Fluorine pump machine room air conditioning unit

Abstract

The fluorine pump machine room air conditioning unit comprises an indoor unit and an outdoor condenser, the indoor unit comprises a shell, a first evaporator and a second evaporator which are vertically installed are arranged in the shell side by side, the vertical size of the first evaporator is larger than that of the second evaporator, one side of the first evaporator and one side of the second evaporator serve as an air inlet side, and the other side of the first evaporator serves as an air outlet side. The corresponding shell part on the other side is provided with an air feeder, coil pipe outlets of the first evaporator and the second evaporator are connected with a compressor, an outlet of the compressor is connected to an inlet of an outdoor condenser, and an outlet of the outdoor condenser is connected with coil pipe inlets of the first evaporator and the second evaporator through a fluorine pump. The air conditioning unit provided by the utility model has the advantages that the occupied space is small, and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a refrigerant pump room air conditioning unit. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Existing refrigerant pump-based precision air conditioners for computer rooms typically use one outdoor unit for one indoor unit or one outdoor unit for two or more indoor units. Each unit has a large cooling capacity, resulting in a large indoor unit size and requiring a dedicated equipment room. This makes installation near server racks impossible, leading to long air delivery distances and high fan power consumption. To increase the cooling capacity of a single unit, the evaporator coils generally employ a V-shaped design. This V-shaped design increases the coil area within a limited space, resulting in higher air-side resistance in the indoor unit's evaporator coils and lower refrigerant evaporation temperatures. Consequently, the power consumption of the air conditioner's blower and compressor is also high. Therefore, current refrigerant pump-based computer room air conditioners have the following drawbacks:

[0004] First, the indoor units are large, requiring significant installation and maintenance space. Using wall-mounted air supply also necessitates a separate air conditioning room. Therefore, this reduces the area of ​​the IT server room and the number of IT server racks required.

[0005] Second: The indoor units are installed far from servers and other IT equipment, which cannot meet the heat dissipation needs of high-density equipment. When local hot spots occur in the cabinet, it is necessary to increase the air conditioning wall or supply air temperature to reduce the risk of local hot spots, so the energy consumption is high during operation.

[0006] Third: The evaporator coil area of ​​the indoor unit of the air conditioner is small and the air supply distance of the blower is long. Therefore, the power distribution and operation power consumption of the blower unit is high, the IT output is low, and the operating PUE is high.

[0007] Fourth: The small size of the indoor unit results in a small installation space for the air filter. The small cross-sectional size of the indoor unit leads to a high air intake velocity for the air filter, which in turn increases the power distribution and operating power consumption of the blower. Utility Model Content

[0008] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a refrigerant pump room air conditioning unit that has low energy consumption, small size, small installation space, can adapt to higher power density, has better airflow organization, and is more energy-efficient. To achieve the above objective, this utility model adopts the following technical solution:

[0009] An embodiment of this utility model provides a refrigerant pump room air conditioning unit, including an indoor unit and an outdoor condenser. The indoor unit includes a casing, and a first evaporator and a second evaporator are arranged side by side vertically inside the casing. The vertical dimension of the first evaporator is larger than that of the second evaporator. One side of the first evaporator and the second evaporator serves as the air inlet side, and the corresponding part of the casing on the other side is equipped with a blower. The coil outlets of the first evaporator and the second evaporator are connected to a compressor. The outlet of the compressor is connected to the inlet of the outdoor condenser. The outlet of the outdoor condenser is connected to the inlet of the coils of the first evaporator and the second evaporator through a refrigerant pump. The compressor is installed in the mounting area below the second evaporator inside the casing.

[0010] Optionally, the tops of the first and second evaporators are at the same height. In the vertical direction, the first evaporator is installed vertically inside the outer casing, and the area below the second evaporator is the installation area.

[0011] Optionally, a gas-liquid separator is installed on the pipeline between the compressor inlet and the outlet of the coils of the first and second evaporators, and the gas-liquid separator is located within the installation area.

[0012] Optionally, a first check valve located within the installation area is installed on the pipeline between the compressor outlet and the outdoor condenser inlet.

[0013] Optionally, a first bypass pipeline is connected in parallel between the inlet of the compressor and the outlet of the first check valve, and a first shut-off valve is provided on the first bypass pipeline.

