CN113883816B - How to control the refrigerator - Google Patents

Abstract

The present invention provides a method for controlling a refrigerator, wherein the refrigerator has a normal inflation mode and a fast inflation mode, and the control method includes: obtaining the ambient temperature T of the refrigerator, and comparing the ambient temperature T with the preset temperature T0 In contrast, when T≥T0, the fast inflation mode is turned on, otherwise, the normal inflation mode is turned on; the fast inflation mode specifically includes: obtaining the opening information of the door body, and sealing the refrigerator box and the door body after the door body is opened. The airbag is inflated, and the pressure p1 in the sealed airbag is obtained at the same time. When the pressure p1 reaches the preset pressure p2, the inflation is stopped; the door closing information is obtained, and after the door is closed, continue to inflate the aforementioned sealed airbag until the airbag is sealed When the pressure p1 inside reaches the sealing pressure p3, stop inflating. The invention reduces the heat exchange between the storage space and the surrounding environment, improves the sealing rate, and further enhances the heat preservation effect.

Description

How to control the refrigerator

technical field

The invention relates to a control method for a refrigerator, in particular to a control method for a refrigerator with a faster air bag sealing rate.

Background technique

At present, some refrigerators use auxiliary airbags to cooperate with door seals to increase the sealing effect and reduce heat load. However, the existing airbag control logic is that the door body is opened, the airbag exhausts the gas, the door is closed, and the airbag starts to inflate again. In summer, the ambient temperature is higher, and it takes more time for the airbag to inflate to the sealing pressure, so the sealing cannot be achieved quickly, which affects the heat preservation effect.

In view of this, it is necessary to improve the existing refrigerator control method to solve the above problems.

Contents of the invention

The object of the present invention is to provide a method for controlling a refrigerator with a faster air bag sealing rate.

In order to achieve the purpose of the above invention, the present invention provides a control method for a refrigerator, wherein the refrigerator has a normal inflation mode and a fast inflation mode, and the control method includes: obtaining the ambient temperature T of the refrigerator, and setting the ambient temperature T And compared with the preset temperature T0, when T≥T0, the fast inflation mode is turned on, otherwise, the normal inflation mode is turned on; the fast inflation mode specifically includes: obtaining the door opening information, and after the door is opened, the refrigerator box and The sealed airbag between the doors is inflated, and the pressure p1 in the sealed airbag is obtained at the same time. When the pressure p1 reaches the preset pressure p2, the inflation is stopped; the door closing information is obtained, and the aforementioned sealed airbag is continued after the door is closed. Carry out inflation until the pressure p1 in the sealed air bag reaches the sealing pressure p3 and stop the inflation.

As a further improvement of the present invention, the critical pressure of the airtight air bag when it is expanded and deformed is p4, and p4×80%<p2<p4.

As a further improvement of the present invention, the fast inflation mode also includes: after the door is opened, inflating the sealed air bag between the refrigerator box and the door, first obtaining the opening time t1 of the door, and when the opening time t1 reaches the preset At time t0, compare p1 with p2. When p1<p2, continue to inflate until p2 is reached.

As a further improvement of the present invention, the normal inflation mode includes: acquiring door opening information, controlling the sealing airbag to completely exhaust, when the door is closed, acquiring door closing information, inflating the sealing airbag, and increasing p1 from 0 to sealing Pressure p3.

As a further improvement of the present invention, the critical pressure when the sealed airbag just generates force on the door or box after inflating is p5, p5<p3<p5×120%.

As a further improvement of the present invention, the refrigerator includes a box with an inner liner, a door matched with the box, the door has a door liner, a storage space is formed between the door liner and the liner, the The door liner has a door liner and a liner frame protruding backward from the door liner to the inner side of the liner, the airtight air bag is arranged between the liner and the liner frame to seal the storage space, and the refrigerator also includes a fixed The fixing part of the sealed airbag, the air pump matched with the sealed airbag, the fixed part has a deformation part that covers the outside of the sealed airbag and elastically deforms with the inflation and deflation of the sealed airbag, and is connected with the deformation part to be fixed to the inner tank or the liner frame the fixed part.

As a further improvement of the present invention, the sealed airbag is fixed on the inner tank, and a groove and a fixing structure are formed on the inner tank adjacent to the liner frame, and the sealed airbag is accommodated in the groove. The fixing part is fixed outside the airtight airbag through the cooperation of the fixing part and the fixing structure.

As a further improvement of the present invention, the liner has an inner wall adjacent to the liner frame, and when the door is opened, the outer wall of the fixing member adjacent to the liner frame is flush with the inner wall of the liner.

As a further improvement of the present invention, the inner container has an inner container body and a connecting piece fixed at the front end of the inner container body, and the groove and the fixing structure are formed on the connecting piece.

As a further improvement of the present invention, the liner frame has a fitting wall that fits with the sealing airbag, and the fitting wall is recessed with a sealing groove that fits with the sealing airbag.

Beneficial effects of the present invention: the control method of the refrigerator of the present invention pre-inflates the airbag to the preset pressure after the door is opened, and continues to inflate the airbag after the door is closed, from the preset pressure to the sealing pressure, which greatly shortens the The inflation time of the airbag. The heat exchange between the storage space and the surrounding environment is reduced, the sealing rate is improved, and the heat preservation effect is enhanced.

Description of drawings

Fig. 1 is a flow chart of the control method of the refrigerator of the present invention.

Fig. 2 is a schematic perspective view of the refrigerator of the present invention.

Fig. 3 is a side exploded view of the refrigerator of the present invention.

Fig. 4 is an exploded perspective view of the refrigerator of the present invention.

Fig. 5 is a sectional view of the refrigerator airbag of the present invention.

Fig. 6 is an exploded cross-sectional view of the fixing piece and the liner.

Fig. 7 is a sectional view of another embodiment of the refrigerator airbag of the present invention.

Fig. 8 is a cross-sectional view of the airbag in Fig. 7 after being inflated.

Fig. 9 is a sectional view of the second embodiment of the refrigerator door liner of the present invention.

Fig. 10 is a cross-sectional view of the airbag in Fig. 9 after inflation.

Fig. 11 is a cross-sectional view of the third embodiment of the refrigerator door liner of the present invention.

Fig. 12 is a cross-sectional view of the fourth embodiment of the refrigerator door liner of the present invention.

