Waterproof draining structure of kitchen air conditioner
By setting up a choke plate between the lower end of the evaporator of the kitchen air conditioner and the water connection tray, and setting up a waterproof structure between the upper and lower plates, the problems of poor waterproofing and poor drainage of the kitchen air conditioner are solved, and the stable discharge of condensate and the extension of the fan life are achieved.
Patent Information
- Application Number
- CN202421532906.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The existing kitchen air conditioners are prone to poor waterproofing and poor drainage in structure, which leads to the inability to discharge condensate water stably, affects the life of the fan, and may lead to damage to the internal water inlet.
A kitchen air-conditioning waterproof underwater structure including a shell, horizontal partition, upper side plate and lower side plate is designed. By setting a choke plate between the lower end of the evaporator and the water connection plate, the connection between the water chamber and the air inlet hole is blocked, condensate water flows into the fan under wind pressure, and a waterproof structure is set between the upper side plate and the lower side plate to achieve effective waterproofing.
Ensure stable discharge of condensate, extend the service life of the fan, improve the reliability and stability of air conditioning operation, and achieve effective waterproofing and drainage effects through compact structure and low-cost processing methods.
Smart Images

Figure CN222811917U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a kitchen air conditioner, in particular to a waterproof drainage structure of the kitchen air conditioner. Background Art
[0002] Kitchen air conditioner is a temperature control device specially designed for kitchen. It includes a main unit, an upper chamber is provided in the main unit, an evaporator and a fan are provided in the upper chamber. The fan is used to absorb air and generate negative pressure, thereby exchanging heat with the evaporator. Since there is a gap between the lower end of the evaporator and the water tray, an air duct will be formed under the negative pressure of the fan. Figure 5 , causing the condensed water at the lower end of the evaporator to flow toward the air inlet end of the fan under wind pressure (negative pressure) and enter the fan, affecting the effective drainage of the condensed water and the life of the fan; at the same time, due to structural reasons, the existing kitchen air conditioner is prone to internal water ingress when the upper and lower bodies are combined. Due to the working environment of the kitchen air conditioner itself, when water ingress occurs, it is easy to cause the product to malfunction due to internal water ingress, affecting the working of the internal electrical devices of the machine, thereby affecting the life of the product. Utility Model Content
[0003] Technical issues to be solved
[0004] The technical problem to be solved by the utility model is to provide a kitchen air conditioner waterproof drainage structure which has compact structure, good waterproof and drainage effects, long service life, convenient processing and low manufacturing cost.
[0005] Technical solutions to the problem
[0006] The utility model provides a waterproof drainage structure for a kitchen air conditioner, which comprises a shell 1, wherein a horizontal partition plate 11 is arranged in the shell 1 and divides the shell 1 into an upper chamber and a lower chamber, wherein an evaporator 4 and a fan 6 are arranged in the upper chamber, and an air inlet hole 101 for heat exchange of the evaporator 4 is opened on the side wall of the upper chamber, and a water receiving tray 12 with a drainage hole 120 is obliquely arranged at the lower end of the evaporator 4, and a gap is provided between the lower end of the evaporator 4 and the water receiving tray 12 to form a lower drainage chamber, and an air blocking plate 5 is fittedly installed at the lower end of the evaporator 4, and the edge of the air blocking plate 5 is sealed and connected to the inner wall of the shell 1 and blocks the communication between the lower drainage chamber and the air inlet hole, so that no airflow can be generated in the lower drainage chamber.
[0007] Furthermore, the edge of the wind blocking plate 5 is sealed and connected to the inner wall of the shell having the air inlet hole.
[0008] Furthermore, the edge of the wind blocking plate 5 is bent upward to form a connection portion that can fit the inner wall of the housing 1 and achieve a sealed connection.
[0009] Furthermore, the upper chamber includes a left chamber and a right chamber, the evaporator 4 is installed in the left chamber, at least one side wall of the left chamber is provided with the air inlet hole, and the fan 6 is arranged in the right chamber.
