CN213787262U - Gas collection box, pneumatic liquid level detection device and dish washing machine - Google Patents

Abstract

The application relates to the technical field of dish-washing machines, and discloses a gas collection box for vapour-pressure type liquid level detection device, include: the box body and the vent pipe connected with the box body; the box body is of a hollow structure, an opening is formed in an area surrounded by a part in contact with the vent pipe, a water inlet is formed in the bottom surface, and other parts of the box body except the water inlet and the opening are of a closed structure; the position of breather pipe is higher than the bottom surface of box body, and the breather pipe links to each other with vapour-pressure type liquid level detection device's atmospheric pressure pipe, and vapour-pressure type liquid level detection device carries out the liquid level detection of container time measuring, and in the container was arranged in to the box body, the breather pipe extended to outside the container through the blow vent of container lateral wall, and the position of breather pipe is higher than the highest water level position in the container. Because the breather pipe is higher than the highest water level position, even this detection device leaks gas, the water level in the box body also can be less than the position of breather pipe, and water can't flow into this detection device's atmospheric pressure liquid level switch from the breather pipe to the problem of having avoided arousing atmospheric pressure liquid level switch to become invalid because of gas leakage.

Description

Gas collection box, pneumatic liquid level detection device and dish washing machine

Technical Field

The application relates to the technical field of dish washing machines, for example to a gas collection box for a gas pressure type liquid level detection device, a gas pressure type liquid level detection device for a dish washing machine and a dish washing machine.

Background

The dish washer is used to automatically clean tableware such as dish, chopsticks, dish, knife and fork. The related operations of the dishwasher are generally performed by detecting a level change of a water tank in the dishwasher. Therefore, the accuracy of detecting the water level change is very important for the dishwasher to complete basic functions. The existing methods for detecting the water level in the dish washer include air pressure type liquid level detection, floating ball type liquid level detection, electrode type electronic liquid level detection and the like, wherein the air pressure type liquid level detection is commonly used.

The structure of the existing pneumatic liquid level detection device usually comprises a gas collection box, a pneumatic conduit and a pneumatic switch, wherein the gas collection box is completely embedded in water, and the pneumatic switch or the interfaces at two ends of the pneumatic conduit can not completely ensure absolute sealing, so that a certain leakage amount exists in the whole gas compression passage. When the air pressure switch is used for a long time or a user does not empty the main washing water in the main washing water tank for a plurality of days continuously, the pressure of the compressed air is gradually reduced, so that the water surface in the air collection box is continuously raised until the air collection box is filled and the air pressure guide pipe is pressed, and even the water inlet failure of the air pressure liquid level switch is caused.

Therefore, the air pressure liquid level detection device in the existing dish washing machine has the problem that an air pressure liquid level switch fails due to gas leakage.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a gas collection box for a gas pressure type liquid level detection device, a gas pressure type liquid level detection device for a dish washing machine and the dish washing machine, and aims to solve the problem that a gas pressure type liquid level switch fails due to gas leakage of the gas pressure type liquid level detection device in the existing dish washing machine.

In some embodiments, the present disclosure provides a gas collection box for a pneumatic liquid level detection device, including: the box body and the vent pipe are connected with the box body; the box body is of a hollow structure, an opening is formed in an area surrounded by a part in contact with the vent pipe, a water inlet is formed in the bottom surface of the box body, and other parts of the box body except the water inlet and the opening are of a closed structure; the position of breather pipe is higher than the bottom surface of box body, the breather pipe with vapour-pressure type liquid level detection device's atmospheric pressure pipe links to each other, when vapour-pressure type liquid level detection device carried out the liquid level detection of container, the box body is arranged in the container, the breather pipe extends to through the blow vent of container lateral wall outside the container, the position of breather pipe is higher than the highest water level position in the container.

In some embodiments, the bottom surface of the box body is parallel to the horizontal plane, and the box body is of a long and narrow structure.

In some embodiments, when the pneumatic liquid level detection device detects the liquid level of the container, the distance between the bottom surface of the box body and the highest water level position is greater than or equal to the depth of water in the box body when the high water level of the pneumatic liquid level detection device is triggered.

