Refrigeration chamber located at the bottom of the freezer compartment

Abstract

The application provides a refrigerator with a refrigeration chamber located at the bottom of a freezing chamber, which comprises a cabinet, a lower part of which defines the freezing chamber, and a bottom of the freezing chamber is formed with the refrigeration chamber; an evaporator in the form of a flat cuboid as a whole is installed in the refrigeration chamber; an evaporator front baffle is arranged at the front of the refrigeration chamber; an evaporator cover is arranged at the upper part of the evaporator; a filling part is located between the evaporator cover and the top of the evaporator; a supply air duct is arranged at the rear of the freezing chamber, and the lower end of the supply air duct is provided with a supply air port opening to the rear of the refrigeration chamber, and the supply air duct supplies air to the freezing chamber through a freezing air inlet opening to the freezing chamber; and an evaporator fan is arranged at the supply air port to send the air in the refrigeration chamber into the supply air duct. The refrigerator optimizes the installation mode of the evaporator, improves the utilization efficiency of the space of the refrigerator, facilitates the taking and placing operation of the user, and ensures the smooth return air of the refrigeration chamber.

Description

[0001] This application is a divisional application of Chinese patent application No. 201810332209.6, filed on April 13, 2018, entitled "Refrigerator with Refrigeration Chamber Located at the Bottom of Freezer Chamber". Technical Field

[0002] This invention relates to the field of home appliances, and in particular to a refrigerator whose refrigeration compartment is located at the bottom of the freezer compartment. Background Technology

[0003] Refrigerators are one of the essential household appliances in people's daily lives.

[0004] Existing refrigerators generally have multiple storage compartments, which can be configured as refrigerator compartments, variable temperature compartments or fresh food compartments, and freezer compartments according to their uses. These compartments are generally arranged from top to bottom. In order to save space, the freezer compartment at the bottom is close to the ground, which makes it very inconvenient for users to use the freezer compartment. They often have to squat down to operate it, which affects the user experience.

[0005] Furthermore, when the freezer compartment is a drawer-type compartment, the compressor compartment is often located at the back of the bottom of the refrigerator. This compressor compartment takes up some drawer space, requiring the drawers to be irregularly shaped, resulting in the bottom space of the refrigerator not being fully utilized. Moreover, the bottom drawers of the refrigerator also need to be made very deep, requiring stored items to be stacked during use, and users need to spend too much time rummaging through them to retrieve items, causing inconvenience. Summary of the Invention

[0006] One objective of this invention is to provide a method that increases the ground clearance of the bottom storage space of a refrigerator, thereby improving the user experience.

[0007] A further objective of this invention is to improve the utilization efficiency of refrigerator storage space.

[0008] Another further objective of this invention is to prevent the return air duct of the refrigeration chamber from freezing, which would cause return air compensation issues.

[0009] This invention provides a refrigerator, comprising:

[0010] The cabinet has a freezer compartment defined at its lower part, and a refrigeration chamber is formed at the bottom of the freezer compartment;

[0011] The evaporator, which is generally flat and rectangular, is installed in the refrigeration chamber;

[0012] Evaporator front baffle, located at the front of the refrigeration chamber;

[0013] Evaporator cover, located on the upper part of the evaporator;

[0014] The filling section is located between the evaporator cover and the top of the evaporator.

[0015] An air supply duct is located at the rear of the freezer compartment, with an air outlet at its lower end leading to the rear of the freezer compartment, and supplies air to the freezer compartment via a freezer air inlet; and

[0016] The evaporator fan is located at the air outlet to deliver air from the cooling room into the air duct.

[0017] In some embodiments of this application, the evaporator cover includes an upper cover portion disposed above the evaporator; and a freezing compartment forms a freezing storage cavity above the upper cover portion; the upper cover portion is spaced from the top of the evaporator.

[0018] In some embodiments of this application, the evaporator cover further includes an inclined portion extending upward from the top of the evaporator front baffle, the inclined portion being connected to the upper cover portion, and a refrigeration return air vent communicating with the refrigeration storage cavity and the refrigeration chamber is provided on the inclined portion.

[0019] In some embodiments of this application, an air-guiding plate is provided within the interval;

[0020] The filling section is arranged between the air intake plate and the upper cover, so that the upper cover presses against the evaporator.

