Refrigerant fluorine pump and fluorine pump refrigeration system

Abstract

The application provides a refrigeration fluorine pump and a fluorine pump refrigeration system. The refrigeration fluorine pump comprises a shell, a pump head arranged in the shell, a bypass pipeline arranged outside the shell and a valve assembly. The shell is provided with a main liquid inlet and a main liquid outlet, which are communicated with the pump head through a first internal space and a second internal space respectively. The bypass pipeline communicates the first internal space and the second internal space. The valve assembly is arranged in the bypass pipeline and comprises a fixedly connected elastic element and a movable valve plate. When the operating flow of the refrigeration fluorine pump is less than a first preset flow and the operating head is less than a first preset head, the movable valve plate is driven to move under the action of a first preset force of the elastic element, so that the second internal space is communicated with the first internal space through the bypass pipeline. The application can adjust the output flow of the refrigeration fluorine pump under the condition of low flow, and avoid the problem of excessive refrigeration of the fluorine pump refrigeration system.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of refrigeration, and more particularly, to a refrigeration fluorine pump and a fluorine pump refrigeration system. BACKGROUND

[0002] Air conditioning system is the first large energy consumption system in data center except information technology (IT) equipment. At present, in order to reduce energy consumption, air conditioning system often uses fluorine pump system, that is, fluorine pump is added in the traditional compressor refrigeration cycle, and the compressor refrigeration cycle is used in summer and the like when the outdoor temperature is high, while the fluorine pump refrigeration cycle is used in winter and the like when the outdoor temperature is low. Since the operation power consumption of fluorine pump is less than that of compressor, using fluorine pump refrigeration cycle to replace compressor refrigeration cycle can achieve the purpose of energy saving.

[0003] At present, part of the data center is in the running state of low load all the year round, at this time, the refrigeration capacity required by the fluorine pump system of the data center is small, that is, the output flow required by the fluorine pump system of the fluorine pump is low. However, in actual application, when the fluorine pump operates at a low flow condition, the minimum rated flow of the fluorine pump may be greater than the output flow required by the minimum refrigeration capacity demand of the fluorine pump system, which is easy to cause the fluorine pump system to produce excessive refrigeration, thereby affecting the operation reliability of the fluorine pump system. SUMMARY

[0004] Embodiments of the present application provide a refrigeration fluorine pump and a fluorine pump refrigeration system, which aims to adjust the output flow of the refrigeration fluorine pump when operating at a low flow condition, so as to facilitate meeting the minimum refrigeration capacity demand of the fluorine pump refrigeration system, avoid the problem of excessive refrigeration of the fluorine pump refrigeration system, and improve the operation reliability of the fluorine pump refrigeration system.

[0005] In a first aspect, a refrigeration fluorine pump is provided, comprising a shell, provided with a main liquid inlet and a main liquid outlet, the main liquid inlet being used for inputting refrigerant into the shell, and the main liquid outlet being used for outputting refrigerant in the shell; a pump head arranged in the shell, the pump head comprising a pump head liquid inlet and a pump head liquid outlet, the pump head liquid inlet and the main liquid inlet being communicated through a first internal space, the pump head liquid outlet and the main liquid outlet being communicated through a second internal space, the pump head being used for conveying refrigerant in the first internal space to the second internal space; a bypass pipeline arranged outside the shell, one end of the bypass pipeline being communicated with the first internal space, and the other end of the bypass pipeline being communicated with the second internal space; a valve assembly arranged in the bypass pipeline, the valve assembly comprising an elastic element and a movable valve plate, the elastic element being fixedly connected with the movable valve plate and applying a first pre-acting force to the movable valve plate, wherein the first pre-acting force is equal in value and opposite in direction to a first preset pressure, and the first preset pressure is a pressure applied by refrigerant in the second internal space to the movable valve plate when the refrigeration fluorine pump operates at a first preset flow and a first preset head.

[0006] In a possible case, when the operating flow rate of the refrigeration fluorine pump is less than the first preset flow rate and the operating head is less than the first preset head, the movable valve plate is driven by the elastic element to move in the direction of the first pre-acting force, so that the movable valve plate has a spacing space with the inner wall of the bypass pipeline, and the second internal space can be communicated with the bypass pipeline through the spacing space.

[0007] It should be noted that the operating flow rate can refer to the rated flow rate when the refrigeration fluorine pump is running, and the operating head can refer to the rated head when the refrigeration fluorine pump is running.

[0008] It should also be noted that when the refrigeration fluorine pump is running at a lower flow rate condition, the operating flow rate and the operating head of the refrigeration fluorine pump are relatively small as a whole. In the embodiment of the present application, the operating flow rate of the refrigeration fluorine pump is less than the first preset flow rate, and the operating head is less than the first preset head, which can be understood as that the refrigeration fluorine pump is running at a lower flow rate condition, and accordingly, the refrigeration capacity demand of the fluorine pump refrigeration system is relatively low.

[0009] In the above technical solution, the refrigeration fluorine pump is running at a lower flow rate condition. Since the operating flow rate of the refrigeration fluorine pump is less than the first preset flow rate, and the operating head is less than the first preset head, correspondingly, the pressure exerted by the refrigerant transported to the second internal space through the pump head outlet on the movable valve plate is less than the first pre-acting force exerted by the elastic element on the movable valve plate, and the directions of the two are opposite. At this time, the movable valve plate can be driven by the first pre-acting force exerted by the elastic element to move in the bypass pipeline, so that the movable valve plate is in an open state, and forms a spacing space with the inner wall of the bypass pipeline. Thus, the second internal space and the bypass pipeline are communicated through the spacing space, so that part of the refrigerant transported to the second internal space through the pump head outlet can flow back to the first internal space through the bypass pipeline, so as to reduce the flow rate output by the main outlet of the refrigeration fluorine pump. This can adjust the flow rate output by the main outlet of the refrigeration fluorine pump, which is conducive to avoiding that the output flow rate of the refrigeration fluorine pump at a lower flow rate condition is greater than the output flow rate required by the minimum refrigeration capacity demand of the fluorine pump refrigeration system, and is conducive to meeting the minimum refrigeration capacity demand of the fluorine pump refrigeration system, avoiding the problem of excessive refrigeration of the fluorine pump refrigeration system, thereby improving the operation reliability of the fluorine pump refrigeration system.

[0010] In addition, the opening of the movable valve plate does not need to increase an additional control logic unit, which is conducive to reducing the complexity of the fluorine pump refrigeration system. Moreover, compared with frequently controlling the start of the refrigeration fluorine pump, the above technical solution can not only adjust the output flow rate of the refrigeration fluorine pump at a lower flow rate condition, but also reduce the friction and wear of the refrigeration fluorine pump, thereby improving the reliability of the refrigeration fluorine pump. In addition, the overall structure of the bypass pipeline and the valve assembly is simple, easy to process and generate, and saves manufacturing cost.

[0011] In another possible case, when the running flow rate is greater than or equal to the first preset flow rate and the running head is greater than or equal to the first preset head, the movable valve plate is in sealing connection with the inner wall of the bypass pipeline.

[0012] It should be noted that when the refrigeration fluorine pump is running under a high flow rate condition, the running flow rate and the running head of the refrigeration fluorine pump are relatively large. In the embodiments of the present application, the running flow rate of the refrigeration fluorine pump is greater than or equal to the first preset flow rate, and the running head is greater than or equal to the first preset head, which can be understood as that the refrigeration fluorine pump is running under a low flow rate condition, and accordingly, the refrigeration capacity demand of the fluorine pump refrigeration system is low.

[0013] It can be understood that when the refrigeration fluorine pump is running under a high flow rate condition, since the running flow rate of the refrigeration fluorine pump is greater than the first preset flow rate and the running head is greater than the first preset head, correspondingly, the pressure exerted by the refrigerant transported to the second internal space through the pump head outlet on the movable valve plate is greater than or equal to the first pre-action force exerted by the elastic element on the movable valve plate, and the directions of the two are opposite, so the movable valve plate cannot be moved under the driving of the elastic element. At this time, the movable valve plate is in a closed state, and it is in sealing connection with the bypass pipeline to block the bypass pipeline and the second internal space, so that the refrigerant transported to the second internal space through the pump head outlet is all output through the main outlet. This is conducive to ensuring that the output flow rate of the refrigeration fluorine pump is high when it is running under a high flow rate condition, so as to meet the high refrigeration capacity demand of the fluorine pump refrigeration system.

[0014] Optionally, the pump head can include a pump shaft and an impeller. One end of the pump shaft can be fixedly connected with the impeller, for driving the impeller to rotate, so that the refrigerant is transported from the first internal space to the second internal space under the action of the rotating centrifugal force of the impeller.

[0015] Optionally, the refrigeration fluorine pump can further include a driving mechanism for driving the pump shaft to rotate. The driving mechanism can be fixed to the end of the pump shaft away from the impeller.

