Double-cold-source evaporator, and air conditioning unit

Abstract

The present application relates to the technical field of refrigeration. Provided are a double-cold-source evaporator, and an air conditioning unit. The double-cold-source evaporator comprises: a first cold source circuit, which carries a first cold source; and a second cold source circuit, which carries a second cold source, wherein the first cold source circuit comprises a first cold source coil, the second cold source circuit comprises a second cold source coil, and the first cold source coil and the second cold source coil jointly form an evaporator coil. The double-cold-source evaporator can choose, on the basis of specific working conditions and needs, an operation mode in which the first cold source circuit operates, an operation mode in which the second cold source circuit operates, or an operation mode in which the first cold source circuit and the second cold source circuit operate simultaneously, so as to meet different refrigeration requirements, thereby achieving an improved energy saving effect and heat transfer efficiency. The air conditioning unit comprises the double-cold-source evaporator, and compared with air conditioning units in the prior art, has no compressor and no complex compressor line, so that the air conditioning unit has reduced energy consumption. Furthermore, the wind-side resistance of the air conditioning unit is greatly reduced, and accordingly the fan power consumption is also reduced.

Description

Dual cooling source evaporator and air conditioning unit

[0001] This application claims priority to a Chinese patent application filed with the Patent Office of China on December 15, 2023, entitled “Dual-Cold Source Evaporator and Air-Conditioning Unit”. The application number of the prior application is 202311740066.X, and all of its contents are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of refrigeration technology, and in particular to a dual-cold source evaporator and an air-conditioning unit. Background Art

[0003] Due to the contemporary demands for energy conservation, emission reduction and green environmental protection, higher demands have been placed on the energy consumption and cooling capacity of the refrigeration industry. Energy conservation and the reliability and stability of the refrigeration system operation have become the primary demands of users.

[0004] In the process of implementing this application, the applicant discovered that the prior art has at least the following problems:

[0005] The air-conditioning unit has a single operating mode and cannot meet the operating requirements of various situations in the equipment room. Usually, the equipment room in the computer room uses terminal chilled water or air-cooled compressors for operation, or adopts outdoor water cooling and indoor air cooling operation mode. This single operating mode cannot be flexibly switched according to actual cooling needs, and thus cannot achieve efficient energy saving. Summary of the Invention

[0006] The purpose of the present application is to provide a high-efficiency and energy-saving dual-cold-source evaporator and an air-conditioning unit equipped with the evaporator.

[0007] To achieve the above objectives, the technical solutions of this application are as follows:

[0008] A dual-cold source evaporator includes a first cold source circuit carrying a first cold source and a second cold source circuit carrying a second cold source, wherein the first cold source circuit includes a first cold source coil and the second cold source circuit includes a second cold source coil;

[0009] The first cold source coil and the second cold source coil together form an evaporator coil.

[0010] Furthermore, the first cold source circuit is a chilled water circuit, the first cold source coil is a chilled water coil, and / or,

[0011] The second cold source circuit is a refrigerant circuit, and the second cold source coil is a refrigerant coil.

[0012] Furthermore, the first cold source circuit includes one chilled water circuit, and the second cold source circuit includes a plurality of refrigerant circuits.

[0013] Furthermore, the first cooling source coil and the second cooling source coil share a set of evaporating fans; and / or,

[0014] The first cooling source coil and the second cooling source coil share a set of fin groups.

[0015] Furthermore, the first cold source coil includes a plurality of first cold source sub-coils arranged along the height direction of the evaporator, and the second cold source coil includes a plurality of second cold source sub-coils arranged along the height direction of the evaporator; each of the first cold source sub-coil and one of the second cold source sub-coils are arranged along the thickness direction of the evaporator.

[0016] Furthermore, each of the first cooling source sub-coil and the corresponding second cooling source sub-coil form a group;

[0017] Each of the first cold source sub-coil tubes includes multiple rows of first pipes, and each of the second cold source sub-coil tubes includes multiple rows of second pipes. The multiple rows of first pipes and the multiple rows of second pipes are arranged alternately along the thickness direction of the evaporator.

[0018] Furthermore, the first cold source circuit further includes an electric valve and a first cold source pipeline connected between the electric valve and the first cold source coil, and the opening and closing of the electric valve is used to control the circulation of the first cold source in the first cold source circuit;

[0019] A first pressure sensor and a first temperature sensor are provided on the first cold source pipeline, and the first pressure sensor and the first temperature sensor are used to detect the pressure and temperature of the first cold source respectively.

[0020] Furthermore, the evaporator includes two cores connected at one end and open at the other end, and the evaporator coil is arranged in each core.

[0021] On the other hand, the present application further provides an air-conditioning unit, comprising the dual-cold-source evaporator according to any one of the above embodiments, wherein:

[0022] The second cold source circuit also includes a condensing component connected to the cold source coil; the condensing component includes a condenser, a fluorine pump and a second cold source pipeline, and the second cold source pipeline connects the condenser, the fluorine pump and the second cold source coil to allow the second cold source to circulate.

