CN219415295U - Heat exchange structure, refrigerating system, refrigerating device and air conditioner - Google Patents

Abstract

The disclosure relates to the technical field of heat exchangers, and in particular relates to a heat exchange structure, a refrigerating system, a refrigerating device and an air conditioner. The heat exchange structure comprises three evaporators which are sequentially connected around a heat exchange fan, namely a first evaporator, a second evaporator and a third evaporator; twelve flow passages are formed in each evaporator, and every two adjacent flow passages are communicated through a first bent pipe or a second bent pipe; the flow channel on the second evaporator is respectively communicated with the flow channel on the first evaporator and the flow channel on the third evaporator through two spanning pipes. The first evaporator, the second evaporator and the third evaporator in the heat exchange structure are connected through the first bent pipe and the second bent pipe to form four passages, and the arrangement mode of the refrigerant flow passages enables the capacity adaptation span of the whole heat exchange structure to be larger, the temperature distribution difference of outlets of the passages is smaller under different working conditions, and the stability of the whole heat exchange structure is better.

Description

Heat exchange structure, refrigerating system, refrigerating device and air conditioner

Technical Field

The disclosure relates to the technical field of heat exchangers, and in particular relates to a heat exchange structure, a refrigerating system, a refrigerating device and an air conditioner.

Background

At present, the heat exchanger for the air conditioner mainly comprises tube fins, and the tube is mainly copper tube. The price of the copper material is not very good, so that the cost of the material is low, and the energy efficiency ratio of the air conditioner is improved; the problems of energy saving consciousness, material consumption saving, production cost and market competitiveness of the air conditioner improvement and the like are promoted in China, and the air conditioner is more outstanding. In recent years, the price of copper materials is continuously rising, so that the cost of the U-shaped copper pipe used for the air conditioner condenser is increased to 95% from 85% in proportion to the total cost of the condenser, and therefore, the reduction of the use amount of copper and the reduction of the material cost are key points of the cost reduction of the condenser.

In the prior art, a condenser structure for an air conditioner is formed by connecting a plurality of U-shaped copper pipes end to end into S-shaped copper pipe units, each U-shaped copper pipe is vertically inserted into an evaporator, and the copper pipes are in tight fit with the evaporator, so that the heat conduction effect is ensured. The commonly used U-shaped copper pipe has the pipe diameters of phi 5mm, phi 7mm, phi 8 and phi 9.5 mm. Due to the rising price of copper pipes, attempts have been made to reduce the diameter of copper pipes in order to save material consumption and increase the market competitiveness of air conditioners at production costs. The small-diameter evaporator can save copper materials, reduce the manufacturing cost of enterprises, and has more obvious cost advantage as the copper price is higher. The heat exchange area in the phi 5 pipe is reduced, and meanwhile, the heat exchange coefficient of the refrigerant side in the pipe is increased and the on-way resistance loss is increased, the heat exchange performance of the heat exchanger can be improved due to the increase of the heat exchange coefficient of the refrigerant side, but the heat exchange performance of the heat exchanger and the energy efficiency of the system can be reduced due to the reduction of the heat exchange area and the increase of the on-way resistance loss of the refrigerant, so that the influence of the small pipe diameter on the heat exchanger of the air conditioner by the air conditioner needs to be comprehensively estimated theoretically. At present, the evaporator with the diameter phi 5 of the split indoor unit is a mainstream trend. How to overcome the defects caused by the application of small pipe diameters of the air conditioner by adjusting the flow direction, the branch number, the flow path arrangement and the like of the air conditioner is a problem to be solved at present.

Disclosure of Invention

In order to solve the technical problem, the present disclosure provides a heat exchange structure, a refrigeration system, a refrigeration device and an air conditioner.