In another aspect, an embodiment of the present disclosure provides a pneumatic liquid level detection device for a dishwasher, including a gas collection box, a pneumatic conduit, and a pneumatic switch; the air pressure guide pipe is connected with the air collection box and the air pressure switch; the gas collection box comprises a hollow box body and a vent pipe connected with the box body; the position of the vent pipe is higher than the bottom surface of the box body, an opening is arranged in an area surrounded by the contact part of the box body and the vent pipe, a water inlet is arranged on the bottom surface, other parts of the box body except the water inlet and the opening are of a closed structure, the box body is positioned on the inner side of a container with liquid level to be measured, and the vent pipe extends out of the container through a vent hole on the side wall of the container and is connected with the air pressure guide pipe; the vent is located above a maximum water level within the container.

In some embodiments, the bottom surface of the box body is parallel to the horizontal plane, and the box body is of a long and narrow structure.

In some embodiments, the distance from the bottom surface of the box body to the highest water level is greater than or equal to the depth of water in the box body when the high water level of the air pressure switch is triggered.

In another aspect, embodiments of the present disclosure provide a dishwasher, including: the water tank is internally provided with an overflow port, the side wall of the water tank is provided with a vent, and the position of the vent is higher than that of the overflow port; vapour-pressure type liquid level detection device, including gas collection box, atmospheric pressure pipe, atmospheric pressure switch, the atmospheric pressure pipe connection gas collection box and atmospheric pressure switch, the gas collection box include hollow box body and with the breather pipe that the box body links to each other, the position of breather pipe is higher than the bottom surface of box body, the box body with there is the opening in the region that the breather pipe contact part encloses, the bottom surface of box body is equipped with the water inlet, except the water inlet reaches outside the opening, other parts of box body are enclosed construction, the box body is located the water tank is inboard, the breather pipe passes through the blow vent stretches out the water tank, and with the atmospheric pressure pipe links to each other.

In some embodiments, the bottom surface of the box body is parallel to the horizontal plane, and the box body is of a long and narrow structure.

In some embodiments, the distance from the bottom surface of the box body to the overflow port is greater than or equal to the depth of water in the box body when the high water level of the air pressure switch is triggered.

In some embodiments, the distance between the vent and the overflow is ≧ 15 mm.

The utility model provides a gas collection box for vapour-pressure type liquid level detection device, a vapour-pressure type liquid level detection device and dish washer for dish washer that this disclosed embodiment provided can realize following technological effect:

the gas collection box comprises a box body and a vent pipe connected with the box body, the box body is of a hollow structure, an opening is arranged in an area surrounded by a part which is in contact with the vent pipe, a water inlet is arranged on the bottom surface, and other parts of the box body are of a closed structure except the water inlet and the opening; the position of breather pipe is higher than the bottom surface of box body, the breather pipe with vapour-pressure type liquid level detection device's atmospheric pressure pipe links to each other, vapour-pressure type liquid level detection device carries out the liquid level detection time measuring of container, the box body is arranged in the container, the breather pipe extends to through the blow vent of container lateral wall outside the container, the position of breather pipe is higher than the highest water level position in the container, consequently, even vapour-pressure type liquid level detection device leaks gas, the water level in the box body also can be less than the position of breather pipe, and water can't flow into vapour-pressure type liquid level detection device's atmospheric pressure liquid level switch from the breather pipe to avoided arousing the problem that atmospheric pressure liquid level switch became invalid because of gas leakage.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of a pneumatic liquid level detecting device provided in the prior art;

fig. 2 is a schematic structural diagram of a pneumatic liquid level detection device provided in an embodiment of the present disclosure.

Reference numerals:

100-a dishwasher;

101-air pressure type liquid level detection device;

1011-a gas collection box;

1012-pneumatic conduits;

1013-air pressure switch;

102-a water tank;

1021-a drain port;

1022-a drain bar;

1023-an overflow;

1024-vent;

1101-a cartridge;

1102-vent pipe.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Generally, as shown in fig. 1, a conventional air pressure type liquid level detecting device for a dishwasher includes an air collecting box 1011, an air pressure conduit 1012, and an air pressure switch 1013, wherein the air collecting box 1011 is completely buried in water with its opening downward, and when the water level rises, the water surface pushes air in the air collecting box 1011, and the air is compressed and introduced into an air chamber of the air pressure switch 1013 through the air pressure conduit 1012. The pressure sensing film in the air chamber firstly triggers the low water level contact to act under the corresponding trigger pressure, and when the water level continues to rise, the pressure in the air chamber continues to rise to trigger the high water level contact to act.