Fig. 13 is a cross-sectional view of a fifth embodiment of the refrigerator door liner of the present invention.

Fig. 14 is a cross-sectional view of the evaporation chamber of the refrigerator of the present invention.

Fig. 15 is an enlarged view at A in Fig. 14 .

Detailed ways

The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. However, this embodiment does not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to this embodiment are included in the protection scope of the present invention.

Please refer to Figure 1 which shows the control method of the refrigerator of the present invention. Specifically, the refrigerator has a normal inflation mode and a fast inflation mode, and the control method includes:

Obtain the ambient temperature T of the refrigerator, and compare the ambient temperature T with the preset temperature T0. When T≥T0, the fast inflation mode is turned on, otherwise, the normal inflation mode is turned on;

The fast inflation mode specifically includes: obtaining the opening information of the door body 2, inflating the sealed air bag 3 between the refrigerator box 1 and the door body 2 after the door body 2 is opened, and obtaining the pressure p1 in the sealed air bag 3 at the same time. When the pressure p1 reaches the preset pressure p2, stop inflation;

Obtain the closing information of the door body 2, and after the door body 2 is closed, continue to inflate the aforementioned sealing air bag 3 until the pressure p1 in the sealing air bag 3 reaches the sealing pressure p3 and stop inflating.

The fast inflation mode is mainly to pre-charge the sealed airbag 3 with a certain amount of gas after the door body 2 is opened, so that after the door body 2 is closed, the inflation time for the sealed airbag 3 to be inflated to the sealing pressure p3 is reduced, so that the sealed airbag 3 Enter the sealed state in advance, reduce the heat exchange of the storage space 12, and improve the sealing effect.

Generally, a detection device is installed at the handle position of the refrigerator. When the user touches the handle, the detection device detects the action and feeds it back to the control unit.

The fast inflation mode can have two working modes, the first one is: first exhaust the sealed airbag 3 completely, and then inflate to p2; the second one is: control the exhaust of the sealed airbag 3 and detect the pressure in real time, when When it is detected that the pressure drops to p2, the exhaust valve is controlled to be closed.

Among them, in the second working mode, due to the faster exhaust speed of the sealed air bag 3, coupled with the sensitivity limitation of the detection instrument and the exhaust valve, it is difficult to precisely control the exhaust to p2, which is usually lower than p2, so it is still necessary to continue Re-inflate airbag 3 to p2.

Therefore, in the first working mode, the pressure sensor does not need to detect during the exhaust process, and the repeated opening of the exhaust valve is also avoided.

And the gas in the airtight air bag 3 was filled by the air pump 5 from the evaporation chamber 15 when the door body 2 was closed last time. Therefore, there is a certain time interval from the last time the door body 2 is closed to the door body 2 is opened this time. The temperature of the gas in the airtight bag 3 will inevitably rise. Therefore, exhausting the gas in the airtight bag 3 before filling it with new low-temperature and low-humidity gas will help reduce heat exchange and improve the sealing effect.

Firstly, by judging the ambient temperature T of the refrigerator and the preset temperature T0, when T≥T0, it means that the current ambient temperature of the refrigerator is relatively high, and the working condition is relatively bad. Therefore, the fast inflation mode is turned on, otherwise, the refrigerator If the ambient temperature is low and the working condition is relatively good, the normal inflation mode will be turned on.

Assuming that the critical pressure of the sealed airbag 3 is p4 when it is inflated and deformed or not deformed, when the sealed airbag 3 is completely deflated, the sealed airbag 3 is in a wrinkled state, and is inflated from a wrinkled state to a non-wrinkled state. 3 is inflated, the material of the sealed airbag 3 is elastically deformed due to expansion, and p4 is the critical pressure of the elastically deformed and non-elastically deformed material of the sealed airbag 3 .

Among them, p4×80%<p2<p4, setting the preset pressure p2 to a certain range can avoid repeated inflation if the pressure inside the sealed airbag 3 is detected to be lower than p2 when the preset pressure p2 is set to a fixed value Occurs, thereby reducing the working times of the air pump 5 and increasing the working life.

The fast inflation mode also includes: inflating the sealed air bag 3 between the refrigerator box 1 and the door 2 after the door 2 is opened, first obtaining the opening time t1 of the door 2, and when the opening time t1 reaches the preset time t0 , then compare p1 with p2, and when p1<p2, continue to inflate until p2 is reached. This is because it takes a certain amount of time to inflate the sealed airbag 3 to p2, and p2 cannot be reached at the initial stage of inflation. Therefore, there is no need to detect the pressure p1 in the sealed airbag 3 at the initial stage, thereby reducing the operating frequency of the pressure sensor.

Assuming that the critical pressure when the sealing airbag 3 is inflated to just produce a force on the door body 2 or the box body 1 is p5, then p5<p3<p5×120%, which is due to the need to make the sealing airbag 3 and the door body 2 or box 1 The sealing effect is better, usually make p3 slightly larger than p5, in order to avoid damage to door body 2 or box body 1 caused by excessive expansion of sealing air bag 3, p3 must not exceed a certain value.

The normal inflation mode includes: obtaining the opening information of the door body 2, controlling the sealing airbag 3 to completely exhaust, when the door body 2 is closed, obtaining the closing information of the door body 2, and inflating the sealing airbag 3, so that p1 rises from 0 to the sealing pressure p3 .

It can be seen that the normal inflation mode rises from 0 to p3, and the fast inflation mode rises from p2 to p3. Obviously, after the door body 2 is closed, the inflation time of the fast inflation mode is shorter than that of the normal inflation mode.

The present invention also provides a refrigerator, which includes a box body 1 with an inner liner 11, a door body 2 matched with the box body 1, the door body 2 has a door liner 21, the door liner 21 and the liner liner 11 A storage space 12 is formed between them. The door lining 21 has a door lining 211 and a lining frame 212 protruding backward from the door lining 211 to the inside of the inner tank 11, wherein the refrigerator also includes a Between the lining frame 212 to seal the airbag 3 of the storage space 12, the fixing part 4 for fixing the airbag 3, and the air pump 5 matched with the airbag 3, the fixing part 4 has the function of covering the outside of the airbag 3 and accompanying the airbag 3 The deformation portion 41 elastically deforms when inflated and deflated, and the fixing portion 42 connected to the deformation portion 41 to be fixed to the liner 11 or the liner frame 212 .

