CN112212559B

CN112212559B - Refrigerator with a door

Info

Publication number: CN112212559B
Application number: CN201910626130.9A
Authority: CN
Inventors: 孙兴华; 黄瑞雪; 林超; 程文强; 王克强; 刘张稳; 张忠举; 马丁; 秦楠; 唐帅; 赵丛印
Original assignee: Qingdao Zhidong Seiko Electronic Co ltd
Current assignee: Qingdao Zhidong Seiko Electronic Co ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2022-02-18
Anticipated expiration: 2039-07-11
Also published as: CN112212559A

Abstract

The invention discloses a refrigerator. The refrigerator includes: the display device comprises a metal panel, a display screen and a display screen, wherein the metal panel is provided with a display window; the circuit board is positioned in the display window, and a ground plane and a feed position are arranged on the circuit board; at least two antenna pressing sheets, wherein one end of at least one antenna pressing sheet is connected with the grounding surface, and the other end of at least one antenna pressing sheet is connected with the metal panel; one end of at least one antenna pressing sheet is connected with the feed potential, and the other end of the antenna pressing sheet is connected with the metal panel. The embodiment of the invention improves the stability of wireless communication signals.

Description

Refrigerator with a door

Technical Field

The present disclosure relates to a refrigerator, and more particularly, to a refrigerator.

Background

At present, the intelligent refrigerator can be regulated and controlled by receiving wireless communication signals, a user can output the wireless communication signals for regulating and controlling the intelligent refrigerator through a mobile terminal, and the intelligent refrigerator can be regulated and controlled according to the wireless communication signals, so that the intelligent refrigerator is convenient for the user to use.

In the related art, as shown in fig. 1, the wireless communication module 10 is generally disposed on the top of the refrigerator and separated from the display panel 20 of the refrigerator, the wireless communication module 10 is connected to the display panel 20 through a cable, and the display panel 20 is used to communicate with the main controller of the refrigerator, that is, the display panel 20 is a relay station for connecting the main controller and the wireless communication module. However, the function of the general display panel is relatively single, the control unit inside the general display panel is relatively simple, a single chip microcomputer is often adopted, and the wireless communication module 10 generally adopts a kernel controller, so that the signal channel is reduced when the wireless communication signal received by the wireless communication module 10 is transmitted to the main MCU through the display panel 20, which results in a relatively slow processing speed; and the signal that the control unit of display panel produced can cause certain interference to the wireless communication signal to influence the stability of wireless communication signal, the condition that can even appear data loss.

Disclosure of Invention

The present disclosure provides a refrigerator to improve stability of a wireless communication signal.

In a first aspect, the present disclosure provides a refrigerator comprising:

the display device comprises a metal panel, a display screen and a display screen, wherein the metal panel is provided with a display window;

the circuit board is positioned in the display window, and a ground plane and a feed position are arranged on the circuit board;

at least two antenna pressing sheets, wherein one end of at least one antenna pressing sheet is connected with the grounding surface, and the other end of at least one antenna pressing sheet is connected with the metal panel; one end of at least one antenna pressing sheet is connected with the feed potential, and the other end of the antenna pressing sheet is connected with the metal panel.

Optionally, the area of the circuit board is smaller than the area of the display window.

Optionally, a gap is formed between the outer edge of the ground plane and the inner edge of the display window, and at least two antenna patches are arranged on the gap at intervals to form an antenna radiation slot region.

Optionally, the distance between any two antenna patches is half of the corresponding antenna wavelength; the width of the gap is 1 mm-10 mm.

Optionally, the ground plane is provided with a gap at the feed potential; at least one antenna pressing sheet is inserted into the notch and connected with the feed position.

Optionally, the ground plane on the circuit board has a hollow area, and the wireless communication circuit is located in the hollow area.

Optionally, the method further includes: the display screen is located in the display window and electrically connected with the circuit board, and the circuit board is located on the inner side of the display screen.

Optionally, the device further comprises a cover plate and a rear cover; the cover plate is clamped on the circuit board through a clamping piece and covers the display window; the rear cover is positioned on one surface of the circuit board far away from the display screen.

Optionally, one end of the at least two antenna pressing sheets, which is far away from the circuit board, is clamped between the rear cover of the display module and the metal panel, so that the at least two antenna pressing sheets are respectively abutted to the metal panel.

