Chillers and air conditioning systems

Abstract

This utility model relates to a chiller unit and an air conditioning system. The chiller unit includes: a compressor, including feet at the bottom; a first heat exchanger, located below the compressor; a first saddle, located on top of the first heat exchanger and supported by the feet; and a second saddle, located at the bottom of the first heat exchanger and supported by it. The stiffness of the feet differs from that of the first saddle, and the stiffness of the second saddle differs from that of the first saddle. The compressor, acting as a vibration source, is positioned on top of the first heat exchanger, using a layer-by-layer installation method. The vibration generated by the compressor is first transmitted downwards through the feet, which have a certain stiffness, and then transmitted through the first saddle (with a stiffness different from the feet) to the second saddle (with a stiffness different from the first saddle). Along this vibration transmission path, the difference and step in stiffness distribution between continuous structures create a mechanical impedance mismatch effect, thereby reducing the transmission efficiency of vibration energy.

Description

Technical Field

[0001] This utility model relates to the field of marine equipment, and in particular to a chiller unit and air conditioning system. Background Technology

[0002] In marine applications, chillers are key equipment, primarily used to provide cooling for the ship's air conditioning systems, cold storage facilities, and other equipment requiring cooling. However, ships are subject to various factors during navigation, such as waves and wind, resulting in varying degrees of vibration. These vibrations not only affect the comfort of the crew but can also damage precision equipment; for example, significant vibrations can even affect the normal operating efficiency of chillers. Utility Model Content

[0003] Some embodiments of this utility model propose a chiller unit and air conditioning system to alleviate the problem of excessive vibration in the chiller unit.

[0004] In one aspect of this utility model, a chiller unit is provided, comprising:

[0005] The compressor, including the feet located at the bottom;

[0006] The first heat exchanger is located below the compressor;

[0007] A first saddle, located on top of the first heat exchanger, and supported and connected to the machine feet; and

[0008] The second saddle is located at the bottom of the first heat exchanger and is supported and connected to the first heat exchanger.

[0009] The stiffness of the machine foot is different from that of the first saddle, and the stiffness of the second saddle is different from that of the first saddle.

[0010] In some embodiments, the stiffness of the machine foot is greater than the stiffness of the first saddle, and the stiffness of the second saddle is greater than the stiffness of the first saddle.

[0011] In some embodiments, the compressor further includes a body, which is integrally formed with the mounting feet.

[0012] In some embodiments, the first saddle includes:

[0013] A first connecting member is attached to the top of the first heat exchanger; and

[0014] A support member is disposed on the top of the first connector and is supported and connected to the machine foot. The support member is constructed as a hollow structure.

[0015] In some embodiments, the support member includes two hollow support beams spaced apart, the length extension direction of the support beams being consistent with the length extension direction of the compressor.

[0016] In some embodiments, the second saddle includes:

[0017] The second connector is connected to the bottom of the first heat exchanger;

[0018] A bracket is disposed at the bottom of the second connector; and

[0019] A mass block is disposed on the support, and the mass block is constructed as a solid structure.

[0020] In some embodiments, the support includes:

[0021] Base plate; and

[0022] Two support plates are arranged opposite to each other, and each support plate is respectively connected to the base plate and the second connecting member;

[0023] The mass block connects the two support plates.

[0024] In some embodiments, the surfaces of the two support plates are coated with a damping coating.

[0025] In some embodiments, the chiller unit further includes:

[0026] A chassis, wherein the compressor is mounted on top of the chassis; and

[0027] A water pump is located on top of the chassis and is spaced apart from the compressor along a first direction.

[0028] In some embodiments, the number of water pumps is two, the two water pumps are connected in series, and the two water pumps are spaced apart along a second direction of the chassis; the second direction is perpendicular to the first direction.

[0029] In some embodiments, the chiller unit further includes a mounting bracket disposed on top of the chassis, the water pump being disposed on the mounting bracket, and the rigidity of the mounting bracket being the same as that of the chassis.

[0030] In some embodiments, the chiller unit further includes a chassis, the second saddle being disposed on the chassis, and the chassis having the same rigidity as the second saddle.

[0031] In some embodiments, the chassis includes:

[0032] Top plate, the second saddle is disposed on the top plate;

[0033] A base plate, disposed opposite to the top plate; and

[0034] Multiple first reinforcing plates are disposed between the top plate and the bottom plate, and connect the top plate and the bottom plate.

[0035] In some embodiments, the compressor further includes:

[0036] First rotor;

[0037] The first bearing is located at both ends of the first rotor;

[0038] Drive shaft;

[0039] The second bearing is located at both ends of the drive shaft;

[0040] A coupling connecting one end of the first rotor and one end of the drive shaft; and

[0041] The second rotor meshes with the first rotor.

[0042] In some embodiments, the chiller unit is configured to be installed on a ship.

[0043] In one aspect of this utility model, an air conditioning system is provided, including an air conditioner and the above-described chiller unit, wherein the chiller unit is configured to provide a cooling source for the air conditioner.

