Air supply and refrigeration structure of air-cooled refrigerator

Abstract

The utility model discloses an air supply and refrigeration structure of an air-cooled refrigerator, which is arranged in a shell and is provided with an air supply cavity. Comprising an air supply fan, an air return pipe, an air supply cover and a refrigeration structure composed of a compressor, an evaporator, a condenser and an expansion valve. The air supply fan, the air return pipe, the air supply cover and the evaporator are all installed in the air supply cavity. The assembly support is fixed in the air supply cavity, and the evaporator is vertically installed on the support. The air return pipe and the air supply cover are located on the two sides of the evaporator respectively, and the air return pipe is provided with an air outlet section and an air outlet through hole. The air supply fan is installed between the evaporator and the air outlet section and right faces the evaporator. A water collecting tank is arranged at the bottom of the assembling support, and an electric heater is fixedly installed behind the air supply fan. By means of the design, efficient refrigeration can be achieved, the frosting problem of the evaporator is effectively solved, the refrigeration efficiency is improved, and maintenance and cleaning are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of air-cooled refrigerators, in particular to an air supply and refrigeration structure of an air-cooled refrigerator. Background Art

[0002] In the field of modern kitchen equipment and commercial refrigeration, refrigerators are an important type of refrigeration and freezing equipment, widely used in the storage and preservation of food and beverages. Most traditional refrigerators use direct cooling, that is, the evaporator is directly in contact with the storage space (inner tank structure), and the cold is transferred through air convection. However, this traditional refrigerator has a series of disadvantages. For example, direct cooling can easily cause uneven temperature distribution inside the refrigerator, causing food close to the evaporator to be over-frozen, while food far from the evaporator may reduce the preservation effect because the temperature is not low enough. In addition, direct cooling can easily cause frost or frostbite on the surface of food, affecting food quality and sales appearance.

[0003] In order to solve these problems, air-cooled freezers came into being. They use built-in fans to force air circulation, so that the cold air is more evenly distributed in the freezer, thereby improving the refrigeration efficiency and the quality of food preservation. However, even air-cooled freezers have some areas that need to be improved. For example, the air supply structure of traditional air-cooled freezers is not arranged reasonably, which makes it difficult to ensure efficient refrigeration and transportation of the air in the freezer liner structure. It is difficult to effectively handle the frost on the evaporator surface, resulting in a poor cooling effect of the evaporator on the air, and it is very inconvenient to clean and maintain the evaporator and compressor. Utility Model Content

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the utility model is to provide an air supply and refrigeration structure for an air-cooled freezer, which can ensure efficient refrigeration of the freezer, effectively deal with the frosting problem of the evaporator and further improve the refrigeration effect, and facilitate maintenance and cleaning.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: an air supply and refrigeration structure of an air-cooled freezer is assembled in a casing, an air supply cavity is opened in the casing, including an air supply fan, a return air duct, an air supply hood and a matching combination compressor, an evaporator, a condenser and an expansion valve, and the air supply fan, the return air duct, the air supply hood and the evaporator are assembled in the air supply cavity.

[0006] An assembly bracket is fixedly connected in the air supply chamber, the evaporator is fixedly mounted on the assembly bracket and arranged in a vertical direction, the return air duct and the air supply hood are both connected to the outside of the air supply chamber, the return air duct includes an air outlet section, the air outlet section is provided with an air outlet through hole, the air outlet section and the air supply hood are respectively arranged on both sides of the evaporator, the air supply fan is assembled in the air supply chamber and arranged between the evaporator and the air outlet section, and the front side of the air supply fan is arranged opposite to the evaporator.

[0007] A water collecting trough is fixedly installed at the bottom of the assembly bracket, an electric heater is fixedly installed in the air supply cavity, and the electric heater is arranged at the rear side of the air supply fan.

[0008] In some of the implementations, in order to ensure that the air supply and refrigeration structures involved can be stably installed in the casing, to ensure stable operation of each component and to avoid mutual influence and interference, the following technical solutions are provided.

[0009] A heat dissipation cavity is provided on the side wall of the casing, an air outlet and an air inlet are respectively provided on the upper and lower sides of the heat dissipation cavity, and the condenser is fixedly installed in the heat dissipation cavity.

[0010] The casing is also provided with an installation cavity, and the compressor is fixedly installed in the installation cavity.

