CN218296388U - Defrosting structure and refrigerator thereof - Google Patents
Defrosting structure and refrigerator thereof Download PDFInfo
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- CN218296388U CN218296388U CN202222270102.8U CN202222270102U CN218296388U CN 218296388 U CN218296388 U CN 218296388U CN 202222270102 U CN202222270102 U CN 202222270102U CN 218296388 U CN218296388 U CN 218296388U
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Abstract
The utility model relates to a change frost structure and refrigerator thereof belongs to refrigerator technical field, should change the frost structure, including the evaporator room, the evaporator room is provided with two at least return air duct exports that are linked together with cold-stored return air duct, is located be formed with on the indoor evaporimeter of evaporator with return air duct exports corresponding change the frost region, every change and be provided with independent change frost heater on the frost region. Reduce the inhomogeneity that the evaporimeter frosted through changing the return air mode, ensure the smooth and easy of wind path maximum time, detect the regional degree of defrosting of each defrosting through detecting the pressure differential between each return air duct and the freezing fan, when a certain frost region frosts seriously, it exports the pressure differential increase between the freezing fan to get the return air duct correspondingly, then can shut down and change the frost, only open the regional defrosting heater that corresponds of this defrosting and carry out the regional defrosting can, thereby can reduce single defrosting volume reducible temperature fluctuation.
Description
Technical Field
The utility model relates to a refrigerator technical field, concretely relates to change white structure and refrigerator thereof.
Background
When the temperature of the evaporator is lower than the dew point temperature of the air and lower than zero degree, the water vapor in the air is condensed and attached to the surface of the evaporator to form a frost layer. Along with the longer and longer running time of the refrigerator, the frost layer is thicker and thicker, the heat transfer resistance between the surface of the evaporator and air can be increased, the flow resistance of airflow passing through the evaporator is increased, the airflow passing through the evaporator is reduced, the heat exchange efficiency is reduced, and the refrigerating effect of the refrigerator is influenced.
Along with the popularization of the refrigerator in life, the performance requirements of people on the refrigerator are continuously improved, and the air-cooled frostless refrigerator is widely popularized. The air-cooled refrigerator is also called a frostless refrigerator, the frostless refrigerator does not frost, frost is automatically removed through an automatic defrosting technology, the whole process is automatically completed, and users do not need to participate, so that the use convenience is greatly improved, and the satisfaction degree of the users to products is also improved.
The evaporator of the air-cooled refrigerator is placed in an evaporator bin formed between a freezing box liner and a freezing mask, the existing defrosting heater is generally arranged at the bottom of the freezing evaporator, a refrigerating air return opening is formed in the rear part of the evaporator, and when the defrosting condition is met, the heater is electrified to work to defrost.
The position of the freezing air return inlet is generally at the lower part of the fan cover, the evaporator inlet pipe is arranged at the upper part of the freezing chamber, so that the phenomenon of uneven frosting exists in the frosting process of the refrigerator, and the frost layer generated by the outer layer of the freezing evaporator gradually diffuses and defrosts outwards from the bottom in a fan-shaped state along with the heat radiation of the heater during the defrosting of the refrigerator.
But the phenomenon that defrosting is not clean easily appears on evaporimeter upper portion and evaporimeter business turn over horizontal pipe in the actual operation in-process, and this kind of condition progressively accumulates can influence refrigerator refrigeration effect, and the serious uncooled phenomenon that can appear, and the measure of solving under the general condition is that ways such as increase heater power, extension heater operating time solve the problem, but can appear that heater surface temperature is high and operating time is long and influence the risk of safety like this, the power consumption of refrigerator increases, the refrigerator internal temperature of period of defrosting fluctuates great scheduling problem.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a defrosting structure, a refrigerator and a defrosting control method thereof to solve the technical problems existing in the prior art that the frosting of the refrigerator is not uniform and the temperature fluctuation inside the refrigerator is large during the defrosting process.
In order to achieve the above purpose, the utility model provides a following technical scheme:
according to the utility model discloses the first aspect of the embodiment provides a structure of changing frost, including the evaporator room, the evaporator room is provided with two at least return air duct exports that are linked together with cold-stored return air duct, is located be formed with on the indoor evaporimeter of evaporator with return air duct export corresponding regional, every change and be provided with independent defrosting heater on the frost region.
Further, the evaporator chamber is a space formed between the back of the refrigerator liner and the refrigeration mask and used for placing the evaporator, and the air return duct outlet is arranged on the back of the refrigerator liner.
