Water system of multi-connected air-cooled air conditioner

Abstract

The water system comprises a water supply pipeline, at least one wet film assembly and a water pump, the water supply pipeline comprises a first pipeline section, a second pipeline section and at least one third pipeline section, the third pipeline section is connected to the second pipeline section, the first pipeline section is connected to the second pipeline section, and a plurality of water outlet holes are formed in the third pipeline section; the wet film assemblies are at least partially located on the lower portions of the corresponding third pipeline sections and are arranged close to the heat dissipation surfaces of heat exchangers of the corresponding multi-connected air-cooled air conditioners. The water pump is connected with the first pipeline. The heat exchange efficiency of the heat exchanger is improved, energy consumption is reduced, and the requirements for energy conservation, emission reduction and environmental protection of the data center are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to data center energy -conserving air conditioning cooling temperature field, especially a kind of water system of multi-connected air-cooled air conditioner. BACKGROUND

[0002] The increasingly intensified energy saving and emission reduction and green environmental protection appeal in the world, the construction and operation of data center as the biggest energy consumption of IT industry have put forward higher requirements.The reduction of data center PUE value has become the primary appeal of owner and designer constructor.

[0003] The outdoor unit of multi-connected air-cooled air conditioner used by data center passes through heat exchanger to transfer heat to air side, accompanied by phase change of refrigerant to achieve heat exchange effect, so as to realize the transfer of heat in the whole refrigeration cycle.However, in actual application, it usually faces problems such as dense unit arrangement, high summer ambient temperature, etc., which greatly reduces the heat exchange efficiency of unit heat exchanger, increases energy consumption, and leads to high PUE value of data center. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the present application provides a water system of multi-connected air-cooled air conditioner, which solves the technical problems of low heat exchange efficiency and high energy consumption of the heat exchanger of the multi-connected air-cooled air conditioner used by the existing data center, which leads to high PUE value of data center.The present application improves the heat exchange efficiency of heat exchanger, reduces energy consumption, and meets the requirements of energy saving and emission reduction and green environmental protection of data center.

[0005] The present application provides a water system of multi-connected air-cooled air conditioner for improving the heat exchange efficiency of the heat exchanger of multi-connected air-cooled air conditioner, which comprises: a water supply pipeline, including a first pipeline section, a second pipeline section and at least one third pipeline section, the second pipeline section extends along the first direction, the third pipeline section is connected to the second pipeline section and extends along the second direction, and the second direction is perpendicular to the first direction;The first pipeline section is connected to the second pipeline section and is configured to deliver cooling water to each third pipeline section;Wherein, a plurality of water outlets are arranged on the third pipeline section along the second direction;At least one wet film assembly is arranged at least partially at the lower part of the corresponding third pipeline section in the direction of gravity, and is arranged close to the heat dissipation surface of the corresponding heat exchanger of multi-connected air-cooled air conditioner;Wherein, each third pipeline section is provided with at least one wet film assembly;Water pump is connected to the first pipeline section, and is used to pump cooling water into the water supply pipeline.

[0006] In some embodiments, the water system further comprises: at least one water receiving container arranged at a lower part of the gravity direction of the corresponding wet membrane assembly, configured to receive the cooling water dripped from the wet membrane assembly; a circulating water tank for storing the cooling water, wherein the outlet of the circulating water tank is connected to the water pump; and a water return pipeline connected to the inlets of all the water receiving containers and the circulating water tank, configured to guide the condensed water collected in the water receiving containers back to the circulating water tank.

[0007] In some embodiments, the volume V of the circulating water tank satisfies the following relationship: V=Q*T1, wherein Q is the working flow rate of the water pump, and T1 is a preset circulating time, which is between 2 and 4 minutes.

[0008] In some embodiments, the second direction and the horizontal plane form a first preset inclination angle, so that the cooling water in the third pipeline section flows from one end to the other end under the action of gravity.

[0009] In some embodiments, the water supply pipeline further comprises: at least one fourth pipeline section, the fourth pipeline section comprising a fourth inlet and at least two fourth outlets, wherein the fourth inlet is connected to the second pipeline section, and each fourth outlet is connected to a third pipeline section.

[0010] In some embodiments, the wet membrane assembly comprises: a fixed support detachably connected to the heat dissipation surface of the corresponding heat exchanger; and at least one wet membrane limited in the fixed support and parallel to the heat dissipation surface of the heat exchanger, wherein the wet membrane and the vertical plane form a second preset inclination angle, so that at least part of the wet membrane moves to abut against the fixed support under the action of gravity.

[0011] In some embodiments, the number of wet membranes is N, when 0

[0012] In some embodiments, the diameter of the water outlet hole is between 2 and 4 mm, and the distance between adjacent two water outlet holes is between 35 and 45 mm.

[0013] The water system of the multi-connected air-cooled air conditioner provided in the application effectively reduces the ambient temperature of the heat dissipation surface air side of the heat exchanger of the multi-connected air-cooled air conditioner, so that the high-temperature vapor in the finned coil of the heat exchanger can be fully exchanged with the air cooled by the heat dissipation surface air side, achieving the cooling effect, significantly improving the heat exchange efficiency of the heat exchanger, reducing the energy consumption of the multi-connected air-cooled air conditioner, being conducive to reducing the PUE value of the data center, and meeting the requirements of energy saving, emission reduction and green environmental protection of the data center. BRIEF DESCRIPTION OF DRAWINGS

[0014] The technical solutions of the application will be further described below in combination with the drawings and embodiments, and the drawings are as follows:

[0015] Figure 1 is a structural schematic diagram of one of the embodiments of the water system of the application installed in the outdoor unit of the multi-connected air-cooled air conditioner;

[0016] Figure 2 is a partial structural schematic diagram of one of the embodiments of the water system of the application, wherein the second pipe section of the water supply pipe starts to distribute water from the middle to both ends;

[0017] Figure 3 is a partial structural schematic diagram of one of the embodiments of the water system of the application, wherein the second pipe section of the water supply pipe starts to distribute water from the left end to the right end;

[0018] Figure 4 is a partial structural schematic diagram of one of the embodiments of the water system of the application, wherein the second pipe section of the water supply pipe starts to distribute water from the right end to the left end;

[0019] Figure 5 is a structural schematic diagram of the third pipe section in one of the embodiments of the water system of the application;

[0020] Figure 6 is a structural schematic diagram of one of the embodiments of the water system of the application, wherein the wet membrane assembly is installed in the outdoor unit of the multi-connected air-cooled air conditioner;

[0021] Figure 7 is Figure 6 a partial structural enlarged schematic diagram of S1 in the above;

[0022] Figure 8 is Figure 6 a partial structural enlarged schematic diagram of S2 in the above;

[0023] Figure 9 is Figure 6 a partial structural enlarged schematic diagram of S3 in the above;

[0024] Figure 10 is a control logic block schematic diagram of one of the embodiments of the water system of the application.

