CN114532929A

CN114532929A - Dishwasher and dishwasher control method

Info

Publication number: CN114532929A
Application number: CN202011339032.6A
Authority: CN
Inventors: 蔡延涛; 刘闪闪; 刘日超; 李翔
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2022-05-27

Abstract

The invention is applicable to the field of dish-washing machines and provides a dish-washing machine and a control method of the dish-washing machine. Wherein, the dish washer includes: the water tank is provided with a water cavity for accommodating water, and a first water inlet, a first water outlet and a second water outlet which are communicated with the water cavity; the water cup is provided with a second water inlet; the cut-off valve is used for opening or closing the second water outlet; when the cut-off valve closes the second water outlet and the level of the water body in the water cavity exceeds a set water level, the water body exceeding the set water level in the water cavity sequentially enters the water cup through the first water outlet and the second water inlet; when the cut-off valve opens the second water outlet, the water in the water cavity sequentially enters the water cup through the second water outlet and the second water inlet. The dishwasher provided by the invention can achieve the effect of energy conservation, simplify the structure and control and reduce the production cost.

Description

Dishwasher and dishwasher control method

Technical Field

The invention belongs to the technical field of dish-washing machines, and particularly relates to a dish-washing machine and a control method of the dish-washing machine.

Background

The household dish washer is an intelligent household appliance product for replacing manual tableware cleaning. In the working process of washing tableware by the dish washing machine, washing water is conveyed to each rotary spray arm through the washing pump to continuously cover and spray the tableware for washing, so that the aim of cleaning the tableware is fulfilled. In order to further shorten the washing time of the dishwasher, the existing dishwasher washing system adopts a mode of arranging an electric heater to increase the temperature of the washing water. Under the action of the circulating spraying of the washing water, the high-temperature washing water washes away pollutants on the tableware and brings heat to the tableware, so that the dishwasher system can obtain higher cleaning rate and drying rate in shorter washing time.

Because at whole duty cycle's in-process, the dish washer complete machine is in non-insulated state, through set up the water tank on the inner bag of dish washer, can be with the heat transfer of hot water in the inner bag to water storage has carried out preheating heat preservation effect in the water tank, thereby practices thrift the energy consumption. How to realize the water body exchange and the heat exchange of inner bag and water tank, prior art has adopted multiple technical scheme, all has the problem that structure and control are complicated.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned disadvantages of the prior art and providing a dishwasher and a method for controlling the dishwasher, which aim to provide another solution for achieving water and heat exchange between the inner tub and the water tank to simplify the structure and control.

In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

a dishwasher, comprising:

the water tank is provided with a water cavity for accommodating water, and a first water inlet, a first water outlet and a second water outlet which are communicated with the water cavity;

the water cup is provided with a second water inlet;

the cut-off valve is used for opening or closing the second water outlet;

when the cut-off valve closes the second water outlet and the level of the water body in the water cavity exceeds a set water level, the water body exceeding the set water level in the water cavity sequentially enters the water cup through the first water outlet and the second water inlet; when the second water outlet is opened by the cut-off valve, the water body in the water cavity sequentially enters the water cup through the second water outlet and the second water inlet.

Optionally, the first water outlet is arranged at the set water level, the second water outlet is closed by the block valve, and when the water level in the water cavity reaches the set water level, the water exceeding the designed water level overflows from the first water outlet and enters the water cup through the second water inlet.

Optionally, the dishwasher further comprises a float liquid level switch, and the float liquid level switch is used for detecting whether the water level of the water body in the water cavity reaches a set water level.

Optionally, the dishwasher further comprises a flow meter for measuring the flow rate of the first water inlet.

Optionally, the dishwasher further comprises a pressure switch disposed at the second water outlet, and when the actual water inflow amount of the water cup reaches the rated water amount, the pressure switch is closed to close the second water outlet.

Optionally, the dishwasher further comprises a drain pipe for draining the water body of the cup, the drain pipe passing through the water tank.

