CN112665279B

CN112665279B - Exhaust mechanism, refrigerator and exhaust control method of refrigerator

Info

Publication number: CN112665279B
Application number: CN202011543813.7A
Authority: CN
Inventors: 徐通; 李宗照; 王丹丹; 杜景泽
Original assignee: Gree Electric Appliances Inc of Zhuhai; Hefei Kinghome Electrical Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Hefei Kinghome Electrical Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2022-04-12
Anticipated expiration: 2040-12-23
Also published as: CN112665279A

Abstract

The invention discloses an exhaust mechanism, a refrigerator and an exhaust control method of the refrigerator, relates to the technical field of refrigerators, and solves the technical problem that in the prior art, the temperature in a compartment rises again due to the fact that heat generated by the refrigerator in a defrosting period is diffused into the compartment. The air exhaust mechanism comprises a freezing fan cover and an air exhaust hole component, wherein when the freezing evaporator is in a working state, an air outlet component and an air return port component on the freezing fan cover are in an open state, and the air exhaust hole component is in a closed state; when the defrosting heater is in a working state, the air outlet assembly and the air return opening assembly are in a closed state, and the exhaust hole assembly is in a closed state; after defrosting is finished, the exhaust hole assembly is in an open state and exhausts hot air in the freezing fan cover through the exhaust hole. The exhaust mechanism of the invention can reduce the influence of heat brought by defrosting on the temperature in the chamber to the minimum by blocking heat generated by the defrosting heater and exchanging heat with gas in the chamber, thereby saving electric quantity and being beneficial to environmental protection.

Description

Exhaust mechanism, refrigerator and exhaust control method of refrigerator

Technical Field

The invention relates to the technical field of refrigerators, in particular to an exhaust mechanism, a refrigerator comprising the exhaust mechanism and an exhaust control method of the refrigerator.

Background

The refrigerator mainly generates defrosting water and defrosting heat after defrosting, wherein the defrosting water is mainly water melted after defrosting is heated, and the defrosting heat is mainly hot gas and residual heat generated during the working period of the defrosting heater. At present, the refrigerator only enables the defrosting water to flow out through a defrosting drain hole below the refrigerator, but the influence of defrosting heat generated in the defrosting period on the temperature balance of a refrigerator body is ignored.

At present, all air-cooled refrigerators in the industry face the following problems: after the air-cooled refrigerator is defrosted, a defrosting heater generates a large amount of heat during working, the defrosting heat is not discharged and can be diffused into a compartment, the temperature in the compartment rises again, the temperature in the compartment fluctuates, and the stored food or medicine is adversely affected. The requirements for this performance test in the national standard are: the second, third and fourth star-level room temperature rise in the defrosting and recovery period can not exceed 3K. Any automatic defrosting refrigerator with a freezing function must strictly comply with the national standard requirements.

Therefore, it is urgently needed to improve the existing refrigerator, and it is a technical problem to be solved by those skilled in the art that the refrigerator capable of thoroughly solving the influence of defrosting heat on the temperature balance in the compartment is provided.

Disclosure of Invention

One of the objectives of the present invention is to provide an exhaust mechanism, a refrigerator and an exhaust control method thereof, which solve the technical problem of the prior art that the temperature in the compartment rises again due to the heat generated by the refrigerator during defrosting spreading into the compartment. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.

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

the exhaust mechanism comprises a freezing fan cover and an exhaust hole component, wherein the freezing fan cover is arranged on the box body, a containing cavity is formed between the freezing fan cover and the inner wall of the box body, and the containing cavity is used for placing a freezing evaporator and a defrosting heater; the refrigerating air hood is also provided with an air outlet assembly and an air return opening assembly, and the air outlet assembly and the air return opening assembly have a first state that the air outlet and the air return opening are opened and a second state that the air outlet and the air return opening are closed; the air outlet assembly has a first state that the freezing fan cover is communicated with the air outlet and a second state that the freezing fan cover is separated from the air outlet; when the refrigeration evaporator is in a working state, the air outlet assembly and the air return opening assembly are in a first state, and the air exhaust hole assembly is in a second state; when the defrosting heater is in a working state, the air outlet assembly and the air return opening assembly are in a second state, and the exhaust hole assembly is in the second state; after defrosting is finished, the exhaust hole assembly is in a first state and exhausts hot air in the freezing fan cover through the exhaust hole.

According to a preferred embodiment, the air discharge mechanism further comprises a damper assembly having a first state in which the air discharge passage is open and a second state in which the air discharge passage is closed, and the damper assembly is in the first state when the freeze evaporator is in the operating state; the defrosting heater is in a working state and after defrosting heating is finished, the air door assembly is in a second state.

According to a preferred embodiment, the exhaust mechanism further comprises a controller, the controller is fixed on the box body, the controller is connected with the air outlet assembly, the air return opening assembly, the exhaust hole assembly and the air door assembly, and the controller controls the states of the air outlet assembly, the air return opening assembly, the exhaust hole assembly and the air door assembly.

