Filtering device, waterway system and dish-washing machine

Abstract

The utility model relates to a filtering device, a waterway system and a dish-washing machine, and belongs to the field of dish-washing machines, the filtering device comprises a box body assembly, the box body assembly is provided with a water inlet connector and a water outlet, the box body assembly is provided with a containing cavity, and the water inlet connector, the containing cavity and the water outlet are sequentially communicated to form a main waterway; the filtering assembly is arranged on the box body assembly, the filtering assembly is located in the main water path, and the filtering assembly is used for filtering liquid flowing through the main water path; the valve body assembly is arranged on the box body assembly, the valve body assembly is provided with an overflowing cavity or the box body assembly is provided with an overflowing cavity, the water inlet connector, the overflowing cavity and the water outlet are sequentially arranged to form a pressure relief water path, the pressure relief water path is blocked when the valve body assembly is in a first state, and the pressure relief water path is conducted when the valve body assembly is in a second state. According to the filtering device, a traditional resin cavity and a traditional salt cavity are replaced with the containing cavity, the size of the containing cavity is smaller, and the assembling space occupied by the filtering device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dishwashers, and in particular to a filtration device, a water system, and a dishwasher. Background Technology

[0002] Water treatment devices are a crucial component of dishwashers, and a typical water treatment device is a water softener. A water softener generally consists of a brine chamber and a resin chamber. In the resin chamber, sodium ions from the resin replace calcium and magnesium ions in the water. Meanwhile, brine from the brine chamber is controlled by a solenoid valve to be introduced into the resin chamber to replace calcium and magnesium ions on the resin, thus restoring the water's softening effect. However, this type of water treatment device has a relatively complex structure, many parts, and a higher cost. Utility Model Content

[0003] Therefore, it is necessary to provide a filtration device, a water system, and a dishwasher to address the issues of complex structure, numerous parts, and high cost of water treatment devices.

[0004] A filtration device includes: a housing assembly having an inlet and an outlet, the housing assembly having a receiving cavity, the inlet, the receiving cavity, and the outlet being sequentially connected to form a main water passage; a filter assembly disposed on the housing assembly and located in the main water passage, the filter assembly being used to filter liquid flowing through the main water passage; and a valve assembly disposed on the housing assembly, the valve assembly having a flow passage or the housing assembly having a flow passage, the inlet, the flow passage, and the outlet being sequentially arranged to form a pressure relief water passage, the valve assembly having at least a first state and a second state, the pressure relief water passage being blocked when the valve assembly is in the first state, and the pressure relief water passage being open when the valve assembly is in the second state.

[0005] The first aspect of this application discloses a filtration device that sequentially connects an inlet port, a receiving cavity, a filter assembly, and an outlet to filter water and prevent scale buildup during subsequent water heating. This design replaces traditional resin and salt cavities with a receiving cavity, resulting in a smaller cavity and reduced assembly space. Furthermore, the structure is simpler, with fewer parts and lower cost. A pressure-relief water path is formed by the sequential connection of the inlet port, the flow cavity, and the outlet. When the filter assembly becomes clogged, water at the inlet port can be discharged through the pressure-relief water path from the outlet, preventing product malfunction due to high pressure. Specifically, when the filter assembly is functioning normally, the valve assembly is in a first state, allowing water to be stably transported towards the receiving cavity, reducing unfiltered water reaching the outlet. When the filter assembly becomes clogged, causing increased inlet pressure, the valve automatically switches to a second state, allowing water to bypass the path to the filter assembly and flow to the outlet, preventing the filter element or housing from rupturing due to high pressure and extending product lifespan.

[0006] In one embodiment, the housing assembly includes a housing body and a cover. The housing body is provided with the water inlet and the water outlet, and the housing body also has the receiving cavity. The cover is disposed on the housing body. The cover facilitates filter component replacement while maintaining filtration performance.

