WO2019010850A1

WO2019010850A1 - Dishwasher washing pump and dishwasher

Info

Publication number: WO2019010850A1
Application number: PCT/CN2017/105501
Authority: WO
Inventors: 徐伟; 董媛媛; 杨林
Original assignee: 青岛海尔洗碗机有限公司
Priority date: 2017-07-14
Filing date: 2017-10-10
Publication date: 2019-01-17
Also published as: CN109247895B; CN109247895A

Abstract

Disclosed are a dishwasher washing pump and a dishwasher. The dishwasher comprises a spray arm. The washing pump comprises a pump housing (2) having an inner cavity, wherein openings (6, 7) are provided on the pump housing (2) to communicate with the spray arm; flow guide portions (1, 5) are arranged inside the inner cavity of the pump housing (2); some of the structures of the flow guide portions (1, 5) are located in projections of the openings (6, 7) in the inner cavity (3); and the flow guide portions (1, 5) are used for guiding a water flow inside the pump housing (2) to change a movement direction so as to break up a vortex and reduce a local pressure loss of the water flow, thereby eliminating an energy loss caused by a "dead water zone" or "vortex zone" in the washing pump, and improving the working efficiency of the washing pump.

Description

Dishwasher washing pump and dishwasher

Technical field

The invention belongs to the field of kitchen equipment, in particular to a dishwasher washing pump and a dishwasher.

Background technique

With the improvement of living standards, people's requirements for quality of life are getting higher and higher, so that the requirements for quality, performance, humanization of use, and intelligent operation are becoming higher and higher. As an excellent product, the dishwasher has gradually entered people's lives. The dishwasher is a device that automatically cleans dishes, chopsticks, plates, dishes, knives, forks, etc., which can reduce labor intensity, improve work efficiency, and improve hygiene. The water used in the dishwasher washing cycle is circulating water, and the sink of the dishwasher is fitted with the bottom of the tank as a container for storing circulating water. During the washing process of the dishwasher, the circulating water flows into the washing pump from the bottom of the sink, and is sprayed by the washing pump to the shower to wash the dishes, which flows down from the inner surface of the tableware and the inner tank and flows back to the sink. Usually the washing pump needs enough power, and the head and water pressure are sufficient to spray the water to the desired position to achieve the desired washing effect.

However, in the actual operation of the dishwasher, local pressure loss is often caused at the washing pump, which seriously affects the useful output power of the washing pump. The so-called partial pressure loss refers to the pressure loss caused by the local resistance of the liquid flowing through the valve port, the elbow, and the change of the flow cross section. The cause of partial pressure loss: when the liquid flows through the local device, it forms a dead water zone or a vortex zone. The liquid does not participate in the main flow in this zone, but continuously swirls, accelerates the liquid friction or causes the particle collision, and generates local energy loss; When the liquid flows through the local device, the magnitude and direction of the flow rate change abruptly, and the velocity distribution law on each cross section also changes constantly, causing additional friction and consuming energy. It can be seen that the cause of the partial pressure loss is the energy loss caused by the "dead water zone" or the "vortex zone". Therefore, it is necessary to provide a corresponding device to avoid the above-mentioned energy loss zone of the washing water at the washing pump, thereby reducing the pressure caused thereby. Loss, thereby increasing the efficiency of the washing pump.

The present invention has been made in view of the above.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a dishwasher washing pump and a dishwasher, which eliminate energy loss caused by "dead water zone" or "vortex zone" in the washing pump, Improve the working efficiency of the washing pump.

In order to achieve the object, the present invention adopts the following technical solutions:

A dishwasher washing pump, the dishwasher comprising a spray arm, the washing pump comprising a pump casing having an inner cavity, the pump casing having an opening communicating with the spray arm, the inside of the pump casing a flow guiding portion is disposed in the cavity, and a part of the structure of the guiding portion is located The opening is within the projection of the inner cavity, and the flow guiding portion is configured to guide the water flow in the pump casing to change the moving direction, break up the vortex, and reduce the partial pressure loss of the water flow.

Further, the flow guiding portion is a water guiding rib protruding from an inner surface of the pump casing;

Preferably, the water guiding rib is integrally formed on an inner wall of the pump casing.

Further, one end of the water guiding rib is located at the beginning of the water flow vortex in the pump casing, and is tangential to the water flow vortex.

