阅读说明：本技术 复合制冷系统和数据中心 (Composite refrigeration system and data center ) 是由 宋金良 陈伟 于 2021-08-24 设计创作，主要内容包括：本申请提供一种复合制冷系统,以及一种配备该复合制冷系统的数据中心。复合制冷系统包括相互独立的室内风道和室外风道,室内风道与室外风道于复合制冷系统的换热区内交汇。换热区内设有一级换热芯、二级换热芯和第一侧向风道,换热区构造为室外风道的一部分,一级换热芯、第一侧向风道和二级换热芯沿室外风道的流通方向依次排列。一级换热芯和二级换热芯的内腔还分别构造为室内风道的一部分。第一侧向风道连通于换热区和复合制冷系统的外部之间。本申请复合制冷系统其室外风道中的空气在流经一级换热芯之后,与第一侧向风道内的空气混合以降低温度,其再流向二级换热芯时得以提升换热效率,进而对室内风道中的空气实现更好的散热效果。(The application provides a composite refrigeration system and a data center equipped with the composite refrigeration system. The composite refrigerating system comprises an indoor air duct and an outdoor air duct which are mutually independent, and the indoor air duct and the outdoor air duct are intersected in a heat exchange area of the composite refrigerating system. The heat exchange area is provided with a first-stage heat exchange core, a second-stage heat exchange core and a first lateral air channel, the heat exchange area is constructed as a part of the outdoor air channel, and the first-stage heat exchange core, the first lateral air channel and the second-stage heat exchange core are sequentially arranged along the circulation direction of the outdoor air channel. The inner cavities of the first-stage heat exchange core and the second-stage heat exchange core are respectively constructed as a part of an indoor air duct. The first lateral air duct is communicated between the heat exchange area and the outside of the composite refrigeration system. The air in its outdoor wind channel of this application composite refrigeration system is after the one-level heat transfer core that flows through, mixes with the air in the first side wind channel in order to reduce temperature, and it can promote heat exchange efficiency when flowing to the second grade heat transfer core again, and then realizes better radiating effect to the air in the indoor wind channel.)

1. A composite refrigeration system is characterized by comprising an indoor air duct and an outdoor air duct which are mutually independent, wherein the indoor air duct and the outdoor air duct are intersected in a heat exchange area of the composite refrigeration system;

a first-stage heat exchange core, a second-stage heat exchange core and a first lateral air channel are arranged in the heat exchange area, the heat exchange area is constructed as a part of the outdoor air channel, the first-stage heat exchange core, the first lateral air channel and the second-stage heat exchange core are sequentially arranged along the circulation direction of the outdoor air channel, and an inner cavity of the first-stage heat exchange core and an inner cavity of the second-stage heat exchange core are also respectively constructed as a part of the indoor air channel;

the first lateral air duct is communicated between the heat exchange area and the outside of the composite refrigeration system, and air in the outdoor air duct is mixed with air in the first lateral air duct after flowing through the first-stage heat exchange core and then flows to the second-stage heat exchange core.

2. The compound refrigeration system as recited in claim 1, wherein the outdoor air duct includes an air inlet end and an air outlet end opposite to each other, and a blower unit is disposed on the outdoor air duct, and the blower unit is configured to drive air outside the air inlet end to flow into the outdoor air duct and flow out from the air outlet end.

3. The compound refrigeration system as recited in claim 2, further comprising a first humidification unit disposed between the air inlet end and the primary heat exchanger core for increasing the humidity of the air flowing into the outdoor air duct.

4. The compound refrigeration system according to claim 3, further comprising a second humidification unit located between the primary and secondary heat exchanger cores for increasing the humidity of the air flowing into the secondary heat exchanger core.

5. The compound refrigeration system according to any one of claims 1 to 4, further comprising a refrigeration unit, wherein the refrigeration unit comprises an evaporator, and the evaporator is located in the indoor air duct and located at the rear end of the primary heat-exchange core, the first lateral air duct, and the secondary heat-exchange core along the circulation direction of the indoor air duct.

6. The compound refrigeration system as claimed in any one of claims 1 to 5, wherein the inner cavity of the primary heat exchange core and the inner cavity of the secondary heat exchange core are respectively provided with a check valve, and the check valves are used for controlling the flow path of the indoor air duct.

7. The composite refrigeration system according to claim 6, wherein the indoor air duct comprises an air inlet section and an air return section, the air inlet section is located at the front end of the heat exchange region, the air return section is located at the rear end of the heat exchange region, the first lateral air duct is further communicated with the air inlet section and the air return section respectively, a first air valve is arranged between the first lateral air duct and the air inlet section, a second air valve is arranged between the first lateral air duct and the air return section, and the first lateral air duct is also configured as a part of the indoor air duct.

8. The compound refrigeration system as defined in claim 7, wherein the first lateral air duct further comprises a filter assembly, the filter assembly being located at an end of the first lateral air duct remote from the heat exchange zone, the filter assembly being configured to filter air entering the heat exchange zone from the first lateral air duct.

9. The compound refrigeration system of claim 7 or 8, wherein the first lateral air duct further comprises a partition plate, the partition plate is disposed along a direction perpendicular to a flow direction of the indoor air duct, the partition plate divides the lateral air duct into a first air outlet area and a first air inlet area, the first air outlet area is communicated with the first air valve, and the first air inlet area is communicated with the second air valve.

10. The compound refrigeration system according to any one of claims 7 to 9, further comprising a second lateral air duct, the second lateral air duct being located between the air inlet end and the primary heat exchange core, the second lateral air duct being respectively communicated with the air inlet section and the air return section, a third air valve being disposed between the second lateral air duct and the air inlet section, a fourth air valve being disposed between the second lateral air duct and the air return section, the second lateral air duct also being configured as a part of the indoor air duct.

11. A data center comprising a machine room and a compound refrigeration system according to any one of claims 1 to 10; and the two opposite ends of the indoor air duct are respectively communicated with the rooms of the machine room.

Technical Field

The application relates to the field of fresh air heat dissipation, in particular to a composite refrigeration system and a data center with the composite refrigeration system.

