Vehicle-mounted refrigerator

Abstract

The utility model relates to a vehicle-mounted refrigerator which comprises a refrigerator body, a refrigerator door and a refrigerator door, the refrigerator body is provided with a refrigeration cavity and a first containing cavity, and the refrigeration cavity and the first containing cavity are arranged in a separated mode; the first evaporator is arranged in the first accommodating cavity; the first fan is arranged in the first containing cavity, the first fan comprises a first air inlet and a first air outlet, and the first air outlet communicates with the refrigeration cavity; the air duct assembly is arranged in the first containing cavity and comprises a pipeline extending to the refrigerating cavity from the first air inlet, the first end of the pipeline is connected with the refrigerating cavity, and the second end of the pipeline is connected with the first air inlet. Due to the fact that air near the wall face of the refrigerator body and air in the center of the refrigeration cavity are subjected to forced convection heat exchange, cold energy of the wall face of the refrigerator body can be conducted to the center of the refrigeration cavity more quickly, the temperature of the center of the refrigeration cavity is lowered quickly, and the temperature uniformity of the refrigeration cavity of the refrigerator is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle refrigerator technology, and more particularly to a vehicle refrigerator. Background Technology

[0002] Most existing car refrigerators are direct-cooling. The evaporator used in direct-cooling car refrigerators is directly installed and fixed on the inner wall of the cabinet. This causes the cooling speed near the cabinet wall to be much faster than that in the center of the cabinet, resulting in uneven cooling inside the car refrigerator. At the same time, since the heat exchange method of direct-cooling refrigerators is natural convection heat exchange, the heat exchange efficiency is low, resulting in a slow cooling speed. Utility Model Content

[0003] This application provides a vehicle refrigerator to solve the technical problem of slow and uneven cooling caused by the low heat exchange efficiency of natural convection in existing direct-cooling vehicle refrigerators, where the cooling speed near the wall of the refrigerator is much faster than that at the center of the internal space.

[0004] In a first aspect, this application provides a vehicle-mounted refrigerator, comprising:

[0005] The housing has a refrigeration chamber and a first receiving chamber, which are arranged separately.

[0006] The first evaporator is disposed in the first accommodating cavity. The first evaporator can exchange heat with the wall of the housing to form cold air in the refrigeration cavity.

[0007] A first fan is disposed in a first accommodating cavity. The first fan includes a first air inlet and a first air outlet, and the first air outlet is connected to the cooling cavity.

[0008] The air duct assembly is disposed in the first accommodating cavity. The air duct assembly includes a pipe extending from the first air inlet to the cooling cavity. The first end of the air duct is connected to the cooling cavity, and the second end of the air duct is connected to the first air inlet.

[0009] The first fan is used to send high-speed airflow into the cooling chamber and drive the cold air in the cooling chamber to flow from the second end of the pipe to the first fan and then into the cooling chamber, thereby forming a circulating airflow in the vehicle refrigerator.

[0010] In one possible implementation, a first vent is provided at the first end of the pipe, and a second air inlet is provided on the housing that communicates with the cooling chamber, with the first vent and the second air inlet correspondingly connected.

[0011] The first fan includes a housing and an impeller. The impeller is disposed inside the housing. A first air inlet is provided on the housing. A second vent is provided at the second end of the duct. The second vent is connected to the first air inlet.

[0012] The casing has a first air outlet, and the box has a second air outlet that communicates with the cooling chamber. The second air outlet is connected to the first air outlet.

[0013] In one possible implementation, the second air inlet and the second air outlet are positioned opposite each other in the horizontal direction.

[0014] In one possible implementation, a first groove is provided on the housing, the second end of the pipe is embedded in the first groove, and the first air inlet is provided at the first groove.

[0015] In one possible implementation, a first wall is provided on the side of the impeller near the housing, and a second wall is provided on the side of the housing near the impeller. There is a gap between the first wall and the second wall, and the gap ranges from 0.5 mm to 3.5 mm.