Optionally, one end of at least two of the antenna patches, which is far away from the circuit board, is in a sawtooth shape.

The refrigerator provided by the embodiment of the disclosure comprises: the display device comprises a metal panel, a display screen and a display screen, wherein the metal panel is provided with a display window; the circuit board is positioned in the display window, and a ground plane and a feed position are arranged on the circuit board; at least two antenna pressing sheets, wherein one end of at least one antenna pressing sheet is connected with the ground plane, and the other end of the at least one antenna pressing sheet is connected with the metal panel; one end of at least one antenna pressing sheet is connected with a feed potential, and the other end of the antenna pressing sheet is connected with the metal panel. Because the refrigerator has metal decking, a plurality of antenna preforming metal decking, circuit board looks butt respectively to, antenna preforming and metal decking form the antenna radiation body jointly, make wireless communication circuit's wireless communication signal reception range and transmission range enlarge, avoid metal decking to wireless communication signal's shielding effect, and then improve wireless communication signal's stability.

Drawings

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

Fig. 1 is a front view of a related art refrigerator.

Fig. 2 is a front view of the refrigerator of the present disclosure.

Fig. 3 is an exploded view of the refrigerator of the present disclosure.

Fig. 4 is a schematic view of the backside structure at a in fig. 2.

Fig. 5 is an exploded view of a display module of the present disclosure.

Fig. 6 is a schematic partial structure diagram of a display module according to another embodiment of the present disclosure.

Fig. 7 is a partially enlarged view at B in fig. 4.

Fig. 8 is a partial sectional view taken along direction C in fig. 4.

Fig. 9 is a schematic structural view of a refrigerator of the present disclosure.

Fig. 10 is a schematic structural diagram of an antenna wafer of a refrigerator according to the present disclosure.

Fig. 11 is a schematic view of the radiation principle of a plate-shaped symmetric array antenna.

Fig. 12A is an E-plane pattern radiated by the antenna of the present disclosure.

Fig. 12B is an H-plane pattern radiated by the antenna of the present disclosure.

Fig. 13 is a test chart of standing wave ratio of antenna radiation of the refrigerator of the present disclosure.

Description of reference numerals:

100. a refrigerator; 1. a refrigerator main body; 2. a metal panel; 21. displaying a window; 22. bending edges; 221. a through hole;

3. a display module; 31. a circuit board; 311. a ground plane; 3111. a notch; 312. feeding a potential; 313. a side edge; 314. welding a disc; 32. a display circuit; 33. a wireless communication circuit; 34. a display screen; 35. a rear cover; 351. heat dissipation holes; 36. a cover plate;

4. an antenna pressing sheet; 41. an antenna wafer main body; 42. a first connection end; 43. a second connection end; 5. an antenna pressing sheet;

6. a gap; 61. the antenna radiates the slot area.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terms "including" and "having," and any variations thereof, in the description and claims of this disclosure and the drawings described herein are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

In the related art, as shown in fig. 1, a wireless communication module 10 is generally disposed at the top of a refrigerator and separated from a display panel 20 of the refrigerator, the wireless communication module 10 is connected to the display panel 20 through a cable, a signal generated by a control unit of the display panel may cause certain interference to a wireless communication signal, thereby affecting stability of the wireless communication signal, in addition, a cable connection between the display panel and the wireless communication module is realized through a manual assembly manner, and the cable is easily dropped when vibrating (for example, vibration caused by operation of a motor when the refrigerator operates), so that the cable is in poor contact with the display panel or the wireless communication module, thereby causing instability of the wireless communication signal.

In order to solve the above problems, the inventor proposes a new scheme, which utilizes a kernel controller of a wireless communication module to control a wireless communication function and a touch and display function of a display panel, integrates the wireless communication function and the display into a whole, changes the position of the wireless communication module from the top of a refrigerator into a PCB integrated with the display panel, and places the wireless communication module inside the refrigerator, thereby improving the processing speed of a main controller of the refrigerator on the control of the display panel, and enhancing the signal stability of the wireless communication module.

However, when the wireless communication module is placed inside the refrigerator, the following problems will be encountered:

1. the refrigerator body is made of non-metal materials except for the display panel area, the periphery of the refrigerator body is made of metal materials, and the outward radiation space of the wireless communication module antenna is small, so that the electromagnetic wave radiation energy loss is realized.