[0016] In combination with the first aspect, in some implementations of the first aspect, the shell includes a shell side wall, the main inlet and the main outlet are arranged on two sides of the shell side wall along a first direction, the bypass pipeline is arranged outside the shell side wall, the bypass pipeline includes a first pipeline portion extending along a second direction, one end of the first pipeline portion close to the shell side wall penetrates through the shell side wall and communicates with the second internal space, the first direction and the second direction intersect; and the valve assembly is arranged in the first pipeline portion.

[0017] Optionally, the bypass pipeline can further include a second pipeline portion and a third pipeline portion. The second pipeline portion is connected between the first pipeline portion and the third pipeline portion, and one end of the third pipeline portion away from the second pipeline portion can penetrate through the shell side wall and communicate with the first internal space.

[0018] In the technical solution, in the first direction, the main liquid inlet and the main liquid outlet are arranged in sequence, and the bypass pipeline is located between the main liquid inlet and the main liquid outlet, which is beneficial to ensure that the refrigerant delivered from the pump head outlet to the second internal space first flows into the bypass pipeline before passing through the main liquid outlet, so as to realize the adjustment of the flow output by the main liquid outlet of the refrigerant pump through the bypass pipeline.

[0019] In addition, the valve assembly is arranged in the pipeline part of the bypass pipeline that communicates with the second internal space, which can shorten the flow path of the refrigerant in the bypass pipeline before the output flow is adjusted, and is beneficial to improve the speed and efficiency of the flow adjustment through the bypass pipeline.

[0020] In combination with the first aspect, in some implementations of the first aspect, the elastic element is fixed to the inner wall of the first pipeline part and applies a first pre-action force to the movable valve plate, which is rotationally directed to the side wall of the housing.

[0021] In the technical solution, the pre-action force applied by the elastic element to the movable valve plate can be a rotational force, thereby driving the movable valve plate to rotate in the bypass pipeline.

[0022] In combination with the first aspect, in some implementations of the first aspect, when the operating flow is less than the first preset flow and the operating head is less than the first preset head, the movable valve plate is driven by the elastic element to rotate towards the side wall of the housing, so that there is a spacing between the side wall of the movable valve plate and the inner wall of the first pipeline part.

[0023] In the technical solution, when the refrigerant pump operates at a lower flow condition, the movable valve plate can be driven by the pre-action force applied by the elastic element to rotate and move, so that the movable valve plate is separated from the inner wall of the bypass pipeline, and part of the refrigerant in the second internal space can flow back to the first internal space through the bypass pipeline, so as to adjust the flow output by the main liquid outlet of the refrigerant pump.

[0024] In some implementations of the first aspect, the first pipe portion includes a first pipe branch and a second pipe branch arranged in sequence along a direction from the main liquid inlet to the main liquid outlet, the first pipe branch and the second pipe branch extend along the second direction, one end of the first pipe branch and one end of the second pipe branch close to the side wall of the shell are in communication with the second internal space, one end of the first pipe branch away from the side wall of the shell is in communication with the second pipe branch, one end of the second pipe branch away from the side wall of the shell is in communication with the first internal space, and a cross-sectional dimension of the first pipe branch along the first direction is greater than a cross-sectional dimension of the second pipe branch along the first direction; the elastic element is arranged at the one end of the first pipe branch close to the side wall of the shell, and the movable valve plate is arranged in the second pipe branch, one end of the elastic element is fixed to an inner wall of the first pipe branch close to the main liquid inlet along the first direction, and the other end of the elastic element is fixedly connected with a side wall of the movable valve plate and applies a first pre-action force on the movable valve plate along the first direction from the main liquid outlet to the main liquid inlet.

[0025] In the above technical solution, the pre-action force applied by the elastic element on the movable valve plate can be a translational pulling force, thereby driving the movable valve plate to translate in the bypass pipe.

[0026] In some implementations of the first aspect, when the operating flow rate is less than the first preset flow rate and the operating head is less than the first preset head, the movable valve plate is driven by the elastic element to translate along the first direction to the main liquid inlet, so that there is a spacing between the side wall of the movable valve plate and the inner wall of the second pipe branch.

[0027] In the above technical solution, when the refrigeration pump is operated under a lower flow rate condition, the movable valve plate can be driven by the pre-action force applied by the elastic element to translate along the first direction from the main liquid outlet to the main liquid inlet, so that the movable valve plate is separated from the inner wall of the second pipe branch, and thus part of the refrigerant in the second internal space can flow back to the first internal space through the second pipe branch, so as to adjust the flow rate of the refrigeration pump output through the main liquid outlet.

[0028] In some implementations of the first aspect, the bypass pipe and the shell are integrally formed, which is beneficial to reduce the assembly process of the bypass pipe and the shell, save production manufacturing costs, and make the overall structure of the refrigeration pump more compact.

[0029] In a second aspect, a fluorine pump refrigeration system is provided, comprising: a condenser, an evaporator, and a refrigeration fluorine pump connected between the condenser and the evaporator, wherein the refrigeration fluorine pump comprises: a shell provided with a main liquid inlet and a main liquid outlet, the main liquid inlet is connected with the condenser, and the refrigerant output by the condenser is input into the shell through the main liquid inlet; the main liquid outlet is connected with the evaporator, and the refrigerant in the shell is output through the main liquid outlet; a pump head arranged in the shell, the pump head comprising a pump head liquid inlet and a pump head liquid outlet, the pump head liquid inlet and the main liquid inlet being communicated through a first internal space, the pump head liquid outlet and the main liquid outlet being communicated through a second internal space, and the pump head being used for conveying the refrigerant in the first internal space to the second internal space; a bypass pipeline arranged outside the shell, one end of the bypass pipeline being communicated with the first internal space, and the other end of the bypass pipeline being communicated with the second internal space; and a valve assembly arranged in the bypass pipeline, the valve assembly comprising an elastic element and a movable valve plate, the elastic element being fixedly connected with the movable valve plate and exerting a first pre-acting force on the movable valve plate, wherein the first pre-acting force is equal in value and opposite in direction to a first preset pressure, and the first preset pressure is a pressure exerted by the refrigerant in the second internal space on the movable valve plate when the refrigeration fluorine pump is running at a first preset flow rate and a first preset lift.

[0030] In a possible case, when the running flow rate of the refrigeration fluorine pump is less than the first preset flow rate, and the running lift is less than the first preset lift, the movable valve plate is driven by the elastic element to move in the direction of the first pre-acting force, so that the movable valve plate has a spacing space with the inner wall of the bypass pipeline, and the second internal space can be communicated with the bypass pipeline through the spacing space.

[0031] In another possible case, when the running flow rate is greater than or equal to the first preset flow rate, and the running lift is greater than or equal to the first preset lift, the movable valve plate is in sealing connection with the inner wall of the bypass pipeline.

[0032] Optionally, the fluorine pump refrigeration system can further comprise a compressor, a first bypass, and a second bypass. The compressor, the condenser, the fluorine pump, and the evaporator are connected in sequence and form a closed loop. The first bypass and the compressor are connected in parallel between the evaporator and the condenser, and the second bypass and the refrigeration fluorine pump are connected in parallel between the evaporator and the condenser.

[0033] Optionally, the fluorine pump refrigeration system can further comprise a throttling valve connected between the refrigeration fluorine pump and the evaporator.

[0034] With reference to the second aspect, in some implementations of the second aspect, the housing includes a housing sidewall, the main inlet and the main outlet are disposed on two sides of the housing sidewall along the first direction, the bypass pipeline is disposed outside the housing sidewall, the bypass pipeline includes a first pipeline portion extending along the second direction, an end of the first pipeline portion close to the housing sidewall penetrates through the housing sidewall and communicates with the second internal space, and the first direction and the second direction intersect; and the valve assembly is disposed in the first pipeline portion.

[0035] With reference to the second aspect, in some implementations of the second aspect, the elastic element is fixed to an inner wall of the first pipeline portion and exerts a first pre-action force on the movable valve plate, the first pre-action force being directed by the elastic element to the housing sidewall.

[0036] With reference to the second aspect, in some implementations of the second aspect, when the operating flow rate is less than the first preset flow rate and the operating head is less than the first preset head, the movable valve plate is rotated by the elastic element to have a spacing space between a sidewall of the movable valve plate and an inner wall of the first pipeline portion.

[0037] With reference to the second aspect, in some implementations of the second aspect, the first pipeline portion includes a first pipeline branch and a second pipeline branch disposed in sequence along a direction from the main inlet to the main outlet, the first pipeline branch and the second pipeline branch extend along the second direction, an end of the first pipeline branch and an end of the second pipeline branch close to the housing sidewall respectively communicate with the second internal space, an end of the first pipeline branch away from the housing sidewall communicates with the second pipeline branch, an end of the second pipeline branch away from the housing sidewall communicates with the first internal space, a cross-sectional dimension of the first pipeline branch along the first direction is greater than a cross-sectional dimension of the second pipeline branch along the first direction, the elastic element is disposed at the end of the first pipeline branch close to the housing sidewall, the movable valve plate is disposed in the second pipeline branch, one end of the elastic element is fixed to an inner wall of the first pipeline branch close to the main inlet along the first direction, and the other end of the elastic element is fixedly connected with a sidewall of the movable valve plate and exerts a first pre-action force on the movable valve plate, the first pre-action force being directed by the elastic element to the main inlet along the first direction.