[0025] Reference signs are as follows:

[0026] 1 - heat exchanger, 11 - heat dissipation surface;

[0027] 2 - water supply pipeline, 21 - first pipeline section, 22 - second pipeline section, 23 - at least one third pipeline section, 231 - water outlet hole, 24 - fourth pipeline section, 241 - fourth water inlet end, 242 - fourth water outlet end;

[0028] 3 - wet membrane assembly, 31 - fixed support, 311 - side support, 3111 - third baffle, 3112 - third folding edge A, 3113 - third folding edge B, 312 - upper support, 3121 - second baffle, 3122 - second folding edge A, 3123 - second folding edge B, 313 - lower support, 3131 - first baffle, 3132 - first folding edge A, 3133 - first folding edge B, 3134 - drain port, 314 - threaded fastener, 315 - quick release fastener, 32 - wet membrane, 321 - end face support;

[0029] 4 - water pump; 5 - water receiving container, 6 - circulating water tank, 7 - water return pipeline, 8 - frame body, 9 - fan. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and effect of the present application more clear and definite, the following will make further detailed description on the technical scheme of the present application through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0031] Please refer to Figure 1 and Figure 2 , the present application provides a water system of a multi-connected air-cooled air conditioner, for improving the heat exchange efficiency of a heat exchanger 1 (as shown in Figure 1 ) of the multi-connected air-cooled air conditioner, the water system comprising: a water supply pipeline 2, at least one wet membrane assembly 3, and a water pump 4, the water supply pipeline 2 comprising a first pipeline section 21, a second pipeline section 22, and at least one third pipeline section 23 (as shown in Figure 2 ), the second pipeline section 22 extending along a first direction, and the third pipeline section 23 being connected to the second pipeline section 22 and extending along a second direction, the second direction being perpendicular to the first direction. The first pipeline section 21 is connected to the second pipeline section 22, and the first pipeline section 21 is configured to deliver cooling water to each third pipeline section 23 through the second pipeline section 22. Wherein, a plurality of water outlet holes 231 (as shown in Figure 5 ) are arranged on the third pipeline section 23 along the second direction at intervals.

[0032] The wet film assembly 3 is at least partially arranged at the lower part of the corresponding third pipeline section 23 in the direction of gravity, and is arranged close to the heat dissipation surface 11 of the heat exchanger 1 of the multi-connected air-cooled air conditioner (as shown in Figure 6 Each third pipeline section 23 is provided with at least one wet film assembly 3. The water outlet hole 231 can be directly arranged on the third pipeline section 23 and faces the corresponding wet film assembly 3.

[0033] The water pump 4 is connected to the first pipeline section 21 and is used to pump cooling water into the water supply pipeline 2.

[0034] In use, the water pump 4 pumps cooling water into the water supply pipeline 2, and the cooling water is transported by the first pipeline section 21 and the second pipeline section 22 into each third pipeline section 23, respectively, and then is sprayed to the corresponding wet film assembly 3 through the water outlet hole 231 under the pressure of the water pump 4, so as to realize wetting of the wet film assembly 3.

[0035] The water system of the multi-connected air-cooled air conditioner provided by the present application pumps cooling water into the water supply pipeline 2 through the water pump 4, and then sprays the cooling water to the corresponding wet film assembly 3 through the plurality of water outlet holes 231 arranged on the at least one third pipeline section, so that the wet film assembly 3 after wetting can take away a large amount of heat when the cooling water evaporates under the action of the airflow, thereby effectively reducing the ambient temperature of the air side of the heat dissipation surface 11 of the corresponding heat exchanger 1, enabling the high-temperature vapor in the finned coil of the heat exchanger 1 to be fully heat-exchanged with the air after the air side of the heat dissipation surface 11 is cooled, achieving a cooling effect, significantly improving the heat exchange efficiency of the heat exchanger 1, and reducing the energy consumption of the multi-connected air-cooled air conditioner, which is conducive to reducing the PUE value of the data center and meeting the requirements of energy saving, emission reduction and green environmental protection of the data center.

[0036] The present application sprays cooling water to the corresponding wet film assembly 3 through the plurality of water outlet holes 231 arranged on the third pipeline section, which has a simple structure and is not easy to be blocked, and compared with the cooling method of directly spraying cooling water to the fins of the heat exchanger 1 through the spray head, the electrochemical corrosion of the fins of the heat exchanger 1 is avoided, and the structural complexity, manufacturing cost and failure rate of the water system are significantly reduced. In addition, the cooling water is centrally supplied to each third pipeline section 23 through the first pipeline section 21 and the second pipeline section 22, so that the water supply pipeline 2 as a whole can have a good water distribution effect, thereby ensuring effective wetting of each wet film assembly 3.

[0037] In order to facilitate the reader to understand the technical scheme of the present application, the first direction in which the second pipeline section 22 extends is defined as the X-axis direction, the second direction in which the third pipeline section 23 extends is defined as the Y-axis direction, and the direction in which the first pipeline section 21 extends is defined as the Z-axis direction, wherein the Z-axis direction takes the direction of gravity as an example.

[0038] The second pipeline section 22 can be arranged to extend along the X-axis direction, i.e., the first direction, in the horizontal plane, and the third pipeline section 23 can be arranged to extend along the Y-axis direction, i.e., the second direction, in the horizontal plane. The length of the second pipeline section 22 extending along the first direction, the length of the third pipeline section 23 extending along the second direction, and the number of third pipeline sections 23 arranged, etc., can be adjusted according to the number and layout of the heat exchangers 1 of the multi-connected air-cooled air conditioning outdoor unit, so as to ensure that the air side of the heat dissipation surface 11 of each heat exchanger 1 of the multi-connected air-cooled air conditioning outdoor unit can correspond to at least one wet membrane assembly 3, and each wet membrane assembly 3 can correspond to one third pipeline section 23 to achieve wetting. The present application does not limit this.

