A liquid-surge-proof compressor

Abstract

The present invention discloses a liquid-surge-proof compressor, comprising a liquid separator and a compressor body, and also comprising a circulation heating module, wherein the circulation heating module comprises a liquid separation inlet and a liquid separation outlet arranged in the liquid separator, and a compression inlet, a compression outlet, a sealed chamber and a heating component arranged in the compressor body for heating and vaporizing the liquid refrigerant flowing through the sealed chamber, and the liquid separation outlet is connected to the compression inlet, and the compression outlet is connected to the liquid separation inlet. The present invention provides a liquid-surge-proof compressor, which is provided with a separate circulation heating module, and realizes the evaporation and vaporization of the liquid refrigerant in the liquid separator by the high-temperature and high-pressure gas output by the compression pump, so that the liquid refrigerant in the liquid separator is circulated through the circulation heating module, thereby preventing the liquid refrigerant from entering the compression pump and eliminating the risk of liquid shock in the compressor.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a liquid-surge-proof compressor. Background Art

[0002] When the refrigeration compressor is working under low load conditions, the suction superheat is small, and the gas sucked into the compressor is prone to liquid. That is, the refrigerant is in a state where liquid and gas coexist. At this time, if liquid refrigerant is sucked into the compressor, the poor compressibility of the liquid will cause liquid hammer failure of the compressor and wear of the compression components.

[0003] Patent CN109058105A discloses a compressor that prevents liquid hammer. A bypass line is installed inside the compressor, connecting the suction port of the liquid separator to the exhaust pipe of the compressor body. This allows high-temperature gas discharged from the exhaust pipe to be introduced into the liquid separator through the bypass line. The heat from the high-temperature gas evaporates the liquid refrigerant drawn into the liquid separator, alleviating the abnormal noise caused by liquid inhalation. In this structure, a control valve is required in the bypass line. Because the exhaust pipe cannot be constantly connected to the liquid separator, the bypass line is connected at intervals. This intermittent control method can only periodically evaporate the liquid in the liquid separator. When the bypass line is disconnected, the liquid in the liquid separator will still enter the compressor. In other words, this structure can only periodically eliminate the risk of liquid hammer, but cannot effectively prevent it in real time. Summary of the Invention

[0004] The present invention aims to address, at least to some extent, one of the problems in the related art. To this end, the present invention provides a compressor that is resistant to liquid hammer, equipped with a separate circulation heating module. The module uses high-temperature, high-pressure gas output by the compressor pump to evaporate and vaporize the liquid refrigerant in the liquid separator. This allows the liquid refrigerant in the liquid separator to circulate through the circulation heating module, preventing the liquid refrigerant from entering the compressor pump and eliminating the risk of liquid hammer in the compressor.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a liquid-surge-proof compressor, comprising a liquid separator and a compressor body, and also comprising a circulating heating module, wherein the circulating heating module comprises a liquid separation inlet and a liquid separation outlet arranged in the liquid separator, and a compression inlet, a compression outlet, a sealed chamber and a heating component for heating and vaporizing the liquid refrigerant flowing through the sealed chamber arranged in the compressor body, and the liquid separation outlet is connected to the compression inlet, and the compression outlet is connected to the liquid separation inlet.

[0006] Furthermore, the compressor body also includes a motor and a compression pump, and the sealed chamber is located between the compression pump and the motor.

[0007] Furthermore, the compressor body also includes an exhaust port; the heating component is a heating pipe that passes through the sealed chamber, one end of the heating pipe is connected to the outlet of the compression pump, and the other end is connected to the exhaust port of the compressor body.

[0008] Furthermore, the exhaust port is located at the top of the compressor body, and the heating pipe and the exhaust port are connected through an exhaust channel, and the exhaust channel is located inside or outside the motor.

[0009] Furthermore, the circulating heating module also includes a muffler and a sealing cover. The muffler is located above the compressor. A sealing cover is provided on the outside of the muffler. A sealed chamber is formed between the muffler and the sealing cover.

[0010] Furthermore, the central axis of the muffler coincides with the central axis of the compression pump and the central axis of the motor.

[0011] Furthermore, the heating pipe and the sealing chamber are welded by brazing; and the muffler and the sealing cover are welded by resistance welding.

[0012] Furthermore, the compression inlet is arranged on a side of the sealed chamber close to the liquid separator, and the compression outlet is arranged on a side of the sealed chamber away from the liquid separator.