[0038] With reference to the second aspect, in some implementations of the second aspect, when the operating flow rate is less than the first preset flow rate and the operating head is less than the first preset head, the movable valve plate is translated by the elastic element along the first direction to the main inlet to have a spacing space between the sidewall of the movable valve plate and an inner wall of the second pipeline branch.

[0039] With reference to the second aspect, in some implementations of the second aspect, the bypass pipeline and the housing are integrally formed.

[0040] A third aspect provides a data center including the fluorine pump refrigeration system according to any one of the above second aspects.

[0041] The technical effects achieved by the second aspect and the third aspect can be described with reference to the technical effects described in the first aspect, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a schematic structural diagram of a fluorine pump refrigeration system provided by an embodiment of the present application.

[0043] Figure 2 is a schematic diagram of the relationship between the flow rate and the head of a fluorine pump provided by an embodiment of the present application at different rated rotational speeds.

[0044] Figure 3 is a schematic structural diagram of a refrigeration fluorine pump provided by an embodiment of the present application.

[0045] Figure 4 is a schematic structural diagram of a refrigeration fluorine pump provided by an embodiment of the present application operating at a higher flow rate condition.

[0046] Figure 5 is a schematic structural diagram of a refrigeration fluorine pump provided by an embodiment of the present application operating at a lower flow rate condition.

[0047] Figure 6 is a schematic structural diagram of another refrigeration fluorine pump provided by an embodiment of the present application operating at a higher flow rate condition.

[0048] Figure 7 is a schematic structural diagram of another refrigeration fluorine pump provided by an embodiment of the present application operating at a lower flow rate condition.

[0049] Figure 8 is a schematic diagram of a fluorine pump provided by an embodiment of the present application. Figure 6 is a partial structural schematic diagram of the refrigeration fluorine pump shown.

[0050] Figure 9 is a schematic diagram of a fluorine pump provided by an embodiment of the present application. Figure 7 is a partial structural schematic diagram of the refrigeration fluorine pump shown. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

[0052] In order to facilitate understanding of the embodiments of the present application, the following points will be explained before the embodiments of the present application are introduced.

[0053] In the description of the embodiments of the present application, unless otherwise specified, " / " means the meaning of or, for example, A / B can mean A or B; "and / or" herein is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone.

[0054] In the embodiments of the present application, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can include one or more features intelligently or implicitly. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two, "at least one" and "one or more" means one, two or more than two. The singular expression "one", "a kind", "the", "the above", "the", and "this" is intended to also include, for example, the expression "one or more", unless there is clear indication to the contrary in the context.

[0055] In the description of the present application, the reference to "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but not limited to", unless otherwise specifically emphasized.

[0056] In the description of the embodiments of the present application, the terms "up", "down", "left", "right", "in", "out", "vertical", "horizontal" and the like indicate the orientation or positional relationship relative to the orientation in which the components in the drawings are placed, it should be understood that these directional terms are relative concepts, they are used for relative description and clarification, and do not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, which can change accordingly according to the orientation of the components placed in the drawings, therefore, it cannot be understood as a limitation of the present application.

[0057] The same reference signs are used in different embodiments of the present application to represent the same component or the same part. For the same parts in different embodiments of the present application, only one part or component may be labeled with a reference sign in the drawings, and it should be understood that the reference sign is applicable to other same parts or components. In addition, the various parts in the drawings are not drawn to scale, and the size and dimensions of the parts shown in the drawings are only exemplary and should not be construed as limiting the present application.

[0058] Embodiments of the present application define a coordinate system of the drawings. In the coordinate system, the x direction and the y direction intersect. For example, the x direction and the y direction can be perpendicular, or the x direction and the y direction can be arranged at an angle, which can be 40°, 60° or 80°, etc., which is not limited in the present application. For ease of description and understanding, embodiments of the present application are described with the x direction and the y direction being perpendicular. In addition, for ease of description, the x direction and the y direction can also be referred to as the first direction and the second direction, respectively, in embodiments of the present application.

[0059] For ease of understanding, the technical terms involved in the present application are explained and described below.

[0060] Refrigeration capacity: can refer to the total amount of heat removed from a closed space, a room or an area per unit time when the fluorine pump refrigeration system is in refrigeration operation.

[0061] Flow rate: can refer to the amount (volume) of refrigerant delivered by the fluorine pump per unit time in the fluorine pump refrigeration system. The flow rate can be represented by Q.

[0062] Head: also known as pressure head, can refer to the effective energy obtained by unit weight of refrigerant flowing through the fluorine pump in the fluorine pump refrigeration system. The head can be represented by P.

[0063] For ease of understanding the refrigeration fluorine pump provided in embodiments of the present application, the application scenario thereof is first explained below.

[0064] The refrigeration fluorine pump provided in embodiments of the present application can be applied to a fluorine pump refrigeration system in a data center. The data center can be a specific device network for global cooperation to deliver, accelerate, display, calculate and store data information on network infrastructure. The data center generally has a large number of information technology (IT) devices such as servers, etc., which generate a large amount of heat during operation. Excessive heat can easily cause the IT devices to heat up, affecting the safety and working efficiency of the IT devices. Therefore, a dedicated air conditioning system is usually deployed in the data center for heat dissipation to ensure stable operation of the data center. According to the energy consumption analysis of the data center, the air conditioning system is the first energy consumption system in the data center except for the IT devices, and the power consumption generally accounts for more than 40% of the total power consumption of the data center.

[0065] In order to save the power consumption of the air conditioning system, the existing air conditioning system often uses a fluorine pump refrigeration system. The fluorine pump refrigeration system can refer to adding a fluorine pump in the traditional compressor refrigeration system. In the case of high outdoor temperature in summer, a compressor refrigeration cycle is used, and in the case of low outdoor temperature in winter, a fluorine pump refrigeration cycle is used. The fluorine pump drives the refrigerant to guide the heat in the machine room to the outside of the machine room and dissipate to the environment. Since the operating power consumption of the fluorine pump is less than that of the compressor, using the fluorine pump refrigeration cycle to replace the compressor refrigeration cycle can achieve the purpose of energy saving.

[0066] Figure 1 is a schematic structural diagram of a fluorine pump refrigeration system 100 provided by an embodiment of the present application. It should be understood that the fluorine pump refrigeration system 100 can be applied to the above-mentioned data center.

[0067] The fluorine pump refrigeration system 100 can include a compressor 10, a condenser 20, a fluorine pump 30, a throttling valve 40, an evaporator 50, a first bypass 60, and a second bypass 70.

[0068] The compressor 10, the condenser 20, the fluorine pump 30, the throttling valve 40, and the evaporator 50 can be connected in sequence through pipelines and form a closed loop. Among them, the compressor 10 and the fluorine pump 30 can be used to drive the refrigerant to circulate and flow in the closed loop. The compressor 10 can be, for example, a variable frequency compressor, and the fluorine pump 30 can be, for example, a fluorine-lined centrifugal pump, a fluorine-lined magnetic pump, or a fluorine-lined self-priming pump, etc. The evaporator 50 can be arranged indoors for absorbing heat indoors. The condenser 20 can be arranged outdoors for dissipating the heat absorbed by the evaporator 50 to the environment outdoors. The throttling valve 40 can be used for throttling and reducing pressure, so that the refrigerant becomes a low-temperature and low-pressure state. The throttling valve 40 can be, for example, an electronic expansion valve (EEV) with high adjustment capacity and adjustment precision.

[0069] One end of the first bypass 60 can be connected with the pipeline between the evaporator 50 and the compressor 10, and the other end of the first bypass 60 can be connected with the pipeline between the compressor 10 and the condenser 20. That is to say, the first bypass 60 and the compressor 10 are connected in parallel through the pipeline between the evaporator 50 and the condenser 20. The first bypass 60 can be provided with a first bypass valve 61 for controlling the flow of the refrigerant in the first bypass 60.

[0070] One end of the second bypass 70 can be connected with the pipeline between the condenser 20 and the fluorine pump 30, and the other end of the second bypass 70 can be connected with the pipeline between the fluorine pump 30 and the throttling valve 40. That is to say, the second bypass 70 and the fluorine pump 30 are connected in parallel through the pipeline between the condenser 20 and the throttling valve 40. The second bypass 70 can be provided with a second bypass valve 71 for controlling the circulation of the refrigerant in the second bypass 70.

[0071] In some embodiments, the fluorine pump refrigeration system 100 can further include a one-way valve 81 and a one-way valve 82. The one-way valve 81 can be connected with the output port of the compressor 10 through the pipeline, and the one-way valve 82 can be connected with the output port of the fluorine pump 30 through the pipeline, for controlling the flow direction of the refrigerant.

