Liquid accumulator and refrigerant pump comprising the same

Abstract

The application provides a liquid accumulator and a refrigerant pump comprising the same. The liquid accumulator is used in the refrigerant pump and comprises a cylinder body comprising a liquid storage cavity, a liquid return pipe comprising a first pipe section, a second pipe section and a third pipe section connected in sequence, the first pipe section being in communication with the liquid storage cavity, the third pipe section being in communication with a pump body, a first side of the second pipe section extending in a first direction parallel to a first side of the third pipe section and extending in a second direction towards the first pipe section to be connected with a first side of the first pipe section, a second side of the second pipe section extending in the first direction gradually higher than a second side of the third pipe section and extending in the second direction towards the first pipe section to be connected with a second side of the first pipe section, and an anti-vortex plate located in the interior of the liquid accumulator. The application reduces the cavitation and the generation of liquid refrigerant vortex through the arrangement of the second pipe section and the anti-vortex plate, and improves the working reliability of the refrigerant pump.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and more specifically to a liquid receiver and a refrigerant pump including the receiver. Background Technology

[0002] With the rapid development of the internet big data industry, data centers, as core facilities for data processing, storage, and transmission, are receiving increasing attention. To ensure the normal operation of computers within the data center, air conditioning systems are used to cool the computer rooms. Under the background of energy conservation and emission reduction policies, to reduce power consumption, refrigerant pump air conditioning systems are used to regulate the indoor temperature of the computer rooms. A refrigerant pump air conditioning system is a circulation system that uses a refrigerant pump to drive liquid refrigerant to complete the natural cooling process.

[0003] Currently, gear pumps and centrifugal pumps are the most common types of pumps that drive liquid refrigerant. However, these two types of pumps suffer from low efficiency and short service life. Furthermore, the saturation pressure of the liquid refrigerant at the pump inlet is low, making it prone to sudden drops in suction pressure. This causes the liquid refrigerant to flash into a gaseous state, generating bubbles. When these bubbles flow into the high-pressure zone with the liquid, they burst, and the liquid fills the bubble cavities, creating a localized high-speed, high-pressure impact that damages the pump. This phenomenon is called cavitation, and cavitation affects the pump's operational reliability. Excessive gaseous refrigerant can also clog the pump's inlet passage, leading to unstable flow and making it difficult for the refrigeration system to operate stably. Summary of the Invention

[0004] In view of the problems in the prior art, the purpose of the present invention is to provide a liquid receiver and a refrigerant pump including the receiver, so as to reduce the occurrence of cavitation, achieve stable delivery of liquid refrigerant, and improve the operational reliability of the refrigerant pump.

[0005] This invention provides a liquid receiver for use in a refrigerant pump, wherein the refrigerant pump includes a pump body, and the liquid receiver includes:

[0006] A cylindrical body, the cylindrical body including a liquid storage chamber for storing liquid refrigerant;

[0007] The return pipe includes a first section, a second section, and a third section connected in sequence. The first section is connected to the liquid storage chamber, and the third section is connected to the pump body. The first side of the second section extends parallel to the first side of the third section in a first direction and extends in a second direction toward the first section to connect with the first side of the first section. The second side of the second section extends gradually higher than the second side of the third section in the first direction and extends in the second direction toward the first section to connect with the second side of the first section.

[0008] A vortex-resistant plate is located inside the liquid reservoir.

[0009] In some embodiments, the second pipe segment includes a variable diameter section, the first side of which is parallel to the first side of the third pipe segment, the second side of which is higher than the second side of the third pipe segment, the length of the first side of which is L, the height of the second side of which is higher than the second side of the third pipe segment is H, and the range of H / L is greater than or equal to 1 / 20 and less than or equal to 1 / 10.

[0010] In some embodiments, the anti-vortex plate includes an annular plate and at least one strip structure passing through the center of the annular plate and having its two ends abutting against the inner wall of the annular plate.

[0011] In some embodiments, the first tube segment is perpendicular to the third tube segment.

[0012] In some embodiments, the first pipe segment and the third pipe segment are straight pipes.

[0013] This invention provides a refrigerant pump, including a pump body and a liquid receiver as described above, wherein the return pipe is connected to the pump body.

[0014] In some embodiments, the pump body includes a housing, a compression assembly, and a motor assembly, wherein the compression assembly and the motor assembly are located inside the housing, and the motor assembly is used to provide driving force to the compression assembly.

[0015] In some embodiments, the compression assembly includes a cylinder block, an upper cylinder head, a lower cylinder head, a crankshaft, and a piston; the upper cylinder head and the lower cylinder head are respectively located at both ends of the cylinder block, the crankshaft extends through both ends of the cylinder block, the piston is sleeved on the outside of the crankshaft and located inside the cylinder block; the motor assembly is connected to the crankshaft.

