Dish washing machine with waste heat recovery function

Abstract

The dish washing machine with the waste heat recovery function comprises a lower main body, a control panel, a cleaning bin and an upper cover, the control panel is installed on the front face of the lower main body, the cleaning bin is installed in the lower main body, the upper cover is movably connected to the upper portion of the lower main body, a spraying mechanism is installed in the lower main body, and the upper cover is movably connected to the lower portion of the lower main body. Three water tanks, namely a rinsing water tank, a circulating water tank and a waste heat recovery water tank, are mounted in the lower main body; and the circulating water tank is communicated with the spraying mechanism through a circulating water pump. The utility model has the advantages that cold tap water flows into the rinsing water tank to be supplemented (about 4L) for utilization after being preheated and heated by the heat exchange water pipe. Therefore, one-time cleaning process and waste heat recovery are completed, waste heat of rinsing waste heat water is fully utilized, heat exchange (preheating) is conducted on normal-temperature tap water, compared with a dishwasher without waste heat recovery on the market, energy is saved by 50%, and the dishwasher is more economical and environmentally friendly.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, and in particular to a dishwasher with waste heat recovery. Background Technology

[0002] The most common type of commercial dishwasher on the market is the top-loading dishwasher, which uses water jets to wash the dishes.

[0003] The operating procedure is to push the dishes into the washing chamber from the dish rack, pull down the lid, and the dishwasher will automatically wash.

[0004] Its automatic cleaning process is as follows:

[0005] 1. Main wash: Use circulating water (60℃) to spray in a 360° rotating manner, rinse (about 1 minute) and then stop;

[0006] 2. Rinse: Spray the tableware with tap water (90℃) in a 360° rotating motion to rinse away any residual circulating water on the surface of the tableware, thus completing the cleaning process.

[0007] The main wash uses 60°C circulating water for continuous washing, while the rinsing uses 90°C clean tap water, which is not recycled and consumes approximately 4 liters of water. After rinsing, the tap water flows into the circulating water tank and is discharged from the machine through the overflow outlet. Therefore, it removes 4 liters of water containing 60-90°C heat (approximately 200 kcal). Each washing cycle takes about 2 minutes, and 30 washes per hour remove 6000 kcal (equivalent to the heat generated by 7 kilowatt-hours of electricity).

[0008] This application utilizes the wasted heat for heat exchange (preheating) of room temperature tap water, resulting in 50% energy savings compared to dishwashers on the market that do not recover waste heat. Utility Model Content

[0009] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0010] Therefore, one objective of this utility model is to propose a dishwasher with waste heat recovery to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0011] To achieve the above objectives, one embodiment of the present invention provides a dishwasher with waste heat recovery, comprising a lower body, a control panel, a cleaning chamber, and a top cover. The control panel is mounted on the front of the lower body, the cleaning chamber is installed inside the lower body, and the top cover is movably connected to the upper part of the lower body.

[0012] The lower main body is equipped with a spraying mechanism, and three water tanks are installed inside the lower main body: a rinsing water tank, a circulating water tank, and a waste heat recovery water tank. The circulating water tank is connected to the spraying mechanism through a circulating water pump.

[0013] The rinsing water tank is connected to the spraying mechanism via a rinsing water pump;

[0014] The circulating water tank is connected to the waste heat recovery water tank through a hot water inlet pipe;

[0015] A guide plate is fixedly connected inside the waste heat recovery water tank, and a gap is left between the inner wall of the waste heat recovery water tank and the guide plate;

[0016] The bottom of the guide plate has a notch, and a drainer is fixedly connected inside the waste heat recovery water tank. A hot water overflow outlet is provided at the top of the drainer.

[0017] The guide plate is internally fixedly connected to a heat exchange water pipe, which is a multi-layer coiled type. One end of the heat exchange water pipe is a cold water outlet and the other end is a cold water inlet.

[0018] Preferably, as described in any of the above embodiments, a handle is installed on the side of the upper cover, and the lower body and the outer shell of the upper cover are both made of 304 stainless steel.

[0019] The above technical solution is adopted: Cleaning process: First, spray continuously for 70 seconds, then rinse and spray for 12 seconds;

[0020] The circulating water pump draws circulating water (60℃) from the circulating water tank, pumps it into the circulating pipeline, and sprays it out from the circulating spray bar. After cleaning the tableware, the circulating water flows back to the circulating water tank.

[0021] After the circulating spray, a rinsing spray is performed: the rinsing water pump draws heated tap water (90℃) from the rinsing water tank, pumps it into the rinsing pipeline, and sprays it out from the rinsing spray bar. The tap water (90℃) rinses the tableware and then flows back to the circulating water tank (about 4L) to mix with the circulating water (60℃). At this time, the circulating water tank has an extra 4L of water (about 65℃ after mixing), which flows into the waste heat recovery water tank through the overflow pipe. The waste heat recovery water tank uses the extra 4L of hot water to preheat the tap water. The cold tap water is preheated through the heat exchange water pipe 13 and then flows into the rinsing water tank to replenish it (about 4L) for use.

