Liquid accumulator, compressor and air conditioning system

Abstract

The invention provides a liquid accumulator, a compressor and an air conditioning system. The liquid storage device comprises a liquid storage device shell, a liquid storage cavity is formed in the liquid storage device shell, and the liquid storage cavity comprises a first liquid storage cavity and a second liquid storage cavity which communicate with each other; the air inlet pipe is arranged at the top of the liquid storage device shell, the first liquid storage cavity communicates with the air inlet pipe, and the liquid storage cavity is used for conducting gas-liquid separation on the refrigerant entering from the air inlet pipe; the air outlet pipe is arranged at the bottom of the liquid storage device shell; the air outlet pipe comprises an inner pipe section extending into the second liquid storage cavity and an outer pipe section arranged on the outer side of the liquid storage cavity, and the inner pipe section is communicated with the outer pipe section; the dividing face between the first liquid storage cavity and the second liquid storage cavity is flush with the end face of the inner pipe section, and the gaseous refrigerant is discharged out of the liquid storage cavities through the inner pipe section and the outer pipe section in sequence. Wherein the effective volume of the second liquid storage cavity is A, the charge quantity of the R290 refrigerant is R, and A and R meet the condition that A / R is larger than or equal to 0.64 and smaller than or equal to 0.76. According to the liquid accumulator, the performance and efficiency of the compressor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a liquid accumulator, a compressor and an air conditioning system. BACKGROUND

[0002] The ODP (Ozone Depletion Potential) of propane (R290) is 0, and the GWP (Global Warming Potential) is 3, which is lower than that of the currently used refrigerant. Therefore, R290 is applied to air conditioning systems as a new environmentally friendly natural refrigerant. However, when using the liquid accumulator in the prior art to charge R290 refrigerant, there is a problem of small injection amount, which affects the operating efficiency and performance of the compressor, and further affects the performance of the air conditioning system. SUMMARY

[0003] In view of the problems in the prior art, the purpose of the present application is to provide a liquid accumulator, a compressor and an air conditioning system to improve the operating efficiency and performance of the compressor.

[0004] The present application provides a liquid accumulator for containing R290 refrigerant, comprising: a liquid accumulator housing, an inside of which is provided with a liquid storage cavity, the liquid storage cavity comprising a first liquid storage cavity and a second liquid storage cavity in communication with each other; an air inlet pipe provided at the top of the liquid accumulator housing, and the first liquid storage cavity is in communication with the air inlet pipe, and the liquid storage cavity is used for gas-liquid separation of the refrigerant entering from the air inlet pipe; an air outlet pipe provided at the bottom of the liquid accumulator housing; the air outlet pipe comprises an inner pipe section extending into the second liquid storage cavity and an outer pipe section provided outside the liquid storage cavity, and the inner pipe section and the outer pipe section are in communication; the partition surface between the first liquid storage cavity and the second liquid storage cavity is flush with the end surface of the inner pipe section, and the gaseous refrigerant is sequentially discharged from the liquid storage cavity through the inner pipe section and the outer pipe section; wherein the effective volume of the second liquid storage cavity is A, the charging amount of the R290 refrigerant is R, and A and R satisfy: 0.64≤A / R≤0.76.

[0005] In some embodiments, the air outlet pipe comprises a plurality of air outlet pipes, and the plurality of air outlet pipes are spaced apart at the bottom of the liquid accumulator housing, and the ports of the inner pipe sections of each air outlet pipe are flush.

[0006] In some embodiments, the plurality of inner pipe sections are spaced apart along the circumference of the liquid storage cavity.

[0007] In some embodiments, the inner pipe section is a straight pipe section extending along the axial direction of the liquid accumulator housing.

[0008] In some embodiments, a filter device is further included, which is arranged in the liquid storage cavity and between the gas inlet pipe and the gas outlet pipe.

[0009] In some embodiments, the filter device comprises a bracket and a filter screen, the bracket is arranged on the inner wall of the liquid storage cavity, and the filter screen is arranged on the bracket.

[0010] The embodiment of the present application further provides a compressor comprising the liquid accumulator.

[0011] In some embodiments, a compressor body is further included, which comprises a compressor shell and a motor and a compression mechanism arranged in the compressor shell. The liquid accumulator is arranged outside the compressor shell, and the gas outlet pipe of the liquid accumulator is in communication with the inner cavity of the compression mechanism.

[0012] In some embodiments, the compression mechanism comprises a cylinder, When the compression mechanism comprises a plurality of cylinders, the liquid accumulator is provided with a plurality of gas outlet pipes corresponding to the plurality of cylinders.

