Distributor

Abstract

The distributor comprises a body, the body is provided with a first shell and a second shell, the first shell and the second shell are fixed, a first valve cavity is formed between the first shell and the second shell, the first shell is provided with an adding opening part, the body is provided with a feeding channel and an air pressure balance channel, and the feeding channel is provided with a first valve cavity and a second valve cavity. The air pressure balance channel is provided with a first opening and a second opening, the first opening is communicated with the feeding channel, the second opening is directly or indirectly communicated with the first valve cavity, and the second opening and the adding opening are arranged in a separated mode. The second opening of the air pressure balance channel is separated from the adding opening, so that the situation that materials enter the air pressure balance channel due to the fact that the materials are added into the adding opening can be avoided, and the risk that the air pressure balance channel is blocked by the materials is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly relates to a dispenser. Background Art

[0002] In the related art, the dispenser includes an adding port for adding materials, such as rinse aid, into the inner cavity of the dispenser; the dispenser also has a discharging channel and a pressure balance channel. The discharging channel is communicated with the outside of the dispenser, and the pressure balance channel is communicated with the discharging channel and the adding port respectively; the dispenser includes a valve core. The inner cavity of the dispenser includes a receiving cavity and a first valve cavity, and the receiving cavity and the first valve cavity are indirectly communicated. The valve core controls the communication between the first valve cavity and the discharging channel.

[0003] When the dispenser works, the adding port is closed, and the adding port is communicated with the receiving cavity in the inner cavity of the dispenser. The pressure balance channel is communicated with the discharging channel, so that the receiving cavity and the first valve cavity are communicated with the outside of the dispenser, and further the pressure in the first valve cavity and the discharging channel is balanced, so that the material can flow from the first valve cavity to the discharging channel, and further the discharging is realized.

[0004] However, one opening of the pressure balance channel is located at the adding port. When adding rinse aid to the adding port, part of the rinse aid will flow into the pressure balance channel, resulting in the risk of blocking the pressure balance channel (affecting the normal pressure balance) by the rinse aid and the risk of early discharge of the rinse aid. Utility Model Content

[0005] To solve at least one of the above technical problems, the following technical solutions are provided:

[0006] A dispenser includes a body. The body has a first housing and a second housing, and the first housing and the second housing are fixed. There is a first valve cavity between the first housing and the second housing. The first housing is provided with an adding port. The body has a discharging channel and a pressure balance channel. The pressure balance channel has a first opening and a second opening. The first opening is communicated with the discharging channel, and the second opening is directly or indirectly communicated with the first valve cavity, and the second opening is separated from the adding port.

[0007] Since the first opening of the pressure balance channel is communicated with the discharging channel and the second opening is directly or indirectly communicated with the first valve cavity, the pressure balance between the first valve cavity and the discharging channel is ensured, so that the material in the first valve cavity can enter the discharging channel. And the second opening is separated from the adding port. In this way, while ensuring the pressure balance between the first valve cavity and the discharging channel, it can be avoided that the material enters the pressure balance channel due to adding material to the adding port, and further the risk of blocking the pressure balance channel by the material is reduced. Description of the Drawings

[0008] Figure 1 Schematic perspective view of an embodiment of the present application;

[0009] Figure 2 Bottom view schematic of an embodiment of the present application;

[0010] Figure 3 is Figure 2 Cross-sectional schematic along line A-A in

[0011] Figure 4 is Figure 3 Enlarged schematic of area C in

[0012] Figure 5 is Figure 2 Cross-sectional schematic along line B-B in

[0013] Figure 6 is Figure 5 Enlarged schematic of area D in

[0014] Figure 7 Schematic of the air pressure balance channel in another embodiment of the present application.

