Gas-liquid separation device and heat pump system

Abstract

The present application relates to a gas-liquid separation device and a heat pump system. The gas-liquid separation device includes a cylinder, a diverter plate, a partition assembly, and an outlet pipe. The cylinder is provided with an inner cavity. The partition assembly divides the inner cavity into an inlet cavity, an outlet cavity, a separation cavity, a heat release cavity, and a heat absorption cavity, which are sequentially distributed along the axial direction of the cylinder. The side wall of the cylinder is provided with a first hot flow channel, a first cold flow channel, a second hot flow channel, and a second cold flow channel. The diverter plate is provided in the inlet cavity to divide the inlet cavity into a hot inlet cavity and a cold inlet cavity. The outlet pipe is sequentially provided through the inlet cavity, the outlet cavity, and the separation cavity and connects to the separation cavity. The hot inlet cavity is connected to the separation cavity through the first hot flow channel, the heat release cavity, the second hot flow channel, and the outlet cavity, respectively. The cold inlet cavity is connected to the separation cavity through the first cold flow channel, the heat absorption cavity, the second cold flow channel, and the outlet cavity, respectively. The gas-liquid separation device and heat pump system provided by the present application solve the problem of a significant decrease in heat pump operating efficiency and difficulty in compressor oil return due to excessively low ambient temperature.

Description

Technical Field

[0001] The present application relates to the technical field of gas-liquid separators, and in particular to a gas-liquid separation device and a heat pump system. Background Art

[0002] As new energy electric vehicles become increasingly common, research on electric vehicle thermal management is gaining increasing attention. Electric vehicle thermal management primarily encompasses battery thermal management, cabin air conditioning systems, and motor and electronic control thermal management.

[0003] Compared with traditional cars that use engine waste heat for heating, most pure electric car models use heat pumps combined with PTC for thermal management. PTC is used to heat the passenger compartment or battery pack at low temperatures. PTC has the advantages of fast heating speed and is not affected by ambient temperature. However, PTC has low heating efficiency and high energy consumption.

[0004] Correspondingly, heat pumps have a relatively high heating energy efficiency ratio, but their operation is significantly limited by the ambient temperature. At low temperatures, the refrigerant's evaporation pressure is relatively low, resulting in a decrease in the compressor's suction density. This reduces the refrigerant's quality and flow rate at the same speed, significantly reducing the overall heating capacity and efficiency of the heat pump. Furthermore, at low temperatures, the lubricating oil and refrigerant in the gas-liquid separator are less miscible at low temperatures, making stratification more likely. The viscosity of the lubricating oil increases as the temperature decreases, making it difficult for the compressor to return oil. Summary of the Invention

[0005] Based on this, it is necessary to provide a gas-liquid separation device and a heat pump system to solve the problem that the operating efficiency of the heat pump is greatly reduced due to the low ambient temperature and the compressor oil return is difficult.

[0006] The gas-liquid separation device provided in the present application includes a cylinder, a diverter plate, a partition assembly and an outlet pipe. The cylinder is provided with an inner cavity, and the partition assembly is provided in the inner cavity, and the inner cavity is divided into an inlet cavity, an outlet cavity, a separation cavity, a heat release cavity and a heat absorption cavity distributed in sequence along the axial direction of the cylinder. The side wall of the cylinder is provided with a first hot flow channel, a first cold flow channel, a second hot flow channel and a second cold flow channel. The diverter plate is provided in the inlet cavity to separate the inlet cavity into a hot inlet cavity and a cold inlet cavity. The outlet pipe is sequentially provided in the inlet cavity, the outlet cavity and the separation cavity, and is connected to the separation cavity. The hot inlet cavity is connected to the separation cavity through the first hot flow channel, the heat release cavity, the second hot flow channel and the outlet cavity in sequence. The cold inlet cavity is connected to the separation cavity through the first cold flow channel, the heat absorption cavity, the second cold flow channel and the outlet cavity in sequence.

[0007] In one embodiment, the first hot flow channel includes a plurality of first branch hot runners spaced apart along the circumference of the cylinder, and the second cold flow channel includes a plurality of second branch cold runners spaced apart along the circumference of the cylinder, and the first branch hot runners and the second branch cold runners are alternately arranged along the circumference of the cylinder.