Further, the other end of the water guiding rib extends along the curve in the direction of the water flow in the pump casing toward the side wall of the pump casing, and the curve is a water guiding rib curve.

Further, the water guiding curve of the same strip includes curves of different radii of curvature;

Preferably, the radius of curvature is greater than a radius of curvature of the pump casing.

Further, the number of openings is plural, and the number/length of the water guiding ribs corresponding to the different openings varies according to the intensity of the water flow at the inner cavity where the water guiding rib is located;

Preferably, when the opening corresponds to a plurality of water guiding ribs, the plurality of water guiding ribs do not intersect each other.

Further, the height of the water guiding rib is smaller than the height of the cavity.

Further, the flow guiding portion is a cylindrical water guiding column protruding from the inner surface of the pump casing and closely adhering to the surface;

Preferably, the water guiding column height is smaller than the height of the cavity; and the water flow is in a vortex in the inner cavity;

Preferably, the number/height/thickness of the water guiding column varies according to the intensity of the water flow at the inner cavity where the water guiding column is located.

Further, the flow guiding portion is a strip-shaped guide groove having a curved curve which is recessed on an inner surface of the pump casing;

Preferably, one end of the flow guiding trough is located at the beginning of the water flow vortex in the pump casing and is tangential to the water flow vortex there.

A dishwasher using the dishwasher washing pump of any of the above, characterized in that the washing pump casing of the dishwasher has the flow guiding portion for eliminating a swirl of water flow in the washing pump.

After adopting the above technical solution, the present invention has the following advantageous effects compared with the prior art.

The dishwasher washing pump and the dishwasher of the present invention guide the water flow in the pump casing to change the moving direction and break up the vortex by the flow guiding portion provided in the inner cavity of the washing pump casing, thereby reducing the water flow. Partial pressure loss improves the working efficiency of the washing pump.

One of the flow guiding portions of the present invention is a water guiding rib protruding from the inner surface of the pump casing and having one end located inside the pump casing The beginning of the water vortex, and tangential to the water flow vortex, and the curve of the appropriate radius of curvature in the direction of its extension, so that when the water rib breaks the vortex and eliminates the "dead water zone", The blockage of the water flow and the energy loss caused by the flow are minimized.

At the same time, the invention is also well suited for use in a dishwasher that drives a plurality of spray arms through a wash pump. In such a dishwasher, the portion of the pump casing that is in communication with the lower portion of each of the spray arms is partially resisted due to a change in the bend or flow cross section, causing local pressure loss. Therefore, in the present invention, the water guiding rib is arranged at the opening of each pump casing and the spray arm, and the number/length of the water guiding ribs at each opening is increased or decreased according to the change of the water flow intensity and the special The design fully considers the requirements of each area that is prone to local pressure loss, and balances the overall requirements of the dishwasher, greatly improving the efficiency of the entire washing pump. At the same time, due to the shape, quantity and spatial distribution of the water guiding ribs, the factors are optimized accordingly, and the pressure loss caused by the obstruction of the whole guiding device itself is minimized.

The invention further designs an implementation form of a plurality of water guiding portions such as a water guiding column or a water guiding trough, and can individually select different washing pumps to maximize the utilization of the water guiding unit after the combination of the diversion portion and the specific pump casing. The effect is that the washing pump is more efficient in water spraying, and the washing effect of the dishwasher is better and the water saving is more. Moreover, since the flow guiding portion eliminates eddy currents and turbulence, the working noise of the washing pump during operation is also greatly reduced.

The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. It is apparent that the drawings in the following description are only some embodiments, and other drawings may be obtained from those skilled in the art without departing from the drawings. In the drawing:

Figure 1 is a schematic view of a pump casing of a dishwasher washing pump and a dishwasher of the present invention;

2 is a schematic view showing the appearance of a pump casing of a dishwasher washing pump and a dishwasher according to the present invention;

In the figure: 1, the first water guiding rib; 2, the pump casing; 3, the inner cavity; 4, the water channel; 5, the second water guiding rib; 6, the first opening; 7, the second opening;

It is to be understood that the drawings and the written description are not intended to limit the scope of the present invention in any way.

