Overheating component, heat exchanger, and refrigeration system

Abstract

The present disclosure provides an overheating elimination component, a heat exchanger, and a refrigeration system. The overheating elimination component includes: a partition wall that encloses an overheating elimination chamber, and an overheating elimination chamber inlet and an overheating elimination chamber outlet that are communicated with the overheating elimination chamber are provided on the partition wall; and a first heat exchange tube, at least a partial pipe section of the first heat exchange tube is located in the overheating elimination chamber to cool the gaseous working medium entering the overheating elimination chamber.

Description

Technical Field

[0001] The present disclosure relates to the technical field of heat exchange equipment, and particularly to a superheat removal component, a heat exchanger, and a refrigeration system. Background Art

[0002] In some refrigeration systems, for example, in the refrigeration system of commercial water-cooled units, the high-temperature and high-pressure refrigerant gas discharged from the compressor is in a superheated state. Therefore, the refrigerant at the inlet of the condenser of the refrigeration system is generally also in a superheated state. The superheated refrigerant gas first undergoes single-phase sensible heat exchange (superheat removal heat exchange) in the shell of the condenser, and the refrigerant gas is cooled from the superheated state to the saturated state. Then, the saturated refrigerant gas undergoes latent heat exchange and is transformed into saturated liquid refrigerant. The heat transfer intensity of latent heat exchange is 10 to 20 times that of single-phase sensible heat exchange, and the heat transfer coefficient of latent heat exchange can reach 10 kw / (m 2 *K).

[0003] Although the heat transfer amount of superheat removal heat exchange only accounts for about 6% of the total heat transfer amount of the condenser, due to the low heat transfer intensity of single-phase sensible heat exchange, more than 18% of the heat transfer area of the condenser is required for superheat removal heat exchange, which hinders the further improvement of the energy efficiency and cost optimization of the condenser, such as the horizontal condenser used in commercial water chillers. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a superheat removal component, a heat exchanger, and a refrigeration system, aiming to solve the problem of low heat transfer intensity of single-phase sensible heat exchange in the heat exchanger.

[0005] The first aspect of the present disclosure provides a superheat removal component, including:

[0006] A partition wall that encloses a superheat removal cavity, and a superheat removal cavity inlet and a superheat removal cavity outlet that communicate with the superheat removal cavity are provided on the partition wall; and

[0007] A first heat exchange tube, at least a part of the tube section of which is located in the superheat removal cavity to cool the gaseous working medium entering the superheat removal cavity; wherein,

[0008] ;

[0009] α is the product of the logarithmic mean temperature difference and the heat transfer area, and the value range of α is 10 to 100, with the unit of m 2 *K;

[0010] m is the number of the first heat exchange tubes;

[0011] D is the outer diameter of the first heat exchange tube, with the unit of m;

[0012] L is the length of the pipe section of the first heat exchange pipe located in the superheat removal chamber, with the unit of m;

[0013] T in is the temperature of the gaseous working medium entering the superheat removal chamber, with the unit of K;

[0014] T out is the temperature of the gaseous working medium flowing out of the superheat removal chamber, with the unit of K;

[0015] T wall is the average temperature of the outer surface of the pipe section of the first heat exchange pipe located in the superheat removal chamber, with the unit of K.

[0016] In the superheat removal component of some embodiments, the superheat removal component includes a gas distribution plate having a plurality of gas equalizing holes. The gas distribution plate is located in the superheat removal chamber and is arranged between the inlet and the outlet of the superheat removal chamber. At least a part of the pipe section of the first heat exchange pipe is located between the gas distribution plate and the outlet of the superheat removal chamber.

[0017] In the superheat removal component of some embodiments, the gas distribution plate includes a gas distribution plate main body facing the inlet of the superheat removal chamber. The gas distribution plate main body includes a baffle area opposite to the inlet of the superheat removal chamber and an orifice plate area connected to the baffle area. The gas equalizing holes are located on the orifice plate area.

[0018] In the superheat removal component of some embodiments, among the plurality of gas equalizing holes, both sides of the baffle area of the gas distribution plate main body respectively have two groups of gas equalizing holes along the direction from the baffle area to the orifice plate area. The diameter φ of the gas equalizing holes in the group of gas equalizing holes close to the baffle area 3 is smaller than the diameter φ of the gas equalizing holes in the group of gas equalizing holes far from the baffle area 4 .

[0019] In the superheat removal component of some embodiments, the orifice plate area includes two groups of gas equalizing holes. The diameter φ of the gas equalizing holes in the group of gas equalizing holes close to the baffle area 3 and the diameter φ of the gas equalizing holes in the group of gas equalizing holes far from the baffle area 4 satisfy 1.5φ 3 ≤φ 4 ≤5φ 3 .

[0020] In the superheat removal component of some embodiments, the pressure drop ΔP of the gaseous working medium flowing through the superheat removal component is:

[0021] ;

[0022] ;

[0023] ρ is the density of the gaseous working medium at the inlet of the gaseous working medium, with the unit of kg / m 3 ;

[0024] v is the flow velocity of the gaseous working medium at the inlet of the gaseous working medium, with the unit of m / s;

[0025] φ 1 is the diameter of the inlet of the superheat removal chamber;

[0026] n 1 is the number of evenly distributed holes in the evenly distributed hole group with the evenly distributed hole diameter of φ 3 ;

[0027] n 2 is the number of evenly distributed holes in the evenly distributed hole group with the evenly distributed hole diameter of φ 4 ;

[0028] φ 1 、φ 3 and φ 4 are in the unit of m.

[0029] In the superheat removal component of some embodiments, the air distribution plate further includes a surrounding plate, the surrounding plate is located at the edge of the air distribution plate body and has an included angle with the air distribution plate body, and the surrounding plate is connected to the partition wall.

[0030] In the superheat removal component of some embodiments, the superheat removal component includes a gas baffle, and the gas baffle is located between the inlet of the superheat removal chamber and the air distribution plate.

[0031] In the superheat removal component of some embodiments, the inlet and the outlet of the superheat removal chamber are arranged on opposite sides of the partition wall, the inlet of the superheat removal chamber is located in the middle of the side where it is located, and the outlet of the superheat removal chamber is located at the end of the side where it is located.