[0008] In one embodiment, the second hot flow channel includes a plurality of second branch hot runners spaced apart along the circumference of the cylinder, the first cold flow channel includes a plurality of first branch cold runners spaced apart along the circumference of the cylinder, and the second branch hot runners and the first branch cold runners are alternately arranged along the circumference of the cylinder.

[0009] In one embodiment, the first hot flow channel, the first cold flow channel, the second hot flow channel, and the second cold flow channel are spaced apart and distributed along the circumference of the cylinder.

[0010] In one embodiment, the first hot flow channel and the second hot flow channel are arranged opposite to each other along the radial direction of the cylinder, and the first cold flow channel and the second cold flow channel are arranged opposite to each other along the radial direction of the cylinder.

[0011] In one embodiment, the first hot flow channel and the second cold flow channel are distributed along the radial direction of the cylinder, and the first hot flow channel is provided at one end of the cylinder side wall close to the inner cavity, and the second cold flow channel is provided at one end of the cylinder side wall away from the inner cavity. The first cold flow channel and the second hot flow channel are distributed along the radial direction of the cylinder, and the second hot flow channel is provided at one end of the cylinder side wall close to the inner cavity, and the first cold flow channel is provided at one end of the cylinder side wall away from the inner cavity.

[0012] In one embodiment, the gas-liquid separation device also includes a separation hood arranged in the separation chamber, the separation hood is fixedly mounted on one end of the outlet pipe close to the outlet chamber, and the opening of the separation hood faces away from the outlet chamber, so that the refrigerant in the form of a gas-liquid mixture entering the separation chamber from the outlet chamber can impact the end of the separation hood away from its own opening.

[0013] In one embodiment, the gas-liquid separation device also includes a separation cylinder connected to the separation hood. The separation cylinder is arranged on the side of the separation hood away from the outlet cavity and is fixedly mounted on the outer peripheral side of the air outlet pipe. The opening of the separation cylinder is facing the direction close to the separation hood, and the inner diameter of the separation hood is larger than the inner diameter of the separation cylinder. A connecting hole connected to the separation cylinder is provided at the end of the air outlet pipe away from the opening of the separation cylinder.

[0014] In one embodiment, the partition assembly includes a first partition, a second partition, a third partition and a fourth partition distributed in sequence along the axial direction of the cylinder, the first partition is arranged between the inlet chamber and the outlet chamber, the second partition is arranged between the outlet chamber and the separation chamber, and the outlet chamber can be connected to the separation chamber through the perforation on the second partition, the third partition is arranged between the separation chamber and the heat release chamber, and the fourth partition is arranged between the heat release chamber and the heat absorption chamber.

[0015] The present application also provides a heat pump system, which includes the gas-liquid separation device described in any one of the above embodiments.

[0016] Compared with the prior art, the gas-liquid separation device and heat pump system provided by the present application are arranged in sequence along the axis of the cylinder, the heat release chamber and the heat absorption chamber. Therefore, the heat release chamber is arranged between the separation chamber and the heat absorption chamber. At this time, the high-temperature refrigerant in the heat release chamber can transfer heat to the separation chamber and the heat absorption chamber respectively. On the one hand, the oil temperature at the bottom of the separation chamber (close to the end of the heat release chamber) can be increased and the viscosity can be reduced, and the mutual solubility of the oil and the refrigerant is improved, which is beneficial to the oil return of the compressor. On the other hand, by heating the low-temperature refrigerant, the evaporation pressure of the low-temperature refrigerant is increased, thereby increasing the suction density of the compressor, so that the mass and flow rate of the low-temperature refrigerant at the same speed are increased, thereby greatly improving the heating capacity and heating efficiency of the entire heat pump system. On the other hand, the liquid refrigerant in the low-temperature refrigerant absorbs a large amount of heat and vaporizes, avoiding the liquid hammer effect on the compressor.

[0017] Furthermore, through the heat exchange between the low-temperature refrigerant in the heat absorption chamber and the high-temperature refrigerant in the heat release chamber, the temperature and flow rate of the high-temperature refrigerant before entering the compressor can be effectively reduced, and the temperature and flow rate of the low-temperature refrigerant before entering the compressor can be effectively increased, so that the temperature and flow rate of the high-temperature refrigerant and the low-temperature refrigerant tend to be balanced.

