CN117628739A - Double-cold-source evaporator and air conditioning unit - Google Patents

Abstract

The invention provides a double-cold-source evaporator and an air conditioning unit, and relates to the technical field of refrigeration, wherein the double-cold-source evaporator comprises a first cold source loop carrying a first cold source and a second cold source loop carrying a second cold source, the first cold source loop comprises a first cold source coil, and the second cold source loop comprises a second cold source coil; the first and second cold source coils together form an evaporator coil. The double-cold-source evaporator can select and use the operation mode of the first cold source loop, the second cold source loop or both according to specific working conditions and requirements so as to meet different refrigeration requirements, thereby achieving better energy-saving effect and heat transfer efficiency. The air conditioning unit comprises the double-cold-source evaporator, and compared with the air conditioning unit in the prior art, a compressor and a complex compressor pipeline are omitted, so that the energy consumption of the air conditioning unit is reduced. Further, the wind side resistance of the air conditioning unit is greatly reduced, and the power consumption of the fan is correspondingly reduced.

Description

Double-cold-source evaporator and air conditioning unit

Technical Field

The invention relates to the technical field of refrigeration, in particular to a double-cold-source evaporator and an air conditioning unit.

Background

Because of the current energy conservation, emission reduction and environmental protection requirements, higher requirements are put forward for energy consumption and cold energy in the refrigeration industry, and the reliability and stability of the operation of the energy conservation and refrigeration system become the primary requirements of users.

In the process of implementing the present invention, the inventor finds that at least the following problems exist in the prior art:

the operation mode of the air conditioning unit is single, the operation requirements of various conditions among equipment cannot be met, in the normal case, the equipment among the machine room adopts the terminal chilled water or the air-cooled compressor to operate, or adopts the outdoor water-cooled indoor air-cooled operation mode, and the single operation mode cannot be flexibly switched according to the actual refrigeration requirement, so that the efficient energy-saving effect cannot be realized.

Disclosure of Invention

The invention aims to provide an efficient and energy-saving double-cold-source evaporator and an air conditioning unit provided with the same.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

the double-cold-source evaporator comprises a first cold source loop carrying a first cold source and a second cold source loop carrying a second cold source, wherein the first cold source loop comprises a first cold source coil, and the second cold source loop comprises a second cold source coil;

the first and second cold source coils together form an evaporator coil.

Further, the first cold source loop is a chilled water loop, the first cold source coil is a chilled water coil, and/or,

the second cold source loop is a refrigerant loop, and the second cold source coil is a refrigerant coil.

Further, the first cold source loop comprises one chilled water loop, and the second cold source loop comprises a plurality of refrigerant loops.

Further, the first cold source coil and the second cold source coil share one set of evaporation fan; and/or the number of the groups of groups,

the first cold source coil pipe and the second cold source coil pipe share a set of fin groups.

Further, the first cold source coil comprises a plurality of first cold source sub-coils which are arranged along the height direction of the evaporator, and the second cold source coil comprises a plurality of second cold source sub-coils which are arranged along the height direction of the evaporator; each first cold source sub-coil and one second cold source sub-coil are arranged along the thickness direction of the evaporator.

Further, each first cold source sub-coil and the corresponding second cold source sub-coil form a group;

each first cold source sub-coil pipe comprises a plurality of rows of first pipelines, each second cold source sub-coil pipe comprises a plurality of rows of second pipelines, and the plurality of rows of first pipelines and the plurality of rows of second pipelines are arranged in a staggered manner along the thickness direction of the evaporator.

Further, the first cold source loop further comprises 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 for controlling the first cold source to circularly flow in the first cold source loop;

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 respectively used for detecting the pressure and the temperature of the first cold source.

Further, the evaporator comprises two cores with one end connected and the other end arranged in an opening, and each core is internally provided with the evaporator coil.

On the other hand, the invention also provides an air conditioning unit, which comprises the double-cold-source evaporator in any one of the embodiments, wherein,

the second cold source loop further comprises a condensation component connected with the cold source coil; the condensing assembly comprises a condenser, a fluorine pump and a second cold source pipeline, and the second cold source pipeline is communicated with the condenser, the fluorine pump and the second cold source coil pipe so as to enable the second cold source to circularly flow.

