Machine room layered temperature control system and temperature control method

Abstract

According to the machine room layered temperature control system and the temperature control method, a temperature layer is formed through multiple temperature detection points, the temperature change conditions of different heights of the machine room are detected, air is supplied through fresh air or an air conditioner, and the effect similar to air supply under a floor is formed, that is, the temperature of each layer from the floor of the machine room to the ceiling is gradually increased; and the relative temperature average of each temperature layer is ensured through the temperature difference of each layer, the temperature layering of the machine room is finally realized, the cold mixing is reduced, the refrigeration efficiency is improved, and the equipment can be arranged according to the temperature characteristics of each layer.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control of a computer room, and in particular to a layered temperature control system and a temperature control method for a computer room. Background Art

[0002] In the existing technical solutions, the heat dissipation of the computer room is completed by refrigeration equipment such as computer room air conditioners or fresh air. Among them, computer room air conditioners are mostly supplied from the top or ceiling, and the air is returned from the side or rear of the air conditioner; the down-supply air conditioner and under-floor air supply mode are supplied from the bottom and returned from the top. However, the existing technical solutions have the following disadvantages: Since the hot air flow in the computer room is mainly concentrated in the upper part, the cold air of the upper air-supply air conditioner is sent out from the upper part of the air conditioner, directly mixing with the hot air in the computer room, reducing the cooling efficiency and causing chaotic airflow organization. The air supply outlet of the computer room fresh air system is mostly located in the lower part of the computer room, and the air exhaust outlet is located in the upper part of the computer room, but its control mode is still the traditional room-level temperature control, which starts and stops the inlet and outlet air according to the room temperature, and the temperature control accuracy of the computer room is poor. The existing computer room bottom air-supply air conditioner, although the air supply form is more conducive to temperature stratification, does not monitor the temperature of each floor of the computer room in actual control, but only performs point temperature control. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a stratified temperature control system and a temperature control method for a computer room.

[0004] The present invention provides a layered temperature control system for a machine room, the system comprising: A fresh air system, the fresh air system comprising an air intake component and an air exhaust component, the air intake component and the air exhaust component are arranged in the machine room; At least one computer room air conditioner, arranged in the computer room; In the direction from the floor of the machine room to the roof of the machine room, the internal space of the machine room forms at least two temperature layers, and at least one temperature sensor is arranged in each of the temperature layers; The controller is used to receive the device temperature detected by each of the temperature sensors, and based on the device temperature, control the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer.

[0005] Optionally, a plurality of temperature sensors are provided in the temperature layer, and the plurality of temperature sensors are located at different horizontal planes in the temperature layer.

[0006] Optionally, the system further comprises: The humidity sensor is used to detect the humidity at the air inlet and outlet of the fresh air system and send the humidity to the controller.

[0007] The present invention also provides a temperature control method based on the above-mentioned stratified temperature control system for a computer room, the method comprising: The controller receives the equipment temperature detected by each of the temperature sensors, and based on the equipment temperature, controls the fresh air system and / or the computer room air conditioner to supply air to a target temperature layer so that the temperature of the internal space of the computer room gradually increases from the floor to the roof of the computer room.

[0008] Optionally, controlling the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer specifically includes: When the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, the controller controls the fresh air system and / or the computer room air conditioner to supply air to a target temperature layer, where the target temperature layer is a first temperature layer adjacent to the floor of the computer room; When the device temperature is higher than the device temperature threshold and the ratio of the device temperature to the device temperature threshold is greater than a first preset value, the controller controls the fresh air system and / or the computer room air conditioner to turn on the maximum air volume and supply air to the target temperature layer, which is the temperature layer with the highest temperature.

[0009] Optionally, when the device temperature is higher than a device temperature threshold and the ratio of the device temperature to the device temperature threshold is less than a first preset value, the controller controls the fresh air system and / or the computer room air conditioner to supply air to a target temperature layer, specifically including: When the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, if a first condition is met, the fresh air system is controlled to supply air to the target temperature layer; When the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, if the first condition is not met, controlling the computer room air conditioner to supply air to the target temperature layer; The first condition includes that the fresh air temperature of the fresh air system is less than the air inlet temperature threshold and the fresh air humidity is within a preset range.

[0010] Optionally, the method further comprises: The controller receives the humidity of the air inlet and the air outlet detected by the humidity sensor.