Detailed ways

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the following will be incorporated in the embodiments of the present invention. The drawings illustrate the present invention in a clear and complete manner, and the following examples are intended to illustrate the invention but not to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. The orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplified description, rather than indicating or implying that the device or component referred to has a specific orientation, in a specific orientation. The construction and operation are therefore not to be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

As shown in FIGS. 1 to 2, the present invention discloses a dishwasher washing pump and a dishwasher, the dishwasher comprising a spray arm, the washing pump comprising a pump casing 2 having a cavity 3, the pump An opening is opened in the shell 2 to communicate with the spray arm, and a flow guiding portion is disposed in the inner cavity 3 of the pump casing 2, and a partial structure of the flow guiding portion is located at a projection of the opening in the inner cavity 3. The flow guiding portion is configured to guide the water flow in the pump casing 2 to change the moving direction, break up the vortex, and reduce the partial pressure loss of the water flow. The invention eliminates the energy loss caused by the "dead water zone" or "vortex zone" in the wash pump, thus improving the working efficiency of the wash pump.

Example 1

As shown in Figures 1 to 2, a dishwasher washing pump is disclosed in this embodiment. The washing pump is installed in the dishwasher and communicates with the spray arm of the dishwasher to provide high pressure washing water for the spray arm, so that the spray arm rotates rapidly under the reaction force of the sprayed washing water. At the same time, high-pressure washing water is sprayed onto the tableware to wash the dishwasher. According to the washing principle of the dishwasher, the washing effect of the dishwasher is directly related to the working efficiency of the washing pump, that is, the washing water pressure provided by the washing pump.

However, in the actual operation of the dishwasher, local pressure loss is often caused at the washing pump, which seriously affects the useful output power of the washing pump. The so-called partial pressure loss refers to the pressure loss caused by the local resistance of the liquid flowing through the valve port, the elbow, and the change of the flow cross section. The cause of partial pressure loss: when the liquid flows through the local device, it forms a dead water zone or a vortex zone. The liquid does not participate in the main flow in this zone, but continuously swirls, accelerates the liquid friction or causes the particle collision, and generates local energy loss; When the local device flows through, the magnitude and direction of the flow rate change abruptly, and the velocity distribution law on each cross section also changes constantly, causing additional friction and consuming energy. To solve the partial pressure loss, it is necessary to intervene in the water flow, and guide the water flow at the vortex generation to change the original flow direction of the water flow, so that the generated vortex is broken up in time.

The opening on the dishwasher pump casing that communicates with the spray arm is most likely to cause the above partial pressure loss due to the sharply smaller cross-sectional area of the water flow here and the radius of curvature of the inner wall of the pump casing is too small. The location where the situation occurs. The present invention provides corresponding flow guiding portions for these regions to eliminate the vortex region or the dead water region.

As shown, the present invention is provided with a flow guiding portion in the inner cavity 3 of the pump casing 2, a partial structure of the flow guiding portion is located in the projection of the opening in the inner cavity 3, and the flow guiding portion is used. The water flow in the pump casing is changed to change the direction of motion, and the vortex is scattered to reduce the partial pressure loss of the water flow. The flow guiding portion in this embodiment is a water guiding rib protruding from the inner surface of the pump casing; specifically, that is, the first guiding corresponding to the first opening 6 in FIGS. 1 and 2, respectively. The rib 1, and the second water guiding rib 5 corresponding to the second opening 7. In the embodiment, the water guiding rib is an elongated water guiding rib which is closely adhered to the inner wall as a whole, and is integrally formed on the inner wall of the pump casing 2. In other embodiments, the number of the spray arms can be increased or decreased, and the water guiding ribs as described in the embodiment are disposed in the inner cavity 3 of the corresponding lower opening, which will not be described herein.

In this embodiment, as shown in FIG. 1 and FIG. 2, one ends of the first water guiding rib 1 and the second water guiding rib 5 are located at the beginning of the water flow vortex in the pump casing, and are tangential to the water flow vortex at that place; One end extends along the curve in the direction of the water flow in the pump casing toward the side wall of the pump casing, and the curve is a water guiding curve. In the embodiment, the first water guiding rib 1 comprises two water guiding ribs, and respectively forms a starting point of the water flow vortex from the first opening 6 in the pump casing, and extends in a curve direction toward the sidewall of the pump casing at the first opening 6. The way to extend and eventually intersect on the side wall of the pump casing; and the second water guiding rib 5 includes only one water guiding rib, which is the starting point of the water flow vortex from the second opening 7 in the pump casing, to the second The direction of the side wall of the pump casing at the opening 7 extends in a curved manner. Due to the direction of the water flow at the second opening 7, as shown in Fig. 1, the second water guiding rib 5 does not intersect the side wall.