[0013] The embodiment of the present application further provides an air conditioning system comprising the compressor.

[0014] The liquid accumulator, the compressor and the air conditioning system provided by the present application have the following advantages: Through experiments, when the effective volume A of the second liquid storage cavity 12 of the liquid accumulator and the charging amount R of R290 satisfy 0.64≤A / R≤0.76, the use requirement of R290 gas-liquid separation can be met, and the working efficiency and performance of the compressor arranged in the liquid accumulator can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings.

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a liquid accumulator according to an embodiment of the present application.

[0017] Reference signs: DETAILED DESCRIPTION

[0018] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the several views and, as such, repeated description is omitted for clarity.

[0019] In the description of the present application, the expressions "one embodiment", "some embodiments", "example", "specific example" or "some examples" are used to generally indicate certain features, structures, materials, or characteristics included in at least one embodiment or example of the present application. Moreover, such expressions are not necessarily referring to the same embodiment or example. Furthermore, such expressions do not necessarily refer to the same embodiment or example, but are used to connect general described features, structures, materials, or characteristics to particular ones. In addition, it is to be noted that the features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples without necessarily having to be combined in the same embodiment or example, unless explicitly stated otherwise. It is also to be noted that the features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples without necessarily having to be combined in the same embodiment or example, unless explicitly stated otherwise.

[0020] Furthermore, the terms "first", "second", "third", "fourth", "fifth", "sixth", and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily presented chronologically. It is to be noted that, unless specifically stated otherwise, the person skilled in the art understands that the "first", "second", "third", "fourth", "fifth", "sixth" and the like are used designating the number of the similar elements and do not have to refer to a specific chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and embodiments.

[0021] It is further understood that the use of relational terms such as "first", "second", "third", "fourth", "fifth", "sixth", and the like, if any, are used solely to distinguish one from another entity or action without necessarily implying a chronological or sequential order, unless explicitly stated otherwise. It is to be understood that the terms so used are interchangeable under appropriate circumstances and embodiments.

[0022] In the prior art, the refrigerants used in air conditioning systems are generally R410A and R22, etc., but these refrigerants can destroy the ozone layer and produce greenhouse gases, damaging the environment. In order to improve the impact of refrigerants on the environment, more environmentally friendly refrigerant R290 is attracting more and more attention. However, the liquid density of R290 is quite different from that of R410 and R22, and when using the existing liquid accumulator for charging R410A and R22 to charge R290 refrigerant, the charging amount of R290 is small, resulting in low refrigerant flow, which affects the performance of the compressor and the air conditioning system.

[0023] To improve the problems in the prior art, an embodiment of the present application provides a liquid accumulator. Figure 1 The structure of the liquid accumulator provided by an embodiment of the present application is shown in a schematic diagram. As shown in the diagram, Figure 1 The liquid accumulator comprises: a liquid accumulator housing 10, which is internally provided with a liquid storage cavity, the liquid storage cavity comprising a first liquid storage cavity 11 and a second liquid storage cavity 12 in communication with each other; an air inlet pipe 20, which is arranged at the top of the liquid accumulator housing 10, and the first liquid storage cavity 11 is in communication with the air inlet pipe 20, the liquid storage cavity being used for gas-liquid separation of the refrigerant entering from the air inlet pipe 20; an air outlet pipe 30, which is arranged at the bottom of the liquid accumulator housing 10; the air outlet pipe 30 comprises an inner pipe section 31 extending into the second liquid storage cavity 12 and an outer pipe section 32 arranged outside the liquid storage cavity, the inner pipe section 31 being in communication with the outer pipe section 32; the partition surface between the first liquid storage cavity 11 and the second liquid storage cavity 12 is flush with the end surface of the inner pipe section 31, and the gaseous refrigerant is discharged from the liquid storage cavity in sequence through the inner pipe section 31 and the outer pipe section 32; wherein the effective volume of the second liquid storage cavity 12 is A, the charging amount of the R290 refrigerant is R, and A and R satisfy: 0.64≤A / R≤0.76.

