Machine room air conditioner
By introducing flash economy and throttle valves into the refrigeration system of the machine room air conditioner, the problem of poor liquid separation stability in the traditional machine room air conditioner is solved, and the heat exchange efficiency of the evaporator is significantly improved.
Patent Information
- Application Number
- CN202311332484.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-13
- Publication Date
- 2025-04-15
AI Technical Summary
In traditional machine room air conditioners, the liquid separation stability of the evaporator is poor, resulting in a decrease in overall heat exchange efficiency.
The refrigeration system is adopted that includes a compressor, condenser, electronic expansion valve, flash economy and evaporator. Through the inlet pipe group and liquid discharging pipe, the flash economy is used to separate gas and liquid liquid to ensure that pure liquid refrigerant enters the evaporator and prevent flash gas from entering the throttle valve.
The liquid separation uniformity and overall heat exchange efficiency of the evaporator are improved, and the appropriate refrigerant flow distribution of each evaporator flow path is achieved by adjusting the aperture specifications of the throttle valve core.
Smart Images
Figure CN119835901A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a computer room air conditioner. Background Art
[0002] Since the heat generated in the communication room is relatively high, the temperature has a great impact on the electronic components, insulation materials and recording media of the computer room equipment. Therefore, it is usually necessary to control the room temperature and relative humidity within the set range through the room air conditioner to improve the life and reliability of the equipment.
[0003] Traditional air-cooled room air conditioners usually include two evaporators on the left and right, which are arranged in an A-shape or a V-shape. The throttled refrigerant usually enters the evaporator through two sets of liquid inlet pipes. To ensure uniform liquid distribution between the two evaporators, the liquid inlet pipe set of the evaporator usually includes a brass distributor, multiple diversion pipes and distributor connecting pipes.
[0004] In the relevant computer room air conditioner, as the number of shunt pipes in the liquid inlet pipe group of the evaporator increases, the liquid separation stability inside the evaporator becomes worse, which is referred to as the poor shunt effect one; for the polarity of only using one electronic expansion valve for throttling, the refrigerant of the left and right evaporators must be distributed through a three-way pipe after throttling, which makes the liquid separation stability inside the evaporator also worse, which is referred to as the poor shunt effect two. According to the reliability calculation principle, the overall shunt effect of the system is the product of the poor shunt effect one and the poor shunt effect two. The overall liquid separation effect will become worse, affecting the overall heat exchange efficiency of the evaporator. Summary of the invention
[0005] The object of the present invention is to provide a computer room air conditioner to optimize the structure of the computer room air conditioner in the related art, improve the flow diversion stability of the evaporator, and improve the overall heat exchange efficiency of the evaporator.
[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0007] According to one aspect of the present invention, the present invention provides a computer room air conditioner, which includes a cabinet and a refrigeration system, wherein the refrigeration system includes a compressor, a condenser, a first electronic expansion valve, a flash economizer and an evaporator; the exhaust port of the compressor is connected to the inlet of the condenser, and the outlet of the condenser is connected to the input port of the flash economizer through the first electronic expansion valve; the input end of the evaporator is provided with a liquid inlet pipe group, the input end of the liquid inlet pipe group has a liquid inlet main pipe, and the liquid inlet main pipe is connected to the liquid outlet of the flash economizer; the output end of the liquid inlet pipe group is provided with a plurality of liquid distribution pipes, one end of the liquid distribution pipe is connected to the liquid inlet main pipe, and the other end is connected to the input end of the evaporator, and a throttle valve is provided in the liquid distribution pipe; the air outlet of the flash economizer is connected to the output end of the evaporator, and the output end of the evaporator and the air outlet of the flash economizer are both connected to the air intake of the compressor.
[0008] The embodiments of the present invention have the following advantages and positive effects:
[0009] In the computer room air conditioner of the embodiment of the present invention, a liquid inlet pipe group is provided at the input end of the evaporator, and a plurality of liquid distribution pipes are provided at the output end of the liquid inlet pipe group. Throttle valves are respectively arranged in the plurality of liquid distribution pipes. At the same time, the compressor, the condenser, and the first electronic expansion valve are connected in sequence, and the input port of the flash economizer is connected in succession. The liquid outlet of the flash economizer is connected to the input end of the liquid inlet pipe group, and the gas outlet of the flash economizer is connected to the output end of the evaporator. The flash economizer can be used to separate the refrigerant into gas and liquid, and the pure gas refrigerant that affects the uniformity of the refrigerant distribution is directly transported to the output end of the evaporator, so that the pure liquid refrigerant enters the evaporator through the liquid inlet pipe group, and the flash gas is prevented from entering the throttle valve in the liquid inlet pipe group, thereby improving the liquid distribution uniformity of the liquid inlet pipe group. By adjusting the valve core aperture specification of each throttle valve, it can be achieved that each evaporator flow path can be allocated to a suitable refrigerant flow rate, thereby improving the overall heat exchange efficiency of the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of a refrigeration system of a computer room air conditioner according to an embodiment of the present invention.
