CN118031507B

CN118031507B - Air supplementing device, refrigerator and air supplementing control method

Info

Publication number: CN118031507B
Application number: CN202410434625.2A
Authority: CN
Inventors: 丁瑞; 卢起彪; 牛二帅; 陆文怡
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2024-04-11
Filing date: 2024-04-11
Publication date: 2024-07-05
Anticipated expiration: 2044-04-11
Also published as: CN118031507A

Abstract

The application relates to the technical field of refrigerators, in particular to an air supplementing device, a refrigerator and an air supplementing control method, wherein the air supplementing device is applied to the refrigerator, the refrigerator is provided with a refrigerator body and a refrigerator door for opening and closing the refrigerator body, a compartment is arranged in the refrigerator body, a door body is movably arranged at an opening of the compartment, the air supplementing device comprises an air storage tank, an air supplementing pipe, an electromagnetic valve, an air pump, a first pressure sensor and a position sensor, the air storage tank is arranged in a heat preservation layer of the refrigerator body and exchanges heat with a refrigerant pipeline of the refrigerator, and the air supplementing pipe is used for supplementing air to the inside of the refrigerator body; the electromagnetic valve is arranged on the air supplementing pipe and used for controlling the on-off of the air supplementing pipe; the output end of the air pump is communicated with the air storage tank; the first pressure sensor is used for detecting the air pressure in the box body; the position sensor is used for detecting the opening angle of the door body, and the air supplementing device can balance the pressure inside and outside the box body and better maintain the temperature inside the box before and after the door is opened, and can ensure the use continuity.

Description

Air supplementing device, refrigerator and air supplementing control method

Technical Field

The application relates to the technical field of refrigerators, in particular to an air supplementing device, a refrigerator and an air supplementing control method.

Background

With the advancement of technology, refrigeration is no longer only at the level of a-20 ℃ domestic refrigerator, but at lower temperatures: the low temperature of minus 40 ℃ to minus 60 ℃, the ultralow temperature of minus 86 ℃ and the deep low temperature of minus 150 ℃ are rapidly developed at home and abroad. However, the refrigerating temperature is too low, hot air which is more moist due to air flow disturbance when the high-capacity low-temperature preservation box is opened is introduced into the box body, the temperature and pressure of the air introduced into the refrigerator are reduced after the door is closed, and water in the hot air is condensed into frost due to the temperature reduction, so that the pressure in the box body is reduced, a larger pressure difference is generated between the inside and the outside of the box body, and the door opening action is difficult to perform.

The existing main air supplementing modes are that a balance valve is arranged and air such as liquid nitrogen is used for supplementing air, wherein the balance valve balances the internal and external pressure difference through the operation of the internal and external pressure difference of the door, but in order to prevent the valve element from being blocked caused by condensation, the air passing through the valve element can be heated, the temperature is higher, and the temperature of the box body can be increased when the air is inhaled into the box body; the problem of the rise of the box temperature is avoided by using the liquid nitrogen for supplementing air, but the liquid nitrogen is stored in the liquid nitrogen tank, so that the storage capacity is limited, and the use persistence can not be ensured.

Disclosure of Invention

The application aims to provide an air supplementing device, a refrigerator and an air supplementing control method, wherein the air supplementing device can balance the internal and external pressure of the refrigerator, better maintain the temperature in the refrigerator before and after opening the door, and ensure the use continuity.

Therefore, in a first aspect, an embodiment of the present application provides an air-supplementing device, which is applied to a refrigerator, the refrigerator has a box body and a door for opening and closing the box body, a compartment is provided in the box body, a door body is movably provided at an opening of the compartment, and the air-supplementing device includes: the air storage tank is arranged in the heat preservation layer of the tank body and exchanges heat with a refrigerant pipeline of the refrigerator, and the refrigerant pipeline cools the air in the air storage tank; one end of the air supplementing pipe is communicated with the air storage tank, and the other end of the air supplementing pipe extends into the tank body and is used for supplementing air into the tank body; the electromagnetic valve is arranged on the air supplementing pipe and used for controlling the on-off of the air supplementing pipe; the air pump is arranged outside the box body, and the output end of the air pump is communicated with the air storage tank; the first pressure sensor is arranged in the box body and used for detecting the air pressure in the box body; when the first pressure sensor detects that the difference value between the air pressure in the box body and the external air pressure reaches a first threshold value, the electromagnetic valve is opened, so that the air supplementing pipe supplements air to the interior of the box body; the position sensor is used for detecting the opening angle of the door body and adjusting the opening of the electromagnetic valve according to the opening angle of the door body detected by the position sensor.