[0010] Furthermore, the evaporator 4 includes a first evaporator body 41 parallel to and close to the front end and / or rear end side walls of the shell, the front end and / or rear end of the shell 1 is provided with the air inlet hole, and the lower end of the first evaporator body 41 is fitted with a first wind baffle plate 51, the edge of the first wind baffle plate 5 is sealed and connected to the inner wall of the front end and / or rear end of the shell 1, and the head and / or tail of the lower water chamber are sealed.
[0011] Furthermore, the evaporator 4 includes a second evaporator body 42 parallel to and close to the left side wall of the shell 1, the left side wall of the shell 1 is provided with the air inlet hole, and the lower end of the second evaporator body 42 is fitted with a second wind baffle plate 52, and the edge of the second wind baffle plate 52 is sealed and connected to the left side wall.
[0012] Furthermore, the side walls of the upper cavity and the lower cavity are respectively provided with an upper side plate 2 and a lower side plate 3;
[0013] The edge of the horizontal partition 11 is bent upward to form a first bent portion 111;
[0014] The lower end of the upper side plate 2 is bent inward to form a second bent portion 21, the end of the second bent portion 21 is bent upward to form a third bent portion 22, and the end of the third bent portion 22 is bent inward to form a fourth bent portion 23;
[0015] The upper end of the lower side plate 31 is bent inward to form a fifth bent portion 31 , and the end of the fifth bent portion 32 is bent upward to form a sixth bent portion 32 . The sixth bent portion 32 is parallel to and in contact with the first bent portion 111 .
[0016] Furthermore, an end portion of the fourth bending portion 23 contacts an outer wall of the first bending portion 111 .
[0017] Furthermore, the second bending portion 21 is parallel to the fourth bending portion 23 and / or the fifth bending portion 31 .
[0018] Furthermore, the bending angles of the second bending portion 21 , the third bending portion 22 and the fourth bending portion 23 are all 90 degrees.
[0019] Furthermore, the bending angles of the fifth bending portion 31 and the sixth bending portion 32 are both 90 degrees.
[0020] Furthermore, the upper edge of the first bending portion 111 is higher than the upper edges of the fourth bending portion 23 and the sixth bending portion 32 .
[0021] Beneficial Effects
[0022] The utility model discloses a waterproof drainage structure for a kitchen air conditioner, in which a wind blocking plate is arranged between the lower end of the evaporator and the water receiving tray, so that the gap at the lower end cannot form an air duct, thereby preventing condensed water at the lower end of the evaporator from flowing toward the air inlet end of the fan under wind pressure (negative pressure) and being sucked in by the fan, thereby ensuring the stable discharge of the condensed water, extending the service life of the fan, and ensuring the reliability and stability of the overall operation of the air conditioner; a waterproof structure is arranged between the upper side plate and the lower side plate, which can achieve effective waterproofing, prevent dust and water from entering, protect the internal electrical appliances, and extend the service life; the waterproof structure is formed by stamping and bending, and has a compact structure, high strength, convenient processing, low manufacturing cost, and good waterproofing effect; the utility model discloses a waterproof drainage structure for a kitchen air conditioner, which has a compact structure, convenient processing, low manufacturing cost, can achieve effective waterproofing and drainage of the air conditioner, has good use effect, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a structural schematic diagram of the utility model kitchen air conditioner waterproof drainage structure;
[0024] Figure 2 This is a schematic structural diagram of another angle of the utility model kitchen air conditioner waterproof drainage structure;
[0025] Figure 3 This is a schematic diagram of the installation of the evaporator of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0026] Figure 4 It is a schematic diagram of the installation of the wind blocking plate of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0027] Figure 5 This is the principle diagram of the air duct generation;
[0028] Figure 6 It is a cross-sectional view of the wind blocking plate of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0029] Figure 7 This is a structural schematic diagram of the wind blocking plate of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0030] Figure 8 It is a schematic diagram of the installation of the side panels of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0031] Fig. 9 It is a cross-sectional view of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0032] Fig.10 for Fig. 9 Enlarged view of part A in the middle;
[0033] Fig.11 It is a schematic diagram of the exploded structure of the side plate of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0034] Fig.12 It is a partial enlarged view of the upper side plate of the waterproof drainage structure of the kitchen air conditioner of the utility model;
[0035] Fig.13 It is a partial enlarged view of the lower side plate of the waterproof drainage structure of the kitchen air conditioner of the utility model. DETAILED DESCRIPTION
[0036] The following is a detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings.