[0011] Figure 2 It is a structural schematic diagram of a computer room air conditioner according to an embodiment of the present invention.
[0012] Figure 3 yes Figure 2 Schematic diagram of the internal structure.
[0013] Figure 4 yes Figure 3 The schematic diagram of the structure without the control box.
[0014] Figure 5 yes Figure 4 Schematic diagram of the structure without the maintenance plate.
[0015] Figure 6 yes Figure 5 Schematic diagram of part of the refrigeration system.
[0016] Figure 7 yes Figure 6 Schematic diagram of some structures in .
[0017] Figure 8 yes Figure 7 Schematic diagram of the structure of the evaporator.
[0018] Fig. 9 yes Figure 8 Side view of.
[0019] Fig.10 yes Figure 8 Schematic diagram of the structure of the middle liquid inlet pipe group.
[0020] Fig.11 yes Figure 8 Schematic diagram of the structure of the middle outlet trachea group.
[0021] The reference numerals are as follows: 1. box body; 101. first compartment; 102. second compartment; 11. frame; 12. rear box plate; 13. left box plate; 14. right box plate; 15. front box plate; 16. control box; 161. control button; 2. compressor; 21. exhaust port; 22. air intake port; 23. first pressure sensor; 24. air intake pipe; 3. condenser; 31. stop valve; 32. filter; 33. sight glass; 4. evaporator; 40. accommodation space; 41. liquid inlet pipe group; 411. first installation Distribution main pipe; 412, liquid inlet main pipe; 413, liquid distribution pipe; 42, air outlet pipe group; 421, second assembly main pipe; 422, air outlet main pipe; 423, air outlet branch pipe; 43, front fixing plate; 431, maintenance port; 44, maintenance plate; 45, first three-way pipe; 46, second three-way pipe; 5, flash economizer; 51, input port; 52, air outlet; 53, liquid outlet; 54, second pressure sensor; 6, first electronic expansion valve; 7, second electronic expansion valve; 8, evaporating fan; 9, condensing fan. DETAILED DESCRIPTION
[0022] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.
[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0026] Traditional air-cooled room air conditioners usually include two evaporators on the left and right, which are arranged in an A-shape or a V-shape. The throttled refrigerant usually enters the evaporator through two sets of liquid inlet pipes. To ensure uniform liquid distribution between the two evaporators, the liquid inlet pipe set of the evaporator usually includes a brass distributor, multiple diversion pipes and distributor connecting pipes.
[0027] In the relevant computer room air conditioner, as the number of shunt pipes in the liquid inlet pipe group of the evaporator increases, the liquid separation stability inside the evaporator becomes worse, which is referred to as the poor shunt effect one; for the polarity of only using one electronic expansion valve for throttling, the refrigerant of the left and right evaporators must be distributed through a three-way pipe after throttling, which makes the liquid separation stability inside the evaporator also worse, which is referred to as the poor shunt effect two. According to the reliability calculation principle, the overall shunt effect of the system is the product of the poor shunt effect one and the poor shunt effect two. The overall liquid separation effect will become worse, affecting the overall heat exchange efficiency of the evaporator.
[0028] Figure 1 It is a structural schematic diagram of a refrigeration system of a computer room air conditioner according to an embodiment of the present invention. Figure 2 It is a structural schematic diagram of a computer room air conditioner according to an embodiment of the present invention. Figure 3 yes Figure 2 Schematic diagram of the internal structure. Figure 4 yes Figure 3 The schematic diagram of the structure without the control box. Figure 5 yes Figure 4 The structural diagram in which the maintenance plate 44 is removed.
[0029] See also Figures 1 to 5 As shown, the computer room air conditioner provided in the embodiment of the present invention mainly includes an indoor unit part and an outdoor unit part, wherein the indoor unit part is arranged in the computer room and the outdoor unit part is arranged outside the computer room.
[0030] It should be noted that most of the structures of the refrigeration system are arranged in the box body 1 of the indoor unit, and part of the refrigeration system is also arranged in the outdoor unit.
[0031] The box body 1 is a rectangular hollow shell structure, and the box body 1 is configured as an outer shell of the computer room air conditioner. It is understandable that in other embodiments, the box body 1 may also be a hollow shell structure of other shapes.
[0032] In some embodiments, the box body 1 includes a frame 11, a rear box plate 12, a left box plate 13, a right box plate 14, and a front box plate 15. The rear box plate 12 is fixed to the rear side wall of the frame 11. The left box plate 13 is fixed to the left side wall of the frame 11. The right box plate 14 is fixed to the right side wall of the frame 11. The front box plate 15 is fixed to the front side wall of the frame 11. The rear box plate 12, the left box plate 13, the right box plate 14, and the front box plate 15 enclose an internal space of the box body 1, and the internal space is used to provide an installation space for the refrigeration system.