[0013] Furthermore, the liquid separation outlet is arranged at the bottom of the liquid separator, and the liquid separation inlet is arranged at the top of the liquid separator; the liquid separation outlet and the compression inlet are connected through an outlet guide pipe, and the liquid separation inlet and the compression outlet are connected through an inlet guide pipe.

[0014] Furthermore, a control valve is provided in the outlet guide pipe.

[0015] The above-mentioned technical scheme provided by the embodiment of the present application has the following advantages compared with the prior art: in the circulating heating module of the present application, the liquid separation outlet is connected to the compression inlet, and the compression inlet is connected to the liquid separation outlet, forming a circulation channel between the liquid separator and the compressor body. In the channel, the liquid refrigerant in the liquid separator enters the sealed chamber through the liquid separation outlet and the compression inlet, and the heating component is used to heat and vaporize the liquid refrigerant flowing through the sealed chamber. The vaporized gaseous refrigerant circulates to the inside of the liquid separator through the compression outlet and the liquid separation inlet to participate in the normal refrigerant compression process; the circulation channel formed by the circulating heating module in the present application is specifically for the liquid refrigerant in the liquid separator, and the gaseous refrigerant normally participates in the compression cycle, while the liquid refrigerant will be vaporized after passing through the circulation channel, and can also participate in the compression cycle when returning to the liquid separator; the present application can prevent the liquid refrigerant from entering the compression pump, eliminating the risk of liquid hammer in the compressor; and at the same time, it can also improve the utilization rate of the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] In the attached figure:

[0019] Figure 1 Schematic diagram of the overall structure of the anti-liquid hammer compressor in this application;

[0020] Figure 2 This is a schematic structural diagram of the sealed chamber in this application;

[0021] Figure 3 is a schematic diagram of the silencer in this application;

[0022] Figure 4 A schematic diagram of the sealing cover in this application;

[0023] Figure 5 This is a schematic diagram of a compressor with an additional control valve in Example 2;

[0024] Figure numbers: 1. Compressor body; 11. Exhaust port; 12. Compression inlet; 13. Compression outlet; 14. Sealed chamber; 15. Muffler; 16. Sealing cover; 17. Outlet guide pipe; 18. Inlet guide pipe; 19. Heating pipe; 20. Motor; 21. Compression pump; 3. Liquid distributor; 31. Liquid distributor inlet; 32. Liquid distributor outlet; 33. Gas outlet; 4. Control valve. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the mechanisms or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0026] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0027] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, mechanisms, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0028] See also Figure 1-Figure 4 The present application provides a liquid-surge-proof compressor, comprising a liquid separator 3 and a compressor body 1, and also comprising a circulating heating module. The circulating heating module comprises a liquid separation inlet 31 and a liquid separation outlet 32 arranged in the liquid separator 3, and a compression inlet 12, a compression outlet 13, a sealed chamber 14 and a heating component arranged in the compressor body, and the liquid separation outlet 32 is connected to the compression inlet 12, and the compression outlet 13 is connected to the liquid separation inlet 31; the heating component is used to heat and vaporize the liquid refrigerant flowing through the sealed chamber 14.

[0029] In the circulating heating module of the present application, the liquid separation outlet 32 is connected to the compression inlet 12, and the compression inlet 12 is connected to the liquid separation outlet 32, forming a circulation channel between the liquid separator 3 and the compressor body 1. In the channel, the liquid in the liquid separator 3 enters the sealed chamber 14 through the liquid separation outlet 32 and the compression inlet 12. The heating component is used to heat and vaporize the liquid refrigerant flowing through the sealed chamber 14. The vaporized gaseous refrigerant circulates to the inside of the liquid separator 3 through the compression outlet 13 and the liquid separation inlet 31 to participate in the normal refrigerant compression process; the circulation channel formed by the circulating heating module in the present application is specifically for the liquid refrigerant in the liquid separator 3, and the gaseous refrigerant normally participates in the compression cycle, while the liquid refrigerant will be vaporized after passing through the circulation channel, and can also participate in the compression cycle when returning to the liquid separator 3; the present application can prevent the liquid from entering the compression pump 21, eliminating the risk of liquid hammer in the compressor; at the same time, it can also improve the utilization rate of the refrigerant.