[0007] In one embodiment, the housing body has an opening communicating with the receiving cavity, and the cover is disposed on the housing body and covers the opening. By positioning the cover at the opening, the receiving cavity is sealed, preventing water from leaking out of the opening without filtration, thus ensuring the effectiveness of water filtration.

[0008] In one embodiment, the cover is detachably mounted on the housing assembly. Because the cover is detachable, if the filter assembly loses its filtering effect due to clogging or other factors, the cover can be opened to replace the filter assembly, thus maintaining its filtering effectiveness. Directly replacing the filter assembly, instead of the traditional method of introducing brine into the resin chamber to restore water treatment efficiency, is more environmentally friendly.

[0009] In one embodiment, one end of the filter assembly abuts against the housing body, and the other end abuts against the cover. By having both ends of the filter assembly abut against the housing body and the cover respectively, the contact area between the filter assembly and the water is larger, resulting in better filtration. Furthermore, this creates a stable axial fixation, preventing the filter element from loosening, shifting, or falling off due to water flow impact or vibration.

[0010] In one embodiment, the receiving cavity includes a first guide cavity and a second guide cavity. The water inlet, the first guide cavity, the second guide cavity, and the water outlet are sequentially connected to form the main water path. The filter assembly is located between the first and second guide cavities. Because the filter assembly is positioned between the first and second guide cavities, the water in the first guide cavity needs to be filtered before being transported to the second guide cavity, thus purifying the water. This design allows a single receiving cavity to treat the water, eliminating the need for traditional brine and resin chambers, resulting in a simpler structure, fewer parts, and lower cost.

[0011] In one embodiment, the inlet, the flow chamber, the second guide chamber, and the outlet are sequentially connected to form the pressure relief water path. By connecting the inlet, flow chamber, second guide chamber, and outlet to form the pressure relief water path, when the main water path is clogged by the filter assembly or the system pressure abnormally increases, the pressure relief water path can serve as a bypass channel, guiding high-pressure water to bypass the filter assembly and discharge directly, thus preventing damage to the filter device due to overpressure.

[0012] In one embodiment, the second flow guide cavity is arranged around the first flow guide cavity. The second flow guide cavity surrounds the first flow guide cavity, for example, by means of an isolation plate in the housing assembly. Multiple filter components are arranged on the isolation plate at intervals, allowing the liquid in the first flow guide cavity to be filtered by the filter components located in multiple positions before being transported to the second flow guide cavity, resulting in good filtration.

[0013] In one embodiment, the second flow guiding cavity includes a first cavity and a second cavity. There are two filter components, forming a first flow guiding cavity between them. One of the two filter components encloses the housing assembly to form the first cavity, and the other of the two filter components encloses the housing assembly to form the second cavity. Both the first cavity and the second cavity are connected to the first flow guiding cavity. The first cavity and the second cavity are connected, and either the first cavity or the second cavity is connected to the water outlet. Alternatively, there are multiple water outlets, one of which is connected to the first cavity, and another of the multiple water outlets is connected to the second cavity. The second flow guide cavity is divided into a first cavity and a second cavity. The design of the first cavity and the second cavity has two possibilities. In the first case, the first cavity and the second cavity are connected and one of the first cavity and the second cavity is connected to the water outlet. In the second case, the first cavity and the second cavity are not connected and the first cavity and the second cavity are connected to the water outlet respectively. In both cases, the two filter components can work simultaneously, effectively doubling the filtration area, significantly increasing the water treatment capacity per unit time, and improving the filtration efficiency of the filter device.

[0014] In one embodiment, the valve body assembly has a first notch and a second notch. The inlet, the first notch, the flow chamber, the second notch, the second guide chamber, and the outlet are sequentially connected to form the pressure relief water path. When the valve body assembly is in the first state, the first notch and / or the second notch are blocked. The first and second notches are also part of the pressure relief water path, so either the first or second notch can be blocked, or both can be blocked simultaneously to achieve the blocking of the pressure relief water path. If neither the first nor the second notch is blocked, the pressure relief water path is open. Since the cross-sectional areas of the first and second notches are smaller than those of other cavities, this method makes it simpler and more convenient to achieve the opening and blocking of the pressure relief water path, and the blocking effect is better.