[0033] Figure 6 yes Figure 5 Schematic diagram of part of the refrigeration system. Figure 7 yes Figure 6 Schematic diagram of some structures in .
[0034] See also Figures 1 to 7 As shown, in some embodiments, the refrigeration system mainly includes a compressor 2, a condenser 3, an evaporator 4, a flash economizer 5, a first electronic expansion valve 6, a second electronic expansion valve 7, an evaporating fan 8 and a condensing fan 9. Among them, the compressor 2, the condenser 3, the flash economizer 5 and the evaporator 4 are connected in sequence through pipelines to form a pipeline loop. The refrigerant circulates in the pipeline loop to achieve cooling inside the machine room. In addition, the condenser 3 and the condensing fan 9 are arranged outside the machine room as the outdoor unit part. The compressor 2, the evaporator 4, the flash economizer 5, the first electronic expansion valve 6, the second electronic expansion valve 7 and the evaporating fan 8 are arranged in the box 1 of the indoor unit as the indoor unit part.
[0035] It should be noted that, in some other embodiments, the condenser 3 and the condensing fan 9 may also be arranged in other areas inside the machine room.
[0036] See also Figure 1 and Figure 7 As shown, the compressor 2 is used to compress the refrigerant to form a high-temperature and high-pressure liquid refrigerant. The compressor 2 has an exhaust port 21 and an air intake port 22. The exhaust port 21 of the compressor 2 is connected to the input end of the condenser 3 through a pipeline, thereby transporting the liquid refrigerant into the condenser 3.
[0037] The condenser 3 is used to condense the refrigerant to reduce the temperature of the refrigerant. The condensing fan 9 blows air toward the condenser 3 to improve the condensation efficiency. The output end of the condenser 3 is connected to the input end of the first electronic expansion valve 6 through a pipeline, and the condensed refrigerant is then transported into the first electronic expansion valve 6.
[0038] In some embodiments, both the input and output ends of the condenser 3 are provided with a stop valve 31 to facilitate connection or separation with the exhaust port 21 of the compressor 2 of the indoor unit and the input end of the first electronic expansion valve 6 through the stop valve 31.
[0039] See also Figure 1 and Figure 7 As shown, the first electronic expansion valve 6 is used to throttle and reduce the pressure of the refrigerant, so that the liquid refrigerant becomes a gas-liquid mixed refrigerant, commonly known as refrigerant flash. The output end of the first electronic expansion valve 6 is connected to the input port 51 of the flash economizer 5 through a pipeline, and then the gas-liquid mixed refrigerant is transported into the flash economizer 5.
[0040] In some embodiments, a filter 32 is further provided between the output end of the condenser 3 and the input end of the first electronic expansion valve 6. The filter 32 plays a role in filtering impurities. The filter 32 can also be used to absorb part of the moisture in the refrigerant.
[0041] In some embodiments, a sight glass 33 is provided between the output end of the condenser 3 and the input end of the first electronic expansion valve 6, and the sight glass 33 is provided downstream of the filter 32. The sight glass 33 is used to display the liquid level of the refrigerant or the water vapor content in the refrigerant.
[0042] See also Figure 1 and Figure 7As shown, the flash economizer 5 is used to separate the gas-liquid mixed refrigerant. The output end of the flash economizer 5 has an air outlet 52 and a liquid outlet 53. The air outlet 52 is arranged at the top of the flash economizer 5, and the air outlet 52 is connected to the top area inside the flash economizer 5. The liquid outlet 53 is arranged below the air outlet 52 at intervals, and the liquid outlet 53 is connected to the bottom area inside the flash economizer 5. After the refrigerant enters the flash economizer 5 and is separated from the gas and liquid, the liquid refrigerant is located in the bottom area of the flash economizer 5, and the gas refrigerant is located in the top area of the flash economizer 5.
[0043] The liquid outlet 53 of the flash economizer 5 is connected to the input end of the evaporator 4 through a pipeline, and the gas outlet 52 of the flash economizer 5 is connected to the output end of the evaporator 4 through a pipeline. Therefore, after the refrigerant enters the flash economizer 5 for gas-liquid separation, the liquid refrigerant can enter the evaporator 4 through the liquid outlet 53 for evaporation, and the gas refrigerant can be directly transported to the output end of the evaporator 4 through the gas outlet 52, and the pure gas refrigerant that affects the uniformity of the refrigerant distribution is directly transported to the output end of the evaporator 4, so that the pure liquid refrigerant enters the evaporator 4, thereby improving the overall heat exchange efficiency of the evaporator 4.
[0044] It should be noted that after the output end of the evaporator 4 and the air outlet 52 of the flash economizer 5 are merged, they are connected to the air intake 22 of the compressor 2 through a pipeline, and then a pipeline loop can be formed between the compressor 2, the condenser 3, the flash economizer 5 and the evaporator 4, so that the refrigerant can circulate in the pipeline loop.