[0021] In some embodiments of this application, the rear portion of the air duct is attached to the rear portion of the top of the evaporator, and its front portion is raised upwards, defining an air duct passage between the front portion of the air duct and the evaporator.

[0022] In some embodiments of this application, an air guide plate is provided in the interval; the rear part of the air guide plate is attached to the rear part of the top of the evaporator; its front part is raised upward and defines an air guide channel between the front part of the evaporator;

[0023] The filling section is located between the air intake plate and the upper cover.

[0024] In some embodiments of this application, the air intake plate includes:

[0025] The rear section fits into the rear part of the top of the evaporator;

[0026] The inclined section extends from the front end of the rear section;

[0027] The front section extends from the front end of the inclined section to the top of the evaporator and defines an air intake channel with the top of the evaporator, thereby introducing the refrigerated return air flow from the refrigeration return air inlet into the front end of the evaporator and / or the front part of the top of the evaporator through the air intake channel.

[0028] In some embodiments of this application, the front end of the front section is curved upward to increase the opening area of ​​the air intake channel.

[0029] In some embodiments of this application, the airflow entering from the refrigeration return air inlet is configured to enter the heat exchange area of ​​the evaporator from the front of the evaporator through the gap between the evaporator front baffle and the front end of the evaporator, or to enter the heat exchange area of ​​the evaporator from the top of the evaporator.

[0030] In some embodiments of this application, the refrigeration return air vent includes multiple longitudinally spaced return air grilles, and each return air grille has a baffle plate protruding from the outer surface of the inclined portion at its upper edge to prevent foreign objects from falling into the refrigeration return air vent from above.

[0031] In some embodiments of this application, the refrigerator further includes: an air supply duct disposed at the rear of the freezer compartment, having an air outlet at its lower end leading to the rear of the refrigeration compartment, and supplying air to the freezer compartment via a refrigeration air inlet leading to the freezer compartment; and an evaporator fan disposed at the air outlet to deliver air from the refrigeration compartment into the air supply duct.

[0032] In some embodiments of this application, the evaporator fan is configured to be tilted at a set angle relative to the evaporator.

[0033] In some embodiments of this application, the cabinet further defines at least one refrigerator compartment above the freezer compartment, and the air supply duct extends upward to the rear of the refrigerator compartment, and supplies air to the refrigerator compartment through the refrigerator air inlet; and the refrigerator further includes: a return air duct, disposed on at least one side of the cabinet, with its upper end connected to the refrigerator compartment and its lower end connected to the front of the refrigeration compartment, thereby drawing the return air from the refrigerator compartment back to the refrigeration compartment.

[0034] In some embodiments of this application, the housing further includes a variable temperature chamber, and the air supply duct leads to the variable temperature chamber through a variable temperature air inlet to supply air to the variable temperature chamber.

[0035] In some embodiments of this application, the opening at the lower end of the refrigeration chamber connecting to the return air duct is provided on the side wall of the gap between the evaporator front baffle and the front end of the evaporator.

[0036] In some embodiments of this application, the opening at the lower end of the refrigeration chamber connecting to the return air duct is located on both sides of the gap between the evaporator front baffle and the front end of the evaporator, so that the refrigerated return air can enter from the front of the evaporator.

[0037] In some embodiments of this application, a drainage slope and a heating wire are provided at the connection between the return air duct and the cooling chamber.

[0038] In some embodiments of this application, a compressor compartment is further formed behind the freezer compartment of the housing. The top wall of the compressor compartment is located below the air supply duct and lower than the top of the evaporator, and the bottom wall of the compressor compartment is lower than the lowest point of the bottom wall of the refrigeration compartment.

[0039] In some embodiments of this application, the refrigerator further includes a compressor, a condenser, and a cooling fan arranged laterally at intervals inside the compressor compartment.

[0040] In some embodiments of this application, the bottom wall of the refrigeration chamber is shaped to gradually concave from the periphery to the center, and a drain hole is provided at the lowest point; and the refrigerator also includes: an evaporating dish disposed in the compressor compartment, and a drain pipe connected to the drain hole, the drain pipe extending obliquely downward from the drain hole to the evaporating dish, so as to drain the condensate of the evaporator to the evaporating dish.

