Reservoir and refrigerant pump including same

Abstract

The invention provides a liquid accumulator and a refrigerant pump including the same. The liquid storage device is used in the refrigerant pump and comprises a barrel body, a liquid storage cavity and a liquid storage cavity, the liquid return pipe comprises a first-section pipe, a second-section pipe and a third-section pipe which are connected in sequence, the first-section pipe is communicated with the liquid storage cavity, and the third-section pipe is communicated with the pump body; the first side of the second pipe section extends in the first direction parallel to the first side of the third pipe section and extends in the direction of the first pipe section in the second direction so as to be connected with the first side of the first pipe section, and the second side of the second pipe section extends in the first direction gradually higher than the second side of the third pipe section and extends in the direction of the first pipe section in the second direction. The first section pipe is connected with the second side of the first section pipe; and the anti-vortex plate is positioned in the liquid storage device. Through the arrangement of the second section pipe and the anti-vortex plate, the cavitation phenomenon and the generation of liquid refrigerant vortex are reduced, and the working reliability of the refrigerant pump is improved.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a liquid accumulator and a refrigerant pump comprising the same. Background Art

[0002] With the rapid development of the Internet big data industry, data centers, as core facilities for data processing, storage and transmission, are also receiving more and more attention. To ensure the normal operation of computers in the data center, an air conditioning system is used to dissipate heat inside the computer room where the computers are stored. Under the background of energy conservation and emission reduction policies, in order to reduce power consumption, a fluorine pump air conditioning system is used to control the indoor temperature of the computer room. The fluorine pump air conditioning system is a circulation system that uses a fluorine pump to push the liquid refrigerant to complete the natural cooling refrigeration process.

[0003] At present, the fluorine pumps that drive liquid refrigerants mainly use gear pumps and centrifugal pumps. However, these two pumps have problems such as low efficiency and short service life. In addition, the saturation pressure of the liquid refrigerant at the pump inlet is low, and the suction pressure is prone to sudden drop. The liquid refrigerant flashes into gas and produces bubbles. When the bubbles flow into the high-pressure area with the liquid, the bubbles burst, and the liquid fills the bubble cavity, generating a local high-speed and high-pressure impact force, which damages the pump. This phenomenon is called cavitation. Cavitation will affect the working reliability of the pump. In addition, excessive gaseous refrigerant is easy to block the pump inlet channel, resulting in 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 object of the present invention is to provide a liquid storage device and a refrigerant pump including the same, so as to reduce the occurrence of cavitation, achieve stable delivery of liquid refrigerant, and improve the operating reliability of the refrigerant pump.

[0005] An embodiment of the present invention provides a liquid accumulator, which is applied to a refrigerant pump. The refrigerant pump includes a pump body, and the liquid accumulator includes:

[0006] A cylinder, the cylinder comprising a liquid storage cavity for storing liquid refrigerant;

[0007] The liquid return pipe comprises a first pipe section, a second pipe section and a third pipe section which are connected in sequence, wherein the first pipe section is communicated with the liquid storage chamber, and the third pipe section is communicated with the pump body; the first side of the second pipe section extends in a first direction in parallel with the first side of the third pipe section, and extends along a second direction toward the first pipe section to connect with the first side of the first pipe section, and the second side of the second pipe section extends in the first direction in a direction gradually higher than the second side of the third pipe section, and extends along the second direction toward the first pipe section to connect with the second side of the first pipe section;

[0008] The anti-vortex plate is located inside the liquid reservoir.

[0009] In some embodiments, the second section of the tube includes a reducing portion, a first side of the reducing portion is parallel to the first side of the third section of the tube, a second side of the reducing portion is higher than the second side of the third section of the tube, a length of the first side of the reducing portion is L, a height of the second side of the reducing portion higher than the second side of the third section of the tube 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, wherein the strip structure passes through the center of the annular plate, and two ends of the strip structure abut against the inner wall of the annular plate.

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

[0012] In some embodiments, the first section of the tube and the third section of the tube are straight tubes.

[0013] An embodiment of the present invention provides a refrigerant pump, comprising a pump body and the liquid accumulator as described above, wherein the liquid 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. The compression assembly and the motor assembly are located inside the housing, and the motor assembly is used to provide driving force for the compression assembly.