Furthermore, a freezing fan is installed on the freezing mask, and the projection of the air suction opening of the freezing fan on the evaporator is located at the center of the evaporator.
Furthermore, a mounting gap exists between the center of the freezing fan and the surface, close to the freezing mask, of the evaporator, and the mounting gap is 30-60 mm.
Further, the projection area of the evaporator on the back of the refrigerator container is coincident with the back of the refrigerator container.
Further, the defrosting heater is an aluminum pipe heater, and the aluminum pipe heater is detachably mounted on the evaporator.
Furthermore, the air return duct outlet and the freezing fan are both provided with pressure sensors, the pressure sensors are connected with a refrigerator controller, and the refrigerator controller can control the corresponding defrosting heater to work according to the pressure difference between the air return duct outlet and the freezing fan.
Furthermore, each defrosting area of the evaporator is provided with a temperature sensor, and the temperature sensors are connected with the refrigerator controller.
Further, the evaporator chamber is provided with four return air duct outlets, a first defrosting area, a second defrosting area, a third defrosting area and a fourth defrosting area which correspond to the return air duct outlets are formed on the evaporator, the third defrosting area is located below the first defrosting area, the fourth defrosting area is located below the second defrosting area, and the first defrosting area and the second defrosting area are horizontally arranged side by side.
According to a second aspect of the embodiments of the present invention, there is provided a refrigerator, including the defrosting structure.
The utility model provides a change white structure, its evaporator room is provided with two at least return air duct exports that are linked together with cold-stored return air duct, is located to be formed with on the indoor evaporimeter of evaporimeter and exports the corresponding regional white of changing with the return air duct. The frosting can lead to the circulation wind path not to be expert, can change the maximum frost amount of single through changing the return air mode, ensures the smooth and easy of wind path maximum time, in addition, every area of defrosting disposes solitary defrosting heater, is responsible for the function of defrosting in each area respectively, and the effect of defrosting can be more even. Specifically, the utility model discloses a detect the regional degree of defrosting that respectively changes frost of pressure differential between each return air duct export and the freezing fan, when certain frost region frosts seriously, correspond to the pressure differential increase between the freezing fan of air return inlet, then can shut down and change the frost, only open should change the regional frost heater that corresponds of frost and carry out the regional defrosting of this region can, thereby can reduce the single volume of defrosting reducible temperature fluctuation, other subregion defrosting are in the same reason. If the frost formation amount of each defrosting area is uniform and large, namely the pressure difference of each defrosting area is large, sequential defrosting can be carried out to reduce the temperature fluctuation when defrosting inside the refrigerator.
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 these drawings without creative efforts.
Fig. 1 is a schematic structural diagram (four defrosting areas) of an evaporator provided by an embodiment of the present invention;
fig. 2 is another schematic structural diagram (three defrosting areas) of the evaporator provided by the embodiment of the invention;
fig. 3 is a schematic position diagram of an evaporator and a freezing fan according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a defrosting control method for a refrigerator according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a low-power-consumption refrigeration defrosting mode provided by an embodiment of the present invention;
fig. 6 is a schematic flow chart of the efficient refrigeration defrosting mode provided by the embodiment of the present invention.
In the figure: 1. a first aluminum tube heater; 2. a second aluminum pipe heater; 3. a third aluminum tube heater; 4. a fourth aluminum tube heater; 5. a first return air inlet; 6. a second air return inlet; 7. a third air return inlet; 8. a fourth air return inlet; 9. an evaporator; 10. a freezing fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a defrosting structure, which comprises an evaporator chamber, wherein the evaporator chamber is provided with at least two return air duct outlets communicated with a cold storage return air duct, a defrosting area corresponding to the return air duct outlet is formed on an evaporator 9 located in the evaporator chamber, and each defrosting area is provided with an independent defrosting heater. All frost layers are got rid of in the 9 heats of single evaporimeter once, and heat time is long, and the heat that overflows is more, can cause the freezer room temperature great, also changes the frost 3K problem promptly, falls into a plurality ofly and changes the regional backs of frost, and the different defrosting heaters are responsible for different regional allocations, can the single heating time quantum to can reduce single heat and spill over, temperature influence is less in the refrigerator.
The evaporator chamber in this embodiment is a space formed between the back of the freezer chest and the freezing mask for placing the evaporator 9, and the outlet of the return air duct is provided at the back of the freezer chest. The freezing fan 10 is mounted on the freezing mask.