[0041] In some embodiments of this application, the bottom wall of the cooling chamber is in the shape of gradually concave from all sides to the center, and a drain hole is opened at the lowest point; wherein the bottom wall is an inverted quadrangular pyramid, and the angle between its four inclined planes and the horizontal plane is greater than or equal to 5°.

[0042] In some embodiments of this application, the refrigerator further includes: an evaporating dish disposed in the compressor compartment, and a drain pipe connected to a drain hole, the drain pipe being placed at an angle, with one end of the drain pipe connected to the drain hole being higher than the end leading to the evaporating dish.

[0043] In some embodiments of this application, a heat dissipation air inlet and a heat dissipation air outlet may be respectively provided on the left and right sides of the bottom of the housing, with the heat dissipation air inlet located on the condenser side and the heat dissipation air outlet located on the compressor side.

[0044] In some embodiments of this application, an insulation layer is provided between the compressor chamber and the refrigeration chamber.

[0045] The refrigerator of the present invention has its refrigeration compartment located at the bottom of the freezer compartment. In order to solve the problem of inconvenience to users due to its low position, the position of the evaporator in the refrigeration system is changed from the rear of the freezer compartment to the lower part of the freezer compartment. The vertical installation method of the evaporator is changed to a horizontal placement, which can increase the height of the freezer drawer, making it easier for users to operate. Furthermore, since the evaporator is no longer arranged at the back, the distance in the front-to-back direction of the refrigerator can be reduced, thereby improving the utilization efficiency of the refrigerator's storage space.

[0046] Furthermore, the refrigerator of the present invention also avoids occupying the bottom storage space by adjusting the positional relationship between the refrigeration chamber and the compressor chamber, thus solving the inconvenience caused by the excessive depth and small unfolded area of ​​the existing bottom storage drawers.

[0047] Furthermore, the refrigerator of the present invention optimizes the airflow channel of the cooling chamber by using an air deflector to form a return air bypass channel above the evaporator, thereby preventing the front of the evaporator from freezing and affecting airflow circulation.

[0048] Furthermore, the refrigerator of the present invention optimizes the air duct and heat dissipation structure, making it particularly suitable for built-in refrigerators and expanding its application scenarios.

[0049] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0050] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0051] Figure 1 This is a schematic diagram of a refrigerator according to an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the refrigerator body according to an embodiment of the present invention;

[0053] Figure 3 This is an exploded view of the refrigerator body portion according to an embodiment of the present invention;

[0054] Figure 4 This is an exploded view of the structure of the bottom component of a refrigerator according to an embodiment of the present invention;

[0055] Figure 5 This is a front view of the refrigerator body according to an embodiment of the present invention;

[0056] Figure 6 It is along Figure 5 A schematic cross-section cut by section line AA; and

[0057] Figure 7 This is a schematic diagram of the compressor compartment in a refrigerator according to an embodiment of the present invention. Detailed Implementation

[0058] This embodiment mainly provides a refrigerator 10 with the refrigeration compartment located at the bottom of the freezer compartment. This refrigerator 10 is particularly suitable as a built-in refrigerator, which further saves space and makes the appearance more unified and coordinated with the surrounding environment.

[0059] Figure 1 This is a schematic diagram of a refrigerator 10 according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the refrigerator body 100 according to an embodiment of the present invention (the outer shell of the refrigerator body 100 is omitted in order to show the internal structure of the refrigerator body 100), and Figure 3 This is an exploded view of the cabinet 100 portion of a refrigerator 10 according to an embodiment of the present invention.

[0060] The refrigerator 10 of this embodiment may include: a cabinet 100, a door (not shown in the figure), a refrigeration system, etc. The cabinet 100 includes: an outer shell, an inner liner, a heat insulation layer, and other accessories. The outer shell is the outer layer of the refrigerator 10, protecting the entire refrigerator 10. To isolate heat conduction from the outside environment, a heat insulation layer is provided between the outer shell and the inner liner. The heat insulation layer can be manufactured using a foaming process (the heat insulation layer is not shown in the figures to avoid obstructing other components).