[0016] In one possible implementation, a third air inlet is provided on the first wall surface, and the first air inlet is provided on the second wall surface, with the first air inlet and the third air inlet correspondingly connected; multiple third air outlets are provided on the periphery of the impeller, and the multiple third air outlets are evenly arranged in the circumferential direction of the impeller, with the third air outlets correspondingly connected to the first air outlet.

[0017] In one possible implementation, a baffle is provided on the housing, and the orthographic projection of the baffle onto the vertical plane covers the orthographic projection of the impeller onto the vertical plane. In another possible implementation, multiple first air outlets and multiple second air outlets are provided, with each of the multiple second air outlets corresponding to one of the multiple first air outlets.

[0018] In one possible implementation, the air duct assembly further includes a first ventilation grille disposed at a first ventilation opening; and / or, a second ventilation grille is disposed at the first air outlet of the housing.

[0019] In one possible implementation, the duct assembly further includes a second evaporator disposed within the duct to allow heat exchange between the airflow within the duct and the second evaporator when the first fan is operating.

[0020] In one possible implementation, a heat insulation layer is provided inside the first accommodating cavity, and the heat insulation layer is arranged around the cooling cavity.

[0021] The technical solutions provided in this application have the following advantages compared with the prior art:

[0022] The vehicle-mounted refrigerator provided in this embodiment generates a stable, high-pressure, high-speed airflow when the first fan is running. This high-speed airflow enters the refrigeration chamber from the first outlet of the first fan, driving the cold air in the refrigeration chamber to flow from the second end of the pipe to the first fan and then back into the refrigeration chamber, thus forming a circulating airflow within the vehicle-mounted refrigerator. During this airflow circulation, the heat load exchanges heat with the cold air, resulting in cooling. Simultaneously, heat conduction occurs between the first evaporator and the wall of the refrigerator body, transferring the cooling energy from the first evaporator to the wall of the refrigerator body. Due to forced convection heat exchange between the air near the wall of the refrigerator body and the air in the center of the refrigeration chamber, the cooling energy from the wall of the refrigerator body can be conducted to the center of the refrigeration chamber more quickly, causing the center temperature of the refrigeration chamber to drop rapidly. This improves the temperature uniformity of the refrigerator's refrigeration chamber, increases the cooling speed, and enhances the heat exchange efficiency. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0026] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted refrigerator provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 The front view of the vehicle refrigerator is shown.

[0028] Figure 3 For along Figure 2 A cross-sectional view along the AA direction;

[0029] Figure 4 for Figure 1 The diagram shown illustrates the working state of the vehicle-mounted refrigerator, where the cover is not shown and the arrows indicate the airflow direction.

[0030] Figure 5 for Figure 4 Enlarged diagram of section B;

[0031] Figure 6 for Figure 1 The diagram shows the structure of the air duct assembly of the vehicle refrigerator;

[0032] Figure 7 for Figure 1 The diagram shows the assembly of the air duct assembly and the first fan of the vehicle refrigerator.

[0033] Figure 8 for Figure 7 A schematic diagram of the housing of the first fan is shown;

[0034] Figure 9 for Figure 7 A schematic diagram of the impeller structure of the first fan is shown;

[0035] Figure 10 for Figure 1 A schematic diagram of the structure of the vehicle-mounted refrigerator's casing is shown;