Because the evaporator 9 of the air-cooled refrigerator is arranged in the inner container of the freezer, the arrangement space of the evaporator is an evaporator chamber, the evaporator 9 in the existing air-cooled refrigerator only occupies half or even less space of the evaporator chamber, and the utilization efficiency of the effective volume of the refrigerator is reduced. The utility model discloses a change the arrangement mode of evaporimeter 9 and increase effective space utilization, for example change the evaporimeter 9 of the three rows calandria commonly used in the existing market into two rows or one row. It should be noted that the area of each row is parallel to the back of the freezer compartment liner, i.e. perpendicular to the ground, and it is preferable that the area of the evaporator 9 projected onto the back of the freezer compartment liner coincides with the back of the freezer compartment liner, i.e. the pipeline in the evaporator 9 is laid to cover the whole back of the freezer compartment liner as much as possible, and the space saved is the part of the freezer face mask that moves backwards (hereinafter referred to as the direction close to the back of the freezer compartment liner). The tiled area of each row is increased to ensure the refrigerating capacity, and the space utilization rate of 9 evaporator bins can be effectively increased.
Usually, the front-back distance between the freezing fan 10 and the evaporator 9 is almost zero, and in order to avoid the performance influence caused by fan frosting due to the fact that the freezing fan 10 is too close to the evaporator 9, a mounting gap is arranged between the center of the freezing fan 10 and the surface, close to the freezing mask, of the evaporator 9, and the mounting gap is 30-60 mm. Preferably, a 50mm gap is reserved between the center of the freezing fan 10 and the surface of the evaporator 9 close to the freezing mask, the position of the freezing mask is not required to be changed, an installation cavity for installing the freezing fan 10 is arranged on the freezing mask, the installation cavity is protruded towards the direction close to the front side of the refrigerator, the freezing fan 10 is installed inside the installation cavity, a preset gap can be achieved between the center of the freezing fan 10 and the surface of the evaporator 9 close to the freezing mask, in addition, the air suction opening of the freezing fan 10 is opposite to the middle position of the evaporator 9, the space utilization rate is ensured, and the operation stability of the freezing fan 10 is also ensured. The matching schematic diagram of the freezing fan 10 and the evaporator 9 is shown in fig. 3.
Further, the defrosting heater in the embodiment adopts an aluminum pipe heater, and the aluminum pipe heater can be detachably mounted on a fin or a pipeline of the evaporator 9 in a buckling mode without occupying extra space.
The utility model discloses a detect the pressure of each return air duct export and freezing fan 10 department, calculate the pressure differential between return air duct export and the freezing fan 10 to the degree of frosting in every defrosting region is measured to the change of pressure differential, and when the degree of frosting is great, the return air duct exports the pressure meeting grow of difference between freezing fan 10, consequently, exports and all is provided with pressure sensor in each return air duct and freezing fan 10 department. In addition, each defrosting area of the evaporator 9 is provided with a temperature sensor, and the temperature sensor and the pressure sensor are connected with a refrigerator equipment controller. Whether the defrosting operation is to be ended or not is judged by detecting the temperature of the evaporator 9 corresponding to the defrosting area through a temperature sensor.
The evaporator chamber is provided with four air return channel outlets, a first defrosting area, a second defrosting area, a third defrosting area and a fourth defrosting area which correspond to the air return channel outlets are formed on the evaporator 9, the third defrosting area is located below the first defrosting area, the fourth defrosting area is located below the second defrosting area, and the first defrosting area and the second defrosting area are horizontally arranged side by side. The evaporator 9 is divided into four parts and is provided with an independent aluminum pipe heater, and the defrosting degree between four defrosting areas is detected by detecting the pressure difference between the outlets of the air return channels and the refrigerating fan 10. When the first defrosting area is frosted seriously, the pressure difference between the outlet 5 of the first air return channel corresponding to the first defrosting area and the freezing fan 10 is increased, the machine is stopped to defrost, only the aluminum pipe heater of the first defrosting area is opened to defrost the first defrosting area, the single defrosting amount is reduced, and the temperature fluctuation can be reduced. Other regional defrosting is the same. If the frosting amount of the four defrosting areas is uniform and is large, namely the pressure difference of the four areas is large, the defrosting can be carried out in sequence, and the temperature fluctuation can be effectively reduced when the defrosting is carried out once.