In the pneumatic liquid level detector 101 having such a structure, the interfaces at both ends of the pneumatic switch 1013 or the pneumatic conduit 1012 cannot be completely sealed, and thus a certain amount of leakage exists in the entire gas compression path. In the case of long-term use or continuous multi-day use by a user without emptying the main wash water in the main wash water tank 102, the pressure of the compressed air gradually decreases, which causes the water surface in the gas collecting box 1011 to continuously rise until the gas collecting box 1011 is filled and the pressure guide pipe 1012 is pressed, even causes the water inlet failure of the air pressure liquid level switch.

As shown in fig. 2, an embodiment of the present disclosure provides a gas collecting box 1011 for a pneumatic liquid level detecting device 101, a pneumatic liquid level detecting device 101 for a dishwasher 100, and a dishwasher 100, so as to solve the problem that a pneumatic liquid level switch fails due to gas leakage in the pneumatic liquid level detecting device 101 of the existing dishwasher 100.

The gas collection box 1011 that this disclosed embodiment provided includes: the ventilation device comprises a box body 1101 and a ventilation pipe 1102 connected with the box body 1101, wherein the box body 1101 is of a hollow structure, and an opening exists in an area surrounded by a part, which is in contact with the ventilation pipe 1102, of the box body 1101. In one embodiment, the opening size may be equal to the entire area size. The bottom surface of the box 1101 is provided with a water inlet, and the other parts of the box 1101 except the water inlet and the opening are of a closed structure. The position of the vent pipe 1102 is higher than the bottom surface of the box 1101, the vent pipe 1102 is connected with the pneumatic conduit 1012 of the pneumatic liquid level detection device 101, when the pneumatic liquid level detection device 101 detects the liquid level of a container, for example, when the liquid level of the water tank 102 of the dishwasher 100 is detected, the box 1101 is placed in the container, the vent pipe 1102 extends out of the container through a vent hole 1024 in the side wall of the container, and the position of the vent pipe 1102 is higher than the highest water level position in the container. In some embodiments, the bottom surface of the cassette 1101 is parallel to a horizontal plane, and the cassette 1101 is an elongated structure. Alternatively, the cassette 1101 may be cylindrical, conical, or rectangular parallelepiped in configuration. In one embodiment, the bottom surface is rectangular and the sidewalls of the cassette 1101 are vertical to the horizontal plane. In some embodiments, when the pneumatic liquid level detection device 101 detects the liquid level of a container, the distance from the bottom surface of the box 1101 to the highest water level position is greater than or equal to the depth of water in the box 1101 when the high water level of the pneumatic liquid level detection device 101 is triggered. When the container is the tank 102 of the dishwasher 100, such as the main wash tank 102, the highest water level position may be the position of the overflow port 1023 in the main wash tank 102. Wherein the overflow port 1023 may be provided on a side wall of the water tank 102 or, as shown in fig. 2, on a drain bar 1022 of the water tank 102. The drain rod 1022 may be a hollow structure and is inserted into the drain port 1021 of the tank 102. In some embodiments, the distance between the air vent 1024 and the overflow port 1023 can be set to 15mm or more, in order to avoid the height of the air collection box 1011 being too large to be easily installed, while satisfying the need to prevent water from entering the air pressure conduit 1012.

The gas collection box 1011 for the pneumatic liquid level detection device 101, the pneumatic liquid level detection device 101 for the dishwasher 100 and the dishwasher 100 provided by the embodiment of the disclosure can realize the following technical effects:

because the gas collection box 1011 comprises the box 1101 and the vent pipe 1102 connected with the box 1101, the box 1101 is a hollow structure, an opening is formed in an area surrounded by a part in contact with the vent pipe 1102, a water inlet is formed in the bottom surface, and except for the water inlet and the opening, other parts of the box 1101 are of a closed structure; the position of breather pipe 1102 is higher than the bottom surface of box 1101, breather pipe 1102 with vapour-pressure type liquid level detection device 101's atmospheric pressure pipe 1012 links to each other, when vapour-pressure type liquid level detection device 101 carried out the liquid level detection of container, box 1101 is arranged in the container, breather pipe 1102 extends to outside the container through the venthole 1024 of container lateral wall, breather pipe 1102's position is higher than the highest water level position in the container, therefore, even vapour-pressure type liquid level detection device 101 leaks gas, the water level in box 1101 also can be less than the position of breather pipe 1102, and water can't flow into vapour-pressure type liquid level detection device 101's atmospheric pressure liquid level switch from breather pipe 1102 to the problem of having avoided arousing atmospheric pressure liquid level switch to lose efficacy because of gas leakage.

