Heat exchanger and heat exchange system

Abstract

The application discloses a heat exchange device and a heat exchange system. The heat exchange device comprises a cavity, a chamber and a partition plate are arranged in the cavity, the partition plate divides the chamber into a heat exchange chamber and a gas-liquid separation chamber, the gas-liquid separation chamber is located above the heat exchange chamber, a heat exchange pipe is arranged in the heat exchange chamber, the heat exchange pipe is formed with a plurality of heat exchange layers, the plurality of heat exchange layers are arranged along the up-down direction of the heat exchange chamber, the partition plate comprises a first plate and a second plate, the position of the first plate is higher than that of the second plate, the first plate is provided with a gas passage, the gas passage is communicated with the heat exchange chamber and the gas-liquid separation chamber, the second plate is provided with a liquid return hole, and the liquid return hole is communicated with the heat exchange chamber and the gas-liquid separation chamber. In the heat exchange device, the plurality of heat exchange layers are arranged in the heat exchange chamber along the up-down direction of the heat exchange chamber, the heat exchange efficiency between the refrigerant and the heat exchange pipe can be ensured, the heat flow density can be more concentrated under the same cooling capacity, the occupied area is smaller, and meanwhile, the gas-liquid separation chamber is arranged above the heat exchange chamber, so that the risk of liquid entrainment in suction can be reduced or eliminated.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and particularly to a heat exchanger and a heat exchange system. Background Technology

[0002] The working principle of a falling film heat exchanger is that refrigerant flows through the tank and is poured onto the heat exchange tubes from top to bottom, while water flows inside the heat exchange tubes. In related technologies, the heat exchange tubes inside falling film heat exchangers are all straight tubes, resulting in a long heat exchanger, a large footprint, and making it difficult to move the equipment. Summary of the Invention

[0003] The present invention provides a heat exchange device and a heat exchange system.

[0004] A heat exchange device according to an embodiment of the present invention includes:

[0005] The cavity has a chamber and a partition, which divides the chamber into a heat exchange chamber and a gas-liquid separation chamber, with the gas-liquid separation chamber located above the heat exchange chamber.

[0006] A heat exchange tube is disposed inside the heat exchange cavity, and the heat exchange tube forms multiple heat exchange layers, which are arranged along the vertical direction of the heat exchange cavity.

[0007] The partition includes a first plate and a second plate, with the first plate positioned higher than the second plate. The first plate has a vent hole that connects the heat exchange chamber and the gas-liquid separation chamber. The second plate has a return liquid hole that connects the heat exchange chamber and the gas-liquid separation chamber.

[0008] In the above-mentioned heat exchange device, the multiple heat exchange layers are arranged in the heat exchange cavity along the vertical direction, which can ensure the heat exchange efficiency between the refrigerant and the heat exchange tube. Under the same cooling capacity, the heat flux density can be more concentrated and the footprint is smaller. At the same time, the gas-liquid separation chamber is located above the heat exchange cavity, which can reduce or eliminate the risk of gas and liquid carryover.

[0009] In some embodiments, the heat exchange layer is disc-shaped.

[0010] In some embodiments, the first plate and the second plate are arranged in parallel, and the second plate is connected to the first plate along the circumference of the first plate via a connecting plate.

[0011] In some embodiments, the connecting plate is perpendicularly connected to the first plate and the second plate.

[0012] In some embodiments, the second plate is connected to the inner wall of the gas-liquid separation chamber along the circumference of the cavity, and the connecting plate, the second plate, and the inner wall of the gas-liquid separation chamber together form a liquid storage tank, which is connected to the return liquid hole.

[0013] In some embodiments, the heat exchange device further includes a gas pipe communicating with the gas-liquid separation chamber, wherein the gas pipe and the vent are located on opposite sides of the gas-liquid separation chamber.

[0014] In some embodiments, the heat exchange device further includes a liquid infusion pipe located in the middle of the cavity, the heat exchange tube being arranged around the liquid infusion pipe, and the liquid infusion pipe having an outlet that communicates with the heat exchange cavity.

[0015] In some embodiments, the outlet is located at the bottom of the sidewall of the infusion tube.

[0016] In some embodiments, the heat exchange device further includes a liquid level sensor for detecting the liquid level height in the heat exchange chamber, the liquid level height being used as data to control the operation of the throttle valve.