[0011] Optionally, controlling the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer specifically includes: When the difference between the maximum temperatures corresponding to two adjacent temperature layers is greater than the temperature difference threshold, the controller controls the fresh air system and / or the computer room air conditioner to adjust the air supply angle and air supply speed to supply air to the target temperature layer, which is the upper temperature layer between the two adjacent temperature layers.

[0012] Optionally, controlling the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer specifically includes: When the temperature variance of multiple device temperatures detected at the target temperature layer is greater than the variance threshold, the controller controls the fresh air system and / or the computer room air conditioner to adjust the air supply height and air supply angle to supply air to the target temperature layer.

[0013] Optionally, the method further comprises: When the pressure difference between the inlet and outlet of the fresh air system is not within a normal pressure difference range, the controller controls the inlet and outlet wind speeds of the fresh air system.

[0014] The computer room stratified temperature control system and temperature control method provided by the present invention form temperature layers through multiple temperature detection points, detect temperature changes at different heights in the computer room, and form an effect similar to under-floor air supply through fresh air or air conditioning, that is, the temperature of each layer gradually increases from the floor to the ceiling of the computer room, and the relative temperature of each temperature layer is guaranteed to be average through the temperature difference of each layer, finally realizing temperature stratification in the computer room, reducing cold mixing, improving refrigeration efficiency, and being able to layout equipment according to the temperature characteristics of each layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of a cross-sectional top view at a certain height of a machine room provided in an embodiment of the present invention.

[0017] Figure 2 A front view cross-sectional schematic diagram of a machine room provided in an embodiment of the present invention.

[0018] Figure 3 A flow chart of a temperature control method for a computer room stratified temperature control system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The main temperature control solution for existing computer rooms is the underfloor air-supply air conditioning system. The underfloor air-supply air conditioning achieves equipment cooling by directly sending cold air to the air inlet side of the equipment in the cabinet, or sending cold air to the cold channel in front of the cabinet. Its main controlled temperature is the overall temperature of the cold channel. In addition, this solution requires closed cabinets or physically separated cold channels to control the cold air and reduce the mixing of cold and hot air flows. For example, in practice, the floor height of a computer room is 2.5 meters or even higher. Since the height of a computer room cabinet is 2.2 meters or less, the actual space for equipment is only the part below 2.2 meters. Due to the loading method of the equipment in the cabinet, the actual installation position of the heating equipment may be lower, and some equipment is designed with bottom air inlet and top air outlet. Therefore, in practice, the environment that needs to be cooled is only the part below 2.2 meters or even lower. In order to dissipate heat more efficiently and energy-efficiently, the embodiments of the present invention combine the characteristics of the computer room equipment and utilize a fresh air system combined with a mechanical refrigeration system to achieve stratified temperature control in the computer room. The main feature is to utilize the different air densities at different temperatures (as shown in Table 1), so that the temperature of the computer room gradually increases from the floor to the ceiling in layers, reducing the mixing of cold and hot air flows, improving the refrigeration efficiency of the computer room, and achieving energy conservation and emission reduction.

[0021] Table 1

[0022] Figure 1 A schematic diagram of a cross-sectional view of a machine room at a certain height provided by an embodiment of the present invention, Figure 2 A schematic diagram of a front cross-section of a machine room provided in an embodiment of the present invention is shown in FIG. Figure 1 and Figure 2 As shown, the layered temperature control system for a computer room provided in an embodiment of the present invention includes a fresh air system, and the fresh air system includes an air intake component 101 and an air exhaust component 102, and the air intake component 101 and the air exhaust component 102 are arranged in the computer room. At least one computer room air conditioner 301, 302 is arranged in the computer room. An equipment cabinet 2 is arranged in the interior space of the computer room. From the floor of the computer room to the roof of the computer room, the interior space of the computer room forms at least two temperature layers, and each of the temperature layers is provided with at least one temperature sensor 4 (the "▪" in the figure are all temperature sensors). As shown Figure 3 As shown, from the floor of the machine room to the roof of the machine room, the internal space of the machine room forms four temperature layers, namely the first temperature layer L1 layer, the first temperature layer L2 layer, the first temperature layer L3 layer and the first temperature layer L4 layer, and multiple temperature sensors are set in each temperature layer. Specifically, as Figure 3 The temperature sensors 407 , 408 , 409 shown in the figure define the L1 layer, the temperature sensors 410 , 411 , 412 define the L2 layer, the temperature sensors 401 , 402 , 403 , 404 define the L3 layer, and the temperature sensors 405 , 406 define the L4 layer.