The utility model also provides a refrigerator, including foretell change white structure for guarantee to change the white effect, it is great to avoid the refrigerator inside temperature fluctuation, has improved reliability and refrigeration effect.
Based on a general utility model concept, the embodiment of the utility model provides a still provide a defrosting control method of refrigerator.
Referring to fig. 4, the present invention provides a defrosting control method applied to a refrigerator, which is implemented by the defrosting structure described in any of the above embodiments, the defrosting control method comprising the steps of:
s1, judging whether a defrosting area of an evaporator 9 meets a defrosting condition;
and S2, if yes, controlling the refrigeration equipment to start a defrosting mode so as to realize the partition defrosting operation on the evaporator 9.
Before the above-mentioned judgement whether the defrosting area of the evaporator 9 satisfies the defrosting condition, it further includes:
s0, selecting a defrosting mode by a user according to the requirement;
the defrosting mode can be divided into two modes according to the customer requirements, wherein one mode is a high-efficiency refrigeration mode which keeps the refrigeration efficiency of the high-efficiency evaporator 9 but defrosting is frequent, and the other mode is an energy-saving mode which keeps the defrosting interval longer and defrosting energy consumption lower. The user may select on his or her own needs.
When the defrosting mode is the low-power-consumption refrigeration mode, specifically, the defrosting control method of the refrigerator comprises the following steps:
judging whether all defrosting areas on the evaporator 9 meet defrosting conditions;
and if so, sequentially carrying out defrosting operation on the defrosting areas according to a preset defrosting sequence.
When at least one group of defrosting portions is formed on the evaporator 9 in this embodiment, and each group of defrosting portions includes more than one defrosting area, it is first determined whether the defrosting areas of the defrosting portions of each group on the evaporator 9 all satisfy defrosting conditions; and if so, sequentially carrying out defrosting operation on the defrosting areas in each group of defrosting parts.
Wherein, each group of portion of defrosting includes the area of changing the frost and changes the frost area down, and the step of the operation of changing the frost in each group of portion of defrosting area includes again: firstly, defrosting an upper defrosting area which is positioned above a lower defrosting area in the group of defrosting parts; and after the defrosting operation of the upper defrosting area is finished, carrying out defrosting operation on the lower defrosting area in the group of defrosting parts.
As an embodiment of the present invention, two sets of defrosting portions are formed on the evaporator 9, each set of defrosting portion includes an upper defrosting area and a lower defrosting area, that is, the evaporator 9 in this implementation is divided into four defrosting areas, for convenience of describing the defrosting process thereof, the upper defrosting area and the lower defrosting area in one set of defrosting portions are named as a first defrosting area (partition one) and a third defrosting area (partition three), the upper defrosting area and the lower defrosting area in the other set of defrosting portions are named as a second defrosting area (partition two) and a fourth defrosting area (partition four), the first defrosting area is located above the third defrosting area, and the second defrosting area is located above the fourth defrosting area.
Wherein, the pressure value of the first air return channel outlet 5 corresponding to the first defrosting area is P 1 Second defrosting zoneThe pressure value of the second return air duct outlet 6 corresponding to the domain is P 2 The pressure value of the outlet 7 of the third air return duct corresponding to the third defrosting area is P 3 The pressure value of the outlet 8 of the fourth air return duct corresponding to the fourth defrosting area is P 4 The pressure value at the position of the refrigerating fan 10 is P Fan blower And the pressure difference between the outlet 5 of the first air return duct corresponding to the first defrosting area and the refrigerating fan 10 is recorded as delta P 1 And the pressure difference between the outlet 6 of the second air return duct corresponding to the second frost removal area and the refrigerating fan 10 is recorded as delta P 2 And the pressure difference between the outlet 7 of the third air return duct corresponding to the third defrosting area and the refrigerating fan 10 is recorded as delta P 3 And the pressure difference between the outlet 8 of the fourth air return duct corresponding to the fourth defrosting area and the refrigerating fan 10 is recorded as delta P 4 The preset differential pressure value is recorded as P 0 。
When the user selects the low-power-consumption refrigeration and defrosting mode, a specific control method, as shown in fig. 5, includes the following steps:
(1) Judging whether the four defrosting areas all meet the defrosting condition according to the relation between the pressure difference between the air return duct outlets corresponding to the four defrosting areas and the refrigerating fan 10 and the preset pressure difference value, namely judging delta P 1 、ΔP 2 、ΔP 3 、ΔP 4 And P 0 The relationship of (a); when Δ P 1 ＞P 0 And Δ P 2 ＞P 0 And Δ P 3 ＞P 0 And Δ P 4 ＞P 0 When the condition meets the condition of starting the low-power-consumption refrigeration defrosting mode;
