Water pump and dish washing machine
The wash pump design with a venting channel stabilizes operation, reduces noise, and prevents overheating by efficiently expelling trapped air, improving washer performance.
Patent Information
- Application Number
- CN202410059881.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2025-07-15
AI Technical Summary
The washing pump in the dishwasher is prone to gas trapping, which affects the performance of the use.
The exhaust passage is provided in the pump housing so that the gas in the top space of the pump chamber can be discharged into the outlet passage through the exhaust passage, avoiding gas accumulation, and a smooth wall surface and reasonable passage design are adopted to improve exhaust efficiency and reduce noise.
It stabilizes the operating power of the water pump, reduces operating noise, and avoids the occurrence of dry burning of the heating pipe.
Smart Images
Figure CN120304754A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of dishwashers, and in particular, to a water pump and a dishwasher using the water pump. Background Art
[0002] A dishwasher is a device for automatically cleaning tableware such as bowls, chopsticks, plates, dishes, knives, forks, etc. Currently, the most commonly used is the spray-type dishwasher. When the dishwasher is working, water enters the water cup through the water inlet pipe. After reaching a certain water volume, the washing pump sucks water from the water cup, pressurizes the water, and the pressurized water enters the spray arm from the water outlet of the washing pump to clean the tableware. Therefore, the performance of the washing pump has an important impact on the overall performance of the dishwasher.
[0003] In the related art, a dishwasher includes a water cup, a washing pump, and a spray arm. The washing pump has a pump housing, and the pump housing includes a pump housing main body and a water outlet part connected together. The pump housing main body is formed with a water inlet and a pump chamber, and a water outlet channel is formed in the water outlet part. One end of the water outlet channel is formed as an in-chamber inlet communicating with the pump chamber, and the other end of the water outlet channel is formed as a water outlet. The water inlet is connected to the water cup through a water inlet pipe, and the water outlet is connected to the spray arm through a water outlet pipe. Among them, there are generally two setting methods for the water outlet part. One is that the water outlet part is arranged at the top position of the pump housing, and the orientation of the water outlet is along the tangent direction of the top of the pump housing. The other is that the water outlet part is arranged on the side of the pump housing, and the in-chamber inlet is arranged below the top wall of the pump chamber.
[0004] However, when the setting method of the water outlet part is the latter, air entrapment is likely to occur in the washing pump, which will affect the performance of the washing pump and further affect the performance of the dishwasher. Summary of the Invention
[0005] The embodiments of the present application provide a water pump and a dishwasher, which are used to solve the problem of air entrapment easily occurring in the washing pump in the related art.
[0006] On the one hand, the present application provides a water pump, which includes a pump housing. The pump housing includes a pump housing main body and a water outlet part connected together; the pump housing main body is formed with a pump chamber and a water inlet communicating with the pump chamber. A water outlet channel is formed in the water outlet part. One end of the water outlet channel is formed as an in-chamber inlet communicating with the pump chamber, and the other end of the water outlet channel is formed as a water outlet. And the in-chamber inlet is located below the top wall of the pump chamber; the pump housing is also provided with an exhaust channel extending from the pump housing main body to the water outlet part, and the exhaust channel communicates the top space of the pump chamber and the water outlet channel.
[0007] As an optional implementation manner, the pump housing further includes a connecting part, and both ends of the connecting part are respectively connected to the pump housing main body and the water outlet part; the housing wall of the pump housing main body, the housing wall of the water outlet part, and the connecting part define the exhaust channel together. In this way, the above-mentioned exhaust channel can be formed so that the gas located in the top space of the pump chamber can be discharged into the water outlet channel through the exhaust channel.
[0008] As an alternative embodiment, the exhaust passage extends in the horizontal direction. In this way, the path for the gas to be discharged from the top space into the water outlet passage is shorter, that is to say, the time required for the gas in the top space to be discharged into the water outlet passage is shorter, so that the gas in the top space can be quickly discharged. On the one hand, the operating power of the water pump is relatively stable. On the other hand, the noise generated during the operation of the water pump can be reduced. Moreover, it can to a certain extent prevent a large amount of gas from adhering to the surface of the heating pipe, so as to avoid the phenomenon of dry burning of the heating pipe to a certain extent.