[0015] In some embodiments, the compression assembly includes a cylinder body, 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 the two ends of the cylinder body, the crankshaft passes through the crankshafts at the two ends of the cylinder body, the piston is sleeved on the outside of the crankshaft and is located inside the cylinder body; the motor assembly is connected to the crankshaft.

[0016] In some embodiments, the compression assembly includes 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 reservoir includes two liquid return pipes, and each liquid return pipe is connected to one of the cylinder bodies.

[0017] In some embodiments, the pump body includes 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 connecting the first cylinder body and the second cylinder body, and the liquid reservoir includes a return liquid pipe, which is connected to the through hole.

[0018] The liquid accumulator and the refrigerant pump including the same provided by the present invention have the following advantages:

[0019] The arrangement of the second section of the pipe can reduce the pressure loss of the refrigerant and the generation of gaseous refrigerant, and the gaseous refrigerant can be returned to the inside of the liquid reservoir under the obstruction of the slope of the second side of the second section of the pipe, and will not enter the inside of the pump body. Therefore, the arrangement of the second section of the pipe can reduce the possibility of cavitation. At the same time, by arranging an anti-vortex plate inside the liquid reservoir, the liquid refrigerant is prevented from generating vortices, which affects the flow rate of the liquid refrigerant entering the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 2 yes Figure 1 Enlarged view of the location indicated by the circle;

[0023] Figure 3 yes Figure 2 Enlarged view of the location indicated by the circle;

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

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

[0026] Figure 6 is a schematic diagram of a compression assembly provided by an embodiment of the present invention;

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

[0028] Figure 8 is a schematic diagram of a compression assembly provided by another embodiment of the present invention;

[0029] Fig. 9 is a schematic diagram of a compression assembly provided by another embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of a pump body provided by another embodiment of the present invention.

[0031] Reference numerals:

[0032] 100 Pump body 200 Liquid reservoir

[0033] 110 Shell 210 Cylinder

[0034] 120 Motor assembly 220 Liquid return pipe

[0035] 130 compression assembly 221 first section of pipe

[0036] 131 cylinder 222 second section pipe

[0037] 131a Suction chamber 222a Bend pipe

[0038] 131b Liquid suction port 222b Reduced diameter portion

[0039] 1311 First cylinder b1 First side of the reducing portion

[0040] 1312 Second cylinder b2 Second side of the diameter reducing portion

[0041] 132 Upper cylinder head 223 Third section pipe

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

[0043] 134 Crankshaft 310 Ring plate

[0044] 135 piston 320 bar structure

[0045] 136 Intermediate plate 140 Drain pipe

[0046] 1361 Through Hole DETAILED DESCRIPTION

[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0048] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] It should be further understood that the terms "comprises" and "includes" indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, 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" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the 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 accumulator for use in a refrigerant pump. The liquid accumulator 200 includes a cylinder 210 , a liquid 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 liquid return pipe 220 includes a first section pipe 221, a second section pipe 222 and a third section pipe 223 connected in sequence. The first section pipe 221 is connected to the liquid storage chamber 211, the third section pipe 223 is connected to the pump body, the first side of the second section pipe 222 extends in a first direction parallel to the first side of the third section pipe 223, and extends in a second direction toward the first section pipe 221 to connect with the first side of the first section pipe 221, the second side of the second section pipe 222 extends in a first direction gradually higher than the second side of the third section pipe 223, and extends in a second direction toward the first section pipe 221 to connect with the second side of the first section pipe 221. The anti-vortex plate 300 is located inside the liquid reservoir 200. Here, the first direction is the left-right direction as viewed on the paper, and the second direction is the up-down direction as viewed on the paper.

[0053] The liquid refrigerant re-enters the pump body 100 through the return pipe 220 of the liquid storage tank 200. The second section 222 of the return pipe 220 can reduce the turbulence and vortex generated when the liquid refrigerant passes through, reduce the pressure loss of the liquid refrigerant, and thus reduce the generation of gaseous refrigerant. The gaseous refrigerant will return to the liquid storage chamber 211 under the obstruction of the slope of the second side of the second section 222, and will not enter the pump body. Therefore, the setting of the second section 222 can reduce the possibility of cavitation problems. By setting an anti-vortex plate 300 inside the liquid storage tank 200, the liquid refrigerant is prevented from generating vortices, which affects the flow rate of the liquid refrigerant entering the cylinder body. The setting of the second section 222 and the anti-vortex plate 300 improves the working reliability of the refrigerant pump.

