CN113124603B - Refrigerator air curtain control method - Google Patents
Refrigerator air curtain control method Download PDFInfo
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- CN113124603B CN113124603B CN201911420026.0A CN201911420026A CN113124603B CN 113124603 B CN113124603 B CN 113124603B CN 201911420026 A CN201911420026 A CN 201911420026A CN 113124603 B CN113124603 B CN 113124603B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000001704 evaporation Methods 0.000 claims abstract description 49
- 230000008020 evaporation Effects 0.000 claims abstract description 44
- 238000007664 blowing Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
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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
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/045—Air flow control arrangements
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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
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
-
- 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
- F25D29/005—Mounting of control devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses a refrigerator air curtain control method, which comprises a refrigerator body and a door body, wherein the refrigerator air curtain control method comprises the following steps: detecting whether the door body is opened or not; when the door body is detected to be opened, the first air supply device and the first air return device are closed; detecting the actual temperature in the cabinet body in real time, calculating the temperature difference between the actual temperature and the set temperature, and timing the door opening time; when the temperature difference is greater than a preset temperature threshold value or the door opening time is greater than a first preset door opening time, controlling the evaporation fan and the compressor to operate, and opening the first air supply device and the first air return device to enable the first air supply device and the first air return device to form an air curtain at the cabinet opening; if the door opening time is longer than the second preset door opening time, the evaporation fan and the compressor operate according to the state when the door body is closed, wherein the second preset door opening time is longer than the first preset door opening time. The invention solves the problem of large temperature fluctuation in the refrigerator body when the refrigerator door is opened.
Description
Technical Field
The invention relates to the technical field of horizontal air-cooled refrigerators, in particular to a refrigerator air curtain control method.
Background
At present, refrigeration equipment (such as refrigerators and freezers) is an electrical appliance commonly used in daily life of people, and the freezers are divided into horizontal freezers and vertical freezers, and the horizontal freezers are widely used due to large storage capacity. Conventional horizontal freezers generally use direct cooling to cool, but in the use process, frost is easily formed in the box body, and in order to reduce the frost formed in the box body, the horizontal freezer adopting air cooling is gradually popularized.
The horizontal air-cooled refrigerator realizes horizontal air-cooled refrigeration by arranging an air supply device and an air return device, wherein the air supply device blows out air with lower temperature into the storage compartment so as to refrigerate articles stored in the storage compartment, then the air with higher temperature is sucked away by the air return device, and the air with lower temperature is usually provided by a refrigerating system in refrigerating equipment.
In the in-service use process, the evaporation fan stops rotating when the door body is opened, and at the moment, the heat exchange quantity between the external environment and the inner part of the cabinet body is larger, so that the temperature fluctuation in the cabinet body is larger and the cold quantity loss is increased. Especially for the refrigerator for storing special products such as medicines, the stability of the temperature in the refrigerator body is important.
Disclosure of Invention
The invention provides a refrigerator air curtain control method aiming at the problem that the temperature fluctuation in the cabinet body is large when the cabinet door of the existing horizontal type air refrigerator is opened, which is used for improving the object taking test of a user when the door body is opened, reducing the heat of the external environment entering the cabinet body and improving the refrigerating effect of the refrigerator.
In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme:
the refrigerator comprises a refrigerator body and a door body, and is characterized in that a first air supply device is arranged at the position, close to a refrigerator opening, of a first end part of the refrigerator body, and a first air return device is arranged at the position, close to the refrigerator opening, of a second end part, opposite to the first end part, of the refrigerator body, and the refrigerator air curtain control method comprises the following steps: s1: detecting whether the door body is opened or not; s2: when the door body is detected to be opened, the first air supply device and the first air return device are closed; s3: detecting the actual temperature in the cabinet body in real time, and calculating the temperature difference between the actual temperature and the set temperature; and timing the door opening time; s4: when the temperature difference is larger than a preset temperature threshold value or the door opening time is larger than a first preset door opening time, controlling the evaporation fan and the compressor to operate, and opening the first air supply device and the first air return device to enable the first air supply device and the first air return device to form an air curtain at the cabinet opening; s5: and if the door opening time is longer than a second preset door opening time, the evaporation fan and the compressor operate according to the state when the door body is closed, wherein the second preset door opening time is longer than the first preset door opening time.
