Machine room air conditioner

Abstract

The utility model discloses a machine room air conditioner which comprises a compressor, a condenser and an evaporator liquid separation system. A flexible guide plate; the liquid outlet temperature of the evaporator is detected, one-to-one comparison is performed according to the calculation result of the processor, and the length specification of the liquid separation capillary tube of the evaporator is adjusted, so that liquid outlet of the evaporator is uniform, the heat exchange capacity is fully exerted, human intervention is not needed, and convenience and high efficiency are achieved. The temperature sensing bulbs are arranged at intervals, the flow path liquid distribution capillary tubes are independently controlled, mutual adjustment is achieved according to the average temperature, and the device can adapt to different working conditions and is rapid in execution and accurate in adjustment. The flexible flow guide plate is arranged at the sudden change or corner of the air duct, the flow guide plate can adjust the flow guide angle and direction according to the change of air speed and air pressure, flow guide air resistance and air speed uniformity are always kept in the optimal interval, and adaptability is high. Under the condition of variable working conditions and variable air volume, the guide plate is not influenced by changes, the mechanical structure is automatically adjusted, high efficiency and reliability are achieved, the action is rapid, lagging is short, and noise is low.

Description

Technical Field

[0001] The utility model relates to the technical field of computer room air conditioners, in particular to a computer room air conditioner. Background Art

[0002] As one of the four major components of an air conditioner, the heat exchanger directly exchanges heat with the medium. Its design directly impacts heat transfer efficiency. Compared to the outdoor unit, the evaporator is the component that comes into direct contact with the user space. Due to its size, weight, and placement limitations, optimizing the indoor heat exchanger is often more challenging than the outdoor unit. This is especially true for computer room air conditioners, where the outdoor unit is located in open areas and the indoor unit is installed in a room with strict space requirements.

[0003] After several product iterations and technological advancements, air conditioner heat exchanger technologies are now quite mature and have been proven in terms of form, heat transfer efficiency, and reliability. However, due to unavoidable limitations such as duct flow and structural layout, heat exchangers installed in air conditioners struggle to fully utilize their heat transfer capacity, especially in cooling-only computer room air conditioners equipped with multiple components such as humidification and heating. Flow field and layout optimization have reached a bottleneck. Common industry solutions to address the problem of uneven liquid distribution and temperature turbulence in heat exchangers include installing fan walls to improve inlet air uniformity, adding flow guides to reduce resistance losses, and fitting capillary tubes to the evaporator flow path to improve evaporator outlet temperature uniformity. However, these methods all have drawbacks: fan wall placement requires a large amount of space, is costly, and complicates unit control; conventional flow guides are fixed, resulting in suboptimal flow guidance under variable air volume and speed conditions; and capillary tube fitting requires multiple iterations for heat exchangers with complex flow paths and novel structures, making the process extremely complex and inefficient.

[0004] Therefore, it is necessary to develop a computer room air conditioner to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to design a computer room air conditioner in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] Computer room air conditioner, including:

[0008] Compressor, condenser; the output end of the compressor is connected to the input end of the condenser;

[0009] Evaporator liquid separation system; the evaporator liquid separation system is installed in the air duct of the machine room, the evaporator liquid separation system includes multiple liquid separation capillaries, multiple branches, a liquid separation head, an evaporator, an air collecting pipe, an air intake pipe, and a processor. The first end of the liquid separation head is connected to the output end of the condenser, the second end of the liquid separation head is respectively connected to the first ends of the multiple liquid separation capillaries, the second ends of the multiple liquid separation capillaries are connected to the first end of the air collecting pipe after passing through the evaporator, and the second end of the air collecting pipe is connected to the input end of the compressor. Each liquid separation capillary tube is connected in parallel with at least one branch, and a shut-off valve is provided in each branch and in the parallel section of the liquid separation capillary tube and the branch. At least one liquid separation capillary tube is provided with a temperature sensing package at the second end of the adjacent liquid separation capillaries; the signal output end of the temperature sensing package is connected to the signal input end of the processor, and the signal output end of the processor is respectively connected to the signal input ends of the multiple shut-off valves;

[0010] A flexible deflector for adjusting at least one of the angle and direction of the deflection; the flexible deflector is installed at a sudden change or corner of the air duct in the machine room.