[0061] The cabinet 100 defines at least one front-opening storage compartment, typically multiple, such as a refrigerator compartment 112, a freezer compartment 111, a variable-temperature compartment 113, etc. The specific number and function of the storage compartments can be configured according to pre-defined needs. Figure 1 The three vertically arranged storage compartments (refrigerated compartment 112, variable temperature compartment 113, and frozen compartment 111) shown in the figure are merely illustrative examples. In this embodiment, the number, structure, and function of each storage compartment can be configured according to specific circumstances.

[0062] The number of doors can be matched with the number of storage compartments, allowing each compartment to be opened individually. For example, refrigerator compartment 112, freezer compartment 111, and variable temperature compartment 113 can each have a refrigerator door 142, a freezer door 141, and a variable temperature door 143, respectively. In some alternative embodiments, the doors can also be hinged doors, double doors, sliding doors, drawer doors, etc. For example, refrigerator compartment 112 can be a double door, while variable temperature compartment 113 and freezer compartment 111 can use a drawer-type structure.

[0063] The refrigeration system can be a refrigeration cycle system consisting of a compressor 200, a condenser 500, a throttling device, and an evaporator 300. The evaporator 300 is configured to provide cooling capacity to the storage compartment, and the transfer of cooling capacity can be achieved through an air duct system, with airflow circulation achieved by a fan. Since the refrigeration system itself is known and easily implemented by those skilled in the art, the working principle of the refrigeration system will not be described in detail below in order not to obscure or obscure the inventive points of this application. In this embodiment, the compressor 200, condenser 500, and evaporator 300 can form an assembly with their respective auxiliary components. The refrigerator 10 has an air duct system that uses a fan to generate circulating airflow from the compartment to the evaporator 300 to achieve air-cooled refrigeration.

[0064] In the refrigerator 10 of this embodiment, the lowest compartment of the cabinet 100 is preferably configured as a freezer compartment 111, and a cooling chamber 151 for arranging the refrigerator evaporator 300 is formed at the bottom of the freezer compartment 111. The cooling chamber 151 is located in the front part of the bottom of the freezer compartment 111 to provide space for the air duct 410 and the evaporator fan 220 at its rear.

[0065] Because the evaporator 300 vibrates due to temperature changes during normal operation, existing refrigerators, where the evaporator 300 is located at the rear and blocked by insulation, greatly reduce the noise generated by vibration. However, in this embodiment, the refrigerator 10 places the evaporator 300 at the front of the bottom. If it is fixed using the inner liner, noise will occur when the evaporator 300 vibrates, thus affecting normal use. Therefore, this embodiment of the refrigerator 10 improves the fixing structure of the evaporator 300 to reduce the impact of noise.

[0066] Figure 4 This is an exploded view of the bottom component of the refrigerator body 100 according to an embodiment of the present invention. Figure 6 It is along Figure 5 The schematic cross-section cut by the section line AA in the figure only shows the cross-sectional structure of the bottom cooling compartment 151 of the refrigerator 10.

[0067] The evaporator 300 is generally a flat rectangular parallelepiped. The length of the evaporator 300 is the horizontal direction of the refrigerator 10, the width is the front-to-back depth of the refrigerator 10, and the thickness is the vertical direction of the refrigerator 10. The thickness of the evaporator 300 is less than its length and width. The evaporator 300 is installed inside the cooling compartment 151. The fins of the evaporator 300 are arranged parallel to the front-to-back direction of the refrigerator 10, allowing airflow to follow the direction of the fins and ensuring efficient heat exchange.

[0068] The front of the refrigeration compartment 151 has an evaporator front baffle 212. This evaporator front baffle 212 serves as the front wall of the refrigeration compartment 151 and is spaced apart from the front end of the evaporator 300. The space between the evaporator front baffle 212 and the front end of the evaporator 300 serves as a return air area for exhausting returning airflow from the refrigerator compartment 112, the variable temperature compartment 113, and the freezer compartment 111. For example, the return air duct 420 can guide the return air from the refrigerator compartment 112 back to this spaced area.

[0069] Increased humidity in the return air can cause frost to form on the front of the evaporator 300 where it contacts the return air, potentially leading to poor return air circulation. To address this issue, a return air bypass channel can be installed at the top of the evaporator 300.