[0045] See also Figures 1 to 7 As shown, in some embodiments, the second electronic expansion valve 7 is used to throttle and reduce the pressure of the gas refrigerant in the flash economizer 5. The second electronic expansion valve 7 is arranged in the pipeline between the gas outlet 52 of the flash economizer 5 and the output end of the evaporator 4. That is, the gas outlet 52 of the flash economizer 5 is connected to the input end of the second electronic expansion valve 7 through a pipeline, and the output end of the second electronic expansion valve 7 is connected to the output end of the evaporator 4 through a pipeline. Therefore, the gas refrigerant in the flash economizer 5 needs to be throttled and reduced in pressure by the second electronic expansion valve 7 before being transported to the output end of the evaporator 4 to ensure that the pressure value in the flash economizer 5 is higher than the pressure value at the output end of the evaporator 4, thereby ensuring that the pressure value of the refrigerant before entering the evaporator 4 is higher than the pressure value after passing through the evaporator 4, so that there is a pressure difference between the two. This pressure difference can promote the smooth flow of the refrigerant in the evaporator 4, and this pressure difference can be changed by adjusting the opening of the second electronic expansion valve 7.
[0046] It should be noted that the second electronic expansion valve 7 can also be used to adjust the liquid level height inside the flash economizer 5. For example, by reducing the opening of the second electronic expansion valve 7, the flow rate of the flash gas can be reduced, thereby controlling the liquid level inside the flash economizer 5 to drop; conversely, by increasing the opening of the second electronic expansion valve 7, the flow rate of the flash gas can be increased, thereby controlling the liquid level inside the flash economizer 5 to rise. Therefore, the second electronic expansion valve 7 can be used as a control device to control the liquid level inside the flash economizer 5 between the maximum value and the minimum value, ensuring that the liquid refrigerant does not return to the compressor 2 through the gas outlet 52 to cause liquid hammer, and at the same time ensuring that the gas refrigerant enters the evaporator 4 through the liquid outlet 53 to affect the heat exchange efficiency of the evaporator 4.
[0047] In addition, while ensuring that the liquid level in the flash economizer 5 is appropriate, the pressure difference between the flash economizer 5 and the output end of the evaporator 4 can be maximized by adjusting the opening of the electronic expansion valve, thereby increasing the circulation rate of the refrigerant in the evaporator 4.
[0048] See also Figures 1 to 7 As shown, in some embodiments, the output end of the evaporator 4 is provided with a first pressure sensor 23, and the first pressure sensor 23 is used to detect the air pressure value in the output end of the evaporator 4. The flash economizer 5 is provided with a second pressure sensor 54, and the second pressure sensor 54 is used to detect the air pressure value inside the flash economizer 5. Therefore, the liquid level inside the flash economizer 5 can be accurately controlled by the first pressure sensor 23 and the second pressure sensor 54 in conjunction with the second electronic expansion valve 7, and the pressure difference between the flash economizer 5 and the output end of the evaporator 4 can be accurately controlled.
[0049] In some embodiments, an electronic liquid level meter (not shown in the figure) is provided inside the flash economizer 5, and the electronic liquid level meter can detect the liquid level height value inside the flash economizer 5 in real time to ensure that the liquid level height inside the flash economizer 5 is between the maximum height value and the minimum height value.
[0050] See also Figures 1 to 7 As shown, in some embodiments, an air intake pipe 24 is provided at the air intake port 22 of the compressor 2, and one end of the air intake pipe 24 is connected to the air intake port 22 of the compressor 2. The output end of the evaporator 4 and the end of the second electronic expansion valve 7 away from the flash economizer 5 are respectively connected to the air intake pipe 24. Therefore, the air outlet 52 of the flash economizer 5 and the output end of the evaporator 4 can be connected to the air intake port 22 of the compressor 2 through the air intake pipe 24, and the gas refrigerant in the flash economizer 5 can be mixed with the gas refrigerant flowing out of the output end of the evaporator 4 after throttling and depressurization of the second electronic expansion valve 7, and the mixed gas refrigerant returns to the compressor 2 through the air intake port 22.
[0051] In some embodiments, the output end of the evaporator 4 is connected to the end of the air intake pipe 24 away from the air intake port 22. The end of the second electronic expansion valve 7 away from the flash economizer 5 is connected to the outer wall of the air intake pipe 24, and further connected to the inside of the air intake pipe 24. It should be noted that in other embodiments, the end of the second electronic expansion valve 7 away from the flash economizer 5 can also be directly connected to the output end of the evaporator 4.
[0052] In some embodiments, the first pressure sensor 23 is disposed on the air intake pipe 24. The first pressure sensor 23 is used to detect the air pressure value in the air intake pipe 24, and then can detect the pressure value at the output end of the evaporator 4. It should be noted that in other embodiments, the first pressure sensor 23 can also be directly disposed on the output end of the evaporator 4.
