阅读说明：本技术 一种冷柜 (Refrigerator ) 是由 张雪梅 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种大容积(400L以上)无霜风冷冷柜,涉及制冷设备领域。本发明公开的冷柜包括门体和箱体,在箱体的前壁、后壁以及两个侧壁上分散地设置有十二组风道,所述风道的设置位置左右对称；在两个侧壁上分别设置有蒸发器和两个风机。为了使冰柜的两侧能够均匀制冷,在冰柜的左右两个区域对称设置两个传感器,当两个传感器只要有一个反馈的温度达不到设定档位贵的的温度范围时,便控制冷柜进行制冷。本发明解决了目前市场上缺少大容积的风冷冷柜的问题,同时实现了大体积冷柜的均匀制冷。(The invention discloses a large-volume (more than 400L) frost-free air-cooled refrigerator, and relates to the field of refrigeration equipment. The refrigerator disclosed by the invention comprises a door body and a box body, wherein twelve groups of air ducts are dispersedly arranged on the front wall, the rear wall and two side walls of the box body, and the arrangement positions of the air ducts are bilaterally symmetrical; an evaporator and two fans are respectively arranged on the two side walls. In order to enable the two sides of the freezer to refrigerate uniformly, two sensors are symmetrically arranged in the left area and the right area of the freezer, and when only one temperature fed back by the two sensors does not reach the temperature range with expensive set gears, the freezer is controlled to refrigerate. The invention solves the problem that the large-volume air-cooled refrigerator is lacked in the market at present, and simultaneously realizes the uniform refrigeration of the large-volume refrigerator.)

1. The utility model provides a refrigerator, includes refrigerator door body and refrigerator box, the refrigerator door body sets up at the refrigerator top, can upwards open, the refrigerator box has lateral wall and diapire, the lateral wall includes:

the first side wall is recessed downwards to form a compressor bin step;

a second side wall disposed opposite to the first side wall;

the left side of the front wall is connected with the second side wall, and the right side of the front wall is connected with the side wall of the first side wall;

a right wall opposite the front wall and parallel to the side walls of the front wall;

the bottom wall is opposite to the refrigerator door body and is parallel to the refrigerator door body,

the method is characterized in that:

a first evaporation cavity is vertically arranged on the step of the compressor bin on the first side wall, and an air supply duct is arranged on the first evaporation cavity;

a second evaporation cavity is vertically arranged on the second side wall, and an air supply duct is arranged on the second evaporation cavity;

the refrigerator comprises a refrigerator body, a door body, a front wall, a door body, two air supply air channels and two air return air channels, wherein the front wall is provided with the two air supply air channels and the two air return air channels;

the refrigerator is characterized in that two air supply air channels and two air return air channels are arranged on the rear wall, the two air supply air channels are symmetrically arranged, the two air supply air channels are close to one side of the door body in the height direction of the refrigerator, and the two air supply air channels are symmetrically arranged and are close to one side of the bottom wall in the height direction of the refrigerator;

the air supply duct that sets up on the antetheca with set up on the back wall the air supply duct symmetry sets up, set up on the antetheca the return air duct with set up on the back wall the return air duct symmetry sets up.

2. The refrigerator of claim 1 wherein the first and second evaporating chambers are each provided with an evaporator and a fan, the fan being disposed above the evaporator.

3. The refrigerator of claim 1 wherein one of the two supply air ducts on the front wall is located on a side of the refrigerator closer to the first side wall in the length direction of the refrigerator, the other is located on a side of the refrigerator closer to the second side wall in the length direction of the refrigerator, one of the two return air ducts on the front wall is located on a side of the refrigerator closer to the step of the compressor compartment on the first side wall in the length direction of the refrigerator, and the other is located on a side of the refrigerator closer to the second side wall in the length direction of the refrigerator.

4. The refrigerator of claim 1 wherein one of the two air supply ducts on the back wall is located on the length direction of the refrigerator near one side of the first side wall, the other is located on the length direction of the refrigerator near one side of the second side wall, one of the two air return ducts on the back wall is located on the length direction of the refrigerator near one side of the step of the compressor compartment on the first side wall, the other is located on the length direction of the refrigerator near one side of the second side wall.