[0009] As an alternative embodiment, the wall of the pump chamber further includes a chamber side wall connected to the periphery of the chamber top wall; the chamber top wall and the chamber side wall located at the top define a top space, and the exhaust passage penetrates the chamber side wall that defines the top space. In this way, the gas in the top space can be discharged into the water outlet passage through the exhaust passage.
[0010] As an alternative embodiment, the wall surface of the chamber side wall that defines the top space is a smooth wall surface. In this way, even when the exhaust passage and the top space are indirectly connected, the frictional force generated between the second chamber side wall and the gas is small, so that the resistance of the gas flowing through the second chamber side wall is small. On the one hand, the exhaust efficiency can be improved. On the other hand, the noise generated during the gas flow process is reduced.
[0011] As an alternative embodiment, the exhaust passage is an exhaust hole. That is to say, one end of the exhaust hole penetrates the second chamber side wall and communicates with the top space, and the other end of the exhaust hole penetrates the shell wall of the water outlet part and communicates with the water outlet passage. In this way, the gas in the top space can be discharged into the water outlet passage through the exhaust hole.
[0012] As an alternative embodiment, the wall of the exhaust hole is connected to the chamber top wall. In this way, there is no other transition wall surface between the wall surface of the chamber top wall and the wall surface of the wall of the exhaust hole. In this way, the gas in the top space can be quickly discharged into the exhaust hole to improve the exhaust efficiency and further avoid the phenomenon of trapped air inside the pump chamber to a certain extent.
[0013] As an alternative embodiment, the wall of the exhaust hole is a smooth wall surface. That is to say, there are neither protrusions nor pits on the wall of the exhaust hole. In this way, the frictional force generated between the air flow and the wall of the exhaust hole is small, so that the resistance of the air flow flowing in the exhaust hole can be reduced, so as to improve the discharge efficiency of the gas and at the same time reduce the noise generated during the gas flow process.
[0014] As an alternative embodiment, the exhaust passage is an exhaust groove, the notch of the exhaust groove communicates with the cavity inlet, and the bottom of the exhaust groove extends towards the top wall of the cavity. In this way, the gas in the top space inside the pump can be discharged into the water outlet passage through the exhaust groove to discharge the gas in the top space.
[0015] As an alternative embodiment, in the direction from top to bottom, the opening size of the exhaust groove gradually increases. In this way, compared with the case where the opening size of the exhaust port of the exhaust groove gradually decreases or remains unchanged in the direction from top to bottom, through the above setting, in the extending direction of the exhaust groove, the longitudinal sectional area of the exhaust groove is larger, so that the gas flow rate passing through the exhaust groove per unit time will be more. Thus, the gas discharge efficiency will be improved, and to a certain extent, the phenomenon of air entrapment in the pump cavity can be avoided.
[0016] As an alternative embodiment, the bottom wall of the exhaust groove is a smooth wall surface. In this way, the frictional force exerted by the bottom wall of the exhaust groove on the air flow will be reduced, and the resistance suffered by the air flow in the exhaust groove will be smaller.
[0017] As an alternative embodiment, the bottom of the exhaust groove is located below the top wall of the cavity, and the height difference between the bottom of the exhaust groove and the top wall of the cavity is within 5 millimeters. In this way, by restricting the range of the height difference between the bottom of the exhaust groove and the top wall of the cavity, although there is a height difference between the bottom of the exhaust groove and the top wall of the cavity, it still does not affect the gas in the top space to be discharged into the water outlet passage through the exhaust groove.
[0018] As an alternative embodiment, the top wall of the cavity is a plane. In this way, when the gas flows in the top space, the resistance suffered by the gas during the flow can be reduced to improve the exhaust efficiency.