[0070] The upper part of the evaporator 300 also has an evaporator cover 210, which serves as the top wall of the refrigeration chamber 151, thereby separating the storage area of ​​the freezer compartment 111 from the refrigeration chamber 151. The evaporator cover 210 includes an inclined portion 214 extending upward from the top of the evaporator front baffle 212 and an upper cover portion 215 connected to the inclined portion 214 and disposed above the evaporator 300; and the freezer compartment 111 forms a freezer storage cavity above the upper cover portion 215, and a freezer return air vent 217 communicating between the freezer storage cavity and the refrigeration chamber 151 is provided on the inclined portion 214. The airflow entering from the refrigeration return air inlet 217 can enter from the front of the evaporator 300 through the gap between the evaporator front baffle 212 and the front end of the evaporator 300, or it can enter the heat exchange area of ​​the evaporator 300 from the top of the evaporator 300. This avoids the increase of return air resistance due to frost, avoids frequent defrosting, and improves heat exchange efficiency.

[0071] The refrigeration return air vent 217 includes multiple longitudinally spaced return air grilles. Each return air grille has a baffle 218 (similar to a canopy structure) protruding from the outer surface of the inclined portion 214 at its upper edge to prevent foreign objects from falling into the refrigeration return air vent 217 from above.

[0072] There is a gap between the top cover 215 and the top of the evaporator 300. An air duct 232 is provided in the gap. The rear part of the air duct 232 is attached to the rear part of the top of the evaporator 300, and its front part is raised upward. The front part between the air duct 232 and the evaporator defines an air duct channel, so that the refrigerated return air flow from the refrigerated return air inlet 217 is introduced into the front end of the evaporator 300 through the air duct channel.

[0073] like Figure 6 As shown, a filling portion 231 is provided between the evaporator cover 210 and the top of the evaporator 300. The filling portion 231 is located between the evaporator cover 210 and the top of the evaporator 300. The filling portion 231 is supported between the evaporator cover 210 and the top of the evaporator 300.

[0074] The evaporator cover 210 has a gap between its upper cover 215 and the top of the evaporator 300, within which an air guide plate 232 is disposed. The air guide plate 232 includes: a rear section that fits against the rear of the top of the evaporator 300; an inclined section extending upwardly from the front end of the rear section; and a front section extending parallel to the top of the evaporator 300 from the front end of the inclined section. The front section and the top of the evaporator 300 define an air guide channel, thereby introducing the refrigerated return airflow from the refrigerated return air inlet 217 into the front end of the evaporator 300 and / or the front of the top of the evaporator 300 through the air guide channel. The front end of the front section curves upward to increase the opening area of ​​the air guide channel.

[0075] A filling portion 231 is arranged between the air intake plate 232 and the upper cover 215, thereby causing the upper cover 215 to press against the evaporator 300. That is, as Figure 6 As shown, the filling section 231 extends from the rear of the top of the evaporator 300 to the front of the top of the evaporator 300. The air intake plate 232 is preferably made of a material with good thermal conductivity and structural strength, such as aluminum plate. Utilizing the air intake channel formed by the air intake plate 232, when the front of the evaporator 300 is frosted due to abnormal operation or a high-temperature, high-humidity environment, preventing air intake, return air can be drawn in from the top air intake duct, ensuring normal cooling of the evaporator 300. The filling section 231 can cooperate with the air intake plate 232 to form an air intake channel and can support the evaporator cover 210, making the fixation of the evaporator 300 more reliable. As a component supporting the evaporator cover 210, a filling part 231 is disposed between the top of the evaporator 300 and the evaporator cover 210. When an air guide plate 232 is provided within the gap between the evaporator cover 210 and the top of the evaporator 300, the filling part 231 is located between the evaporator cover 210 and the air guide plate 232, thereby preserving the gap between the front part of the air guide plate 232 and the top of the evaporator 300 to form an air guide channel. Figure 6 It can be seen that part of the filling part 231 corresponds to the rear part of the top of the evaporator 300; part of the filling part 231 corresponds to the front part of the top of the evaporator 300, located between the front part of the top of the evaporator 300 and the air deflector 232. In this embodiment, the refrigerator 10 changes the position of the evaporator 300 in the refrigeration system from the rear of the compartment to the lower part of the freezer compartment 111, and changes the traditional vertical installation of the evaporator 300 to a horizontal placement, thereby increasing the height of the storage compartment and facilitating user operation. Furthermore, since the evaporator 300 is no longer arranged at the back, the front-to-back distance of the refrigerator 10 can be reduced, improving the utilization efficiency of the refrigerator 10's storage space. In addition, the refrigerator 10 of this embodiment can also arrange the compressor 200 and the condenser 500 behind the evaporator 300, making the freezer compartment 111 flat and improving the space utilization rate of the refrigerator 10's storage space.

