A gas sensing module in a cavity of a dishwasher and a dishwasher

Abstract

The utility model relates to a dish washer field provides a cavity gas response module and dish washer of dish washer, it includes air outlet, exhaust device and air casing, and the air outlet of exhaust device is connected with air outlet, and the air casing is equipped with first air duct, second air duct and valve assembly, and the air inlet of first air duct is connected with air outlet, and the air inlet of second air duct is connected with first air duct, and the valve assembly is located at the junction of second air duct and first air duct and closes the air inlet of second air duct, and the humidity sensor is equipped in first air duct, and the peculiar smell sensor is equipped in second air duct, and the valve assembly can open second air duct through the preset value of humidity sensor. Through setting humidity sensor detection exhaust air humidity value, when humidity value reaches the preset value, air only inputs second air duct, detects peculiar smell through peculiar smell sensor, avoids peculiar smell sensor to be affected by humidity, improves the detection accuracy of peculiar smell sensor.

Description

Technical Field

[0001] This utility model relates to the field of dishwashers, and more particularly to an in-cavity gas sensing module for a dishwasher and the dishwasher itself. Background Technology

[0002] As an essential appliance in modern kitchens, dishwashers automatically wash, dry, and sanitize tableware, greatly improving kitchen efficiency. Currently, dishwashers on the market continuously circulate the air inside the cleaning chamber after finishing their cycle. This is primarily to remove residual food residue, odors, and moisture, allowing the tableware to be placed in a clean and dry environment. Some dishwashers determine the circulation time based on odor sensor signals; the dishwasher stops venting when the sensor detects no odor in the exhaust air. However, the humidity in the exhaust air significantly affects the sensitivity of the odor sensor, and currently, there is no good solution to this problem. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned problems. We provide an in-cavity gas sensing module for a dishwasher and a dishwasher. Using this in-cavity gas sensing module can solve the problem of odor sensors being affected by air humidity.

[0004] To achieve the above objectives, this utility model provides an in-cavity gas sensing module for a dishwasher, which includes an air outlet duct, an exhaust device, and a fan housing. The air outlet end of the exhaust device is connected to the air outlet duct. The fan housing contains a first air duct, a second air duct, and a valve assembly. The air inlet end of the first air duct is connected to the air outlet duct, and the air inlet end of the second air duct is connected to the first air duct. The valve assembly is located at the connection between the second air duct and the first air duct and closes the air inlet end of the second air duct. A humidity sensor is provided in the first air duct, and an odor sensor is provided in the second air duct. The valve assembly can open the second air duct through a preset value of the humidity sensor.

[0005] In one or more embodiments, the valve assembly includes a baffle, an elastic element, and a wax motor. The baffle can be rotated to open or close the second air duct. The elastic element abuts against the baffle and is used to keep the baffle closed in the second air duct state. The wax motor is used to drive the baffle to rotate and open the second air duct.

[0006] In one or more embodiments, the air casing is provided with a pivot, and the baffle has a pivot portion connected to the pivot.

[0007] In one or more embodiments, the elastic element is a torsion spring, which is sleeved on a pivot, with a first end of the torsion spring abutting against the wind shell and a second end of the torsion spring abutting against the baffle.

[0008] In one or more embodiments, the air outlet end of the first air duct is connected to the air outlet duct.

[0009] In one or more embodiments, the air outlet duct includes a main air duct and a bypass air duct, the air inlet ends of the main air duct and the bypass air duct are both connected to the air outlet end of the exhaust device, the air outlet end of the bypass air duct is connected to the main air duct, and the air inlet end of the first air duct is connected to the bypass air duct.

[0010] This application also provides a dishwasher having the cavity gas sensing module described above.

[0011] Compared with the prior art, the advantages of this utility model are: when the gas sensing module inside the cavity is working, the second air duct with the odor sensor is in a closed state. The humidity sensor determines the humidity of the discharged air. When the humidity reaches the set value, the valve assembly opens the second air duct. The odor sensor detects whether there is an odor in the discharged air and sends a corresponding signal so that the dishwasher can perform subsequent work. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure in this embodiment where the gas sensing module is installed on the outside of the inner liner; Figure 2 This is a schematic diagram of the structure of the second air duct of the cavity gas sensing module in this embodiment when it is closed; Figure 3 This is a schematic diagram of the structure of the second air duct of the cavity gas sensing module in this embodiment when it is open; Figure 4 for Figure 3 A magnified view of A in the middle. Detailed Implementation