[0014] Optionally, a liquid storage tank is provided between the inlet of the fluorine pump and the outlet of the outdoor condenser.

[0015] Optionally, a second shut-off valve is provided between the outlet of the fluorine pump and the inlet of the coils of the first evaporator and the second evaporator.

[0016] Optionally, a second bypass line is provided in parallel between the inlet of the refrigerant pump and the outlet of the second shut-off valve. A second check valve is provided on the second bypass line so that the refrigerant in the second bypass line can only flow toward the coil inlet of the first evaporator and the second evaporator.

[0017] Optionally, an expansion valve is provided at the inlet of the coils of both the first and second evaporators.

[0018] Optionally, a filter is provided on the housing on the air inlet side of the first evaporator and the second evaporator.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The refrigerant pump room air conditioning unit of this utility model has a first evaporator and a second evaporator inside the casing. The first evaporator and the second evaporator are arranged vertically, with one side of the evaporator serving as the air inlet side and the other side serving as the air outlet side, realizing a side air inlet and side air outlet design. The side air outlet design can maximize the cross-sectional size of the evaporator coil, reduce the air outlet velocity, reduce the resistance of the evaporator coil and filter, reduce the design and operating power consumption of the air conditioning equipment's air outlet fan, and improve the energy efficiency of the unit. Moreover, the side air inlet and side air outlet design can be consistent with the air inlet and outlet method of the IT cabinet. When laid parallel to the IT cabinet, the unit's air outlet can be directly delivered to the air inlet of the IT cabinet, reducing air outlet loss and temperature rise, improving the unit's air outlet efficiency, and reducing local hot spots in the cabinet.

[0021] 2. The refrigerant pump room air conditioning unit of this utility model has an installation area below the second evaporator, where a compressor, gas-liquid separator, pipes, valves and other components are installed. This can effectively reduce the thickness of the indoor air conditioning unit. Compared with traditional indoor air conditioning units, the thickness of the unit and the space occupied are greatly reduced. There is no need to set up independent air conditioning components, avoiding the reduction of IT room area and greatly facilitating equipment layout and operation and maintenance. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the air conditioning unit system of Embodiment 1 of this utility model;

[0024] Figure 2 This is a schematic diagram of the indoor unit of Embodiment 1 of this utility model;

[0025] Figure 3 This is a utility model Figure 2 Sectional view along direction A;

[0026] Figure 4 This is a utility model Figure 2 Sectional view along direction B;

[0027] Among them, 1. Outdoor condenser, 2. Compressor, 3. Refrigerant pump, 4. Liquid receiver, 5. Gas-liquid separator, 6. First shut-off valve, 7. First check valve, 8. Second shut-off valve, 9. Second expansion valve, 10. First expansion valve, 11. Second check valve, 12. Second evaporator coil, 13. First evaporator coil, 14. Outer casing, 15. Filter, 16. Second blower, 17. First blower, 18. Installation area. Detailed Implementation

[0028] Example 1

[0029] This embodiment provides a refrigerant pump room air conditioning unit, such as... Figures 1-4 As shown, the system includes an indoor unit and an outdoor condenser 1. The indoor unit includes a casing 14, within which two evaporators are installed vertically, designated as a first evaporator and a second evaporator. The first evaporator is larger than the second evaporator. The first evaporator extends vertically within the casing 14. The space below the second evaporator within the casing is an installation area 18 for installing a gas-liquid separator 5, a compressor 2, refrigerant pipes and valves, and power distribution equipment for the blower. The first evaporator contains a first evaporator coil 13, and the second evaporator contains a second evaporator coil 12. One side of the first evaporator coil 13... One side serves as the air inlet side, and the other side serves as the air outlet side. The air inlet side of the first evaporator coil 13 has a filter 15 installed in the corresponding area on the outer casing to filter the incoming gas. The air outlet side has multiple first air blowers 17 installed in the corresponding area on the outer casing, and the multiple first air blowers 17 are arranged in an array. The air inlet side of the second evaporator coil 12 has a filter 15 installed in the corresponding area on the outer casing 14 to filter the incoming gas. The filter 15 can be an existing device and will not be described in detail here. The air outlet side has multiple second air blowers 16 installed in the corresponding area on the outer casing 14, and the multiple second air blowers 16 are arranged in an array.