In one possible implementation manner, the air supplementing device further comprises an induction component, wherein the induction component is used for inducing a door opening signal of the door; when the sensing assembly senses a door opening signal, if the first pressure sensor detects that a pressure difference exists between the inside and the outside of the box body, the electromagnetic valve is fully opened until the pressure of the inside and the outside of the box body is balanced.

In one possible implementation manner, the opening of the electromagnetic valve is adjustable, the sensing assembly is used for sensing a door closing signal of the door, and when the sensing assembly senses the door closing signal, the opening of the electromagnetic valve is adjusted until the pressure inside and outside the box body is balanced according to the pressure difference between the air pressure detected by the first pressure sensor and the external air pressure.

In one possible implementation manner, a plurality of compartments are arranged, the compartments are sequentially communicated in the vertical direction, the door bodies of the compartments are respectively provided with a position sensor, and the air supplementing port of the air supplementing pipe is communicated with the compartment at the uppermost part; wherein, the opening degree of the electromagnetic valve is larger than or equal to the opening degree of the electromagnetic valve when the door body positioned below is opened.

In one possible implementation, the air supply ports of the air supply pipes are arranged obliquely upward so that the air sprayed by the air supply pipes first contacts the inner ceiling wall of the uppermost compartment.

In one possible implementation, when the plurality of doors are open, the opening of the solenoid valve is a sum of the openings of the plurality of solenoid valves when the plurality of doors are individually open.

In one possible implementation, the air supplementing device further comprises a dry filter arranged at the air inlet end of the air pump.

In one possible implementation, the air supply device further includes a second pressure sensor for detecting an air pressure inside the air tank, and the air pump is operated when the air pressure inside the air tank is less than a second threshold value.

In one possible implementation, the air make-up device further includes a check valve disposed between the air pump and the air reservoir.

In a second aspect, an embodiment of the present application provides a refrigerator, including: the box body is used for opening and closing a box door of the box body opening; the air supplementing device.

In a third aspect, an embodiment of the present application provides an air-supply control method, which is applied to the above refrigerator, and includes: acquiring the pressure difference between the inside and the outside of the box body; when the pressure difference between the inside and the outside of the box body reaches a threshold value, the electromagnetic valve of the air supplementing device is controlled to be opened, so that the air in the air storage tank supplements the air in the box body through the air supplementing pipe.

In one possible implementation manner, the air supplementing device includes an induction component capable of inducing a door opening signal of the door, and the air supplementing control method further includes: when the sensing assembly senses a door opening signal, if a pressure difference exists between the inside and the outside of the box body, the electromagnetic valve is controlled to be fully opened until the air pressure inside and outside the box body is balanced.

In one possible implementation, the opening degree of the electromagnetic valve is adjustable, and the sensing assembly can sense a door closing signal of the door; the air supplementing control method further comprises the following steps: when the induction component induces a door closing signal, if a pressure difference exists between the inside and the outside of the box body, the opening of the electromagnetic valve is controlled according to the pressure difference between the inside and the outside of the box body until the air pressure between the inside and the outside of the box body is balanced.

In one possible implementation manner, a compartment is provided in the box, a door body is movably provided at an opening of the compartment, the air supplementing device further includes a position sensor for detecting an opening angle of the door body, and the air supplementing control method further includes: and controlling the opening degree of the electromagnetic valve according to the opening angle of the door body until the induction component induces a door closing signal.

In one possible implementation manner, a plurality of compartments are arranged, the compartments are sequentially communicated in the vertical direction, and the air supplementing port of the air supplementing pipe is communicated with the uppermost compartment; controlling the opening of the electromagnetic valve according to the opening angle of the door body comprises the following steps: the opening degree of the electromagnetic valve when the door body positioned below is opened is larger than or equal to that of the electromagnetic valve when the door body positioned above is opened.

According to the air supplementing device, the refrigerator and the air supplementing control method provided by the embodiment of the application, the air supplementing device detects the air pressure in the box body through the first pressure sensor, when the detected air pressure difference between the air pressure in the box body and the air pressure outside reaches the first threshold value, the electromagnetic valve is controlled to be opened, the air in the air storage tank supplements the air in the box body through the air supplementing pipe until the air pressure in the box body and the air pressure outside are balanced, the air in the air storage tank can reduce the temperature of the air due to heat exchange with the refrigerant pipeline of the refrigerator, so that the air supplemented in the box body has lower temperature, the opening angle of the door body can be detected through the position sensor, then the opening degree of the electromagnetic valve is controlled according to the opening angle of the door body, the temperature in the box body can be better maintained before and after the door is opened, and the air can be supplemented for the air storage tank, thereby the use continuity is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 shows a schematic structural diagram of an air supplementing device and a box according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a refrigerant pipeline of a refrigerator and an air storage tank according to an embodiment of the present application;

FIG. 3 shows a block flow diagram of a method for controlling air make-up provided by an embodiment of the present application;

FIG. 4 is a block flow diagram of another method for controlling air supply according to an embodiment of the present application;

Fig. 5 shows a flow chart of air supply control according to an embodiment of the present application.

