Air-cooled horizontal refrigerator

Abstract

The application provides a forced air cooling horizontal refrigerator, comprising a cabinet and a refrigeration system arranged in the cabinet, the cabinet is provided with a refrigeration chamber with a top opening, an evaporator chamber arranged close to the bottom of the refrigeration chamber and communicated with the refrigeration chamber, the refrigeration system comprises an evaporator for refrigerating the refrigeration chamber, the evaporator comprises a refrigeration evaporator and an auxiliary evaporator arranged in parallel, the refrigeration evaporator is arranged in the evaporator chamber, and the auxiliary evaporator is at least partially arranged at a position close to the top opening of the cabinet. Cold quantity is provided for the refrigeration chamber by the auxiliary evaporator when the heating wire defrosts.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to an air-cooled horizontal freezer. Background Technology

[0002] During prolonged operation, frost will condense on the surface of the evaporator in a wind-cooled horizontal freezer, requiring defrosting. The current defrosting procedure is as follows: during defrosting, the fan is turned off, the defrosting heating element is activated, and the defrosting program exits once the preset defrosting temperature is reached.

[0003] When the defrosting heating wire is in use, it causes significant temperature fluctuations inside the oven. Due to the large amount of heat radiation, food melts and softens, and water droplets form on the surface. Repeated thawing and defrosting of food leads to moisture loss and a deterioration in texture. For some temperature-sensitive ingredients, such as salmon, large temperature changes can cause surface spoilage, severely affecting the overall quality and resulting in waste. Summary of the Invention

[0004] The purpose of this application is to provide an air-cooled horizontal freezer with an auxiliary evaporator installed near the top of the cabinet. When the heating wire defrosts, the auxiliary evaporator can be used to prevent the temperature of the refrigeration compartment from rising, thus solving the problem in the prior art where the temperature of the refrigeration compartment rises during defrosting, causing the food to deteriorate in taste or even spoil.

[0005] To achieve one of the above-mentioned objectives, one embodiment of this application provides an air-cooled horizontal freezer, including a cabinet and a refrigeration system disposed within the cabinet. The cabinet has a refrigeration compartment with a top opening and an evaporator compartment disposed near the bottom of the refrigeration compartment and communicating with the refrigeration compartment. The refrigeration system includes an evaporator for cooling the refrigeration compartment. The evaporator includes a refrigeration evaporator and an auxiliary evaporator disposed in parallel. The refrigeration evaporator is disposed in the evaporator compartment, and the auxiliary evaporator is at least partially disposed near the top opening of the cabinet.

[0006] In one embodiment of this application, the air-cooled horizontal freezer further includes an air duct connecting the evaporator chamber and the refrigeration chamber, the air duct having a first air outlet communicating with the refrigeration chamber, the first air outlet being close to the opening at the top of the cabinet; the position of the auxiliary evaporator is defined such that its cold radiation range is at least partially located within the path of the cold air blown out from the first air outlet.

[0007] In one embodiment of this application, the housing further includes an inner liner, the inner liner including a first sidewall and a second sidewall disposed opposite to each other, the air duct being disposed on the first sidewall, and the auxiliary evaporator being disposed at least partially against the second sidewall.

[0008] In one embodiment of this application, the inner liner further includes a bottom wall and a boss protruding upward from one end of the bottom wall; The air-cooled horizontal freezer also includes an L-shaped evaporator chamber cover, which is located above the boss and surrounds the inner liner to form the evaporator chamber.

[0009] In one embodiment of this application, the inner liner further includes a third sidewall connected to the first sidewall and the second sidewall, and the auxiliary evaporator includes an evaporation vertical tube and an evaporation horizontal tube. The evaporation vertical tube is attached to the third sidewall and extends upward to the top, and the evaporation horizontal tube extends from the top of the evaporation vertical tube to the second sidewall and extends along the length direction of the second sidewall.

[0010] In one embodiment of this application, the air-cooled horizontal freezer further includes a fan assembly that communicates with the evaporator chamber. The fan assembly is disposed against the first side wall and communicates with the air duct.

[0011] In one embodiment of this application, a return air inlet is provided on the evaporator chamber cover plate, and the refrigeration evaporator is disposed between the return air inlet and the fan assembly in the direction from the first side wall to the second side wall.