According to a preferred embodiment, the exhaust mechanism further comprises a defrosting sensor, the defrosting sensor is arranged on the box body and used for detecting the temperature of the environment, the defrosting sensor is connected with the controller, the controller is further connected with the defrosting heater, and the controller controls the working state of the defrosting heater based on the temperature monitored by the defrosting sensor.

According to a preferred embodiment, the freezing air hood is provided with at least one set of air outlet assembly and at least one set of air return assembly, wherein the air outlet assembly comprises an air outlet and a second air door, the air return assembly comprises an air return opening and a third air door, the second air door and the third air door have an opening state and a closing state, and when the second air door and the third air door are in the opening state, the air outlet and the air return opening are in the first state, and the freezing air hood is communicated with the first compartment of the box body; and when the second air door and the third air door are in a closed state, the air outlet and the air return inlet are in a second state, and the freezing fan cover is isolated from the first chamber.

According to a preferred embodiment, the second damper and/or the third damper are connected to a moving part, the moving part is further connected to a controller, and the moving part can drive the second damper and/or the third damper to move in a direction away from or close to the air outlet and/or the air return opening under the control of the controller and enable the air outlet and/or the air return opening to be in a first state or a second state.

According to a preferred embodiment, the second air door and/or the third air door is/are rotatably arranged at the air outlet and/or the air return port, the second air door and/or the third air door is/are further connected with a controller, the second air door and/or the third air door can rotate towards the direction of opening or closing the air outlet and/or the air return port under the control of the controller, and the air outlet and/or the air return port is/are in a first state or a second state.

According to a preferred embodiment, the second damper and/or the third damper comprises a plurality of damper parts, the plurality of damper parts are further connected with a controller, the plurality of damper parts can move towards the directions far away from or close to each other under the control of the controller, and the air outlet and/or the air return opening are/is in the first state or the second state.

According to a preferred embodiment, the air outlet assembly comprises an air outlet and an air outlet switch, wherein the air outlet is arranged on the box body and communicated with the outside, the air outlet switch is arranged on the air outlet, the air outlet switch is connected with the controller and has an open state and a closed state, and when the air outlet switch is in the open state, the air outlet is in a first state and the freezing fan cover is communicated with the outside through the air outlet; when the exhaust switch is in a closed state, the exhaust hole is in a second state, and the freezing fan cover is isolated from the outside.

According to a preferred embodiment, the exhaust hole assembly further includes an exhaust control sensor provided at the exhaust hole and detecting an exhaust temperature, the exhaust control sensor being further connected to the controller and enabling the controller to control the state of the exhaust switch based on the temperature detected by the exhaust control sensor.

According to a preferred embodiment, the damper assembly comprises a first damper, the first damper is arranged on the exhaust passage, the first damper is connected with the controller and has an open state and a closed state, when the first damper is in the open state, the exhaust passage is in the open state, and the freezing fan cover is communicated with the second chamber, or the freezing fan cover is communicated with the second chamber and the third chamber; when the first air door is in a closed state, the exhaust passage is in a closed state, and the freezing fan cover is isolated from the second chamber, or the freezing fan cover is isolated from the second chamber and the third chamber.

The refrigerator provided by the invention comprises the exhaust mechanism in any technical scheme of the invention.

According to the exhaust control method of the refrigerator in any technical scheme, the defrosting heater is in a working state, and hot air generated in the defrosting period is stored in the freezing air cover by isolating the freezing air cover from the refrigerator chamber and forming a closed space; and after defrosting is finished, opening the exhaust hole and exhausting hot air in the freezing fan cover through the exhaust hole.

According to a preferred embodiment, the exhaust gas control method includes the steps of: acquiring a defrosting signal of the refrigerator; when the refrigerator generates a defrosting signal, a freezing evaporator of the refrigerator is in a closed state, an air outlet and an air return inlet are in a closed state, an exhaust hole is in a closed state, an exhaust channel is in a closed state, and a defrosting heater is in a working state; acquiring a defrosting completion signal; and when a signal of defrosting completion is obtained, the exhaust hole is in an open state.

The exhaust mechanism, the refrigerator and the exhaust control method thereof at least have the following beneficial technical effects:

the air exhaust mechanism comprises a freezing fan cover and an air exhaust hole component, wherein when the freezing evaporator is in a working state, an air outlet component and an air return port component on the freezing fan cover are in an open state, and the air exhaust hole component is in a closed state, so that gas in a compartment can be exchanged with cold air in the freezing fan cover, and normal refrigeration is ensured; when the defrosting heater is in a working state, the air outlet assembly and the air return opening assembly are in a closed state, the exhaust hole assembly is in a closed state, the freezing fan housing forms a closed space at the moment, and hot air generated in the defrosting period is stored in the freezing fan housing and cannot enter the compartment to cause the temperature of the compartment to rise; after defrosting is finished, the exhaust hole assembly is in an open state and exhausts hot air in the freezing fan cover through the exhaust hole, so that the influence of heat brought by defrosting on the temperature in the chamber is reduced to the minimum, the equipment cannot be cooled by starting the compressor again due to the rise of the temperature in the chamber, the electric quantity is saved, and the environment protection is facilitated.