[0032] In the superheat removal component of some embodiments, the partition wall has two outlets of the superheat removal chamber located on both sides of the inlet of the superheat removal chamber.

[0033] In the superheat removal component of some embodiments, the diameter φ 1 of the inlet of the superheat removal chamber and the diameter φ 2 of the two outlets of the superheat removal chamber satisfy 0.25φ 2 2 ≤φ 1 2 ≤4φ 2 2 .

[0034] In the superheat removal component of some embodiments, the partition wall includes a first wall, a second wall spaced from the first wall, two third walls respectively located on both sides of the first wall and the second wall and connecting the first wall and the second wall, and two fourth walls respectively connected to both ends of the first wall, the second wall and the third wall. The middle part of the first heat exchange tube is located in the superheat removal cavity, and both ends of the first heat exchange tube are located in the condensation cavity. Tube holes for the first heat exchange tube to pass through are provided on the fourth wall. The superheat removal cavity inlet is arranged on the first wall, and the superheat removal cavity outlet is arranged on the second wall.

[0035] In the superheat removal component of some embodiments, the middle part of the first heat exchange tube is located in the superheat removal cavity, both ends of the first heat exchange tube are located outside the partition wall, and tube holes for the first heat exchange tube to pass through are provided on the fourth wall.

[0036] A second aspect of the present disclosure provides a heat exchanger, including:

[0037] A housing having a gaseous working medium inlet and a liquid working medium outlet;

[0038] The superheat removal component described in the first aspect of the present disclosure, the partition wall of the superheat removal component divides the internal space of the housing into the superheat removal cavity and the condensation cavity. The gaseous working medium inlet is communicated with the superheat removal cavity inlet, and the condensation cavity is communicated with the superheat removal cavity outlet and the liquid working medium outlet; and

[0039] A second heat exchange tube located in the condensation cavity and configured to condense the gaseous working medium entering the condensation cavity from the superheat removal cavity into a liquid working medium.

[0040] In the heat exchanger of some embodiments, a support plate assembly is further included. The support plate assembly includes a support plate. The partition wall is connected to the support plate, and the support plate is connected to the inner wall of the housing.

[0041] In the heat exchanger of some embodiments, the support plate assembly further includes a support rod, and the support rod connects the support plate and a tube plate for supporting the second heat exchange tube.

[0042] In the heat exchanger of some embodiments, the housing is cylindrical, the partition wall is a box body having the superheat removal cavity and extends along the axial direction of the housing, and the first heat exchange tube and the second heat exchange tube extend along the axial direction of the housing.

[0043] In the heat exchanger of some embodiments, the box body is symmetrically arranged with respect to the plane passing through the center line of the gaseous working medium inlet and the axis of the housing, wherein,

[0044] The ratio of the distance in the radial direction of the housing along the cross-section of the box body in the plane to the inner diameter of the housing is 0.1 to 0.35; and / or

[0045] The ratio of the length of the box body to the length of the housing is 0.4 to 1.

[0046] In the heat exchanger of some embodiments, there are intervals between the axial two ends of the partition wall and the axial two ends of the housing respectively. The middle part of the first heat exchange tube is located in the superheat removal cavity, and the two ends of the first heat exchange tube are located in the condensation cavity.

[0047] In the heat exchanger of some embodiments, the ratio of the number of the first heat exchange tubes to the sum of the numbers of the first heat exchange tubes and the second heat exchange tubes is 3 to 20%.

[0048] The third aspect of the present disclosure provides a refrigeration system, including a condenser, and the condenser is the heat exchanger described in the first aspect of the present disclosure.

[0049] Based on the superheat removal component, heat exchanger and refrigeration system provided by the present disclosure, since the gaseous working medium enters the superheat removal cavity first and is cooled by at least a part of the tube section of the first heat exchange tube in the superheat removal cavity before entering the condensation cavity, it is beneficial to make the gaseous working medium fully exchange heat with the tube section of the first heat exchange tube in the superheat removal cavity, which is beneficial to better organize the air flow in the superheat removal cavity, thereby being beneficial to improving the heat transfer coefficient of the superheat removal heat transfer, and thus improving the overall heat transfer efficiency of the heat exchanger. With the increase of α, on the premise that the total heat transfer amount remains unchanged, the smaller the superheat removal heat transfer coefficient of the heat exchanger is. By controlling the parameter α, the number of heat exchange tubes and the size parameters (including outer diameter and length) are kept within the reasonable range of the existing heat exchange design, so that the heat exchanger can adapt to different working conditions.

[0050] Through the following detailed description of the exemplary embodiments of the present disclosure with reference to the accompanying drawings, other features and advantages of the present disclosure will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings described herein are used to provide a further understanding of the present disclosure, and constitute a part of this application. The schematic embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0052] Figure 1 It is a schematic structural diagram of the heat exchanger according to the embodiment of the present disclosure.

[0053] Figure 2 is Figure 1 A schematic structural diagram of the superheat removal component of the heat exchanger shown, in which the top plate of the partition wall is not shown.

[0054] Figure 3 is Figure 2Schematic diagram of the front view structure with a partial section of the superheat removal component shown.

[0055] Figure 4 is Figure 3 Schematic diagram of the sectional view structure of the superheat removal component shown.

[0056] Figure 5 is Figure 2 Schematic diagram of the sectional view structure of the partition wall of the superheat removal component shown in one direction.

[0057] Figure 6 is Figure 5 Schematic diagram of the sectional view structure of the partition wall shown in another direction.

[0058] Figure 7 is Figure 2 Schematic diagram of the structure of the gas equalizing plate of the superheat removal component shown in one direction.

[0059] Figure 8 is Figure 7 Schematic diagram of the structure of the gas equalizing plate shown in another direction.

[0060] Figure 9 is Figure 1 Schematic diagram of the connection structure between the superheat removal component and the support plate component of the heat exchanger shown.