The method for controlling the air curtain of the refrigerator comprises the following steps of: the compressor and the evaporating fan stop running, so that the first air supply device does not supply air and the first air return device does not return air.
According to the refrigerator air curtain control method, the first end part is provided with the second air supply device below the first air supply device, and the second end part is provided with at least one second air return device below the first air return device; in S2, the first air supply device and the first air return device are closed, the second air supply device and at least one second air return device are opened, the compressor is operated in a frequency-reducing mode, and the evaporation fan is operated in a low duty ratio.
According to the refrigerator air curtain control method, the first end part is provided with the second air supply device below the first air supply device, and the second end part is provided with at least one second air return device below the first air return device; and when the door opening time is longer than the first preset door opening time in the step S4, controlling the operation of the compressor and the evaporation fan, and simultaneously controlling to open the second air supply device and at least one second air return device.
The refrigerator air curtain control method comprises the following steps: and S4, when the door opening time is longer than the first preset door opening time, alarming and prompting are carried out.
According to the refrigerator air curtain control method, the first end part is provided with the second air supply device below the first air supply device, and the second end part is provided with at least one second air return device below the first air return device; when the door opening time is longer than the second preset door opening time in S5, judging the temperature difference and the preset temperature threshold in real time; when the temperature difference is smaller than or equal to the preset temperature threshold value, the first air supply device and the first air return device are kept open, and the second air supply device and at least one second air return device are closed; and when the temperature difference is larger than the preset temperature threshold value, opening the first air supply device, the first air return device, the second air supply device and at least one second air return device.
In the refrigerator air curtain control method, a side air supply device is further arranged on the opposite side of the first end portion, and the side air supply device is opened when the door body is detected to be opened in the step S2.
According to the refrigerator air curtain control method, the distance between the first air supply device and the refrigerator opening is not more than 100mm.
According to the refrigerator air curtain control method, the number of the first air supply devices is two, and the first air supply devices are arranged in the same row at intervals.
The invention also relates to a refrigerator air curtain control method, which comprises a refrigerator body and a door body, and is characterized in that a first air supply device and a second air supply device are arranged at the first end part of the refrigerator body up and down, and a first air return device and at least one second air return device are arranged at the second end part of the refrigerator body opposite to the first end part up and down, and the refrigerator air curtain control method comprises the following steps: s1: detecting whether the door body is opened or not; s2: when the door body is detected to be opened, the first air supply device and the first air return device are closed; s3: detecting the actual temperature in the cabinet body in real time, and calculating the temperature difference between the actual temperature and the set temperature; and timing the door opening time; s4: when the temperature difference is larger than a preset temperature threshold value or the door opening time is larger than a first preset door opening time, controlling the evaporation fan and the compressor to operate, and opening the first air supply device and the first air return device to enable the first air supply device and the first air return device to form an air curtain at the cabinet opening; s5: if the door opening time is longer than the second preset door opening time, judging the temperature difference and the preset temperature threshold in real time; when the temperature difference is smaller than or equal to the preset temperature threshold value, the first air supply device and the first air return device are kept open, the second air supply device and at least one second air return device are closed, and the evaporation fan is enabled to operate while the compressor is not enabled to operate; when the temperature difference is larger than the preset temperature threshold value, the first air supply device, the first air return device, the second air supply device and at least one second air return device are opened, and the compressor and the evaporation fan are operated; wherein the second preset door opening time is greater than the first preset door opening time.
Compared with the prior art, the invention has the advantages and positive effects that: when the door body is detected to be opened, the first air supply device and the first air return device are closed, an air curtain is not formed at the cabinet opening, so that a user does not feel the stimulation of the air curtain when stretching into the cabinet body to take objects, and when the door opening time is prolonged or the temperature difference is larger than a preset temperature threshold value, the operation of the evaporation fan and the compressor is controlled, the first air supply device and the second air supply device are opened, the first air supply device and the second air supply device form a cold air curtain at the cabinet opening, the cold air curtain prevents heat in the outside air from entering the cabinet body, the loss of cold is avoided, and the refrigerating capacity of the refrigerator is ensured.
Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a horizontal air-cooled refrigerator according to the present invention;
fig. 2 is a flowchart of a first embodiment of a method for controlling an air curtain of a refrigerator according to the present invention;
fig. 3 is a flowchart of a second embodiment of a method for controlling an air curtain of a refrigerator according to the present invention;
fig. 4 is a flowchart of a third embodiment of a method for controlling an air curtain of a refrigerator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
Fig. 1 shows a schematic structural diagram of a horizontal air-cooled refrigerator. Referring to fig. 1, the structure of the horizontal air-cooled refrigerator is described first, the horizontal air-cooled refrigerator includes a cabinet body 10 and a door body 20, the door body 20 is located at the top end of the cabinet body 10, and is used for opening and closing a cabinet opening (not shown) formed in the cabinet body 10, an evaporation cavity 30 is provided on the cabinet body 10, an evaporation fan 31 and an evaporator 32 are provided in the evaporation cavity 30, a first end (shown as a right end in fig. 1) of the cabinet body 10 is provided with an air outlet duct 40 and a first air return duct 50 which are arranged up and down, a second end (shown as a left end in fig. 1) and a bottom of the cabinet body 10 opposite to the first end are respectively provided with a second air return duct 60 and a third air return duct 70, the air outlet duct 40, the second air return duct 60, the third air return duct 70 and the first air return duct 50 form a circulation duct, the air outlet duct 40 is communicated with an air outlet (not shown) of the evaporation cavity 30, and the first air return duct 50 is communicated with an air inlet (not shown) of the evaporation cavity 30.
The first end is provided with a first air supply device (not shown) near the cabinet opening, and the second end is provided with a first air return device near the cabinet opening. The air supply device according to this embodiment may include a plurality of air supply ports, and an air supply damper may be further disposed on the air supply ports, and the air supply damper may be capable of opening and closing the air supply ports. The air return device that this embodiment relates to can contain a plurality of return air inlets, can also be provided with the return air damper on this return air inlet, and this return air damper can the switching this return air inlet.
The first air supply device is an upper air supply port 41 formed in the top of the air outlet duct 40, and the first air return device is an upper air return port 61 formed in the top of the second air return duct 60.
The air outlet duct 40 arranged at the end part of the horizontal air-cooled refrigerator is matched with the second air return duct 60 and the third air return duct 70 arranged at the opposite end part and the bottom, so that the sent cold air directly impacts the opposite second air return duct 60, the cold air output from the air outlet duct 40 can cover the whole cross section in the cabinet body 10, the upper air outlet 41 and the upper air return 61 can form a top air curtain to isolate heat leaked in from a door sealing strip, and by utilizing the natural sinking principle of cold air, part of cold air output from the air outlet duct 40 is sunk through heat exchange and the other part of cold air returns back into the evaporation cavity 30 from the third air return duct 70 at the bottom after being sunk through heat exchange through the second air return duct 60, thereby realizing cold air circulation in the whole cabinet body 10 and ensuring that all areas in the cabinet body 10 are uniformly refrigerated so as to improve the refrigerating effect.
In order to avoid the wind sense of the top air curtain to the hands of the user when the door 20 is opened, reduce the user's object taking experience, and avoid the influence of heat in the external environment entering the cabinet 10 to affect the temperature in the cabinet 10 during the opening of the door 20, reduce the cooling effect and increase the energy consumption, the refrigerator air curtain control method of the present invention shown in fig. 2 to 4 is used to solve the above problems, wherein the refrigerator air curtain control method shown in fig. 2 to 4 is implemented based on the horizontal air-cooled refrigerator shown in fig. 1.
Example 1
Fig. 2 shows a flow chart of a method for controlling an air curtain of a refrigerator. Specifically, the following description is made with reference to fig. 2.
S21: it is detected whether the door body 20 is opened.
Firstly, the whole machine power-on of the horizontal air-cooled refrigerator needs to be ensured.
There are various conventional ways of detecting the opening of the door 20, for example, a push-pull door may be selected from a magnetic switch, an open/close door may be selected from a magnetic switch or a gravity switch, etc., and the present invention is not limited thereto
The above-mentioned electronic detecting device for detecting whether the door body 20 is opened is connected with the electronic thermostat in the cabinet body 10.
When it is detected that the door body 20 is closed, the whole refrigeration cycle is operated according to a preset program when the door is closed, which is different from the refrigeration cycle of a conventional refrigerator when the door is closed, mainly the start-stop control of the compressor M and the evaporation fan 31, and can refer to the refrigeration cycle of the conventional refrigerator when the door is closed, for example, in a normal refrigeration process, the evaporation fan 31 is stopped after a period of time after the operation of the compressor M is stopped, and the evaporation fan 31 is operated for a period of time in advance before the operation of the compressor M is started.
