Waste heat recovery device of refrigerating unit

Abstract

The utility model discloses a waste heat recovery device of a refrigerating unit, which belongs to the technical field of energy recovery and utilization and comprises two groups of heat exchange components for heat exchange, the upper heat exchange component is used for primary heat exchange, and the lower heat exchange component is used for secondary heat exchange. The heat exchange assembly comprises a first shell, a second shell, a first installation disc, a second installation disc, installation holes, heat exchange pipes and spiral blades. By means of the mode, the two heat exchange assemblies are adopted, waste heat air exhausted by the refrigerating unit can be utilized twice, waste heat resources are efficiently utilized, meanwhile, the flowing time of the waste heat air in the second shell is prolonged through the spiral blades, favorable conditions are provided for sufficient heat transfer, and the heat exchange efficiency is improved. The spiral blades can guide the waste heat air to be evenly distributed around the heat exchange pipes, so that heat exchange can be fully conducted between each heat exchange pipe and the waste heat air.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy recovery and utilization, specifically relates to a refrigerating unit waste heat recovery device. BACKGROUND

[0002] In the field of modern industry and commercial refrigeration, refrigerating units play a vital role, and are widely used in food refrigeration, chemical process cooling, medicine storage and many other industries. With the continuous growth of global energy demand and the increasing attention to energy utilization efficiency, the energy consumption and waste heat emission of refrigerating units have gradually become the focus of the industry.

[0003] Currently, refrigerating unit technology is continuously developing, and refrigeration efficiency is gradually improving, but a large amount of waste heat is directly discharged into the atmosphere or wasted through cooling water. According to statistics, in a general industrial refrigeration system, the amount of waste heat discharged can account for 30%-50% of the total input energy. In a traditional air-cooled refrigerating unit, a large amount of heat released when gaseous refrigerant is condensed into liquid by a condenser is directly blown into the surrounding air by a fan, and this part of heat is not effectively utilized, resulting in energy waste.

[0004] Traditional technology often only uses a single heat exchange method or a simple heat exchange structure to process the waste heat discharged by the refrigerating unit. In most cases, only one waste heat utilization is performed, and the energy potential of the waste heat cannot be fully tapped. Only hot water of a single temperature can be produced to directly discharge the waste heat, resulting in a large amount of waste heat resources being wasted and low energy recovery efficiency.

[0005] In the heat exchange process of waste heat air and heat exchange medium, the traditional technology lacks effective means to optimize the flow characteristics of the waste heat air. Due to the absence of a design similar to a spiral blade, the flow of the waste heat air in the heat exchange area is relatively disordered, and uniform flow velocity distribution cannot be guaranteed. This makes the flow velocity of the waste heat air around part of the heat exchange pipes too fast, and the heat cannot be fully exchanged before it flows away; and the flow velocity in some areas is too slow, and air stagnation may occur, forming local heat exchange dead zones. This uneven heat exchange seriously affects the overall heat exchange efficiency, resulting in a significant reduction in waste heat recovery effect.

[0006] Based on this, the utility model designs a refrigerating unit waste heat recovery device to solve the above problems. Utility model content

[0007] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and provide a refrigerating unit waste heat recovery device.

[0008] The technical scheme adopted to solve the above technical problems is:

[0009] The application discloses a refrigerating unit waste heat recovery device, which comprises heat exchange assemblies for heat exchange, and two groups of the heat exchange assemblies are arranged in an up-down mode, wherein the upper heat exchange assembly is used for primary heat exchange, and the lower heat exchange assembly is used for secondary heat exchange.

[0010] The heat exchange assembly comprises a first shell, a second shell, a first mounting disc, a second mounting disc, mounting holes, heat exchange pipes and spiral blades, the two groups of the first shells are symmetrically arranged on the two sides of the second shell, the first mounting disc is arranged between the left first shell and the second shell, the left first shell, the first mounting disc and the left end of the second shell are fastened by bolts, the right side surface of the left first shell is in abutment connection with the left side surface of the first mounting disc, the right side surface of the first mounting disc is in abutment connection with the left side surface of the second shell, the second mounting disc is arranged between the right first shell and the second shell, the right first shell, the second mounting disc and the right end of the second shell are fastened by bolts, the left side surface of the right first shell is in abutment connection with the right side surface of the second mounting disc, the left side surface of the second mounting disc is in abutment connection with the right side surface of the second shell, the first mounting disc and the second mounting disc are the same in structure, a plurality of groups of the mounting holes matched with the heat exchange pipes are uniformly formed in the first mounting disc and the second mounting disc, the heat exchange pipes are arranged in a plurality of groups, and the heat exchange pipes pass through the corresponding mounting holes in the first mounting disc and the second mounting disc, and the spiral blades are arranged at the inner end of the second shell and connected with the heat exchange pipes.

