass pipe IV with a control valve IV is provided between the inlet and the outlet on the cooling water flow side.

2. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 1 is characterized in that: The bottom of the water-fluorine intermediate heat exchanger is arranged at a higher position than the top of the fluorine coil heat exchanger II, so that the second refrigerant circulation heat exchange circuit formed between the fluorine coil heat exchanger II and the hot side of the water-fluorine intermediate heat exchanger is driven by gravity.

3. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 1, characterized in that: The bottom of the heat pipe outdoor unit is arranged at a position higher than the top of the fluorine coil heat exchanger I, so that the first refrigerant circulation heat exchange circuit formed between the fluorine coil heat exchanger I and the heat pipe condenser in the heat pipe outdoor unit is driven by gravity.

4. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 1, characterized in that: A refrigerant liquid storage tank and a refrigerant pump are optionally installed on the refrigerant pipeline near the refrigerant outlet of the heat pipe condenser, so that the first refrigerant circulation heat exchange loop formed between the fluorine coil heat exchanger I and the heat pipe outdoor unit is driven by power.

5. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 1, characterized in that: When the chilled water circulation heat exchange circuit only utilizes a natural cold source, the control valves I and II are closed, and the control valves III and IV are opened, so as to correspondingly close the bypass lines I and II, and open the bypass lines III and IV, so that the cold side of the water-fluorine intermediate heat exchanger bypasses the chilled water flow side of the refrigeration main unit and only forms a chilled water circulation with the hot side of the water-to-water heat exchanger, and the cold side of the water-to-water heat exchanger bypasses the cooling water flow side of the refrigeration main unit and only forms a cooling water circulation with the cooling tower.

6. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 5, characterized in that: The system adopts dual cooling source multi-connection mode, making full use of natural cooling source cooling: When the natural cooling source is sufficient and only the heat pipe outdoor unit is started to meet the system operation needs, the first refrigerant circulation heat exchange circuit is started and the cooling tower, refrigeration host and water-to-water heat exchanger are not started and operated; When the natural cold source is sufficient and only starting the heat pipe outdoor unit cannot meet the system operation needs, while starting the heat pipe outdoor unit and the cooling tower at the same time using pure natural cold source can meet the system operation needs, the first refrigerant circulation heat exchange loop starts to run; the refrigeration host is closed and the bypass pipe III and bypass pipe IV are opened, and the cooling water circulation formed between the cooling tower and the water-to-water heat exchanger starts to run, providing chilled water cooled by the natural cold source for the chilled water circulation formed between the water-fluorine intermediate heat exchanger and the water-to-water heat exchanger; and at this time, the second refrigerant circulation heat exchange loop starts to run, and heat is exchanged with the chilled water on the cold side of the water-fluorine intermediate heat exchanger, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger II into refrigerant liquid.

7. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 1, characterized in that: When the chilled water circulation heat exchange circuit utilizes natural cold source and mechanical refrigeration at the same time, the control valve I, control valve II, control valve III and control valve IV are closed to close the bypass pipe I, bypass pipe II, bypass pipe III and bypass pipe IV accordingly, so that a chilled water circulation is formed between the cold side of the water-fluorine intermediate heat exchanger, the hot side of the water-water heat exchanger and the chilled water flow side of the refrigeration host, and a cooling water circulation is formed between the cold side of the water-water heat exchanger, the cooling water flow side of the refrigeration host and the cooling tower.

8. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 7, characterized in that: When the natural cooling source is available but insufficient, while the heat pipe outdoor unit and the cooling tower are started to utilize the pure natural cooling source, the refrigeration host is also started to supplement the cooling to meet the system operation needs. At this time: The first refrigerant circulation heat exchange loop starts running; the control valve I, control valve II, control valve III, and control valve IV are closed, and the cooling water circulation composed of the cooling tower, water-to-water heat exchanger, and refrigeration host starts running. At this time, the chilled water in the chilled water circulation is first pre-cooled by a natural cold source, and then the refrigeration host is used to produce chilled water that meets the temperature requirements through mechanical refrigeration; and at this time, the second refrigerant circulation heat exchange loop starts running, and heat is exchanged with the chilled water on the cold side of the water-fluorine intermediate heat exchanger, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger II into a refrigerant liquid.

9. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 1, characterized in that: When the chilled water circulation heat exchange loop only utilizes mechanical refrigeration, the control valve I and the control valve II are opened, and the control valve III and the control valve IV are closed, so as to correspondingly open the bypass pipe I and the bypass pipe II, and close the bypass pipe III and the bypass pipe IV, so that the cold side of the water-fluorine intermediate heat exchanger bypasses the hot side of the water-water heat exchanger and only forms a chilled water circulation with the chilled water flow side of the refrigeration main unit, and the cooling water bypasses the cold side of the water-water heat exchanger and only forms a cooling water circulation between the cooling water flow side of the refrigeration main unit and the cooling tower.

10. The multi-heat pipe energy-saving air conditioning system suitable for a high-density server room according to claim 9, characterized in that: When the natural cooling source does not meet the use conditions, only the refrigeration host is started to perform refrigeration to meet the system operation needs. At this time: Open the control valve I and control valve II, close the control valve III and control valve IV, and the cooling water circulation between the cooling tower and the refrigeration host starts to run. The chilled water in the chilled water circulation between the cold side of the water-fluorine intermediate heat exchanger and the refrigeration host is produced by mechanical refrigeration of the refrigeration host to meet the temperature requirements; and at this time, the second refrigerant circulation heat exchange loop starts to run, and heat is exchanged with the chilled water on the cold side of the water-fluorine intermediate heat exchanger, thereby condensing the refrigerant vapor that absorbs the heat of the server in the fluorine coil heat exchanger II into refrigerant liquid.

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