[0017] In some embodiments, the heat exchange device further includes a pressure relief valve connected to the airflow separation chamber.

[0018] A heat exchange system according to an embodiment of the present invention includes:

[0019] The heat exchange device described in any of the above embodiments.

[0020] In the above-mentioned heat exchange system, the multiple heat exchange layers are arranged in the heat exchange cavity along the vertical direction, which can ensure the heat exchange efficiency between the refrigerant and the heat exchange tube. Under the same cooling capacity, the heat flux density can be more concentrated and the footprint is smaller. At the same time, the gas-liquid separation chamber is located above the heat exchange cavity, which can reduce or eliminate the risk of gas and liquid carryover.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the heat exchange device according to an embodiment of the present invention;

[0024] Figure 2 This is another structural schematic diagram of the heat exchange device according to an embodiment of the present invention;

[0025] Figure 3 This is another structural schematic diagram of the heat exchange device according to an embodiment of the present invention;

[0026] Figure 4 This is a top view of the partition according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the piping connection of the heat exchange system according to an embodiment of the present invention;

[0028] Figure 6 This is another pipeline connection diagram of the heat exchange system according to an embodiment of the present invention. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] This disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described herein. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0034] Please see Figures 1 to 6 , Figure 1 This is a schematic diagram of the structure of the heat exchange device 100 according to an embodiment of the present invention; Figure 2 This is another structural schematic diagram of the heat exchange device 100 according to an embodiment of the present invention; Figure 3 This is another structural schematic diagram of the heat exchange device 100 according to an embodiment of the present invention; Figure 4 This is a top view of the partition 30 according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the piping connection of the heat exchange system 200 according to an embodiment of the present invention; Figure 6 This is another pipeline connection diagram of the heat exchange system 200 according to an embodiment of the present invention.

[0035] A heat exchange device 100 according to an embodiment of the present invention includes a cavity 10 and heat exchange tubes 23. Support feet 14 can be provided at the bottom of the cavity 10 for placing the heat exchange device 100. The cavity 10 contains a chamber 20 and a partition 30, which divides the chamber 20 into a heat exchange chamber 21 and a gas-liquid separation chamber 22, with the gas-liquid separation chamber 22 located above the heat exchange chamber 21. The heat exchange tubes 23 are disposed within the heat exchange chamber 21 and have multiple heat exchange layers 24 arranged vertically along the heat exchange chamber 21.

[0036] The partition 30 includes a first plate 31 and a second plate 32. The first plate 31 is positioned higher than the second plate 32. The first plate 31 is provided with a vent 33, which connects the heat exchange chamber 21 and the gas-liquid separation chamber 22. The second plate 32 is provided with a return liquid hole 34, which connects the heat exchange chamber 21 and the gas-liquid separation chamber 22.

[0037] In the heat exchange device 100 described above, multiple heat exchange layers 24 are arranged in the heat exchange cavity 21 along the vertical direction, which can ensure the heat exchange efficiency between the refrigerant and the heat exchange tube 23, make the heat flux density more concentrated under the same cooling capacity, and have a smaller footprint. At the same time, the gas-liquid separation chamber 22 is located above the heat exchange cavity 21, which can reduce or eliminate the risk of gas and liquid carryover.

[0038] Specifically, see Figure 1 The heat exchange device 100 in this embodiment may include a vertical flooded heat exchanger. The working principle of the heat exchange device 100 is that the heat exchange chamber 21 carries the refrigerant, and the heat exchange tube 23 carries the medium to be exchanged, such as water, air, or oil. The cavity 10 is the place where the entire heat exchange process takes place. The heat exchange chamber 21 supplies the refrigerant to exchange heat through the heat exchange tube 23. Designing multiple heat exchange layers 24 can ensure the heat exchange efficiency between the refrigerant and the heat exchange tube 23, making the heat flux density more concentrated and having a smaller footprint. Understandably, the gas-liquid separation chamber 22 is used to achieve gas-liquid separation. The partition 30 divides the cavity 10 into the lower heat exchange chamber 21 and the upper gas-liquid separation chamber 22.

