Dishwasher

Abstract

The present invention discloses a dishwasher, which is formed with a high-temperature area and a low-temperature area, and the temperature of the high-temperature area is higher than that of the low-temperature area; moreover, the dishwasher is provided with an exhaust air duct communicating from the inner cavity of the dishwasher to the outside. The exhaust air duct includes an intake section located in the low-temperature area and an outlet section located in the high-temperature area, so that the air pressure in the intake section is higher than that in the outlet section, thereby accelerating the exhaust of air flow through the temperature difference. The exhaust air duct described in the present invention solves the problems of excessive air pressure in the inner tank caused by a long air duct and condensation at the outlet of a short air duct by using the method of accelerating the air flow through the temperature difference.

Description

Technical Field

[0001] The present invention belongs to the field of exhaust, and particularly relates to a dishwasher. Background Art

[0002] With the continuous improvement of the performance requirements of dishwashers, users are paying more and more attention to the drying effect of tableware after washing. Traditional dishwashers can no longer meet the needs of users for tableware. Existing dishwashers have multiple functions such as rinsing, high-temperature disinfection, and drying. Therefore, the air in the inner cavity is in a high-temperature and high-humidity state. In order to prevent the air from pushing open the door body, the dishwasher is provided with an exhaust air duct to discharge the humid and hot air inside the dishwasher to the outside of the dishwasher.

[0003] However, if the exhaust air duct is too long, the gas in the inner tank is not easy to discharge, resulting in too high pressure in the inner cavity of the dishwasher, and the door body is accidentally pushed open by the pressure during the working process; if the air duct is too short, the gas is not fully condensed during exhaust, and it is easy to form condensate droplets at the air outlet, wetting the ground and reducing the user experience.

[0004] In the prior art, the air exchange of the dishwasher mainly ventilates through the intake and exhaust fans, and the exhaust air duct is connected in series in the exhaust air duct. The flow rate of the exhaust air duct is increased through the fan to ensure the exhaust efficiency of the exhaust air duct. However, the energy consumption of the fan is relatively high, which further increases the energy consumption of the dishwasher and is not conducive to meeting the energy consumption requirements of the dishwasher. Summary of the Invention

[0005] The present invention provides a dishwasher to solve the technical problem of high existing exhaust energy consumption mentioned in the background art.

[0006] To achieve the above object, the specific technical solution of the dishwasher of the present invention is as follows:

[0007] A dishwasher is formed with a high-temperature area and a low-temperature area, and the temperature of the high-temperature area is higher than that of the low-temperature area; an exhaust air duct is provided that communicates from the inner cavity of the dishwasher to the outside. The exhaust air duct includes an intake section located in the low-temperature area and an outlet section located in the high-temperature area, so that the air pressure of the intake section is higher than that of the outlet section to accelerate the discharge of the air flow through the temperature difference.

[0008] Further, one end of the intake section extends to form an intake port, and a first heat exchange part is formed on the outer wall of the other end; the intake port communicates with the inner cavity, and the first heat exchange part is located on the side of the dishwasher close to the outside.

[0009] Further, a second heat exchange part is formed on the outer wall of one end of the outlet section, and the other end extends to form an outlet port; the second heat exchange part is located on the side of the dishwasher close to the inner cavity, and the outlet port communicates with the outside.

[0010] Further, heat dissipation fins are formed on the first heat exchange part.

[0011] Further, the exhaust air duct is arranged in a meandering shape.

[0012] Further, the air inlet is connected to the first heat exchange part through a first meandering pipe, with one end of the first meandering pipe close to the inner cavity and the other end close to the outside.

[0013] Further, the second heat exchange part is connected to the air outlet through a second meandering pipe, with one end of the second meandering pipe close to the inner cavity and the other end close to the outside.

[0014] Further, the air inlet is lower than the air outlet, so that the condensed water can flow back and be discharged from the air inlet.

[0015] Further, the exhaust air duct is formed with a bent part, and a return pipe communicating with the air inlet is provided at the bent part for the condensed water to flow back.

[0016] Further, the exhaust air duct is arranged inside the door body, the first heat exchange part is attached to the outer door of the door body, and the second heat exchange part is attached to the inner door of the door body.