[0030] In the vertical direction, since the size of the first evaporator is larger than the size of the second evaporator, the size of the first evaporator coil 13 is larger than the size of the second evaporator coil 12.

[0031] In this embodiment, the design of one large and one small evaporator coil not only effectively utilizes the available space inside the air conditioning indoor unit, but also improves the air supply efficiency of the unit and reduces local hot spots in the cabinet. Since the compressor 2, gas-liquid separator 5 and its auxiliary components, as well as the air supply fan and power distribution components of the air conditioning indoor unit are located below the smaller second evaporator coil 12, this part occupies a certain space. Therefore, the air supply airflow in the cabinet area directly opposite this part is relatively small. In order to solve the problem of the small air supply airflow in this area, a larger first evaporator coil 13 is designed. The larger first evaporator coil 13 adopts a full-height design inside the outer casing 14, which can be consistent with the height of the cabinet. The air supply area is also consistent with the height of the cabinet. Therefore, it effectively solves the problem of insufficient air supply airflow in the cabinet area directly opposite the air conditioning indoor unit and reduces the risk of local hot spots in the cabinet.

[0032] Since the first evaporator coil 13 and the second evaporator coil 12 are arranged vertically, with one side being the air inlet side and the other side being the air outlet side, a side air inlet and side air outlet design is realized. The side air outlet design can maximize the cross-sectional area of ​​the evaporator coil. For the same cooling capacity and supply and return air temperatures, the increased cross-sectional area of ​​the evaporator coil can also reduce the number of coil rows, thereby reducing the air resistance on the coil side and reducing the air inlet velocity of the filter. If the number of coil rows is not reduced, the evaporation temperature of the refrigerant can be increased. The increased evaporation temperature can reduce the power distribution and operating power of the compressor.

[0033] Adopting a side-intake and side-supply design can reduce the supply air velocity, reduce the resistance of the evaporator coil and filter, reduce the design and operating power consumption of the air conditioning unit's blower, and improve the unit's energy efficiency. Moreover, the side-intake and side-supply design can be consistent with the air intake and exhaust method of the IT cabinet. When laid parallel to the IT cabinet, the unit's air supply can be directly delivered to the IT cabinet's air intake, reducing air supply loss and temperature rise, improving the unit's air supply efficiency, and reducing local hot spots in the cabinet.

[0034] In this embodiment, the two evaporator coils of different sizes, one large and one small, are designed with the same cross-sectional wind speed, the same designed inlet and outlet air temperature, the same design resistance of the coils and filters, and the same external static pressure and total pressure of the corresponding air supply fans. The designed air supply volume varies depending on the different cooling capacity supplied by the coils. The control method of the air supply fans corresponding to the two coils can be controlled independently according to the inlet and outlet air temperature of each coil, or it can be controlled uniformly according to the two sets of fans of the entire indoor air conditioning unit.

[0035] The outlets of the first evaporator coil 13 and the second evaporator coil 12 are connected to the inlet of the gas-liquid separator 5 via pipelines. The outlet of the gas-liquid separator 5 is connected to the inlet of the compressor 2 via a pipeline. The outlet of the compressor 2 is connected to the inlet of the outdoor condenser 1 via a pipeline. A first check valve 7 is installed on the pipeline between the inlet of the outdoor condenser 1 and the outlet of the compressor 2, so that the refrigerant can only flow from the compressor 2 to the outdoor condenser 1. The gas-liquid separator 5, the compressor 2, and the first check valve 7 are all located in the installation area 18. A first bypass pipeline is also provided between the inlet of the compressor 2 and the outlet of the first check valve 7. The first bypass pipeline is connected in parallel with the pipeline containing the compressor 2 and the first check valve 7. A first shut-off valve 6 is installed on the first bypass pipeline. The first bypass pipeline and the first shut-off valve 6 are both located in the installation area 18.