[0072] It can be understood that, Figure 1 The structure shown in FIG. 5 does not constitute a specific limitation on the fluorine pump refrigeration system 100, and the fluorine pump refrigeration system 100 can include more or fewer components than those shown according to actual production and design needs, which are not limited in the present application. The fluorine pump refrigeration system 100 can also be provided with a different arrangement of components than that shown. For example, in some embodiments, the fluorine pump refrigeration system 100 can also not be provided with the throttling valve 40, and the fluorine pump 30 is directly connected between the condenser 20 and the evaporator 50 through the pipeline.

[0073] When the fluorine pump refrigeration system 100 is applied to a data center, the fluorine pump refrigeration system 100 can select different refrigeration modes to refrigerate the machine room of the data center according to different outdoor environment temperatures.

[0074] Specifically, when the outdoor environment temperature is high (for example, when the outdoor environment temperature > 20℃), the fluorine pump refrigeration system 100 can adopt a compression refrigeration mode to refrigerate the machine room. At this time, the compressor 10 can be controlled to operate, the fluorine pump 30 can be stopped, and the one-way valve 81, the second bypass valve 71 and the throttling valve 40 can be opened. After the refrigerant flows out of the compressor 10, it sequentially passes through the one-way valve 81, the condenser 20, the second bypass 70, the throttling valve 40 and the evaporator 50, and then returns to the compressor 10, completing the entire refrigeration cycle.

[0075] When the outdoor environment temperature is low (for example, when the outdoor environment temperature < 10℃), the fluorine pump refrigeration system 100 can adopt a fluorine pump refrigeration mode to refrigerate the machine room. At this time, the compressor 10 can be controlled to stop, the fluorine pump 30 can be controlled to operate, and the first bypass valve 61, the one-way valve 82 and the throttling valve 40 can be opened. After the refrigerant flows out of the fluorine pump 30, it sequentially passes through the one-way valve 81, the throttling valve 40, the evaporator 50, the first bypass 60 and the condenser 20, and then returns to the fluorine pump 30, completing the entire refrigeration cycle.

[0076] When the outdoor ambient temperature is moderate (for example, when 10℃ < outdoor ambient temperature < 20℃), the fluorine pump refrigeration system 100 can adopt a mixed refrigeration mode to refrigerate the machine room. At this time, the compressor 10 and the fluorine pump 30 can be controlled to operate simultaneously, and the one-way valve 81, the one-way valve 82 and the throttling valve 40 are opened. After the refrigerant flows out from the compressor 10, it sequentially passes through the one-way valve 81, the condenser 20, the fluorine pump 30, the one-way valve 82, the throttling valve 40 and the evaporator 50, and then returns to the compressor 10, thereby completing the entire refrigeration cycle.

[0077] The fluorine pump refrigeration system 100 described above can reduce the energy consumption of the compressor 10 by operating refrigeration through the fluorine pump 30 in the fluorine pump refrigeration mode and the mixed refrigeration mode, thereby having a certain energy-saving effect.

[0078] Currently, part of the data center is in a low-load running state (for example, the running load < 20%) all year round. In order to save energy, the fluorine pump refrigeration system 100 generally selects the fluorine pump refrigeration mode to refrigerate the machine room. Due to the low-load running state, the data center needs a small refrigeration capacity of the fluorine pump refrigeration system 100, and accordingly, the fluorine pump 30 needs a small output flow. At this time, the operating speed of the fluorine pump 30 is generally small, so that the fluorine pump 30 can operate under a low flow condition.

[0079] Figure 2 The relationship between the flow and the head of the fluorine pump 30 under different rated speeds is shown in the schematic diagram. Among them, the curve L1 shows the relationship between the flow and the head of the fluorine pump 30 under the first rated speed, and the curve L2 shows the relationship between the flow and the head of the fluorine pump 30 under the second rated speed. Among them, the first rated speed is smaller than the second rated speed, and the first rated speed is the minimum rated speed of the fluorine pump 30.

[0080] Referring to Figure 2 As shown, the flow corresponding to point A on the curve L1 is the minimum rated flow that the fluorine pump 30 can provide. The flow corresponding to point B on the curve L2 is the output flow that the fluorine pump 30 needs to provide for the minimum refrigeration capacity requirement of the fluorine pump refrigeration system 100. Among them, the minimum refrigeration capacity requirement may be, for example, the refrigeration capacity of the fluorine pump system required by the data center with a running load of 10%.

[0081] In actual application, due to the limitation of the principle of the fluorine pump 30 itself, there is a case that the flow corresponding to point A is greater than the flow corresponding to point B, that is, the minimum rated flow of the fluorine pump 30 may be greater than the output flow required by the minimum refrigeration capacity requirement of the fluorine pump refrigeration system 100. This is easy to cause the fluorine pump refrigeration system 100 to produce excessive refrigeration, thereby affecting the operation reliability of the fluorine pump refrigeration system 100.

[0082] Currently, to meet the minimum refrigeration capacity requirement of the fluorine pump refrigeration system 100, the fluorine pump 30 is usually controlled to start and stop so that the output flow of the fluorine pump 30 meets the output flow required by the minimum refrigeration capacity requirement of the fluorine pump refrigeration system 100. Specifically, when the minimum rated flow of the fluorine pump 30 is greater than the output flow required by the minimum refrigeration capacity requirement of the fluorine pump refrigeration system 100, the fluorine pump 30 is controlled to stop; when the minimum rated flow provided by the fluorine pump 30 is less than the output flow required by the minimum refrigeration capacity requirement of the fluorine pump refrigeration system 100, the fluorine pump 30 is controlled to run.

[0083] However, frequent start and stop of the fluorine pump 30 can easily cause friction and wear of structural components in the fluorine pump 30, affecting the reliability of the fluorine pump 30. At the same time, during the start and stop of the fluorine pump 30, the supply air temperature of the fluorine pump refrigeration system 100 is prone to fluctuation, thereby affecting the operation reliability of the IT equipment in the machine room.

[0084] Based on the above, the embodiments of the present application provide a refrigeration fluorine pump and a fluorine pump refrigeration coefficient, which aims to adjust the output flow of the refrigeration fluorine pump when it operates at a lower flow condition, so as to facilitate meeting the minimum refrigeration capacity requirement of the fluorine pump refrigeration system, avoid the problem of excessive refrigeration of the fluorine pump refrigeration system, and improve the operation reliability of the fluorine pump refrigeration system.

[0085] Figure 3 is a schematic structural diagram of a refrigeration fluorine pump 200 provided by the embodiments of the present application. In which, Figure 3 The dashed arrow in shows the flow direction of the refrigerant. It should be understood that the refrigeration fluorine pump 200 can be the fluorine pump 30.

[0086] The refrigeration fluorine pump 200 can include a shell 210, a pump head 220, a bypass pipeline 230, and a valve assembly 240.

[0087] The shell 210 can be provided with a main liquid inlet 211 and a main liquid outlet 212. The shell 210 can be a hollow structure, and the liquid inlet 211 and the liquid outlet 212 can be an opening structure of the shell 210 that communicates the outside of the shell 210 with the inside of the shell 210. The shell 210 as a whole can be, for example but not limited to, a cylindrical shape, a cuboid shape, or a spherical shape, etc., which is not limited by the present application. In specific implementation, the refrigerant can enter the shell 210 through the main liquid inlet 211 and be output from the shell 210 through the main liquid outlet 212, i.e., output from the refrigeration fluorine pump 200.

[0088] The pump head 220 can be arranged in the housing 210. The pump head 220 can include a pump head liquid inlet 221 and a pump head liquid outlet 222. The pump head liquid inlet 221 and the main liquid inlet 211 can be communicated through a first internal space R1, and the pump head liquid outlet 222 and the main liquid outlet 212 can be communicated through a second internal space R2. For example, a liquid inlet pipe for communicating the pump head liquid inlet 221 and the main liquid inlet 211 can be arranged in the first internal space R1, and a liquid outlet pipe for communicating the pump head liquid outlet 222 and the main liquid outlet 212 can be arranged in the second internal space R2. The pump head 220 can be used to transport the refrigerant in the first internal space R1 to the second internal space R2.

[0089] In a specific implementation, the refrigeration fluorine pump 200 can be connected between the condenser 20 and the evaporator 50 of the fluorine pump refrigeration system 100 shown. Figure 1 The main liquid inlet 211 can be connected to the condenser 20 through a pipeline, and the main liquid outlet 212 can be connected to the evaporator 50 through a pipeline. After the refrigerant is output from the condenser 20, it can enter the first internal space R1 of the housing 210 through the main liquid inlet 211, and then enter the pump head 220 through the pump head liquid inlet 221. Then, under the action of the pump head 220, the refrigerant can be output from the pump head liquid outlet 222, enter the second internal space R2, and then be output from the refrigeration fluorine pump 200 through the main liquid outlet 212, and enter the evaporator 50.