Background

In an indoor scene where a heat source is installed, particularly, where the heat source is installed in a concentrated manner, it is generally necessary to perform heat dissipation processing on an area where the heat source is located. Taking a data center as an example, a plurality of servers are distributed in a machine room of the data center, and a large amount of heat is generated in the operation process of the servers. The data center refrigerating system is used for radiating and cooling the data center so as to ensure that the servers in the data center can normally operate in a preset temperature environment.

The conventional data center refrigerating system is usually internally provided with a multi-stage heat exchange core, and outdoor air is guided to sequentially flow through the multi-stage heat exchange core to realize heat exchange between the outdoor air and the internal air of the data center, so that the effect of radiating the internal air is achieved. However, in the process of outdoor air flowing through the multi-stage heat exchange cores, the temperature of the outdoor air gradually rises, so that the heat exchange core behind the multi-stage heat exchange cores has low heat dissipation efficiency, and the overall heat dissipation effect of the refrigeration system is further influenced.

Disclosure of Invention

The application provides a composite refrigeration system and a data center equipped with the composite refrigeration system. The composite refrigeration system can improve the heat dissipation efficiency of the multistage heat exchange core, and specifically comprises the following technical scheme:

in a first aspect, the present application provides a composite refrigeration system, comprising an indoor air duct and an outdoor air duct that are independent of each other, wherein the indoor air duct and the outdoor air duct intersect in a heat exchange region of the composite refrigeration system; a first-stage heat exchange core, a second-stage heat exchange core and a first lateral air channel are arranged in the heat exchange area, the heat exchange area is constructed as a part of an outdoor air channel, the first-stage heat exchange core, the first lateral air channel and the second-stage heat exchange core are sequentially arranged along the circulation direction of the outdoor air channel, and an inner cavity of the first-stage heat exchange core and an inner cavity of the second-stage heat exchange core are also respectively constructed as a part of an indoor air channel; the first lateral air duct is communicated between the heat exchange area and the outside of the composite refrigeration system, and air in the outdoor air duct is mixed with air in the first lateral air duct after flowing through the first-stage heat exchange core and then flows to the second-stage heat exchange core.

The composite refrigeration system realizes the circulation flow of indoor air through the indoor air channel, and carries out heat exchange on the air in the indoor air channel which circularly flows through the outdoor air channel. Specifically, the indoor air duct and the outdoor air duct which are independent of each other realize a heat exchange function in the heat exchange area, and further dissipate heat of indoor air. The heat exchange area is integrally constructed as one part of the outdoor air duct, and a first-stage heat exchange core, a first lateral air duct and a second-stage heat exchange core are sequentially arranged in the heat exchange area along the circulation direction of the outdoor air duct. The inner cavity of the first-stage heat exchange core and the inner cavity of the second-stage heat exchange core are respectively constructed as a part of an indoor air duct.

From this, outside air can flow through one-level heat transfer core earlier after getting into this application composite refrigeration system through outdoor wind channel to carry out the heat transfer with the partial room air in one-level heat transfer core inner chamber, reduce this partial room air's temperature. Then, the external air flows into the first lateral air channel and is mixed with the external air entering the heat exchange area from the first lateral air channel, and the temperature of the external air flowing out of the primary heat exchange core is reduced. When the mixed external air flows into the secondary heat exchange core again, the mixed external air can exchange heat with the other part of indoor air in the secondary heat exchange core because the temperature is relatively low, and a better heat dissipation effect is achieved. From this, the indoor air in this application composite refrigeration system's the indoor wind channel all carries out the heat transfer with the relatively lower outside air of temperature, and the whole radiating effect of indoor air can be guaranteed to composite refrigeration system's whole heat-sinking capability has been improved.

In a possible implementation manner, the outdoor air duct includes an air inlet end and an air outlet end which are opposite to each other, and the outdoor air duct is further provided with a blower unit for driving air outside the air inlet end to flow into the outdoor air duct and flow out from the air outlet end.

In this implementation, the flow of the outside air in the outdoor air duct is driven by the blower unit, so that the flow rate of the outside air in the outdoor air duct can be increased, and the heat dissipation efficiency can be improved.

In one possible implementation manner, the composite refrigeration system comprises a first humidification unit, and the first humidification unit is located between the air inlet end and the primary heat exchange core and is used for increasing the humidity of air flowing into the outdoor air channel.

In this implementation, the outside air that gets into the one-level heat transfer core and carry out the heat transfer is humidified, can promote the heat exchange efficiency of outside air in the one-level heat transfer core.

In a possible implementation manner, the composite refrigeration system further includes a second humidification unit, and the second humidification unit is located between the secondary heat exchange core and the primary heat exchange core and is used for increasing the humidity of the air flowing into the secondary heat exchange core.

In this implementation, the outside air that gets into the second grade heat transfer core and carry out the heat transfer humidifies, can promote the heat exchange efficiency of outside air in the second grade heat transfer core.

In a possible implementation manner, the composite refrigeration system further includes a refrigeration unit, the refrigeration unit includes an evaporator, and the evaporator is located in the indoor air duct and located at the rear ends of the primary heat exchange core, the first lateral air duct, and the secondary heat exchange core along the circulation direction of the indoor air duct.

In this implementation, the addition of a refrigeration unit allows for mechanical refrigeration of the indoor air. The evaporator of the refrigeration unit is arranged at the rear ends of the first-stage heat exchange core, the first lateral air channel and the second-stage heat exchange core, so that the indoor air precooled by the external air can be mechanically refrigerated, and the refrigeration efficiency of the indoor air is improved.

In a possible implementation mode, the inner cavity of the first-stage heat exchange core and the inner cavity of the second-stage heat exchange core are respectively provided with a stop valve, and the stop valves are used for controlling the circulation path of the indoor air channel.

In this implementation, it is lower to correspond to indoor air temperature, and its heat transfer demand is less scene relatively, and this application composite refrigeration system can utilize the control of check valve to the circulation route in indoor wind channel, and the adjustment obtains the indoor air's of heat transfer flow at present to avoid unnecessary energy consumption.

