Refrigerant circulating unit and air conditioning system

Abstract

The utility model discloses a refrigerant circulating unit and an air conditioning system, the refrigerant circulating unit comprises a first shell and tube heat exchanger (1), the first shell and tube heat exchanger (1) comprises a first barrel (11) extending along a first direction (A), a first heat exchange tube arranged in the first barrel (11) and used for circulating a heat exchange medium, and a first tube plate (12) perpendicular to the first direction (A) and used for supporting the first heat exchange tube; the second shell and tube heat exchanger (2) comprises a second barrel (21) which extends along the first direction (A) and is arranged side by side with the first barrel (11) along a second direction (B) perpendicular to the first direction (A), a second heat exchange tube which is arranged in the second barrel (21) and is used for circulating a heat exchange medium, and a second tube plate (22) which is perpendicular to the first direction (A) and is used for supporting the second heat exchange tube; the first tube plate (12) and the second tube plate (22) are located at the same end in the first direction (A) and connected into a whole.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a refrigerant circulation unit and an air conditioning system. Background Art

[0002] At present, more and more scenarios or regions have higher requirements on the earthquake resistance of air-conditioning equipment. Conventional air-conditioning equipment has long been unable to withstand more severe earthquake damage.

[0003] Conventional water-cooled screw units are usually supported by large tube sheets at both ends of the shell and tube, which also have a sealing function. The tube sheet support structure of conventional water-cooled screw units has low rigidity. Under the impact of seismic waves, the tube sheet support reliability and sealing reliability are insufficient. In some areas, earthquakes are of high intensity, and refrigerant circulation units are generally installed on the roof of factory buildings. The seismic effect of the floors is amplified. The support structure of existing air-conditioning equipment is not sufficient to ensure the overall rigidity of the equipment. There is also the problem of large seismic displacement due to low equipment rigidity, and there is also the risk of relative deformation and pulling of various components, which has attracted much attention. Utility Model Content

[0004] The utility model aims to provide a refrigerant circulation unit and an air conditioning system with improved earthquake resistance.

[0005] According to one aspect of the embodiment of the utility model, the utility model provides a refrigerant circulation unit, the refrigerant circulation unit comprising:

[0006] The first shell and tube heat exchanger comprises a first cylinder extending in a first direction, a first heat exchange tube for circulating a heat exchange medium arranged in the first cylinder, and a first tube sheet perpendicular to the first direction and supporting the first heat exchange tube; and

[0007] The second shell and tube heat exchanger includes a second cylinder extending in a first direction and arranged side by side with the first cylinder in a second direction perpendicular to the first direction, a second heat exchange tube for circulating heat exchange medium arranged in the second cylinder, and a second tube sheet perpendicular to the first direction and supporting the second heat exchange tube, wherein the first tube sheet and the second tube sheet are located at the same end in the first direction and are connected to form a whole.

[0008] In some embodiments,

[0009] The first tube sheet is disposed at both ends of the first cylinder along the first direction, and the second tube sheet is disposed at both ends of the second cylinder along the first direction, and the first tube sheet and the second tube sheet at the same end in the first direction are connected into a whole; or

[0010] The first shell and tube heat exchanger includes at least two first tube sheets arranged along a first direction, and the second shell and tube heat exchanger includes at least two second tube sheets arranged one-to-one corresponding to the first tube sheets, and the second tube sheets are flush with the corresponding first tube sheets in the first direction and connected together.

[0011] In some embodiments, the first tube sheet has a first protrusion protruding toward the second cylinder relative to the first cylinder, the second tube sheet has a second protrusion protruding toward the first cylinder relative to the second cylinder, and the second protrusion is connected to the first protrusion.

[0012] In some embodiments, the first protrusion and the second protrusion are welded.

[0013] In some embodiments, the tube-to-sheet weld connecting the first protrusion and the second protrusion is perpendicular to the first direction and perpendicular to the second direction.

[0014] In some embodiments,

[0015] The thickness of the first tube sheet is greater than 5 times the thickness of the first cylinder, and the thickness direction of the first tube sheet is parallel to the first direction; and / or

[0016] The length of the first tube sheet is greater than the diameter of the first cylinder, and the length direction of the first tube sheet is parallel to the second direction; and / or

[0017] The width of the first tube sheet is greater than the diameter of the first cylinder, and the width direction of the first tube sheet is perpendicular to the first direction and the second direction; and / or

[0018] The thickness of the second tube sheet is greater than 5 times the thickness of the second cylinder, and the thickness direction of the second tube sheet is parallel to the first direction; and / or

[0019] The length of the second tube sheet is greater than the diameter of the second cylinder, and the length direction of the second tube sheet is parallel to the second direction; and / or

[0020] The width of the second tube sheet is greater than the diameter of the second cylinder, and the width direction of the second tube sheet is perpendicular to the first direction and the second direction.

[0021] In some embodiments, the refrigerant circulation unit also includes a base supporting the first shell and tube heat exchanger and the second shell and tube heat exchanger, the base including a first base supporting the first shell and tube heat exchanger and connected to the first shell and tube heat exchanger and a second base supporting the second shell and tube heat exchanger and connected to the second shell and tube heat exchanger, the first base and the second base are arranged side by side along the second direction and connected together.

[0022] In some embodiments,

[0023] The first base is provided with a first groove, and the shape of the cross section of the first groove perpendicular to the first direction is adapted to the cross section of the first cylinder perpendicular to the first direction at least close to the first base, so that at least the part of the first cylinder close to the first base is embedded in the first groove and connected to the bottom of the first groove; or

[0024] A second groove is provided on the second base, and the shape of the cross section of the second groove perpendicular to the first direction is adapted to the cross section of the second cylinder perpendicular to the first direction, at least the portion close to the second base, so that at least the portion of the second cylinder close to the second base is embedded in the second groove and connected to the bottom of the second groove.

[0025] In some embodiments,

[0026] The first base comprises a first bottom plate and a first web plate erected on the first bottom plate, and a first groove is formed at one end of the first web plate away from the first bottom plate; or

[0027] The second base includes a second bottom plate and a second web plate vertically arranged on the second bottom plate, and a second groove is formed at one end of the second web plate away from the second bottom plate.

[0028] In some embodiments,

[0029] The first base further includes a first rib connecting the first bottom plate and the first web; or

[0030] The second base also includes a second rib plate connecting the second bottom plate and the second web plate.

