CN112762646A - Air return duct heating control device and heating control method - Google Patents
Air return duct heating control device and heating control method Download PDFInfo
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- CN112762646A CN112762646A CN202011638033.0A CN202011638033A CN112762646A CN 112762646 A CN112762646 A CN 112762646A CN 202011638033 A CN202011638033 A CN 202011638033A CN 112762646 A CN112762646 A CN 112762646A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention relates to a return air duct heating control device, which comprises: the pipe wall of the air return pipe is attached to the upper surface of the refrigerating chamber; one end of the air return pipe is communicated with an air return opening of the refrigerating chamber, and the air return opening of the refrigerating chamber is arranged on the upper end face of the refrigerating chamber and close to a refrigerating door of the refrigerating chamber; the other end of the air return pipe is communicated with the evaporator bin; the heating module is used for heating the air return pipe; the temperature sensor is arranged outside the air-cooled refrigerator; and the control module is electrically connected with the heating module, the temperature sensor and the control assembly of the refrigeration air door respectively. Through the design, when the fan stops running, the time that the backflow air conditioning enters the refrigerating chamber can be delayed, and the deicing function of the return air duct can be realized. Further, a heating control method and an air-cooled refrigerator are provided.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a return air duct heating control device and a heating control method.
Background
In the existing air-cooled refrigerator with a freezing chamber positioned at the upper part and a refrigerating chamber positioned at the lower part in the market, an evaporator bin is generally arranged at the rear part of a freezing chamber, a refrigerating air return opening is arranged at the rear part of the refrigerating chamber, and an air return channel of the refrigerating chamber is arranged in a vertically straight-through mode. The air flow of the air return channel of the refrigerating chamber returns to the evaporator bin from bottom to top in a circulating manner.
The advantages of this design are: the part is less, simple structure and cost are lower. However, this design has disadvantages, specifically: after the fan in the air-cooled refrigerator stops running, the circulation of air entering the refrigerating chamber stops. At this time, the cold air in the evaporator bin flows back to the refrigerating chamber along the refrigerating chamber return air channel which is communicated up and down, so that the problem that the supercooled cold air enters the refrigerating chamber to freeze and damage the food stored in the refrigerating chamber is caused.
Disclosure of Invention
Therefore, it is necessary to provide a return air duct heating control device for solving the problem that when the fan stops running in the existing air-cooled refrigerator with the freezing chamber at the upper part and the refrigerating chamber at the lower part, the cold air flows back to the refrigerating chamber along the return air duct of the refrigerating chamber
The utility model provides a return air duct heating control device installs in air-cooled refrigerator, and air-cooled refrigerator includes the walk-in, is located the freezer of walk-in top, is located the evaporimeter storehouse at freezer rear portion, is located the control assembly of cold-stored air door and the cold-stored air door of evaporimeter below, and return air duct heating control device includes:
the wall of the return air pipe is attached to the upper surface of the refrigerating chamber; one end of the air return pipe is communicated with an air return opening of the refrigerating chamber, and the air return opening of the refrigerating chamber is arranged on the upper end face of the refrigerating chamber and close to a refrigerating door of the refrigerating chamber; the other end of the return air pipe is communicated with the evaporator bin;
the heating module is used for heating the return air pipe;
the temperature sensor is arranged outside the air-cooled refrigerator;
and the control module is electrically connected with the heating module, the temperature sensor and the control assembly of the refrigeration air door respectively.
Above-mentioned return air duct heating control device, through the cold-stored door that sets up the return air inlet with the walk-in at the up end of walk-in and be close to the walk-in, and set up the return air duct level, so when the fan stopped operation, when the sunken air conditioning in follow evaporimeter storehouse flows back the return air duct, can not flow back to the walk-in faster along the return air duct that upper and lower direction was arranged like the air conditioning that sinks in traditional design, but in the slow removal of the return air duct that the level set up, so can delay the time that backward flow air conditioning enters into the walk-in. Meanwhile, in order to avoid the condensation of water vapor in the return air pipe by the return air cooling air, the water vapor is used for deicing the return air pipe through the heating module, the temperature sensor and the control module.
In one embodiment, the return air duct includes a first curved portion, a through portion, and a second curved portion, wherein:
the first bending part is correspondingly arranged with the air return opening of the refrigerating chamber;
the lower end surface of the straight-through part is attached to the upper end surface of the refrigerating chamber, and the upper end surface of the straight-through part is attached to the lower end surface of the freezing chamber; the second bend communicates with the evaporator sump.