[0011] The side walls of the installation cavity and the air supply cavity are both provided with assembly openings, and an assembly cover is fixedly installed at the assembly openings.

[0012] In some of the implementations, in order to ensure that the compressor, evaporator, condenser, and expansion valve can be matched and combined to achieve the refrigeration effect of the refrigerator, the following technical solutions are provided.

[0013] The medium outlet of the compressor is connected to the inlet end of the condenser through a No. 1 through pipe, the medium inlet of the compressor is connected to the outlet end of the evaporator through a No. 2 through pipe, the outlet end of the condenser is connected to the inlet end of the evaporator through a No. 3 through pipe, and the expansion valve is assembled on the No. 3 through pipe and arranged in the air supply chamber.

[0014] In some of the implementations, in order to facilitate the connection between the return air duct and the air supply hood and the inner liner structure of the refrigerator, so that the air in the inner liner structure can be cooled in the air supply cavity and then returned to the inner liner structure, the following technical solution is provided.

[0015] A return air vent and a supply air vent are provided on the side wall of the air supply cavity, and the return air vent and the supply air vent are arranged on the inner side of the casing.

[0016] The cross section of the return air duct is set to a U-shaped structure, and the return air duct is fixed in the air supply cavity and keeps in contact with the inner wall of the air supply cavity, the return air port keeps in communication with the return air duct, and the air supply cover keeps in communication with the air supply port.

[0017] In some of the implementations, in order to ensure that the air supply fan can be stably installed in the air supply cavity and that the air with higher temperature in the inner tank structure can be introduced to the rear of the air supply fan through the return air vent and the return air duct, the following technical solution is provided.

[0018] A vertically arranged mounting plate is fixedly installed in the air supply cavity, an air guide opening is provided on the mounting plate, and the air supply fan is fixedly installed on the mounting plate and horizontally opposite to the air guide opening.

[0019] The return air duct also includes a connecting section, and the connecting section is connected with the return air port and the air outlet section.

[0020] Beneficial effects of the utility model:

[0021] 1. Setting up a heat dissipation cavity can ensure that the condenser is stably installed therein, continuously and effectively cool the condenser, and improve the refrigeration efficiency.

[0022] 2. The installation cavity is set to ensure that the compressor is stably installed in it, which is convenient for maintenance of the compressor. The heat dissipation holes on the assembly cover can quickly discharge the heat generated by the compressor to avoid affecting other components.

[0023] 3. The return air duct and the air supply hood are connected with the inner tank structure, so that the air in the inner tank structure can be effectively refrigerated and the cold air after refrigeration can be re-input into the inner tank to cool the food and medicine.

[0024] 4. An electric heater is installed in the air supply chamber. When frost forms on the evaporator surface, the heater can be started to melt the ice to avoid affecting the cooling effect. The water collection tank collects the melted water and discharges it to prevent frost from forming again.

[0025] 5. The compressor, condenser, expansion valve and evaporator are connected in series to form an effective refrigeration cycle to continuously cool the inner tank structure.

[0026] 6. The reasonable layout of each component can avoid mutual influence and interference, ensuring stable and reliable operation of the system.

[0027] 7. The structure design is reasonable, easy to install and maintain, suitable for mass production, and reduces manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2It is a structural schematic diagram of another perspective of the utility model;

[0030] Figure 3 It is a schematic diagram of the structure of the casing of the utility model when it is in a cut-away state;

[0031] Figure 4 It is a structural diagram of the combination of compressor, evaporator, condenser and expansion valve;

[0032] Figure 5 For the Figure 4 A schematic diagram of the structure from another perspective;

[0033] Figure 6 It is a structural diagram of the combination of air supply hood, return air duct and electric heater;

[0034] Figure 7 This is a schematic diagram of the installation structure of the evaporator and the air supply fan;

[0035] Figure 8 It is a schematic diagram of the structure of the assembly bracket in the cut-away state.