[0023] The computer room stratified temperature control system provided in an embodiment of the present invention also includes a controller (not shown in the figure), which is used to receive the equipment temperature detected by each of the temperature sensors, and based on the equipment temperature, control the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer.

[0024] The computer room may include a computer room maintenance structure, a computer room air conditioner, a computer room fresh air system, a computer room equipment cabinet, a temperature and humidity sensor, an electric meter box, an equipment power detector, a computer room air conditioner-fresh air communication system, etc. The air intake component includes a filter system, a fan system, a temperature and humidity detection system, and a pressure detection system, and the exhaust component includes a fan system, a temperature and humidity detection system, and a pressure detection system. The equipment cabinet contains equipment and a temperature sensor. The fresh air system is powered by DC, and the computer room air conditioner is powered by AC.

[0025] In the layered temperature control system for a computer room provided in an embodiment of the present invention, multiple temperature sensors may be provided in each temperature layer. In order to better detect the temperature in the temperature layer, the multiple temperature sensors may be located at different horizontal planes in the temperature layer. Of course, multiple temperature sensors may also be provided at the same horizontal plane in the temperature layer.

[0026] Furthermore, the computer room stratified temperature control system provided in the embodiment of the present invention may also include a humidity sensor for detecting the humidity of the air inlet and the air outlet of the fresh air system and sending the humidity to the controller.

[0027] The temperature sensors and humidity sensors in each temperature layer send the detected temperature and humidity information to the controller. Based on the received temperature and humidity information and the preset relevant thresholds, the controller controls the fresh air system alone or the computer room air conditioner alone to supply air to the target temperature layer, or controls the fresh air system and the computer room air conditioner to work together at the same time. The target temperature layer can be any one of the multiple temperature layers, which is determined based on the current temperature of each temperature layer.

[0028] The layering method in the embodiment of the present invention can combine different temperature control points into temperature layers, and can arbitrarily combine a certain number of temperature control points to form temperature layers of different heights.

[0029] The computer room stratified temperature control system provided by the present invention forms temperature layers through multiple temperature detection points, detects temperature changes at different heights of the computer room, and forms an effect similar to under-floor air supply through fresh air or air conditioning, that is, the temperature of each layer gradually increases from the floor to the ceiling of the computer room, and the relative temperature of each temperature layer is ensured to be average through the temperature difference of each layer, ultimately achieving temperature stratification in the computer room, reducing cold mixing, improving refrigeration efficiency, and allowing the layout of equipment according to the temperature characteristics of each layer.

[0030] Based on the above embodiments, the present invention provides a hierarchical temperature control system for a computer room. Specifically, the temperature control method of the system will be introduced, which can be applied to the temperature regulation of the computer room. Specifically, the controller receives the device temperatures detected by each of the temperature sensors, and based on the device temperatures, controls the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer, so as to achieve that the temperature of the internal space of the computer room gradually increases from the floor of the computer room to the roof of the computer room.

[0031] In the embodiments, the computer room, computer room equipment, layout of computer room equipment cabinets, number of computer room air conditioners, and number of fresh air systems in the computer room are only an application illustration of the method of the embodiments of the present invention, and are not limited to the situation of the embodiments.

[0032] Before introducing the control method, some parameters need to be defined first: According to the computer room being divided into n layers (L1, L2, L3....Ln respectively), Tn is the highest temperature of a certain height layer in the computer room (according to the number of layers, it can be T1, T2, T3, T4....Tn). Tn-x is the temperature of a certain temperature detection point in a certain height layer of the computer room (according to the number of detection points, it can be T1-1, T1-2....T1-x). The temperature difference threshold between different temperature layers is △T1, the temperature variance of different temperature layers is En, and the variance threshold is Es. The fresh air temperature is Tin, the fresh air humidity is Din, the exhaust air temperature is Tout, the exhaust air humidity is Dout, and the fresh air opening temperature difference is △Twc. The fresh air inlet pressure is Pin, the fresh air outlet pressure is Pout, the pressure difference between the inlet and outlet of the fresh air system is △P, and the normal pressure difference range is (P0, Pmax). The temperature coefficient is α (α>1), the temperature threshold of the computer room equipment inlet is Tsj0, the equipment temperature is Tsc, and the equipment temperature threshold is Tsc0.

[0033] The embodiments of the present invention introduce the temperature control method by dividing it into several working modes.