[0076] In this embodiment, the air supply duct 410 of the refrigerator 10 can be located at the rear of the freezer compartment 111. Its lower end has an air outlet leading to the rear of the cooling compartment 151, and air is supplied to the freezer compartment 111 through the freezer air inlet 411 leading to the freezer compartment 111. The evaporator fan 220 (i.e., the cooling fan) is located at the air outlet of the air supply duct 410 to send air from the cooling compartment 151 into the air supply duct 410. The evaporator fan 220 is configured to be tilted at a set angle relative to the evaporator 300, which saves space and facilitates the delivery of cold air into the air supply duct 410.

[0077] The air supply duct 410 extends further upward to the rear of the cold storage compartment 112, and supplies air to the cold storage compartment 112 via the cold storage air inlet 412 leading to the cold storage compartment 112. If a variable temperature compartment 113 is provided, the air supply duct 410 can also supply air to the variable temperature compartment 113 via the variable temperature air inlet 413 leading to the variable temperature compartment 113. By distributing the cooling airflow using the air supply duct 410, each storage compartment can reach its set temperature.

[0078] In this embodiment, the return air duct 420 of the refrigerator 10 can be disposed on at least one side of the cabinet, with its upper end connected to the refrigerator compartment 112 and its lower end connected to the front of the cooling compartment 151, thereby drawing the return air from the refrigerator compartment back to the cooling compartment 151. For example, return air ducts 420 can be arranged on both sides of the cabinet, allowing return air from both sides. The return air duct 420 can be connected to both sides of the gap between the evaporator front baffle 212 and the front end of the evaporator 300, so that the return air from the refrigerator can enter from the front of the evaporator 300.

[0079] A drainage slope and a heating wire are provided at the connection between the return air duct 420 and the cooling chamber 151. The drainage slope and the heating wire work together to prevent condensation and frost from forming at this connection, thus avoiding frost blockage of the return air duct 420.

[0080] Figure 7 This is a schematic diagram of the compressor compartment 122 in a refrigerator 10 according to an embodiment of the present invention. The compressor compartment 122 is formed behind the freezer compartment 111 in the cabinet 100. The top wall of the compressor compartment 122 is located below the air duct 410 and is lower than the top of the evaporator 300. The bottom wall of the compressor compartment 122 is lower than the lowest point of the bottom wall of the refrigeration compartment 151. The compressor 200, condenser 500 and cooling fan 600 of the refrigerator 10 can be arranged laterally at intervals inside the compressor compartment 122.

[0081] The bottom wall of the freezer compartment 111, at the rear of the refrigeration compartment 151, can extend upwards at an angle to provide space for the compressor compartment 122. The height of the evaporator can be set to be between 250 mm and 310 mm from the top surface of the evaporator 300 to the ground of the refrigerator 10. This specific range ensures the arrangement requirements of the evaporator 300, compressor 200, and condenser 500, while also ensuring that the height of the freezer compartment 111 at the bottom of the refrigerator 10 is convenient for users to access items.

[0082] The bottom wall of the refrigeration compartment 151 is concave from all sides to the center, and a drain hole 225 is provided at the lowest point. Furthermore, an evaporating dish 700 can be installed inside the compressor compartment 122 of the refrigerator 10, and the evaporating dish 700 can be located adjacent to the condenser 500. A drain pipe 227 can connect the drain hole 225 to the evaporating dish 700. For example, the drain pipe 227 can extend downwards at an angle from the drain hole 225 to the evaporating dish 700 to drain the condensate from the evaporator 300 to the evaporating dish 700.

