Dispensing device, and laundry treatment apparatus

Abstract

A dispensing device (1), and a laundry treatment apparatus. The dispensing device (1) comprises: a component body (11), wherein a fluid channel (111) is formed in the component body (11); and a pressure relief assembly (12), wherein the pressure relief assembly (12) comprises: a valve body (121), a valve channel being formed on the valve body (121); and the valve channel, which selectively makes the fluid channel (111) in communication with the outside, wherein a communication channel is further formed on the valve body (121), and the communication channel makes the fluid channel (111) in communication with the outside. During pressure relief by the pressure relief assembly (12), gas can be discharged to the outside through both the valve channel and the communication channel, thereby increasing the gas flow area and reducing the gas flow speed, helping to eliminate howling noise generated during gas discharging, improving the user experience.

Description

Dispensing device and clothing processing equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202323557466.5 filed on December 25, 2023, entitled “Dispensing device and clothing processing equipment,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present invention relates to the technical field of clothing processing equipment, and in particular to a feeding device and clothing processing equipment. Background Art

[0004] At present, washing machines usually add detergent into the washing drum during the washing process to enhance the washing effect on the clothes. The detergent is passed into the washing drum and mixed with the washing water to form detergent, and the clothes are soaked and cleaned. In order to make the detergent fully contact with the clothes, an atomizing nozzle is set at one end of the detergent delivery pipe to atomize the detergent. In order to improve the atomization effect, a structure similar to a venturi tube is set in the detergent delivery pipe to increase the gas content in the detergent in the detergent delivery pipe, thereby increasing the number of bubbles formed by the detergent. However, the venturi tube structure will increase the internal pressure of the detergent delivery pipe. A pressure relief valve needs to be set to protect the detergent delivery pipe to prevent the pipe from being damaged due to excessive pressure. When the pressure relief valve is opened to relieve pressure, the local pressure of the pressure relief valve is too high, and the high-speed flowing gas rubs against the pressure relief valve to produce howling, which affects the user experience.

[0005] Summary of the Invention

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] Therefore, one object of the present invention is to provide a dispensing device that has a good spraying effect on lotion and reduces gas flow rate by increasing the gas passage area during pressure relief, thereby avoiding whistling caused by excessive gas flow rate.

[0008] Another object of the present invention is to provide a clothes processing device having the above-mentioned feeding device.

[0009] The dispensing device according to the present invention includes: a component body, in which a fluid flow path is formed; a pressure relief assembly, which includes: a valve body, on which a valve channel is formed, and the valve channel can selectively connect the fluid flow path with the outside; wherein, a connecting channel is also formed on the valve body, and the connecting channel connects the fluid flow path with the outside.

[0010] According to the dispensing device of the present invention, the detergent spraying efficiency is improved by setting the component body to provide a cleaning effect for clothes, and the fluid flow channel is relieved of pressure by setting a pressure relief component to avoid damage caused by excessive pressure in the fluid flow channel. A valve body is set in the pressure relief component to communicate with the fluid flow channel. When the pressure in the fluid flow channel exceeds a preset value, the high-pressure gas in the fluid flow channel pushes the valve channel to open, thereby connecting the fluid flow channel with the outside through the valve channel, realizing fluid flow channel pressure relief. A connecting channel is also provided on the valve body, and the connecting channel connects the fluid flow channel with the outside. When the pressure relief component relieves pressure, the gas can be discharged to the outside through the valve channel and the connecting channel at the same time, thereby increasing the gas flow area and reducing the gas flow speed, which is conducive to eliminating the whistling noise generated during gas discharge and improving the user experience.

[0011] According to some embodiments of the present invention, the pressure relief assembly further includes: a valve core, which is movably disposed in the valve channel and is adapted to move and open the valve channel after the pressure of the fluid flow channel exceeds a preset value.

[0012] According to some embodiments of the present invention, a pressure relief groove located inside the valve channel is formed on the valve body, and a bottom wall of the pressure relief groove is spaced apart from the valve core to form the communication channel.