[0023] Furthermore, the air-conditioning unit includes an indoor unit and an outdoor unit; the indoor unit includes a plurality of indoor unit units, each of which has an indoor air duct formed therein, and the evaporator is arranged in the indoor air duct; the outdoor unit is equipped with the condensing assembly, and the condensing assembly further includes a condensing fan arranged corresponding to the condenser and a liquid reservoir arranged between the condenser and the fluorine pump; and / or,

[0024] The second cold source pipeline is also provided with a fluorine injection nozzle, a second pressure sensor and a second temperature sensor. The fluorine injection nozzle is used to inject the second cold source into the second cold source coil, and the second pressure sensor and the second temperature sensor are used to detect the pressure and temperature of the second cold source respectively.

[0025] On the one hand, the present application provides a dual-cold source evaporator, including: an evaporator end plate, a fin group and an evaporator coil, the evaporator end plates are respectively arranged at both ends of the fin group, and the evaporator coil is arranged on the fin group; the evaporator coil includes a first cold source coil and a second cold source coil, the first cold source coil is located on a first cold source circuit carrying a first cold source, and the second cold source coil is located on a second cold source circuit carrying a second cold source.

[0026] Furthermore, the fin group includes a plurality of fins that are spaced apart and arranged in parallel with each other, and the fin group is tightly matched with the evaporator coil; the height and width of the fin group respectively match the height and width of the evaporator.

[0027] Furthermore, the fins and the evaporator end plate are provided with multiple rows of through holes, and multiple pipes are respectively inserted into the through holes of the fins and the evaporator end plate and fixed, and the evaporator end plate is connected to adjacent pipes by a U-shaped elbow.

[0028] Furthermore, the first cold source coil includes a plurality of first cold source sub-coils arranged along the height direction of the evaporator, and the second cold source coil includes a plurality of second cold source sub-coils arranged along the height direction of the evaporator, and each of the first cold source sub-coils and one of the second cold source sub-coils are arranged along the thickness direction of the evaporator.

[0029] Furthermore, each first cold source sub-coil and the corresponding second cold source sub-coil form a group, each first cold source sub-coil includes multiple rows of first pipes, and each second cold source sub-coil includes multiple rows of second pipes, and the multiple rows of first pipes and the multiple rows of second pipes are arranged in an interlaced manner along the thickness direction of the evaporator.

[0030] Furthermore, the fin group and the evaporator end plate are respectively provided with a first group of through holes for the first pipe to pass through and a second group of through holes for the second pipe to pass through in the thickness direction of the evaporator, and the first group of through holes and the second group of through holes are arranged at intervals in the thickness direction of the evaporator.

[0031] Furthermore, the first pipe of each first cold source sub-coil is respectively inserted into the corresponding first group of through holes to form the first cold source coil; the second pipe of each second cold source sub-coil is respectively inserted into the corresponding second group of through holes to form the second cold source coil.

[0032] Furthermore, the first cold source circuit is a chilled water circuit, the first cold source coil is a chilled water coil, and / or the second cold source circuit is a refrigerant circuit, the second cold source coil is a refrigerant coil.

[0033] On the other hand, the present application also provides an air-conditioning unit, including an indoor unit and an outdoor unit; the indoor unit includes several indoor unit units, each of which has an indoor air duct formed inside, and the indoor air duct is provided with a dual-cold source evaporator as described above.

[0034] Furthermore, the first cold source circuit further includes an electric valve and a first cold source pipeline connected between the electric valve and the first cold source coil, the opening and closing of the electric valve is used to control the circulation of the first cold source in the first cold source circuit; a first pressure sensor and a first temperature sensor are respectively provided on the first cold source pipeline, the first pressure sensor is used to detect the pressure of the first cold source, and the first temperature sensor is used to detect the temperature of the first cold source, so as to control the flow rate of the first cold source in the first cold source coil;

[0035] The second cold source circuit also includes a condensing component connected to the second cold source coil, the condensing component includes a condenser, a fluorine pump and a second cold source pipeline, the second cold source pipeline connects the condenser, the fluorine pump and the second cold source coil to allow the second cold source to circulate; a second pressure sensor and a second temperature sensor are respectively provided on the second cold source pipeline, the second pressure sensor is used to detect the pressure of the second cold source, and the second temperature sensor is used to detect the temperature of the second cold source to control the flow of the second cold source in the second cold source coil.

[0036] Compared with the existing technology, the dual-cold source evaporator provided by this application has at least the following technical effects:

[0037] Through a first cold source circuit carrying a first cold source and a second cold source circuit carrying a second cold source, the first cold source circuit includes a first cold source coil, and the second cold source circuit includes a second cold source coil; the first cold source coil and the second cold source coil together form an evaporator coil. The dual-cold source evaporator can choose to use one of the first cold source circuit and the second cold source circuit, or both working at the same time according to specific working conditions and needs to meet different refrigeration requirements, thereby achieving better energy saving effects and heat transfer efficiency.