[0090] The bypass pipe 230 can be arranged outside the housing 210. The first end 231 of the bypass pipe 230 can communicate with the first internal space R1, and the second end 232 of the bypass pipe 230 can communicate with the second internal space R2, so as to form a channel for the refrigerant to flow back from the second internal space R2 to the first internal space R1. The bypass pipe 230 and the housing 210 can be integrally formed, thereby reducing the assembly process of the bypass pipe 230 and the housing 210, saving production manufacturing cost, and making the overall structure of the refrigeration fluorine pump 200 more compact.

[0091] The valve assembly 240 can be arranged in the bypass pipe 230 and used to communicate or block the bypass pipe 230 and the second internal space R2. The valve assembly 240 can include an elastic element 241 and a movable valve plate 242. The elastic element 241 can be fixed to the inner wall 233 of the bypass pipe 230. The elastic element 241 can be a spring, a spring sheet or the like. The elastic element 241 can be fixedly connected with the movable valve plate 242 and apply a first pre-acting force F p to the movable valve plate 242. The first pre-acting force F p is equal in value and opposite in direction to the first preset pressure. The first preset pressure can be a pressure of the refrigeration fluorine pump 200 at a first preset flow rate Q p and a first preset lift P pWhen operating in this state, the pressure exerted on the movable valve plate 242 by the refrigerant delivered to the second internal space R2 by the pump head outlet 222.

[0092] In one possible example, such as Figure 3 As shown, the refrigerant delivered from the pump head outlet 222 to the second internal space R2 can apply pressure to the movable valve plate 242. Figure 3 The upward pressure F shown w The elastic element 241 can apply a downward first pre-force F to the movable valve plate 242. p The two are in opposite directions.

[0093] In one possible scenario, when the operating flow rate Q of the refrigerant pump 200... w Less than the first preset flow rate Q p Operating head P w Less than the first preset head P p At that time, driven by the elastic element 211, the movable valve plate 242 can move along the first pre-acting force F. p The movement of the valve plate 242 creates a gap between the movable valve plate 242 and the inner wall 233 of the bypass pipe 230, allowing the second internal space R2 to communicate with the bypass pipe 230 through this gap. At this time, a portion of the refrigerant delivered to the second internal space R2 from the pump head outlet 222 can flow back to the first internal space R1 through the bypass pipe 230 via this gap.

[0094] It should be noted that the operating flow rate in the embodiments of this application can refer to the rated flow rate of the refrigerant pump 200 during operation, and the operating head can refer to the rated head of the refrigerant pump 200 during operation.

[0095] It should also be noted that when the refrigerant pump 200 operates under low flow conditions, its overall operating flow rate and operating head are relatively small. In the embodiment of this application, the operating flow rate Q of the refrigerant pump 200 is... w Less than the first preset flow rate Q p And the operating head P w Less than the first preset head P p This can be understood as the refrigerant pump 200 operating under low flow conditions, and correspondingly, the cooling capacity requirement of the refrigerant pump refrigeration system is low.

[0096] Specifically, when the refrigerant pump 200 operates under low flow conditions, due to the operating flow rate Q of the refrigerant pump 200... w Less than the first preset flow rate Q p Operating head P w Less than the first preset head P pCorrespondingly, the refrigerant delivered to the second internal space R2 through the pump head outlet 222 exerts a pressure F on the movable valve plate 242 w The first pre-applied force F exerted by the elastic element 241 on the movable valve plate 242 is less than p and the directions are opposite.

[0097] At this time, the movable valve plate 242 can move, for example, translate or rotate, in the bypass pipeline 230 under the action of the first pre-applied force F exerted by the elastic element 241 p , so that the movable valve plate 242 can be separated from the inner wall 233 of the bypass pipeline 230 to form a spacing space. That is, the movable valve plate 242 is in an open state, and the valve assembly 240 is separated from the bypass pipeline 230. The second internal space R2 can be communicated with the bypass pipeline 230 through the spacing space, so that part of the refrigerant delivered to the second internal space R2 by the pump head outlet 222 can flow back to the first internal space R1 through the bypass pipeline 230, thereby reducing the flow rate output by the refrigerant fluorine pump 200 through the main outlet 212.

[0098] The specific form of the movement of the movable valve plate 242 driven by the elastic element 241 will be described in more detail below in conjunction with the drawings, and only a brief description is given here.

[0099] In another possible case, when the operating flow rate Q of the refrigerant fluorine pump 200 w is greater than or equal to the first preset flow rate Q p , and the operating head P w is greater than or equal to the first preset head P p , the movable valve plate 242 can be in sealing connection with the inner wall 233 of the bypass pipeline 230. At this time, the refrigerant delivered to the second internal space R2 by the pump head outlet 222 can be all output through the main outlet 212.

[0100] It should be noted that when the refrigerant fluorine pump 200 operates under a high flow rate condition, the operating flow rate and the operating head are both relatively large. In the embodiment of the present application, the operating flow rate Q of the refrigerant fluorine pump 200 w is greater than the first preset flow rate Q p , and the operating head P w is greater than the first preset head P p It can be understood that the refrigerant fluorine pump 200 operates under a high flow rate condition, and accordingly, the refrigeration capacity demand of the fluorine pump refrigeration system is high.

[0101] Specifically, when the refrigerant fluorine pump 200 operates under a high flow rate condition, since the operating flow rate Q of the refrigerant fluorine pump 200 w is greater than the first preset flow rate Q p , and the operating head P wgreater than the first preset lift P p Correspondingly, the pressure F exerted on the movable valve plate 242 by the refrigerant delivered to the second internal space R2 through the pump head liquid outlet 222 w greater than the first preset lift P p , and the directions of the two are opposite, so that the movable valve plate 242 cannot be moved by the elastic element 241.

[0102] At this time, the movable valve plate 242 is in sealing connection with the inner wall 233 of the bypass pipeline 230. That is to say, the movable valve plate 242 is in a closed state, and the valve assembly 240 is in sealing fit with the bypass pipeline 230 to block the bypass pipeline 230 and the second internal space R2, so that the refrigerant delivered to the second internal space R2 by the pump head liquid outlet 222 can be output through the main liquid outlet 212. This is conducive to ensuring that the output flow rate of the refrigeration fluorine pump 200 is high when the refrigeration fluorine pump 200 is operated in a high flow rate condition, so as to meet the high refrigeration capacity demand of the fluorine pump refrigeration system.

[0103] In the above technical solution, the bypass pipeline 230 arranged outside the shell 210 forms a reflux channel for the refrigerant. When the refrigeration fluorine pump 200 is operated in a low flow rate condition, the movable valve plate 242 arranged in the bypass pipeline 230 can be in an open state under the action of the pre-action force exerted by the elastic element 241, so as to communicate between the bypass pipeline 230 and the second internal space R2. At this time, part of the refrigerant output by the pump head 220 can be refluxed to the first internal space R1 through the bypass pipeline 230. This can adjust the flow rate output through the main liquid outlet 212 of the refrigeration fluorine pump 200, which is conducive to avoiding that the output flow rate of the refrigeration fluorine pump 200 in a low flow rate condition is greater than the output flow rate required by the minimum refrigeration capacity demand of the fluorine pump refrigeration system, and is conducive to meeting the minimum refrigeration capacity demand of the fluorine pump refrigeration system, avoiding the problem of excessive refrigeration of the fluorine pump refrigeration system, and thus improving the operation reliability of the fluorine pump refrigeration system.

[0104] In addition, the opening of the movable valve plate 242 does not require additional control logic units, which is conducive to reducing the complexity of the fluorine pump refrigeration system. Moreover, compared with frequent control of the start of the refrigeration fluorine pump 200, the above technical solution can adjust the output flow rate of the refrigeration fluorine pump 200 while reducing the friction and wear of the refrigeration fluorine pump 200, thereby improving the reliability of the refrigeration fluorine pump 200. In addition, the overall structure of the bypass pipeline 230 and the valve assembly 240 is simple and easy to process, thereby saving manufacturing costs.

[0105] In some embodiments, the first preset flow rate Q p and the first preset lift P p may be greater than the minimum rated flow rate and the minimum rated lift of the refrigeration fluorine pump 200 when operated at the minimum rated speed, respectively. That is to say, the first pre-action force Fp The value can be greater than the pressure exerted on the movable valve plate 242 by the refrigerant pump 200 when it is operating at its minimum rated flow rate and minimum rated head, as the liquid is delivered from the pump head outlet 222 to the second internal space R2. This allows for adjustment of the output flow rate of the refrigerant pump 200 to meet the minimum cooling capacity requirement of the refrigerant pump refrigeration system, even when the refrigerant pump 200 is operating at its minimum rated flow rate and minimum rated head.

[0106] Understandably, the first preset flow rate Q p and the first preset head P p The specific values ​​can be adjusted according to actual production and design needs, and this application does not impose any restrictions on them.

[0107] The following will provide a more detailed description of the specific manner in which the elastic element 241 drives the movable valve plate 242 to move, with reference to the accompanying drawings.

[0108] In some embodiments provided in this application, when the refrigerant pump 200 is running at a low flow rate, the elastic element 241 can drive the movable valve plate 242 to translate or rotate, so that the movable valve plate 242 is separated from the inner wall 233 of the bypass pipe 230.