[0018] Furthermore, compared with the prior art method of heating the low-temperature refrigerant inside the gas-liquid separator through a winding tube, the gas-liquid separation device in the present application is equipped with multiple channels and cavities inside its own cylinder to realize heat exchange between the low-temperature refrigerant and the high-temperature refrigerant, which greatly reduces the volume of the gas-liquid separation device and reduces the difficulty of assembling the gas-liquid separation device.

[0019] In summary, the gas-liquid separation device provided in this application can not only solve the problem of a significant decrease in the operating efficiency of the heat pump and difficulty in oil return of the compressor due to the low ambient temperature, but also make the temperature and flow rate of the high-temperature refrigerant and the low-temperature refrigerant tend to be balanced, and greatly reduce the volume and assembly difficulty of the gas-liquid separation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of a gas-liquid separation device according to an embodiment of the present application;

[0022] Figure 2 A top view of a gas-liquid separation device according to an embodiment of the present application;

[0023] Figure 3 for Figure 2 A cross-sectional view at AA is shown;

[0024] Figure 4 for Figure 2 A cross-sectional view at BB is shown;

[0025] Figure 5 A schematic diagram of the partial structure of a gas-liquid separation device according to an embodiment of the present application Figure 1 ;

[0026] Figure 6 A schematic diagram of the partial structure of a gas-liquid separation device according to an embodiment of the present application Figure 2 ;

[0027] Figure 7 A schematic diagram of the partial structure of a gas-liquid separation device according to an embodiment of the present application Figure 3 .

[0028] Reference numerals: 100, cylinder; 110, inner cavity; 111, inlet cavity; 1111, hot inlet cavity; 1112, cold inlet cavity; 112, outlet cavity; 113, separation cavity; 114, heat release cavity; 115, heat absorption cavity; 120, first hot flow channel; 121, first branch hot flow channel; 130, first cold flow channel; 131, first branch cold flow channel; 140, second hot flow channel; 141, second branch hot flow channel; 150, second cold flow channel Channel; 151, second branch cold flow channel; 160, cylinder body; 170, bottom plate; 200, cover body; 210, air outlet; 220, hot flow inlet; 230, cold flow inlet; 300, diverter plate; 400, partition assembly; 410, first partition; 420, second partition; 421, perforation; 430, third partition; 440, fourth partition; 500, air outlet pipe; 510, connecting hole; 600, separation cover; 700, separation cylinder. DETAILED DESCRIPTION

[0029] As new energy electric vehicles become increasingly common, research on electric vehicle thermal management is gaining increasing attention. Electric vehicle thermal management primarily encompasses battery thermal management, cabin air conditioning systems, and motor and electronic control thermal management.

[0030] Compared with traditional cars that use engine waste heat for heating, most pure electric car models use heat pumps combined with PTC for thermal management. PTC is used to heat the passenger compartment or battery pack at low temperatures. PTC has the advantages of fast heating speed and is not affected by ambient temperature. However, PTC has low heating efficiency and high energy consumption.

[0031] Correspondingly, heat pumps have a relatively high heating energy efficiency ratio, but their operation is significantly limited by the ambient temperature. At low temperatures, the refrigerant's evaporation pressure is relatively low, resulting in a decrease in the compressor's suction density. This reduces the refrigerant's quality and flow rate at the same speed, significantly reducing the overall heating capacity and efficiency of the heat pump. Furthermore, at low temperatures, the lubricating oil and refrigerant in the gas-liquid separator are less miscible at low temperatures, making stratification more likely. The viscosity of the lubricating oil increases as the temperature decreases, making it difficult for the compressor to return oil.

[0032] Furthermore, in an ultra-low temperature working environment, the outdoor heat exchanger cannot absorb heat normally from the atmospheric environment, causing the heat pump to fail to work normally.

[0033] In order to solve the problem that the operating efficiency of the heat pump is greatly reduced due to the low ambient temperature and the compressor has difficulty in oil return, the present application provides a gas-liquid separation device and a heat pump system.