[0036] Figure 11 for Figure 1 The diagram shows a three-dimensional cross-sectional view of the vehicle-mounted refrigerator.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Housing; 11. Inner panel; 12. Outer panel; 101. Cooling chamber; 102. First accommodating cavity; 103. Second air inlet; 104. Second air outlet; 105. Second accommodating cavity; 2. First evaporator; 3. First fan; 31. Impeller; 311. First wall surface; 312. Third air inlet; 313. Third air outlet; 32. Shell; 321. First groove; 322. Baffle; 323. Second ventilation grille; 324. Second wall surface; 301. First air inlet; 302. First air outlet; 4. Duct assembly; 41. Pipe; 411. First ventilation opening; 412. Second ventilation opening; 42. First ventilation grille; 43. Second evaporator; 5. Cover. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0041] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0042] To address the technical problem of slow and uneven cooling in existing direct-cooling vehicle refrigerators due to the low heat exchange efficiency of natural convection, resulting in a much faster cooling rate near the walls of the refrigerator compared to the center of the interior space, this application provides a vehicle refrigerator where forced convection heat exchange occurs between the air near the walls and the air at the center of the cooling cavity. This allows the cold air from the walls to be transferred to the center of the cooling cavity more quickly, causing the center temperature of the cooling cavity to drop rapidly. This improves the temperature uniformity of the cooling cavity, accelerates the cooling speed, and enhances heat exchange efficiency.

[0043] Figures 1 to 3 A vehicle-mounted refrigerator provided in this application includes a housing 1, a first evaporator 2, a first fan 3, and an air duct assembly 4. The housing 1 is provided with a cooling cavity 101 and a first accommodating cavity 102, which are arranged separately. The cooling cavity 101 is used to hold heat loads such as food and beverages. The first evaporator 2 is disposed in the first accommodating cavity 102, and the first evaporator 2 exchanges heat with the wall of the housing 1 to form cold air in the cooling cavity 101. The first fan 3 is disposed in the first accommodating cavity 102, and the first fan 3 includes a first air inlet 301 and a first air outlet 302. Figure 8As shown in the figure, the first air outlet 302 of the first fan 3 is connected to the cooling chamber 101; the air duct assembly 4 is disposed in the first accommodating chamber 102, and the air duct assembly 4 includes a pipe 41 extending from the first air inlet 301 to the cooling chamber 101. The first end of the pipe 41 is connected to the cooling chamber 101, and the second end of the pipe 41 is connected to the first air inlet 301 of the first fan 3; wherein, the first fan 3 is used to send high-speed airflow into the cooling chamber 101, and drive the cold air in the cooling chamber 101 to flow from the second end of the pipe 41 to the first fan 3 and then into the cooling chamber 101, thereby forming a circulating airflow in the vehicle refrigerator.

[0044] It is understandable that, such as Figure 4 As shown, when the first fan 3 is running, it generates a stable, high-pressure airflow. The high-speed airflow enters the refrigeration chamber 101 from the first air outlet 302 of the first fan 3, driving the cold air in the refrigeration chamber 101 to flow from the second end of the air duct 41 to the first fan 3 and then back into the refrigeration chamber 101, thus forming a circulating airflow inside the vehicle refrigerator. During the airflow circulation process, the heat load exchanges heat with the cold air and is cooled down. At the same time, heat conduction occurs between the first evaporator 2 and the wall of the cabinet 1, and the cold energy of the first evaporator 2 is transferred to the wall of the cabinet 1. Due to the forced convection heat exchange between the air near the wall of the cabinet 1 and the air in the center of the refrigeration chamber 101, the cold energy of the wall of the cabinet 1 can be conducted to the center of the refrigeration chamber 101 more quickly, causing the center temperature of the refrigeration chamber 101 to drop rapidly. This improves the temperature uniformity of the refrigerator's refrigeration chamber 101, increases the cooling speed, and improves the heat exchange efficiency.

[0045] Of course, the vehicle refrigerator provided in this embodiment can also work when the first fan 3 is stopped. The first evaporator 2 and the wall of the cabinet 1 transfer the cooling capacity through heat conduction. This part of the cooling capacity is transferred to the cooling cavity 101 through natural convection, thereby reducing the temperature of the heat load.