[0053] Figure 8 yes Figure 7 Schematic diagram of the structure of the evaporator 4. Fig. 9 yes Figure 8 Side view of. Fig.10 yes Figure 8 Schematic diagram of the structure of the liquid inlet pipe group 41.
[0054] See also Figures 7 to 10 As shown, in some embodiments, the input end of the evaporator 4 is provided with a liquid inlet pipe group 41, and the liquid inlet pipe group 41 includes a first assembly main pipe 411, a liquid inlet main pipe 412 and a plurality of liquid distributors 413. Among them, the liquid inlet main pipe 412 serves as the input end of the liquid inlet pipe group 41, one end of the liquid inlet main pipe 412 is connected to the liquid outlet 53 of the flash economizer 5, and the other end of the liquid inlet main pipe 412 is connected to the first assembly main pipe 411. The plurality of liquid distributors 413 serve as the output end of the liquid inlet pipe group 41, one end of the liquid distributor 413 is connected to the first assembly main pipe 411, and the other end of the liquid distributor 413 is connected to the input end of the evaporator 4, and a throttle valve (not shown in the figure) is provided in the liquid distributor 413. Therefore, the liquid refrigerant in the flash economizer 5 can enter the first assembly main pipe 411 through the liquid inlet main pipe 412, and then enter different liquid distributors 413 respectively, and enter the evaporator 4 after being throttled by the throttle valve in the liquid distributor 413.
[0055] It should be noted that, since the refrigerant entering the first assembly main pipe 411 is pure liquid, the pressure before entering the throttle valve of each liquid distribution pipe 413 is basically the same, and the flash gas refrigerant will not occupy the top space of the first assembly main pipe 411, resulting in the throttle valve near the top not being able to distribute enough liquid. Therefore, by adjusting the throttle valve core aperture specifications of each evaporator 4, it can be achieved that each evaporator 4 flow path can be allocated with a suitable refrigerant flow, thereby improving the overall heat exchange effect of the evaporator 4.
[0056] Fig.11 yes Figure 8 A schematic structural diagram of the middle air outlet pipe assembly 42.
[0057] See also Figures 7 to 11 As shown, in some embodiments, the output end of the evaporator 4 is provided with an outlet pipe group 42, and the outlet pipe group 42 includes a second assembly main pipe 421, an outlet main pipe 422, and a plurality of outlet branch pipes 423. Among them, the plurality of outlet branch pipes 423 serve as the input end of the outlet pipe group 42, and one end of the plurality of outlet branch pipes 423 is respectively connected to the output end of the evaporator 4. The other ends of the plurality of outlet branch pipes 423 are respectively connected to the second assembly main pipe 421. The outlet main pipe 422 serves as the output end of the outlet pipe group 42, and one end of the outlet main pipe 422 is connected to the second assembly main pipe 421, and the other end of the outlet main pipe 422 is connected to an end of the air intake pipe 24 away from the air intake port 22. Therefore, after the liquid refrigerant in the evaporator 4 evaporates to form a gaseous refrigerant, it can enter the second assembly main pipe 421 through multiple gas outlet pipes 423, and then enter the intake pipe 24 through the gas outlet main pipe 422, and then mix with the gaseous refrigerant flowing out of the gas outlet 52 of the flash economizer 5 and return to the compressor 2 through the intake port 22.
[0058] In some embodiments, a plurality of evaporation tubes are provided in the evaporator 4, and the plurality of evaporation tubes are connected to the plurality of liquid distribution tubes 413 and the plurality of gas outlet distribution tubes 423 in a one-to-one correspondence. One end of the evaporation tube is connected to the liquid distribution tube 413, and the other end of the evaporation tube is connected to the gas outlet distribution tube 423. Therefore, in different liquid distribution tubes 413, the liquid refrigerant enters different evaporation tubes in the evaporator 4 after being throttled by the throttle valve in the liquid distribution tube 413 to evaporate and absorb heat, and the formed gas refrigerant flows out through different gas outlet distribution tubes 423.
[0059] See also Figures 1 to 7 As shown, in some embodiments, the refrigeration system includes two evaporators 4, the two evaporators 4 are connected in a left-right splicing manner, and an accommodation space 40 is formed between the two evaporators 4. The compressor 2 and the flash economizer 5 can be inserted into the accommodation space 40, and the first electronic expansion valve 6, the second electronic expansion valve 7, the sight glass 33, the drying filter 32 and other devices can be arranged in the accommodation space 40, which is beneficial to reducing the overall volume of the box 1, reducing the space occupied by the machine room, and reducing costs.
[0060] In some embodiments, a front fixing plate 43 is provided between the front ends of the two evaporators 4, and a rear fixing plate (not shown in the figure) is provided between the rear ends of the two evaporators 4. The accommodation space 40 is enclosed in the area between the two evaporators 4, the front fixing plate 43, and the rear fixing plate. The modules of the two evaporators 4 can be fixed as a whole by the front fixing plate 43 and the rear fixing plate, and the structure in the accommodation space 40 can also be kept stable.