[0036] The outlet of the outdoor condenser 1 is connected to the inlet of the first evaporator coil 13 and the second evaporator coil 12 via a pipeline along the refrigerant flow direction, i.e., away from the outdoor condenser 1. A liquid receiver 4, a refrigerant pump 3, and a second shut-off valve 8 are sequentially installed on the pipeline between the outdoor condenser 1 and the first evaporator coil 13 and the second evaporator coil 12. The liquid receiver 4, the refrigerant pump 3, and the second shut-off valve 8 are all intended to be installed outdoors and close to the outdoor condenser 1. In this embodiment, the liquid receiver 4, the refrigerant pump 3, and the shut-off valve are arranged according to actual needs. The refrigerant is installed outdoors near the outdoor condenser 1. The location will not be described in detail here. A second bypass pipe is provided between the inlet of the refrigerant pump 3 and the outlet of the second shut-off valve 8. The second bypass pipe is connected in parallel with the pipes containing the refrigerant pump 3 and the second shut-off valve 8. A second check valve 11 is installed on the second bypass pipe. The second check valve 11 ensures that the refrigerant can only flow from the outdoor condenser 1 to the inlet of the first evaporator coil 13 and the second evaporator coil 12. The second bypass pipe and the second check valve 11 are installed outdoors and near the outdoor condenser.

[0037] Furthermore, the second bypass pipeline is connected in parallel with a third bypass pipeline. A valve 19 is installed on the third bypass pipeline. The valve 19 can be an existing electric valve that can adjust the opening. The valve 19 adjusts its opening according to the outlet pressure of the fluorine pump 3. When the outlet pressure of the fluorine pump 3 is too high, the opening of the valve 19 is increased, thereby increasing the return flow of the medium at the outlet of the fluorine pump 3 and reducing the outlet pressure of the fluorine pump 3. The third bypass pipeline and the valve 19 are installed outdoors and close to the outdoor condenser 1.

[0038] In this embodiment, the installation positions of the second bypass pipeline, the third bypass pipeline, the second check valve 11, and the valve 19 can be set according to actual needs, and will not be described in detail here.

[0039] Furthermore, a first expansion valve 10 is provided at the inlet of the first evaporator coil 13, and a second expansion valve 9 is provided at the inlet of the second evaporator coil 12. Both the first expansion valve 9 and the second expansion valve 10 are located within the installation area 18. Expansion valves are provided at the inlets of the two evaporator coils respectively, and temperature control is performed independently. The blowers corresponding to the coils are also controlled independently.

[0040] Furthermore, the first evaporator 13 and the second evaporator 12 can also be separated into multiple evaporator configurations, which can be configured according to actual needs by those skilled in the art.

[0041] In this embodiment of the refrigerant pump room air conditioner, the area below the second evaporator is the installation area 18, which is equipped with components such as compressor 2, gas-liquid separator 5, pipes and valves. This can effectively reduce the thickness of the air conditioner indoor unit. Compared with traditional air conditioner indoor units, the unit thickness and footprint can be reduced by 60%, which greatly facilitates equipment layout and operation and maintenance.

[0042] The working method of this embodiment is as follows:

[0043] During summer operation, the outdoor condenser 1, compressor 2, liquid receiver 4, gas-liquid separator 5, second expansion valve 9, first expansion valve 10, second evaporator coil 12, first evaporator coil 13, second blower 16, and first blower 17 are started. At this time, the refrigerant pump 3, first shut-off valve 6, and second shut-off valve 8 are closed. The operating process is as follows: the gas-liquid mixture of refrigerant from the second evaporator coil 12 and the first evaporator coil 13 of the indoor unit first enters the gas-liquid separator 5 to separate the gaseous refrigerant, and then enters the compressor 2 to be compressed into a high-temperature, high-pressure gaseous refrigerant, which is then transported to the outdoor unit through the refrigerant pipeline. The refrigerant in condenser 1 is cooled into liquid refrigerant by outdoor air. This liquid refrigerant then passes through the liquid receiver 4 and the second check valve 11 before being directly supplied to the indoor unit of the air conditioner. After expanding through the second expansion valve 9 and the first expansion valve 10, it passes through the second evaporator coil 12 and the first evaporator coil 13 to cool the hot exhaust air from the IT equipment in the computer room. The cooled air is then sent into the IT equipment by the second blower 16 and the first blower 17 to further cool the equipment. The refrigerant vapor that has completely evaporated in the second evaporator coil 12 and the first evaporator coil 13 undergoes gas-liquid separation and enters the compressor 2, where it is pressurized and begins the next refrigeration cycle. To reduce the operating power consumption of the compressor 2, in summer, the system can operate simultaneously with the refrigerant pump 3 and the compressor 2. In this case, the second shut-off valve 8 and the refrigerant pump 3 need to be activated.