Specifically, as shown in FIG. 2 to FIG. 6 , in this embodiment, the door-opening side of the refrigerator is located on the left side. Of course, in other embodiments, the door-opening side may also be located on the right side. As shown in FIG. 1 , the door shell is not shown on the door body 2 , only the door liner 21 is shown. The liner frame 212 protrudes backward from the periphery of the door liner 211 , and the airbag 3 is mainly used to seal the inner wall 115 of the liner 11 and the liner frame 212 to further enhance the sealing effect. Certainly, the airbag 3 may be arranged in a ring shape in cooperation with the inner wall 115 and the lining frame 212 , or may be only arranged at a partial position between the inner wall 115 and the lining frame 212 .

In this embodiment, the liner frame 212 has a fixed wall 213 on the inner side and a matching wall 214 on the outer side, the fixing wall 213 is mainly used to set the bottle seat, and the airbag 3 is located on the matching wall 214 and the inner container 11 The storage space 12 is sealed between the inner walls 115 of the door body 2 , wherein the door body 2 also has a sealing portion 22 extending laterally from the front side of the matching wall 214 .

In this embodiment, the box body 1 is also formed with a frame opening 13 located at its front side, and the sealing portion 22 is provided with a door seal 23 that can be adsorbed to the frame opening 13, and the door seal 23 Not only can the sealing of the storage space 12 be realized, but also the fixing of the door body 2 and the box body 1 can be realized, combined with the air bag 3 to seal the inner wall 115 and the lining frame 212 of the liner 11, that is, the only connection between the door body 2 and the box body 1 The two contact surfaces (the sealing portion 22 and the mating wall 214 ) are both sealed, so the sealing effect can be further improved and the influence of the external environment on the temperature in the storage space 12 can be reduced.

The door seal 23 includes a fixed foot 231 fixed to the sealing portion 22, and a sealing body 232 extending backward from the fixing foot 231. The sealing body 232 has a primary air chamber and a secondary air chamber adjacently arranged. , wherein, under normal circumstances, magnetic elements are provided in the main air chamber or the auxiliary air chamber to attract and cooperate with the magnetic elements on the frame opening 13, thereby maintaining the closed state of the door body 2.

Since the shell 14 of the box body 1 is made of metal, and the front side of the shell 14 has a bent edge, the bent edge is the magnetic element, therefore, the magnetic element can be directly attracted to the bent edge. Of course, in order to reduce production cost and reduce heat exchange, the main air chamber or auxiliary air chamber may not be provided with magnetic elements, and the air chamber provided with magnetic elements provides further deformation space for the door seal, thereby improving the sealing effect. (This structure needs to cooperate with the structure of the lining frame 212 or the structure of the liner 11 to be realized, see the following embodiments for details)

In this embodiment, the airbag 3 is fixed on the inner tank 11, specifically on the inner wall of the inner tank 11 adjacent to the liner frame 212, and on the inner tank 11 adjacent to the matching wall 214. A groove 111 and a fixing structure 112 are formed at the position, the airbag 3 is accommodated in the groove 111 , and the fixing part 4 is fixed outside the airbag 3 through the cooperation of the fixing part 42 and the fixing structure 112 . Of course, in other embodiments, the lining frame 212 may also be provided with the groove 111 and the fixing structure 112 for accommodating the airbag 3 .

Specifically, in this embodiment, the liner 11 has a liner body 113 and a connecting piece 114 fixed to the front end of the liner body 113, the groove 111 and the fixing structure 112 are formed on the connecting piece 114, Since the inner tank 11 is usually formed by blister, it is not easy to arrange the fixed structure 112 on its surface. Therefore, by setting the connecting piece 114 at the front end of the inner tank body 113, it is convenient to arrange the groove 111 and the fixed structure 112. On the connecting piece 114 , it is convenient to assemble the fixing piece 4 .

The connecting piece 114 is generally a plastic piece and is arranged around the front end of the liner body 113. In this embodiment, the fixing structures 112 are arranged on the front and rear sides of the groove 111, each of the fixing structures 112 It has a card slot 1121 recessed from the surface of the connector 114 and a limiting slot 1122 on one side of the card slot 1121 .

The connector 114 also has an inner tank fixing end 1141 connected to the rear fixing structure 112 to be fixed to the inner tank body 113, and an outer shell fixing end connected to the front fixing structure 112 to be fixed to the metal outer shell 14 of the box body 1. end 1142, the fixed end 1141 of the liner is extended backwards, and the fixed end 1142 of the outer shell is extended outwards along the transverse direction. Therefore, the connecting piece 114, the inner liner body 113 and the outer shell 14 jointly form a foaming cavity . In this embodiment, the connector 114 can bond the liner fixed end 1141 to the liner body 113 with adhesive glue, and the shell fixed end 1142 is fixed by matching with the U-shaped groove of the shell 14, of course In other embodiments, the connecting member 114 may also be provided with a matching structure fixed with the liner body 113 .

In this embodiment, the fixing portion 42 of the fixing member 4 is respectively arranged on the front and rear sides of the deformation portion 41 so as to cooperate with the groove 111 and the fixing structure 112, wherein the deformation portion 41 and The fixed parts 42 are respectively formed of plastics of different materials through soft and hard co-extrusion processes, that is, the deformable part 41 is made of a material that is easily deformed, while the fixed part 42 is made of a material that is not easily deformed, and different materials are realized through soft and hard co-extrusion. Co-molding improves the production efficiency of the fixing part 4 . Of course, in other embodiments, the deformation part 41 can also be formed separately and assembled with the fixing part 42 to form the fixing part 4 .

In this embodiment, the elastic modulus of the deformation part 41 is smaller than the elastic modulus of the airbag 3, and the greater the elastic modulus, the greater the rigidity, that is to say, the less likely to deform. Therefore, the deformation part 41 Compared with the air bag 3, it is easier to deform, that is, as long as the air bag 3 exerts a force on the deforming portion 41, the deforming portion 41 will immediately deform. On the one hand, it is easy to control the inflation amount of the air bag 3; Avoid damage to the air bag 3 due to excessive inflation of the air bag 3 . Moreover, the deformation part 41 is made of a wear-resistant material, so that the deformation part 41 is not easily damaged by friction with the lining frame 212 even during long-term use.