(2) Starting the first aluminum pipe heater 1, and after the first aluminum pipe heater 1 finishes working, carrying out forced cooling operation on the evaporator 9;
it should be noted that, a first heating temperature value in the first defrosting area can be obtained through the temperature sensor in the defrosting area, and if the first heating temperature value reaches a first preset temperature value, the first aluminum pipe heater 1 is turned off, that is, the first aluminum pipe heater 1 finishes working;
the freezing chamber is also provided with a temperature sensor which can obtain the temperature value of the freezing chamber, and the forced cooling operation is finished if the temperature value of the freezing chamber reaches a second preset temperature value;
(3) After the forced cooling operation of the first defrosting area is finished, the third aluminum pipe heater 3 of the third defrosting area is turned on, and after the defrosting heater on the third defrosting area works, the evaporator 9 carries out forced cooling operation;
it should be noted that, a third heating temperature value in a third defrosting area can be obtained through the temperature sensor in the defrosting area, and if the third heating temperature value reaches the first preset temperature value, the defrosting heater in the third defrosting area is turned off, that is, the defrosting heater in the third defrosting area is finished;
acquiring a temperature value of the freezing chamber through a temperature sensor of the freezing chamber, and finishing the forced cooling operation when the temperature value of the freezing chamber reaches a second preset temperature value;
(4) After the forced cooling operation of the third defrosting area is finished, the second aluminum pipe heater 2 of the second defrosting area is turned on, and after the defrosting heater on the second defrosting area works, the evaporator 9 performs the forced cooling operation;
it should be noted that, a second heating temperature value in the second defrosting area can be obtained through the temperature sensor in the defrosting area, and if the second heating temperature value reaches a first preset temperature value, the defrosting heater in the second defrosting area is turned off, that is, the defrosting heater in the second defrosting area is finished working;
acquiring a temperature value of the freezing chamber through a temperature sensor of the freezing chamber, and ending the forced cooling operation when the temperature value of the freezing chamber reaches a second preset temperature value;
(5) After the forced cooling operation of the second defrosting area is finished, a fourth aluminum pipe heater 4 of a fourth defrosting area is turned on, and after the defrosting heater on the fourth defrosting area works, the evaporator 9 carries out forced cooling operation;
it should be noted that, a fourth heating temperature value in a fourth defrosting area can be obtained through the temperature sensor in the defrosting area, and if the fourth heating temperature value reaches the first preset temperature value, the defrosting heater in the fourth defrosting area is turned off, that is, the defrosting heater in the fourth defrosting area is turned off;
and acquiring a temperature value of the freezing chamber through a temperature sensor of the freezing chamber, and finishing the forced cooling operation if the temperature value of the freezing chamber reaches a second preset temperature value.
As an embodiment in the utility model, be formed with a white portion on the evaporimeter 9, every group changes white portion and includes that two go up to change the frost region and one down changes the frost region, as shown in fig. 2, two go up to change the regional below that is located down to change the frost region of frost, be exactly that evaporimeter 9 in this implementation is divided into three regional of changing the frost, the corresponding three return air duct export that sets up. For convenience of describing the defrosting process, two upper defrosting areas are named as an upper left defrosting area and an upper right defrosting area, and the upper left defrosting area and the upper right defrosting area are positioned above the lower defrosting area. When a user selects a low-power-consumption refrigeration defrosting mode, the specific control method comprises the following steps:
(1) Judging whether the three defrosting areas all meet defrosting conditions according to the relation between the pressure difference between the air return duct outlets corresponding to the three defrosting areas and the refrigerating fan 10 and a preset pressure difference value, and if the pressure difference between the air return duct outlets corresponding to the three defrosting areas and the refrigerating fan 10 is larger than the preset pressure difference value, indicating that the condition for starting a low-power-consumption refrigeration defrosting mode is met;
(2) Turning on a defrosting heater on the upper left (or upper right) defrosting area, and after the defrosting heater on the upper left (or upper right) defrosting area finishes working, carrying out forced cooling operation on the evaporator 9;
(3) When the forced cooling operation of the upper left (or upper right) defrosting area is finished, the other upper right (or upper left) defrosting heater is turned on, and after the defrosting heater on the upper right (or upper left) defrosting area is finished, the evaporator 9 performs the forced cooling operation;
(4) After the forced cooling operation of the upper right (or upper left) defrosting area is finished, the defrosting heater of the lower defrosting area is turned on, and after the defrosting heater on the lower defrosting area is finished, the evaporator 9 performs the forced cooling operation.
