Evaporator

Abstract

The utility model relates to an evaporator which comprises a box body and a fan arranged outside the box body, the fan is communicated with the inside of the box body, a water spraying box is arranged at the top of the box body, an upper fin coil pipe, a secondary water distribution assembly and a lower fin coil pipe are sequentially arranged in the box body in the vertical direction, and an upper air inlet pipe and an upper air outlet pipe are arranged at the two ends of the upper fin coil pipe respectively. The secondary water distribution assembly comprises an upper plate, a lower plate and a side plate, a secondary water distribution cavity is formed between the upper plate and the lower plate, a plurality of first water spraying holes are formed in the upper plate, a plurality of second water spraying holes are formed in the lower plate, and the first water spraying holes and the second water spraying holes are arranged in a staggered mode. According to the utility model, hot gas defrosting and water defrosting are combined, so that the overall defrosting efficiency is improved; and the whole evaporator is divided into areas, regional defrosting is carried out, the actual height of each area is effectively reduced, the situation that the lower edge of the outer side of a fin is not completely defrosted due to the fact that the overall size of the evaporator is too large is avoided, and the defrosting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration systems, in particular to an evaporator. Background Art

[0002] The evaporator is one of the four major components in the refrigeration system, and the evaporator in the quick freezing equipment is generally large in size, which puts higher requirements on the complete defrosting. Water defrosting is generally used in the refrigeration system. With the increasing maturity of high-pressure control valves, more energy-saving hot air defrosting is gradually being used in the refrigeration system. However, in evaporators with a height of more than 1600mm, the use of a single hot air defrost or water defrost will result in incomplete defrosting of the lower fins of the evaporator. For refrigerant evaporators, due to the high refrigerant pressure, it is impossible to solve the problem of incomplete defrosting of the lower fins by using electric heating tubes to assist defrosting.

[0003] When the size of the evaporator is high, the evaporator that uses water defrosting will gradually gather water in the middle of the fins due to the pattern on the fin surface and the arrangement of the tubes. The outer edge of the fin is in contact with the cold environment and cannot be splashed by water, resulting in unclean defrosting at the outer lower edge of the fin, making defrosting difficult. The higher the height of the fin coil, the more serious this situation is.

[0004] Therefore, there is a need for an evaporator that can combine hot air defrosting and water defrosting and perform regional defrosting on the overall divided areas, effectively avoiding unclean defrosting at the lower edge of the outer side of the fin due to excessive size and improving the defrosting effect. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the utility model provides an evaporator.

[0006] The technical solution of the utility model is as follows:

[0007] An evaporator, comprising a box body and a fan arranged outside the box body, the fan is communicated with the inside of the box body, a water spray box is arranged on the top of the box body, an upper fin coil, a secondary water distribution assembly, and a lower fin coil are arranged in sequence in the vertical direction in the box body, an upper air inlet pipe and an upper air outlet pipe are respectively arranged at both ends of the upper fin coil, a lower air inlet pipe and a lower air outlet pipe are respectively arranged at both ends of the lower fin coil, the secondary water distribution assembly comprises an upper plate, a lower plate and a side plate, a secondary water distribution chamber is formed between the upper plate and the lower plate, a plurality of first water spray holes are arranged on the upper plate, a plurality of second water spray holes are arranged on the lower plate, and the first water spray holes and the second water spray holes are arranged in a staggered manner;

[0008] The hot air enters the upper fin coil and the lower fin coil to condense and release heat, melting the frost layer on the upper fin coil and the lower fin coil; the water spray box sprays defrosting water to flush the upper fin coil, and the defrosting water falls on the secondary water distribution component and flushes the lower fin coil.

[0009] As a further improvement of the present invention, the lower fin coil is arranged directly below the second water spray hole (56).

[0010] As a further improvement of the utility model, a plurality of overflow holes are provided on the upper plate, the height of the overflow holes is 5-10 mm, and the hole diameter of the overflow holes is greater than 15 mm.

[0011] As a further improvement of the utility model, an air duct partition is provided below the lower fin coil, a drainage port is provided on the air duct partition, and a water receiving basin is provided below the air duct partition.

[0012] As a further improvement of the utility model, the air duct partition is arranged obliquely, and the drain port is arranged at the lower end of the air duct partition.