[0013] According to some embodiments of the present invention, the depth of the pressure relief groove gradually increases in a direction away from the medium delivery cavity.

[0014] According to some embodiments of the present invention, the pressure relief groove is configured to be a plurality of pressure relief grooves spaced apart in a circumferential direction of the valve channel.

[0015] According to some embodiments of the present invention, the valve channel includes a first channel section and a second channel section that are connected to each other, one end of the first channel section is connected to the medium delivery chamber, one end of the second channel section is connected to the other end of the first channel section, and the other end of the second channel section is connected to the outside; wherein the diameter of the first channel section is smaller than the diameter of the second channel section so as to form a step surface between the first channel section and the second channel section, and the pressure relief groove is arranged on the inner wall of the first channel section and the pressure relief groove extends to the step surface.

[0016] According to some embodiments of the present invention, the diameter of the first channel section gradually increases toward the second channel section.

[0017] According to some embodiments of the present invention, a sealing ring is provided on the outer periphery of the valve core, and the sealing ring is suitable for abutting against the inner wall of the first channel section.

[0018] According to some embodiments of the present invention, the pressure relief valve further includes an elastic member, wherein the elastic member is disposed at an end of the valve core away from the first channel section.

[0019] A laundry treating apparatus according to another embodiment of the present invention will be briefly described below.

[0020] The clothing processing device according to the present invention includes the dispensing device described in the above embodiment, wherein the clothing processing device can be a washing machine, etc. Since the clothing processing device according to the present invention includes the dispensing box described in the above embodiment, the clothing processing device according to the present invention does not generate whistling noise when in use, and the user experience is better.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a front view of a delivery device according to one embodiment of the present invention;

[0023] FIG2 is a top view of a delivery device according to an embodiment of the present invention;

[0024] FIG3 is a cross-sectional view according to AA in FIG2 ;

[0025] FIG4 is a partial enlarged view of circle a in FIG3 ;

[0026] FIG5 is a schematic diagram of the assembly of a pressure relief assembly according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Delivery device 1;

[0029] Component body 11, fluid flow channel 111; pressure relief assembly 12, valve body 121, valve core 122; pressure relief groove 13; first channel section 141, second channel section 142, step surface 143; sealing ring 15; elastic member 16; delivery box 20, valve mounting hole 201. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0031] The following describes a delivery device 1 according to an embodiment of the present invention with reference to FIG1 to FIG5 .

[0032] As shown in Figures 1 to 5, the dispensing device 1 according to the present invention includes a component body 11 and a pressure relief assembly 12, a fluid flow channel 111 is formed in the component body 11, and the pressure relief assembly 12 includes a valve body 121, a valve channel is formed on the valve body 121, and the valve channel can selectively connect the fluid flow channel 111 with the outside; wherein, a connecting channel is formed on the valve body 121, and the connecting channel can selectively connect the fluid flow channel 111 with the outside.

[0033] Specifically, the component body 11 is generally arranged in the clothing processing chamber inside the drum washing machine. The component body 11 can realize the addition of liquid detergent or solid detergent into the clothing processing chamber, and a fluid flow channel 111 is formed inside the component body 11. The detergent for washing clothes circulates in the fluid flow channel 111 and can be sprayed onto the clothes through structures such as nozzles. In order to improve the spraying effect of the component body 11 for the detergent, a structure similar to a Venturi tube is provided in the fluid flow channel 111 and can produce a Venturi effect accordingly, thereby increasing the number of bubbles sprayed by the component body 11 and increasing the contact area between the detergent and the clothes, thereby improving the clothing washing effect. However, the Venturi structure will cause excessive local pressure in the fluid flow channel 111, causing damage to the fluid flow channel 111. Therefore, a pressure relief component 12 is provided in the present application to relieve pressure in the fluid flow channel 111 to avoid excessive pressure in the fluid flow channel 111.