In one embodiment, the heating module comprises a heating plate, which is arranged on the lower inner wall of the through-going portion.
A heating control method is applied to a return air duct heating control device and comprises the following steps:
detecting an ambient temperature value Th outside the air-cooled refrigerator through a temperature sensor;
detecting whether a control component of the refrigeration air door closes the refrigeration air door or not through a control module;
the control module controls the heating module to be opened or closed according to the ambient temperature Th outside the air-cooled refrigerator and whether the refrigerating air door control assembly closes the refrigerating air door.
In one embodiment, the control module controls the heating module to be opened or closed according to the ambient temperature Th outside the air-cooled refrigerator and whether the refrigeration damper control component closes the refrigeration damper, and includes:
after the control module obtains the ambient temperature value Th outside the air-cooled refrigerator, the ambient temperature value Th is compared with a set temperature threshold Th0, and the heating module is determined to be turned on or turned off according to the comparison result.
In one embodiment, when the ambient temperature value Th obtained by the control module outside the air-cooled refrigerator is greater than the set temperature threshold Th0, the control module controls the heating module to keep off.
In one embodiment, the heating control method further comprises:
when the ambient temperature value Th outside the air-cooled refrigerator acquired by the control module is smaller than or equal to the set temperature threshold Th0, whether the heating module is opened or closed is judged by the control module according to whether the refrigerating air door control assembly closes the refrigerating air door.
In one embodiment, the heating module is kept closed by the control module when the control module detects that the refrigeration damper controls the assembly to open the refrigeration damper.
In one embodiment, when the control module detects that the refrigeration damper controls the assembly to close the refrigeration damper, the control module opens the heating module and compares the heating time T of the heating module to the set heating time threshold T0 to determine whether the control module opens or closes the heating module.
In one embodiment, when the control module detects that the heating time T of the heating module is less than the set heating time threshold T0, the control module keeps the heating module on.
In one embodiment, the heating module is controlled to turn off by the control module when the heating module detects that the heating time T is greater than or equal to the set heating time threshold T0.
An air-cooled refrigerator comprises a return air duct heating control device and is controlled by a heating control method.
Drawings
FIG. 1 is a schematic view of an embodiment of an air-cooled refrigerator with a return air duct heating control device;
FIG. 2 is a block diagram of a return air duct heating control device according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of the return air duct in FIG. 1;
FIG. 4 is a flow chart of a heating control method in one embodiment of the present invention;
FIG. 5 is a flowchart illustrating a heating control method according to an embodiment of the present invention.
The reference numbers illustrate:
110. a refrigerating chamber; 111. an air return opening; 120. a freezing chamber; 130. an evaporator bin; 140. a refrigeration damper; 150. a return air duct heating control device; 151. a return air duct; 1510. a first curved portion; 1511. a straight-through portion; 1512. a second curved portion; 152. a heating module; 1521. heating plates; 153. a temperature sensor; 154. control module
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, fig. 1 is a schematic view illustrating an installation position of a return air duct heating control device 150 in an air-cooled refrigerator according to an embodiment of the present invention, where the return air duct heating control device 150 is installed in the air-cooled refrigerator, where the air-cooled refrigerator includes: a refrigerating compartment 110, a freezing compartment 120 located above the refrigerating compartment 110, an evaporator bin 130 located at the rear of the freezing compartment 120, a refrigerating damper 140 located below the evaporator bin 130, and a refrigerating damper control assembly.
Because in the design of the traditional air-cooled refrigerator, the air return inlet of the refrigerating chamber is arranged at the rear part of the refrigerating chamber, and the air return channel of the refrigerating chamber is arranged in a vertically straight-through manner. The airflow circulation of the return air channel of the refrigerating chamber returns to the evaporator bin from bottom to top, and after a fan in the air-cooled refrigerator stops running, cold air in the evaporator bin flows back to the refrigerating chamber along the refrigerating chamber return air channel which is communicated up and down, so that the problem that the cold air which is too cold enters the refrigerating chamber to freeze food stored in the refrigerating chamber is caused.
To improve this problem, referring to fig. 1 and 2, an embodiment of the present invention provides a return air duct heating control device 150, including: a return air duct 151, a heating module 152, a temperature sensor 153, and a control module 154. The present invention discharges the air flow discharged from the air return opening 111 of the refrigerating compartment 110 to the evaporator bin 130 through the air return duct 151 by changing the installation position of the air return opening 111 of the refrigerating compartment 110.