[0015] Reference numerals:

[0016] 100, body; 101, first housing; 102, second housing; 103, first valve chamber; 104, addition port; 110, valve core;

[0017] 1, delivery channel; 2, air pressure balance channel; 3, first blocking wall; 4, storage chamber; 5, balance chamber; 6, first partition wall; 7, first side wall; 8, second side wall; 9, receiving chamber; 11, communication hole; 21, first opening; 22, second opening; 23, main body section; 24, connecting section; 25, first wall; 26, second wall; 27, notch portion; 51, first connection point; 52, second connection point; 61, first sub-wall; 62, second sub-wall. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] As Figures 1-6 shown,

[0020] A dispenser, comprising a body 100, the body 100 having a first housing 101 and a second housing 102, the first housing 101 and the second housing 102 being fixed, specifically, the first housing 101 and the second housing 102 being fixedly sealed. There is a first valve chamber 103 between the first housing 101 and the second housing 102. The first housing 101 is provided with an addition port 104. The body 100 has a delivery channel 1 and a pressure balance channel 2. The pressure balance channel 2 has a first opening 21 and a second opening 22. The first opening 21 communicates with the delivery channel 1, and the second opening 22 communicates directly with the first valve chamber 103, and the second opening 22 is separated from the addition port 104.

[0021] Since the first opening 21 of the pressure balance channel 2 communicates with the delivery channel 1 and the second opening 22 communicates directly or indirectly with the first valve chamber 103, the air pressure balance between the first valve chamber 103 and the delivery channel 1 is ensured, so that the material in the first valve chamber 103 can enter the delivery channel 1. And the second opening 22 is separated from the addition port 104. In this way, while ensuring the air pressure balance between the first valve chamber 103 and the delivery channel 1, it can be avoided that the material enters the pressure balance channel 2 due to adding material to the addition port 104, thereby reducing the risk of the pressure balance channel 2 being blocked by the material.

[0022] The pressure balance channel 2 has a main body section 23 and a connecting section 24. One end of the connecting section 24 is the first opening 21, and the other end of the connecting section 24 is connected to the main body section 23; the connecting section 24 extends obliquely upward from the first opening 21.

[0023] In this way, since the first opening 21 communicates with the delivery channel 1 in the horizontal direction, the amount of material (generally liquid, specifically Finish Dishwasher Detergent) accidentally flowing into the first opening 21 can be reduced; the connecting section 24 of the pressure balance channel 2 extends obliquely upward from the first opening 21, so that it can be avoided that the material enters the connecting section 24 and has an adverse effect on the pressure balance. And even in some special cases, if part of the material enters the connecting section 24, due to the inclined setting of the connecting section 24, under the action of the gravity of the material itself, the material can discharge itself from the connecting section 24.

[0024] In some embodiments, the connecting section 24 of the pressure balance channel 2 extends in the horizontal direction from the first opening 21.

[0025] The main body 100 includes a first barrier wall 3 that protrudes from the corresponding bottom wall of the second housing 102. The first barrier wall 3 is used to separate the air pressure balance channel 2 and the dispensing channel 1. In the thickness direction (in this application, the thickness direction means the thickness direction of the dispenser, that is, the front-back direction), the minimum distance between the wall corresponding to the first opening 21 and the corresponding bottom wall of the second housing 102 is greater than the minimum distance between the wall corresponding to the first opening 21 and the corresponding bottom wall of the first housing 101. The first opening 21 is located between the first barrier wall 3 and the corresponding bottom wall of the first housing 101.

[0026] Since the first barrier wall 3 protrudes from the corresponding bottom wall of the second housing 102, in this way, the first barrier wall 3 plays a blocking role. When the dispenser is placed horizontally, it can block the material flow in the dispensing channel 1 from flowing into the air pressure balance channel 2 to ensure the function of the air pressure balance channel 2 to balance the air pressure. And the minimum distance between the wall corresponding to the first opening 21 and the corresponding bottom wall of the second housing 102 is greater than the minimum distance between the wall corresponding to the first opening 21 and the corresponding bottom wall of the first housing 101, which also ensures the relative height of the first barrier wall 3 protruding from the bottom wall of the second housing 102, thus ensuring the blocking effect.

[0027] There is a storage cavity 4 and a balance cavity 5 between the first housing 101 and the second housing 102. The balance cavity is respectively communicated with the storage cavity and the first valve cavity. In this embodiment, the balance cavity 5 has a first connection part 51 communicated with the storage cavity 4, and the balance cavity 5 also has a second connection part 52 directly or indirectly communicated with the air pressure balance channel 2. In some embodiments, the second connection part 52 is directly communicated with the air pressure balance channel 2, but in this embodiment, the second connection part 52 is indirectly communicated with the air pressure balance channel 2, that is, the second connection part 52 is separated from the air pressure balance channel 2, but the second connection part 52 is directly communicated with the following third sub-cavity, and the third sub-cavity is directly communicated with the air pressure balance channel 2, that is, the second connection part 52 is indirectly communicated with the air pressure balance channel 2 through the third sub-cavity.