[0013] As a further improvement of the utility model, a first heating coil is provided in the secondary water distribution chamber, and a second heating coil is provided on a side of the air duct partition close to the water receiving basin.

[0014] As a further improvement of the present invention, the distance between the first heating coil and the upper plate is L, and the distance between the first heating coil and the lower plate is S, satisfying: L<S.

[0015] As a further improvement of the present invention, at least one first water receiving plate and at least one second water receiving plate are provided on the box body, one end of the first water receiving plate extends to the outer wall of the upper fin coil and contacts the upper fin coil, and one end of the second water receiving plate extends to the outer wall of the lower fin coil and contacts the lower fin coil.

[0016] As a further improvement of the present invention, the first water receiving plate and the second water receiving plate are both arranged on a side of the box away from the fan, and a lap plate is provided between an end of the upper plate close to the fan and the inner wall of the box.

[0017] As a further improvement of the present invention, the first water receiving plate includes a water receiving portion and a drainage portion, the drainage portion connects the upper fin coil and the bottom of the water receiving portion, the upper surface of the water receiving portion is horizontally arranged, and the lower surface of the water receiving portion is inclined downward toward the direction of the upper fin coil; the second water receiving plate has the same structure as the first water receiving plate.

[0018] According to the utility model of the above scheme, the beneficial effects of the utility model are:

[0019] The utility model combines hot air defrosting and water defrosting, thereby improving the overall defrosting efficiency and defrosting effect; and divides the evaporator as a whole into areas and performs regional defrosting, effectively reducing the actual height of each area, avoiding unclean defrosting at the outer lower edge of the fin due to the overall size of the evaporator being too large, and improving the defrosting effect of the outer lower edge of the fin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural sectional view of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the secondary water distribution component and the first water receiving plate of the utility model;

[0023] Figure 4 It is a structural schematic diagram of an upper plate of the utility model.

[0024] In the figure: 1. box body; 2. fan; 3. water spray box; 4. upper fin coil; 41. upper air inlet pipe; 42. upper air outlet pipe; 5. secondary water distribution assembly; 51. upper plate; 52. lower plate; 53. side plate; 54. secondary water distribution chamber; 55. first water spray hole; 56. second water spray hole; 57. overflow hole; 58. first heating coil; 59. lap plate; 6. lower fin coil; 61. lower air inlet pipe; 62. lower air outlet pipe; 7. air duct partition; 8. water receiving basin; 91. first water receiving plate; 92. second water receiving plate; 93. water receiving part; 94. drainage part. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] See also Figure 1 and Figure 2 The utility model provides an evaporator, comprising a box body 1 and a fan 2 arranged outside the box body 1, the fan 2 is connected to the inside of the box body 1, a water spray box 3 is arranged on the top of the box body 1, an upper fin coil 4, a secondary water distribution component 5, and a lower fin coil 6 are arranged in sequence in the vertical direction in the box body 1, an upper air inlet pipe 41 and an upper air outlet pipe 42 are respectively arranged at both ends of the upper fin coil 4, a lower air inlet pipe 61 and a lower air outlet pipe 62 are respectively arranged at both ends of the lower fin coil 6, the secondary water distribution component 5 comprises an upper plate 51, a lower plate 52 and a side plate 53, a secondary water distribution chamber 54 is formed between the upper plate 51 and the lower plate 52, a plurality of first water spray holes 55 are arranged on the upper plate 51, a plurality of second water spray holes 56 are arranged on the lower plate 52, and the first water spray holes 55 and the second water spray holes 56 are staggered;