The low-power-consumption refrigeration defrosting mode keeps the energy-saving mode with longer defrosting interval and lower defrosting energy consumption, and the user can select the low-power-consumption refrigeration defrosting mode with less input article load.
When the defrosting mode is the efficient refrigeration defrosting mode, the defrosting control method of the refrigerator specifically comprises the following steps:
judging whether the first defrosting area meets defrosting conditions or not according to a preset judging sequence;
if yes, carrying out defrosting operation on the corresponding defrosting area, and judging whether the next defrosting area meets defrosting conditions or not after the defrosting operation is finished;
if not, judging whether the next defrosting area meets the defrosting condition.
When at least one group of defrosting parts are formed on the evaporator 9, each group of defrosting areas comprises an upper defrosting area and a lower defrosting area, the defrosting control method of the refrigerator comprises the following steps:
judging whether an upper defrosting area in a group of defrosting parts meets defrosting conditions or not;
if yes, defrosting an upper defrosting area in the group of defrosting parts; after the defrosting operation is finished, continuing to perform the defrosting operation on a lower defrosting area in the group of defrosting parts;
after the defrosting operation of the lower defrosting area in the group of defrosting parts is finished, or when the upper defrosting area in the group of defrosting parts does not meet the defrosting condition, judging whether the upper defrosting area in the next group of defrosting parts meets the defrosting condition;
when the upper defrosting areas in each group of defrosting parts do not meet the defrosting condition, judging whether the lower defrosting areas meet the defrosting condition one by one.
As an embodiment of the present invention, two sets of defrosting portions are formed on the evaporator 9, each set of defrosting portion includes an upper defrosting area and a lower defrosting area, that is, the evaporator 9 in this implementation is divided into four defrosting areas, for convenience of describing the defrosting process thereof, the upper defrosting area and the lower defrosting area in one set of defrosting portions are named as a first defrosting area (partition one) and a third defrosting area (partition three), the upper defrosting area and the lower defrosting area in the other set of defrosting portions are named as a second defrosting area (partition two) and a fourth defrosting area (partition four), the first defrosting area is located above the third defrosting area, and the second defrosting area is located above the fourth defrosting area.
Wherein, the pressure value of the first air return channel outlet 5 corresponding to the first defrosting area is P 1 The pressure value of a second air return channel outlet 6 corresponding to the second frost removing area is P 2 The pressure value of the outlet 7 of the third air return duct corresponding to the third defrosting area is P 3 The pressure value of the outlet 8 of the fourth air return duct corresponding to the fourth defrosting area is P 4 The pressure value at the position of the refrigerating fan 10 is P Fan blower And the pressure difference between the outlet 5 of the first air return duct corresponding to the first defrosting area and the refrigerating fan 10 is recorded as delta P 1 And the pressure difference between the outlet 6 of the second air return duct corresponding to the second frost removal area and the refrigerating fan 10 is recorded as delta P 2 The pressure difference between the outlet 7 of the third air return duct and the refrigerating fan 10 corresponding to the third defrosting area is recorded as delta P 3 And the pressure difference between the outlet 8 of the fourth air return duct corresponding to the fourth defrosting area and the refrigerating fan 10 is recorded as delta P 4 The preset differential pressure value is recorded as P 0 。
When the user selects the efficient refrigeration defrosting mode, a specific control method, as shown in fig. 6, includes the following steps:
(1) Judging the relation between the pressure difference between the first return air duct outlet 5 corresponding to the first defrosting area and the refrigerating fan 10 and a preset pressure difference value to judge whether the first defrosting area meets defrosting conditions, namely, judging delta P 1 And P 0 The relationship of (1); when Δ P 1 ＞P 0 When the first defrosting area meets the condition of starting the efficient refrigeration defrosting mode, the first defrosting area meets the condition of starting the efficient refrigeration defrosting mode;
(2) Starting the first aluminum pipe heater 1, and after the first aluminum pipe heater 1 works, carrying out forced cooling operation on the evaporator 9;
it should be noted that a first heating temperature value on the first defrosting area can be obtained through the temperature sensor on the defrosting area, and if the first heating temperature value reaches a first preset temperature value, the first aluminum pipe heater 1 is turned off, that is, the first aluminum pipe heater 1 is finished working;
the freezing chamber is also provided with a temperature sensor which can obtain the temperature value of the freezing chamber, and the forced cooling operation is finished if the temperature value of the freezing chamber reaches a second preset temperature value;