[0016] In some embodiments, the compression assembly includes a first cylinder, a second cylinder, and an intermediate plate located between the first cylinder and the second cylinder; the reservoir includes two return pipes, each of which is connected to one of the cylinders.

[0017] In some embodiments, the pump body includes a first cylinder, a second cylinder, and an intermediate plate located between the first cylinder and the second cylinder; the intermediate plate is provided with a through hole communicating with the first cylinder and the second cylinder, and the reservoir includes a return pipe connected to the through hole.

[0018] The liquid receiver and refrigerant pump including the present invention have the following advantages:

[0019] The second-section pipe reduces refrigerant pressure loss and the generation of gaseous refrigerant. Furthermore, the slope on the second side of the second-section pipe allows the gaseous refrigerant to return to the receiver and prevent it from entering the pump body. Therefore, the second-section pipe reduces the possibility of cavitation. At the same time, by installing an anti-vortex plate inside the receiver, vortices in the liquid refrigerant are prevented from being generated, which would affect the flow rate of the liquid refrigerant into the cylinder. Attached Figure Description

[0020] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of a refrigerant pump provided according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A magnified view of the area indicated by the circle;

[0023] Figure 3 yes Figure 2 A magnified view of the area indicated by the circle;

[0024] Figure 4 This is a schematic diagram of an anti-vortex plate provided in one embodiment of the invention;

[0025] Figure 5 This is a schematic diagram of an anti-vortex plate provided in another embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a compression component provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of a cylinder block provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of a compression component provided in another embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of a compression component provided in another embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of a pump body provided in another embodiment of the present invention.

[0031] Figure label:

[0032] 100 Pump body 200 Liquid receiver

[0033] 110 Shell 210 Cylinder

[0034] 120 Motor assembly 220 Return pipe

[0035] 130 Compression assembly 221 First section pipe

[0036] 131 Cylinder block 222 Second section pipe

[0037] 131a Suction chamber 222a Bend section

[0038] 131b Suction port; 222b Variable diameter section

[0039] 1311 First side of the variable diameter section of the first cylinder block b1

[0040] 1312 Second cylinder block b2, second side of the variable diameter section

[0041] 132 Upper cylinder head 223 Third section pipe

[0042] 133 Lower cylinder head 300 anti-vortex plate

[0043] 134 Crankshaft 310 Annular Plate

[0044] 135 piston 320 strip structure

[0045] 136 Intermediate plate 140 Drain pipe

[0046] 1361 Through Hole Detailed Implementation

[0047] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0048] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0049] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0051] like Figures 1 to 3 As shown, an embodiment of the present invention provides a liquid receiver for use in a refrigerant pump. The liquid receiver 200 includes a cylinder 210, a return pipe 220, and an anti-vortex plate 300.

[0052] Specifically, the cylinder 210 includes a liquid storage chamber 211 for storing liquid refrigerant. The return pipe 220 includes a first section 221, a second section 222, and a third section 223 connected in sequence. The first section 221 communicates with the liquid storage chamber 211, and the third section 223 communicates with the pump body. The first side of the second section 222 extends parallel to the first side of the third section 223 in a first direction and extends in a second direction toward the first section 221 to connect with the first side of the first section 221. The second side of the second section 222 extends gradually higher than the second side of the third section 223 in the first direction and extends in the second direction toward the first section 221 to connect with the second side of the first section 221. The anti-vortex plate 300 is located inside the liquid receiver 200. Here, the first direction is the left-right direction as seen on paper, and the second direction is the up-down direction as seen on paper.

[0053] Liquid refrigerant re-enters the pump body 100 via the return pipe 220 of the receiver 200. The second section 222 of the return pipe 220 reduces turbulence and vortices generated when the liquid refrigerant passes through, reducing pressure loss and thus reducing the generation of gaseous refrigerant. Furthermore, the gaseous refrigerant returns to the receiver chamber 211 due to the slope on the second side of the second section 222, preventing it from entering the pump body. Therefore, the second section 222 reduces the possibility of cavitation. By installing an anti-vortex plate 300 inside the receiver 200, vortices in the liquid refrigerant are prevented from affecting the flow rate of the liquid refrigerant into the cylinder. The second section 222 and the anti-vortex plate 300 improve the operational reliability of the refrigerant pump.