[0038] In the above-mentioned embodiments, the air conditioning unit and the corresponding dual-cold source evaporator embodiment can have the same technical effects, which will not be repeated here. In addition, in the air conditioning unit, the first cold source circuit can independently control the circulation of the first cold source within the first cold source circuit, and the second cold source circuit uses a fluorine pump as a power source. The heat of the evaporator is discharged to the outside of the air conditioning unit through the first cold source circuit / the second cold source circuit. Compared with the air conditioning unit in the prior art, the compressor and the complex compressor piping are eliminated, thereby reducing the energy consumption of the air conditioning unit. Furthermore, due to the elimination of the compressor and the complex compressor piping, the wind-side resistance of the air conditioning unit is greatly reduced, and the power consumption of the fan is also reduced accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic diagram of the principle structure of an evaporator coil in one embodiment;

[0040] FIG2 is a schematic diagram of the principle structure of a first cold source circuit in one embodiment;

[0041] FIG3 is a schematic diagram of the principle structure of the second cold source circuit in one embodiment;

[0042] FIG4 is a front view of an evaporator in one embodiment;

[0043] FIG5 is a flow diagram of the first cold source coil on the evaporator in one embodiment;

[0044] FIG6 is a flow diagram of the second cold source coil on the evaporator in one embodiment;

[0045] FIG7 is a schematic structural diagram of an evaporator in another embodiment;

[0046] FIG8 is a schematic structural diagram of an air conditioning unit in one embodiment;

[0047] FIG9 is a front view of FIG8;

[0048] FIG10 is a side view of FIG8;

[0049] FIG11 is a bottom view of FIG8;

[0050] FIG12 is a schematic structural diagram of an outdoor unit in one embodiment;

[0051] FIG13 is a front view of FIG12;

[0052] FIG14 is a top view of FIG12 .

[0053] Description of Figure Numbers:

[0054] 10. First cooling source circuit; 11. First cooling source coil; 111. First cooling source sub-coil; 12. Electric valve; 131. First cooling source liquid inlet pipe; 132. First cooling source liquid return pipe; 14. First temperature sensor; 15. First pressure sensor; 20. Second cooling source circuit; 21. Second cooling source coil; 211. Second cooling source sub-coil; 22. Condenser; 23. Fluorine pump; 241. Second cooling source liquid inlet pipe; 2411. Dry filter; 2412. Electronic expansion valve; 242. Second cooling source liquid return pipe; 25. Fluorine injection nozzle; 26. Second pressure sensor; 261. Low pressure sensor; 262. High pressure sensor; 27. Second cooling source circuit; Temperature sensor; 28. Ball valve; 30. Evaporating fan; 40. Fin group; 50. Evaporator; 51. Evaporator coil; 521. First core; 522. Second core; 523. Connector; 53. Evaporator end plate; 54. Fin; 541. First group of through holes; 5411. First group of through holes in one row; 5412. First group of through holes in two rows; 5413. First group of through holes in three rows; 542. Second group of through holes; 5421. Second group of through holes in one row; 5422. Second group of through holes in two rows; 5423. Second group of through holes in three rows; 60. Indoor unit; 61. Indoor unit unit; 70. Outdoor unit; 71. Condensing fan; 72. Liquid reservoir. DETAILED DESCRIPTION

[0055] The technical solution of the present application is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. In the following description, reference is made to "some embodiments", which describes a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0056] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0057] Please refer to Figures 1-3. An embodiment of the present application provides a dual-cold source evaporator, including a first cold source circuit 10 carrying a first cold source and a second cold source circuit 20 carrying a second cold source. The first cold source circuit 10 includes a first cold source coil 11, and the second cold source circuit 20 includes a second cold source coil 21; the first cold source coil 11 and the second cold source coil 21 together form an evaporator coil 51. Specifically, please refer to Figures 4-6. The evaporator 50 includes an evaporator end plate 53, a fin group 40 and an evaporator coil 51. The evaporator end plates 53 are respectively arranged at both ends of the fin group 40. The evaporator coil 51 includes a first cold source coil 11 and a second cold source coil 21. The first cold source coil 11 and the second cold source coil 21 are both connected by multiple pipes. The fin group 40 includes multiple fins 54. The fins 54 and the evaporator end plate 53 are provided with multiple rows of through holes. Multiple pipes are respectively inserted into the through holes of the fin group 40 and the evaporator end plate 53 for fixation, and a U-shaped elbow is used on the evaporator end plate 53 to connect adjacent pipes to guide the cold source to flow from the inlet to the outlet to form a circulation loop; wherein, the fins 54 are used to enhance the heat exchange between the coil and the air, and the evaporator end plate 53 is used to support and fix. The first heat sink coil 11 and the second heat sink coil 21 are typically made of metal flat tubes or round tubes, specifically copper, aluminum, or stainless steel, which have excellent thermal conductivity and corrosion resistance. The choice of flat tube or round tube depends on the specific application and design requirements. Flat tubes generally provide a larger heat exchange area, while round tubes offer better fluid flow performance.

[0058] In this embodiment, a first cold source circuit 10 carrying a first cold source and a second cold source circuit 20 carrying a second cold source are provided. The first cold source circuit 10 includes a first cold source coil 11, and the second cold source circuit 20 includes a second cold source coil 21. The first cold source coil 11 and the second cold source coil 21 together form an evaporator coil 51. The dual-cold source evaporator can, according to specific working conditions and needs, choose to use the first cold source circuit 10, the second cold source circuit 20, or the two working simultaneously to meet different refrigeration requirements, thereby achieving better energy saving effects and heat transfer efficiency.