S22: when the door 20 is opened, the first air supply device and the second air supply device are closed.
In this step, after opening the door, the user will take out the article from the refrigerator, and the first air supply device and the second air supply device are closed to avoid forming a top air curtain between the upper air supply port 41 and the upper air return port 61, so as to generate a wind sensation to the hand of the user when taking out the article.
The first air supply device and the second air supply device are closed in the following first mode.
In the first mode, no matter what state the compressor M and the evaporation fan 31 are in before the door 20 is opened, when the door 20 is detected to be opened, the compressor M and the evaporation fan 31 are controlled to stop running, and at this time, the first air supply device does not supply air and the first air return device does not return air, so that the first air supply device and the first air return device do not form a top air curtain at the cabinet opening.
S23: the actual temperature Ta in the cabinet 10 is detected in real time, the temperature difference Δt between the actual temperature Ta and the set temperature Ts is calculated, and the door opening time T is counted.
In S23, the temperature sensor may be located on the inner container in the cabinet 10, and the location of the temperature sensor is preferably located on the wind direction path of the circulating air duct, so that the temperature in the cabinet 10 can be reflected relatively accurately. The temperature sensor is connected with an electronic temperature controller in the refrigerator. Under normal operation, namely when the refrigerator door body 20 is closed, the temperature sensor in the refrigerator body 10 senses the temperature in the refrigerator body 10; when the door 20 is opened, external air enters the cabinet 10 to cause a temperature change in the cabinet 10, and the temperature sensor senses the temperature change and sends the detected actual temperature Ta to the electronic temperature controller in real time.
As the time for opening the door 20 increases, the temperature and the cooling capacity in the cabinet 10 gradually run off, and thus, the temperature in the cabinet 10 increases, and whether a cool air curtain is to be formed at the cabinet opening is determined according to the change of the temperature difference Δt or the length of the door opening time T.
S24: and judging whether the door opening time t is larger than a first preset door opening time t1.
In S24, the first preset door opening time t1 is set to 30 seconds, but this time may be set to other values, and 30 seconds is shown here as an example only.
If t >30S, go to S26, otherwise, go to S22, keep the current state, and keep counting the door opening time.
S25: and judging whether the temperature difference delta T is larger than a preset temperature threshold Tth.
In S25, the preset temperature threshold Tth is set to 3 ℃, although this temperature may be set to other values, and 3 ℃ is shown here as an example only.
If DeltaT >3 ℃, go to S26, otherwise, return to value S21, and check whether door 21 is open.
S26: the evaporation fan 31 and the compressor M are controlled to operate, and the first air supply device and the second air supply device are turned on.
When DeltaT is more than 3 ℃ or T is more than 30s, the evaporation fan 31 and the compressor M are controlled to operate, at the moment, an air curtain formed by cold air is formed between the upper air supply opening 41 and the upper air return opening 61 and used for blocking external hot air from entering the cabinet 10, the refrigeration cycle is started, the cold air output by the air outlet duct 40 and hot air in the cabinet 10 are exchanged and returned to the evaporation cavity 30 through the first air return duct 50, and the cold air output by the air outlet duct 40 is also returned to the evaporation cavity 30 through the second air return duct 60, so that the cold air curtain is formed and the interior of the cabinet 10 is uniformly cooled.
S27: detecting the door opening time t in real time, and judging whether t is larger than a second preset door opening time t2.
In S27, the second preset door opening time t2 is set to 7 minutes, but this time may be set to other values, and 7 minutes is shown here as an example only.
At t >7min, the whole refrigeration cycle operates according to a preset program when the door is closed, which is different from the refrigeration cycle of a conventional refrigerator when the door is closed, mainly the start and stop control of the compressor M and the evaporation fan 31 can be referred to the refrigeration cycle of the conventional refrigerator when the door is closed. When t is less than or equal to 7 minutes, whether the door body 20 is opened or not is continuously detected, and the door opening time is counted when the door body is continuously opened.
When the door body 20 is opened, a top air curtain is not formed at the cabinet opening, so that the air blowing sense of a user during taking objects is avoided, the object taking experience of the user is improved, when the door opening time is longer than a first preset time or the temperature difference is longer than a certain value, the user is shown to forget to close the door or still open the door body 20 for a long time, so that the temperature in the cabinet body 10 is increased, a cold air curtain is formed at the cabinet opening through the operation of the refrigeration cycle and the first air supply device and the second air supply device, the heat exchange between cold air in the refrigerator and hot air in the external environment is isolated, the cold energy loss during the door opening period is avoided, the power consumption is reduced, and the refrigeration effect in the cabinet body 10 is ensured.
