Throttling and cooling device of compressor

Abstract

The utility model discloses a throttling and cooling device of a compressor. The throttling and cooling device comprises an electromagnetic valve, a conveying pipe, a capillary pipe, a separator and a compressor air supply port, the conveying pipe is divided into a refrigerant conveying pipe and an air pipe, the electromagnetic valve, the capillary pipe and the separator are sequentially connected through the refrigerant conveying pipe, and the separator is connected with an air supplementing opening of the compressor through the air pipe. According to the throttling and cooling device of the compressor, throttling, cooling and pressure reduction are conducted through the capillary tube, throttling control is more convenient than that of a common electronic expansion valve, cost is lower, and the complexity of expansion valve control is reduced; the separator device and a refrigerant gas-liquid separator are additionally arranged, the liquid refrigerant is effectively prevented from entering the gas supplementing opening to damage vortexes, welding of the separator device and the conveying pipe can serve as a fulcrum of a pipeline, the vibration problem of the conveying pipe is effectively solved, and multiple purposes are achieved at one stroke.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a throttling and cooling device for a compressor. Background Art

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas and is the heart of a refrigeration system. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, compresses it by driving a piston through the operation of an electric motor, and then discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle. When the compressor load is too large or the operating conditions are extremely harsh, the exhaust temperature will be extremely high. At this time, the extremely high exhaust temperature seriously affects the system energy efficiency and the service life of the compressor. In order to control and reduce the occurrence of such problems, it is necessary to cool the compressor exhaust temperature.

[0003] The traditional gas supplement and cooling method uses a conventional electronic expansion valve for liquid injection cooling. However, during cooling, it is necessary to control the liquid injection of the expansion valve. If the control is not good, the phenomenon of compressing liquid refrigerant in the middle pressure chamber of the compressor will occur, and at this time, the scroll disk will be damaged. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. In this part, as well as in the abstract of the specification and the title of the utility model of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the problems existing in the existing throttling and cooling device for a compressor, the present utility model is proposed. The technical problem solved by the present utility model is that the existing gas supplement and cooling device requires precise control, which is prone to causing liquid to enter the compression chamber and is prone to damaging the scroll disk.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: A throttling and cooling device for a compressor includes a solenoid valve, a delivery pipe, a capillary tube, a separator, and a compressor gas supplement port; the delivery pipe is divided into a refrigerant delivery pipe and an air pipe. The solenoid valve, the capillary tube, and the separator are sequentially connected through the refrigerant delivery pipe, and the separator and the compressor gas supplement port are connected through the air pipe.

[0007] As a preferred scheme of the throttling and cooling device for a compressor according to the present utility model, wherein: both the refrigerant delivery pipe and the air pipe extend into and are connected to the inside of the separator, and the refrigerant delivery pipe is a long pipe that extends to the bottom of the separator, and the air pipe is a short pipe that extends to the upper layer of the separator.

[0008] As a preferred embodiment of the compressor throttling and cooling device of the present utility model, wherein: a sealing joint is provided at the pipe connection position of the refrigerant delivery pipe and the gas pipe.

[0009] As a preferred embodiment of the compressor throttling and cooling device of the present utility model, wherein: the sealing joint includes a sealing sleeve and a rubber layer. The sealing sleeve is sleeved on the outer surface of the connection part of the delivery pipe, and the rubber layer wraps the delivery pipe.

[0010] As a preferred embodiment of the compressor throttling and cooling device of the present utility model, wherein: the middle part of the sealing sleeve has a larger volume, and the two ends have a smaller volume. The rubber layer is installed at both ends inside the sealing sleeve.

[0011] As a preferred embodiment of the compressor throttling and cooling device of the present utility model, wherein: the refrigerant delivered from the solenoid valve is liquid refrigerant, and a two-phase refrigerant can be selected.

[0012] As a preferred embodiment of the compressor throttling and cooling device of the present utility model, wherein: the delivery pipe can be connected to the solenoid valve, capillary tube, separator and compressor air intake port by welding.

[0013] Advantages of the utility model:

[0014] 1. The compressor throttling and cooling device constructed by the present utility model uses a capillary tube for throttling, cooling and pressure reduction, which is more convenient than the commonly used electronic expansion valve throttling control, and the cost is also lower, reducing the complexity of expansion valve control;

[0015] 2. The separator device is added, and the refrigerant passes through the gas-liquid separator, effectively avoiding liquid refrigerant from entering the air intake port and damaging the scroll. Moreover, the welding of the separator device and the delivery pipe can serve as a fulcrum for the pipeline, effectively reducing the vibration problem of the delivery pipe, achieving multiple benefits at once;

[0016] 3. Sealing sleeves are provided at the connection positions of the delivery pipelines to prevent the leakage of refrigerant in the pipeline, especially the gas after gas-liquid separation. Description of the drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0018] Figure 1 It is the connection diagram of the compressor throttling and cooling device according to an embodiment of the present utility model;

[0019] Figure 2A cross-sectional view of the seal sleeve of the compressor throttling and cooling device according to an embodiment of the present invention.

[0020] The markings of the components in the attached drawings are as follows: solenoid valve - 1; delivery pipe - 2; refrigerant delivery pipe - 21; gas pipe - 22; capillary tube - 3; separator - 4; compressor air make-up port - 5; sealing joint - 6; seal sleeve - 61; rubber layer - 62. Detailed implementation manners

[0021] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the drawings in the specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0023] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that mutually excludes other embodiments.