[0039] See Figure 1 and Figure 4 During operation, gaseous refrigerant can enter the gas-liquid separation chamber 22 through the vent 33. The gaseous refrigerant releases liquid refrigerant in the gas-liquid separation chamber 22. Since the position of the first plate 31 is higher than that of the second plate 32, the liquid refrigerant accumulated on the first plate 31 can flow to the second plate 32 under the action of gravity. After the liquid refrigerant reaches a certain amount, it enters the heat exchange chamber 21 below through the return liquid hole 34 under the action of gravity, thus avoiding the liquid refrigerant from clogging the vent 33 and affecting the gas-liquid separation effect.

[0040] In one embodiment, a heat exchange tube 23 can be arranged in a spiral shape to form multiple heat exchange layers 24, which are arranged axially in the heat exchange cavity 21 along the cavity 10. Within a single heat exchange layer 24, there are radial gaps between the tubes, allowing the refrigerant to flow continuously downwards under gravity. The gaps between the tubes 23 of adjacent heat exchange layers 24 are respectively blocked by the tubes 23 of the adjacent layer. This increases the contact area between the refrigerant and the heat exchange tubes 23, improving the heat exchange efficiency of the heat exchange device 100 in this embodiment, resulting in a more concentrated heat flux density and a smaller footprint.

[0041] In some embodiments, the heat exchange layer 24 is disc-shaped. This facilitates the arrangement of multiple heat exchange layers 24 along the vertical direction of the heat exchange cavity 21.

[0042] In one embodiment, all heat exchange layers 24 may be arranged in a disc shape by spirally winding one or more heat exchange tubes 23. In one embodiment, a heat exchange layer 24 may be arranged in a disc shape by spirally winding one heat exchange tube 23.

[0043] exist Figure 1 In the illustrated embodiment, a heat exchange tube 23 can be coiled into two heat exchange layers 24, with one end connected to the inlet pipe 151 and the other end connected to the outlet pipe 152. It is understood that in other embodiments, a heat exchange tube 23 can also be coiled into three, four, or other numbers of heat exchange layers 24, which can be adjusted according to specific circumstances and is not specifically limited here.

[0044] The heat exchange tubes 23 inside the heat exchange chamber 21 form a disc-shaped heat exchange layer 24, which can concentrate the heat flux density and facilitate the uniform distribution of the refrigerant.

[0045] Specifically, see Figure 1 and Figure 3 Water pipe 15 is located outside heat exchange chamber 21. Water pipe 15 includes inlet pipe 151 and outlet pipe 152. One end of heat exchange pipe 23 can be connected to inlet pipe 151, and the other end can be connected to outlet pipe 152. Hot water can flow through inlet pipe 151, and cold water after heat exchange through heat exchange pipe 23 can flow through outlet pipe 152. Thus, hot water in inlet pipe 151 can be heat exchanged through heat exchange pipe 23 to form cold water. Of course, cold water can flow through inlet pipe 151, and hot water after heat exchange through heat exchange pipe 23 can flow through outlet pipe 152. Thus, cold water in inlet pipe 151 can be heat exchanged through heat exchange pipe 23 to form hot water. In the embodiment shown in the figure, one heat exchange pipe 23 can be wound into two heat exchange layers 24, one end connected to inlet pipe 151 and the other end connected to outlet pipe 152.

[0046] exist Figure 1 In the illustrated embodiment, two adjacent heat exchange layers 24 are spaced apart from each other, and the distance between two adjacent heat exchange layers 24 can be represented by D1; within a heat exchange layer 24, there is a gap between the tubes along the radial direction, represented by D2. When the liquid refrigerant is immersed in the heat exchange layer 24, the gap ensures that the liquid refrigerant can quickly enter the space between adjacent heat exchange layers 24, and the space between two tubes in the same heat exchange layer 24, so that the entire heat exchange tube 23 can be immersed in the liquid refrigerant.

[0047] In some embodiments, the first plate 31 and the second plate 32 are arranged in parallel, and the second plate 32 is connected to the first plate 31 along the circumference of the first plate 31 via a connecting plate 35. This improves the overall stability of the first plate 31 and the second plate 32.