In a first aspect, the present disclosure provides a heat exchange structure, including three evaporators, a first evaporator, a second evaporator, and a third evaporator, connected in sequence around a heat exchange fan;

twelve flow passages are formed in each evaporator, and every two adjacent flow passages are communicated through a first bent pipe or a second bent pipe;

the flow channel on the second evaporator is respectively communicated with the flow channel on the first evaporator and the flow channel on the third evaporator through two spanning pipes;

two of the flow channels on the first evaporator are respectively communicated with a first inlet and a second inlet, and one of the flow channels is communicated with a first outlet; two of the flow passages on the third evaporator are respectively communicated with a third inlet and a fourth inlet, one of the flow passages is communicated with the fourth outlet, and two of the flow passages on the second evaporator are respectively communicated with a second outlet and a third outlet;

the first inlet and the first outlet are communicated through five first bent pipes and four second bent pipes, and a first passage is formed; the second inlet and the second outlet are communicated through four first bent pipes, two second bent pipes and one cross pipe, and form a second passage; the third inlet and the third outlet are communicated through four first bent pipes, two second bent pipes and one cross pipe, and a third passage is formed; the fourth inlet and the fourth outlet are communicated through five first bent pipes and four second bent pipes, and a fourth passage is formed.

Optionally, the refrigerant flowing direction of a part of at least one of the first passage, the second passage, the third passage and the fourth passage forms a set angle with the air inlet direction.

Optionally, a refrigerant flowing direction of a part of at least one of the first passage, the second passage, the third passage and the fourth passage is opposite to an air inlet direction.

Optionally, each evaporator is provided with two rows of runners, the number of each row of runners is six, the extending direction of the evaporator is the same as the extending direction of each row of six runners, the two rows of runners are a first row of runners and a second row of runners respectively, and the first row of runners is located on one side, away from the heat exchange fan, of the second row of runners.

Optionally, the first inlet and the second inlet are respectively communicated with two of the flow passages of the first row of flow passages on the first evaporator;

the third inlet and the fourth inlet are respectively communicated with two flow passages of the first row of flow passages on the third evaporator;

the first outlet is communicated with one of the flow passages of the second row of flow passages on the first evaporator;

the second outlet and the third outlet are respectively communicated with two of the flow passages of the second row of flow passages on the second evaporator;

the fourth outlet communicates with one of the flow passages of the second row of flow passages on the third evaporator.

Optionally, four of the flow channels of the first row of flow channels on the first evaporator and the second row of flow channels on the first evaporator are sequentially communicated to form the first passage, and the four flow channels of the first row of flow channels on the first evaporator are far away from the second evaporator;

two of the flow passages of the first row of flow passages on the first evaporator and six flow passages close to the first evaporator on the second evaporator are sequentially communicated to form the second passage;

two of the flow passages of the first row of flow passages on the third evaporator and six flow passages close to the third evaporator on the second evaporator are sequentially communicated to form the third passage, and two flow passages of the first row of flow passages on the third evaporator are close to the second evaporator;

four of the first flow channels on the third evaporator and the second flow channels on the third evaporator are sequentially communicated to form the fourth passage.

Optionally, the first evaporator and the second evaporator are of an integrated structure, and a bending angle is formed at the joint of the first evaporator and the second evaporator through special-shaped cutting.

In a second aspect, the present disclosure provides a refrigeration system utilizing the heat exchange structure described above.

In a third aspect, the present disclosure provides a refrigeration apparatus utilizing a refrigeration system as described above.

In a fourth aspect, the present disclosure provides an air conditioner using the refrigeration device as described above.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the heat exchange structure provided by the disclosure, wherein four passages are formed on three evaporators of a first evaporator, a second evaporator and a third evaporator through connection of a first bent pipe and a second bent pipe, wherein the first passages occupy ten flow passages on the first evaporator in total, and five first bent pipes and four second bent pipes are used; the second passage occupies two flow passages on the first evaporator and six flow passages on the second evaporator, eight flow passages are all used, and four first bent pipes, two second bent pipes and one cross pipe are used; the third passage occupies six flow passages on the second evaporator and two flow passages on the third evaporator, eight flow passages are all used, and four first bent pipes, two second bent pipes and one cross pipe are used; the fourth passage occupies ten flow passages on the third evaporator, and five first bent pipes and four second bent pipes are used; eighteen first elbows are used in the four paths, six first elbows are respectively arranged on the three evaporators of the first evaporator, the second evaporator and the third evaporator, and the first, second, third and fourth paths occupy five first elbows, four first elbows and five first elbows respectively, so that the arrangement mode of the refrigerant flow path enables the capacity adaptation span of the whole heat exchange structure to be larger, the outlet temperature distribution difference of each path is smaller under different working conditions, the stability of the whole heat exchange structure is better, the arrangement mode of the four paths can not only greatly influence the cost of the heat exchange structure, but also can obviously improve the energy efficiency of the heat exchange structure; and the whole heat exchange structure only has two cross pipes, so that the artificial welding spots in the whole heat exchange structure can be obviously reduced, and the manufacturability of the heat exchange structure is further improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view of a heat exchange structure according to an embodiment of the present disclosure;