[0012] In one embodiment of this application, the evaporator chamber cover plate includes a side plate and a top plate, and the return air inlet includes a side return air inlet and a top return air inlet corresponding to the side plate and the top plate. The top plate extends upward and is provided with a plurality of protrusions, and the top return air inlet is provided on the side of the protrusions. The side plate is provided with a plurality of ribs, and the side return air inlet is provided between adjacent ribs.

[0013] In one embodiment of this application, the air-cooled horizontal freezer further includes a heating wire, which is disposed in the evaporator chamber for defrosting the evaporator. The refrigeration evaporator includes several evaporation fins and evaporation tubes connected to the evaporation fins. Some of the evaporation fins are also provided with mounting grooves, and the heating wire is installed in the mounting grooves.

[0014] In one embodiment of this application, the refrigeration system further includes a diverting valve, which is disposed at the front end of the evaporator and is used to control the flow of refrigerant to the refrigeration evaporator or the auxiliary evaporator.

[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages: The air-cooled horizontal freezer provided in this application divides the refrigeration compartment into a refrigeration evaporator and an auxiliary evaporator. The refrigeration evaporator can refrigerate the refrigeration compartment under normal refrigeration conditions, while the auxiliary evaporator can be activated when the heating wire is defrosting, thus avoiding the temperature rise in the refrigeration compartment when the heating wire is defrosting. Furthermore, the auxiliary evaporator is at least partially located at the opening at the top of the cabinet, so that the cold air sinks under the action of gravity, avoiding proximity to the evaporator compartment and reducing the defrosting efficiency of the heating wire. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the air-cooled horizontal freezer in the embodiments of this application.

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of a horizontal freezer after the outer shell has been removed.

[0018] Figure 3 This is a schematic diagram showing the combination of the refrigeration evaporator and the heating wire.

[0019] Figure 4 yes Figure 1 A top view of a horizontal freezer.

[0020] Figure 5 yes Figure 4 Schematic diagram of cross section along line AA.

[0021] Figure 6 yes Figure 1 A schematic diagram of the structure of the central ventilation duct cover.

[0022] Figure 7 yes Figure 1 A schematic diagram of the structure of the evaporator chamber cover.

[0023] Figure 8 This is a schematic diagram of a refrigeration system.

[0024] 100. Box body; 1. Inner liner; 10. Refrigeration compartment; 11. First side wall; 12. Second side wall; 13. Third side wall; 14. Bottom wall; 15. Boss; 2. Outer shell; 31. Refrigeration evaporator; 311. Evaporator fins; 3111. Mounting slot; 312. Evaporator tube; 32. Auxiliary evaporator; 321. Evaporator vertical tube; 322. Evaporator horizontal tube; 33. S-tube; 34. Diverting valve; 35. Compressor; 36. Condenser; 37. Throttling device; 4. Heating wire; 5. Evaporator chamber cover; 50. Evaporator chamber; 51. Top plate; 511. Protrusion; 5111. Top return air vent; 52. Side plate; 521. Rib; 522. Side return air vent; 523. Air guide rib; 6. Air duct cover; 60. Air duct; 61. Volute; 62. First air duct plate; 621. First air outlet; 63. Second air duct plate; 631. Second air outlet. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] The terms used in this document, such as “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” indicating spatial relative positions, are used for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative positions” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0027] For example, if the device in the figure is flipped, a unit described as being "below" or "under" other units or features will be "above" other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise), and the spatially related descriptive terms used herein will be interpreted accordingly.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe various elements or structures, the objects described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first wireless communication device may be referred to as a second wireless communication device, and similarly, a second wireless communication device may be referred to as a first wireless communication device, without departing from the scope of protection of this application.

[0030] This application provides an air-cooled horizontal freezer, such as... Figures 1-7As shown, the device includes a housing and a refrigeration system disposed within the housing. The housing has a refrigeration chamber 10 with a top opening and an evaporator chamber 50 disposed near the bottom of the refrigeration chamber 10 and communicating with the refrigeration chamber 10. The refrigeration system includes an evaporator for refrigerating the refrigeration chamber 10. The evaporator includes a refrigeration evaporator 31 and an auxiliary evaporator 32 disposed in parallel. The refrigeration evaporator 31 is disposed within the evaporator chamber 50, and the auxiliary evaporator 32 is at least partially disposed near the top opening of the housing.

[0031] In this application, the evaporator is configured as a refrigeration evaporator 31 and an auxiliary evaporator 32. The refrigeration evaporator 31 operates during normal refrigeration to provide cooling capacity to the refrigeration chamber 10. The air-cooled horizontal freezer also includes a heating wire 4, which is located inside the evaporator chamber 50 and is used to defrost the refrigeration evaporator 31.