[0031] In some embodiments,

[0032] The cross section of the first groove perpendicular to the first direction is a first arc shape, and the arc length of the first arc shape is 30%-50% of the circumference of the first cylinder; and / or

[0033] The cross section of the second groove perpendicular to the first direction is a second arc shape, and the arc length of the second arc shape is 30%-50% of the circumference of the second cylinder; and / or

[0034] The width of the first bottom plate is the first width, the width direction of the first bottom plate is parallel to the first direction, the radius of the first cylinder is the first radius, wherein the first width ≥ the first radius * 90%; and / or

[0035] The width of the second bottom plate is the second width, the width direction of the second bottom plate is parallel to the first direction, the radius of the second cylinder is the second radius, wherein the second width ≥ the second radius * 90%; and / or

[0036] The distance that the first web protrudes from one end of the first groove in the second direction in the second direction is the first length, and the radius of the first cylinder is the first radius, wherein the first radius*70%≥the first length≥the first radius*55%; and / or

[0037] The distance that the second web protrudes in the second direction from one end of the second groove along the second direction is the second length, and the radius of the second cylinder is the second radius, wherein second radius*70%≥second length≥second radius*55%.

[0038] In some embodiments, the refrigerant circulation unit includes at least two bases arranged along a first direction.

[0039] In some embodiments, the refrigerant circulation unit further includes an electric control cabinet, which includes:

[0040] The main body of the electric control cabinet; and

[0041] The electric control cabinet base is connected to the electric control cabinet body and is provided with a first recessed portion that fits with the outer peripheral surface of the second cylinder of the second shell and tube heat exchanger, and the first recessed portion is connected to the outer peripheral surface of the second cylinder.

[0042] In some embodiments, the electrical control cabinet also includes a supporting component inclined relative to the electrical control cabinet body, one end of the supporting component is connected to the electrical control cabinet body, and the other end of the supporting component is separated from one end of the electrical control cabinet body close to the base of the electrical control cabinet and connected to the second cylinder of the second shell and tube heat exchanger.

[0043] In some embodiments, the electrical control cabinet also includes a connecting component connected to one end of the supporting component close to the second cylinder, the connecting component includes a connecting component base connected to the supporting component and two side panels respectively connected to the connecting component base and arranged along the circumference of the second cylinder, the edges of the two side plates at one end away from the connecting component base extend along the first direction and are attached to the second cylinder, and the edges are connected to the second cylinder.

[0044] In some embodiments,

[0045] The dimension of the electric control cabinet body in the third direction is 65%-85% of the radius of the first cylinder or the second cylinder, and the third direction is perpendicular to the first direction and the second direction; and / or

[0046] The supporting component is inclined relative to the second direction and the third direction, the third direction is perpendicular to the first direction and the second direction, the first distance of the supporting component in the third direction is 60%-80% of the size of the electric control cabinet body in the third direction, and the second distance of the supporting component in the second direction is 10%-25% of the size of the electric control cabinet body in the third direction.

[0047] In some embodiments, the refrigerant circulation unit further comprises:

[0048] A screw compressor, wherein the axial direction of the screw compressor is parallel to the first cylinder and is installed on the first cylinder;

[0049] an oil separator, which is in communication with the exhaust port of the screw compressor, the oil separator and the screw compressor are arranged along the second direction and are mounted on the second cylinder of the second shell and tube heat exchanger;

[0050] The first compressor support comprises a first compressor base connected to the screw compressor and a first connecting portion provided on a side of the first compressor base away from the screw compressor, wherein an end of the first connecting portion away from the first compressor base is provided with a second recessed portion which is in contact with and connected to an outer peripheral surface of the first cylinder; or

[0051] The oil separator support includes an oil separator base connected to the oil separator and a second connecting portion arranged on a side of the oil separator base away from the oil separator. An end of the second connecting portion away from the oil separator base is provided with a third recessed portion that is in contact with and connected to the outer peripheral surface of the second cylinder.

[0052] According to another aspect of the present invention, an air conditioning system is also provided, the air conditioning system comprising the above-mentioned refrigerant circulation unit

[0053] By applying the technical solution of the present application, the first shell and tube heat exchanger and the second shell and tube heat exchanger are arranged side by side and the first tube sheet and the second tube sheet are connected together, thereby improving the overall rigidity of the refrigerant circulation unit and effectively improving the seismic performance of the refrigerant circulation unit.

[0054] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0056] Figure 1 A schematic diagram showing the three-dimensional structure of a refrigerant circulation unit according to an embodiment of the utility model is shown;

[0057] Figure 2 A schematic diagram of the explosion structure of a refrigerant circulation unit according to an embodiment of the utility model is shown;

[0058] Figure 3 A schematic structural diagram of a tube sheet of a shell and tube heat exchanger of a refrigerant circulation unit according to an embodiment of the utility model is shown;

[0059] Figure 4 A schematic diagram of the top view of the tube sheet of the shell and tube heat exchanger of the refrigerant circulation unit of the embodiment of the utility model is shown;

[0060] Figure 5 A schematic structural diagram of a base of a refrigerant circulation unit according to an embodiment of the utility model is shown;

[0061] Figure 6 A schematic diagram of the top view of the base of the refrigerant circulation unit according to an embodiment of the utility model is shown;

[0062] Figure 7 A three-dimensional structural schematic diagram of an electric control cabinet of a refrigerant circulation unit according to an embodiment of the utility model is shown;

[0063] Figure 8 A schematic diagram showing the side structure of an electric control cabinet of a refrigerant circulation unit according to an embodiment of the utility model; and

[0064] Fig. 9 The schematic diagram of the structure of the first compressor support and the oil separator support of the refrigerant circulation unit of the embodiment of the utility model is shown.

[0065] In the figure:

[0066] 1. First shell and tube heat exchanger; 11. First cylinder; 12. First tube sheet; 13. First middle tube sheet; 14. First water chamber; 2. Second shell and tube heat exchanger; 21. Second cylinder; 22. Second tube sheet; 23. Second middle tube sheet; 24. Second water chamber; 123. Tube sheet weld; 3. Base; 31. First base; 311. First bottom plate; 312. First web plate; 313. First rib plate; 314. First groove; 32. Second base; 321. Second bottom plate; 322. Second web plate; 323. Second rib plate; 324 , second groove; 33, base weld; 4, second compressor support; 5, oil separator; 6, screw compressor; 7, electric control cabinet; 71, electric control cabinet body; 72, electric control cabinet base; 73, supporting component; 74, first recessed portion; 75, connecting component; 751, connecting component base; 752, side plate; 8, oil separator support; 81, oil separator base; 82, second connecting portion; 83, third recessed portion; 9, first compressor support; 91, first compressor base; 92, first connecting portion; 93, second recessed portion. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0069] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0070] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0071] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0072] If there is no special explanation, the "include" and "comprising" mentioned in this application represent open-ended or closed-ended expressions. For example, "include" and "comprising" may represent that other components not listed may also be included or only listed components may be included or only listed components may be included.

[0073] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true or exists and B is false or does not exist; A is false or does not exist and B is true or exists; or both A and B are true or exist.

[0074] Combination Figures 1 to 4 As shown, the refrigerant circulation unit of this embodiment includes a first shell and tube heat exchanger 1 and a second shell and tube heat exchanger 2 .