[0013] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0014] See appendix Figure 1-2This application provides an in-cavity gas sensing module for a dishwasher, comprising an air outlet duct, an exhaust device 1, and a fan housing 2. The exhaust device is a blower, and the air outlet of the exhaust device 1 is connected to the air outlet duct. The fan housing 2 contains a first air duct 3, a second air duct 4, and a valve assembly. The air inlet of the first air duct 3 is connected to the air outlet duct, and the air inlet of the second air duct 4 is connected to the first air duct 3. The valve assembly is located at the connection between the second air duct 4 and the first air duct 3 and closes the air inlet of the second air duct 4. A humidity sensor 5 is installed in the first air duct 3, and a humidity sensor 5 is installed in the second air duct 4. The system includes an odor sensor 6. The valve assembly can open the second air duct 4 based on a preset value set by the humidity sensor 5. Specifically, when the exhaust fan 1 draws air into the exhaust duct, some air enters the first air duct 3. The humidity sensor 5 detects the humidity in the air. When the humidity reaches the set value, the valve assembly starts working and opens the second air duct, allowing air to enter. The odor sensor 6 detects the presence of odors in the air and outputs a detection signal. The dishwasher can then perform the remaining tasks based on this signal, such as stopping the exhaust process. This structure prevents high humidity air from affecting the normal operation of the odor sensor 6.

[0015] See appendix Figure 3-4 The valve assembly includes a baffle plate 7, an elastic element, and a wax motor 8. The baffle plate 7 can be rotated to open or close the second air duct 4. The elastic element abuts against the baffle plate 7 and is used to keep the baffle plate 7 in the closed state of the second air duct 4. The wax motor 8 is used to drive the baffle plate 7 to rotate and open the second air duct 4. The second air duct 4 is kept closed by the elastic element. When the humidity in the air reaches a preset value, the wax motor 8 works and drives the baffle plate to rotate, thereby opening the second air duct.

[0016] To ensure smooth rotation of the baffle, the air housing 2 is provided with a pivot 9, and the baffle 7 has a pivot part 71 connected to the pivot 9. The elastic element is a torsion spring, which is sleeved on the pivot 9. The first end 10 of the torsion spring abuts against the air housing 2, and the second end 11 of the torsion spring abuts against the baffle 7.

[0017] The air outlet of the first air duct 3 is connected to the air outlet duct so that the input air can be transported back to the air outlet duct and the air can be discharged in a concentrated manner through the air outlet of the air outlet duct.

[0018] The air outlet includes a main air duct 12 and a bypass air duct 13. The main air duct 12 is mainly used for exhaust. The air inlets of both the main air duct 12 and the bypass air duct 13 are connected to the air outlet of the exhaust device 1. The air outlet of the bypass air duct 13 is connected to the main air duct 12. The air inlet of the first air duct 3 is connected to the bypass air duct 13. The main air duct 12 is mainly used for exhaust. The bypass air duct provides the air required for detection to the first air duct, which can avoid affecting the normal exhaust operation of the dishwasher.

[0019] This application also provides a dishwasher having the cavity gas sensing module described above, which can be disposed on the outer wall of the dishwasher inner tub.

[0020] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A cavity gas sensing module for a dishwasher, characterized in that: It includes an air outlet duct, an exhaust device (1) and a fan housing (2). The air outlet of the exhaust device (1) is connected to the air outlet duct. The fan housing (2) is provided with a first air duct (3), a second air duct (4) and a valve assembly. The air inlet of the first air duct (3) is connected to the air outlet duct. The air inlet of the second air duct (4) is connected to the first air duct (3). The valve assembly is located at the connection between the second air duct (4) and the first air duct (3) and closes the air inlet of the second air duct (4). The first air duct (3) is provided with a humidity sensor (5). The second air duct (4) is provided with an odor sensor (6). The valve assembly can open the second air duct (4) through the preset value of the humidity sensor (5).

2. The cavity gas sensing module of a dishwasher according to claim 1, characterized in that: The valve assembly includes a baffle (7), an elastic element and a wax motor (8). The baffle (7) can be rotated to open or close the second air duct (4). The elastic element abuts against the baffle (7) and is used to keep the baffle (7) in the state of closing the second air duct (4). The wax motor (8) is used to drive the baffle (7) to rotate and open the second air duct (4).

3. The cavity gas sensing module of a dishwasher according to claim 2, characterized in that: The wind shell (2) is provided with a pivot (9), and the baffle (7) has a pivot part (71) connected to the pivot (9).

4. The cavity gas sensing module of a dishwasher according to claim 3, characterized in that: The elastic element is a torsion spring, which is sleeved on the pivot (9). The first end (10) of the torsion spring abuts against the wind shell (2), and the second end (11) of the torsion spring abuts against the baffle (7).

5. The cavity gas sensing module of a dishwasher according to claim 1, characterized in that: The air outlet of the first air duct (3) is connected to the air outlet duct.

6. The cavity gas sensing module of a dishwasher according to any one of claims 1-5, characterized in that: The air outlet includes a main air outlet (12) and a side air outlet (13). The air inlet of the main air outlet (12) and the side air outlet (13) are connected to the air outlet of the exhaust device (1). The air outlet of the side air outlet (13) is connected to the main air outlet (12). The air inlet of the first air outlet (3) is connected to the side air outlet (13).

7. A dishwasher, characterized in that: The dishwasher has an in-cavity gas sensing module as described in any one of claims 1-6.

Images