[0015] In one embodiment, the valve body assembly includes a housing, an elastic element, and a sealing element. The housing is disposed on the housing assembly and has a first notch, a flow cavity, and a second notch. The elastic element abuts against the housing and the sealing element respectively. When the valve body assembly is in the first state, the sealing element blocks the first notch; when the valve body assembly is in the second state, the first notch is open. By blocking the first notch with the sealing element, when the hydraulic pressure is too high, the hydraulic pressure directly impacts the sealing element, causing it to separate from the first notch, thus enabling water to enter from the pressure relief water path. This avoids damage to the filter device due to excessive hydraulic pressure, which would affect the service life of the filter device. This design allows the process of automatically conveying water towards the pressure relief water path when the hydraulic pressure is too high, resulting in a high degree of automation.

[0016] In one embodiment, one end of the elastic element abuts against the side of the housing away from the first notch, and the other end of the elastic element abuts against the sealing element. By abutting against the housing and the sealing element at both ends of the elastic element, the elastic element can apply a force toward the first notch to the sealing element. After the water pressure decreases, the elastic element can drive the sealing element to directly seal the first notch, so that the liquid is stably transported toward the main water channel, with a high degree of automation.

[0017] In one embodiment, the first gap and the second gap are arranged opposite to each other. By arranging the first gap and the second gap opposite to each other, the waterway path is shorter and the water transport efficiency is higher.

[0018] In one embodiment, the housing and the enclosure assembly are integrated. This integration simplifies the manufacturing process and improves practicality.

[0019] A water system includes: an inlet valve; a breather connected to the inlet valve; a filtration device connected to the breather; and a water cup assembly connected to the outlet of the filtration device.

[0020] The second aspect of this application discloses a water system in which an inlet valve, a breather, and a filter are sequentially connected to ensure a stable water flow into the filter. The pressure relief water path design of the filter automatically switches the water flow path when the filter components become clogged, preventing system damage due to high pressure. A water cup assembly is directly connected to the outlet of the filter, forming a complete water circulation system and providing a stable water source for the water cup assembly.

[0021] A dishwasher includes: the aforementioned water system.

[0022] The third aspect of this application discloses a dishwasher that ensures stable water flow and improves washing efficiency through the arrangement of an inlet valve, a breather, a filter, and a water cup assembly. By equipping the filter with pressure relief protection, damage to the water system is prevented when the water path is blocked, extending its service life. The filter's receiving chamber replaces the traditional resin chamber and salt chamber, resulting in a smaller overall space occupied by the filter and facilitating the configuration of other functional components. Attached Figure Description

[0023] Figure 1 This is a first sectional view of the filtration device;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a second sectional view of the filtration device;

[0026] Figure 4 This is an exploded view of the filtration device;

[0027] Figure 5 This is a sectional view of the housing assembly;

[0028] Figure 6 A three-dimensional view of the elastic component and the sealing component;

[0029] Figure 7 This is a schematic diagram of the waterway system connections;

[0030] Figure 8 This is an exploded diagram of the water system.

[0031] The correspondence between the reference numerals and the component names is as follows:

[0032] 1. Box assembly, 11. Box body, 12. Cover, 101. Water inlet, 102. Receiving cavity, 1021. First guide cavity, 1022. Second guide cavity, 10221. First cavity, 10222. Second cavity, 103. Water outlet, 104. Opening.