[0059] In an optional embodiment, the first cold source circuit 10 is a chilled water circuit, the first cold source coil 11 is a chilled water coil, and / or the second cold source circuit 20 is a refrigerant circuit, and the second cold source coil 21 is a refrigerant coil. The chilled water circuit is a piping system for circulating chilled water, connected to the chilled water coil, and transports the chilled water to the chilled water coil. Chilled water is typically provided by chilled water equipment, such as a chiller or cooling tower. Chilled water has a high specific heat capacity and thermal conductivity, allowing it to better absorb and transfer heat, thereby achieving efficient heat dissipation. The refrigerant circuit is a piping system for circulating refrigerant, connected to the refrigerant coil, and transporting the refrigerant to the refrigerant coil. Refrigerant is a substance that easily absorbs heat to form a gas and easily releases heat to form a liquid. It can absorb and release large amounts of heat at relatively low temperatures, thereby achieving efficient energy conservation. The refrigerant in this embodiment can be Freon, which is a type of synthetic fluorocarbon compound, common ones include R22 (chlorodifluoromethane) and R134a (1,1,1,2-tetrafluoroethane), which have good refrigeration performance and chemical stability. It should be further explained that the chilled water coil and the refrigerant coil can be used simultaneously or independently, and can be flexibly adjusted and controlled according to specific needs and operating conditions to achieve better energy saving and heat transfer efficiency. For example, when the outside temperature is low, such as in winter, only the refrigerant coil can be used, taking advantage of the refrigerant's ability to absorb and release a large amount of heat at low temperatures. On the one hand, it reduces the energy consumption of the chilled water and achieves energy saving effects, and on the other hand, it prevents the pipeline from freezing and cracking. When the outside temperature is high, the chilled water coil and the refrigerant coil can be used at the same time, the heat exchange area is increased, the chilled water coil absorbs heat through the circulating chilled water, and the refrigerant coil uses the cooling effect of the refrigerant to further reduce the temperature. When the outside temperature is higher than the indoor return air temperature, only the chilled water coil can be used to meet the cooling needs. The synergistic effect of the chilled water coil and the refrigerant coil can better absorb and transfer heat, improving cooling efficiency. This embodiment integrates the chilled water coil and the refrigerant coil, allowing the use of either the chilled water coil, the refrigerant coil, or both simultaneously, depending on specific operating conditions and needs, to meet different cooling requirements, thereby achieving better energy savings and heat transfer efficiency.

[0060] In an optional embodiment, the first cold source circuit 10 includes a chilled water circuit, and the second cold source circuit 20 includes multiple refrigerant circuits. Different refrigerant circuits can operate independently or simultaneously, so that the evaporator 50 can better match and adjust the refrigeration requirements of different applications. Specifically, the number of refrigerant circuits to be used can be selected according to the refrigeration requirements. For example, when the refrigeration demand is not high, only part of the refrigerant circuits can be used to reduce energy consumption and operating costs. In a specific example, as shown in Figure 1, the refrigerant circuit includes two. In addition, setting up multiple refrigerant circuits can improve the fault tolerance performance of the evaporator 50, that is, if one refrigerant circuit fails, the other refrigerant circuits can still continue to provide refrigeration capacity to maintain the normal operation of the evaporator 50. This embodiment can provide greater flexibility and adjustment capabilities by setting up multiple refrigerant circuits to meet different refrigeration needs.

[0061] In an optional embodiment, the first cold source coil 11 and the second cold source coil 21 share a set of evaporating fans 30. The evaporating fans 30 are used to introduce the hot return air from the room into the evaporator 50, and come into contact with the surfaces of the first cold source coil 11 and the second cold source coil 21. The first cold source in the first cold source coil 11 and / or the second cold source in the second cold source coil 21 absorb heat from the hot air, converting it into cold air and returning it to the room. By continuously operating, the evaporating fans 30 enable the first cold source in the first cold source coil 11 and / or the second cold source in the second cold source coil 21 to continuously absorb heat and deliver cold air to the space that needs to be cooled. In this embodiment, by having the first cold source coil 11 and the second cold source coil 21 share a set of evaporating fans 30, the number of components can be reduced and space can be saved.

[0062] Referring to Figure 4 , in an optional embodiment, the first cooling coil 11 and the second cooling coil 21 share a common fin assembly 40. This fin assembly 40 comprises a plurality of spaced-apart, parallel fins 54 (not shown). For example, aluminum foil fins with a thickness of approximately 0.1 mm and a spacing of approximately 1.5 mm between fins can be used. The fin assembly 40 and the evaporator coil 51 fit tightly together, preventing relative displacement. The height of the fin assembly 40 matches the height of the evaporator 50, and the width of the fin assembly 40 matches the width of the evaporator 50.

[0063] Referring to Figures 5 and 6 , in an optional embodiment, the first cooling coil 11 includes a plurality of first cooling sub-coils 111 arranged along the height of the evaporator 50, and the second cooling coil 21 includes a plurality of second cooling sub-coils 211 arranged along the height of the evaporator 50. Each first cooling sub-coil 111 and each second cooling sub-coil 211 are arranged along the thickness of the evaporator 50. It should be further explained that the first cooling circuit 10 includes a first cooling inlet pipe 131 and a first cooling return pipe 132. The first cooling inlet pipe 131 transports the first cooling source to the first cooling sub-coil 111. The first cooling source flows through the first cooling sub-coil 111 and then returns to the first cooling return pipe 132. Similarly, the second cold source circuit 20 includes a second cold source inlet pipe 241 and a second cold source return pipe 242. The second cold source inlet pipe 241 transports the second cold source to the second cold source sub-coil 211. After flowing through the second cold source sub-coil 211, the second cold source returns to the second cold source return pipe 242. The first cold source sub-coil 111 and the second cold source sub-coil 211 can be arranged in various ways, including a parallel arrangement or a staggered arrangement. Specifically, in a parallel arrangement, the first cold source sub-coil 111 and the second cold source sub-coil 211 are arranged parallel to the fin assembly 40 and the evaporator support plate 53, respectively. In a staggered arrangement, the first cold source sub-coil 111 and the second cold source sub-coil 211 are staggered on the fin assembly 40 and the evaporator support plate 53, resulting in a more complex flow path, a larger contact area between the cold source and the air, and higher heat exchange efficiency.