The fixing portion 42 has a hook 421 and a limiting portion 422 that cooperate with the locking groove 1121 and the limiting groove 1122 of the fixing structure 112 , where the locking hook 421 and the locking groove 1121 cooperate to realize positioning in the lateral direction. The limiting portion 422 cooperates with the limiting groove 1122 , on the one hand, it can further strengthen the fixing effect of the hook 421 and the locking groove 1121 .

On the other hand, during the long-term use of the refrigerator, the risk of damage to the hook 421 caused by the deformation of the deformation part 41 and the pulling of the fixing part 42 is reduced, and at the same time, it is convenient for installation. Therefore, by providing the fixing member 4 , there is no need to add a fixing structure 112 to the airbag 3 , only the airbag 3 is placed in the groove 111 , and then the fixing member 4 is installed, which is simple and efficient to install.

The liner 11 has an inner wall 115 adjacent to the liner frame 212, and in an open state, the fixing member 4 is adjacent to the outer wall of the liner frame 212 (that is, the deformation portion 41) and the inner wall of the liner 11. 115 is flush with each other, that is, the airbag 3 is not inflated and the deformation portion 41 is in an undeformed state. At this time, the door body 2 can be opened and closed smoothly without being interfered by the deformation portion 41 .

In this embodiment, the liner frame 212 protrudes backward from the periphery of the door liner 211 , that is, it is arranged around the inner wall 115 of the liner 11 , and the airbag 3 corresponds to the connecting piece 114 and the liner frame 212 It is also arranged in a ring shape; and the ring-shaped air bag 3 can be arranged in a multi-stage structure (not shown), and two adjacent sections are connected to each other through air holes, and the inner diameter of the air holes is smaller than the inner diameter of each air bag 3 . Connecting each segment of the airbags 3 through air holes can effectively reduce the air convection in the airbags 3 , thereby significantly reducing the heat exchange efficiency and reducing the influence on the temperature in the storage space 12 .

In this embodiment, the matching wall 214 is arranged to extend obliquely from the back to the front and toward the inner wall 115 of the inner container 11, which is to facilitate the demoulding of the door liner 21 from the blister punch. Of course, in other embodiments, The matching wall 214 can also be extended in a direction perpendicular to the door liner 211. In order to further strengthen the sealing effect of the air bag 3, the matching wall 214 is also concavely provided with a hole that matches the air bag 3. Seal groove 24. By setting the sealing groove 24, the sealing area of the airbag 3 is increased, on the one hand, the sealing effect is increased; The forward force component prevents the door body 2 from opening.

Specifically, the matching wall 214 has at least two groove walls forming the sealing groove 24, the more groove walls forming the sealing groove 24, the larger the area sealed with the airbag 3, the better the sealing effect, and the friction force is also lower. The bigger it is, the more difficult it is for the door body 2 to be opened. In this embodiment, the sealing groove 24 is arranged around the fitting wall 214 , so that it can cooperate with the annular airbag 3 to increase the sealing effect. Of course, in other embodiments, the sealing groove 24 can also be arranged at a local position of the matching wall 214 , such as some places that are prone to cold leakage, for example, at a position close to the door opening side of the door body 2 .

As shown in Figure 5, it is the first embodiment of the door liner 21 of the refrigerator of the present invention, the said matching wall 214 has a first groove wall 241 and a second groove wall 242 which form the sealing groove 24 and are connected back and forth, the first The groove wall 241 is located on the rear side of the second groove wall 242. The first groove wall 241 is formed by extending vertically from the mating wall 214 toward the door liner 211. The second groove wall 242 is formed from the end of the first groove wall 241 toward the matching The wall 214 adjacent to the inner wall 115 of the liner 11 is formed to extend forward obliquely.

Therefore, neither the first groove wall 241 nor the second groove wall 242 extends obliquely forward away from the inner wall 115 of the liner 11 adjacent to the mating wall 214, and the door liner 21 is generally mainly formed by blistering, Moreover, the plastic-absorbing punch is used. When demoulding, the door liner 21 moves upwards for demoulding. During the upward movement, except for the friction between the door liner 21 and the surface of the punch, there is no other external force to prevent the upward movement, so that the demoulding is easier. Smooth, at the same time, also increases the sealing effect.

When the airbag 3 is inflated, it can be in contact with both the first groove wall 241 and the second groove wall 242, and of course it can only be in contact with one of them, wherein the optimal choice is that the airbag 3 is only in contact with the first groove wall 241 , this is because the first groove wall 241 is formed to extend vertically toward the door liner 211 , and the force exerted by the airbag 3 on the first groove wall 241 has no forward component force, thus no door opening force will be generated.

As shown in Fig. 9 and Fig. 10, it is the second embodiment of the door liner 21 of the refrigerator of the present invention, the matching wall 214 has a first groove wall 241 and a second groove wall 242 which form the sealing groove 24 and are connected back and forth The first groove wall 241 is formed by extending obliquely and forwardly from the matching wall 214 toward the inner wall 115 of the liner 11 adjacent to the matching wall 214 , that is, extending obliquely forwardly toward the door liner 211 , and the second The groove wall 242 is formed to extend obliquely forward from the end of the first groove wall 241 toward the inner wall 115 of the liner 11 adjacent to the mating wall 214 .

Specifically, in this embodiment, the acute angle between the first groove wall 241 and the horizontal line along the front-back direction is greater than the acute angle between the second groove wall 242 and the horizontal line along the front-back direction. Because when the airbag 3 is sealed, the airbag 3 is in contact with both the first groove wall 241 and the second groove wall 242 .

Therefore, on the one hand, the acute angle between the first groove wall 241 and the horizontal line along the front-back direction is relatively large, and the force exerted by the airbag 3 on the first groove wall 241 has a relatively large backward force component, which can form a closed door to a certain extent. Force, prevent door body 2 from opening. On the other hand, the acute angle between the second groove wall 242 and the horizontal line along the front-back direction is small, and the forward component of the force exerted by the airbag 3 on the second groove wall 242 is small, which can reduce the door opening force to a certain extent. Combined with the fixing effect of the door seal 23, the door body 2 can be prevented from being opened under the force of the airbag 3.