[0046] Furthermore, an insulation layer is provided within the first accommodating cavity 102, and the insulation layer is arranged around the cooling cavity 101. The insulation layer serves to block heat conduction, preventing cold air from leaking to the outside of the enclosure. For example, the insulation layer can be formed by filling and curing polyurethane prepolymer, foaming agent, catalyst, and chain extender crosslinking agent, etc., or the insulation layer can be formed by directly filling other thermal insulation materials.

[0047] Optionally, the first fan 3 is a centrifugal fan, which can pressurize the air, increase the airflow speed, and make the airflow circulation effect better, thereby enhancing the heat exchange efficiency.

[0048] For example, the box body 1 includes an inner box panel 11 and an outer box panel 12. The outer box panel 12 is sleeved around the periphery of the inner box panel 11, and a first accommodating cavity 102 is formed between the inner box panel 11 and the outer box panel 12. The box body 1 can be configured as a cylindrical shape or a square tube shape, and this application does not impose any specific limitations on this.

[0049] Specifically, the cross-section of the pipe 41 can be square. When the cabinet is cylindrical, the pipe 41 can extend along the outer wall of the inner cabinet panel 11. In a preferred embodiment, the pipe 41 can be connected to the side of the inner cabinet panel 11 facing the first accommodating cavity 102. In this case, the pipe 41 is located close to the cooling cavity 101, which shortens the flow path of the circulating airflow, reduces the pressure loss of the circulating airflow, and avoids reducing the airflow speed. This allows the cold air on the wall of the cabinet 1 to be conducted to the center of the cooling cavity 101 more quickly, and the center temperature of the cooling cavity 101 drops rapidly, thereby improving the temperature uniformity inside the refrigerator, increasing the cooling speed, and improving the heat exchange efficiency. In another embodiment, the pipe 41 can also be located in the middle of the first accommodating cavity 102.

[0050] In one embodiment, such as Figure 6 and Figure 10 As shown, a first vent 411 is provided at the first end of the pipe 41, and a second air inlet 103 connected to the cooling chamber 101 is provided on the housing 1. The first vent 411 of the pipe 41 is correspondingly connected to the second air inlet 103 of the housing 1; Figure 7 and Figure 8 As shown, the first fan 3 includes a housing 32 and an impeller 31. The impeller 31 is disposed inside the housing 32. A first air inlet 301 is provided on the housing 32. A second vent 412 is provided at the second end of the pipe 41, and the second vent 412 of the pipe 41 is correspondingly connected to the first air inlet 301. A first air outlet 302 is provided on the housing 32, and a second air outlet 104 communicating with the cooling chamber 101 is provided on the housing 1. Figure 1As shown in the diagram, the second air outlet 104 of the housing 1 is connected to the first air outlet 302. It can be understood that when the impeller 31 of the first fan 3 rotates, external air flows axially into the housing 32, pressurizing the air within the housing 32 to generate a stable, high-pressure, high-speed airflow. This high-speed airflow then flows out radially at a 90° angle, entering the cooling chamber 101 from the first air outlet 302 of the first fan 3 and the second air outlet 104 of the housing 1. This high-speed airflow drives the cold air in the cooling chamber 101 to enter the pipe 41 from the second air inlet 103 of the housing 1 and the first vent 411 of the pipe 41. Then, it enters the first air inlet 301 of the first fan 3 from the second vent 412 of the pipe 41. Under the centrifugal force of the impeller 31, a high-speed airflow is formed, thus creating a circulating airflow. During the airflow circulation process, the heat load exchanges heat with the cold air and is cooled down. At the same time, heat conduction occurs between the first evaporator 2 and the wall of the cabinet 1. The cold energy of the first evaporator 2 is transferred to the wall of the cabinet 1. Due to the forced convection heat exchange between the wall of the cabinet 1 and the air in the refrigeration cavity 101, the cold energy of the wall of the cabinet 1 can be conducted to the center of the refrigeration cavity 101 more quickly, so that the center temperature of the refrigeration cavity 101 drops rapidly, thereby improving the temperature uniformity inside the refrigerator, increasing the cooling speed, and improving the heat exchange efficiency.

