Air volume control equipment for backboard air conditioner evaporator

Abstract

The utility model discloses air volume control equipment for an evaporator of a back plate air conditioner, which belongs to the technical field of data center cooling and comprises an evaporator, a fan, a controller and a differential thermocouple, the fan is arranged on the air outlet side of the evaporator from top to bottom, and the evaporator adopts a finned tube evaporator. The differential thermocouples are arranged on the surfaces of fins of the evaporator from top to bottom, the arrangement heights of the fans correspond to the arrangement heights of the differential thermocouples one to one, the input end of the controller is electrically connected with the differential thermocouples, and the output end of the controller is electrically connected with the fans. On the basis that the air volume requirement of the evaporator is met, the air inlet and outlet temperature difference of each height is monitored through the differential thermocouples, the air volume of the fan at the corresponding position is dynamically adjusted, the energy consumption of the fan can be reduced, and the purpose of saving energy is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to data center cooling technical field, concretely relates to a backboard air conditioner evaporator air volume control equipment. BACKGROUND

[0002] In recent years, with the rapid development of information technology such as artificial intelligence and big data, the number and scale of data centers, as the most important infrastructure in the digital economy era, are increasing year by year, and the corresponding energy consumption is also increasing. According to the forecast, global data center energy consumption will account for 4.5% of global total energy consumption in 2025, and will reach 8% in 2030. In data center energy consumption, the energy consumption of the cooling system accounts for a high proportion, about 40%. To reduce data center energy consumption, one important means is to reasonably, effectively and maximally utilize outdoor natural cold sources.

[0003] The separated heat pipe is a kind of high-efficiency heat transfer equipment using natural cold source, has the advantages of high energy efficiency ratio, long heat transfer distance, flexible arrangement, simple structure and the like, and is also called backboard air conditioner when applied to data room. The backboard air conditioner is arranged with multiple frequency conversion fans from top to bottom, and the air volume is controlled by using fan controller. The data center is not deployed with IT equipment when construction is completed, and will be gradually put on the shelf in batches after subsequent delivery for use. In the commercial operation of the data center, the arrangement of IT equipment in the cabinet needs to be adjusted according to the needs of customers. Therefore, in the actual data center room, partial load cabinets and subsequent local adjustment are generally present. When the natural cold source is used to provide cold quantity for the room, the power consumption of the backboard fan constitutes the main component of the energy consumption of the cooling system, so the air volume control of the backboard air conditioner evaporator under the condition of partial load of the cabinet has great significance for reducing the energy consumption of the fan and saving energy. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the technical problems mentioned in the background art, the utility model provides a backboard air conditioner evaporator air volume control equipment.

[0005] The utility model is realized through the following technical schemes.

[0006] A backboard air conditioner evaporator air volume control equipment, comprising an evaporator and a fan, the fan is arranged from top to bottom on the air outlet side of the evaporator, further comprising a controller and a differential thermocouple, the evaporator adopts a finned tube type evaporator, the differential thermocouple is arranged from top to bottom on the fin surface of the evaporator, the arrangement height of the fan corresponds to the arrangement height of the differential thermocouple, the input end of the controller is electrically connected with the differential thermocouple, and the output end is electrically connected with the fan.

[0007] Further, the differential thermocouple is horizontally arranged on the fin surface of the evaporator, and the length is the same as the fin width of the evaporator.

[0008] Further, the differential thermocouple surface is sequentially provided with an electric plate layer and a viscose layer to form a viscose strip, which is pasted on the fin surface of the evaporator.

[0009] Further, the electric plate layer uses a polyimide plate with a thickness of no more than 0.3 mm.

[0010] Further, the viscose strip has a thickness of no more than 0.5 mm.

[0011] Further, the differential thermocouple uses a T-type or K-type thermocouple.

[0012] Further, the controller adopts RS485 communication.

[0013] Further, the fan adopts an EC fan.

[0014] The utility model has the advantages of:

[0015] 1. The utility model satisfies the evaporator air volume demand, monitors the air temperature difference of each height through the differential thermocouple, dynamically adjusts the fan air volume of the corresponding position, can reduce the fan energy consumption, thereby achieves the energy-saving purpose.

[0016] 2. The viscose strip arranged on the fin surface of the evaporator is long strip-shaped, has small overall thickness and small area, does not affect the function of the evaporator, and the electric plate layer in the viscose strip can provide excellent mechanical strength and is not easy to break. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the control principle diagram of the utility model;

[0018] Figure 2 It is the viscose strip structure schematic view of the utility model;

[0019] Figure 3 It is the structure schematic view of backboard air conditioner;

[0020] Figure 4 It is Figure 3 It is the section schematic view of A-A direction;

[0021] Figure 5 It is the structure schematic view of cabinet.

[0022] In the drawing: evaporator 1, vertical column pipe 11, fin 12, controller 2, viscose strip 3, differential thermocouple 31, electric plate layer 32, viscose layer 33, fan 4, cabinet 5, load 6. DETAILED DESCRIPTION

[0023] The structure involved in the utility model and the technical terms used are further described below. These descriptions are merely used to illustrate how the utility model is implemented and cannot constitute any limitation on the utility model.

[0024] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "transverse", "longitudinal" and the like is based on the orientation or position relationship shown in the drawings, and is merely for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated position or element must have a specific orientation, constitute and operate in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are merely used for description purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection, can be direct connection, can also be indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] As shown in Figures 1-5 The utility model introduces a kind of backplate air conditioner evaporator air volume control equipment, including evaporator 1, controller 2, differential thermocouple 31 and fan 4, evaporator 1 uses finned tube evaporator, is made of vertical tube 11 and fin 12, fin 12 is sleeved on the outside of vertical tube 11, differential thermocouple 31 is arranged from top to bottom on the surface of fin 12, fan 4 is arranged from top to bottom on the air outlet side of evaporator 1, and the arrangement height of fan 4 corresponds to the arrangement height of differential thermocouple 31, controller 2 is arranged in control chamber, the input end of controller 2 is connected with differential thermocouple 31 by cable, and the output end is connected with fan 4 by cable, and the start-stop and speed of each fan 4 are automatically adjusted according to the real-time signal of differential thermocouple 31.