[0034] See also Figure 1-Figure 7 The gas-liquid separation device includes a cylinder 100, a diverter plate 300, a partition assembly 400 and an outlet pipe 500. The cylinder 100 is provided with an inner cavity 110. The partition assembly 400 is arranged in the inner cavity 110 and divides the inner cavity 110 into an inlet cavity 111, an outlet cavity 112, a separation cavity 113, a heat release cavity 114 and a heat absorption cavity 115 distributed in sequence along the axial direction of the cylinder 100. The side wall of the cylinder 100 is provided with a first hot flow channel 120, a first cold flow channel 130, a second hot flow channel 140 and a second cold flow channel 150. The diverter plate 300 is arranged in the inlet cavity 111 to separate the inlet cavity 111 into a hot inlet cavity 1111 and a cold inlet cavity 1112.

[0035] The air outlet pipe 500 is sequentially arranged through the inlet cavity 111 (which may be the hot inlet cavity 1111 or the cold inlet cavity 1112 ), the outlet cavity 112 and the separation cavity 113 , and is connected to the separation cavity 113 .

[0036] The heat inlet chamber 1111 is connected to the separation chamber 113 through the first heat flow channel 120, the heat release chamber 114, the second heat flow channel 140 and the outlet chamber 112 in sequence, so that the refrigerant with higher temperature can enter the separation chamber 113 through the heat inlet chamber 1111, the first heat flow channel 120, the heat release chamber 114, the second heat flow channel 140 and the outlet chamber 112 in sequence.

[0037] The cold inlet chamber 1112 is connected to the separation chamber 113 through the first cold flow channel 130, the heat absorption chamber 115, the second cold flow channel 150 and the outlet chamber 112 in sequence, so that the refrigerant with a lower temperature can enter the separation chamber 113 through the cold inlet chamber 1112, the first cold flow channel 130, the heat absorption chamber 115, the second cold flow channel 150 and the outlet chamber 112 in sequence.

[0038] Since the separation chamber 113, the heat release chamber 114 and the heat absorption chamber 115 are distributed in sequence along the axial direction of the cylinder 100, the heat release chamber 114 is arranged between the separation chamber 113 and the heat absorption chamber 115. At this time, the high-temperature refrigerant in the heat release chamber 114 can transfer heat to the separation chamber 113 and the heat absorption chamber 115 respectively. On the one hand, the oil temperature at the bottom of the separation chamber 113 (the end close to the heat release chamber 114) can be increased and the viscosity can be reduced. In addition, the mutual solubility of the oil and the refrigerant is improved, which is beneficial to the oil return of the compressor. On the other hand, by heating the low-temperature refrigerant, the evaporation pressure of the low-temperature refrigerant is increased, thereby increasing the suction density of the compressor, and increasing the mass and flow rate of the low-temperature refrigerant at the same speed, thereby greatly improving the heating capacity and heating efficiency of the entire heat pump system. On the other hand, the liquid refrigerant in the low-temperature refrigerant absorbs a large amount of heat and vaporizes, avoiding the compressor from being affected by liquid hammer.

[0039] Furthermore, through the heat exchange effect between the low-temperature refrigerant in the heat absorption chamber 115 and the high-temperature refrigerant in the heat release chamber 114, the temperature and flow rate of the high-temperature refrigerant before entering the compressor can be effectively reduced, and the temperature and flow rate of the low-temperature refrigerant before entering the compressor can be effectively increased, so that the temperature and flow rate of the high-temperature refrigerant and the low-temperature refrigerant tend to be balanced.

[0040] Furthermore, compared with the prior art method of heating the low-temperature refrigerant inside the gas-liquid separator through a winding tube, the gas-liquid separation device in the present application is provided with multiple channels and cavities inside its own cylinder 100 to realize heat exchange between the low-temperature refrigerant and the high-temperature refrigerant, which greatly reduces the volume of the gas-liquid separation device and reduces the difficulty of assembling the gas-liquid separation device.

[0041] In summary, the gas-liquid separation device provided in this application can not only solve the problem of a significant decrease in the operating efficiency of the heat pump and difficulty in oil return of the compressor due to the low ambient temperature, but also make the temperature and flow rate of the high-temperature refrigerant and the low-temperature refrigerant tend to be balanced, and greatly reduce the volume and assembly difficulty of the gas-liquid separation device.