Further, the air conditioning unit comprises an indoor unit and an outdoor unit; the indoor unit comprises a plurality of indoor unit units, an indoor air channel is formed in each indoor unit, and the evaporator is arranged in each indoor air channel; the condensing assembly is arranged in the outdoor unit and further comprises a condensing fan and a liquid reservoir, wherein the condensing fan is arranged corresponding to the condenser, and the liquid reservoir is arranged between the condenser and the fluorine pump; and/or the number of the groups of groups,

the second cold source pipeline is further provided with a fluorine injection nozzle, a second pressure sensor and a second temperature sensor, wherein the fluorine injection nozzle is used for injecting the second cold source into the second cold source coil pipe, and the second pressure sensor and the second temperature sensor are respectively used for detecting the pressure and the temperature of the second cold source.

Compared with the prior art, the double-cold-source evaporator provided by the invention has at least the following technical effects:

the method comprises the steps that through a first cold source loop carrying a first cold source and a second cold source loop carrying a second cold source, the first cold source loop comprises a first cold source coil, and the second cold source loop comprises a second cold source coil; the first cold source coil pipe and the second cold source coil pipe jointly form the arrangement of the evaporator coil pipe, and the double-cold source evaporator can select one of the first cold source loop and the second cold source loop or an operation mode of two simultaneous operation according to specific working conditions and requirements so as to meet different refrigeration requirements, thereby achieving better energy-saving effect and heat transfer efficiency.

In the above embodiments, the air conditioning unit and the corresponding dual-cold-source evaporator embodiments may have the same technical effects, and are not described herein again; in addition, in the air conditioning unit, the first cold source loop can independently control the first cold source to circularly flow in the first cold source loop, the second cold source loop adopts the fluorine pump as a power source, and the heat of the evaporator is discharged to the outside of the air conditioning unit through the first cold source loop/the second cold source loop. Furthermore, as the compressor and the complicated compressor pipeline are omitted, the wind side resistance of the air conditioning unit is greatly reduced, and the power consumption of the fan is correspondingly reduced.

Drawings

FIG. 1 is a schematic diagram of the principle structure of an evaporator coil in one embodiment;

FIG. 2 is a schematic diagram of a first heat sink circuit in an embodiment;

FIG. 3 is a schematic diagram of a second heat sink circuit in an embodiment;

FIG. 4 is a front view of an evaporator according to an embodiment;

FIG. 5 is a flow chart of a first heat sink coil on an evaporator according to an embodiment;

FIG. 6 is a flow chart of a second heat sink coil on an evaporator according to an embodiment;

FIG. 7 is a schematic view of an evaporator according to another embodiment;

FIG. 8 is a schematic diagram of a structure of an air conditioning unit according to an embodiment;

fig. 9 is a front view of fig. 8;

FIG. 10 is a side view of FIG. 8;

FIG. 11 is a bottom view of FIG. 8;

fig. 12 is a schematic view illustrating a structure of an outdoor unit according to an embodiment;

fig. 13 is a front view of fig. 12;

fig. 14 is a top view of fig. 12.

Reference numerals illustrate:

10. a first cold source loop; 11. a first cold source coil; 111. a first cold source sub-coil; 12. an electric valve; 131. a first cold source liquid inlet pipe; 132. a first cold source liquid return pipe; 14. a first temperature sensor; 15. a first pressure sensor; 20. a second cold source loop; 21. a second cold source coil; 211. a second cold source sub-coil; 22. a condenser; 23. a fluorine pump; 241. a second cold source liquid inlet pipe; 2411. drying the filter; 2412. an electronic expansion valve; 242. a second cold source liquid return pipe; 25. a fluorine injection nozzle; 26. a second pressure sensor; 261. a low pressure sensor; 262. a high-pressure sensor; 27. a second temperature sensor; 28. a ball valve; 30. an evaporation fan; 40. a fin group; 50. an evaporator; 51. an evaporator coil; 521. a first core; 522. a second core; 523. a connecting piece; 53. an evaporator end plate; 54. a fin; 541. a first set of through holes; 5411. a first set of one-row vias; 5412. a first set of two rows of through holes; 5413. a first set of three rows of through holes; 542. a second set of through holes; 5421. a second set of one-row vias; 5422. a second set of two rows of through holes; 5423. a second set of three rows of through holes; 60. an indoor unit; 61. an indoor unit; 70. an outdoor unit; 71. a condensing fan; 72. a reservoir.