2. The receiving sensitivity of the wireless communication module antenna is interfered by the metal material of the refrigerator.

3. The directional pattern of the wireless communication module antenna is affected and the omnidirectional radiation performance is poor.

Therefore, according to the scheme in the disclosure, the metal panel of the refrigerator is used as a part of the antenna, and the slot antenna is designed to solve the interference problem. The energy of the wireless communication module antenna radiates outwards through the gap, and the omni-directionality of the antenna is improved.

The refrigerator in the present disclosure may perform Wireless communication with an electronic device such as a mobile phone, for example, Wireless communication through Wireless Fidelity (WIFI), bluetooth, ZigBee, or narrowband internet of things NB-IOT.

The technical solution of the present disclosure is explained in detail by specific examples below. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

As shown in fig. 2 and 3, the present disclosure provides a refrigerator 100. The refrigerator mainly comprises a refrigerator main body 1, a metal panel 2, a display module 3 and at least two antenna sheets (two

antenna sheets

4 and 5 are shown in the figure, and the two antenna sheets are taken as an example for explanation below). The metal panel 2 is covered on the front side of the refrigerator main body 1, and the metal panel 2 is provided with a display window 21. The display module 3 comprises a circuit board 31, a display circuit 32, a wireless communication circuit 33, a display screen 34, a cover plate 36 and a rear cover 35, the display circuit 32 and the wireless communication circuit 33 are integrated in the display module 3, the display module 3 is fixedly arranged on the inner side of the metal panel 2, and the display circuit 32 and the wireless communication circuit 33 are arranged on the circuit board 31 and face the display window 21. The cover plate 36 is clamped on the circuit board 31 through a clamping piece and is covered on the display window 21; the rear cover 35 is located on a side of the circuit board 31 away from the display screen 34. Display module 3 is connected to the one end of antenna preforming 4 and antenna preforming 5, metal panel 2 is connected to the other end, through antenna preforming 4 and antenna preforming 5, display module 3 and metal panel 2 constitute antenna radiation body jointly, receive or launch wireless communication signal for wireless communication circuit 33, metal panel 2 is as the component part of antenna, metal panel 2 has been avoidd the shielding effect to wireless communication signal, thereby reduce the interference of metallic environment to wireless communication signal, and then improve wireless communication signal's stability.

The refrigerator main body 1 is a main structure of the refrigerator 100, and may generally include a compressor, a temperature controller, a high-low pressure pipe, a box body, an inner container, and the like, and an electrical box is generally further provided in the box body of the refrigerator main body 1, and a main controller and other necessary electrical components are installed in the electrical box.

The main controller is configured to receive a control signal from a user to the refrigerator 100 and control operations of various components in the refrigerator 100. In addition, the main controller may also control the display module to display the use state (e.g., operation mode, set temperature, etc.) of the refrigerator 100 based on the user's demand.

For the refrigerator 100 with the wireless communication function in this embodiment, the control signal of the user to the refrigerator 100 may be a signal triggered by the user touching the display screen, or may be a wireless communication signal output by the cloud platform after the user operates the refrigerator through an intelligent electronic device (e.g., a smart phone).

Further, the metal panel 2 is fixed to the refrigerator body 1 by screwing or fastening.

As shown in fig. 2, in the present embodiment, the position of the display window 21 on the metal panel 2 is generally located at the middle upper portion of the refrigerator, but the position of the display window 21 is not limited thereto. The display window 21 of the metal panel 2 may be rectangular in shape, wherein the long side of the display window 21 coincides with the longitudinal direction of the metal panel 2.

Fig. 4 is a schematic view of the backside structure at a in fig. 2. Fig. 5 is an exploded view showing a partial structure of a module. The orientation of the display module in fig. 4 does not correspond to that in fig. 2.

As shown in fig. 2, 4 and 5, the display module 3 may be fixed on the refrigerator main body 1, for example, by fastening or bolting, and the installation position of the display module 3 on the refrigerator main body 1 is opposite to the display window 21 of the metal panel 2, so as to realize that the display module 3 is fixed on the inner side of the metal panel 2. In another embodiment, the display module 3 may be directly fixed to the metal panel 2, for example, by a connection structure provided inside the metal panel 2.