[0011] Specifically, the flexible guide plate includes a guide plate, a bearing, a guide bracket, and a rotating shaft. The first end of the rotating shaft is fixedly installed on the inner wall of the air duct, the inner ring of the bearing is fixedly installed on the second end of the rotating shaft, a part of the guide bracket is fixedly connected to the outer ring of the bearing, and the guide plate is installed on the guide bracket.

[0012] Furthermore, the guide plate and the guide bracket are connected via a rubber block.

[0013] Preferably, the rubber block is formed into a ring shape, and the side walls of the rubber block are respectively connected to the guide plate and the guide bracket.

[0014] Furthermore, the guide plate is formed into an arc-shaped plate structure.

[0015] Furthermore, the guide bracket includes two sub-brackets, the first ends of the two sub-brackets are connected, the two sub-brackets are perpendicular to each other, and the connection between the two sub-brackets is fixedly connected to the outer ring of the bearing.

[0016] The beneficial effects of the present invention are:

[0017] The utility model detects the outlet temperature of the evaporator, performs a one-to-one comparison based on the calculation results of the processor, and adjusts the length specifications of the evaporator's liquid separation capillary (adjusts the opening and closing of the liquid separation capillary and the branch) to make the evaporator's liquid discharge uniform and give full play to the heat exchange capacity without human intervention, which is convenient and efficient.

[0018] The utility model has simple control, the temperature sensing packages are arranged at intervals, the flow path liquid separation capillaries are independently controlled, and they are adjusted to each other according to the average temperature. It can adapt to different working conditions, has rapid execution, and accurate adjustment.

[0019] The utility model arranges flexible guide plates at sudden changes or corners of the air duct. The guide plates can adjust the angle and direction of the diversion according to changes in wind speed and wind pressure, always keeping the diversion wind resistance and wind speed uniformity in the optimal range, and have strong adaptability.

[0020] In the case of variable working conditions and variable air volumes, the guide plate of the utility model is not affected by the changes, the mechanical structure is automatically adjusted, and the utility model is efficient and reliable, with rapid action, short lag, and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of this application;

[0022] Figure 2 Schematic diagram of the structure of the evaporator liquid separation system in this application;

[0023] Figure 3 This is a schematic structural diagram of the flexible guide plate in the present invention;

[0024] Figure 4 This is another structural schematic diagram of the air duct in the utility model.

[0025] The main corresponding reference numerals in the drawings are as follows:

[0026] In the figure: 1. Evaporator liquid separation system; 11. Liquid separation capillary; 12. Branch; 13. Stop valve; 14. Liquid separation head; 15. Evaporator; 16. Temperature sensing package; 17. Gas collecting pipe; 18. Intake pipe; 2. Flexible guide plate; 21. Guide plate; 22. Bearing; 23. Guide bracket; 24. Rubber block; 3. Air duct. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0031] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0032] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-4 As shown, the computer room air conditioner includes:

[0035] Compressor, condenser; the output end of the compressor is connected to the input end of the condenser;

[0036] Evaporator liquid separation system 1; The evaporator liquid separation system 1 is installed in the air duct 3 of the machine room. The evaporator liquid separation system 1 includes three liquid separation capillaries 11, three branches 12, a liquid separation head 14, an evaporator 15, a gas collecting pipe 17, an air intake pipe 18, and a processor. The first end of the liquid separation head 14 is connected to the output end of the condenser, and the second end of the liquid separation head 14 is respectively connected to the first end of the three liquid separation capillaries 11. The second ends of the three liquid separation capillaries 11 pass through the evaporator 15 and are connected to the first end of the gas collecting pipe 17. The second end of the air pipe 17 is connected to the input end of the compressor. A branch 12 is connected in parallel to each liquid separation capillary 11. A shut-off valve 13 is provided in each branch 12 and in the parallel section between the liquid separation capillary 11 and the branch 12. A temperature sensing package 16 (temperature sensor) is provided at the second end of each adjacent liquid separation capillary 11. The signal output end of the temperature sensing package 16 is connected to the signal input end of the processor, and the signal output end of the processor is respectively connected to the signal input ends of the multiple shut-off valves 13.