In a possible implementation mode, the indoor air channel comprises an air inlet section and an air return section, the air inlet section is located at the front end of the heat exchange region in the circulation direction of the indoor air channel, the air return section is located at the rear end of the heat exchange region, the first lateral air channel is further communicated with the air inlet section and the air return section respectively, a first air valve is arranged between the first lateral air channel and the air inlet section, a second air valve is arranged between the first lateral air channel and the air return section, and the first lateral air channel is also constructed as a part of the indoor air channel.

In this implementation, when the first lateral air duct is also configured as a part of the indoor air duct, the primary heat exchange core and the secondary heat exchange core may be closed by the check valve, and indoor air may flow into the return air section from the air inlet section only in the first lateral air duct. At this moment, this application composite refrigeration system can work for the new trend mode, and outside air can follow the first side to the wind channel inflow, mixes the back with the indoor air in the first side direction wind channel, and in the reentrant return air section, the part of realization indoor air exchanges.

In a possible implementation manner, the first lateral air duct further includes a filtering assembly, the filtering assembly is located at one end, far away from the heat exchange area, of the first lateral air duct, and the filtering assembly is used for filtering air entering the heat exchange area from the first lateral air duct.

In this implementation, the outside air that flows into first side direction wind channel is filtered through filtering component, can guarantee the cleanness of room air under the new trend mode, avoids outside impurity inflow indoor.

In a possible implementation manner, the first lateral air duct further comprises a partition board, the partition board is arranged along the circulation direction perpendicular to the indoor air duct, the partition board divides the lateral air duct into a first air outlet area and a first air inlet area, the first air outlet area is communicated with the first air valve, and the first air inlet area is communicated with the second air valve.

In this implementation, utilize the separation of baffle to first lateral air way, can make the indoor air that flows from the air inlet section flow out through first air-out district to make outside air in through first air-in district inflow return air section, realize the complete replacement to indoor air.

In a possible implementation manner, the partition board is a movable partition board, and the gap between the first air inlet area and the first air outlet area can be adjusted by controlling the movement of the partition board in the first lateral air duct, so that part of indoor air in the first air inlet area can flow into the first air outlet area.

In a possible implementation manner, the composite refrigeration system further comprises a second lateral air duct, the second lateral air duct is located between the air inlet end and the first-stage heat exchange core, the second lateral air duct is respectively communicated with the air inlet section and the air return section, a third air valve is arranged between the second lateral air duct and the air inlet section, a fourth air valve is arranged between the second lateral air duct and the air return section, and the second lateral air duct is also constructed as a part of the indoor air duct.

In this implementation, the introduction of the second lateral air duct can supplement the first lateral air duct, and the indoor air exchange capacity of the composite refrigeration system in the fresh air mode is further controlled by utilizing the cooperation of the first lateral air duct and the second lateral air duct, so that the temperature of the indoor air is more accurately regulated.

In a possible implementation manner, the second lateral air duct also includes a filtering assembly, the filtering assembly is located at one end of the second lateral air duct far away from the heat exchange area, and the filtering assembly is used for filtering air entering the heat exchange area from the second lateral air duct.

In a possible implementation manner, the second lateral air duct also comprises a partition board, the partition board is arranged along the circulation direction perpendicular to the indoor air duct, the partition board divides the lateral air duct into a second air outlet area and a second air inlet area, the second air outlet area is communicated with the third air valve, and the second air inlet area is communicated with the fourth air valve.

In a possible implementation manner, by controlling the movement of the partition board in the second lateral air duct, the gap between the second air inlet area and the second air outlet area can be adjusted, and part of indoor air in the second air inlet area can flow into the second air outlet area.

In a second aspect, the present application provides a data center, including a machine room and the compound refrigeration system provided in the first aspect of the present application; wherein, the relative both ends of indoor wind channel communicate with the room of computer lab respectively.

In this application second aspect, because data center's computer lab adopts the compound refrigerating system of above-mentioned first aspect to dispel the heat, consequently this application data center has also possessed the efficiency that above-mentioned radiating efficiency promoted to based on the expansion of above-mentioned each implementation, can realize the new trend mode, and form more accurate air current control to the new trend mode.

Drawings

Fig. 1 is a schematic view of an application scenario of a composite refrigeration system in a data center according to the present application;

FIG. 2 is a schematic illustration of the internal construction of a compound refrigeration system as provided herein;

FIG. 3 is a schematic plan view of a compound refrigeration system provided herein;

FIG. 4 is a schematic view of an outdoor duct of a hybrid refrigeration system according to the present disclosure;

FIG. 5 is a schematic diagram of the internal structure of a prior art compound refrigeration system;

FIG. 6 is a schematic illustration of the internal construction of another compound refrigeration system provided herein;

FIG. 7 is a schematic view of an indoor duct of another compound refrigeration system according to the present disclosure;

FIG. 8 is a schematic plan view of another compound refrigeration system provided herein;

FIG. 9 is a schematic illustration of the internal construction of another compound refrigeration system provided herein;

FIG. 10 is a schematic view of an alternative hybrid refrigeration system of the present application in an operational mode;

FIG. 11 is a schematic view of an alternative hybrid refrigeration system of the present application in an alternative mode of operation;

fig. 12 is a schematic view of an alternative hybrid refrigeration system according to the present application in another operating mode.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The composite refrigeration system of the present application may be used in an indoor environment having a heat source, and is particularly suited for use in an indoor environment in which the heat source is centrally located, such as may be used in a data center. The following description will be given taking a data center as an example.

Please refer to fig. 1, which is a schematic view of a scenario in which the composite refrigeration system 100 of the present application is applied in a data center.

The data center comprises a machine room 200, wherein at least one IT device (such as a server 201) and/or a power supply device and the like are arranged in the machine room 200. The at least one IT device or/and the power supply generate a large amount of heat during operation, and the composite refrigeration system 100 of the present application is used to achieve cooling and heat dissipation in a data center. In the embodiment of the application, the data center may be a micro-module data center, a prefabricated data center, or a floor or a room formed by a building and used for placing the IT server. Based on the data centers with different forms, the composite refrigeration system 100 may be disposed inside the machine room 200 of the data center, may be disposed outside the machine room 200, may be partially disposed inside the machine room 200, and may be partially disposed outside the machine room 200.