[0039] The width direction of the wet membrane assembly 3 is consistent with the Y-axis direction, i.e., the second direction. When a plurality of wet membrane assemblies 3 are arranged in the gravitational direction lower part of the same third pipeline section 23, the plurality of wet membrane assemblies 3 are arranged "shoulder to shoulder" along the width direction, so as to ensure that the cooling water in the third pipeline section 23 can be sprayed onto the corresponding wet membrane assembly 3 through the corresponding water outlet hole 231 to achieve wetting. Understandably, the gravitational direction lower part of the same third pipeline section 23 can also correspond to only one wet membrane assembly 3, and the present application does not limit this. The actual situation of the multi-connected air-cooled air conditioning outdoor unit can be correspondingly arranged.

[0040] In order to ensure the cooling effect of the wet membrane assembly 3 on the air side of the heat dissipation surface 11 of the heat exchanger 1 of the multi-connected air-cooled air conditioning, the wet membrane assembly 3 is preferably arranged parallel to the heat dissipation surface 11 of the corresponding heat exchanger 1, and there is a certain gap between the two, so that the airflow can pass through the gap between the two to achieve rapid cooling of the air side of the heat dissipation surface 11 of the heat exchanger 1.

[0041] The third pipeline section 23 is preferably inserted into the gravitational direction upper end of the corresponding wet membrane assembly 3 along the width direction in a plug-in fixed manner, so that the water outlet hole 231 can be embedded in the corresponding wet membrane assembly 3, ensuring that the cooling water discharged from the water outlet hole 231 can be sprayed onto the corresponding wet membrane assembly 3, reducing the loss of cooling water.

[0042] Please refer to Figure 1 In some embodiments, the water system further comprises at least one water receiving container 5, a circulating water tank 6, and a return water pipeline 7. The water receiving container 5 is arranged in the gravitational direction lower part of the corresponding wet membrane assembly 3 and is configured to receive the cooling water dripping from the wet membrane assembly 3. The circulating water tank 6 is used to store cooling water, and the water outlet end of the circulating water tank 6 is connected to the water pump 4 to supply cooling water to the water supply pipeline 2. The return water pipeline 7 is connected to all the water receiving containers 5 and the water inlet end of the circulating water tank 6, and is configured to guide the condensed water collected in the water receiving container 5 back to the circulating water tank 6.

[0043] The number of water receiving containers 5 is preferably matched with the number of third pipeline sections 23, that is, one water receiving container 5 is arranged at the lower end of each third pipeline section 23 in the direction of gravity. The water receiving containers are preferably arranged along the second direction to uniformly collect the cooling water dripping from all the wet membrane assemblies 3 corresponding to each third pipeline section 23 through the corresponding water receiving container 5, thereby ensuring the recovery rate of the cooling water and reducing the number of water receiving containers 5, which is conducive to the compact arrangement of the water supply pipeline 2, the wet membrane assembly 3, and the water return pipeline 7 on the outdoor unit of the multi-connected air-cooled air conditioner and saves space.

[0044] The circulating water tank 6 provides water source for the entire water system and collects the cooling water that has passed through the wet membrane assembly 3 but has not been evaporated through the water receiving container 5 and the water return pipeline 7, thereby playing the role of storing and supplying cooling water and recovering the cooling water dripping from the wet membrane assembly 3 and ensuring the economy of the water circulation of the water system. To ensure that the recovered cooling water can automatically return under the action of gravity, the circulating water tank 6 is preferably arranged at the lowest position of the water system in the direction of gravity, and the water inlet end of the circulating water tank 6 is preferably arranged at the high position of the circulating water tank 6 in the direction of gravity. The water return pipeline 7 connects all the water receiving containers 5 and the circulating water tank 6, and returns the collected cooling water to the circulating water tank 6, so that the cooling water can circulate in the water system.

[0045] After the water pump 4 is started, the cooling water in the circulating water tank 6 is pumped into the first pipeline section 21 and the second pipeline section 22 in turn and is delivered to each third pipeline section 23 under the guidance of the second pipeline section 22 and the fourth pipeline section 24. The water pipes used in the water supply pipeline 2 and the water return pipeline 7 are national standard water pipes, and are preferably U-PVC material water pipes. Such material water pipes have the advantages of light weight, corrosion resistance, and small water flow resistance, which is conducive to reducing the energy consumption of the water pump 4.

[0046] In some embodiments, the first pipeline section 21 preferably extends vertically along the Z-axis direction, that is, the direction of gravity, and the second pipeline section 22 is preferably connected to the upper end of the first pipeline section 21 in the direction of gravity. After the water pump 4 stops working, the liquid water in the water supply pipeline 2 will return to the circulating water tank 6 through the vertically arranged first pipeline section 21 under the action of gravity, thereby avoiding water pipe cracking caused by water accumulation in the water supply pipeline 2 in the low-temperature state in winter.

[0047] In some embodiments, the volume V of the circulating water tank 6 satisfies the following relationship: V = Q*T1, where Q is the working flow rate of the water pump 4, and T1 is a preset circulation time, which is between 2 and 4 minutes. As an option, the preset circulation time is 3 minutes by default, that is, V = 3Q (L). The value of Q can be determined according to the flow rate and head curve of the water pump 4, and the volume V of the circulating water tank 6 is set to Q*T1 (L), so that the circulating water tank 6 has the minimum economic volume, thereby ensuring the economy of the cooling water circulation in the water system and avoiding waste of water resources.

[0048] In some embodiments, the second direction forms a first preset inclination angle a1 (not shown in the figure) with the horizontal plane, so that the cooling water in the third pipe section 23 flows from one end to the other end under the action of gravity. The first preset inclination angle a1 can be set between 0° and 30°, preferably between 3° and 10°.

[0049] In order to enable the cooling water in the third pipe section 23 to flow automatically to the corresponding wet membrane assembly 3 under the action of gravity, the water outlet hole 231 is preferably arranged at the lower end of the third pipe section 23 in the direction of gravity and is opened towards the wet membrane assembly 3.