[0011] According to the technical scheme, the two heat exchange assemblies are used to utilize the waste heat air discharged from the refrigerating unit twice, the upper heat exchange assembly generates hot water by using the waste heat, the lower heat exchange assembly generates warm water by using the waste heat, the waste heat resource is efficiently utilized, the spiral blades are used to prolong the flow time of the waste heat air in the second shell, and the spiral blades provide favorable conditions for the sufficient heat transfer. The waste heat air and the water in the heat exchange pipes have more time for heat exchange, so that the heat in the waste heat air can be more effectively transferred to the water in the heat exchange pipes, the spiral blades can guide the waste heat air to be uniformly distributed around the heat exchange pipes, the local flow speed is not too fast or too slow, the air flow uniformity of the whole heat exchange region is ensured, and each heat exchange pipe can fully exchange heat with the waste heat air.

[0012] Further, the first air inlet is fixedly arranged at the left upper end of the upper second shell, the first air outlet is fixedly arranged at the right lower end of the upper second shell, the second air inlet is fixedly arranged at the right upper end of the lower second shell, the second air outlet is fixedly arranged at the left lower end of the lower second shell, and the first air outlet and the second air inlet are fixedly connected by bolts.

[0013] Through the technical scheme, the waste heat air enters the upper end heat exchange assembly through the first air inlet to perform first heat exchange and then is discharged from the first air outlet, and enters the lower end heat exchange assembly through the second air inlet to perform second heat exchange, so that the waste heat resource can be efficiently utilized, and energy waste caused by incomplete first utilization is avoided.

[0014] Further, water inlets are fixedly installed on the outer sides of the two groups of first housings on the left side, and water outlets are fixedly installed on the outer sides of the two groups of first housings on the right side.

[0015] Through the technical scheme, cold water is connected to the upper end water inlet, heated to hot water by the upper end heat exchange assembly, and then discharged through the upper end water outlet, and cold water is connected to the lower end water inlet, heated to warm water by the lower end heat exchange assembly, and then discharged through the lower end water outlet.

[0016] Further, the left end of the heat exchange pipe is welded to the first mounting disc after penetrating through the mounting hole of the first mounting disc.

[0017] Through the technical scheme, the left side of the heat exchange pipe is welded to the first mounting disc, and then the right side of the heat exchange pipe is inserted into the second mounting disc, so that the heat exchange pipe is convenient to maintain and clean.

[0018] Further, the outer extension of the spiral blade is slidably connected to the inner side wall of the second housing, a plurality of insertion holes for cooperating with the insertion of the heat exchange pipes are formed in the spiral blade, and the plurality of heat exchange pipes are respectively inserted through the insertion holes of the spiral blade and welded to the spiral blade.

[0019] Through the technical scheme, the spiral blade is slidably connected to the inner wall of the second housing, and then the heat exchange pipe is welded to the spiral blade, so that the spiral blade can be removed together with the heat exchange pipe when the first mounting disc drives the heat exchange pipe to move out for cleaning.

[0020] The beneficial effects of the utility model are as follows: (1) two heat exchange assemblies are adopted to utilize the waste heat air discharged from the refrigerating unit twice, the upper end heat exchange assembly utilizes the waste heat to generate hot water, the lower end heat exchange assembly utilizes the waste heat to generate warm water, the waste heat resource is efficiently utilized, and the spiral blade is adopted to make the flow time of the waste heat air in the second housing longer, which provides favorable conditions for the sufficient heat transfer of the waste heat air and the water in the heat exchange pipe; (2) the spiral blade can guide the waste heat air to be uniformly distributed around the heat exchange pipe, the local flow speed is not too fast or too slow, the air flow uniformity of the whole heat exchange area is guaranteed, and each heat exchange pipe can fully exchange heat with the waste heat air. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1A perspective view of the refrigerating unit waste heat recovery device of the utility model;

[0022] Figure 2 A front view of the refrigerating unit waste heat recovery device of the utility model;

[0023] Figure 3 A left view of the refrigerating unit waste heat recovery device of the utility model;

[0024] Figure 4 It is the A-A direction section view along Figure 3 ;

[0025] Figure 5 It is the schematic diagram of spiral blade;

[0026] Figure 6 It is the schematic diagram of second mounting disc;

[0027] Figure 7 It is the enlarged view of B in Figure 4 ;

[0028] Figure 8 It is the enlarged view of C in Figure 4 .