FIG. 2 is a schematic illustration of a heat exchange structure in communication with a primary inlet and a primary outlet according to an embodiment of the present disclosure;

FIG. 3 is a side view of a first evaporator and a second evaporator in a heat exchange configuration according to an embodiment of the present disclosure;

fig. 4 is a side view of the other side of fig. 3.

11, a first evaporator; 12. a second evaporator; 13. a third evaporator; 21. a first elbow; 22. a second elbow; 3. crossing pipes; 41. a first passage; 42. a second passage; 43. a third passage; 44. a fourth passage; 51. a first inlet; 52. a second inlet; 53. a third inlet; 54. a fourth inlet; 55. a first outlet; 56. a second outlet; 57. a third outlet; 58. a fourth outlet; 61. a general inlet; 62. and a total outlet.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

At present, the heat exchanger for the air conditioner mainly comprises tube fins, and the tube is mainly copper tube. The price of the copper material is not very good, so that the cost of the material is low, and the energy efficiency ratio of the air conditioner is improved; the problems of energy saving consciousness, material consumption saving, production cost and market competitiveness of the air conditioner improvement and the like are promoted in China, and the air conditioner is more outstanding. In recent years, the price of copper materials is continuously rising, so that the cost of the U-shaped copper pipe used for the air conditioner condenser is increased to 95% from 85% in proportion to the total cost of the condenser, and therefore, the reduction of the use amount of copper and the reduction of the material cost are key points of the cost reduction of the condenser.

In the prior art, a condenser structure for an air conditioner is formed by connecting a plurality of U-shaped copper pipes end to end into S-shaped copper pipe units, each U-shaped copper pipe is vertically inserted into an evaporator, and the copper pipes are in tight fit with the evaporator, so that the heat conduction effect is ensured. The commonly used U-shaped copper pipe has the pipe diameters of phi 5mm, phi 7mm, phi 8 and phi 9.5 mm. Due to the rising price of copper pipes, attempts have been made to reduce the diameter of copper pipes in order to save material consumption and increase the market competitiveness of air conditioners at production costs. The small-diameter evaporator can save copper materials, reduce the manufacturing cost of enterprises, and has more obvious cost advantage as the copper price is higher. The heat exchange area in the phi 5 pipe is reduced, and meanwhile, the heat exchange coefficient of the refrigerant side in the pipe is increased and the on-way resistance loss is increased, the heat exchange performance of the heat exchanger can be improved due to the increase of the heat exchange coefficient of the refrigerant side, but the heat exchange performance of the heat exchanger and the energy efficiency of the system can be reduced due to the reduction of the heat exchange area and the increase of the on-way resistance loss of the refrigerant, so that the influence of the small pipe diameter on the heat exchanger of the air conditioner by the air conditioner needs to be comprehensively estimated theoretically. At present, the evaporator with the diameter phi 5 of the split indoor unit is a mainstream trend. How to overcome the defects caused by the application of small pipe diameters of the air conditioner by adjusting the flow direction, the branch number, the flow path arrangement and other works of the air conditioner is a problem to be solved at present