[0019] As an alternative embodiment, the water pump provided in the present application further includes an impeller and a heating pipe disposed in the pump cavity. The heating pipe is located at the middle position of the pump cavity in the axial direction of the impeller; the cavity side wall includes two first cavity side walls oppositely disposed in the axial direction of the impeller and two second cavity side walls oppositely disposed in the radial direction of the impeller; wherein, one of the first cavity side walls is provided with a water inlet, and the exhaust passage is disposed at the corner formed by the first cavity side wall having the water inlet and the second cavity side wall connected to the first cavity side wall.
[0020] On the other hand, the present application provides a dishwasher, including a water cup, the above-mentioned water pump, and a spray arm. The water inlet is communicated with the water cup through a water inlet pipe, and the water outlet is communicated with the spray arm through a water outlet pipe; wherein, the water pump is a washing pump.
[0021] As an alternative embodiment, the dishwasher provided in the present application further includes a control unit, which is configured to, after the dishwasher is powered on, control the motor of the water pump to perform start-up and stop operations for a preset number of times, so that the gas in the pump chamber flows into the water outlet channel through the exhaust channel.
[0022] In the indoor unit and the air duct unit provided in the embodiments of the present application, by providing an exhaust channel that connects the top space of the pump chamber and the water outlet channel, the gas accumulated in the top space can be discharged into the water outlet channel through the exhaust channel, and then discharged into the washing chamber through the water outlet, the water outlet pipe and the spray arm in the dishwasher. In this way, the operating power of the water pump is relatively stable, and the noise generated by the water pump during operation is reduced. In addition, it can also prevent a large amount of gas from adhering to the surface of the heating pipe to a certain extent, so as to avoid the phenomenon of dry burning of the heating pipe to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 It is a schematic structural diagram of the pump housing in the water pump provided in the embodiment of the present application;
[0025] Figure 2 It is another schematic structural diagram of the pump housing in the water pump provided in the embodiment of the present application;
[0026] Figure 3 For Figure 1 the three-dimensional structural schematic diagram;
[0027] Figure 4 For Figure 2 the three-dimensional structural schematic diagram;
[0028] Figure 5 It is a cross-sectional view of the dishwasher provided in the embodiment of the present application;
[0029] Figure 6 For Figure 5 the enlarged schematic diagram of the partial structure at A in
[0030] Figure 7 For Figure 1 the structural schematic diagram in another direction;
[0031] Figure 8 For Figure 7 the cross-sectional view along the B-B direction;
[0032] Figure 9 is Figure 2 a schematic structural view in another direction;
[0033] Figure 10 is Figure 9 a sectional view along the C-C direction;
[0034] Figure 11 is Figure 3 an enlarged schematic view of the partial structure at D in;
[0035] Figure 12 is Figure 4 an enlarged schematic view of the partial structure at E in.
[0036] Explanation of reference numerals in the drawings:
[0037] 1, pump housing; 2, inlet pipe; 3, water cup; 4, outlet pipe; 5, washing chamber; 6, exhaust passage;
[0038] 11, main body of the pump housing; 12, water outlet part; 13, connecting part;
[0039] 111, pump chamber; 112, water inlet; 121, water outlet passage;
[0040] 1111, top wall of the chamber; 1112, side wall of the chamber; 1113, first side wall of the chamber; 1114, second side wall of the chamber; 1211, inlet in the chamber; 1212, water outlet. Detailed implementation manners
[0041] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the drawings.
[0042] When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are merely examples of the devices and methods that are consistent with some aspects of the present application as detailed in the appended claims.
[0043] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more.