[0054] Furthermore, such as Figure 2 As shown, the second pipe section 222 includes a bend 222a with a uniform diameter and a reducer 222b with a varying diameter. The bend 222a and the reducer 222b are eccentrically arranged, therefore the second pipe section 222 is an eccentric reducer. The first side of the reducer 222b is parallel to the first side of the third pipe section 223, and the second side of the reducer 222b is higher than the second side of the third pipe section 223. The length of the first side b1 of the reducer 222b is L, and the height of the second side b2 of the reducer 222b above the second side of the third pipe section 223 is H. The range of H / L is greater than or equal to 1 / 20 and less than or equal to 1 / 10. For example, H / L can be 1 / 18, 1 / 16, 1 / 14, or 1 / 12.

[0055] Please continue reading. Figure 2 and Figure 3 The anti-vortex plate 300 is disposed inside the first section pipe 221. Preferably, the end of the anti-vortex plate 300 communicating with the liquid storage chamber 211 has a small protrusion radially outward, which abuts against the end of the first section pipe 221 communicating with the liquid storage chamber 211, preventing the anti-vortex plate 300 from being pressed too deeply into the first section pipe 221. Specifically, the anti-vortex plate 300 can be fixed to the first section pipe 221 by welding. The anti-vortex plate 300 is used to prevent the liquid refrigerant entering the pump body 100 from generating vortices, thereby reducing the flow rate entering the pump body 100. The number of anti-vortex plates 300 can be greater than or equal to one, depending on actual needs. Figure 4 and Figure 5 As shown, in some embodiments, the anti-vortex plate 300 includes an annular plate 310 and at least one strip structure 320, the strip structure 320 passing through the center of the annular plate 310 and having its two ends abutting against the inner wall of the annular plate 310. Figure 4 As shown, the anti-vortex plate 300 includes an annular plate 310 and a strip structure 320 passing through the center of the annular plate 310. Figure 5As shown, the anti-vortex plate 30 includes an annular plate 310 and two strip structures 320 passing through the center of the annular plate 310, the two strip structures 320 being perpendicular to each other. The structure of the anti-vortex plate 30 is not limited to the structure shown above, and those skilled in the art can configure the structure of the anti-vortex plate according to actual needs.

[0056] Furthermore, such as Figure 2 As shown, the first tube segment 221 is perpendicular to the third tube segment 223. From the figure, the first tube segment 221 is located in the vertical direction as seen from the paper, and the second tube segment 222 is located in the horizontal direction as seen from the paper.

[0057] In some embodiments, the first pipe segment 221 and the third pipe segment 223 are straight pipes, but the first pipe segment 221 and the third pipe segment 223 can also be configured as other types of pipes according to actual needs.

[0058] This invention also provides a refrigerant pump, including the liquid receiver described above. Figure 1 As shown, the refrigerant pump includes a pump body 100 and a liquid receiver 200 as described above, with a return pipe 220 connected to the pump body 100. The refrigerant pump achieves all the technical benefits of the aforementioned liquid receiver, which will not be elaborated further here.

[0059] like Figure 1 As shown, the pump body 100 includes a housing 110, a motor assembly 120 located inside the housing 110, and a compression assembly 130, wherein the motor assembly 120 provides driving force to the compression assembly 130. The motor assembly 120 includes a stator 121 and a rotor 122, the rotor 122 being coaxially arranged with the stator and located inside the stator. When current is applied to the stator 121, the rotating magnetic field generated by the stator 121 can drive the rotor to rotate.

[0060] Please see Figure 6 The compression assembly 130 includes a cylinder block 131, an upper cylinder head 132, a lower cylinder head 133, a crankshaft 134, and a piston 135. The upper cylinder head 132 and the lower cylinder head 133 are located at both ends of the cylinder block 131, the crankshaft 134 extends through both ends of the cylinder block 131, and the piston 135 is sleeved on the outside of the crankshaft 134 and located inside the cylinder block 131. The rotor of the motor assembly 120 is connected to the crankshaft 134 to drive the crankshaft 134 to rotate.

[0061] like Figure 6 and Figure 7As shown, in some embodiments, the outer circumferences of the cylinder block 131, upper cylinder head 132, lower cylinder head 133, and piston 135 form a crescent-shaped working chamber. Driven by the motor assembly 120, the crankshaft 134 drives the piston 135 to rotate eccentrically within the working chamber, dividing the working chamber into an intake chamber 131a and an exhaust chamber (not shown in the figure). The exhaust chamber is connected to the drain pipe 140 of the pump body 100 to discharge the pressurized refrigerant. The intake chamber 131a is connected to the return pipe 220 of the liquid receiver 200 through the suction port 131b to periodically draw in refrigerant.