[0061] Figures 1 to 9 In the figure, each reference numeral represents respectively:

[0062] 1, left water chamber;

[0063] 2, left side tube sheet;

[0064] 3, shell, 3A, gaseous working medium inlet, 3B, liquid working medium outlet, 3C, condensation chamber;

[0065] 4, second heat exchange tube;

[0066] 5, superheat removal component, 501, partition wall, 5011, first wall, 5012, second wall, 5013, third wall, 5014, fourth wall, 501A, superheat removal chamber inlet, 501B, superheat removal chamber outlet, 501C, superheat removal chamber; 502, gas equalizing plate, 5021, gas equalizing plate main body, 50211, baffle area, 50212, orifice plate area, 5022, enclosing plate, 503, first heat exchange tube, 504, gas baffle;

[0067] 6, support plate component, 601, support plate, 602, support rod;

[0068] 7, right side tube sheet;

[0069] 8, right flange;

[0070] 9. Right water chamber;

[0071] 10. Right water chamber gasket;

[0072] 11. Liquid collection tank;

[0073] 12. Left water chamber gasket;

[0074] 13. Left flange;

[0075] 14. Lower water chamber connecting pipe;

[0076] 15. Upper water chamber connecting pipe;

[0077] 16. Air inlet pipe. Detailed implementation manners

[0078] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0079] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0080] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meanings and thus cannot be construed as limiting the scope of protection of the present disclosure.

[0081] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present disclosure; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0082] As Figures 1 to 9 shown, an overheat removal component is provided in an embodiment of the present disclosure, including a partition wall 501 and a first heat exchange tube 503. The partition wall 501 encloses an overheat removal cavity 501C, and an overheat removal cavity inlet 501A and an overheat removal cavity outlet 501B communicating with the overheat removal cavity 501C are provided on the partition wall 501. At least a part of the pipe section of the first heat exchange tube 503 is located in the overheat removal cavity 501C to cool the gaseous working medium entering the overheat removal cavity 501C. Among them,

[0083] ;

[0084] α is the product of the logarithmic mean temperature difference and the heat transfer area, and the value range of α is 10 to 100, with the unit of m 2 *K;

[0085] m is the number of the first heat exchange tubes 503;

[0086] D is the outer diameter of the first heat exchange tube 503, with the unit of m;

[0087] L is the length of the pipe section of the first heat exchange tube 503 located in the overheat removal cavity 501C, with the unit of m;

[0088] T in is the temperature of the gaseous working medium entering the overheat removal cavity 501C, with the unit of K;

[0089] T out is the temperature of the gaseous working medium flowing out of the overheat removal cavity 501C, with the unit of K;

[0090] T wall is the average outer surface temperature of the pipe section of the first heat exchange tube 503 located in the overheat removal cavity 501C, with the unit of K.

[0091] Based on the overheating prevention component provided by the embodiments of the present disclosure, since the gaseous working medium enters the overheating prevention cavity before entering the condensation cavity and is cooled by at least a part of the pipe section of the first heat exchange pipe in the overheating prevention cavity, it is beneficial to enable the gaseous working medium to fully exchange heat with the pipe section of the first heat exchange pipe in the overheating prevention cavity, which is conducive to better organizing the air flow in the overheating prevention cavity, thereby facilitating the improvement of the heat transfer coefficient of the overheating prevention heat exchange, and thus improving the overall heat transfer efficiency of the heat exchanger. As α increases, on the premise that the total heat transfer amount remains unchanged, the overheating prevention heat transfer coefficient of the heat exchanger is smaller. By controlling the parameter α, the number of heat exchange pipes and the size parameters (including outer diameter and length) are maintained within the reasonable range of the existing heat exchange design, so that the heat exchanger can adapt to different working conditions.

[0092] In the overheating prevention component of some embodiments, the overheating prevention component 5 includes an air distribution plate 502 having a plurality of air distribution holes. The air distribution plate 502 is located in the overheating prevention cavity 501C and is arranged between the overheating prevention cavity inlet 501A and the overheating prevention cavity outlet 501B. At least a part of the pipe section of the first heat exchange pipe 503 is located between the air distribution plate 502 and the overheating prevention cavity outlet 501B.

[0093] In the overheating prevention component of some embodiments, the air distribution plate 502 includes an air distribution plate main body 5021 facing the overheating prevention cavity inlet 501A. The air distribution plate main body 5021 includes a baffle area 50211 opposite to the overheating prevention cavity inlet 501A and an orifice plate area 50212 connected to the baffle area 50211. The air distribution holes are located on the orifice plate area 50212.

[0094] In the overheating prevention component of some embodiments, among the plurality of air distribution holes, on both sides of the baffle area 50211 of the air distribution plate main body 5021, there are two air distribution hole groups along the direction from the baffle area 50211 to the orifice plate area 50212. The diameter φ of the air distribution holes in the air distribution hole group close to the baffle area 50211 3 is smaller than the diameter φ of the air distribution holes in the air distribution hole group far from the baffle area 50211 4 .

[0095] In the overheating prevention component of some embodiments, the orifice plate area 50212 includes two air distribution hole groups. The diameter φ of the air distribution holes 502A in the air distribution hole group close to the baffle area 50211 3 and the diameter φ of the air distribution holes 502B in the air distribution hole group far from the baffle area 50211 4 satisfy 1.5φ 3 ≤φ 4 ≤5φ 3 .

[0096] In the overheating prevention component of some embodiments, the pressure drop ΔP of the gaseous working medium flowing through the overheating prevention component 5 is:

[0097] ;

[0098] ;

[0099] ρ is the density of the gaseous working medium at the inlet 3A of the gaseous working medium, with the unit of kg / m 3 ;

[0100] v is the flow velocity of the gaseous working medium at the inlet 3A of the gaseous working medium, with the unit of m / s;

[0101] φ 1 is the diameter of the inlet 501A of the superheat removal chamber;

[0102] n 1 is the number of evenly distributed pores of the evenly distributed pore group with the diameter of φ 3 ;

[0103] n 2 is the number of evenly distributed pores of the evenly distributed pore group with the diameter of φ 4 ;

[0104] φ 1 、φ 3 and φ 4 are in the unit of m.

[0105] In the superheat removal component of some embodiments, the air distribution plate 502 further includes a surrounding plate 5022. The surrounding plate 5022 is located at the edge of the air distribution plate main body 5021 and forms an angle with the air distribution plate main body 5021, and the surrounding plate 5022 is connected to the partition wall 501.

[0106] In the superheat removal component of some embodiments, the superheat removal component 5 includes a gas baffle 504, and the gas baffle 504 is located between the inlet 501A of the superheat removal chamber and the air distribution plate 502.