[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0045] In the related art, a dishwasher includes a water cup, a washing pump, and a spray arm. The washing pump has a pump housing, and the pump housing includes a pump housing main body and a water outlet part connected together. The pump housing main body is formed with a water inlet and a pump chamber, and a water outlet channel is formed in the water outlet part. One end of the water outlet channel is formed as an in-chamber inlet communicating with the pump chamber, and the other end of the water outlet channel is formed as a water outlet. The water inlet is communicated with the water cup through a water inlet pipe, and the water outlet is communicated with the spray arm through a water outlet pipe. Among them, there are generally two setting methods for the water outlet part. One is that the water outlet part is arranged at the top position of the pump housing, and the orientation of the water outlet is along the tangent direction of the top of the pump housing. The other is that the water outlet part is arranged on the side of the pump housing, and the in-chamber inlet is arranged below the top wall of the pump chamber. However, when the setting method of the water outlet part is the latter, air entrapment is likely to occur in the washing pump, which will affect the use performance of the washing pump and further affect the use performance of the dishwasher.
[0046] Therefore, this embodiment provides a water pump and a dishwasher, which can solve the problem of air entrapment in the dishwasher in the related art, so that the dishwasher provided by this embodiment has better use performance.
[0047] It should be noted that when the water pump provided by this embodiment is applied to a dishwasher, the water pump should be a washing pump, and the above water pump can also be applied to electrical products such as dehumidifiers and humidifiers. Here, the type of water pump applied to other electrical products is not limited.
[0048] The following will introduce this embodiment in detail in combination with the drawings and specific embodiments.
[0049] Please refer to Figures 1 to 4 , Figure 1 which is a schematic structural diagram of the pump housing in the water pump provided by the embodiment of the present application, Figure 2 which is another schematic structural diagram of the pump housing in the water pump provided by the embodiment of the present application, Figure 3 is Figure 1 a three-dimensional structural diagram of Figure 4 is Figure 2 a three-dimensional structural diagram of Figures 1 to 4As shown in the figure, a water pump includes a pump housing 1. The pump housing 1 includes a pump housing main body 11 and a water outlet part 12 connected together. The pump housing main body 11 forms a pump chamber 111 and a water inlet 112 communicating with the pump chamber 111. A water outlet channel 121 is formed in the water outlet part 12. One end of the water outlet channel 121 is formed as a cavity inlet 1211 communicating with the pump chamber 111, and the other end of the water outlet channel 121 is formed as a water outlet 1212. And the cavity inlet 1211 is located below the cavity top wall 1111 of the pump chamber 111.
[0050] Please continue to refer to Figure 5 and Figure 6 , Figure 5 which is a cross-sectional view of the dishwasher provided by the embodiment of the present application, Figure 6 is Figure 5 a schematic enlarged view of the local structure at A in
[0051] Generally, in order to improve the structural compactness inside the dishwasher, a heating pipe (not shown in the figure) for heating water is arranged in the pump chamber 111. The heating pipe is located in the middle of the pump chamber 111 in the axial direction of the impeller, and this should be the best position for the water outlet part 12. Therefore, in order to avoid the heating pipe, the water outlet part 12 is arranged at other positions.
[0052] Specifically, the cavity side wall 1112 includes two first cavity side walls 1113 oppositely arranged in the axial direction of the impeller and two second cavity side walls 1114 oppositely arranged in the radial direction of the impeller. Among them, one first cavity side wall 1113 is provided with the water inlet 112, and the water outlet part 12 is connected to the side of the pump housing main body 11 close to the water inlet 112. In this way, it can not only avoid the heating pipe, but also meet the appropriate distance between the water outlet 1212 and the impeller in the axial direction of the impeller, so that the water flow characteristics in the pump chamber 111 are better. The water flow characteristics can be the resistance received by the water during the flow process and the flow velocity of the water flow, etc.
[0053] It can be understood that during the washing process of the dishwasher, that is, during the operation of the water pump, the water entering the pump chamber 111 through the water inlet pipe 2 may carry gas. Due to the flow characteristics of the gas, the gas will accumulate in the top space of the pump chamber 111. If the gas accumulates in the top space for a long time, on the one hand, in the case of coexistence of gas and liquid, the operating power of the water pump is unstable, which will increase the operating power of the water pump; on the other hand, when gas and liquid coexist, the water will collide with the gas during the flowing process, resulting in relatively large noise; moreover, when there is more gas rather than water attached to the surface of the heating tube, it may cause the heating tube to dry burn.