Reference numerals illustrate:

1. A case; 2. a gas storage tank; 3. an air supplementing pipe; 4. an electromagnetic valve; 5. an air pump; 6. a first pressure sensor; 7. a refrigerant pipe; 8. a position sensor; 9. a second pressure sensor; 10. drying the filter; 11. a non-return valve; 12. a compartment; 13. a door body; 14. an air supplementing port; 15. a processor.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The following disclosure provides many different embodiments, or examples, for implementing different structures of embodiments of the application. In order to simplify the disclosure of embodiments of the present application, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present application. Furthermore, embodiments of the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure experiences a position flip or a change in attitude or a change in state of motion, then the indications of these directivities correspondingly change, for example: an element described as "under" or "beneath" another element or feature would then be oriented "over" or "above" the other element or feature. Accordingly, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

In order to solve the problems in the prior art, the application provides the air supplementing device, the refrigerator and the air supplementing control method, wherein the air supplementing device can balance the internal and external pressure of the refrigerator, better maintain the temperature in the refrigerator before and after opening the door, and ensure the use continuity.

Fig. 1 shows a schematic structural diagram of an air supplementing device and a box according to an embodiment of the present application; fig. 2 is a schematic structural diagram of a refrigerant pipeline of a refrigerator and an air storage tank according to an embodiment of the present application.

As shown in fig. 1-2, the embodiment of the application provides an air supplementing device, which is applied to a refrigerator, the refrigerator is provided with a refrigerator body 1 and a refrigerator door for opening and closing the refrigerator body 1, a compartment 12 is arranged in the refrigerator body 1, a door body 13 is movably arranged at an opening of the compartment 12, and the air supplementing device comprises an air storage tank 2, an air supplementing pipe 3, an electromagnetic valve 4, an air pump 5, a first pressure sensor 6 and a position sensor 8.

The air storage tank 2 is arranged in the heat preservation layer of the tank body 1 and exchanges heat with a refrigerant pipeline 7 of the refrigerator, and the refrigerant pipeline 7 cools the air in the air storage tank 2. Specifically, the air storage tank 2 is arranged in the heat preservation layer of the box body 1, so that the air storage tank 2 is in a low-temperature environment, the air in the air storage tank 2 is in a low temperature, and when the air in the air storage tank 2 is supplemented into the box body 1, the temperature in the box body 1 cannot be raised.

One end of the air supplementing pipe 3 is communicated with the air storage tank 2, and the other end of the air supplementing pipe stretches into the box body 1 and is used for supplementing air into the box body 1.

The electromagnetic valve 4 is arranged on the air supplementing pipe 3 and is used for controlling the on-off of the air supplementing pipe 3.

The air pump 5 is arranged outside the box body 1, and the output end of the air pump 5 is communicated with the air storage tank 2.

The first pressure sensor 6 is arranged in the box body 1 and is used for detecting the air pressure in the box body 1; when the first pressure sensor 6 detects that the difference between the air pressure in the case 1 and the external air pressure reaches a first threshold value, the electromagnetic valve 4 is opened to make the air supply pipe 3 supply air to the inside of the case 1.

The position sensor 8 is used for detecting the opening angle of the door body 13, and the opening degree of the electromagnetic valve 4 is adjusted according to the opening angle of the door body 13 detected by the position sensor 8.

In the application, the air pressure in the box body 1 is detected through the first pressure sensor 6, when the detected air pressure difference between the air pressure in the box body 1 and the air pressure outside reaches the first threshold value, the electromagnetic valve 4 is controlled to be opened, the air in the air storage tank 2 supplements the air in the box body 1 through the air supplementing pipe 3 until the air pressure inside and outside the box body 1 is balanced, the temperature of the air in the air storage tank 2 can be reduced due to heat exchange with the refrigerant pipeline 7 of the refrigerator, so that the air in the supplemented box body 1 has lower temperature, the opening angle of the door body 13 can be detected through the position sensor 8, then the opening degree of the electromagnetic valve 4 is controlled according to the opening angle of the door body 13, the temperature in the box can be better maintained before and after the door is opened, and the air pump 5 can supplement the air for the air storage tank 2, thereby ensuring the use continuity.