[0044] Based on the above technical solution, this utility model has at least the following beneficial effects:

[0045] In some embodiments, the compressor, which serves as the vibration source, is arranged on top of the first heat exchanger and installed layer by layer. The vibration generated by the compressor is first transmitted downward through the machine feet with a certain stiffness, and then continues to propagate through the first saddle with a different stiffness than the machine feet. It is then transmitted through the first heat exchanger to the second saddle with a different stiffness than the first saddle, and finally to the foundation support. Along this vibration transmission path, the difference and step in stiffness distribution between continuous structures create a mechanical impedance mismatch effect. Specifically, the alternating connection of high-stiffness components and low-stiffness components causes the vibration to be reflected and attenuated at the interface, thereby reducing the transmission efficiency of vibration energy. Attached Figure Description

[0046] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0047] Figure 1 This is a schematic diagram of the structure of a chiller unit according to some embodiments of the present invention;

[0048] Figure 2This is a side view schematic diagram of a chiller unit provided according to some embodiments of the present utility model;

[0049] Figure 3 This is a schematic diagram of the structure of a first heat exchanger with a first saddle and a second saddle provided according to some embodiments of the present invention;

[0050] Figure 4 This is a schematic diagram of the compressor provided according to some embodiments of the present utility model;

[0051] Figure 5 This is a schematic diagram of the first structure of the first saddle according to some embodiments of the present utility model;

[0052] Figure 6 This is a schematic diagram of the second structure of the first saddle according to some embodiments of the present invention;

[0053] Figure 7 This is a schematic diagram of the structure of the second saddle according to some embodiments of the present invention;

[0054] Figure 8 This is a partial cross-sectional structural schematic diagram of a chassis provided according to some embodiments of the present utility model;

[0055] Figure 9 This is a schematic diagram of the structure of the mounting bracket provided according to some embodiments of the present utility model;

[0056] Figure 10 This is a schematic diagram illustrating the connection between the rotor and drive shaft of a compressor, based on some related technologies.

[0057] Figure 11 This is a schematic diagram of the connection between the rotor and the drive shaft of a compressor according to some embodiments of the present invention.

[0058] The labels in the attached diagram are explained as follows:

[0059] 1-Compressor; 11-Machine foot; 12-Machine body; 13-First rotor; 14-First bearing; 15-Drive shaft; 16-Second bearing; 17-Coupling; 18-Second rotor; 19-Stator; 1a-Air gap;

[0060] 2-First heat exchanger;

[0061] 3-First saddle; 31-First connector; 32-Support member; 321-Support beam;

[0062] 4-Second saddle; 41-Second connector; 42-Bracket; 421-Base plate; 422-Support plate; 43-Mass block;

[0063] 5-Chassis; 51-Top plate; 52-Bottom plate; 53-First reinforcing plate;

[0064] 6-Water pump;

[0065] 7-Mounting bracket; 71-Column; 72-Second reinforcing plate;

[0066] 8-Second heat exchanger.

[0067] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0068] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0069] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0070] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0071] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0072] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0073] In some related technologies, chiller units are often designed with a greater emphasis on cooling efficiency and energy efficiency ratio, while neglecting the importance of vibration control. This can lead to increased overall vibration levels when the chiller unit is used in environments such as ships or areas prone to earthquakes, thereby affecting the user's quality of life and the safe and stable operation of the equipment.

[0074] Based on this, some embodiments of the present invention provide a chiller unit and an air conditioning system to alleviate the problem of excessive vibration in the chiller unit.

[0075] refer to Figure 1 and Figure 2 In some embodiments, the chiller unit includes a compressor 1, a first heat exchanger 2, a first saddle 3, and a second saddle 4.

[0076] refer to Figure 4 The compressor 1 includes a foot 11 located at the bottom.

[0077] refer to Figure 1 and Figure 2 The first heat exchanger 2 is located below the compressor 1.

[0078] refer to Figures 1 to 3 The first saddle 3 is located on top of the first heat exchanger 2 and is supported and connected to the machine foot 11.

[0079] The second saddle 4 is located at the bottom of the first heat exchanger 2 and is supported and connected to the first heat exchanger 2.

[0080] Among them, the stiffness of the machine foot 11 is different from that of the first saddle 3, and the stiffness of the second saddle 4 is different from that of the first saddle 3.

[0081] Compressor 1 is one of the main vibration sources of the chiller unit. In the above embodiment, compressor 1, as the vibration source, is arranged on top of the first heat exchanger 2, and is installed layer by layer. The vibration generated by compressor 1 is first transmitted downward through the machine feet 11 with a certain stiffness, and then continues to propagate through the first saddle 3 with a different stiffness than the machine feet 11. Then it is transmitted through the first heat exchanger 2 to the second saddle 4 with a different stiffness than the first saddle 3, and finally to the foundation support (chassis 5). In this vibration transmission path, the difference and step of stiffness distribution between continuous structures form a mechanical impedance mismatch effect. Specifically, the alternating connection of high-stiffness components and low-stiffness components causes the vibration to be reflected and attenuated at the interface, thereby reducing the transmission efficiency of vibration energy.

[0082] In the above embodiments, the stiffness of the foot 11, the first saddle 3 and the second saddle 4 can be reflected by different masses. Under the condition of the same volume, the greater the mass, the greater the stiffness.