(3) After the forced cooling operation of the first defrosting area is finished, the third aluminum pipe heater 3 of the third defrosting area is turned on, and after the defrosting heater on the third defrosting area works, the evaporator 9 carries out forced cooling operation;
it should be noted that, a third heating temperature value in the third defrosting area can be obtained through the temperature sensor in the defrosting area, and if the third heating temperature value reaches the first preset temperature value, the defrosting heater in the third defrosting area is turned off, that is, the defrosting heater in the third defrosting area is turned off;
acquiring a temperature value of the freezing chamber through a temperature sensor of the freezing chamber, and ending the forced cooling operation when the temperature value of the freezing chamber reaches a second preset temperature value;
(4) Judging the relationship between the pressure difference between the outlet 6 of the second air return duct and the refrigerating fan 10 corresponding to the second defrosting area and the preset pressure difference value to judge whether the second defrosting area meets the defrosting condition, namely, judging delta P 2 And P 0 The relationship of (1); when Δ P 2 ＞P 0 When the second defrosting area meets the condition of starting the efficient refrigeration defrosting mode, the second defrosting area meets the condition of starting the efficient refrigeration defrosting mode;
opening a second aluminum pipe heater 2 of a second defrosting area, and after the defrosting heater on the second defrosting area works, performing forced cooling operation on an evaporator 9;
it should be noted that, a second heating temperature value in the second defrosting area can be obtained through the temperature sensor in the defrosting area, and if the second heating temperature value reaches a first preset temperature value, the defrosting heater in the second defrosting area is turned off, that is, the defrosting heater in the second defrosting area is finished;
acquiring a temperature value of the freezing chamber through a temperature sensor of the freezing chamber, and ending the forced cooling operation when the temperature value of the freezing chamber reaches a second preset temperature value;
(5) When the forced cooling operation of the second defrosting area is finished, the fourth aluminum pipe heater 4 of the fourth defrosting area is turned on, and after the defrosting heater on the fourth defrosting area works, the evaporator 9 carries out forced cooling operation;
it should be noted that, a fourth heating temperature value in a fourth defrosting area can be obtained through the temperature sensor in the defrosting area, and if the fourth heating temperature value reaches the first preset temperature value, the defrosting heater in the fourth defrosting area is turned off, that is, the defrosting heater in the fourth defrosting area is turned off;
and acquiring a temperature value of the freezing chamber through a temperature sensor of the freezing chamber, and finishing the forced cooling operation if the temperature value of the freezing chamber reaches a second preset temperature value.
(6) When the defrosting area of the first defrosting area does not meet the defrosting condition, judging whether the second defrosting area meets the defrosting condition or not, if so, performing defrosting operation on the second defrosting area, and if not, judging whether the third defrosting area meets the defrosting condition or not; if the third defrosting area meets the defrosting condition, defrosting the third defrosting area, and if the third defrosting area does not meet the defrosting condition, judging whether the fourth defrosting area meets the defrosting condition; and if the fourth defrosting area meets the defrosting condition, carrying out defrosting operation on the fourth defrosting area.
As an embodiment in the utility model, be formed with a set of portion of defrosting on the evaporimeter 9, the portion of defrosting includes that it is regional and one down the regional area of defrosting to change the frost on two, changes the regional below that is located down the regional area of defrosting on two, and it is regional that evaporimeter 9 in this implementation is divided into three defrosting, for the convenience of describing its process of changing the frost, changes the regional name of defrosting on two and changes the frost regional and the upper right area of defrosting on the left side, changes the regional top that changes the frost under the regional position of defrosting on the upper left side and the upper right area of defrosting on the right side. When a user selects an efficient refrigeration defrosting mode, firstly, judging whether a defrosting condition is met in an upper left defrosting area, and if the defrosting condition is met, performing defrosting operation on the upper left defrosting area; if the right upper defrosting area does not meet the defrosting condition, continuously judging whether the right upper defrosting area meets the defrosting condition, and if the right upper defrosting area meets the defrosting condition, performing defrosting operation on the right upper defrosting area; and if the upper right defrosting area does not meet the defrosting condition, judging the lower defrosting area, and if the lower defrosting area meets the defrosting condition, performing defrosting operation on the lower defrosting area.