The first water guiding rib 1 and the second water guiding rib 5 both extend along the curve toward the water pump, and the water guiding rib curves all include curves of different radii of curvature, and the radius of curvature is a value calculated according to a simulation experiment of the water flow and a fluid calculation. In order to enable the water guiding rib to eliminate the "vortex zone" and the "dead water zone" while minimizing the barrier of the water guiding dam to the water flow in the inner cavity 3, the radius of curvature is larger than the radius of curvature of the pump casing.

The invention is applicable to a plurality of spray arms, the pump casing opening is a plurality of washing pumps, and the number/length of the water guiding ribs corresponding to different pump casing openings is different according to the water flow intensity at the inner cavity of the water guiding rib. Variety.

As shown in Figures 1 and 2, the dishwasher of this embodiment uses a water pump and simultaneously supplies water to the two spray arms. The two spray arms are respectively in communication with the first opening 6 and the second opening 7, and the lower portions of the first opening 6 and the second opening 7 are simultaneously communicated with the pump wheel of the water pump through the water channel 4. As shown in Fig. 1, the first opening 6 in this embodiment is closer to the pump wheel of the water pump, and the water flow intensity here is greater than that of the second opening 7. When the vortex is caused, the vortex water flow intensity at the first opening 6 is greater, and the corresponding partial pressure loss is also greater, so the first water guiding rib 1 needs to be composed of two water guiding ribs, and the second guiding The ribs 5 only need a water guiding rib. At the same time, the length of the first water guiding rib 1 is also longer than that of the second water guiding rib 5 The length is long, because only in this way is it possible to achieve a better effect of eliminating local pressure loss at the first opening 6 having a greater strength. Since the second opening 7 is far away from the pump wheel, the water flow pressure is reduced after the water flow passes through the water channel 4, and the vortex and turbulence are reduced. Therefore, in order to enable the water spray and washing of the two spray arms Balancing, compared with the first opening 6, the second opening 7 is to minimize the pressure loss caused by the diversion itself, and the requirement for eliminating the vortex and turbulence is much lower than that of the first opening 6. Therefore, there is only one second water guiding rib 5 at the second opening 7, and the length is also shorter than the first water guiding rib 1.

It can be known from the flow characteristics of the fluid that the change in the spacing between the individual water guiding ribs is required to meet the requirements of the water flow change, so that a reasonable design is required in the extending direction of the water guiding rib. As shown in FIG. 1 , a first water guiding rib 1 composed of a plurality of water guiding ribs is correspondingly arranged at the first opening 6 , and the plurality of water guiding bodies are reduced in order to minimize the pressure loss caused by the guiding current itself. The ribs cannot intersect each other. Further, in the present embodiment, as shown in FIG. 1, each of the water guiding ribs in the first water guiding rib 1 faces away from each other in a direction extending toward the side wall of the pump casing. Such a design can meet the needs of fluid flow without causing pressure loss due to the small cross section at the outlet of the flow guide.

At the same time, the height of the water guiding rib in the embodiment is smaller than the height of the inner cavity 3, so that the bottom water flow which eliminates the vortex at the bottom can flow in the upper part of the water guiding rib, further reducing the water flow pressure loss caused by the water guiding rib itself.

Example 2

The difference between this embodiment and the embodiment 1 is that the flow guiding portion in the embodiment 2 is a cylindrical water guiding column that protrudes from the inner surface of the pump casing and closely adheres to the surface. Similar to Embodiment 1, the water guiding column height is less than the height of the cavity; and the water flow creates a vortex within the inner cavity. The function of the water guiding column is similar to that of the above-mentioned water guiding rib, which changes the traveling direction of the original water flow, breaks up the vortex water flow, eliminates the vortex area and the dead water area, thereby reducing the partial pressure loss of the washing pump.

Further, the number and height of the water guiding columns of Embodiment 2 and the thickness vary depending on the intensity of the water flow at the inner cavity where the water guiding column is located. Thereby the effective power of the washing pump is more effectively ensured and the water flow at different outlets is more balanced. For example, a water guide column with more, and or higher, and or thicker at a position where the water flow intensity is greater is required to achieve the technical requirements.