[0083] In the above embodiment, the compressor is arranged as the vibration source on top of the first heat exchanger 2. On the basis of ensuring the structural strength and reliability, in order to effectively suppress the transmission of vibration along the layer-by-layer installation path, the concept of "variable stiffness-to-mass ratio" is introduced. By constructing a continuous structure with non-homogeneous stiffness / mass, the significant differences and step changes in stiffness and mass distribution between each layer can effectively reduce coupled vibration. The variable stiffness-to-mass ratio structure can improve mechanical impedance and vibration transmission suppression, improve the mechanical impedance of the structural system in a wide frequency range, achieve effective isolation of vibration under wide frequency excitation conditions, and improve the vibration reduction performance of the whole system.

[0084] In some embodiments, there are two compressors 1, which are symmetrically arranged on top of the first heat exchanger 2.

[0085] In some embodiments, the two compressors 1 are arranged back-to-back to balance some vibrations.

[0086] In some embodiments, the two compressors 1 can be used selectively or simultaneously.

[0087] In some embodiments, the stiffness of the foot 11 is greater than the stiffness of the first saddle 3, and the stiffness of the second saddle 4 is greater than the stiffness of the first saddle 3.

[0088] In the above embodiment, the top foot 11 has high stiffness, the middle first saddle 3 has low stiffness, and the bottom second saddle 4 has high stiffness. Through the gradual change in stiffness, especially with the low-stiffness area in the middle serving as a buffer, the transmission of vibration from the compressor to the rest of the system can be effectively reduced, achieving good vibration isolation and attenuation effects. Furthermore, the high-stiffness top and bottom structures ensure the overall stability of the system, while the flexible design in the middle increases the system's adaptability, making it better able to cope with vibration inputs of different frequencies. Utilizing this variable stiffness design, mechanical impedance matching can be improved over a wider frequency range, enabling the system to maintain efficient vibration reduction performance under various operating conditions.

[0089] Among them, the broadband load damping structure connects components with significantly different impedances to reduce vibration transmission.

[0090] refer to Figure 4 In some embodiments, the compressor 1 also includes a body 12, which is integrally formed with the mounting feet 11.

[0091] In the above embodiment, the mounting feet 11 of the compressor 1 are integrally cast with the body 12, which can significantly improve the connection rigidity between the body 12 and the feet 11 of the compressor 1, reduce the risk of loosening or failure caused by the use of bolts or other connection methods, enhance the overall rigidity, and by designing the body 12 and the feet 11 as an integral unit, the transmission of vibration from the compressor 1 to the foundation support structure can be more direct and smooth, which helps to control the propagation of vibration in a specific direction, thereby more effectively isolating vibration and absorbing energy.

[0092] refer to Figure 5 In some embodiments, the first saddle 3 includes a first connector 31 and a support 32.

[0093] The first connector 31 is connected to the top of the first heat exchanger 2.

[0094] The support member 32 is located on the top of the first connector 31 and is supported and connected to the machine foot 11. The support member 32 is constructed as a hollow structure.

[0095] In the above embodiment, the support member 32 of the first saddle 3 adopts a hollow structure, which can reduce the stiffness of the first saddle 3 and reduce its weight; and due to the existence of its internal space, the hollow structure can act as a buffer to a certain extent to absorb and disperse vibration energy, thereby enhancing the vibration absorption and isolation effect; the hollow structure can adjust the stiffness and flexibility of the components, so as to form a more effective mechanical impedance matching in the vibration transmission path, which is conducive to the reflection and scattering of vibration energy and further improves the vibration reduction effect.

[0096] In some embodiments, the first connector 31 has an arc-shaped connecting surface, the curvature of which matches the external shape of the first heat exchanger 2, which facilitates the fitting and connection of the first connector 31 to the first heat exchanger 2.

[0097] In some embodiments, there are two first connectors 31, which are spaced apart along the length of the first heat exchanger 2, and the support member 32 connects the two first connectors 31.

[0098] In some embodiments, a weight-reducing hole may be provided at the bottom of the support member 32.

[0099] refer to Figure 6 In some embodiments, the support member 32 includes two hollow support beams 321 spaced apart, each support beam 321 extending in the same direction as the compressor 1. The length extension direction of the compressor 1 is also consistent with the length extension direction of the first heat exchanger 2.

[0100] In the above embodiment, two hollow support beams 321 are used to support the compressor 1, which can not only meet the support strength requirements, but also reduce the stiffness and weight compared to a solid structure. In addition, the two hollow support beams 321 have good vibration absorption characteristics, which can absorb and dissipate vibration energy to a certain extent and reduce the amount of vibration transmitted to other components.

[0101] In the above embodiment, the first saddle 3 is a component used to connect the compressor 1 and the first heat exchanger 2. The support member 32 at the top of the first saddle 3 has a hollow structure and its stiffness is much smaller than that of the compressor 1 foot 11. This allows for a significant change in the stiffness / mass ratio of adjacent structural components, thereby achieving vibration reduction through the abrupt change in the stiffness-mass ratio.

[0102] In some embodiments, the support beam 321 is made of hollow square steel.

