CN215650941U - Respirator and dish washing machine - Google Patents

Abstract

A breather and a dish washing machine relate to the technical field of kitchen appliances and are used for detecting the water level in the dish washing machine during water drainage, the dish washing machine comprises an inner container and a water tank communicated with the inner container, and the breather is arranged on the inner container; a drainage channel and a water level detection device are integrated on the respirator; one end of the drainage channel is communicated with the water tank, and the other end of the drainage channel is used for draining wastewater in the water tank; and the water level detection device is arranged on the drainage channel. The utility model integrates the water level detection device on the basis of the existing respirator, not only can not influence the work of other parts, but also ensures that the respirator has the function of detecting the water level. The utility model is used for cleaning tableware.

Description

Respirator and dish washing machine

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a respirator and a dish washing machine.

Background

In order to detect the wastewater discharge of the dish washing machine, a pressure component can be arranged at the bottom of a water tank of the dish washing machine at present. The pressure component needs to be communicated with the air chamber in the water tank through an air guide pipeline so as to detect the water level in the water tank. However, the above detection method requires a complex connection structure of a plurality of pipelines, and the air guide pipeline has a risk of poor sealing.

SUMMERY OF THE UTILITY MODEL

The utility model provides a respirator and a dish washing machine, which realize drainage detection on the respirator and are used for solving the problems of complex installation and detection error of a drainage detection device of the dish washing machine.

In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

in a first aspect, the present invention provides a respirator for use in a dishwasher; the dish washing machine comprises an inner container and a water tank communicated with the inner container; the respirator is arranged on the inner container of the dish washing machine; the respirator comprises a shell, a drainage channel and a water level detection device, wherein the drainage channel is formed in the shell, one end of the drainage channel is communicated with the water tank, and the other end of the drainage channel is used for draining wastewater in the water tank; the water level detection device is arranged on the drainage channel and used for detecting the water level in the drainage channel.

The respirator provided by the embodiment of the utility model is provided with the water level detection device, and the water level detection device is arranged on the drainage channel, so that the water level in the drainage channel can be detected. In this way, since the one end of the drain passage communicates with the water tank, when the water in the water tank is completely drained, the water in the drain passage is also drained, and therefore, when the water level detection device detects a decrease in the water level in the drain passage or the absence of water, it can be determined that the water in the water tank is completely drained. Compared with the prior art, the water level detection device that this application provided sets up in the respirator, then need not set up the air chamber in the basin, consequently, can avoid the pipe connection complicacy, reduces the leakage risk.

Furthermore, the drainage channel comprises a first drainage branch and a second drainage branch, the first drainage branch is communicated with the second drainage branch, and the drainage channel is in an inverted U shape; the water level detection device is arranged at the junction position of the first drainage branch and the second drainage branch.

Further, the water level detecting apparatus includes: and the liquid level sensor is arranged on the outer pipe wall of the drainage channel.

Further, the drainage channel is a light-transmitting pipeline; the water level detection device includes:

the guide rod is positioned in the drainage channel, and the first end of the guide rod is connected with the inner pipe wall of the drainage channel;

the shading floater is positioned in the drainage channel and sleeved on the guide rod; and the number of the first and second groups,

the photoelectric switch is at least partially positioned in the drainage channel and is arranged at the second end of the guide rod; the photoelectric switch comprises a transmitting end and a receiving end, and is in a first switch state when the receiving end receives light rays transmitted by the transmitting end; the photoelectric switch is also used for being in a second switch state when the light emitted by the emitting end is shielded by the shading floater; the first switching state is different from the second switching state;

the drainage channel comprises a drainage water outlet, the first end of the guide rod is close to the drainage water outlet, and the second end of the guide rod is far away from the drainage water outlet.

