CN218606504U

CN218606504U - Dish washing machine

Info

Publication number: CN218606504U
Application number: CN202222650229.2U
Authority: CN
Inventors: 黄书庆; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-03-14
Anticipated expiration: 2032-10-08

Abstract

The utility model relates to the technical field of household appliances, in particular to dish washing machine. The dishwasher comprises a dishwasher body, an air pressure sensor and a buffer, wherein the dishwasher body is provided with a liquid collecting cavity and a liquid level measuring cavity which are communicated; the air pressure sensor is communicated with the liquid level measuring cavity and is configured to detect the liquid level of water in the liquid collecting cavity; the buffer comprises a buffer component, the buffer component is arranged between the dishwasher body and the air pressure sensor, a buffer inner cavity is arranged in the buffer component, and liquid buffer media are filled in the buffer inner cavity; the buffer is configured to enable the liquid buffer medium to flow to the air pressure sensor when the flow rate of the gas in the liquid level measurement cavity flowing to the buffer is larger than a preset value, so that the pressure of the gas is buffered, and the detection accuracy of the air pressure sensor is improved. The utility model discloses a dish washer for make baroceptor be difficult for being triggered by mistake.

Description

Dish washing machine

Technical Field

The utility model relates to the technical field of household appliances, in particular to dish washing machine.

Background

With the continuous improvement of the quality of life of people, the dish washing machine becomes one of the indispensable household appliances. The dish washer usually has a liquid collecting cavity, and the cavity wall of the liquid collecting cavity is provided with a water suction port which is communicated with a circulating water pump, and the circulating water pump conveys water to a spray arm of the dish washer so as to spray and clean tableware. In the washing process, a certain amount of water needs to be stored in the liquid collecting cavity, the water amount is not too much or too little, particularly, the water amount is not too much, if the water amount is too much, the water can overflow out of the dishwasher, and a larger problem caused by water leakage of the dishwasher can occur, so that high liquid level protection is usually indispensable in the dishwasher.

The existing high liquid level protection is usually realized by detecting air pressure through an air pressure sensor to judge the liquid level of a liquid collecting cavity, an air chamber (or called a liquid level measuring cavity) is formed in the liquid collecting cavity of the dish washing machine, when water enters the liquid collecting cavity, a certain amount of air is sealed in the air chamber, an air outlet is arranged at the top of the air chamber and is communicated with the air pressure sensor through a hose, so that the air pressure sensor can detect the air pressure in the air chamber in real time to judge the liquid level of the liquid collecting cavity; in concrete application, the liquid level in the liquid collection cavity is higher, the air pressure in the air chamber is higher, when the air pressure reaches the set value of the air pressure sensor, the air pressure sensor can be triggered, high liquid level protection is started, the dish washing machine is stopped from water inlet, or drainage is started to enable the liquid level in the liquid collection cavity to be reduced to a proper liquid level.

However, the existing air pressure sensor is unstable in work and easy to be triggered by mistake, and particularly, when a door of the dish washing machine is closed quickly, the air communicating port formed in the wall of the liquid collecting cavity cannot balance air pressure quickly, so that water in the liquid collecting cavity can push air in the liquid level measuring cavity to flow to the air pressure sensor, the air pressure in the air chamber is increased, the air pressure sensor is triggered by mistake, the air pressure is mistakenly taken as the set value of the air pressure sensor, and the water inlet of the dish washing machine is stopped or the water drainage is started.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a dish washer for when the gas in the water promotion level measurement chamber flows to baroceptor and the velocity of flow is greater than the default, the buffer enables liquid buffer medium and flows to baroceptor, with buffer gas's pressure, increases the degree of accuracy that baroceptor detected, makes baroceptor be difficult for being triggered by the mistake.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a dish washer, include:

the dishwasher comprises a dishwasher body, a dish washing machine and a dish washing machine, wherein the dishwasher body is provided with a liquid collecting cavity and a liquid level measuring cavity, and the bottom of the liquid level measuring cavity is communicated with the liquid collecting cavity;

the air pressure sensor is communicated with the liquid level measuring cavity and is configured to detect the air pressure in the liquid level measuring cavity so as to determine the liquid level in the liquid collecting cavity;

the buffer comprises a buffer component, the buffer component is arranged between the dishwasher body and the air pressure sensor, a buffer inner cavity is arranged in the buffer component, and liquid buffer media are filled in the buffer inner cavity;

the buffer is configured to enable the liquid buffer medium to flow to the air pressure sensor when the flow rate of the gas in the liquid level measurement cavity flowing to the buffer is larger than a preset value, so that the pressure of the gas is buffered, and the detection accuracy of the air pressure sensor is improved.