In the display module 3, the display circuit 32 and the wireless communication circuit 33 are disposed on the same circuit board 31 and electrically connected to each other through the internal circuit of the circuit board 31, so that the display circuit 32 and the wireless communication circuit 33 are integrated on the same circuit board 31, thereby eliminating the influence of cable connection on the display circuit 32 and the wireless communication circuit 33 and ensuring the stability of wireless communication signals. The display panel 34 is electrically connected to the circuit board 31 and the display circuit 32, and the display panel 34 displays a display signal according to the display signal output by the display circuit 32, so as to display a use state (such as an operation mode, a set temperature, etc.) of the refrigerator 100. The display screen 34 is electrically connected to the circuit board 31 by plugging, or electrically connected to the circuit board 31 by a flat cable, which is not limited in the present disclosure.

The circuit board 31 may be a single-sided board, a double-sided board or a multi-layered board, and the circuit board 31 is fixed on the inner side of the metal panel 2. The circuit board 31 is substantially rectangular and is fitted to the display window 21. The circuit board 31 is provided with a ground plane 311 and a feeding potential 312 on a surface facing away from the metal panel 2. The ground plane 311 is exposed on the surface of the metal panel 2 and can be used to communicate other components with the circuit board 31, so as to electrically connect other components with the circuit board 31. The feed 312 is mainly used for connecting the antenna and the signal emitter, and the antenna is connected with the signal emitter by connecting the feed 312, so that the signal emitter effectively transmits signals to the antenna.

The cover plate 36 is clamped on the circuit board 31 through a clamping piece 361.

Fig. 6 is a partial view of a circuit board. Fig. 7 is a partially enlarged view at B in fig. 4.

Referring to the view direction of fig. 4 in conjunction with fig. 6 and 7, the ground plane 311 is located on the right half of the circuit board 31, a gap 6 is provided between the outer edge of the ground plane 311 and the inner edge of the display window 21, and the antenna pellet 4 and the antenna pellet 5 are spaced apart from each other in the gap to form an antenna radiation slot region.

Further, as shown in fig. 7, a notch 3111 is disposed at a lower right portion of the ground plane 311, and the notch 3111 is disposed at a right position of the circuit board 31 and penetrates through a lower edge of the circuit board 31. At least one antenna patch (e.g., antenna patch 5) is inserted through the gap and connected to the feeding potential 312. Further, the side edge of the ground plane 311 may be flush with the side edge 313 of the circuit board 31. The feeding potential 312 is disposed in an area enclosed by the ground plane 311 and is disposed corresponding to the notch 3111, and the feeding potential 312 is disposed near the right of the circuit board 31.

The wireless communication circuit 33 may be a wireless communication module having a function of processing a wireless communication signal and outputting the wireless communication signal, the wireless communication circuit 33 has a kernel controller for wireless communication signal operation, and the wireless communication circuit 33 is mainly used for receiving and transmitting the wireless communication signal. The wireless communication signals received or transmitted by the wireless communication circuit 33 can be applied to wireless transmission technologies such as WIFI, bluetooth, zigbee enb-IOT, and the like.

Further, as shown in fig. 4, the ground plane 311 on the circuit board has a hollow area, and the wireless communication circuit 33 is located in the hollow area.

The wireless communication circuit 33 is disposed on a side of the circuit board 31 close to the metal panel 2, and is mounted on the circuit board 31 opposite to a hollow area enclosed by the ground plane 311. The wireless communication circuit 33 is electrically connected to the ground plane 311 and the feeding potential 312. Further, in this embodiment, the core controller of the wireless communication circuit 33 can process the display signal, so as to control the display circuit 32 and further control the display of the display screen 34.

The display circuit 32 may not be provided with a core controller for operation, but may be controlled by the wireless communication circuit 33. Because the display circuit 32 is not provided with a kernel controller for operation, the display circuit 32 does not generate a signal which causes interference to the wireless communication signal, and the stability of the wireless communication signal is ensured. The display circuit 32 is disposed on a side of the circuit board 31 close to the metal panel 2, and is on the same side as the wireless communication circuit 33. The display circuit 32 is located in the left half of the circuit board 31.