[0051] The first vent 411 of the air duct 4 is connected to the second air inlet 103 of the housing 1. Specifically, the orthographic projection of the first vent 411 of the air duct 4 on the vertical plane coincides with the orthographic projection of the first air inlet 301 of the housing 32 on the vertical plane. This arrangement allows the airflow of the air duct 4 to pass more smoothly through the first air inlet 301, improving airflow circulation efficiency and accelerating the cooling speed of the cooling chamber 101.

[0052] It should be noted that the first vent 411 can be circular, rectangular, or other shapes, and this application does not impose specific limitations on it. In one example, the first vent 411 is circular, and the second air inlet 103 is correspondingly circular, so that the cold air from the cooling chamber 101 can better pass through the first vent 411 from the second air inlet 103; in another example, such as Figure 6 As shown, the first vent 411 is rectangular, and the second air inlet 103 is correspondingly rectangular. The second vent 412 can be circular, rectangular, or other shapes, and this application does not impose specific limitations on this. In a preferred example, the first fan 3 can be a centrifugal fan, and the first air inlet 301 of the centrifugal fan is circular, and the second vent 412 is correspondingly circular.

[0053] In one embodiment, the second air inlet 103 and the second air outlet 104 of the housing 1 are arranged opposite each other in the horizontal direction. For ease of explanation and understanding, as follows... Figure 10As shown, the horizontal direction can be the X direction as shown in the figure. For example, when the housing 1 is set as a square tube, the second air inlet 103 and the second air outlet 104 are respectively set on opposite sides of the housing 1. The opposite arrangement of the second air inlet 103 and the second air outlet 104 can enhance the convection effect in the cooling chamber 101, so that the cold air in the cooling chamber 101 can circulate more quickly, thereby making the temperature of the cooling chamber 101 more uniform more quickly.

[0054] Of course, the second air inlet 103 and the second air outlet 104 can also be respectively set on the adjacent sides of the housing 1.

[0055] In one embodiment, such as Figure 7 and Figure 8 As shown, a first groove 321 is provided on the housing 32, and the second end of the pipe 41 is embedded in the first groove 321. The first air inlet 301 is located at the first groove 321, so that the vertical plane where the first air inlet 301 is located is not on the same plane as the vertical plane where the first air outlet 302 is located. With this arrangement, since the housing 32 has a first groove 321 and the second end of the pipe 41 is embedded in the first groove 321, it can improve the stability of the pipe 41 assembly and also improve the aesthetics of the inner wall of the housing 1. If the housing 32 does not have a first groove 321, then a groove for installing the pipe 41 needs to be provided on the inner layer of the housing plate. With this design, there will be a protrusion inside the refrigeration cavity 101, which is not only unsightly but will also interfere with the user's access to food, beverages, and other items.

[0056] like Figure 5 As shown, the second end of the pipe 41 is embedded in the first groove 321. Specifically, the second end of the pipe 41 is tightly abutted against the first groove 321.

[0057] In one embodiment, such as Figure 5 As shown, the impeller 31 has a first wall surface 311 on the side near the housing 32, and the housing 32 has a second wall surface 324 on the side near the impeller 31. A distance t is provided between the first wall surface 311 and the second wall surface 324, and the distance t ranges from 0.5mm to 3.5mm. In this embodiment, as... Figure 9As shown, the first wall surface 311 of the impeller 31 is provided with a third air inlet 312, and the first air inlet 301 is provided on the second wall surface 324. The first air inlet 301 and the third air inlet 312 are connected accordingly. Multiple third air outlets 313 are provided on the periphery of the impeller 31. The multiple third air outlets 313 are evenly arranged in the circumferential direction of the impeller 31, and the third air outlets 313 are connected to the first air outlet 302. With this design, external air flows axially from the first air inlet 301 of the housing 32 into the third air inlet 312 of the impeller 31. After being pressurized by the impeller 31, this part of the air forms a stable, high-pressure, high-speed airflow. The high-speed airflow flows out from the third air outlet 313 of the impeller 31, and after passing through the second air outlet 104 of the housing 1 from the first air outlet 301 of the housing 32, it enters the cooling chamber 101.