[0044] As the outdoor temperature decreases, the equipment undergoes complete natural cooling operation, i.e., the refrigerant pump 3 operates independently. At this time, the compressor 2 is shut off, the first shut-off valve 6 is opened, and the valve 19 adjusts its opening degree according to the outlet pressure of the refrigerant pump 3. All other components are turned on and running. The operating process is as follows: The gas-liquid mixture of refrigerant from the second evaporator coil 12 and the first evaporator coil 13 of the indoor unit of the air conditioner first enters the gas-liquid separator 5 to separate the gaseous refrigerant. Then, it enters the outdoor condenser 1 through the first shut-off valve 6 and the gaseous refrigerant pipeline. In the outdoor condenser 1, it is cooled into liquid refrigerant by the low-temperature outdoor air. The liquid refrigerant is directly supplied to the indoor unit of the air conditioner after passing through the liquid storage tank 4 and the refrigerant pump 3. The liquid refrigerant expands through the second expansion valve 9 and the first expansion valve 10 and then passes through the second evaporator coil 12 and the first evaporator coil 13 to cool the hot exhaust air of the IT equipment in the computer room. The cooled air is sent into the IT equipment by the indoor second blower 16 and the first blower 17 to cool the IT equipment. The refrigerant vapor that has completely evaporated in the second evaporator coil 12 and the first evaporator coil 13 is then separated into gas and liquid and enters the outdoor condenser to be cooled into liquid refrigerant by the low-temperature outdoor air, and then enters the next refrigeration cycle.

[0045] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A refrigerant pump room air conditioning unit, characterized in that, The system includes an indoor unit and an outdoor condenser. The indoor unit includes a casing, inside which a first evaporator and a second evaporator are installed side by side in a vertical manner. The vertical dimension of the first evaporator is larger than that of the second evaporator. One side of the first and second evaporators serves as the air inlet side, and the corresponding part of the casing on the other side is equipped with a blower. The coil outlets of the first and second evaporators are connected to a compressor. The outlet of the compressor is connected to the inlet of the outdoor condenser. The outlet of the outdoor condenser is connected to the inlet of the coils of the first and second evaporators via a refrigerant pump. The compressor is installed in the mounting area below the second evaporator inside the casing.

2. The first type of refrigerant pump room air conditioning unit as claimed in claim 1, characterized in that, The tops of the first evaporator and the second evaporator are at the same height. In the vertical direction, the first evaporator is installed vertically inside the outer casing, and the area below the second evaporator is the installation area.

3. The first type of refrigerant pump room air conditioning unit as described in claim 1, characterized in that, A gas-liquid separator is installed on the pipeline between the compressor inlet and the outlet of the coils of the first and second evaporators. The gas-liquid separator is located within the installation area.

4. The first type of refrigerant pump room air conditioning unit as claimed in claim 1, characterized in that, A first check valve located within the installation area is installed on the pipeline between the compressor outlet and the outdoor condenser inlet.

5. The first type of refrigerant pump room air conditioning unit as described in claim 4, characterized in that, A first bypass pipeline is connected in parallel between the inlet of the compressor and the outlet of the first check valve, and a first shut-off valve is provided on the first bypass pipeline.

6. The first type of refrigerant pump room air conditioning unit as claimed in claim 1, characterized in that, A liquid storage tank is provided between the inlet of the fluorine pump and the outlet of the outdoor condenser.

7. The first type of refrigerant pump room air conditioning unit as claimed in claim 1, characterized in that, A second shut-off valve is provided between the outlet of the fluorine pump and the inlet of the coils of the first evaporator and the second evaporator.

8. The first type of refrigerant pump room air conditioning unit as described in claim 7, characterized in that, A second bypass pipeline is connected in parallel between the inlet of the refrigerant pump and the outlet of the second shut-off valve. A second check valve is provided on the second bypass pipeline so that the refrigerant in the second bypass pipeline can only flow towards the coil inlet of the first evaporator and the second evaporator.

9. The first type of refrigerant pump room air conditioning unit as claimed in claim 1, characterized in that, Expansion valves are installed at the inlet of the coils of both the first and second evaporators.

10. The first type of refrigerant pump room air conditioning unit as claimed in claim 1, characterized in that, A filter is provided on the outer casing of the first evaporator and the second evaporator on the air inlet side.

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