[0032] When the evaporator 31 has been working for a long time and the frost is thick enough to require defrosting, the heating wire 4, which is also located in the evaporator chamber 50, is turned on, and the evaporator 31 is turned off to begin defrosting. At this time, the auxiliary evaporator 32 is working, at least partially located near the top of the cabinet, to provide cooling to the refrigeration chamber 10. The cold air sinks under the influence of gravity, preventing the heat generated by the heating wire 4 from being transferred into the refrigeration chamber 10, which would raise the temperature inside the refrigeration chamber 10 and affect the preservation of the food inside.

[0033] Furthermore, since the evaporator chamber 50 is located on the bottom wall 14 of the refrigeration chamber 10, the cooling capacity of the auxiliary evaporator 32 can be prevented from approaching the evaporator chamber 50 and affecting the defrosting efficiency of the heating wire 4.

[0034] In some embodiments of this application, such as Figure 8 The refrigeration system also includes a diverting valve 34, which is located at the front end of the evaporator and is used to control the flow of refrigerant to the refrigeration evaporator 31 or the auxiliary evaporator 32.

[0035] As is known, the refrigeration system includes a compressor 35, a condenser 36, a throttling device 37 and an evaporator connected in sequence. In this application, a diverting valve 34 is also provided at the front end of the evaporator. The diverting valve 34 is also connected to the refrigeration evaporator 31 and the auxiliary evaporator 32 to control the flow of refrigerant to the refrigeration evaporator 31 or the auxiliary evaporator 32, so as to realize the parallel connection of the refrigeration evaporator 31 and the auxiliary evaporator 32.

[0036] During normal cooling, the diverting valve 34 controls the refrigerant flow to the evaporator 31. When the evaporator 31 is closed and the heating wire 4 is turned on for defrosting, the diverting valve 34 controls the refrigerant flow to the auxiliary evaporator 32, so that the auxiliary evaporator 32 provides cooling capacity to the cooling room 10 and prevents the temperature of the cooling room 10 from rising.

[0037] In some embodiments of this application, the heating wire 4 is disposed close to the evaporator 31. On the one hand, this close proximity / zero distance allows for rapid defrosting; on the other hand, the metal evaporator 31 facilitates heat transfer, resulting in fast heat transfer, minimal heat loss, and rapid melting of frost layers at locations farther from the heating wire 4, thus improving defrosting efficiency.

[0038] In some embodiments of this application, the refrigeration evaporator 31 includes a plurality of evaporation fins 311 and an evaporation tube 312 connected to the evaporation fins 311. Some of the evaporation fins 311 are also provided with mounting grooves 3111, and the heating wire 4 is mounted in the mounting grooves 3111.

[0039] Evaporation tubes 312 are evenly spaced and inserted into evaporation fins 311. At the same time, heating wires 4 are also connected to evaporation fins 311 through mounting grooves 3111. When heating wires 4 heat, heat is transferred to evaporation tubes 312 through evaporation fins 311, melting the frost layer on evaporation fins 311 and evaporation tubes 312.

[0040] like Figure 3 In the middle, the top and bottom of the evaporator fin 311 are provided with semi-circular mounting grooves 3111. The heating wire 4 is arranged in an S-shape at the top of the evaporator fin 311 and then extends downward to continue to be arranged in an S-shape at the bottom of the evaporator fin 311, so as to transfer heat from the top and bottom to the middle, which greatly improves the defrosting efficiency.

[0041] In addition, placing the heating wire 4 at the top and bottom of the evaporation fins 311 can also avoid the evaporation tube 312 and prevent the two from conflicting in position.

[0042] In some embodiments of this application, the air-cooled horizontal freezer further includes an air duct 60 connecting the evaporator chamber 50 and the refrigeration chamber 10. The air duct 60 has a first air outlet 621 communicating with the refrigeration chamber 10. The first air outlet 621 is close to the opening at the top of the cabinet. The position of the auxiliary evaporator 32 is defined such that its cold radiation range is at least partially located within the path of the cold air blown out of the first air outlet 621.

[0043] The cabinet includes an inner liner 1, an outer shell 2, and an insulation layer disposed between the inner liner 1 and the outer shell 2. An auxiliary evaporator 32 is disposed in the insulation layer on the side of the inner liner 1 away from the cooling chamber 10 and is in close contact with the inner liner 1 so that the cooling energy is transferred to the cooling chamber 10 through the inner liner 1 and is prevented from being transferred to the outside by the insulation layer.