[0030] Example 1

[0031] The liquid-surge-proof compressor provided in the present application includes a liquid separator 3 and a compressor body 1, wherein the liquid separator 3 includes a liquid separator outlet 32 and a gas outlet 33 arranged at the bottom of the liquid separator 3, and a liquid separator inlet 31 arranged at the top of the liquid separator 3; wherein the liquid separator outlet 32 is used to discharge the liquid refrigerant in the liquid separator 3, and the gas outlet 33 is used to discharge the gaseous refrigerant in the liquid separator 3, wherein the gaseous refrigerant participates in the normal refrigerant compression process, and the liquid refrigerant enters the circulating heating module to participate in the vaporization process, and the gaseous refrigerant formed after vaporization circulates into the liquid separator inlet 31 to participate in the normal refrigerant compression process.

[0032] In the present application, a gas-liquid separation device is provided in the liquid separator 3 to separate the liquid refrigerant and the gaseous refrigerant, so that the gaseous refrigerant is discharged from the gas outlet 33 and the liquid refrigerant is discharged from the liquid separation outlet 32 .

[0033] The circulating heating module includes a liquid separation inlet 31 and a liquid separation outlet 32 provided in the liquid separator 3, as well as a compression inlet 12, a compression outlet 13, a sealed chamber 14 and a heating component provided in the compressor body, wherein the liquid separation outlet 32 is connected to the compression inlet 12, and the compression outlet 13 is connected to the liquid separation inlet 31; the heating component is used to heat and vaporize the liquid refrigerant flowing through the sealed chamber 14. In other words, the circulating heating module forms a circulation channel for the liquid refrigerant, and the liquid refrigerant in the liquid separator 3 passes through the liquid separation outlet 32, the compression inlet 12, the sealed chamber 14 and the compression outlet 13 in sequence, and then enters the liquid separation inlet 31, wherein the liquid refrigerant flowing through the sealed chamber 14 is heated and vaporized by the heating component to become a gaseous refrigerant. It can be seen that in the channel formed by the circulating heating module, the refrigerant before the sealed chamber 14 is in a liquid state, and the refrigerant after the sealed chamber 14 is in a gaseous state, thereby realizing the process of converting the liquid refrigerant in the liquid separator 3 into a gaseous refrigerant.

[0034] In the present application, the compressor body includes a motor 20, a compression pump 21 and an exhaust port 11 located at the top of the compressor body 1, wherein the inlet of the compression pump 21 is connected to the gas outlet 33 of the liquid separator 3, and is used to compress the gaseous refrigerant output by the liquid separator 3 into a high-temperature and high-pressure gaseous refrigerant and discharge it through the exhaust port 11. The motor 20 is located above the compression pump 21 and is used to drive the compression pump 21 to operate.

[0035] As a specific embodiment, the present application sets the sealed chamber 14 between the compression pump 21 and the motor 20 .

[0036] As a specific embodiment, the heating component in the present application is a heating tube 19 that passes through the sealed chamber 14. One end of the heating tube 19 is connected to the outlet of the compression pump 21, and the other end is connected to the exhaust port 11 of the compressor body 1. The gaseous refrigerant output by the compression pump 21 is a high-temperature and high-pressure gas. The high-temperature and high-pressure gas is discharged to the exhaust port 11 through the heating tube 19. The present application uses this high-temperature and high-pressure gas to realize the vaporization process of the liquid refrigerant inside the sealed chamber 14. Since the liquid refrigerant in the liquid separator 3 is relatively small and does not exist at all times, the occasional vaporization of a small amount of liquid refrigerant will not have much impact on the high-temperature and high-pressure gas output by the compression pump 21. Note: The heating hole 19 is independent of the interior of the sealed chamber 14.

[0037] Since the exhaust port 11 in the present application is located at the top of the compressor body 1, the heating pipe 19 and the exhaust port 11 are connected through the exhaust channel, and the sealed chamber 14 is located between the compression pump 21 and the motor 20, and the motor 20 is located above the compression pump 21, that is, the high-temperature and high-pressure gas output by the compression pump 21 needs to pass through the exhaust channel inside or outside the motor 20 to reach the exhaust port 11. When the compressor is operating normally, the motor 20 generates heat, and the temperature of the high-temperature and high-pressure gas is lower than the temperature of the motor 20. During this process, the high-temperature and high-pressure gas cools the motor 20. In the present application, since the high-temperature and high-pressure gas output by the compression pump 21 has already undergone heat exchange with the liquid refrigerant at the heating pipe 19, the liquid refrigerant is vaporized into a gaseous refrigerant after being heated. During the heat exchange process, the temperature of the high-temperature and high-pressure gas decreases. When it passes through the exhaust channel and reaches the exhaust port 11, the high-temperature and high-pressure gas after cooling can take away more heat from the motor 20, further reducing the power consumption of the motor 20.