[0054] Furthermore, if Figure 2 As shown, the second section pipe 222 includes a curved pipe portion 222a with a uniform diameter and a reducing portion 222b with a variable diameter. The curved pipe portion 222a and the reducing portion 222b are eccentrically arranged, so the second section pipe 222 is an eccentric reducing pipe. The first side of the reducing portion 222b is parallel to the first side of the third section pipe 223, the second side of the reducing portion 222b is higher than the second side of the third section pipe 223, the length of the first side b1 of the reducing portion 222b is L, the height of the second side b2 of the reducing portion 222b higher than the second side of the third section pipe 223 is H, and the range of H / L is greater than or equal to 1 / 20 and less than or equal to 1 / 10. Exemplarily, H / L can be 1 / 18, 1 / 16, 1 / 14, 1 / 12.

[0055] Please continue reading Figure 2 and Figure 3 , the anti-vortex plate 300 is arranged inside the first section of the tube 221. Preferably, one end of the anti-vortex plate 300 connected to the liquid storage chamber 211 is radially provided with a small boss to abut against one end of the first section of the tube 221 connected to the liquid storage chamber 211, so as to prevent the anti-vortex plate 300 from being pressed too deeply into the first section of the tube 221. The anti-vortex plate 300 can be fixed to the first section of the tube 221 by welding. The anti-vortex plate 30 is used to prevent the liquid refrigerant entering the inlet of 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 1, and is specifically set according to 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 passes through the center of the annular plate 310, and its two ends abut 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, and the two strip structures 320 are 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 set the structure of the anti-vortex plate according to actual needs.

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

[0057] In some embodiments, the first section of the tube 221 and the third section of the tube 223 are straight tubes, but the first section of the tube 221 and the third section of the tube 223 can also be configured as other forms of tubes according to actual needs.

[0058] The embodiment of the present invention further provides a refrigerant pump, comprising the liquid storage device as described above. Figure 1 As shown, the refrigerant pump comprises a pump body 100 and the above-mentioned liquid accumulator 200, and the liquid return pipe 220 is connected to the pump body 100. The refrigerant pump can achieve all the technical effects of the above-mentioned liquid accumulator, which will not be described in detail here.

[0059] like Figure 1 As shown, the pump body 100 includes a housing 110, a motor assembly 120 and a compression assembly 130 located inside the housing 110, wherein the motor assembly 120 is used to provide driving force for the compression assembly 130. The motor assembly 120 includes a stator 121 and a rotor 122, and the rotor 122 is 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] See also Figure 6 The compression assembly 130 includes a cylinder body 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 respectively located at the two ends of the cylinder body 131, the crankshaft 134 is passed through the two ends of the cylinder body 131, and the piston 135 is sleeved on the outside of the crankshaft 134 and is located inside the cylinder body 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 circles of the cylinder body 131, the upper cylinder cover 132, the lower cylinder cover 133 and the piston 135 form a crescent-shaped working chamber. Driven by the motor assembly 120, the crankshaft 134 drives the piston 135 to rotate eccentrically in the working chamber, dividing the working chamber into a suction chamber 131a and a discharge chamber (not shown in the figure), the discharge chamber is connected to the discharge pipe 140 of the pump body 100 to discharge the pressurized refrigerant, and the suction chamber 131a is connected to the return pipe 220 of the liquid storage tank 200 through the suction port 131b to periodically and repeatedly inhale the refrigerant.

[0062] like Figure 8 and Fig. 9 As shown, the compression assembly includes two cylinders, that is, the refrigerant pump is a double-cylinder refrigerant pump. Figure 8 As shown, in one embodiment, the compression assembly includes a first cylinder body 1311, a second cylinder body 1312 and an intermediate plate 136 located between the first cylinder body 1311 and the second cylinder body 1312; each cylinder body 131 includes a liquid suction port, so the compression assembly requires the liquid reservoir 200 to include two liquid return pipes 220, each liquid return pipe 220 correspondingly connected to a liquid suction port of a cylinder body 131. The specific structure of the cylinder body 131 can be referred to Figure 7 The structure shown is not described in detail here.