Example two
As shown in fig. 3, which shows a flow chart of a second embodiment of a refrigerator air curtain control method, is also implemented based on the structure of the horizontal air-cooled refrigerator shown in fig. 1.
The implementation of the present embodiment differs from the implementation in implementation one as follows.
As shown in fig. 3, the manner in which the first air blowing device and the second air blowing device are turned off may be achieved in the following second manner.
In the second mode, in order that, during the opening of the door 20, the top air curtain is not formed at the cabinet opening, it is desirable that the bottom inside the cabinet 10 still can normally cool, so in this second mode, a second air supply device is provided at the first end below the first air supply device, and the second air supply device is at least one lower air supply opening (lower air supply opening 42 is shown in fig. 1), and each air supply opening is provided with an air inlet for opening and closing each air supply opening, and at least one second air return device is provided at the second end below the first air return device, specifically in this embodiment, the at least one second air return device includes a second air return device a and a second air return device B which are arranged vertically below the first air return device, and the second air return device a is at least one middle air return opening (middle air return opening 62 is shown in fig. 1), and the second air return device B is at least one lower air return opening (lower air return opening 63 is provided for opening and closing the corresponding at least one middle air return opening and at least one non-lower air return opening (door is not shown). Each air door is equipped with a wind gap tripe and step motor, and step motor's drive shaft is connected main connecting rod, and main connecting rod rotates with the one end of wind gap tripe through first bent axle, and the other end of wind gap tripe rotates with the second bent axle that sets up on the wind gap and is connected, and the wind gap tripe is used for the wind-guiding.
When the door 20 is detected to be opened, the first air supply device and the first air return device are closed, the second air supply device and the second air return devices a and B are opened, the compressor M is operated in a down-conversion mode, and the evaporation fan 31 is operated at a low duty ratio, that is, when the door 20 is opened, the upper air supply port 41 and the upper air return port 61 are closed, the lower air supply port 42, the middle air return port 62 and the lower air return port 63 are opened, and the compressor M is operated in a down-conversion mode (for example, the frequency of the compressor M is reduced by 30%), the evaporation fan 31 is operated at a low duty ratio (for example, the duty ratio of the evaporation fan is 50% of the duty ratio of the normal fan at that temperature), at this time, the upper air supply port 41 and the upper air return port 61 are closed (even if the compressor M and the evaporation fan 31 are both operated), an air curtain is not formed at the cabinet opening, and the bottom of the cabinet 10 can still be cooled due to the air supply from the lower air supply port 42, the middle air return port 62 and the lower air return port 63, so that the inside the cabinet 10 can be cooled, and the cooling temperature can be maintained.
As shown in fig. 3, the actual temperature Ta in the cabinet 10 is detected in real time, and the temperature difference Δt between the actual temperature Ta and the set temperature Ts is calculated, and the door opening time T is counted.
When t > t1 (30 seconds, for example), the user is considered to be hesitant to take the object or forget to close the door, at this time, in order to avoid a great loss of temperature in the cabinet 10, the compressor M and the evaporation fan 31 are operated simultaneously, and the upper air supply port 41, the upper air return port 61, the lower air supply port 42, the middle air return port 62 and the lower air return port 63 are all opened, so that the refrigeration cycle in the cabinet 10 is realized while the top air curtain is formed. In addition, in the process, an alarm prompt signal can be sent out in an audible and visual alarm mode when the air curtain is formed, so that a user is reminded to close the door. When t.ltoreq.t1, whether the door body 20 is opened or not is continuously detected, and the door opening time is counted when the opening is continued.
When T > T2 (where T2> T1, for example, t2=7min), it is determined that the user forgets to close the door or perform the display mode, and the opening of each tuyere is determined according to the relationship between the temperature difference Δt in the cabinet 10 and the preset temperature threshold Tth. At t.ltoreq.t2, whether the door body 20 is opened or not is continuously detected, and the door opening time is counted when the opening is continued.