In the related art, the existing main air supplementing mode is to arrange a balance valve and supplement air by using gas such as liquid nitrogen, wherein the balance valve balances the internal and external pressure difference through the operation of the internal and external pressure difference of the door, but in order to prevent the valve member from being blocked caused by condensation, the air passing through the valve member can be heated, the temperature is higher, and the tank temperature can be increased when the air is inhaled into the tank body 1; the problem of the rise of the box temperature is avoided by using the liquid nitrogen for supplementing air, but the liquid nitrogen is stored in the liquid nitrogen tank, so that the storage capacity is limited, and the use persistence can not be ensured.

In the embodiment of the application, the air pump 5 pumps the external air into the air storage tank 2 for storage, so that the continuous air source is provided, and the use continuity can be ensured. The refrigerant pipeline 7 can exchange heat to the gas in the gas holder 2 to make the gas in the gas holder 2 can keep lower temperature, can detect the atmospheric pressure in the box 1 through first pressure sensor 6, when the atmospheric pressure difference of the inside atmospheric pressure of box 1 that detects and outside atmospheric pressure reaches first threshold value, control solenoid valve 4 opens, and the gas in the gas holder 2 is supplied into in the box 1 through air make-up pipe 3, thereby adjusts the inside atmospheric pressure of box 1, and the gas that supplies into has lower temperature in addition, can be before opening the door the better temperature in the box 1 of maintaining around.

In some embodiments, the air supplementing device further comprises an induction component, wherein the induction component is used for inducing a door opening signal of the door; when the sensing assembly senses a door opening signal, if the first pressure sensor 6 detects that a pressure difference exists between the inside and the outside of the box body 1, the electromagnetic valve 4 is fully opened until the pressure between the inside and the outside of the box body 1 is balanced.

In the application, when the door opening signal is detected through the sensing component, a user is proved to need to open the box door, if the inside and outside of the box body 1 are in pressure difference, the box body 1 is influenced to be opened smoothly, at the moment, the electromagnetic valve 4 is fully opened, and the air is quickly supplemented into the box body 1 through the air supplementing pipe 3, so that the pressure difference between the inside and the outside of the box body 1 is balanced, and further, the opening of the box door can be ensured to be quickly completed.

Specifically, the gas in the tank 1 will decrease in pressure as the temperature decreases, and the gas will be replenished into the tank 1 once the difference between the gas pressure inside and outside the tank 1 exceeds the first threshold value in the present application. However, the pressure difference between the inside and the outside of the case 1 still occurs, and the pressure difference is smaller than the first threshold, but the opening of the case 1 is also affected to a certain extent. Therefore, the application can ensure that the door can be opened smoothly by rapidly supplementing the gas into the box body 1 before the door is opened.

Specifically, the application also comprises a processor 15, wherein the processor 15 is electrically connected with the electromagnetic valve 4, the first pressure sensor 6, the air pump 5, the position sensor 8, the second pressure sensor 9 and the sensing component, and the information of the first pressure sensor 6, the position sensor 8, the second pressure sensor 9 and the sensing component is processed by the processor 15, and then the opening degree of the electromagnetic valve 4 is adjusted.

In some embodiments, the opening of the electromagnetic valve 4 is adjustable, the sensing assembly is used for sensing a door closing signal of the door, and when the sensing assembly senses the door closing signal, the opening of the electromagnetic valve 4 is adjusted until the internal pressure and the external pressure of the box body 1 are balanced according to the pressure difference between the air pressure detected by the first pressure sensor 6 and the external air pressure.

In the application, after a door closing signal is sensed through the sensing assembly, the door is proved to be closed, at the moment, the air pressure in the box body 1 is detected again through the first pressure sensor 6, the opening degree of the electromagnetic valve 4 is adjusted according to the air pressure difference between the inner side and the outer side of the box body 1, specifically, the larger the inner side and the outer side of the box body 1 is, the larger the opening degree of the electromagnetic valve 4 is, and the balance of the air pressure between the inner side and the outer side of the box body 1 is completed as soon as possible.

Specifically, the pressure difference between the inside and the outside of the box door is mainly formed by cooling the gas entering the box body 1 when the box door is opened, but the quantity of the gas is small at the beginning, and most of the gas entering from the outside is cooled along with the refrigeration of the box body 1 after the box door is closed, so that the pressure difference is generated, so that the application mainly supplements the gas after the box door is closed. However, when the door is opened, the opening of the electromagnetic valve 4 is controlled according to the opening angle of the door body 13, and the quantitative gas is supplemented into the compartment 12, so that the supplementing amount is small, the effect of reducing the hot air entering the compartment 12 is mainly achieved, and the temperature rise in the box body 1 is reduced.