The display panel 34 is electrically connected to the circuit board 31 and the display circuit 32, and displays the usage status (e.g., operation mode, set temperature, etc.) of the refrigerator 100 according to the display signal output by the display circuit 32 through the display panel 34. The display screen 34, the wireless communication circuit 33, and the display circuit 32 all face the display window 21. In addition, the display module 3 further includes a signal transmission line (not shown), one end of the signal transmission line (not shown) is electrically connected to the wireless communication circuit 33, and the other end of the signal transmission line (not shown) is electrically connected to the main controller of the refrigerator main body 1. The wireless communication circuit 33 is directly connected to the main controller for communication without passing through the display circuit 32, and meanwhile, a signal channel (for example, 32bit) of the wireless communication circuit 33 is larger than a signal channel (for example, 8bit) of a conventional display panel, so that the wireless communication signal channel is enlarged, and the processing speed of the wireless communication signal is further improved.

Fig. 8 is a partial sectional view taken along direction C in fig. 4.

Further, referring to fig. 3 and 8, the display module 3 may further include a back cover 35 and a cover plate 36, the cover plate 36 is fastened to the back cover 35 and forms an inner cavity, and the cover plate 36 is disposed on a side of the back cover 35 close to the metal panel 2. The circuit board 31 and the display circuit 32 and the wireless communication circuit 33 are accommodated in the inner cavity. One side of the rear cover 35 close to the circuit board 31 is provided with a plurality of heat dissipation holes 351, and the plurality of heat dissipation holes 351 are uniformly arranged. The heat dissipation holes 351 are substantially rectangular, and the heat dissipation holes 351 facilitate air convection, thereby accelerating heat dissipation of the circuit board 31 and prolonging the service life of the circuit board 31.

Referring to fig. 4 and 8, the

antenna patches

4 and 5 are disposed at intervals along the side edge 313 of the circuit board 31, or the

antenna patches

4 and 5 are disposed at intervals along the long side of the display window 21. The antenna pad 4 and the antenna pad 5 are made of conductive material, wherein one end of the antenna pad 4 is connected to the ground plane 311, and the other end is connected to the metal panel 2. One end of the antenna sheet 5 is connected to the feeding potential 312, and the other end is connected to the metal panel 2.

Further, the antenna sheet 4 includes an antenna sheet main body 41, a first connection end 42 bent and extended from one end of the antenna sheet main body 41, and a second connection end 43 bent and extended from the other end of the antenna sheet main body 41. The antenna pellet body 41 extends from the circuit board 31 toward the display window 21, the first connection end 42 is connected to the circuit board 31, and the second connection end 43 is connected to the metal panel 2. The antenna pressing sheet 4 is integrally formed by bending. The antenna pellet 5 is similar in structure to the antenna pellet 4 and will not be described herein.

As shown in fig. 4 and 7, the first connection end 42 is attached to the circuit board 31. The first connecting end 42 of the antenna wafer 4 is attached to the side edge of the ground plane 311, and the first connecting end of the antenna wafer 5 is inserted into the notch 3111 of the ground plane 311 and connected to the feeding position 312, so that the two antenna wafers are more compact in structure.

As shown in fig. 8, the second connection end 43 of the antenna pad 4 is attached to the inner wall of the metal panel 2 and extends to the metal panel 2.

As shown in fig. 8, the ends of the

antenna pads

4 and 5 far from the circuit board are sandwiched between the rear cover 35 of the display module and the metal panel 2, so that the

antenna pads

4 and 5 are respectively abutted against the metal panel 2.

Referring to fig. 9, in another embodiment, the metal panel 2 is formed with a bending edge 22 bending inward on the periphery of the display window 21, and the bending edge 22 is provided with a through hole 221, where the through hole 221 may be rectangular and is close to the end of the bending edge 22. The second connecting end 43 of the antenna wafer 4 is inserted into the through hole 221 of the bending edge 22, so that the antenna wafer 4 is reliably connected with the metal panel 2. Meanwhile, one end of the rear cover 35 of the display module 3 is attached to the second connection end 43, and the surface of the second connection end 43 is attached to the inner wall of the bent edge 22 of the metal panel 2, so that the second connection end 43 is abutted to the bent edge 22 under the jacking pressure of the rear cover 35, and the contact yield of the second connection end 43 and the metal panel 2 is improved.

