Moisture regain prevention control method and dish washing machine

Abstract

The invention discloses an anti-moisture regain control method of a dish-washing machine, a door body of the dish-washing machine is closed after drying is finished, residual moisture in a water tank is evaporated into water vapor by utilizing residual heat in an inner container, the inner container comprises a humidity detection device, a humidity value in the inner container can be detected in real time, and when the detected humidity value reaches a preset humidity threshold value, the humidity in the inner container can be detected in real time. Controlling the dish-washing machine to repeatedly open and close a door body, and in the process of opening and closing the door body of the dish-washing machine, according to the temperature difference and the humidity value of the inner container wall and the inner container air, adjusting the humidity threshold value of opening and closing of the door body in real time until the humidity in the inner container is continuously lower than the preset humidity value within a period of time; at the moment, the inner container wall of the dish-washing machine and tableware in the inner container cannot get damp any more.

Description

Technical Field

[0001] The present invention belongs to the technical field of dishwashers, and in particular relates to a moisture-return prevention control method and a dishwasher. Background Art

[0002] Dishwashers currently on the market all have a drying stage in their programs after washing. There are various drying methods, including hot air drying, automatic door drying, etc. Regardless of the drying method, after drying the moisture on the surface of the dishes, they will face a problem, that is, after the drying is completed and the door is closed for a certain period of time, moisture will condense into water droplets on the wall of the inner tank, which is called moisture regeneration. The moisture regeneration phenomenon is that after the dishwasher door is closed, the internal space is closed, and the residual moisture in the sink is evaporated into water vapor by the residual heat of the inner tank over time, which increases the humidity of the inner tank. At the same time, the temperature of the inner tank wall drops faster than the air in the tank. The saturated absolute humidity is small where the temperature is low, and the gas in the tank with high humidity will reach the saturated humidity of the air on the surface of the inner tank when it encounters the inner tank with low temperature, and begin to precipitate water vapor, resulting in moisture regeneration.

[0003] In the prior art, dishwashers often use exhaust assemblies to prevent moisture from returning. For example, patent application CN201610305093.8 discloses a dishwasher and a control method for the dishwasher. The dishwasher includes an inner container, a door assembly, an air inlet, an exhaust device, and a controller. The inner container has an air inlet. The door assembly is rotatably connected to the inner container and defines an air outlet communicating with the air inlet. The air inlet is mounted on the air inlet. The exhaust device is mounted on the air outlet. A controller connects the air inlet and the exhaust device. The dishwasher has a preset storage cycle, and the controller is configured to control the activation of one or both of the air inlet and exhaust devices during each storage cycle. In the dishwasher of the present invention, the controller can control the activation of one or both of the air inlet and exhaust devices during each storage cycle. However, the dishwasher control method of this invention requires the installation of an exhaust device on the door, and activating the exhaust device also increases the dishwasher's energy consumption.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The present invention aims to provide a method for preventing moisture reentry. After drying, the dishwasher closes the door and monitors the humidity in the inner container in real time. When the humidity reaches a preset first humidity threshold, the door is controlled to open. When the humidity drops to a preset second humidity threshold after the door is opened, the door is controlled to close. After closing, humidity monitoring in the inner container continues. This method utilizes the residual heat of the dishwasher after drying to evaporate any remaining moisture, and the moisture is expelled by controlling the door's opening and closing. This method ensures that moisture reentry does not occur in the inner container or on the surface of the dishes after drying, while also minimizing energy consumption.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] S1. The dishwasher closes the door after drying is completed;

[0008] S2, real-time detection of the humidity value in the inner tank, when the humidity value reaches a preset first humidity threshold, the door is controlled to open;

[0009] S3, continue to detect the humidity value in the inner tank, and when the humidity value drops to a preset second humidity threshold, control the door to close and return to step S2;

[0010] The residual heat in the inner tank of the dishwasher after drying is used to evaporate the remaining water vapor in the remaining tank. The humidity value in the inner tank is then detected and the dishwasher door is controlled to open and close, thereby discharging the evaporated water vapor in the inner tank and ensuring that moisture will not return to the inner tank, thereby further improving the hygiene effect of the dishwasher and ensuring the health of users.

[0011] Optionally, in step S2, the first humidity threshold is 80%;

[0012] In step S3, the second humidity threshold is related to the humidity value of the external environment.