The utility model discloses an among the embodiment, the buffer still includes the separator, sets up in buffering inner chamber to separate buffering inner chamber for first inner chamber and second inner chamber, the separator is equipped with medium flow opening, and liquid buffer medium fills in first inner chamber, and when the velocity of flow of the gas flow in the level measurement chamber to the buffer was greater than the default, liquid buffer medium flowed in the second inner chamber by first inner chamber through medium flow opening.

In the embodiment of the utility model, the buffer also comprises an installation cavity, an air inlet, an air outlet, a first blocking piece and a second blocking piece, wherein the air inlet and the air outlet are both communicated with the installation cavity, the air inlet is also communicated with the liquid level measuring cavity, and the air outlet is also communicated with the air pressure sensor; the first blocking part and the second blocking part are both arranged on the cavity wall of the installation cavity in a sealing mode, a buffer inner cavity is formed between the first blocking part and the second blocking part, and the first blocking part and the second blocking part are both made of elastic materials.

In an embodiment of the present invention, the elastic material is polytetrafluoroethylene, polyurethane or rubber.

The utility model discloses an among the embodiment, still include first connecting pipe and second connecting pipe, the air inlet is linked together through first connecting pipe and level measurement chamber, and the gas outlet is linked together through second connecting pipe and baroceptor.

In an embodiment of the present invention, the liquid buffer medium is hydraulic oil.

In an embodiment of the present invention, the hydraulic oil is synthetic hydraulic oil.

The utility model discloses an among the embodiment, the dish washer body is equipped with the drinking cup part, and the drinking cup part includes the cup and divides the chamber spare, and the cup is installed in the lower part of dish washer body, divides the chamber spare to be located the cup, and divides the internal perisporium of cup is connected to the one end of chamber spare, divides the other end of chamber spare to extend to the lower wall of cup to be the internal partitioning of cup for album liquid chamber and level measurement chamber.

In an embodiment of the present invention, the volume of the liquid buffer medium is not less than 90% of the volume of the buffer cavity.

The utility model discloses an in the embodiment, still include gas pressure regulating valve, set up between buffer and baroceptor.

The utility model has the characteristics and advantages that:

the buffer inner cavity of the buffer component is filled with liquid buffer medium, when the flow velocity of gas in the liquid level measurement cavity flowing to the buffer is larger than a preset value, the liquid buffer medium can flow to the air pressure sensor, namely, the pressure of the gas is difficult to change rapidly, the air pressure sensor is difficult to be triggered mistakenly, for example, when a door of a dishwasher is closed rapidly, water in the liquid collecting cavity can push the gas in the liquid level measurement cavity to flow to the air pressure sensor, the liquid buffer medium can obstruct the flow of the gas to a certain extent, the pressure of the gas is reduced, the pressure of the buffer gas is played, therefore, the air pressure in the liquid level measurement cavity is difficult to increase rapidly to trigger the air pressure sensor, and the detection accuracy of the air pressure sensor is improved.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic view of a dishwasher according to the present invention.

Fig. 2 is a schematic perspective view of the buffer of the present invention.

Fig. 3 is a cross-sectional view of the damper of the present invention along the axial direction thereof.