[0029] The hot air enters the upper air inlet pipe 41 and the lower air inlet pipe 61, condenses and releases heat in the upper fin coil 4 and the lower fin coil 6 respectively, and liquefies into liquid and flows out from the upper air outlet pipe 42 and the lower air outlet pipe 62, melting the frost layer on the upper fin coil 4 and the lower fin coil 6; the water spraying box 3 sprays defrosting water to flush and defrost the upper fin coil 4, the defrosting water falls on the upper plate 51 and accumulates in the secondary water distribution chamber 54, and the defrosting water flows down from the second water spraying hole 56 to flush and defrost the lower fin coil 6. The utility model combines hot air defrosting and water defrosting. After the upper fin coil 4 and the lower fin coil 6 are defrosted by hot air, the upper fin coil 4 and the lower fin coil 6 are flushed and defrosted with defrosting water, thereby improving the overall defrosting efficiency and defrosting effect. Moreover, by arranging a secondary water-dividing component 5, the housing 1 is divided into an upper and a lower part, that is, the evaporator is divided into regions as a whole and regional defrosting is performed, thereby effectively reducing the actual height of each region, thereby avoiding unclean defrosting of the lower edge of the outer side of the fin due to the oversized overall size of the evaporator, thereby effectively improving the defrosting effect of the lower edge of the outer side of the fin. At the same time, the ultra-high evaporator is divided into an upper and a lower part, thereby making the original ultra-large fin coil replaced by an upper fin coil 4 and a lower fin coil 6 of small size, thereby reducing the difficulty of design and production and reducing the cost of use.

[0030] See also Figure 3 As an embodiment of the utility model, the lower fin coil 6 is arranged directly below the second water spray hole 56, so that the defrosting water flowing out of the second water spray hole 56 can all flow onto the lower fin coil 6, which can more accurately and evenly flush and defrost the lower fin coil 6, effectively improving the defrosting effect on the lower fin coil 6.

[0031] See also Figure 3 and Figure 4As an embodiment of the present invention, the upper plate 51 is provided with a plurality of overflow holes 57. When the defrosting water flow is too large, the defrosting water can quickly flow from the overflow holes 57 to the secondary water distribution chamber 54 to avoid excessive defrosting water accumulating on the upper plate 51. Similarly, the lower plate 52 is provided with a plurality of overflow holes 57. When the defrosting water flow is moderate, the defrosting water accumulates on the lower plate 52 to form a water film, which can ensure that the lower fin coil 6 below is evenly flushed and improve the working stability. When the defrosting water flow is too large, the defrosting water can be discharged from the overflow holes 57 to prevent excessive water from accumulating in the secondary water distribution chamber 54 and overflowing the evaporator; preferably, the opening position of the overflow hole 57 is within the range of the lower fin coil 6, so that the defrosting water flowing out of the overflow hole 57 can flow to the lower fin coil 6 to avoid the ineffective flow of the defrosting water. The overflow hole 57 adopts an upward turning The side hole is in the form of a certain height, and the height of the overflow hole 57 is less than the height of the side plate 53. Preferably, the height of the overflow hole is 5-10 mm, and the aperture of the overflow hole 57 is larger than the aperture of the first sprinkler hole 55 and the second sprinkler hole 56. Preferably, the aperture of the overflow hole 57 is greater than 15 mm. The number of overflow holes 57 can be designed according to specific usage requirements, and the overflow holes 57 are evenly distributed on the upper plate 51 and the lower plate 52. Preferably, 4 overflow holes 57 are provided on the upper plate 51, and 4 overflow holes 57 are provided on the lower plate 52. Preferably, the overflow holes 57 on the upper plate 51 correspond to the overflow holes 57 on the lower plate 52 one by one. When the defrosting water flow is too large, the defrosting water is directly discharged through the overflow holes 57 on the upper plate 51 and the overflow holes 57 on the lower plate 52 in turn and flushes and defrosts the lower fin coil 6, thereby further improving the drainage efficiency.

[0032] As an embodiment of the utility model, a duct partition plate 7 is provided below the lower fin coil 6, a drain port is provided on the duct partition plate 7, and a water receiving basin 8 is provided below the duct partition plate 7. The defrosting water used to flush the upper fin coil 4 and the lower fin coil 6 falls onto the duct partition plate 7, is finally collected in the water receiving basin 8 through the drain port and is discharged from the evaporator.

[0033] Preferably, the air duct partition 7 is arranged obliquely, and the drain port is arranged at the lower end of the air duct partition 7. The defrosting water falling on the air duct partition 7 flows quickly to the drain port under the action of its own gravity, thereby improving the collection efficiency of the defrosting water.

[0034] As an embodiment of the utility model, a first heating coil 58 is provided in the secondary water distribution chamber 54, which can heat and raise the temperature of the upper plate 51, the lower plate 52 and the secondary water distribution chamber 54 to prevent the defrosting water from freezing on the upper plate 51 and the lower plate 52. A second heating coil is provided on the side of the air duct partition 7 close to the water receiving basin 8, which can heat and raise the temperature of the internal space of the air duct partition 7 and the water receiving basin 8 to prevent the defrosting water on the air duct partition 7 and the defrosting water in the water receiving basin 8 from freezing.