Based on the above, the present embodiment provides a heat exchange structure, a refrigeration system, a refrigeration device and an air conditioner, wherein four passages are formed on three evaporators of a first evaporator, a second evaporator and a third evaporator in the heat exchange structure by connection of a first elbow and a second elbow, wherein the first passage occupies ten channels on the first evaporator in total, and five first elbows and four second elbows are used; the second passage occupies two flow passages on the first evaporator and six flow passages on the second evaporator, eight flow passages are all used, and four first bent pipes, two second bent pipes and one cross pipe are used; the third passage occupies six flow passages on the second evaporator and two flow passages on the third evaporator, eight flow passages are all used, and four first bent pipes, two second bent pipes and one cross pipe are used; the fourth passage occupies ten flow passages on the third evaporator, and five first bent pipes and four second bent pipes are used; eighteen first elbows are used in the four paths, six first elbows are respectively arranged on the three evaporators of the first evaporator, the second evaporator and the third evaporator, and the first, second, third and fourth paths occupy five first elbows, four first elbows and five first elbows respectively, so that the arrangement mode of the refrigerant flow path enables the capacity adaptation span of the whole heat exchange structure to be larger, the outlet temperature distribution difference of each path is smaller under different working conditions, the stability of the whole heat exchange structure is better, the arrangement mode of the four paths can not only greatly influence the cost of the heat exchange structure, but also can obviously improve the energy efficiency of the heat exchange structure; and the whole heat exchange structure only has two cross pipes, so that the artificial welding spots in the whole heat exchange structure can be obviously reduced, and the manufacturability of the heat exchange structure is further improved. The following is a detailed description of the present utility model by way of specific examples:

referring to fig. 1 to 4, a heat exchange structure provided in this embodiment includes three evaporators, a first evaporator 11, a second evaporator 12 and a third evaporator 13, which are sequentially connected around a heat exchange fan; twelve flow passages are formed in each evaporator, every two adjacent flow passages are communicated through a first bent pipe 21 or a second bent pipe 22, and it is to be understood that the first bent pipe 21 can be a U-shaped copper pipe, the middle part of the first bent pipe 21 is a U-shaped bent pipe, two ends of the first bent pipe are straight pipe structures vertically inserted into the flow passages on the evaporators and are in tension fit with the evaporators, the second bent pipe 22 can be a semicircular copper pipe, and the second bent pipe 22 is used for connecting one port of the first bent pipe 21 and one port of the other first bent pipe 21, so that an S-shaped copper pipe unit is formed by connecting the first bent pipe 21 end to end; the flow channel on the second evaporator 12 is respectively communicated with the flow channel on the first evaporator 11 and the flow channel on the third evaporator 13 through two cross pipes 3;

two of the flow passages on the first evaporator 11 are respectively communicated with the first inlet 51 and the second inlet 52, and one of the flow passages is communicated with the first outlet 55; two of the flow passages on the third evaporator 13 are respectively communicated with the third inlet 53 and the fourth inlet 54, one of the flow passages is communicated with the fourth outlet 58, and two of the flow passages on the second evaporator 12 are respectively communicated with the second outlet 56 and the third outlet 57; the first inlet 51 and the first outlet 55 are communicated through five first bent pipes 21 and four second bent pipes 22, and form a first passage 41; the second inlet 52 and the second outlet 56 are communicated through four first bent pipes 21, two second bent pipes 22 and one cross pipe 3, and form a second passage 42, wherein the cross pipe 3 is used for communicating a flow passage on the first evaporator 11 near the second evaporator 12 and a flow passage on the second evaporator 12 near the first evaporator 11; the third inlet 53 and the third outlet 57 are communicated through four first bent pipes 21, two second bent pipes 22 and one cross pipe 3, and form a third passage 43, wherein the cross pipe 3 is used for communicating a flow passage on the second evaporator 12 near the third evaporator 13 and a flow passage on the third evaporator 13 near the second evaporator 12; the fourth inlet 54 and the fourth outlet 58 communicate through five first elbows 21 and four second elbows 22 and form a fourth passage 44.

Wherein, four passages are formed on three evaporators of the first evaporator 11, the second evaporator 12 and the third evaporator 13 in the heat exchange structure through the connection of the first bent pipe 21 and the second bent pipe 22, wherein the first passage 41 occupies ten flow passages on the first evaporator 11 in total, and five first bent pipes 21 and four second bent pipes 22 are used; the second passage 42 occupies two flow passages on the first evaporator 11 and six flow passages on the second evaporator 12, eight flow passages are all four first bent pipes 21, two second bent pipes 22 and one cross pipe 3; the third passage 43 occupies six channels on the second evaporator 12 and two channels on the third evaporator 13, eight channels are all used, four first bent pipes 21, two second bent pipes 22 and one cross pipe 3; the fourth passage 44 occupies ten channels on the third evaporator 13, and uses five first elbows 21 and four second elbows 22; eighteen first bent pipes 21 are used in total for the four passages, six first bent pipes 21 are respectively arranged on the three evaporators of the first evaporator 11, the second evaporator 12 and the third evaporator 13, and the first passage 41, the second passage 42, the third passage 43 and the fourth passage 44 occupy five first bent pipes 21, four first bent pipes 21 and five first bent pipes 21 respectively; and the whole heat exchange structure only has two cross pipes 3, so that the artificial welding spots in the whole heat exchange structure can be obviously reduced, and the manufacturability of the heat exchange structure is further improved.