[0061] See also Figures 5 to 7As shown, in some embodiments, the internal space of the housing 1 is divided into a first bin 101 and a second bin 102, and the first bin 101 is arranged above the second bin 102. Two evaporators 4 are arranged in the first bin 101, the upper ends of the two evaporators 4 are close to and fixedly connected, the lower ends of the two evaporators 4 are arranged at intervals, and the accommodating space 40 is formed between the lower ends of the two evaporators 4, so that the two evaporators 4 form an A-shaped structure. The accommodating space 40 is connected to the top area of the second bin 102. At the same time, the evaporating fan 8 is arranged in the second bin 102, and the evaporating fan 8 is arranged below the evaporator 4 and the accommodating space 40, and is connected to the accommodating space 40. The evaporating fan 8 can extract the air in the first bin 101 and the accommodating space 40, and transport the extracted air from the bottom of the housing 1 into the machine room. Specifically, under the action of the wind force of the evaporating fan 8, the air in the machine room can enter the box body 1 from the top or side wall of the box body 1, flow through the evaporator 4 and enter the accommodating space 40 after being cooled by the evaporator 4, and be extracted by the evaporating fan 8, and the extracted cold air is transported into the machine room from the bottom of the box body 1, thereby achieving cooling and refrigeration in the machine room.
[0062] In some embodiments, the compressor 2 and the flash economizer 5 are both arranged in the area between the evaporator 4 and the evaporation fan 8. The upper ends of the compressor 2 and the flash economizer 5 extend into the accommodation space 40, and the lower ends of the compressor 2 and the flash economizer 5 extend into the top area of the second bin 102. When the evaporation fan 8 blows air to the accommodation space 40 and the evaporator 4, the air can flow through the surface of the compressor 2 and the flash economizer 5, thereby dissipating heat for the compressor 2 and the flash economizer 5.
[0063] It should be noted that, in other embodiments, the two evaporators 4 may also be arranged in the second bin 102, the lower ends of the two evaporators 4 are close to and fixedly connected, the upper ends of the two evaporators 4 are arranged at intervals, and the accommodating space 40 is formed between the upper ends of the two evaporators 4, so that the two evaporators 4 form a V-shaped structure. The accommodating space 40 is connected to the first bin 101. At the same time, the evaporating fan 8 is arranged in the first bin 101, and the evaporating fan 8 is arranged above the evaporator 4 and the accommodating space 40, and is connected to the accommodating space 40. The evaporating fan 8 can extract the air in the second bin 102 and the accommodating space 40, and transport the extracted air from the top of the box body 1 into the machine room. Specifically, under the action of the wind force of the evaporating fan 8, the air in the machine room can enter the box body 1 from the bottom or side wall of the box body 1, flow through the evaporator 4 and enter the accommodating space 40 after being cooled by the evaporator 4, and be extracted by the evaporating fan 8, and the extracted cold air is transported into the machine room from the top of the box body 1, thereby achieving cooling and refrigeration in the machine room.
[0064] See also Figures 3 to 5As shown, in some embodiments, a maintenance port 431 is provided on the front fixing plate 43, and the maintenance port 431 is connected to the front end area of the accommodating space 40. A maintenance panel 44 is provided at the maintenance port 431, and the maintenance panel 44 is detachably packaged at the maintenance port 431. When the maintenance panel 44 is removed from the maintenance port 431, the compressor 2 and the flash economizer 5 can be exposed at the maintenance port 431.
[0065] In some embodiments, the compressor 2 and the flash economizer 5 are both arranged in the front end area of the accommodating space 40. Therefore, when the maintenance panel 44 is removed from the maintenance port 431, the compressor 2 and the flash economizer 5 can be close to the maintenance port 431, so as to facilitate maintenance of the compressor 2 and the flash economizer 5.
[0066] See also Figures 3 to 5 As shown, in some embodiments, a control box 16 is provided on the front side of the first compartment 101, and the control box 16 is arranged in the front area of the evaporator 4. A plurality of control buttons 161 are provided on the control box 16, and the plurality of control buttons 161 are exposed on the box body 1, so that the operation of the computer room air conditioner can be controlled by the plurality of control buttons 161.
[0067] In some embodiments, the maintenance port 431 and the maintenance panel 44 are separately arranged in different areas on the front side of the evaporator 4 from the control box 16. When the front panel of the box body 1 is removed, the maintenance port 431 and the maintenance panel 44 are exposed on the front side of the evaporator 4, so that the maintenance panel 44 can be removed to maintain the compressor 2 and the flash economizer 5 and other devices in the accommodating space 40.