The air return mode is changed to be matched with the evaporator 9 structure, and the temperature fluctuation during defrosting inside the refrigerator is reduced by changing the defrosting heat mode and matching with the corresponding defrosting rule.
Preferably, the utility model provides a return air mode changes four return air channel exports into, divide into four regions with evaporimeter 9, and every region is equipped with independent aluminum pipe heater, is responsible for the defrosting function in each region respectively. Dividing the evaporator 9 into four zones for defrosting is effective to reduce the peak of temperature fluctuation in the defrosting stage, but this results in shorter intervals for each defrosting, and to reduce this state, the defrosting is divided into two modes, one mode being that each time each zone satisfies the defrosting condition Δ P i ＞P 0 Defrosting is carried out, and then the device is cooled by strong force and then normally operates. The water drops fall after defrosting, so that the frosting states of the third defrosting area and the fourth defrosting area are affected after the first defrosting area and the second defrosting area are defrosted, the third defrosting area needs to be defrosted after the first defrosting area is defrosted, and the fourth defrosting area needs to be defrosted after the second defrosting area is defrosted. The third defrosting area and the fourth defrosting area can be independently defrosted, namely the efficient refrigeration defrosting mode is described above. The other mode is that defrosting is carried out again after the four subareas meet the defrosting condition, namely the low-power-consumption refrigeration defrosting mode. The high-efficiency refrigeration mode can always keep a low frost formation state so as to keep high-efficiency refrigeration, but the defrosting interval is shorter, and the energy consumption is higher. The low-power-consumption refrigeration defrosting mode is opposite, the later-stage refrigeration efficiency is lower, but the defrosting interval can be prolonged, and the energy consumption is lower compared with the mode. The user may select on his or her own basis.
The above embodiments are only 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 think of changes or substitutions within the technical scope of the present invention, and all 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 claims.
Claims (10)
1. The defrosting structure is characterized by comprising an evaporator chamber, wherein the evaporator chamber is provided with at least two air return channel outlets communicated with a refrigerating air return channel, defrosting areas corresponding to the air return channel outlets are formed on an evaporator in the evaporator chamber, and each defrosting area is provided with an independent defrosting heater.
2. The structure of claim 1, wherein the evaporator chamber is a space formed between a back of the freezer chest and the freezing mask for placing an evaporator, and the return air duct outlet is provided at the back of the freezer chest.
3. The structure of defrosting according to claim 2, wherein the freezing face mask is provided with a freezing fan, and the projection of the suction opening of the freezing fan on the evaporator is located at the center of the evaporator.
4. The structure of claim 3, wherein a mounting gap exists between the center of the freezing fan and the surface of the evaporator near the freezing face mask, and the mounting gap is 30-60 mm.
5. The structure of claim 2, wherein a projected area of the evaporator on the back of the freezer compartment liner coincides with the back of the freezer compartment liner.
6. The defrosting structure of claim 1 wherein the defrosting heater is an aluminum tube heater removably mounted on the evaporator.
7. The defrosting structure of claim 3 wherein the return duct outlet and the freezing fan are each provided with a pressure sensor, the pressure sensors are connected to a refrigerator controller, and the refrigerator controller can control the operation of the corresponding defrosting heater according to the pressure difference between the return duct outlet and the freezing fan.
8. The defrosting structure of claim 1 wherein each defrosting area of the evaporator is provided with a temperature sensor, and the temperature sensor is connected with a refrigerator controller.
9. The structure of defrosting according to claim 1, wherein the evaporator chamber is provided with four air return channel outlets, the evaporator is formed with a first defrosting area, a second defrosting area, a third defrosting area and a fourth defrosting area corresponding to the air return channel outlets, the third defrosting area is located below the first defrosting area, the fourth defrosting area is located below the second defrosting area, and the first defrosting area and the second defrosting area are horizontally arranged side by side.
10. A refrigerator characterized by comprising the defrosting structure of any one of claims 1 to 9.
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| CN202222270102.8U CN218296388U (en) | 2022-08-26 | 2022-08-26 | Defrosting structure and refrigerator thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115265073A (en) * | 2022-08-26 | 2022-11-01 | 珠海格力电器股份有限公司 | Defrosting structure, refrigerator and defrosting control method of refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115265073A (en) * | 2022-08-26 | 2022-11-01 | 珠海格力电器股份有限公司 | Defrosting structure, refrigerator and defrosting control method of refrigerator |
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