[0022] This completes one cleaning process and waste heat recovery.

[0023] Preferably, in any of the above embodiments, the spraying mechanism is divided into two symmetrical groups, each group including a rotatable rinsing spray bar and a rotatable circulating spray bar.

[0024] This device is a commercial dishwasher, designed with waste heat recovery function to greatly save energy.

[0025] The cleaning principle of this device is as follows: Circulating spray: The circulating water pump pumps water into the main circulating water pipe, and the water is divided into two paths through the main water distribution connector. One path is sprayed out from the circulating spray bar through the lower circulating branch pipe and the lower water distribution connector, and the other path is sprayed out from the circulating spray bar through the upper circulating branch pipe and the upper water distribution connector. The space between the upper and lower circulating spray bars forms a cleaning space, and the tableware is placed in this space for cleaning.

[0026] Rinse spray: The rinsing water pump pumps high-temperature hot water into the main rinsing water pipe. The water is divided into two streams through the main water distribution connector. One stream passes through the lower rinsing water distribution pipe and the lower water distribution connector and sprays out from the rinsing spray bar. The other stream passes through the upper rinsing water distribution pipe and the upper water distribution connector and sprays out from the rinsing spray bar. A rinsing space is formed between the upper and lower rinsing spray bars. The tableware is placed in this space for rinsing.

[0027] Preferably, in any of the above embodiments, the end of the hot water inlet pipe is connected to the aperture between the guide plate and the inner wall of the waste heat recovery water tank, and a top cover with a hole in the middle is placed on top of the guide plate.

[0028] Working principle of waste heat recovery water tank: Hot water enters the waste heat exchange water tank, and the waste hot water is drawn from the water surface through the guide plate.

[0029] The water is guided to the bottom and then flows back to the hot water overflow outlet at the top, where it is drained away through the overflow lever from the hot water drainer. This process allows the residual hot water to fully contact the heat exchange water pipe for heat exchange. The tap water flows into the heat exchange water pipe from the cold water inlet, passes through the spiral water path and is preheated with the residual hot water in the waste heat recovery water tank before flowing out from the cold water outlet for later use.

[0030] Preferably, the guide plate is welded to the waste heat recovery water tank or connected by screws, according to any of the above solutions.

[0031] Preferably, the heat exchange water pipe is made of copper, as described in any of the above embodiments.

[0032] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0033] This dishwasher with waste heat recovery system utilizes a combination of a waste heat recovery water tank, a circulating water pump, a hot water inlet pipe, a baffle plate, a drain, a heat exchange water pipe, a cold water outlet, and a cold water inlet. After circulating spraying, it performs a rinsing spray: the rinsing water pump draws heated tap water (90℃) from the rinsing water tank, pumps it into the rinsing pipe, and sprays it out from the rinsing spray bar. The tap water (90℃) rinses the dishes and then flows back to the circulating water tank (approximately 4L) to mix with the circulating water (60℃). At this point, the circulating water tank has an extra 4L of water (approximately 65℃ after mixing), which overflows into the waste heat recovery water tank. The waste heat recovery water tank uses the extra 4L of hot water to preheat the tap water. The cold tap water, after being preheated by the heat exchange water pipe, flows into the rinsing water tank to replenish it (approximately 4L) for reuse.

[0034] This completes a cleaning process and waste heat recovery, allowing the device to fully utilize the waste heat from rinsing and exchange heat with (preheat) the room temperature tap water. Compared to dishwashers on the market that do not have waste heat recovery, it saves 50% on energy, making it more economical and environmentally friendly.

[0035] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0038] Figure 2 This is a schematic diagram of the spraying mechanism of this utility model;

[0039] Figure 3 This is a schematic diagram of the overall structure of the waste heat recovery water tank of this utility model;

[0040] Figure 4 This is a schematic diagram of the lower structure of the waste heat recovery water tank of this utility model;

[0041] Figure 5 This is a schematic diagram illustrating the principle and structure of waste heat recovery according to this utility model.

[0042] In the diagram: 1-Lower main body, 2-Control panel, 3-Cleaning chamber, 4-Top cover, 5-Spraying mechanism, 6-Rinse water tank, 7-Circulating water tank, 8-Waste heat recovery water tank, 9-Circulating water pump, 10-Hot water inlet pipe, 11-Baffle plate, 12-Drainer, 13-Heat exchange water pipe, 14-Cold water outlet, 15-Cold water inlet. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] like Figures 1-5 As shown, this dishwasher with waste heat recovery includes a lower body 1, a control panel 2, a cleaning chamber 3 and a top cover 4. The control panel 2 is installed on the front of the lower body 1, the cleaning chamber 3 is installed inside the lower body 1, and the top cover 4 is movably connected to the top of the lower body 1.