In some embodiments, a compartment 12 is provided in the box 1, a door 13 is movably provided at an opening of the compartment 12, the air supplementing device further includes a position sensor 8 provided on the door 13, the position sensor 8 is used for detecting an opening angle of the door 13, and the opening of the electromagnetic valve 4 is adjusted according to the opening angle of the door 13 detected by the position sensor 8.

In the present application, a compartment 12 is provided in the case 1, and articles are stored in the compartment 12, and the compartment 12 can be opened by the door 13, and when taking and placing articles, it is necessary to first open the door and then open the corresponding door 13. The opening angle of the door body 13 can be detected through the position sensor 8, then the opening degree of the electromagnetic valve 4 is controlled according to the opening angle of the door body 13, specifically, the larger the opening angle of the door body 13 is, the larger the opening degree of the electromagnetic valve 4 is, and the more accurate the air pressure in the box body 1 can be regulated.

According to the application, the opening angle of the door plate is related to the opening degree of the electromagnetic valve 4, so that the larger the opening angle of the door plate is, the more low-temperature air is lost, and the more supplementary air is needed to be added, so that the amount of hot air entering is reduced.

In some embodiments, a plurality of compartments 12 are provided, the compartments 12 are sequentially communicated in the vertical direction, the door bodies 13 of the compartments 12 are respectively provided with a position sensor 8, and the air supplementing port 14 of the air supplementing pipe 3 is communicated with the uppermost compartment 12; wherein the opening degree of the electromagnetic valve 4 when the door body 13 positioned below is opened is more than or equal to the opening degree of the electromagnetic valve 4 when the door body 13 positioned above is opened.

In the present application, since the plurality of compartments 12 are disposed in series in the vertical direction, the door bodies 13 of the plurality of compartments 12 can be detected by the plurality of position sensors 8, respectively. The air is supplied to the uppermost compartment 12 no matter which compartment 12 is opened, because the air entering the box 1 from the outside is hot and floats upwards after the lower compartment 12 is opened, and the cold air inside the box 1 and the cold air injected into the box are sinking, the first pressure sensor 6 is arranged in the uppermost compartment 12, because the hot air entering the box 1 from the outside floats upwards, and most of the hot air is finally cooled in the upper part of the box 1, namely the uppermost compartment 12, so that the upper pressure difference is larger, the pressure difference of the upper part is balanced, and the box door can be normally opened. Simple structure need not to dispose the air filling pipe 3 alone to every compartment 12, can guarantee the precision of air filling moreover and guarantee that follow-up chamber door opens normally and opens.

Specifically, since the cooling air sinks, the lower the compartment 12 is, the more cooling air overflows, and the more hot air enters the inside of the case 1, the lower the compartment 12 is, the greater the opening degree of the solenoid valve 4 is, so as to ensure the accuracy of air supply.

In some embodiments, the air supply port 14 of the air supply duct 3 is inclined upward so that the air sprayed from the air supply duct 3 first contacts the inner ceiling wall of the uppermost compartment 12.

In the application, due to expansion with heat and contraction with cold, cold air sinks and hot air floats when the temperature difference exists, and the air supplementing port 14 of the air supplementing pipe 3 is obliquely arranged upwards, so that sprayed gas firstly contacts the inner top wall of the uppermost compartment 12 and then sinks, and no matter which compartment 12 is opened, the supplemented cold air can enter the opened compartment 12 from top to bottom.

Of course, some outside air enters the open chamber 12, and the temperature of the entering air is higher than the temperature inside the chamber 12, so that the air rises and finally concentrates in the uppermost chamber 12. After the door is closed, the air pressure of the uppermost compartment 12 is detected by the first air pressure sensor, and since the high-temperature air is in the uppermost compartment 12, the air can be supplemented while the air is supplemented, the compartment temperature can be maintained by supplementing a certain amount of cold air into the uppermost compartment 12.

In some embodiments, when the plurality of door bodies 13 are opened, the opening degree of the solenoid valve 4 is the sum of the opening degrees of the plurality of solenoid valves 4 when the plurality of door bodies 13 are opened individually.

Specifically, when the door bodies 13 of the two compartments 12 are opened simultaneously, since both the compartments 12 are overflowed with cool air and both the cool air is introduced into the compartments 12, the opening of the solenoid valve 4 is the sum of the openings of the solenoid valves 4 corresponding to the individual opening of the door bodies 13 of the two compartments 12.