[0083] The inclination angle of the aforementioned bottom wall should be sufficient to allow condensation to naturally flow into the drain hole 225. An inverted square pyramid shape can be used as an alternative to the bottom wall, with each of the four inclined planes forming an angle greater than or equal to 5° with the horizontal plane to ensure automatic condensate collection. The drain pipe 227 is placed at an angle, with the end of the drain pipe 227 connecting to the drain hole 225 higher than the end leading to the evaporator dish 700. The inclination angle of the drain pipe 227 matches the inclination angle of the bottom of the refrigeration chamber 151, allowing the condensate produced by the evaporator 300 to drain automatically. The heat from the condenser 500 is used to evaporate the water in the evaporator dish 700.

[0084] The refrigerator 10 in this embodiment can be a built-in refrigerator. To ensure overall aesthetics, the distance between the built-in refrigerator and the surrounding walls or cabinets is small, and heat dissipation is achieved through bottom air intake and bottom air exhaust. Heat dissipation air intakes (located on the side of the condenser 500) and heat dissipation air exhausts (located on the side of the compressor 200) can be respectively provided on the left and right sides of the bottom of the cabinet 100. A heat dissipation fan 600 is located between the condenser 500 and the compressor 200 to generate a heat dissipation airflow for cooling the condenser 500 and the compressor 200.

[0085] A heat dissipation airflow duct is formed at the bottom of the housing 100. This duct is configured so that the heat dissipation airflow enters from the front of the condenser 500 (heat dissipation air inlet), flows sequentially through the condenser 500 and compressor 200, and then exits through the front of the compressor 200 (heat dissipation air outlet). A heat insulation layer is provided between the compressor compartment 122 and the refrigeration chamber 151 to prevent heat loss. To achieve the above heat dissipation structure, a baffle strip 800 can also be installed at the bottom of the housing 100 to ensure the direction of the heat dissipation airflow.

[0086] The refrigerator 10 of this embodiment, with its optimized evaporator 300 installation structure, completely changes the existing refrigerator's structure. The evaporator 300 in the refrigeration system is moved from the rear of the compartment to the lower part of the freezer compartment 111, and the vertical installation of the evaporator 300 is changed to a horizontal placement, increasing the height of the freezer compartment 111 and facilitating user operation. Furthermore, since the evaporator 300 is no longer located at the back, the front-to-back distance of the refrigerator 10 is reduced, improving the utilization efficiency of the refrigerator 10's storage space and optimizing the storage space of the freezer compartment 111.

[0087] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A refrigerator comprising: a cabinet, a lower portion of which defines a freezing compartment, a bottom of the freezing compartment being formed with a refrigeration chamber; an evaporator, which is in the form of a flat cuboid as a whole, and is installed in the refrigeration chamber; an evaporator front baffle, which is provided at a front portion of the refrigeration chamber; an evaporator cover, which is provided at an upper portion of the evaporator; a filling portion, which is located between the evaporator cover and a top portion of the evaporator; a supply air duct, which is provided at a rear portion of the freezing compartment, has a supply air outlet opening to a rear portion of the refrigeration chamber at a lower end thereof, and supplies air to the freezing compartment through a freezing air inlet opening to the freezing compartment; and an evaporator fan, which is provided at the supply air outlet, to supply air in the refrigeration chamber into the supply air duct; the evaporator cover comprises an upper cover portion which is provided above the evaporator; and the freezing compartment is formed with a freezing storage cavity above the upper cover portion; the upper cover portion has a spacing from the top portion of the evaporator; an air guide baffle is provided in the spacing; the filling portion is arranged between the air guide baffle and the upper cover portion, so that the upper cover portion presses against the evaporator; a rear portion of the air guide baffle is in abutment with a rear portion of the top portion of the evaporator, and a front portion thereof is upwardly convex, and defines an air guide passage with the evaporator at a front portion thereof.

2. The refrigerator according to claim 1, wherein the evaporator cover further comprises an inclined portion which extends upwardly and obliquely from a top portion of the evaporator front baffle, and is in communication with the upper cover portion; a freezing return air inlet opening, which is in communication with the freezing storage cavity and the refrigeration chamber, is formed in the inclined portion.

3. The refrigerator according to claim 2, wherein the air guide baffle comprises: a rear section which is in abutment with the rear portion of the top portion of the evaporator; an inclined section which extends from a front end of the rear section; a front section which extends from a front end of the inclined section to the top portion of the evaporator, and defines the air guide passage with the top portion of the evaporator, so that a freezing return air flow from the freezing return air inlet opening is introduced into the front end of the evaporator and / or a front portion of the top end of the evaporator through the air guide passage.