[0044] Since the auxiliary evaporator 32 is at least partially located near the top opening of the cabinet, it is a direct-cooling type. If the door is opened during defrosting, outside air enters and meets the cold air from the auxiliary evaporator 32 at the top of the cabinet, frost is likely to form at the location where the auxiliary evaporator 32 is located on the top of the inner liner 1.

[0045] If the cooling radiation range of the auxiliary evaporator 32 is within the cold air path of the first air outlet 621, under normal cooling conditions, the cold air blown out by the first air outlet 621 can remove the frost layer on the inner liner 1 of the cooling chamber 10, thus preventing frost from forming on the top of the inner liner 1.

[0046] In some embodiments of this application, the inner liner 1 includes a first sidewall 11 and a second sidewall 12 disposed opposite to each other, the air duct 60 is disposed on the first sidewall 11, and the auxiliary evaporator 32 is disposed at least partially against the second sidewall 12.

[0047] The first sidewall 11 and the second sidewall 12 are the longer sidewalls of the air-cooled horizontal freezer. The distance between the relatively set first sidewall 11 and the second sidewall 12 is small, thereby ensuring that the cold air blown out of the first air outlet 621 can reach the second sidewall 12 and remove the frost layer on it.

[0048] In some embodiments of this application, the inner liner 1 further includes a bottom wall 14 and a boss 15 protruding upward from one end of the bottom wall 14; the air-cooled horizontal freezer further includes an L-shaped evaporator chamber cover 5, which is disposed above the boss 15 and together with the inner liner 1 to form an evaporator chamber 50.

[0049] The inner liner 1 also includes a third sidewall 13 connected to the first sidewall 11 and the second sidewall 12, and the bottom of the third sidewall 13 is connected to the boss 15. The boss 15 is arranged such that the bottom wall 14 of the inner liner 1 is divided into a part of the upper surface of the boss 15 and a part below the boss 15, and the evaporator chamber cover 5 is disposed above the boss 15. The L-shaped structure, together with the first sidewall 11, the second sidewall 12, the third sidewall 13 and the top of the boss 15, forms the aforementioned evaporator chamber 50.

[0050] The first sidewall 11 has a receiving cavity with an opening facing the refrigeration chamber 10 extending outward from the side opposite to the refrigeration chamber 10. The receiving cavity is connected to the evaporator chamber 50. The refrigeration equipment also includes a duct cover plate 6, which covers the opening of the receiving cavity to form the aforementioned duct 60.

[0051] like Figure 6 In the middle, the air duct cover plate 6 includes a volute 61 for accommodating the fan, a first air duct plate 62 connected to the top of the volute 61, and a second air duct plate 63 connected to the side of the volute 61. The first air duct plate 62 extends upward from the top of the volute 61 to the top of the refrigeration compartment 10, and then extends away from the boss 15 along the length direction of the air-cooled horizontal freezer, so that the first air duct plate 62 is L-shaped.

[0052] The second air duct plate 63 extends downwards at an angle from the side of the volute 61 to the bottom of the refrigeration compartment 10, and then extends along the length of the air-cooled horizontal freezer in a direction away from the boss 15. The first air duct plate 62 has the aforementioned first air outlet 621, which is used to blow the cold air generated by the evaporator 31 in the evaporator chamber 50 towards the refrigeration compartment 10. The second air duct plate 63 is provided with a second air outlet 631, which also blows the cold air towards the bottom of the refrigeration compartment 10.

[0053] In some embodiments of this application, the auxiliary evaporator 32 includes an evaporation vertical tube 321 and an evaporation horizontal tube 322. The evaporation vertical tube 321 is attached to the third side wall 13 and extends upward to the top. The evaporation horizontal tube 322 extends from the top of the evaporation vertical tube 321 to the second side wall 12 and extends along the length direction of the second side wall 12.

[0054] The evaporator riser 321 extends from bottom to top of the third side wall 13, and the cooling energy it generates can also be radiated into the cooling chamber 10 through the third side wall 13.

[0055] The evaporator horizontal tube 322 is L-shaped, partially abutting the top of the third side wall 13 and partially abutting the top of the second side wall 12. The extension length of the evaporator horizontal tube 322 on the second side wall 12 is consistent with the extension length of the first air outlet 621 on the first side wall 11, ensuring that the cold air blown out of the first air outlet 621 can remove the frost layer on the top of the second side wall 12. The cold air blown out of the first air outlet 621, located at the top, can also disperse the frost layer formed by the cold air from the evaporator horizontal tube 322 on the top of the third side wall 13.