[0034] I. Normal operation mode

[0035] When the device temperature Tsc is higher than the device temperature threshold Tsc0 and the ratio of Tsc / Tsc0 is less than α (the first preset value), that is, in the case of non-overheating (emergency), the controller controls the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer. At this time, the target temperature layer is the L1 layer. Specifically, the computer room air conditioner supplies air for cooling to the L1 layer. After continuous cooling, the cooling capacity of the air conditioner is gradually reduced from near the computer room floor to the ceiling, and the temperature gradually increases from the lowest at the bottom to the ceiling. The temperature layer variance En of each layer <Es, and the temperature fluctuation is small.

[0036] In the normal operation mode, further, when the controller receives the humidity of the air inlet and the air outlet detected by the humidity sensor, when the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, if the first condition is met, the fresh air system is controlled to supply air to the target temperature layer; if the first condition is not met, the computer room air conditioner is controlled to supply air to the target temperature layer. The first condition includes that the fresh air temperature of the fresh air system is less than the air inlet temperature threshold, and the fresh air humidity is within a preset range.

[0037] 2. Emergency Situation Mode

[0038] When the device temperature Tsc is higher than the device temperature threshold Tsc0, and the ratio of Tsc / Tsc0 is greater than α (the first preset value), the controller controls the fresh air system and / or the computer room air conditioner to turn on the maximum air volume and supply air to the target temperature layer, which is the temperature layer with the highest temperature. Specifically, the above situation indicates that the computer room equipment is extremely overheated at this time, and there may be extreme situations, such as power outage, air conditioner compressor failure, fan damage, etc., and the emergency mode needs to be activated. At this time, the computer room fresh air system communicates with the computer room air conditioner to determine the refrigeration equipment that can be turned on, and the air conditioner is turned on first and the maximum air volume is enabled. If the air conditioner cannot be enabled or cannot cool down, the fresh air is turned on and the maximum air volume is enabled, and the air supply angle is adjusted to give priority to cooling down the extremely overheated area. After the emergency mode ends, the system returns to the "normal operation mode".

[0039] 3. The temperature difference between adjacent layers is too large

[0040] When the difference between the maximum temperatures corresponding to two adjacent temperature layers is greater than the temperature difference threshold, the controller controls the fresh air system and / or the computer room air conditioner to adjust the air supply angle and air supply speed to supply air to the target temperature layer, which is the upper temperature layer between the two adjacent temperature layers.

[0041] Specifically, taking the L3 and L2 layers as examples, set the temperature difference threshold △T1 for each layer. When the difference between the highest temperature T3 of the L3 layer (assuming the temperature of the 403 detection point) and the highest temperature T2 of the L2 layer (assuming the temperature of the 410 detection point) is greater than △T1, it means that the temperature T3 of the L3 layer is high and there may be a risk of overheating. It is necessary to adjust the air conditioning supply to intervene in the temperature of the excessively high temperature layer. At this time, the air supply angle of the air conditioner or fan is aimed at the L3 layer, and the minimum air supply speed is adjusted according to the height. The air supply angle is changed from near to far, and the fan speed gradually increases from near to far. It is judged again whether the difference between the highest temperature T3 of the L3 layer and the highest temperature T2 of the L2 layer is less than △T1.

[0042] 4. The temperature fluctuation of a single temperature layer is large

[0043] When the temperature variance of multiple device temperatures detected at the target temperature layer is greater than the variance threshold, the controller controls the fresh air system and / or the computer room air conditioner to adjust the air supply height and air supply angle to supply air to the target temperature layer.

[0044] Specifically, when the temperature difference between adjacent layers is less than the set temperature difference threshold △T1, it is necessary to judge the temperature uniformity of a single layer, and set the temperature variance to Es. By detecting the temperatures of each monitoring point T401, T402, T403, T404... of the L3 layer, the temperature variance of the L3 layer is calculated to be E3. In this embodiment, it is assumed that E3>Es, indicating that the temperature uniformity of the L3 layer is poor and there is a large fluctuation. At this time, the height of the air supply port is adjusted and the air supply angle is changed to sweep and blow the L3 layer.