[0103] In some embodiments, the chiller unit includes two compressors 1, each compressor 1 being supported on top of a first heat exchanger 2 via a first saddle 3. The two compressors 1 are spaced apart along the length of the first heat exchanger 2.

[0104] refer to Figure 7 In some embodiments, the second saddle 4 includes a second connector 41, a bracket 42, and a mass block 43.

[0105] The second connector 41 is connected to the bottom of the first heat exchanger 2.

[0106] The bracket 42 is located at the bottom of the second connector 41.

[0107] Mass block 43 is mounted on support 42 and is constructed as a solid structure.

[0108] In the above embodiment, the second saddle 4 includes a solid mass block 43, which increases the mass and rigidity of the second saddle 4, enabling the region to resist deformation more effectively; and the solid mass block 43 has higher stiffness, which helps to change the natural frequency of the system, thereby avoiding resonance with the external excitation frequency and reducing the potential risk of damage caused by resonance.

[0109] In the above embodiment, the support member 32 of the first saddle 3 adopts a hollow structure, which is beneficial to reduce stiffness. The second saddle 4 includes a solid mass block 43, which is beneficial to increase stiffness. The stiffness of the first saddle 3 and the second saddle 4 have a step difference. By utilizing the difference and step in stiffness / mass distribution between the structures, the mechanical impedance of the structural system in a wide frequency range can be improved, and high vibration reduction characteristics can be achieved.

[0110] In some embodiments, the second connector 41 is configured as an arc shape, having an arc-shaped surface that fits against the bottom of the first heat exchanger 2. The curvature of the arc-shaped surface of the second connector 41 is adapted to the outer contour of the first heat exchanger 2, facilitating a close fit between the arc-shaped surface of the second connector 41 and the first heat exchanger 2.

[0111] In some embodiments, the support 42 includes a base plate 421 and two opposing support plates 422. The two support plates 422 are spaced apart along the length of the first heat exchanger 2.

[0112] Both support plates 422 are respectively connected to the base plate 421 and the second connector 41. The mass block 43 connects the two support plates 422.

[0113] In the above embodiment, the upper part of the second saddle 4 is a second connecting member 41 with an arc-shaped surface, and the lower part is a base plate 421 with a flat surface. The second connecting member 41 and the base plate 421 are connected by two support plates 422 that are spaced apart. The support plates 422 are vertical plates. The two support plates 422 are connected by two solid mass blocks 43. Vibration propagates downward from the top through the support plates 422 and can be attenuated when passing through the large mass blocks 43.

[0114] In some embodiments, the mass block 43 is a solid steel block.

[0115] In some embodiments, there are two mass blocks 43, which are spaced apart and symmetrically arranged, and each mass block 43 is connected to two support plates 422 respectively.

[0116] In some embodiments, the surfaces of the two support plates 422 are coated with a damping coating.

[0117] In the above embodiments, the damping coating can absorb some of the vibration energy when the structure deforms and convert it into heat energy, thereby effectively reducing the vibration amplitude of the support plate 422; and the damping coating can also change the dynamic response characteristics of the support plate 422, reduce the resonance peak at a specific frequency, and reduce the risk of damage caused by resonance.

[0118] In some embodiments, weight-reduction holes may be provided on the support plate 422. Weight-reduction holes may also be provided on the second connector 41.

[0119] refer to Figure 1 , Figure 2 and Figure 8 In some embodiments, the chiller unit also includes a chassis 5 and a water pump 6.

[0120] The compressor 1 is located on top of the chassis 5. The water pump 6 is located on top of the chassis 5, and the water pump 6 and the compressor 1 are spaced apart along the first direction X.

[0121] In the above embodiments, both the water pump 6 and the compressor 1 are the main vibration sources of the chiller unit. By arranging the water pump 6 and the compressor 1 at intervals along the first direction X on the chassis 5, the vibration sources can be partitioned, reducing the possibility that the vibration generated by the compressor 1 can be directly transmitted to the water pump 6 and its related piping system. Furthermore, each area can adopt suitable vibration reduction structures and materials according to its specific vibration source characteristics. Moreover, the partitioning helps to avoid resonance problems caused by the close operating frequencies of the two.

[0122] Because the chiller unit has multiple vibration source components such as the refrigeration compressor 1 and the circulating water pump 6, the vibration source excitation is diverse. In addition to the characteristic line spectrum of the rotational frequency and its harmonic frequencies, it also contains a large number of broadband excitations generated by fluid impact. Based on this, this embodiment of the utility model performs modal simulation and transmission path contribution analysis on the whole machine and each component. The compressor 1 and the water pump 6 are arranged in vibration source zones. By performing dynamic design and modification of the structure, the transmission path is optimized, the broadband mechanical impedance is increased, and the mismatch between the dynamic characteristics of the structure and the characteristic excitation impedance of the line spectrum is made, thereby realizing the suppression of multi-source excitation coupling and broadband load vibration reduction.

[0123] In some embodiments, reference Figure 8 The chassis 5 includes a top plate 51, a bottom plate 52, and multiple first reinforcing plates 53.