[0056] The terms "horizontal evaporator tube 322" and "vertical evaporator tube 321" do not necessarily refer to a single evaporator tube 312; they can refer to multiple vertically or horizontally arranged evaporator tubes 312. Figure 2 In this configuration, there are two evaporator vertical tubes 321 and two evaporator horizontal tubes 322. The end of the evaporator horizontal tube 322 that is away from the evaporator vertical tube 321 is connected to form a loop. That is, the refrigerant flows upward from one evaporator vertical tube 321 to one evaporator horizontal tube 322. After flowing to the end away from the evaporator vertical tube 321, the refrigerant flows to another evaporator horizontal tube 322 and then flows back through another evaporator vertical tube 321, completing the cycle.

[0057] Furthermore, the horizontal evaporation tube 322 and the vertical evaporation tube 321 described in this application are only distinguishing the auxiliary evaporator 32 when it extends in different directions; in reality, they are a single complete pipe.

[0058] In addition, an S-shaped tube 33 can be installed, which can be used as follows: Figure 2 It can be attached to the third side wall 13, or it can be attached to the first side wall 11 and / or the second side wall 12.

[0059] In some embodiments of this application, the air-cooled horizontal freezer further includes a fan assembly that communicates with the evaporator chamber 50. The fan assembly is disposed against the first side wall 11 and communicates with the air duct 60.

[0060] The fan assembly includes the aforementioned volute 61 and a fan (not shown) disposed within the volute 61. Since the air duct 60 is disposed on the first side wall 11, the fan assembly is also disposed on the first side wall 11. The fan draws cold air from the evaporator chamber 50 and then blows it out of the volute 61 upwards and downwards through the air duct 60, and blows it out into the refrigeration chamber 10 from the first air outlet 621 and the second air outlet 631.

[0061] In some embodiments of this application, the evaporator chamber cover 5 is provided with a return air inlet, and the refrigeration evaporator 31 is disposed between the return air inlet and the fan assembly in the direction from the first side wall 11 to the second side wall 12.

[0062] The cold air blown out from the first air outlet 621 and the second air outlet 631 cools the food in the refrigeration chamber 10. The hot air then enters the evaporator chamber 50 through the return air inlet on the evaporator chamber cover 5 for re-cooling. The refrigeration evaporator 31 is positioned between the return air inlet and the fan assembly, so that all the hot air entering the evaporator chamber 50 from the return air inlet can pass through the refrigeration evaporator 31 for heat exchange before being blown out by the fan assembly, avoiding the hot air being blown out directly without heat exchange.

[0063] In some embodiments of this application, the evaporator chamber cover 5 includes a side plate 52 and a top plate 51. The return air inlet corresponding to the side plate 52 and the top plate 51 includes a side return air inlet 522 and a top return air inlet 5111. The top plate 51 extends upward and is provided with a plurality of protrusions 511. The top return air inlet 5111 is provided on the side of the protrusions 511. The side plate 52 is provided with a plurality of ribs 521. The side return air inlet 522 is provided between adjacent ribs 521.

[0064] Specifically, such as Figure 7 In the middle, the side plate 52 faces outward (relative to the evaporator chamber 50) and is provided with multiple horizontal ribs 521 at intervals in the vertical direction. A side return air vent 522 is provided between the multiple ribs 521. Of course, it can also be understood that after the side return air vent 522 is opened, a locking rib 521 is provided at the opening position of the side return air vent 522.

[0065] The ribs 521 prevent food placed on the bottom wall 14 from blocking the side return air vents 522 when it is attached to the side plate 52, thus preventing air return. Even if food is placed at the location of the side return air vents 522 on the side plate 52, hot air can still enter the evaporator chamber 50 through the gap between adjacent ribs 521 under the guidance of the ribs 521, even at locations without side return air vents 522.

[0066] A guide rib 523 is also provided at the side return air vent 522. The guide rib 523 is inclined upward in the direction from the refrigeration chamber 10 to the evaporator chamber 50, so that the hot air at the bottom of the refrigeration chamber 10 can also smoothly enter the evaporator chamber 50 under the guidance of the guide rib 523.