Detailed Description

The technical scheme of the invention is further elaborated below by referring to the drawings in the specification and the specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or a different subset of all possible embodiments and may be combined with each other without conflict.

It will be further understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1-3, an embodiment of the present invention provides a dual-cold-source evaporator, which includes a first cold-source circuit 10 carrying a first cold source and a second cold-source circuit 20 carrying a second cold source, wherein 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 and second cold source coils 11, 21 together form an evaporator coil 51. Specifically, referring to fig. 4-6 in combination, the evaporator 50 includes an evaporator end plate 53, a fin group 40 and an evaporator coil 51, the evaporator end plate 53 is respectively disposed at two 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 each formed by connecting a plurality of pipes, the fin group 40 includes a plurality of fins 54, the fins 54 and the evaporator end plate 53 are provided with a plurality of rows of through holes, the plurality of pipes are respectively inserted into the through holes of the fin group 40 and the evaporator end plate 53 to be fixed, and a U-shaped elbow is used at the evaporator end plate 53 to be communicated with adjacent pipes to guide the cold source to flow from an inlet to an outlet, so as to form a circulation loop; wherein the fins 54 are used for enhancing heat exchange between the coil and air, and the evaporator end plate 53 is used for supporting and fixing. The first cold source coil 11 and the second cold source coil 21 can be flat pipes or round pipes made of metal, and can be made of copper, aluminum or stainless steel, and the like, and have good heat conducting performance and corrosion resistance. The choice of flat and round tubes depends on the specific application requirements and design requirements. Flat tubes generally provide a larger heat exchange area, while round tubes have better fluid flow properties.

In the embodiment, the first cold source loop 10 carrying the first cold source and the second cold source loop 20 carrying the second cold source are used, the first cold source loop 10 comprises a first cold source coil 11, and the second cold source loop 20 comprises a second cold source coil 21; the first cold source coil 11 and the second cold source coil 21 jointly form the arrangement of the evaporator coil 51, and the double-cold source evaporator can select and use the operation modes of the first cold source loop 10, the second cold source loop 20 or both to work simultaneously according to specific working conditions and demands so as to meet different refrigeration requirements, thereby achieving better energy-saving effect and heat transfer efficiency.

In an alternative 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. Wherein the chilled water loop is a pipeline system for circulating chilled water, and the chilled water loop is communicated with the chilled water coil pipe and conveys the chilled water to the chilled water coil pipe. Chilled water is typically provided by chilled water plants, such as chiller units or cooling towers. The chilled water has higher specific heat capacity and thermal conductivity, and can better absorb and transfer heat, thereby realizing efficient heat dissipation. The refrigerant loop is a pipeline system for circulating the refrigerant, and is communicated with the refrigerant coil pipe to convey the refrigerant into the refrigerant coil pipe. The refrigerant is a substance which is easy to absorb heat and become gas and easy to release heat and become liquid, and can absorb and release a large amount of heat at a lower temperature, thereby realizing high efficiency and energy saving. The refrigerant in this embodiment may be freon, which is a synthetic fluorocarbon, and is commonly R22 (chlorodifluoromethane), R134a (1, 2-tetrafluoroethane), etc., which have good refrigeration performance and chemical stability. It should be further noted 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 requirements and operation conditions so as to achieve better energy-saving effect and heat transfer efficiency. For example, when the external temperature is low, such as in winter, only a refrigerant coil pipe can be adopted, and the advantage that the refrigerant can still absorb and release a large amount of heat at a low temperature is utilized, so that on one hand, the energy consumption of chilled water is reduced, and on the other hand, the energy-saving effect is achieved, and on the other hand, the pipeline does not generate frost cracking phenomenon; when the external temperature is higher, 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 circulating chilled water, and the refrigerant coil further reduces the temperature by means of the refrigeration effect of the refrigerant; when the outside temperature is higher than the indoor return air temperature, the refrigerating requirement can be met by using only the chilled water coil. The synergistic effect of the chilled water coil and the refrigerant coil can better absorb and transfer heat and improve the refrigeration efficiency. According to the embodiment, the chilled water coil and the refrigerant coil are integrated, and the chilled water coil and the refrigerant coil or both can be selected to work simultaneously according to specific working conditions and requirements so as to meet different refrigeration requirements, thereby achieving better energy-saving effect and heat transfer efficiency.