The refrigerator provided by the invention comprises the exhaust mechanism of any technical scheme, so that the normal refrigeration function can be ensured, and the heat exchange between the heat generated by the defrosting heater and the gas in the refrigerator compartment can be blocked during defrosting, so that the temperature in the compartment can be prevented from rising again to cause the temperature fluctuation in the compartment.

According to the exhaust control method of the refrigerator, the defrosting heater is in a working state, and hot air generated in the defrosting period is stored in the freezing air cover by isolating the freezing air cover from the refrigerator chamber and forming a closed space; after defrosting, open the exhaust hole and discharge the steam in the freezing fan housing through the exhaust hole to can block that the heat that the defrosting heater produced carries out the heat exchange with the indoor gas in refrigerator room, the heat that will defrost to bring falls to minimum to the influence of indoor temperature in the room, makes the refrigerator can not be because of the room temperature rises and open the compressor once more and refrigerate, more practices thrift the electric quantity, does benefit to the environmental protection.

The exhaust mechanism, the refrigerator and the exhaust control method thereof solve the technical problem that the temperature in the compartment rises again because the heat generated by the refrigerator in the defrosting period is diffused into the compartment in the prior art.

Drawings

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

FIG. 1 is a side sectional view of a preferred embodiment of a refrigerator according to the present invention;

FIG. 2 is a front view of a preferred embodiment of the refrigerator of the present invention;

FIG. 3 is a rear view of a preferred embodiment of the refrigerator of the present invention;

FIG. 4 is a first schematic view of a preferred embodiment of the freezing hood of the present invention;

FIG. 5 is an exploded schematic view of FIG. 4;

FIG. 6 is a second schematic view of a preferred embodiment of the freezing hood of the present invention;

FIG. 7 is an exploded schematic view of FIG. 6;

FIG. 8 is a third schematic view of a preferred embodiment of the freezing hood of the present invention;

FIG. 9 is a fourth schematic view of a preferred embodiment of the freezing hood of the present invention;

FIG. 10 is a sectional view A-A of FIG. 9;

FIG. 11 is a fifth schematic view of a preferred embodiment of the freezing hood of the present invention;

fig. 12 is a schematic view of a first preferred embodiment of the air outlet assembly of the present invention;

fig. 13 is a schematic view of a second preferred embodiment of the air outlet assembly of the present invention;

fig. 14 is a schematic view of a third preferred embodiment of the air outlet assembly of the present invention;

fig. 15 is a schematic view of a fourth preferred embodiment of the air outlet assembly of the present invention.

In the figure: 2. a refrigeration evaporator; 3. a defrosting heater; 4. a first compartment; 5. a second compartment; 6. a third compartment; 11. a freezing fan cover; 14. a controller; 15. a defrosting sensor; 16. a drain pipe; 17. an evaporation pan; 18. an exhaust connecting pipe; 111. an air outlet; 112. an air return opening; 113. a second damper; 114. a moving part; 115. a freezing hood seat; 116. a freezing air cover; 117. a freezing fan; 118. a freeze sensor; 121. an exhaust hole; 122. an exhaust switch; 123. an exhaust gas control sensor; 124. a dust screen; 131. an exhaust passage; 132. a first damper.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The exhaust mechanism, refrigerator and exhaust control method of the present invention will be described in detail with reference to the accompanying drawings 1 to 15 and embodiments 1 to 3 of the specification.

Example 1

The present embodiment will explain the exhaust mechanism of the present invention in detail.

The present embodiment includes a freezing air hood 11 and an air outlet assembly, as shown in fig. 1 to 3. Preferably, the freezing fan housing 11 is mounted on the box body and forms a receiving cavity with the inner wall of the box body, and the receiving cavity is used for placing the freezing evaporator 2 and the defrosting heater 3. More preferably, the freezing fan housing 11 is further provided with an air outlet assembly and an air return assembly, and the air outlet assembly and the air return assembly have a first state that the air outlet 111 and the air return 112 are opened and a second state that the air outlet 111 and the air return 112 are closed; the air outlet assembly has a first state in which the freezing fan housing 11 is communicated with the air outlet 121 and a second state in which the freezing fan housing 11 is separated from the air outlet 121; when the refrigeration evaporator 2 is in a working state, the air outlet assembly and the air return opening assembly are in a first state, and the exhaust hole assembly is in a second state; when the defrosting heater 3 is in a working state, the air outlet assembly and the air return opening assembly are in a second state, and the exhaust hole assembly is in a second state; after defrosting is completed, the air outlet assembly is in the first state and exhausts hot air in the freezing air hood 11 through the air outlet 121.

In the exhaust mechanism of this embodiment, when the refrigeration evaporator 2 is in a working state, the air outlet assembly and the air return inlet assembly on the refrigeration fan housing 11 are in an open state, and the exhaust hole assembly is in a closed state, so that the gas in the compartment can be exchanged with the cold air in the refrigeration fan housing 11, thereby ensuring normal refrigeration; when the defrosting heater 3 is in a working state, the air outlet assembly and the air return inlet assembly are in a closed state, the exhaust hole assembly is in a closed state, at the moment, the freezing fan housing 11 forms a closed space, and hot air generated during defrosting is stored in the freezing fan housing 11 and cannot enter the compartment to cause temperature rise of the compartment; after defrosting is finished, the exhaust hole assembly is in an open state and exhausts hot air in the freezing air cover 11 through the exhaust hole 121, so that the influence of heat brought by defrosting on the temperature in the chamber is reduced to the minimum, the equipment cannot be cooled by starting the compressor again due to the rise of the temperature in the chamber, the electric quantity is saved, and the environment protection is facilitated. That is, the exhaust mechanism of this embodiment solves the technical problem that the heat generated during defrosting of the refrigerator in the prior art is diffused into the compartment, causing the temperature in the compartment to rise.