[0064] In an optional embodiment, each first cold source sub-coil 111 and the corresponding second cold source sub-coil 211 form a group, each first cold source sub-coil 111 includes multiple rows of first pipes, and each second cold source sub-coil 211 includes multiple rows of second pipes, and the multiple rows of first pipes and the second pipes are arranged in an interlaced manner along the thickness direction of the evaporator 50.

[0065] In an optional embodiment, the fin assembly 40 and the evaporator end plate 54 are each provided with two groups of through holes along the thickness direction of the evaporator 50: a first group of through holes 541 for the first pipe to pass through, and a second group of through holes 542 for the second pipe to pass through. In this embodiment, the first group of through holes 541 and the second group of through holes 542 are arranged at intervals along the thickness direction of the evaporator. For example, if six rows of through holes are provided along the thickness direction of the evaporator, the first, third, and fifth rows of through holes constitute the first group of through holes 541; the second, fourth, and sixth rows of through holes constitute the second group of through holes 542.

[0066] The first pipe of each first cold source sub-coil 111 is respectively inserted into the corresponding first group of through holes 541 to form a first cold source coil 11 consisting of multiple first cold source sub-coils 111 distributed along the height of the evaporator; the second pipe of each second cold source sub-coil 211 is respectively inserted into the corresponding second group of through holes 542 to form a second cold source coil 21 consisting of multiple second cold source sub-coils 211 distributed along the height of the evaporator.

[0067] In a specific embodiment, the first group of through holes 541 includes a first group of one row of through holes 5411, a first group of two rows of through holes 5412 and a first group of three rows of through holes 5413, and the second group of through holes 542 includes a second group of one row of through holes 5421, a second group of two rows of through holes 5422 and a second group of three rows of through holes 5423. Accordingly, each first cold source sub-coil 111 includes a first row of first pipes, a second row of first pipes and a third row of first pipes, and each second cold source sub-coil 211 includes a first row of second pipes, a second row of second pipes and a third row of second pipes. The first group of one row of through holes 5411, the second group of one row of through holes 5421, the first group of two rows of through holes 5412, the second group of two rows of through holes 5422, the first group of three rows of through holes 5413 and the second group of three rows of through holes 5423 are arranged in sequence in the thickness direction of the evaporator 50, and the height of each second cold source sub-coil 211 in the second group of through holes 542 is higher than the height of the first cold source sub-coil 111 in the first group of through holes 541, so as to realize the mutually staggered arrangement of the first cold source sub-coil 111 and the second cold source sub-coil 211. The first cold source sub-coil 111 corresponds to the first group of through holes 541, firstly, it meanders along the first group of through holes 5411 to a certain height to form the first row of first pipes, then crosses the second group of through holes 5421, then meanders along the first group of through holes 5412 in the opposite direction to form the second row of first pipes, then crosses the second group of through holes 5422, then meanders along the first group of through holes 5413 to form the third row of first pipes; the second cold source sub-coil 211 corresponds to the second group of through holes 54 2, after first winding along the second group of single-row through holes 5421 to a certain height to form the first row of second pipes, then crossing the first group of double-row through holes 5412 and winding along the second group of double-row through holes 5422 in the opposite direction to form the second row of second pipes, then crossing the first group of triple-row through holes 5413 and winding along the second group of triple-row through holes 5423 to form the third row of second pipes. The first heat sink sub-coil 111 and the second heat sink sub-coil 211 are arranged in this staggered manner to form a group. It should be noted that the bending configuration of the first heat sink sub-coil 111 and the second heat sink sub-coil 211 is not limited to the specific configuration described in the above embodiment. The bending configuration of the first heat sink sub-coil 111 and the second heat sink sub-coil 211 can increase the flow path length of the two types of heat sinks in the corresponding pipes and maintain cooling uniformity when the two types of heat sinks are working together. Adjacent groups of first heat sink sub-coils 111 and second heat sink sub-coils 211 are symmetrically distributed along the height direction of the evaporator 50.