[0027] The heat exchange principle of evaporator 1 is that fin 12 is sleeved on the outside of vertical tube 11, working medium is filled in vertical tube 11, heat is transferred from high-temperature zone to low-temperature zone by circulating flow of working medium in tube, cold energy in vertical tube 11 is transmitted to fin 12 sleeved on the outside of vertical tube 11, and the cold energy of fin 12 is transmitted to hot air discharged by load 6 on the surface of fin 12 in the form of convection, so that the purpose of cooling air is achieved. Figures 3-4As shown in the drawings, each height of the fan 4 corresponds to a differential thermocouple 31, which is horizontally arranged on the surface of the fin 12 of the evaporator 1 and has the same length as the width of the fin 12, that is, the cold junction of the differential thermocouple 31 is close to the air inlet side to sense the inlet air temperature, and the hot junction is close to the air outlet side to sense the outlet air temperature. The controller 2 detects the differential thermocouple signal and controls the start-stop and speed of each fan 2 according to the inlet-outlet air temperature difference, so as to reduce the energy consumption of the fan under the partial load state of the cabinet, thereby achieving the purpose of saving energy.

[0028] As shown in the drawings, Figure 2 The surface of the differential thermocouple 31 is sequentially provided with an electric plate layer 32 and a glue layer 33 to form a sticky strip 3, which is pasted on the surface of the fin 12 of the evaporator. The differential thermocouple 31 uses a T-type or K-type thermocouple. The electric plate 32 layer uses a polyimide plate with a thickness of not greater than 0.3 mm, which can provide excellent mechanical strength and is not easy to break. The overall thickness of the sticky strip 3 containing the differential thermocouple layer 31, the electric plate layer 32 and the glue layer 33 is not greater than 0.5 mm. The sticky strip 3 is in a long strip shape and is horizontally pasted on the fin 12, which has a small area and does not affect the function of the evaporator 1.

[0029] The controller 2 adopts RS485 communication and can control the start-stop and speed of each fan 4.

[0030] The fan 4 adopts an EC fan, which can reduce the energy consumption of the fan compared with a traditional AC fan, thereby achieving the purpose of energy saving.

[0031] Figure 3 It is a structural schematic view of a back plate air conditioner, which comprises an evaporator 1 and a fan 4. The fan 4 is arranged from top to bottom on the air outlet side of the evaporator 1. Hot air from a load 6 passes through the evaporator 1 from the air inlet side, and the cooled air is discharged from the air outlet side. The fan 4 further dissipates heat.

[0032] Figure 5 It is a structural schematic view of a cabinet, which comprises a cabinet 5, a load 6, an evaporator 1 located at the back of the cabinet 5 and a fan 4. The load 6 is arranged on the cabinet 5, the evaporator 1 is located at the back of the cabinet 5, and the fan 4 is located on the other side of the evaporator 1. Hot air enters the evaporator 1 from the air inlet side, the evaporator 1 cools the hot air, and the cooled air is discharged from the air outlet side.

[0033] The working process of the utility model is as follows: when the fan 4 operates, the controller 2 detects the signal of the differential thermocouple 4, controls the corresponding fan 4 according to the inlet-outlet air temperature difference measured by the differential thermocouple 31 at different heights of the evaporator 1, and stops the operation of the fan 4 when the inlet-outlet air temperature difference Δt is less than 1℃, which indicates that the heat emitted by the load at this position is low. When 1℃≤Δt≤5℃, it indicates that the heat emitted by the load at this position is high, and the fan is linearly adjusted from the minimum speed to the maximum speed. When Δt≥5℃, the fan operates at the maximum speed.

[0034] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will still be able to make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A back draft air conditioner evaporator air volume control apparatus comprising an evaporator and a fan, said fan being arranged from top to bottom on the air outlet side of the evaporator, characterized in that: The controller and the differential thermocouple are also included, the evaporator adopts a finned tube evaporator, the differential thermocouples are arranged on the fin surface of the evaporator from top to bottom, the fan arrangement height corresponds to the differential thermocouple arrangement height, the input end of the controller is electrically connected with the differential thermocouple, and the output end is electrically connected with the fan.

2. The backdraft air conditioner evaporator air volume control device of claim 1 wherein: The differential thermocouple is horizontally arranged on the fin surface of the evaporator, and the length is the same as the fin width of the evaporator.

3. The backdraft air conditioner evaporator air volume control device of claim 1 wherein: The differential thermocouple surface is sequentially provided with an electric plate layer and a viscose layer to form a viscose strip, which is pasted on the fin surface of the evaporator.

4. The backdraft air conditioner evaporator air volume control device of claim 3 wherein: The electric plate layer uses a polyimide plate, and the thickness is not greater than 0.3 mm.

5. The backdraft air conditioner evaporator air volume control device of claim 4 wherein: The viscose strip has a thickness not greater than 0.5 mm.

6. The backdraft air conditioner evaporator air volume control device of claim 1 wherein: The differential thermocouple uses a T-type or K-type thermocouple.

7. The backdraft air conditioner evaporator airflow control device of claim 1, wherein: The controller adopts RS485 communication.

8. The backdraft air conditioner evaporator airflow control device of claim 1, wherein: The fan adopts an EC fan.

Images