[0050] The second direction forms a first preset inclination angle a1 with the horizontal plane, so that the third pipe section 23 as a whole has an inclination posture with one end higher and the other end lower. After being installed on the outdoor unit of the multi-connected air-cooled air conditioner in this inclination posture, the third pipe section 23 has a certain slope in the axial direction, so that the cooling water in the third pipe section 23 can spontaneously flow from the relatively higher end to the relatively lower end under the action of gravity. The cooling water in the third pipe section 23 can be automatically discharged from the corresponding water outlet hole 231 during spontaneous flow, ensuring the wetting effect of the wet membrane assembly 3 while avoiding water accumulation in the third pipe section 23 after the water pump 4 is stopped, which can prevent the third pipe section 23 from being frozen due to water accumulation in winter.

[0051] Please refer to Figure 2 In some embodiments, the water supply pipe 2 further comprises at least one fourth pipe section 24, and the fourth pipe section 24 comprises a fourth water inlet end 241 and at least two fourth water outlet ends 242. The fourth water inlet end 241 is connected to the second pipe section 22, and each fourth water outlet end 242 is connected to a third pipe section 23. The water supply pipe 2 in this embodiment is taken as an example to illustrate five fourth pipe sections 24, and the fourth water inlet ends 241 of the five fourth pipe sections 24 are connected to the second pipe section 22 along the first direction. The fourth pipe section 24 is taken as an example of a three-way structure, which has two fourth water outlet ends 242.

[0052] The two third pipe sections 23 connected to the same fourth pipe section 24 form a group, so that the two third pipe sections 23 in the same group can correspond to the same group of multiple heat exchangers 1 of the outdoor unit of the multi-connected air-cooled air conditioner. This facilitates the compact arrangement of different groups of third pipe sections 23 of the water supply pipe 2 on the outdoor unit of the multi-connected air-cooled air conditioner and realizes the distribution of cooling water in different groups of third pipe sections 23 of the water supply pipe 2.

[0053] The pipe diameter of the fourth pipe section 24 is preferably consistent with the pipe diameter of the third pipe section 23, so that the cooling water in the water supply pipe 2 can be evenly distributed to each third pipe section 23.

[0054] The water inlet end of the first pipe section 21 can be connected with the water outlet end of the water pump 4 through corresponding joints and water pipes, and the water outlet end of the first pipe section 21 can be connected with the water inlet end of the second pipe section 22 through corresponding joints. The second pipe section 22 can be provided with one water inlet end and at least one water outlet end, and the cooling water transported by the first pipe section 21 is distributed to each water outlet end through the water inlet end of the second pipe section 22. The water inlet end of the third pipe section 23 can be connected with the corresponding water outlet end of the second pipe section 22 through the corresponding fourth pipe section 24, and the tail end of the third pipe section 23 away from the water inlet end can be plugged by a plug to make the cooling water in the third pipe section 23 discharged outward through the water outlet hole 231.

[0055] Please refer to Figure 6 In some embodiments, the wet film assembly 3 includes a fixing support 31 and at least one wet film 32, the fixing support 31 is detachably connected to the heat dissipation surface 11 of the corresponding heat exchanger 1. The wet film 32 is limited in the fixing support 31 and is parallel to the heat dissipation surface 11 of the heat exchanger 1. Among them, the second preset inclination angle α2 (as shown in Figure 1 between the wet film 32 and the vertical plane, so that at least part of the wet film 32 is abutted to the fixing support 31 under the action of gravity.

[0056] The second preset inclination angle α2 between the wet film 32 and the vertical plane makes the wet film 32 able to pour to the side away from the heat dissipation surface 11 of the heat exchanger 1 under the action of gravity, until at least part of the wet film 32 is abutted to the fixing support 31, realizing the limiting of the wet film 32, and making the wet film 32 parallel to the heat dissipation surface 11 of the heat exchanger 1. This kind of structure design makes the wet film 32 be able to be connected to the heat dissipation surface 11 of the corresponding heat exchanger 1 of the multi-connected air-cooled air conditioning outdoor unit in a non-rigid fixed way, and the design of the wet film 32 pouring to the side away from the heat dissipation surface 11 of the heat exchanger 1 also ensures that there is a gap between the wet film 32 and the heat dissipation surface 11 of the heat exchanger 1 for airflow to pass through, ensuring that the wet film 32 can reduce the temperature of the air side of the heat dissipation surface 11 of the heat exchanger 1 through the evaporation of the cooling water after being wetted by the cooling water.

[0057] The fixing support 31 is detachably connected to the heat dissipation surface 11 of the corresponding heat exchanger 1, and the user can take out and replace or clean the wet film 32 by detaching the fixing support 31, which is convenient for use and maintenance.

[0058] Each wet film assembly 3 can be provided with only one wet film 32, or can be provided with multiple wet films 32 at the same time; the air side of the heat dissipation surface 11 of each heat exchanger 1 of the multi-connected air-cooled air conditioner can correspondingly be arranged with one wet film 32, or can correspondingly be arranged with multiple wet films 32 at the same time; the present application does not limit this, as long as the air side of the heat dissipation surface 11 of each heat exchanger 1 is correspondingly arranged with at least one wet film 32, and the effective cooling of the air side of the heat dissipation surface 11 of the heat exchanger 1 can be realized through the wet film 32.

[0059] The top of the wet film 32 is provided with a through hole or a groove (not shown in the figure) along the width direction, i.e., the second direction, of the wet film 32; the third pipeline section 23 is inserted into the upper end of the corresponding wet film 32 through the through hole or the groove, so that the cooling water can be sprayed onto the upper end of the wet film 32 through the water outlet hole 231, and wet the entire wet film 32 under the action of gravity and the liquid absorption characteristics of the wet film 32 itself.