[0033] 2 Filter Components;

[0034] 3 Valve body assembly, 31 Housing, 32 Elastic element, 33 Sealing element, 301 First notch, 302 Flow cavity, 303 Second notch;

[0035] 100 inlet valve;

[0036] 200 respirators;

[0037] 300 filtration unit;

[0038] 400 water cup assembly. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Example 1

[0042] like Figure 1 , Figure 3 and Figure 4As shown, this embodiment discloses a filtration device, including: a housing assembly 1, which has an inlet port 101 and an outlet port 103, and a receiving cavity 102, wherein the inlet port 101, the receiving cavity 102, and the outlet port 103 are sequentially connected to form a main water path; a filter assembly 2, which is disposed on the housing assembly 1 and located in the main water path, and is used to filter the liquid flowing through the main water path; and a valve assembly 3, which is disposed on the housing assembly 1, and has a flow passage 302 or the housing assembly 1 has a flow passage 302, wherein the inlet port 101, the flow passage 302, and the outlet port 103 are sequentially arranged to form a pressure relief water path, wherein the valve assembly 3 has at least a first state and a second state, wherein the pressure relief water path is blocked when the valve assembly 3 is in the first state, and the pressure relief water path is open when the valve assembly 3 is in the second state.

[0043] The first aspect of this application discloses a filtration device that sequentially connects an inlet 101, a receiving cavity 102, a filter assembly 2, and an outlet 103 to filter water and prevent scale buildup during subsequent water heating. This design replaces the traditional resin and salt chambers with the receiving cavity 102, resulting in a smaller volume and reduced assembly space required for the filtration device. Furthermore, it features a simpler structure, fewer parts, and lower cost. The inlet 101, the flow chamber 302, and the outlet 103 are connected in sequence to form a pressure relief water path. When the filter assembly 2 is blocked, the water at the inlet 101 can be discharged from the outlet 103 through the pressure relief water path, avoiding product failure due to high pressure. Specifically, when the filter assembly 2 is working normally, the valve body assembly 3 is in the first state, so that the water can be stably transported towards the receiving chamber 102, reducing the amount of water transported to the outlet 103 without filtration. When the filter assembly 2 is blocked, causing the inlet pressure to rise, the valve body automatically switches to the second state, so that the water flows around the water path leading to the filter assembly 2 to the outlet 103, preventing the filter element or the housing from breaking due to high pressure and extending the product life.

[0044] like Figure 5 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the housing assembly 1 includes a housing body 11 and a cover 12; the housing body 11 is provided with the water inlet 101 and the water outlet 103; the housing body 11 is provided with the receiving cavity 102; and the cover 12 is disposed on the housing body 11. The cover 12 makes it easier to replace the filter assembly 2 while ensuring filtration performance.

[0045] like Figure 3 and Figure 4As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the box body 11 is provided with an opening 104 communicating with the receiving cavity 102, and the cover 12 is disposed on the box body 11 and covers the opening 104. By positioning the cover 12 at the opening 104, the receiving cavity 102 is sealed, preventing water from leaking out of the opening 104 without filtration, thus ensuring the effectiveness of water filtration.

[0046] like Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the cover 12 is detachably mounted on the housing assembly 1. Because the cover 12 is detachably mounted on the housing assembly 1, if the filter assembly 2 loses its filtering effect due to clogging or other factors, the cover 12 can be opened to replace the filter assembly 2, thus maintaining the filtering effect of the filter assembly 2. Directly replacing the filter assembly 2 replaces the traditional method of introducing brine into the resin chamber to restore the water treatment effect, which is more environmentally friendly.

[0047] like Figure 1 and Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: one end of the filter assembly 2 abuts against the housing body 11, and the other end of the filter assembly 2 abuts against the cover 12. By having both ends of the filter assembly 2 abut against the housing body 11 and the cover 12 respectively, the contact area between the filter assembly 2 and the water is larger, resulting in better filtration. Furthermore, it forms a stable axial fixation, preventing the filter element from loosening, shifting, or falling off due to water flow impact or vibration.

[0048] like Figure 1 and Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the receiving cavity 102 includes a first guiding cavity 1021 and a second guiding cavity 1022; the water inlet 101, the first guiding cavity 1021, the second guiding cavity 1022, and the water outlet 103 are sequentially connected to form the main water path; the filter assembly 2 is located between the first guiding cavity 1021 and the second guiding cavity 1022. Because the filter assembly 2 is located between the first guiding cavity 1021 and the second guiding cavity 1022, the water in the first guiding cavity 1021 needs to be filtered by the filter assembly 2 before being transported to the second guiding cavity 1022, thereby purifying the water. This design allows the receiving cavity 102 alone to treat the water, eliminating the need for traditional brine and resin chambers, resulting in a simpler structure, fewer parts, and lower cost.