After the door is opened, four intermediate chambers 12 are arranged in total, and a processor 15 receives information of the position sensor 8 to judge the door opening position (a plurality of layers of door bodies 13 are opened) and the door opening angle and adjusts the opening of the electromagnetic valve 4 according to the table 1.

TABLE 1

K1, K2. in the table is the set solenoid valve 4 opening and K1, K2.. Because only a small amount of air supplement is performed when the door is opened, K1-K5 are minimum values, and K5 is not fully opened. When two or more small doors are simultaneously opened, the valve opening k=Σk.

Before receiving the door closing signal, the processor judges the door opening condition in real time through the information of the position sensor 8, so as to adjust the opening of the electromagnetic valve 4 until receiving the door closing signal. After receiving the door closing signal, the processor receives the information of the first pressure sensor 6, calculates to obtain the internal and external pressure difference delta P, and according to delta P: k=a, wherein K is the valve opening, a is a set proportion value, the value is unchanged, when the internal and external pressure difference changes, the valve opening is also adjusted in real time until the pressure is balanced, and finally, the electromagnetic valve 4 is closed, and the control is finished.

In some embodiments, the air make-up device further comprises a dry filter 10 disposed at the air intake end of the air pump 5.

In the application, the air entering the air storage tank 2 can be dried and filtered by the drying filter 10, and the air pumped by the air pump 5 can be prevented from frosting.

In some embodiments, the air supplementing device further comprises a second pressure sensor 9, wherein the second pressure sensor 9 is used for detecting the air pressure inside the air storage tank 2, and the air pump 5 is operated when the air pressure inside the air storage tank 2 is smaller than the second threshold value.

In the application, the air pressure in the air storage tank 2 can be detected through the second pressure sensor 9, when the air pressure in the air storage tank 2 is smaller than the set value, namely the second threshold value, the air pump 5 is controlled to supplement air to the air storage tank 2 until the air pressure in the air storage tank 2 reaches the set value, the air pressure in the air storage tank 2 can be ensured to be in a set range, the durability of use is ensured, and meanwhile, the accuracy of air supplement is ensured.

In some embodiments, the air supplementing device further comprises a non-return valve 11 arranged between the air pump 5 and the air reservoir 2.

In the application, the gas in the gas storage tank 2 is prevented from leaking out by the check valve 11, so that the safety is ensured.

This air supplementing device detects the atmospheric pressure in the box 1 through first pressure sensor 6, when the atmospheric pressure difference of the inside atmospheric pressure of box 1 that detects and outside atmospheric pressure reaches first threshold value, control solenoid valve 4 opens, the inside air supplementing of box 1 is carried out to the gas in the gas holder 2 through air supplementing pipe 3, until the inside and outside atmospheric pressure of box 1 is balanced, the gaseous temperature of gas can be reduced owing to carry out heat transfer with the refrigerant pipeline 7 of refrigerator in the gas holder 2, thereby make the gaseous temperature in the moisturizing box 1 have lower, can be better before opening the door and after keeping the temperature in the box, air pump 5 can be for the gas holder 2 tonifying qi, thereby guarantee the persistence of use.

The embodiment of the application provides a refrigerator, which comprises: the box body 1, the box body 1 is used for opening and closing the box door of the opening of the box body 1; the air supplementing device.

According to the air supplementing device, the air supplementing device can realize the upper-period operation, and the refrigerant pipeline 7 in the refrigerator cools and cools the air in the air storage tank 2, so that the air supplemented into the box body 1 has a lower temperature, and the temperature of the box body 1 cannot be increased.

As shown in fig. 3-5, an embodiment of the present application provides an air supply control method, which is applied to the above refrigerator, and includes:

S1, acquiring the pressure difference between the inside and the outside of a box body 1;

s2, when the pressure difference between the inside and the outside of the box body 1 reaches a first threshold value, controlling the electromagnetic valve 4 of the air supplementing device to be opened so as to supplement air in the box body 1 through the air supplementing pipe 3 by the air in the air storage tank 2.

Specifically, the pressure inside the box body 1 is detected through the first pressure sensor 6 and compared with the external standard atmospheric pressure, so that the air pressure difference inside and outside the box body 1 is obtained, the main air pressure difference reaches a first threshold value, and then the electromagnetic valve 4 is opened to supplement air inside the box body 1 through the air supplementing pipe 3 until the air pressure inside and outside the box body 1 is balanced.

In some embodiments, the air supplementing device comprises an induction component capable of inducing a door opening signal of the door, and the air supplementing control method further comprises the following steps:

And S3, when the induction component induces a door opening signal, if a pressure difference exists between the inside and the outside of the box body 1, the electromagnetic valve 4 is controlled to be fully opened until the air pressure inside and outside the box body 1 is balanced.