[0036] In the figure: 1 casing, 11 air supply cavity, 111 assembly bracket, 112 water collecting tank, 113 drain outlet, 114 return air outlet, 115 air supply outlet, 116 mounting plate, 117 air guide outlet, 12 heat dissipation cavity, 121 exhaust outlet, 122 air inlet, 13 mounting cavity, 141 assembly outlet, 142 assembly cover, 143 heat dissipation through hole, 2 air supply fan, 31 air outlet section, 311 air outlet through hole, 32 connecting section, 4 air supply hood, 51 compressor, 52 evaporator, 53 condenser, 54 expansion valve, 55 No. 1 through pipe, 56 No. 2 through pipe, 57 No. 3 through pipe, 6 electric heater. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] See also Figure 1-8 The air supply and refrigeration structure of the air-cooled freezer is assembled in a casing 1, and an air supply cavity 11 is opened in the casing 1, including an air supply fan 2, a return air duct, an air supply hood 4, and a matching combination compressor 51, an evaporator 52, a condenser 53, and an expansion valve 54. The air supply fan 2, the return air duct, the air supply hood 4, and the evaporator 52 are assembled in the air supply cavity 11.

[0039] An assembly bracket is fixedly connected in the air supply chamber 11, and the evaporator 52 is fixedly installed on the assembly bracket and arranged in the vertical direction. The return air duct and the air supply hood 4 are connected to the outside of the air supply chamber 11. The return air duct includes an air outlet section 31, and the air outlet section 31 is provided with an air outlet through hole 311. The air outlet section 31 and the air supply hood 4 are respectively arranged on both sides of the evaporator 52. The air supply fan 2 is assembled in the air supply chamber 11 and arranged between the evaporator 52 and the air outlet section 31. The front side of the air supply fan 2 is arranged opposite to the evaporator 52.

[0040] A water collecting tank 112 is fixedly installed at the bottom of the assembly bracket, and an electric heater 6 is fixedly installed in the air supply cavity 11 . The electric heater 6 is arranged at the rear side of the air supply fan 2 .

[0041] The refrigerant is compressed into high-pressure gas in the compressor 51. During this process, the temperature and pressure of the refrigerant will increase. After that, when the high-temperature and high-pressure gaseous refrigerant passes through the condenser 53, the surrounding environment (air) absorbs heat and the refrigerant condenses into liquid. After the liquid refrigerant passes through the expansion valve 54, its pressure and temperature are reduced and it enters the evaporator 52. In the evaporator 52, due to the pressure drop, the refrigerant begins to absorb the heat in the refrigerator and evaporates. In this process, the heat inside the refrigerator is taken away, and finally the cooled cold air is collected by the air supply hood 4 through the air supply fan 2 and transported back to the inner tank of the refrigerator, so that the internal temperature drops. The evaporated refrigerant is sent back to the compressor 51 again, and the cycle starts again.

[0042] The inner side of the casing 1 is usually equipped with the inner tank structure of the refrigerator, and the return air duct and the air supply hood 4 are connected to the inner tank structure. The heat in the inner tank structure enters the air supply chamber 11 through the return air duct, and is gathered behind the air supply fan 2 through the air outlet holes 311 on the air outlet section 31 thereof. Under the continuous action of the air supply fan 2, the air with relatively high heat passes through the evaporator 52, and the refrigerant in the evaporator 52 absorbs the heat and evaporates to reduce the air temperature. The refrigerated cold air is collected by the air supply hood 4 and re-input into the inner tank structure to cool the food and medicine in the inner tank structure.

[0043] In order to prevent frost on the outer surface of the evaporator 52 from affecting the cooling effect on the air in the air supply chamber 11, an electromagnetic switch valve can be installed on the return air duct and the air supply hood 4. After the air supply hood 4 and the return air duct are closed, the electric heater 6 can heat the air remaining in the air supply chamber 11 and drive the hot air through the evaporator 52 when the air supply fan 2 is working to melt the frost attached to the evaporator 52. The melted liquid water flows downward and is collected in the water collecting tank 112. A drain outlet 113 is provided at the bottom of the water collecting tank 112. The drain outlet 113 is connected to the outside of the refrigerator through a drain pipe to discharge the melted liquid water to prevent the refrigerator from frosting again.

[0044] In order to ensure that the air supply and refrigeration structures involved can be stably installed in the housing 1, to ensure that the various components operate stably and to avoid mutual influence and interference, the following technical solutions are provided.

[0045] A heat dissipation cavity 12 is formed on the side wall of the housing 1 . An air outlet 121 and an air inlet 122 are respectively formed on the upper and lower sides of the heat dissipation cavity 12 . The condenser 53 is fixedly installed in the heat dissipation cavity 12 .