[0017] The dishwasher of the present invention has the following advantages:

[0018] 1. Since the temperature of the inner cavity is relatively high when the dishwasher is working and after working, if this thermal energy is not utilized, it will only dissipate in the air. Therefore, by using the temperature difference generated by this part of the thermal energy and adopting the method of accelerating the air flow through the temperature pressure difference, the problems of too high air pressure in the inner cavity caused by a long air duct and condensation at the outlet of a short air duct can be solved. Thus, by reasonably utilizing this thermal energy, it is possible to accelerate the gas flow rate without additional power consumption, achieving energy conservation and environmental protection.

[0019] 2. Since water flows downward under the influence of gravity, when the air inlet is lower than the air outlet, the condensed water will gradually flow back from the upper air outlet to the air inlet, preventing the condensed water from being discharged. Specifically, if the exhaust air duct extends gradually upward, the condensed water can be discharged smoothly; if the exhaust air duct does not extend gradually upward, the meandering exhaust air duct will form a bent part. Since the bent part will accumulate condensed water and cause the exhaust air duct to be blocked, a return pipe is provided to discharge the condensed water accumulated in the bent part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the dishwasher of the present invention;

[0021] Figure 2 is an exploded view of the dishwasher of the present invention;

[0022] Figure 3 is a cross-sectional view of the door body of the dishwasher of the present invention;

[0023] Figure 4 is a schematic structural diagram of the exhaust air duct of the present invention.

[0024] Description of the marks in the figure:

[0025] 1. Inner cavity; 2. Door body; 21. Inner door; 22. Outer door; 3. Intake section; 31. Intake port; 32. First heat exchange section; 33. Heat dissipation fins; 4. Exhaust section; 41. Second heat exchange section; 42. Exhaust port; 5. Return pipe. Detailed implementation manner

[0026] In order to better understand the purpose, structure and function of the present invention, the following further describes a dishwasher of the present invention in detail with reference to the accompanying drawings.

[0027] As Figures 1 - 4 shown, the dishwasher of the present invention includes a body provided with an inner cavity, for rinsing, disinfecting and drying tableware in the inner cavity. The inner cavity is filled with hot and humid air. In order to prevent the door body from being pushed open by the hot and humid air, the dishwasher is provided with an exhaust air duct for connecting the inner cavity 1 of the dishwasher to the outside, so as to discharge the hot and humid gas in the inner cavity 1 of the dishwasher from the inner cavity 1 of the dishwasher to the outside, ensuring the balance of internal and external air pressures.

[0028] The dishwasher forms a high-temperature area and a low-temperature area, and the temperature of the high-temperature area is higher than that of the low-temperature area. Note that the high-temperature area and the low-temperature area here are relative, not absolute. Since the dishwasher naturally generates heat during operation, the area where the energy-consuming mechanism of the dishwasher is located is naturally the high-temperature area, and the surface area of the dishwasher is the low-temperature area relative to the area where the energy-consuming mechanism is located. And the surface area of the dishwasher is a high-temperature area relative to the outside world, while the outside world is a low-temperature area.

[0029] The exhaust air duct includes an intake section 3 located in the low-temperature area and an exhaust section 4 located in the high-temperature area, so that the air pressure in the intake section 3 is higher than the air pressure in the exhaust section 4, so as to accelerate the air flow through the temperature difference and improve the exhaust efficiency of the exhaust air duct. Thus, the effect of high-efficiency exhaust of the exhaust air duct can be achieved without setting a fan, and relative to the fan, using the temperature difference automatically generated by the operation of the dishwasher, no additional energy consumption will be generated.

[0030] The exhaust air duct is generally arranged on the door body 2. The side of the door body 2 close to the inner cavity 1 is the inner door 21, and the side of the door body 2 located outside is the outer door 22. Since there is hot and humid air in the inner cavity 1, the inner door 21 is the high-temperature area, and the outer door 22 is the low-temperature area.

[0031] Correspondingly, one end of the intake section 3 extends to form an intake port 31, and a first heat exchange section 32 is formed on the outer wall of the other end. Among them, the intake port 31 is located on the inner door 21 for discharging the hot and humid air in the inner cavity 1. And the first heat exchange section 32 is attached to the outer door 22, so as to ensure that the intake section 3 is located in the low-temperature area.