It should be noted that, the cross-over pipe 3 is a non-standard component, the first elbow pipe 21 and the second elbow pipe 22 can be standard components, the connection parts of the first elbow pipe 21 and the second elbow pipe 22 can use an automatic welding mode, the cross-over pipe 3 needs to manually complete welding work, one cross-over pipe 3 in the heat exchange structure is used for connecting a flow channel on the first evaporator 11 and a flow channel on the second evaporator 12, and the other cross-over pipe 3 is used for connecting a flow channel on the second evaporator 12 and a flow channel on the third evaporator 13; and the positions of the two flow passages connected with the cross pipe 3 are close to each other, even the two adjacent flow passages, the processing difficulty of the cross pipe 3 is reduced, and the welding difficulty of the cross pipe 3 is also reduced.

Because the stamping end of the stamping machine which performs stamping work on the evaporators to form the flow channels can often stamp out three flow channels simultaneously, twelve flow channels are arranged on the three evaporators and can be more matched with the stamping end of the stamping machine, each evaporator can complete the processing work of the flow channels through four times of stamping work, the subsequent processing difficulty of the evaporators is reduced, and the raw material waste condition can be reduced.

With continued reference to fig. 1, the refrigerant flow direction of at least one of the first passage 41, the second passage 42, the third passage 43, and the fourth passage 44 is set at an angle to the intake air direction; the extending direction of at least one of the first passage 41, the second passage 42, the third passage 43, and the fourth passage 44 has a component in the air intake direction, that is, the extending direction of at least one of the first passage 41, the second passage 42, the third passage 43, and the fourth passage 44 is parallel to the air intake direction, or the extending direction has a component parallel to the air intake direction; this arrangement can significantly improve the cooling efficiency, ensuring that the air is sufficiently cooled.

In some embodiments, the refrigerant flow direction of a portion of at least one of the first passage 41, the second passage 42, the third passage 43, and the fourth passage 44 is opposite to the air intake direction; the arrangement can enable the circulated air to form countercurrent, obviously improve the heat exchange bear rate, and improve the energy consumption efficiency of the whole air conditioner to a certain extent, and the whole air conditioner is more energy-saving in operation.

With continued reference to fig. 1 to 4, each evaporator is provided with two rows of flow passages, the number of each row of flow passages is six, the extending direction of the evaporator is the same as the extending direction of the six flow passages in each row, the two rows of flow passages are respectively a first row of flow passages and a second row of flow passages, and the first row of flow passages are positioned at one side of the second row of flow passages far away from the heat exchange fan; the arrangement of the flow channels can enable the structure of each evaporator to be in a thin plate shape, so that the evaporator is easier to arrange in the air conditioner, and three evaporators are easier to surround the periphery of the heat exchange fan; the overall layout mode is more reasonable, and the space utilization in the air conditioner is also higher.

In some embodiments, the first inlet 51 and the second inlet 52 are in communication with two of the first row of flow passages on the first evaporator 11, respectively; the third inlet 53 and the fourth inlet 54 are respectively communicated with two of the first row of flow passages on the third evaporator 13; the first outlet 55 communicates with one of the second row of flow passages on the first evaporator 11; the second outlet 56 and the third outlet 57 are respectively in communication with two of the second row of flow passages on the second evaporator 12; the fourth outlet 58 communicates with one of the second row of flow passages on the third evaporator 13; that is, the first inlet 51, the second inlet 52, the third inlet 53 and the fourth inlet 54 are located on the first row of flow passages far from the heat exchange fan, and the first outlet 55, the second outlet 56, the third outlet 57 and the fourth outlet 58 are located on the second row of flow passages near to the heat exchange fan, so that the whole flow passage is arranged to further improve the heat exchange efficiency of the whole heat exchange structure, and when the heat exchange structure is used for heating, the first inlet 51, the second inlet 52, the third inlet 53 and the fourth inlet 54 can be exchanged with the first outlet 55, the second outlet 56, the third outlet 57 and the fourth outlet 58, that is, the four flow passages of the first passage 41, the second passage 42, the third passage 43 and the fourth passage 44 are exchanged with each other.