[0028] The main body 100 has a first partition wall 6, a first side wall 7 and a second side wall 8 (when the dispenser is placed vertically, the first side wall 7 is above the second side wall 8). The first side wall 7 and the second side wall 8 are oppositely arranged along the longitudinal direction (in this application, the longitudinal direction is the up-down direction). The first partition wall 6 separates the balance cavity 5 and the storage cavity 4. Relative to the second side wall 8, the first partition wall 6 is closer to the first side wall 7, and in the direction from the second connection part 52 to the first connection part 51, the distance between the main body of the first partition wall 6 and the first side wall 7 gradually increases.

[0029] Since the distance between the main body of the first partition wall 6 and the first side wall 7 gradually increases in the direction of the second connection portion 52 towards the first connection portion 51, that is, the first partition wall 6 is inclined. In this way, when the dispenser is changed from the horizontal placement to the vertical placement, the material in the balance chamber 5 (entering when the dispenser is horizontally placed) can flow along the first partition wall 6 to the storage chamber 4, so that this part of the material can be reused, thereby improving the utilization rate.

[0030] In the present application, the up-down direction is perpendicular to the lateral direction. The direction of the first side wall towards the second side wall is down, and the direction of the second side wall towards the first side wall is up.

[0031] The walls corresponding to the air pressure balance channel 2 include a first wall 25 and a second wall 26. The first wall 25 is connected to the first partition wall 6, and the first wall 25 is used to separate the storage chamber 4 and the air pressure balance channel 2. The second wall 26 is used to separate the air pressure balance channel 2 and the first valve chamber 103. The second wall 26 is farther from the storage chamber 4 than the first wall 25. Along the longitudinal direction, both the first wall 25 and the second wall 26 are farther from the first side wall 7 than the first partition wall 6. The second wall 26 has a notch portion 27. In the thickness direction, the notch portion 27 is closer to the bottom wall corresponding to the first housing 101 relative to the bottom wall corresponding to the second housing 102, and the second opening 22 is located between the wall corresponding to the notch portion 27 and the bottom wall corresponding to the first housing 101. In the longitudinal direction, the notch portion 27 is closer to the first partition wall 6 than the wall corresponding to the first opening 21, and the second opening 22 is located between the wall corresponding to the notch portion 27 and the first partition wall 6.

[0032] Since in the thickness direction, the notch portion 27 is closer to the bottom wall corresponding to the first housing 101 relative to the bottom wall corresponding to the second housing 102, and the second opening 22 is located between the wall corresponding to the notch portion 27 and the bottom wall corresponding to the first housing 101, the wall corresponding to the second opening 22 is at a higher position compared to the bottom wall corresponding to the second housing 102. Thus, while balancing the air pressure, it can reduce the risk of material flowing in when the dispenser is horizontally placed; and in the longitudinal direction, the notch portion 27 is closer to the first partition wall 6 than the wall corresponding to the first opening 21, and the second opening 22 is located between the wall corresponding to the notch portion 27 and the first partition wall 6, that is, the second opening 22 is closer to the first partition wall 6 compared to the first opening 21. In this way, when the dispenser is vertically placed, the risk of material flowing in from the second opening 22 can be reduced.

[0033] Along the longitudinal direction, the projection of the wall corresponding to the second opening 22 is located on the first partition wall 6. In this way, when the dispenser changes from the horizontal placement state to the vertical placement state, the first partition wall 6 plays a blocking role, and can block the material relatively close to the first side wall 7 from flowing into the dispensing channel 1 along the longitudinal direction through the second opening 22, resulting in premature dispensing of some materials.