[0024] The gas-liquid mixed refrigerant from the heat exchanger in the air conditioning system enters the liquid storage cavity through the air inlet pipe 20, and the gas-liquid refrigerant is preliminarily separated in the first liquid storage cavity by means of gravity and centrifugal force, and the liquid refrigerant sinks; the preliminarily separated gaseous refrigerant is further separated from the liquid refrigerant in the second liquid storage cavity, so as to ensure that the refrigerant entering the compressor is dry saturated vapor, and at the same time, the suction pressure of the compressor is stabilized, and the fluctuation of the refrigerant flow is avoided. If the effective volume of the second liquid storage cavity is too small, the liquid droplets remaining in the preliminarily separated gaseous refrigerant cannot be fully separated, and the liquid refrigerant is easy to enter the cylinder of the compressor along with the gaseous refrigerant, causing the risk of liquid knock; if the effective volume of the second liquid storage cavity is too large, the total amount of the refrigerant remaining in the liquid storage cavity is increased, the amount of the gaseous refrigerant entering the interior of the compressor is reduced, and the amount of the refrigerant participating in heat exchange in the air conditioning system is reduced. Therefore, the effective volume of the second liquid storage cavity and the charging amount of the refrigerant need to be reasonably set, so as to realize the reliability of the compressor operation, and not to affect the amount of the refrigerant participating in heat exchange in the air conditioning system. Through experiments, it is verified that when the effective volume A of the second liquid storage cavity 12 of the liquid accumulator and the charging amount R of the R290 satisfy 0.64≤A / R≤0.76, the use requirement of R290 gas-liquid separation can be met, and the working efficiency and performance of the compressor arranged in the above liquid accumulator can be ensured.

[0025] Further, Figure 1As shown, the liquid accumulator comprises one gas outlet pipe 30. However, in other embodiments, the gas outlet pipe 30 comprises a plurality of gas outlet pipes 30, which are spaced apart on the bottom of the liquid accumulator shell 10, and the ports of the inner pipe sections of the plurality of gas outlet pipes 30 are flush.

[0026] Further, preferably, the plurality of inner pipe sections are spaced apart along the circumference of the liquid accumulation cavity. The plurality of gas outlet pipes 30 are spaced apart along the circumference of the liquid accumulation cavity. In this way, the inner pipe sections of the gas outlet pipe 30 can simplify the process of assembling the gas outlet pipe 30.

[0027] Further, as shown, Figure 1 the inner pipe section is a straight pipe section extending along the axial direction of the liquid accumulator shell 10. By arranging the inner pipe section as a straight pipe section, the exhaust path of the refrigerant into the gas outlet pipe 30 can be reduced, the exhaust resistance can be reduced, and the exhaust efficiency can be improved.

[0028] Further, as shown, Figure 1 the liquid accumulator further comprises a filter device 40, which is arranged in the liquid accumulation cavity and between the gas inlet pipe 20 and the gas outlet pipe 30.

[0029] By arranging the filter device 40 in the liquid accumulation cavity and between the gas inlet pipe 20 and the gas outlet pipe 30, the refrigerant entering the liquid accumulation cavity is filtered by the filter device 40 before being discharged into the compression chamber of the compressor through the gas outlet pipe 30, which avoids impurities in the refrigerant from entering the compression chamber and damaging the compressor, and improves the reliability of the operation of the compressor.

[0030] Specifically, the filter device 40 comprises a bracket 42 and a filter screen 41, the bracket 42 is arranged on the inner wall of the liquid accumulation cavity, and the filter screen 41 is arranged on the bracket 42.

[0031] By arranging the filter device 40 to comprise the bracket 42 and the filter screen 41, the cost is low and the filtering effect is good.

[0032] Further, the embodiments of the present application also provide a compressor comprising the liquid accumulator as described above. Since the compressor provided by the embodiments of the present application comprises the liquid accumulator as described above, all the technical effects of the liquid accumulator can be achieved, which will not be described here.

[0033] Further, in some embodiments, the compressor further comprises a compressor body comprising a compressor shell and a motor and a compression mechanism arranged inside the compressor shell; the liquid accumulator is arranged outside the compressor shell, and the gas outlet pipe of the liquid accumulator is in communication with the inner cavity of the compression mechanism.

[0034] When the compressor is working, the motor drives the compression mechanism to work, the compression mechanism compresses the gaseous refrigerant sucked from the liquid accumulator, the gaseous refrigerant is discharged to the heat exchanger of the air conditioning system after being compressed to exchange heat, and then enters the liquid accumulator to perform a new round of compression, and so on, to perform a refrigeration cycle.

[0035] Further, in some embodiments, the compression mechanism includes a cylinder, and when the compression mechanism includes a plurality of cylinders, the liquid accumulator is provided with a plurality of gas outlet pipes 30 corresponding to the plurality of cylinders. By providing a plurality of gas outlet pipes 30 in the liquid accumulator and connecting them one by one with the cylinders, one liquid accumulator can be used for the working of multiple cylinders of the compressor, saving the number of liquid accumulators.