In the application, when the door opening signal is detected, if the box body 1 is in a closed state at the moment, if the air pressure difference exists between the inside and the outside of the box body 1, the normal opening of the box door is influenced, so that the electromagnetic valve 4 is fully opened at the moment, and the air is rapidly supplemented into the box body 1 through the air supplementing pipe 3 until the air pressure inside and outside the box body 1 is balanced, so that the box door can be ensured to be smoothly opened.

In some embodiments, the opening degree of the electromagnetic valve 4 is adjustable, and the sensing assembly can sense a door closing signal of the door; the air supplementing control method further comprises the following steps:

And S4, when the induction component induces a door closing signal, if a pressure difference exists between the inside and the outside of the box body 1, controlling the opening of the electromagnetic valve 4 according to the pressure difference between the inside and the outside of the box body 1 until the air pressure inside and outside the box body 1 is balanced.

In the application, after the induction component induces the closing of the box door, the opening of the electromagnetic valve 4 is controlled according to the difference between the internal pressure and the external pressure, and the pressure inside and outside the box body 1 is quickly adjusted until the pressure inside and outside the box body 1 is balanced.

Alternatively, the air supply amount may be controlled according to the opening time period of the solenoid valve 4, and the opening degree of the solenoid valve 4 is set to a standard value.

In some embodiments, a compartment 12 is provided in the box 1, a door 13 is movably provided at an opening of the compartment 12, the air supplementing device further includes a position sensor 8 for detecting an opening angle of the door 13, and the air supplementing control method further includes:

And S5, controlling the opening degree of the electromagnetic valve 4 according to the opening angle of the door body 13 until the induction component induces a door closing signal.

In the application, the opening degree of the electromagnetic valve 4 is controlled according to the opening angle of the door body 13, the larger the opening angle of the door body 13 is, the more the lost cold air is, and the more the entering external hot air is, so the opening degree of the electromagnetic valve 4 is controlled according to the opening angle of the door body 13, the larger the opening angle of the door body 13 is, the opening degree of the electromagnetic valve 4 is adjusted according to the opening angle of the door body 13, and the influence of the external hot air on the air pressure and the temperature in the compartment 12 is reduced when the door body 13 is opened.

In some embodiments, a plurality of compartments 12 are provided, the plurality of compartments 12 are sequentially communicated in the vertical direction, and the air supplementing port 14 of the air supplementing pipe 3 is communicated with the uppermost compartment 12; controlling the opening degree of the solenoid valve 4 according to the opening angle of the door body 13 includes:

S51, the opening of the electromagnetic valve 4 when the lower door 13 is opened is greater than or equal to the opening of the electromagnetic valve 4 when the upper door 13 is opened.

In the application, as the plurality of compartments 12 are arranged and the plurality of compartments 12 are communicated in the vertical direction, the mass of hot air is small and can rise according to the fact that the mass of cold air is large and sinking, and the lower the opened compartment 12 is, the more cold air is lost, so the lower the opened compartment 12 is, the opening degree of the electromagnetic valve 4 is correspondingly increased, so that the supplementing amount of cold air can effectively fill the gas lost in the compartment 12, and the entering of external hot air is prevented.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a make-up air device, is applied to the refrigerator, the refrigerator has box (1) and is used for opening and close the chamber door of box (1), the inside of box (1) is provided with compartment (12), the opening part activity of compartment (12) is provided with door body (13), its characterized in that, make-up air device includes:

The air storage tank (2) is arranged in the heat preservation layer of the box body (1) and exchanges heat with a refrigerant pipeline (7) of the refrigerator, and the refrigerant pipeline (7) cools the air in the air storage tank (2);

the air supplementing pipe (3), one end of the air supplementing pipe (3) is communicated with the air storage tank (2), and the other end of the air supplementing pipe stretches into the box body (1) and is used for supplementing air into the box body (1);

the electromagnetic valve (4) is arranged on the air supplementing pipe (3) and used for controlling the on-off of the air supplementing pipe (3);

The air pump (5) is arranged outside the box body (1), and the output end of the air pump (5) is communicated with the air storage tank (2);

The first pressure sensor (6) is arranged in the box body (1) and is used for detecting the air pressure in the box body (1), and when the first pressure sensor (6) detects that the difference value between the air pressure in the box body (1) and the external air pressure reaches a first threshold value, the electromagnetic valve (4) is opened, so that the air supplementing pipe (3) supplements air to the interior of the box body (1); and

The position sensor (8) is used for detecting the opening angle of the door body (13), and the opening degree of the electromagnetic valve (4) is adjusted according to the opening angle of the door body (13) detected by the position sensor (8);

The plurality of compartments (12) are sequentially communicated with each other along the vertical direction, the position sensors (8) are respectively arranged on the door bodies (13) of the plurality of compartments (12), and the air supplementing ports (14) of the air supplementing pipes (3) are communicated with the uppermost compartment (12);

Wherein the opening degree of the electromagnetic valve (4) is larger than or equal to the opening degree of the electromagnetic valve (4) when the door body (13) positioned below is opened.