[0063] like Fig. 9 As shown, in another embodiment, the middle plate 136 between the second cylinder 1312; the middle plate 136 is provided with a through hole connecting the first cylinder 1311 and the second cylinder 1312, and the liquid storage device 200 includes a liquid return pipe 220, which is connected to the through hole 1361 to provide refrigerant for the two cylinders. The cylinder in this embodiment can refer to Fig.10 The cylinder body 131 shown. The working principle of the double-cylinder refrigerant pump is the same as that of the single-cylinder refrigerant pump, which will not be described in detail here.

[0064] The liquid accumulator and the refrigerant pump including the same provided by the present invention have the following advantages:

[0065] By setting an eccentric reducing bend pipe in the return pipe of the liquid storage device, the pressure loss of the liquid refrigerant when passing through can be reduced, and the generation of gaseous refrigerant can be reduced. The gaseous refrigerant will return to the liquid storage cavity under the slope of the second side of the second pipe section and will not enter the pump body. Therefore, the setting of the second pipe section can reduce the possibility of cavitation problems. In addition, by setting an anti-vortex plate inside the liquid storage device, the liquid refrigerant is prevented from generating vortices, which affects the flow rate of the liquid refrigerant entering the cylinder body. The setting of the eccentric reducing pipe and the anti-vortex plate improves the working reliability of the refrigerant pump.

[0066] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A liquid accumulator, used in a refrigerant pump, the refrigerant pump comprising a pump body, characterized in that: The liquid reservoir comprises: A cylinder, the cylinder comprising a liquid storage cavity for storing liquid refrigerant; The liquid return pipe includes a first section pipe, a second section pipe and a third section pipe which are connected in sequence, the first section pipe is connected to the liquid storage chamber, and the third section pipe is connected to the pump body; the first side of the second section pipe extends in a first direction parallel to the first side of the third section pipe, and extends along the second direction toward the first section pipe to be connected to the first side of the first section pipe, the second side of the second section pipe extends in the first direction gradually higher than the second side of the third section pipe, and extends along the second direction toward the first section pipe to be connected to the second side of the first section pipe; the anti-vortex plate is located inside the liquid reservoir.

2. The liquid storage device according to claim 1, characterized in that: The second section of the tube includes a reducing portion, a first side of the reducing portion is parallel to the first side of the third section of the tube, a second side of the reducing portion is higher than the second side of the third section of the tube, a length of the first side of the reducing portion is L, a height of the second side of the reducing portion higher than the second side of the third section of the tube is H, and a range of H / L is greater than or equal to 1 / 20 and less than or equal to 1 / 10.

3. The liquid storage device according to claim 1, characterized in that: The anti-vortex plate comprises an annular plate and at least one strip structure, wherein the strip structure passes through the center of the annular plate, and two ends of the strip structure abut against the inner wall of the annular plate.

4. The liquid reservoir according to claim 1, characterized in that The first section of the tube is perpendicular to the third section of the tube.

5. The liquid storage device according to claim 1, characterized in that: The first section of the pipe and the third section of the pipe are straight pipes.

6. A refrigerant pump, characterized in that: It comprises a pump body and a liquid reservoir as claimed in any one of claims 1 to 5, wherein the liquid return pipe is connected to the pump body.

7. The refrigerant pump according to claim 6, characterized in that: The pump body comprises a shell, a compression assembly and a motor assembly. The compression assembly and the motor assembly are located inside the shell. The motor assembly is used to provide driving force for the compression assembly.

8. The refrigerant pump according to claim 7, characterized in that: The compression assembly includes a cylinder body, 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 the two ends of the cylinder body, the crankshaft passes through the crankshafts at the two ends of the cylinder body, the piston is sleeved on the outside of the crankshaft and is located inside the cylinder body; the motor assembly is connected to the crankshaft.

9. The refrigerant pump according to claim 8, characterized in that The compression assembly includes 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 reservoir includes two liquid return pipes, and each of the liquid return pipes is connected to one of the cylinder bodies.

10. The refrigerant pump according to claim 8, characterized in that The pump body includes 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 connecting the first cylinder body and the second cylinder body, and the liquid reservoir includes a return pipe, which is connected to the through hole.

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