[0062] like Figure 8 and Figure 9 As shown, the compression assembly includes two cylinders, meaning the refrigerant pump is a twin-cylinder refrigerant pump. Specifically, as... Figure 8 As shown, in one embodiment, the compression assembly includes a first cylinder 1311, a second cylinder 1312, and an intermediate plate 136 located between the first cylinder 1311 and the second cylinder 1312; each cylinder 131 includes a suction port, therefore the compression assembly requires the reservoir 200 to include two return pipes 220, each return pipe 220 corresponding to and connected to the suction port of a cylinder 131. The specific structure of the cylinder 131 can be found in [reference needed]. Figure 7 The structure shown will not be elaborated upon here.

[0063] like Figure 9 As shown, in another embodiment, an intermediate plate 136 is provided between the second cylinders 1312; the intermediate plate 136 is provided with a through hole connecting the first cylinder 1311 and the second cylinder 1312, and the liquid reservoir 200 includes a return pipe 220, which is connected to the through hole 1361 to provide refrigerant to the two cylinders. The cylinders in this embodiment can be referenced... Figure 10 The cylinder 131 is shown. The working principle of the dual-cylinder refrigerant pump is the same as that of the single-cylinder refrigerant pump, and will not be repeated here.

[0064] The liquid receiver and refrigerant pump including the present invention have the following advantages:

[0065] By using an eccentric reducer bend in the return pipe of the receiver, pressure loss during liquid refrigerant flow is reduced, as is the generation of gaseous refrigerant. Furthermore, the gaseous refrigerant is deflected back into the receiver chamber by the slope on the second side of the second section of the pipe, preventing it from entering the pump body. Therefore, the second section of the pipe reduces the likelihood of cavitation. Additionally, an anti-vortex plate inside the receiver prevents vortex formation in the liquid refrigerant, thus avoiding any impact on the flow rate of liquid refrigerant entering the pump body. The eccentric reducer and anti-vortex plate improve the operational reliability of the refrigerant pump.

[0066] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A liquid accumulator applied to a refrigerant pump including a pump body, characterized by, The liquid accumulator comprises: a cylinder body comprising a liquid storage cavity for storing liquid refrigerant; a liquid return pipe comprising a first pipe section, a second pipe section and a third pipe section connected in sequence, the first pipe section being in communication with the liquid storage cavity, the third pipe section being in communication with the pump body; the second pipe section comprising a bend pipe section with uniform diameter and a variable diameter section with changing diameter, the bottom side of the second pipe section extending in a first direction parallel to the bottom side of the third pipe section, and then extending in a second direction towards the first pipe section to be connected to the right side of the first pipe section, the top side of the second pipe section extending in the first direction gradually higher than the top side of the third pipe section, and then extending in the second direction towards the first pipe section to be connected to the left side of the first pipe section; the first direction being perpendicular to the second direction; and a vortex prevention plate located inside the liquid accumulator.

2. The reservoir of claim 1, wherein, The bottom side of the variable diameter section is parallel to the bottom side of the third pipe section, the top side of the variable diameter section is higher than the top side of the third pipe section, the length of the bottom side of the variable diameter section is L, the height of the top side of the variable diameter section higher than the top side of the third pipe section is H, and the range of H / L is greater than or equal to 1 / 20 and less than or equal to 1 / 10.

3. The reservoir of claim 1, wherein, The vortex prevention plate comprises an annular plate and at least one strip-shaped structure passing through the center of the annular plate and abutting against the inner wall of the annular plate at both ends.

4. The reservoir of claim 1, wherein, The first pipe section is perpendicular to the third pipe section.

5. The reservoir of claim 1, wherein, The first pipe section and the third pipe section are straight pipes.

6. A refrigerant pump characterized by comprising: The pump body comprises a housing, a compression assembly and a motor assembly, the compression assembly and the motor assembly being located inside the housing, and the motor assembly being used to provide driving force for the compression assembly.

7. The refrigerant pump of claim 6, wherein, The compression assembly comprises a cylinder body, an upper cylinder cover, a lower cylinder cover, a crankshaft and a piston; the upper cylinder cover and the lower cylinder cover are respectively located at both ends of the cylinder body, the crankshaft passes through the cylinder body at both ends, the piston is sleeved outside the crankshaft and located inside the cylinder body; and the motor assembly is connected with the crankshaft.

8. The refrigerant pump of claim 7, wherein, The compression assembly comprises a first cylinder body, a second cylinder body and an intermediate plate located between the first cylinder body and the second cylinder body; the liquid accumulator comprises two liquid return pipes, each of which is in communication with a cylinder body.

9. The refrigerant pump of claim 8, wherein, The pump body comprises a first cylinder body, a second cylinder body and an intermediate plate located between the first cylinder body and the second cylinder body; the intermediate plate is provided with a through hole in communication with the first cylinder body and the second cylinder body, and the liquid accumulator comprises one liquid return pipe in communication with the through hole.

10. The refrigerant pump of claim 8, wherein, ​

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