Referring to fig. 10, in another embodiment, the first connection end 42 of the antenna pellet 4 is substantially U-shaped, and the second connection end 43 is substantially saw-tooth shaped. The circuit board 31 is provided with an electrical pad 314 connected to the ground plane 311, and the first connection end 42 is inserted and fixed to the electrical pad 314, so that the first connection end 42 contacts the electrical pad 314 to electrically connect the first connection end 42 to the ground plane 311. The second connecting end 43 is inserted and fixed in the through hole 221 or abutted to the metal panel 2, so that point contact between the second connecting end 43 and the metal panel 2 can be realized, and meanwhile, the saw-tooth-shaped second connecting end 43 improves good conductivity with the metal panel 2, and the contact yield is improved. It should be noted that the shapes of the first connecting end and the second connecting section may be changed according to practical situations, and the present disclosure is not limited thereto.

The antenna sheet 4 is described with reference to the drawings, and the principle of the antenna sheet 5 is similar, which is not described herein again.

Based on various feasible connection modes including but not limited to the above embodiments, the present solution forms a loop by connecting at least two

antenna pressing sheets

4 and 5, the metal panel 2, the ground plane 311, the feed potential 312 and the wireless communication circuit 33, wherein the at least two

antenna pressing sheets

4 and 5, the ground plane 311 and the metal panel 2 together form an antenna radiator, the antenna radiator is used as a part of an antenna and receives or transmits wireless communication signals integrally, so that the wireless communication signal receiving range and the transmitting range of the wireless communication circuit 33 are expanded, the shielding effect of the metal panel 2 on the wireless communication signals is avoided, thereby reducing the interference of a metal environment on the wireless communication signals, and further improving the stability of the wireless communication signals.

As shown in fig. 4, the

antenna patches

4 and 5 are spaced apart from the gap 6 along the side 313 of the circuit board 31 to form an antenna radiation slot area 61, and the antenna radiation slot area 61 is substantially rectangular and enclosed by four sides to form a sealing area. The antenna radiation slot region 61 is advantageous for improving the efficiency of the antenna radiator in receiving or transmitting wireless communication signals. The length of the antenna radiation slot region 61 is 1/2 antenna wavelengths, and the width of the antenna radiation slot region 61 is the distance between the outer edge of the ground plane 311 and the inner edge of the display window 21, and the distance is 1mm to 10 mm.

Further, the width of the antenna radiation slot area 61 is 2mm, i.e. the pitch is 2 mm. Since the ground plane 311 is flush with the side edge 313 of the circuit board 31, the

antenna sheets

4 and 5 can be easily butted against the ground plane 311.

For the antenna radiation slot region 61, the length of the antenna radiation slot region 61 is 1/2 antenna wavelengths, and the width of the antenna radiation slot region 61 is the distance between the outer edge of the ground plane 311 and the inner edge of the display window 21. The antenna frequency may be 2.4G, 5G, 2.4G +5G, or the like.

Fig. 11 is a schematic view of the radiation principle of a plate-shaped symmetric array antenna. Fig. 12A is an E-plane pattern radiated by the antenna of the present disclosure, and fig. 12B is an H-plane pattern radiated by the antenna of the present disclosure.

Referring to fig. 11, the length 2l of the plate-like symmetric array is 1/2 antenna wavelength and the width is w.

Referring to fig. 12A and 12B, the directional pattern of the slot antenna of the present disclosure has duality to the directional pattern of the planar dipoles, the E-plane directional pattern of the slot antenna is the same as the H-plane directional pattern of the planar dipoles, and the H-plane directional pattern of the slot antenna is the same as the E-plane directional pattern of the planar dipoles.

Fig. 13 is a test chart of standing wave ratio radiated by the antenna of the present disclosure. Table 1 is a table comparing the efficiency of the antenna radiation of the present disclosure.

Referring to fig. 13 and table 1, when the widths of the antenna radiator and the antenna radiation slot region 61 are tested, it is found that the preferred width of the antenna radiation slot region 61 is 2mm, and whether the antenna radiator and the radio wave transmitting station are matched is indicated by the standing wave ratio. If the standing wave ratio is equal to 1, the electric wave transmitted to the antenna radiator is not reflected, and the antenna radiator is in an optimal state. Meanwhile, when the width of the antenna radiation slot area 61 is 2mm, the efficiency of the antenna radiator is high, and the efficiency is up to 10% compared with the original antenna.