[0058] It should be noted that the larger the spacing, the greater the possibility that the air discharged from the third air outlet 313 will be drawn into the third air inlet 312; conversely, the smaller the spacing, the greater the possibility of interference between the impeller 31 and the housing 32 during installation. Therefore, on the one hand, to avoid collision between the impeller 31 and the housing 32 during installation, the spacing cannot be too small; on the other hand, to reduce the possibility that the air discharged from the third air outlet 313 will be drawn into the third air inlet 312, the spacing cannot be too small. Specifically, the spacing can be set to 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc.

[0059] In one embodiment, such as Figure 8 As shown, a baffle 322 is provided on the housing 32. The baffle 322 can be arranged parallel to the vertical plane, and the orthographic projection of the baffle 322 on the vertical plane covers the orthographic projection of the impeller 31 on the vertical plane. The baffle 322 can block the side of the first fan 3, thereby reducing the possibility that the air discharged from the third air outlet 313 will be sucked back by the third air inlet 312.

[0060] Furthermore, such as Figure 5 As shown, the baffle 322 includes a third wall surface, which is disposed on the side of the baffle 322 facing the first fan 31. The third wall surface is flush with the second wall surface 324. That is to say, the third wall surface and the first wall surface also have a distance t. The range of values ​​for t is referred to the aforementioned embodiments, and will not be repeated here.

[0061] It should be noted that the baffle 322 can be fan-shaped, rectangular, or other shapes. Preferably, the baffle 322 is fan-shaped.

[0062] Multiple first air outlets 302 and multiple second air outlets 104 are provided, with each of the multiple second air outlets 104 corresponding to one of the multiple first air outlets 302. For example, as shown... Figure 8As shown, there are two first air outlets 302, located on opposite sides of the duct 41; and two second air outlets 104, corresponding one-to-one with the two first air outlets 302. By providing two first air outlets 302 and two second air outlets 104, the passage area of ​​the high-speed airflow can be increased, thereby increasing the air volume entering the cooling chamber 101, enhancing convection efficiency, and accelerating the cooling speed. Alternatively, there can be three first air outlets 302 and three corresponding second air outlets 104. The first air outlets 302 can also be annular, with the corresponding second air outlets 104 also annular.

[0063] In some embodiments, such as Figure 6 As shown, the air duct assembly 4 also includes a first ventilation grille 42, which is disposed at the first ventilation opening 411. The first ventilation grille 42 serves a ventilation function and can prevent other foreign objects from entering the duct 41 and causing blockage. In some embodiments, such as Figure 7 As shown, the first air outlet 302 of the housing 32 is provided with a second ventilation grille 323. The second ventilation grille 323 serves a ventilation function and can also prevent other foreign objects from entering the pipe 41 and causing blockage when the first fan 3 stops.

[0064] In existing technology, frost will form on the inner wall of the direct-cooling vehicle refrigerator. When the refrigerator is turned off, the frost on the inner wall will melt into condensate, which will affect the user experience.

[0065] In one embodiment, such as Figure 11 As shown, the air duct assembly 4 also includes a second evaporator 43, which is disposed inside the duct 41. When the first fan 3 is running, the airflow inside the duct 41 exchanges heat with the second evaporator 43. Understandably, when the first fan 3 is running, the circulating airflow in the duct 41 can pass over the surface of the second evaporator 43, and the second evaporator 43 exchanges heat with the circulating airflow, delivering the cooling capacity of the second evaporator 43 to the refrigerator's cooling chamber 101. The airflow passing over the surface of the second evaporator 43 greatly enhances its heat exchange capacity, improving the refrigerator's cooling ability. Simultaneously, moisture in the circulating airflow can condense on the surface of the second evaporator 43. Since the water vapor in the cooling chamber 101 is constant, the amount of frost in the duct 41 increases, and the amount of frost on the wall of the refrigerator body 1 decreases accordingly. As the airflow continues to circulate, the moisture in the cooling chamber 101 decreases, thereby reducing the probability of frost formation on the wall of the refrigerator body 1, that is, reducing the probability of condensation in the cooling chamber 101, and greatly improving the user experience.