[0060] In some embodiments, the second preset inclination angle a2 can be set to be between 0° and 30°, preferably between 10° and 20°. Due to the existence of the second preset inclination angle a2, the wet film 32 is inclined to the side away from the heat dissipation surface 11 of the heat exchanger 1, compared with the vertical arrangement of the wet film 32, the cooling water will not easily drip from the wet film 32, which improves the residence time of the cooling water on the wet film 32, ensures the cooling effect of the air side of the heat dissipation surface 11 of the heat exchanger 1, and reduces the waste of water resources. In addition, the wet film 32 is inclined to the side away from the heat dissipation surface 11 of the heat exchanger 1, compared with the vertical arrangement of the wet film 32, which is beneficial to improve the relative arrangement area of the wet film 32 and the heat dissipation surface 11 of the heat exchanger 1, and further improves the cooling effect of the air side of the heat dissipation surface 11 of the heat exchanger 1.

[0061] Please refer to Figures 6 to 9 In some embodiments, the fixing support 31 includes at least two side supports 311, at least one upper support 312, and at least one lower support 313, and the side supports 311, the upper support 312, and the lower support 313 can be cut from a Z-shaped steel with a suitable size.

[0062] The lower support 313 and the upper support 312 can be arranged to extend along the second direction, and the extension length can be less than the width of the wet film 32, or can be greater than the width of the wet film 32, which is not limited in the present application, as long as the wet film 32 can be stably positioned.

[0063] Please refer to Figure 7The lower support 313 comprises a first baffle 3131 in the middle, a first folded edge A 3132 and a first folded edge B 3133 vertically connected to the two sides of the first baffle 3131 and folded in opposite directions, wherein the first folded edge A 3132 is tightly attached to the lower part of the heat dissipation surface 11 of the heat exchanger 1 along the second direction and is fixed by the threaded fastener 314, so that the first baffle 3131 is perpendicular to the heat dissipation surface 11 of the heat exchanger 1, and the first folded edge B 3133 is parallel to the heat dissipation surface 11 of the heat exchanger 1 and is folded upward to the upper part of the first baffle 3131 in the direction of gravity. The bottom of the wet film 32 abuts against the first baffle 3131 and is at least partially stopped at the first folded edge B 3133 to limit the bottom of the wet film 32.

[0064] A plurality of drainage openings 3134 are preferably provided on the lower support 313, which can be opened only on the first baffle 3131 or simultaneously on at least one of the first baffle 3131, the first folded edge A 3132 and the first folded edge B 3133. During use, the cooling water on the wet film 32 can smoothly flow into the corresponding water receiving container 5 through the plurality of drainage openings 3134, realizing the recycling of the cooling water.

[0065] Please refer to Figure 8 The upper support 312 comprises a second baffle 3121 in the middle, a second folded edge A 3122 and a second folded edge B 3123 vertically connected to the two sides of the second baffle 3121 and folded in opposite directions, wherein the second folded edge A 3122 is tightly attached to the upper part of the heat dissipation surface 11 of the heat exchanger 1 along the second direction and is fixed by the threaded fastener 314, so that the second baffle 3121 is perpendicular to the heat dissipation surface 11 of the heat exchanger 1, and the second folded edge B 3123 is parallel to the heat dissipation surface 11 of the heat exchanger 1 and is folded downward to the lower part of the second baffle 3121 in the direction of gravity. The upper part of the wet film 32 abuts against the second baffle 3121, and due to the presence of the second pre-set inclination angle, the upper part of the wet film 32 is at least partially stopped at the second folded edge B 3123 under the action of gravity, to limit the upper part of the wet film 32.

[0066] Please refer to Figure 9The side support 311 comprises a third baffle 3111 in the middle, a third folding edge A 3112 and a third folding edge B 3113 which are vertically connected to the two sides of the third baffle 3111 and are folded in opposite directions, wherein the third folding edge A 3112 is tightly attached to one side of the heat dissipation surface 11 of the heat exchanger 1 along the height direction and is fixed by the quick release fastener 315 for convenient disassembly, so that the third baffle 3111 is perpendicular to the heat dissipation surface 11 of the heat exchanger 1, and the third folding edge B 3113 is parallel to the heat dissipation surface 11 of the heat dissipation surface 11 and is folded to the inside of the third baffle 3111. The side of the wet film 32 abuts against the third baffle 3111 and is at least partially stopped at the third folding edge B 3113. The two side supports 311 can be arranged left and right to limit the wet film 32 on both sides.

[0067] When in use, the user can conveniently manually disassemble the quick release fastener 315 to disassemble at least one side support 311, so that the user can directly pull out the wet film 32 from one side of the fixing support 31, which is simple and convenient to operate.

[0068] The quick release fastener 315 can be a butterfly-shaped hand screw or a quick release fastener composed of a wing-shaped nut and a bolt, or other types such as a quick release threaded fastener, a quick release locking pin, a spring pull pin, etc. The threaded fastener 314 used to fix the upper support 312 and the lower support 313 can also be a quick release fastener of any of the above, which is not limited in the present application, as long as it can realize the convenient disassembly of the fixing support 31 and the convenient installation and disassembly of the wet film 32.

[0069] Please refer to Figures 6 to 9 In some embodiments, the outer end surface of the wet film 32 away from the heat dissipation surface 11 of the heat exchanger 1 is provided with an end surface support 321 composed of a plurality of interlaced strip baffles. The upper and lower ends of the end surface support 321 can abut and be limited in the upper support 312 and the lower support 313, and the left and right ends of the end surface support 321 can abut and be limited in the corresponding side supports 311. The end surface support 321 supports the wet film 32 from the outside, avoiding the problem that the middle part of the wet film 32 is not supported and the local periphery of the wet film 32 is partially separated from the fixing support 31, and ensuring the reliability of the fixing support in limiting the wet film 32. In addition, the end surface support 321 has a plurality of hollow areas, which does not affect the evaporation and heat absorption of the cooling water on the wet film 32.

[0070] In some embodiments, the number of wet films 32 in the water system is N, when 0 < N ≤ 4, the pipe diameter D1 of the first pipe section 21, the pipe diameter D2 of the second pipe section 22 and the pipe diameter D3 of the third pipe section 23 satisfy the following relationship: D1 = D2 = D3.

[0071] When 4 < N ≤ 10, the pipe diameter D1 of the first pipe section 21, the pipe diameter D2 of the second pipe section 22, and the pipe diameter D3 of the third pipe section 23 satisfy the following relationship: D3 < D1 ≤ D2, and D2 = 2 * D3.