[0107] In the superheat removal component of some embodiments, the inlet 501A of the superheat removal chamber and the outlet 501B of the superheat removal chamber are arranged on opposite sides of the partition wall 501. The inlet 501A of the superheat removal chamber is located in the middle of its corresponding side, and the outlet 501B of the superheat removal chamber is located at the end of its corresponding side.

[0108] In the superheat removal component of some embodiments, the partition wall 501 has two outlets 501B of the superheat removal chamber on both sides of the inlet 501A of the superheat removal chamber.

[0109] In the superheat removal component of some embodiments, the diameter φ 1 of the inlet 501A of the superheat removal chamber and the diameter φ 2 of the two outlets 501B of the superheat removal chamber satisfy 0.25φ 2 2 ≤φ 1 2 ≤4φ 2 2 .

[0110] In the superheat removal component of some embodiments, the partition wall 501 includes a first wall 5011, a second wall 5012 spaced from the first wall 5011, two third walls 5013 respectively located on both sides of the first wall 5011 and the second wall 5012 and connecting the first wall 5011 and the second wall 5012, and two fourth walls 5014 respectively connected to the two ends of the first wall 5011, the second wall 5012 and the third walls 5013. The middle part of the first heat exchange tube 503 is located in the superheat removal cavity 501C, the two ends of the first heat exchange tube 503 are located in the condensation cavity 3C, the fourth wall 5014 is provided with a tube hole for the first heat exchange tube 503 to pass through, the superheat removal cavity inlet 501A is arranged on the first wall 5011, and the superheat removal cavity outlet 501B is arranged on the second wall 5012.

[0111] In the superheat removal component of some embodiments, the middle part of the first heat exchange tube 503 is located in the superheat removal cavity 501C, the two ends of the first heat exchange tube 503 are located outside the partition wall 501, and the fourth wall 5014 is provided with a tube hole for the first heat exchange tube 503 to pass through.

[0112] An embodiment of the present disclosure further provides a heat exchanger, which includes a housing 3, the superheat removal component 5 of the embodiment of the present disclosure, and a second heat exchange tube 4. The housing 3 has a gaseous working medium inlet 3A and a liquid working medium outlet 3B. The partition wall 501 of the superheat removal component 5 divides the internal space of the housing 3 into a superheat removal cavity 501C and a condensation cavity 3C. The gaseous working medium inlet 3A is communicated with the superheat removal cavity inlet 501A, and the condensation cavity 3C is communicated with the superheat removal cavity outlet 501B and the liquid working medium outlet 3B. The second heat exchange tube 4 is located in the condensation cavity 3C and is configured to condense the gaseous working medium entering the condensation cavity 3C from the superheat removal cavity 501C into a liquid working medium.

[0113] In the heat exchanger of some embodiments, it further includes a support plate assembly 6. The support plate assembly includes a support plate 601. The partition wall 501 is connected to the support plate 601, and the support plate 601 is connected to the inner wall of the housing 3.

[0114] In the heat exchanger of some embodiments, the support plate assembly 6 further includes a support rod 602. The support rod 602 connects the support plate 601 and a tube sheet 7 for supporting the second heat exchange tube 4.

[0115] In the heat exchanger of some embodiments, the housing 3 is cylindrical, the partition wall 501 is a box body with a superheat removal cavity 501C and extends along the axial direction of the housing 3, and the first heat exchange tube 503 and the second heat exchange tube 4 extend along the axial direction of the housing.

[0116] In the heat exchanger according to some embodiments, the cartridge is symmetrically arranged with respect to the plane of the center line passing through the gaseous working medium inlet 3A and the axis of the housing 3. The ratio of the distance in the radial direction of the housing 3 of the cross-section of the cartridge in the plane to the inner diameter of the housing 3 is 0.1 to 0.35; and / or the ratio of the length of the cartridge to the length of the housing 3 is 0.4 to 1.

[0117] In the heat exchanger according to some embodiments, there are gaps between the axial ends of the partition wall 501 and the axial ends of the housing 3 respectively. The middle part of the first heat exchange tube 503 is located in the superheat removal chamber 501C, and both ends of the first heat exchange tube 503 are located in the condensation chamber 3C.

[0118] In the heat exchanger according to some embodiments, the ratio of the number of the first heat exchange tubes 503 to the sum of the numbers of the first heat exchange tubes 503 and the second heat exchange tubes 4 is 3 to 20%.

[0119] The embodiment of the present disclosure also provides a refrigeration system, including a condenser, and the condenser is the heat exchanger according to the embodiment of the present disclosure.

[0120] The heat exchanger and the refrigeration system according to the embodiment of the present disclosure have the advantages of the superheat removal assembly according to the embodiment of the present disclosure.

[0121] The following combines Figures 1 to 9 to describe the embodiments of the present disclosure in detail.

[0122] The embodiment of the present disclosure provides a heat exchanger. The heat exchanger includes a housing 3, a superheat removal assembly 5, and a second heat exchange tube 4.

[0123] The housing 3 has a gaseous working medium inlet 3A and a liquid working medium outlet 3B.

[0124] The superheat removal assembly 5 is located inside the housing 3 and includes a partition wall 501 and a first heat exchange tube 503. The partition wall 501 divides the internal space of the housing 3 into a superheat removal chamber 501C and a condensation chamber 3C. The gaseous working medium inlet 3A is communicated with the superheat removal chamber 501C, the liquid working medium outlet 3B is communicated with the condensation chamber 3C, and a superheat removal chamber outlet 501B communicating the superheat removal chamber 501C with the condensation chamber 3C is provided on the partition wall 501. The first heat exchange tube 503 is configured to cool the gaseous working medium entering the internal space through the gaseous working medium inlet 3A. At least part of the tube section of the first heat exchange tube 503 is located in the superheat removal chamber 501C to cool the gaseous working medium in the superheat removal chamber 501C.

[0125] The second heat exchange tube 4 is located in the condensation chamber 3C and is configured to condense the gaseous working medium entering the condensation chamber 3C from the superheat removal chamber 501C into a liquid working medium.

