A waste heat recovery device for a dishwasher and a dishwasher

Abstract

The utility model relates to a kind of waste heat recovery device and dishwasher for dishwasher, including heat preservation box, the heat preservation box has wastewater inlet, wastewater outlet, clean water inlet and clean water outlet respectively, wherein, wastewater inlet is used to with the drainage of the cleaning cavity of dishwasher Fluid communication, while clean water outlet is used to with the water inlet of the cleaning cavity Fluid communication, and, the heat preservation box is equipped with wastewater channel and clean water channel respectively, wherein, the wastewater inlet is connected with wastewater outlet by wastewater channel, while clean water inlet is connected with clean water outlet by clean water channel, and the wastewater in wastewater channel can exchange heat with clean water in clean water channel. Compared with prior art, the utility model can make the heat carried by wastewater to be transferred to clean water to preheat clean water, realize the recycling of wastewater waste heat, and wastewater waste heat recovery rate is high.

Description

Technical Field

[0001] This utility model relates to the field of dishwashers, and more particularly to a waste heat recovery device for a dishwasher and a dishwasher. Background Technology

[0002] A dishwasher is a device that automatically cleans tableware such as bowls, chopsticks, plates, dishes, knives, and forks. Currently, dishwashers on the market are mainly divided into two categories: household and commercial. Household dishwashers are only suitable for home use and mainly include cabinet-style, countertop, sink-integrated, and combined models. Commercial dishwashers can be classified into five main categories based on their structure: cabinet-style, hood-style, basket-type, belt-type, and ultrasonic. They reduce the workload of kitchen staff in restaurants, hotels, and government canteens, improve work efficiency, and enhance hygiene.

[0003] Furthermore, dishwashers generally use a heater to heat the washing water for circulating filtration and cleaning. After each wash, the wastewater is directly discharged through a drain pipe. For example, Chinese utility model patent ZL202322954003.6 (authorization announcement number CN222032284U) discloses a dishwasher structure, including a shell, an inner tub, a washing mechanism, a drain mechanism, and a water tank. The inner tub is set inside the shell, and the inner tub and the water tank are integrally formed. A spray arm is set at the bottom of the inner tub, and the spray arm is connected to the washing mechanism. A heating mechanism is set on the washing mechanism to heat the water passing through the washing mechanism. A water cup is set on the inner tub, and the water cup is equipped with a washing water outlet and a drain water outlet. The washing water outlet is connected to the washing mechanism, and the drain water outlet is connected to the drain mechanism. For example, there is the Chinese invention patent with application number CN202410368885.4 (publication number CN118303811A) and the Chinese utility model patent with patent number ZL 202323170296.5 (authorization announcement number CN221129815U).

[0004] However, the current method of directly discharging dishwasher wastewater leads to heat waste and needs further improvement. Summary of the Invention

[0005] The first technical problem to be solved by this utility model is to provide a waste heat recovery device for dishwashers with wastewater waste heat recovery and utilization function, which is in contrast to the prior art.

[0006] The second technical problem to be solved by this utility model is to provide a waste heat recovery device for dishwashers that has the function of wastewater waste heat recovery and utilization and has a high waste heat recovery rate, in contrast to the prior art.

[0007] The third technical problem to be solved by this utility model is to provide a dishwasher with the aforementioned waste heat recovery device, in contrast to the prior art.

[0008] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows: a waste heat recovery device for a dishwasher, characterized in that it includes an insulated box, which has a wastewater inlet, a wastewater outlet, a clean water inlet, and a clean water outlet, wherein the wastewater inlet is used to fluidly communicate with the drain outlet of the dishwasher's cleaning chamber, and the clean water outlet is used to fluidly communicate with the water inlet of the cleaning chamber.

[0009] Furthermore, the insulated box is equipped with a wastewater channel and a clean water channel. The wastewater inlet and outlet are connected through the wastewater channel, while the clean water inlet and outlet are connected through the clean water channel. The wastewater in the wastewater channel can exchange heat with the clean water in the clean water channel.

[0010] Furthermore, the insulated box's walls include an outer wall layer, an inner wall layer, and a vacuum layer located between the inner and outer wall layers. Designing the insulated box walls as double-layered with a vacuum layer better prevents heat loss through the walls, improving the insulation effect and thus increasing the wastewater heat recovery rate.

[0011] Furthermore, both the outer and inner wall layers are made of plastic. Plastic has poor thermal conductivity, so combining it with a vacuum layer helps to further improve the insulation effect of the insulated box.