4. The refrigerator according to claim 3, wherein a front end of the front section is upwardly convex, to expand an opening area of the air guide passage.

5. The refrigerator according to claim 2, wherein an air flow from the freezing return air inlet opening into the refrigeration chamber is configured to enter a spacing between the evaporator front baffle and the front end of the evaporator, and enter a heat exchange region of the evaporator from a front portion of the evaporator, or enter the heat exchange region of the evaporator from an upper portion of the evaporator.

6. The refrigerator according to claim 2, wherein the freezing return air inlet opening comprises a plurality of return air grilles which are longitudinally spaced apart, and each return air grille is provided with a shielding plate which is convex to an outer surface of the inclined portion, to prevent foreign matters from falling into the freezing return air inlet opening from above.

7. The refrigerator according to claim 1, wherein the evaporator fan is configured to have a set inclination angle with respect to the evaporator.

8. The refrigerator according to claim 1, wherein ​ The cabinet further defines at least one refrigeration compartment above the freezing compartment, and the air supply duct extends upward to the rear of the refrigeration compartment and supplies air to the refrigeration compartment through a refrigeration air inlet opening into the refrigeration compartment; and The refrigerator further comprises: A return air duct is arranged on at least one side of the cabinet, with its upper end communicating with the refrigeration compartment and its lower end communicating with the front of the refrigeration chamber, thereby guiding the return air of the refrigeration compartment back to the refrigeration chamber.

9. The refrigerator according to claim 8, wherein A variable temperature compartment is further defined in the cabinet, and the air supply duct supplies air to the variable temperature compartment through a variable temperature air inlet opening into the variable temperature compartment.

10. The refrigerator according to claim 8, wherein The opening of the refrigeration chamber communicating with the lower end of the return air duct is arranged on the side wall of the space between the evaporator front baffle and the front end of the evaporator.

11. The refrigerator according to claim 8, wherein The opening of the refrigeration chamber communicating with the lower end of the return air duct is arranged on both sides of the space between the evaporator front baffle and the front end of the evaporator, so that the refrigeration return air enters from the front of the evaporator.

12. The refrigerator according to claim 8, wherein The return air duct communicating with the refrigeration chamber is provided with a drainage slope and a heating wire.

13. The refrigerator according to claim 1, wherein The cabinet further forms a compressor chamber at the rear of the freezing compartment; The top wall of the compressor chamber is below the lower end of the air supply duct and lower than the top of the evaporator, and the bottom wall of the compressor chamber is lower than the lowest point of the bottom wall of the refrigeration chamber.

14. The refrigerator according to claim 13, further comprising: A compressor, a condenser and a cooling fan are arranged in the compressor chamber in a transverse and spaced manner.

15. The refrigerator according to claim 13, wherein The bottom wall of the refrigeration chamber is concave from the periphery to the center, and a drainage hole is formed at the lowest point; and The refrigerator further comprises: An evaporating pan arranged in the compressor chamber, and a drainage pipe connected to the drainage hole; The drainage pipe extends obliquely downward from the drainage hole to the evaporating pan to drain the condensed water of the evaporator to the evaporating pan.

16. The refrigerator according to claim 13, wherein The bottom wall of the refrigeration chamber is concave from the periphery to the center, and a drainage hole is formed at the lowest point; wherein the bottom wall is an inverted quadrangular pyramid, and the included angle between each of the four inclined surfaces and the horizontal plane is greater than or equal to 5°.

17. The refrigerator according to claim 16, further comprising: An evaporating pan arranged in the compressor chamber, and a drainage pipe connected to the drainage hole; The drainage pipe is arranged obliquely, and the end of the drainage pipe connected to the drainage hole is higher than the end leading to the evaporating pan.

18. The refrigerator according to claim 14, wherein The cabinet is provided with a cooling air inlet and a cooling air outlet on the left and right sides of the bottom, respectively; The cooling air inlet is arranged on one side of the condenser, and the cooling air outlet is arranged on one side of the compressor.

19. The refrigerator according to claim 13, wherein There is a heat insulation layer between the compressor chamber and the refrigeration chamber.

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