[0042] It should be noted that the gas-liquid separation device provided in this application can be used normally and efficiently under the following three working conditions (conventional refrigeration, heating conditions above -10°C, and ultra-low temperature heating conditions below -10°C), specifically:

[0043] Under normal cooling and heating conditions above -10°C, the refrigerant enters the separation chamber 113 from the evaporator and the outdoor heat exchanger (evaporation and heat absorption) through the low-temperature refrigerant channel and enters the compressor through the outlet pipe 500 to ensure the normal operation of the compressor and oil return;

[0044] Under ultra-low temperature heating conditions below -10°C, the refrigerant at the compressor outlet is divided into two parts. One part of the refrigerant enters the indoor condenser to release heat to the passenger compartment, and is throttled and depressurized to flow into the low-temperature refrigerant channel. The other part of the refrigerant directly passes through the bypass expansion valve to throttle and depressurize and enter the high-temperature refrigerant channel.

[0045] In one embodiment, if Figure 1-Figure 4 As shown, the cylinder 100 includes a cylinder body 160 and a bottom plate 170. The cylinder body 160 is cylindrical, and the bottom plate 170 is fixedly connected (including but not limited to clamping, welding and threaded connection) to the bottom of the cylinder body 160 to form an inner cavity 110 with an opening. The opening of the inner cavity 110 is arranged at one end of the cylinder body 160 away from the bottom plate 170.

[0046] It should be noted that, in one embodiment, the barrel 160 may be an integrally formed structure, and the internal flow channels (including the first hot flow channel 120 , the second hot flow channel 140 , the first cold flow channel 130 and the second cold flow channel 150 ) are respectively opened in the barrel 160 by drilling.

[0047] In another embodiment, the barrel 160 can also be divided into an inner barrel and an outer barrel, and a connecting groove is provided on the inner wall of the outer barrel or the outer wall of the inner barrel, and the outer barrel is sleeved on the inner barrel to form multiple internal flow channels, thereby greatly reducing the processing difficulty of the internal flow channels.

[0048] Furthermore, in one embodiment, if Figure 1-Figure 5 As shown, the gas-liquid separation device further includes a cover body 200 , which is disposed on the opening of the inner cavity 110 and connected to the cylinder body 160 .

[0049] It should be noted that if Figure 1-Figure 4 As shown, the air outlet pipe 500 is passed through the cover body 200 and forms an air outlet 210 on the cover body 200, and the cover body 200 is also provided with a hot flow inlet 220 and a cold flow inlet 230, the hot flow inlet 220 is connected to the hot cavity 1111, and the cold flow inlet 230 is connected to the cold cavity 1112.

[0050] In one embodiment, if Figure 3-Figure 5 As shown, the partition assembly 400 includes a first partition 410, a second partition 420, a third partition 430 and a fourth partition 440 distributed in sequence along the axial direction of the cylinder 100. The first partition 410 is arranged between the inlet chamber 111 and the outlet chamber 112. The second partition 420 is arranged between the outlet chamber 112 and the separation chamber 113, and the outlet chamber 112 can be connected to the separation chamber 113 through the through hole 421 on the second partition 420. The third partition 430 is arranged between the separation chamber 113 and the heat release chamber 114. The fourth partition 440 is arranged between the heat release chamber 114 and the heat absorption chamber 115.

[0051] This arrangement reduces the difficulty of assembling the partition assembly 400.

[0052] It should be noted that the first partition plate 410 , the second partition plate 420 , the third partition plate 430 and the fourth partition plate 440 may be welded or clamped to the inner wall of the cylinder 100 respectively.

[0053] Alternatively, the first partition plate 410 and the second partition plate 420 may be welded or clamped to the outer circumference of the outlet pipe 500 , respectively.

[0054] In one embodiment, if Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the first hot flow channel 120 , the first cold flow channel 130 , the second hot flow channel 140 and the second cold flow channel 150 are spaced apart and distributed along the circumference of the cylinder 100 .

[0055] This helps reduce the wall thickness of the barrel 100 and reduces the difficulty of processing the first hot flow channel 120 , the first cold flow channel 130 , the second hot flow channel 140 and the second cold flow channel 150 .

[0056] Furthermore, in one embodiment, if Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the first hot flow channel 120 and the second hot flow channel 140 are arranged opposite to each other along the radial direction of the cylinder 100 , and the first cold flow channel 130 and the second cold flow channel 150 are arranged opposite to each other along the radial direction of the cylinder 100 .

[0057] At this time, the first hot flow channel 120, the heat release cavity 114 and the second hot flow channel 140 form a U-shaped high-temperature refrigerant channel, and the first cold flow channel 130, the heat absorption cavity 115 and the second cold flow channel 150 form a U-shaped low-temperature refrigerant channel.