Reference numerals and description:

1. a dishwasher body; 11. a cup component; 111. a cup body; 1111. a liquid collection cavity; 1112. a liquid level measurement chamber; 112. a chambering member; 2. an air pressure sensor; 3. a buffer; 31. a buffer member; 32. a buffer cavity; 321. a first lumen; 322. a second lumen; 33. a liquid buffer medium; 34. a mounting cavity; 35. an air inlet; 36. an air outlet; 37. a first barrier; 38. a second barrier; 4. water; 5. a separator; 51. a medium flow port; 6. a first connecting pipe; 7. a second connecting pipe; 8. and a door.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

As shown in fig. 1 to 3, the present invention provides a dishwasher, which comprises a dishwasher body 1, an air pressure sensor 2 and a buffer 3, wherein the dishwasher body 1 has a liquid collecting chamber 1111 and a liquid level measuring chamber 1112 (or air chamber) which are communicated with each other; the air pressure sensor 2 is communicated with the liquid level measuring cavity 1112 and is configured to detect the air pressure in the liquid level measuring cavity 1112 so as to determine the liquid level in the liquid collection cavity 1111; the buffer 3 comprises a buffer part 31, the buffer part 31 is arranged between the dishwasher body 1 and the air pressure sensor 2, a buffer inner cavity 32 is arranged in the buffer part 31, and a liquid buffer medium 33 is filled in the buffer inner cavity 32; wherein, the buffer 3 is configured to make the liquid buffer medium 33 flow to the air pressure sensor 2 when the flow rate of the gas in the liquid level measurement cavity 1112 to the buffer 3 is larger than the preset value, so as to buffer the pressure of the gas and increase the detection accuracy of the air pressure sensor 2.

The utility model discloses a dishwasher, it has liquid buffer medium 33 to fill in the buffering inner chamber 32 of buffer part 31, gas in water 4 promotion level measurement chamber 1112 flows to baroceptor 2 and the velocity of flow is greater than the default, under gaseous effect, liquid buffer medium 33 can flow to baroceptor 2, that is, it separates liquid buffer medium 33 between level measurement chamber 1112 and baroceptor 2, make the difficult rapid change of gaseous pressure, make baroceptor 2 be difficult for being triggered by the mistake, for example, when closing dishwasher's door 8 rapidly, water 4 in collecting chamber 1111 can promote the gas in level measurement chamber 1112 to flow to baroceptor 2, liquid buffer medium 33 can obstruct the flow of this gas to a certain extent, reduce the pressure of this gas, play the effect of buffer gas's pressure, therefore, the difficult rapid increase of atmospheric pressure in level measurement chamber 1112 and trigger baroceptor 2, the degree of accuracy that increase baroceptor 2 detected. The specific size of the preset value is not limited herein, and may be a gas flow rate when the door 8 is closed quickly, or a gas flow rate when the water sprayed by the spray arm is vaporized after the door 8 is closed, that is, the preset value is generally a gas flow rate when the water 4 pushes the gas in the liquid level measurement cavity 1112 to flow to the gas pressure sensor 2 when the dishwasher is not water-feeding.

It can be understood that when the dishwasher is water-feeding (for example, the water-feeding speed is not more than 4L/min in general), the air in the liquid level measuring chamber 1112 communicated with the liquid collecting chamber 1111 will compress the air due to the rising liquid level, so that the air will flow towards the air pressure sensor 2, because the buffer part 31 is disposed between the dishwasher body 1 and the air pressure sensor 2, the air will contact with the buffer part 31, the liquid buffer medium 33 in the buffer inner chamber 32 can flow towards the air pressure sensor 2 to press the air upstream of the air pressure sensor 2, and therefore, the air pressure sensor 2 can determine the actual liquid level according to the detected air pressure upstream.

Furthermore, compared with the prior art, the utility model discloses the detection speed and the degree of accuracy that baroceptor 2 was adjusted to the liquid buffer medium 33 of the different viscosity coefficients of accessible replacement, convenient regulation, and simple structure.

Further, the volume of the liquid buffer medium 33 may be not less than 90% of the volume of the buffer cavity 32.

In particular, the liquid buffer medium 33 may be hydraulic oil, and in a specific application, the viscosity coefficient may be controlled by different types of hydraulic oil, so as to further facilitate adjustment. The hydraulic oil can be mineral oil hydraulic oil (or mineral oil hydraulic oil), emulsified hydraulic oil or synthetic hydraulic oil.

More specifically, the hydraulic oil may be synthetic hydraulic oil, and in specific applications, the synthetic hydraulic oil has better low-temperature and high-temperature properties than mineral oil hydraulic oil, and is adaptable to more complex working conditions.