Further, the water level detecting apparatus includes:

the guide rod is positioned in the drainage channel, and the first end of the guide rod is connected with the inner pipe wall of the drainage channel;

the magnetic floater is positioned in the drainage channel and sleeved on the guide rod; and the number of the first and second groups,

the float switch is positioned in the drainage channel and is arranged at the second end of the guide rod; the float switch is used for being in a closed state when the distance between the magnetic float and the float switch is smaller than a preset threshold value; the float switch is also used for being in a turn-off state when the distance between the magnetic float and the float switch is greater than or equal to a preset threshold value; the drainage channel comprises a drainage water outlet, the first end of the guide rod is close to the drainage water outlet, and the second end of the guide rod is far away from the drainage water outlet.

Further, the respirator also includes: the water inlet channel is formed in the shell, the first end of the water inlet channel is used for being communicated with the inner container, and the second end of the water inlet channel is used for being connected with the water supply end; and the number of the first and second groups,

and the flowmeter is arranged on the water inlet channel.

Further, the respirator also includes:

the air pressure balancing channel is formed inside the shell, the first end of the air pressure balancing channel is communicated with the inner container, and the second end of the air pressure balancing channel is communicated with the external atmosphere; and the number of the first and second groups,

the blocking rib is positioned on the inner wall of the air pressure balancing channel;

the first end of the air pressure balance channel is close to the junction position of the first drainage branch and the second drainage branch, and the second end of the air pressure balance channel is far away from the junction position of the first drainage branch and the second drainage branch.

Further, the respirator also includes:

the anti-siphon channel is positioned in the respirator, the first end of the anti-siphon channel is communicated with the drainage channel, and the second end of the anti-siphon channel is communicated with the inside of the respirator and is communicated with the air pressure balance channel;

and the check sheet is movably arranged in the anti-siphon channel and is used for blocking or communicating the anti-siphon channel.

Further, the respirator also includes:

the air pressure channel is formed in the shell, the first end of the air pressure channel is communicated with the air pressure balance channel, and the second end of the air pressure channel is communicated with the anti-siphon channel;

the bulge is fixed in the anti-siphon channel and arranged at the inlet of the first end of the air pressure channel;

wherein, the check sheet is provided with a through hole, the check sheet is sleeved on the bulge through the through hole and can shield the inlet of the first end of the air pressure channel.

In a second aspect, the utility model provides a dishwasher, which is characterized by comprising an inner container and the respirator in any one of the technical schemes; the respirator is arranged on the inner container of the dish washing machine.

The dishwasher provided by the utility model comprises the respirator in any technical scheme, so that the same technical problems can be solved, and the same technical effects can be obtained.

Drawings

FIG. 1 is a view illustrating an internal structure of a dishwasher according to an embodiment of the present invention;

FIG. 2 is a block diagram of a respirator provided in accordance with an embodiment of the present invention;

FIG. 3 is a view of the internal structure of a respirator provided in accordance with an embodiment of the present invention;

FIG. 4 is a block diagram of a second embodiment of a respirator provided in accordance with an embodiment of the present invention;

FIG. 5 is a partially enlarged view of a first water level detecting device according to an embodiment of the present invention;

FIG. 6 is a partially enlarged view of a second water level detecting device according to an embodiment of the present invention;

FIG. 7 is a partially enlarged view of a third water level detecting device according to an embodiment of the present invention;

FIG. 8 is a perspective view of the internal structure of a respirator provided in accordance with an embodiment of the present invention;

FIG. 9 is a perspective view of the internal (to show the backstop) structure of the respirator provided by the present embodiment;

FIG. 10 is a cross-sectional view of a closed pneumatic channel according to an embodiment of the present invention;

fig. 11 is a cross-sectional view of an open pneumatic channel according to an embodiment of the present invention.