[0058] Such an arrangement greatly expands the arrangement space of the internal flow channels of the cylinder 100 and prevents the internal flow channels from interfering with each other.

[0059] In another embodiment, the first hot flow channel 120 and the second cold flow channel 150 are distributed along the radial direction of the cylinder 100, and the first hot flow channel 120 is arranged at one end of the side wall of the cylinder 100 close to the inner cavity 110, and the second cold flow channel 150 is arranged at one end of the side wall of the cylinder 100 away from the inner cavity 110.

[0060] The first cold flow channel 130 and the second hot flow channel 140 are distributed along the radial direction of the cylinder 100 , and the second hot flow channel 140 is arranged at one end of the side wall of the cylinder 100 close to the inner cavity 110 , and the first cold flow channel 130 is arranged at one end of the side wall of the cylinder 100 away from the inner cavity 110 .

[0061] In this way, the wall thickness of the cylinder 100 needs to be increased, but the circumferential range of the internal flow channel of the cylinder 100 can be expanded, and the first hot flow channel 120 and the second hot flow channel 140 can also reheat the gaseous refrigerant in the separation chamber 113 to increase the superheat of the gaseous refrigerant.

[0062] In one embodiment, if Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the first hot flow channel 120 includes a plurality of first branch hot runners 121 distributed at intervals along the circumference of the cylinder 100, and the second cold flow channel 150 includes a plurality of second branch cold runners 151 distributed at intervals along the circumference of the cylinder 100. The plurality of first branch hot runners 121 and the plurality of second branch cold runners 151 are alternately arranged along the circumference of the cylinder 100.

[0063] It should be noted that the inner wall of the heat inlet chamber 1111 and the inner wall of the heat release chamber 114 are respectively provided with openings communicating with each first branch hot runner 121 .

[0064] When the high-temperature refrigerant enters each first branch hot runner 121 and the low-temperature refrigerant enters each second branch cold runner 151, since the first branch hot runner 121 and the second branch cold runner 151 are arranged alternately along the circumference of the cylinder 100, the first branch hot runner 121 and the second branch cold runner 151 are arranged adjacent to each other. At this time, the high-temperature refrigerant and the low-temperature refrigerant can undergo heat exchange before entering the bottom wall of the cylinder 100.

[0065] With such an arrangement, the high-temperature refrigerant can transfer part of its heat to the low-temperature refrigerant before entering the heat release chamber 114, so that the temperature of the high-temperature refrigerant drops to a certain extent, and avoids the high-temperature refrigerant with too high a temperature from contacting the bottom wall of the separation chamber 113, causing the liquid refrigerant in the separation chamber 113 to absorb heat too quickly and cause impact boiling (the liquid refrigerant in the separation chamber 113 boils violently and then impacts into the air outlet pipe 500 and finally into the compressor, causing liquid hammer in the compressor). That is, such an arrangement can cleverly avoid damage to the compressor.

[0066] What's even more clever is that in the subsequent circulation process, since the low-temperature refrigerant in the second branch cold runner 151 has absorbed part of the heat when passing through the heat absorption chamber 115, the temperature of the low-temperature refrigerant in the second branch cold runner 151 will not be too low. At this time, the heat loss of the high-temperature refrigerant in the first branch hot runner 121 will not be too much. Therefore, it can be ensured that the temperature of the high-temperature refrigerant in the first branch hot runner 121 drops to a reasonable range. In this way, it can ensure that the subsequent separation chamber 113 will not experience impact boiling, and can also ensure that the low-temperature refrigerant in the heat absorption chamber 115 and the liquid refrigerant in the separation chamber 113 can obtain sufficient heat.

[0067] Furthermore, such a setting can make the heat exchange between the high-temperature refrigerant and the low-temperature refrigerant on the side wall of the cylinder 100 more uniform, and by diverting to each branch channel (including the first branch hot runner 121 and the second branch cold runner 151), the impact of the high-temperature refrigerant and the low-temperature refrigerant can be reduced.

[0068] In one embodiment, if Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the second hot flow channel 140 includes a plurality of second branch hot runners 141 distributed at intervals along the circumference of the cylinder 100, and the first cold flow channel 130 includes a plurality of first branch cold runners 131 distributed at intervals along the circumference of the cylinder 100, and the plurality of second branch hot runners 141 and the plurality of first branch cold runners 131 are alternately arranged along the circumference of the cylinder 100.