In some implementation scenarios, the concept of the data center includes a temperature control system and other supporting devices in addition to IT equipment and power supply devices, and therefore, the composite refrigeration system 100 of the embodiment of the present application can also be regarded as a part of the data center.

The composite refrigeration system 100 of the present application includes an indoor air duct 10 and an outdoor air duct 20, wherein the indoor air duct 10 is communicated with the inside of the machine room 200, and the indoor air duct 10 includes an air intake section 11, an air return section 12 and a heat exchange section 13. The air inlet section 11 and the air return section 12 are respectively communicated with the machine room 200 of the data center, and the air inlet section 11 and the air return section 12 are respectively communicated with the heat exchange section 13 when being respectively far away from one side of the machine room 200. That is, the indoor air duct 10 includes an air inlet section 11, a heat exchange section 13 and an air return section 12 which are sequentially communicated, wherein the heat exchange section 13 is located between the air inlet section 11 and the air return section 12, and the air inlet section 11 and the air return section 12 are respectively communicated to the machine room 200.

The air inlet section 11 is used for pumping indoor air in a machine room 200 of the data center into the indoor air duct 10 and conveying the indoor air to the heat exchange section 13; the heat exchange section 13 is used for radiating and cooling indoor air sent by the air inlet section 11; the air return section 12 is used for sending air subjected to heat dissipation and cooling into the machine room 200 of the data center, so that air circulation flowing and cooling inside the machine room 200 of the data center are achieved. In some embodiments, the heat exchange section 13 is further configured to perform a fresh air ventilation function on part or all of the indoor air, and the part or all of the fresh air can be returned to the machine room 200 through the return air section 12, so as to achieve a partial or all ventilation function in the machine room 200 while achieving a cooling function.

Thus, the machine room 200 of the data center and the indoor air duct 10 form a sealed circulation air path. The compound refrigeration system 100 may take heat generated by the operation of the servers 201 away from the machine room via air flowing out of the return air section 12. After the air is cooled and radiated by the composite refrigeration system 100, the air is sent back to the machine room 200 from the air inlet section 11, and the integral heat radiation of the machine room 200 of the data center is realized. In the embodiment shown in fig. 1, the air intake section 11 is located below the air return section 12. The cold air sent by the air inlet section 11 flows upwards in the machine room, so that the temperature of the air in the machine room can be balanced.

The outdoor air duct 20 and the indoor air duct 10 are independent and sealed from each other, the outdoor air duct 20 penetrates through the composite refrigeration system 100, and opposite ends of the outdoor air duct 20 are respectively communicated with the outside of the composite refrigeration system 100, so that air outside the composite refrigeration system 100 is introduced into the outdoor air duct 20 from one end and flows out of the other end of the outdoor air duct 20 after flowing through the inside of the composite refrigeration system 100. The interior of the compound refrigeration system 100 is also provided with a heat transfer zone 110. The heat exchange section 13 of the indoor air duct 10 is disposed in the heat exchange area 110, and the outdoor air duct 20 passes through the heat exchange area 110. That is, in the composite cooling system 100 of the present application, the indoor air path 10 and the outdoor air path 20 meet at the heat exchange area 110. It can be understood that the external air flowing through the outdoor air duct 20 can exchange heat with the indoor air flowing through the heat exchange section 13 when flowing through the heat exchange section 13, so as to achieve the effect of cooling the indoor air by heat exchange.

On the other hand, since the outdoor air duct 20 passes through the heat exchange area 110, the heat exchange area 110 may also be regarded as a part of the outdoor air duct 20. Referring to fig. 2, in the composite refrigeration system 100 of the present application, the primary heat exchange core 30, the secondary heat exchange core 40, and the first lateral air duct 50 are further disposed in the heat exchange area 110. The air flowing direction along the outdoor air duct 20 is defined as a first direction 001, and the primary heat-exchange core 30, the first lateral air duct 50 and the secondary heat-exchange core 40 are sequentially arranged along the first direction 001, wherein the first lateral air duct 50 is located between the primary heat-exchange core 30 and the secondary heat-exchange core 40. That is, the external air circulating in the outdoor air duct 20 passes through the first-stage heat exchange core 30, then passes through the first lateral air duct 50, and finally passes through the second-stage heat exchange core 40 while passing through the heat exchange area 110.

The primary heat exchange core 30 and the secondary heat exchange core 40 are respectively provided with inner cavities, and the inner cavity of the primary heat exchange core 30 and the inner cavity of the secondary heat exchange core 40 are both constructed as the heat exchange section 13 of the indoor air duct 10. That is, the inner cavity of the first-stage heat exchange core 30 is respectively communicated with the air inlet section 11 and the air return section 12 of the indoor air duct 10, the indoor air in the air inlet section 11 of the indoor air duct 10 can flow into the air return section 12 through the inner cavity of the first-stage heat exchange core 30, and when the indoor air flows through the first-stage heat exchange core 30, the indoor air can form heat exchange with the external air in the outdoor air duct 20, so that the heat exchange effect is achieved. It should be noted that the external air flowing through the outdoor air duct 20 can flow through the outer wall of the first-stage heat exchange core 30 to exchange heat with the indoor air in the inner cavity of the first-stage heat exchange core 30. In other embodiments, the inner cavity of the first-stage heat exchange core 30 may be a hollow inner cavity, which allows the outside air in the outdoor air duct 20 to pass through the hollow area along the first direction 001 while the indoor air circulates in the inner cavity, so as to increase the contact area between the outside air and the first-stage heat exchange core 30, and achieve a better heat exchange effect.