[0072] The present application optimizes the matching relationship between the pipe diameters of the first pipe section 21, the second pipe section 22, and the third pipe section 23 of the water supply pipeline 2 and the total number of wet membranes 32. When the number of wet membranes 32 is relatively small, the overall system operating pressure is small. At this time, the first pipe section 21, the second pipe section 22, and the third pipe section 23 are made of water pipes with the same pipe diameter, which ensures normal water supply of the water supply pipeline 2 while reducing the water flow resistance and energy loss of each pipe section, thereby reducing the overall energy consumption of the water system.

[0073] When the number of wet membranes 32 is relatively large, it can be known that the number of heat exchangers 1 of the outdoor unit of the multi-connected air-cooled air conditioner is relatively large, and the water system is relatively high. At this time, the pipe diameter of the third pipe section 23 is set to be smaller than the pipe diameter of the first pipe section 21, the pipe diameter of the first pipe section 21 is set to be smaller than or equal to the pipe diameter of the second pipe section 22, and the pipe diameter of the second pipe section 22 is set to be twice the pipe diameter of the third pipe section 23. This makes the water supply pipeline 2 have a more optimal water conveying efficiency, realizes good cooling water distribution in a limited space, and improves the cooling water distribution uniformity effect. The flow in the second pipe section 22 is reasonably distributed to each branch third pipe section 23, and the flow of each branch third pipe section 23 is stable and controllable, which reduces the water hammer effect in the water supply pipeline 2, avoids the generation of turbulence, and makes the water supply pipeline 2 as a whole to produce excellent water distribution effect.

[0074] Please refer to Figure 5 In some embodiments, the hole diameter of the water outlet hole 231 on the third pipe section 23 is between 2-4mm, and the spacing between adjacent two water outlet holes 231 is between 35-45mm.

[0075] In specific implementation, the third pipe section 23 is preferably made of a U-PVC material water pipe with a pipe diameter DN20 (an outer diameter of 25mm). The extension length L of the third pipe section 23 along the second direction can be set to 2000mm. Forty-five water outlet holes 231 can be arranged on the third pipe section 23 along the second direction, which can be divided into two groups. The spacing L2 between the two groups of water outlet holes 231 can be set to 100mm, the spacing L1 between adjacent two water outlet holes 231 in the same group can be set to 40mm, and the hole diameter of the water outlet hole 231 can be set to 3mm.

[0076] The application optimizes and improves the water distribution design of the wet membrane assembly 3, optimizes the pipe diameter of the third pipe section 23, the opening number of the water outlet holes 231, the hole distance between the water outlet holes 231, the hole diameter of the water outlet holes 231, and the pipe diameter matching relationship of the first pipe section 21, the second pipe section 22 and the third pipe section 23 in the water supply pipeline 2, so that the water supply pipeline 2 of the water system as a whole can produce excellent water distribution effect, ensure the wetting effect of the wet membrane 32, improve the heat exchange efficiency of the heat exchanger 1 of the multi-connected air-cooled outdoor unit, reduce the power consumption, be conducive to reducing the PUE value of the data center, meet the energy saving, emission reduction and green environmental protection requirements of the data center.

[0077] In some embodiments, the second pipe section 22 of the water supply pipeline 2 can be provided at any position of the left end, the right end or the middle of the length direction. The first pipe section 21 of the water supply pipeline 2 preferably extends in the vertical direction, and the lower end in the gravity direction is the water inlet end, and the upper end is the water outlet end. As shown in Figure 3 The water outlet end of the first pipe section 21 can be connected to the left end of the second pipe section 22, and the left end of the second pipe section 22 is the water inlet end, and the water is distributed from the left end to the right end in the length direction. Figure 4 The water outlet end of the first pipe section 21 can also be connected to the right end of the second pipe section 22, and the right end of the second pipe section 22 is the water inlet end, and the water is distributed from the right end to the left end in the length direction. Figure 2 The water outlet end of the first pipe section 21 can also be connected to the middle of the second pipe section 22, and the middle of the second pipe section 22 is the water inlet end, and the water is distributed from the middle to both ends. The second pipe section 22 has excellent water distribution effect in these three water distribution modes, and can realize efficient water supply of the water supply pipeline in limited space, effectively improving the water distribution uniformity of each wet membrane 32.

[0078] Please refer to Figure 1 and Figure 6 In some embodiments, the outdoor unit of the multi-connected air-cooled air conditioner includes five racks 8 arranged side by side in the first direction, and each rack 8 is fixedly connected to a group of heat exchangers 1 arranged in a V shape opposite to each other, and the heat exchanger 1 and the vertical plane form a preset second inclination angle α2, so that the heat exchanger 1 is in a posture of tilting outward of the rack 8.

[0079] The second pipe section 22 of the water supply pipeline 2 is arranged on the upper part of one end of the frame 8 along the first direction, and the third pipe section 23 of the water supply pipeline 2 is taken as an example. The ten third pipe sections 23 are divided into five groups, each group has two, and each is connected to the second pipe section 22 through the fourth pipe section 24 of the three-way structure, and is arranged on the upper part of both sides of each frame 8 along the second direction. The wet membrane assembly 3 of the water system is taken as an example, and the ten wet membrane assemblies 3 are divided into five groups, each group has two, and each is fixedly connected to the heat dissipation surface 11 of the corresponding heat exchanger 1 on the air side, so that the wet membrane 32 of the wet membrane assembly 3 and the vertical plane form a preset second inclination angle α2, and the wet membrane 32 is parallel to the heat dissipation surface 11 of the corresponding heat exchanger 1. The third pipe section 23 is inserted and fixed on the upper end of the corresponding wet membrane 32 along the second direction, and the water outlet hole 231 is embedded in the corresponding wet membrane 32.

[0080] Please refer to Figure 1 and Figure 10 In some embodiments of the present application, a control method for a water system of a multi-connected air-cooled air conditioner is provided. The water system is any of the water systems described above, and the multi-connected air-cooled air conditioner is any of the multi-connected air-cooled air conditioners described above. The multi-connected air-cooled air conditioner includes the heat exchanger 1 described in any of the above and the fan 9 (as shown in Figure 1 The fan 9 can be provided in multiple numbers and fixedly installed at the upper opening of the frame 8 of the outdoor unit. The fan 9 is configured to allow airflow to flow between the heat dissipation surface 11 of the heat exchanger 1 and the corresponding wet membrane assembly 3 to achieve heat exchange.