With continued reference to fig. 2, the first inlet 51, the second inlet 52, the third inlet 53 and the fourth inlet 54 may be connected by a pipeline to form a total inlet 61, and the first outlet 55, the second outlet 56, the third outlet 57 and the fourth outlet 58 may also be connected by a pipeline to form a total outlet 62, so as to reduce the occupied volume of the pipeline in the air conditioner and reduce the difficulty of arranging the pipeline.

With continued reference to fig. 1, four of the first row of channels on the first evaporator 11 and the second row of channels on the first evaporator 11 are sequentially communicated to form a first passage 41, four of the first row of channels on the first evaporator 11 are far away from the second evaporator 12, it should be understood that six of the first row of channels on the first evaporator 11 are calculated from the channels adjacent to the second evaporator 12, a third channel facing away from the second evaporator 12 is taken as a first inlet 51 of the first passage 41, the four channels on the first row of channels on the first evaporator 11 are sequentially communicated from the first inlet 51 through the first elbow 21, the second elbow 22 and the first elbow 21, then the channels on the end are communicated with the channels on the end of the second row of channels through the second elbow 22, the channels on the end of the second row of channels far away from the second evaporator 12 are sequentially communicated with the first elbow 21, the second elbow 22, the third channel facing away from the second evaporator 12 is taken as a first inlet 51 of the first passage 41, the first elbow 21, the second elbow 21 and the second elbow 21 are sequentially communicated with the channels on the end of the first evaporator 11 as a second channel 55;

two of the first row of flow channels on the first evaporator 11 and six flow channels on the second evaporator 12 adjacent to the first evaporator 11 are sequentially communicated to form the second passage 42, it should be understood that the six flow channels of the first row of flow channels on the first evaporator 11 are sequentially communicated with the flow channels of the first row of flow channels on the second evaporator 12 toward the end of the first row of flow channels toward the first evaporator 11 through the crossover pipe 3, and sequentially communicated with the four adjacent flow channels of the first row of flow channels on the second evaporator 12 through the first elbow 21, the second elbow 22 and the first elbow 21, and then sequentially communicated with the flow channels of the second row of flow channels on the second evaporator 12 toward the end of the first row of flow channels 11 through the second elbow 21 and the first elbow 21, and sequentially communicated with the four adjacent flow channels of the first row of flow channels on the second evaporator 12 toward the end of the first evaporator 11 through the second elbow 22 and the first elbow 21, and sequentially communicated with the two adjacent flow channels of the first row of flow channels 11 on the second evaporator 12 toward the end of the first evaporator 11 through the second elbow 21 and the first elbow 21;

two of the first row of flow channels on the third evaporator 13 and six of the flow channels on the second evaporator 12 adjacent to the third evaporator 13 are sequentially communicated to form a third passage 43, two of the flow channels on the first row of flow channels on the third evaporator 13 are adjacent to the second evaporator 12, it should be understood that the six of the flow channels on the first row of flow channels on the third evaporator 13, calculated from the flow channels adjacent to the second evaporator 12, are sequentially communicated with the flow channels adjacent to the second evaporator 12 in the first row of flow channels through the first elbow 21, and the end flow channels are sequentially communicated with the flow channels adjacent to the second evaporator 12 in the first row of flow channels through the cross pipe 3, and the flow channels continue to be communicated with the flow channels on the end of the first row of flow channels on the second evaporator 12 through the first elbow 21, the second elbow 22, the first elbow 21, the second elbow 22 and the first elbow 21 so long as the remaining six flow channels on the second evaporator 12 are sequentially communicated with each of the adjacent flow channels on the second row of flow channels 12 as long as the third flow channels 57 are sequentially communicated with each other; it should be noted that, the second evaporator 12 may have three flow passages on the first row of flow passages near the first evaporator 11 and three flow passages on the second row of flow passages near the first evaporator 11 arranged in the second passage 42, or may have two flow passages on the first row of flow passages near the first evaporator 11 and four flow passages on the second row of flow passages near the first evaporator 11 arranged in the second passage 42, and then the third passage 43 only needs to connect the remaining flow passages in series in sequence;