[0068] Referring again to Figures 1-3 , in an optional embodiment, the first cooling source circuit 10 further includes an electric valve 12 and a first cooling source pipeline connected between the electric valve 12 and the first cooling source coil 11. The opening and closing of the electric valve 12 controls the circulation of the first cooling source within the first cooling source circuit 10. A first pressure sensor 15 and a first temperature sensor 14 are provided on the first cooling source pipeline, respectively detecting the pressure and temperature of the first cooling source. The first cooling source pipeline includes a first cooling source inlet pipe 131 and a first cooling source return pipe 132. The electric valve 12 is provided on the first cooling source return pipe 132 to control the circulation of the first cooling source within the first cooling source coil 11. The electric valve 12 can be a two-way valve. The first cooling source inlet pipe 131 and the first cooling source return pipe 132 are both provided with the first pressure sensor 15 and the first temperature sensor 14. The first pressure sensor 15 and the first temperature sensor 14 are used to detect the pressure and temperature of the first cold source in the first cold source liquid inlet pipe 131 and the first cold source liquid return pipe 132. By detecting changes in pressure and temperature, the pressure and temperature state of the first cold source in the first cold source coil 11 can be determined, thereby controlling and adjusting the flow rate of the first cold source in the first cold source coil 11.

[0069] Referring to FIG. 7 , in an optional embodiment, the evaporator 50 includes two cores connected at one end and open at the other end, each of which is provided with the evaporator coil 51. Specifically, the evaporator 50 includes a first core 521, a second core 522, and a connector 523. One end of the first core 521 is connected to one end of the second core 522 via the connector 523. The ends of the first core 521 and the second core 522, which are away from the connector 523, are open. This can be interpreted as forming a ∧-shaped structure. By configuring the evaporator 50 as two cores connected at one end and open at the other end, this embodiment increases the heat exchange area and improves heat transfer efficiency.

[0070] On the other hand, one embodiment of the present application provides an air conditioning unit, comprising a dual-cold source evaporator according to any of the above embodiments, wherein the second cold source circuit 20 further comprises a condensing assembly connected to the second cold source coil 21; the condensing assembly comprises a condenser 22, a fluorine pump 23, and a second cold source pipeline, the second cold source pipeline connecting the condenser 22, the fluorine pump 23, and the second cold source coil 21 to circulate the second cold source. A fluorine injection nozzle 25, a second pressure sensor 26, and a second temperature sensor 27 are also provided on the second cold source pipeline. The fluorine injection nozzle 25 is used to inject the second cold source into the second cold source coil 21, and the second pressure sensor 26 and the second temperature sensor 27 are used to detect the pressure and temperature of the second cold source, respectively. Specifically, the second cold source pipeline comprises a second cold source liquid inlet pipe 241 and a second cold source liquid return pipe 242. Multiple fluorine injection nozzles 25 are provided on the second cold source liquid return pipe 242 to facilitate the injection of the second cold source into the second cold source liquid return pipe 242, thereby preventing the second cold source from being reduced due to leakage, discharge, or other reasons, which could affect the normal operation of the entire air conditioning unit. The second pressure sensor 26 includes a low-pressure sensor 261 located at the outlet of the second heat sink coil 21 and a high-pressure sensor 262 located at the outlet of the condenser 22. The low-pressure sensor 261 is used to detect the pressure of the second heat sink at the outlet of the second heat sink coil 21. If the pressure of the second heat sink is too low, it may indicate insufficient heat sink and require additional heat sink. The high-pressure sensor 262 is used to detect the pressure of the second heat sink at the outlet of the condenser 22, thereby controlling and regulating the flow rate of the second heat sink in the second heat sink coil 21. A second temperature sensor 27 is installed on each of the second heat sink inlet pipe 241 and the second heat sink return pipe 242. The second temperature sensor 27 is used to detect the temperature of the second heat sink in the second heat sink inlet pipe 241 and the second heat sink return pipe 242. By detecting temperature changes, the temperature of the second heat sink in the second heat sink coil 21 can be determined, thereby controlling and regulating the flow rate of the second heat sink in the second heat sink coil 21. The fluorine pump 23 can be a variable frequency fluorine pump.

[0071] The second cooling source circuit 20 is also equipped with multiple ball valves 28. By adjusting the opening of the ball valves 28, the flow rate of the second cooling source in the second cooling source circuit 20 can be controlled to adjust the cooling effect. For example, to increase the cooling effect, the ball valves 28 can be opened wider to increase the flow rate; to reduce the cooling effect, the ball valves 28 can be closed to reduce the flow rate. Furthermore, during pipeline maintenance or troubleshooting, the ball valves 28 can be closed to cut off the flow, facilitating repair or equipment replacement. Furthermore, second pressure sensors 26 are provided on both the inlet and outlet sides of the fluorine pump 23 to detect the pressure on the inlet and outlet sides of the fluorine pump 23, respectively. By comparing the inlet and outlet pressures, the operating parameters of the fluorine pump 23 can be adjusted according to actual needs, such as adjusting the opening of the inlet valves or the speed of the fluorine pump 23. Optionally, a bypass pipe is provided in parallel with the fluorine pump 23 to adjust the pressure of the second cooling source in the second cooling source circuit 20.

[0072] In the air conditioning unit provided in this embodiment, the first cold source circuit 10 uses the opening and closing of the electric valve 12 to control the circulation of the first cold source within the first cold source circuit 10. The second cold source circuit 20 uses a fluorine pump 23 as a power source to circulate the second cold source. Heat from the evaporator 50 is discharged to the outside of the air conditioning unit through the first cold source circuit 10 and the second cold source circuit 20. Compared with air conditioning units in the prior art, the addition of a chilled water circuit eliminates the compressor and the complex compressor piping, thereby reducing the energy consumption of the air conditioning unit. In addition, the elimination of the compressor and the complex compressor piping significantly reduces the wind-side resistance of the air conditioning unit, and the power consumption of the fan is also correspondingly reduced.