In an alternative embodiment, the first cold source circuit 10 comprises a chilled water circuit and the second cold source circuit 20 comprises a plurality of refrigerant circuits. Wherein the different refrigerant circuits can be operated 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 used may be selected according to the cooling requirement, for example, when the cooling requirement is not high, only a part of refrigerant circuits may be used to reduce energy consumption and operation cost, and in a specific example, as shown in fig. 1, the refrigerant circuits include two refrigerant circuits. In addition, the provision of multiple refrigerant circuits can improve the fault tolerance of the evaporator 50, i.e. if one refrigerant circuit fails, the other refrigerant circuits can still continue to provide the refrigerating capability to maintain the normal operation of the evaporator 50. The embodiment can provide greater flexibility and adjustment capability by arranging a plurality of refrigerant loops so as to meet different refrigeration demands.

In an alternative embodiment, the first cold source coil 11 and the second cold source coil 21 share a set of evaporator fans 30. The evaporating fan 30 is used for introducing the hot air of indoor return air into the evaporator 50 to be in surface contact with the first cold source coil 11 and the second cold source coil 21, and the first cold source in the first cold source coil 11 and/or the second cold source in the second cold source coil 21 absorbs heat in the hot air, and becomes cold air to return to the indoor. The evaporating fan 30 continuously operates to enable the first heat sink in the first heat sink coil 11 and/or the second heat sink in the second heat sink coil 21 to continuously absorb heat and to send cool air into a space to be cooled. In this embodiment, the first cold source coil 11 and the second cold source coil 21 share one set of evaporation fan 30, so that the number of components can be reduced, and space can be saved.

Referring to fig. 4, in an alternative embodiment, the first cold source coil 11 and the second cold source coil 21 share a set of fins 40, where the fins 40 are formed by a plurality of fins 54 (not shown) arranged in parallel at intervals, for example, aluminum foil fins with a thickness of about 0.1mm may be used, and the interval between the fins is about 1.5 mm. The fin sets 40 are in close fit with the evaporator coil 51 without relative displacement. The height of the fin group 40 matches the height of the evaporator 50, and the width of the fin group 40 matches the width of the evaporator 50.

Referring to fig. 5 and 6 in combination, in an alternative embodiment, the first cold source coil 11 includes a plurality of first cold source sub-coils 111 arranged along the height direction of the evaporator 50, and the second cold source coil 21 includes a plurality of second cold source sub-coils 211 arranged along the height direction of the evaporator 50, and each of the first cold source sub-coils and 111 a second cold source sub-coil 211 are arranged along the thickness direction of the evaporator 50. It should be further noted that the first cold source circuit 10 includes a first cold source liquid inlet pipe 131 and a first cold source liquid return pipe 132, the first cold source liquid inlet pipe 131 conveys the first cold source to the first cold source sub-coil 111, and the first cold source flows through the first cold source sub-coil 111 and then flows back to the first cold source liquid return pipe 132. Similarly, the second cold source circuit 20 includes a second cold source liquid inlet pipe 241 and a second cold source liquid return pipe 242, where the second cold source liquid inlet pipe 241 conveys the second cold source to the second cold source sub-coil 211, and the second cold source flows through the second cold source sub-coil 211 and then flows back to the second cold source liquid return pipe 242. The first cold source sub-coil 111 and the second cold source sub-coil 211 may be arranged in parallel or staggered. Specifically, in the parallel arrangement, the first and second cold source sub-coils 111 and 211 are arranged in parallel on the fin group 40 and the evaporator support plate 53, respectively. In the staggered arrangement, the first cold source sub-coil 111 and the second cold source sub-coil 211 are staggered on the fin group 40 and the evaporator supporting plate 53, so that the flow path is more complex, the contact area between the cold source and the air is larger, and the heat exchange efficiency is higher.