[0069] It should be noted that the inner wall of the cold inlet cavity 1112 and the inner wall of the heat absorption cavity 115 are respectively provided with openings communicating with the first branch cold flow channels 131 .

[0070] Since the high-temperature refrigerant in the second branch hot runner 141 has released a large amount of heat in the first branch hot runner 121 and the heat release chamber 114, the temperature of the high-temperature refrigerant in the second branch hot runner 141 will not be too high, which can play a good preheating role for the low-temperature refrigerant in the first branch cold runner 131, and can prevent the temperature of the low-temperature refrigerant in the first branch cold runner 131 from rising too quickly.

[0071] Moreover, such an arrangement further achieves temperature balance between the high-temperature refrigerant and the low-temperature refrigerant.

[0072] In one embodiment, if Figure 3-Figure 5 As shown, the gas-liquid separation device also includes a separation hood 600 arranged in the separation chamber 113. The separation hood 600 is fixedly mounted on one end of the outlet pipe 500 close to the outlet chamber 112, and the opening of the separation hood 600 is facing away from the outlet chamber 112, so that the refrigerant in the form of a gas-liquid mixture entering the separation chamber 113 from the outlet chamber 112 can impact the end of the separation hood 600 away from its own opening.

[0073] The mixed gas-liquid refrigerant first strikes the back of the separation hood 600 (the end away from its opening). The liquid refrigerant then adheres to the separation hood 600 and flows along its edge into the bottom of the separation chamber 113. The gaseous refrigerant then bypasses the outer wall of the separation hood 600 and enters the interior of the separation hood 600 through its opening. This arrangement greatly improves the gas-liquid separation effect and further prevents liquid hammer in the compressor.

[0074] Furthermore, in one embodiment, if Figure 3-Figure 5 As shown, the gas-liquid separation device further includes a separation barrel 700, which is disposed on the side of the separation cover 600 facing away from the outlet cavity 112 and is fixedly sleeved on the outer circumference of the gas outlet pipe 500. The opening of the separation barrel 700 faces toward the separation cover 600, and the end of the gas outlet pipe 500 away from the opening of the separation barrel 700 is provided with a communication hole 510 connected to the separation barrel 700. The inner diameter of the separation cover 600 is larger than the inner diameter of the separation barrel 700, and the separation barrel 700 is connected to the separation cover 600.

[0075] In this way, the gaseous refrigerant must first pass through the separation cover 600 and enter the separation cylinder 700 in order to enter the outlet pipe 500. Since the opening of the separation cylinder 700 is facing the direction close to the outlet cavity 112, that is, the opening of the separation cylinder 700 is facing away from the bottom of the separation cavity 113, at this time, the liquid refrigerant at the bottom of the separation cavity 113 cannot enter the separation cylinder 700, thereby effectively avoiding the occurrence of liquid hammer in the compressor.

[0076] The present application also provides a heat pump system, which includes the gas-liquid separation device described in any one of the above embodiments.

[0077] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

[0079] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0081] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0082] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0083] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A gas-liquid separation device, characterized in that: The invention comprises a cylinder (100), a diverter plate (300), a baffle assembly (400) and an air outlet pipe (500); the cylinder (100) is provided with an inner cavity (110); the baffle assembly (400) is arranged in the inner cavity (110) and divides the inner cavity (110) into an inlet cavity (111), an outlet cavity (112), a separation cavity (113), a heat release cavity (114) and a heat absorption cavity (115) distributed in sequence along the axial direction of the cylinder (100); a first hot flow channel (120), a first cold flow channel (130), a second hot flow channel (140) and a second cold flow channel (150) are provided on the side wall of the cylinder (100); the diverter plate (300) is arranged in the inlet cavity (111) to divide the inlet cavity (111) into a hot inlet cavity (1111) and a cold inlet cavity (1112); The outlet pipe (500) is sequentially arranged in the inlet chamber (111), the outlet chamber (112) and the separation chamber (113), and is connected to the separation chamber (113); the hot inlet chamber (1111) is sequentially connected to the separation chamber (113) through the first hot flow channel (120), the heat release chamber (114), the second hot flow channel (140) and the outlet chamber (112); the cold inlet chamber (1112) is sequentially connected to the separation chamber (113) through the first cold flow channel (130), the heat absorption chamber (115), the second cold flow channel (150) and the outlet chamber (112).