[0073] In an optional embodiment, a drying filter 2411 is provided on the second cold source liquid inlet pipe 241, and the drying filter 2411 is used to dry and remove impurities from the second cold source, remove potential moisture and impurities, and ensure the purity and stability of the second cold source.

[0074] In an optional embodiment, a plurality of electronic expansion valves 2412 are provided on the second cold source liquid inlet pipe 241. By providing a plurality of electronic expansion valves 2412, the second cold source can realize flow distribution and regulation in the second cold source liquid inlet pipe 241. Specifically, each electronic expansion valve 2412 can independently control the flow of a portion of the second cold source, so that the second cold source can be evenly distributed to various areas before entering the second cold source coil 21. Therefore, the plurality of electronic expansion valves 2412 improves the uniformity of the second cold source in the second cold source coil 21, avoiding local overcooling or overheating. In addition, in the dehumidification scenario, the opening of each electronic expansion valve 2412 can be independently adjusted as needed, thereby achieving precise control of the temperature of the second cold source coil 21.

[0075] Referring to Figures 8-11 , in an optional embodiment, an air conditioning unit includes an indoor unit 60 and an outdoor unit 70. The indoor unit 60 includes a plurality of indoor units 61, each of which has an indoor air duct formed therein, and an evaporator 50 disposed therein. Each indoor unit 61 can independently control temperature and air speed, meeting the air conditioning needs of multiple rooms or areas. Since the air conditioning unit includes the dual-cold-source evaporator of any of the aforementioned embodiments, it also achieves the same technical effects as the dual-cold-source evaporator, and therefore will not be further described here.

[0076] Please refer to Figures 12-14 in conjunction with each other. In an optional embodiment, a condensing assembly is installed in the outdoor unit 70, and the condensing assembly also includes a condensing fan 71 arranged corresponding to the condenser 22 and a liquid reservoir 72 arranged between the condenser 22 and the fluorine pump 23. The condenser 22 includes two condenser bodies installed obliquely in the outdoor unit 70, and the two condenser bodies form a V-shaped air duct structure. The fluorine pump 23 and the liquid reservoir 72 are both arranged in a space on one side of the condenser 22 away from the air duct structure. By installing the condenser 22 at an angle and forming a V-shaped air duct structure, this embodiment can increase the area of ​​the condenser 22, improve condensation efficiency, and effectively discharge heat carried by the second cold source. In addition, by arranging the fluorine pump 23 and the liquid reservoir 72 in a space on the side of the condenser 22 away from the air duct structure, the space inside the outdoor unit 70 can be better utilized and the volume of the outdoor unit 70 can be reduced. The liquid reservoir 72 is used to store or release the second cold source. When the fluorine pump 23 is operating, the fluorine pump 23 extracts the second cold source from the liquid reservoir 72 and sends it to the condenser 22 for cooling. Conversely, when the fluorine pump 23 stops operating, the liquid reservoir 72 can store a certain amount of the second cold source and keep it in a liquid state.

[0077] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. The scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A dual cold source evaporator, characterized in that: It comprises a first cold source circuit carrying a first cold source and a second cold source circuit carrying a second cold source, wherein the first cold source circuit comprises a first cold source coil, and the second cold source circuit comprises a second cold source coil; The first cold source coil and the second cold source coil together form an evaporator coil.

2. The dual cold source evaporator according to claim 1, characterized in that: The first cold source circuit is a chilled water circuit, the first cold source coil is a chilled water coil, and / or, The second cold source circuit is a refrigerant circuit, and the second cold source coil is a refrigerant coil.

3. The dual cold source evaporator according to claim 2, characterized in that: The first cold source circuit includes one chilled water circuit, and the second cold source circuit includes a plurality of refrigerant circuits.

4. The dual cold source evaporator according to claim 1, characterized in that: The first cold source coil and the second cold source coil share a set of evaporating fans; and / or, The first cold source coil and the second cold source coil share a set of fin groups.

5. The dual cold source evaporator according to claim 1, characterized in that: The first cold source coil includes a plurality of first cold source sub-coils arranged along the height direction of the evaporator, and the second cold source coil includes a plurality of second cold source sub-coils arranged along the height direction of the evaporator. Each of the first cold source sub-coils and one of the second cold source sub-coils are arranged along the thickness direction of the evaporator.

6. The dual cold source evaporator according to claim 5, characterized in that: Each of the first heat sink sub-coil and the corresponding second heat sink sub-coil form a group; Each of the first cold source sub-coils includes a plurality of rows of first pipes, and each of the second cold source sub-coils includes a plurality of rows of second pipes. The plurality of rows of first pipes and the plurality of rows of second pipes are arranged alternately along the thickness direction of the evaporator.

7. The dual cold source evaporator according to claim 1, characterized in that: The first cold source circuit further includes an electric valve and a first cold source pipeline connected between the electric valve and the first cold source coil, and the opening and closing of the electric valve is used to control the circulation flow of the first cold source in the first cold source circuit; The first cold source pipeline is provided with a first pressure sensor and a first temperature sensor, and the first pressure sensor and the first temperature sensor are used to detect the pressure and temperature of the first cold source respectively.