[0029] Reference signs

[0030] 1, heat exchange assembly; 11, first shell; 12, second shell; 13, water inlet; 14, water outlet; 15, first mounting disc; 16, second mounting disc; 17, mounting hole; 18, heat exchange pipe; 19, spiral blade; 110, plug-in hole; 2, first air inlet; 3, first air outlet; 4, second air inlet; 5, second air outlet. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples.It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0032] In the following description, "left", "right", "front", "back", "up", "down" are oriented with the perspective view.

[0033] Example one: in some examples, referring to the Figures 1-8 , a refrigerating unit waste heat recovery device, comprising heat exchange assembly 1 for heat exchange, heat exchange assembly 1 is arranged in two groups, the heat exchange assembly 1 for primary heat exchange in the upper, the heat exchange assembly 1 for secondary heat exchange in the lower;

[0034] The heat exchange assembly 1 comprises a first shell 11, a second shell 12, a first mounting disc 15, a second mounting disc 16, a mounting hole 17, a heat exchange pipe 18 and a spiral blade 19. The first shell 11 is symmetrically arranged on the two sides of the second shell 12. The first mounting disc 15 is arranged between the left first shell 11 and the second shell 12. The left first shell 11, the first mounting disc 15 and the left end of the second shell 12 are fastened by bolts. The right side surface of the left first shell 11 is connected with the left side surface of the first mounting disc 15. The right side surface of the first mounting disc 15 is connected with the left side surface of the second shell 12. The second mounting disc 16 is arranged between the right first shell 11 and the second shell 12. The right first shell 11, the second mounting disc 16 and the right end of the second shell 12 are fastened by bolts. The left side surface of the right first shell 11 is connected with the right side surface of the second mounting disc 16. The left side surface of the second mounting disc 16 is connected with the right side surface of the second shell 12. The first mounting disc 15 and the second mounting disc 16 are the same in structure. The first mounting disc 15 and the second mounting disc 16 are uniformly provided with a plurality of mounting holes 17 for inserting the heat exchange pipe 18. The heat exchange pipe 18 comprises a plurality of groups. The heat exchange pipe 18 passes through the corresponding mounting holes 17 of the first mounting disc 15 and the second mounting disc 16. The spiral blade 19 is arranged at the inner end of the second shell 12 and connected with the heat exchange pipe 18.

[0035] The outer extension of the spiral blade 19 is connected with the inner side wall of the second shell 12. A plurality of insertion holes 110 are arranged on the spiral blade 19 for inserting the heat exchange pipe 18. The plurality of heat exchange pipes 18 pass through the insertion holes 110 of the spiral blade 19 and are welded with the spiral blade 19.

[0036] The first air inlet 2 is arranged at the left upper end of the upper second shell 12. The first air outlet 3 is arranged at the right lower end of the upper second shell 12. The second air inlet 4 is arranged at the right upper end of the lower second shell 12. The second air outlet 5 is arranged at the left lower end of the lower second shell 12. The first air outlet 3 and the second air inlet 4 are connected by bolts.

[0037] The water inlets 13 are arranged at the outer sides of the two left first shells 11. The water outlets 14 are arranged at the outer sides of the two right first shells 11. The left end of the heat exchange pipe 18 is welded with the first mounting disc 15 after passing through the mounting hole 17 of the first mounting disc 15.

[0038] When this utility model is in use, waste heat air enters the upper second shell 12 from the first air inlet 2, and then cold water enters the heat exchange tube 18 through the upper water inlet 13 and the first shell 11 at the upper water inlet 13. The waste heat air is guided by the spiral blades 19 in the upper heat exchange component 1 to exchange heat with the cold water in the upper heat exchange tube 18. Then the water in the heat exchange tube 18 is heated into hot water and flows into the first shell 11 at the upper water outlet 14, and then is discharged through the upper water outlet 14.