Specifically, when Δt < = Tth (e.g. 3 ℃), the upper air supply port 41 and the upper air return port 61 are kept open, and the lower air supply port 42, the middle air return port 62 and the lower air return port 63 are closed, so that most of the cool air output from the air outlet duct 40 is returned from the upper air return port 61, the upper air supply port 41 and the upper air return port 61 form a large air curtain at the cabinet opening, and external heat is prevented from entering the cabinet 10, and at this time, the operation states of the evaporation fan 31 and the compressor M are still according to the operation states when the door 20 is closed.
When DeltaT > Tth, the upper air supply opening 41, the upper air return opening 61, the lower air supply opening 42, the middle air return opening 62 and the lower air return opening 63 are kept open, the upper air supply opening 41 and the upper air return opening 61 form an air curtain at the cabinet opening, and the middle air return opening 62 and the lower air return opening 63 return air due to the air supply of the lower air supply opening 42, so that the bottom of the cabinet 10 can still be refrigerated for realizing the internal refrigeration of the cabinet 10, and the running states of the evaporating fan 31 and the compressor M still correspond to the running states when the door 20 is closed.
In addition, eight air supply openings are provided on the air outlet duct 40, four upper air supply openings 41 are arranged at the same row at intervals on the uppermost side, two lower air supply openings 42 are arranged at the same row at intervals on the lower side, and a left air supply device and a right air supply device are formed on the opposite left and right sides of the air outlet duct 40. The upper air supply opening 41 in this embodiment is more concentrated above the air outlet duct 40, and the distance from the air outlet is not more than 100mm, so as to ensure that a stronger and flatter air curtain is formed at the air outlet, better isolate the outside air from entering the cabinet 10, and ensure the temperature in the cabinet 10.
Example III
The present invention also relates to a refrigerator air curtain control method, as shown in fig. 4, which shows a flowchart of an embodiment of a refrigerator air curtain control method, similar to the refrigerator air curtain control method shown in fig. 3 in the second embodiment, except that the opening of each tuyere and the start-stop operation of the evaporating fan 31 and the compressor M are determined according to the relationship between the temperature difference Δt in the cabinet 10 and the preset temperature threshold Tth at T > T2. Of course, in the present embodiment, the condition for triggering the formation of the air curtain may be that the air curtain is formed by a temperature difference Δt > Tth, in addition to T > T1 shown in fig. 4.
Specifically, as shown in fig. 4, when T > T2 and Δt < = Tth, the evaporation fan 31 is kept operating and the upper air supply port 41 and the upper air return port 61 are kept open, so as to form the temperature in the air curtain protection cabinet 10, and the lower air supply port 42, the middle air return port 62 and the lower air return port 63 are closed, so that the air quantity is basically blown out from the upper air supply port 41 and is sent into the upper air return port 61, the formed air curtain effect is better, and the compressor M is not operated at this time for the purpose of energy saving. When T > T2 and DeltaT > Tth, the evaporation fan 31 and the compressor M are kept running, and the upper air supply port 41, the upper air return port 61, the lower air supply port 42, the middle air return port 62 and the lower air return port 63 are kept open, so that the articles in the cabinet body 1 can be refrigerated when the temperature in the cabinet body 10 is protected by the air curtain, and the better refrigerating effect is realized while the heat exchange between external heat and cold air in the cabinet body 10 is prevented.