According to a preferred embodiment, the exhaust mechanism further includes a damper assembly having a first state in which the exhaust passage 131 is opened and a second state in which the exhaust passage 131 is closed, and the damper assembly is in the first state when the freezing evaporator 2 is in the operating state; the defrosting heater 3 is in the working state and after defrosting heating is finished, the air door assembly is in the second state. For example, as shown in fig. 1 to 3, the freezing fan housing 11 is disposed on the cabinet of the first compartment 4 of the refrigerator, an exhaust passage 131 is disposed above the freezing fan housing 11, and when the exhaust passage 131 is opened, the cold air generated by the operation of the freezing evaporator 2 can enter the second compartment 5 and the third compartment 6 through the exhaust passage 131 and exchange heat with the air in the second compartment 5 and the third compartment 6. The damper assembly has left and right doors for controlling air supply to the second and third chambers 5 and 6, respectively. Not limited thereto, the position of the air discharge passage 131 may also be changed based on the change of the position of the freezing fan housing 11. The number of damper assemblies may vary based on the variation of the refrigerator compartment. In the preferred embodiment, the first compartment 4 is, for example, a freezing compartment, the second compartment 5 is, for example, a temperature-changing compartment, and the third compartment 6 is, for example, a refrigerating compartment.

The exhaust mechanism of the preferred technical scheme of this embodiment also includes a damper assembly, and whether to exhaust to the rest compartments of the refrigerator can be controlled through the opening and closing of the damper assembly. Specifically, when the refrigeration evaporator 2 is in a working state, the air door assembly is in a first state that the exhaust passage 131 is opened, so that the air in the rest of the compartments can be exchanged with the cold air in the refrigeration fan housing 11, and normal refrigeration is ensured; the defrosting heater 3 is in operating condition and the heating of defrosting is accomplished the back, and the air door subassembly is in the second state that makes exhaust passage 131 close, can avoid the steam that produces during the defrosting to get into all the other rooms through exhaust passage 131 and cause all the other indoor temperature rises again, has further reduced the influence of the heat that the defrosting brought to the indoor temperature of room, makes equipment can not open the compressor again because of the room temperature rises and refrigerate, more practices thrift the electric quantity, does benefit to the environmental protection.

According to a preferred embodiment, the exhaust mechanism further comprises a controller 14, the controller 14 being secured to the housing, as shown in FIG. 1. Preferably, the controller 14 is connected to the air outlet assembly, the air return assembly, the air outlet assembly and the air door assembly, and controls the states of the air outlet assembly, the air return assembly, the air outlet assembly and the air door assembly through the controller 14. The controller 14 controls the states of the components, which is beneficial to realizing the intellectualization of the device. The controller 14 in the preferred embodiment is a main control board or a microcomputer in the prior art.

According to a preferred embodiment, the exhaust mechanism further comprises a frost sensor 15, the frost sensor 15 being arranged on the box and being adapted to detect the ambient temperature, as shown in fig. 1. Preferably, the defrosting sensor 15 is connected to the controller 14, the controller 14 is also connected to the defrosting heater 3, and the controller 14 controls the operating state of the defrosting heater 3 based on the temperature monitored by the defrosting sensor 15. The exhaust mechanism of the preferred technical solution of this embodiment further includes a defrosting sensor 15, the defrosting sensor 15 is used for detecting the temperature near the first compartment 4 (i.e. the freezing compartment), and when the temperature near the first compartment 4 rises back to the starting point temperature, the controller 14 controls the defrosting heater 3 to stop working, and the dripping process is started. The start-up temperature is, for example, 12 ℃.

Normally, the defrosting continuous heating time (unit is minutes) is recorded from the time when the defrosting heater 3 is switched on, and when the environmental temperature detected by the defrosting sensor 15 is more than or equal to 12 ℃, the defrosting heater 3 is switched off; if the ambient temperature detected by the defrosting sensor 15 is less than or equal to 12 ℃ within Tf (the initial value is 55 minutes), the defrosting heater 3 is immediately turned off, the dripping time is started, the defrosting time is set to be 1 hour, the defrosting heater 3 is directly turned on after 1 hour no matter the door is opened or the compressor is continuously operated within 1 hour. When the defrosting heater 3 meets the exit condition, the dripping time is started, and the preset defrosting time is recovered; the circulation is carried out in this way, and the accumulated maximum working times of the defrosting heater 3 is three times.