Optionally, the dishwasher further comprises a water softener having a resin chamber and a regeneration chamber, and a direction valve for connecting the water tank to the water tank from the first water outlet or the second water outlet and selectively delivering the water to the resin chamber and the regeneration chamber; and the water body flows in the regeneration cavity and the resin cavity in a one-way manner and flows into the second water inlet through the interface arranged on the regeneration cavity.

A dishwasher control method, adapted to the dishwasher as described above, comprising the steps of:

a: judging whether the water level of the water in the water cavity reaches a set water level or not, wherein the water quantity of the water in the water cavity is N when the water level of the water in the water cavity reaches the set water level; if yes, executing step C; if not, executing the step B;

b: filling water into the water cavity from the first water inlet under the state that the cut-off valve is closed, and then executing the step A;

c: judging a water inlet demand Q, executing a step D when the water inlet demand Q is greater than N, and executing a step E when the water inlet demand Q is less than or equal to N;

d: water (Q-N) is fed into the water cup through the first water inlet and the first water outlet, then the stop valve is opened, and water N is fed into the water cup through the second water outlet;

e: opening the cut-off valve, and feeding water Q into the water cup through the second water outlet;

f, spraying operation;

g: counting the water inlet times of the water cup, and finishing washing when the water inlet times are equal to the set times; otherwise, executing step A;

optionally, in step G, when the number of water intakes is equal to the set number, the washing is ended, and step H is executed: and closing the cut-off valve, and filling the water cavity with water through the first water inlet to ensure that the volume of the water in the water cavity is N.

Optionally, in the step F, judging whether the actual water inflow of the water cup reaches the rated water amount, if so, performing spraying operation, and then entering the step G; otherwise, executing the step A.

According to the dish washing machine provided by the invention, through the matched arrangement of the cut-off valve, the first water outlet and the second water outlet, the switching of water supply of the water tank and water supply of tap water is realized, the energy-saving effect is achieved, the simplification of the structure and the control are facilitated, and the production cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a dishwasher according to an embodiment of the present invention;

FIG. 2 is a first method for controlling a dishwasher according to an embodiment of the present invention;

fig. 3 shows a second control method of a dishwasher according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1. an inner container; 2. a water cup; 3. a water tank; 301. a first water inlet; 302. a first water outlet; 303. a second water outlet; 4. a shut-off valve; 5. a float level switch; 6. a flow meter; 7. a washing pump; 8. a water discharge pipeline; 9. a water inlet valve; 10. draining pump; 11. a spray arm; 12. a regeneration chamber; 13. a resin chamber.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 3, a dishwasher and a dishwasher control method provided in the present application will now be described.

Referring to fig. 1, in a water circulation system of a dishwasher, a washing pump 7 transports water in a water cup 2 to a spray arm 11 of a spray system, and sprays the water to a space of an inner container 1 through a water spray opening on the spray arm 11 to wash dishes in the inner container 1. In order to further shorten the washing time of the dishwasher, the existing dishwasher washing system adopts a mode of arranging an electric heater to increase the water temperature of the water body. Under the action of the circulating spraying of the water body, the high-temperature water body washes away pollutants on the tableware and brings heat to the tableware, so that the dishwasher system can obtain higher cleaning rate and drying rate in shorter washing time.

In the embodiment, the water tank 3 is arranged on the dish washer, and the water tank 3 is firstly connected into the water body from the outside and then conveyed into the water cup 2. Be in non-insulation state between water tank 3 and the inner bag 1 for the heat of inner bag 1 can transmit to water tank 3, preheats the heat preservation to the water in the water tank 3, inputs drinking cup 2 with the water in the water tank 3 again when spraying, thereby reaches the effect of practicing thrift the energy consumption.