[0126] As Figure 1As shown, the heat exchanger of the embodiments of the present disclosure is a horizontal condenser, which is used as the condenser of a refrigeration system. In this embodiment, the gaseous working medium is refrigerant gas, and the liquid working medium is liquid refrigerant.

[0127] As Figure 1 shown, the horizontal condenser includes a left water chamber 1, a left side tube sheet 2, a shell 3, heat exchange tubes 4, a superheat removal component 5, a support plate component 6, a right side tube sheet 7, a right flange 8, a right water chamber 9, a right water chamber gasket 10, a liquid collection package 11, a left water chamber gasket 12, a left flange 13, a lower water chamber connecting pipe 14, an upper water chamber connecting pipe 15, and an intake pipe 16. The intake pipe 16 is connected to the gaseous working medium inlet 3A, and the liquid collection package 11 is connected to the liquid working medium outlet 3B.

[0128] The left water chamber component composed of the left water chamber 1, the left water chamber gasket 12, the left flange 13, the lower water chamber connecting pipe 14, and the upper water chamber connecting pipe 15 is located on the left side of the shell 3 and is sequentially connected to the left end of the shell 3 through the left side tube sheet 2, the left water chamber gasket 12, and the left flange 13, while the right water chamber 9 is sequentially connected to the right end of the shell 3 through the right side tube sheet 7, the right water chamber gasket 10, the right flange 8. The superheat removal component 5 is positioned on the shell 3 by the support plate component 6 positioned in the middle. The first heat exchange tube 503 and the second heat exchange tube 4 pass through the inside of the shell 3 and communicate with the left water chamber 1 and the right water chamber 9.

[0129] As Figures 1 to 6 、 Figure 9 shown, the superheat removal chamber 501C is surrounded by the partition wall 501. In an embodiment not shown, the superheat removal chamber 501C is jointly surrounded by the partition wall 501 and the shell 3.

[0130] As Figures 1 to 6 、 Figure 9 shown, the partition wall 501 is a box body with a superheat removal chamber 501C and has a superheat removal chamber inlet 501A. The heat exchanger includes an intake pipe 16, and the intake pipe 16 passes through the gaseous working medium inlet 3A and is connected to the superheat removal chamber inlet 501A.

[0131] As Figures 1 to 6 、 Figure 9 shown, the partition wall 501 includes a first wall 5011, a second wall 5012 spaced from the first wall 5011, two third walls 5013 respectively located on both sides of the first wall 5011 and the second wall 5012 and connecting the first wall 5011 and the second wall 5012, and two fourth walls 5014 respectively connected to the two ends of the first wall 5011, the second wall 5012, and the third walls 5013. The middle part of the first heat exchange tube 503 is located in the superheat removal chamber 501C, and both ends of the first heat exchange tube 503 are located in the condensation chamber 3C. The fourth wall 5014 is provided with a tube hole for the first heat exchange tube 503 to pass through. The superheat removal chamber inlet 501A is arranged on the first wall 5011, and the superheat removal chamber outlet 501B is arranged on the second wall 5012.

[0132] As Figures 1 to 6 , Figure 9 shown, the overheat removal chamber inlet 501A is located in the middle of the side of the box body opposite to the gaseous working medium inlet 3A, and the overheat removal chamber outlet 501B is located at the end of the side of the box body far from the gaseous working medium inlet 3A.

[0133] As Figures 1 to 9 shown, the partition wall 501 has two overheat removal chamber outlets 501B that are symmetric with respect to the overheat removal chamber inlet 501A.

[0134] As Figure 5 shown, the diameter φ1 of the overheat removal chamber inlet 501A and the diameter φ of the two overheat removal chamber outlets 501B 2 satisfy 0.25φ 2 2 ≤φ 1 2 ≤4φ 2 2 .

[0135] As Figure 9 shown, the heat exchanger further includes a support plate assembly 6. The support plate assembly 6 includes a support plate 601. The partition wall 501 is connected to the support plate 601, and the support plate 601 is connected to the inner wall of the housing 3.

[0136] As Figure 9 shown, the support plate assembly 6 further includes a support rod 602. The support rod 602 connects the support plate 601 and the tube sheet (left side tube sheet 2 and / or right side tube sheet 7) for supporting the second heat exchange tube 4. In this embodiment, both ends of the first heat exchange tube 503 and both ends of the second heat exchange tube 4 are respectively supported on the left side tube sheet 2 and / or the right side tube sheet 7.

[0137] The overheat removal assembly 5 and the support plate assembly 6 can be connected as a whole before being assembled with the housing 3 for overall installation and positioning.

[0138] As Figures 1 to 3 , Figure 9 shown, the housing 3 of the heat exchanger is cylindrical. The partition wall 501 is a box body having an overheat removal chamber 501C and extends along the axial direction of the housing 3. The first heat exchange tube 503 and the second heat exchange tube 4 extend along the axial direction of the housing 3.

[0139] The box body is symmetrically arranged with respect to the plane passing through the center line of the gaseous working medium inlet 3A and the axis of the housing 3. Among them, the ratio of the distance in the radial direction of the housing 3 of the cross-section of the box body in the plane to the inner diameter of the housing 3 is 0.1 - 0.35, for example, 0.2; and / or the ratio of the length of the box body to the length of the housing 3 is 0.4 - 1, for example, 0.6, 0.8, etc.

[0140] Reasonably setting the relative sizes of the box body and the housing 3 is conducive to the reasonable division of the heat exchange space between superheat removal heat exchange and condensation heat exchange, facilitating the full realization of superheat removal of the gaseous working medium by the first heat exchange tube 503 and preventing the gaseous refrigerant from being overly cooled in the superheat removal chamber 501C to form a liquid working medium.

[0141] Axial ends of the partition wall 501 and axial ends of the housing 3 respectively have intervals. The middle part of the first heat exchange tube 503 is located in the superheat removal chamber 501C, and both ends of the first heat exchange tube 503 are located in the condensation chamber 3C.

[0142] The ratio of the number of the first heat exchange tubes 503 to the sum of the numbers of the first heat exchange tubes 503 and the second heat exchange tubes 4 is 3 - 20%. Reasonably setting this ratio is conducive to the full realization of superheat removal of the gaseous working medium by the first heat exchange tube 503 and preventing the gaseous refrigerant from being overly cooled in the superheat removal chamber 501C to form a liquid working medium.