[0039] The waste heat air, after the first heat exchange, is discharged from the first outlet 3 and enters the lower heat exchange component 1 through the second inlet 4. Cold water is introduced into the lower water inlet 13 and enters the heat exchange tube 18 through the first shell 11 at the lower water inlet 13. The spiral blades 19 in the lower heat exchange component 1 guide the waste heat air after the first heat exchange to exchange heat with the cold water in the lower heat exchange tube 18. The water in the heat exchange tube 18 is then heated to warm water and flows into the first shell 11 at the lower outlet 14, and then is discharged through the lower outlet 14. The waste heat air, after the second heat exchange, is discharged from the second outlet 5. The waste heat resources are used to generate hot water at the upper end and warm water at the lower end, respectively. This avoids the situation where some waste heat cannot be effectively utilized due to the use of only a single temperature recovery method, thereby significantly improving the waste heat recovery efficiency.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The above description is merely an embodiment of the present utility model and is not intended to limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A refrigeration unit waste heat recovery device comprising a heat exchanging assembly (1) for performing heat exchange, characterized in that: The heat exchange assembly (1) is arranged in two groups from top to bottom, the upper heat exchange assembly (1) is used for primary heat exchange, and the lower heat exchange assembly (1) is used for secondary heat exchange. The heat exchange assembly (1) comprises a first shell (11), a second shell (12), a first mounting disc (15), a second mounting disc (16), a mounting hole (17), a heat exchange pipe (18) and a spiral blade (19). The first shell (11) is symmetrically arranged on the two sides of the second shell (12). The first mounting disc (15) is arranged between the left first shell (11) and the second shell (12). The left first shell (11), the first mounting disc (15) and the left end of the second shell (12) are fastened by bolts. The right side surface of the left first shell (11) is in abutting connection with the left side surface of the first mounting disc (15). The right side surface of the first mounting disc (15) is in abutting connection with the left side surface of the second shell (12). The second mounting disc (16) is arranged between the right first shell (11) and the second shell (12). The right first shell (11), the second mounting disc (16) and the right end of the second shell (12) are fastened by bolts. The left side surface of the right first shell (11) is in abutting connection with the right side surface of the second mounting disc (16). The left side surface of the second mounting disc (16) is in abutting connection with the right side surface of the second shell (12). The first mounting disc (15) and the second mounting disc (16) are the same in structure. A plurality of mounting holes (17) for inserting the heat exchange pipe (18) are uniformly formed in the first mounting disc (15) and the second mounting disc (16). The heat exchange pipe (18) is provided in multiple groups. The heat exchange pipe (18) passes through the corresponding mounting holes (17) in the first mounting disc (15) and the second mounting disc (16). The spiral blade (19) is mounted at the inner end of the second shell (12) and connected with the heat exchange pipe (18).

2. The chiller unit waste heat recovery apparatus of claim 1, wherein, The first air inlet (2) is fixedly installed at the left upper end of the upper second shell (12). The first air outlet (3) is fixedly installed at the right lower end of the upper second shell (12). The second air inlet (4) is fixedly installed at the right upper end of the lower second shell (12). The second air outlet (5) is fixedly installed at the left lower end of the lower second shell (12). The first air outlet (3) and the second air inlet (4) are fixedly connected by bolts.

3. The chiller unit waste heat recovery apparatus of claim 2, wherein, The water inlets (13) are fixedly installed at the outer sides of the two left first shells (11). The water outlets (14) are fixedly installed at the outer sides of the two right first shells (11).

4. The chiller unit waste heat recovery apparatus of claim 3, wherein, The left end of the heat exchange pipe (18) passes through the mounting hole (17) in the first mounting disc (15) and is welded with the first mounting disc (15).

5. The chiller unit waste heat recovery apparatus of claim 4, wherein, The outer extension of the spiral blade (19) is in sliding connection with the inner side wall of the second shell (12), and a plurality of groups of insertion holes (110) for cooperating with the insertion of the heat exchange pipes (18) are arranged on the spiral blade (19), and the plurality of groups of heat exchange pipes (18) respectively pass through the insertion holes (110) on the spiral blade (19) and are welded with the spiral blade (19).

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