The embodiment of the present disclosure further provides a pneumatic liquid level detection device 101 for a dishwasher 100, which includes a gas collection box 1011, a pneumatic conduit 1012, and a pneumatic switch 1013;

the air pressure conduit 1012 is connected with the air collecting box 1011 and the air pressure switch 1013;

the gas collection box 1011 comprises a hollow box body 1101 and a vent pipe 1102 connected with the box body 1101;

the position of the vent pipe 1102 is higher than the bottom surface of the box body 1101, an opening is formed in an area surrounded by a contact part of the box body 1101 and the vent pipe 1102, a water inlet is formed in the bottom surface, other parts of the box body 1101 are of a closed structure except the water inlet and the opening, the box body 1101 is positioned inside a container with a liquid level to be measured, the vent pipe 1102 extends out of the container through a vent hole 1024 in the side wall of the container and is connected with the air pressure conduit 1012, wherein the position of the vent hole 1024 is higher than the highest water level position in the container.

The bottom surface of the box 1101 is parallel to the horizontal plane, and the box 1101 is a long and narrow structure. Alternatively, the cassette 1101 may be cylindrical, conical, or rectangular parallelepiped in configuration. In one embodiment, the bottom surface is rectangular and the sidewalls of the cassette 1101 are vertical to the horizontal plane. In some embodiments, the distance from the bottom of the housing 1101 to the maximum water level is greater than or equal to the depth of water in the housing 1101 when the high water level of the gas pressure switch 1013 triggers.

When the container is the tank 102 of the dishwasher 100, such as the main wash tank 102, the highest water level position may be the position of the overflow port 1023 in the main wash tank 102. Wherein the overflow port 1023 may be provided on a side wall of the water tank 102 or, as shown in fig. 2, on a drain bar 1022 of the water tank 102. The drain rod 1022 may be a hollow structure and is inserted into the drain port 1021 of the tank 102. In some embodiments, the distance between the air vent 1024 and the overflow port 1023 can be set to 15mm or more, in order to avoid the height of the air collection box 1011 being too large to be easily installed, while satisfying the need to prevent water from entering the air pressure conduit 1012.

In another aspect, the disclosed embodiments also provide a dishwasher 100, including:

the water tank 102 is internally provided with an overflow port 1023, the side wall of the water tank 102 is provided with a vent port 1024, and the position of the vent port 1024 is higher than that of the overflow port 1023; the pneumatic liquid level detection device 101 comprises a gas collection box 1011, a pneumatic conduit 1012 and a pneumatic switch 1013, wherein the pneumatic conduit 1012 is connected with the gas collection box 1011 and the pneumatic switch 1013, the gas collection box 1011 comprises a hollow box 1101 and a vent pipe 1102 connected with the box 1101, the position of the vent pipe 1102 is higher than the bottom surface of the box 1101, an opening is formed in an area surrounded by a contact part of the box 1101 and the vent pipe 1102, a water inlet is formed in the bottom surface of the box 1101, except the water inlet and the opening, the other parts of the box 1101 are of a closed structure, the box 1101 is positioned inside the water tank 102, and the vent pipe 1102 extends out of the water tank 102 through the vent 1024 and is connected with the pneumatic conduit 1012.

In some embodiments, the bottom surface of the enclosure 1101 is parallel to a horizontal plane, and the enclosure 1101 is an elongated structure. Alternatively, the cassette 1101 may be cylindrical, conical, or rectangular parallelepiped in configuration. In one embodiment, the bottom surface is rectangular and the side walls of the box are vertical to the horizontal plane.

In some embodiments, the distance from the bottom of the box 1101 to the overflow port 1023 is greater than or equal to the depth of water in the box 1101 when the high water level of the air pressure switch 1013 triggers.

In some embodiments, the distance between the air vent 1024 and the overflow port 1023 is 15mm or more, which can be set to 15mm in order to avoid the height of the air collection box 1011 being too large to be easily installed and to satisfy the need of preventing water from entering the pneumatic conduit 1012.