[0049] like Figure 2 and Figure 5As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the water inlet 101, the flow passage 302, the second guide cavity 1022, and the water outlet 103 are sequentially connected to form the pressure relief water path. By sequentially connecting the water inlet 101, the flow passage 302, the second guide cavity 1022, and the water outlet 103 to form the pressure relief water path, when the main water path is blocked by the filter assembly 2 or the system pressure abnormally increases, the pressure relief water path can serve as a bypass channel, guiding the high-pressure water flow to bypass the filter assembly 2 and discharge directly, thus preventing damage to the filter device due to overpressure.

[0050] like Figure 1 and Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the second flow guiding cavity 1022 is arranged around the first flow guiding cavity 1021. The second flow guiding cavity 1022 is arranged around the first flow guiding cavity 1021. For example, the second flow guiding cavity 1022 and the first flow guiding cavity 1021 can be separated by an isolation plate of the housing assembly 1. Multiple filter components 2 are arranged on the isolation plate and spaced apart, so that the liquid in the first flow guiding cavity 1021 can be filtered by the filter components 2 located in multiple directions and then transported to the second flow guiding cavity 1022, resulting in good filtration effect.

[0051] like Figure 3As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the second flow guiding cavity 1022 includes a first cavity 10221 and a second cavity 10222; the number of filter components 2 is two; the first flow guiding cavity 1021 is formed between the two filter components 2; one of the two filter components 2 is enclosed with the housing assembly 1 to form the first cavity 10221; the other of the two filter components 2 is enclosed with the housing assembly 1 to form the second cavity 10222; both the first cavity 10221 and the second cavity 10222 are connected to the first flow guiding cavity 1021; the first cavity 10221 and the second cavity 10222 are connected, and either the first cavity 10221 or the second cavity 10222 is connected to the water outlet 103; or, the number of water outlets 103 is multiple; one of the multiple water outlets 103 is connected to the first cavity 10221; and the other of the multiple water outlets 103 is connected to the second cavity 10222. The second flow guiding cavity 1022 is divided into a first cavity 10221 and a second cavity 10222. The design of the first cavity 10221 and the second cavity 10222 has two scenarios. The first scenario is that the first cavity 10221 and the second cavity 10222 are connected and one of the first cavity 10221 and the second cavity 10222 is connected to the outlet 103. The second scenario is that the first cavity 10221 and the second cavity 10222 are not connected and the first cavity 10221 and the second cavity 10222 are respectively connected to the outlet 103. In both scenarios, the two filter components 2 can work simultaneously, effectively doubling the filtration area, significantly increasing the water treatment capacity per unit time, and improving the filtration efficiency of the filter device.

[0052] like Figure 2 and Figure 5 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the valve body assembly 3 is provided with a first notch 301 and a second notch 303; the water inlet 101, the first notch 301, the flow passage 302, the second notch 303, the second guide cavity 1022, and the water outlet 103 are sequentially connected to form the pressure relief water path; when the valve body assembly 3 is in the first state, the first notch 301 and / or the second notch 303 are blocked. The first notch 301 and the second notch 303 are also part of the pressure relief water path, so the first notch 301 or the second notch 303 can be blocked, or both can be blocked simultaneously to achieve the blocking of the pressure relief water path; if neither the first notch 301 nor the second notch 303 is blocked, the pressure relief water path is open. Since the cross-sectional area of ​​the first notch 301 and the second notch 303 is smaller than the cross-sectional area of ​​other cavities, this method makes it simpler and more convenient to achieve the opening and blocking of the pressure relief water path, and the blocking effect is better.