The present invention can prevent cold air in the evaporator bin 130 from flowing back to the refrigerating compartment 110 after the fan stops operating by changing the position of the air return opening 111 of the refrigerating compartment 110 and rearranging the position of the air return pipe 151. Meanwhile, the problem of icing in the return air duct 151 can be solved well by the heating module 152, the temperature sensor 153 and the control module 154.
Specifically, the duct wall of the return duct 151 is attached to the upper surface of the refrigerating compartment 110. It is understood that the air-cooled refrigerator is designed with a space between the freezing chamber 120 and the refrigerating chamber 110, and thus the return duct 151 can be disposed between the freezing chamber 120 and the refrigerating chamber 110. Meanwhile, as the pipe wall of the air return pipe 151 is attached to the refrigerating chamber 110, the air return pipe 151 can be in a horizontal position, and therefore cold air is difficult to flow back to the inner cavity of the refrigerating chamber 110 from the horizontal air return pipe 151. One end of the air return duct 151 is communicated with the air return opening 111 of the refrigerating chamber 110, wherein the design position of the air return opening 111 of the refrigerating chamber 110 is different from the conventional arrangement position, the air return opening 111 of the refrigerating chamber 110 is arranged on the upper end surface of the refrigerating chamber 110 and is close to the refrigerating door of the refrigerating chamber 110, and the other end of the air return duct 151 is communicated with the evaporator bin 130.
Because the air return opening 111 of the refrigerating chamber 110 is arranged at the upper end of the refrigerating chamber 110, and the air return pipe 151 is in a horizontal state, after the fan stops running, the cold air in the evaporator bin 130 does not enter the refrigerating chamber faster along the air return pipe but moves in the air return pipe 151 more slowly along the air return pipe when the cold air sinks, so that the problem that the food is frozen by the cold air flowing into the refrigerating chamber 110 along the air return pipe 151 can be delayed.
In the working process of the air-cooled refrigerator, when the airflow of the refrigerating chamber 110 flows through the air return pipe 151, because the airflow contains water vapor, the water vapor in the airflow may meet with cold air entering the air return pipe 151, so that the inner wall of the air return pipe 151 is frozen, and when the ice layer is too thick, the air return efficiency of the air return pipe 151 is affected, so that the refrigerating efficiency of the refrigerating chamber 110 is reduced.
In order to solve the problem of icing on the inner wall of the return air duct 151, the return air duct heating control device 150 includes: the heating module 152, the temperature sensor 153 and the control module 154, wherein the control module 154 is electrically connected to the heating module 152 and the temperature sensor 153, respectively. Specifically, the heating module 152 is configured to heat the air return pipe 151, the temperature sensor 153 is installed outside the air-cooled refrigerator and configured to detect an external ambient temperature of the refrigerator, and the control module 154 determines whether to turn on or turn off the heating module 152 by obtaining an ambient temperature value detected by the temperature sensor 153.
In one embodiment, the air return duct 151 is disposed between the refrigerating compartment 110 and the freezing compartment 120 along a spiral shape, wherein one end of the air return duct 151 corresponds to the air return opening 111 of the refrigerating compartment 110, and the other end of the air return opening 111 communicates with the evaporator bin 130. The spiral design of the air return duct 151 has the advantages that when cold air in the evaporator bin 130 enters the air return duct 151, the air return duct 151 is reversed for multiple times, the flow resistance is large, the flow speed is high, and the time that the returned cold air enters the air return opening 111 of the refrigerating chamber 110 can be delayed.
In another embodiment, the end of the return air inlet 111 communicating with the evaporator chamber 130 is disposed to extend horizontally, so as to be perpendicular to the flow direction of the cold air in the evaporator chamber 130. When the fan is stopped, the sinking cold air is difficult to enter the return air inlet 111.