[0034] Among them, a valve channel is formed on the valve body 121, one end of the valve channel is connected to the fluid flow channel 111, and the other end of the valve channel is connected to the outside world. When the pressure in the fluid flow channel 111 is below the preset value, the valve channel is in a closed state. When the pressure in the fluid flow channel 111 exceeds the preset value, the high-pressure gas in the fluid flow channel 111 pushes the valve body 121 to open the valve channel to discharge the high-pressure gas in the fluid flow channel 111, thereby avoiding damage to the component body 11 caused by excessive pressure in the fluid flow channel 111.

[0035] A connecting channel is formed on the valve body 121, one end of the connecting channel is connected to the fluid flow channel 111, and the other end of the connecting channel is connected to the outside. After the valve body 121 is opened, the connecting channel connects the fluid flow channel 111 with the outside, thereby discharging the high-pressure gas in the fluid flow channel 111, thereby achieving pressure relief of the fluid flow channel 111. The connecting channel can be arranged on the valve body 121 and spaced apart from the valve channel. One end of the connecting channel is connected to the fluid flow channel 111, and the other end of the connecting channel is connected to the outside, thereby connecting the fluid flow channel 111 with the outside through the connecting channel. When the pressure in the fluid flow channel 111 exceeds a preset value, the high-pressure gas in the fluid flow channel 111 can be discharged to the outside through the valve channel and the connecting channel, thereby increasing the gas flow area, which is conducive to reducing the gas circulation speed, thereby eliminating the whistling noise generated by gas pressure relief and improving user experience.

[0036] According to the dispensing device 1 of the present invention, the efficiency of detergent spraying is improved by setting the component body 11 to provide a cleaning effect for clothes, and the pressure relief component 12 is set to relieve the pressure of the fluid flow channel 111 to avoid damage caused by excessive pressure in the fluid flow channel 111. A valve body 121 is set in the pressure relief component 12 to communicate with the fluid flow channel 111. When the pressure in the fluid flow channel 111 exceeds a preset value, the high-pressure gas in the fluid flow channel 111 pushes the valve channel to open, thereby connecting the fluid flow channel 111 with the outside through the valve channel, thereby achieving pressure relief of the fluid flow channel 111. A connecting channel is also provided on the valve body 121, and the connecting channel connects the fluid flow channel 111 with the outside. When the pressure relief component 12 relieves pressure, the gas can be discharged to the outside through the valve channel and the connecting channel at the same time, thereby increasing the gas flow area and reducing the gas flow speed, which is conducive to eliminating the whistling noise generated during gas discharge and improving the user experience.

[0037] According to some embodiments of the present invention, the pressure relief assembly 12 further includes a valve core 122 movably disposed in the valve channel and adapted to move and open the valve channel after the pressure of the fluid flow channel 111 exceeds a preset value.

[0038] Specifically, a valve channel for accommodating a valve core 122 is formed on the valve body 121, one end of the valve channel is connected to the fluid flow channel 111, and the other end of the valve channel is connected to the outside world. When the pressure in the fluid flow channel 111 is below a preset value, the valve core 122 is fixed at the connection between the valve channel and the fluid flow channel 111 and closes the valve channel. When the pressure in the fluid flow channel 111 exceeds the preset value, the high-pressure gas in the fluid flow channel 111 pushes the valve core 122 to move along the extension direction of the valve channel and opens the valve channel to discharge the high-pressure gas in the fluid flow channel 111, thereby avoiding damage to the cavity of the component body 11 caused by excessive pressure in the fluid flow channel 111.

[0039] According to some embodiments of the present invention, a pressure relief groove 13 is formed on the valve body 121 and is located inside the valve channel. The bottom wall of the pressure relief groove 13 is spaced from the valve core 122 to form a communication channel.

[0040] As shown in Figure 4, the pressure relief groove 13 is arranged on the inner wall of the valve channel and on the outer periphery of the valve core 122. The pressure relief groove 13 and the valve core 122 are spaced apart to facilitate the high-pressure gas to push the valve core 122 open, thereby connecting the fluid flow channel 111 with the connecting channel. The pressure relief groove 13 has a simple structure. After the high-pressure gas in the fluid flow channel 111 enters the connecting channel, the gas flow area is increased and the gas flow rate is reduced, thereby eliminating the whistling noise generated by gas discharge and improving the user experience.