Further, in other embodiments of the present disclosure, the number of the antenna patches is greater than 2, forming a multi-mode antenna form, for example, the antenna radiation slot area between two antenna patches covers one operating frequency band, and the antenna radiation slot area between two other antenna patches covers another operating frequency band.

In an embodiment of the present disclosure, the number of the antenna patches may be 4, and an antenna radiation slot region between any two antenna patches may cover different operating frequency bands. Each antenna pressing sheet is arranged along the lower side of the circuit board at intervals in turn, so that the adjacent antenna pressing sheets form an antenna radiation gap area under the basis of combining the circuit board and the metal panel, and each antenna pressing sheet can separate the gap into a plurality of antenna radiation gap areas. The plurality of antenna radiation slot regions are not limited to be arranged adjacently, and may be provided at intervals or arranged to face each other. The efficiency of receiving or transmitting wireless communication signals of the antenna radiating bodies is greatly achieved through the plurality of antenna radiation gap areas, the wireless communication function failure of the indoor unit of the air conditioner caused by the damage of one antenna radiation gap area is prevented, and the service life of the indoor unit of the air conditioner is prolonged.

In an embodiment of the present disclosure, there is also provided an antenna applied to the refrigerator according to any one of the preceding embodiments, the refrigerator including a refrigerator main body, a metal panel, and a display module; the display module includes: a circuit board and a wireless communication circuit; the circuit board is positioned in the display window, and a ground plane and a feed position are arranged on the circuit board; the wireless communication circuit is arranged on the circuit board and is electrically connected with the circuit board; the wireless communication circuit is respectively and electrically connected with the grounding surface and the feed position; the antenna includes:

at least two antenna patches arranged at intervals along one side of the circuit board; one end of at least one antenna pressing sheet is connected with the grounding surface, and the other end of the antenna pressing sheet is connected with the metal panel; one end of at least one antenna pressing sheet is connected with the feed potential, and the other end of the antenna pressing sheet is connected with the metal panel, so that at least two antenna pressing sheets, the display module and the metal panel form an antenna radiator.

The antenna of this embodiment has similar implementation principle and technical effect to those of any of the foregoing embodiments, and is not described herein again.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigerator, characterized by comprising:

at least two antenna pressing sheets, wherein one end of at least one antenna pressing sheet is connected with the grounding surface, and the other end of at least one antenna pressing sheet is connected with the metal panel; one end of at least one antenna pressing sheet is connected with the feed potential, and the other end of the antenna pressing sheet is connected with the metal panel;

the area of the circuit board is smaller than that of the display window;

the antenna comprises a display window, a ground plane, at least two antenna pressing sheets and an antenna radiation gap area, wherein a gap is formed between the outer edge of the ground plane and the inner edge of the display window, the at least two antenna pressing sheets are arranged on the gap at intervals to form the antenna radiation gap area, and the antenna radiation gap area is a rectangular sealing area formed by surrounding four edges and used for improving the efficiency of receiving or transmitting wireless communication signals of an antenna radiation body.

2. The refrigerator according to claim 1, wherein the distance between any two of the antenna patches is half of the corresponding antenna wavelength; the width of the gap is 1 mm-10 mm.

3. The refrigerator of claim 1, wherein the ground plane is notched at the feed potential; at least one antenna pressing sheet is inserted into the notch and connected with the feed position.

4. The refrigerator of claim 1, wherein the ground plane on the circuit board has a hollowed area, and the wireless communication circuit is located in the hollowed area.

5. The refrigerator according to any one of claims 1 to 4,

further comprising: the display screen is located in the display window and electrically connected with the circuit board, and the circuit board is located on the inner side of the display screen.

6. The refrigerator according to claim 5, further comprising a cover plate and a rear cover; the cover plate is clamped on the circuit board through a clamping piece and covers the display window; the rear cover is positioned on one surface of the circuit board far away from the display screen.

7. The refrigerator as claimed in claim 6, wherein an end of at least two of the antenna pads remote from the circuit board is sandwiched between the rear cover and the metal panel, such that the at least two antenna pads are respectively abutted against the metal panel.

8. The refrigerator as claimed in claim 7, wherein at least two of the antenna pads are saw-toothed at an end thereof away from the circuit board.