In one embodiment, referring to fig. 3, the return air duct 151 includes: a first curved portion 1510, a through portion 1511, and a second curved portion 1512. The first bending portion 1510 has a bending angle of 90 degrees, i.e., an included angle between the first bending portion and the through portion 1511 is 90 degrees, the inlet of the first bending portion 1510 is installed corresponding to the air return opening 111 of the refrigerating chamber 110, the upper end surface of the through portion 1511 is attached to the lower end surface of the freezing chamber 120, the lower end surface of the through portion 1511 is attached to the upper end surface of the refrigerating chamber 110, the second bending portion has a bending angle of 90 degrees, i.e., an included angle between the second bending portion 1512 and the through portion 1511 is 90 degrees, and the outlet of the second bending portion 1512 is communicated with the evaporator bin 130. The advantage of this design is that first the first bending portion 1510 corresponds to the air return opening 111 of the refrigerating compartment 110, so that the return air of the refrigerating compartment 110 can directly enter the return air duct 151 along the first bending portion 1510; secondly, the straight-through part 1511 is attached to the lower end surface of the freezing chamber 120 and the upper end of the refrigerating chamber 110, so that the air return pipe 151 can be fixed, and the straight-through part 1511 can enable the air flow flowing out of the air return opening 111 of the refrigerating chamber 110 to enter the evaporator bin 130 more quickly, thereby improving the refrigerating efficiency of the refrigerating chamber 110.
In one embodiment, referring to fig. 1 and 3, the heating module 152 includes a heating plate 1521, wherein the heating plate 1521 is disposed on a lower inner wall of the through portion 1511. Since the interior of the return air duct is generally frozen on the lower inner wall, the heating plate 1521 is disposed on the lower inner wall of the through portion 1511, so that the deicing effect can be achieved well.
For the return air duct heating control device 150 provided by the present invention, the present invention further provides a heating control method, as shown in fig. 4, which specifically includes the following steps:
detecting an ambient temperature value Th outside the air-cooled refrigerator through a temperature sensor 153;
detecting by the control module 154 whether the control component of the refrigeration damper 140 is closing the refrigeration damper 140;
the opening or closing of the heating module 152 is controlled by the control module 154 based on the ambient temperature value Th outside the air-cooled refrigerator and whether the refrigeration damper control assembly closes the refrigeration damper 140.
Since the returned cold air is likely to freeze in the return air duct 151 after entering the return air duct 151 when the ambient temperature is low and the refrigeration damper 140 is in the closed state, the return air duct 151 needs to be heated in this case. The ambient temperature Th outside the air-cooled refrigerator can be detected in real time by the temperature sensor 153, and the detected ambient temperature Th is transmitted to the control module 154. The control module 154 then determines whether to turn on or off the heating module 152 based on the current open or closed status of the refrigeration damper 140 as determined by the control components of the refrigeration damper 140. Here, the initial state of the heating module 152 is an off state.
In one embodiment, the control module 154 controls the opening or closing of the heating module 152 according to the ambient temperature Th outside the air-cooled refrigerator and whether the refrigeration damper control assembly closes the refrigeration damper 140, including:
after the ambient temperature Th outside the air-cooled refrigerator is obtained by the control module 154, the ambient temperature Th is compared with a set temperature threshold Th0, and the heating module 152 is determined to be turned on or off according to the comparison result.
To better quantify the lower ambient temperature value, and to facilitate control module 154 making a determination based on current ambient temperature value Th, temperature threshold Th0 is set. By comparing the ambient temperature Th obtained by the control module 154 with the set temperature threshold Th0, the control module 154 can determine the current ambient temperature condition and make the next determination.
In one embodiment, when the ambient temperature Th obtained by the control module 154 outside the air-cooled refrigerator is greater than the set temperature threshold Th0, the control module 154 controls the heating module 152 to remain off.
When the control module 154 obtains that the ambient temperature value Th outside the air-cooled refrigerator is greater than the set temperature threshold Th0, it indicates that the current ambient temperature is higher, the probability of icing in the air return duct 151 is lower, and at this time, the control module 154 keeps the heating module 152 closed.
In one embodiment, when the ambient temperature Th obtained by the control module 154 is less than or equal to the set temperature threshold Th0, whether the heating module 152 is turned on or off is determined by the control module 154 based on whether the refrigeration damper control assembly is turning off the refrigeration damper 140.
Although the ambient temperature value Th outside the refrigerator at this time is less than or equal to the set temperature threshold value Th0, the refrigerating damper 140 is not necessarily in the closed state at this time. If the refrigeration damper 140 is not closed at this time, and the heating module 152 heats the air flow in the return air duct 151, the heated air flow enters the evaporator bin 130 from the return air duct 151, and the temperature change of the evaporator bin 130 and the refrigeration effect of the air-cooled refrigerator are affected.
Further, in one embodiment, the heating module 152 is kept closed by the control module 154 when the refrigeration damper control assembly is detected by the control module 154 to open the refrigeration damper 140.