[0143] After the heat exchanger is positioned and installed, the axis of the housing 3 is horizontal.

[0144] As Figures 1 to 4 、 Figures 6 to 9 shown, the superheat removal assembly 5 includes an air distribution plate 502 having a plurality of uniform air holes. The air distribution plate 502 is located in the superheat removal chamber 501C and is arranged between the gaseous working medium inlet 3A and the superheat removal chamber outlet 501B. At least a part of the pipe section of the first heat exchange tube 503 is located between the air distribution plate 502 and the superheat removal chamber outlet 501B. The air distribution plate 502 enables the gaseous working medium to flow through the pipe section of the first heat exchange tube 503 in the superheat removal chamber 501C approximately perpendicular to the axial direction of the first heat exchange tube 503 and uniformly. Therefore, it is conducive to improving the heat exchange efficiency between the gaseous working medium and the pipe section of the first heat exchange tube 503 in the superheat removal chamber 501C, thereby improving the overall heat exchange efficiency of the heat exchanger.

[0145] As Figures 1 to 4 、 Figures 6 to 9 shown, the air distribution plate 502 includes an air distribution plate main body 5021 facing the inlet direction of the gaseous working medium entering the superheat removal chamber 501C. The air distribution plate main body 5021 includes a baffle area 50211 opposite to the inlet direction and an orifice plate area 50212 connected to the baffle area 50211. The uniform air holes are located on the orifice plate area 50212. Setting the baffle area 50211 is conducive to preventing the gaseous working medium airflow from directly hitting the first heat exchange tube 503.

[0146] As Figures 1 to 4 、 Figures 6 to 9 shown, among the multiple uniform air holes, they are divided into multiple uniform air hole groups along the direction from the baffle area 50211 to the orifice plate area 50212. The diameters of the uniform air holes in the uniform air hole group close to the baffle area 50211 are smaller than those of the uniform air holes in the uniform air hole group far from the baffle area 50211.

[0147] AsFigures 1 to 4 , Figures 6 to 9 As shown, the orifice plate area 50212 includes two groups of equalizing orifices. The diameter φ of the equalizing orifices 502A in the group of equalizing orifices closer to the baffle area 50211 3 and the diameter φ of the equalizing orifices 502B in the group of equalizing orifices farther from the baffle area 50211 4 satisfy 1.5φ 3 ≤ φ 4 ≤ 5φ 3 .

[0148] Reasonably setting the diameter of the equalizing orifices is conducive to the uniform flow of the gaseous working medium past the pipe section of the first heat exchange tube 503 in the superheat removal chamber 501C, thereby facilitating the uniform heat exchange between the gaseous working medium and each part of the pipe section of the first heat exchange tube 503 in the superheat removal chamber 501C, and being conducive to improving the overall heat efficiency of the heat exchanger.

[0149] For example, Figures 1 to 9 in the embodiment shown, the partition wall 501 is a box body including the superheat removal chamber 501C and has a superheat removal chamber inlet 501A communicating with the gaseous working medium inlet 3A. The diameter of the superheat removal chamber inlet 501A is φ 1 .

[0150] The pressure drop ΔP of the gaseous working medium flowing through the superheat removal component 5 is:

[0151] ;

[0152] .

[0153] ρ is the density of the gaseous working medium at the gaseous working medium inlet 3A, with the unit of kg / m 3 ; v is the flow velocity of the gaseous working medium at the gaseous working medium inlet 3A, with the unit of m / s; n 1 is the number of equalizing orifices in the group of equalizing orifices with the equalizing orifice diameter of φ 3 , n 2 is the number of equalizing orifices in the group of equalizing orifices with the equalizing orifice diameter of φ 4 ; φ 1 , φ 3 and φ 4 are in the unit of m.

[0154] By reasonably controlling the orifice parameters on the equalizing plate to change the value of C, the purpose of controlling the pressure drop of the heat exchanger is achieved, so that the pressure drop of the heat exchanger in this patent is controlled within a reasonable range. The pressure drop ΔP is proportional to C, and decreases with the increase of φ 1 and increases with the increase of φ 3 and φ 4 . Thus, the diameter of the superheat removal chamber inlet 501A can be reasonably designed as φ 1The average pore diameter of each group controls the pressure drop ΔP of the gaseous working medium flowing through the superheat removal component 5 within a reasonable range.

[0155] As Figures 1 to 4 , Figures 6 to 9 shown, the gas distribution plate 502 further includes a surrounding plate 5022. The surrounding plate 5022 is located at the edge of the gas distribution plate main body 5021 and has an included angle with the gas distribution plate main body 5021. The surrounding plate 5022 is connected to the outer shell 3 or the partition wall 501.

[0156] As Figures 1 to 4 , Figures 6 to 9 shown, the superheat removal component 5 includes a gas baffle 504. The gas baffle 504 is located on the side facing the oncoming flow of the gaseous working medium in the baffle area 50211.

[0157] The gas baffle 504 can block between the gas distribution plate 502 and the oncoming flow side of the gaseous working medium to prevent the airflow from directly hitting the gas distribution plate 502.

[0158] As Figures 1 to 9 shown in the embodiment,

[0159] .

[0160] Among them, α is the product of the logarithmic mean temperature difference and the heat transfer area. The value range of α is 10 - 100, and the unit is m 2 *K; m is the number of the first heat exchange tubes 503; D is the outer diameter of the first heat exchange tubes 503, and the unit is m; L is the length of the tube section of the first heat exchange tubes 503 located in the superheat removal chamber 501C, and the unit is m; T in is the temperature of the gaseous working medium entering the superheat removal chamber 501C, and the unit is K; T out is the temperature of the gaseous working medium flowing out of the superheat removal chamber 501C, and the unit is K; T wall is the average outer surface temperature of the tube section of the first heat exchange tubes 503 located in the superheat removal chamber 501C, and the unit is K.

[0161] As α increases, on the premise that the total heat transfer amount remains unchanged, the superheat removal heat transfer coefficient of the heat exchanger is smaller. By controlling the parameter α, the number of heat exchange tubes and the size parameters (including the outer diameter and length) are maintained within the reasonable range of the existing heat exchange design, so that the heat exchanger can adapt to different working conditions.