[0075] The first shell and tube heat exchanger 1 comprises a first cylinder 11 extending in a first direction A, a first heat exchange tube for circulating a heat exchange medium arranged in the first cylinder 11, and a first tube sheet 12 perpendicular to the first direction A and supporting the first heat exchange tube; and

[0076] The second shell and tube heat exchanger 2 includes a second cylinder 21 extending along the first direction A and arranged side by side with the first cylinder 11 along a second direction B perpendicular to the first direction A, a second heat exchange tube for circulating heat exchange medium arranged in the second cylinder 21, and a second tube sheet 22 perpendicular to the first direction A and supporting the second heat exchange tube. The first tube sheet 12 and the second tube sheet 22 are located at the same end of the first direction A and are connected to form a whole.

[0077] In the technical solution of the present application, the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 are arranged side by side and the first tube sheet 12 and the second tube sheet 22 are connected together, thereby improving the overall rigidity of the refrigerant circulation unit and effectively improving the seismic performance of the refrigerant circulation unit.

[0078] In some embodiments, the first direction A is a horizontal direction, and the second direction B is a horizontal direction perpendicular to the first direction A.

[0079] In some embodiments, first tube sheets 12 are respectively provided at both ends of the first cylinder 11 along the first direction A, and second tube sheets 22 are respectively provided at both ends of the second cylinder 21 along the first direction. The first tube sheet 12 and the second tube sheet 22 located at the same end of the first direction A are connected into a whole.

[0080] The first tube sheet 12 and the second tube sheet 22 and the first cylinder 11 and the second cylinder 21 respectively located at the two ends of the first direction A form a quadrilateral frame structure, which further improves the overall rigidity of the refrigerant cycle unit, thereby improving the seismic performance of the condensing cycle unit.

[0081] Furthermore, the first tube sheet 12 and the second tube sheet 22 are respectively arranged at the ends of the first cylinder 11 and the second cylinder 21, which is simple in structure and easy to process compared to being arranged in the middle of the cylinder, and is conducive to simplifying the production process and reducing the production cost.

[0082] In some embodiments, the first shell and tube heat exchanger 1 includes at least two first tube sheets 12 arranged along the first direction, and the second shell and tube heat exchanger 2 includes at least two second tube sheets 22 arranged one-to-one with the first tube sheets 12, and the second tube sheets 22 are flush with and connected to the corresponding first tube sheets 12 in the first direction A. The first tube sheet 12 and the second tube sheet 22 and the first cylinder 11 and the second cylinder 21 form a quadrilateral or #-shaped frame structure, which further improves the overall rigidity of the refrigerant cycle unit, thereby improving the seismic performance of the condensing cycle unit.

[0083] The first tube sheet 12 has a first protrusion protruding toward the second cylinder 21 relative to the first cylinder 11 , and the second tube sheet 22 has a second protrusion protruding toward the first cylinder 11 relative to the second cylinder 21 , and the second protrusion is connected to the first protrusion.

[0084] The first protrusion and the second protrusion are welded, and the first tube sheet 12 and the second tube sheet 22 are connected together by a welding process. The welding process technology is mature, the production efficiency is high, and the connection strength is high, which is beneficial to ensure the rigidity and seismic resistance of the refrigerant circulation unit.

[0085] In some embodiments, the tube sheet weld 123 connecting the first protrusion and the second protrusion is perpendicular to the first direction A and perpendicular to the second direction B. The direction of the welding stress of the tube sheet weld 123 formed by welding the first protrusion and the second protrusion together is mainly concentrated in the direction toward the middle of the first cylinder 11 and the second cylinder 21, and the direction is located in a plane perpendicular to the first direction A. With respect to the stress tilted relative to the first direction A or the second direction B to generate stress that causes the tube sheet or the cylinder to twist, the stress distribution of the condensing cycle unit of this embodiment is reasonable, which is conducive to ensuring the structural stability of the refrigerant circulation unit.

[0086] In some embodiments, the first tube sheet 12 is rectangular or square, and the length or width of the first tube sheet 12 is greater than the diameter D of the first cylinder 11 to form the above-mentioned first protrusion. The second tube sheet 22 is rectangular or square, and the length or width of the second tube sheet 22 is greater than the diameter D of the second cylinder 21 to form the above-mentioned second protrusion.

[0087] The first tube sheet 12 and the second tube sheet 22 which are flush in the first direction A are welded into an integral large tube sheet, connecting the two shell and tube heat exchangers of the refrigerant circulation unit as a whole, thereby effectively improving the lateral rigidity and seismic resistance of the unit.

[0088] See also Figure 1 , 2As shown in FIGS. 5 and 6 , the refrigerant circulation unit also includes a base 3 supporting the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2. The base 3 includes a first base 31 supporting the first shell and tube heat exchanger 1 and connected to the first shell and tube heat exchanger 1, and a second base 32 supporting the second shell and tube heat exchanger 2 and connected to the second shell and tube heat exchanger 2. The first base 31 and the second base 32 are arranged side by side along the second direction B and connected together.

[0089] In this embodiment, the base 3 is arranged below the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2, and the first base 31 and the second base 32 are connected together to form an integral base 3, thereby improving the overall rigidity of the refrigerant circulation unit and effectively improving the seismic performance of the refrigerant circulation unit.

[0090] The first base 31 is provided with a first groove 314, and the shape of the cross section of the first groove 314 perpendicular to the first direction A matches the cross section of the first cylinder 11 perpendicular to the first direction A, at least the portion close to the first base 31, so that at least the portion close to the first base 31 of the first cylinder 11 is embedded in the first groove 314 and connected to the bottom of the first groove 314. In some embodiments, the first cylinder 11 and the bottom of the first groove 314 are welded.

[0091] Embedding the first cylinder 11 into the first groove 314 on the first base 31 is beneficial to improving the stability of the first cylinder 11 and reducing the height of the first cylinder 11, which is beneficial to lowering the center of gravity of the condensing cycle unit, thereby improving the stability and seismic resistance of the unit.

[0092] The second base 32 is provided with a second groove 324, and the shape of the cross section of the second groove 324 perpendicular to the first direction A matches the cross section of the second cylinder 21 perpendicular to the first direction A at least in a portion close to the second base 32, so that at least the portion of the second cylinder 21 close to the second base 32 is embedded in the second groove 324 and connected to the bottom of the second groove 324. In some embodiments, the second cylinder 21 is welded to the bottom of the second groove 324.

[0093] Embedding the second cylinder 21 into the second groove 324 on the second base 32 is beneficial to improving the stability of the second cylinder 21 and reducing the height of the second cylinder 21, which is beneficial to lowering the center of gravity of the condensing cycle unit, thereby improving the stability and seismic resistance of the unit.