[0036] Further, the embodiment of the present application also provides an air conditioning system comprising the compressor as described above. Since the air conditioning system provided by the embodiment of the present application comprises the compressor as described above, all the technical effects of the compressor can be achieved, which will not be described here.

[0037] In summary, the liquid accumulator, the compressor and the air conditioning system provided by the present application have the following advantages: The gas-liquid mixed refrigerant from the heat exchanger of the air conditioning system enters the liquid storage cavity through the gas inlet pipe, and the gas-liquid refrigerant is preliminarily separated in the first liquid storage cavity by gravity and centrifugal force, and the liquid refrigerant sinks; the preliminarily separated gaseous refrigerant is further separated from the liquid refrigerant in the second liquid storage cavity, to ensure that the refrigerant entering the compressor is dry saturated vapor, and to stabilize the suction pressure of the compressor and avoid fluctuations in the refrigerant flow. If the effective volume of the second liquid storage cavity is too small, the liquid droplets remaining in the preliminarily separated gaseous refrigerant cannot be fully separated, and the liquid refrigerant is easy to enter the cylinder of the compressor with the gaseous refrigerant, causing the risk of liquid knock; if the effective volume of the second liquid storage cavity is too large, the total amount of refrigerant remaining in the liquid storage cavity will increase, the amount of gaseous refrigerant entering the compressor will decrease, and the amount of refrigerant participating in heat exchange in the air conditioning system will decrease. Therefore, the effective volume of the second liquid storage cavity and the charge amount of the refrigerant need to be reasonably set to realize the reliability of the compressor and not to affect the amount of refrigerant participating in heat exchange in the air conditioning system. Through experiments, it is verified that when the effective volume A of the second liquid storage cavity 12 of the liquid accumulator and the charge amount R of R290 satisfy 0.64≤A / R≤0.76, the use requirements of R290 gas-liquid separation can be met, and the working efficiency and performance of the compressor provided in the liquid accumulator can be ensured.

[0038] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the present application.

Claims

1. A liquid reservoir, characterized in that, For accommodating R290 refrigerant, including: A liquid reservoir housing has a liquid reservoir cavity inside, the liquid reservoir cavity including a first liquid reservoir cavity and a second liquid reservoir cavity that are interconnected; An air inlet pipe is located at the top of the liquid reservoir housing, and the first liquid storage chamber is connected to the air inlet pipe. The liquid storage chamber is used to perform gas-liquid separation on the refrigerant entering from the air inlet pipe. An outlet pipe is located at the bottom of the liquid reservoir housing; the outlet pipe includes an inner pipe section extending into the second liquid reservoir and an outer pipe section located outside the liquid reservoir, the inner pipe section and the outer pipe section being connected; the dividing surface between the first liquid reservoir and the second liquid reservoir is flush with the end face of the inner pipe section, and gaseous refrigerant is discharged from the liquid reservoir sequentially through the inner pipe section and the outer pipe section; Wherein, the effective volume of the second liquid storage chamber is A, the charge amount of the R290 refrigerant is R, and A and R satisfy the following condition: 0.64≤A / R≤0.

76.

2. The liquid reservoir according to claim 1, characterized in that, The vent pipes include multiple vent pipes, which are spaced apart at the bottom of the liquid reservoir housing, and the ports of the inner pipe sections of each vent pipe are flush.

3. The liquid reservoir according to claim 1, characterized in that, Multiple inner tube segments are distributed circumferentially along the liquid storage cavity.

4. The liquid reservoir according to claim 1, characterized in that, The inner pipe section is a straight pipe section extending axially along the housing of the liquid reservoir.

5. The liquid reservoir according to claim 1, characterized in that, It also includes a filter device, which is located in the liquid storage chamber and between the air inlet pipe and the air outlet pipe.

6. The liquid reservoir according to claim 5, characterized in that, The filtration device includes a support and a filter screen. The support is disposed on the inner wall of the liquid storage chamber, and the filter screen is disposed on the support.

7. A compressor, characterized in that, Includes the reservoir as described in any one of claims 1 to 6.

8. The compressor according to claim 7, characterized in that, It also includes a compressor body, including a compressor housing and a motor and compression mechanism disposed inside the compressor housing; The liquid reservoir is located outside the compressor housing, and the outlet pipe of the liquid reservoir is connected to the inner cavity of the compression mechanism.

9. The compressor according to claim 8, characterized in that, The compression mechanism includes a cylinder. When the compression mechanism includes multiple cylinders, the liquid reservoir is provided with multiple air outlet pipes that correspond one-to-one with the multiple cylinders.

10. An air conditioning system, characterized in that, Includes the compressor as described in claim 9.

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