Respirator

Abstract

The respirator is provided with a drainage channel and an air pressure balance channel, the air pressure balance channel can be communicated with the drainage channel and the external atmosphere, the respirator is further provided with a buoy and a sealing piece, the sealing piece has elasticity, and the air pressure balance channel comprises a first channel, a second channel and a valve port channel. The first channel is communicated with the external atmosphere, and the second channel is communicated with the drainage channel; the valve port channel is located in the sealing piece, the valve port channel penetrates through the sealing piece in the thickness direction of the sealing piece, one end of the valve port channel communicates with the first channel, and the other end of the valve port channel can communicate with the second channel; the buoy can move in the air pressure balance channel so as to open or close the valve port channel. Thus, when the buoy closes the valve port channel, due to the fact that the sealing piece has elasticity, abrasion caused by impact can be reduced, and the sealing performance is further guaranteed through cooperation of the buoy and the sealing piece.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, particularly to dishwashers, and especially to a respirator. Background Technology

[0002] In related technologies, the respirator is equipped with a one-way valve structure, which includes a first buoy and a valve port. The first buoy and the valve port abut against each other to close the corresponding channel of the valve port. The first buoy and the valve port are in a hard contact. After long-term use, the first buoy and the valve port will wear down, which will lead to a decrease in sealing performance and leakage problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, the following technical solutions are provided:

[0004] A respirator has a drainage channel and a pressure balancing channel, the pressure balancing channel being connected to the drainage channel and the outside atmosphere respectively, the respirator also has a buoy and a seal, the seal being elastic, the pressure balancing channel including a first channel, a second channel and a valve port channel, the first channel being connected to the outside atmosphere, and the second channel being connected to the drainage channel;

[0005] The valve port channel is located in the sealing element, and the valve port channel passes through the sealing element along the axial direction of the sealing element. One end of the valve port channel is connected to the first channel, and the other end of the valve port channel can be connected to the second channel.

[0006] The buoy can move within the second channel to open or close the valve passage.

[0007] Since the valve passage is located within the seal, and the seal is elastic, when the buoy closes the valve passage, the elasticity of the seal reduces wear caused by impact, and the cooperation between the buoy and the seal further ensures the sealing performance. Attached Figure Description

[0008] Figure 1 This is a schematic diagram illustrating one embodiment of this application;

[0009] Figure 2 for Figure 1 Enlarged schematic diagram of region A in the middle;

[0010] Figure 3 for Figure 2 Enlarged schematic diagram of region B in the middle;

[0011] Figure 4 for Figure 3 Schematic diagram of the central sealing component;

[0012] Figure 5 for Figure 2 A schematic diagram of a mid-buoy;

[0013] Figure 6 This is a schematic diagram illustrating another embodiment of this application;

[0014] Figure 7 for Figure 6 Schematic diagram of the central sealing component;

[0015] Figure 8 This is a schematic diagram illustrating another embodiment of the present application;

[0016] Figure 9 for Figure 8 A schematic diagram of the central sealing element.

[0017] Figure label:

[0018] 1. Drainage channel; 2. Air pressure balance channel; 3. Buoy; 4. Seals;

[0019] 11. Inlet section; 12. Outlet section; 13. Partition wall section;

[0020] 21. First channel; 22. Second channel; 221. Body wall; 222. Limiting flange; 31. Second mating part; 32. Third mating part;

[0021] 41. Valve port passage; 42. Bend; 43. Main body; 44. First mating part; 45. Connecting part;

[0022] 23. First fixed mating part; 46. First fixed mating part. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the specific embodiments are further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] like Figure 1-5As shown, a respirator has a drainage channel 1 and a pressure balancing channel 2. The pressure balancing channel 2 can be connected to the drainage channel 1 and the outside atmosphere respectively. The respirator also has a buoy 3 and a sealing element 4. The sealing element 4 is elastic and is sealed and fixed to the body of the respirator. The pressure balancing channel 2 includes a first channel 21, a second channel 22 and a valve port channel 41. The first channel 21 is connected to the outside atmosphere, and the second channel 22 is connected to the drainage channel 1. The valve port channel 41 is located in the sealing element 4 and penetrates the sealing element 4 along the thickness direction of the sealing element 4 (in this embodiment, the sealing element is a rotating structure, so the thickness direction of the sealing element is also the axial direction of the sealing element). One end of the valve port channel 41 is connected to the first channel 21, and the other end of the valve port channel 41 can be connected to the second channel 22. The buoy 3 can move within the pressure balancing channel 2 to open or close the valve port channel 41. When buoy 3 opens valve port channel 41, drainage channel 1 is connected to the outside atmosphere through air pressure balance channel 2; when buoy 3 closes valve port channel 41, drainage channel 1 cannot be connected to the outside atmosphere through air pressure balance channel 2, that is, drainage channel 1 is not connected to the outside atmosphere.