Reference numerals: 1000-inner container; 2000-water tank; 3000-respirator; 3100-a housing; 3200-a water level detection device; 3210-a guide bar; 3220-float switch; 3230-magnetic float; 3240-photoelectric switch; 3250-light blocking float; 3260-liquid level sensor; 3300-air pressure balance channel; 3310-stop rib; 3320 — a first end of a gas pressure equalization channel; 3330-a second end of the air pressure equalization channel; 3400-drainage channels 3400; 3410-first drain branch; 3420-second drainage branch; 3411-a drain inlet; 3412-a drainage outlet; 3500-anti-siphon channel; 3510-a first end of an anti-siphon channel; 3520-a second end of the anti-siphon channel; 3600-an air pressure channel; 3610 — a first end of the pneumatic channel; 3620 — a second end of the pneumatic channel; 3630-bumps; 3640-non-return sheet; 3641-through holes; 3700-water inlet channel; 3710-first end of water inlet channel; 3720-second end of water inlet channel; 3730-flow meter; 4000-water pump.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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. In the description of the present invention, unless otherwise specified, "a plurality" means two or more

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The application provides a dishwasher, as shown in fig. 1, comprising a shell (not shown in the figure), an inner container 1000 and a water tank 2000, wherein the inner container 1000 is arranged inside a shell 3100, a cleaning cavity is formed inside the inner container 1000, and the cleaning cavity is used for cleaning tableware. The water tank 2000 is disposed at the bottom of the inner container 1000 and is communicated with the washing chamber.

Since the dishes are washed with high-temperature water when the dishes are washed, the temperature in the washing chamber is high, which causes the air pressure inside the washing chamber to increase. In order to balance the air pressure inside and outside the washing chamber, as shown in fig. 1, the dishwasher further includes a breather 3000, and the breather 3000 is disposed on the sidewall of the inner tub 1000. As shown in fig. 2, an air pressure balance passage 3300 is formed inside the respirator 3000, a first end 3320 of the air pressure balance passage communicates with the cleaning chamber of the inner container 1000, and a second end 3330 of the air pressure balance passage communicates with the outside atmosphere.

Above-mentioned respirator 3000 communicates the inside and the outside of washing chamber through atmospheric pressure balanced passageway 3300, will wash the produced high temperature steam of intracavity washing and discharge to make atmospheric pressure and outside atmospheric pressure in the washing chamber keep balance, realize the normal cycle work of dish washer.

In order to reduce the discharge of the steam with higher temperature from the second end 3330 of the air pressure balance passage, as shown in fig. 3, the air pressure balance passage 3300 provided by the present application further includes a blocking rib 3310, and the blocking rib 3310 is disposed on the inner wall of the air pressure balance passage 3300, so as to increase the condensation area of the steam. Because the temperature in the respirator 3000 is lower than the temperature in the cleaning cavity, therefore, after the water vapor enters the respirator 3000, the water vapor is condensed into water drops due to temperature reduction, and the blocking ribs 3310 increase the condensation area of the water vapor, so that more water vapor can be condensed into water drops and flow back to the cleaning cavity along the air pressure balancing channel 3300, and the discharged water vapor is reduced, and the user is prevented from being scalded.

In some embodiments, the number of the above-mentioned blocking ribs 3310 may be one or more. Compare in setting up one and keep off muscle 3310, when setting up a plurality of fender muscle 3310, can further increase the condensation area of vapor to further reduce exhaust high temperature vapor, be favorable to further reducing the risk that the user was scalded.

In some embodiments, the ribs 3310 may be distributed in a regular pattern, for example, a plurality of arcuate patterns of the same arc. Or may be distributed in an irregular configuration, such as a plurality of arcuate configurations of varying degrees of curvature. Compare in the fender muscle 3310 that sets up the regular distribution, when setting up the fender muscle 3310 of irregular distribution, can be diversified arrange on atmospheric pressure balanced passageway 3300 for keep off muscle 3310 can contact high temperature vapor from a plurality of different position, further increase the area of condensing of vapor.

In some embodiments, as shown in fig. 4, the second end 3330 of the air pressure balance channel may be disposed directly above the housing 3100, as shown in fig. 2 and 3, or may be disposed on a side surface of the housing 3100, and when the second end 3330 of the air pressure balance channel is disposed on the side surface of the housing 3100, there may be one buffer structure for the rising water vapor, so as to further increase the condensation area of the water vapor and reduce the risk of scalding the user.