[0053] like Figure 2 and Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the valve body assembly 3 includes a housing 31, an elastic element 32, and a sealing element 33. The housing 31 is disposed on the housing assembly 1. The housing 31 has a first notch 301, a flow passage 302, and a second notch 303. The elastic element 32 abuts against the housing 31 and the sealing element 33 respectively. When the valve body assembly 3 is in the first state, the sealing element 33 blocks the first notch 301. When the valve body assembly 3 is in the second state, the first notch 301 is open. By blocking the first notch 301 with the sealing element 33, when the hydraulic pressure is too high, the hydraulic pressure will directly impact the sealing element 33, causing the sealing element 33 to separate from the first notch 301, realizing water intake from the pressure relief water path, and avoiding damage to the filter device due to excessive hydraulic pressure, thus affecting the service life of the filter device. This design allows the process of automatically starting to transport water towards the pressure relief water path when the hydraulic pressure is too high, resulting in a high degree of automation.

[0054] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: one end of the elastic member 32 abuts against the side of the housing 31 away from the first notch 301, and the other end of the elastic member 32 abuts against the sealing member 33. By having both ends of the elastic member 32 abut against the housing 31 and the sealing member 33 respectively, the elastic member 32 can apply a force towards the first notch 301 to the sealing member 33. After the water pressure decreases, the elastic member 32 can drive the sealing member 33 to directly seal the first notch 301, allowing the liquid to be stably transported towards the main water channel, resulting in a high degree of automation.

[0055] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the first gap 301 and the second gap 303 are arranged opposite to each other. By arranging the first gap 301 and the second gap 303 opposite to each other, the waterway path is shorter and the water transport efficiency is higher.

[0056] like Figure 2 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the housing 31 and the box assembly 1 are integrally formed. Integrating the housing 31 and the box assembly 1 simplifies the manufacturing process and improves practicality.

[0057] Example 2

[0058] like Figure 7 and Figure 8As shown, this embodiment discloses a water system, including: an inlet valve 100; a breather 200, the breather 200 being connected to the inlet valve 100; the aforementioned filter device 300, the inlet port 101 of the filter device 300 being connected to the breather 200; and a water cup assembly 400, the water cup assembly 400 being connected to the outlet port 103 of the filter device 300.

[0059] The second aspect of this application discloses a water system in which an inlet valve 100, a breather 200, and a filter 300 are sequentially connected to ensure a stable water flow into the filter 300. The pressure relief water path design of the filter 300 automatically switches the water flow path when the filter assembly 2 becomes clogged, preventing system damage due to high pressure. A water cup assembly 400 is directly connected to the outlet 103 of the filter 300, forming a complete water circulation system and providing a stable water source to the water cup assembly 400.

[0060] Example 3

[0061] This embodiment discloses a dishwasher, including the water system described above.

[0062] The third aspect of this application discloses a dishwasher that ensures stable water flow and improves washing efficiency through the arrangement of a water inlet valve 100, a breather 200, a filter device 300, and a water cup assembly 400. By equipping the filter device 300 with pressure relief protection, damage to the water system is prevented when the water path is blocked, extending its service life. The filter device 300's receiving cavity 102 replaces the traditional resin cavity and salt cavity, resulting in a smaller overall space occupied by the filter device 300 and facilitating the configuration of other functional components.

[0063] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A filtration device, characterized in that, include: The box assembly (1) is provided with a water inlet (101) and a water outlet (103), and the box assembly (1) is provided with a receiving cavity (102). The water inlet (101), the receiving cavity (102) and the water outlet (103) are connected in sequence to form a main water channel. A filter assembly (2) is disposed on the housing assembly (1) and located in the main water channel. The filter assembly (2) is used to filter the liquid flowing through the main water channel. A valve body assembly (3) is disposed on the housing assembly (1). The valve body assembly (3) is provided with a flow passage (302) or the housing assembly (1) is provided with a flow passage (302). The water inlet (101), the flow passage (302) and the water outlet (103) are arranged in sequence to form a pressure relief water passage. The valve body assembly (3) has at least a first state and a second state. When the valve body assembly (3) is in the first state, the pressure relief water passage is blocked. When the valve body assembly (3) is in the second state, the pressure relief water passage is open.