[0046] The housing 1 is further provided with an installation cavity 13 , in which the compressor 51 is fixedly installed.

[0047] The side walls of the installation cavity 13 and the air supply cavity 11 are both provided with an assembly opening 141 , and an assembly cover 142 is fixedly installed at the assembly opening 141 .

[0048] The setting of the heat dissipation chamber 12 can ensure that the condensing gas is stably installed therein. During the heat dissipation process of the condenser 53, normal temperature air in the external environment is introduced through the air inlet 122 at the bottom. After fully contacting and exchanging heat with the condenser 53, its temperature rises and is finally discharged from the exhaust port 121 at the top of the heat dissipation chamber 12. Continuous operation can effectively cool down the condenser 53.

[0049] The setting of the installation cavity 13 can ensure that the compressor 51 is stably installed therein, and the assembly opening 141 and the assembly cover 142 set on the installation cavity 13 and the air supply cavity 11 can facilitate the installation of corresponding equipment in the installation cavity 13 and the air supply cavity 11, thereby facilitating the maintenance of the compressor 51.

[0050] It should also be noted that a heat dissipation hole 143 is provided on the assembly cover 142 of the installation cavity 13 to facilitate the heat generated by the compressor 51 during operation to be dissipated.

[0051] In order to ensure that the compressor 51, the evaporator 52, the condenser 53, and the expansion valve 54 can be matched and combined to achieve a refrigeration effect on the refrigerator, the following technical solution is provided.

[0052] The medium outlet of the compressor 51 is connected to the inlet end of the condenser 53 through the No. 1 through pipe 55, the medium inlet of the compressor 51 is connected to the outlet end of the evaporator 52 through the No. 2 through pipe 56, the outlet end of the condenser 53 is connected to the inlet end of the evaporator 52 through the No. 3 through pipe 57, and the expansion valve 54 is assembled on the No. 3 through pipe 57 and arranged in the air supply chamber 11.

[0053] The compressor 51, the condenser 53, the expansion valve 54 and the evaporator 52 are stably combined and a circulation path is formed through the No. 1 through pipe 55, the No. 2 through pipe 56 and the No. 3 through pipe 57, so as to ensure that the refrigerant effectively runs along the circulation path under the continuous action of the compressor 51, absorbs heat at the position of the evaporator 52 and cools the inner tank structure, and the absorbed heat is dissipated to the external environment through the condenser 53, so as to effectively cool the air in the inner tank structure of the refrigerator.

[0054] In order to facilitate the connection between the return air duct and the air supply hood 4 and the inner liner structure of the refrigerator, so that the air in the inner liner structure is cooled in the air supply cavity 11 and then returned to the inner liner structure, the following technical solution is provided.

[0055] A return air vent 114 and a supply air vent 115 are formed on the side wall of the air supply chamber 11 . The return air vent 114 and the supply air vent 115 are arranged on the inner side of the housing 1 .

[0056] The cross section of the return air duct is set to a U-shaped structure, and the return air duct is fixed in the air supply cavity 11 and keeps in contact with the inner wall of the air supply cavity 11, the return air opening 114 keeps in communication with the return air duct, and the air supply cover 4 keeps in communication with the air supply opening 115.

[0057] The inner tank structure is assembled in the inner space of the housing 1, and the return air vent 114 and the supply air vent 115 are connected to the inner tank structure through corresponding air ducts, ensuring effective communication between the inner tank structure and the air supply cavity 11. The air with a higher temperature in the inner tank is input into the return air duct through the return air vent 114, and the cold air cooled by the evaporator 52 is re-input into the inner tank structure of the refrigerator through the air supply hood 4 and the supply air vent 115.

[0058] In order to ensure that the air supply fan 2 can be stably installed in the air supply cavity 11 and to ensure that the air with higher temperature in the inner tank structure can be introduced into the rear of the air supply fan 2 through the return air port 114 and the return air duct, the following technical solution is provided.

[0059] A vertically arranged mounting plate 116 is fixedly installed in the air supply cavity 11, and an air guide opening 117 is opened on the mounting plate 116. The air supply fan 2 is fixedly installed on the mounting plate 116 and horizontally faces the air guide opening 117;

[0060] The return air duct further includes a connecting section 32 , which is connected to the return air port 114 and the air outlet section 31 .