[0109] Figure 4 and Figure 5 A schematic diagram of a refrigerant pump 200 in which an elastic element 241 drives a movable valve plate 242 to rotate is shown. Figure 4 This describes the state of the refrigerant pump 200 when operating at a higher flow rate. Figure 5 This describes the state of the refrigerant pump 200 when operating at a lower flow rate. Figure 4 and Figure 5 The dashed arrows in the diagram indicate the direction of refrigerant flow.

[0110] It should be understood that Figure 4 and Figure 5 The refrigerant pump 200 shown may include Figure 3 The following mainly describes the differences between the two, and will not repeat the most of the same content between them.

[0111] Combination Figure 4 and Figure 5 The refrigerant pump 200 may include a housing 210, a pump head 220, a bypass pipe 230, an elastic element 241, and a movable valve plate 242. The pump head 220 may be disposed inside the housing 210, the bypass pipe 230 may be disposed outside the housing 210, and the elastic element 241 and the movable valve plate 242 may be disposed inside the bypass pipe 230.

[0112] In some embodiments, the shell 210 can include a shell side wall 215, and the main inlet 211 and the main outlet 212 can be arranged on both sides of the shell side wall 215 along the x direction. For example, in one example, the shell 210 can further include a first shell end face 213 and a second shell end face 214, which are located on both sides of the shell side wall 215 along the x direction. Among them, the main inlet 211 can be arranged on the first shell end face 213, the main outlet 212 can be arranged on the second shell end face 214, and the bypass pipe 230 is arranged outside the shell side wall 215.

[0113] It can be understood that the arrangement positions of the main inlet 211 and the main outlet 212 on the shell 210 are only schematic, and the specific positions of the main inlet 211 and the main outlet 212 are not specially limited in the embodiments of the present application, which can be adjusted according to actual production and design requirements, as long as the refrigerant can enter the shell 210 through the main inlet 211 and the refrigerant pump 200 can output the refrigerant through the main outlet 212. For example, in other embodiments, the main inlet 211 can be arranged on the first shell end face 213, and the main outlet 212 can be arranged on the shell side wall 215. For the sake of description and understanding, the embodiments of the present application are described by taking the main inlet 211 arranged on the first shell end face 213 and the main outlet 212 arranged on the second shell end face 214 as an example.

[0114] In some embodiments, the pump head 220 can include a pump shaft 223 and an impeller 224. The pump shaft 223 can be fixed to the accommodating space of the shell 210, for example, through a bearing 225. One end of the pump shaft 223 can be fixedly connected with the impeller 224, for rotating the impeller 224, so that the refrigerant is transported from the first internal space R1 to the second internal space R2 under the action of the rotating centrifugal force of the impeller 224. In one embodiment, the extension direction of the pump shaft 223 can be parallel to the x direction.

[0115] The impeller 224 can include an impeller inlet 2241 and an impeller outlet 2242. The impeller inlet 2241 can be in communication with the main inlet 211 on the shell 210 through the first internal space R1, and the impeller outlet 2242 can be in communication with the main outlet 212 on the shell 210 through the second internal space R2. That is, the impeller inlet 2241 can form a pump head inlet 221 of the pump head 220, and the impeller outlet 2242 can form a pump head outlet 222 of the pump head 220.

[0116] In specific implementation, the refrigerant pump 200 can be connected to Figure 1The condenser 20 and the evaporator 50 of the fluorine pump refrigeration system 100 shown. After the refrigerant is output from the condenser 20, it can enter the first internal space R1 of the shell 210 through the main inlet port 211, and then enter the impeller 224 through the impeller inlet port 2241. The impeller 224 is driven to rotate by the pump shaft 223. Under the action of the rotating centrifugal force of the impeller 224, the refrigerant in the impeller 224 is output from the impeller outlet port 2242, enters the second internal space R2, and then is output from the main outlet port 212 to the evaporator 50.

[0117] In some embodiments, to drive the rotation of the pump shaft 223, the refrigerant fluorine pump 200 can further include a driving mechanism 250, which can be fixedly connected to the end of the pump shaft 223 away from the impeller 224. The driving mechanism 250 can be, for example, an electric motor, or a motor, etc. In one embodiment, the driving mechanism 250 can be arranged inside the shell 210. In another embodiment, the driving mechanism 250 can be arranged outside the shell 210, and the end of the pump shaft 223 away from the impeller 224 can extend through the shell 210 to the outside of the shell 210 and be connected to the driving mechanism 250. For the convenience of description and understanding, the embodiments of the present application are described with the driving mechanism 250 arranged inside the shell 210.

[0118] In some embodiments, the bypass pipe 230 can include a first pipe portion 236 extending along the y direction, and the end of the first pipe portion 236 close to the shell side wall 215 can extend through the shell side wall 215 to communicate with the second internal space R2. The end of the first pipe portion 236 away from the shell side wall 215 can communicate with the first internal space R1 through at least one pipe portion. For example, the bypass pipe 230 can further include a second pipe portion 235 and a third pipe portion 234, the second pipe portion 235 can be communicated between the first pipe portion 236 and the third pipe portion 234, and the end of the third pipe portion 234 away from the second pipe portion 235 can extend through the shell side wall 215 to communicate with the first internal space R1.

[0119] In one possible embodiment, the second pipe portion 235 can extend along the x direction, and the third pipe portion 234 can extend along the y direction.

[0120] In some embodiments, the elastic element 241 and the movable valve plate 242 can be arranged in the first pipe portion 236. It can be understood that the specific positions of the elastic element 241 and the movable valve plate 242 are not specially limited in the embodiments of the present application, and they can be adjusted according to actual production and design requirements, for example, the elastic element 241 and the movable valve plate 242 can also be arranged in the third pipe portion 234 or the second pipe portion 235. For the convenience of description and understanding, the embodiments of the present application take the elastic element 241 and the movable valve plate 242 arranged in the first pipe portion 236 as an example for description.

[0121] The elastic element 241 can be fixed to the inner wall 2361 of the first pipe portion 236. For example, as shown in Figure 4 and Figure 5 , the elastic element 241 can be fixed to the inner wall of the first pipe portion 236 on the side away from the main liquid inlet 211 along the x direction (i.e., fixed to the right inner wall of the first pipe portion 236). The elastic element 241 can be fixedly connected with the movable valve plate 242 and exert a first pre-acting force F p on the movable valve plate 242. The first pre-acting force F p may be rotated by the elastic element 241 to point to the side wall 215 of the first housing, and the direction is opposite to the direction of the pressure F w exerted by the refrigerant delivered by the impeller outlet 2242 to the second internal space R2 on the movable valve plate 242. That is, the direction of the first pre-acting force F p is opposite to the flow direction of the refrigerant output by the impeller outlet 2242 in the second internal space R2. The elastic element 251 may, for example, but is not limited to, a torsion spring.

[0122] Exemplarily, in combination with Figure 4 and Figure 5 , the refrigerant delivered by the impeller outlet 2242 to the second internal space R2 flows upward and exerts an upward pressure F w on the movable valve plate 242, and the elastic element 241 exerts a downward rotating first pre-acting force F p on the movable valve plate 242.

[0123] In specific implementation, referring to Figure 4 , when the operating flow rate Q w of the refrigeration pump 200 is greater than the first preset flow rate Q p , and the operating head P w is greater than the first preset head P p , the refrigeration pump 200 operates under a higher flow rate condition. In this case, the pressure F wThe first preload F applied by the elastic element 241 to the movable valve plate 242 is greater than the first preload F. p The movable valve plate 242 cannot rotate downward under the action of the elastic element 241. At this time, the side wall 2421 of the movable valve plate 242 can be sealed to the inner wall 2361 of the first pipe section 236 to block the bypass pipe 230 and the second internal space R2.

[0124] After the refrigerant is discharged from the condenser 20, it enters the first internal space R1 through the main liquid inlet 211, and then enters the impeller 224 through the impeller liquid inlet 2241. The rotation of the impeller 224 then causes the refrigerant to be discharged from the impeller liquid outlet 2242 and enter the second internal space R2. The refrigerant in the second internal space R2 can flow entirely to the right, exiting through the main liquid outlet 212 and being discharged by the refrigerant pump 200 into the evaporator 50.

[0125] See Figure 5 When the operating flow rate Q of the refrigerant pump 200 w Less than the first preset flow rate Q p Operating head P w Less than the first preset head P p At this time, the refrigerant pump 200 operates under low flow conditions. In this situation, the pressure F exerted on the movable valve plate 242 by the refrigerant delivered to the second internal space R2 through the impeller outlet 2242... w The force F exerted by the elastic element 241 on the movable valve plate 242 is less than the first preload force F. p At this time, the movable valve plate 242 can be subjected to the first preload F applied by the elastic element 241. p Under the influence of [something], it rotates in the y-direction in the opposite direction to the refrigerant flow direction, i.e., [something]. Figure 5 As shown, the valve plate 242 rotates downward so that there is a gap between the side wall 2421 of the movable valve plate 242 and the inner wall 2361 of the first pipe section 236, and the second internal space R2 can be connected to the bypass pipe 230 through this gap.