Moreover, the length of the first groove wall 241 is shorter than the length of the second groove wall 242. When the door liner 21 is demoulded, since the first groove wall 241 faces away from the matching wall 214 and away from the inner container adjacent to the matching wall 214 11. The direction of the inner wall 115 is inclined to extend forward. Assume that the angle between the first groove wall 241 and the horizontal line in the lateral direction is A, and the length of the first groove wall 241 is a. Therefore, the first groove wall 241 must move in the lateral direction The distance of a×cosA can make the door liner 21 demould smoothly, and the smaller the length a of the first groove wall 241 is, the smaller the value of a×cosA is, and the easier the demoulding is.

In order to solve the problem that the airbag 3 generates a door opening force on the door lining 21, and further enable the airbag 3 to generate a door closing force on the door lining 21, the present invention also provides the following design, as shown in Figure 10, which is the door lining 21 of the refrigerator of the present invention. third embodiment.

The airbag 3 is arranged annularly in cooperation with the liner frame 212, the airbag 3 is fixedly arranged on one of the liner 11 and the liner frame 212, and the other is formed with an airbag 3 that is in contact with the airbag 3 when the door body 2 is closed. A cooperating limiting wall, the limiting wall extends from outside to inward in the lateral direction (that is, it is formed by extending obliquely and forwardly toward the direction away from the inner wall 115 of the inner tank 11 adjacent to the matching wall 214 ), and the limiting wall At the same time, the wall extends obliquely from the rear to the front. For convenience of description, the limiting wall is referred to as the first groove wall 241 below.

In this embodiment, the airbag 3 is fixed on the inner wall 115 of the liner 11 (see the aforementioned part for details), the first groove wall 241 is formed on the matching wall 214, specifically, the first groove The wall 241 can also be the matching wall 214, or a part of the structure on the matching wall 214. When the first groove wall 241 is the matching wall 214, the sealing part 22 extends from the front side of the first groove wall 241 along the transverse direction. form.

When the airbag 3 is inflated, the force exerted by the airbag 3 on the first groove wall 241 has a backward component force, which can make the door body 2 and the box body 1 fixed, that is, the door closing force. When the angle between the first groove wall 241 and the horizontal line along the front-back direction is larger, the door closing force is larger, and the fixing effect of the door body 2 is also better, but it is difficult to demould, therefore, in the actual production process , it is necessary to comprehensively balance the size of the closing force and the difficulty of demoulding to control the size of the included angle. And when the first groove wall 241 is the matching wall 214, there is no need to arrange other structures on the matching wall 214, and the design of the punch is relatively simple.

Of course, in other embodiments, the airbag 3 is fixed on the lining frame 212, and the first groove wall 241 is formed on the inner wall 115 of the liner 11. When the airbag 3 is inflated, the first groove wall 241 can prevent the airbag 3 from moving Move forward, thereby avoiding that the door body 2 is opened.

As shown in Figure 12, it is the fourth embodiment of the door liner 21 of the refrigerator of the present invention.

A sealing groove 24 matching with the airbag 3 is formed on the fitting wall 214 , and the fitting wall 214 has at least two groove walls forming the sealing groove 24 , at least one of which is the limiting wall. When the airbag 3 is inflated and inflated, it cooperates with the limiting wall to seal the storage space 12 . This is because the direction of the force generated by the airbag 3 on the limiting wall is perpendicular to the contact surface of the groove wall, therefore, the force has a backward component force, so that the door body 2 is finally closed more firmly , that is, the closing force is generated.

In this embodiment, the matching wall 214 has a spacer wall (namely the first groove wall 241 ) and a connecting wall (ie the second groove wall 242 ) forming the sealing groove 24 and connected front and back, and the spacer wall is The rear inner wall of the sealing groove 24 and the connecting wall are the front inner wall of the sealing groove 24 . For convenience of description, the limiting wall is called the first groove wall 241 , and the connecting wall is called the second groove wall 242 .

The second groove wall 242 is formed by extending obliquely from the end of the first groove wall 241 toward the inner wall 115 of the liner 11 adjacent to the mating wall 214. In this embodiment, the airbag 3 is only inflated with the second groove wall A groove wall 241 cooperates to seal the storage space 12. This is because the airbag 3 only contacts with the first groove wall 241 to ensure that only the door closing force is generated. Of course, in other embodiments, the airbag 3 can also be in contact with the second groove wall. The groove walls 242 are in contact with each other, and it only needs to ensure that the forward component force (that is, the door opening force) of the force exerted by the airbag 3 on the second groove wall 242 is smaller than the above-mentioned door closing force.

Wherein, the position of the sealing groove 24 can be formed at the middle position of the matching wall 214, of course, it can also be formed at the rear end of the matching wall 214, that is, the matching wall 214 is formed by extending from the front end of the second groove wall 242. . The former mating wall 214 has four sections of bent edges from back to front, specifically: the front mating wall 214 , the first groove wall 241 , the second groove wall 242 and the rear mating wall 214 . The latter's mating wall 214 has three sections of bent sides from back to front, specifically: the first groove wall 241 , the second groove wall 242 and the mating wall 214 . The shape of the blister punch corresponding to different bending edges is also different, which can be selected according to actual production.

In this embodiment, the length of the first groove wall 241 is greater than the length of the second groove wall 242, and the first groove wall 241 is set long enough to ensure that the airbag 3 only contacts and seals with the first groove wall 241 after inflated. , and will not contact the second groove wall 242, so that no force will be applied to the second groove wall 242, and of course no forward door opening force will be generated, therefore, only door closing force will be generated to ensure that the door body 2 is closed stronger.

The acute angle between the first groove wall 241 and the horizontal line along the front-back direction is smaller than the acute angle between the second groove wall 242 and the horizontal line along the front-back direction. Make the angle between the first groove wall 241 and the horizontal line in the front-back direction as small as possible, and tend to be more parallel to the horizontal line in the front-back direction, so that in the demoulding process, the resistance is smaller and the demoulding is easier ,Increase productivity.

In other words, that is, the angle between the first groove wall 241 and the horizontal line in the lateral direction is relatively large. Similarly, assuming that the angle between the first groove wall 241 and the horizontal line in the lateral direction is A, the length of the first groove wall 241 is a, therefore, the first groove wall 241 must move a distance of a×cosA along the lateral direction, so that the door liner 21 can be demoulded smoothly, then the larger the value of the included angle A, the smaller the value of a×cosA, then It also makes the door liner 21 easier to demould.