8. The dual cold source evaporator according to claim 1, characterized in that: The evaporator comprises two cores which are connected at one end and opened at the other end, and the evaporator coil is arranged in each core.

9. An air conditioning unit, characterized in that: The dual cold source evaporator comprises the dual cold source evaporator according to any one of claims 1 to 8, wherein: The second cold source circuit also includes a condensing component connected to the second cold source coil; the condensing component includes a condenser, a fluorine pump and a second cold source pipeline, and the second cold source pipeline connects the condenser, the fluorine pump and the second cold source coil to allow the second cold source to circulate.

10. The air conditioning unit according to claim 9, characterized in that: The air conditioning unit comprises an indoor unit and an outdoor unit; the indoor unit comprises a plurality of indoor unit units, each of which has an indoor air duct formed inside, and the evaporator is arranged in the indoor air duct; the outdoor unit is equipped with the condensing assembly, and the condensing assembly further comprises a condensing fan arranged corresponding to the condenser and a liquid storage device arranged between the condenser and the fluorine pump; and / or, The second cold source pipeline is also provided with a fluorine injection nozzle, a second pressure sensor and a second temperature sensor. The fluorine injection nozzle is used to inject the second cold source into the second cold source coil, and the second pressure sensor and the second temperature sensor are used to detect the pressure and temperature of the second cold source respectively.

11. A dual cold source evaporator, characterized in that: include: An evaporator end plate, a fin group and an evaporator coil, wherein the evaporator end plates are respectively arranged at both ends of the fin group, and the evaporator coil is arranged on the fin group; the evaporator coil includes a first cold source coil and a second cold source coil, the first cold source coil is located on a first cold source circuit carrying a first cold source, and the second cold source coil is located on a second cold source circuit carrying a second cold source.

12. The dual cold source evaporator according to claim 11, characterized in that: The fin group includes a plurality of fins that are spaced apart and arranged in parallel, and the fin group is closely matched with the evaporator coil; the height and width of the fin group are matched with the height and width of the evaporator respectively.

13. The dual cold source evaporator according to claim 12, characterized in that: The fins and the evaporator end plates are provided with multiple rows of through holes, and multiple pipes are respectively inserted into the through holes of the fins and the evaporator end plates and fixed. The evaporator end plates are connected to adjacent pipes by U-shaped elbows.

14. The dual cold source evaporator according to claim 11, characterized in that: The first cold source coil includes a plurality of first cold source sub-coils arranged along the height direction of the evaporator, and the second cold source coil includes a plurality of second cold source sub-coils arranged along the height direction of the evaporator. Each of the first cold source sub-coils and one of the second cold source sub-coils are arranged along the thickness direction of the evaporator.

15. The dual cold source evaporator according to claim 13, characterized in that: Each of the first cold source sub-coil and the corresponding second cold source sub-coil form a group, each of the first cold source sub-coil includes multiple rows of first pipes, and each of the second cold source sub-coil includes multiple rows of second pipes, and the multiple rows of first pipes and the multiple rows of second pipes are arranged alternately along the thickness direction of the evaporator.

16. The dual cold source evaporator according to claim 13, characterized in that: The fin group and the evaporator end plate are respectively provided with a first group of through holes for the first pipe to penetrate and a second group of through holes for the second pipe to penetrate in the thickness direction of the evaporator, and the first group of through holes and the second group of through holes are arranged at intervals in the thickness direction of the evaporator.

17. The dual cold source evaporator according to claim 16, characterized in that: The first pipe of each first cold source sub-coil is respectively inserted into the corresponding first group of through holes to form the first cold source coil; the second pipe of each second cold source sub-coil is respectively inserted into the corresponding second group of through holes to form the second cold source coil.

18. The dual cold source evaporator according to any one of claims 11 to 17, characterized in that: The first cold source circuit is a chilled water circuit, the first cold source coil is a chilled water coil, and / or the second cold source circuit is a refrigerant circuit, the second cold source coil is a refrigerant coil.

19. An air conditioning unit, comprising an indoor unit and an outdoor unit; characterized in that: The indoor unit includes a plurality of indoor unit units, an indoor air duct is formed inside each of the indoor unit units, and the dual cold source evaporator according to claim 18 is arranged in the indoor air duct.

20. The air conditioning unit according to claim 19, characterized in that: The first cold source circuit also includes an electric valve and a first cold source pipeline connected between the electric valve and the first cold source coil, and the opening and closing of the electric valve is used to control the circulation of the first cold source in the first cold source circuit; a first pressure sensor and a first temperature sensor are respectively provided on the first cold source pipeline, the first pressure sensor is used to detect the pressure of the first cold source, and the first temperature sensor is used to detect the temperature of the first cold source, so as to control the flow rate of the first cold source in the first cold source coil; The second cold source circuit also includes a condensing component connected to the second cold source coil, the condensing component includes a condenser, a fluorine pump and a second cold source pipeline, the second cold source pipeline connects the condenser, the fluorine pump and the second cold source coil to allow the second cold source to circulate; a second pressure sensor and a second temperature sensor are respectively arranged on the second cold source pipeline, the second pressure sensor is used to detect the pressure of the second cold source, and the second temperature sensor is used to detect the temperature of the second cold source, so as to control the flow rate of the second cold source in the second cold source coil.

Images