Generally, the water tank 3 is connected with tap water from a water inlet valve 9, and the temperature of the tap water is about 15 ℃. After entering the water tank 3, the water tank 3 is kept still, and the water temperature of the water tank 3 gradually reaches the room temperature (about 23 ℃). When the dishwasher starts a washing program, the water body of the water tank 3 is heated to meet the requirement of high-temperature washing in the process of conveying the water body to the spray arm 11 through the water cup 2. In other words, the inner container 1 is in a high temperature state during the washing process. Because the temperature difference exists between the inner container 1 and the water tank 3 and the inner container is in a non-heat insulation state, heat exchange is generated between the inner container 1 and the water tank 3, and the water body temperature of the water tank 3 is further increased. And as the water body temperature of the water tank 3 increases, the energy required for the water body to subsequently enter the spraying system and be heated to a specific temperature is reduced, so that the energy conservation is achieved. It should be noted that the water tank 3 is in a full load state most of the time during the washing process of the dishwasher, and supplements the water required by the washing system and improves the energy saving effect.

Specifically, the water tank 3 has a water cavity for accommodating a water body, and a first water inlet 301, a first water outlet 302 and a second water outlet 303 which are communicated with the water cavity. The second water outlet 303 is provided with a block valve 4, and the block valve 4 is used for opening or closing the second water outlet 303. The water cup 2 is provided with a second water inlet.

When the cut-off valve 4 closes the second water outlet 303 and the level of the water body in the water cavity exceeds the set water level, the water body exceeding the set water level in the water cavity enters the water cup 2 through the first water outlet 302 and the second water inlet; when the cut-off valve 4 opens the second water outlet 303, the water in the water cavity enters the water cup 2 through the second water outlet 303 and the second water inlet.

It is understood that the inlet valve 9 and the first inlet 301 are connected by a pipe, the first outlet 302 and the second inlet, and the second outlet 303 and the second inlet are connected by a pipe. The first water outlet 302, the second water outlet 303 and the second water inlet can be connected through a tee joint.

In one embodiment, the shut-off valve 4 is always closed, and the water required for washing passes through the following paths: the water inlet valve 9-the first water inlet 301-the water tank 3-the first water outlet 302-the second water inlet-the water cup 2-the spraying system. At this time, the water tank 3 corresponds to a pipe having an increased pipe diameter size.

In this embodiment, the water required for the dishwasher washing has two paths: 1. the water inlet valve 9-the first water inlet 301-the water tank 3-the first water outlet 302-the second water inlet-the water cup 2-the spraying system; 2. the water inlet valve 9-the first water inlet 301-the water tank 3-the second water outlet 303-the second water inlet-the water cup 2-the spraying system.

It will be appreciated that the maximum capacity of the water tank 3 is fixed. When the amount of water required for washing is larger than the maximum capacity of the water tank 3, the excess amount needs to be replenished by re-connecting tap water. The first water outlet 302 is arranged so that water exceeding a set volume can enter the water cup 2 through the first water outlet 302. And when the water quantity required by washing is not more than the set capacity of the water tank 3, the water in the water tank 3 is supplemented into the water cup 2 through the second water outlet 303. Assuming that the amount of water required for washing is equal to the set capacity of the water tank 3, the whole water in the water tank 3 is delivered to the water cup 2 through the second water outlet 303, so that the water tank 3 is in an empty state. Then, the cut-off valve 4 is closed to replenish water to the water tank 3. The water heated in the water tank 3 is supplemented to the water cup 2, the temperature of the new tap water is lower than that of the water in the original water cavity, and the dishwasher can heat the water newly supplemented to the water tank 3 in a high-temperature environment while performing high-temperature washing operation, so that heat circulation is realized. Therefore, the design that the water body in the water tank 3 is timely emptied to the water cup 2 is compared with the arrangement of a similar pipeline of the water tank 3, and better energy storage and heat exchange can be achieved, so that the energy-saving effect is further improved.

It will be appreciated that the set volume of the tank 3 may be the maximum volume of water that can be accommodated by the water chamber, or it may be a specific amount of water. In this embodiment, the set volume of the water tank 3 is a manually set water volume, which is N. When the liquid level of the water body in the water tank 3 reaches the set water level, the water amount is N. The water volume is smaller than the volume of the water tank 3, so that when the water volume of the water tank 3 is N, the liquid level and the upper cavity wall of the water cavity are left with space allowance.