In order to further enhance the airbag 3 to generate a closing force on the door lining 21, as shown in FIG. 13, it is the fifth embodiment of the door lining 21 of the refrigerator of the present invention.

The matching wall 214 has a limiting wall and a connecting wall that form the sealing groove 24 and are connected back and forth, (for convenience of description, the limiting wall and the connecting wall are still referred to as the first groove wall 241 and the second groove wall 242 ), the first groove wall 241 is formed by extending from the mating wall 214 toward the direction away from the inner wall 115 of the liner 11 adjacent to the mating wall 214, and the second groove wall 242 is formed from the end of the first groove wall 241 toward The inner wall 115 of the liner 11 adjacent to the matching wall 214 is formed to extend obliquely forward. After the airbag 3 is inflated, it cooperates with the first groove wall 241 and the second groove wall 242 to seal the storage space 12 .

In this embodiment, the sealing groove 24 is formed by being recessed from the middle position of the fitting wall 214, and the fitting wall 214 extends obliquely from the back to the front and toward the inner wall 115 of the inner container 11, therefore, the fitting wall 214 also has Form the front wall of the sealing groove 24, the front wall is connected to the front end of the second groove wall 242, for the convenience of description, the following front wall is called the third groove wall 243, and the third groove wall 243 starts from the first groove wall 243. The end of the second groove wall 242 extends forward and obliquely toward the inner wall 115 of the liner 11 adjacent to the matching wall 214 , and is connected to the matching wall 214 at the front end.

In this embodiment, when the airbag 3 is inflated, it only contacts the first groove wall 241 and the second groove wall 242, but does not contact the third groove wall 243, and the third groove wall 243 is mainly used for connecting Therefore, the matching wall 214 at the front end also does not generate a door opening force, but only generates a door closing force to ensure that the door body 2 is closed more firmly. Of course, in other embodiments, the airbag 3 can also be in contact with the third groove wall 243 after being inflated, and it is only necessary to ensure that the forward component of the force of the airbag 3 on the third groove wall 243 (that is, the door opening force) is smaller than that of the first groove. The closing force generated by the wall 241 and the second groove wall 242 is sufficient.

In this embodiment, the acute angle between the first groove wall 241 and the horizontal line along the front-back direction is greater than the acute angle between the second groove wall 242 and the horizontal line along the front-back direction.

Because when the airbag 3 is sealed, the airbag 3 is in contact with the first groove wall 241 and the second groove wall 242, therefore, on the one hand, the acute angle between the first groove wall 241 and the horizontal line along the front-to-back direction is relatively large, and the airbag 3 gives The force of the first groove wall 241 has a larger component in the backward direction, which can prevent the door body 2 from opening to a certain extent. It can also be understood that the greater the angle of the first groove wall 241, the better the holding effect on the airbag 3 .

On the other hand, the acute included angle between the second groove wall 242 and the horizontal line along the front-to-back direction is small, which can facilitate the setting of the second groove wall 242 longer, thereby increasing the contact area with the airbag 3. Small, when demolding, the clamping force between the second groove wall 242 and the punch is also smaller, so it is easier to realize demoulding. Therefore, in principle, it is only necessary to ensure that the angle between the second groove wall 242 and the horizontal line along the front-back direction is sufficient, and the smaller the better, the existence of the angle ensures the generation of closing force, and the smaller the angle, the easier it is to realize the door-closing force. mold.

Moreover, the length of the first groove wall 241 is shorter than the length of the second groove wall 242. On the one hand, because the acute angle between the first groove wall 241 and the horizontal line along the front-to-back direction is relatively large, the first groove wall 241 is set shorter. Some, so that when demoulding, the area of the first groove wall 241 holding the punch is smaller, which is more conducive to demoulding. On the other hand, the second groove wall 242 is set longer, so that the airbag 3 is mainly sealed with the second groove wall 242 after inflated, and the first groove wall 241 assists in holding the airbag 3 .

Wherein, due to the third to fifth embodiments of the door liner 21 of the refrigerator of the present invention, it can already generate the closing force by itself, that is, there is no need to set additional fixing devices to fix the door body 2 and the box body 1. Therefore, the door seal There is no need to install magnetic elements in 23. Since there are no magnetic elements, on the one hand, the cost increase can be reduced; The air in the storage space 12 performs heat exchange, so that the temperature in the storage space 12 rises slowly, thereby improving the heat preservation and sealing effect.

As shown in Figure 7 and Figure 8, it is another embodiment of the refrigerator airbag of the present invention, the airbag 3 has an inner airbag 31, an outer airbag 32 arranged outside the inner airbag 31, and a fixing part for fixing to the inner container 11 42.

In this embodiment, the outer airbag 32 can be integrally formed with the fixing portion 42 , and of course, it can also be assembled. The outer airbag 32 also has an installation port for installing the inner airbag 31 to its inside, the inner bag 11 is recessed with a groove 111 for accommodating the airbag 3, and the bottom of the groove 111 is further recessed with the fixed In this embodiment, the fixing part 42 is arranged in a triangular shape, but of course it can also be in other shapes. When the airbag 3 is installed, since the inner tank 11 is made of plastic material and has good elasticity, the fixing part 42 can be directly installed to the fixing groove by overcoming the elastic force of the inner tank 11 without worrying about the inner tank 11 being damaged.

When the airbag 3 is not inflated, the airbag 3 shrinks in the groove 111 and is semicircular, so that the door body 2 can be opened and closed smoothly, and the surface area of the inner airbag 31 is greater than the surface area of the outer airbag 32, that is, The inner airbag 31 is arranged in the outer airbag 32 in the form of multi-layer folds. When the inner airbag 31 is inflated, due to the larger surface area of the inner airbag 31, when the door is closed, the larger the area is under the same pressure, the greater the resulting pressure. The greater the pressure, therefore, the better the sealing effect.

In the state of opening the door, the outer wall of the outer airbag 32 adjacent to the lining frame 212 is flush with the inner wall 115 of the liner 11, that is, the inner airbag 31 is not inflated and the outer airbag 32 is in an undeformed state. state. At this time, the door body 2 can be opened and closed smoothly without being interfered by the outer air bag 32 .