Since the refrigeration damper 140 is not closed at this time, the air-cooled refrigerator continues to cool the refrigerated compartment 110, and therefore the control module 154 need not turn on the heating module 152.
In another embodiment, when the control module 154 detects that the refrigeration damper control assembly is closing the refrigeration damper 140, the control module 154 opens the heating module 152 and compares the heating time T of the heating module 152 to the set heating time threshold T0 to determine whether the control module 154 is opening or closing the heating module 152.
When the control module 154 detects that the external environment temperature Th of the air-cooled refrigerator is less than or equal to the set temperature threshold Th0 and the control module 154 detects that the air door of the refrigeration door is closed, it indicates that the cold air from the evaporator bin 130 may enter the return air duct 151 and cause the water vapor in the return air duct 151 to pre-cool and freeze. Therefore, it is necessary to turn on the heating module 152 to de-ice the return air duct 151. To avoid the heating module 152 from continuously heating and affecting the cooling effect of the evaporator sump 130, it is necessary to limit the operation time of the heating module 152. The control module 154 detects the heating time T of the heating module 152, and by comparing the detected heating time T of the heating module 152 with a set heating time threshold T0, the heating time of the heating module 152 can be controlled by the control module 154.
In one embodiment, when the control module 154 detects that the heating time T of the heating module 152 is less than the set heating time threshold T0, the control module 154 keeps the heating module 152 on.
In another embodiment, the heating module 152 is controlled to turn off by the control module 154 when the heating time T of the heating module 152 is detected by the control module 154 to be greater than or equal to the set heating time threshold T0.
It should be noted that the control module 154 of the present invention obtains the ambient temperature Th transmitted by the temperature sensor 153 and the opening state of the refrigerating damper 140 in real time.
For example, in the A-th test, the control module 154 causes the heating module 152 to operate based on the A-th ambient temperature value and the open state of the refrigeration damper 140. In the (a +1) th detection process, if the control module 154 still determines to turn on the heating module 152, at this time, the control module 154 detects whether the time T from the (a +1) th detection of the heating module 152 at the a th time is less than T0, and if T is less than T0, the heating module 152 continues to heat; if the heating time T of the heating module 152 is greater than or equal to T0, the heating module 152 is controlled to turn off by the control module 154.
If the control module 154 determines that the opening condition of the heating module 152 is not satisfied at this time based on the ambient temperature value at the (a +1) th time and the opening state of the refrigerating door during the (a +1) th detection process, the control module 154 turns off the heating module 152.
In an embodiment, the present invention further provides an air-cooled refrigerator, wherein the air-cooled refrigerator includes the above-mentioned return air duct heating control device 150, and controls the return air duct heating control device 150 by the above-mentioned heating control method, as shown in fig. 5. The heating control method comprises the following steps:
step S210: detecting an ambient temperature value Th outside the air-cooled refrigerator through a temperature sensor 153;
step S220: comparing the obtained ambient temperature value Th with a set ambient threshold value Th0 by the control module 154; when the ambient temperature value Th is greater than Th0, step S221 is executed: turning off the heating module 152 by the control module 154 and returning to step S210; when the ambient temperature value is less than or equal to Th0, proceeding to the next step;
step S230: when the opening of the refrigerating damper 140 is acquired by the control module 154, step S221 is performed: turning off the heating module 152 by the control module 154 and returning to step S210; when the closing of the refrigerating damper 140 is acquired by the control module 154, step S231 is performed: the heating module 152 is turned on by the control module 154;
step S240: comparing, by the control module 154, the on-time T of the heating module 152 to a set time threshold T0; when the on-time T of the heating module 152 is less than T0, the control module 154 keeps the heating module 152 heated and returns to step S210; when the on time T of the heating module 152 is greater than or equal to T0, step S221 is executed: the heating module 152 is turned off by the control module 154 and returns to step S210.
In the above process, wherein initially, the heating module 152 is in an off state.