[0037] See also Figure 8-Figure 13 The utility model provides a kitchen air conditioner waterproof drainage structure, including a shell 1. The shell 1 is a rectangular parallelepiped structure as a whole, and an installation cavity is formed in the shell. A horizontal partition 11 is provided in the shell 1, and the horizontal partition divides the shell 1 into an upper cavity and a lower cavity for installing different air conditioning components. An upper side plate 2 is detachably installed on the side wall of the upper cavity, and an upper side plate 2 is detachably installed on the side wall of the lower cavity. In this embodiment, the upper side plate 2 and the lower side plate 3 are arranged on the front end side wall of the shell.
[0038] In the present application, the horizontal partition 11, the upper side plate 2 and the lower side plate 3 are all formed by stamping.
[0039] See also Fig.10 The edge of the horizontal partition 11 is bent upward to form a first bent portion 111.
[0040] See also Fig.10 and Fig.12 The lower end of the upper side plate 2 is bent inward to form a second bent portion 21, the end of the second bent portion 21 is bent upward to form a third bent portion 22, the end of the third bent portion 22 is bent inward to form a fourth bent portion 23, and the end of the fourth bent portion 23 contacts the outer wall of the first bent portion 111. Fig.10 and Fig.13, the upper end of the lower side plate 31 is bent inward to form the fifth bending portion 31, the end of the fifth bending portion 32 is bent upward to form the sixth bending portion 32, and the sixth bending portion 32 is parallel to the first bending portion 111, and the side wall of the sixth bending portion 32 is attached to the side wall of the first bending portion 111. At the same time, the upper edge of the first bending portion 111 is higher than the upper edge of the fourth bending portion 23 and the sixth bending portion 32, and it supports the fourth bending portion 23 and the sixth bending portion; a waterproof structure is formed between the outer side of the horizontal partition and the lower end of the upper side plate and the upper end of the lower side plate. Specifically, a waterproof structure is formed between the first, second, third, fourth, fifth and sixth bending portions to prevent external water vapor from entering the interior, ensure stable and reliable operation of the air conditioner, and extend the overall service life.
[0041] In the present application, in order to facilitate processing and assembly, the second bending portion 21 is parallel to the fourth bending portion 23 and the fifth bending portion 31 .
[0042] In this embodiment, the bending angles of the second bending portion 21 , the third bending portion 22 and the fourth bending portion 23 are all 90 degrees. Meanwhile, the bending angles of the fifth bending portion 31 and the sixth bending portion 32 are all 90 degrees.
[0043] Specifically, the edge of the horizontal partition 11 is bent upward by 90 degrees to form a first bending portion 111; the lower end of the upper side plate 2 is bent inward by 90 degrees to form a second bending portion 21, the end of the second bending portion 21 is bent upward by 90 degrees to form a third bending portion 22, the end of the third bending portion 22 is bent inward by 90 degrees to form a fourth bending portion 23, and the end of the fourth bending portion 23 is in contact with the outer wall of the first bending portion 111; the upper end of the lower side plate 31 is bent inward by 90 degrees to form a fifth bending portion 31, the end of the fifth bending portion 32 is bent upward by 90 degrees to form a sixth bending portion 32, and the sixth bending portion 32 is parallel to the first bending portion 111, and its side wall is attached to the side wall of the first bending portion 111.
[0044] The whole forms a waterproof structure.