[0013] Optionally, the humidity value in the inner tank and the temperature value of the inner tank wall and the air in the inner tank are detected at the same time. According to the humidity difference between the inner tank wall and the air in the inner tank, the first humidity threshold is matched. By combining the temperature difference between the inner tank wall and the air in the dishwasher and the humidity value in the inner tank, the first humidity threshold when the dishwasher door is opened can be adjusted more accurately to improve the anti-moisture efficiency.

[0014] Optionally, in step S3, the external environmental humidity is detected and the external environmental humidity is defined as a second humidity threshold.

[0015] Optionally, in step S3, the dishwasher adjusts the second humidity threshold in real time according to the number of times the door is opened and closed. The more times the door is opened and closed, the less residual temperature in the tank and the lower the humidity. The second humidity threshold preset by the dishwasher is adjusted in real time to further improve the anti-moisture efficiency.

[0016] In step S2, the humidity value is detected and timing is performed. Before the timing reaches the preset time, the humidity value in the inner tank is less than the preset first humidity threshold, and the detection is terminated. When the humidity value in the inner tank is always lower than the first humidity threshold within the set time, there will be no more moisture in the tank.

[0017] Optional, the default duration is 10 minutes.

[0018] Another object of the present invention is to provide a dishwasher, applying the above-mentioned anti-moisture control method:

[0019] Optionally, the dishwasher has a control unit, a door body that can be opened and closed, and an automatic door opening and closing system for controlling the opening and closing degree of the door body; the automatic door opening and closing system is communicatively connected to the control unit.

[0020] Optionally, the dishwasher also has a humidity detection device, which is communicatively connected to the control unit and is used to continuously detect the humidity of the inner tank.

[0021] Optionally, the dishwasher further includes a temperature detection device, which is communicatively connected to the control unit and is used to obtain the temperature of the inner wall of the dishwasher and the air inside the inner tank, and send the temperature to the control unit.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. The present invention uses the residual heat after the inner tank drying stage to evaporate the residual water remaining at the bottom of the water tank into water vapor, and detects the humidity value in the dishwasher inner tank in real time. By controlling the automatic opening and closing of the door, the humidity value in the inner tank is effectively reduced until the humidity value in the inner tank is below a preset threshold, ensuring that moisture will no longer occur in the dishwasher inner tank.

[0024] 2. In the present invention, the humidity detection device adjusts the first humidity threshold when the dishwasher door is opened and closed in combination with the temperature difference between the inner tank wall and the air inside the tank. By combining the temperature difference between the inner tank wall and the air inside the tank and the humidity value in the inner tank, the first humidity threshold when the dishwasher door is opened and closed can be more accurately adjusted and controlled, thereby improving the anti-moisture efficiency of the present invention and further enhancing the user experience.

[0025] 3. In the present invention, the dishwasher will adjust the preset second humidity threshold in real time according to the number of times the door is opened and closed. The more times the door is opened and closed, the lower the second humidity threshold will be, thereby improving the anti-moisture return efficiency of the anti-moisture return control method in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a flow chart of the anti-moisture return control method described in Example 1 of the present invention;

[0027] Figure 2 This is a flow chart of the anti-moisture return control method described in Example 2 of the present invention. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that the following embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0031] Most dishwasher drying devices in the prior art use an exhaust component to prevent moisture from returning to the inner tank of the dishwasher after drying. The exhaust component not only increases the internal structure of the dishwasher, but also increases the energy consumption of the dishwasher, affecting the user experience.

[0032] The present invention provides a method for controlling the anti-moisture of a dishwasher, the control logic of which is as follows: Figure 1 As shown, the following steps are included:

[0033] S1. The dishwasher closes the door after drying is completed;

[0034] S2. Real-time detection of the humidity value in the inner tank. If the humidity value reaches a preset first humidity threshold, the door is controlled to open;

[0035] S3. Continue to detect the humidity value in the inner tank. When the humidity value drops to a preset second humidity threshold, control the door to close and return to step S2.

[0036] The anti-moisture return control method of the present invention is to close the dishwasher door after the drying stage is completed, and detect the humidity value in the dishwasher inner tank in real time. When the humidity value reaches a preset first humidity threshold, the door is controlled to open. After the door is opened, the door is controlled to close after the humidity value drops to a preset second humidity threshold. The dishwasher door is repeatedly opened and closed until the humidity value in the inner tank is always lower than the first humidity threshold. At this time, it is determined that no moisture return will occur in the inner tank, the humidity value in the dishwasher inner tank is stopped, and the automatic door opening and closing program is ended. This solution does not require an additional ventilation fan, improves the sealing of the interior of the dishwasher, and can effectively prevent the occurrence of moisture return.