[0032] One end of the air outlet section 4 has a second heat exchange part 41 formed on the outer wall, and the other end extends to form an air outlet 42. Among them, the second heat exchange part 41 is attached to the inner door 21, so as to ensure that the air outlet section 4 is located in the high-temperature area. The air outlet 42 is located on the outer door 22 for discharging the humid and hot air in the exhaust air duct.

[0033] Moreover, heat dissipation fins 33 are formed on the first heat exchange part 32 to increase the heat exchange speed.

[0034] In addition, the length of the exhaust air duct is also required to enable the steam to condense in the exhaust air duct. Therefore, the exhaust air duct needs to be arranged in a meandering manner. Common meandering arrangements include setting along a spiral line, a wavy line, a broken line, etc. In short, by turning back, the length can be maximally extended within a limited space.

[0035] For the specific meandering arrangement, for example, between the air inlet 31 and the first heat exchange part 32, between the first heat exchange part 32 and the second heat exchange part 41, and between the second heat exchange part 41 and the air outlet 42 are all connected by meandering pipes. One end of the meandering pipe is located at the inner door 21, and the other end is at the outer door 22. They can be named the first meandering pipe, the second meandering pipe, and the third meandering pipe in sequence. Overall, for example, when the meandering pipe is an inclined pipe, the entire exhaust air duct is arranged along a broken line.

[0036] Of course, in addition to being arranged on the door body 2, it can also be arranged on the side walls and the top wall of the dishwasher. And correspondingly, a pressure balance structure should be provided at a certain place in the dishwasher inner tank so that after the air in the air duct is discharged, the outside atmosphere can be supplemented in time.

[0037] Moreover, in order to prevent the water vapor from generating condensed water, the air inlet 31 is lower than the air outlet 42, so that the condensed water can flow back and be discharged from the air inlet 31. And the exhaust passage gradually extends upward from the air inlet 31 to the air outlet 42 to prevent the condensed water from accumulating in the exhaust air duct. And if the exhaust air duct is as Figure 2 described, and does not gradually extend upward, then the meandering exhaust air duct has a bent part, and a return pipe 5 communicating with the air inlet 31 is provided at the bent part for the condensed water to flow back.

[0038] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A dishwasher is formed with a high-temperature area and a low-temperature area, and the temperature of the high-temperature area is higher than that of the low-temperature area; it is characterized in that, An exhaust air duct is provided that communicates from the inner cavity of the dishwasher to the outside. The exhaust air duct includes an intake section located in the low-temperature area and an outlet section located in the high-temperature area, such that the air pressure in the intake section is higher than that in the outlet section to accelerate the discharge of the air flow through the temperature difference; One end of the intake section extends to form an air inlet, and a first heat exchange portion is formed on the outer wall of the other end; the air inlet communicates with the inner cavity, and the first heat exchange portion is located on the side of the dishwasher close to the outside; A second heat exchange portion is formed on the outer wall of one end of the outlet section, and the other end extends to form an air outlet; the second heat exchange portion is located on the side of the dishwasher close to the inner cavity, and the air outlet communicates with the outside; The exhaust air duct is arranged in a meandering manner.

2. The dishwasher according to claim 1, characterized in that, Heat dissipation fins are formed on the first heat exchange portion.

3. The dishwasher according to claim 1, characterized in that, The air inlet and the first heat exchange portion are connected by a first meandering pipe, with one end of the first meandering pipe close to the inner cavity and the other end close to the outside.

4. The dishwasher according to claim 1 or 3, characterized in that, The second heat exchange portion and the air outlet are connected by a second meandering pipe, with one end of the second meandering pipe close to the inner cavity and the other end close to the outside.

5. The dishwasher according to claim 1, characterized in that, The air inlet is lower than the air outlet so that the condensed water can flow back and be discharged from the air inlet.

6. The dishwasher according to claim 5, characterized in that, The exhaust air duct is formed with a bent portion, and a return pipe communicating with the air inlet is provided at the bent portion for the condensed water to flow back.

7. The dishwasher according to claim 1, characterized in that, The exhaust air duct is arranged in the door body, the first heat exchange portion is attached to the outer door of the door body, and the second heat exchange portion is attached to the inner door of the door body.

Images