[0094] The first base 31 includes a first bottom plate 311 and a first web 312 erected on the first bottom plate 311. The first web 312 forms a first groove 314 at one end away from the first bottom plate 311. The cross section of the first base 31 is roughly T-shaped, so it has the advantages of high rigidity and light weight, which is conducive to solving material problems and reducing costs while ensuring sufficient strength and rigidity. In some embodiments, the first bottom plate 311 and the first web 312 are welded.

[0095] The second base 32 includes a second bottom plate 321 and a second web 322 erected on the second bottom plate 321. A second groove 324 is formed at one end of the second web 322 away from the second bottom plate 321. The cross-section of the first base 31 is roughly T-shaped, so it has the advantages of high rigidity and light weight, which is conducive to solving material problems and reducing costs while ensuring sufficient strength and rigidity.

[0096] The first base 31 further includes a first rib 313 connecting the first bottom plate 311 and the first web 312 , so as to further enhance the strength and rigidity of the first base 31 .

[0097] The second base 32 further includes a second rib 323 connecting the second bottom plate 321 and the second web 322 , so as to further enhance the strength and rigidity of the second base 32 .

[0098] The refrigerant circulation unit includes at least two bases 3 arranged along the first direction A. The frame structure formed by the at least two bases 3 and the first cylinder 11 and the second cylinder 21 further improves the overall rigidity of the refrigerant circulation unit, thereby improving the seismic performance of the condensing circulation unit.

[0099] Referring to the figure, the first base 31 and the second base 32 are welded together, and specifically, the base weld 33 connecting the first base 31 and the second base 32 is perpendicular to the first direction A and perpendicular to the second direction B. The direction of the welding stress of the base weld 33 formed by welding the first base 31 and the second base 32 together is mainly concentrated in the direction toward the middle of the first cylinder 11 and the second cylinder 21, and the direction is located in a plane perpendicular to the first direction A. With respect to the stress tilted relative to the first direction A or the second direction B to generate stress that causes the base 3 or the cylinder to twist, the stress distribution of the condensing cycle unit of this embodiment is reasonable, which is conducive to ensuring the structural stability of the refrigerant circulation unit.

[0100] In this embodiment, the first base 31 and the second base 32 form an "inverted double arch" skeleton-type reinforced support to support the unit as a whole. The long web design strengthens the lateral stiffness of the unit. The skeleton-type multi-rib vertical plate arrangement enhances the longitudinal stiffness of the unit. The web and vertical plates strengthen the vertical stiffness of the unit.

[0101] See also Figure 1 ,2 , 7 and 8, the refrigerant circulation unit also includes an electric control cabinet 7, and the electric control cabinet 7 includes an electric control cabinet body 71 and an electric control cabinet base 72.

[0102] The electric control cabinet base 72 is connected to the electric control cabinet body 71 and is provided with a first recessed portion 74 which fits with the outer peripheral surface of the second cylinder 21 of the second shell and tube heat exchanger 2. The first recessed portion 74 is connected to the outer peripheral surface of the second cylinder 21, which is beneficial to improving the stability of the electric control cabinet 7 and also beneficial to reducing the height of the electric control cabinet 7 to lower the center of gravity of the refrigerant circulation unit and improve the stability and seismic resistance of the refrigerant circulation unit.

[0103] The electric control cabinet 7 further includes a support component 73 inclined relative to the electric control cabinet body 71, one end of the support component 73 is connected to the electric control cabinet body 71, and the other end of the support component 73 is separated from one end of the electric control cabinet body 71 close to the electric control cabinet base 72 and connected to the second cylinder 21 of the second shell and tube heat exchanger 2. The electric control cabinet body 71 and the support component 73 form a triangular support structure, which is conducive to improving stability and seismic resistance.

[0104] In some embodiments, there are at least two supporting components 73 , and the at least two supporting components are arranged along the axial direction of the second cylinder 21 .

[0105] The electric control cabinet 7 further includes a connecting component 75 connected to one end of the supporting component 73 close to the second cylinder 21, and the connecting component 75 includes a connecting component base 751 connected to the supporting component 73 and two side plates 752 respectively connected to the connecting component base 751 and arranged along the circumference of the second cylinder 21, and the edges of the two side plates 752 at one end away from the connecting component base 751 extend along the first direction A and are attached to the second cylinder 21, and the above-mentioned edges are connected to the second cylinder 21. The two side plates 752 are arranged along the circumference of the second cylinder 21 and are respectively connected to the above-mentioned second cylinder 21, which improves the stability of the connection, thereby improving the overall rigidity and anti-seismic performance of the refrigerant circulation unit.

[0106] See also Figure 1 , 2 9, the refrigerant circulation unit further includes a screw compressor 6 and an oil separator 5. The axial direction of the screw compressor 6 is parallel to the first cylinder 11 and is installed on the first cylinder 11. The oil separator 5 is connected to the exhaust port of the screw compressor 6, and the oil separator 5 and the screw compressor 6 are arranged along the second direction B and installed on the second cylinder 21 of the second shell and tube heat exchanger 2. The screw compressor 6 and the oil separator 5 are arranged on the first cylinder 11 and the second cylinder 21 respectively, so that the weight of the refrigerant circulation unit is distributed as evenly as possible, which is conducive to improving the stability of the unit.

[0107] In some embodiments, the refrigerant circulation unit includes two screw compressors 6, and the two screw compressors 6 are respectively arranged at two ends of the first cylinder 11. Optionally, the screw compressor 6 is arranged above the first cylinder 11.

[0108] See also Fig. 9 The refrigerant circulation unit further includes a first compressor support 9. The first compressor support 9 includes a first compressor base 91 connected to the screw compressor 6 and a first connecting portion 92 provided on a side of the first compressor base 91 away from the screw compressor 6. The end of the first connecting portion 92 away from the first compressor base 91 is provided with a second recessed portion 93 that is attached to and connected to the outer peripheral surface of the first cylinder 11, which is conducive to reducing the height of the screw compressor 6 and the center of gravity of the refrigerant circulation unit, thereby improving the stability and seismic resistance of the refrigerant circulation unit.

[0109] See also Fig. 9 The refrigerant circulation unit further includes an oil separator support 8. The oil separator support 8 includes an oil separator base 81 connected to the oil separator 5 and a second connection portion 82 provided on a side of the oil separator base 81 away from the oil separator 5, and an end of the second connection portion 82 away from the oil separator base 81 is provided with a third recessed portion 83 that is attached to and connected to the outer peripheral surface of the second cylinder 21, which is conducive to reducing the height of the oil separator 5 and the center of gravity of the refrigerant circulation unit, thereby improving the stability and seismic resistance of the refrigerant circulation unit.

[0110] See also Figure 2 The refrigerant circulation unit further includes a second compressor support 4. The second compressor support 4 and the first compressor support 9 are arranged in sequence along the axial direction of the screw compressor 6 to improve the stability of the support for the screw compressor 6, thereby improving the seismic performance of the refrigerant circulation unit.