It should be noted that the above-mentioned respirator 3000 not only can be applied to a dishwasher, but also can be applied to a dishwasher that needs to be cleaned at a high temperature, and it is mainly to balance the air pressure inside and outside the washing chamber, so as to avoid the situation that the door body cannot be opened due to the negative pressure formed in the washing chamber.

In addition, since the capacity of the water tank 2000 is limited when the dishes are washed, it is necessary to discharge the sewage in the water tank 2000 in time. Therefore, as shown in fig. 3, the respirator 3000 includes a housing 3100, a drain passage 3400 is formed in the housing 3100, a first end 3410 of the drain passage communicates with the water tank 2000, and a second end 3420 of the drain passage is used to drain the waste water in the water tank 2000. The sewage in the water tank 2000 can be discharged in time through the water discharge passage 3400 to facilitate the circulation washing of the dishes.

As shown in fig. 3, a water level detection device 3200 is further provided in the drain passage 3400 so as to detect the sewage level in the water tank 2000 in real time.

When dish washer carries out the drainage, sewage can get into drainage channel 3400 by basin 2000, discharge by drainage channel 3400 again, the sewage water level in drainage channel 3400 can change this moment for install water level detection device 3200 on drainage channel 3400 is in different states, the different result of assay, thereby reach the purpose that detects the sewage water level in drainage channel 3400, when detecting out the sewage water level in drainage channel 3400, just also detected out the sewage water level in basin 2000 from the side.

In order to improve the detection accuracy, as shown in fig. 3, the drainage channel 3400 includes a first drainage branch 3410 and a second drainage branch 3420, one end of the first drainage branch 3410 is communicated with the water tank 2000, the other end of the first drainage branch 3410 is communicated with one end of the second drainage branch 3420, and the other end of the second drainage branch 3420 is used for draining the waste water in the water tank 2000. The first drainage branch 3410 and the second drainage branch 3420 form an inverted U-shaped structure, and the water level detecting device 3200 is installed at a junction between the first drainage branch 3410 and the second drainage branch 3420. The junction between the first drainage branch 3410 and the second drainage branch 3420 is a position where the two branches communicate with each other. Since both form an inverted U-shaped structure, the junction of the first drainage branch 3410 and the second drainage branch 3420 is located at the highest point of the inverted U-shaped structure.

The water level detection device 3200 is installed at other positions of the drain passage 3400, for example, at the inlet of the first drain branch 3410. When the water level detecting device 3200 is installed at the junction of the first drainage branch 3410 and the second drainage branch 3420, the position of the water level detecting device 3200 is higher, and the position of the inlet of the first drainage branch 3410 is lower, so that residual waste water is generated at the lower position, which may result in the water level detecting device 3200 obtaining a false detection result that the waste water is not completely discharged. And no residual waste water exists at a higher position (i.e. at the junction of the first drainage branch 3410 and the second drainage branch 3420), so that the water level detecting device 3200 does not produce a false detection result. Thereby enabling more accurate detection of the first and second water discharge branches 3410 and 3420 to enable higher detection accuracy.

In some embodiments, as shown in fig. 5, the water level detecting device 3200 includes a liquid level sensor 3260, the liquid level sensor 3260 is fixedly installed on an outer pipe wall of the drainage pipe (indicated by a dashed square in the figure), and the liquid level sensor 3260 obtains different capacitance values according to a change of the water level in the drainage channel 3400, so as to detect the water level in the drainage pipe.

Specifically, the capacitance C in the liquid level sensor 3260 is ═ S/d (where epsilon is the dielectric constant of the medium, S is the plate area, and d is the distance between the capacitor plates), the dielectric constants of water and air are different, the capacitance values sensed by the surface of the capacitor sensor in the water-free and water-free states are different, and the water-free and water-free states in the drainage pipeline are determined according to the difference in capacitance values, so that the function of drainage detection is realized.