[0054] Please continue to refer to Figures 7 to 10 , Figure 7 For Figure 1 a schematic structural view in another direction, Figure 8 For Figure 7 a sectional view taken along the B-B direction, Figure 9 For Figure 2 a schematic structural view in another direction, Figure 10 For Figure 9 a sectional view taken along the C-C direction. Therefore, in order to avoid the occurrence of the above phenomena, an exhaust passage 6 extending from the pump housing main body 11 to the water outlet part 12 can be provided, and the exhaust passage 6 communicates with the top space of the pump chamber 111 and the water outlet passage 121. In this way, the gas accumulated in the top space can be discharged into the water outlet passage 121 through the exhaust passage 6, and then discharged into the washing chamber 5 through the water outlet pipe 4 and the spray arm. In this way, the operating power of the water pump is relatively stable, and the noise generated during the operation of the water pump is reduced. In addition, it can also avoid the phenomenon of dry burning of the heating tube to a certain extent.
[0055] Among them, the top wall 1111 of the chamber and the side wall 1112 of the chamber located at the top define the above-mentioned top space.
[0056] It should be noted that when the water outlet part 12 is connected to the side of the pump housing main body 11 close to the water inlet 112, the exhaust passage 6 is provided at the corner formed by the first side wall 1113 with the water inlet 112 and the second side wall 1114 connected to the first side wall 1113. In this way, on the premise of meeting the installation position of the water outlet part 12, the exhaust passage 6 is set so that the gas in the top space can be discharged into the water outlet passage 121 through the exhaust passage 6.
[0057] In order to form the above-mentioned exhaust passage 6, the pump housing 1 may further include a connecting portion 13. The two ends of the connecting portion 13 are respectively connected to the pump housing main body 11 and the water outlet portion 12. The housing wall of the pump housing main body 11, the housing wall of the water outlet portion 12, and the connecting portion 13 define the exhaust passage 6 together. In this way, the above-mentioned exhaust passage 6 can be formed so that the gas in the top space of the pump chamber 111 can be discharged into the water outlet passage 121 through the exhaust passage 6, and then discharged into the washing chamber 5 through the water outlet 1212, the water outlet pipe 4, and the spray arm.
[0058] It can be understood that when the exhaust passage 6 extends in a direction with a certain angle to the horizontal direction, that is, when the exhaust passage 6 extends in an inclined direction, compared with when the exhaust passage 6 extends in the horizontal direction, the path of the gas in the exhaust passage 6 will be longer, which will prolong the exhaust time and reduce the exhaust efficiency.
[0059] Therefore, in this embodiment, the exhaust passage 6 extends in the horizontal direction. In this way, the path for the gas to be discharged from the top space into the water outlet passage 121 is shorter. That is to say, the time required for the gas in the top space to be discharged into the water outlet passage 121 is shorter, so that the gas in the top space can be quickly discharged. On the one hand, the operating power of the water pump is relatively stable. On the other hand, the noise generated during the operation of the water pump can be reduced. Moreover, it can avoid a large amount of gas adhering to the surface of the heating pipe to a certain extent, so as to avoid the phenomenon of dry burning of the heating pipe to a certain extent.
[0060] Since the top space is formed by enclosing the top wall 1111 and a part of the side wall 1112 at the top, in order to enable the gas in the top space to be discharged into the water outlet passage 121 through the exhaust passage 6, the exhaust passage 6 needs to penetrate the side wall 1112 of the cavity that defines the top space. Specifically, the exhaust passage 6 needs to penetrate the second side wall 1114 close to the water outlet portion 12. In this way, the gas in the top space can be discharged into the water outlet passage 121 through the exhaust passage 6 and then discharged into the washing chamber 5.