[0012] Furthermore, the flow direction of the wastewater in the wastewater channel is opposite to the flow direction of the clean water in the clean water channel. This allows for better heat exchange between the wastewater in the wastewater channel and the clean water in the clean water channel.

[0013] Furthermore, the wastewater inlet and outlet are connected by a wastewater pipe. The pipe wall is made of a heat-conducting material, and its inner cavity forms the wastewater flow channel. The wastewater pipe is housed in an insulated box, and the wall of the wastewater pipe and the wall of the insulated box form the clean water flow channel. This facilitates the construction of wastewater and clean water flow channels within the insulated box, resulting in a simple internal structure for the waste heat recovery device. It also allows the wastewater pipe to be submerged in clean water, enabling more thorough heat exchange between the wastewater and clean water, thus improving the heat exchange rate between them.

[0014] Furthermore, the purified water inlet and outlet are connected by a purified water pipe, the inner cavity of which forms the purified water flow channel. This purified water pipe is housed within an insulated box, and the wall of the pipe and the wall of the insulated box together form the wastewater flow channel. This facilitates the construction of wastewater and purified water flow channels within the insulated box, resulting in a simple internal structure for the waste heat recovery device. It also allows the purified water pipe to be submerged in wastewater, enabling the purified water in the pipe to fully absorb the waste heat from the wastewater, thus improving the heat exchange rate between the wastewater and purified water.

[0015] Furthermore, the wastewater pipe extends in a wavy, curved shape, its size matching the internal volume of the insulation box, and it is centrally suspended within the insulation box, with gaps between it and the side walls of the box to allow water flow. Designing the wastewater pipe as wavy reduces the flow velocity of the wastewater, thereby enabling more thorough heat exchange between the wastewater and the purified water. In addition, while ensuring the flowability of purified water within the insulation box, the diameter of the wastewater pipe is designed to be as large as possible. This helps ensure efficient drainage from the cleaning chamber and also contributes to efficient heat exchange between the wastewater and purified water.

[0016] Furthermore, the purified water pipe extends in a wavy, curved shape, its size matching the internal volume of the insulated box, and it is centrally suspended within the insulated box, with gaps between it and the side walls of the insulated box to allow water flow. Designing the purified water pipe in a wavy shape reduces the flow velocity of the purified water within the pipe, thereby enabling more thorough heat exchange between the purified water and the wastewater. In addition, while ensuring the flowability of the wastewater within the insulated box, the diameter of the purified water pipe is designed to be as large as possible. This helps ensure both the efficiency of water intake into the cleaning chamber and the efficiency of heat exchange between the purified water and the wastewater.

[0017] Furthermore, the insulated box is rectangular in shape and horizontally positioned. The wastewater inlet, wastewater outlet, purified water inlet, and purified water outlet are located at the four corners of the insulated box, respectively. The wastewater inlet and outlet are located at different ends of the insulated box, as are the purified water inlet and outlet. This design facilitates the connection of pipelines for the wastewater inlet, outlet, and outlet, and also helps to extend the length of the wastewater and purified water flow channels, thereby prolonging the heat exchange time between the wastewater and purified water and thus helping to ensure the effective heat exchange between them.

[0018] The technical solution adopted to further solve the third technical problem mentioned above is: a dishwasher, characterized in that it includes a waste heat recovery device for the dishwasher as described above.

[0019] Compared with existing technologies, the advantages of this utility model are as follows: It includes an insulated box with a wastewater inlet, a wastewater outlet, a clean water inlet, and a clean water outlet. The wastewater inlet is fluidly connected to the drain outlet of the dishwasher's cleaning chamber, while the clean water outlet is fluidly connected to the inlet of the cleaning chamber. The wastewater after washing is discharged from the cleaning chamber through the drain outlet, then enters the wastewater channel through the wastewater inlet, and finally flows out from the wastewater outlet. Simultaneously, the clean water used for washing flows into the clean water channel through the clean water inlet, and finally flows into the cleaning chamber through the clean water outlet and the inlet. Because the wastewater in the wastewater channel can exchange heat with the clean water in the clean water channel, the heat carried by the wastewater can be transferred to the clean water to preheat it, achieving the recovery and utilization of wastewater heat. Furthermore, since both the wastewater channel and the clean water channel are located in the insulated box, heat loss during the heat exchange process between the wastewater and clean water can be avoided, ensuring a high wastewater heat recovery rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the dishwasher in Embodiment 1 of this utility model;

[0021] Figure 2 for Figure 1 A structural diagram from another direction;