[0037] A flexible deflector 2 is provided for adjusting at least one of the angle and direction of the deflection; the flexible deflector 2 is installed at a sudden change or corner of the air duct 3 of the machine room.

[0038] In some embodiments, the flexible deflector 2 includes a deflector 21, a bearing 22, a deflector bracket 23, and a rotating shaft. The first end of the rotating shaft is fixedly mounted on the inner wall of the air duct 3. The inner ring of the bearing 22 is fixedly mounted on the second end of the rotating shaft. A portion of the deflector bracket 23 is fixedly connected to the outer ring of the bearing 22. The deflector 21 and the deflector bracket 23 are connected by a rubber block 24. The rubber block 24 is annular, with its sidewalls connected to the deflector 21 and the deflector bracket 23, respectively. The deflector 21 is formed into an arc-shaped plate-like structure. The annular rubber structure supports the deflector 21. When wind speed and pressure change, it provides a recoil force to the deflector 21, ensuring that it always maintains an appropriate angle for windward diversion. When the supply air passes through the corners of the air duct 3, the deflector 21 greatly improves the uniformity of the wind field after the change in direction, reduces pressure loss, and effectively improves the performance of the entire machine. After the evaporator 15 is automatically matched with the liquid separation capillary 11, the temperature field tends to be uniform and stable, and the evaporator 15 effectively exerts its heat exchange capacity. With the support of the two, for air-conditioning units with many flow field and flow channel components and long evaporator 15 flow paths, they can automatically correct and match the appropriate diversion angle and capillary length, which is efficient and convenient.

[0039] In some embodiments, the diversion bracket 23 includes two sub-brackets, the first ends of the two sub-brackets are connected, the two sub-brackets are perpendicular to each other, and the connection between the two sub-brackets is fixedly connected to the outer ring of the bearing 22.

[0040] In some embodiments, there are at least two flexible guide plates 2, and at least two flexible guide plates 2 are arranged on the same straight line. When the flexible guide plates 2 are arranged at the corners of the air duct 3, a straight line provided by at least two flexible guide plates 2 symmetrically divides the air duct 3, such as Figure 3 and 4 As shown, the flexible guide plate 2 is suitable for installation in an air duct 3 with a corner of 90° or greater than 90°.

[0041] In this application, a liquid separation capillary tube 11 separates the refrigerant; a shutoff valve 13 is mounted on the liquid separation capillary tube 11 to open and close the flow path and change the flow path; a temperature sensor 16 is mounted on the side of the gas collecting pipe 17 of the evaporator 15 to detect the outlet temperature of the evaporator 15. The flexible guide plate 2 can automatically adjust the diversion angle according to the wind pressure, wind speed, and installation position, reducing pressure loss in the air duct 3 and improving air supply uniformity.

[0042] In this application it is provided that:

[0043] 1. Ensure that at least one of the stop valves 13 between the branch line 12 and the main line of the dispensing capillary 11 is open;

[0044] 2. During the three processes of opening the stop valve 13 of the branch line 12 and closing the stop valve 13 of the dispensing capillary 11, opening both stop valves 13, and finally closing the stop valve 13 of the branch line 12 and opening the stop valve 13 of the main dispensing capillary 11, any change from one mode to another is called a capillary level upgrade. Mode changes are performed step by step and cannot be skipped.

[0045] 3. The opposite process of step 2 is called capillary downscaling, which is also carried out step by step.