In actual operation, after each washing, the water tank 3 is replenished so that the water tank 3 is in a full-load state. The water in the water tank 3 is kept still until the next washing, and the water in the water tank 3 can be slowly raised to the room temperature (about 23 ℃) from cold water (about 15 ℃ tap water) by the standing of the time. When washing is started, the water in the water tank 3 is conveyed to the water cup 2, and if the water amount of the water in the water tank 3 is not enough to meet the spraying and water inlet requirements of the water cup 2, tap water is connected again for supplement. It can be appreciated that the dishwasher requires multiple spray operations to wash dishes, with differences in the amount of water required for each spray. The volume of the water tank 3 is designed according to the amount of water required for spraying, and space limitation is also taken into consideration. The space occupied by the water tank 3 is reduced while the requirement of spraying water is met as much as possible. Thus, the water supply to the cup 2 is mostly from the storage water of the tank 3, and a few from the direct supply of tap water. And the water tank 3 supplies water to the water cup 2 every time, and then water is supplied for the next water supply. By combining the analysis, the energy storage and heat exchange can be better, so that the energy-saving effect is further improved.

The dishwasher provided by the embodiment realizes the switching between the water supply of the water tank 3 and the water supply of tap water through the matched arrangement of the block valve 4, the first water outlet 302 and the second water outlet 303, achieves the effect of energy conservation, and is beneficial to simplifying the structure and controlling and reducing the production cost.

In another embodiment of the present application, the first water outlet 302 is disposed at a set water level, when the stop valve 4 closes the second water outlet 303 and the water level of the water chamber reaches the set water level, the water exceeding the set water level overflows through the first water outlet 302 and enters the water cup 2 through the second water inlet.

It is not to be understood that the first water outlet 302 has a higher water level than the second water outlet 303. When the liquid level of the water body in the water cavity reaches the designed water level, the newly added water body automatically overflows from the first water outlet 302 to reach the water cup 2, and the arrangement can simplify the structure. In other embodiments, a water pump or the like may be used to deliver the water exceeding the designed water level to the water cup 2, which is not limited herein.

By adopting the dishwasher provided by the embodiment, the energy-saving effect can be realized through the following control method:

referring to fig. 2, a first control method includes the following steps:

a: judging whether the water level of the water in the water cavity reaches a set water level or not, wherein the water quantity of the water in the water cavity is N when the water level of the water in the water cavity reaches the set water level; if yes, executing step C; otherwise, executing step B.

B: and (4) filling the water cavity with the water body from the first water inlet 301 in the state that the cut-off valve 4 is closed, and then executing the step (A).

The step A and the step B ensure that the water tank 3 has the water inlet with the water quantity of N. In actual operation, the water tank 3 is left standing after water is supplied. Until the dishwasher enters a washing state, the water cup 2 needs to be filled with water. In other words, steps A and B ensure that the water tank 3 has a volume N when the water cup 2 needs to be filled.

C: and D, judging a water inlet demand Q, executing the step D when the water inlet demand Q is larger than N, and executing the step E when the water inlet demand Q is smaller than or equal to N.

D: water (Q-N) is fed into the water cup 2 through the first water inlet 301 and the first water outlet 302, then the stop valve 4 is opened, and water N is fed into the water cup 2 through the second water outlet 303.

E: and opening the stop valve 4, and feeding water Q into the water cup 2 through the second water outlet 303.

And C to E, realizing water inlet of the water cup 2. The water fed into the cup 2 is mainly from the water stored in the water tank 3. If the water quantity of the water tank 3 is not enough to meet the spraying and water inlet requirements of the water cup 2, tap water is connected for supplement. It should be noted that after the water tank 3 supplies water to the water cup 2, water is replenished by itself, and the water replenishing process is synchronized with the spraying operation.

F, spraying operation. The water body of the water cup 2 is conveyed to the spray arm 11 through the spraying system so as to spray and wash the tableware in the inner container 1.

G: counting the water inlet times of the water cup 2, and finishing washing when the water inlet times are equal to the set times; otherwise, executing the step A.