[0034] The first partition wall 6 has a first sub-wall 61. One side of the first sub-wall 61 is connected to the main body of the first partition wall 6, and the other side of the first sub-wall 61 is connected to the first side wall 7. The first sub-wall 61 separates the balance cavity 5 and the storage cavity 4. The first sub-wall 61 protrudes from the corresponding bottom wall of the second housing 102 in the thickness direction, and there is a preset distance between the first sub-wall 61 and the corresponding bottom wall of the first housing 101. In the thickness direction, the first connection portion 51 is located between the first sub-wall 61 and the corresponding bottom wall of the first housing 101.

[0035] Since the first sub-wall 61 protrudes from the corresponding bottom wall of the second housing 102 in the thickness direction to separate the balance cavity 5 and the storage cavity 4, when the dispenser is placed horizontally, the first sub-wall 61 can prevent the material from flowing from the storage cavity 4 to the balance cavity 5 and then possibly flowing to the dispensing channel 1, which may result in the risk of premature dispensing of the material. And the preset distance between the first sub-wall 61 and the corresponding bottom wall of the first housing 101 is used to connect the balance cavity 5 and the storage cavity 4 so that when the dispenser is placed vertically, the material in the balance cavity 5 can flow to the storage cavity 4 through this place (i.e., the first connection portion 51), thereby improving the utilization rate of the material.

[0036] The first partition wall 6 has a second sub-wall 62. The second sub-wall 62 is disposed opposite to the first sub-wall 61, and the second sub-wall 62 and the first sub-wall 61 are respectively located on both sides of the main body of the first partition wall 6. The second sub-wall 62 is connected to the main body of the first partition wall 6, and the second sub-wall 62 extends along the longitudinal direction toward the first side wall 7 from its connection with the main body of the first partition wall 6. There is a preset distance between the second sub-wall 62 and the first side wall 7, and the second connection portion 52 is located between the second sub-wall 62 and the first side wall 7.

[0037] Since the second sub-wall 62 extends along the longitudinal direction toward the first side wall 7 from its connection with the main body of the first partition wall 6, in this way, when the dispenser is placed vertically, the liquid in the balance cavity 5 can be prevented from flowing to the dispensing channel 1, thereby reducing the risk of premature dispensing of the material.

[0038] There is a receiving cavity 9 and a communication hole 11 between the first housing 101 and the second housing 102. The communication hole 11 is used to connect the first valve cavity 103 and the feeding channel 1. The dispenser further includes a valve core 110, and the valve core 110 is used to close or open the communication hole 11; along the thickness direction, the projection of the adding port 104 is located on the bottom wall corresponding to the receiving cavity 9, and the adding port 104 communicates with the receiving cavity 9; the wall corresponding to the air pressure balance channel 2 and the wall corresponding to the receiving cavity 9 are separated. Specifically, there is at least the first valve cavity 103 between the air pressure balance channel 2 and the receiving cavity 9 to separate the air pressure balance channel 2 and the receiving cavity 9. In this embodiment, there is a first valve cavity and other cavities between the air pressure balance channel 2 and the receiving cavity 9, and the first valve cavity and other cavities (corresponding walls) are used to separate the air pressure balance channel 2 and the receiving cavity 9; in some embodiments, there is a first valve cavity between the air pressure balance channel 2 and the receiving cavity 9, and the first valve cavity (corresponding wall) is used to separate the air pressure balance channel 2 and the receiving cavity 9. In this way, since there is at least the first valve cavity 103 to separate the air pressure balance channel 2 and the receiving cavity 9, the material flowing into the receiving cavity 9 through the adding port 104 is difficult to directly flow to the air pressure balance channel 2, resulting in early feeding.

[0039] During use, the dispenser is installed on the door of the dishwasher. When the door is opened, the dispenser is in a horizontal or approximately horizontal state. When the dishwasher is washing normally, the door is in a closed state. At this time, the dispenser is in a vertical state.

[0040] Figure 7 Another embodiment is shown. In this embodiment,

[0041] The second wall 26 is connected to the first partition wall 6, and the second wall 26 is used to separate the first valve cavity 103 and the air pressure balance channel 2. In this way, the second wall 26 blocks the material in the first valve cavity 103 and prevents the material from flowing into the air pressure balance channel 2, resulting in early feeding.