[0046] In this application, temperature-sensing bulbs 16 are spaced apart at the outlet of the evaporator 15. The environments of two adjacent flow paths are considered identical (same outlet temperature and capillary length). This reduces the number of temperature-sensing bulbs 16, reduces costs, simplifies control, and minimizes the impact on the results. The temperature-sensing bulbs 16 detect the outlet temperature tn of each flow path, calculate the arithmetic average ta of all flow path outlet temperatures, and then calculate the difference between the outlet temperature and the average temperature, △tn = tn - ta. △tn is then compared with the set value △T (the recommended △T for conventional heat exchangers is 1-3°C):

[0047] When △tn>△T, it means that the outlet temperature of the flow path is higher than the average outlet temperature and higher than the set value. At this time, the amount of refrigerant is too small and the liquid separation capillary 11 is too long. The capillary needs to be shortened. At this time, the capillary of the flow path is operated at a lower level.

[0048] When △tn<-△T, it means that the outlet temperature of the flow path is lower than the average outlet temperature and lower than the set value. At this time, the amount of refrigerant is too much and the liquid separation capillary 11 is too short. The capillary needs to be extended. At this time, the capillary of the flow path is upgraded to operate at a higher level.

[0049] When -△T<△tn<△T, it means that although the outlet temperature fluctuates, it is within the set range. At this time, the outlet liquid temperature is relatively uniform, meeting the requirements, and the capillary operates according to the current state.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A computer room air conditioner comprising a compressor and a condenser, wherein the output end of the compressor is connected to the input end of the condenser; characterized in that: Computer room air conditioners also include: Evaporator liquid separation system; the evaporator liquid separation system is installed in the air duct of the machine room, the evaporator liquid separation system includes multiple liquid separation capillaries, multiple branches, a liquid separation head, an evaporator, an air collecting pipe, an air intake pipe, and a processor. The first end of the liquid separation head is connected to the output end of the condenser, the second end of the liquid separation head is respectively connected to the first ends of the multiple liquid separation capillaries, the second ends of the multiple liquid separation capillaries are connected to the first end of the air collecting pipe after passing through the evaporator, and the second end of the air collecting pipe is connected to the input end of the compressor. Each liquid separation capillary tube is connected in parallel with at least one branch, and a shut-off valve is provided in each branch and in the parallel section of the liquid separation capillary tube and the branch. At least one liquid separation capillary tube is provided with a temperature sensing package at the second end of the adjacent liquid separation capillaries; the signal output end of the temperature sensing package is connected to the signal input end of the processor, and the signal output end of the processor is respectively connected to the signal input ends of the multiple shut-off valves; A flexible deflector for adjusting at least one of the angle and direction of the deflection; the flexible deflector is installed at a sudden change or corner of the air duct in the machine room.

2. The computer room air conditioner according to claim 1, characterized in that: The flexible guide plate includes a guide plate, a bearing, a guide bracket, and a rotating shaft. The first end of the rotating shaft is fixedly installed on the inner wall of the air duct, the inner ring of the bearing is fixedly installed on the second end of the rotating shaft, a part of the guide bracket is fixedly connected to the outer ring of the bearing, and the guide plate is installed on the guide bracket.

3. The computer room air conditioner according to claim 2, characterized in that: The guide plate and the guide bracket are connected through a rubber block.

4. The computer room air conditioner according to claim 3, characterized in that: The rubber block is formed into a ring shape, and the side walls of the rubber block are respectively connected to the guide plate and the guide bracket.

5. The computer room air conditioner according to claim 2, characterized in that: The guide plate is formed into an arc-shaped plate structure.

6. The computer room air conditioner according to claim 2, characterized in that: The guide bracket includes two sub-brackets, the first ends of the two sub-brackets are connected, the two sub-brackets are perpendicular to each other, and the connection between the two sub-brackets is fixedly connected to the outer ring of the bearing.

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