[0038] The heating component of the present application is a heating pipe 19 that passes through the sealed chamber 14. The setting of the heating component and the sealed chamber 14 first allows the liquid refrigerant in the liquid separator 3 to pass through the liquid separation outlet 32, the compression inlet 12, the sealed chamber 14 and the compression outlet 13, and then enter the liquid separation inlet 31. Among them, the liquid refrigerant flowing through the sealed chamber 14 is heated by the heating component and vaporized into a gaseous refrigerant, realizing the process of converting the liquid refrigerant in the liquid separator 3 into a gaseous refrigerant, thereby improving the refrigerant utilization rate.

[0039] Secondly, this application does not require the installation of an additional heating device. It only needs to use the high-temperature and high-pressure gas output by the compression pump 21 to achieve the vaporization of the liquid refrigerant, which simplifies the structure of the compressor, fully utilizes the internal structure and products, and realizes the vaporization and recycling of the liquid refrigerant.

[0040] Finally, the high-temperature and high-pressure gas output by the compression pump 21 of the present application has its temperature reduced after heat exchange with the liquid refrigerant. When passing through the motor 20, it can take away more heat in the motor 20, further reducing the power consumption of the motor 20.

[0041] Example 2

[0042] The device in this embodiment includes the structure in embodiment 1. On the basis of embodiment 1, the circulating heating module in this embodiment further includes a muffler 15 and a sealing cover 16. Figure 2-Figure 4 As shown, the muffler 15 is located above the compressor, and a sealing cover 16 is provided on the outside of the muffler 15, forming a sealed chamber 14 between the muffler 15 and the sealing cover 16. The muffler 15 is used to reduce the noise of the compression pump 21, and its specific structure can adopt any muffler structure in the prior art. The present application creatively provides a sealing cover 16 that is compatible with the outside of the muffler 15, and the size of the sealing cover 16 is larger than the muffler 15, so that a sealed chamber 14 is formed between the sealing cover 16 and the outside of the muffler 15.

[0043] As a specific embodiment, in the present application, the central axis of the muffler 15 coincides with the central axis of the compression pump 21 and the central axis of the motor 20; the sealed chamber 14 is an annular chamber surrounding the side of the central axis.

[0044] As a specific embodiment, Figure 2-Figure 4 As shown, in the present application, the bottom of the muffler 15 is provided with an outward protrusion, and the top is provided with an upward protrusion. The sealing cover 16 only needs to cover the outside of the muffler 15, and the bottom of the sealing cover 16 and the outward protrusion at the bottom of the muffler 15 are welded by resistance welding, and the top of the sealing cover 16 and the upward protrusion at the top of the muffler 15 are welded by resistance welding to obtain the sealed chamber 14.

[0045] A heating pipe 19 is provided at the top of the sealed chamber 14. This pipe extends through the sealed chamber 14, specifically through the sealing cover 16 and the muffler 15. To ensure a sealed enclosure within the sealed chamber 14, the heating pipe 19 is brazed to the sealing cover 16 and the muffler 15. The heating pipe 19 may be a separate tubular structure with open ends, which is then brazed to the sealing cover 16 and the muffler 15.

[0046] The sealed chamber 14 is annular in structure. The heating pipe 19 is independent of the sealed chamber 14 and does not interfere with it. The heating pipe 19 passes through the sealed chamber 14 to exchange heat with the liquid refrigerant inside. To ensure effective heat exchange, multiple heating pipes 19 can be provided, and the specific number can be determined based on the compressor's application and actual needs. Similarly, the area of the heating pipe 19 can also be adjusted based on actual needs.

[0047] Example 3

[0048] The device in this embodiment includes the structure in Example 2. Based on Example 2, the compression inlet 12 in this application is arranged on the side of the sealed chamber 14 close to the liquid separator 3, and the compression outlet 13 is arranged on the side of the sealed chamber 14 away from the liquid separator 3.

[0049] At the same time, the liquid separation outlet 32 is set at the bottom of the liquid separator 3, and the liquid separation inlet 31 is set at the top of the liquid separator 3; the liquid separation outlet 32 and the compression inlet 12 are connected through the outlet guide pipe 17, and the liquid separation inlet 31 and the compression outlet 13 are connected through the inlet guide pipe 18.