[0022] Figure 3 This is a cross-sectional view of the dishwasher in Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the waste heat recovery device in Embodiment 1 of this utility model;

[0024] Figure 5 This is a cross-sectional view of the waste heat recovery device in Embodiment 1 of this utility model;

[0025] Figure 6 This is a cross-sectional view of the waste heat recovery device in Embodiment 2 of this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] Example 1:

[0029] like Figures 1-5 As shown, a dishwasher includes a waste heat recovery device, which includes an insulated box 1. The insulated box 1 has a wastewater inlet 11, a wastewater outlet 12, a clean water inlet 13, and a clean water outlet 14. The wastewater inlet 11 is in fluid communication with the drain outlet 21 of the dishwasher's washing chamber 2, while the clean water outlet 14 is in fluid communication with the water inlet 22 of the washing chamber 2. Furthermore, the insulated box 1 is provided with a wastewater channel 15 and a clean water channel 16. The wastewater inlet 11 and wastewater outlet 12 are connected through the wastewater channel 15, while the clean water inlet 13 and clean water outlet 14 are connected through the clean water channel 16. The wastewater in the wastewater channel 15 can exchange heat with the clean water in the clean water channel 16.

[0030] The insulated box 1 of this utility model has a wastewater inlet 11, a wastewater outlet 12, a clean water inlet 13, and a clean water outlet 14. The wastewater inlet 11 is in fluid communication with the drain outlet 21 of the dishwasher's cleaning chamber 2, while the clean water outlet 14 is in fluid communication with the water inlet 22 of the cleaning chamber 2. The wastewater after washing is discharged from the cleaning chamber 2 through the drain outlet 21, then enters the wastewater flow channel 15 through the wastewater inlet 11, and finally flows out from the wastewater outlet 12. Simultaneously, the clean water used for washing flows into the clean water flow channel 16 through the clean water inlet 13, and finally flows into the cleaning chamber 2 through the water inlet 22 via the clean water outlet 14. Since the wastewater in the wastewater channel 15 can exchange heat with the purified water in the purified water channel 16, the heat carried by the wastewater can be transferred to the purified water to preheat the purified water, thus realizing the recovery and utilization of wastewater waste heat. Furthermore, since both the wastewater channel 15 and the purified water channel 16 are set in the insulation box 1, heat loss during the heat exchange process between the wastewater and the purified water can be avoided, ensuring the wastewater waste heat recovery rate.

[0031] Furthermore, such as Figure 3 and Figure 5 As shown, the wall of the aforementioned insulated box 1 includes an outer wall layer 1a, an inner wall layer 1b, and a vacuum layer 1c located between the inner and outer wall layers. Designing the wall of the insulated box 1 as a double-layered structure with a vacuum layer 1c better prevents heat loss through the wall, thus improving the insulation effect of the insulated box 1 and consequently increasing the wastewater waste heat recovery rate. Preferably, both the outer wall layer 1a and the inner wall layer 1b are made of plastic. Plastic has poor thermal conductivity; therefore, combined with the vacuum layer 1c, it further enhances the insulation effect of the insulated box 1.

[0032] Furthermore, the flow direction of the wastewater in the wastewater channel 15 is opposite to the flow direction of the clean water in the clean water channel 16, thereby enabling the wastewater in the wastewater channel 15 to better exchange heat with the clean water in the clean water channel 16.

[0033] like Figure 5 As shown, the wastewater inlet 11 and wastewater outlet 12 are connected by a wastewater pipe 3. The wall of the wastewater pipe 3 is made of a heat-conducting material (specifically, a metal material in this embodiment), and its inner cavity forms the wastewater flow channel 15. The wastewater pipe 3 is housed in an insulated box 1, and the wall of the wastewater pipe 3 and the wall of the insulated box 1 form the clean water flow channel 16. This facilitates the construction of the wastewater flow channel 15 and the clean water flow channel 16 within the insulated box 1, simplifying the internal structure of the waste heat recovery device and allowing the wastewater pipe 3 to be submerged in clean water. This enables the wastewater in the wastewater pipe 3 to exchange heat more fully with the clean water, thus improving the heat exchange rate between the wastewater and the clean water.