5. The refrigerator of claim 1 wherein one of the two supply air ducts on the front wall is located on a side of the refrigerator closer to the first side wall in the length direction of the refrigerator, the other is located on a side of the refrigerator closer to the second side wall in the length direction of the refrigerator, one of the two return air ducts on the front wall is located on a side of the refrigerator closer to the step of the compressor compartment on the first side wall in the length direction of the refrigerator, and the other is located on a side of the refrigerator closer to the second side wall in the length direction of the refrigerator.

6. The refrigerator of claim 4 or claim 5 wherein the two air supply ducts provided on the rear wall and the two air supply ducts provided on the front wall are provided at the same height.

7. A refrigerator as claimed in claim 4 or claim 5, wherein the two return air ducts provided in the rear wall are disposed at the same height as the two return air ducts provided in the front wall.

8. The cooler of claim 1, wherein said front wall or said back wall has two symmetrically disposed temperature sensors.

9. The cooler of claim 1, wherein a water receiving tray is provided on a side of the bottom wall adjacent to an outer side of one end of the second side wall and on a side of the first side wall parallel to the bottom wall on an outer side of the compressor housing step.

10. A refrigerator is provided with two temperature sensors, a temperature sensor, a compressor, a fan and a control device,

the control device controls the fan and the compressor according to the temperature detected by the temperature sensor,

the control device is characterized in that when the temperature fed back by one of the two symmetrically arranged temperature sensors does not reach the temperature range specified by a set gear, the control device controls the compressor and the fan to refrigerate; and when the two symmetrically arranged temperature sensors reach the temperature range specified by the set gear, the control device controls the compressor and the fan to stop working.

11. A refrigerator is provided with two defrosting sensors, two defrosting heaters, an evaporator and a control device,

the control device controls the two defrosting heaters according to the temperature detected by the defrosting sensor,

the defrosting method is characterized in that after the two defrosting sensors reach the target temperature value required by defrosting, the control device controls the defrosting heater to stop working.

Technical Field

The invention relates to refrigeration equipment, in particular to a large-volume horizontal frost-free refrigerator.

Background

The refrigerator has the characteristics of large freezing capacity, wide volume range (100L-1000L), random use occasions and the like, and is widely applied to various occasions such as rural families, meat markets, retail stores, restaurants and the like. The horizontal top-opening door refrigerator on the market comprises an air-cooled refrigerator and a direct-cooled refrigerator. The direct-cooling refrigerator has the advantages of simple structure, simple system, low cost and the like. But also has certain disadvantages: the evaporator of the horizontal direct-cooling refrigerator adopts a winding evaporator, namely the evaporator is directly wound on the inner container of the refrigerator according to a certain rule. When the system is refrigerating, i.e., food closer to the liner is cooled more rapidly, food further from the liner (e.g., placed in the middle of a freezer) is cooled more slowly. In addition, in the long-term operation process, when the door is opened continuously to take things, a large amount of hot air enters the box body, and the wall surface of the inner container is frosted continuously. The frost layer gradually accumulates to be thicker, and the speed of cooling food and the power consumption of the box body are influenced. Moreover, manual defrosting is troublesome, and inconvenience is brought to users.

The design scheme of the air duct and the system of the existing air-cooled frostless freezer with the volume of below 280L on the market at present is difficult to realize on a freezer with the volume of above 300L, and particularly, effective refrigeration cannot be realized on the freezer with the volume of above 400L and larger. The main problems that exist are: the existing horizontal air-cooled refrigerator systems below 280L are all single evaporation cavities. That is, only one evaporator is designed and is disposed in a space above the compressor stage. The horizontal freezer is generally low in height, and the width of the steps of the compressor compartment and the height of the space above the compressor compartment are limited, so that the evaporator in the evaporation cavity is limited in height and thickness. For the large refrigerator with the volume of more than 400L, the evaporator of the existing air-cooled refrigerator is difficult to meet the requirement of large evaporation volume of the large refrigerator; in addition, if the air duct design of the existing horizontal air-cooled refrigerator below 280L is applied to a large refrigerator above 400L, the air field of the air duct design can not cover the space far away from one end of the evaporator and one end of the fan, and uniform refrigeration in the refrigerator can not be realized.