[0050] As a specific embodiment, a control valve 4 is provided in the outlet guide pipe 17 of the present application. When the control valve 4 is opened, the circulation channel of the liquid refrigerant is connected; when the control valve 4 is closed, the circulation channel of the liquid refrigerant is closed. Since the amount of liquid refrigerant in the liquid separator 3 is small and a gas-liquid separation device is provided at the bottom of the liquid separator 3, there is no need to worry about the liquid refrigerant entering the compression pump 21. At the same time, after the liquid refrigerant accumulates for a period of time, the control valve 4 can be opened to allow the liquid refrigerant to enter the sealed chamber 14 for heating and vaporization.

[0051] As a specific embodiment, the present application may also provide a pressure sensor at the liquid separation outlet 32. When the liquid pressure sensed by the pressure sensor reaches a preset value, the control valve 4 is automatically controlled to open, thereby realizing the automated processing of the liquid refrigerant.

[0052] When there is no control valve 4 in the compressor of the present application, the liquid refrigerant in the liquid separator 3 can be transmitted in real time into the sealed chamber 14 for vaporization. When a control valve 4 is provided, the liquid refrigerant in the liquid separator 3 can accumulate to a certain pressure and then automatically enter the sealed chamber 14 for vaporization. Regardless of the control method adopted, the present application can ensure that the liquid refrigerant will not enter the compression pump 21, and at the same time use the high-temperature and high-pressure gas output by the compression pump 21 to realize the vaporization of the liquid refrigerant, and can further reduce the power consumption of the motor 20; on this basis, it will not affect the normal output of the compressor.

[0053] The compressor in this application can be used in air-conditioning systems or other electrical devices that need to achieve cooling and heating functions.

[0054] It is understandable that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A liquid-surge-proof compressor, comprising a liquid separator and a compressor body, characterized in that: It also includes a circulation heating module, which includes a liquid separation inlet and a liquid separation outlet arranged in the liquid separator, and a compression inlet, a compression outlet, a sealed chamber and a heating component for heating and vaporizing the liquid refrigerant flowing through the sealed chamber arranged in the compressor body, the liquid separation inlet is arranged at the top of the liquid separator; and the liquid separation outlet is connected to the compression inlet, and the compression outlet is connected to the liquid separation inlet; the compressor body also includes a motor and a compression pump; the compressor body also includes an exhaust port; the heating component is a heating pipe that passes through the sealed chamber, one end of the heating pipe is connected to the outlet of the compression pump, and the other end is connected to the exhaust port of the compressor body; The circulating heating module also includes a muffler and a sealing cover. The muffler is located above the compressor. A sealing cover is provided on the outside of the muffler, and a sealed chamber is formed between the muffler and the sealing cover. The compression inlet is provided on the side of the sealed chamber close to the liquid separator, and the compression outlet is provided on the side of the sealed chamber away from the liquid separator. The liquid refrigerant in the liquid separator passes through the liquid separation outlet, the compression inlet, the sealed chamber and the compression outlet in sequence, and then enters the liquid separation inlet, wherein the liquid refrigerant flowing through the sealed chamber is heated and vaporized by the heating component to become a gaseous refrigerant.

2. The liquid-surge-proof compressor according to claim 1, characterized in that: The sealed chamber is located between the compression pump and the motor.

3. The liquid-surge-proof compressor according to claim 1, characterized in that: The exhaust port is located at the top of the compressor body, and the heating pipe and the exhaust port are connected through an exhaust channel, and the exhaust channel is located inside or outside the motor.

4. The liquid-surge-proof compressor according to claim 1, characterized in that: The central axis of the muffler coincides with the central axis of the compression pump and the central axis of the motor.

5. The liquid-surge-proof compressor according to claim 1, characterized in that: The heating pipe and the sealing chamber are welded by brazing; the muffler and the sealing cover are welded by resistance welding.

6. The liquid-surge-proof compressor according to claim 1, characterized in that: The liquid separation outlet is arranged at the bottom of the liquid separator, and the liquid separation outlet is communicated with the compression inlet through an outlet guide pipe, and the liquid separation inlet is communicated with the compression outlet through an inlet guide pipe.

7. The liquid-surge-proof compressor according to claim 6, characterized in that: A control valve is provided in the outlet guide pipe.

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