[0025] Since the valve port passage 41 is located in the seal 4, and the seal 4 is elastic, when the float 3 closes the valve port passage 41, the elasticity of the seal 4 can reduce the wear caused by impact, and the cooperation between the float 3 and the seal 4 further ensures the sealing performance.

[0026] In this embodiment, the seal 4 is made of an elastic material, such as rubber; in some embodiments, the seal may also be elastic by having a deformable structure.

[0027] The seal 4 has a bend 42 located on the wall corresponding to the valve port passage 41, along the axial direction of the seal 4 and from the valve port passage 41 toward the second passage 22. The projection of the bend 42 is located on the float 3, and the bend 42 can seal with the float 3.

[0028] Since the projection of the bend 42 is located on the float 3 along the axial direction of the seal 4 and from the valve port passage 41 toward the second passage 22, the bend 42 limits the float 3. When the float 3 moves along the extension path of the second passage 22 toward the seal 4 and comes into contact with the bend 42, the bend 42 and the float 3 form a sealing fit.

[0029] The seal 4 includes a main body 43 and a first mating part 44. The first mating part 44 is connected to the main body 43, and the main body 43 is sealed and fixed to the body of the respirator. Along the axial direction of the seal 4, the first mating part 44 is further away from the first channel 21 than the main body 43. Along the axial direction of the seal 4 and from the second channel 22 toward the first channel 21, the inner diameter of the first mating part 44 gradually decreases. At the connection between the first mating part 44 and the main body 43, a bend 42 is formed on the wall corresponding to the valve port channel 41.

[0030] As the inner diameter of the first mating part 44 gradually decreases along the axial direction of the seal 4 and from the second channel 22 toward the first channel 21, the first mating part 44 guides the float 3, which facilitates the end of the float 3 entering the valve port channel 41 so that it can seal with the bend 42.

[0031] The buoy 3 has a second mating part 31, which can seal with the bend 42; along the axial direction of the seal 4 and from the first channel 21 toward the second channel 22, the outer diameter of the second mating part 31 gradually increases, and the absolute value of the rate of change of the outer diameter of the second mating part 31 also gradually increases.

[0032] As the outer diameter of the second mating part 31 gradually increases along the axial direction of the seal 4 and from the first channel 21 toward the second channel 22, and the absolute value of the rate of change of the outer diameter of the second mating part 31 also gradually increases, that is, the second mating part 31 is relatively concave, thereby facilitating the second mating part 31 and the bend 42 to achieve a line seal.

[0033] The buoy 3 has a third mating part 32, which can abut against the first mating part 44; along the axial direction of the seal 4, the third mating part 32 is farther away from the first channel 21 than the second mating part 31; along the axial direction of the seal 4 and from the second channel 22 toward the first channel 21, the outer diameter of the second mating part 31 gradually decreases, and the absolute value of the rate of change of the outer diameter of the second mating part 31 gradually increases.

[0034] As the outer diameter of the second mating part 31 gradually decreases along the axial direction of the seal 4 and from the second channel 22 toward the first channel 21, and the absolute value of the rate of change of the outer diameter of the second mating part 31 gradually increases, the third mating part 32 is relatively convex. As the third mating part 32 is farther away from the first channel 21 than the second mating part 31 along the axial direction of the seal 4, and the third mating part 32 can abut against the first mating part 44, when the third mating part 32 abuts against the first mating part 44, it can drive the first mating part 44 to be compressed or bent from the second channel 22 toward the first channel 21, thereby causing the bent part 42 to bend from the first channel 21 toward the second channel 22, thereby increasing the tightness of the fit between the second mating part 31 and the bent part 42 and improving the reliability of the seal.

[0035] The body of the respirator has a first fixed fitting part 23, and the sealing member 4 has a first fixed fitting part 46. The first fixed fitting part 23 is fixed to the first fixed fitting part 46.