At present, the volume of the existing horizontal air-cooling frostless refrigerator products of enterprises in the industry is below 280L, and for the horizontal top-opening door refrigerators above 300L, direct-cooling products are all available, and no air-cooling products are available. Therefore, how to design an air-cooled freezer with a volume larger than 400L is a technical problem to be solved by the invention.

Disclosure of Invention

The invention provides a large-capacity (more than 400L) air-cooled refrigerator, which aims to solve the problems that the air-cooled refrigerator in the market has small capacity, the cold quantity of the large refrigerator is not uniformly distributed, the large refrigerator is easy to frost and the like.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the embodiment of the invention provides a refrigerator, which comprises a refrigerator door body and a refrigerator box body, wherein the refrigerator door body is arranged at the top of the refrigerator and can be opened upwards, the refrigerator box body is provided with a side wall and a bottom wall, and the side wall comprises:

the first side wall is recessed downwards to form a compressor bin step;

a second side wall disposed opposite to the first side wall;

the left side of the front wall is connected with the second side wall, and the right side of the front wall is connected with the side wall of the first side wall;

a right wall opposite the front wall and parallel to the side walls of the front wall;

the bottom wall is opposite to the refrigerator door body and is parallel to the refrigerator door body,

the method is characterized in that:

a first evaporation cavity is vertically arranged on the step of the compressor bin on the first side wall, and an air supply duct is arranged on the first evaporation cavity;

a second evaporation cavity is vertically arranged on the second side wall, and an air supply duct is arranged on the second evaporation cavity;

the refrigerator comprises a refrigerator body, a door body, a front wall, a door body, two air supply air channels and two air return air channels, wherein the front wall is provided with the two air supply air channels and the two air return air channels;

the refrigerator is characterized in that two air supply air channels and two air return air channels are arranged on the rear wall, the two air supply air channels are symmetrically arranged, the two air supply air channels are close to one side of the door body in the height direction of the refrigerator, and the two air supply air channels are symmetrically arranged and are close to one side of the bottom wall in the height direction of the refrigerator;

the air supply duct that sets up on the antetheca with set up on the back wall the air supply duct symmetry sets up, set up on the antetheca the return air duct with set up on the back wall the return air duct symmetry sets up.

The refrigerator of claim 1 wherein the first and second evaporating chambers are each provided with an evaporator and a fan, the fan being disposed above the evaporator.

One of them is in two air supply wind channels that set up on the antetheca be close to first lateral wall one side on the length direction of freezer, another is in be close to second lateral wall one side on the length direction of freezer, one of them is in two return air wind channels that set up on the antetheca be close to compressor machine storehouse step one side on the first lateral wall on the length direction of freezer, another is in be close to second lateral wall one side on the length direction of freezer.

One of them is in two air supply wind channels that set up on the back wall be close to first side wall one side on the length direction of freezer, another is in be close to second side wall one side on the length direction of freezer, one of them in two return air wind channels that set up on the back wall be close to compressor machine storehouse step one side on the first side wall on the length direction of freezer, another is in be close to second side wall one side on the length direction of freezer.

One of them is in two air supply wind channels that set up on the antetheca be close to first lateral wall one side on the length direction of freezer, another is in be close to second lateral wall one side on the length direction of freezer, one of them is in two return air wind channels that set up on the antetheca be close to compressor machine storehouse step one side on the first lateral wall on the length direction of freezer, another is in be close to second lateral wall one side on the length direction of freezer.

The two air supply air channels arranged on the rear wall and the two air supply air channels arranged on the front wall are arranged at the same height.

The two air return ducts arranged on the rear wall and the two air return ducts arranged on the front wall are arranged at the same height.

Two symmetrically arranged temperature sensors are arranged on the front wall or the rear wall.

And a water receiving box is arranged on the side surface of the outer side of one end, close to the second side wall, of the bottom wall and on the surface, parallel to the bottom wall, of the outer side of the compressor bin step of the first side wall.