[0068] See also Figures 4 to 11 As shown, in some embodiments, two groups of liquid inlet pipe groups 41 are provided, and the two groups of liquid inlet pipe groups 41 are arranged one by one at the front end side of the evaporator 4. The liquid inlet pipe group 41 is arranged in a long strip shape, and the extension direction of the liquid inlet pipe group 41 is consistent with the extension direction of the front end face of the evaporator 4. At the same time, two groups of air outlet pipe groups 42 are provided, and the two groups of air outlet pipe groups 42 are arranged in a one-to-one correspondence at the front end side of the evaporator 4, and the air outlet pipe group 42 is arranged side by side with the liquid inlet pipe group 41. The air outlet pipe group 42 is arranged in a long strip shape, and the extension direction of the air outlet pipe group 42 is also consistent with the extension direction of the front end face of the evaporator 4. Therefore, the liquid inlet pipe group 41 and the air outlet pipe group 42 will not occupy the front side space of the area between the two evaporators 4, that is, the two groups of liquid inlet pipe groups 41 and the two groups of air outlet pipe groups 42 will not occupy the front side space of the accommodating space 40. Therefore, the maintenance port 431 and the maintenance plate 44 can be arranged in the front space of the accommodating space 40, and the two groups of liquid inlet pipe groups 41 and the two groups of air outlet pipe groups 42 are evenly arranged on the left and right sides of the maintenance plate 44, which will not affect the maintenance of the components in the accommodating space 40.
[0069] It should be noted that the improved evaporator 4 structure uses a throttle valve in combination with a flash economizer 5 to replace the distributor and the shunt pipe, thus avoiding the problems of poor liquid distribution consistency of the distributor of the traditional evaporator 4, difficulty in shaping the shunt pipe, irregular layout, and occupation of the front space of the evaporator 4. The improved evaporator 4 structure has the advantages of simple structure and improved capacity, and can make full use of the space between the two evaporators 4 to accommodate the compressor 2 and other refrigeration components, so that the entire machine room air conditioning capacity and energy efficiency are improved, the size is reduced, maintenance and repair are easy, and the manufacturing cost is reduced.
[0070] See also Figures 4 to 11 As shown, in some embodiments, the first assembly main pipe 411 of the liquid inlet pipe group 41 and the second assembly main pipe 421 of the gas outlet pipe group 42 are arranged in parallel and spaced apart on the front side of the evaporator 4, and the extending arrangement direction of the first assembly main pipe 411 and the second assembly main pipe 421 is consistent with the extending direction of the front end surface of the evaporator 4. Therefore, the front side space of the evaporator 4 can be maximized, the size of the entire computer room air conditioner can be reduced, the structure is more concise, easy to maintain and repair, and conducive to reducing the manufacturing cost.
[0071] See also Figures 5 to 8 As shown, in some embodiments, a first three-way pipe 45 is provided between the liquid inlet pipe groups 41 of the two groups of evaporators 4, and the liquid inlet main pipes 412 of the two groups of liquid inlet pipe groups 41 are respectively connected to the first port and the second port of the first three-way pipe 45. The third port of the first three-way pipe 45 is connected to the liquid storage port of the flash economizer 5 through a pipeline. Therefore, the liquid refrigerant in the flash economizer 5 can be transported to the two groups of liquid inlet pipe groups 41 through the pipeline and the first three-way pipe 45, and then transported into the two groups of evaporators 4.
[0072] See also Figures 5 to 8 As shown, in some embodiments, a second three-way pipe 46 is provided between the outlet pipe groups 42 of the two groups of evaporators 4, and the outlet main pipes 422 of the two groups of outlet pipe groups 42 are respectively connected to the first port and the second port of the second three-way pipe 46. The third port of the second three-way pipe 46 is connected to the suction pipe 24 through a pipeline. Therefore, the gas refrigerant evaporated in the two groups of evaporators 4 can be transported into the suction pipe 24 through the pipeline and the second three-way pipe 46, and mixed with the gas refrigerant flowing out of the outlet port 52 of the flash economizer 5 and returned to the compressor 2 through the suction port 22.
[0073] Based on the above technical solution, the embodiments of the present invention have at least the following advantages and positive effects:
[0074] In the machine room air conditioner of the embodiment of the present invention, a liquid inlet pipe group 41 is provided at the input end of the evaporator 4, and a plurality of liquid distribution pipes 413 are provided at the output end of the liquid inlet pipe group 41. Throttle valves are arranged in the plurality of liquid distribution pipes 413 respectively. At the same time, the compressor 2, the condenser 3, and the first electronic expansion valve 6 are connected in sequence, and the input port 51 of the flash economizer 5 is connected in succession. The liquid outlet 53 of the flash economizer 5 is connected to the input end of the liquid inlet pipe group 41, and the gas outlet 52 of the flash economizer 5 is connected to the output end of the evaporator 4, so that the flash economizer 5 can be used to generate a gas. The flash economizer 5 separates the refrigerant into gas and liquid, and directly transports the pure gas refrigerant that affects the uniformity of refrigerant distribution to the output end of the evaporator 4, so that the pure liquid refrigerant enters the evaporator 4 through the liquid inlet pipe group 41, and avoids the flash gas from entering the throttle valve in the liquid inlet pipe group 41, thereby improving the liquid separation uniformity of the liquid inlet pipe group 41. By adjusting the throttle valve core aperture specifications of each path, it can be achieved that each evaporator 4 flow path can be allocated with a suitable refrigerant flow, thereby improving the overall heat exchange efficiency of the evaporator 4.