it should be understood that the four channels of the first row of channels on the third evaporator 13 and the second row of channels on the third evaporator 13 are sequentially communicated to form the fourth passage 44, and it should be understood that, as calculated from the channels adjacent to the second evaporator 12, the six channels of the first row of channels on the third evaporator 13, the third channel facing away from the second evaporator 12 serves as the fourth inlet 54 of the fourth passage 44, the four channels of the first row of channels on the third evaporator 13 are sequentially communicated from the fourth inlet 54 toward away from the second evaporator 12 through the first elbow 21, the second elbow 22 and the first elbow 21, then the channel of the end is communicated with the channel of the end of the second row of channels through the second elbow 22, the channel of the end of the second row of channels away from the second evaporator 12 is sequentially communicated with the first elbow 21, the second elbow 22, the first elbow 21, the second elbow 22 and the first elbow 21, the channel of the second row of channels on the first evaporator 11 are sequentially communicated with the channel of the end of the second row of channels of the second evaporator 12, and the channel of the fourth passage 58 serves as the fourth outlet 58.

The four channels which are distributed in this way can obviously improve the heat exchange capacity of the whole heat exchange structure, the design is more reasonable, the capacity adaptation span is larger, according to the data shown in the table 1 and the table 2, the way of the four channels of the heat exchange structure can be intuitively seen, the capacity adaptation span is larger, the temperature distribution difference of outlets of each channel is smaller and the stability is better under different working conditions, the APF of the whole machine is nominal 5.26, and the first-level energy efficiency requirement can be met; meanwhile, the free frequency capability can reach the standard, wherein the free frequency capability refers to the running state of simulating the normal use of the air conditioner by a user under different working conditions, and the higher the free frequency capability is, the better the refrigerating and heating effects of the air conditioner are represented.

Table 1: temperature distribution data of each passage

Table 2: APF measured data

In table 1, steaming 2, steaming 3, and steaming 4 correspond to the position of the first inlet 51, the position of the second inlet 52, the position of the third inlet 53, and the position of the fourth inlet 54, respectively; steam 1, steam 2, steam 3, and steam 4 correspond to the position of the second elbow 22 in the middle of the first passage 41, the position of the second elbow 22 in the middle of the second passage 42, the position of the second elbow 22 in the middle of the third passage 43, and the position of the second elbow 22 in the middle of the fourth passage 44, respectively; the boil-off 1, the boil-off 2, the boil-off 3, and the boil-off 4 correspond to the position of the first outlet 55, the position of the second outlet 56, the position of the third outlet 57, and the position of the fourth outlet 58, respectively. The APF values in table 2 are indicators of the annual energy saving effect of the air conditioner, and the higher the APF values, the more energy saving the air conditioner is represented, wherein when the APF values are greater than 5, the air conditioner is indicated to meet the primary energy efficiency requirement.

With continued reference to fig. 2 to 4, the first evaporator 11 and the second evaporator 12 are integrally formed, and the connection part of the first evaporator 11 and the second evaporator 12 forms a bending angle through special-shaped cutting; because the first evaporator 11 and the second evaporator 12 can meet the arrangement requirement of the two evaporators only by forming an obtuse angle of 130-150 degrees in the actual use environment, the two evaporators can be integrally formed, and then the two evaporators are cut and bent to form a required included angle through special-shaped cutting, and as shown in the figure, the first evaporator 11 can drink the second evaporator 12 to form an included angle of 145.5 degrees; this design also makes the first evaporator 11 and the second evaporator 12 more integrated, which significantly improves the manufacturability of the overall heat exchange structure.

In a second aspect, the present disclosure provides a refrigeration system utilizing the heat exchange structure described above.

In a third aspect, the present disclosure provides a refrigeration apparatus utilizing a refrigeration system as described above.