A refrigerator is provided with two temperature sensors, a temperature sensor, a compressor, a fan and a control device, wherein the control device controls the fan and the compressor according to the temperature detected by the temperature sensor, and when the temperature fed back by one of the two symmetrically arranged temperature sensors does not reach the temperature range specified by a set gear, the control device controls the compressor and the fan to refrigerate; and when the two symmetrically arranged temperature sensors reach the temperature range specified by the set gear, the control device controls the compressor and the fan to stop working.

The utility model provides a refrigerator, the refrigerator has two defrosting sensors and two defrosting heaters, evaporimeter, controlling means basis the temperature that the defrosting sensor detected is right two defrosting heaters control, after two defrosting sensors all reached the target temperature value that the defrosting required, controlling means control defrosting heater stop work.

The invention has the beneficial effects that: the air-cooled refrigerator with large volume (more than 400L) is provided, the problem that the air-cooled refrigerator with large volume is lacked in the current market is solved, and meanwhile, the uniform refrigeration of the air-cooled refrigerator with large volume is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view illustrating a horizontal frostless freezer provided by the present invention;

fig. 2 shows a design scheme of a refrigerating system of the horizontal frostless refrigerator provided by the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as the upper and lower … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The large-volume frost-free freezer provided by the invention is mainly composed of a door body 1 and a box body 2 as shown in figures 1-2.

Particularly, this embodiment freezer door body 1 movably sets up at this freezer top, can upwards open.

The chest freezer housing 2 has four side walls and a bottom wall. One side wall is recessed downwards to form a compressor bin step 2-1-1. The compressor bin step 2-1-1 is used for installing a compressor 6 on the outer side, and the side wall with the compressor bin step 2-1-1 is a first side wall 2-1. The side wall opposite to the first side wall is a second side wall 2-2, of the two opposite side walls connecting the first side wall 2-1 and the second side wall 2-2, the side wall connecting the second side wall 2-2 at the left side and the first side wall 2-1 at the right side is a front wall, and the side wall opposite to the front wall and parallel to the front wall is a rear wall. The bottom wall is opposite to the refrigerator door body 1, is parallel to the refrigerator door body 1 and is positioned at the bottom of the horizontal type refrigeration box body.

And the box body 2 is provided with an air duct assembly 3, a refrigerating system 4, a water receiving box 5 and a compressor 6.

In some embodiments, the refrigeration system 4 includes two evaporation chambers 4-1 and 4-2 disposed on the first side wall 2-1 and the second side wall 2-2, respectively, and the two evaporation chambers are symmetrically disposed. The first evaporation cavity 4-1 is vertically arranged on the compressor bin step 2-1-1 on the first side wall 2-1, and the second evaporation cavity 4-2 is vertically arranged on the second side wall 2-2. An evaporator 4-1-1 and a fan 4-1-2 are arranged in the first evaporation cavity 4-1, and an evaporator 4-2-1 and a fan 4-2-2 are arranged in the second evaporation cavity 4-2. The fan 4-1-2 is arranged above the evaporator 4-1-2; the fan 4-2-2 is arranged above the evaporator 4-2-1.

The air duct assembly 3 is divided into two parts: one part is an air supply duct, and the other part is an air return duct.

Air supply ducts 3-5 and air supply ducts 3-6 are formed at the positions of the two evaporation cavities corresponding to the two fans. The air supply duct 3-1 is arranged at the upper right corner of the rear wall, namely, at one side close to the first side wall 2-1 in the length direction of the refrigerator and at one side close to the refrigerator door body 1 in the height direction of the refrigerator. The air supply duct 3-2 is arranged at the upper right corner of the front wall, one side of the freezer close to the first side wall 2-1 in the length direction and one side of the freezer door body 1 in the height direction. The air supply duct 3-1 and the air supply duct 3-2 are symmetrically arranged on the front wall and the rear wall. The air supply duct 3-3 is arranged at the upper left corner of the rear wall, namely, at one side close to the second side wall 2-2 in the length direction of the refrigerator and at one side close to the refrigerator door body 1 in the height direction of the refrigerator. The air supply duct 3-4 is arranged at the upper left corner of the front wall, namely, on the side close to the second side wall 2-2 in the length direction of the refrigerator and on the side close to the refrigerator door body 1 in the height direction of the refrigerator. The air supply duct 3-3 and the air supply duct 3-4 are symmetrically arranged on the rear wall and the front wall. The air supply duct 3-1, the air supply duct 3-2, the air supply duct 3-3 and the air supply duct 3-4 are arranged at the same height.