In an alternative 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 a plurality of rows of first tubes, each second cold source sub-coil 211 includes a plurality of rows of second tubes, and the plurality of rows of first tubes and the plurality of second tubes are arranged in a staggered manner along the thickness direction of the evaporator 50.

In an alternative embodiment, the fin group 40 and the evaporator end plate 54 are provided with two sets of through holes, i.e., a first set of through holes 541 through which a first pipe penetrates and a second set of through holes 542 through which a second pipe penetrates, respectively, in the thickness direction of the evaporator 50. In the present embodiment, the first group of through holes 541 and the second group of through holes 542 are arranged at intervals in the thickness direction of the evaporator, for example, 6 columns of through holes are provided in the thickness direction of the evaporator, and then the 1 st column of through holes, the 3 rd column of through holes, and the 5 th column of through holes constitute the first group of through holes 541; the 2 nd, 4 th, and 6 th column vias make up a second set of vias 542.

The first pipe of each first cold source sub-coil 111 is inserted into a corresponding first group of through holes 541, respectively, to form a first cold source coil 11 composed of a plurality of first cold source sub-coils 111 distributed along the height of the evaporator; the second tube of each second cold source sub-coil 211 is inserted into a corresponding second set of through holes 542, respectively, to form a second cold source coil 21 composed of a plurality of second cold source sub-coils 211 distributed along the height of the evaporator.

In a particular embodiment, first set of through holes 541 includes a first set of one-column through holes 5411, a first set of two-column through holes 5412, and a first set of three-column through holes 5413, second set of through holes 542 includes a second set of one-column through holes 5421, a second set of two-column through holes 5422, and a second set of three-column through holes 5423, and, correspondingly, each first heat-sink sub-coil 111 includes a first column of first tubing, a second column of first tubing, and a third column of first tubing, and each second heat-sink sub-coil 211 includes a first column of second tubing, a second column of second tubing, and a third column of second tubing. The first group of first through holes 5411, the second group of first through holes 5421, the first group of second through holes 5412, the second group of second through holes 5422, the first group of third through holes 5413 and the second group of third through holes 5423 are sequentially arranged 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 each first cold source sub-coil 111 in the first group of through holes 541, so that the first cold source sub-coils 111 and the second cold source sub-coils 211 are arranged in a staggered manner. The first cold source sub-coil 111 corresponds to the first group of through holes 541, and is first coiled around the first group of through holes 5411 to form a first row of first pipes by a certain height, then coiled around the second group of through holes 5421 to form a second row of first pipes by a certain length, and then coiled around the second group of through holes 5412 in the opposite direction, and finally coiled around the first group of three rows of through holes 5413 to form a third row of first pipes by a certain length; the second heat-sink sub-coil 211 corresponds to the second set of through holes 542, and first forms a first row of second pipes by winding around the second set of first row through holes 5421 to a certain height, and then forms a second row of second pipes by winding around the first set of second row through holes 5412 in the opposite direction to the second set of second row through holes 5422, and then forms a third row of second pipes by winding around the second set of third row through holes 5423 after crossing the first set of third row through holes 5413, and the first heat-sink sub-coil 111 and the second heat-sink sub-coil 211 form a group by the above-mentioned staggered arrangement. It should be noted that, the bending forms of the first cold source sub-coil 111 and the second cold source sub-coil 211 are not limited to the specific forms described in the above embodiments, and the first cold source sub-coil 111 and the second cold source sub-coil 211 can increase the flow path lengths of the two types of cold sources in the corresponding pipelines by forming the bending forms, and can also maintain the cooling uniformity in the co-working state of the two types of cold sources, and the first cold source sub-coil 111 and the second cold source sub-coil 211 of adjacent groups are symmetrically distributed in the height direction of the evaporator 50.