[0111] Furthermore, the second compressor support 4 includes a second compressor base connected to the screw compressor 6 and a third connecting portion arranged on a side of the second compressor base away from the screw compressor 6, and an end of the third connecting portion away from the second compressor base is provided with a third recessed portion that is bonded to and connected to the outer peripheral surface of the first cylinder 11.

[0112] In some embodiments, the third recessed portion is welded to the first cylinder 11 , and the weld between the third recessed portion and the first cylinder 11 extends along the circumference of the first cylinder 11 and is perpendicular to the axial direction of the first cylinder 11 .

[0113] In summary, the utility model aims to provide a high-rigidity support method and a seismic-resistant twin-screw unit. The high-rigidity support method effectively improves the overall rigidity of the seismic-resistant twin-screw unit, thereby improving the seismic reliability of the air-conditioning equipment structure, and ensuring the basic conditions for the reliable operation of the air-conditioning equipment during and after an earthquake, so that the air-conditioning equipment can normally and reliably provide a comfortable environment and operating environment for the target factory personnel and key equipment.

[0114] This embodiment provides a refrigerant circulation unit with a seismic-resistant twin-screw with a high-rigidity support method, such as Figure 1 A structural schematic diagram of a high-rigidity support refrigerant circulation unit is shown.

[0115] Usually, the oil separator 5, screw compressor 6 and electric control cabinet 7 of the water-cooled screw unit are placed on the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2. The center of gravity of the whole machine is high, the rigidity is low, and the displacement is large under strong earthquakes. Therefore, the present application provides a high rigidity support method for a water-cooled screw unit, that is, an "inverted double arch" skeleton reinforced base 3 and an integral large tube sheet including a first tube sheet 12 and a second tube sheet 22 are used to integrally fix and support the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 of the earthquake-resistant twin-screw unit, and a high-rigidity oil separator support 8 and a first compressor support 9 are used to fix and support the oil separator 5 and the screw compressor 6, and at the same time, a high-rigidity electric control cabinet 7 is used, which greatly enhances the overall rigidity of the earthquake-resistant twin-screw unit, reduces its deformation displacement under earthquake impact, and improves the earthquake-resistant reliability of the whole machine structure.

[0116] like Figure 2 As shown, the first cylinder 11, the square first tube sheet 12, and the first water chamber 14 of the first shell and tube heat exchanger 1 are symmetrically distributed about the first middle tube sheet 13. Figure 2 Taking the left side parts of the earthquake-resistant twin-screw unit as an example, one side of the first cylinder 11 is connected to the first middle tube sheet 13 by welding, and the other side of the first cylinder 11 is connected to the square first tube sheet 12 by welding. The square first tube sheet 12 is connected to the first water chamber 14 by bolts, thereby forming the first shell and tube heat exchanger 1. The implementation method of the second shell and tube heat exchanger 2 is similar. The second middle tube sheet 23, the second cylinder 21, the square second tube sheet 22, and the first water chamber 14 are sequentially connected to form the first shell and tube heat exchanger 1. Meanwhile, the contact area of ​​the square first tube sheet 12 and the square second tube sheet 22 are welded to form an integral large tube sheet, which connects the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 into a whole, with strong integrity, effectively improving the lateral stiffness of the earthquake-resistant twin-screw unit.

[0117] The arrangement structure of the second cylinder 21 , the square second tube sheet 22 , and the second water chamber 24 of the second shell and tube heat exchanger 2 is similar to that of the first shell and tube heat exchanger 1 , and will not be described in detail herein.

[0118] In some embodiments, the thickness of the first tube sheet 12 is greater than 5 times the thickness of the first cylinder 11, and the thickness direction of the first tube sheet 12 is parallel to the first direction A. The thickness of the second tube sheet 22 is greater than 5 times the thickness of the second cylinder 21. The rigidity of the first tube sheet 12 and the second tube sheet 22 is advantageously ensured, thereby ensuring the stability and shock resistance of the refrigerant circulation unit.

[0119] In some embodiments, in order to align the first tube sheet 12 and the second tube sheet 22 in the first direction A and improve the regularity of the structure, the thickness of the first tube sheet 12 and the second tube sheet 22 are uniform.

[0120] In some embodiments, the length of the first tube sheet 12 is greater than the diameter of the first cylinder 11, the length direction of the first tube sheet 12 is parallel to the second direction B, and the length of the second tube sheet 22 is greater than the diameter of the second cylinder 21, so as to facilitate connecting the first tube sheet 12 and the second tube sheet 22 together to form a stable frame structure of the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2, thereby improving the stability and seismic resistance of the refrigerant circulation unit.

[0121] Further, the width of the first tube sheet 12 is greater than the diameter of the first cylinder 11, and the width direction of the first tube sheet 12 is perpendicular to the first direction A and the second direction B. The width of the second tube sheet 22 is greater than the diameter of the second cylinder 21, and the width direction of the second tube sheet 22 is perpendicular to the first direction A and the second direction B. Specifically, the aforementioned length direction is the horizontal second direction B, and the aforementioned width direction is the vertical direction.

[0122] Specifically, taking the first shell and tube heat exchanger 1 as an example, the length and width of the square first tube sheet 12 need to be greater than the diameter D of the first cylinder 11, and the thickness must be at least 5 times the thickness of the first cylinder 11, so as to ensure the rigidity of the square first tube sheet 12 itself and better play the role of strengthening the lateral rigidity of the anti-seismic twin-screw unit.

[0123] Furthermore, an integrated high-rigidity electrical control cabinet 7 is installed on the second cylinder 21 of the second shell and tube heat exchanger 2, the oil separator 5 is fixed on the second cylinder 21 of the second shell and tube heat exchanger 2 through the oil separator support 8, and the screw compressor 6 is fixed on the first cylinder 11 of the first shell and tube heat exchanger 1 through the compressor support 9.

[0124] The first connection portion 92 includes a first support plate, and the second connection portion 82 includes a second support plate. The number of the first support plates is greater than that of the second support plates.

[0125] Among them, according to the weight distribution of the oil separator 5 and the screw compressor 6, the oil separator support 8 adopts a double vertical plate support (two second support plates) form, and the first compressor support 9 adopts a three-vertical plate (three first support plates) support form, with high structural rigidity, and respectively provides fixed support for the oil separator 5 and the screw compressor 6. Therefore, the upper components of the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 not only have high rigidity, but also have good rigidity consistency, ensuring that the electric control cabinet 7, the oil separator 5, and the screw compressor 6 move in the same phase under the impact of an earthquake, reducing the risk of relative displacement of components, and improving the seismic reliability of the seismic-resistant twin-screw unit.