According to a preferred embodiment, the freezing fan housing 11 is provided with at least one set of air outlet components and at least one set of air return components. As shown in fig. 4 or 5, six groups of air outlet assemblies are arranged on the freezing air hood 11, and the six groups of air outlet assemblies are distributed at the upper end, the lower end and the middle position of the freezing air hood 11; two groups of air return assemblies are arranged on the freezing fan cover 11, and the two groups of air return assemblies are distributed at the bottom end of the freezing fan cover 11. Preferably, the air outlet assembly comprises an air outlet 111 and a second air door 113, the air return assembly comprises an air return 112 and a third air door, the second air door 113 and the third air door have an open state and a closed state, and when the second air door 113 and the third air door are in the open state, the air outlet 111 and the air return 112 are in the first state, and the freezing fan housing 11 is communicated with the first compartment 4 of the box body; when the second damper 113 and the third damper are in the closed state, the air outlet 111 and the air return opening 112 are in the second state, and the freezing fan housing 11 is isolated from the first compartment 4. More preferably, a second damper 113 is separately fixed at each air outlet 111, and a third damper is separately fixed at each air return opening 112. The second damper 113 and the third damper may be fixed by a snap, or may be fixed at the air outlet 111 and the air return opening 112 by a screw hinge. In the preferred technical scheme of the embodiment, the air outlet 111 and the air return opening 112 can be controlled to be opened or closed by the second air door 113 and the third air door, so that the refrigeration fan cover 11 can be controlled to be communicated with or isolated from the first compartment 4, normal refrigeration of the refrigerator can be ensured, the exchange between heat generated by the defrosting heater 3 and gas in the compartment during defrosting can be blocked, and the performance of the refrigerator is improved.

Preferably, the second damper 113 and/or the third damper are connected to the moving portion 114, the moving portion 114 is further connected to the controller 14, and the moving portion 114 can drive the second damper 113 and/or the third damper to move in a direction away from or close to the air outlet 111 and/or the air return opening 112 under the control of the controller 14, so that the air outlet 111 and/or the air return opening 112 are in the first state or the second state. As shown in fig. 12 or 13, the moving portion 114 moves towards the direction close to the air outlet 111 and/or the air return opening 112, so as to drive the second damper 113 and/or the third damper to move to be closely attached to the air outlet 111 and/or the air return opening 112, so as to block the air outlet 111 and/or the air return opening 112, and thus the air outlet 111 and/or the air return opening 112 is closed. Conversely, the moving portion 114 moves in a direction away from the air outlet 111 and/or the air return opening 112, so that the air outlet 111 and/or the air return opening 112 can be opened. Each of the air outlets 111 and/or the air return openings 112 may be independently controlled by the controller 14, or may be controlled by the controller 14 as a whole, as shown in fig. 12 or 13. The second damper 113 and/or the third damper are, for example, foam sponges, and the shape of the foam sponges matches the shape of the air outlet 111 and/or the air return opening 112.

Preferably, the second damper 113 and/or the third damper are rotatably disposed at the air outlet 111 and/or the air return opening 112, the second damper 113 and/or the third damper are further connected to the controller 14, the second damper 113 and/or the third damper can rotate in a direction of opening or closing the air outlet 111 and/or the air return opening 112 under the control of the controller 14, and the air outlet 111 and/or the air return opening 112 are in the first state or the second state, as shown in fig. 14. In the preferred technical solution of this embodiment, the second damper 113 and/or the third damper are rotary dampers, and the opening and closing of the air outlet 111 and/or the air return opening 112 are realized by rotation.

Preferably, the second damper 113 and/or the third damper includes a plurality of damper portions, the plurality of damper portions are further connected to the controller 14, and the plurality of damper portions are capable of moving in a direction away from or close to each other under the control of the controller 14, and make the air outlet 111 and/or the air return opening 112 in the first state or the second state. As shown in fig. 15, for example, the second damper 113 and/or the third damper of the preferred embodiment includes four damper portions, i.e., an upper damper portion, a lower damper portion, a left damper portion, a right damper portion, and a left damper portion, and the four damper portions move toward each other in a direction away from or toward each other, so that the air outlet 111 and/or the air return opening 112 are opened or closed.

It is to be understood that the structures of the air outlet assembly and the air return assembly are not limited to the above cases, and other structures are also possible as long as the air outlet 111 and the air return 112 can be opened and closed.

According to a preferred embodiment, the vent assembly includes a vent 121 and a vent switch 122, as shown in fig. 1 or 3. Preferably, the exhaust hole 121 is disposed on the box body and communicated with the outside, the exhaust switch 122 is disposed on the exhaust hole 121, the exhaust switch 122 is connected to the controller 14 and has an open state and a closed state, when the exhaust switch 122 is in the open state, the exhaust hole 121 is in the first state, and the freezing fan housing 11 is communicated with the outside through the exhaust hole 121; when the air discharge switch 122 is in the closed state, the air discharge hole 121 is in the second state, and the freezing fan housing 11 is isolated from the outside. The preferred technical scheme of this embodiment can control the opening or closing of the exhaust hole 121 through the exhaust switch 122. When the exhaust hole 121 is opened, the freezing fan housing 11 can be communicated with the outside, so that hot air in the freezing fan housing 11 is exhausted to the outside through the exhaust hole 121, and the influence of the hot air generated in the defrosting period on the indoor temperature of the refrigerator compartment is avoided; the air outlet 121 is closed to isolate the freezing air cover 11 from the outside, thereby preventing the cold air generated during the refrigeration from escaping to the outside.

