Compressor air inlet assembly and refrigerating system

Abstract

The utility model provides an air inlet assembly of a compressor and a refrigerating system. The air inlet assembly of the compressor comprises a compressor body, a first pipe; the gas-liquid separator communicates with the compressor body through a first pipeline, the gas-liquid separator comprises a shell, a second pipeline, a filter screen and an air inlet pipe, the second pipeline is connected with the shell and used for sucking a refrigerant into the shell, the air inlet pipe is located in the shell, an inlet of the air inlet pipe faces the second pipeline, an outlet of the air inlet pipe communicates with the first pipeline, and the air inlet pipe is a taper pipe; the large-diameter end of the taper pipe is the inlet end of the air inlet pipe, the filter screen is installed in the shell and located between the air inlet pipe and the second pipeline, and a gap is reserved between the inlet end of the air inlet pipe and the filter screen. The flow resistance loss of the whole refrigerating system can be reduced, the pressure pulsation of the compressor is reduced, the influence of the pressure pulsation is optimized, the flow of a low-density refrigerant can be greatly improved, and the problem that the increasing amplitude of the refrigerating capacity is small or even the refrigerating capacity cannot be increased along with the increasing of the rotating speed of the compressor is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, especially a compressor air intake subassembly and refrigerating system. BACKGROUND

[0002] Refrigerant, also known as refrigerant or snow species, is a kind of working fluid used for transferring heat energy and producing freezing effect in freezing and air conditioning systems. Under the big environment of energy saving and emission reduction, refrigerant replacement has become an inevitable trend, the main reason is that traditional refrigerants such as HFCs (hydrofluorocarbons) have greater impact on the environment, and need to be replaced by more environmentally friendly refrigerants, and the replacement process of refrigerants is like a broken bamboo. The replacement refrigerant with low global warming potential has the advantages of high efficiency cooling, low energy consumption, environmental protection and the like. With the intensification of global climate change, the replacement refrigerant with low GWP (global warming potential) has become an important development direction of refrigeration technology.

[0003] At present, the replacement refrigerant with low global warming potential generally has the characteristics of low density and low volumetric refrigeration capacity. Volumetric refrigeration capacity refers to the cooling capacity that a refrigeration compressor can produce per unit time when 1 cubic meter of refrigerant vapor is sucked in. Therefore, if the replacement refrigerant with low global warming potential needs to achieve the same refrigeration capacity as the traditional refrigerant, the compressor often means greater displacement and greater volumetric flow. A common problem brought by greater displacement and greater volumetric flow is that the fluid often has a higher flow rate at various parts of the air conditioning system, and high flow rate brings negative effects on performance. The first is that the flow resistance loss of the compressor is large, and the second negative effect is that the pressure pulsation of the compressor is large. These two aspects will cause the flow resistance of the low-density refrigerant to increase, and with the increase of the rotating speed of the compressor, the refrigeration capacity cannot be effectively improved, and even the refrigeration capacity may decrease due to excessive flow resistance, as shown in Figure 1 , Figure 1 The abscissa in Figure 1 is the working frequency of the compressor, and the working frequency of the compressor is directly related to the rotating speed of the compressor. The higher the working frequency, the faster the rotating speed of the compressor. Therefore, it can be known from that the refrigeration capacity will decrease when the rotating speed of the compressor increases to a certain extent. SUMMARY

[0004] The utility model aims at providing a compressor air intake subassembly and refrigerating system, which can effectively reduce the flow resistance loss of the whole refrigerating system, reduce the pressure pulsation of the compressor, optimize the influence of pressure pulsation, and is especially suitable for the refrigerating system using low-density refrigerant, can greatly improve the flow of low-density refrigerant, and solve the problem that the refrigeration capacity cannot be improved or is improved to a small extent with the increase of the rotating speed of the compressor.

[0005] In order to achieve the above purpose, the utility model provides a compressor air intake subassembly, which comprises:

[0006] compressor body;

[0007] first pipe;

[0008] a gas-liquid separator, which is in communication with the compressor body through the first pipe, the gas-liquid separator comprising a shell, a second pipe, a filter screen and an inlet pipe, the second pipe being connected with the shell for sucking refrigerant into the shell, the inlet pipe being located in the shell and having an inlet end facing the second pipe, the inlet pipe having an outlet end in communication with the first pipe, the inlet pipe being a tapered pipe, the large-diameter end of the tapered pipe being the inlet end of the inlet pipe, the filter screen being installed in the shell and located between the inlet pipe and the second pipe, and a space being left between the inlet end of the inlet pipe and the filter screen.