Referring to fig. 1-3 in combination, in an alternative embodiment, the first cold source circuit 10 further includes an electric valve 12 and a first cold source pipeline connected between the electric valve 12 and the first cold source coil 11, where the electric valve 12 is used to control the first cold source to circulate in the first cold source circuit 10; the first cold source pipeline is provided with a first pressure sensor 15 and a first temperature sensor 14, and the first pressure sensor 15 and the first temperature sensor 14 are respectively used for detecting the pressure and the temperature of the first cold source. The first cold source pipeline comprises a first cold source liquid inlet pipe 131 and a first cold source liquid return pipe 132, and the electric valve 12 is arranged on the first cold source liquid return pipe 132 and used for controlling the first cold source to circularly flow in the first cold source coil 11. The motor-operated valve 12 may be a two-way valve. The first cold source liquid inlet pipe 131 and the first cold source liquid return pipe 132 are respectively provided with a first pressure sensor 15 and a first temperature sensor 14. The first pressure sensor 15 and the first temperature sensor 14 are used for detecting the pressure and the temperature of the first cold source in the first cold source liquid inlet pipe 131 and the first cold source liquid return pipe 132, and by detecting the changes of the pressure and the temperature, the pressure and the temperature state of the first cold source in the first cold source coil 11 can be judged, so that the flow of the first cold source in the first cold source coil 11 can be controlled and regulated.

Referring to fig. 7, in an alternative embodiment, the evaporator 50 includes two cores with one end connected and the other end disposed in an opening, and the evaporator coil 51 is disposed in each of the cores. Specifically, the evaporator 50 includes a first core 521, a second core 522, and a connecting member 523, wherein one end of the first core 521 is connected to one end of the second core 522 through the connecting member 523, and one ends of the first core 521 and the second core 522, which are far from the connecting member 523, are disposed in an opening, which may be explained as a structure in which the first core 521 and the second core 522 are formed in a shape of a Λ. In this embodiment, the evaporator 50 is configured as a core body with two ends connected and the other end being provided with an opening, so that the heat exchange area is increased and the heat transfer efficiency is improved.

In another aspect, an embodiment of the present invention provides an air conditioning unit, including the dual-cold-source evaporator of any of the above embodiments, wherein the second cold-source circuit 20 further includes a condensing assembly connected to the second cold-source coil 21; the condensing assembly includes a condenser 22, a fluorine pump 23, and a second cold source line communicating the condenser 22, the fluorine pump 23, and the second cold source coil 21 to circulate the second cold source. The second cold source pipeline is also provided with a fluorine injection nozzle 25, a second pressure sensor 26 and a second temperature sensor 27, wherein the fluorine injection nozzle 25 is used for injecting a second cold source into the second cold source coil 21, and the second pressure sensor 26 and the second temperature sensor 27 are respectively used for detecting the pressure and the temperature of the second cold source. It should be noted that, the second cold source pipeline includes a second cold source liquid inlet pipe 241 and a second cold source liquid return pipe 242, and the second cold source liquid return pipe 242 is provided with a plurality of fluorine injection nozzles 25, so that the second cold source is conveniently injected into the second cold source liquid return pipe 242, and the second cold source is prevented from being reduced due to leakage, emission or other reasons, and the normal operation of the whole air conditioning unit is affected. The second pressure sensor 26 includes a low pressure sensor 261 disposed at the outlet of the second cold source coil 21 and a high pressure sensor 262 disposed at the outlet of the condenser 22, where the low pressure sensor 261 is used to detect the pressure of the second cold source at the outlet of the second cold source coil 21, and if the pressure of the second cold source is too low, it may mean that the second cold source is insufficient, and the second cold source needs to be injected. The high pressure sensor 262 is used to detect the pressure of the second cold source at the outlet of the condenser 22 to control and regulate the flow of the second cold source in the second cold source coil 21. The second cold source liquid inlet pipe 241 and the second cold source liquid return pipe 242 are both provided with a second temperature sensor 27. The second temperature sensor 27 is configured to detect the temperature of the second cold source in the second cold source liquid inlet pipe 241 and the second cold source liquid return pipe 242, and determine the temperature state of the second cold source in the second cold source coil 21 by detecting the change of the temperature, so as to control and adjust the flow rate of the second cold source in the second cold source coil 21. The fluorine pump 23 may be a variable frequency fluorine pump.