According to a preferred embodiment, the vent assembly further includes a vent control sensor 123, as shown in FIG. 1. Preferably, an exhaust control sensor 123 is provided at the exhaust hole 121 and detects an exhaust temperature, and the exhaust control sensor 123 is further connected to the controller 14 and enables the controller 14 to control the state of the exhaust switch 122 based on the temperature detected by the exhaust control sensor 123. Specifically, when the exhaust control sensor 123 detects that the ambient temperature is greater than or equal to 12 ℃, the exhaust switch 122 is in an open state, and the freezing fan housing 11 performs an exhaust process; when the difference between the ambient temperature measured by the exhaust control sensor 123 and the temperature measured by the defrosting sensor 15 is less than 1 ℃, the exhaust process is finished; when the exhaust control sensor 123 detects that the ambient temperature is less than 12 ℃, the exhaust switch 122 is in a normally closed state.

According to a preferred embodiment, the vent assembly further includes a dust screen 124, as shown in FIG. 3. Preferably, a dust screen 124 is provided on the case at the port of the exhaust hole 121. In the preferred technical scheme of the embodiment, the dust screen 124 is arranged at the port of the exhaust hole 121, so that dust can be prevented from entering the exhaust hole 121 to block the exhaust hole 121, and the emission of hot air is influenced.

According to a preferred embodiment, the damper assembly includes a first damper 132, as shown in FIG. 1. Preferably, the first damper 132 is disposed on the exhaust passage 131, the first damper 132 is connected to the controller 14 and has an open state and a closed state, and when the first damper 132 is in the open state, the exhaust passage 131 is in the open state and the freezing fan housing 11 is communicated with the second compartment 5, or the freezing fan housing 11 is communicated with the second compartment 5 and the third compartment 6; when the first damper 132 is in the closed state, the exhaust passage 131 is in the closed state, and the freezing wind shield 11 is isolated from the second compartment 5, or the freezing wind shield 11 is isolated from the second compartment 5 and the third compartment 6. In the preferred embodiment, the opening and closing of the exhaust passage 131 is controlled by the opening and closing of the first damper 132, so that it is possible to control whether or not the gas in the freezing hood 11 exchanges heat with the gas in the second compartment 5 or the gas in the second compartment 5 and the gas in the third compartment 6.

Fig. 4 to 11 specifically show the structure of the freezing fan cover 11. As shown in fig. 5 or 7, the freezing fan cover 11 further includes a freezing fan cover base 115, a freezing fan cover 116, a freezing fan 117, and a freezing sensor 118. Preferably, the freezing fan housing base 115 and the freezing fan housing cover 116 are engaged with each other. The freezing hood base 115 has a groove structure in which the freezing evaporator 2 and the defrosting heater 3 are located in a receiving space formed with the case wall. The freezing fan 117 is fixed in the mounting holes of the freezing fan base 115 and the freezing fan cover 116, and the freezing fan 117 is used for accelerating the distribution of the cold air generated by the freezing evaporator 2 to each compartment and each corner of the compartment. The freeze sensor 118 is used to monitor the temperature in the first compartment 4 and feed back the monitoring structure to the controller 14, and the controller 14 controls the start and stop of the compressor based on the monitoring structure of the freeze sensor 118, thereby controlling the temperature in the first compartment 4.

Example 2

This embodiment will explain the refrigerator of the present invention in detail.

The refrigerator of the embodiment comprises the air exhaust mechanism in the technical scheme of the embodiment 1. The refrigerator of this embodiment, including the exhaust mechanism of any one of technical solutions in embodiment 1, not only can guarantee normal refrigeration function, but also can block heat exchange between the heat generated by the defrosting heater 3 and the gas in the refrigerator compartment during defrosting, so as to avoid temperature fluctuation in the compartment due to temperature rise in the compartment. The refrigerator of this embodiment solves the technical problem that the heat that the refrigerator produced during defrosting among the prior art diffuses to the indoor, causes indoor temperature to rise again.

As shown in fig. 1 or 3, the refrigerator of the present embodiment further includes a drain pipe 16, an evaporation pan 17, and an exhaust connection pipe 18. Wherein a drain pipe 16 is provided below the freezing fan housing 11, an evaporation pan 17 is located below the drain pipe 16, and the drain pipe 16 is used to discharge water generated during defrosting into the evaporation pan 17 through the drain pipe 16. The exhaust connecting pipe 18 is a hot end for evaporating the defrosting water in the evaporation pan 17, and a part of the heat generated by the compressor is dissipated in the exhaust connecting pipe 18.

Example 3

The present embodiment will explain the exhaust control method of the refrigerator of the present invention in detail.

In the exhaust control method of the refrigerator in any technical scheme of embodiment 2, the defrosting heater 3 is in a working state, and hot air generated in the defrosting period is stored in the freezing air cover 11 by isolating the freezing air cover 11 from the refrigerator chamber and forming a closed space; after defrosting is completed, the exhaust hole 121 is opened, and the hot air in the freezing air hood 11 is exhausted through the exhaust hole 121.