2. The filtration device according to claim 1, characterized in that, The housing assembly (1) includes a housing body (11) and a cover (12). The housing body (11) is provided with the water inlet (101) and the water outlet (103). The housing body (11) is provided with the receiving cavity (102). The cover (12) is disposed on the housing body (11).

3. The filtration device according to claim 2, characterized in that, The box body (11) is provided with an opening (104) communicating with the receiving cavity (102), and the cover (12) is provided on the box body (11) and covers the opening (104); And / or the cover (12) is detachably disposed on the housing assembly (1); And / or one end of the filter assembly (2) abuts against the housing body (11), and the other end of the filter assembly (2) abuts against the cover (12).

4. The filtration device according to claim 1, characterized in that, The receiving cavity (102) includes a first flow guide cavity (1021) and a second flow guide cavity (1022). The water inlet (101), the first flow guide cavity (1021), the second flow guide cavity (1022) and the water outlet (103) are connected in sequence to form the main water channel. The filter assembly (2) is located between the first flow guide cavity (1021) and the second flow guide cavity (1022).

5. The filtration device according to claim 4, characterized in that, The water inlet (101), the flow passage (302), the second flow guide (1022), and the water outlet (103) are sequentially connected to form the pressure relief water path; And / or the second flow guide cavity (1022) is disposed around the first flow guide cavity (1021); And / or the second flow guide cavity (1022) includes a first cavity (10221) and a second cavity (10222), the number of filter components (2) is two, the first flow guide cavity (1021) is formed between the two filter components (2), one of the two filter components (2) is enclosed with the housing assembly (1) to form the first cavity (10221), the other of the two filter components (2) is enclosed with the housing assembly (1) to form the second cavity (10222), and both the first cavity (10221) and the second cavity (10222) are in communication with the first flow guide cavity (1021); The first cavity (10221) and the second cavity (10222) are connected, and the first cavity (10221) or the second cavity (10222) is connected to the outlet (103); or, there are multiple outlets (103), one of the multiple outlets (103) is connected to the first cavity (10221), and another of the multiple outlets (103) is connected to the second cavity (10222).

6. The filtration device according to claim 4, characterized in that, The valve body assembly (3) is provided with a first notch (301) and a second notch (303). The water inlet (101), the first notch (301), the flow passage (302), the second notch (303), the second flow guide (1022) and the water outlet (103) are sequentially connected to form the pressure relief water passage. When the valve body assembly (3) is in the first state, the first notch (301) and / or the second notch (303) are blocked.

7. The filtration device according to claim 6, characterized in that, The valve body assembly (3) includes a housing (31), an elastic element (32), and a sealing element (33). The housing (31) is disposed on the housing assembly (1). The housing (31) has a first notch (301), a flow cavity (302), and a second notch (303). The elastic element (32) abuts against the housing (31) and the sealing element (33) respectively. When the valve body assembly (3) is in the first state, the sealing element (33) blocks the first notch (301). When the valve body assembly (3) is in the second state, the first notch (301) is open.

8. The filtration device according to claim 7, characterized in that, One end of the elastic member (32) abuts against the side of the housing (31) away from the first notch (301), and the other end of the elastic member (32) abuts against the sealing member (33); And / or the first notch (301) is disposed opposite to the second notch (303); And / or the housing (31) is integrated with the enclosure assembly (1).

9. A waterway system, characterized in that, include: Inlet valve (100); A respirator (200) is connected to the water inlet valve (100); The filtration device (300) as described in any one of claims 1-8, wherein the water inlet (101) of the filtration device (300) is connected to the respirator (200); A water cup assembly (400) is connected to the water outlet (103) of the filter device.

10. A dishwasher, characterized in that, include: The water system as described in claim 9.

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