WO2020192069A1

WO2020192069A1 - Drying process and drying device for dish-washing machine, and dish-washing machine

Info

Publication number: WO2020192069A1
Application number: PCT/CN2019/109307
Authority: WO
Inventors: 赵海民; 朱剑锋; 潘海锋; 郭名威
Original assignee: 珠海格力电器股份有限公司
Priority date: 2019-03-22
Filing date: 2019-09-30
Publication date: 2020-10-01
Also published as: CN109864682A

Abstract

A drying process and a drying device for a dish-washing machine, and the dish-washing machine. The drying process for the dish-washing machine comprises the following steps: (1) condensing wet air in the dish-washing machine, and collecting condensed water; (2) measuring a liquid level height H1 of the obtained condensed water; (3) measuring a liquid level height H2 of the obtained condensed water after a preset time period S1; (4) comparing a difference value of H2-H1 and a preset height X1: if the difference value is greater than X1, returning to step (2); if the difference value is not greater than X1, stopping condensing, and finishing the drying process. The preset height X1 is a height at which the condensed water is collected in the preset time period S1. The operating degree of the drying process can be regulated by controlling the preset height and the preset time period; the dish-washing machine can be set for different drying articles, so as to ensure that articles that are difficult to be dried can be dried thoroughly.

Description

Drying process of dishwasher, drying device and dishwasher

Related application

This application claims the priority of the Chinese patent application filed on March 22, 2019, with application number 201910222321.9, titled "Drying Process, Drying Device and Dishwasher for Dishwasher", which is hereby incorporated by reference in its entirety .

Technical field

The application belongs to the technical field of dishwashers, and specifically relates to a drying process, a drying device and a dishwasher of a heat pump dishwasher.

Background technique

Dishwasher is a device for washing and drying dishes. The drying process is the process of removing residual water on the dishes that have been cleaned. Specifically, the water is evaporated by increasing the temperature of the water remaining on the dishes. The evaporated water is condensed and discharged through the cooling channel, and the air heated by the condenser is returned to the dishes for repeated use. This type of drying process has set a fixed program, that is, the drying process and time are specific and cannot be controlled, so there will be a problem of poor drying effect for difficult-to-dry tableware.

Summary of the invention

Therefore, the technical problem to be solved by the present application is to provide a drying process, a drying device and a dishwasher of a heat pump dishwasher, which can freely control the drying process and time, and facilitate the drying of hard-to-dry tableware.

In order to solve the above problems, the present application provides a drying process of a dishwasher, which includes the following steps:

(1). Condensate the humid air in the dishwasher and collect the condensed water;

⑵. The height of the condensate water level measured H1;

⑶. The liquid level height H2 of the condensate water measured by the preset time S1;

⑷. Compare the difference of H2-H1 with the preset height X1:

If the difference is greater than X1, return to step (2);

If the difference is not greater than X1, stop condensation and the drying process is complete;

Wherein, the preset height X1 is the height where the condensed water converges at the preset time S1.

In an embodiment, the preset time S1 and the preset height X1 are individually adjustable.

In one embodiment, the humid air is condensed and sent back to the dishwasher or heated and sent back to the dishwasher.

A drying device for a dishwasher includes a circulating air duct, an evaporator, a water reservoir and a liquid level measuring instrument. The inlet and outlet ends of the circulating air duct are both connected to the dishwasher, and the evaporator is provided In the circulating air duct, the water accumulator is arranged below the evaporator to collect condensed water condensed on the evaporator; the liquid level measuring instrument is used to measure the liquid level of the water accumulator.

In an embodiment, it further includes a throttle valve, a compressor and a condenser, which are connected with the evaporator to form a heat pump system.

In an embodiment, the condenser is arranged in the circulating air duct, close to the outlet end, and the evaporator is close to the inlet end.

In an embodiment, a fan is provided at the inlet end or the outlet end.

In one embodiment, the water storage device includes a water receiving tank and a water storage tank, the water receiving tank is connected below the evaporator, and communicates with the water storage tank through a flow guide tube, and the liquid level measuring instrument is arranged at On the water storage tank.

In an embodiment, the liquid level measuring instrument includes a water level sensor, and the water level sensor is fixed on the bottom or side of the water storage tank.

A dishwasher includes the above-mentioned drying device of the dishwasher.

In an embodiment, it further includes a drain pump, which is connected to the water reservoir.

The drying method of the dishwasher provided in this application condenses the humid air in the dishwasher and measures the height of the collected condensate water level. The height of the condensate water level is measured after a preset time. The height difference between the two levels is different from the preset level. Height comparison is used to determine whether to continue condensation or drying is complete; by controlling the preset height and preset time, the operation degree of the drying process can be adjusted, which can be set for different drying items to ensure the thorough drying of difficult-to-dry items.

Description of the drawings

FIG. 1 is a schematic flow chart of a drying process of a dishwasher according to an embodiment of the application;

Figure 2 is a structural diagram of a dishwasher according to an embodiment of the application;

Fig. 3 is a schematic diagram of air flow in a dishwasher according to an embodiment of the application.