[0042] The first wall 25 has a notch 27. In the thickness direction, the notch 27 is closer to the bottom wall corresponding to the first housing 101 than the bottom wall corresponding to the second housing 102, and the second opening 22 is located between the wall corresponding to the notch 27 and the bottom wall corresponding to the first housing 101. In this way, the wall corresponding to the second opening 22 is at a higher position than the bottom wall corresponding to the second housing 102, so that while balancing the air pressure, the risk of material flowing into the dispenser when it is horizontally placed can be reduced; in the longitudinal direction, the notch 27 is closer to the first partition wall 6 than the wall corresponding to the first opening 21, and the second opening 22 is located between the wall corresponding to the notch 27 and the first partition wall 6, that is, the second opening 22 is closer to the first partition wall 6 than the first opening 21. In this way, when the dispenser is vertically placed, the risk of material flowing into the dispenser from the second opening 22 can be reduced.

[0043] In this embodiment, the second opening 22 is indirectly communicated with the first valve cavity 103. Specifically, the second opening 22 is directly communicated with the storage cavity 4, the storage cavity 4 is directly communicated with the balance cavity 5, and the balance cavity 5 is directly communicated with the first valve cavity 103. That is, the second opening 22 is indirectly communicated with the first valve cavity 103 through the storage cavity 4 and the balance cavity 5.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

Claims

1. A dispenser, comprising a body (100), the body (100) having a first housing (101) and a second housing (102), the first housing (101) and the second housing (102) being fixed, there being a first valve chamber (103) between the first housing (101) and the second housing (102), the first housing (101) being provided with an addition port (104), characterized in that the body (100) has a delivery channel (1) and a pressure balance channel (2), the pressure balance channel (2) having a first opening (21) and a second opening (22), the first opening (21) communicating with the delivery channel (1), the second opening (22) communicating directly or indirectly with the first valve chamber (103), and the second opening (22) being spaced apart from the addition port (104).

2. The dispenser according to claim 1, characterized in that the pressure balance channel (2) has a main section (23) and a connecting section (24), one end of the connecting section (24) being the first opening (21), the other end of the connecting section (24) being connected to the main section (23); the connecting section (24) extends from the first opening (21) in an obliquely upward direction or horizontally.

3. The dispenser according to claim 1, characterized in that there is a storage chamber (4) and a balance chamber (5) between the first housing (101) and the second housing (102), the balance chamber (5) communicating with the storage chamber (4) and the first valve chamber (103) respectively, the body (100) having a first partition wall (6), the first partition wall (6) separating the balance chamber (5) from the storage chamber (4); in the longitudinal direction, the projection of the wall corresponding to the second opening (22) lies on the first partition wall (6).

4. The dispenser according to claim 1, characterized in that there is a storage chamber (4) and a balance chamber (5) between the first housing (101) and the second housing (102), the body (100) having a first partition wall (6), a first side wall (7) and a second side wall (8), the first side wall (7) and the second side wall (8) being oppositely arranged in the longitudinal direction, the first partition wall (6) separating the balance chamber (5) from the storage chamber (4), and the first partition wall (6) being closer to the first side wall (7) than the second side wall (8). The wall corresponding to the air pressure balance channel (2) includes a first wall (25) and a second wall (26). The first wall (25) is used to separate the storage chamber (4) and the air pressure balance channel (2), and the second wall (26) is used to separate the air pressure balance channel (2) and the first valve chamber (103). Along the longitudinal direction, both the first wall (25) and the second wall (26) are farther from the first side wall (7) than the first partition wall (6). The first wall (25) or the second wall (26) has a notch (27). In the thickness direction, the notch (27) is closer to the bottom wall corresponding to the first housing (101) than the bottom wall corresponding to the second housing (102), and the second opening (22) is located between the wall corresponding to the notch (27) and the bottom wall corresponding to the first housing (101).

5. The dispenser according to claim 1, wherein There is a storage chamber (4) and a balance chamber (5) between the first housing (101) and the second housing (102). The body (100) has a first partition wall (6), a first side wall (7) and a second side wall (8). The first side wall (7) and the second side wall (8) are oppositely arranged along the longitudinal direction. The first partition wall (6) separates the balance chamber (5) from the storage chamber (4). The first partition wall (6) is closer to the first side wall (7) than the second side wall (8); The wall corresponding to the air pressure balance channel (2) includes a first wall (25) and a second wall (26). The first wall (25) is used to separate the storage chamber (4) and the air pressure balance channel (2), and the second wall (26) is used to separate the air pressure balance channel (2) and the first valve chamber (103). Along the longitudinal direction, both the first wall (25) and the second wall (26) are farther from the first side wall (7) than the first partition wall (6). The first wall (25) or the second wall (26) has a notch (27). In the longitudinal direction, the notch (27) is closer to the first partition wall (6) than the wall corresponding to the first opening (21), and the second opening (22) is located between the wall corresponding to the notch (27) and the first partition wall (6).