Meanwhile, a return air duct 3-7 is formed at the lower side of the first evaporator 4-1-1 and the step 2-1-1 of the compressor bin, and a return air duct 3-8 is arranged at the lower side of the second evaporator 4-2-1. The air return duct 3-9 is arranged on the rear wall, is close to one side of the bottom wall in the height direction of the refrigerator, and is close to one side of the step 2-1-1 of the compressor bin in the length direction of the refrigerator. The air return duct 3-10 is arranged on the front wall, is close to one side of the bottom wall in the height direction of the refrigerator, and is close to one side of the step 2-1-1 of the compressor bin in the length direction of the refrigerator. The return air ducts 3-9 and the return air ducts 3-10 are symmetrically arranged on the front wall and the rear wall. The air return duct 3-11 is arranged at the lower left corner of the rear wall, namely one side of the refrigerator close to the second side wall 2-2 in the length direction and one side of the refrigerator close to the bottom wall in the height direction. The return air duct 3-12 is arranged at the lower left corner of the front wall, namely, on the side close to the second side wall 2-2 in the length direction of the refrigerator and on the side close to the bottom wall in the height direction of the refrigerator. The return air ducts 3-11 and the return air ducts 3-12 are symmetrically arranged on the front wall and the rear wall. The return air duct 3-9, the return air duct 3-10, the return air duct 3-11 and the return air duct 3-12 are arranged at the same height.

The arrangement method ensures that the air sent out from each air supply duct and each air return duct can be uniformly distributed in the box body 2, and ensures that the food in the refrigerator is uniformly cooled. The arrangement method of the air supply duct is not limited to the above, as long as the cold air can be sent out to uniformly cool the food in the refrigerator.

The refrigerator related to the embodiment of the invention is also provided with two water receiving boxes. The water receiving box 5-1 is detachably arranged on the surface of the outer side of the compressor bin step 2-1-1 parallel to the bottom wall and is used for being connected with water which is melted and flows out in the defrosting process of the evaporator 4-1-1. The water receiving box 5-2 is detachably arranged on the surface of the outer side of one end, close to the second side wall 2-2, of the bottom wall and is used for receiving water which is melted and flows out in the defrosting process of the evaporator 4-2-1.

The reason why the freezer provided by the invention is provided with 12 air duct assemblies is that the large-volume frost-free freezer related by the invention has overlarge volume, and the structures such as one air duct assembly and one sensor are not enough to refrigerate the interior of the freezer box body 2. And as before, the position that 12 wind channel subassemblies set up is more dispersed, can guarantee the inside refrigeration homogeneity of freezer box 2 like this. The two sensors are arranged, so that accurate temperature control of the internal box body of the freezer can be realized.

The problem that the size of the box body of the refrigerator is too long in the length direction exists, so that in order to accurately control the refrigerating temperature of the whole box body inner area, two temperature sensors are symmetrically arranged in the left space and the right space and used for respectively collecting the temperature of the left space and the temperature of the right space and jointly monitoring and controlling the temperature in the refrigerator.

In some embodiments, the two temperature sensors are symmetrically disposed on the front wall, and in other embodiments, the two temperature sensors are symmetrically disposed on the rear wall. The temperature sensor is not limited to this as long as the installation position of the temperature sensor satisfies the symmetrical installation and the temperature in the tank can be monitored and controlled together.