[0037] The present invention is described in detail below with reference to specific embodiments.

[0038] Example 1

[0039] As an embodiment of the present invention, this embodiment discloses an anti-moisture return control method applied to a dishwasher. After the dishwasher finishes drying, the door is closed, and a humidity detection device located in the inner tank of the dishwasher detects the humidity value of the inner tank in real time. When it is detected that the humidity value of the inner tank is greater than a set first humidity threshold, the humidity sensor transmits a signal to the control unit, and the control unit opens the door, connecting the inner tank of the dishwasher with the external environment to balance the humidity value of the inner tank; when the humidity detection device detects that the humidity of the inner tank reaches a set second humidity threshold, the dishwasher transmits a door closing signal to the control unit, and the control unit closes the door.

[0040] Furthermore, after the door is closed, the humidity sensor continues to detect the humidity of the dishwasher's inner tank. When it detects that the humidity value of the inner tank is greater than the set humidity threshold within a preset time period, the humidity sensor transmits a signal to the control unit, and the control unit opens the door again to balance the air pressure inside the dishwasher and the outside world. When the humidity detection device detects that the humidity of the inner tank reaches the set value, the control unit closes the door.

[0041] In this embodiment, the dishwasher uses the residual heat inside the dishwasher after drying to evaporate the water remaining at the bottom of the sink into water vapor. As the water evaporates, the humidity in the dishwasher gradually rises. After the humidity inside the dishwasher reaches a first humidity threshold, the dishwasher door opens. Due to the humidity difference between the inside of the dishwasher and the outside world, the humidity drops rapidly after the dishwasher tank is connected to the outside world. After a short period of time, the humidity inside the dishwasher tank drops to a preset second humidity threshold, and the dishwasher door closes. The above operation is then repeated. Compared with the prior art, the anti-return moisture control method in this embodiment utilizes the residual heat of the dishwasher tank after drying to evaporate the residual moisture inside the dishwasher, and controls the opening and closing of the door by detecting humidity to discharge the moisture. Without the need for any additional devices, it achieves the goal of anti-return moisture while saving energy.

[0042] Example 2

[0043] As an embodiment of the present invention, this embodiment further improves the anti-moisture return control method of the dishwasher based on the first embodiment, as follows:

[0044] like Figure 2 As shown, in step S2, timing starts when the humidity value is detected. After the humidity value in the dishwasher tank is always less than the preset first humidity threshold within the set time, the detection is terminated. At this time, moisture will no longer occur in the dishwasher tank. The set time can be adjusted according to the user's actual usage needs. Here, 10 minutes is taken as an example for detailed explanation.

[0045] The system begins detecting humidity and timing. If the humidity reaches a first threshold during the timing process, the dishwasher opens the door. When the humidity in the dishwasher's inner tank drops to a second threshold, the door closes and continues to monitor the humidity. Conversely, if the humidity still hasn't reached the first threshold after 10 minutes, the humidity detection device stops detecting the humidity in the tank, the automatic door opening and closing process ends, and the anti-moisture resorption control method is complete. This solution can determine whether moisture resorption will occur based on humidity changes over a certain period of time, and stops detecting if it determines moisture resorption will not occur. This prevents moisture resorption in the dishwasher's inner tank while significantly saving energy, improving the dishwasher's intelligence, and enhancing the user experience.

[0046] Furthermore, the first humidity threshold in the above process can be a preset fixed value, or it can be set and modified according to the user's actual usage needs and expectations. In this embodiment, the first humidity threshold is 80%; that is, if the detected humidity value is greater than 80%, it is judged that moisture resorption will still occur. If the humidity value does not reach or exceed 80% within the set time, it is considered that moisture resorption will no longer occur.

[0047] Furthermore, in this embodiment, the second humidity threshold is related to the humidity value of the external environment, and the dishwasher adjusts the second humidity threshold in real time according to the number of times the door is opened and closed.

[0048] The dishwasher prevents moisture from returning to the inner tank through the control method of this embodiment without adding any additional components, thereby reducing the cost and energy consumption of the dishwasher and improving the user experience.