Generally, the washing of tableware by a dishwasher requires a plurality of spraying operations, and each spraying operation requires a water body for replenishment. Required water sprays every time, preferentially adopts the water of water intracavity, from external moisturizing again under the not enough condition of water intracavity, combines aforementioned analysis, and better energy storage and heat transfer can effectively be played in this setting to further improve energy-conserving effect. After the water in the water tank 3 is used for replenishing water to the water cup 2, the water in the water tank 3 needs to be replenished in time, so that the water in the water tank 3 can stand for more time, heat exchange is realized, the temperature is raised, and the next spraying and water replenishing is prepared.

Assuming that the dishwasher needs to perform three times of spraying operation for washing the tableware, the dishwasher is started to perform washing operation after the tableware is placed in the inner container. In the first spraying operation, the required water quantity Q is more than N, tap water (Q-N) is accessed, and then the stop valve 4 is opened to access the stored water N of the water tank 3. The water cup 2 performs first spraying operation after obtaining the water quantity Q; at the same time, the stored water N is switched back into the water tank 3. And after the first spraying operation is finished, carrying out second spraying operation. And (3) performing the second spraying operation, wherein the required water quantity Q is less than N, opening the stop valve 4, accessing the stored water Q of the water tank 3, performing the second spraying operation, and meanwhile, accessing the stored water (N-Q) into the water tank 3 to enable the stored water quantity in the water tank 3 to be N. And after the second spraying operation is finished, carrying out third spraying operation. And in the third spraying operation, the required water quantity Q is equal to N, the stop valve 4 is opened, the storage water Q of the water tank 3 is accessed, the third spraying operation is carried out, and meanwhile, the water tank 3 is accessed into the storage water N. And finishing the tableware washing operation.

Preferably, in step G, when the number of water intakes is equal to the set number, the washing is ended, and step H is performed: and (4) closing the cut-off valve 4, and filling water into the water cavity through the first water inlet 301 to enable the water volume in the water cavity to be N.

In other words, after the washing of the dishes is finished, the water body is replenished to the water tank 3. At this moment, 1 temperature of inner bag is higher than water tank 3, and inner bag 1 carries out the heat exchange with the water of water tank 3 and realizes the effect of heating of water in the water tank 3, and the water in this water tank 3 will be used for washing next time. In addition, the water tank 3 is in a low temperature state relative to the inner container 1, and can provide condensation and drying effects for the inner container 1.

In another embodiment of the present application, please refer to fig. 1, the dishwasher further includes a float level switch 5, and the float level switch 5 is used for detecting whether the water level in the water cavity reaches a set water level. When the floater of the floater liquid level switch 5 rises to a set water level along with the liquid level of the water cavity, the magnetic reed switch is closed, and a signal is sent to the controller. After receiving the signal, the controller closes the water inlet valve 9 and stops water inlet. At this time, the water volume in the water chamber is N. Through the setting of float liquid level switch 5, the water liquid level of the water intracavity is ensured to reach the set water level, so that the water capacity in the water intracavity is ensured to be not less than N.

By adopting the dishwasher provided by the embodiment, the energy-saving effect can be realized through the second control method:

referring to fig. 3, the second control method includes the following steps:

a: and D, judging a water inlet demand Q, executing the step B when the water inlet demand Q is larger than N, and executing the step E when the water inlet demand Q is smaller than or equal to N.

B: judging whether the water volume in the water cavity is N, if so, executing the step C; otherwise, executing step D.

C: water (Q-N) is fed into the water cup 2 through the first water inlet 301 and the first water outlet 302, then the stop valve 4 is opened, and water N is fed into the water cup 2 through the second water outlet 303; and then proceeds to step F.

D: and C, filling the water cavity with the water body from the first water inlet 301 in the state that the cut-off valve 4 is closed, and then executing the step B.

E: the cut-off valve 4 is opened, and water Q is fed into the water cup 2 through the second water outlet 303; and then proceeds to step F.

F: judging whether the actual water inflow of the water cup 2 reaches the rated water amount, if so, executing the step G; otherwise, executing the step A.