The inner cavity of the secondary heat exchange core 40 is also respectively communicated with the air inlet section 11 and the air return section 12 of the indoor air duct 10, and the other part of indoor air in the air inlet section 11 of the indoor air duct 10 can flow into the air return section 12 through the inner cavity of the secondary heat exchange core 40. The other portion of indoor air may also exchange heat with the outside air in the outdoor air duct 20 while flowing through the secondary heat exchange core 40. Therefore, the indoor air in the indoor air duct 10 can be cooled and dissipated while flowing through the inner cavities of the primary heat exchange core 30 and the secondary heat exchange core 40, respectively. It is understood that the inner cavity of the secondary heat exchanger core 40 may also be a hollow cavity, which is similar in structure and function to the embodiment of the primary heat exchanger core 30. Due to the heat dissipation requirement of the data center machine room 200, the two-stage or multi-stage heat exchange core structure is arranged, the flow of indoor air in the indoor air duct 10 can be increased, and the overall heat dissipation capacity of the composite refrigeration system 100 is improved.

Please refer to fig. 3 for a schematic plan view of the composite refrigeration system 100 of the present application.

The first lateral wind tunnel 50 extends along a second direction 002, and the second direction 002 forms an included angle α with the first direction 001. In the illustrated embodiment, the included angle α is set to 90 degrees. In other embodiments, the included angle α may have other values. The first lateral air duct 50 communicates with the outside of the compound refrigeration system 100 along the second direction 002, so that the outside air on the second direction 002 side of the compound refrigeration system 100 can also flow into the heat exchange area 110 through the first lateral air duct 50. In the illustrated embodiment, opposite ends of the first lateral air duct 50 extend along the second direction 002, and communicate with the outside of the composite refrigeration system 100 at their respective sides, and at this time, the outside air at the opposite sides of the composite refrigeration system 100 can flow into the heat exchange area 110 through the first lateral air duct 50.

As mentioned above, the heat exchange area 110 is configured as a part of the outdoor air duct 20, and the first lateral air duct 50 is located at the front end of the secondary heat exchange core 40 in the external air circulation direction of the outdoor air duct 20. Therefore, as shown in fig. 4, the air path of the outdoor air duct 20 in the composite refrigeration system 100 illustrates that the external air flowing into the heat exchange region 110 from the first lateral air duct 50 can be mixed with the external air flowing through the primary heat exchange core 30, and the mixed air flows into the secondary heat exchange core 40 from the first lateral air duct 50.

Fig. 5 illustrates a schematic internal structure of a conventional compound refrigeration system 100 a. In the illustration of fig. 5, the compound refrigeration system 100a also includes an indoor air duct 10a and an outdoor air duct 20a, and the indoor air duct 10a and the outdoor air duct 20a meet at a heat exchange area 110a of the compound refrigeration system 100 a. The heat exchange area 110a is also provided with a primary heat exchange core 30a and a secondary heat exchange core 40a, and indoor air in the indoor air duct 10a flows through inner cavities of the primary heat exchange core 10a and the secondary heat exchange core 20a respectively and exchanges heat with external air in the outdoor air duct 20 a. Specifically, the outside air in the indoor air duct 10a flows through the first-stage heat exchange core 30a, and then directly flows to the second-stage heat exchange core 40a, so as to sequentially cool the indoor air flowing through the two heat exchange cores.

In the conventional composite refrigeration system 100a shown in fig. 5, when the outside air in the outdoor air duct 20a flows through the first-stage heat exchange core 30a, the temperature difference between the outside air and the indoor air in the first-stage heat exchange core 30a is relatively large, so that a good heat exchange effect can be achieved. And the temperature of the portion of the external air having undergone heat exchange has been increased after the portion of the external air has flowed out of the primary heat exchange core 30 a. When the external air with the subsequent temperature increase continuously flows into the secondary heat exchange core 40a, the temperature difference between the external air with the subsequent temperature increase and the indoor air in the secondary heat exchange core 40a is reduced, so that the heat dissipation effect of the air in the indoor space of the secondary heat exchange core 40a is relatively reduced, and the overall heat dissipation effect of the conventional compound refrigeration system 100a is poor.

In the composite refrigeration system 100 of the present application, the structure of the first lateral air duct 50 is utilized to introduce air from the outside of the composite refrigeration system 100, so that the air is mixed with the outside air flowing through the first-stage heat exchange core 30, thereby reducing the temperature of the outside air entering the second-stage heat exchange core 40, increasing the temperature difference between the outside air and the indoor air in the second-stage heat exchange core 40, ensuring the heat exchange efficiency of the outside air in the second-stage heat exchange core 40, and improving the heat dissipation effect of the second-stage heat exchange core 40. From this, this application composite refrigeration system 100 compares in current composite refrigeration system 100a, has higher whole heat dissipation and refrigeration efficiency, can provide better refrigeration effect for data center's computer lab 200, guarantees data center's steady operation.

It can be understood that, due to the heat dissipation requirement of the data center machine room 200, the composite refrigeration system 100 of the present application may further be provided with a multi-stage heat exchange core structure with more than two stages, so as to increase the flow rate of the indoor air in the indoor air duct 10 and improve the overall heat dissipation capability of the composite refrigeration system 100. For the composite refrigeration system 100 with the multi-stage heat exchange core structure, the structure of the first lateral air duct 50 can be further arranged between any two adjacent stages of heat exchange cores, so that the effect of mixing and cooling external air in the heat exchange process is achieved, and the overall heat dissipation capacity of the composite refrigeration system 100 is improved.

Through experimental verification, corresponding to the heat dissipation capacity of the existing composite refrigeration system 100a, the proportion of the external air entering the first lateral air duct 50 of the composite refrigeration system 100 accounts for 20% of the total amount of the external air flowing through the secondary heat exchange core 40, and the cooling effect of the composite refrigeration system 100 on the indoor air is improved by more than 6%. Increasing the amount of outside air entering the first lateral air duct 50 can further improve the heat dissipation effect of the compound refrigeration system 100.

In the illustration of fig. 2 and 3, the outdoor duct 20 includes an air inlet end 21 and an air outlet end 22 opposite to each other along the first direction 001. The external air enters the outdoor air duct 20 from the air inlet end 21 and flows out of the compound refrigeration system 100 from the air outlet end 22. In one embodiment, the compound refrigeration system is further provided with a blower unit 63. The blower unit 63 is disposed on the outdoor air duct 20, and is configured to drive the flow of the external air in the outdoor air duct 20, so as to increase the flow rate of the external air in the outdoor air duct 20, and ensure the heat exchange efficiency. The blower unit 63 may be disposed on the outdoor air duct 20 at the air inlet end 21, or between the air inlet end 21 and the air outlet end 22.