[0049] Example 3

[0050] As an embodiment of the present invention, this embodiment is further improved on the basis of the second embodiment as follows:

[0051] Another reason why the surface of tableware and the inner wall of the dishwasher may become damp is that after the drying stage is completed, the temperature drop rate of the tableware surface and the inner wall is inconsistent with the temperature drop rate of the air inside the inner wall. The saturated absolute humidity is small in places with low temperatures. At this time, the residual moisture inside the sink is evaporated into water vapor by the residual temperature of the inner wall. At this time, the high-temperature gas in the tank encounters the relatively low temperature inner wall and tableware surface, which will precipitate water vapor on the inner wall and the surface of the tableware, resulting in dampness.

[0052] In this embodiment, the dishwasher inner tank also includes a temperature detection device, which is synchronously turned on when the inner tank starts to detect humidity. After the dishwasher completes the drying stage, the temperature difference between the inner tank wall and the air in the tank can be detected in real time. According to the humidity difference between the inner tank wall and the air in the tank, the first humidity threshold is matched. By combining the temperature difference and the humidity value, the first humidity threshold when the dishwasher door is opened can be adjusted more accurately, thereby improving the anti-moisture efficiency of the present invention and further enhancing the user experience.

[0053] Example 4

[0054] As an embodiment of the present invention, this embodiment is further improved on the basis of the second embodiment as follows:

[0055] To improve the dishwasher's ability to dry out residual moisture, the door is closed near the end of the drying phase. This allows the surface of the dishes and inner tank to dry completely. The remaining heat from the drying phase quickly and efficiently evaporates the moisture at the bottom of the sink into vapor. Once the humidity detection device detects that the tank humidity has reached the target threshold, it controls the door to open and drain the vapor from the tank.

[0056] In this embodiment, when the drying stage of the dishwasher is about to end, the dishwasher door is closed, and the enclosed space is used to evaporate the residual moisture in the dishwasher tank more quickly and efficiently, further improving the efficiency of the anti-moisture control method, thereby ensuring that after the water vapor is discharged for the first time, the dishwasher tank still has residual temperature to continue evaporating the remaining water vapor.

[0057] Example 5

[0058] As an embodiment of the present invention, the difference from the second embodiment is that the first humidity threshold and the second humidity threshold are obtained in different ways, as follows:

[0059] In this embodiment, after the dishwasher is closed for the first time after the drying stage, when the humidity detection device detects that the humidity value exceeds 85%, it transmits the automatic door opening information to the control unit, and the control unit controls the door to open. At this time, the humidity inside the dishwasher is much higher than the humidity of the external environment. After the dishwasher door is opened, the internal water vapor will be quickly discharged due to the pressure difference between the inside and outside.

[0060] Furthermore, when the humidity detection device detects that the humidity value in the inner tank drops to 65%, it transmits the automatic door closing information to the control unit, and the control unit controls the door to close. At this time, the inner tank of the dishwasher still has residual temperature to continue evaporating the residual moisture inside the tank.

[0061] Furthermore, in this embodiment, after closing the door, when the humidity detection device detects that the humidity value in the inner tank exceeds 85%, the automatic door opening information is transmitted to the control unit, and the control unit controls the door to open. The humidity of the external environment is lower than the humidity of the dishwasher inner tank, and the humidity difference is smaller than when the drying stage is about to end. At this time, the humidity threshold for automatic closing of the inner tank is increased. When the humidity value in the inner tank drops to 70%, the automatic door closing information is transmitted to the control unit, and the control unit controls the door to close. By dynamically adjusting the set threshold for opening and closing the dishwasher door, the residual temperature after the dishwasher is dried and the humidity difference between the inner tank of the dishwasher and the outside world are fully utilized to quickly and efficiently evaporate the moisture remaining at the bottom of the sink.

[0062] Furthermore, after closing the door, when the humidity detection device detects that the humidity value in the inner tank exceeds 80%, it transmits the automatic door opening information to the control unit, and the control unit controls the door to open. The humidity value of the external environment is lower than the humidity of the inner tank of the dishwasher. After the humidity value in the inner tank drops to 75%, the automatic door closing information is transmitted to the control unit, and the control unit controls the door to close.