[0081] The control method includes: when the ambient temperature T is higher than the preset water system opening temperature Tset, if the water system is in the water saving mode, when the feedback speed Sfb of the fan 9 reaches 100%, the condensing pressure Pc reaches the condensing pressure high alarm value Pha, and the water system is in the wet working condition and has no abnormality, the water pump 4 is started to run; and / or when the ambient temperature T is higher than the preset water system opening temperature Tset, if the water system is in the energy saving mode and the water pump 4 is not started, when the feedback speed Sfb of the fan 9 reaches the preset starting speed Sset, and the water system is in the wet working condition and has no abnormality, the water pump 4 is started to run.

[0082] In summer, the ambient temperature is relatively high, and the heat dissipation of the heat exchanger 1 of the multi-connected air-cooled air conditioner is poor. When the ambient temperature T is higher than the preset water system opening temperature Tset (which can be set to 25℃), the control method described above is performed on the water system. It can be understood that whether the water system is in the water saving mode or in the energy saving mode, it is necessary to determine whether the outdoor unit of the multi-connected air-cooled air conditioner is started and whether the system is available.

[0083] Before the water system is started, the heat exchanger 1 can be used to increase the air flow on the air side of the heat dissipation surface 11 by increasing the rotation speed of the fan 9, thereby improving the heat exchange efficiency of the heat exchanger 1. If this method can improve the heat exchange effect of the heat exchanger 1, the water pump 4 of the water system does not need to be started to wet the wet film 32, which can maximize the reduction of water system resource consumption and achieve the purpose of energy saving and consumption reduction.

[0084] Please refer to Figure 10 In some embodiments, when the ambient temperature T is higher than the preset water system starting temperature Tset, if the current mode Model of the water system is in the water saving mode, the feedback rotation speed Sfb of the fan 9 and the condensing pressure value Pc are further judged. When the feedback rotation speed Sfb of the fan 9 reaches 100% (i.e., the fan 9 is full speed), and the condensing pressure Pc reaches the high alarm value Pha of the condensing pressure, it indicates that the condensing pressure Pc of the outdoor unit of the multi-split air conditioner has reached the limit state, and the rotation speed of the fan 9 cannot be further increased, so the water system must be started to effectively reduce the condensing pressure Pc of the unit. Of course, the starting condition of the water system is also subject to other necessary conditions, such as further judging whether the current system working condition is in a wet working condition, whether the water pump 4 and the water level of the circulating water tank 6 have fault alarms and other abnormalities, and the water pump 4 starting operation can be performed after the corresponding conditions are met. It can be understood that in the case that the condensing pressure of the outdoor base can be suppressed, the water pump 4 starting operation does not need to be performed to avoid waste of water resources.

[0085] According to the control method provided in the present application, when the ambient temperature is higher than the preset water system starting temperature, if the water system is in the water saving mode, the water pump 4 of the water system is allowed to start only when the feedback rotation speed of the fan 9 of the multi-split air conditioner reaches 100% and the condensing pressure reaches the high alarm value. This avoids the waste of resources caused by starting the water system when the multi-split air conditioner is running at low load, and the water saving effect is better.

[0086] Please refer to Figure 10 In some embodiments, when the ambient temperature T is higher than the preset water system starting temperature Tset, if the current mode Model of the water system does not belong to the water saving mode, it is judged whether the current mode Model of the water system belongs to the energy saving mode. If it belongs to the energy saving mode, it is judged whether the water pump 4 has been started at this time. If the water pump 4 has not been started, it is judged whether the feedback rotation speed Sfb of the fan 9 has reached the preset starting rotation speed Sset of the water system. If Sfb=Sset, it is judged whether the current system working condition is in a wet working condition, whether the water pump 4 and the water level of the circulating water tank 6 have fault alarms and other abnormalities, and the water pump 4 starting operation can be performed after the corresponding conditions are met. In this process, if any condition is not met, the water pump 4 starting operation does not need to be performed.

[0087] In combination with the control method provided in the present application, when the ambient temperature is higher than the preset water system opening temperature, if the water system is in the energy saving mode and the water pump 4 is not started, the water pump 4 of the water system is allowed to start only when the feedback rotating speed of the fan 9 of the multi-connected air-cooled air conditioner reaches the preset starting rotating speed, so that the ambient air temperature on the air side of the heat dissipation surface 11 of the heat exchanger 1 is effectively reduced by using the water evaporation heat absorption principle, the refrigerant in the finned coil pipe and the air can be fully exchanged, the refrigerant temperature is effectively reduced, and the heat exchange efficiency of the heat exchanger 1 is improved. The control method of the water system provided in the present application can well combine the system requirements, accurately control the start-stop action of the water system, and has better energy saving effect.

[0088] The control method of the water system provided in the present application has two control modes, namely the water saving mode and the energy saving mode, and the two modes are used alternatively to control the operation of the water system. After the technical scheme of the present application is adopted, the multi-connected air-cooled air conditioner used in the data center can better adapt to the high-temperature environment operation in summer, the heat exchange efficiency of the heat exchanger 1 is improved, the energy consumption is reduced, the PUE value of the data center can be reduced to below 2, and the requirements of energy saving, emission reduction and green environmental protection of the data center are met.

[0089] If the current mode Model does not belong to the water saving mode and the energy saving mode, it indicates that the operation pressure of the multi-connected air-cooled air conditioner outdoor unit is not high at this time, and the water system does not need to be opened to assist the heat dissipation of the heat exchanger 1.

[0090] Please refer to Figure 10 In some embodiments, the method for starting the water pump 4 to operate includes: within the first 3 minutes of the operation of the water pump 4, the water pump 4 is opened for 5 seconds and closed for 15 seconds, and the cycle is repeated until the operation time t reaches 3 minutes; within the 3rd-7th minute of the operation of the water pump 4, the water pump 4 is opened for 10 seconds and closed for 10 seconds, and the cycle is repeated until the operation time t reaches 7 minutes; within the 7th-10th minute of the operation of the water pump 4, the water pump 4 is opened for 15 seconds and closed for 5 seconds, and the cycle is repeated until the operation time t reaches 10 minutes; after the water pump 4 operates for 10 minutes, the water pump 4 is kept open.