[0126] Importantly, the "inverted double arch" skeleton-type reinforced base 3 is connected to the first cylinder 11 and the second cylinder 21 of the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 by welding. At least four groups of "inverted double arch" skeleton-type reinforced bases 3 integrally support the first shell and tube heat exchanger 1, the second shell and tube heat exchanger 2 and the oil separator 5, the screw compressor 6, the electric control cabinet 7, etc. on the upper layer thereof, and further strengthen and connect the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 on the lower layer of the seismic twin-screw unit as a whole, and at the same time improve the lateral, longitudinal and vertical stiffness of the seismic twin-screw unit, thereby effectively reducing the seismic deformation displacement of the seismic twin-screw unit, avoiding the relative displacement of the main components, and significantly improving the seismic reliability of the equipment;

[0127] like Figure 3 and 4 As shown, as before, the square first tube sheet 12 and the square second tube sheet 22 form an integral large tube sheet. The tube sheet serves as a key connecting piece between the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2, and has strong integrity and good rigidity.

[0128] See also Figure 5 and 6 The "inverted double arch" skeleton reinforced base 3 is formed by welding the first base 31 and the second base 32. The first base 31 is formed by welding the first web 312, the first bottom plate 311 and the first rib 313; the second base 32 is formed by welding the second web 322, the second bottom plate 321 and the second rib 323. Specifically, the first base 31 and the second base 32 are welded together by the base weld 33 of the first web 312 and the second web 322, and the first bottom plate 311 and the second bottom plate 321, that is, the "inverted double arch" skeleton reinforced base 3.

[0129] Among them, taking the first base 31 as an example, the first ribs 313 are evenly arranged in a skeleton-like manner in the transverse direction of the unit, with a number of not less than 4, and multiple first ribs 313 are symmetrically distributed about the first web 312; the thickness of the first web 312, the first bottom plate 311 and the first rib 313 is at least not less than 2 times the thickness of the first cylinder of the first shell and tube heat exchanger. Based on this characteristic point design, the web structure of the "inverted double arch" skeleton-type reinforced base 3 strengthens the transverse rigidity of the unit, the skeleton-type multi-vertical plate structure strengthens the longitudinal rigidity of the unit, and the web and vertical plates simultaneously strengthen the vertical rigidity of the unit. At least 4 groups of "inverted double arch" skeleton-type reinforced bases 3 support the first shell and tube heat exchanger 1 and the second shell and tube heat exchanger 2 and the upper structure, which greatly improves the transverse, longitudinal and vertical rigidity of the earthquake-resistant twin-screw unit;

[0130] It is worth noting that the overall dimensions of the square first tube sheet 12, the square second tube sheet 22, the first base 31 and the second base 32 can be appropriately adjusted according to the size of the supported object, and the relative size adjustment range is not greater than 15% to maintain the consistency of the stiffness of the support and avoid the risk of relative displacement of the supported object.

[0131] 5 and 6, in some embodiments, the cross section of the first groove 314 perpendicular to the first direction A is a first arc, and the arc length L of the first arc is 30%-50% of the circumference of the first cylinder 11. The cross section of the second groove 324 perpendicular to the first direction A is a second arc, and the arc length of the second arc is 30%-50% of the circumference of the second cylinder 21.

[0132] The longer the arc length is, the larger the central angle of the corresponding arc is, that is, the deeper the cylinder is embedded in the groove, so the stability of the cylinder is greater, which is beneficial to improving the stability and earthquake resistance of the refrigerant circulation unit.

[0133] The width of the first bottom plate 311 is a first width Y, the width direction of the first bottom plate 311 is parallel to the first direction A, the radius of the first cylinder 11 is a first radius R, wherein the first width Y≥first radius R*90%.

[0134] The width of the second bottom plate 321 is the second width, the width direction of the second bottom plate 321 is parallel to the first direction A, the radius of the second cylinder 21 is the second radius, wherein the second width ≥ the second radius R*90%.

[0135] The first bottom plate 311 and the second bottom plate 321 are supported on the ground. The first bottom plate 311 and the second bottom plate 321 of sufficient width can provide stable support to improve the stability and shock resistance of the refrigerant circulation unit.

[0136] In some embodiments, in order to simplify processing and improve the versatility of the product, the width of the first bottom plate 311 and the width of the second bottom plate 321 are the same.

[0137] The distance that the first web 312 protrudes from one end of the first groove 314 along the second direction B in the second direction B is a first length X, and the radius of the first cylinder 11 is a first radius R, wherein the first radius R*70%≥first length X≥first radius R*55%.

[0138] The distance that the second web 322 protrudes from one end of the second groove 324 along the second direction B in the second direction B is the second length, and the radius of the second cylinder 21 is the second radius, wherein second radius*70%≥second length X≥second radius*55%.

[0139] The greater the length of the first web 312 and the second web 322, the higher the stability of the base 3. The corresponding relationship between the length of the web and the radius of the cylinder is fully considered, and space is saved while improving stability to improve the compactness of the unit.

[0140] Importantly, taking the first base 31 of the "inverted double arch" skeleton reinforced base 3 as an example, the radius of the arched section of the first web 312 is equivalent to the radius D / 2 of the first cylinder 11 of the first shell and tube heat exchanger 1, the arc length of the first arc is 30%-50% of the circumference πD of the first cylinder 11, the width Y of the first bottom plate 311 is not less than 90% of the radius D / 2 of the shell and tube heat exchanger cylinder, and the sum of the thickness of the combined first web 312 and the total width of the first rib 313 should be equivalent to the first width Y of the first bottom plate 311, thereby ensuring sufficient supporting contact area between the first base 31 and the first cylinder 11 of the first shell and tube heat exchanger 1 to avoid stress concentration.

[0141] The length X of the arched section protruding outward from the first web 312 should not be less than 55% of the radius R of the shell and tube heat exchanger cylinder, and should not be greater than 70% of the radius R of the shell and tube heat exchanger cylinder. This is a better way to improve the lateral support stiffness of the unit of the "inverted double arch" skeleton-type reinforced base 3.

[0142] like Figure 7 and 8 As shown, as a key component for the earthquake-resistant twin-screw unit to operate reliably during and after an earthquake, the integrated electric control cabinet 7 is composed of an electric control cabinet body 71, an electric control cabinet base 72 and two inclined support components 73, and is integrally welded to the second shell and tube heat exchanger 2. The electric control cabinet base 72 adopts a double vertical plate support form, and the two inclined support components 73 are combined to support the electric control cabinet body 71 in three directions, so that the electric control cabinet 7 has high rigidity in the horizontal, longitudinal and vertical directions of the earthquake-resistant twin-screw unit, effectively reducing its own deformation displacement under earthquake impact, and providing stable and reliable operating conditions for the earthquake-resistant twin-screw unit.

[0143] The dimension h of the electric control cabinet body 71 in the third direction is 65%-85% of the radius of the first cylinder 11 or the second cylinder 21 , and the third direction is perpendicular to the first direction A and the second direction B.

[0144] The third direction is the vertical direction, which reasonably optimizes the relationship between the height of the electric control cabinet body 71 and the diameter of the second cylinder 21, which is not only beneficial to ensure the overall rigidity of the unit, but also beneficial to lowering the overall center of gravity of the unit to improve the stability of the unit.