[0124] The second saddle 4 is located on the top plate 51. The bottom plate 52 is arranged opposite to the top plate 51. A plurality of first reinforcing plates 53 are arranged between the top plate 51 and the bottom plate 52, and connect the top plate 51 and the bottom plate 52.

[0125] In the above embodiment, multiple first reinforcing plates 53 are provided between the top plate 51 and the bottom plate 52, which can enhance the rigidity of the chassis 5, making the entire chassis 5 more stable when bearing loads. The multiple first reinforcing plates 53 can more evenly distribute the vibration force on the chassis 5, changing the natural frequency of the chassis 5 and moving it away from the operating frequency range that may cause resonance, thus reducing the risk of damage due to resonance. Furthermore, the first reinforcing plates 53 can, to a certain extent, act as internal dampers, absorbing and dissipating the vibration energy generated by the compressor 1, water pump 6, etc., reducing vibration transmission.

[0126] In some embodiments, weight reduction holes may be provided on the first reinforcing plate 53, the bottom plate 52, and the top plate 51.

[0127] refer to Figure 1 and Figure 2 In some embodiments, there are two water pumps 6 connected in series, and the two water pumps 6 are spaced apart along the second direction Y of the chassis 5; the second direction Y is perpendicular to the first direction X. The second direction Y is consistent with the length direction of the first heat exchanger 2.

[0128] In the above embodiment, the two water pumps 6 are connected in series, and the total head of the system is equal to the sum of the heads of each pump. Therefore, two low-power water pumps 6 can be used to reduce the vibration of the water pumps 6. Furthermore, the two water pumps 6 are spaced apart along the second direction Y, which can make the vibration source distribution uniform.

[0129] In some embodiments, two water pumps 6 are arranged symmetrically.

[0130] refer to Figure 1 , Figure 2 and Figure 9 In some embodiments, the chiller unit also includes a mounting bracket 7 located on top of the chassis 5, and a water pump 6 is located on the mounting bracket 7. The rigidity of the mounting bracket 7 is substantially the same as that of the chassis 5.

[0131] In the above embodiment, the mounting frame 7 supports the water pump 6. The mounting frame 7 can absorb and isolate vibrations from the water pump 6, reducing vibrations directly transmitted to the chassis 5. Furthermore, by rationally arranging the support points on the mounting frame 7 according to the mass distribution and dynamic characteristics of the water pump 6, the load can be better distributed, reducing local stress concentration and thus lowering vibrations caused by unbalanced forces. The mounting frame 7 and the chassis 5 have similar stiffness characteristics, allowing the force on the water pump 6 to be distributed more evenly across the entire support structure. Moreover, by rationally matching the stiffness of the mounting frame 7 and the chassis 5, the natural frequency of the system can be adjusted, keeping it away from the operating frequency range that may cause resonance, thereby effectively reducing the potential hazards caused by resonance.

[0132] refer to Figure 9 In some embodiments, the mounting frame 7 includes multiple columns 71 connected to each other by a second reinforcing plate 72. The rigidity of the mounting frame 7 is similar to that of the chassis 5, and the high-rigidity water pump bracket is used to support and fix the water pump 6.

[0133] Optionally, the mounting frame 7 includes four columns 71, which are connected by a second reinforcing plate 72 to form a square mounting frame. The stiffness of the mounting frame 7 can be obtained by simulation calculation of its first-order modal value.

[0134] In some embodiments, the chiller unit further includes a chassis 5, a second saddle 4 disposed on the chassis 5, and the rigidity of the chassis 5 is substantially the same as that of the second saddle 4.

[0135] In the above embodiments, the chassis 5 and the second saddle 4, with similar stiffness, ensure a more even distribution of load between them, reducing the risk of local overload and facilitating the formation of a continuous and stable vibration transmission path. This allows vibrations generated from the compressor or other vibration sources to be transmitted more smoothly to the chassis. The consistency in stiffness between the chassis 5 and the second saddle 4 enhances the overall system rigidity, making the equipment more stable during operation.

[0136] In the above embodiment, the chassis 5 is the base of the unit, and other parts of the unit are mounted on the chassis 5.

[0137] The chassis 5 consists of a top plate 51, a bottom plate 52, and a first reinforcing plate 53 with intersecting horizontal and vertical sections. The middle section of the first reinforcing plate 53 can be hollowed out to achieve weight reduction. Simulation calculations can be used to determine whether the rigidity of the chassis 5 meets the requirements, thus achieving the goal of high rigidity.

[0138] In this embodiment of the invention, a rigid vibration-damping mass block is designed on the second saddle 4—the transmission path from the first heat exchanger 2 to the chassis 5. Through the abrupt change in the stiffness and mass of the second saddle 4 (generally, the thicker and stronger the component, the greater its stiffness; for example, the hollow square steel in the first saddle 3 has very low stiffness, while the thick steel block in the second saddle 4 has very high stiffness), a mismatch is generated between the impedance and the characteristic excitation of the compressor, forming a blocking frequency band on the transmission path and reflecting the incident wave energy of the vibration. To further effectively attenuate the vibration energy, a damping coating is applied to the vertical plate of the second saddle 4 to effectively absorb and dissipate the vibration reflection energy at the structural abrupt change.