[0061] When the exhaust passage 6 penetrates through the cavity side wall 1112 that defines the top space, that is, when the exhaust passage 6 penetrates through the second cavity side wall 1114, the exhaust passage 6 and the top space may be directly connected or indirectly connected. When the exhaust passage 6 is directly connected to the top space, the gas in the top space will directly flow into the exhaust passage 6, and the gas will not flow over the second cavity side wall 1114. When the exhaust passage 6 is indirectly connected to the top space, the gas in the top space will not directly flow into the exhaust passage. That is to say, the gas in the top space will first flow over the second cavity side wall 1114 and then flow into the exhaust passage 6. When the gas flows over the second cavity side wall 1114, it will inevitably be affected by the frictional force generated by the second cavity side wall 1114, thereby generating a certain resistance to the flow of the gas. Therefore, when the frictional force generated by the second cavity side wall 1114 on the gas is small, the resistance when the gas flows over the second cavity side wall 1114 will be reduced.
[0062] Thus, in this embodiment, the wall surface of the second cavity side wall 1114 is a smooth wall surface. In this way, even when the exhaust passage 6 and the top space are indirectly connected, the frictional force generated between the second cavity side wall 1114 and the gas is also small, making the resistance when the gas flows over the second cavity side wall 1114 small. On the one hand, the exhaust efficiency can be improved, and on the other hand, the noise generated during the gas flow is reduced.
[0063] Please continue to refer to Figure 11 , Figure 11 is Figure 3 a schematic enlarged view of the local structure at D in. In some alternative embodiments, the exhaust passage 6 may be an exhaust hole. That is to say, one end of the exhaust hole penetrates through the second cavity side wall 1114 and is connected to the top space, and the other end of the exhaust hole penetrates through the shell wall of the water outlet part 12 and is connected to the water outlet passage 121. In this way, the gas located in the top space can be discharged into the water outlet passage 121 through the exhaust hole, and further the gas is discharged into the washing chamber 5.
[0064] It can be understood that in order to improve the exhaust efficiency, the gas located in the top space can be directly discharged into the exhaust hole. Therefore, in some specific embodiments, the hole wall of the exhaust hole is connected to the cavity top wall 1111. In this way, there is no other transition wall surface between the wall surface of the cavity top wall 1111 and the wall surface of the hole wall of the exhaust hole. In this way, the gas located in the top space can be quickly discharged into the exhaust hole to improve the exhaust efficiency and further avoid the phenomenon of trapped air inside the pump chamber 111 to a certain extent.
[0065] It should be noted that when the exhaust passage 6 extends in the horizontal direction, the axial direction of the exhaust hole also extends in the horizontal direction. In this way, the gas located in the top space can quickly flow into the water outlet passage 121 through the exhaust hole.
[0066] Regarding the flow state of the air flow in the exhaust hole, in order to further improve the exhaust efficiency, the resistance suffered by the air flow during flowing in the exhaust hole can be reduced. Exemplarily, the frictional force generated between the air flow and the hole wall of the exhaust hole can be reduced.
[0067] Therefore, in some embodiments, the hole wall of the exhaust hole is a smooth wall surface, that is to say, there are neither protrusions nor pits on the hole wall of the exhaust hole. In this way, the frictional force generated between the air flow and the hole wall of the exhaust hole is small, so that the resistance suffered by the air flow during flowing in the exhaust hole can be reduced, thereby improving the exhaust efficiency of the gas and simultaneously reducing the noise generated during the gas flow.
[0068] Please continue to refer to Figure 12 , Figure 12 is Figure 4 the enlarged schematic view of the local structure at E in. In some other alternative embodiments, the exhaust passage 6 is an exhaust groove, the notch of the exhaust groove communicates with the cavity inlet 1211, and the bottom of the exhaust groove extends towards the cavity top wall 1111. Among them, the notch of the exhaust groove is located below the bottom of the exhaust groove. In this way, the gas in the top space in the pump cavity 111 can be discharged into the water outlet passage 121 through the exhaust groove to discharge the gas in the top space.