[0035] Preferably, the distance between the first heating coil 58 and the upper plate 51 is L, and the distance between the first heating coil 58 and the lower plate 52 is S, satisfying:

[0036] L<S;

[0037] Preferably, the distance between the first heating coil 58 and the lower plate 52 is greater than the height of the overflow hole 57. This can improve the heating efficiency of the first heating coil 58 on the upper plate 51 while preventing the first heating coil 58 from being immersed in defrosting water accumulated on the lower plate 52 and affecting the heat dissipation effect of the first heating coil 58.

[0038] As an embodiment of the present invention, at least one first water receiving plate 91 and at least one second water receiving plate 92 are provided on the box body 1, one end of the first water receiving plate 91 extends to the outer wall of the upper fin coil 4 and contacts the upper fin coil 4, and the defrosting water splashed from the upper fin coil 4 can fall on the first water receiving plate 91, and return to the upper fin coil 4 through the drainage function, and finally collect on the upper plate 51 together with the conventional defrosting water; one end of the second water receiving plate 92 extends to the outer wall of the lower fin coil 6 and contacts the lower fin coil 6, and the defrosting water splashed from the lower fin coil 6 can fall on the second water receiving plate 92, and return to the lower fin coil 6 through the drainage function, and finally collect on the air duct partition 7 together with the conventional defrosting water, the first water receiving plate 91 and the second water receiving plate 92 can prevent the internal environment of the evaporator from being humid due to the splashing of defrosting water, improve the stability and reliability of the work, and at the same time avoid the waste of defrosting water, improve the use efficiency of defrosting water, and save the use cost.

[0039] As an embodiment of the utility model, the first water receiving plate 91 and the second water receiving plate 92 are both arranged on the side of the box body 1 away from the fan 2, and a lap plate 59 is provided between the end of the upper plate 51 close to the fan 2 and the inner wall of the box body 1. The function of the lap plate 59 is similar to that of the first water receiving plate 91, and both are used to collect the splashed defrosting water onto the upper plate 51.

[0040] As an embodiment of the utility model, the first water receiving plate 91 includes a water receiving portion 93 and a drainage portion 94, the drainage portion 94 connects the upper fin coil 4 and the bottom of the water receiving portion 93, the upper surface of the water receiving portion 93 is horizontally arranged, and the lower surface of the water receiving portion 93 is inclined downwardly arranged toward the upper fin coil 4, and the defrosting water falling on the water receiving portion 93 can flow back to the upper fin coil 4 along the drainage portion 94 from the end close to the upper fin coil 4, or flow back to the upper fin coil 4 along the lower surface from the end far away from the upper fin coil 4; the second water receiving plate 92 has the same structure as the first water receiving plate 91.

[0041] In summary, the utility model provides an evaporator, which combines hot air defrosting and water flushing. After the upper fin coil 4 and the lower fin coil 6 are defrosted by hot air, the upper fin coil 4 and the lower fin coil 6 are flushed and defrosted with defrosting water, thereby improving the overall defrosting efficiency and defrosting effect; and by arranging a secondary water-dividing component 5, the box body 1 is divided into an upper and a lower part, that is, the evaporator is divided into regions as a whole and regional defrosting is performed, which effectively reduces the actual height of each region, can avoid the problem of unclean defrosting of the lower edge of the outer side of the fin due to the excessive size of the overall evaporator, and effectively improves the defrosting effect of the lower edge of the outer side of the fin; at the same time, the ultra-high evaporator is divided into an upper and a lower part design, so that the original ultra-large fin coil is replaced by a small-sized upper fin coil 4 and a lower fin coil 6, which reduces the difficulty of design and production and reduces the cost of use; the lower fin coil 6 is arranged in the second water-spraying hole 56 , can more accurately and evenly flush and defrost the lower fin coil 6, effectively improving the defrosting effect of the lower fin coil 6; when the defrosting water flow is too large, the defrosting water can be discharged from the overflow hole 57 to prevent excessive water from accumulating in the secondary water distribution chamber 54 and overflowing the evaporator; the first heating coil 58 can heat and raise the temperature of the upper plate 51, the lower plate 52 and the secondary water distribution chamber 54 to prevent the defrosting water from freezing on the upper plate 51 and the lower plate 52; the second heating coil can heat and raise the temperature of the internal space of the air duct partition 7 and the water receiving basin 8 to prevent the defrosting water on the air duct partition 7 and the defrosting water in the water receiving basin 8 from freezing; the first water receiving plate 91 and the second water receiving plate 92 can prevent the defrosting water from splashing and causing the internal environment of the evaporator to be humid, improve the stability and reliability of the work, and at the same time avoid the waste of defrosting water, improve the use efficiency of defrosting water, and save the use cost.