[0139] This utility model embodiment utilizes the damping characteristics of rigid damping mass blocks to suppress the transmission of vibration waves. By constructing an impedance mismatch structure (impedance refers to stiffness divided by mass, and impedance mismatch refers to a large change in impedance), the vibration reduction of the first saddle 3 (medium-high frequency vibration isolation saddle) and the second saddle 4 (composite wave damping and vibration reduction saddle) is optimized.

[0140] refer to Figure 10 In some related technologies, a screw compressor includes a first rotor 13, a second rotor 18, and a motor drive shaft 15. The first rotor 13 and the second rotor 18 mesh, the motor drive shaft 15 is coaxially and directly connected to the first rotor 13, bearings are arranged at both ends of the first rotor 13 and the second rotor 18, and the drive shaft 15 is cantilevered with no additional support at the tail end. Figure 10 As shown in Figure a. Ideally, the first rotor 13 experiences uniform circumferential force, the drive shaft 15 does not become eccentric, and the air gap 1a between the stator 19 and the drive shaft 15 is uniform. However, in practical engineering, the first rotor 13 deflects under stress, and the drive shaft 15 has mass eccentricity. During dynamic rotation, the air gap 1a between the drive shaft 15 and the stator 19 becomes uneven, as shown in Figure a. Figure 10 As shown in b, this allows for the generation of more electromagnetic harmonic excitations. The electromagnetic excitation of the motor is coupled with the screw meshing excitation and gas excitation through the displacement coordination condition of the directly coupled rotor, resulting in vibration frequency and amplitude modulation. The excitation frequency components are complex and the amplitude is large.

[0141] Based on the aforementioned complex electromechanical coupling problem, this embodiment of the invention optimizes and improves the rotor system structure of the compressor by designing the first rotor 13 and the drive shaft 15 of the motor in segments, each equipped with front and rear bearings, and connected by a flexible coupling 17. Figure 11 As shown.

[0142] refer to Figure 11 In some embodiments, the compressor 1 includes a first rotor 13, a first bearing 14, a drive shaft 15, a second bearing 16, a coupling 17, and a second rotor 18.

[0143] The first bearing 14 is located at both ends of the first rotor 13. The second bearing 16 is located at both ends of the drive shaft 15. The coupling 17 connects one end of the first rotor 13 and one end of the drive shaft 15. The second rotor 18 meshes with the first rotor 13.

[0144] Optionally, the first rotor 13 is the male rotor of the compressor 1, and the second rotor 18 is the female rotor of the compressor 1. The drive shaft 15 is a motor drive shaft, or motor rotor. The motor also includes a stator 19, and there is an air gap 1a between the stator 19 and the drive shaft 15.

[0145] In the above embodiment, the flexural deformation of the first rotor 13 under stress can be compensated for by the displacement of the elastic coupling 17, which also has the function of longitudinal vibration isolation. Due to the constraint of the front and rear bearings, the drive shaft 15 has a small dynamic eccentricity, and the magnetic field in the air gap 1a is uniform. Through the optimal matching of the stiffness of the coupling 17 and the rotor system, the electromagnetic excitation is decoupled from the meshing excitation and gas excitation, while reducing the possibility of air gap unevenness caused by the eccentricity and misalignment of the first rotor 13. Simulation analysis shows that, compared to the case of a 30% rotor eccentricity, a uniform air gap results in fewer electromagnetic force wave frequency components and a smaller amplitude. The compressor provided in this embodiment of the invention employs mechanical-electromagnetic coupling vibration decoupling, which can reduce vibration by at least 5dB compared to similar equipment.

[0146] refer to Figure 1 In some embodiments, the chiller unit further includes a second heat exchanger 8. In the second direction Y, the second heat exchanger 8 is disposed between the two water pumps 6. In the first direction X, the second heat exchanger 8 is located between the first heat exchanger 2 and the water pumps 6.

[0147] In some embodiments, the second heat exchanger 8 is an evaporator. Optionally, the second heat exchanger 8 is a plate evaporator.

[0148] In some embodiments, the first heat exchanger 2 is a condenser. Optionally, the first heat exchanger 2 is a shell-and-tube condenser.

[0149] In some embodiments, the chiller unit includes a marine chiller unit.

[0150] In some embodiments, the chiller unit is configured to be installed on a ship.

[0151] The chiller unit provided in this embodiment of the invention can significantly reduce vibration and is suitable for environments requiring vibration resistance, such as ships or areas with frequent earthquakes.

[0152] The following is based on Figures 1 to 11 This section provides a detailed description of some specific implementations of the chiller unit.

[0153] In some embodiments, reference Figures 1 to 3 The chiller unit includes a compressor 1, a first heat exchanger 2, a first saddle 3, a second saddle 4, a chassis 5, a water pump 6, a mounting bracket 7, and a second heat exchanger 8.

[0154] The compressor 1, the first heat exchanger 2, the first saddle 3, the second saddle 4, the water pump 6, the mounting bracket 7, and the second heat exchanger 8 are all mounted on the chassis 5.

[0155] The bearing surface of chassis 5 is a plane, extending along the first direction X and the second direction Y. The third direction Z is the height direction. The first direction X is perpendicular to the second direction Y, the second direction Y is perpendicular to the third direction Z, and the first direction X is perpendicular to the third direction Z.