[0075] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A computer room air conditioner, characterized in that: It includes a box and a refrigeration system, wherein the refrigeration system includes a compressor, a condenser, a first electronic expansion valve, a flash economizer and an evaporator; The exhaust port of the compressor is connected to the inlet port of the condenser, and the outlet of the condenser is connected to the input port of the flash economizer through the first electronic expansion valve; The input end of the evaporator is provided with a liquid inlet pipe group, and the input end of the liquid inlet pipe group has a liquid inlet main pipe, and the liquid inlet main pipe is connected to the liquid outlet of the flash economizer; The output end of the liquid inlet pipe group is provided with a plurality of liquid distributing pipes, one end of the liquid distributing pipe is connected with the liquid inlet main pipe, and the other end is connected with the input end of the evaporator, and a throttle valve is provided in the liquid distributing pipe; The air outlet of the flash economizer is connected to the output end of the evaporator, and the output end of the evaporator and the air outlet of the flash economizer are both connected to the air intake port of the compressor.
2. The computer room air conditioner according to claim 1, characterized in that: The liquid inlet pipe group further comprises an assembly main pipe, and one end of the liquid inlet main pipe away from the flash economizer is connected to the assembly main pipe; One end of the liquid distribution pipe away from the evaporator is communicated with the assembly main pipe.
3. The computer room air conditioner according to claim 1, characterized in that: The refrigeration system further comprises a second electronic expansion valve, one end of which is connected to the air outlet of the flash economizer, and the other end of which is connected to the output end of the evaporator.
4. The computer room air conditioner according to claim 3, characterized in that: The output end of the evaporator is provided with a first pressure sensor, and the first pressure sensor is used to detect the air pressure value in the output end of the evaporator; The flash economizer is provided with a second pressure sensor, and the second pressure sensor is used to detect the air pressure value inside the flash economizer.
5. The computer room air conditioner according to claim 4, characterized in that: An air intake pipe is provided at the air intake port of the compressor, and one end of the air intake pipe is connected to the air intake port; The output end of the evaporator and the end of the second electronic expansion valve away from the flash economizer are respectively connected to the suction pipe; The first pressure sensor is disposed on the intake pipe and is used for the air pressure value in the intake pipe.
6. The computer room air conditioner according to claim 5, characterized in that: The output end of the evaporator is provided with an air outlet pipe group, and the input end of the air outlet pipe group is provided with multiple air outlet branch pipes, and the air outlet branch pipes are connected to the output end of the evaporator; the output end of the air outlet pipe group has an air outlet main pipe, and the air outlet main pipe is connected to the end of the air intake pipe away from the air intake port.
7. The computer room air conditioner according to claim 1, characterized in that: There are two evaporators, the two evaporators are connected in a left-right splicing manner, and an accommodating space is formed between the two evaporators; The compressor and the flash economizer extend into and are arranged in the accommodating space.
8. The computer room air conditioner according to claim 7, characterized in that: A front fixing plate is provided between the front ends of the two evaporators, and a rear fixing plate is provided between the rear ends of the two evaporators; The accommodating space is enclosed between the two evaporators, the front fixing plate and the rear fixing plate.
9. The computer room air conditioner according to claim 8, characterized in that: A maintenance opening is provided on the front fixing plate, a maintenance panel is provided at the maintenance opening, and the maintenance panel is detachably sealed at the maintenance opening; When the maintenance panel is removed from the maintenance opening, the compressor and the flash economizer can be exposed from the maintenance opening.
10. The computer room air conditioner according to claim 7, wherein: The box body is provided with a first compartment and a second compartment separated up and down; The two evaporators are arranged in the first bin, the upper ends of the two evaporators are connected, the lower ends of the two evaporators are arranged at an interval, and the accommodating space is formed between the lower ends of the two evaporators; An evaporation fan is provided in the second chamber, and the evaporation fan is arranged below the accommodating space and communicated with the accommodating space.
11. The computer room air conditioner according to claim 7, characterized in that: The box body is provided with a first compartment and a second compartment separated up and down; The two evaporators are arranged in the second bin, the lower ends of the two evaporators are connected, the upper ends of the two evaporators are arranged at an interval, and the accommodating space is formed between the upper ends of the two evaporators; An evaporation fan is provided in the first bin, and the evaporation fan is arranged above the accommodating space and communicated with the accommodating space.