The second cold source circuit 20 is further provided with a plurality of ball valves 28, and the flow rate of the second cold source in the second cold source circuit 20 can be controlled by adjusting the opening of the ball valves 28 so as to realize the adjustment of the refrigerating effect. For example, if it is desired to increase the cooling effect, the opening of the ball valve 28 may be appropriately opened to increase the flow rate; if it is desired to reduce the cooling effect, the opening of the ball valve 28 may be suitably closed to reduce the flow rate. In addition, during line maintenance or troubleshooting, the closeable ball valve 28 may act to intercept fluid, facilitating maintenance or replacement of equipment. Further, the inlet side and the outlet side of the fluorine pump 23 are respectively provided with a second pressure sensor 26, which respectively detects the pressure conditions of the inlet side and the outlet side of the fluorine pump 23, and by comparing the pressure conditions of the inlet side and the outlet side, the operation parameters of the fluorine pump 23, such as adjusting the opening of the inlet valve, adjusting the rotation speed of the fluorine pump 23, etc., can be adjusted according to the actual requirements. Optionally, a bypass pipe is provided in parallel with the fluorine pump 23, and the bypass pipe can adjust the pressure of the second cold source in the second cold source circuit 20.

In the air conditioning unit provided by the embodiment, the first cold source loop 10 adopts the opening and closing of the electric valve 12 to control the first cold source to circularly flow in the first cold source loop 10, the second cold source loop 20 adopts the fluorine pump 23 as a power source to circularly flow the second cold source, and the heat of the evaporator 50 is discharged to the outside of the air conditioning unit through the first cold source loop 10/the second cold source loop 20. In addition, because the compressor and the complicated compressor pipelines are eliminated, the wind side resistance of the air conditioning unit is greatly reduced, and the power consumption of the fan is correspondingly reduced.

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

In an alternative embodiment, the second cold source liquid inlet pipe 241 is provided with a plurality of electronic expansion valves 2412, and by providing a plurality of electronic expansion valves 2412, the second cold source can realize flow distribution and adjustment in the second cold source liquid inlet pipe 241. Specifically, each electronic expansion valve 2412 may independently control the flow of a portion of the second cold source, so that the second cold source may be uniformly distributed to each area before entering the second cold source coil 21, and thus, the plurality of electronic expansion valves 2412 improve uniformity of the second cold source in the second cold source coil 21, and avoid local supercooling or overheating. In addition, in the dehumidification scene, the opening degree of each electronic expansion valve 2412 can be independently adjusted according to the requirement, so that the accurate control of the temperature of the second cold source coil 21 is realized.

Referring to fig. 8 to 11 in combination, in an alternative embodiment, an air conditioning unit includes an indoor unit 60 and an outdoor unit 70; the indoor unit 60 includes a plurality of indoor unit units 61, and an indoor air duct is formed inside each indoor unit 61, and the evaporator 50 is disposed in the indoor air duct. Wherein each indoor unit 61 can independently control temperature and wind speed, and is suitable for air conditioning requirements of a plurality of rooms or areas. Because the air conditioning unit includes the dual-cold-source evaporator in any one of the embodiments, the air conditioning unit also has the same technical effects as the dual-cold-source evaporator, and will not be described again.