[0045] See also Figure 1-Figure 7An evaporator 4 and a fan 6 are arranged in the upper chamber. At the same time, an air inlet hole 101 is opened on the side wall of the upper chamber. The air inlet hole 101 is used to exchange heat with the evaporator 4. Specifically, the fan generates suction to form a negative pressure in the upper chamber. Under the action of the negative pressure, the external air enters the upper chamber through the air inlet hole and exchanges heat with the evaporator. The evaporator is arranged between the air inlet hole and the fan. A water receiving pan 12 is arranged at the lower end of the evaporator 4. The water receiving pan 12 is arranged obliquely. A drainage hole is opened at the lower end (the lowest end of the inclined end) of the water receiving pan 12. Hole 120 is used for draining condensed water; there is a gap between the lower end of the evaporator 4 and the water receiving tray 12, which forms a lower water chamber. A wind blocking plate 5 is fittedly installed at the lower end of the evaporator 4, and the edge of the wind blocking plate 5 is sealed with the inner wall of the shell 1, blocking the direct connection between the lower water chamber and the air inlet, so that an air duct cannot be formed between the lower water chamber and the air inlet and airflow cannot be generated, that is, the condensed water at the lower end of the evaporator cannot flow toward the fan under the action of wind pressure, thereby ensuring the stable discharge of the condensed water. At the same time, it is prevented that the condensed water enters the fan and affects the life of the fan.
[0046] The above-mentioned air duct refers to the airflow formed in the lower water cavity. The direct reason for its formation is that the lower water cavity is located between the air inlet and the air inlet end of the fan, and the three are basically located in the same straight line. When the two ends of the lower water cavity are open, the wind will pass through the lower water cavity and enter the air inlet end of the fan, thereby generating airflow and forming an air duct, so that the condensed water at the lower end of the evaporator flows toward the fan under the action of wind. By setting a wind blocking plate, the air inlet end or the air outlet end at the front end of the lower water cavity is blocked, or the air inlet end and the air outlet end are blocked at the same time, so that airflow cannot be formed in the lower water cavity.
[0047] In the present application, the edge of the air blocking plate 5 is sealed and connected to the inner wall of the shell with an air inlet hole, that is, when an air inlet hole is opened on a side wall of the shell, the edge of the air blocking plate corresponding to the side wall is sealed and connected to the side wall. For example, if an air inlet hole is opened at the front end of the shell, the front edge of the air blocking plate is sealed and connected to the front inner wall of the shell; or if an air inlet hole is opened at the left end of the shell, the left edge of the air blocking plate is sealed and connected to the front inner wall of the shell; or if both the front end and the left side wall of the shell are opened with air inlet holes 101, the front end and left edge of the air blocking plate are sealed and connected to the front end and left side wall respectively.
[0048] In order to improve the connection reliability and sealing, in this embodiment, the edge of the wind blocking plate 5 is bent upward to form a connecting portion, which can fit the inner wall of the shell 1 and achieve a sealed connection, and can be fixed by welding.
[0049] In the present application, the upper chamber includes a left chamber and a right chamber, the evaporator 4 is installed in the left chamber, at least one side wall of the left chamber is provided with an air inlet hole, and the fan 6 is arranged in the right chamber. When the fan is working, the wind entering from the air inlet hole enters the left chamber and is discharged through the fan after heat exchange through the evaporator; the evaporator 4 includes a first evaporator body 41 parallel to the front end and / or rear end side walls of the shell, and the first evaporator body 41 is close to the front end and / or rear end side walls of the shell, and accordingly, an air inlet hole is provided at the front end and / or rear end of the shell 1, and a first wind blocking plate is fittedly installed at the lower end of the first evaporator body 41 51. The (front and / or rear) edges of the first air baffle 5 are sealed to the inner walls of the front and / or rear ends of the shell 1 to avoid the formation of an air duct. At the same time, the length direction of the first evaporator and the length direction of the lower water chamber are parallel to the entry direction. Therefore, the head or tail of the lower water chamber is sealed, or the front and rear ends of the lower water chamber are sealed at the same time. In this embodiment, the head (air inlet end) of the first air baffle is sealed to the inner wall of the shell to achieve the front end sealing of the lower water chamber. A baffle is provided at the tail of the lower water chamber. The baffle can be set independently or formed by bending the first air baffle downward.
[0050] At the same time, the evaporator 4 can also include a second evaporator body 42, which is parallel to and close to the left side wall of the shell 1. Accordingly, an air inlet hole is opened on the left side wall of the shell 1, and a second wind baffle plate 52 is installed at the lower end of the second evaporator body 42, and the left side edge of the second wind baffle plate 52 is sealed and connected to the left side wall.