[0162] In the horizontal condenser according to the embodiments of the present disclosure, the superheat removal component 5 is located in the upper part of the internal space of the housing 3 of the heat exchanger. The cross-section of the partition wall 501 perpendicular to the housing 3 presents a trapezoid with a smaller upper part and a larger lower part. The superheated refrigerant gas enters the superheat removal cavity 501C in the box body (partition wall 501) of the superheat removal component 5 through the inlet pipe 16, exchanges heat with the pipe section of the first heat exchange pipe 503 therein, is cooled to the saturated state, and then flows out from the second wall 5012 at the bottom of the box body through the two superheat removal cavity outlets 501B at both axial ends of the housing 3 and enters the condensation zone 3C of the heat exchanger for phase change.

[0163] Compared with the horizontal condenser in the related art, the embodiments of the present disclosure add an internal superheat removal component 5 for enhancing single-phase sensible heat exchange. The superheated refrigerant gas enters the box body serving as the partition wall 501 of the superheat removal component 5 through the inlet pipe 16. The refrigerant gas collides with the gas baffle 504 on its lower side and is diverted to the orifice plate areas 50212 along both axial sides of the housing on the gas equalizing plate 502. The diverted refrigerant gas enters the superheat removal cavity 501C after passing through the multiple gas equalizing holes 502A and 502B on the orifice plate area 50212, exchanges heat with the pipe section of the first heat exchange pipe 503 located in the superheat removal cavity 501C, and the heat of the refrigerant gas is taken away by the cooling medium, such as cooling water, in the first heat exchange pipe 503 and is cooled. The cooled refrigerant gas is in a saturated state or close to a saturated state and flows from the superheat removal cavity outlet 501B on the second wall 5012 of the box body to the condensation zone 3C to exchange heat with the second heat exchange pipe 4 and the pipe section of the first heat exchange pipe 503 located in the condensation zone 3C.

[0164] The partition wall 501, such as a box body, separates the superheat removal heat exchange process and the condensation heat exchange process of the condenser, providing a controllable space for separately enhancing the superheat removal heat exchange. Secondly, the gas baffle 504 located below the outlet of the inlet pipe 16 of the superheat removal component 5 reduces the vibration impact of the relatively high-speed airflow on the first heat exchange pipe 503, improving the structural safety of the superheat removal component 5 and the heat exchanger. At the same time, the gas equalizing plate 502 and the gas equalizing holes opened thereon deflect the airflow from the direction parallel to the first heat exchange pipe 503 to the direction perpendicular to the first heat exchange pipe 503, which is beneficial to increasing the flow velocity across the tube bundle, and reducing the included angle between the refrigerant airflow and the heat transfer direction of the first heat exchange pipe 503, that is, strengthening the field synergy effect of single-phase sensible heat exchange and improving the superheat removal heat exchange intensity.

[0165] Therefore, this structural improvement can further improve the energy efficiency of the corresponding horizontal condenser. At the same time, because it can significantly enhance the superheat removal heat exchange process, the heat exchange area for the superheat removal heat exchange process can be correspondingly reduced, that is, the number of heat exchange pipes can be reduced, thereby achieving the purpose of cost reduction and miniaturization of the heat exchanger.

[0166] An embodiment of the present disclosure further provides a refrigeration system, including a condenser. The condenser is the heat exchanger of the embodiment of the present disclosure. The refrigeration system of the embodiment of the present disclosure has the same advantages as the heat exchanger of the embodiment of the present disclosure.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present disclosure or perform equivalent replacements on some technical features, and they should all be covered within the scope of the technical solutions claimed by the present disclosure.

Claims

1. A superheat removal component, characterized in that, it includes: A partition wall (501), the partition wall (501) is a box body enclosing a superheat removal cavity (501C), and a superheat removal cavity inlet (501A) and a superheat removal cavity outlet (501B) communicating with the superheat removal cavity (501C) are provided on the partition wall (501); and A first heat exchange tube (503), at least part of the tube section of the first heat exchange tube (503) is located in the superheat removal cavity (501C) to cool the gaseous working medium entering the superheat removal cavity (501C); wherein, ； α is the product of the logarithmic mean temperature difference and the heat transfer area, and the value range of α is 10 to 100, with the unit of m 2 *K; m is the number of the first heat exchange tubes (503); D is the outer diameter of the first heat exchange tube (503), with the unit of m; L is the length of the tube section of the first heat exchange tube (503) located in the superheat removal cavity (501C), with the unit of m; T in is the temperature of the gaseous working medium entering the said superheat chamber (501C), with the unit of K; T out is the temperature of the gaseous working medium flowing out of the superheating chamber (501C), in K; T wall is the average outer surface temperature of the pipe section of the first heat exchange pipe (503) located in the de-superheating chamber (501C), with the unit of K; wherein, the superheat removal component (5) includes a gas distribution plate (502) having a plurality of gas equalizing holes, the gas distribution plate (502) is located in the superheat removal cavity (501C) and is arranged between the superheat removal cavity inlet (501A) and the superheat removal cavity outlet (501B), and at least part of the tube section of the first heat exchange tube (503) is located between the gas distribution plate (502) and the superheat removal cavity outlet (501B).

2. The superheat removal component according to claim 1, characterized in that, the gas distribution plate (502) includes a gas distribution plate main body (5021) facing the superheat removal cavity inlet (501A), the gas distribution plate main body (5021) includes a baffle area (50211) opposite to the superheat removal cavity inlet (501A) and an orifice plate area (50212) connected to the baffle area (50211), and the gas equalizing holes are located on the orifice plate area (50212).

3. The superheat removal component according to claim 2, characterized in that, Among the plurality of air equalizing holes, on both sides of the baffle plate area (50211) of the air equalizing plate body (5021), there are two air equalizing hole groups along the direction from the baffle plate area (50211) to the orifice plate area (50212), wherein the diameter φ of the air equalizing holes in the air equalizing hole group close to the baffle plate area (50211) 3 is smaller than the diameter φ of the air equalizing holes in the air equalizing hole group far from the baffle plate area (50211) 4 .