The design scheme of the refrigerating system of the large-volume frost-free refrigerator provided by the invention is shown in figure 2. The working process and principle of the system are as follows: when the temperature value fed back by one of the first temperature sensor 7-1 and the second temperature sensor 7-2 does not reach the temperature range specified by the set gear, the control device in the refrigerator controls the compressor 6, the fan 4-1-2 and the fan 4-2-2 to refrigerate. High-temperature and high-pressure refrigerant flowing out of the compressor 6 flows through the condenser 8 and the filter 9 and then is subjected to equal-flow shunting through the tee joint 10, the shunted refrigerant flows into the capillary tube 11-1 and the capillary tube 11-2 respectively for throttling, and the throttled refrigerant is sprayed into the first evaporator 4-1-1 and the second evaporator 4-2-1 respectively. The refrigerants in the first evaporator 4-1-1 and the second evaporator 4-2-1 are evaporated to cool the air in the corresponding evaporation cavity, meanwhile, the fan 4-1-2 and the fan 4-2-2 are operated, and the cold air in the two evaporation cavities is blown into the refrigerator body 2 through the air supply channels 3-5, the air supply channels 3-6 and the air supply channels 3-1, 3-2, 3-3 and 3-4 arranged on the front wall and the rear wall to cool the food in the refrigerator body 2. After passing through the space in the whole cabinet, the airflow flows back to the evaporator cavity through the return air ducts 3-7 and 3-12 and the return air ducts 3-8, 3-9, 3-10 and 3-11 arranged on the front wall and the rear wall to be cooled and then is sent out by the air supply duct again. The circulation is continuous, so that the refrigeration in the cabinet is realized. When the temperatures fed back by the first temperature sensor 7-1 and the first temperature sensor 7-2 reach the temperature range specified by the set gear, the control device controls the compressor 6, the fan 4-1-2 and the fan 4-2-2 to stop working.

Here, since the flow rates of the refrigerants flowing through the capillary tube 11-1 and the capillary tube 11-2 are the same, the fluid states after the capillary tube 11-1 and the capillary tube 11-2 are throttled are the same. The first evaporator 4-1-1 and the second evaporator 4-2-1 have the same pipeline specification and evaporator area, and the fan 4-1-2 and the fan 4-2-2 have the same specification. The cold thermal physical states in the first evaporator 4-1-1 and the second evaporator 4-2-1 are substantially similar. The air duct assemblies 3-1, 3-2, 3-5, 3-7, 3-8, 3-9, 3-3, 3-4, 3-6, 3-10, 3-11 and 3-12 are identical in structure, and the 3-1, 3-2, 3-5, 3-7, 3-9 and 3-10 are arranged on the first side wall 2-1 and one side of the compressor bin step 2-1 and used for circulating air cooled in the evaporator 4-1-1; 3-3, 3-4, 3-6, 3-8, 3-11, 3-12 are provided on the side of the second side wall 2-2 for circulating the air cooled in the evaporator 4-2-1. The two groups of air duct components are symmetrically arranged one by one, so that the gas flow field distribution in the left and right spaces is basically symmetrical. The wind fields at the middle junction are mutually disturbed and fused, so that the space in the whole cabinet can be uniformly and effectively refrigerated.

Two defrosting sensors with the same specification are arranged on the left two evaporators of the large-volume frost-free refrigerator: a first frost sensor 4-3-1 and a second frost sensor 4-3-2. The two defrosting sensors with the same specification can detect the temperature in the cabinet and are respectively arranged in the first evaporator 4-1-1 and the second evaporator 4-2-1. The refrigerator 1 is provided with a control device 12 for controlling the first evaporator 4-1-1 and the second evaporator 4-2-1 to enter the defrosting process at the same time. When the temperature values detected by the first defrosting sensor 4-3-1 and the second defrosting sensor 4-3-2 both reach the target temperature value required by defrosting, the control device 12 controls the first defrosting heater 4-4-1 and the second defrosting heater 4-4-2 to stop working, and controls the compressor 6, the fan 4-1-2 and the fan 4-2-2 to start working for refrigerating. In some embodiments, the defrosting process may be performed within a certain time period after the two fans stop operating, or the control device may control the two evaporators to enter the defrosting process when the temperature values detected by the two temperature sensors reach a certain threshold value.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.