Step C and step D are for replenishing the water tank 3 to ensure that the water tank 3 has the design water volume N. Step A, D, E allows for the water to be drawn into the cup 2 since, in general, the water tank 3 is fully loaded during the washing operation of the dishwasher (after each washing, the water tank 3 is replenished so that the water tank 3 is fully loaded). Therefore, when the washing operation is started, the water inlet requirement of the water cup 2 is firstly judged, and the water inlet operation of the water cup 2 is directly carried out due to the fact that the water tank 3 is in a full-load state, so that the operation efficiency is improved.

G: and (5) spraying operation. The water body of the water cup 2 is conveyed to the spray arm 11 through the spraying system so as to spray and wash the tableware in the inner container 1.

H: counting the water inlet times of the water cup 2, and finishing washing when the water inlet times are equal to the set times; otherwise, executing the step A.

Preferably, in step H, when the number of water intakes is equal to the set number, the washing is ended, and step I: and (4) closing the cut-off valve 4, and filling water into the water cavity through the first water inlet 301 to enable the water volume in the water cavity to be N.

The second control method differs from the first control method in that the water inlet requirement of the water cup 2 is determined first and then the amount of water in the water tank 3 is determined. The skilled person can select a control method according to actual needs, or adjust the control method based on the dishwasher provided in this embodiment, which is not limited herein.

In another embodiment of the present application, the dishwasher further comprises a flow meter 6 for measuring the flow rate of the first water inlet 301. In practice, tap water is introduced into the tank 3, possibly for leakage or other reasons, with a difference between the amount of water introduced and the amount of water actually stored in the tank 3. The flow meter 6 is arranged to obtain the amount of water entering the water tank 3 from the first water inlet 301. When the water quantity entering the water tank 3 from the first water inlet 301 reaches the design requirement and the float liquid level switch 5 fails to send a signal to the controller, it indicates that the water quantity actually stored in the water tank 3 is smaller than the water inlet quantity, and at this time, an operator can reversely check whether the water inlet pipeline and the water tank 3 have the problem of water leakage. In the case where the float level switch 5 signals the controller and the amount of water measured by the flow meter 6 does not reach the design requirements, the tank 3 may have a portion of water left before replenishing. The person skilled in the art can perform a case-by-case handling on the basis of the measured value of the flow meter 6 and the detected deviation of the float level switch 5 in order to reduce the superposition of errors or to handle faults early.

In another embodiment of the present application, the dishwasher further comprises a pressure switch disposed at the second water outlet 303, and the pressure switch is closed to close the second water outlet 303 when the actual water inlet amount of the water cup 2 reaches the rated water amount. The pressure switch is used for detecting the actual inflow water amount reaching the water cup 2, when the inflow water amount does not reach the rated water amount, the pressure switch keeps on, the second water outlet 303 keeps on, and the washing pump 7 does not work. And (3) water is supplemented to the water cup 3, wherein the water can be stored in the water tank 3 or can be newly-connected tap water until the water inlet amount reaches the rated water amount. When the water inlet amount reaches the rated water amount, the pressure switch is closed to close the second water outlet 303, and the washing pump 7 starts to work to drive the water in the water cup 2 to be conveyed to the spray arm 11. In other words, the spraying operation can be carried out only when the actual water inlet amount reaches the rated water amount, so that the water amount required by the spraying operation is ensured to meet the design requirement.

Corresponding to the first control method, in the step F, whether the actual water inflow of the water cup 2 reaches the rated water amount is judged, if yes, spraying operation is carried out, and if not, the step A is executed, and water is supplemented to the water cup 2 until the actual water inflow of the water cup 2 reaches the design requirement.

In another embodiment of the present application, referring to fig. 1, the dishwasher further includes a drain pipe 8 for draining the water of the cup 2, the drain pipe 8 passing through the tank 3. It can be understood that after the water body of the water tank 3 enters the water cup 2, the water body is driven by the washing pump 7 to enter the spraying system to spray the tableware in the inner container 1, and the spraying water in the inner container 1 is collected at the water cup 2 and is discharged out of the dishwasher through the drainage pipeline 8 by the drainage pump 10. Because the water in the drainage pipeline 8 is formed by the convergence of spray water, the temperature of the water is higher than that of the water tank 3, the drainage pipeline 8 is wound through the water tank 3, so that the drainage pipeline 8 and the water in the water tank 3 exchange heat, and the energy-saving effect is further achieved.