In this embodiment, as shown in fig. 1, a water cup component 11 may be disposed on the dishwasher body 1, the water cup component 11 includes a cup body 111 and a cavity-dividing component 112, the cup body 111 is mounted at the lower portion of the dishwasher body 1, the cavity-dividing component 112 is located in the cup body 111, one end of the cavity-dividing component 112 is connected to the inner peripheral wall of the cup body 111, and the other end of the cavity-dividing component 112 extends to the lower wall of the cup body 111 to divide the interior of the cup body 111 into a liquid collection cavity 1111 and a liquid level measurement cavity 1112.

In a possible embodiment, as shown in fig. 3, the buffer 3 may further include a partition 5 disposed in the buffer inner cavity 32 and dividing the buffer inner cavity 32 into a first inner cavity 321 and a second inner cavity 322, the partition 5 is provided with a medium flow port 51, wherein the number of the medium flow port 51 may be one or more, the liquid buffer medium 33 is filled in the first inner cavity 321, when the water 4 pushes the gas in the liquid level measurement cavity 1112 to flow to the gas pressure sensor 2 and the flow rate is greater than a preset value, the liquid buffer medium 33 flows from the first inner cavity 321 to the second inner cavity 322 through the medium flow port 51, in a specific application, for example, when the door 8 of the dishwasher is rapidly closed, the water 4 in the liquid collection cavity 1111 pushes the gas in the liquid level measurement cavity 1112 to flow to the gas pressure sensor 2, the gas pushes the liquid buffer medium 33 from the first inner cavity 321 to flow to the second inner cavity 322 through the medium flow port 51, so as to play a role of buffering the pressure of the gas, thereby improving the buffering effect, and in addition, the size of the medium flow rate and the thickness of the partition 5 can be controlled to control the sensitivity of the detection accuracy of the gas pressure sensor 2 and the detection accuracy of the liquid buffer medium 33. It will be appreciated that by the combination of the partition 5 and the liquid buffer medium 33, the gas pressure is prevented from rising rapidly, but not being blocked. The pressure transient rise caused by abnormal factors such as the quick closing door 8 can be filtered, and the accuracy of air pressure measurement is ensured.

Specifically, the separator 5 may be a plate-like structure made of metal or plastic, and the separator 5 may be one or more layers.

In another possible embodiment, the dishwasher may further include a mounting pipe through which the liquid level measuring chamber 1112 is communicated with the buffer 3, the material of the buffering member 31 may be an elastic material, the buffering member 31 may be spherical and slidably disposed in the mounting pipe, and an outer surface of the buffering member 31 is spaced apart from an inner wall of the mounting pipe, thereby also functioning as a pressure of the buffer gas.

In another possible embodiment, the buffer 3 may include an outer tube and a sliding member, one end of the outer tube is communicated with the liquid level measuring cavity 1112, the other end of the outer tube is communicated with the air pressure sensor 2, the outer tube is filled with the liquid buffer medium 33, the sliding member is coaxially disposed with the outer tube and slidably connected with the inner peripheral wall of the outer tube, and the sliding member is in sealing fit with the outer tube, that is, the buffer 3 is equivalent to a syringe filled with the liquid buffer medium 33, in a specific application, for example, when the door 8 of the dishwasher is closed rapidly, the water 4 in the liquid collecting cavity 1111 may push the air in the liquid level measuring cavity 1112 to flow to the air pressure sensor 2, and the sliding member may push the air in the liquid level measuring cavity 1112 to move to squeeze the liquid buffer medium 33 in the outer tube, thereby also playing a role of buffering the air pressure.