[0042] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An evaporator, characterized in that: The invention comprises a box body (1) and a fan (2) arranged outside the box body (1), the fan (2) being connected to the inside of the box body (1), a water spray box (3) being arranged on the top of the box body (1), an upper finned coil (4), a secondary water distribution component (5), and a lower finned coil (6) being arranged in sequence in the vertical direction inside the box body (1), an upper air inlet pipe (41) and an upper air outlet pipe (42) being respectively arranged at both ends of the upper finned coil (4), and a lower finned coil (6) being respectively arranged at both ends of the lower finned coil (6). A lower air inlet pipe (61) and a lower air outlet pipe (62) are provided, the secondary water distribution component (5) comprises an upper plate (51), a lower plate (52) and a side plate (53), a secondary water distribution chamber (54) is formed between the upper plate (51) and the lower plate (52), a plurality of first water spray holes (55) are provided on the upper plate (51), a plurality of second water spray holes (56) are provided on the lower plate (52), and the first water spray holes (55) and the second water spray holes (56) are staggered; The hot air enters the upper fin coil (4) and the lower fin coil (6) to condense and release heat, melting the frost layer on the upper fin coil (4) and the lower fin coil (6); the water spraying box (3) sprays defrosting water to flush the upper fin coil (4), and the defrosting water falls on the secondary water distribution component (5) and flushes the lower fin coil (6).

2. The evaporator according to claim 1, characterized in that The lower fin coil (6) is arranged directly below the second water spray hole (56).

3. The evaporator according to claim 2, characterized in that The upper plate (51) is provided with a plurality of overflow holes (57), the height of the overflow holes (57) is 5-10 mm, and the hole diameter of the overflow holes (57) is greater than 15 mm.

4. The evaporator according to claim 1, characterized in that An air duct partition (7) is provided below the lower fin coil (6), a drainage port is provided on the air duct partition (7), and a water receiving basin (8) is provided below the air duct partition (7).

5. The evaporator according to claim 4, characterized in that The air duct partition plate (7) is arranged obliquely, and the drainage port is arranged at the lower end of the air duct partition plate (7).

6. The evaporator according to claim 5, characterized in that A first heating coil (58) is provided in the secondary water distribution chamber (54), and a second heating coil is provided on a side of the air duct partition (7) close to the water receiving basin (8).

7. The evaporator according to claim 6, characterized in that The distance between the first heating coil (58) and the upper plate (51) is L, and the distance between the first heating coil (58) and the lower plate (52) is S, satisfying: L<S.

8. The evaporator according to claim 1, characterized in that The box body (1) is provided with at least one first water receiving plate (91) and at least one second water receiving plate (92), one end of the first water receiving plate (91) extends to the outer wall of the upper fin coil (4) and contacts the upper fin coil (4), and one end of the second water receiving plate (92) extends to the outer wall of the lower fin coil (6) and contacts the lower fin coil (6).

9. The evaporator according to claim 8, characterized in that The first water receiving plate (91) and the second water receiving plate (92) are both arranged on a side of the box body (1) away from the fan (2), and a lap plate (59) is provided between an end of the upper plate (51) close to the fan (2) and an inner wall of the box body (1).

10. The evaporator according to claim 8, characterized in that The first water receiving plate (91) comprises a water receiving portion (93) and a drainage portion (94), wherein the drainage portion (94) connects the upper fin coil (4) and the bottom of the water receiving portion (93), the upper surface of the water receiving portion (93) is arranged horizontally, and the lower surface of the water receiving portion (93) is arranged inclined downward in the direction of the upper fin coil (4); the second water receiving plate (92) has the same structure as the first water receiving plate (91).

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