[0126] After the refrigerant is discharged from the condenser 20, it enters the first internal space R1 through the main liquid inlet 211, and then enters the impeller 224 through the impeller liquid inlet 2241. The rotation of the impeller 224 then causes the refrigerant to be discharged from the impeller liquid outlet 2242 and enter the second internal space R2. A portion of the refrigerant in the second internal space R2 can flow upwards and return to the first internal space R1 through the bypass pipe 230. The other portion of the refrigerant in the second internal space R2 can flow to the right, exiting the refrigerant pump 200 through the main liquid outlet 212 and entering the evaporator 50.

[0127] In the above technical solution, when the refrigerant pump 200 operates at a lower flow rate, the movable valve plate 242, under the pre-action force applied by the elastic element 241, rotates in the opposite direction to the flow direction of the refrigerant output from the impeller outlet 2242 in the second internal space R2. This creates a gap between the side wall 2421 of the movable valve plate 242 and the inner wall 233 of the bypass pipe 230. A portion of the refrigerant in the second internal space R2 can flow through this gap into the bypass pipe 230 and then back into the first internal space R1. This regulates the flow rate output by the refrigerant pump 200 through the main outlet 212, helping to prevent the output flow rate of the refrigerant pump 200 from exceeding the minimum cooling capacity requirement of the refrigerant pump refrigeration system at lower flow rates. This helps meet the minimum cooling capacity requirement of the refrigerant pump refrigeration system, avoids over-cooling problems, and improves the operational reliability of the refrigerant pump refrigeration system.

[0128] Figure 6 and Figure 7 A schematic diagram of a refrigerant pump 200 is shown, illustrating how an elastic element 241 drives a movable valve plate 242 to translate. Figure 6 This describes the state of the refrigerant pump 200 when operating at a higher flow rate. Figure 7 This describes the state of the refrigerant pump 200 when operating at a lower flow rate. Figure 6 and Figure 7 The dashed arrows in the diagram indicate the direction of refrigerant flow.

[0129] It should be understood that Figure 6 and Figure 7 The refrigerant pump 200 shown may include Figure 4 and Figure 5 The following mainly describes the differences between the two, and will not repeat the most of the same content between them.

[0130] and Figure 4 and Figure 5 The difference between the illustrated embodiment and the one shown is that, in Figure 6 and Figure 7 In the illustrated embodiment, the first pipe section 236 may further include a first pipe branch 2361 and a second pipe branch 2362 extending along the y-direction. The first pipe branch 2361 and the second pipe branch 2362 may be sequentially arranged along the direction from the main inlet 211 to the main outlet 212, i.e., in... Figure 6 and Figure 7 Set them sequentially from left to right along the x-axis.

[0131] The first pipe branch 2361 can include a third end 2361a proximate to the housing 210 and a fourth end 2361b distal to the housing 210. The second pipe branch 2362 can include a fifth end 2362a proximate to the housing 210 and a sixth end 2362b distal to the housing 210. The third end 2361a of the first pipe branch 2361 and the fifth end 2362a of the second pipe branch 2362 can be in communication with the second internal space R2 through the housing side wall 215, respectively. That is, the third end 2361a of the first pipe branch 2361 and the fifth end 2362a of the second pipe branch 2362 can jointly form the second end 232 of the bypass pipe 230. The fourth end 2361b of the first pipe branch 2361 can be in communication with the second pipe branch 2362, for example, through the first connecting branch 2363. The sixth end 2362b of the second pipe branch 2362 can be in communication with the first internal space R1, for example, the sixth end 2362b of the second pipe branch can be in communication with the second pipe portion 235 and the third pipe portion 234 in sequence to communicate with the first internal space R1. In one possible example, the first connecting branch 2363 can extend along the x direction.

[0132] The elastic element 241 can be arranged at the fourth end 2361b of the first pipe branch 2361, and the movable valve plate 242 can be arranged in the second pipe branch 2363. One end of the elastic element 241 can be fixedly connected to the inner wall of the side of the first pipe branch 2361 proximate to the main liquid inlet 211. The other end of the elastic element 241 can be fixedly connected to the side wall 2421 of the movable valve plate 242. The elastic element 241 can exert a first pre-acting force F p on the movable valve plate 242. The first pre-acting force F p may be a pulling force along the x direction from the main liquid outlet 212 to the main liquid inlet 211.

[0133] Exemplarily, as shown in Figure 6 and Figure 7 , the right end of the elastic element 241 can be fixedly connected to the left inner wall of the first pipe branch 2361 along the x direction, and the left end of the elastic element 241 can be fixedly connected to the movable valve plate 242 through the first connecting branch 2363. The elastic element 241 can exert a first pre-acting force F p on the movable valve plate 242.

[0134] It can be understood that, in combination with Figure 6 and Figure 7The refrigerant delivered to the second internal space R2 through the impeller outlet 2242 can simultaneously flow into the first pipe branch 2361 and the second pipe branch 2362. The refrigerant flowing into the first pipe branch 2361 applies a first force F1 to the movable valve plate 242, with the direction of the first force F1 along the x-direction from the main inlet 211 to the main outlet 212. The refrigerant flowing into the second pipe branch 2362 applies a second force F2 to the movable valve plate 242 along the x-direction from the main outlet 212 to the main inlet 211. The directions of the first force F1 and the second force F2 are opposite.

[0135] Therefore, the refrigerant delivered from the impeller outlet 2242 to the second internal space R2 exerts a pressure F on the movable valve plate 242. w It can be the vector sum of the first force F1 and the second force F2.

[0136] In a specific configuration, the pressure F exerted by the refrigerant delivered from the impeller outlet 2242 to the movable valve plate 242 is such that... w The direction of the first pre-force F applied by the elastic element 241 to the movable valve plate 242 p In the opposite direction, the cross-sectional dimension d1 of the first pipe branch 2361 along the x-direction can be greater than the cross-sectional dimension d2 of the second pipe branch 2362 along the x-direction. At this time, the first force F1 exerted by the refrigerant flowing into the first pipe branch 2261 on the movable valve plate 242 can be greater than the second force F2 exerted by the refrigerant flowing into the second pipe branch 2362 on the movable valve plate 242. The pressure F exerted by the refrigerant delivered from the impeller outlet 2242 to the second internal space R2 on the movable valve plate 242 is also greater. w It can be in the same direction as the first force F1, that is, in the x-direction along the direction from the main inlet 211 to the main outlet 212, which is the same as the first pre-force F applied by the elastic element 241 to the movable valve plate 242. p The directions are opposite.

[0137] For specific implementation, please refer to Figure 6 When the operating flow rate Q of the refrigerant pump 200 w Greater than the first preset flow rate Q p Operating head P w Greater than the first preset head P p At this time, the refrigerant pump 200 operates under high flow conditions. In this situation, the pressure F exerted on the movable valve plate 242 by the refrigerant discharged through the impeller outlet 2242 to the second internal space R2 is... w (That is, the vector sum of the first force F1 and the second force F2) is greater than the first pre-force F applied by the elastic element 241 to the movable valve plate 242. p, the movable valve plate 242 cannot be translated leftward under the driving of the elastic element 241. At this time, the side wall 2421 of the movable valve plate 242 can be in sealing connection with the inner wall 23621 of the second pipeline branch 2362 to block the second pipeline branch 2362 from the second internal space R2.

[0138] When the refrigerant is output from the condenser 20, it can enter the first internal space R1 through the main liquid inlet 211, and then enter the impeller 224 through the impeller liquid inlet 2241. After rotating through the impeller 224, the refrigerant is output from the impeller liquid outlet 2242 into the second internal space R2. The refrigerant in the second internal space R2 can flow entirely to the right, and then be output from the refrigerant pump 200 through the main liquid outlet 212 into the evaporator 50.

[0139] Referring to Figure 7 When the operating flow rate Q w of the refrigerant pump 200 is less than the first preset flow rate Q p , and the operating head P w is less than the first preset head P p , the refrigerant pump 200 operates under a lower flow rate condition. In this case, the pressure F w (being the vector sum of the first action force F1 and the second action force F2) exerted on the movable valve plate 242 by the refrigerant output from the impeller liquid outlet 2242 to the second internal space R2 is less than the first preset action force F p exerted on the movable valve plate 242 by the elastic element 241. At this time, the movable valve plate 242 can be translated in the x direction along the direction from the main liquid outlet 212 to the main liquid inlet 211 under the action of the first preset action force F p exerted by the elastic element 241, i.e., translated leftward as shown in FIG. 13, so that the side wall 2421 of the movable valve plate 242 has a spacing space with the inner wall 23621 of the second pipeline branch 2362, and the second internal space R2 can communicate with the second pipeline branch 2362 through the spacing space. Figure 7

[0140] When the refrigerant is output from the condenser 20, it can enter the first internal space R1 through the main liquid inlet 211, and then enter the impeller 224 through the impeller liquid inlet 2241. After rotating through the impeller 224, the refrigerant is output from the impeller liquid outlet 2242 into the second internal space R2. The refrigerant in the second internal space R2 can flow entirely to the right, and then be output from the refrigerant pump 200 through the main liquid outlet 212 into the evaporator 50.