[0051] The following is a description of a preferred embodiment:
[0052] A water receiving pan 12 is installed on the upper surface of the horizontal partition 11. The water receiving pan 12 is inclined, and a drainage hole is opened at the lower end of the water receiving pan 12, that is, the drainage hole is opened at the inclined lower end of the water receiving pan. The water receiving pan 12 is inclined and has an inclination to form a slope, which can guide water to the drainage hole and discharge it; an air baffle plate 5 is installed on the water receiving pan 12. The air baffle plate 5 is horizontally arranged and has a plate-like structure. The drainage hole is located directly below the air baffle plate 5. The air baffle plate 5 is fitted and installed at the lower end of the cooler. In the present application, the cross-sectional shape of the air baffle plate 5 is the same as the cross-sectional shape of the evaporator 4. In the present embodiment, the cross-sectional shape of the air baffle plate 5 and the cross-sectional shape of the evaporator 4 are both L-shaped, and it is arranged at the corner of the upper cavity.
[0053] It includes a first evaporator body 41 attached to the front end surface and a second evaporator body 42 attached to the left side. The first evaporator body and the second evaporator body form an L-shaped evaporator through an arc-shaped connecting section 43. At the same time, air inlet holes are opened on the front side wall and the left side plate of the shell.
[0054] See also Figure 7The wind blocking plate 5 is formed by stamping, and includes a first plate body 51 having the same shape as the first evaporator body (including the connecting section), and a second plate body 52 having the same shape as the second evaporator body. The first plate body is fitted on the lower surface of the first evaporator body, and the second plate body is fitted on the lower surface of the second evaporator body. A plurality of water outlet holes 50 are provided on the first plate body 51. The outer edge of the first plate body 51 (close to one end of the inner wall of the shell) is bent upward by 90 degrees to form a connecting portion. Specifically, the front end of the first plate body 51 and The left edge is bent upward to form a first connection portion 511 and a second connection portion 512, which are respectively used to be sealed and connected to the front inner wall and the left inner wall. At the same time, a baffle 53 is provided at the right end of the first plate body 51 to block the tail end of the lower water chamber. The upper end of the baffle 53 extends upward and serves as a bracket for installing the evaporator. At the same time, another bracket 54 is provided on the first plate body for fixing the evaporator. The inner edge of the first plate body (the end facing away from the inner wall of the shell) is bent downward to form a support portion 513, which is used to connect to the water receiving The upper surface of the plate 12 is in contact with the plate 12 to achieve support. In order to increase the supporting force and avoid deformation, the inner edge of the plate is bent downward by 90 degrees, which can avoid the generation of a force arm and increase the supporting force. In this embodiment, the inner edge of the first plate 51 is formed with a plurality of rectangular protrusions by stamping, and the protrusions are bent downward to form a supporting portion 512; the left edge of the second plate 52 is bent upward by 90 degrees to form a third connecting portion 521, and the third connecting portion is connected to the inner wall of the side wall of the shell to achieve sealing. The inner side of the second plate The side edge (the end facing away from the inner wall of the shell) is bent downward to form a support portion 523, which is used to contact the upper surface of the water receiving tray 12 to achieve support. In order to increase the supporting force and avoid deformation, the inner edge of the plate body is bent downward by 90 degrees, which can avoid the generation of a force arm and increase the supporting force. Since the length direction of the second evaporator body is perpendicular to the air inlet direction of the fan and it is far away from the fan, the air duct distance that can be formed at the lower end is very short. Therefore, the length of the second plate body can be 20%-100% of the length of the second evaporator body.