[0009] Optionally, the space between the inlet end of the inlet pipe and the filter screen is not less than 5mm.

[0010] Optionally, the taper angle of the inlet pipe ranges from 5° to 15°.

[0011] Optionally, the filter screen is fixed to the inner wall of the shell by a support.

[0012] Optionally, the filter screen is arc-shaped and protrudes towards the second pipe.

[0013] Optionally, the second pipe is coaxially arranged with the inlet pipe.

[0014] Optionally, the diameter of the outlet end of the inlet pipe is greater than the diameter of the second pipe.

[0015] Optionally, the compressor body comprises a compressor shell, a third pipe, a cylinder member and a crankshaft, the cylinder member being located in the compressor shell, the crankshaft penetrating through the cylinder member for driving the cylinder member to compress refrigerant, the first pipe being in communication with the cylinder member, and the third pipe being connected with the compressor shell for discharging refrigerant compressed by the cylinder member.

[0016] Optionally, the diameter of the third pipe is smaller than the diameter of the first pipe.

[0017] Based on another aspect of the present application, the present application further provides a refrigeration system, which comprises a compressor inlet assembly, and further comprises an evaporator, a condenser and an expansion valve, the evaporator, the compressor inlet assembly, the condenser and the expansion valve being sequentially connected by pipes to form a circulation loop.

[0018] With the above configuration, the gas-liquid separator is communicated with the compressor body through the first pipeline, so as to deliver the gaseous refrigerant into the compressor body for compression; on one hand, the inlet pipe is designed as a taper pipe, and the large-diameter end of the taper pipe is the inlet end of the inlet pipe; on the other hand, a spacing is left between the inlet end of the inlet pipe and the filter screen, and the spacing is not less than 5 mm; through the design of the two aspects, the flow resistance loss of the whole refrigeration system can be effectively reduced, and the pressure pulsation of the compressor is reduced, the influence of the pressure pulsation is optimized, and the method is especially suitable for the refrigeration system using low-density refrigerant, the flow of the low-density refrigerant can be greatly improved, the refrigeration efficiency and capacity are improved, the energy consumption is reduced, and the problem that the refrigerating capacity is not improved or is improved at a small amplitude with the increase of the rotating speed of the compressor is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Those skilled in the art should understand that the provided drawings are used to better understand the present application, and do not constitute any limitation on the scope of the present application. Among them:

[0020] Figure 1 is a schematic diagram of the refrigerating capacity of the prior art changing with the working frequency of the compressor;

[0021] Figure 2 is a schematic diagram of the compressor inlet assembly of an embodiment of the present application.

[0022] Among them, the reference signs are as follows:

[0023] 1-compressor body; 11-compressor shell; 12-third pipeline; 13-cylinder member; 14-crankshaft; 15-first cylinder cover; 16-second cylinder cover; 2-first pipeline; 3-gas-liquid separator; 31-housing; 32-second pipeline; 33-filter screen; 34-inlet pipe; 35-bracket. DETAILED DESCRIPTION

[0024] In this article, unless otherwise stated, the terms "up", "down", "left", "right", "in", "out", "front", "back", "top", "bottom" and the like are used to indicate the orientation or positional relationship based on the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation and operation, therefore it cannot be understood as a limitation on the present application.

[0025] The specific embodiments of the present application will be described in more detail below with reference to the schematic drawings. The advantages and features of the present application will be clearer according to the following description. It should be noted that the drawings are very simplified and all use non-precise proportions, only to facilitate, clearly assist in explaining the purpose of the embodiments of the present application.

[0026] Figure 2 is a schematic diagram of the compressor inlet assembly of an embodiment of the present application. Please refer toFigure 2 The utility model embodiment provides a kind of compressor air intake subassembly, including compressor body 1, first pipeline 2 and gas-liquid separator 3, gas-liquid separator 3 is communicated with compressor body 1 by first pipeline 2, to be compressed by first pipeline 2 to be transported into compressor body 1 with gaseous refrigerant.