[0069] In order to improve the exhaust efficiency of the gas, in the direction from top to bottom, the opening size of the exhaust groove gradually increases. In this way, compared with the situation where the opening size of the exhaust port of the exhaust groove gradually decreases or remains unchanged in the direction from top to bottom, through the above setting, in the extending direction of the exhaust groove, the longitudinal sectional area of the exhaust groove is larger, so that the air flow rate flowing through the exhaust groove per unit time will be more. Therefore, the exhaust efficiency of the gas will be improved, so as to avoid the phenomenon of air trapping in the pump cavity 111 to a certain extent.
[0070] Furthermore, when the air flow flows in the exhaust groove, the gas will be affected by the frictional force formed by the bottom wall of the exhaust groove on it, thereby increasing the resistance suffered by the gas during flowing. Therefore, in some embodiments, the bottom wall of the exhaust groove is a smooth wall surface. In this way, the frictional force exerted by the bottom wall of the exhaust groove on the air flow will be reduced, so that the resistance suffered by the air flow in the exhaust groove is small.
[0071] It should be noted that when the exhaust passage 6 is an exhaust groove, due to the limitation of the opening process of the exhaust groove itself, the bottom of the exhaust groove may not be at the same height as the top wall 1111 of the cavity. Therefore, in some embodiments, when the bottom of the exhaust groove is below the top wall 1111 of the cavity, the height difference between the bottom of the exhaust groove and the top wall 1111 of the cavity is within 5 millimeters. In this way, by restricting the range of the height difference between the bottom of the exhaust groove and the top wall 1111 of the cavity, although there is a height difference between the bottom of the exhaust groove and the top wall 1111 of the cavity, it still does not affect the gas in the top space to be discharged into the water outlet passage 121 through the exhaust groove.
[0072] When the gas in the top space flows into the exhaust passage 6, it will flow over the top wall 1111. That is to say, the top wall 1111 will generate a frictional force on the gas. When the frictional force is large, the resistance received by the gas during the flow process is large. Therefore, the resistance of the gas flowing in the top space can be reduced by reducing the frictional force generated by the top wall 1111 on the gas.
[0073] Therefore, in some embodiments, the top wall 1111 is a plane. In this way, when the gas flows in the top space, the resistance received by the gas during the flow process can be reduced to improve the exhaust efficiency.
[0074] Exemplarily, the above-mentioned top wall 1111 may be a horizontal plane. Here, the shape of the top wall 1111 is not specifically limited.
[0075] This embodiment also provides a dishwasher, including a water cup 3, the water pump in the above embodiment, and a spray arm. The water inlet 112 is communicated with the water cup 3 through a water inlet pipe 2, and the water outlet 1212 is communicated with the spray arm through a water outlet pipe 4.
[0076] The dishwasher provided in this embodiment further includes a control unit, which is used to control the motor of the washing pump to perform a preset number of start-up operations and stop operations after the dishwasher is powered on, so that the gas in the pump chamber 111 flows into the water outlet passage 121 through the exhaust passage 6.
[0077] Specifically, after the start button of the dishwasher is pressed, the control unit first controls the washing pump to start running. After running continuously for the first duration, it pauses. When the stop running duration reaches the second duration, it controls the water pump to start running again. After running continuously for the first duration, it pauses until the start-stop times of the washing pump reach the preset number. During this process, when the washing pump starts running, the impeller throws the water in the pump chamber 111 upward. After the impeller stops, the thrown water flows back to the pump chamber 111 under the action of gravity, and the air in the top space is squeezed out through the exhaust passage 6. After a certain number of round-trip flushes, the air in the pump chamber 111 can be basically emptied. Among them, the first duration, the second duration, and the preset number can be set and adjusted according to the specific performance of the washing pump.