[0055] The utility model discloses a waterproof drainage structure for a kitchen air conditioner, in which a wind blocking plate is arranged between the lower end of the evaporator and the water receiving tray, so that the gap at the lower end cannot form an air duct, thereby preventing condensed water at the lower end of the evaporator from flowing toward the air inlet end of the fan under wind pressure (negative pressure) and being sucked in by the fan, thereby ensuring the stable discharge of the condensed water, extending the service life of the fan, and ensuring the reliability and stability of the overall operation of the air conditioner; a waterproof structure is arranged between the upper side plate and the lower side plate, which can achieve effective waterproofing, prevent dust and water from entering, protect the internal electrical appliances, and extend the service life; the waterproof structure is formed by stamping and bending, and has a compact structure, high strength, convenient processing, low manufacturing cost, and good waterproofing effect; the utility model discloses a waterproof drainage structure for a kitchen air conditioner, which has a compact structure, convenient processing, low manufacturing cost, can achieve effective waterproofing and drainage of the air conditioner, has good use effect, and long service life.
[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A kitchen air conditioner waterproof drainage structure, characterized in that: The invention comprises a shell, wherein a horizontal partition is arranged in the shell and the shell is divided into an upper chamber and a lower chamber, wherein an evaporator and a fan are arranged in the upper chamber, and an air inlet hole for exchanging heat with the evaporator is opened on the side wall of the upper chamber, and a water receiving pan with drainage holes is inclinedly arranged at the lower end of the evaporator, and a gap is provided between the lower end of the evaporator and the water receiving pan to form a lower water chamber, and an air baffle is fittedly installed at the lower end of the evaporator, and the edge of the air baffle is sealed and connected to the inner wall of the shell and blocks the connection between the lower water chamber and the air inlet hole, so that no airflow is generated in the lower water chamber.
2. The kitchen air conditioner waterproof drainage structure according to claim 1, characterized in that: The edge of the wind blocking plate is sealed to the inner wall of the shell body where the air inlet hole is opened.
3. The kitchen air conditioner waterproof drainage structure according to claim 1, characterized in that: The edge of the wind blocking plate is bent upward to form a connecting portion that can fit the inner wall of the shell and achieve a sealed connection.
4. The kitchen air conditioner waterproof drainage structure according to claim 1, characterized in that: The upper chamber comprises a left chamber and a right chamber, the evaporator is installed in the left chamber, at least one side wall of the left chamber is provided with the air inlet hole, and the fan is arranged in the right chamber.
5. The kitchen air conditioner waterproof drainage structure according to claim 4, characterized in that: The evaporator includes a first evaporator body parallel to and close to the front end and / or rear end side walls of the shell, the front end and / or rear end side walls of the shell are provided with the air inlet holes, a first wind baffle is fitted on the lower end of the first evaporator body, the edge of the first wind baffle is sealed to the inner wall of the front end and / or rear end of the shell, and the head and / or tail of the lower water chamber are sealed.
6. The kitchen air conditioner waterproof drainage structure according to claim 4, characterized in that: The evaporator includes a second evaporator body parallel to and close to the left side wall of the shell, the left side wall of the shell is provided with the air inlet hole, the lower end of the second evaporator body is fitted with a second wind baffle plate, and the edge of the second wind baffle plate is sealed and connected to the left side wall.
7. The kitchen air conditioner waterproof drainage structure according to claim 1, characterized in that: The side walls of the upper cavity and the lower cavity are respectively provided with an upper side plate and a lower side plate; The edge of the horizontal partition is bent upward to form a first bent portion; The lower end of the upper side plate is bent inwardly to form a second bent portion, the end of the second bent portion is bent upwardly to form a third bent portion, and the end of the third bent portion is bent inwardly to form a fourth bent portion; The upper end of the lower side plate is bent inward to form a fifth bent portion, and the end of the fifth bent portion is bent upward to form a sixth bent portion. The sixth bent portion is parallel to and attached to the first bent portion.
8. The kitchen air conditioner waterproof drainage structure according to claim 7, characterized in that: The upper edge of the first bending portion is higher than the upper edges of the fourth bending portion and the sixth bending portion, and the end of the fourth bending portion is in contact with the outer wall of the first bending portion.
9. The kitchen air conditioner waterproof drainage structure according to claim 7, characterized in that: The second bending portion is parallel to the fourth bending portion and / or the fifth bending portion.
10. The kitchen air conditioner waterproof drainage structure according to claim 7, characterized in that: The bending angles of the second bending portion, the third bending portion, the fourth bending portion, the fifth bending portion and the sixth bending portion are all 90 degrees.