Further, the buffer 3 may further include a mounting cavity 34, an air inlet 35, an air outlet 36, a first blocking member 37 and a second blocking member 38, where the air inlet 35 and the air outlet 36 are both communicated with the mounting cavity 34, the air inlet 35 is communicated with the liquid level measurement cavity 1112, and the air outlet 36 is communicated with the air pressure sensor 2; first separation member 37 and second separation member 38 all set up in installation cavity 34 to with the sealed cooperation of the chamber wall of installation cavity 34, and have the interval between first separation member 37 and the second separation member 38 in order to form buffering inner chamber 32, first separation member 37 and second separation member 38's material is elastic material, through above-mentioned structural setting, not only easy to assemble buffer 3, but also convenient production and processing reduces the manufacturing difficulty. In a specific application, for example, when the door 8 of the dishwasher is closed rapidly, the water 4 in the liquid collecting chamber 1111 may push the air in the liquid level measuring chamber 1112 to flow to the buffer 3 through the air inlet 35, the air pushes the first blocking member 37 to deform it, and squeezes the liquid buffer medium 33 in the first inner chamber 321, so that the liquid buffer medium 33 flows to the second inner chamber 322, and after the liquid buffer medium 33 enters the second inner chamber 322, the liquid buffer medium 33 pushes the second blocking member 38 to deform it, so that the pressure of the buffer air increases the accuracy of the detection of the air pressure sensor 2.

Still further, the resilient material may be polytetrafluoroethylene, polyurethane or rubber.

The utility model discloses an in an embodiment, as shown in fig. 1 and fig. 2, the dish washer still can include first connecting pipe 6 and second connecting pipe 7, and air inlet 35 is linked together through first connecting pipe 6 and level measurement chamber 1112, and gas outlet 36 is linked together through second connecting pipe 7 and baroceptor 2, through the setting of above-mentioned structure, not only can further the easy to assemble buffer 3, but also can conveniently produce and process, reduces the manufacturing degree of difficulty. In a specific application, when the buffer 3 and the liquid level measurement cavity 1112 need to be communicated, one end of the first connection pipe 6 may be communicated with the liquid level measurement cavity 1112, and the other end of the first connection pipe 6 is communicated with the air inlet 35 of the buffer 3; similarly, when the buffer 3 and the air pressure sensor 2 need to be communicated, one end of the second connecting pipe 7 may be communicated with the air outlet 36 of the buffer 3, and the other end of the second connecting pipe 7 may be communicated with the air pressure sensor 2.

In an embodiment of the present invention, the dishwasher may further include a gas pressure regulating valve disposed between the buffer 3 and the air pressure sensor 2, and specifically, the gas pressure regulating valve may be disposed on the second connecting pipe 7, so that the sensitivity and accuracy of the detection of the air pressure sensor 2 can be controlled by controlling the valve of the gas pressure regulating valve.

To sum up, the utility model discloses a dish washer, compared with the prior art, the utility model discloses a pressure conduction is blocked completely to when the pulse peak (when the velocity of flow of the gas flow in level measurement chamber 1112 to buffer 3 is greater than the default), also promptly, is difficult for making and is in the state of blocking always between dish washer body 1 and the baroceptor 2, is difficult for making pressure sensor 2 inefficacy.

In some embodiments, the liquid buffer medium 33 may be multiple, and multiple (for example, two) liquid buffer media 33 may be immiscible, wherein the liquid buffer medium 33 (or the first medium) with high density and high viscosity coefficient may sink, and the medium flow opening 51 on the partition 5 (or the partition) is located in the liquid buffer medium 33 with high density and high viscosity coefficient and near the boundary between the two liquid buffer media 33. In a specific application, when the flow rate of the gas in the liquid level measurement cavity 1112 flowing to the buffer 3 is greater than a predetermined value, that is, when the gas pressure is suddenly increased, the liquid buffer medium 33 with high density and high viscosity coefficient in the first inner cavity 321 will be firstly squeezed into the second inner cavity 322. After the pulse spike, if the pressure continues to increase, the flow into the second interior space 322 begins when the level of the liquid buffer medium 33 (or what may be called the second medium) with a low density and low viscosity coefficient drops to the medium flow opening 51. This can achieve the effect of filtering the spike of the pulse while taking into account the sensitivity of the air pressure sensor 2. Further, the parameters of the pulse spike can be adjusted and filtered by adjusting the viscosity, the volume ratio, and the like of the two liquid buffer media 33.

Therefore, the utility model discloses can extensively be used for other adoption gas or water 4 outside the dish washer as medium conduction pressure's pressure switch and pressure sensor for filter transient pressure pulse to the mode filtration pulse of physics, work is more stable.