2. The air make-up device of claim 1, further comprising an induction assembly for inducing a door opening signal of the door;

When the induction component induces the door opening signal, if the first pressure sensor (6) detects that the pressure difference exists between the inside and the outside of the box body (1), the electromagnetic valve (4) is fully opened until the pressure between the inside and the outside of the box body (1) is balanced.

3. The air supplementing device according to claim 2, wherein the opening of the electromagnetic valve (4) is adjustable, the sensing assembly is used for sensing a door closing signal of the door, and when the sensing assembly senses the door closing signal, the opening of the electromagnetic valve (4) is adjusted until the internal pressure and the external pressure of the box body (1) are balanced according to the pressure difference between the air pressure detected by the first pressure sensor (6) and the external air pressure.

4. The air supply device according to claim 1, characterized in that the air supply opening (14) of the air supply tube (3) is arranged obliquely upwards so that the air sprayed by the air supply tube (3) first contacts the inner top wall of the uppermost compartment (12).

5. The air supplementing device according to claim 1, wherein the opening degree of the electromagnetic valve (4) is a sum of the opening degrees of the plurality of electromagnetic valves (4) when the plurality of door bodies (13) are opened individually when the plurality of door bodies (13) are opened.

6. The air supply device according to claim 1, further comprising a dry filter (10) provided at an air intake end of the air pump (5).

7. The air supply device according to claim 1, further comprising a second pressure sensor (9), wherein the second pressure sensor (9) is configured to detect an air pressure inside the air tank (2), and wherein the air pump (5) is operated when the air pressure inside the air tank (2) is smaller than a second threshold value.

8. The air supply device according to claim 1, characterized in that it further comprises a non-return valve (11) arranged between the air pump (5) and the air reservoir (2).

9. A refrigerator, comprising:

the box body (1), the said box body (1) is used for opening and closing the said box door of the opening of the said box body (1); and

An air supplementing device as claimed in any one of claims 1 to 8.

10. The air supply control method applied to the refrigerator according to claim 9, characterized in that the air supply control method comprises:

Acquiring the pressure difference between the inside and the outside of the box body (1);

When the pressure difference between the inside and the outside of the box body (1) reaches a first threshold value, an electromagnetic valve (4) of the air supplementing device is controlled to be opened, so that air in the air storage tank (2) supplements air in the box body (1) through the air supplementing pipe (3).

11. The method of claim 10, wherein the air make-up device includes an inductive component that senses a door open signal, the method further comprising:

when the induction component induces a door opening signal, if a pressure difference exists between the inside and the outside of the box body (1), the electromagnetic valve (4) is controlled to be fully opened until the air pressure inside and outside the box body (1) is balanced.

12. The air supply control method according to claim 11, wherein the opening degree of the electromagnetic valve (4) is adjustable, and the sensing assembly senses a door closing signal of the door; the air supplementing control method further comprises the following steps:

When the induction component induces a door closing signal, if a pressure difference exists between the inside and the outside of the box body (1), the opening of the electromagnetic valve (4) is controlled according to the pressure difference between the inside and the outside of the box body (1) until the air pressure inside and outside the box body (1) is balanced.

13. The air supply control method according to claim 12, characterized in that a compartment (12) is provided inside the case (1), a door body (13) is movably provided at an opening of the compartment (12), the air supply device further includes a position sensor (8) for detecting an opening angle of the door body (13), and the air supply control method further includes:

And controlling the opening degree of the electromagnetic valve (4) according to the opening angle of the door body (13) until the induction component induces the door closing signal.

14. The air supply control method according to claim 13, wherein a plurality of the compartments (12) are provided, the plurality of compartments (12) are sequentially communicated in the vertical direction, and the air supply port (14) of the air supply pipe (3) is communicated with the uppermost compartment (12); the controlling the opening degree of the electromagnetic valve (4) according to the opening angle of the door body (13) comprises:

The opening degree of the electromagnetic valve (4) is larger than or equal to the opening degree of the electromagnetic valve (4) when the door body (13) positioned above is opened when the door body (13) positioned below is opened.