In addition, when the door opening time T > T2 is automatically set to enter the display mode, the evaporating fan 31 is controlled to continuously operate, the upper air supply door and the lower air supply door are opened to form the air curtain to protect the temperature in the cabinet 10, and other air doors (the lower air supply door, the middle air return door and the lower air return door) and the compressor M are controlled according to the temperature difference DeltaT in the cabinet 10 as described above. Alternatively, a key control for opening the display mode may be designed on the control panel, after the display mode is determined, the door body 20 is opened, the evaporation fan 31 is controlled to continuously operate, the upper air supply door and the lower air supply door are opened, the temperature in the air curtain protection cabinet 10 is formed, and the other air supplies (the lower air supply door, the middle air return door and the lower air return door) and the compressor M are controlled according to the temperature difference Δt in the cabinet 10 as described above.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. The refrigerator comprises a refrigerator body and a door body, and is characterized in that a first air supply device is arranged at the position, close to a refrigerator opening, of a first end part of the refrigerator body, and a first air return device is arranged at the position, close to the refrigerator opening, of a second end part, opposite to the first end part, of the refrigerator body, and the refrigerator air curtain control method comprises the following steps:
s1: detecting whether the door body is opened or not;
s2: when the door body is detected to be opened, the first air supply device and the first air return device are closed, the second air supply device and at least one second air return device are opened, the compressor is operated in a frequency-reducing mode, and the evaporation fan is operated in a low duty ratio;
the first end part is provided with a first air supply device, and the first air supply device is positioned below the first air supply device;
s3: detecting the actual temperature in the cabinet body in real time, calculating the temperature difference between the actual temperature and the set temperature, and timing the door opening time;
s4: when the door opening time is longer than a first preset door opening time, controlling the operation of the evaporation fan and the operation of the compressor, and opening the first air supply device, the first air return device, the second air supply device and the second air return devices;
s5: if the door opening time is longer than the second preset door opening time, judging the temperature difference and the preset temperature threshold in real time;
when the temperature difference is smaller than or equal to the preset temperature threshold value, the first air supply device and the first air return device are kept open, the second air supply device and at least one second air return device are closed, and the evaporation fan and the compressor operate according to the state when the door body is closed;
when the temperature difference is larger than the preset temperature threshold value, the first air supply device, the first air return device, the second air supply device and at least one second air return device are opened, and the evaporation fan and the compressor operate in a state when the door body is closed;
wherein the second preset door opening time is greater than the first preset door opening time.
2. The refrigerator air curtain control method according to claim 1, wherein the closing of the first air supply device and the first air return device specifically comprises:
the compressor and the evaporating fan stop running, so that the first air supply device does not supply air and the first air return device does not return air.
3. The refrigerator air curtain control method according to claim 1, further comprising: and S4, when the door opening time is longer than the first preset door opening time, alarming and prompting are carried out.
4. A refrigerator air curtain control method as claimed in any one of claims 1 to 3, wherein side air blowing means are also provided on opposite sides of the first end, the side air blowing means being opened when the door opening is detected in S2.
5. A refrigerator air curtain control method as claimed in any one of claims 1 to 3, wherein the first air supply means is no more than 100mm from the cabinet opening.
6. A refrigerator air curtain control method as claimed in any one of claims 1 to 3, wherein the number of the first air supply devices is two and arranged in parallel at intervals.
7. The refrigerator comprises a refrigerator body and a door body, and is characterized in that a first air supply device and a second air supply device are arranged on the first end part of the refrigerator body up and down, a first air return device and at least one second air return device are arranged on the second end part of the refrigerator body opposite to the first end part up and down, and the refrigerator air curtain control method comprises the following steps:
s1: detecting whether the door body is opened or not;
s2: when the door body is detected to be opened, the first air supply device and the first air return device are closed, the second air supply device and at least one second air return device are opened, the compressor is operated in a frequency-reducing mode, and the evaporation fan is operated in a low duty ratio;
s3: detecting the actual temperature in the cabinet body in real time, calculating the temperature difference between the actual temperature and the set temperature, and timing the door opening time;
s4: when the door opening time is longer than a first preset door opening time, controlling the operation of the evaporation fan and the operation of the compressor, and opening the first air supply device, the first air return device, the second air supply device and the second air return devices;
s5: if the door opening time is longer than the second preset door opening time, judging the temperature difference and the preset temperature threshold in real time;
when the temperature difference is smaller than or equal to the preset temperature threshold value, the first air supply device and the first air return device are kept open, the second air supply device and at least one second air return device are closed, and the evaporation fan is enabled to operate while the compressor is not enabled to operate;
when the temperature difference is larger than the preset temperature threshold value, the first air supply device, the first air return device, the second air supply device and at least one second air return device are opened, and the compressor and the evaporation fan are operated;
wherein the second preset door opening time is greater than the first preset door opening time.
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| CN114877585A (en) * | 2022-05-06 | 2022-08-09 | 海信（山东）冰箱有限公司 | Refrigerator and air curtain fan control method of refrigerator |
| CN115127295B (en) * | 2022-07-05 | 2023-07-18 | 珠海格力电器股份有限公司 | Control method of refrigerator, refrigerator and computer readable storage medium |
| CN115773628B (en) * | 2022-12-08 | 2024-08-27 | 珠海格力电器股份有限公司 | Rotational speed control method and refrigeration equipment |
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| CN104344629A (en) * | 2014-01-13 | 2015-02-11 | 海尔集团公司 | Refrigerator and control method for air curtain generation devices in refrigerator |
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