Based on the structure and the installation mode of the gas collecting box 1011 provided by the embodiment of the present disclosure, even if the water surface in the gas collecting box 1011 rises due to the air leakage at the connection of the gas collecting box 1011, the air pressure conduit 1012 and the air pressure switch 1013 and the components themselves, the pipeline is completely communicated with the atmosphere in the limit situation, at this time, according to the principle of the communicating vessel, the highest water surface in the gas collecting box 1011 can only be at the same position as the overflow port 1023 of the main washing water tank 102 in the limit situation, and the water surface cannot rise continuously. The water in the main wash tank 102 cannot flow into the pneumatic conduit 1012, ensuring that there is no possibility of water flowing into the pneumatic switch 1013 causing the pneumatic switch 1013 to fail. Meanwhile, even if the high water level is not triggered due to air leakage caused by the fact that the main washing water is not emptied for multiple days, the air pressure switch 1013 can be restored to work in a mode of emptying the main washing water and refilling the water. The cost and the difficulty of door maintenance are reduced.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A gas collection box for a pneumatic liquid level detection device, comprising:

the box body and the vent pipe are connected with the box body;

the box body is of a hollow structure, an opening is formed in an area surrounded by a part in contact with the vent pipe, a water inlet is formed in the bottom surface of the box body, and other parts of the box body except the water inlet and the opening are of a closed structure;

the position of breather pipe is higher than the bottom surface of box body, the breather pipe with vapour-pressure type liquid level detection device's atmospheric pressure pipe links to each other, when vapour-pressure type liquid level detection device carried out the liquid level detection of container, the box body is arranged in the container, the breather pipe extends to through the blow vent of container lateral wall outside the container, the position of breather pipe is higher than the highest water level position in the container.

2. The gas collection box of claim 1, wherein the bottom surface of the box body is parallel to a horizontal plane, and the box body is of an elongated structure.

3. The gas collection box of claim 2, wherein when the pneumatic liquid level detection device detects the liquid level of a container, the distance from the bottom surface of the box body to the highest water level position is greater than or equal to the depth of water in the box body when the high water level of the pneumatic liquid level detection device is triggered.

4. A pneumatic liquid level detection device for a dish washing machine is characterized by comprising a gas collection box, a pneumatic conduit and a pneumatic switch;

the air pressure guide pipe is connected with the air collection box and the air pressure switch;

the gas collection box comprises a hollow box body and a vent pipe connected with the box body;

the position of the vent pipe is higher than the bottom surface of the box body, an opening is arranged in an area surrounded by the contact part of the box body and the vent pipe, a water inlet is arranged on the bottom surface, other parts of the box body except the water inlet and the opening are of a closed structure, the box body is positioned on the inner side of a container with liquid level to be measured, and the vent pipe extends out of the container through a vent hole on the side wall of the container and is connected with the air pressure guide pipe;

the vent is located above a maximum water level within the container.

5. The pneumatic liquid level detecting device of claim 4, wherein the bottom surface of the box body is parallel to a horizontal plane, and the box body is of a long and narrow structure.

6. The pneumatic liquid level detection device of claim 5, wherein the distance from the bottom surface of the box body to the highest water level is greater than or equal to the depth of water in the box body when the high water level of the pneumatic switch is triggered.

7. A dishwasher, comprising:

the water tank is internally provided with an overflow port, the side wall of the water tank is provided with a vent, and the position of the vent is higher than that of the overflow port;

vapour-pressure type liquid level detection device, including gas collection box, atmospheric pressure pipe, atmospheric pressure switch, the atmospheric pressure pipe connection gas collection box and atmospheric pressure switch, the gas collection box include hollow box body and with the breather pipe that the box body links to each other, the position of breather pipe is higher than the bottom surface of box body, the box body with there is the opening in the region that the breather pipe contact part encloses, the bottom surface of box body is equipped with the water inlet, except the water inlet reaches outside the opening, other parts of box body are enclosed construction, the box body is located the water tank is inboard, the breather pipe passes through the blow vent stretches out the water tank, and with the atmospheric pressure pipe links to each other.

8. The dishwasher of claim 7, wherein the bottom surface of the housing is parallel to a horizontal plane, the housing being of elongate configuration.

9. The dishwasher of claim 8, wherein the distance from the bottom surface of the tub to the overflow opening is greater than or equal to the depth of water in the tub when the high water level of the air pressure switch is triggered.

10. The dishwasher of claim 7, wherein the distance between the vent and the overflow is greater than or equal to 15 mm.

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