Example 3

The difference between the embodiment and the embodiment 1 and the embodiment 2 is that the flow guiding portion in the embodiment 3 is a strip-shaped guide groove having a curved curve which is recessed on the inner surface of the pump casing; One end of the diversion trough is located at the beginning of the water vortex in the pump casing and is tangential to the water flow vortex there. Of course, similar to the above embodiment, the length, depth and number of the flow guiding groove are also related to the intensity of the vortex water flow at the position. When the vortex water flow intensity is large, the guiding groove here should be selected in length. Longer, and or deeper, and or a larger number of diversion channels.

Example 4

The difference between this embodiment and the embodiment 1 is that the flow guiding portion used in the embodiment 4 is not a water guiding rib protruding from the inner surface of the pump casing, but a semi-suspended water guiding water fixed by the fixing device and the inner wall of the pump casing. Partition. The water guiding partition of the present embodiment is different from the water guiding rib of the first embodiment in that the bottom of the water guiding partition is not closely attached to the inner surface of the pump casing, but is suspended. The water guiding partition of the embodiment is designed to allow water to flow freely from the top and bottom of the water guiding partition, but the middle portion of the water flow is still deflected by the water guiding partition, thereby eliminating the swirl of the water flow. Partial pressure loss caused.

Example 5

The embodiment discloses a dishwasher using the dishwasher washing pump according to any of the above embodiments, wherein the washing pump casing of the dishwasher has the above-mentioned embodiment for eliminating the washing pump. A water flow vortex deflector that is an efficient dishwasher that eliminates partial pressure loss within the dishwasher wash pump.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any technology that is familiar with the present patent. Those skilled in the art can make some modifications or modifications to equivalent embodiments by using the technical content of the above-mentioned hints without departing from the technical scope of the present invention, but the technology according to the present invention does not deviate from the technical solution of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present invention.

Claims

A dishwasher washing pump, the dishwasher comprising a spray arm, the washing pump comprising a pump casing having an inner cavity, the pump casing having an opening communicating with the spray arm, wherein a flow guiding portion is disposed in the inner cavity of the pump casing, and a partial structure of the guiding portion is located in the projection of the opening in the inner cavity, and the guiding portion is used for guiding the water flow in the pump casing to change the moving direction, A vortex is scattered to reduce the local pressure loss of the water flow.
The dishwasher washing pump according to claim 1, wherein the flow guiding portion is a water guiding rib protruding from an inner surface of the pump casing;

Preferably, the water guiding rib is integrally formed on an inner wall of the pump casing.
A dishwasher washing pump according to claim 2, wherein one end of said water guiding rib is located at the beginning of the swirl of the water flow in the pump casing and is tangential to the water flow vortex there.
The dishwasher washing pump according to claim 3, wherein the other end of the water guiding rib extends in a direction of water flow in the pump casing toward the side wall of the pump casing, and the curve is a water guiding rib curve.
A dishwasher washing pump according to claim 4, wherein the same said water guiding rib curve comprises curves of different radii of curvature;

Preferably, the radius of curvature is greater than a radius of curvature of the pump casing.
The dishwasher washing pump according to any one of claims 2 to 5, wherein the opening is plural, and the number/length of the water guiding ribs corresponding to the different openings is according to the inside of the water guiding rib The intensity of the water flow at the cavity varies;

Preferably, when the opening corresponds to a plurality of water guiding ribs, the plurality of water guiding ribs do not intersect each other.
The dishwasher washing pump according to claim 6, wherein the height of the water guiding rib is smaller than the height of the cavity.
The dishwasher washing pump according to claim 1, wherein the flow guiding portion is a cylindrical water guiding column protruding from an inner surface of the pump casing and closely adhering to the surface;

Preferably, the water guiding column height is smaller than the height of the cavity; and the water flow is in a vortex in the inner cavity;

Preferably, the number/height/thickness of the water guiding column varies according to the intensity of the water flow at the inner cavity where the water guiding column is located.
The dishwasher washing pump according to claim 1, wherein the flow guiding portion is a strip-shaped guide groove having a curved curve which is recessed on an inner surface of the pump casing;

Preferably, one end of the flow guiding trough is located at the beginning of the water flow vortex in the pump casing and is tangential to the water flow vortex there.
A dishwasher using the dishwasher washing pump according to any one of claims 1 to 9, wherein The drain pump housing of the dishwasher has the flow guides for eliminating swirls of water flow in the wash pump.