The liquid level sensor 3260 has the advantages of simplicity in installation, sensitivity and accuracy in detection and the like. Wherein, the fixed mounting can be understood as sticking, screw fastening and the conventional technical means which can play the role of fixing.

In some embodiments, as shown in fig. 6, the water level detecting device 3200 includes a guide rod 3210, an optoelectronic switch 3240, and a light blocking float 3250, and the drainage channel 3400 further includes a drainage outlet 3412, where the drainage outlet 3412 is located at an end of the drainage pipeline that is not connected to the water pump 4000. The water drainage channel 3400 is made of light-transmitting materials, and the light transmittance is more than 50% so as to facilitate the work of the photoelectric switch 3240.

The guide rod 3210 is disposed in the drain passage 3400, a first end of the guide rod 3210 is adjacent to the drain inlet 3412 and connected to an inner wall of the drain passage 3400, the light blocking float 3250 is fitted over the guide rod 3210, and the light blocking float 3250 floats up and down with a change in water level in the drain passage.

As shown in fig. 6, at least a portion of the photoelectric switch 3240 is located in the drainage channel 3400 and is installed at a second end of the guide rod 3210 far from the drainage inlet 3412, the photoelectric switch 3240 includes an emitting end and a receiving end, and the photoelectric switch 3240 emits two different signals when the receiving end can receive or cannot receive the light emitted from the emitting end.

When water is in the water drainage channel 3400, the shading floater 3250 rises along with the water, reaches the position of the photoelectric switch 3240, and blocks light (namely, the receiving end cannot receive the light emitted by the emitting end), and at the moment, the photoelectric switch 3240 is in a first switch state, detects that water is in the water drainage channel 3400, and sends a first signal to instruct the dishwasher to continue the water drainage operation.

When no water exists in the drainage channel 3400, the shading floater 3250 descends along with the water, is far away from the position of the photoelectric switch 3240, does not shade light (namely, the receiving end can receive the light emitted by the emitting end), is in a second switch state at the moment, the photoelectric switch 3240 can send a second signal, and when the signal is received by the dish washing machine, the dish washing machine sends an instruction to close the drainage function. The dishwasher then completes the washing or enters the next stage of washing.

The photoelectric switch 3240 may be a diffusion type photoelectric switch, a mirror reflection type photoelectric switch, a correlation type photoelectric switch, or a groove type photoelectric switch, and the kind is not limited, and may be specifically selected according to actual situations.

For example, when the photoelectric switch 3240 is a correlation type photoelectric switch, the emitting end and the receiving end of the photoelectric switch 3240 are respectively installed at the opposite positions of the two sides of the respirator 3000, since the respirator 3000 is made of a light-transmitting material and can transmit light, when water exists in the drainage channel 3400, the light blocking float 3250 rises along with the respirator to reach the position of the photoelectric switch 3240 and blocks the light emitted by the emitting end, at this time, the receiving end cannot receive the light emitted by the emitting end, the photoelectric switch is in a first switch state, water in the drainage channel 3400 is detected, and the photoelectric switch 3240 emits a first signal to instruct the dishwasher to continue the drainage operation.

When no water exists in the drainage channel 3400, the shading floater 3250 descends along with the water, the shading floater 3250 is far away from the position of the photoelectric switch 3240 and does not shade light any more, the receiving end of the photoelectric switch 3240 can receive the light emitted by the emitting end at the moment, the photoelectric switch 3240 is in a second switch state, the photoelectric switch 3240 can emit a second signal, and when the dishwasher receives the signal, the dishwasher can emit an instruction to close the drainage function. The dishwasher then completes the washing or enters the next stage of washing.

The light blocking float 3250 can be any device that blocks light and is suitable for use herein.

By adopting the water level detection device 3200, the installation process is simpler, more detection devices can be selected, and the detection result is accurate.

In some embodiments, as shown in fig. 7, the water level detecting device 3200 includes a guide rod 3210, a float switch 3220, a magnetic float 3230, and the drain passage 3400 further includes a drain inlet 3412.