2. The gas-liquid separation device according to claim 1, characterized in that: The first hot flow channel (120) includes a plurality of first branch hot flow channels (121) distributed at intervals along the circumference of the cylinder (100), and the second cold flow channel (150) includes a plurality of second branch cold flow channels (151) distributed at intervals along the circumference of the cylinder (100), and the first branch hot flow channels (121) and the second branch cold flow channels (151) are alternately arranged along the circumference of the cylinder (100).

3. The gas-liquid separation device according to claim 1, characterized in that: The second hot flow channel (140) includes a plurality of second branch hot flow channels (141) distributed at intervals along the circumference of the cylinder (100), and the first cold flow channel (130) includes a plurality of first branch cold flow channels (131) distributed at intervals along the circumference of the cylinder (100), and the second branch hot flow channels (141) and the first branch cold flow channels (131) are alternately arranged along the circumference of the cylinder (100).

4. The gas-liquid separation device according to claim 1, characterized in that: The first hot flow channel (120), the first cold flow channel (130), the second hot flow channel (140) and the second cold flow channel (150) are distributed at intervals along the circumference of the cylinder (100).

5. The gas-liquid separation device according to claim 4, characterized in that: The first hot flow channel (120) and the second hot flow channel (140) are arranged opposite to each other along the radial direction of the cylinder (100), and the first cold flow channel (130) and the second cold flow channel (150) are arranged opposite to each other along the radial direction of the cylinder (100).

6. The gas-liquid separation device according to claim 1, characterized in that: The first hot flow channel (120) and the second cold flow channel (150) are distributed along the radial direction of the cylinder (100), and the first hot flow channel (120) is arranged at one end of the side wall of the cylinder (100) close to the inner cavity (110), and the second cold flow channel (150) is arranged at one end of the side wall of the cylinder (100) away from the inner cavity (110); The first cold flow channel (130) and the second hot flow channel (140) are distributed along the radial direction of the cylinder (100), and the second hot flow channel (140) is arranged at an end of the side wall of the cylinder (100) close to the inner cavity (110), and the first cold flow channel (130) is arranged at an end of the side wall of the cylinder (100) away from the inner cavity (110).

7. The gas-liquid separation device according to claim 1, characterized in that: It also includes a separation cover (600) arranged in the separation chamber (113), the separation cover (600) is fixedly mounted on one end of the outlet pipe (500) close to the outlet chamber (112), and the opening of the separation cover (600) faces away from the outlet chamber (112), so that the refrigerant in the form of a gas-liquid mixture entering the separation chamber (113) from the outlet chamber (112) can impact the end of the separation cover (600) away from its own opening.

8. The gas-liquid separation device according to claim 7, characterized in that: The invention also includes a separation cylinder (700) connected to the separation cover (600), wherein the separation cylinder (700) is arranged on the side of the separation cover (600) away from the outlet cavity (112) and is fixedly sleeved on the outer peripheral side of the air outlet pipe (500), the opening of the separation cylinder (700) faces the direction close to the separation cover (600), and the inner diameter of the separation cover (600) is larger than the inner diameter of the separation cylinder (700), and the end of the air outlet pipe (500) away from the opening of the separation cylinder (700) is provided with a connecting hole (510) connected to the separation cylinder (700).

9. The gas-liquid separation device according to claim 1, characterized in that: The baffle assembly (400) includes a first baffle (410), a second baffle (420), a third baffle (430) and a fourth baffle (440) which are sequentially distributed along the axial direction of the cylinder (100); the first baffle (410) is arranged between the inlet chamber (111) and the outlet chamber (112); the second baffle (420) is arranged between the outlet chamber (112) and the separation chamber (113); and the outlet chamber (112) can be connected to the separation chamber (113) through the through hole (421) on the second baffle (420); the third baffle (430) is arranged between the separation chamber (113) and the heat release chamber (114); and the fourth baffle (440) is arranged between the heat release chamber (114) and the heat absorption chamber (115).

10. A heat pump system, characterized in that: It comprises a gas-liquid separation device as described in any one of claims 1 to 9.

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