Referring to fig. 12-14, in an alternative embodiment, a condensing unit is installed in the outdoor unit 70, and the condensing unit further includes a condensing fan 71 disposed corresponding to the condenser 22 and a liquid reservoir 72 disposed between the condenser 22 and the fluorine pump 23. The condenser 22 includes two condenser bodies installed in the outdoor unit 70 in an inclined manner, and the two condenser bodies form a V-shaped air duct structure. The fluorine pump 23 and the reservoir 72 are both disposed in a space on a side of the condenser 22 remote from the air duct structure. According to the embodiment, the condenser 22 is obliquely arranged and the V-shaped air duct structure is formed, so that the area of the condenser 22 can be increased, the condensing efficiency is improved, and the heat carried by the second cold source is effectively discharged. In addition, the fluorine pump 23 and the liquid reservoir 72 are disposed in the space of the condenser 22 at the side far away from the air duct structure, so that the space inside the outdoor unit 70 can be better utilized, and the volume of the outdoor unit 70 can be reduced. The accumulator 72 is used for storing or releasing the second cold source, and when the fluorine pump 23 is operated, the fluorine pump 23 draws the second cold source from the accumulator 72 and sends it to the condenser 22 for cooling. Conversely, when the fluorine pump 23 is stopped, the accumulator 72 may store a certain amount of the second cold source to be maintained in a liquid state.

The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. The protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. The double-cold-source evaporator is characterized by comprising a first cold source loop carrying a first cold source and a second cold source loop carrying a second cold source, wherein the first cold source loop comprises a first cold source coil, and the second cold source loop comprises a second cold source coil;

the first and second cold source coils together form an evaporator coil.

2. The dual-cold source evaporator of claim 1, wherein 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 loop is a refrigerant loop, and the second cold source coil is a refrigerant coil.

3. The dual cold source evaporator of claim 2, wherein said first cold source circuit comprises one of said chilled water circuits and said second cold source circuit comprises a plurality of said refrigerant circuits.

4. The dual-cold source evaporator of claim 1, wherein the first cold source coil and the second cold source coil share a set of evaporator fans; and/or the number of the groups of groups,

the first cold source coil pipe and the second cold source coil pipe share a set of fin groups.

5. The dual-cold-source evaporator of claim 1, wherein the first cold-source coil comprises a plurality of first cold-source sub-coils arranged in a height direction of the evaporator, the second cold-source coil comprises a plurality of second cold-source sub-coils arranged in the height direction of the evaporator, and each of the first cold-source sub-coils and the second cold-source sub-coils are arranged in a thickness direction of the evaporator.

6. The dual-heat-sink evaporator of claim 5, wherein each of the first heat-sink sub-coils and the corresponding second heat-sink sub-coil form a group;

each first cold source sub-coil pipe comprises a plurality of rows of first pipelines, each second cold source sub-coil pipe comprises a plurality of rows of second pipelines, and the plurality of rows of first pipelines and the plurality of rows of second pipelines are arranged in a staggered manner along the thickness direction of the evaporator.

7. The dual-cold source evaporator of claim 1, wherein the first cold source circuit further comprises 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 for controlling the first cold source to circularly flow 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 respectively used for detecting the pressure and the temperature of the first cold source.

8. The dual cold source evaporator of claim 1, wherein the evaporator comprises two cores with one end connected and the other end arranged in an opening, and the evaporator coil is arranged in each core.

9. An air conditioning unit comprising the dual cold source evaporator as set forth in any one of claims 1 to 8, wherein,

the second cold source loop further comprises a condensation component connected with the second cold source coil; the condensing assembly comprises a condenser, a fluorine pump and a second cold source pipeline, and the second cold source pipeline is communicated with the condenser, the fluorine pump and the second cold source coil pipe so as to enable the second cold source to circularly flow.

10. The air conditioning unit according to claim 9, wherein the air conditioning unit includes an indoor unit and an outdoor unit; the indoor unit comprises a plurality of indoor unit units, an indoor air channel is formed in each indoor unit, and the evaporator is arranged in each indoor air channel; the condensing assembly is arranged in the outdoor unit and further comprises a condensing fan and a liquid reservoir, wherein the condensing fan is arranged corresponding to the condenser, and the liquid reservoir is arranged between the condenser and the fluorine pump; and/or the number of the groups of groups,

the second cold source pipeline is further provided with a fluorine injection nozzle, a second pressure sensor and a second temperature sensor, wherein the fluorine injection nozzle is used for injecting the second cold source into the second cold source coil pipe, and the second pressure sensor and the second temperature sensor are respectively used for detecting the pressure and the temperature of the second cold source.