The guide rod 3210 is disposed in the drainage channel 3400, a first end of the guide rod 3210 is adjacent to the drainage water inlet 3412 and connected to an inner wall of the drainage channel 3400, and the magnetic float 3230 is sleeved on the guide rod 3210, and the magnetic float 3230 floats up and down with a change in water level in the drainage pipeline.

As shown in fig. 7, the float switch 3220 is located in the drainage channel 3400 and is installed at a second end of the guide rod 3210 far from the drainage water inlet 3412, and the float switch 3220 is influenced by the magnetic float 3230, so that the float switch 3220 is switched on and off along with the approach or the distance of the magnetic float 3230, and then sends a signal.

Specifically, when the distance between the magnetic float 3230 and the float switch 3220 is less than a preset threshold, the float switch 3220 is in an on state. At this time, the float switch 3220 will issue a drain command and the dishwasher will continue draining.

When the distance between the magnetic float 3230 and the float switch 3220 is greater than or equal to a preset threshold value, the float switch 3220 is in an off state. At this time, the float switch 3220 gives a drain completion instruction, and the dishwasher completes washing or enters washing of the next stage. By adopting the water level detection device 3200, the detection principle is simple, the installation of the water level detection device 3200 is simple, and the detection result is accurate.

Accordingly, after the sewage is discharged, the discharged sewage is prevented from being siphoned back to the water tank 2000 and the cleaning chamber due to the difference between the internal and external air pressures. As shown in fig. 8, the respirator 3000 that this application provided still includes anti-siphon passageway 3500, anti-siphon passageway 3500 forms inside casing 3100, anti-siphon passageway's first end 3510 intercommunication drainage channel 3400, anti-siphon passageway's second end 3520 and atmospheric pressure balance passageway 3300 intercommunication, can balance the inside and outside atmospheric pressure of drainage channel 3400 through anti-siphon passageway 3500, when the drainage is about to end, pressure in drainage channel 3400 can reduce, can communicate outside atmospheric pressure through anti-siphon passageway 3500 this moment, make inside and outside pressure balance, make sewage can not flow back, thereby avoid sewage to get into the cleaning chamber, lead to the tableware contaminated.

In addition, in order to prevent the discharged sewage from entering the air pressure balance passage 3300 through the anti-siphon passage 3500 during the water discharge, as shown in fig. 8 and 9, the respirator 3000 further includes a check sheet 3640, and the check sheet 3640 is movably disposed in the anti-siphon passage 3500. For blocking or communicating the anti-siphon channel 3500.

During drainage, sewage in the drainage channel 3400 enters the anti-siphon channel 3500 and reaches the non-return sheet 3640, and at the moment, the non-return sheet 3640 blocks the anti-siphon channel 3500, so that the sewage is prevented from entering the air pressure balance channel 3300.

After the drainage is finished, the non-return sheet 3640 is communicated with the anti-siphon channel 3500, and at the moment, the air pressure in the drainage channel 3400 is balanced with the external air pressure, so that the phenomenon that the external air pressure presses the sewage in the drainage channel 3400 back to the water tank 2000 and the cleaning cavity can be avoided, and the tableware is prevented from being polluted.

Specifically, as shown in fig. 9 and 10, the respirator 3000 further includes an air pressure channel 3600 and a protrusion 3630, the air pressure channel 3600 is formed in the housing 3100, a first end 3610 of the air pressure channel is communicated with the air pressure balancing channel 3300, a second end 3620 of the air pressure channel is communicated with the anti-siphon channel 3500, and the protrusion 3630 is fixed in the anti-siphon channel 3500 and disposed at an inlet of the second end 3620 of the air pressure channel. And the check plate 3640 is provided with a through hole 3641, the check plate 3640 is sleeved on the protrusion 3630 through the through hole 3641, and the check plate 3640 can shield the inlet of the second end 3620 of the air pressure passage.