[0036] like Figure 3 As shown, in this embodiment, the first fixing part 23 is a flange, and the first fixed part 46 is a groove. The groove is located in the main body 43 of the seal 4, and part or all of the flange is located in the groove (specifically, the flange is limited to the groove, thereby fixing the first fixing part 23 and the first fixed part 46); Figure 8 and 9 As shown, in some embodiments, the first fixing part 23 may be a groove and the first fixed part 46 may be a flange.

[0037] The drainage channel 1 includes an inlet section 11 and an outlet section 12; the body of the respirator has a partition wall 13, with at least a portion of the inlet section 11 and at least a portion of the outlet section 12 located on opposite sides of the partition wall 13; the second channel 22 is connected to the inlet section 11. Specifically, the partition wall 13 divides the drainage channel 1 into an inlet section 11 and an outlet section 12 arranged sequentially in the left-right direction, and the upper end of the partition wall 13 is spaced apart from the top wall of the drainage channel 1, so that the top of the inlet section 11 communicates with the top of the outlet section 12. The inlet section 11 extends from bottom to top, and the outlet section 12 extends from top to bottom, so that the drainage channel 1 is approximately U-shaped.

[0038] The wall corresponding to the second channel also has a main body wall portion 221 and a limiting flange portion 222, with the limiting flange portion 222 protruding from the main body wall portion 221; along the extension direction of the second channel 22, part or all of the buoy 3 is located between the seal 4 and the limiting flange portion 222; the buoy 3 can be limited and engaged with the limiting flange portion 222.

[0039] Since the buoy 3 can move along the extension path of the second channel 22 and the second channel 22 is connected to the water inlet section 11; and along the extension direction of the second channel 22, part or all of the buoy 3 is located between the seal 4 and the limiting flange 222, the limiting flange 222 plays a limiting role on the buoy 3, thereby preventing the buoy 3 from leaving the second channel 22 and entering the water inlet section 11.

[0040] When the dishwasher drains, the water level in the inlet section 11 rises, the float 3 moves upward to close the valve port channel 41, and the sewage first passes through the inlet section 11 and then is discharged through the outlet section 12. When sewage backflow occurs (that is, when sewage flows from the outlet section 12 to the inlet section 11), the float 3 moves downward to open the valve port channel 41, and the drain channel 1 is connected to the atmosphere, thereby blocking the sewage backflow.

[0041] Figure 6 and 7 Another embodiment is shown. In this embodiment, the seal 4 includes a main body 43, a connecting part 45, and a first mating part 44. The main body 43 is sealed and fixed to the body of the respirator. The two ends of the connecting part 45 are respectively connected to the main body 43 and the first mating part 44. Along the axial direction of the seal 4, the first mating part 44 is farther away from the first channel 21 than the main body 43. Along the axial direction of the seal 4 and from the second channel 22 toward the first channel 21, the inner diameter of the first mating part 44 gradually decreases, and the inner diameter of the connecting part 45 gradually increases. A bend 42 is formed at the connection between the first mating part 44 and the connecting part 45 on the wall corresponding to the valve port channel 41.

[0042] As the inner diameter of the first mating part 44 gradually decreases along the axial direction of the seal 4 and from the second channel 22 toward the first channel 21, the inner diameter of the connecting part 45 gradually increases, and a bend 42 is formed at the connection between the first mating part 44 and the connecting part 45. Thus, the bend 42 protrudes relatively, which facilitates the sealing fit between the bend 42 and the second mating part 31.

[0043] Along the axial direction of the seal 4 and from the first mating part 44 toward the main body part 43, the outer diameter of the first mating part 44 gradually decreases, and the outer diameter of the connecting part 45 gradually increases. The connecting part 45 is connected to the first mating part 44, and a groove is formed between the outer side of the connecting part 45 and the outer side of the first mating part 44. In this way, when the first mating part 44 is subjected to external force, it can bend or deform toward the groove, thereby making the seal elastic.

[0044] Because a groove is formed between the outer side of the connecting part 45 and the outer side of the first mating part 44, when the third mating part 32 abuts against the first mating part 44, it is easy for the first mating part 44 to bend or deform from the second channel 22 toward the first channel 21, thereby causing the bent part 42 to bend from the first channel 21 toward the second channel 22, thereby increasing the tightness of the fit between the second mating part 31 and the bent part 42 and improving the reliability of the seal.