4. The superheat removal component according to claim 3, characterized in that, The orifice plate area (50212) includes two of the air equalizing orifice groups, and the diameter φ of the air equalizing orifices (502A) of the air equalizing orifice group close to the baffle area (50211) 3 and the diameter φ of the air equalizing orifices (502B) of the air equalizing orifice group far from the baffle area (50211) 4 satisfy 1.5φ 3 ≤φ 4 ≤5φ 3 .

5. The superheat removal component according to claim 3, characterized in that, The pressure drop ΔP of the gaseous working medium flowing through the superheat removal component (5) is: ； ； ρ is the density of the gaseous working medium at the gaseous working medium inlet (3A), with the unit of kg / m 3 ; v is the flow velocity of the gaseous working medium at the gaseous working medium inlet (3A), with the unit of m / s; φ 1 is the diameter of the inlet (501A) of the said superheating chamber; n 1 is the number of uniform pores in the uniform pore group with a uniform pore diameter of φ 3 ; n 2 is the number of uniform pores in the uniform pore group with a uniform pore diameter of φ 4 ; φ 1 、 φ 3 and φ 4 are in the unit of m.

6. The superheat removal component according to claim 1, characterized in that, the gas distribution plate (502) includes a gas distribution plate main body (5021) facing the superheat removal cavity inlet (501A), the gas distribution plate (502) further includes a surrounding plate (5022), the surrounding plate (5022) is located at the edge of the gas distribution plate main body (5021) and has an included angle with the gas distribution plate main body (5021), and the surrounding plate (5022) is connected to the partition wall (501).

7. The superheat removal component according to any one of claims 1 to 6, characterized in that, the superheat removal component (5) includes a gas baffle plate (504), and the gas baffle plate (504) is located between the superheat removal cavity inlet (501A) and the gas distribution plate (502).

8. The superheat removal component according to any one of claims 1 to 6, characterized in that, The inlet (501A) of the superheat removal chamber and the outlet (501B) of the superheat removal chamber are arranged on opposite sides of the partition wall (501). The inlet (501A) of the superheat removal chamber is located in the middle of the side where it is located, and the outlet (501B) of the superheat removal chamber is located at the end of the side where it is located.

9. The superheat removal assembly according to claim 8, wherein, the partition wall (501) has two outlets (501B) of the superheat removal chamber on both sides of the inlet (501A) of the superheat removal chamber.

10. The superheat removal assembly according to claim 9, wherein, The diameter φ of the inlet of the overheating chamber (501A) 1 and the diameter φ of the two outlets of the overheating chamber (501B) 2 satisfy 0.25φ 2 2 ≤ φ 1 2 ≤ 4φ 2 2 .

11. The superheat removal assembly according to claim 8, wherein, the partition wall (501) includes a first wall (5011), a second wall (5012) arranged at an interval from the first wall (5011), two third walls (5013) respectively located on both sides of the first wall (5011) and the second wall (5012) and connecting the first wall (5011) and the second wall (5012), and two fourth walls (5014) respectively connected to both ends of the first wall (5011), the second wall (5012) and the third wall (5013). The middle part of the first heat exchange tube (503) is located in the superheat removal chamber (501C), and both ends of the first heat exchange tube (503) are configured to be located in the condensation chamber (3C) of the heat exchanger where the superheat removal assembly is located. Tube holes for the first heat exchange tube (503) to pass through are provided on the fourth wall (5014). The inlet (501A) of the superheat removal chamber is arranged on the first wall (5011), and the outlet (501B) of the superheat removal chamber is arranged on the second wall (5012).

12. The superheat removal assembly according to claim 11, wherein, the middle part of the first heat exchange tube (503) is located in the superheat removal chamber (501C), both ends of the first heat exchange tube (503) are located outside the partition wall (501), and tube holes for the first heat exchange tube (503) to pass through are provided on the fourth wall (5014).

13. A heat exchanger, wherein, comprising: a housing (3) having a gaseous working medium inlet (3A) and a liquid working medium outlet (3B); the superheat removal assembly (5) according to any one of claims 1 to 12, the partition wall (501) of the superheat removal assembly (5) divides the internal space of the housing (3) into the superheat removal chamber (501C) and the condensation chamber (3C). The gaseous working medium inlet (3A) is communicated with the inlet (501A) of the superheat removal chamber, and the condensation chamber (3C) is communicated with the outlet (501B) of the superheat removal chamber and the liquid working medium outlet (3B); and a second heat exchange tube (4) located in the condensation chamber (3C) and configured to condense the gaseous working medium entering the condensation chamber (3C) from the superheat removal chamber (501C) into a liquid working medium.

14. The heat exchanger according to claim 13, wherein, It further includes a support plate assembly (6), the support plate assembly includes a support plate (601), the partition wall (501) is connected to the support plate (601), and the support plate (601) is connected to the inner wall of the housing (3).

15. The heat exchanger according to claim 14, wherein, the support plate assembly (6) further includes a support rod (602), and the support rod (602) connects the support plate (601) and a tube sheet (7) for supporting the second heat exchange tube (4).

16. The heat exchanger according to claim 13, wherein, the housing (3) is cylindrical, the partition wall (501) is a box body having the superheat removal chamber (501C) and extends along the axial direction of the housing (3), and the first heat exchange tube (503) and the second heat exchange tube (4) extend along the axial direction of the housing.

17. The heat exchanger according to claim 16, wherein, the box body is symmetrically arranged with respect to the plane passing through the center line of the gaseous working medium inlet (3A) and the axis of the housing (3), wherein, the ratio of the distance in the radial direction of the housing (3) of the cross section of the box body in the plane to the inner diameter of the housing (3) is 0.1 to 0.35; and / or the ratio of the length of the box body to the length of the housing (3) is 0.4 to 1.

18. The heat exchanger according to claim 16, wherein, axial ends of the partition wall (501) and axial ends of the housing (3) respectively have intervals, the middle part of the first heat exchange tube (503) is located in the superheat removal chamber (501C), and both ends of the first heat exchange tube (503) are located in the condensation chamber (3C).

19. The heat exchanger according to any one of claims 13 to 18, wherein, the ratio of the number of the first heat exchange tubes (503) to the sum of the numbers of the first heat exchange tubes (503) and the second heat exchange tubes (4) is 3 to 20%.

20. A refrigeration system includes a condenser, wherein, the condenser is the heat exchanger according to any one of claims 1 to 19.

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