[0041] According to some embodiments of the present invention, the depth of the pressure relief groove 13 gradually increases in a direction away from the component body 11 .

[0042] Specifically, the pressure relief groove 13 is arranged at an angle relative to the extension direction of the valve channel, and the bottom wall of the pressure relief groove 13 forms a guiding slope, which extends in the direction away from the fluid flow channel 111. When the high-pressure gas in the fluid flow channel 111 pushes the valve core 122 open and is discharged from the connecting channel through the pressure relief groove 13, the depth of the pressure relief groove 13 gradually increases in the direction away from the fluid flow channel 111, and the flow area of ​​the high-pressure gas when passing through the pressure relief groove 13 increases. Under the condition of the same gas flow rate, the smaller the gas flow area, the greater the gas flow speed, and the easier it is for the gas to rub against the valve body 121 and produce howling when discharged. Through the above arrangement, the gas flow area is increased, which is conducive to reducing the gas flow speed, so as to eliminate the howling caused by high-speed gas circulation and improve the user experience.

[0043] According to some embodiments of the present invention, a plurality of pressure relief grooves 13 are spaced apart in the circumferential direction of the valve channel.

[0044] Specifically, multiple pressure relief grooves 13 are arranged at intervals in the circumferential direction of the valve channel, and the arrangement of the pressure relief grooves 13 is more uniform. When the gas is depressurized, it is discharged through multiple pressure relief grooves 13, and the gas is discharged evenly, avoiding the situation of excessive local pressure during the pressure relief process, ensuring that the gas pressure relief is more stable. In addition, by arranging multiple pressure relief grooves 13 at intervals in the circumferential direction of the valve channel, the gas flow area can be increased, the gas flow rate during pressure relief can be further reduced, and the whistling noise caused by high-speed gas flow can be eliminated.

[0045] According to some embodiments of the present invention, the valve channel includes a first channel section 141 and a second channel section 142 that are connected to each other, one end of the first channel section 141 is connected to the fluid flow channel 111, one end of the second channel section 142 is connected to the other end of the first channel section 141, and the other end of the second channel section 142 is connected to the outside; wherein the diameter of the first channel section 141 is smaller than the diameter of the second channel section 142 so that a step surface 143 is formed between the first channel section 141 and the second channel section 142, and the pressure relief groove 13 is arranged on the inner wall of the first channel section 141 and the pressure relief groove 13 extends to the step surface 143.

[0046] Specifically, one end of the first channel section 141 is connected to the fluid flow channel 111, and the gas discharged from the fluid flow channel 111 preferentially flows through the first channel section 141. A plurality of pressure relief grooves 13 are arranged at intervals on the circumference of the inner wall of the first channel section 141. In the process of the gas passing through the first channel section 141, the plurality of pressure relief grooves 13 guide the gas and increase the gas flow area, thereby reducing the gas flow rate; one end of the second channel section 142 is connected to the first channel section 141, and the other end of the second channel section 142 is connected to the outside. The gas after being guided by the pressure relief grooves 13 flows into the second channel section 142 and is discharged to the outside through the second channel section 142, wherein The diameter of the second channel section 142 is greater than that of the first channel section 141, which further increases the flow area of ​​the gas, improves the gas deceleration effect, and eliminates the whistling noise generated by the gas. A step surface 143 is formed between the first channel section 141 and the second channel section 142, and at least part of the circumferential edge of the valve core 122 stops against the step surface 143. When the pressure in the fluid flow channel 111 is below the preset value, the circumferential edge of the valve core 122 stops against the step surface 143, and the step surface 143 supports the valve core 122. Through the cooperation between the valve core 122 and the step surface 143, the first channel section 141 can be sealed.