[0066] It should be noted that both the first evaporator 2 and the second evaporator 43 can be either coiled evaporators or blown evaporators. The first evaporator 2 and the second evaporator 43 can be directly connected to form at least part of the structure in the refrigeration cycle loop. Of course, the first evaporator 2 and the second evaporator 43 can also be configured as an integrated structure, that is, part of the evaporator's piping is located in pipe 41, and the other part of the piping is located outside pipe 41.

[0067] Of course, the vehicle refrigerator provided in this embodiment can also work when the first fan 3 is stopped. The cooling capacity of the second evaporator 43 is transferred to the pipe 41 and the wall of the cabinet 1 through heat conduction. This part of the cooling capacity is transferred to the cooling cavity 101 through natural convection, thereby reducing the temperature of the heat load.

[0068] Furthermore, such as Figure 1 As shown, the vehicle refrigerator also includes a cover 5, which is rotatably mounted on the top of the body 1 to open or close the cooling chamber 101. A sealing strip may be provided on the side of the cover 5 facing the cooling chamber 101. When the cover 5 is closed on the top of the body 1, the sealing strip can improve the sealing performance and prevent the cold air in the cooling chamber 101 from leaking to the outside of the body 1.

[0069] The interior of the cover 5 can also be equipped with an insulation layer, which serves to block heat conduction and prevent cold air from leaking to the outside of the box 1.

[0070] In one embodiment, such as Figure 11 As shown, the vehicle-mounted refrigerator includes a compressor and a condenser. The cabinet is provided with a second accommodating cavity 105, in which the compressor and condenser are disposed. The first accommodating cavity 102 is arranged separately from the second accommodating cavity 105. The compressor, condenser, and first evaporator 2 are connected to form at least part of the structure in the refrigeration cycle loop. The vehicle-mounted refrigerator may also include a throttling device.

[0071] Specifically, the compressor's discharge port is connected to the refrigerant inlet of the condenser, and the compressor's suction port is connected to the refrigerant outlet of the first evaporator 2. The condenser's refrigerant outlet is connected to the refrigerant inlet of the throttling device, and the throttling device's refrigerant outlet is connected to the refrigerant inlet of the first evaporator 2. The compressor, condenser, throttling device, and first evaporator 2 form a refrigeration cycle loop. The compressor draws in low-pressure refrigerant from the first evaporator 2, raises the refrigerant from low pressure to high pressure, and continuously circulates the refrigerant in the refrigeration cycle loop. The refrigerant condenses into a high-pressure, high-temperature refrigerant liquid in the condenser. This refrigerant liquid enters the throttling device, and after being throttled, it is sent to the first evaporator 2. The low-temperature refrigerant in the first evaporator 2 exchanges heat with the wall of the housing 1, thereby cooling the refrigeration chamber 101. At the same time, the refrigerant absorbs heat and evaporates in the first evaporator 2, becoming low-pressure refrigerant vapor. The refrigerant vapor enters the compressor's inlet, realizing refrigerant circulation.

[0072] Optionally, the throttling device is used to reduce the pressure of the high-pressure refrigerant liquid from the condenser to low-pressure refrigerant liquid, while simultaneously regulating the refrigerant flow rate entering the first evaporator 2. When the throttling device is adjusted to its maximum opening, the refrigerant flow rate in the refrigeration pipeline is at its maximum. The throttling device may be, but is not limited to, a capillary tube, a throttling short tube, a thermostatic expansion valve, an electronic expansion valve, a float valve, a throttling orifice plate, a manual expansion valve, etc.