[0048] Specifically, see Figure 1 and Figure 4 Vent holes 33 and liquid return holes 34 are respectively provided on the first plate 31 and the second plate 32 to connect the heat exchange chamber 21 and the gas-liquid separation chamber 22. The first plate 31 and the second plate 32 are arranged in parallel. The first plate 31 is connected by a connecting plate 35 arranged on the second plate 32 along the circumference of the first plate 31, which can improve the overall stability of the first plate 31 and the second plate 32.

[0049] See Figure 4 In the illustrated embodiment, the first plate 31 and the second plate 32 are two circular plates, placed concentrically. A through hole 17 is provided at the center of the first plate 31 for the infusion tube 11 to pass through. The first plate 31 has three vertically arranged rows of vent holes 33, and the second plate 32 has one row of arc-shaped return holes 34. The vent holes 33 and return holes 34 are located on the same side of the partition plate 30. Both the vent holes 33 and the return holes 34 are circular holes; there are 22 vent holes 33 and 9 return holes 34. It is understood that the present invention does not specifically limit the number or shape of the vent holes 33 and the return holes 34, and the specific number and shape can be determined according to actual needs.

[0050] In some embodiments, the connecting plate 35 is vertically connected to the first plate 31 and the second plate 32. This reduces the space occupied by the partition plate 30, making the heat exchange device 100 more compact.

[0051] Specifically, in one embodiment, the partition 30 can be an integral structural component, that is, the first plate 31, the second plate 32 and the connecting plate 35 are connected to form an integral structure, and the integral structural component has high structural strength.

[0052] In some embodiments, the second plate 32 is circumferentially connected to the inner wall of the gas-liquid separation chamber 22 along the cavity 10. The connecting plate 35, the second plate 32, and the inner wall of the gas-liquid separation chamber 22 together form a liquid storage tank 26, which is connected to the return liquid hole 34. In this way, it can prevent liquid refrigerant from flowing back to the heat exchange chamber 21 through the vent hole 33, thus affecting the delivery of gaseous refrigerant.

[0053] Specifically, see Figure 1 and Figure 2 The second plate 32 is positioned lower than the first plate 31. The liquid storage tank 26 can store a certain amount of liquid to prevent the liquid refrigerant from flowing back to the vent 33 in time due to insufficient return at the second plate 32, which would cause the liquid refrigerant to flow to the vent 33 and block the vent 33.

[0054] In some embodiments, the heat exchange device 100 further includes a gas pipe 27 communicating with the gas-liquid separation chamber 22, with the gas pipe 27 and the vent 33 located on opposite sides within the gas-liquid separation chamber 22, respectively. This lengthens the flow path of the gaseous refrigerant within the gas-liquid separation chamber 22, thereby improving the gas-liquid separation effect.

[0055] Specifically, see Figure 1 In the diagram, vent 33 is located on the lower left side of the gas-liquid separation chamber 22, and vent pipe 27 is located on the upper right side of the gas-liquid separation chamber 22. Gaseous refrigerant entering through vent 33 diffuses from the lower left to the upper right, with the flow path being essentially the longest. It is understood that in other embodiments, vent pipe 27 and vent 33 can be located in other positions, not limited to the embodiment shown in the diagram. Vent pipe 27 can be connected to a compressor, and gaseous refrigerant can return to the compressor via vent pipe 27.

[0056] In some embodiments, the heat exchange device 100 further includes a liquid inlet pipe 11, which is located in the middle of the cavity 10. The heat exchange tube 23 is arranged around the liquid inlet pipe 11, and the liquid inlet pipe 11 has a liquid outlet 12 that connects to the heat exchange cavity 21. In this way, it can be ensured that the liquid refrigerant can immerse the heat exchange tube 23, thereby improving the heat exchange efficiency.

[0057] Specifically, see Figure 1 Liquid refrigerant can be introduced through the infusion pipe 11. After the liquid refrigerant arrives at the outlet 12, it flows out of the infusion pipe 11 and into the heat exchange chamber 21, immersing the heat exchange tubes 23 and exchanging heat with them. After the liquid refrigerant flows out of the outlet 12, under the action of gravity, the liquid refrigerant first immerses the heat exchange tubes 23 from the bottom of the heat exchange chamber 21.

[0058] In some embodiments, the outlet 12 is located at the bottom of the side wall of the infusion pipe 11. In this way, the liquid refrigerant can flow directly from the outlet 12 to the vicinity of the bottom of the heat exchange chamber 21, immersing the heat exchange tube 23 and enabling rapid initiation of heat exchange.