[0061] The arrangement of the mounting plate 116 can ensure that the air supply fan 2 is stably installed in the air supply chamber 11, and the arrangement of the air guide opening 117 on the mounting plate 116 can ensure that the air output from the return air duct outlet section 31 is effectively introduced into the evaporator 52 for cooling.

[0062] The connecting section 32 is arranged in a C-shaped structure as a whole, so that the connecting section 32 of the return air duct can fit the inner wall of the air supply cavity 11, and guide the air with higher temperature in the inner tank structure along the return air opening 114 and the connecting section 32 into the air outlet section 31 and input into the air supply cavity 11.

[0063] The air outlet section 31 is configured in an inverted U-shaped structure as a whole, so that the air outlet section 31 can be horizontally opposed to the air supply fan 2 and the evaporator 52, thereby improving the heat exchange effect between the evaporator 52 and the air.

[0064] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The air supply and refrigeration structure of the air-cooled freezer is characterized by: The invention is assembled in a casing (1), wherein an air supply chamber (11) is provided in the casing (1), comprising an air supply fan (2), an air return pipe, an air supply cover (4), and a matching combined compressor (51), an evaporator (52), a condenser (53), and an expansion valve (54); the air supply fan (2), the air return pipe, the air supply cover (4), and the evaporator (52) are assembled in the air supply chamber (11); an assembly bracket is fixedly connected in the air supply chamber (11), the evaporator (52) is fixedly mounted on the assembly bracket and arranged in a vertical direction, the air return pipe and the air supply cover (4) are both connected to the outside of the air supply chamber (11), and the The return air duct comprises an air outlet section (31), the air outlet section (31) is provided with an air outlet through hole (311), the air outlet section (31) and the air supply cover (4) are respectively arranged on both sides of the evaporator (52), the air supply fan (2) is assembled in the air supply cavity (11) and arranged between the evaporator (52) and the air outlet section (31), and the front side of the air supply fan (2) is arranged opposite to the evaporator (52); a water collecting trough (112) is fixedly installed at the bottom of the assembly bracket, an electric heater (6) is fixedly installed in the air supply cavity (11), and the electric heater (6) is arranged on the rear side of the air supply fan (2).

2. The air supply and refrigeration structure of the air-cooled freezer according to claim 1 is characterized in that: A heat dissipation cavity (12) is provided on the side wall of the casing (1), an air outlet (121) and an air inlet (122) are respectively provided on the upper and lower sides of the heat dissipation cavity (12), and the condenser (53) is fixedly installed in the heat dissipation cavity (12); an installation cavity (13) is also provided in the casing (1), and the compressor (51) is fixedly installed in the installation cavity (13); and an assembly opening (141) is provided on the side walls of the installation cavity (13) and the air supply cavity (11), and an assembly cover (142) is fixedly installed at the assembly opening (141).

3. The air supply and refrigeration structure of the air-cooled freezer according to claim 2 is characterized in that: The medium outlet of the compressor (51) is connected to the inlet end of the condenser (53) via a No. 1 through-pipe (55), the medium inlet of the compressor (51) is connected to the outlet end of the evaporator (52) via a No. 2 through-pipe (56), the outlet end of the condenser (53) is connected to the inlet end of the evaporator (52) via a No. 3 through-pipe (57), and the expansion valve (54) is mounted on the No. 3 through-pipe (57) and arranged in the air supply chamber (11).

4. The air supply and refrigeration structure of the air-cooled freezer according to claim 1 is characterized in that: A return air vent (114) and an air supply vent (115) are provided on the side wall of the air supply cavity (11), and the return air vent (114) and the air supply vent (115) are arranged on the inner side of the housing (1); the cross section of the return air duct is arranged to be a U-shaped structure, and the return air duct is fixed in the air supply cavity (11) and keeps in contact with the inner wall of the air supply cavity (11), the return air vent (114) keeps in communication with the return air duct, and the air supply cover (4) keeps in communication with the air supply vent (115).

5. The air supply and refrigeration structure of the air-cooled freezer according to claim 4 is characterized in that: A vertically arranged mounting plate (116) is fixedly installed in the air supply chamber (11), an air guide opening (117) is provided on the mounting plate (116), and the air supply fan (2) is fixedly installed on the mounting plate (116) and is horizontally opposite to the air guide opening (117); the return air duct also includes a connecting section (32), and the connecting section (32) is connected to the return air opening (114) and the air outlet section (31).

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