[0073] Furthermore, the vehicle refrigerator also includes a second fan, which is disposed in the second accommodating cavity 105 and is used to dissipate heat from the condenser. To facilitate heat dissipation, a heat dissipation vent may be provided on the cabinet 1, which is connected to the second accommodating cavity 105.

[0074] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a specific order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0075] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vehicle-mounted refrigerator, characterized in that, include: The housing has a cooling chamber and a first receiving chamber, which are arranged separately. The first evaporator is disposed in the first accommodating cavity and can exchange heat with the wall of the housing to form cold air in the refrigeration cavity; A first fan is disposed in the first accommodating cavity. The first fan includes a first air inlet and a first air outlet, and the first air outlet is connected to the cooling cavity. An air duct assembly is disposed in the first accommodating cavity. The air duct assembly includes a pipe extending from the first air inlet to the cooling cavity. A first end of the pipe is connected to the cooling cavity, and a second end of the pipe is connected to the first air inlet. The first fan is used to send high-speed airflow into the cooling chamber and drive the cold air in the cooling chamber to flow from the second end of the pipe to the first fan and then into the cooling chamber, thereby forming a circulating airflow in the vehicle refrigerator.

2. The vehicle-mounted refrigerator according to claim 1, characterized in that, The first end of the pipe is provided with a first vent, and the box is provided with a second air inlet that communicates with the cooling chamber. The first vent and the second air inlet are correspondingly connected. The first fan includes a housing and an impeller. The impeller is disposed inside the housing. The housing is provided with a first air inlet. The second end of the pipe is provided with a second vent, which is connected to the first air inlet. The housing is provided with a first air outlet, and the box is provided with a second air outlet that communicates with the cooling chamber. The second air outlet is correspondingly connected to the first air outlet.

3. The vehicle-mounted refrigerator according to claim 2, characterized in that, The second air inlet and the second air outlet are arranged opposite each other in the horizontal direction.

4. The vehicle-mounted refrigerator according to claim 2, characterized in that, The housing is provided with a first groove, the second end of the pipe is embedded in the first groove, and the first air inlet is provided at the first groove.

5. The vehicle-mounted refrigerator according to claim 2, characterized in that, The impeller has a first wall surface on the side near the housing, and the housing has a second wall surface on the side near the impeller. There is a gap between the first wall surface and the second wall surface, and the gap ranges from 0.5mm to 3.5mm.

6. The vehicle-mounted refrigerator according to claim 5, characterized in that, The first wall surface is provided with a third air inlet, which is located on the second wall surface. The first air inlet and the third air inlet are connected to each other. The impeller is provided with a plurality of third air outlets on its periphery. The plurality of third air outlets are evenly arranged in the circumferential direction of the impeller. The third air outlets are connected to the first air outlets.

7. The vehicle-mounted refrigerator according to claim 2, characterized in that, A baffle is provided on the housing, and the orthographic projection of the baffle on the vertical plane covers the orthographic projection of the impeller on the vertical plane.

8. The vehicle-mounted refrigerator according to claim 2, characterized in that, Multiple first air outlets and multiple second air outlets are provided, with each of the multiple second air outlets corresponding to one of the multiple first air outlets.

9. The vehicle-mounted refrigerator according to claim 2, characterized in that, The air duct assembly further includes a first ventilation grille disposed at the first ventilation opening; and / or, the first air outlet of the housing is provided with a second ventilation grille.

10. The vehicle-mounted refrigerator according to claim 1, characterized in that, The air duct assembly further includes a second evaporator disposed within the duct to allow heat exchange between the airflow within the duct and the second evaporator when the first fan is operating.

11. The vehicle-mounted refrigerator according to any one of claims 1 to 10, characterized in that, The first accommodating cavity is provided with a heat insulation layer, which is arranged around the cooling cavity.

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