[0034] Preferably, the wastewater pipe 3 extends in a wavy, curved shape, its size matching the internal volume of the insulation box 1, and it is centrally suspended within the insulation box 1, with gaps between it and the side walls of the insulation box 1 for water flow. Designing the wastewater pipe 3 as wavy reduces the flow velocity of the wastewater within it, thereby allowing for more thorough heat exchange between the wastewater and the purified water. Furthermore, while ensuring the fluidity of the purified water within the insulation box 1, the diameter of the wastewater pipe 3 is designed to be as large as possible. This helps ensure both the drainage efficiency of the cleaning chamber 2 and the heat exchange efficiency between the wastewater and purified water. In this embodiment, the extension direction of the inlet end of the wastewater pipe 3 is perpendicular to the extension direction of the outlet end, and the extension direction of the remaining straight sections is parallel to the extension direction of the inlet end (e.g., ...). Figure 5 As shown in the figure, this extends the flow time of wastewater in wastewater pipe 3 as much as possible while ensuring smooth flow of wastewater in wastewater pipe 3.

[0035] In addition, such as Figure 5As shown, in this embodiment, the wastewater inlet 11 is connected to the drain outlet 21 of the cleaning chamber 2 via the drain pipe 61, while the clean water inlet 13 is connected to the outlet of the water storage tank (not shown) via the outlet pipe 63, and the clean water outlet 14 is connected to the inlet 22 of the cleaning chamber 2 via the inlet pipe 62. The wastewater inlet 11 is provided with a first control valve 51 for controlling the opening and closing of the wastewater inlet 11, the clean water inlet 13 is provided with a second control valve 52 for controlling the opening and closing of the clean water inlet 13, and the clean water outlet 14 is provided with a third control valve 53 for controlling the opening and closing of the clean water outlet 14.

[0036] Furthermore, such as Figure 1 As shown, in this embodiment, the aforementioned insulated box 1 is disposed below the cleaning chamber 2, and the insulated box 1 is rectangular in shape and horizontally arranged. The wastewater inlet 11, wastewater outlet 12, clean water inlet 13, and clean water outlet 14 are respectively located at the four corners of the insulated box 1. Furthermore, the wastewater inlet 11 and wastewater outlet 12 are located at different ends of the insulated box 1, and the clean water inlet 13 and clean water outlet 14 are also located at different ends of the insulated box 1. This facilitates the connection of the pipelines for the wastewater inlet 11, wastewater outlet 12, clean water inlet 13, and clean water outlet 14, and also helps to extend the length of the wastewater flow channel 15 and the clean water flow channel 16, thereby extending the heat exchange time between the wastewater and the clean water, and thus helping to ensure the heat exchange effect between the two. In this embodiment, specifically, wastewater inlet 11 and purified water outlet 14 are located at one end of the insulation box 1, while wastewater outlet 12 and purified water inlet 13 are located at the other end of the insulation box 1. Wastewater inlet 11 and wastewater outlet 12 are arranged diagonally along the insulation box 1, as are purified water inlet 13 and purified water outlet 14. Furthermore, the diameters of wastewater inlet 11 and wastewater outlet 12 are larger than the diameters of purified water inlet 13 and purified water outlet 14, thereby maximizing the diameter of the wastewater pipe 3 and slowing down the flow rate of purified water within the insulation box 1.

[0037] Preferably, such as Figure 1 As shown, the insulated box 1 has a flat shape, which can make full use of the installation space under the washing chamber 2 inside the dishwasher, and also helps to further improve the heat exchange effect between wastewater and purified water.

[0038] Example 2:

[0039] like Figure 6As shown, unlike Embodiment 1, in this embodiment, the purified water inlet 13 and purified water outlet 14 are connected by a purified water pipe 4, the inner cavity of which forms the purified water flow channel 16. Furthermore, the purified water pipe 4 is suspended in the insulation box 1, and the wall of the purified water pipe 4 and the wall of the insulation box 1 form the wastewater flow channel 15. This facilitates the construction of the wastewater flow channel 15 and the purified water flow channel 16 within the insulation box 1, resulting in a simple internal structure for the waste heat recovery device. It also allows the purified water pipe 4 to be submerged in wastewater, enabling the purified water in the pipe 4 to fully absorb the waste heat from the wastewater, thus improving the heat exchange rate between the wastewater and purified water.

[0040] Furthermore, the aforementioned water purification pipe 4 extends in a wavy, curved shape, its size matching the internal volume of the insulation box 1, and it is centrally housed within the insulation box 1, with gaps between it and each side wall of the insulation box 1 for water flow. Designing the water purification pipe 4 as wavy reduces the flow velocity of the purified water within it, thereby allowing for more thorough heat exchange between the purified water and the wastewater. In addition, while ensuring the flowability of the wastewater within the insulation box 1, the diameter of the water purification pipe 4 is designed to be as large as possible. This helps ensure both the water intake efficiency of the cleaning chamber 2 and the heat exchange efficiency between the purified water and the wastewater.