In the illustrated example, the blower unit 63 is disposed at the rear end of the air outlet end 22 along the first direction 001. Thus, the blowing unit 63 drives the external air into the outdoor air duct 20 from the air inlet end 21, and simultaneously drives the external air into the heat exchange area 110 from the first side to the air duct 50. It can be understood that when more external air enters the heat exchange area 110 from the first lateral air duct 50, and the external air is mixed with the external air flowing through the primary heat exchange core 30, the temperature of the external air is lower, so that the heat dissipation and cooling effect on the secondary heat exchange core 40 is better, and the overall heat dissipation capability of the compound refrigeration system 100 can be improved.

In one embodiment, the compound refrigeration system 100 further includes a first humidification unit 61. The first humidifying unit 61 is disposed between the air inlet end 21 of the external air duct 20 and the primary heat exchange core 30, and is configured to humidify the external air entering from the air inlet end 21, so as to improve the heat exchange efficiency of the external air in the primary heat exchange core 30. It can be understood that when the humidity in the outside air is higher, more heat can be taken away from the primary heat exchange core 30 during the heat exchange process, so as to form a better heat dissipation effect on the indoor air in the primary heat exchange core 30. In the illustrated schematic, the first humidifying unit 61 is implemented as a wet film.

In one embodiment, the compound refrigeration system 100 may further include a second humidification unit 62. The second humidifying unit 62 is disposed between the primary heat exchange core 30 and the secondary heat exchange core 40, and the second humidifying unit 62 is used for humidifying the external air flowing into the secondary heat exchange core 40, so as to improve the heat exchange efficiency of the external air in the secondary heat exchange core 40. The second humidifying unit 62 has similar effects to the first humidifying unit 61, and the second humidifying unit 62 may also be implemented in the form of a wet film. Further, in the illustrated schematic, the second humidification unit 62 may be further disposed between the first lateral air duct 50 and the second-stage heat exchange core 40, at this time, the second humidification unit 62 not only humidifies the external air flowing through the first-stage heat exchange core 30, but also humidifies the external air flowing into the heat exchange area 110 from the first lateral air duct 50, so that the external air flowing into the second-stage heat exchange core 40 all increases humidity at the second humidification unit 62, and further a better heat exchange effect is obtained in the second-stage heat exchange core 40.

It should be noted that the first humidification unit 61 and the second humidification unit 62 may be electrically connected to a controller (not shown) of the composite refrigeration system 100, and the controller controls the power of the first humidification unit 61 and the second humidification unit 62 to control the amount of humidification of the external air to each of the first humidification unit 61 and the second humidification unit 62. It is understood that, in some scenarios, when the indoor air temperature in the air intake section 21 is relatively low, the controller may also control the first humidification unit 61 and the second humidification unit 62 to be in a state of being stopped, and the external air may reach the preset heat dissipation requirement without being humidified. In other scenarios, the power of the first humidification unit 61 and the power of the second humidification unit 62 may be set differently, so as to control the overall heat dissipation effect of the outside air to the indoor air.

In one embodiment, the compound refrigeration system 100 further includes a refrigeration unit 64. The refrigeration unit 64 is a mechanical refrigeration system that includes an evaporator 641. The evaporator 641 is located in the indoor air duct 10, and the evaporator 641 is located at the rear end of the primary heat exchange core 30, the first lateral air duct 50, and the secondary heat exchange core 40 along the air circulation direction of the indoor air duct 10. That is, the evaporator 641 is disposed in the return air section 12 of the indoor air duct 10. The evaporator 641 may mechanically cool the indoor air flowing therethrough, and reduce the temperature of the indoor air by absorbing heat through evaporation.

The refrigeration unit 64 may also be electrically connected to and power controlled by the controller of the compound refrigeration system 100. Specifically, the controller of the compound refrigeration system 100 may also be electrically connected to a temperature sensor in the machine room 200, or the controller may be electrically connected to IT equipment in the machine room 200, and control the refrigeration efficiency of the refrigeration unit 64 based on the real-time temperature in the machine room 200 or based on the workload of the IT equipment in the machine room, so as to control the indoor temperature of the machine room 200 more accurately.

On the other hand, the evaporator 641 is disposed in the air return section 12, before the indoor air entering the air return section 12 is cooled at the evaporator 641, the indoor air has already completed heat exchange with the external air in the outdoor air duct 20, at this time, the temperature of the indoor air entering the air return section 12 is relatively low, the refrigeration unit 64 refrigerates the indoor air with relatively low temperature, the refrigeration capacity is controlled, and the overall energy consumption of the composite refrigeration system 100 is favorably reduced.

Referring to the embodiment of fig. 6, the compound refrigeration system 100 is further provided with a check valve 65. The stop valve 65 is respectively disposed at the first-stage heat exchange core 30 and the second-stage heat exchange core 40, and the stop valve 65 is used for controlling the flow of indoor air in the inner cavity of the corresponding heat exchange core. Specifically, the stop valve 65 may be electrically connected to a controller of the hybrid refrigeration system 100, and the controller may control the stop valve 65 respectively, so as to control the flow of the indoor air to the primary heat exchange core 30 and the secondary heat exchange core 40 respectively. In the foregoing, it is mentioned that there is a difference in heat exchange efficiency between the first-stage heat exchange core 30 and the second-stage heat exchange core 40, and when the overall flow of the indoor air is relatively small, the composite refrigeration system 100 of the present application can control the flow of the indoor air in the first-stage heat exchange core 30 to be greater than the flow of the indoor air in the second-stage heat exchange core 40, thereby ensuring that more indoor air flows through the first-stage heat exchange core 30 with a better heat exchange effect, and ensuring the overall heat exchange efficiency of the composite refrigeration system 100.