[0063] Furthermore, after the dishwasher door is closed, when the humidity detection device detects that the temperature in the dishwasher tank is always maintained below 80% within a certain period of time, moisture will no longer occur inside the dishwasher, and the dishwasher will stop the automatic door opening and closing program.

[0064] Furthermore, in this embodiment, when the humidity detection device detects that the temperature in the dishwasher inner tank is maintained below 80% within ten minutes, moisture will no longer occur inside the dishwasher.

[0065] Example 6

[0066] As an embodiment of the present invention, this embodiment provides a dishwasher using the anti-moisture return control method described in the first embodiment, as follows:

[0067] The present invention also provides a dishwasher using the above-mentioned anti-moisture return control method, which is specifically as follows:

[0068] The dishwasher comprises a control unit, a door body which can be opened and closed, and an automatic door opening and closing system for controlling the opening and closing degree of the door body.

[0069] In this embodiment, the door shaft of the dishwasher is set at the lower part of the door body, and the automatic door opening and closing system can control the dishwasher to open the door from the top of the door body, thereby maximizing the escape rate of high-temperature and high-humidity gas in the inner tank after the dishwasher door is opened, thereby improving the efficiency of reducing the humidity in the inner tank of the dishwasher.

[0070] After the dishwasher's drying stage is over, the dishwasher's inner tank uses residual heat to evaporate the remaining moisture in the tank into water vapor. When the gas inside the dishwasher is in a high temperature and high humidity state, the high temperature and high humidity gas will preferentially be at the top of the inner tank. After the dishwasher door is opened, the high temperature and high humidity gas will also preferentially overflow from above the dishwasher door.

[0071] Furthermore, the dishwasher also has a humidity detection device, which is communicatively connected to the control unit and is used to continuously detect the humidity of the inner tank and send the detected humidity value to the control unit. The control unit determines whether the door of the dishwasher is open or closed based on the humidity value.

[0072] Furthermore, the dishwasher also has a temperature detection device, which is communicatively connected to the control unit and is used to obtain the temperature of the inner wall of the dishwasher and the air inside the inner tank, and send it to the control unit. The control unit adjusts the first humidity threshold based on the temperature difference between the inner wall of the dishwasher and the air inside the inner tank, combined with the humidity value in the inner tank.

[0073] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above-mentioned embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A moisture-proof control method, characterized in that: S1. The dishwasher closes the door after drying is completed; S2, real-time detection of the humidity value in the inner tank, when the humidity value reaches a preset first humidity threshold, the door is controlled to open; S3, continue to detect the humidity value in the inner tank, and when the humidity value drops to a preset second humidity threshold, control the door to close and return to step S2.

2. A moisture-proof control method according to claim 1, characterized in that: In step S2, the first humidity threshold is 80%.

3. The anti-moisture control method according to claim 1, characterized in that: In step S2, the humidity value in the inner tank and the temperature values ​​of the inner tank wall and the air in the inner tank are detected simultaneously, and the first humidity threshold is matched according to the humidity difference between the inner tank wall and the air in the inner tank.

4. The anti-moisture control method according to claim 1, characterized in that: In step S3, the external environment humidity is detected and the external environment humidity is defined as a second humidity threshold.

5. The anti-moisture control method according to claim 1, characterized in that: In step S3, the dishwasher adjusts the second humidity threshold in real time according to the number of times the door is opened after drying is completed.

6. The anti-moisture control method according to any one of claims 1 to 5, characterized in that: In step S2, timing is performed while detecting the humidity value. Before the timing reaches a preset time, the humidity value in the inner tank is less than a preset first humidity threshold, and the detection is terminated.

7. The anti-moisture control method according to claim 6, characterized in that: The default duration is 10 minutes.

8. A dishwasher using the anti-moisture return control method according to any one of claims 1 to 7, characterized in that: It includes a control unit, a door body that can be opened and closed, and an automatic door opening and closing system for controlling the opening and closing degree of the door body; The control unit is connected to the automatic door opening and closing system for controlling the opening and closing of the door body.

9. A dishwasher according to claim 8, characterized in that: It also has a humidity detection device which is communicatively connected with the control unit and is used for continuously detecting the humidity of the inner tank.

10. A dishwasher according to claim 9, characterized in that: It also has a temperature detection device, which is connected to the control unit for obtaining the temperature of the inner wall of the dishwasher and the air inside the inner tank.

Images