[0059] In some embodiments, an inlet pipe 13 is connected to the top end of the infusion pipe 11. This allows the infusion pipe 11 to hold more liquid refrigerant, ensuring the continuity of the heat exchange process. In the illustrated embodiment, the inlet pipe 13 is connected to the top end of the infusion pipe 11, and the outlet 12 is located at the bottom of the side wall of the infusion pipe 11.

[0060] exist Figure 1 In this embodiment, the infusion pipe 11 connects the top and bottom walls of the chamber 10 and can also support the chamber 10, making the structure of the heat exchange device 100 stable.

[0061] exist Figure 2In this embodiment, the liquid inlet pipe 13 is connected to the outside of the cavity 10. Liquid refrigerant enters the heat exchange cavity 21 through the liquid inlet pipe 13 and flows to the bottom of the heat exchange cavity 21, immersing the heat exchange layer 24 from the bottom of the heat exchange cavity 21. A support member 16 is provided in the middle of the heat exchange cavity 21. The support member 16 connects the first plate 31 and the bottom wall of the heat exchange cavity 21, and the support member 16 can provide support for the cavity 10. Figure 2 In this embodiment, the support member 16 is cylindrical. It is understood that in other embodiments, the support member 16 may be of other shapes or may be a solid support member 16.

[0062] It should be noted that the heat exchange tube 23 is coiled on the support 16 and located inside the heat exchange chamber 21, resulting in a small flow cross-sectional area inside the heat exchange chamber 21. The gaseous refrigerant generated by evaporation flows at a relatively fast velocity inside the heat exchange chamber 21. If the gaseous refrigerant returns directly to the compressor at this time, it will increase the risk of liquid compression in the compressor and damage the compressor. By setting up a gas-liquid separation chamber, gas-liquid separation can be performed to reduce the risk of liquid carryover.

[0063] In some embodiments, the heat exchange device 100 further includes a liquid level sensor 28, which detects the liquid level height within the heat exchange chamber 21. The liquid level height is used as data to control the operation of the throttle valve. This prevents excessive liquid refrigerant in the heat exchange chamber 21 from affecting the heat exchange effect.

[0064] Specifically, the heat exchange device 100 is equipped with a liquid level sensor 28 and a throttling valve (such as an electronic expansion valve). The liquid level sensor 28 is located at the upper part of the heat exchange chamber 21, near the partition plate 30. The total amount of liquid refrigerant flowing out of the outlet 12 can be adjusted in conjunction with the liquid level sensor 28 and the throttling valve, thereby achieving a full falling film heat exchange effect. The heat exchange system 200 can adjust the amount of liquid refrigerant in the heat exchange chamber 21 according to the liquid level height data from the liquid level sensor 28, thereby optimizing the heat exchange effect. The relationship between the heat exchange effect and the liquid level height can be preset, calibrated, and stored.

[0065] The position of the liquid level sensor 28 is not limited; it can be placed at the bottom of the heat exchange chamber 21 or in the middle of the heat exchange chamber 21. Figure 1 and Figure 2 The diagram shows the liquid level sensor 28 positioned in the middle. The liquid level height required to trigger the throttle valve can be calibrated based on the position and height of the liquid level sensor 28.

[0066] In some embodiments, the heat exchanger 100 further includes a pressure relief valve 29, which is connected to the airflow separation chamber 22. This ensures the safe and normal operation of the heat exchanger 100.

[0067] Specifically, the side wall of the gas-liquid separation chamber 22 is provided with an installation port, and the pressure relief valve 29 is installed at the installation port. The pressure relief valve 29 is preset with a first threshold and a second threshold, the first threshold being less than or equal to the second threshold. When the gas pressure in the gas-liquid separation chamber 22 is less than the first threshold, the pressure relief valve 29 is in a closed state, and when the gas pressure in the gas-liquid separation chamber 22 is greater than the second threshold, it is in a conducting state, which can relieve pressure in the gas-liquid separation chamber 22, thereby ensuring the safe and normal operation of the heat exchange device 100.

[0068] A heat exchange system 200 according to an embodiment of the present invention includes a heat exchange device 100 according to any of the above embodiments.