[0047] According to some embodiments of the present invention, the diameter of the first channel section 141 gradually increases toward the second channel section 142 .

[0048] As shown in Figure 4, the peripheral wall of the first channel section 141 is inclined toward the second channel section 142, and the wall thickness of the first channel section 141 gradually decreases in the direction away from the fluid flow channel 111, so that when the gas discharged from the fluid flow channel 111 passes through the first channel section 141, the area of ​​gas circulation gradually increases, which is beneficial to improving the pressure relief efficiency. In addition, since the gas circulation area is large, it is beneficial to reduce the gas flow rate and eliminate the whistling noise generated by the gas circulation.

[0049] According to some embodiments of the present invention, a sealing ring 15 is sleeved on the outer periphery of the valve core 122 , and the sealing ring 15 is suitable for abutting against the inner wall of the first channel section 141 .

[0050] Specifically, when the pressure in the fluid flow channel 111 is lower than a preset value, at least part of the outer peripheral edge of the valve core 122 abuts against the step surface 143, and the sealing ring 15 is squeezed under the weight of the valve core 122 and abuts against the inner wall of the first channel section 141. The circumferential sides of the sealing ring 15 respectively abut against the inner walls of the valve core 122 and the first channel section 141 to seal the first channel section 141. Since the fluid flow channel 111 is connected to the first channel section 141, the sealing ring 15 seals the first channel section 141, thereby ensuring the sealing of the fluid flow channel 111 and avoiding air leakage when the medium is added, which affects the addition efficiency.

[0051] According to some embodiments of the present invention, the pressure relief valve 1 further includes an elastic member 16 , which is disposed at an end of the valve core 122 away from the first channel section 141 .

[0052] Specifically, a mounting groove may be formed at one end of the valve core 122 away from the fluid flow channel 111, a connecting column is provided in the mounting groove, an elastic member 16 is sleeved on the outer periphery of the connecting column and is provided in the mounting groove, one end of the elastic member 16 is connected to one end of the valve core 122 away from the first channel section 141, an end cover may be provided at one end of the valve channel away from the fluid flow channel 111, and the other end of the elastic member 16 may be connected to the end cover. When the pressure in the fluid flow channel 111 is below a preset value, the valve core 122 is pushed to squeeze the seal under the elastic action of the elastic member 16 and the influence of the gravity of the valve core 122 itself. The sealing ring 15 abuts against the peripheral wall of the first channel section 141 to close the first channel section 141; when the pressure in the fluid flow channel 111 is higher than a preset value, the high-pressure gas in the medium accommodating chamber pushes the valve core 122 to move away from the fluid flow channel 111 along the extension direction of the valve channel to connect the fluid flow channel 111 with the outside, and the high-pressure gas is discharged to the outside through the first channel section 141 and the second channel section 142 in sequence. When the high-pressure gas is depressurized, the valve core 122 is reset under the action of the elastic member 16 and its own gravity, and the first channel section 141 is sealed again to ensure the efficiency of medium delivery.

[0053] In summary, the dispensing device 1 according to the present invention includes a component body 11, a fluid flow channel 111 is formed in the component body 11, and the detergent for washing clothes circulates in the fluid flow channel 111 and is sprayed onto the clothes through the component body 11, thereby improving the cleaning effect of the clothes. In order to avoid excessive pressure in the fluid flow channel 111, a pressure relief component 12 is provided to relieve the pressure of the fluid flow channel 111, and a valve channel is formed in the valve body 121. The valve core 122 is movably provided in the valve channel, and the valve channel is connected to the fluid flow channel 111. When the pressure in the fluid flow channel 111 exceeds a preset value, the high-pressure gas in the fluid flow channel 111 pushes the valve core 122 to move and connects the fluid flow channel 111 to the outside. , the gas is discharged from the valve channel, and a connecting channel is also formed on the valve body 121, which connects the fluid flow channel 111 with the outside. When the gas is depressurized, the discharged gas can be discharged through the valve channel and the connecting channel to increase the gas flow area, thereby reducing the gas flow rate and eliminating the whistling caused by gas discharge; a pressure relief groove 13 is provided in the valve channel, and the depth of the pressure relief groove 13 gradually increases in the direction away from the fluid flow channel 111, and the pressure relief groove 13 is constructed to be a plurality of spaced apart arrangements in the circumferential direction of the valve channel to increase the gas flow area. Under the condition of the same flow rate, the gas flow area is larger and the flow rate is smaller, which is conducive to eliminating the whistling noise generated by the gas and improving the user experience.