[0045] Figure 3 A flow chart of the temperature control method of the layered temperature control system of the computer room provided in an embodiment of the present invention. According to the characteristics of the computer room, the embodiment of the present invention defines the height layer where several temperature sensors distributed in the space upward from the floor of the computer room are located as the L1 layer. The temperatures of the temperature monitoring points in this layer are T1-1, T1-2...T1-x, the maximum temperature is T1, and the temperature variance is E1. In the space upward from the L1 layer, the L2 to Ln layers are determined in sequence according to the above method. The temperatures of the temperature monitoring points on each layer are T2-1, T2-2...T2-x to Tn-1, Tn-2...Tn-x, and the maximum temperature of each layer is from T2 to Tn, and the temperature variance is from E2 to En. Figure 3 As shown, the method includes: ① Detect the equipment temperature Tsc in the computer room, the temperature of each temperature control point in the computer room, and the temperature and humidity at the air inlet of the fresh air system, and determine whether the equipment temperature Tsc is greater than or equal to the equipment temperature threshold Tsc0. If it is, it means that the equipment temperature is high, and it is necessary to further determine the degree of overheating of the equipment and proceed to step ②; if not, it means that the equipment temperature is normal, and the air conditioner and fresh air remain on standby.

[0046] ② Determine whether Tsc / Tsc0 is greater than α. If so, it means the device is extremely overheated, and proceed to step ③; if not, it means the device temperature is within the set temperature control range, and proceed to step ④.

[0047] ③ Due to extreme overheating of the equipment, emergency cooling may be required. At this time, the communication between the fresh air system and the air conditioner in the computer room is used to determine the refrigeration equipment that can be turned on, and the air conditioner is turned on first and the maximum air volume is enabled. If the air conditioner cannot be enabled or cannot cool down, the fresh air is turned on and the maximum air volume is enabled, and the air supply angle is adjusted to cool down the heating area. The emergency situations include but are not limited to power outages, refrigeration system failures, fresh air system failures, and other situations that affect the cooling of the computer room.

[0048] ④ Determine whether the fresh air temperature and humidity meet the conditions of Tsj0 - Tin > △Twc and Din ∈ (D1, D2). If so, it indicates that the fresh air opening condition is met at this time, and the fresh air system is turned on; if not, it means that the fresh air temperature and humidity do not meet the requirements of the computer room heat dissipation, and the computer room air conditioner is turned on. Keep the air supply direction on the L1 layer. At this time, the lower air temperature near the floor of the computer room is mainly lowered by air supply. Using the principle that the density of air at different temperatures is different, a natural temperature stratification is formed in the computer room. Proceed to step ⑤.

[0049] ⑤ Judge whether the temperature difference between adjacent layers in the computer room meets the condition of T(n + 1) - Tn < △T1. If so, it means that from the L1 layer to the Ln layer, the temperature difference gradually increases and is less than △T1, forming a hierarchical control of the computer room temperature. The cold and hot air flow organization in the computer room is good, there is no mixing, the cooling efficiency is high, and the air conditioner energy consumption can be saved to the greatest extent. Proceed to step ⑥; if not, it means that the temperature difference between certain adjacent layers is too large, the natural temperature stratification effect is poor, and there is a risk of overheating. At this time, detect the adjacent Ln and L(n + 1) layers with a large temperature difference, adjust the height or angle of the air supply outlet, go to the L(n + 1) layer with a large temperature difference, adjust the minimum air supply speed according to the floor height, change the angle of air supply from near to far, and gradually increase the fan speed from near to far to cool the high-temperature area, and then perform step ⑤ again to judge.

[0050] ⑥ Judge whether the temperature variance of each temperature layer meets the condition of En < Es. If so, it means that the temperature stratification in the computer room is good and the temperature of each layer is relatively uniform, reaching a stable situation of hierarchical temperature control, that is, the temperature gradually increases from the L1 layer to the Ln layer, and the temperature of each temperature layer is similar. Proceed to step ⑦. If not, it means that the temperature of a certain layer Ln fluctuates greatly. Adjust the height of the air supply outlet, change the air supply angle to blow on this layer, and then perform step ⑥ again to judge.

[0051] ⑦ Judge whether the pressure difference between the fresh air inlet and outlet meets the condition of △P ∈ (P0, Pmax). If so, it means that the pressure difference in the computer room is within the normal range. If not, adjust the rotation speed of the fresh air inlet and outlet fans of the fresh air system. If the pressure difference exceeds Pmax, increase the rotation speed of the exhaust fan to reduce the pressure difference; if the pressure difference is less than P0, increase the rotation speed of the fresh air inlet fan to increase the pressure difference.

[0052] In the method provided by the embodiment of the present invention, a conventional temperature stratification distribution can be realized, that is, the temperature stratification distribution of the computer room temperature from the lowest plane to the highest plane of the computer room, which is the lowest plane temperature in turn, and gradually increases to the highest plane temperature; it can also realize the regulation of the temperature of a certain layer. When the temperature of the Ln layer does not meet the set temperature requirement, the temperature of a certain layer can be adjusted by adjusting the air supply angle and time, realizing the hierarchical temperature control.