[0069] The aforementioned heat exchange system 200, by arranging the heat exchange tubes 23 in a multi-turn, can ensure the heat exchange efficiency between the refrigerant and the heat exchange tubes 23, and can make the heat flux density more concentrated under the same cooling capacity, while also having a smaller footprint.

[0070] Specifically, the heat exchange system 200 can be a system with or without oil return requirements. The liquid level in the heat exchange device 100 is controlled at a certain height through the linkage between the liquid level sensor 28 and the electronic expansion valve. For systems with lubricating oil, an oil return hole is opened at the bottom, and the oil in the heat exchange device 100 is returned to the compressor by ejector oil return, ensuring the safe operation of the compressor.

[0071] It should be noted that the lubricating oil inside compressor 47 mixes with the refrigerant and is discharged from the outlet of compressor 47, becoming a high-temperature, high-pressure liquid lubricating oil. This liquid releases heat in condenser 49 and is then throttled by the electronic expansion valve into a low-temperature, low-pressure liquid lubricating oil, which ultimately enters the heat exchanger 100 along with the low-temperature, low-pressure liquid refrigerant. In the heat exchanger 100, the liquid refrigerant becomes a gaseous refrigerant after heat exchange. The gaseous refrigerant returns to compressor 47 via gas pipe 27, while the liquid lubricating oil accumulates in the heat exchanger 100 and returns to compressor 47 via oil return pipe 50.

[0072] In heat exchange system 200, which requires oil return, please refer to... Figure 5 The compressor 47 is used to raise the low-temperature, low-pressure gas entering the compressor 47 from the inlet to a high-temperature, high-pressure gas and discharge it from the outlet of the compressor 47. The temperature sensor 46 can detect the temperature of the gaseous refrigerant at the inlet and outlet of the compressor 47 to ensure the normal operation of the compressor 47. The low-temperature, low-pressure gaseous refrigerant is compressed by the compressor 47 and transformed into a high-temperature, high-pressure gaseous refrigerant, which flows from the outlet of the compressor 47 to the condenser 49. In the condenser 49, heat is released and the refrigerant is transformed into liquid refrigerant. The heat released by the refrigerant in the condenser 49 is absorbed by room-temperature water. After absorbing heat, the water is pumped into the cooling tower 43 to release heat. After being cooled, the water is pumped back into the condenser 49 by the first water pump 45 to participate in heat exchange.

[0073] High-temperature, high-pressure liquid refrigerant is throttled by electronic expansion valve 44 into low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then enters heat exchange chamber 21 and exchanges heat with heat exchange tube 23. The resulting low-temperature chilled water is then pumped to user terminal 42. User terminal 42 can be a fan coil unit or other equipment. In some embodiments, a second water pump 41 can pump water into heat exchange device 100 to exchange heat with the liquid refrigerant. The second water pump 41 can also pump the water after heat exchange with the liquid refrigerant out of heat exchange device 100 for use by user terminal 42. In some embodiments, heat exchange system 200 also includes oil return line 50, through which lubricating oil in heat exchange device 100 is returned to compressor 47 using an ejector oil return method.

[0074] In heat exchange system 200 where there is no need for oil return, please refer to... Figure 6 The compressor 47 is used to raise the low-temperature, low-pressure gas entering the compressor 47 from its inlet to a high-temperature, high-pressure gas, which is then discharged from the compressor 47's outlet. The temperature sensor 46 detects the temperature of the gaseous refrigerant at the compressor 47's inlet and outlet, ensuring the compressor 47 operates normally. The low-temperature, low-pressure gaseous refrigerant is compressed by the compressor 47, transforming into a high-temperature, high-pressure gaseous refrigerant that flows from the compressor 47's outlet to the condenser 49. In the condenser 49, heat is released, converting the refrigerant into liquid refrigerant. The heat released by the refrigerant in the condenser 49 is absorbed by room-temperature water. After absorbing heat, the water is pumped by the first water pump 45 into the cooling tower 43 to release heat. After being cooled, the water is pumped back into the condenser 49 by the first water pump 45 to participate in heat exchange. The high-temperature, high-pressure liquid refrigerant is throttled by the electronic expansion valve 44 into a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant finally enters the heat exchange chamber 21 and exchanges heat with the heat exchange tubes 23. The resulting low-temperature chilled water can be pumped to the user terminal 42. In some embodiments, the second water pump 41 can pump water into the heat exchange device 100 to exchange heat with the liquid refrigerant. The second water pump 41 can also pump the water after exchanging heat with the liquid refrigerant out of the heat exchange device 100 for use by the user terminal 42.