[0145] The support component 73 is inclined relative to the second direction B and the third direction, the third direction is perpendicular to the first direction A and the second direction B, the first distance a of the support component 73 in the third direction is 60%-80% of the dimension h of the electric control cabinet body 71 in the third direction, and the second distance b of the support component 73 in the second direction B is 10%-25% of the dimension h of the electric control cabinet body 71 in the third direction. By utilizing limited space and adopting reasonable dimensions, a stable triangular support structure composed of the support component 73 and the electric control cabinet body 71 is formed, which further improves the stability and anti-seismic performance of the unit.

[0146] Furthermore, the height A of the electric control cabinet body 71 of the electric control cabinet 7 provided by the utility model is 65%-85% of the radius R of the shell and tube heat exchanger cylinder, the vertical height a of the two inclined support parts 73 is 60%-80% of the height A of the electric control cabinet body 71, and the horizontal length b is 10%-25% of the height A of the electric control cabinet body 71. Under the limitation of the size of the first shell and tube heat exchanger 1, the optimal triangular inclined support angle is provided to maximize the optimization of the lateral stiffness of the electric control cabinet 7 in the unit.

[0147] In general, the whole machine fixed frequency of conventional water-cooled screw units is low, and a high-rigidity support method is provided for this purpose: the shell and tube heat exchanger uses an "inverted double arch" skeleton-type reinforced base 3 and an integral large tube sheet, and the oil separator and compressor are fixedly supported by a high-rigidity oil separator support 8 and a first compressor support 9, and are matched with an integrated high-rigidity electric control cabinet 7. The first-order fixed frequency of the earthquake-resistant twin-screw unit provided by the utility model is significantly improved, which can meet the high earthquake-resistant requirements for air-conditioning equipment in most earthquake areas, and can operate stably and reliably during and after an earthquake, providing a comfortable environment and operating environment for the target plant personnel and key equipment.

[0148] The refrigerant circulation unit of this embodiment mainly achieves the following technical effects:

[0149] 1. In the high-rigidity support method of the utility model, two square tube sheets are applied at the ends of the shell and tube heat exchanger, and the tube sheets on the same side are welded into an integral large tube sheet, so that the two shell and tube heat exchangers of the unit are connected as a whole, which effectively improves the lateral rigidity of the seismic twin-screw unit;

[0150] 2. In the high-rigidity support method of the utility model, an "inverted double-arch" skeleton-type reinforced support is used to support the anti-seismic twin-screw unit as a whole. The long web design strengthens the lateral rigidity of the unit. The skeleton-type multi-vertical plate arrangement enhances the longitudinal rigidity of the unit. The web and vertical plates strengthen the vertical rigidity of the unit.

[0151] 3. The earthquake-resistant twin-screw unit of the utility model connects the shell and tube heat exchanger of the unit into one through the "inverted double arch" skeleton-type reinforced support and the integral large tube plate, which has strong integrity and makes up for the shortcoming that the upper electric control cabinet, compressor, and oil separator have a high center of gravity and lower the rigidity of the unit. At the same time, the electric control cabinet is reliably fixed to the shell and tube heat exchanger through a high-rigidity bracket, and the compressor and oil separator are reliably fixed to the shell and tube heat exchanger through a high-rigidity support. The first-order fixed frequency of the equipment is significantly improved, the rigidity is improved, and the high earthquake-resistant reliability of the unit is guaranteed.

[0152] According to another aspect of the present invention, an air conditioning system is provided, and the air conditioning system includes the above-mentioned refrigerant circulation unit.

[0153] The above are only exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigerant circulation unit, characterized in that: include: A first shell and tube heat exchanger (1), comprising a first cylinder (11) extending in a first direction (A), a first heat exchange tube arranged in the first cylinder (11) for circulating a heat exchange medium, and a first tube sheet (12) perpendicular to the first direction (A) and supporting the first heat exchange tube; and The second shell and tube heat exchanger (2) comprises a second cylinder (21) extending along the first direction (A) and arranged side by side with the first cylinder (11) along a second direction (B) perpendicular to the first direction (A), a second heat exchange tube arranged in the second cylinder (21) for circulating a heat exchange medium, and a second tube sheet (22) perpendicular to the first direction (A) and supporting the second heat exchange tube, wherein the first tube sheet (12) and the second tube sheet (22) are located at the same end in the first direction (A) and are connected to form a whole.

2. The refrigerant circulation unit according to claim 1, characterized in that: The first tube sheet (12) is respectively provided at both ends of the first cylinder (11) along the first direction (A), and the second tube sheet (22) is respectively provided at both ends of the second cylinder (21) along the first direction, and the first tube sheet (12) and the second tube sheet (22) located at the same end in the first direction (A) are connected to form a whole; and / or The first shell and tube heat exchanger (1) comprises at least two first tube sheets (12) arranged along the first direction, and the second shell and tube heat exchanger (2) comprises at least two second tube sheets (22) arranged in one-to-one correspondence with the first tube sheets (12), and the second tube sheets (22) are flush with the corresponding first tube sheets (12) in the first direction (A) and are connected together.

3. The refrigerant circulation unit according to claim 1 or 2, characterized in that: The first tube sheet (12) has a first protrusion protruding toward the second cylinder (21) relative to the first cylinder (11), and the second tube sheet (22) has a second protrusion protruding toward the first cylinder (11) relative to the second cylinder (21), and the second protrusion is connected to the first protrusion.

4. The refrigerant circulation unit according to claim 3, characterized in that: The first protrusion and the second protrusion are welded.

5. The refrigerant circulation unit according to claim 3, characterized in that: The tube sheet weld (123) connecting the first protrusion and the second protrusion is perpendicular to the first direction (A) and perpendicular to the second direction (B).

6. The refrigerant circulation unit according to claim 1, characterized in that: The thickness of the first tube sheet (12) is greater than 5 times the thickness of the first cylinder (11), and the thickness direction of the first tube sheet (12) is parallel to the first direction (A); and / or The length of the first tube sheet (12) is greater than the diameter of the first cylinder (11), and the length direction of the first tube sheet (12) is parallel to the second direction (B); and / or The width of the first tube sheet (12) is greater than the diameter of the first cylinder (11), and the width direction of the first tube sheet (12) is perpendicular to the first direction (A) and the second direction (B); and / or The thickness of the second tube sheet (22) is greater than 5 times the thickness of the second cylinder (21), and the thickness direction of the second tube sheet (22) is parallel to the first direction (A); and / or The length of the second tube sheet (22) is greater than the diameter of the second cylinder (21), and the length direction of the second tube sheet (22) is parallel to the second direction (B); and / or The width of the second tube sheet (22) is greater than the diameter of the second cylinder (21), and the width direction of the second tube sheet (22) is perpendicular to the first direction (A) and the second direction (B).