In the embodiments of the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are intended to be broadly construed, and for example, according to the principles, the terms "connected" and "connected" may be fixedly, detachably, or integrally connected. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" are used for indicating the position or the positional relationship based on the position or the positional relationship shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but not for indicating or implying that the indicated device or unit must have a specific direction, be constructed and operated in a specific position, and thus, should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the terms "one embodiment," "a preferred embodiment," and the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A dishwasher, comprising:

the dishwasher comprises a dishwasher body (1) provided with a liquid collecting cavity (1111) and a liquid level measuring cavity (1112) with the bottom communicated with the liquid collecting cavity (1111);

an air pressure sensor (2) in communication with the liquid level measurement chamber (1112) configured to detect air pressure in the liquid level measurement chamber (1112) to determine the liquid level in the liquid collection chamber (1111);

the buffer (3) comprises a buffer component (31), the buffer component (31) is arranged between the dishwasher body (1) and the air pressure sensor (2), a buffer inner cavity (32) is arranged in the buffer component (31), and a liquid buffer medium (33) is filled in the buffer inner cavity (32);

wherein the buffer (3) is configured to make the liquid buffer medium (33) flow to the air pressure sensor (2) when the flow rate of the gas in the liquid level measurement cavity (1112) to the buffer (3) is larger than a preset value, so as to buffer the pressure of the gas and increase the detection accuracy of the air pressure sensor (2).

2. The dishwasher of claim 1, characterized in that the buffer (3) further comprises a partition (5) disposed in the buffer interior (32) and dividing the buffer interior (32) into a first interior (321) and a second interior (322), the partition (5) being provided with a medium flow opening (51), the liquid buffer medium (33) being filled in the first interior (321), the liquid buffer medium (33) flowing from the first interior (321) into the second interior (322) through the medium flow opening (51) when the flow rate of the gas in the level measurement chamber (1112) to the buffer (3) is greater than a predetermined value.

3. The dishwasher of claim 2, characterized in that the buffer (3) further comprises a mounting chamber (34), an air inlet (35), an air outlet (36), a first barrier (37) and a second barrier (38), the air inlet (35) and the air outlet (36) both communicating with the mounting chamber (34), the air inlet (35) further communicating with the level measurement chamber (1112), the air outlet (36) further communicating with the air pressure sensor (2); the first blocking part (37) and the second blocking part (38) are arranged on the wall of the installation cavity (34) in a sealing mode, the buffer inner cavity (32) is formed between the first blocking part (37) and the second blocking part (38), and the first blocking part (37) and the second blocking part (38) are made of elastic materials.

4. A dishwasher according to claim 3, wherein the resilient material is polytetrafluoroethylene, polyurethane or rubber.

5. The dishwasher of claim 3, further comprising a first connecting pipe (6) and a second connecting pipe (7), the air inlet (35) communicating with the level measuring chamber (1112) through the first connecting pipe (6), the air outlet (36) communicating with the air pressure sensor (2) through the second connecting pipe (7).

6. A dishwasher according to claim 1, characterized in that the liquid buffer medium (33) is hydraulic oil.

7. The dishwasher of claim 6, wherein the hydraulic oil is a synthetic hydraulic oil.

8. The dishwasher according to any one of claims 1 to 7, wherein the dishwasher body (1) is provided with a cup part (11), the cup part (11) comprising a cup body (111) and a chamber dividing part (112), the cup body (111) being mounted at a lower portion of the dishwasher body (1), the chamber dividing part (112) being located within the cup body (111), and one end of the chamber dividing part (112) being connected to an inner circumferential wall of the cup body (111), the other end of the chamber dividing part (112) extending toward a lower wall of the cup body (111) to partition an interior of the cup body (111) into the sump chamber (1111) and the liquid level measuring chamber (1112).

9. The dishwasher of claim 1, characterized in that the volume of the liquid buffer medium (33) is not less than 90% of the volume of the buffer interior (32).

10. The dishwasher according to any one of claims 1 to 7, further comprising a gas pressure regulating valve disposed between the buffer (3) and the gas pressure sensor (2).