[0024] The present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the protection scope of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0025] At the same time, in the description of the present invention, it should be noted that the orientation or positional relationships indicated by terms such as "upper, lower, inner, and outer" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first, second, or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] Unless otherwise clearly defined and limited in the present utility model, the terms "installation, connection, and coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or it may be indirectly connected through an intermediate medium, or it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Embodiment 1

[0028] Referring to Figures 1 - 2 , which is the first embodiment of the present utility model. This embodiment provides a compressor throttling and cooling device that performs gas-liquid separation by adding a capillary tube and a separation device, and uses gas to cool the compressor, replacing the traditional liquid injection cooling of an electronic expansion valve to avoid damage caused by coolant entering the scroll.

[0029] Referring to Figure 1 , a compressor throttling and cooling device includes a solenoid valve 1, a delivery pipe 2, a capillary tube 3, a separator 4, and a compressor air inlet 5. The delivery pipe 2 includes a refrigerant delivery pipe 21 and an air pipe 22. The refrigerant delivery pipe 21 welds and connects the solenoid valve 1, the capillary tube 3, and the separator 4 in sequence. The air pipe 22 is welded between the separator 4 and the compressor air inlet 5. When the refrigerant delivery pipe 21 and the air pipe 22 are welded to the separator 4, the part of the refrigerant delivery pipe 21 extending into the separator 4 is a long pipe that extends to the bottom end of the separator 4, and the part of the air pipe 22 extending into the separator 4 is a short pipe that extends to the upper layer of the separator 4. The refrigerant delivery pipe 21 inputs the liquid refrigerant to the position of the solenoid valve 1. After the solenoid valve 1 controls the delivered liquid refrigerant, it is input to the capillary tube 3. The liquid refrigerant passes through the throttling and pressure reduction of the capillary tube 3 and flows into the separator 4. The separator 4 performs gas-liquid separation on the liquid refrigerant, and the separated gas is introduced into the compressor air inlet through the air pipe 22 and enters the compressor air cavity for cooling. The liquid refrigerant can use mixed refrigerants, two-phase refrigerants, etc.

[0030] It should also be noted in this embodiment that referring to Figure 2 , a seal joint 6 is provided at the interface position where the pipes of the delivery pipe 2 are connected. The seal joint 6 includes two parts: a seal sleeve 61 and a rubber layer 62. The seal sleeve 61 is sleeved on the outer surface of the connection part of the delivery pipe 2, and the middle volume of the sleeve structure is large while the volumes at both ends are small. The two ends of the seal sleeve 6 are fixed on the outer walls of the two sections of the delivery pipe 2, and the rubber layer 62 is arranged on the inner walls at the two fixed positions. The rubber tightly wraps around the outer wall of the delivery pipe 2, achieving the effects of sealing and fixing.

[0031] According to the above-mentioned compressor throttling and cooling device, its working principle is as follows: The refrigerant delivery pipe 21 inputs liquid refrigerant into the solenoid valve 1. The solenoid valve 1 controls the input of the liquid refrigerant. When the transported liquid refrigerant enters the capillary tube 3, the capillary tube 3 throttles the liquid. The throttled refrigerant enters the bottom of the separator 4. The separator 4 performs gas-liquid separation. The separated gaseous refrigerant gathers upward at the top of the separator 4. The gaseous refrigerant is sucked into the compression chamber by the negative pressure formed by the compressor scroll plate through the short pipe of the gas pipe 22 for cooling the scroll plate, completing the cooling process. The gaseous refrigerant enters the compressor air supplement port 5 from the short pipe orifice of the gas pipe 22. At this time, a fully gaseous air-supplemented compressor can be ensured, effectively reducing the entry of liquid refrigerant into the compressor, ensuring the volumetric efficiency and mechanical efficiency of the compressor, and at the same time guaranteeing the service life of the compressor.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A compressor throttling and cooling device, characterized in that: It comprises a solenoid valve (1), a delivery pipe (2), a capillary tube (3), a separator (4) and a compressor air supply port (5); The delivery pipe (2) is divided into a refrigerant delivery pipe (21) and an air pipe (22); the solenoid valve (1), the capillary tube (3) and the separator (4) are connected in sequence through the refrigerant delivery pipe (21); and the separator (4) and the compressor air supply port (5) are connected through the air pipe (22); The refrigerant delivery pipe (21) and the air pipe (22) are both extended and connected to the interior of the separator (4), and the refrigerant delivery pipe (21) is a long pipe extending to the bottom of the separator (4), and the air pipe (22) is a short pipe extending to the upper layer of the separator (4).

2. The compressor throttling and cooling device according to claim 1, characterized in that: The refrigerant delivery pipe (21) and the gas pipe (22) are provided with a sealing joint (6) at the position where the pipes are connected.

3. The compressor throttling and cooling device according to claim 2, characterized in that: The sealing joint (6) comprises a sealing sleeve (61) and a rubber layer (62); the sealing sleeve (61) is sleeved on the outer surface of the connection portion of the delivery pipe (2); and the rubber layer (62) wraps the delivery pipe (2).

4. The compressor throttling and cooling device according to claim 3, characterized in that: The sealing sleeve (61) has a large volume in the middle and small volumes at both ends, and the rubber layers (62) are installed at both ends inside the sealing sleeve (61).

5. The compressor throttling and cooling device according to claim 1, characterized in that: The refrigerant delivered from the solenoid valve (1) is liquid refrigerant, and a two-phase refrigerant can be selected.

6. The compressor throttling and cooling device according to claim 1, characterized in that: The delivery pipe (2) can be connected to the compressor air supply port (5) by welding the electromagnetic valve (1), the capillary tube (3), the separator (4) and the compressor air supply port (5).

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