[0156] A second saddle 4 is provided on the bearing surface of the chassis 5, and the second saddle 4 supports and connects to the first heat exchanger 2 located on top of it. Optionally, the first heat exchanger 2 is a shell-and-tube condenser. The length direction of the first heat exchanger 2 is consistent with the second direction Y, and two second saddles 4 are provided at intervals at the bottom of the first heat exchanger 2. The two second saddles 4 are provided at intervals along the second direction Y, and the second heat exchanger 8 is supported by the two second saddles 4.

[0157] Optionally, there are two compressors 1. Two first saddles 3 are provided at intervals along the second direction Y on the top of the first heat exchanger 2, and each first saddle 3 supports and connects to a compressor 1.

[0158] The water pump 6 and the first heat exchanger 2 are spaced apart in the first direction X. There are two water pumps 6, which are spaced apart in the second direction Y. Each water pump 6 is equipped with a mounting bracket 7, which is mounted on the chassis 5, and the water pump 6 is fixedly mounted on the mounting bracket 7.

[0159] In the first direction X, the second heat exchanger 8 is located between the water pump 6 and the first heat exchanger 2; in the second direction Y, the second heat exchanger 8 is located between the two water pumps 6. Optionally, the second heat exchanger 8 is a plate evaporator.

[0160] refer to Figure 4The compressor 1 also includes a foot 11 and a body 12, with the body 12 and the foot 11 integrally formed. The foot 11 is used to support the entire compressor 1. The rigidity of the foot 11 is greater than that of the first saddle 3, and the rigidity of the second saddle 4 is greater than that of the first saddle 3.

[0161] refer to Figure 5 The first saddle 3 includes two first connecting members 31 and a support member 32. The two first connecting members 31 are spaced apart along a second direction Y. The bottom of each first connecting member 31 is constructed as an arc-shaped connecting surface, the curvature of which matches the shape of the outer contour of the top of the first heat exchanger 2, facilitating a close connection between the two first connecting members 31 and the top of the first heat exchanger 2. The support member 32 is located on top of the two first connecting members 31 and is constructed as a hollow structure. The top of the support member 32 is supported and connected to the foot 11 of the compressor 1. Optionally, a weight-reducing hole may be provided at the bottom of the support member 32.

[0162] refer to Figure 7 The second saddle 4 includes a second connector 41, a bracket 42, and a mass block 43. The second connector 41 is arc-shaped, and its curvature matches the outer contour of the top of the first heat exchanger 2, facilitating a close connection between the second connector 41 and the bottom of the first heat exchanger 2. The bracket 42 is located at the bottom of the second connector 41. The bracket 42 includes a base plate 421 and two opposing support plates 422, which are spaced apart along a second direction Y and are respectively connected to the base plate 421 and the second connector 41. The mass block 43 is a solid structure and connects the two support plates 422. There are two mass blocks 43, which are spaced apart along a first direction X.

[0163] refer to Figure 8 The chassis 5 includes a top plate 51, a bottom plate 52, and a plurality of first reinforcing plates 53. The top plate 51 is a load-bearing surface. The bottom plate 52 is disposed opposite to the top plate 51. The plurality of first reinforcing plates 53 are disposed between the top plate 51 and the bottom plate 52 and connect the top plate 51 and the bottom plate 52.

[0164] refer to Figure 9 The mounting frame 7 includes four uprights 71, which are connected by multiple second reinforcing plates 72 to form a square mounting frame 7.

[0165] Some embodiments of this utility model also provide an air conditioning system, which includes an air conditioner and a chiller unit as described in any of the above embodiments, wherein the chiller unit is configured to provide a cooling source for the air conditioner.

[0166] Chillers are also used to provide cooling for cold storage facilities and other equipment that requires cooling.

[0167] In some embodiments, the chiller unit includes a refrigeration system and a chilled water system. The chiller unit is of modular construction, with the refrigeration system and chilled water system arranged side-by-side on an integrated chassis 5. The refrigeration system includes two fully enclosed screw compressors, a shell-and-tube condenser, a plate evaporator, a throttling mechanism, an electrical control box, and piping accessories. The chilled water system includes two chilled water pumps, piping, flexible joints, and valves.

[0168] In the above embodiments, the air conditioning system includes a marine air conditioning system.

[0169] In some embodiments, the air conditioning system is configured to be installed on a ship. Because ships have high comfort requirements, the vibration values ​​of chillers in related technologies do not meet the vibration index requirements for ships.

[0170] Based on this, in this embodiment of the invention, the compressor 1, acting as the vibration source, is placed at the top, and the vibration from the source is transmitted to the chassis 5 at the bottom through the structural components below. The design of the transmission path structural components reduces vibration during transmission. Furthermore, through optimized design, such as using vibration-damping materials, improving the internal structural layout, and adjusting the compressor's operating mode, the vibration level of the chiller unit itself can be significantly reduced, thereby improving the stability and reliability of the entire system. In addition, low-vibration chiller units also help extend the service life of the equipment, reduce maintenance costs, and are of great significance for improving the overall performance of the ship.