In this embodiment, the elastic modulus of the outer air bag 32 is smaller than the elastic modulus of the inner air bag 31, and the greater the elastic modulus, the greater the rigidity, that is to say, the less likely to deform. Therefore, the outer air bag 32 is easier to deform than the inner airbag 31, that is, as long as the inner airbag 31 exerts force on the outer airbag 32, the outer airbag 32 will immediately deform.

On the one hand, it is easy to control the inflation amount of the inner airbag 31 , on the other hand, it is also possible to avoid excessive inflation of the inner airbag 31 and damage to the inner airbag 31 . Moreover, the outer airbag 32 is made of wear-resistant material, so that even during long-term use, the outer airbag 32 is not easily damaged by friction with the lining frame 212 .

In this embodiment, the matching wall 214 is arranged to extend obliquely from the back to the front and toward the inner wall 115 of the inner container 11, which is to facilitate the demoulding of the door liner 21 from the blister punch. Of course, in other embodiments, The matching wall 214 can also be extended in a direction perpendicular to the door liner 211. In order to further strengthen the sealing effect of the air bag 3, the matching wall 214 is also concavely provided with a hole that matches the air bag 3. Seal groove 24. By setting the sealing groove 24, the sealing area of the airbag 3 is increased, on the one hand, the sealing effect is increased; The forward force component prevents the door body 2 from opening.

Specifically, the matching wall 214 has at least two groove walls forming the sealing groove 24, the more groove walls forming the sealing groove 24, the larger the area sealed with the airbag 3, the better the sealing effect, and the friction force is also lower. The bigger it is, the more difficult it is for the door body 2 to be opened.

As shown in Figure 14 and Figure 15, in order to further improve the sealing effect and reduce the heat exchange efficiency, the air pump 5 of the refrigerator of the present invention fills the air bag 3 by sucking in relatively cold gas from the inside of the refrigerator, so that the temperature in the air bag 3 and the storage space The temperature difference of 12 is small, even lower than the temperature in the storage space 12, thereby reducing the heat exchange and keeping the temperature in the storage space 12 in a relatively stable state.

Specifically, as shown in FIG. 1 , the refrigerator includes an evaporation chamber 15 located at the rear side of the storage space 12, an evaporator 16 located in the evaporation chamber 15, and an evaporator located between the storage space 12 and the evaporation chamber 15. The air duct cover plate 17, the air pump 5 matched with the air bag 3, the air guide pipe 6 connected between the air bag inlet and the air pump charging port, the air pump 5 has the function of sucking air from the evaporation chamber 15 or the storage space 12 With the suction port that air bag 3 is inflated.

In this embodiment, the air pump 5 is arranged in the evaporation chamber 15. Generally, the temperature in the evaporation chamber 15 is lower than the temperature in the storage space 12. Therefore, the air pump 5 sucks air from the evaporation chamber 15 and fills it into the airbag 3, so that the temperature of the air in the airbag 3 is lower than the temperature in the storage space 12, reducing heat exchange and improving the sealing effect.

The air duct cover plate 17 has an air outlet 171 and an air return port 172 arranged opposite to each other front and rear or left and right. In this embodiment, the air outlet 171 and the air return port 172 are arranged opposite to each other. The evaporator 16 is arranged between the air outlet 171 and the return air outlet 172, and the air pump 5 is arranged between the air outlet 171 and the evaporator 16, that is, the air pump 5 is arranged on the air duct cover plate 17 on the side of the air outlet 171 , the evaporator 16 and the inner tank 11 surrounded by the formed space.

Therefore, on the one hand, disposing the air pump 5 in the evaporation chamber 15 can make full use of the space of the evaporation chamber 15, save the space of the storage space 12, and form a hidden design, which is more beautiful. On the other hand, the gas sucked by the air pump 5 is a low-temperature and low-humidity gas cooled by the evaporator 16. When the gas is filled into the air pump 5, since the temperature and humidity are low enough, it is not easy to precipitate liquid water, thereby reducing the In addition, the air pump 5 is a low temperature resistant air pump 5. In summary, the air pump 5, the air guide tube 6 and the air bag 3 can work for a long time without damage.

Of course, the air pump 5 and the air guide tube 6 can also be arranged in the storage space 12. Preferably, the air pump 5 is arranged on the rear side of the storage space 12, so that when the door 2 is opened, it is difficult for the user to see. The air guide tube 6 can extend back and forth along the inner wall 115 of the inner bag 11 to connect with the airbag inflation port, and the air guide tube 6 can be fixed by the fixing clip 9 . Or the outer side of air pump 5 and air guide tube 6 is provided with the protective cover of plastic material identical with inner bag 11 colors.

The refrigerator also includes a three-way valve 7 connected between the air guide tube 6 and the charging port of the air pump 5. The three-way valve 7 has a first opening 71 connected to the air pump charging port, a second opening 72 connected to the air guide tube 6, The third opening 73 for the exhaust of the airbag 3, the third opening 73 is provided with a solenoid valve, when the airbag 3 is inflated, the solenoid valve is closed, when the airbag 3 is exhausted, the solenoid valve is opened to exhaust through the third opening 73 .

By arranging the three-way valve 7 and controlling the opening and closing of the electromagnetic valve to further control the inflation and deflation of the airbag 3, it is only necessary to set the inflation port on the airbag 3, and there is no need to arrange an exhaust port, so that the structure of the airbag 3 is relatively simple. It is also convenient to be installed in the groove 111 of the liner 11 .

The air guide tube 6 includes a first air guide tube 61 connected to the inflation port of the air pump 5 and a second air guide tube 62 connected to the air inlet of the airbag 3. The first opening 71 and the second opening 72 of the three-way valve 7 are respectively connected to Between the first air duct 61 and the second air duct 62, the three-way valve 7 is arranged on the rear side of the air duct cover 17, that is, the three-way valve 7 is fixed on the air duct cover 17, and the first Three openings 73 pass through the air duct cover plate 17 and communicate with the storage space 12 . By arranging two air guide pipes 6 , it is convenient for the three-way valve 7 to be fixed on the air duct cover plate 17 , and it is also convenient for the third opening 73 to communicate with the storage space 12 .

On the one hand, the hidden design of the three-way valve 7 is realized to save the space of the storage space 12; How much gas is in the body 1, after the air bag 3 is deflated, the total amount of gas in the box body 1 remains unchanged, thereby avoiding negative pressure and ensuring the normal opening of the door body 2.