The reference signs are indicated as:

1. Upper spray arm; 2. Dishwasher liner; 3. Lower spray arm; 4. Wash pump; 5. Heater; 6. Controller; 7. Drain pipe; 8. Drain pump; 9. Drain Pump; 10. Water level sensor; 11. Water storage tank; 12. Compressor; 13. Fan; 14. Condenser; 15. Diversion tube; 16. Throttle valve; 17. Water tank; 18. Evaporator; 19. Circulating air duct.

detailed description

In order to facilitate the understanding of the application, the application will be described in a more comprehensive manner with reference to the relevant drawings. The drawings show preferred embodiments of the application. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of this application more thorough and comprehensive.

Referring to Fig. 1, according to an embodiment of the present application, the drying process of a dishwasher includes the following steps:

⑴. Condensate the humid air in the dishwasher and collect the condensed water;

⑵. The height of the condensate water level measured H1;

⑷. Compare the difference of H2-H1 with the preset height X1:

If the difference is greater than X1, return to step (2);

This application condenses the humid air inside the dishwasher, so that the water vapor in the humid air is condensed into liquid water, and the condensed water is collected, and the condensed humid air can be discharged from the dishwasher or directly sent back to the dishwasher, or After heating, it returns to the inside of the dishwasher; continuously condenses and collects the moisture in the wet air of the dishwasher, so that the air in the dishwasher and the items to be dried are dried.

During the condensate collection process, measure the height of the condensate level, and compare the level of the condensate collected at the preset time with the preset height to confirm whether it is necessary to continue condensing and measure before and after the preset time. The change value of the condensate level, or stop directly; the preset height corresponds to the degree of drying to be achieved, the higher the degree of drying, the greater the preset height.

Based on the setting of the preset time and preset height, the drying speed and degree of drying in the dishwasher are adjusted. Therefore, for different items to be dried in the dishwasher, different preset times and preset heights can be selected. For the same item to be dried, the preset height and preset time can be adjusted separately, for example, different drying times are required to achieve the same degree of drying, or the same drying time can reach different degrees of drying.

2 and 3, an embodiment of the present application provides a drying device for a dishwasher, including a circulating air duct 19, an evaporator 18, a water reservoir, a liquid level measuring instrument, and a controller 6. The circulating air duct 19 The inlet and outlet ends of the evaporator are both connected to the dishwasher, the evaporator 18 is arranged in the circulating air duct 19, and the water reservoir is arranged below the evaporator 18 to collect and condense in the evaporator 18; the liquid level measuring instrument is used to measure the liquid level of the water reservoir, and the controller 6 is connected with the liquid level measuring instrument.

An evaporator 18 is installed in the circulating air duct 19 to sequentially condense the air passing through the circulating air duct 19. The evaporator 18 absorbs moisture in the air, so that the humidity of the air is reduced to dry air, which is discharged from the dishwasher, or sent back to In the dishwasher liner 2, it is mixed with the moist air in the dishwasher liner 2, and then enters the circulating air duct 19 again, and undergoes a circulation process from wet air to dry air, achieving the purpose of drying the dishwasher liner 2 .

In the above process of continuously condensing the humid air, the condensed water left by the condensation of the evaporator 18 is collected and collected in the water reservoir, and the liquid level of the water reservoir is measured by the liquid level measuring instrument; After setting the time, measure the liquid level in the reservoir again, and transmit the two different liquid level values to the control device 6, and compare the change value of the liquid level with the preset height value to determine whether to continue the air circulation : When the liquid level change value is greater than the preset height value, continue the air circulation; otherwise, stop the air circulation.

For this drying device, it also includes a throttle valve 16, a compressor 12, and a condenser 14, which are connected to the evaporator 18 to form a heat pump system, that is, the throttle valve 16, evaporator 18, compressor 12 and condenser 14 circulate in sequence Connected, the refrigerant circulates in sequence in the above four parts.

Among them, the condenser 14 is arranged in the circulating air duct 19 to heat the dehumidified air to increase the air temperature, and then return it to the inner container 2 of the dishwasher. The throttle valve 16 and the compressor 12 can be arranged outside the circulating air duct 19.

To facilitate the drying process, in this drying device, the evaporator 18 is located at the inlet end of the circulating air duct 19 and the condenser 14 is located at the outlet end of the circulating air duct 19.

In order to accelerate the air circulation speed, a fan 13 is provided at the inlet end or the outlet end.

In one embodiment, the water reservoir includes a water receiving tank 17 and a water storage tank 11. The water receiving tank 17 is connected below the evaporator 18, and communicates with the water storage tank 11 through a draft tube 15. The liquid level measuring instrument is arranged on the water storage tank 11. The water receiving tank 17 collects the water condensed by the evaporator 18, and is introduced into the water storage tank 11 through the diversion pipe 15. The water storage tank 11 is arranged outside the circulating air duct 19 to facilitate the addition of a liquid level measuring instrument.

The liquid level measuring instrument includes a water level sensor 10 which is fixed at the bottom of the water storage tank 11 and senses the height of the liquid level in the water storage tank 11 through weight changes.