When water is drained, as shown in fig. 10, due to the effect of the water pressure of the drainage, water entering the anti-siphon channel 3500 compresses the non-return sheet 3640 at the inlet of the second end 3620 of the air pressure channel, so that the non-return sheet 3640 blocks the communication between the anti-siphon channel 3500 and the air pressure channel 3600, and further, sewage is prevented from entering the air pressure balancing channel 3300 through the air pressure channel 3600, and thus, the sewage is prevented from entering the cleaning chamber.

When the drainage is completed, as shown in fig. 11, the air pressure in the drainage passage 3400 decreases, and therefore, the air pressure in the air pressure equalizing passage 3300 is higher than the air pressure in the drainage passage 3400 and the anti-siphon passage 3500. At this time, the check plate 3640 is pushed away from the inlet of the second end 3620 of the air pressure passage by the air pressure, so that the air pressure equalizing passage 3300 is communicated with the anti-siphon passage 3500, i.e., with the drain passage 3400. Thus, the non-return sheet 3640 of the drain passage 3400 no longer shields the inlet of the second end 3620 of the air pressure passage, and the air pressure in the drain passage 3400 is balanced with the external air pressure by the drain passage 3400, thereby achieving the anti-siphon purpose.

On this basis, as shown in fig. 2 and 3, the respirator 3000 provided by the present application further includes a water inlet passage 3700, the water inlet passage 3700 is formed inside the housing 3100, a first end 3710 of the water inlet passage is used for communicating with the cleaning cavity of the liner 1000, and a second end 3720 of the water inlet passage is used for connecting a water supply end, which is connected to a water source, for example: tap water. The water inlet channel 3700 is also internally provided with a flow meter 3730, the flow meter 3730 is electrically connected with a control module of the dish washing machine to monitor the flow of water entering the water inlet channel 3700, when the water flow reaches a set threshold value, the control circuit controls the valve to be closed, and then the subsequent washing and water discharging work is started, and the work is circulated until the water is cleaned.

The above is a detailed description of a specific structure of the dishwasher provided in the present application. The method of using the dishwasher will be described in detail below.

When the dishwasher is in use, a user puts tableware to be washed into the inner tub 1000 and starts the dishwasher to operate. Wherein, the washing work generally includes three stages or more than three stages of pre-washing, main washing and rinsing, and under the detection of the flow meter 3730, an external water source enters the dishwasher through the water supply end to start the washing work.

In the washing process, the washing sewage is stored in the water inlet tank 2000, and when a certain amount of sewage is stored in the water tank 2000, the drainage process is started. The water in the water tank 2000 is supplied to the drain passage 3400 by the drain pump 4000, and at this time, the water level in the drain passage 3400 is detected by the water level detecting device 3200 installed in the drain passage 3400.

Specifically, if the state in the drain line is changed from the gas state to the liquid state within the set time (5S), it is verified that the drain is normal, the drain pump 4000 continues to operate, and if the state detected within the set time (5S) is not changed, it is verified that the drain is abnormal. When the drainage is normal, after the drainage pump 4000 continues to operate for a set time (60S), the water level detection unit 3200 installed in the drainage passage 3400 detects the water level again, and if the liquid state is detected to be changed into the gas state, the drainage is normal, and if the liquid state is not detected to be changed into the gas state, the drainage alarm is issued. Under the condition of normal drainage, the drainage process is finished after the drainage pump 4000 continues to work for a set time (5-15S).

The gas state detected by the water detection device means that only air is present in the drain passage 3400, that is, the water level in the drain passage 3400 is lowered and the discharge of water is not detected.

In addition, each washing stage is independent, and the next stage is performed only when the previous stage is completed, where the completion means the completion of the draining process.

That is, the washing process of the dishwasher is, the first stage: water inlet, prewashing and water discharge, and the second stage is as follows: water feeding, main washing and water discharging, and the third stage: water feeding, rinsing and water discharging. Only when the drainage of the current stage is normal, the next stage is entered.