[0027] Gas-liquid separator 3 includes shell 31, second pipeline 32, filter screen 33 and air inlet pipe 34, second pipeline 32 is connected with shell 31, for the refrigerant suction into shell 31, air inlet pipe 34 is located in shell 31, and the inlet of air inlet pipe 34 is towards second pipeline 32, the outlet of air inlet pipe 34 is communicated with first pipeline 2, air inlet pipe 34 is cone pipe, and the large diameter end of cone pipe is the inlet end of air inlet pipe 34, and the small diameter end of cone pipe is the outlet end of air inlet pipe 34.Further, from the angle of fluid mechanics, the cone angle α of air inlet pipe 34 is preferably in the range of 5 to 15 degrees, i.e. 5 ≤ α ≤ 15, for example, in the present embodiment, when the cone angle α is 8 degrees, the effect of reducing flow resistance loss and optimizing pressure pulsation is optimal.It is preferred that second pipeline 32 and air inlet pipe 34 are coaxially arranged, which is beneficial to reduce flow resistance loss.In general, in the working state, the axis of second pipeline 32 is vertical, i.e. the refrigerant enters gas-liquid separator 3 downward and then enters air inlet pipe 34 downward.Further, the diameter of the outlet end of air inlet pipe 34 is greater than the diameter of second pipeline 32, and in the working state, i.e. the diameter of the lower end of air inlet pipe 34 is greater than the diameter of second pipeline 32, which is beneficial to reduce the flow rate of the refrigerant, thereby further reducing flow resistance loss and alleviating pressure pulsation.It can be understood that the refrigerant first enters the gas-liquid separator, and the liquid refrigerant and gaseous refrigerant are separated by the gas-liquid separator, wherein the gaseous refrigerant enters air inlet pipe 34 and then flows into compressor body 1 through first pipeline 2.

[0028] Filter screen 33 is installed in shell 31 and located between air inlet pipe 34 and second pipeline 32, for example, filter screen 33 can be fixed to the inner wall of shell 31 by support 35, and in other embodiments, filter screen 33 can also be welded to the inner wall of shell 31.Further, filter screen 33 is arc surface, and filter screen 33 protrudes towards second pipeline 32.Filter screen 33 can block solid particles to protect the equipment from being damaged.For example, filter screen 33 is spherical surface.There is a spacing h between the inlet end of air inlet pipe 34 and filter screen 33.Further, the spacing h between the inlet end of air inlet pipe 34 and filter screen 33 is not less than 5 mm, such as Figure 2As shown, the distance h is the distance from the lower end surface of the filter screen 33 to the inlet end of the intake pipe 34, and the distance h is generally not more than 20 mm in consideration of actual assembly. The flow resistance of the fluid flowing in the pipeline can be divided into two kinds of flow resistance and local resistance, the flow resistance refers to the resistance generated by the internal friction of the fluid when the fluid flows through a straight pipe of a certain pipe diameter, the flow resistance is proportional to the length of the path, the local resistance is the resistance of the fluid flowing through the local places such as pipe fittings, valves, and sudden expansion and sudden contraction of cross section in the pipeline. Increasing the distance h can effectively reduce the local resistance loss inside the gas-liquid separator 3, thereby reducing the total flow resistance loss.

[0029] The compressor body 1 includes a compressor shell 11, a third pipeline 12, a cylinder member 13, and a crankshaft 14. The cylinder member 13 is located in the compressor shell 11, and the crankshaft 14 penetrates through the cylinder member 13 and is used to drive the cylinder member 13 to compress the refrigerant. It can be understood that the cylinder member 13 includes a first cylinder cover 15, a second cylinder cover 16, and a piston, which is sleeved on the crankshaft 14 and located in the inner cavity of the cylinder member 13, and is used to compress the refrigerant in the inner cavity of the cylinder member 13. The first pipeline 2 communicates with the cylinder member 13, and the third pipeline 12 is connected with the compressor shell 11 and is used to discharge the refrigerant compressed by the cylinder member 13. The third pipeline 12 is at least partially located outside the compressor shell 11. Further, the diameter of the third pipeline 12 is smaller than the diameter of the first pipeline 2. It can be understood that the density of the refrigerant increases and the volume decreases after being compressed by the cylinder member 13, so the diameter of the third pipeline 12 can be smaller than the diameter of the first pipeline 2.

[0030] As configured above, the gas-liquid separator communicates with the compressor body 1 through the first pipeline 2, so as to deliver the gaseous refrigerant to the compressor body 1 for compression. On the one hand, the intake pipe 34 is designed as a tapered pipe, and the large-diameter end of the tapered pipe is the inlet end of the intake pipe 34. On the other hand, a distance is left between the inlet end of the intake pipe 34 and the filter screen 33, and the distance is not less than 5 mm. Through the design of the above two aspects, the flow resistance loss of the entire refrigeration system can be effectively reduced, the pressure pulsation of the compressor can be reduced, the influence of the pressure pulsation can be optimized, and the refrigeration system using low-density refrigerant can be particularly suitable. The flow of the low-density refrigerant can be greatly improved, the refrigeration efficiency and capacity can be improved, the energy consumption can be reduced, and the problem that the refrigerating capacity is not improved or even not improved with the increase of the compressor speed can be solved.