In one embodiment, the first lateral air duct 50 is further connected to the air intake section 11 and the air return section 12, the first lateral air duct 50 is further connected in parallel to the inner cavity of the primary heat exchange core 30 and the inner cavity of the secondary heat exchange core 40, and the first lateral air duct 50 is further configured as a part of the heat exchange section 13 of the indoor air duct 10. Therefore, the indoor air in the air intake section 11 can also flow through the first lateral air duct 50 to the air return section 12. Further, a first air valve 71 may be disposed between the first lateral air duct 50 and the air inlet section 11, and a second air valve 72 may be disposed between the first lateral air duct 50 and the air return section 12. The first air valve 71 and the second air valve 72 are also respectively connected to a controller of the compound refrigeration system 100, and the controller can control the flow rate of the indoor air in the first lateral air duct 50 through the control of the first air valve 71 and the second air valve 72. When the controller simultaneously controls the first air valve 71, the second air valve 72, the stop valve 65 disposed at the primary heat exchange core 30, and the stop valve 65 disposed at the secondary heat exchange core 40, the controller can also control the overall flow rate of the indoor air in the indoor air duct 10 and simultaneously perform flow rate distribution on the indoor air flowing through the heat exchange area 110.

Fig. 7 is a schematic view of an air path of the indoor air duct 10 in the compound refrigeration system 100. Because the first lateral air duct 50 is also connected to the outside of the compound refrigeration system 100, when the indoor air passes through the first lateral air duct 50, a part of the outside air also flows into the return air section 12 through the first lateral air duct 50. Since the total flow rate of the indoor air is kept constant, the part of the indoor air flowing into the first lateral duct 50 from the air intake section 11 flows out of the composite refrigeration system 100 from the first lateral duct 50. Thus, the composite refrigeration system 100 of the present application can also operate in a partial fresh air mode under the influence of the first lateral air duct 50 configured as part of the heat exchange section 13. That is, when the indoor air is controlled to flow through the first lateral air duct 50, a part of the outdoor air is exchanged with a part of the indoor air flowing into the first lateral air duct 50 by using the characteristic that the first lateral air duct 50 communicates with the outside, and the exchanged outdoor air is mixed with the remaining indoor air and then flows back to the data center room 200 through the return air section 12. At this time, part of the indoor air returned through the return air section 12 is the fresh air outside the composite refrigeration system 100, so that the effect of ventilating the data center machine room 200 is achieved.

In the development process of the foregoing embodiments, the compound refrigeration system 100 is in a heat dissipation and cooling operation mode. For the data center machine room 200, there may be a ventilation requirement during the operation process, so for the embodiment shown in fig. 6 and 7, the composite refrigeration system 100 of the present application may also work in a fresh air or partial fresh air mode to meet the working requirement of the data center machine room 200.

Referring to fig. 8, the first lateral air duct 50 is further provided with a filter assembly 51, and the filter assembly 51 is located at an end of the first lateral air duct 50 away from the heat exchange area 110 and is used for filtering outside air. Because in the fresh air mode, the newly supplemented outside air enters the indoor air duct 10 from the first lateral air duct 50. If the cleanliness of the outside air is not high, the indoor air is easily polluted, and the air quality in the data center machine room 200 is further influenced. Therefore, in order to ensure the cleanliness of the indoor air in the indoor air duct 10, the filter assembly 51 is disposed in the first lateral air duct 50, so as to provide a filtering and cleaning effect for the external air supplemented into the indoor air duct 10, and prevent the indoor air circulating in the indoor air duct 10 from being polluted.

In one embodiment, two stop-and-go valves 65 may be disposed at opposite ends of the outdoor air duct 20, i.e., the air inlet end 21 and the air outlet end 22, and the controller of the compound refrigeration system 100 controls the two stop-and-go valves 65 to control the air flow into the outdoor air duct 20. Since the outdoor air duct 20 is also connected to the heat exchanging region 110, and the first lateral air duct 50 is located inside the heat exchanging region 110, when the composite refrigeration system 100 of the present application operates in the fresh air mode, the outside air in the outdoor air duct 20 may also enter the return air section 12 through the first lateral air duct 50, thereby forming a part of the indoor air flowing back to the machine room 200. That is, in some embodiments, the fresh air is mixed in the first lateral air duct 50, and part of the fresh air is also from the outdoor air duct 20.

Generally, the outdoor air duct 20 is used for circulating a large amount of outside air when the composite refrigeration system 100 is in the cooling mode to perform heat exchange with indoor air. Therefore, if the filter assembly 51 is disposed at the outdoor air duct 20, the air flow rate to be filtered is too large, and it is not easy to control the cleanliness of the filtered air. Therefore, in the present embodiment, the stop-go valves 65 are respectively disposed at the air inlet end 21 and the air outlet end 22, so that when the composite refrigeration system 100 of the present application is in the fresh air mode, the two stop-go valves 65 are closed by the controller to block the communication between the outdoor air duct 20 and the outside air. At this time, the indoor air duct 10 can be communicated with the outside air only through the first lateral air duct 50, and the indoor air quality in the indoor air duct 10 can be ensured only by controlling the filtering effect of the filtering component 51 at the first lateral air duct 50, so that the overall air cleanliness in the machine room 200 is ensured.

Referring to fig. 9, a partition 53 is further disposed inside the first lateral air duct 50. The partition 53 is disposed perpendicular to the flow path of the indoor duct 10, and divides the first lateral duct 50 into a first air outlet area 501 and a first air inlet area 502. In the illustration of fig. 9, the flow path of the indoor air duct 10 at the first lateral air duct 50 is from top to bottom, so that the partition 53 is disposed in the horizontal direction and divides the first lateral air duct 50 into a first air outlet area 501 and a first air inlet area 502 which are opposite to each other in the up-down direction. It can be understood that the first air outlet section 501 is connected to the air inlet section 11 of the indoor air duct 10, and the first air inlet section 502 is connected to the air return section 12 of the indoor air duct 10. Due to the isolation effect of the partition 53 on the first air outlet area 501 and the first air inlet area 502, air cannot flow into the first air inlet area 502 from the first air outlet area 501.