[0091] If the water pump 4 is kept open and runs immediately after starting, the third pipeline section 23 of the water pipeline 2 will continuously spray a large amount of cooling water to the corresponding wet membrane assembly 3 in the initial state, and the wet membrane 32 is relatively dry in the initial state, and has insufficient affinity with the cooling water, so that it cannot immediately absorb all the cooling water, which will cause part of the cooling water to be lost. However, in the present application, the control method controls the water pump 4 to run in different modes in a time period within the first 10 minutes of the operation of the water pump 4, so that the third pipeline section 23 can gradually spray cooling water to the corresponding wet membrane 32, and the wet membrane 32 is gradually wetted, which significantly reduces the unnecessary loss of cooling water on the wet membrane 32, improves the recycling rate of the cooling water, and is beneficial to energy saving and consumption reduction.

[0092] In the prior art, the cooling water is directly sprayed to the fins of the heat exchanger 1 through the spray head to assist heat dissipation. If the water pump 4 keeps running constantly from the moment of starting, a large amount of cooling water will evaporate and absorb heat on the air side of the heat dissipation surface 11 of the heat exchanger 1, thereby taking away a large amount of heat, causing the condensing pressure of the unit to rapidly decrease, the refrigerant in the finned coil rapidly vaporizes before entering the fluorine pump, cavitation is generated, the fluorine pump is prone to liquid supply interruption, and then the refrigerating capacity is lost instantaneously.

[0093] The method for starting the water pump 4 provided in the application delays the constant opening time of the water pump 4 in the first ten minutes of starting the water pump 4 in three time periods, ensures the water supply amount for gradually wetting the wet membrane 32, avoids applying a large amount of cooling water to the air side of the heat dissipation surface 11 of the heat exchanger 1 in the initial stage of starting the water pump 4, prevents the heat exchanger 1 from losing a large amount of heat in a short time, avoids the problems of cavitation at the inlet of the fluorine pump caused by the rapid decrease of the condensing pressure due to the instant starting of the water pump 4, and solves the problems of fluorine pump inlet flow interruption, liquid supply loss, and system refrigeration loss.

[0094] The above is only an embodiment of the application, and does not limit the patent range of the application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, is also included in the patent protection range of the application.

Claims

1. A water system of a multi-connected air-cooled air conditioner for improving the heat exchange efficiency of a heat exchanger (1) of a multi-connected air-cooled air conditioner, characterized by, The water system comprises: a water supply pipeline (2) comprising a first pipeline section (21), a second pipeline section (22) extending in a first direction, and at least one third pipeline section (23) connected to the second pipeline section (22) and extending in a second direction perpendicular to the first direction; the first pipeline section (21) is connected to the second pipeline section (22) and configured to supply cooling water to each third pipeline section (23); a plurality of water outlets (231) are arranged on the third pipeline section (23) in the second direction; at least one wet membrane assembly (3) arranged at least partially below the gravity direction of the corresponding third pipeline section (23) and close to the heat dissipation surface (11) of the corresponding multi-connected air-cooled air conditioner heat exchanger (1); each third pipeline section (23) is provided with at least one wet membrane assembly (3); a water pump (4) connected to the first pipeline section (21) for pumping cooling water into the water supply pipeline (2).

2. The water system of the multi-connected air-cooled air conditioner according to claim 1, characterized in that, The water system further comprises: at least one water receiving container (5) arranged below the gravity direction of the corresponding wet membrane assembly (3) and configured to receive the cooling water dripping from the wet membrane assembly (3); a circulating water tank (6) for storing cooling water, the water outlet of the circulating water tank (6) being connected to the water pump (4); a return water pipeline (7) connected to all the water receiving containers (5) and the water inlet of the circulating water tank (6) and configured to guide the condensed water collected in the water receiving containers (5) back to the circulating water tank (6).

3. The water system of the multi-connected air-cooled air conditioner according to claim 2, characterized in that, The volume V of the circulating water tank (6) satisfies the following relationship: V = Q*T1, wherein Q is the working flow rate of the water pump (4) and T1 is a preset circulation time, the preset circulation time being between 2 and 4 minutes.

4. The water system of the multi-connected air-cooled air conditioner according to claim 1, wherein The second direction forms a first preset inclination angle with the horizontal plane, so that the cooling water in the third pipeline section (23) flows from one end to the other end under the action of gravity.

5. The water system of the multi-connected air-cooled air conditioner according to claim 1, wherein The water supply pipeline (2) further comprises: at least one fourth pipeline section (24) comprising a fourth water inlet (241) and at least two fourth water outlets (242), wherein the fourth water inlet (241) is connected to the second pipeline section (22) and each fourth water outlet (242) is connected to a third pipeline section (23).

6. The water system of the multi-connected air-cooled air conditioner according to any one of claims 1 to 5, characterized in that, The wet membrane assembly (3) comprises: a fixed support (31) detachably connected to the heat dissipation surface (11) of the corresponding heat exchanger (1); at least one wet membrane (32) limited in the fixed support (31) and parallel to the heat dissipation surface (11) of the heat exchanger (1); wherein the wet membrane (32) forms a second preset inclination angle with the vertical plane, so that at least part of the wet membrane (32) is actively abutted to the fixed support (31) under the action of gravity.

7. The water system of the multi-connected air-cooled air conditioner according to claim 6, wherein The number of the wet films (32) is N, when 0 < N ≤ 4, the pipe diameter D1 of the first pipe section (21), the pipe diameter D2 of the second pipe section (22) and the pipe diameter D3 of the third pipe section (23) satisfy the following relationship: D1 = D2 = D3. When 4 < N ≤ 10, the pipe diameter D1 of the first pipe section (21), the pipe diameter D2 of the second pipe section (22) and the pipe diameter D3 of the third pipe section (23) satisfy the following relationship: D3 < D1 ≤ D2, and D2 = 2 * D3.

8. The water system of the multi-connected air-cooled air conditioner according to any one of claims 1 to 5, characterized in that, The aperture of the water outlet hole (231) is between 2-4mm, and the interval between two adjacent water outlet holes (231) is between 35-45mm.

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