According to the invention, the arrangement position of the air return opening 111 of the refrigerating chamber 110 is improved, and the problem that cold air flows back to the refrigerating chamber 110 from the air return pipe 151 under the condition that the fan stops rotating can be better solved through the air return duct heating control device 150 and the heating method, and the problem that the air return pipe 151 freezes is solved in time.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. The utility model provides a return air duct heating control device installs in air-cooled refrigerator, air-cooled refrigerator includes the walk-in, is located the freezer of walk-in top is located the evaporimeter storehouse at freezer rear portion is located the cold-stored air door of evaporimeter storehouse below reaches the control assembly of cold-stored air door, its characterized in that, the device includes:
the pipe wall of the air return pipe is attached to the upper surface of the refrigerating chamber; one end of the air return pipe is communicated with an air return opening of the refrigerating chamber, and the air return opening of the refrigerating chamber is arranged on the upper end face of the refrigerating chamber and close to a refrigerating door of the refrigerating chamber; the other end of the air return pipe is communicated with the evaporator bin;
the heating module is used for heating the air return pipe;
the temperature sensor is arranged outside the air-cooled refrigerator;
and the control module is electrically connected with the heating module, the temperature sensor and the control assembly of the refrigeration air door respectively.
2. The device of claim 1, wherein the return air duct comprises a first bend, a straight through, and a second bend, wherein:
the first bending part is correspondingly arranged with the air return opening of the refrigerating chamber;
the lower end face of the straight-through part is attached to the upper end face of the refrigerating chamber, and the upper end face of the straight-through part is attached to the lower end face of the freezing chamber;
the second bend communicates with the evaporator bin.
3. The device of claim 2, wherein the heating module comprises a heating plate disposed on a lower inner wall of the through-penetration.
4. A heating control method applied to the return air duct heating control device according to claim 1, the method comprising:
detecting an ambient temperature value Th outside the air-cooled refrigerator through the temperature sensor;
detecting, by the control module, whether a control component of the refrigeration damper closes the refrigeration damper;
and controlling the heating module to be opened or closed by the control module according to the ambient temperature value Th outside the air-cooled refrigerator and whether the refrigerating air door is closed by the refrigerating air door control module.
5. The method of claim 4, wherein controlling the opening or closing of the heating module by the control module based on the ambient temperature value outside the air-cooled refrigerator Th and whether the refrigeration damper control assembly closes the refrigeration damper comprises:
and after the control module acquires the ambient temperature value Th outside the air-cooled refrigerator, comparing the ambient temperature value Th with a set temperature threshold value Th0, and determining the opening or closing of the heating module according to the comparison result.
6. The method according to claim 5, characterized in that when the ambient temperature value Th obtained by the control module outside the air-cooled refrigerator is greater than the set temperature threshold Th0, the control module controls the heating module to remain off.
7. The method of claim 5, further comprising:
when the ambient temperature value Th outside the air-cooled refrigerator obtained by the control module is smaller than or equal to the set temperature threshold Th0, whether the heating module is opened or closed is judged by the control module according to whether the refrigerating air door is closed by the refrigerating air door control assembly.
8. The method of claim 7, wherein the heating module is kept closed by the control module when it is detected by the control module that the refrigeration damper control assembly is opening the refrigeration damper.
9. The method of claim 7, wherein when it is detected by the control module that the refrigeration damper control assembly is closing the refrigeration damper, the control module opens the heating module and compares the heating time T of the heating module to a set heating time threshold T0 to determine whether the control module opens or closes the heating module.
10. The method of claim 9, wherein the heating module is kept on by the control module when it is detected by the control module that the heating time T of the heating module is less than the set heating time threshold T0.
11. The method of claim 10, wherein the heating module is controlled to turn off by the control module when it is detected by the control module that the heating time T of the heating module is greater than or equal to the set heating time threshold T0.
12. An air-cooled refrigerator comprising the return duct heating control device according to any one of claims 1 to 3 and controlled by the heating control method according to any one of claims 4 to 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638033.0A CN112762646A (en) | 2020-12-31 | 2020-12-31 | Air return duct heating control device and heating control method |
| PCT/CN2021/111409 WO2022142351A1 (en) | 2020-12-31 | 2021-08-09 | Air return duct heating control device and heating control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011638033.0A CN112762646A (en) | 2020-12-31 | 2020-12-31 | Air return duct heating control device and heating control method |
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| CN112762646A true CN112762646A (en) | 2021-05-07 |
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| CN202011638033.0A Pending CN112762646A (en) | 2020-12-31 | 2020-12-31 | Air return duct heating control device and heating control method |
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| WO (1) | WO2022142351A1 (en) |
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| WO2022142351A1 (en) * | 2020-12-31 | 2022-07-07 | Tcl家用电器（合肥）有限公司 | Air return duct heating control device and heating control method |
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Application publication date: 20210507 |