It should be noted that the drainage pipeline 8 passes through the water tank 3, and the drainage pipeline 8 may penetrate through two opposite sides of the water tank 3, or may enter and exit the water tank 3 from the same side. The drain pipe 8 may extend straight or may extend in a curved or broken line.

In the configuration shown in fig. 1, the drain line 8 extends into the water tank 3 and is bent again and then leaves the water tank 3 from the same side. It will be appreciated that the connection of the drain line 8 to the tank 3 is watertight.

In another embodiment of the present application, referring to fig. 1, the dishwasher further includes a water softener having a resin chamber 13 and a regeneration chamber 12, and a direction changing valve for receiving the water of the water tank 3 from the first water outlet 302 or the second water outlet 303 and alternatively delivering the water to the resin chamber 13 and the regeneration chamber 12; wherein, the water body flows in one direction in the regeneration cavity 12 and the resin cavity 13 and flows into the second water inlet through the interface arranged on the regeneration cavity 12. The water body of the water tank 3 enters the reversing valve through the first water inlet 301 or the second water inlet. The reversing valve is provided with a first interface communicated with the resin cavity 13 and a second interface communicated with the regeneration cavity 12, and the first interface and the second interface are alternatively opened, so that water body is alternatively fed into the resin cavity 13 and the regeneration cavity 12. The water flowing into the regeneration chamber 12 flows to the water cup 2 through the resin chamber 13. The water flowing into the resin chamber 13 flows directly to the cup 2. Through the arrangement of the reversing valve, whether the water body flows through the regeneration cavity 12 or not is controlled, so that the structure and the control are simplified.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A dishwasher, comprising:

the water cup is provided with a second water inlet;

the cut-off valve is used for opening or closing the second water outlet;

2. The dishwasher of claim 1, wherein the first water outlet is located at the set water level, and when the shut-off valve closes the second water outlet and the water level in the water chamber reaches the set water level, water above the design water level overflows through the first water outlet and enters the water cup through the second water inlet.

3. The dishwasher of claim 1, further comprising a float level switch for detecting whether a water level of the body of water in the water chamber reaches a set level.

4. The dishwasher of claim 1, further comprising a flow meter for measuring the first water inlet flow.

5. The dishwasher of claim 1, further comprising a pressure switch disposed at the second water outlet, wherein the pressure switch is closed to close the second water outlet when the actual amount of inlet water into the water cup reaches a rated amount.

6. The dishwasher of claim 1, further comprising a drain line for draining the body of water of the water cup, the drain line passing through the tank.

7. The dishwasher of claim 1, further comprising a water softener having a resin chamber and a regeneration chamber, and a direction valve for accessing the water of the water tank from the first water outlet or the second water outlet and delivering the water to the resin chamber and the regeneration chamber alternatively; and the water body flows in the regeneration cavity and the resin cavity in a one-way manner and flows into the second water inlet through the interface arranged on the regeneration cavity.

8. A dishwasher control method adapted to the dishwasher according to any one of claims 1 to 7, comprising the steps of:

a: judging whether the water level of the water in the water cavity reaches a set water level or not, wherein when the water level of the water in the water cavity reaches the set water level, the water amount of the water in the water cavity is N; if yes, executing step C; if not, executing the step B;

f, spraying operation;

g: counting the water inlet times of the water cup, and finishing washing when the water inlet times are equal to the set times; otherwise, executing the step A;

9. the control method of a dishwasher according to claim 8, wherein in the step G, when the number of water inflows is equal to the set number, washing is finished, and the step H of: and closing the cut-off valve, and filling the water cavity with water through the first water inlet to ensure that the volume of the water in the water cavity is N.

10. The control method of a dishwasher according to claim 8, wherein in step F, it is judged whether the actual water inflow of the cup reaches the rated water amount, if yes, the spraying operation is performed, and then step G is performed; otherwise, executing the step A.