[0045] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A respirator having a drain passage (1) and an air pressure equalization passage (2) which can communicate with the drain passage (1) and the outside atmosphere, respectively, characterized in that, the respirator further has a float (3) and a seal member (4) having elasticity, the air pressure equalization passage (2) includes a first passage (21) which communicates with the outside atmosphere, a second passage (22) which communicates with the drain passage (1), and a valve port passage (41), the valve port passage (41) is located in the seal member (4), the valve port passage (41) penetrates the seal member (4) in the thickness direction of the seal member (4), one end of the valve port passage (41) communicates with the first passage (21), and the other end of the valve port passage (41) can communicate with the second passage (22), the float (3) can move in the air pressure equalization passage (2) to open or close the valve port passage (41).

2. The respirator of claim 1, wherein, the seal member (4) has a bent portion (42) located in the wall corresponding to the valve port passage (41) in the axial direction of the seal member (4) and in the direction from the valve port passage (41) toward the second passage (22), a projection of the bent portion (42) is located in the float (3), and the bent portion (42) can sealably engage with the float (3).

3. The respirator of claim 2, wherein, the seal member (4) includes a main body portion (43) and a first engagement portion (44) connected to the main body portion (43) in the axial direction of the seal member (4) and farther from the first passage (21) than the main body portion (43), the inner diameter of the first engagement portion (44) gradually decreases in the axial direction of the seal member (4) and in the direction from the second passage (22) toward the first passage (21), the connection between the first engagement portion (44) and the main body portion (43) forms the bent portion (42) in the wall corresponding to the valve port passage (41).

4. The respirator of claim 2, wherein, the seal member (4) includes a main body portion (43), a connection portion (45), and a first engagement portion (44), the main body portion (43) is fixed to the body of the respirator, the connection portion (45) has both ends connected to the main body portion (43) and the first engagement portion (44), respectively, the inner diameter of the first engagement portion (44) gradually decreases and the inner diameter of the connection portion (45) gradually increases in the axial direction of the seal member (4) and in the direction from the second passage (22) toward the first passage (21), the connection between the first engagement portion (44) and the connection portion (45) forms the bent portion (42) in the wall corresponding to the valve port passage (41).

5. The respirator of claim 4, wherein, the outer diameter of the first engagement portion (44) gradually decreases and the outer diameter of the connection portion (45) gradually increases in the axial direction of the seal member (4) and in the direction from the first engagement portion (44) toward the main body portion (43). The connecting part (45) is connected with the first matching part (44), and a groove is formed between the outer side of the connecting part (45) and the outer side of the first matching part (44).

6. The respirator of claims 3 or 4, wherein, The float (3) has a second matching part (31) capable of sealingly matching with the bending part (42). In the axial direction of the sealing element (4) and from the first channel (21) to the second channel (22), the outer diameter of the second matching part (31) gradually increases, and the absolute value of the change rate of the outer diameter of the second matching part (31) also gradually increases.

7. The respirator of claim 6, wherein, The float (3) has a third matching part (32) capable of abutting against the first matching part (44). In the axial direction of the sealing element (4), the third matching part (32) is farther away from the first channel (21) than the second matching part (31). In the axial direction of the sealing element (4) and from the second channel (22) to the first channel (21), the outer diameter of the second matching part (31) gradually decreases, and the absolute value of the change rate of the outer diameter of the second matching part (31) gradually increases.

8. The respirator of any one of claims 1 to 5, wherein, The body of the respirator has a first fixed matching part (23), and the sealing element (4) has a first fixedly matched part (46), the first fixed matching part (23) is fixed with the first fixedly matched part (46). One of the first fixed matching part (23) and the first fixedly matched part (46) is a flange, and the other of the first fixed matching part (23) and the first fixedly matched part (46) is a groove, at least part of the flange is located in the groove.

9. The respirator of any one of claims 1 to 5, wherein, The drain channel (1) comprises a water inlet passage section (11) and a water outlet passage section (12). The body of the respirator has a partition wall part (13), and at least part of the water inlet passage section (11) and at least part of the water outlet passage section (12) are located on two sides of the partition wall part (13) respectively. The second channel (22) is connected with the water inlet passage section (11).

10. The respirator of any one of claims 1 to 5, wherein, The wall corresponding to the second channel (22) has a body wall part (221) and a limiting flange part (222), the limiting flange part (222) protrudes from the body wall part (221); in the extension direction of the second channel (22), at least part of the float (3) is located between the sealing element (4) and the limiting flange part (222); the float (3) can be limitedly matched with the limiting flange part (222).

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