[0067] The upward-extending protrusion 511 of the side plate 52 is a hollow structure rather than a solid structure, or in other words, the protrusion 511 forms a downward-opening groove, and a top return air vent 5111 is opened on the side wall of the groove.

[0068] Similarly, the protrusions 511 of the top plate 51 can also prevent food from blocking the top return air vent 5111 of the top plate 51, thus preventing air return. When air return is required at the top, hot air enters between two adjacent protrusions 511 and then enters the evaporator chamber 50 from the side-opening top return air vent 5111.

[0069] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0070] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A wind-cooled horizontal freezer, characterized in that, The device includes a housing and a refrigeration system disposed within the housing. The housing has a refrigeration chamber (10) with a top opening and an evaporator chamber (50) disposed near the bottom of the refrigeration chamber (10) and communicating with the refrigeration chamber (10). The refrigeration system includes an evaporator for refrigerating the refrigeration chamber (10). The evaporator includes a refrigeration evaporator (31) and an auxiliary evaporator (32) disposed in parallel. The refrigeration evaporator (31) is disposed in the evaporator chamber (50), and the auxiliary evaporator (32) is at least partially disposed near the top opening of the housing.

2. The air-cooled horizontal freezer according to claim 1, characterized in that, It also includes an air duct (60) connecting the evaporator chamber (50) and the refrigeration chamber (10), the air duct (60) having a first air outlet (621) communicating with the refrigeration chamber (10), the first air outlet (621) being close to the top opening of the housing; the position of the auxiliary evaporator (32) is defined such that its cold radiation range is at least partially located within the path of the cold air blown out by the first air outlet (621).

3. The air-cooled horizontal freezer according to claim 2, characterized in that, The housing also includes an inner liner (1), which includes a first sidewall (11) and a second sidewall (12) disposed opposite to each other. The air duct (60) is disposed on the first sidewall (11), and the auxiliary evaporator (32) is disposed at least partially against the second sidewall (12).

4. The air-cooled horizontal freezer according to claim 3, characterized in that, The inner liner (1) also includes a bottom wall (14) and a boss (15) protruding upward from one end of the bottom wall (14); The air-cooled horizontal freezer also includes an L-shaped evaporator chamber cover (5), which is located above the boss (15) and surrounds the inner liner (1) to form an evaporator chamber (50).

5. The air-cooled horizontal freezer according to claim 4, characterized in that, The inner liner (1) also includes a third sidewall (13) connected to the first sidewall (11) and the second sidewall (12). The auxiliary evaporator (32) includes an evaporation vertical tube (321) and an evaporation horizontal tube (322). The evaporation vertical tube (321) is attached to the third sidewall (13) and extends upward to the top. The evaporation horizontal tube (322) extends from the top of the evaporation vertical tube (321) to the second sidewall (12) and extends along the length of the second sidewall (12).

6. The air-cooled horizontal freezer according to claim 5, characterized in that, It also includes a fan assembly that communicates with the evaporator chamber (50), the fan assembly being disposed against the first sidewall (11) and communicating with the air duct (60).

7. The air-cooled horizontal freezer according to claim 6, characterized in that, The evaporator chamber cover (5) is provided with a return air inlet. The refrigeration evaporator (31) is located between the return air inlet and the fan assembly in the direction from the first side wall (11) to the second side wall (12).

8. The air-cooled horizontal freezer according to claim 7, characterized in that, The evaporator chamber cover (5) includes a side plate (52) and a top plate (51). The return air inlet corresponding to the side plate (52) and the top plate (51) includes a side return air inlet (522) and a top return air inlet (5111). The top plate (51) extends upward and is provided with several protrusions (511). The top return air inlet (5111) is provided on the side of the protrusions (511). The side plate (52) is provided with several ribs (521). The side return air inlet (522) is provided between adjacent ribs (521).

9. The air-cooled horizontal freezer according to claim 1, characterized in that, It also includes a heating wire (4), which is disposed in the evaporator chamber (50) to defrost the refrigeration evaporator (31); The refrigeration evaporator (31) includes a plurality of evaporation fins (311) and evaporation tubes (312) connected to the evaporation fins (311). Some of the evaporation fins (311) are also provided with mounting grooves (3111), and the heating wire (4) is installed in the mounting grooves (3111).

10. The air-cooled horizontal freezer according to claim 1, characterized in that, The refrigeration system also includes a diverting valve (34), which is located at the front end of the evaporator and is used to control the flow of refrigerant to the refrigeration evaporator (31) or the auxiliary evaporator (32).

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