[0141] ​In the technical solution, when the refrigeration fluorine pump 200 operates in a low flow condition, the movable valve plate 242 can be translated in the x direction from the main liquid outlet 212 to the main liquid inlet 211 under the action of the pre-action force applied by the elastic element 241, so that the side wall 2421 of the movable valve plate 242 and the inner wall 23621 of the second pipeline branch 2362 have a spacing space, and part of the refrigerant in the second internal space R2 can flow into the bypass pipeline 230 through the spacing space and then flow back to the first internal space R1. This can adjust the flow output by the refrigeration fluorine pump 200 through the main liquid outlet 212, which is beneficial to avoid the output flow of the refrigeration fluorine pump 200 in the low flow condition being greater than the required output flow of the fluorine pump refrigeration system for the minimum refrigeration capacity requirement, to meet the minimum refrigeration capacity requirement of the fluorine pump refrigeration system, to avoid the fluorine pump refrigeration system from generating excessive refrigeration, and to improve the operation reliability of the fluorine pump refrigeration system.

[0142] In some embodiments, in combination with Figure 6 and Figure 7 , the side wall 2421 of the movable valve plate 242 and the inner wall 23621 of the second pipeline branch 2362 can be sealingly connected in a plane-to-plane fitting manner.

[0143] In other embodiments, in combination with Figure 8 and Figure 9 , the side wall 2421 of the movable valve plate 242 and the inner wall 23621 of the second pipeline branch 2362 can be sealingly connected in a concave-convex fitting manner. For example, the side wall 2421 of the movable valve plate 242 is provided with a protrusion 2422, and the inner wall 23621 of the second pipeline branch 2362 is provided with a recess 23622, and the protrusion 2422 and the recess 23622 are connected in a fitting manner.

[0144] It can be understood that the specific connection form between the side wall 2421 of the movable valve plate 242 and the inner wall 23621 of the second pipeline branch 2362 is only illustrative, and can be adjusted according to actual production and design requirements, which is not limited in the present application.

[0145] The embodiments of the present application also provide a fluorine pump refrigeration system. As shown in Figure 1 , the fluorine pump refrigeration system can include a condenser, an evaporator, and Figures 3 to 7 the refrigeration fluorine pump 200. The refrigeration fluorine pump 200 can be connected between the condenser and the evaporator. The specific description can be Figure 1 , and will not be repeated here.

[0146] In addition, the embodiments of the present application also provide a data center, which can include the above-mentioned fluorine pump refrigeration system.

[0147] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A refrigeration fluorine pump characterized by, The application relates to a refrigerant pump, comprising: a shell, which comprises a shell side wall, a main liquid inlet and a main liquid outlet, the main liquid inlet and the main liquid outlet being arranged on two sides of the shell side wall along a first direction, the main liquid inlet being used for inputting refrigerant into the shell, and the main liquid outlet being used for outputting the refrigerant in the shell; a pump head arranged in the shell, the pump head comprising a pump head liquid inlet and a pump head liquid outlet, the pump head liquid inlet and the main liquid inlet being communicated through a first internal space, and the pump head liquid outlet and the main liquid outlet being communicated through a second internal space, the pump head being used for conveying the refrigerant in the first internal space to the second internal space; a bypass pipeline arranged outside the shell side wall, the bypass pipeline comprising a first pipeline part, the first pipeline part comprising a first pipeline branch and a second pipeline branch arranged in sequence along a direction from the main liquid inlet to the main liquid outlet, the first pipeline branch and the second pipeline branch extending along a second direction, one end of the first pipeline branch and one end of the second pipeline branch close to the shell side wall being communicated with the second internal space respectively, one end of the first pipeline branch away from the shell side wall being communicated with the second pipeline branch, one end of the second pipeline branch away from the shell side wall being communicated with the first internal space, and a cross-sectional dimension of the first pipeline branch along the first direction being greater than a cross-sectional dimension of the second pipeline branch along the first direction, the first direction and the second direction intersecting; a valve assembly arranged in the first pipeline part, the valve assembly comprising an elastic element and a movable valve plate, the elastic element being arranged at one end of the first pipeline branch away from the shell side wall, the movable valve plate being arranged in the second pipeline branch, one end of the elastic element being fixed to an inner wall of the first pipeline branch on a side close to the main liquid inlet along the first direction, the other end of the elastic element being fixedly connected with a side wall of the movable valve plate and applying a first preset force on the movable valve plate along the first direction from the main liquid outlet to the main liquid inlet, so that the movable valve plate moves to form a spacing space with an inner wall of the bypass pipeline, wherein the first preset force is equal in value and opposite in direction to a first preset pressure, the first preset pressure being a pressure of the refrigerant in the second internal space when the refrigerant pump operates at a first preset flow rate and a first preset lift.

2. The cryogenic fluorine pump of claim 1, wherein, When the operating flow rate of the refrigerant pump is greater than or equal to the first preset flow rate, and the operating lift of the refrigerant pump is greater than or equal to the first preset lift, the movable valve plate is sealingly connected with the inner wall of the bypass pipeline.

3. The refrigeration fluorine pump according to claim 1 or 2, characterized in that, When the operating flow rate of the refrigerant pump is less than the first preset flow rate, and the operating lift of the refrigerant pump is less than the first preset lift, the movable valve plate is translated along the first direction to the main liquid inlet under the driving of the elastic element, so that the spacing space is formed between the movable valve plate and the inner wall of the second pipeline branch.

4. The cryogenic fluorine pump according to claim 1 or 2, characterized in that, The bypass pipeline and the shell are integrally formed.

5. A fluorine pump refrigeration system characterized by, Comprise: A condenser, an evaporator, and a refrigeration fluorine pump connected between the condenser and the evaporator, wherein the refrigeration fluorine pump comprises: A shell comprising a shell side wall, a main liquid inlet and a main liquid outlet, the main liquid inlet and the main liquid outlet are arranged on both sides of the shell side wall along a first direction, the main liquid inlet is connected with the condenser, and the refrigerant output by the condenser is input into the shell through the main liquid inlet, the main liquid outlet is connected with the evaporator, and the refrigerant in the shell is output through the main liquid outlet; A pump head arranged in the shell, the pump head comprising a pump head liquid inlet and a pump head liquid outlet, the pump head liquid inlet and the main liquid inlet are communicated through a first internal space, the pump head liquid outlet and the main liquid outlet are communicated through a second internal space, and the pump head is used to transport the refrigerant in the first internal space to the second internal space; A bypass pipeline arranged outside the shell side wall, the bypass pipeline comprising a first pipeline part, the first pipeline part comprising a first pipeline branch and a second pipeline branch arranged in sequence along a direction from the main liquid inlet to the main liquid outlet, the first pipeline branch and the second pipeline branch extend along a second direction, one end of the first pipeline branch and the second pipeline branch close to the shell side wall is respectively communicated with the second internal space, one end of the first pipeline branch away from the shell side wall is communicated with the second pipeline branch, one end of the second pipeline branch away from the shell side wall is communicated with the first internal space, and the cross-sectional dimension of the first pipeline branch along the first direction is greater than that of the second pipeline branch along the first direction, and the first direction and the second direction intersect; A valve assembly arranged in the first pipeline part, the valve assembly comprising a resilient element and a movable valve plate, the resilient element is arranged at one end of the first pipeline branch away from the shell side wall, the movable valve plate is arranged in the second pipeline branch, one end of the resilient element is fixed to the inner wall of the first pipeline branch on the side close to the main liquid inlet along the first direction, the other end of the resilient element is fixedly connected with the side wall of the movable valve plate and applies a first pre-action force to the movable valve plate along the first direction from the main outlet to the main inlet, so that the movable valve plate moves and forms a spacing space with the inner wall of the bypass pipeline, wherein the first pre-action force is equal in value and opposite in direction to a first preset pressure, and the first preset pressure is the pressure exerted by the refrigerant in the second internal space on the movable valve plate when the refrigeration fluorine pump operates at a first preset flow rate and a first preset head.

6. The fluorine pump refrigeration system of claim 5, wherein, When the operating flow rate of the refrigeration fluorine pump is greater than or equal to the first preset flow rate, and the operating head of the refrigeration fluorine pump is greater than or equal to the first preset head, the movable valve plate is in sealing connection with the inner wall of the bypass pipeline.

7. The fluorine pump refrigeration system according to claim 5 or 6, wherein, When the running flow of the refrigeration fluorine pump is less than the first preset flow, and the running lift of the refrigeration fluorine pump is less than the first preset lift, under the driving of the elastic element, the movable valve plate translates along the first direction to the main liquid inlet, so that the movable valve plate and the inner wall of the second pipeline branch form the interval space.

Images