[0053] The method provided in the embodiment of the present invention is based on the different air densities at different temperatures. By adjusting the fresh air or the lower air supply of the air conditioning system, a stratified state with rising temperature from low to high is formed, the mixing of cold and hot air flows is reduced, and efficient cooling of the computer room is achieved. The temperature difference control method of adjacent layers is used to determine the potential overheating hazard layer, and the hidden danger is eliminated by adjusting the air supply angle and air supply speed, and the temperature stratification state is maintained. The temperature variance of all temperature control points on each layer is judged, and the air is supplied by coordinating the height, air supply angle and fan speed of the air supply port to achieve relative uniformity of temperature on each layer, reduce the mixing of cold and hot air flows in the computer room, and stabilize the temperature stratification of the computer room.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A layered temperature control system for a machine room, characterized in that: The system comprises: A fresh air system, the fresh air system comprising an air intake component and an air exhaust component, the air intake component and the air exhaust component are arranged in the machine room; At least one computer room air conditioner, arranged in the computer room; In the direction from the floor of the machine room to the roof of the machine room, the internal space of the machine room forms at least two temperature layers, and at least one temperature sensor is arranged in each of the temperature layers; The controller is used to receive the device temperature detected by each of the temperature sensors, and based on the device temperature, control the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer.

2. The computer room layered temperature control system according to claim 1, characterized in that: A plurality of temperature sensors are arranged in the temperature layer, and the plurality of temperature sensors are located at different horizontal planes in the temperature layer.

3. The computer room layered temperature control system according to claim 1 or 2, characterized in that: The system further comprises: The humidity sensor is used to detect the humidity of the air inlet and outlet of the fresh air system and send the humidity to the controller.

4. A temperature control method based on the layered temperature control system of a computer room according to any one of claims 1 to 3, characterized in that: The method comprises: The controller receives the equipment temperature detected by each of the temperature sensors, and based on the equipment temperature, controls the fresh air system and / or the computer room air conditioner to supply air to a target temperature layer so that the temperature of the internal space of the computer room gradually increases from the floor to the roof of the computer room.

5. The temperature control method according to claim 4, characterized in that: The controlling the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer specifically includes: When the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, the controller controls the fresh air system and / or the computer room air conditioner to supply air to a target temperature layer, where the target temperature layer is a first temperature layer adjacent to the floor of the computer room; When the device temperature is higher than the device temperature threshold and the ratio of the device temperature to the device temperature threshold is greater than a first preset value, the controller controls the fresh air system and / or the computer room air conditioner to turn on the maximum air volume and supply air to the target temperature layer, which is the temperature layer with the highest temperature.

6. The temperature control method according to claim 5, characterized in that: The method, when the device temperature is higher than the device temperature threshold and the ratio of the device temperature to the device temperature threshold is less than a first preset value, controls the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer, specifically comprising: When the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, if a first condition is met, the fresh air system is controlled to supply air to the target temperature layer; When the device temperature is higher than the device temperature threshold, and the ratio of the device temperature to the device temperature threshold is less than a first preset value, if the first condition is not met, controlling the computer room air conditioner to supply air to the target temperature layer; The first condition includes that the fresh air temperature of the fresh air system is less than the air inlet temperature threshold and the fresh air humidity is within a preset range.

7. The temperature control method according to claim 6, characterized in that: The method further comprises: The controller receives the humidity of the air inlet and the air outlet detected by the humidity sensor.

8. The temperature control method according to claim 4, characterized in that: The controlling the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer specifically includes: When the difference between the maximum temperatures corresponding to two adjacent temperature layers is greater than the temperature difference threshold, the controller controls the fresh air system and / or the computer room air conditioner to adjust the air supply angle and air supply speed to supply air to the target temperature layer, which is the upper temperature layer between the two adjacent temperature layers.

9. The temperature control method according to claim 4, characterized in that: The controlling the fresh air system and / or the computer room air conditioner to supply air to the target temperature layer specifically includes: When the temperature variance of multiple device temperatures detected at the target temperature layer is greater than the variance threshold, the controller controls the fresh air system and / or the computer room air conditioner to adjust the air supply height and air supply angle to supply air to the target temperature layer.

10. The temperature control method according to claim 4, characterized in that: The method further comprises: When the pressure difference between the inlet and outlet of the fresh air system is not within a normal pressure difference range, the controller controls the inlet and outlet wind speeds of the fresh air system.

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