In a fourth aspect, the present disclosure provides an air conditioner using the refrigeration device as described above. The specific implementation manner and implementation principle are the same as those of the above embodiment, and the same or similar technical effects can be brought, which are not described in detail herein, and specific reference may be made to the description of the above embodiment of the heat exchange structure.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The heat exchange structure is characterized by comprising three evaporators which are sequentially connected around a heat exchange fan, namely a first evaporator (11), a second evaporator (12) and a third evaporator (13);

twelve flow passages are formed in each evaporator, and every two adjacent flow passages are communicated through a first bent pipe (21) or a second bent pipe (22);

the flow channel on the second evaporator (12) is respectively communicated with the flow channel on the first evaporator (11) and the flow channel on the third evaporator (13) through two cross pipes (3);

two of the flow channels on the first evaporator (11) are respectively communicated with a first inlet (51) and a second inlet (52), and one of the flow channels is communicated with a first outlet (55); two of the flow passages on the third evaporator (13) are respectively communicated with a third inlet (53) and a fourth inlet (54), one of the flow passages is communicated with a fourth outlet (58), and two of the flow passages on the second evaporator (12) are respectively communicated with a second outlet (56) and a third outlet (57);

the first inlet (51) and the first outlet (55) are communicated through five first bent pipes (21) and four second bent pipes (22) and form a first passage (41); the second inlet (52) and the second outlet (56) are communicated through four first bent pipes (21), two second bent pipes (22) and one cross pipe (3) and form a second passage (42); the third inlet (53) and the third outlet (57) are communicated through four first bent pipes (21), two second bent pipes (22) and one cross pipe (3) and form a third passage (43); the fourth inlet (54) and the fourth outlet (58) are communicated through five first elbows (21) and four second elbows (22) and form a fourth passage (44).

2. The heat exchange structure according to claim 1, wherein a refrigerant flow direction of a portion of at least one of the first passage (41), the second passage (42), the third passage (43), and the fourth passage (44) is set at an angle to an intake air direction.

3. The heat exchange structure according to claim 2, wherein a refrigerant flow direction of a portion of at least one of the first passage (41), the second passage (42), the third passage (43), and the fourth passage (44) is opposite to an intake air direction.

4. The heat exchange structure according to claim 1, wherein each evaporator is provided with two rows of flow passages, the number of the flow passages in each row is six, the extending direction of the evaporator is the same as the extending direction of the six flow passages in each row, the two rows of flow passages are respectively a first row of flow passages and a second row of flow passages, and the first row of flow passages is located at one side of the second row of flow passages away from the heat exchange fan.

5. The heat exchange structure according to claim 4, wherein the first inlet (51) and the second inlet (52) are respectively in communication with two of the flow passages of the first row of flow passages on the first evaporator (11);

-said third inlet (53) and said fourth inlet (54) are in communication with two of said flow passages of said first row of flow passages on said third evaporator (13), respectively;

-said first outlet (55) communicates with one of said flow passages of said second row of flow passages on said first evaporator (11);

-said second outlet (56) and said third outlet (57) are in communication with two of said flow passages of said second row of flow passages on said second evaporator (12), respectively;

the fourth outlet (58) communicates with one of the flow passages of the second row of flow passages on the third evaporator (13).

6. The heat exchange structure according to claim 5, wherein four of the flow passages of the first row of flow passages on the first evaporator (11) and the second flow passages on the first evaporator (11) are sequentially communicated to form the first passage (41), and four of the flow passages of the first row of flow passages on the first evaporator (11) are located away from the second evaporator (12);

two of the flow passages of the first row of flow passages on the first evaporator (11) and six flow passages, close to the first evaporator (11), on the second evaporator (12) are sequentially communicated to form the second passage (42);

two of the flow passages of the first row of flow passages on the third evaporator (13) and six flow passages, close to the third evaporator (13), on the second evaporator (12) are sequentially communicated to form a third passage (43), and two flow passages, close to the second evaporator (12), of the first row of flow passages on the third evaporator (13);

four of the flow passages of the first row of flow passages on the third evaporator (13) and the second row of flow passages on the third evaporator (13) are sequentially communicated to form the fourth passage (44).

7. The heat exchange structure according to any one of claims 1 to 6, wherein the first evaporator (11) and the second evaporator (12) are of an integral structure, and a connection of the first evaporator (11) and the second evaporator (12) forms a bending angle by special-shaped cutting.

8. A refrigeration system comprising a heat exchange structure as claimed in any one of claims 1 to 7.

9. A refrigeration device comprising the refrigeration system of claim 8.

10. An air conditioner comprising the refrigerating apparatus according to claim 9.