[0041] In this embodiment, the extension direction of the water inlet end of the water purification pipe 4 is perpendicular to the extension direction of the water outlet end, and the extension direction of the straight sections of the remaining pipe sections is parallel to the extension direction of the water inlet end. This ensures that the purified water flows smoothly in the water purification pipe 4 while maximizing the flow time of the purified water in the water purification pipe 4. Furthermore, the diameters of the purified water inlet 13 and the purified water outlet 14 are larger than the diameters of the wastewater inlet 11 and the wastewater outlet 12, thereby maximizing the diameter of the water purification pipe 4 and slowing down the flow rate of wastewater in the insulation box 1.

[0042] In another embodiment, the dishwasher of this invention can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the dishwasher to perform corresponding operations, thereby realizing intelligent control of the dishwasher and improving the user experience.

[0043] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A waste heat recovery device for a dishwasher, characterized in that, The device includes an insulated box (1), which has a wastewater inlet (11), a wastewater outlet (12), a clean water inlet (13), and a clean water outlet (14). The wastewater inlet (11) is fluidly connected to the drain outlet (21) of the washing chamber (2) of the dishwasher, while the clean water outlet (14) is fluidly connected to the water inlet (22) of the washing chamber (2). Furthermore, the insulated box (1) is provided with a wastewater channel (15) and a clean water channel (16), wherein the wastewater inlet (11) and the wastewater outlet (12) are connected through the wastewater channel (15), and the clean water inlet (13) and the clean water outlet (14) are connected through the clean water channel (16), and the wastewater in the wastewater channel (15) can exchange heat with the clean water in the clean water channel (16).

2. The waste heat recovery device for a dishwasher as described in claim 1, characterized in that, The walls of the insulated box (1) include an outer wall layer (1a), an inner wall layer (1b), and a vacuum layer (1c) located between the outer wall layer (1a) and the inner wall layer (1b).

3. The waste heat recovery device for a dishwasher as described in claim 2, characterized in that, Both the outer wall layer (1a) and the inner wall layer (1b) are made of plastic.

4. The waste heat recovery device for a dishwasher according to claim 1, wherein The flow direction of wastewater in the wastewater channel (15) is opposite to the flow direction of clean water in the clean water channel (16).

5. The waste heat recovery device for a dishwasher according to any one of claims 1 to 4, characterized in that, The wastewater inlet (11) and wastewater outlet (12) are connected by a wastewater pipe (3). The wall of the wastewater pipe (3) is made of a heat-conducting material and its inner cavity forms the wastewater flow channel (15). The wastewater pipe (3) is housed in an insulated box (1), and the wall of the wastewater pipe (3) and the wall of the insulated box (1) form the clean water flow channel (16).

6. The waste heat recovery device for a dishwasher according to any one of claims 1 to 4, characterized in that, The purified water inlet (13) and purified water outlet (14) are connected by a purified water pipe (4). The inner cavity of the purified water pipe (4) forms the purified water flow channel (16). The purified water pipe (4) is housed in the heat preservation box (1), and the pipe wall of the purified water pipe (4) and the box wall of the heat preservation box (1) form the wastewater flow channel (15).

7. The waste heat recovery device for a dishwasher according to claim 5, wherein The wastewater pipe (3) extends in a wavy shape, and its size matches the inner cavity volume of the insulation box (1). It is suspended in the center of the insulation box (1) and there are gaps between it and the side walls of the insulation box (1) to allow water to flow through.

8. The waste heat recovery device for a dishwasher according to claim 6, wherein The water purification pipe (4) extends in a wavy shape, and its size matches the inner cavity volume of the heat preservation box (1). It is suspended in the center of the heat preservation box (1) and there are gaps between it and the side walls of the heat preservation box (1) to allow water to flow through.

9. The waste heat recovery device for a dishwasher as described in any one of claims 1 to 4, characterized in that, The insulated box (1) is rectangular in shape and horizontally arranged. The wastewater inlet (11), wastewater outlet (12), clean water inlet (13) and clean water outlet (14) are respectively located at the four corners of the insulated box (1). The wastewater inlet (11) and wastewater outlet (12) are located at different ends of the insulated box (1), while the clean water inlet (13) and clean water outlet (14) are located at different ends of the insulated box (1).

10. A dishwasher, characterized in that Includes the waste heat recovery device for a dishwasher as described in any one of claims 1 to 9.

Images