[0075] More specifically, the heat exchange device 100 of the present invention can be implemented with reference to the following examples. It should be noted that the following examples are only for the convenience of understanding and implementing the technical solution of the present invention, and should not be construed as limiting the scope of protection of the present invention.

[0076] Water is transported within heat exchange tube 23, while refrigerant flows within cavity 10. The high-temperature, high-pressure gaseous refrigerant discharged from compressor 47 is cooled into low-temperature, high-pressure liquid refrigerant by condenser 49. After passing through electronic expansion valve 44, it is throttled into low-temperature, low-pressure liquid refrigerant. The liquid refrigerant enters heat exchange cavity 22 through inlet pipe 13 of heat exchange device 100, where it undergoes heat exchange. Gaseous refrigerant generated during heat exchange enters gas-liquid separation cavity 22 through vent hole 33 on the first plate 31 of partition 30, preventing excessive liquid carryover. The gas-liquid separation chamber 22 is a hollow cavity. After the gaseous refrigerant enters the gas-liquid separation chamber 22, its flow rate slows down, and the gas and liquid are separated. The gaseous refrigerant that has passed through the gas pipe 27 of the gas-liquid separation chamber 22 returns to the compressor 47, while the liquid refrigerant remains in the liquid storage tank 26 under the action of gravity, and then flows back to the heat exchange chamber 21 through the liquid return hole 34 on the second plate 32, where it continues to exchange heat with the heat exchange tube 23. The low-temperature chilled water generated after heat exchange can be supplied to the user terminal 42 through the second water pump 41. When the internal pressure of the heat exchange device 100 is too high, the gaseous refrigerant will be depressurized through the pressure relief valve 29 to ensure safety.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat exchange device, characterized in that, include: The cavity has a chamber and a partition, which divides the chamber into a heat exchange chamber and a gas-liquid separation chamber, with the gas-liquid separation chamber located above the heat exchange chamber. A heat exchange tube is disposed inside the heat exchange cavity, and the heat exchange tube forms multiple heat exchange layers, which are arranged along the vertical direction of the heat exchange cavity. The partition includes a first plate and a second plate. The first plate is positioned higher than the second plate. The first plate has a vent hole that connects the heat exchange chamber and the gas-liquid separation chamber. The second plate has a return liquid hole that connects the heat exchange chamber and the gas-liquid separation chamber. The first plate and the second plate are arranged in parallel. The second plate is connected to the first plate along the circumference of the first plate via a connecting plate. The heat exchange device also includes a gas pipe that connects to the gas-liquid separation chamber, and the gas pipe and the vent are located on opposite sides of the gas-liquid separation chamber, respectively. An infusion tube is located in the middle of the cavity, and a heat exchange tube is arranged around the infusion tube. The infusion tube has an outlet that communicates with the heat exchange cavity.

2. The heat exchange device according to claim 1, characterized in that, The heat exchange layer is disc-shaped.

3. The heat exchange device according to claim 1, characterized in that, The connecting plate is perpendicularly connected to the first plate and the second plate.

4. The heat exchange device according to claim 1, characterized in that, The second plate is connected to the inner wall of the gas-liquid separation chamber along the circumference of the cavity. The connecting plate, the second plate, and the inner wall of the gas-liquid separation chamber together form a liquid storage tank, which is connected to the return liquid hole.

5. The heat exchange device according to claim 1, characterized in that, The outlet is located at the bottom of the side wall of the infusion tube.

6. The heat exchange device according to claim 1, characterized in that, The heat exchange device also includes a liquid level sensor, which is used to detect the liquid level height in the heat exchange chamber, and the liquid level height is used as data to control the operation of the throttle valve.

7. The heat exchange device according to claim 1, characterized in that, The heat exchange device also includes a pressure relief valve, which is connected to the gas-liquid separation chamber.

8. A heat exchange system, characterized in that, include: The heat exchange device according to any one of claims 1-7.

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