In the exhaust control method of the refrigerator of the embodiment, the defrosting heater 3 is in a working state, and hot air generated in the defrosting period is stored in the freezing air cover 11 by isolating the freezing air cover 11 from the refrigerator chamber and forming a closed space; after defrosting, open exhaust hole 121 and discharge the steam in freezing fan housing 11 through exhaust hole 121 to can block that the heat that defrosting heater 3 produced and the indoor gas in refrigerator room carry out the heat exchange, the heat that brings with defrosting falls to minimum to the influence of indoor temperature in room, makes the refrigerator can not start the compressor again because of the room temperature rises and refrigerate, more practices thrift the electric quantity, does benefit to the environmental protection. That is, the exhaust control method of the embodiment solves the technical problem that the temperature in the compartment rises again as the heat generated by the refrigerator during defrosting in the prior art is diffused into the compartment.

According to a preferred embodiment, the exhaust gas control method includes the steps of: acquiring a defrosting signal of the refrigerator; when the refrigerator generates a defrosting signal, the freezing evaporator 2 of the refrigerator is in a closed state, the air outlet 111 and the air return opening 112 are in a closed state, the exhaust hole 121 is in a closed state, the exhaust channel 131 is in a closed state, and the defrosting heater 3 is in a working state; acquiring a defrosting completion signal; when the defrosting completion signal is obtained, the exhaust hole 121 is brought into an open state. Preferably, the defrosting is performed based on a defrosting control rule of the refrigerator, the accumulated running time of the compressor and/or the related door opening times to meet the defrosting condition. More preferably, the defrosting rule of the refrigerator is the prior art, and is not described in detail herein.

Specifically, according to the defrosting rule, the defrosting stage is started, and the compressor and the refrigerating fan 117 are turned off; the first damper 132 is closed, the second damper 113 and the third damper on the freezing fan cover 11 are closed, and the exhaust hole 121 is closed. The defrosting heater 3 is started to enter a defrosting state, heat in the defrosting process is stored in the freezing air hood 11, and a part of the heat flows out of the drain pipe 16 to the evaporation tray 17 in a liquid state. When the temperature sensed by the defrosting sensor 15 rises to the starting point, or the running time of the defrosting heater 3 reaches 55min, the defrosting heater 3 stops working, and the water dropping process is started, the water dropping Time (TD) is set to 8 minutes, and a part of heat in the freezing fan cover 11 flows out of the drain pipe 16 to the evaporation tray 17 in a liquid state and is evaporated by the exhaust connecting pipe 18 at the hot end. After the dripping process is finished, the exhaust hole 121 is opened, and the hot air in the freezing fan housing 11 is exhausted. The exhaust process may turn on the freeze fan 117 to speed up the exhaust. When the ambient temperature measured by the exhaust control sensor 123 is higher than 12 ℃, the exhaust process is continued, and when the difference between the ambient temperature measured by the exhaust control sensor 123 and the temperature of the defrosting sensor 15 is less than 1 ℃, the exhaust process is known to be finished, the second air door 113 and the third air door on the freezing air cover 11 are opened, the compressor is normally cooled, and the exhaust hole 121 is closed. Entering the next defrosting exhaust period and circulating in the same way.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The exhaust mechanism is characterized by comprising a freezing fan cover (11) and an exhaust hole assembly, wherein the freezing fan cover (11) is arranged on a box body, a containing cavity is formed between the freezing fan cover (11) and the inner wall of the box body, and the containing cavity is used for placing a freezing evaporator (2) and a defrosting heater (3);

the refrigerating fan cover (11) is also provided with an air outlet assembly and an air return opening assembly, and the air outlet assembly and the air return opening assembly have a first state that an air outlet (111) and an air return opening (112) are opened and a second state that the air outlet (111) and the air return opening (112) are closed; the air outlet assembly has a first state that the freezing fan cover (11) is communicated with the air outlet (121) and a second state that the freezing fan cover (11) is separated from the air outlet (121); and is

When the refrigeration evaporator (2) is in a working state, the air outlet assembly and the air return opening assembly are in a first state, and the exhaust hole assembly is in a second state; when the defrosting heater (3) is in a working state, the air outlet assembly and the air return opening assembly are in a second state, and the exhaust hole assembly is in a second state; after defrosting is finished, the exhaust hole assembly is in a first state and exhausts hot air in the freezing fan cover (11) through the exhaust hole (121).

2. An exhaust mechanism according to claim 1, further comprising a damper assembly having a first state in which the exhaust passage (131) is open and a second state in which the exhaust passage (131) is closed, and wherein the damper assembly is in the first state when the freeze evaporator (2) is in the operating state; the defrosting heater (3) is in a working state and after defrosting heating is finished, the air door assembly is in a second state.

3. The exhaust mechanism according to claim 2, further comprising a controller (14), wherein the controller (14) is fixed on a box body, the controller (14) is connected with the air outlet assembly, the air return assembly, the exhaust hole assembly and the damper assembly, and controls the states of the air outlet assembly, the air return assembly, the exhaust hole assembly and the damper assembly through the controller (14).