[0078] After the above exhaust operation is completed, the washing program is executed. First, water is injected into the washing chamber 5 of the dishwasher. This stage is the water inlet stage. After the water is injected into the washing chamber 5, it will first gather towards the water cup 3 and enter the pump chamber 111 through the water inlet 112 along the water inlet pipe 2. Under the rotation of the impeller, the washing water in the pump chamber 111 is pumped out through the water outlet 1212 into the spray arm, and the spray arm sprays the washing water onto the tableware placed in the washing chamber 5 to clean the tableware.
[0079] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.
[0080] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A water pump, characterized in that, It includes a pump housing, and the pump housing includes a pump housing main body and a water outlet part connected together; The pump housing main body is formed with a pump chamber and a water inlet communicating with the pump chamber. A water outlet passage is formed in the water outlet part. One end of the water outlet passage is formed as an in-chamber inlet communicating with the pump chamber, and the other end of the water outlet passage is formed as a water outlet. And the in-chamber inlet is located below the top wall of the pump chamber; The pump housing is further provided with an exhaust passage extending from the pump housing main body to the water outlet part, and the exhaust passage communicates the top space of the pump chamber and the water outlet passage.
2. The water pump according to claim 1, characterized in that, The pump housing further includes a connecting part, and two ends of the connecting part are respectively connected to the pump housing main body and the water outlet part; The shell wall of the pump housing main body, the shell wall of the water outlet part and the connecting part define the exhaust passage.
3. The water pump according to claim 1, characterized in that, The exhaust passage extends in the horizontal direction.
4. The water pump according to any one of claims 1 to 3, characterized in that, The wall of the pump chamber further includes a chamber side wall connected to the periphery of the top wall of the chamber; The top wall of the chamber and the chamber side wall at the top define the top space, and the exhaust passage penetrates through the chamber side wall defining the top space.
5. The water pump according to claim 4, characterized in that, The wall surface of the chamber side wall defining the top space is a smooth wall surface.
6. The water pump according to claim 4, wherein, The exhaust passage is an exhaust hole.
7. The water pump according to claim 6, characterized in that, The hole wall of the exhaust hole is connected to the top wall of the chamber.
8. The water pump according to claim 6, characterized in that, The hole wall of the exhaust hole is a smooth wall surface.
9. The water pump according to claim 4, characterized in that, The exhaust passage is an exhaust groove. The notch of the exhaust groove communicates with the in-chamber inlet, and the bottom of the exhaust groove extends towards the top wall of the chamber.
10. The water pump according to claim 9, characterized in that, In the direction from top to bottom, the opening size of the exhaust groove gradually increases.
11. The water pump according to claim 9, wherein, The bottom wall of the exhaust groove is a smooth wall surface.
12. The water pump according to claim 9, characterized in that, The bottom of the exhaust groove is located below the top wall of the chamber, and the height difference between the bottom of the exhaust groove and the top wall of the chamber is within 5 millimeters.
13. The water pump according to claim 4, characterized in that, The top wall of the chamber is a plane.
14. The water pump according to claim 4, characterized in that, It further includes an impeller and a heating pipe arranged in the pump chamber. The heating pipe is located at the middle position of the pump chamber in the axial direction of the impeller; The chamber side wall includes two first chamber side walls oppositely arranged in the axial direction of the impeller and two second chamber side walls oppositely arranged in the radial direction of the impeller; Wherein, one of the first chamber side walls is provided with the water inlet, and the exhaust passage is arranged at the corner formed by the first chamber side wall with the water inlet and the second chamber side wall connected to the first chamber side wall.
15. A dishwasher, characterized in that, It includes a water cup, the water pump according to any one of claims 1 to 14, and a spray arm. The water inlet is communicated with the water cup through a water inlet pipe, and the water outlet is communicated with the spray arm through a water outlet pipe.
16. The dishwasher according to claim 15, wherein, It further includes a control unit, and the control unit is configured to control the motor of the water pump to perform a preset number of start-up operations and stop operations after the dishwasher is powered on, so that the gas in the pump chamber flows into the water outlet passage through the exhaust passage.