6. The dispenser according to any one of claims 1 to 5, wherein The body (100) includes a first blocking wall (3). The first blocking wall (3) protrudes from the bottom wall corresponding to the second housing (102). The first blocking wall (3) is used to separate the air pressure balance channel (2) from the dispensing channel (1); In the thickness direction, the minimum distance between the wall corresponding to the first opening (21) and the bottom wall corresponding to the second housing (102) is greater than the minimum distance between the wall corresponding to the first opening (21) and the bottom wall corresponding to the first housing (101), The first opening (21) is located between the first blocking wall (3) and the bottom wall corresponding to the first housing (101).

7. A dispenser according to claim 1 or 2, wherein a storage chamber (4) and a balance chamber (5) are provided between the first housing (101) and the second housing (102), the balance chamber (5) has a first connection (51) communicating with the storage chamber (4), and a second connection (52) directly or indirectly communicating with the air pressure balance passage (2), the body (100) has a first partition wall (6), a first side wall (7) and a second side wall (8), the first side wall (7) and the second side wall (8) are oppositely arranged in the longitudinal direction, the first partition wall (6) separates the balance chamber (5) from the storage chamber (4), relative to the second side wall (8), the first partition wall (6) is closer to the first side wall (7), and in the direction from the second connection (52) towards the first connection (51), the distance between the main body of the first partition wall (6) and the first side wall (7) gradually increases.

8. A dispenser according to claim 4 or 5, wherein the first partition wall (6) has a first sub-wall (61), one side of the first sub-wall (61) is connected to the main body of the first partition wall (6), and the other side of the first sub-wall (61) is connected to the first side wall (7); the first sub-wall (61) separates the balance chamber (5) from the storage chamber (4), the first sub-wall (61) protrudes from the corresponding bottom wall of the second housing (102) in the thickness direction, and a preset distance is left between the first sub-wall (61) and the corresponding bottom wall of the first housing (101); the balance chamber (5) has a first connection (51) communicating with the storage chamber (4); in the thickness direction, the first connection (51) is located between the first sub-wall (61) and the corresponding bottom wall of the first housing (101).

9. A dispenser according to claim 8, wherein the first partition wall (6) has a second sub-wall (62), the second sub-wall (62) is oppositely arranged to the first sub-wall (61), and the second sub-wall (62) and the first sub-wall (61) are respectively on both sides of the main body of the first partition wall (6), the second sub-wall (62) is connected to the main body of the first partition wall (6), and the second sub-wall (62) extends towards the first side wall (7) in the longitudinal direction from its connection with the main body of the first partition wall (6); the balance chamber (5) has a second connection (52) directly or indirectly communicating with the air pressure balance passage (2); a preset distance is left between the second sub-wall (62) and the first side wall (7), and the second connection (52) is located between the second sub-wall (62) and the first side wall (7).

10. A dispenser according to any one of claims 1 to 5, wherein There is a receiving cavity (9) between the first housing (101) and the second housing (102). In the thickness direction, the projection of the addition port (104) is located on the bottom wall corresponding to the receiving cavity (9), and the addition port (104) communicates with the receiving cavity (9). The wall corresponding to the air pressure balance channel (2) is separated from the wall corresponding to the receiving cavity (9).

11. The dispenser according to claim 10, wherein There is a communication hole (11) between the first housing (101) and the second housing (102). The communication hole (11) is used to communicate the first valve cavity (103) and the delivery channel (1). The dispenser further includes a valve core (110) for closing or opening the communication hole (11); there is at least the first valve cavity (103) between the air pressure balance channel (2) and the receiving cavity (9) for separating the air pressure balance channel (2) and the receiving cavity (9).

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