The embodiment of the present application also provides a dishwasher, including the above-mentioned drying device, wherein the circulating air duct 19 is vertically arranged, the upper end of the inlet is communicated with the upper part of the dishwasher liner 2, and the lower end of the outlet is connected with the dishwasher liner 2 The lower part is connected, and a fan 13 is provided at the outlet end of the circulating air duct 19.

An upper spray arm 1 and a lower spray arm 3 are provided in the dishwasher liner 2 to spray and clean the dishes placed in the dishwasher liner 2 with spray water (provided by other water sources, as shown in the figure). (The water inlet pipe is not drawn). After being pressurized by the washing pump 4 and heated by the heater 5, it is sent to the inner tank 2 of the dishwasher. The water after spraying and washing can be recycled or discharged from the drain pipe 7 through the drain pump 8. .

When the spray washing of the dishwasher is finished, the hot and humid air and moisture in the inner liner 2 of the dishwasher are high. At this time, the dishwasher enters the drying stage, and the fan 13 starts to rotate, and the air in the circulating air duct 19 is sent into the dishwasher The air is conveyed in the tank 2, and negative air pressure is formed in the circulating air duct 19, and the hot and humid air in the dishwasher liner 2 is sucked into the circulating air duct 19. At the same time, the heat pump unit starts to work. The evaporator 18 produces cold energy and passes through the evaporator 18. The hot and humid air rapidly condenses, and the air condensed by the evaporator 18 becomes dry and cold air. It is heated by the condenser and sent back to the dishwasher liner 2 to evaporate the moisture in the liner 2 again and then suck it into the circulating air duct. , This cycle achieves the drying effect.

The hot and humid air passing through the evaporator 18 quickly condenses, and the generated condensate flows into the water receiving tank 17 according to gravity, and flows into the water storage tank 11 through the diversion pipe 15 at the bottom of the water receiving tank 17, and the condensed water in the water storage tank 11 passes through the drain pump 9 Drain the dishwasher through the drain pipe 7.

There is a water level sensor 10 at the bottom or side of the water storage tank 11, which is used to detect the amount of water stored in the water storage tank 11 during the drying phase. When the drying process starts, the water level sensor 10 detects the water level value H1 of the water storage tank 11, and the controller 6 records this value. The heat pump components and fans are turned on for the preset time S1. After the running time S1, the water level sensor 10 detects the water level in the water storage tank 11 at that moment and records it as H2, and judges H2-H1>the preset value X1? If yes, return to "detect water level value H1", if no, then the program ends. Through this method, the degree of dryness inside the dishwasher can be detected indirectly, so as to change the running time and achieve the problem of good drying effect and energy saving.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express a few implementation modes of the present application, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims

A drying process of a dishwasher is characterized in that it comprises the following steps:

⑴. Condensate the humid air in the dishwasher and collect the condensed water;

⑵. The height of the condensate water level measured H1;

⑶. The liquid level height H2 of the condensate water measured by the preset time S1;

⑷. Compare the difference of H2-H1 with the preset height X1:

If the difference is greater than X1, return to step (2);

If the difference is not greater than X1, stop condensation and the drying process is complete;

Wherein, the preset height X1 is the height where the condensed water converges at the preset time S1.
The drying process of the dishwasher according to claim 1, wherein the preset time S1 and the preset height X1 are individually adjustable.
The drying process of the dishwasher according to claim 1, wherein the humid air is condensed and then sent back to the dishwasher or heated and sent back to the dishwasher.
A drying device for a dishwasher, which is characterized by comprising a circulating air duct (19), an evaporator (18), a water reservoir and a liquid level measuring instrument, and the inlet end and the outlet end of the circulating air duct (19) Are connected to the dishwasher, the evaporator (18) is arranged in the circulating air duct (19), and the water reservoir is arranged below the evaporator (18) to collect and condense in the evaporator (18) Condensate on the upper side; the liquid level measuring instrument is used to measure the liquid level of the water reservoir.
The drying device for a dishwasher according to claim 4, further comprising a throttle valve (16), a compressor (12) and a condenser (14), which are connected with the evaporator (18) to form a heat pump system.
The dishwasher drying device according to claim 5, characterized in that the condenser (14) is arranged in the circulating air duct (19), close to the outlet end, and the evaporator (18) is close to The entrance end.
The drying device of the dishwasher according to claim 4, 5 or 6, characterized in that the inlet end or the outlet end is provided with a fan (13).
The drying device of a dishwasher according to claim 4, characterized in that the water reservoir comprises a water receiving tank (17) and a water storage tank (11), and the water receiving tank (17) is connected to the evaporator ( Below 18), it communicates with the water storage tank (11) through a diversion pipe (15), and the liquid level measuring instrument is arranged on the water storage tank (11).
The drying device of a dishwasher according to claim 8, wherein the liquid level measuring instrument comprises a water level sensor (10), and the water level sensor (10) is fixed at the bottom of the water storage tank (11) or Side.
A dishwasher, characterized by comprising the drying device of the dishwasher according to any one of claims 4-8.
The dishwasher according to claim 10, further comprising a drain pump, and the drain pump (9) is connected to the water storage tank (11).