[0171] Based on the descriptions of the above embodiments, the chiller unit provided by this utility model, when applied to a ship, has the following beneficial effects:

[0172] Improved comfort: Low-vibration chiller units can significantly reduce vibration levels during operation, minimizing disruption to the crew's living and working environment and improving crew comfort.

[0173] Enhanced equipment stability: Optimized design reduces vibration, which helps improve the stability of the chiller unit and its connected equipment, reduces failures caused by vibration, and ensures long-term stable operation of the equipment.

[0174] Noise Reduction: The low-vibration design helps reduce operating noise, creating a quieter working and living environment, which is beneficial to the mental health of the crew.

[0175] Extending equipment lifespan: Reducing vibration can slow down the wear rate of equipment, extend its service life, reduce maintenance costs, and improve economic efficiency.

[0176] Improved overall performance: Low-vibration chillers not only improve the performance of the refrigeration system, but also enhance the overall performance of the entire ship system, thereby increasing the ship's market competitiveness.

[0177] The air conditioning system provided in this embodiment can significantly reduce vibration and is suitable for environments requiring vibration resistance, such as ships or areas with frequent earthquakes.

[0178] Based on the above embodiments of the present invention, in the absence of explicit denial or conflict, the technical features of one embodiment can be advantageously combined with one or more other embodiments.

[0179] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A water chiller, characterized by, include: The compressor (1) includes a foot (11) located at the bottom; The first heat exchanger (2) is located below the compressor (1); The first saddle (3) is located on the top of the first heat exchanger (2) and is supported and connected to the machine foot (11); as well as The second saddle (4) is located at the bottom of the first heat exchanger (2) and is supported and connected to the first heat exchanger (2); The stiffness of the machine foot (11) is different from that of the first saddle (3), and the stiffness of the second saddle (4) is different from that of the first saddle (3).

2. The water chiller of claim 1, wherein The stiffness of the machine foot (11) is greater than that of the first saddle (3), and the stiffness of the second saddle (4) is greater than that of the first saddle (3).

3. The water chiller of claim 1, wherein The compressor (1) also includes a body (12), which is integrally formed with the machine feet (11).

4. The water chiller of claim 1, wherein The first saddle (3) includes: A first connector (31) is connected to the top of the first heat exchanger (2); and A support member (32) is disposed on the top of the first connector (31) and is supported and connected to the machine foot (11). The support member (32) is constructed as a hollow structure.

5. The water chiller of claim 4, wherein The support member (32) includes two hollow support beams (321) spaced apart, and the length extension direction of the support beams (321) is consistent with the length extension direction of the compressor (1).

6. The water chiller of claim 1, wherein The second saddle (4) includes: The second connector (41) is connected to the bottom of the first heat exchanger (2); A bracket (42) is disposed at the bottom of the second connector (41); and A mass block (43) is provided on the support (42), and the mass block (43) is constructed as a solid structure.

7. The water chiller of claim 6, wherein The support (42) includes: Base plate (421); and Two support plates (422) are arranged opposite to each other, and each of the two support plates (422) is respectively connected to the base plate (421) and the second connecting member (41); The mass block (43) is connected to the two support plates (422).

8. The water chiller of claim 7, wherein The surfaces of the two support plates (422) are coated with damping paint.

9. The water chiller of claim 1, wherein Also includes: The chassis (5) and the compressor (1) are located on top of the chassis (5); as well as A water pump (6) is located on the top of the chassis (5) and is spaced apart from the compressor (1) along a first direction (X).

10. The water chiller of claim 9, wherein, The number of water pumps (6) is two, the two water pumps (6) are connected in series, and the two water pumps (6) are spaced apart along the second direction (Y) of the chassis (5); the second direction (Y) is perpendicular to the first direction (X).

11. The water chiller of claim 9, wherein It also includes a mounting bracket (7) located on the top of the chassis (5), the water pump (6) is located on the mounting bracket (7), and the rigidity of the mounting bracket (7) is the same as that of the chassis (5).

12. The water chiller of claim 1, wherein It also includes a chassis (5), the second saddle (4) is disposed on the chassis (5), and the rigidity of the chassis (5) is the same as that of the second saddle (4).

13. The water chiller of claim 12, wherein, The chassis (5) includes: Top plate (51), the second saddle (4) is disposed on the top plate (51); A base plate (52) is disposed opposite to the top plate (51); and Multiple first reinforcing plates (53) are disposed between the top plate (51) and the bottom plate (52) and connect the top plate (51) and the bottom plate (52).

14. The water chiller of claim 1, wherein The compressor (1) also includes: First rotor (13); The first bearing (14) is located at both ends of the first rotor (13); Drive shaft (15); The second bearing (16) is located at both ends of the drive shaft (15); A coupling (17) connects one end of the first rotor (13) and one end of the drive shaft (15); and The second rotor (18) meshes with the first rotor (13).

15. The water chiller of claim 1, wherein The chiller unit is configured to be installed on a ship.

16. An air conditioning system characterized by, Includes an air conditioner and a chiller unit according to any one of claims 1 to 15, wherein the chiller unit is configured to provide a cooling source for the air conditioner.

Images