4. The exhaust mechanism according to claim 3, further comprising a defrosting sensor (15), wherein the defrosting sensor (15) is disposed on the case and is used for detecting the ambient temperature, the defrosting sensor (15) is connected with the controller (14), the controller (14) is further connected with the defrosting heater (3), and the controller (14) controls the working state of the defrosting heater (3) based on the temperature monitored by the defrosting sensor (15).

5. The exhaust mechanism according to one of claims 1 to 4, wherein at least one set of air outlet assembly and at least one set of air return assembly are disposed on the freezing hood (11), wherein the air outlet assembly comprises an air outlet (111) and a second damper (113), the air return assembly comprises an air return opening (112) and a third damper, the second damper (113) and the third damper have an open state and a closed state, and

when the second air door (113) and the third air door are in an open state, the air outlet (111) and the air return opening (112) are in a first state, and the freezing fan cover (11) is communicated with the first compartment (4) of the box body; when the second air door (113) and the third air door are in a closed state, the air outlet (111) and the air return opening (112) are in a second state, and the freezing fan cover (11) is isolated from the first compartment (4).

6. The exhaust mechanism according to claim 5, characterized in that the second damper (113) and/or the third damper are connected to a moving part (114), the moving part (114) is further connected to a controller (14), and the moving part (114) can drive the second damper (113) and/or the third damper to move in a direction away from or close to the air outlet (111) and/or the air return opening (112) under the control of the controller (14) and make the air outlet (111) and/or the air return opening (112) in the first state or the second state.

7. The exhaust mechanism according to claim 5, wherein the second damper (113) and/or the third damper are rotatably disposed at the air outlet (111) and/or the air return opening (112), the second damper (113) and/or the third damper are further connected to a controller (14), and the second damper (113) and/or the third damper can rotate in a direction of opening or closing the air outlet (111) and/or the air return opening (112) under the control of the controller (14), so as to enable the air outlet (111) and/or the air return opening (112) to be in the first state or the second state.

8. The exhaust mechanism according to claim 5, wherein the second damper (113) and/or the third damper comprises a plurality of damper portions, the plurality of damper portions are further connected to the controller (14), the plurality of damper portions are movable in a direction away from or close to each other under the control of the controller (14), and the outlet (111) and/or the return (112) are in the first state or the second state.

9. Exhaust mechanism according to one of claims 1 to 4, characterized in that the exhaust hole assembly comprises an exhaust hole (121) and an exhaust switch (122), wherein the exhaust hole (121) is arranged on the box body and is communicated with the outside, the exhaust switch (122) is arranged on the exhaust hole (121), the exhaust switch (122) is connected with the controller (14) and has an open state and a closed state,

when the exhaust switch (122) is in an open state, the exhaust hole (121) is in a first state, and the freezing fan cover (11) is communicated with the outside through the exhaust hole (121); when the exhaust switch (122) is in a closed state, the exhaust hole (121) is in a second state, and the freezing fan cover (11) is isolated from the outside.

10. The exhaust mechanism according to claim 9, wherein the exhaust hole assembly further includes an exhaust control sensor (123), the exhaust control sensor (123) being provided at the exhaust hole (121) and detecting an exhaust temperature, the exhaust control sensor (123) being further connected to the controller (14) and enabling the controller (14) to control the state of the exhaust switch (122) based on the temperature detected by the exhaust control sensor (123).

11. An exhaust mechanism according to any one of claims 2 to 4, wherein the damper assembly includes a first damper (132), the first damper (132) being disposed in the exhaust passage (131), the first damper (132) being connected to the controller (14) and having an open state and a closed state,

when the first air door (132) is in an open state, the exhaust passage (131) is in an open state, and the freezing fan cover (11) is communicated with the second chamber (5), or the freezing fan cover (11) is communicated with the second chamber (5) and the third chamber (6); when the first air door (132) is in a closed state, the exhaust passage (131) is in a closed state, and the freezing fan cover (11) is isolated from the second chamber (5), or the freezing fan cover (11) is isolated from the second chamber (5) and the third chamber (6).

12. A refrigerator characterized by comprising the air discharge mechanism of one of claims 1 to 11.

13. An exhaust control method of a refrigerator according to claim 12, wherein the defrosting heater (3) is in an operating state, and hot air generated during defrosting is stored in the freezing air hood (11) by isolating the freezing air hood (11) from the refrigerator compartment and forming a closed space; after defrosting is finished, the exhaust hole (121) is opened, and hot air in the freezing fan cover (11) is exhausted through the exhaust hole (121).

14. The exhaust gas control method according to claim 13, characterized by comprising the steps of:

acquiring a defrosting signal of the refrigerator;

when the refrigerator generates a defrosting signal, the freezing evaporator (2) of the refrigerator is in a closed state, the air outlet (111) and the air return opening (112) are in a closed state, the exhaust hole (121) is in a closed state, the exhaust channel (131) is in a closed state, and the defrosting heater (3) is in a working state;

acquiring a defrosting completion signal;

when a signal of defrosting completion is obtained, the exhaust hole (121) is opened.