[0031] The embodiment also provides a refrigeration system, the refrigeration system comprising the compressor air inlet assembly, the refrigeration system also comprising an evaporator, a condenser and an expansion valve, the evaporator, the compressor air inlet assembly, the condenser and the expansion valve are sequentially connected through pipes to form a circulation loop, that is, the evaporator compressor air inlet assembly condenser expansion valve evaporator.

[0032] It should be noted that the terms "one embodiment", "an embodiment", "certain embodiments", "some embodiments", etc. in the specification only indicate that the described embodiments can include a particular feature, structure or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the relevant art to implement this feature, structure or characteristic in connection with other embodiments whether or not it is explicitly described.

[0033] It should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts are described in the method part.

[0034] It should also be noted that although the above-mentioned embodiments have been disclosed as the preferred embodiments, the above-mentioned embodiments are not intended to limit the present application. For any skilled person in the art, without departing from the scope of the present application, the above-mentioned disclosed technical content can be used to make many possible changes and modifications to the technical solution of the present application, or modified as equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the present application, without departing from the scope of the present application, all still belong to the scope of protection of the present application.

[0035] It should also be understood that, unless specifically described or indicated, the terms "first", "second", "third" and the like in the specification are only used to distinguish different components, elements, steps and the like in the specification, and not to indicate a logical relationship or sequence relationship between the components, elements, steps and the like.

[0036] It is also to be realized now that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It is also to be realized that the singular forms "a", "an", and "the" include plural referents unless the context clearly indicates otherwise. By way of example, a reference to "one step" or "one device" is a reference to one or more steps or one or more devices and can include sub-steps and sub-devices. All conjunctions used herein are to be understood in the broadest possible sense, such as meaning "and", "or", and "both". Also, the word "or" should be understood to have the definition as the logical "or" rather than the logic "exclusive or" unless the context clearly indicates otherwise. Furthermore, the method and / or device embodiments of the present application can be implemented by hardware, software, firmware, or a combination thereof.

Claims

1. A compressor intake assembly, characterized in that, include: Compressor body; First pipeline; A gas-liquid separator is provided, which is connected to the compressor body via a first pipe. The gas-liquid separator includes a housing, a second pipe, a filter screen, and an inlet pipe. The second pipe is connected to the housing and is used to draw refrigerant into the housing. The inlet pipe is located inside the housing, with its inlet facing the second pipe and its outlet connected to the first pipe. The inlet pipe is a conical pipe, with its large-diameter end being the inlet end. The filter screen is installed inside the housing and located between the inlet pipe and the second pipe, with a gap between the inlet end of the inlet pipe and the filter screen.

2. The compressor intake assembly as described in claim 1, characterized in that, The distance between the inlet end of the air intake pipe and the filter screen is not less than 5mm.

3. The compressor intake assembly as described in claim 1, characterized in that, The cone angle of the intake pipe ranges from 5° to 15°.

4. The compressor intake assembly as described in claim 1, characterized in that, The filter screen is fixed to the inner wall of the housing by a bracket.

5. The compressor intake assembly as described in claim 1, characterized in that, The filter screen has an arc surface and protrudes towards the second pipe.

6. The compressor intake assembly as claimed in claim 1, characterized in that, The second pipe is coaxially arranged with the air intake pipe.

7. The compressor intake assembly as claimed in claim 1, characterized in that, The diameter of the outlet end of the air intake pipe is larger than the diameter of the second pipe.

8. The compressor intake assembly as claimed in claim 1, characterized in that, The compressor body includes a compressor housing, a third pipe, a cylinder component, and a crankshaft. The cylinder component is located in the compressor housing, and the crankshaft passes through the cylinder component to drive the cylinder component to compress refrigerant. The first pipe communicates with the cylinder component, and the third pipe is connected to the compressor housing to discharge the refrigerant compressed by the cylinder component.

9. The compressor intake assembly as claimed in claim 8, characterized in that, The diameter of the third pipe is smaller than the diameter of the first pipe.

10. A refrigeration system, characterized in that, The refrigeration system includes the compressor intake assembly as described in any one of claims 1 to 9, and further includes an evaporator, a condenser, and an expansion valve, wherein the evaporator, the compressor intake assembly, the condenser, and the expansion valve are connected in series via pipes to form a circulation loop.

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