Therefore, the indoor air extracted from the machine room 200 from the air inlet section 11 can only flow out of the compound refrigeration system 100 from the first lateral air duct 50 after entering the first air outlet area 501. The return air section 12, which requires the room air of the machine room 200 to be supplemented, can be taken out only from the first air inlet area 502. At this time, the first intake area 502 also needs to introduce external air from the outside of the compound refrigeration system 100. That is, the composite refrigeration system 100 of the present application can operate in a full fresh air mode under the influence of the partition 53. After the indoor air in the machine room 200 flows out through the air inlet section 11, all the indoor air is discharged out of the composite refrigeration system 100 in the first air outlet area 501; the air flowing into the machine room 200 at the return air section 12 comes from the outside area communicated with the first air inlet area 502. When the hybrid refrigeration system 100 operates in a fresh air mode, the air circulation rate in the data center room 200 is increased, thereby maintaining the quality of the indoor air.

It should be noted that, in the full-fresh-air mode, it is necessary to ensure that the indoor air of the air inlet section 11 completely flows into the first air outlet section 501, and the air of the air return section 12 completely enters from the first air inlet section 502. At this time, the controller also needs to close the stop valve 65 at the primary heat exchange core 30 and the secondary heat exchange core 40 at the same time, so as to prevent part of the indoor air from flowing into the return air section 12 from the inner cavity of the primary heat exchange core 30 or the secondary heat exchange core 40.

In one embodiment, the partition 53 may also be configured as a movable partition, such as a shutter with rotatable blades. The controller of the compound refrigeration system 100 can open or close the gap between the first air-out zone 501 and the first air-in zone 502 by controlling the rotation of the partition 53 (the blades in the louver) in the first lateral air duct 50, and allow the indoor air in the first air-out zone 501 to partially or completely enter the first air-in zone 502. Furthermore, the controller can control the rotation angle of the partition 53 to control the amount of the indoor air flowing from the first air outlet area 501 into the first air inlet area 502, and further control the ratio between the original indoor air and the fresh air in the air flowing into the air return section 12. In other embodiments, the partition plate 53 may further be provided with a structure such as an air valve capable of adjusting the flow rate, and the controller may adjust and control the flow rate of the air valve to achieve a beneficial effect similar to that of the movable partition plate.

Referring to fig. 10, the compound refrigeration system 100 of the present application further includes a second side air duct 80. The second lateral air duct 80 is located at the front end of the primary heat-exchange core 30 and between the air inlet end 21 of the outdoor air duct 20 and the primary heat-exchange core 30. The second lateral air duct 80 also extends in the second direction 002 and communicates to the outside of the compound refrigeration system 100. The second lateral air duct 80 can introduce the external air into the outdoor air duct 20, and further work together with the air inlet end 21, thereby expanding the air inlet area of the outdoor air duct 20.

Further, the second lateral air duct 80 is further respectively communicated with the air inlet section 11 and the air return section 12, so that the second lateral air duct 80 is further formed into a heat exchange section 13 structure of the indoor air duct 10. Specifically, the second lateral duct 80 and the first lateral duct 50 form a parallel structure, which are both configured as the heat exchange section 13 of the indoor duct 10, and can respectively perform the circulation function of the indoor air. In some embodiments, a third air valve 73 may be disposed between the second side air duct 80 and the air intake section 11, and a fourth air valve 74 may be disposed between the second side air duct 80 and the air return section 12. The third air valve 73 and the fourth air valve 74 are also respectively connected to a controller of the compound refrigeration system 100, and the controller can control the flow rate of the indoor air in the second side air duct 80 through controlling the third air valve 73 and the fourth air valve 74.

Therefore, when the controller simultaneously controls the first air valve 71, the second air valve 72, the third air valve 73, the fourth air valve 74, the stop valve 65 disposed at the primary heat exchange core 30, and the stop valve 65 disposed at the secondary heat exchange core 40, the overall flow rate of the indoor air in the indoor air duct 10 may be further controlled, and the indoor air flowing through the heat transfer area 110 may be simultaneously distributed. When the composite refrigeration system 100 needs to work in the fresh air mode, the effect of fresh air or part of fresh air can be realized by controlling the cooperation of the first lateral air duct 50 and the second lateral air duct 80, and the air flow of the indoor air duct 10 is increased.

For example, when the first lateral air duct 50 and the second lateral air duct 80 are both in the full ventilation mode, the composite refrigeration system 100 of the present application is in the full ventilation mode (see fig. 10), and the ventilation volume of the full ventilation is higher in this embodiment compared with the ventilation volume of the structure in which the first lateral air duct 50 is separately disposed; when the first lateral air duct 50 and the second lateral air duct 80 are both in the non-ventilation operation mode, the stop-and-go valve 65 corresponding to each of the primary heat exchange core 30 and the secondary heat exchange core 40 is opened, and the compound refrigeration system 100 of the present application is in the circulation refrigeration operation mode (see fig. 11). At this time, the indoor air can be cooled and cooled by working with the outdoor air duct 20 and/or the refrigeration unit 64; when the first/second lateral air ducts 50, 80 are in the full ventilation mode and the second/first lateral air ducts 80, 50 are in the non-ventilation mode, the ventilation of the hybrid refrigeration system 100 of the present application is approximately 50% (see fig. 12). And the ventilation volume of the compound refrigeration system 100 can be further adjusted by matching the control of the first air valve 71, the second air valve 72, the third air valve 73 and the fourth air valve 74 by the controller, so as to meet the use requirement of the data center machine room 200.

It is understood that the structure of the second lateral air duct 80 is similar to that of the first lateral air duct 50, and a structure such as the filter assembly 51 or the partition 53 may be disposed at the second lateral air duct 80. When the second lateral air duct 80 is provided with the filter assembly 51, air flowing into the second lateral air duct 80 can be cleaned and filtered; when the partition 53 is provided in the second lateral air duct 80, the air flow rate in the inner chamber of the second lateral air duct 80 can be controlled. Further, when the partition 53 is also set as a movable partition, or an air valve capable of adjusting the flow rate is arranged at the partition 53, so as to further adjust the ratio of the indoor air to the fresh air in the second lateral air duct 80, the air flow control accuracy of the composite refrigeration system 100 of the present application can be improved.

The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions, such as the reduction or addition of structural elements, the change of shape of structural elements, etc., within the technical scope of the present application, and shall be covered by the scope of the present application; the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.