[0054] Among them, the valve channel includes a first channel section 141 and a second channel section 142 which are connected to each other. A pressure relief groove 13 is provided in the first channel section 141. The diameter of the first channel section 141 is smaller than the diameter of the second channel section 142, which further increases the gas flow area and is conducive to eliminating the howling caused by gas discharge. A sealing ring 15 is provided on the outer periphery of the valve core 122 to ensure the sealing of the first channel section 141; an elastic member 16 is provided at the end of the valve core 122 away from the first channel section 141 to push the valve core 122 to reset after the pressure relief is completed.

[0055] The clothes treating apparatus according to the present invention will be briefly described below.

[0056] The clothing processing device according to the present invention includes the delivery box 20 described in the above embodiment, wherein the clothing processing device can be a washing machine, etc. Since the clothing processing device according to the present invention includes the delivery box 20 described in the above embodiment, the clothing processing device according to the present invention does not generate whistling noise when in use, and the user experience is better.

[0057] The clothing processing device of the present application also includes a delivery box, which is formed with a medium delivery chamber and a valve mounting hole connected to the medium delivery chamber. The valve body 121 is arranged in the valve mounting hole, and detergent is stored in the medium delivery chamber. The medium delivery chamber is connected to the component body 11 through a fluid flow channel 111. The detergent flows to the component body 11 through the fluid flow channel 111 and is sprayed onto the clothes.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0060] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A dispensing device, characterized in that, Comprising: A component body, within which a fluid flow passage is formed; A pressure relief assembly, the pressure relief assembly comprising: A valve body, on which a valve passage is formed, and the valve passage selectively communicates the fluid flow passage with the outside; wherein, A communication passage is further formed on the valve body, and the communication passage communicates the fluid flow passage with the outside.

2. The dispensing device according to claim 1, wherein The pressure relief assembly further comprises: A valve core, which is movably arranged in the valve passage and is adapted to move and open the valve passage after the pressure in the fluid flow passage exceeds a preset value.

3. The dispensing device according to claim 2, characterized in that, A pressure relief groove is formed on the valve body inside the valve passage, and a space is formed between the bottom wall of the pressure relief groove and the valve core to form the communication passage.

4. The dispensing device according to claim 3, characterized in that, The depth of the pressure relief groove gradually increases in the direction away from the fluid flow passage.

5. The dispensing device according to claim 4, wherein The pressure relief grooves are configured to be multiple and are spaced circumferentially of the valve passage.

6. The dispensing device according to claim 5, characterized in that, The valve passage comprises a first passage section and a second passage section that communicate with each other. One end of the first passage section communicates with the fluid flow passage, the other end of the first passage section is connected to one end of the second passage section, and the other end of the second passage section communicates with the outside; wherein The diameter of the first passage section is smaller than that of the second passage section to form a step surface between the first passage section and the second passage section, and the pressure relief groove is arranged on the inner wall of the first passage section and extends to the step surface.

7. The dispensing device according to claim 6, characterized in that, The diameter of the first passage section gradually increases towards the second passage section.

8. The dispensing device according to claim 7, characterized in that, A sealing ring is sleeved on the outer periphery of the valve core, and the sealing ring is adapted to abut against the inner wall of the first passage section.

9. The dispensing device according to claim 8, characterized in that Further comprising: An elastic member, which is arranged at the end of the valve core away from the first passage section.

10. A laundry treatment device, characterized in that, Including the dispensing device according to claims 1-9.

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