7. The refrigerant circulation unit according to claim 1, characterized in that: The invention also comprises a base (3) supporting the first shell and tube heat exchanger (1) and the second shell and tube heat exchanger (2), wherein the base (3) comprises a first base (31) supporting the first shell and tube heat exchanger (1) and connected to the first shell and tube heat exchanger (1), and a second base (32) supporting the second shell and tube heat exchanger (2) and connected to the second shell and tube heat exchanger (2), wherein the first base (31) and the second base (32) are arranged side by side and connected together along the second direction (B).

8. The refrigerant circulation unit according to claim 7, characterized in that: A first groove (314) is provided on the first base (31), and the shape of a cross section of the first groove (314) perpendicular to the first direction (A) matches a cross section of the first cylinder (11) perpendicular to the first direction (A) at least in a portion close to the first base (31), so that at least a portion of the first cylinder (11) close to the first base (31) is embedded in the first groove (314) and connected to the bottom of the first groove (314); and / or A second groove (324) is provided on the second base (32), and the shape of a cross section of the second groove (324) perpendicular to the first direction (A) matches a cross section of the second cylinder (21) perpendicular to the first direction (A) at least close to the second base (32), so that at least a portion of the second cylinder (21) close to the second base (32) is embedded in the second groove (324) and connected to the bottom of the second groove (324).

9. The refrigerant circulation unit according to claim 8, characterized in that: The first base (31) comprises a first bottom plate (311) and a first web (312) erected on the first bottom plate (311), and the first groove (314) is formed at one end of the first web (312) away from the first bottom plate (311); and / or The second base (32) comprises a second bottom plate (321) and a second web (322) erected on the second bottom plate (321), and the second groove (324) is formed at one end of the second web (322) away from the second bottom plate (321).

10. The refrigerant circulation unit according to claim 9, characterized in that: The first base (31) further comprises a first rib (313) connecting the first bottom plate (311) and the first web (312); and / or The second base (32) further comprises a second rib plate (323) connecting the second bottom plate (321) and the second web plate (322).

11. The refrigerant circulation unit according to claim 9, characterized in that: The cross section of the first groove (314) perpendicular to the first direction (A) is a first arc, and the arc length (L) of the first arc is 30%-50% of the circumference of the first cylinder (11); and / or The cross section of the second groove (324) perpendicular to the first direction (A) is a second arc shape, and the arc length of the second arc shape is 30%-50% of the circumference of the second cylinder (21); and / or The width of the first bottom plate (311) is a first width (Y), the width direction of the first bottom plate (311) is parallel to the first direction (A), the radius of the first cylinder (11) is a first radius, wherein the first width (Y) is ≥ the first radius*90%; and / or The width of the second bottom plate (321) is a second width, the width direction of the second bottom plate (321) is parallel to the first direction (A), the radius of the second cylinder (21) is a second radius, wherein the second width is ≥ 90% of the second radius; and / or The distance that the first web (312) protrudes from one end of the first groove (314) along the second direction (B) in the second direction (B) is a first length (X), and the radius of the first cylinder (11) is a first radius, wherein the first radius*70%≥the first length (X)≥the first radius*55%; and / or The distance that the second web (322) protrudes from one end of the second groove (324) along the second direction (B) in the second direction (B) is a second length, and the radius of the second cylinder (21) is a second radius, wherein the second radius*70%≥the second length≥the second radius*55%.

12. The refrigerant circulation unit according to claim 7, characterized in that: It comprises at least two bases (3) arranged along the first direction (A).

13. The refrigerant circulation unit according to claim 1, characterized in that: It also includes an electric control cabinet (7), wherein the electric control cabinet (7) includes: Electric control cabinet body (71); an electric control cabinet base (72), connected to the electric control cabinet body (71) and provided with a first recessed portion (74) that fits with the outer peripheral surface of the second cylinder (21) of the second shell and tube heat exchanger (2), the first recessed portion (74) being connected to the outer peripheral surface of the second cylinder (21); and A support component (73) is inclined relative to the electric control cabinet body (71); one end of the support component (73) is connected to the electric control cabinet body (71); the other end of the support component (73) is separated from an end of the electric control cabinet body (71) close to the electric control cabinet base (72) and connected to the second cylinder (21) of the second shell and tube heat exchanger (2).

14. The refrigerant circulation unit according to claim 13, characterized in that: The electric control cabinet (7) further comprises a connecting component (75) connected to one end of the supporting component (73) close to the second cylinder (21), the connecting component (75) comprising a connecting component base (751) connected to the supporting component (73) and two side plates (752) respectively connected to the connecting component base (751) and arranged along the circumference of the second cylinder (21), the edges of the two side plates (752) at one end away from the connecting component base (751) extending along the first direction (A) and attached to the second cylinder (21), and the edges are connected to the second cylinder (21).

15. The refrigerant circulation unit according to claim 13, characterized in that: The dimension (h) of the electric control cabinet body (71) in the third direction is 65%-85% of the radius of the first cylinder (11) or the second cylinder (21), and the third direction is perpendicular to the first direction (A) and the second direction (B); and / or The support component (73) is inclined relative to the second direction (B) and a third direction, the third direction is perpendicular to the first direction (A) and the second direction (B), a first distance (a) between two ends of the support component (73) in the third direction is 60%-80% of a dimension (h) of the electric control cabinet body (71) in the third direction, and a second distance (b) between two ends of the support component (73) in the second direction (B) is 10%-25% of the dimension (h) of the electric control cabinet body (71) in the third direction.

16. The refrigerant circulation unit according to claim 1, characterized in that: Also includes: A screw compressor (6), wherein the axial direction of the screw compressor (6) is parallel to the first barrel (11) and is mounted on the first barrel (11); an oil separator (5) connected to an exhaust port of the screw compressor (6), the oil separator (5) and the screw compressor (6) being arranged along the second direction (B) and mounted on the second cylinder (21) of the second shell and tube heat exchanger (2), A first compressor support (9), comprising a first compressor base (91) connected to the screw compressor (6) and a first connecting portion (92) provided on a side of the first compressor base (91) away from the screw compressor (6), wherein an end of the first connecting portion (92) away from the first compressor base (91) is provided with a second recessed portion (93) which is in contact with and connected to an outer peripheral surface of the first cylinder (11); The oil separator support (8) comprises an oil separator base (81) connected to the oil separator (5) and a second connecting portion (82) provided on a side of the oil separator base (81) away from the oil separator (5), wherein an end of the second connecting portion (82) away from the oil separator base (81) is provided with a third recessed portion (83) which is in contact with and connected to the outer peripheral surface of the second cylinder (21). The first connecting portion (92) comprises a first support plate, the second connecting portion (82) comprises a second support plate, and the number of the first support plates is greater than the number of the second support plates.

17. An air conditioning system, characterized in that: A refrigerant circulation unit comprising any one of claims 1 to 16.

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