Therefore, on one hand, dirty sewage after washing in the machine can be prevented from being discharged to participate in washing in the next stage, the washing is not clean, the water quantity is also prevented from being too large, energy consumption during heating is too high, on the other hand, the problem that the water level is too high is avoided as each stage is used for discharging water, and the problem that the water overflows to a kitchen of a user can be effectively avoided.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A respirator, characterized in that the respirator is applied to a dishwasher; the dishwasher comprises an inner container and a water tank communicated with the inner container; the respirator is mounted on the inner container of the dishwasher; the respirator includes:

a housing;

the drainage channel is formed in the shell, one end of the drainage channel is communicated with the water tank, and the other end of the drainage channel is used for discharging wastewater in the water tank; and the number of the first and second groups,

and the water level detection device is arranged on the drainage channel and is used for detecting the water level in the drainage channel.

2. The respirator of claim 1, wherein the drain passage comprises a first drain branch and a second drain branch, the first drain branch and the second drain branch being in communication, the drain passage being in the shape of an inverted U;

the water level detection device is arranged at the junction position of the first drainage branch and the second drainage branch.

3. The respirator according to claim 1 or 2, wherein the water level detection means comprises:

and the liquid level sensor is arranged on the outer pipe wall of the drainage channel.

4. The respirator of claim 1 or 2, wherein the drainage channel is a light transmissive conduit; the water level detection apparatus includes:

the guide rod is positioned in the drainage channel, and the first end of the guide rod is connected with the inner pipe wall of the drainage channel;

the shading floater is positioned in the drainage channel and sleeved on the guide rod; and the number of the first and second groups,

the photoelectric switch is arranged at the second end of the guide rod; the photoelectric switch comprises a transmitting end and a receiving end, and the photoelectric switch is in a first switch state when the receiving end receives the light rays transmitted by the transmitting end; the photoelectric switch is also used for being in a second switch state when the light rays emitted by the emitting end are shielded by the shading floater; the first switching state is different from the second switching state.

5. The respirator according to claim 1 or 2, wherein the water level detection means comprises:

the guide rod is positioned in the drainage channel, and the first end of the guide rod is connected with the inner pipe wall of the drainage channel;

the magnetic floater is positioned in the drainage channel and sleeved on the guide rod; and the number of the first and second groups,

the float switch is positioned in the drainage channel and is arranged at the second end of the guide rod; the float switch is used for being in an open state when the distance between the magnetic float and the float switch is smaller than a preset threshold value; the float switch is also used for being in a turn-off state when the distance between the magnetic float and the float switch is larger than or equal to a preset threshold value.

6. The respirator of claim 1, further comprising:

the water inlet channel is formed in the shell, a first end of the water inlet channel is communicated with the inner container, and a second end of the water inlet channel is connected with a water supply end; and the number of the first and second groups,

and the flowmeter is arranged on the water inlet channel.

7. The respirator of claim 1, further comprising:

the air pressure balance channel is formed inside the shell, a first end of the air pressure balance channel is communicated with the inner container, and a second end of the air pressure balance channel is communicated with the external atmosphere; and the number of the first and second groups,

and the blocking rib is positioned on the inner wall of the air pressure balance channel.

8. The respirator of claim 7, further comprising:

the anti-siphon channel is positioned in the respirator, the first end of the anti-siphon channel is communicated with the drainage channel, and the second end of the anti-siphon channel is communicated with the air pressure balancing channel;

and the check sheet is movably arranged in the anti-siphon channel and is used for blocking or communicating the anti-siphon channel.

9. The respirator of claim 8, further comprising:

the air pressure channel is formed in the shell, the first end of the air pressure channel is communicated with the air pressure balance channel, and the second end of the air pressure channel is communicated with the anti-siphon channel;

the bulge is fixed in the anti-siphon channel and arranged at the inlet of the first end of the air pressure channel;

the check sheet is sleeved on the protrusion through the through hole and can shield the inlet of the first end of the air pressure channel.

10. A dishwasher, comprising a liner, and a respirator as claimed in any one of claims 1 to 9; the respirator is mounted on the outer wall of the inner container.

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