Of course, in other embodiments, the third opening 73 of the three-way valve 7 can also communicate with the evaporation chamber 15, so as to discharge the gas in the airbag 3 into the evaporation chamber 15, because the evaporation chamber 15 and the storage space 12 is generally connected through the air return port 172, therefore, negative pressure can also be avoided.

In this embodiment, the refrigerator also has a fixing frame 8 arranged on the rear side wall of the inner container 11, which is used to fix the air pump 5. Therefore, the air pump 5 is arranged on the rearmost side of the inner container 11 to ensure It is farthest away from the storage space 12, and the vibration generated by the air pump 5 has relatively little impact on the storage space 12. In addition, in order to reduce the vibration and noise generated by the air pump 5, it can also be coated on the outside of the air pump 5. Sound-absorbing and shock-absorbing material.

The refrigerator also has a through hole (not shown) that runs through the bottom wall of the groove 111 to communicate with the foam layer, and the air guide tube 6 is arranged in the foam layer and is connected to the air bag 3 air inlet through the through hole, for Ensure that the airbag 3 inflation port is sealed and connected with the air guide tube 6, and the front side of the air guide tube 6 can also be provided with an air nozzle, and the air bag 3 inflation port and the air nozzle can be fixed together through internal and external threads that cooperate with each other. Alternatively, the air guide tube 6 is directly connected to the inflation port of the airbag 3, and a separate sealing member is provided on the outside to prevent the airbag 3 from leaking.

The other end of the air guide tube 6 is connected to the three-way valve 7 in the evaporation chamber 15. Also to ensure the sealing between the air guide tube 6 and the three-way valve 7, the structure of the air guide tube 6 and the air bag 3 inflation port can be referred to above. In this embodiment, in order to prevent the air duct 6 from being bent and inflate the air bag 3 smoothly, the refrigerator also has a plurality of fixing clips 9 arranged at intervals along the front and rear directions to fix the air duct 6. Of course, in other embodiments, Embedded parts extending along the front and rear directions can be provided on the foam layer so as to install the air guide tube 6, and the air guide tube 6 is not easy to bend.

To sum up, the air pump 5 , the air guide tube 6 and the three-way valve 7 of this embodiment are all hidden designs, which improves the overall aesthetics and increases the volume ratio of the storage space 12 .

To sum up, the control method of the refrigerator of the present invention pre-inflates the air bag 3 to the preset pressure after the door body is opened, and continues to inflate the air bag 3 after the door body 2 is closed, from the preset pressure to the sealing pressure. The inflation time of the airbag 3 is greatly shortened. The heat exchange between the storage space 12 and the surrounding environment is reduced, the sealing rate is improved, and the heat preservation effect is enhanced.

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. A control method of a refrigerator is characterized in that: the refrigerator has a normal air-filling mode and a quick air-filling mode, and the control method comprises the following steps:

acquiring the ambient temperature T of the refrigerator, comparing the ambient temperature T with a preset temperature T0, starting a rapid inflation mode when the T is more than or equal to the T0, and otherwise, starting a common inflation mode;

the rapid inflation mode specifically includes: the method comprises the steps of obtaining door body opening information, inflating a sealing air bag between a refrigerator body and a door body after the door body is opened, obtaining pressure p1 in the sealing air bag, and stopping inflating when the pressure p1 reaches preset pressure p 2;

and acquiring door closing information, and continuously inflating the sealed air bag after the door is closed until the pressure p1 in the sealed air bag reaches the sealing pressure p3.

2. The control method of a refrigerator as claimed in claim 1, wherein: the critical pressure of the sealed air bag in the expansion deformation and the non-deformation is p4, and p4 is multiplied by 80% < p2 < p4.

3. The control method of a refrigerator as claimed in claim 1, wherein: the fast inflation mode further comprises: and after the door body is opened, inflating a sealing airbag between the refrigerator body and the door body, acquiring the opening time t1 of the door body, comparing p1 with p2 when the opening time t1 reaches the preset time t0, and continuing inflating until p2 is reached when p1 is less than p2.

4. The control method of a refrigerator as claimed in claim 1, wherein: the common inflation mode includes: and acquiring door opening information, controlling the sealed air bag to exhaust completely, acquiring door closing information when the door is closed, and inflating the sealed air bag to enable the pressure p1 to rise from 0 to the sealing pressure p3.

5. The control method of a refrigerator as claimed in claim 1, wherein: the critical pressure when the sealing air bag is inflated to just generate acting force on the door body or the box body is p5, and p5 is more than p3 and more than p5 multiplied by 120 percent.

6. The control method of a refrigerator as claimed in claim 1, wherein: the refrigerator is including the box that has the inner bag, with the box complex door body, the door body has the door lining, form storing space between door lining and the inner bag, the door lining has the door lining board and extends the inboard lining frame of inner bag backward suddenly from the door lining board, sealed gasbag sets up between inner bag and lining frame with sealed storing space, the refrigerator is still including fixed sealed gasbag's mounting, with sealed gasbag matched with air pump, the mounting has covers in the sealed gasbag outside and fills out deformation portion of gassing elastic deformation along with sealed gasbag, links to each other with deformation portion in order to fix to the fixed part on inner bag or the lining frame.

7. The control method of a refrigerator as claimed in claim 6, wherein: the sealing air bag is fixed on the inner container, a groove and a fixing structure are formed in the position, adjacent to the lining frame, of the inner container, the sealing air bag is contained in the groove, and the fixing piece is fixed outside the sealing air bag through the matching of the fixing portion and the fixing structure.

8. The control method of a refrigerator of claim 7, wherein: the liner is provided with an inner wall adjacent to the lining frame, and the outer wall of the fixing piece adjacent to the lining frame is flush with the inner wall of the liner in a door opening state.

9. The control method of a refrigerator as claimed in claim 7, wherein: the inner container is provided with an inner container body and a connecting piece fixed at the front end of the inner container body, and the groove and the fixing structure are formed on the connecting piece.

10. The control method of a refrigerator as claimed in claim 6, wherein: the lining frame is provided with a matching wall matched with the sealing air bag, and the matching wall is concavely provided with a sealing groove matched with the sealing air bag.

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