[0046] The lower main body 1 is equipped with a spray mechanism 5. The lower main body 1 is also equipped with three water tanks: a rinsing water tank 6, a circulating water tank 7, and a waste heat recovery water tank 8. The circulating water tank 7 is connected to the spray mechanism 5 through a circulating water pump 9.

[0047] The rinsing water tank 6 is connected to the spraying mechanism 5 via a rinsing water pump;

[0048] The circulating water tank 7 is connected to the waste heat recovery water tank 8 via a hot water inlet pipe 10;

[0049] A guide plate 11 is fixedly connected inside the waste heat recovery water tank 8, and a gap is left between the inner wall of the waste heat recovery water tank 8 and the guide plate 11.

[0050] The bottom of the baffle plate 11 has a notch, and the drainer 12 is fixedly connected inside the waste heat recovery water tank 8. A hot water overflow outlet is provided at the top of the drainer 12.

[0051] The heat exchange water pipe 13 is fixedly connected inside the baffle plate 11. The heat exchange water pipe 13 is a multi-layer coiled type. One end of the heat exchange water pipe 13 is a cold water outlet 14 and the other end is a cold water inlet 15.

[0052] Example 1: A handle is installed on the side of the upper cover 4. The outer shell of both the lower main body 1 and the upper cover 4 is made of 304 stainless steel. The spray mechanism 5 is divided into two symmetrical groups, each group including a rotatable rinsing spray bar and a rotatable circulating spray bar. This device is a commercial dishwasher, designed with waste heat recovery function to greatly save energy.

[0053] Example 2: Hot water enters the waste heat exchange tank 8, and is guided from the surface to the bottom by the guide plate 11, then flows back to the hot water overflow outlet at the top, and is discharged from the hot water drain 12 via the overflow lever. This process allows the waste hot water to fully contact the heat exchange water pipe 13 for heat exchange. Cold tap water flows into the heat exchange water pipe 13 from the cold water inlet 15, passes through the spiral water path and preheats with the waste hot water in the waste heat recovery tank 8, and then flows out from the cold water outlet 14 for later use. The guide plate 11 is welded to the waste heat recovery tank 8 or connected by screws. The heat exchange water pipe 13 is made of copper.

[0054] The working principle of this utility model is as follows:

[0055] Washing process: First, spray continuously for 70 seconds, then rinse and spray for 12 seconds;

[0056] The circulating water pump 9 draws circulating water (60℃) from the circulating water tank 7, pumps it into the circulating pipeline, and sprays it out from the circulating spray bar. After cleaning the tableware, the circulating water flows back to the circulating water tank.

[0057] The cleaning principle of this device is as follows: Circulating spray: The circulating water pump 9 pumps water into the main circulating water pipe, and the water is divided into two paths through the main water distribution connector. One path is sprayed out from the circulating spray rod through the lower circulating branch pipe and the lower water distribution connector, and the other path is sprayed out from the circulating spray rod through the upper circulating branch pipe and the upper water distribution connector. The space between the upper and lower circulating spray rods forms a cleaning space, and the tableware is placed in this space for cleaning.

[0058] Rinse spray: The rinsing water pump pumps high-temperature hot water into the main rinsing water pipe. The water is divided into two streams through the main water distribution connector. One stream passes through the lower rinsing water distribution pipe and the lower water distribution connector and sprays out from the rinsing spray bar. The other stream passes through the upper rinsing water distribution pipe and the upper water distribution connector and sprays out from the rinsing spray bar. A rinsing space is formed between the upper and lower rinsing spray bars. The tableware is placed in this space for rinsing.

[0059] After the circulating spray, a rinsing spray is performed: the rinsing water pump draws heated tap water (90℃) from the rinsing water tank 6, pumps it into the rinsing pipeline, and sprays it out from the rinsing spray bar. The tap water (90℃) rinses the tableware and then flows back to the circulating water tank 7 (about 4L) to mix with the circulating water (60℃). At this time, the circulating water tank 7 has an extra 4L of water (about 65℃ after mixing), which flows into the waste heat recovery water tank 8 through the overflow pipe. The waste heat recovery water tank uses the extra 4L of hot water to preheat the tap water. The cold tap water is preheated through the heat exchange water pipe 13 and then flows into the rinsing water tank for replenishment (about 4L) for use.

[0060] This completes one cleaning process and waste heat recovery.

[0061] Compared with the prior art, the present invention has the following advantages:

[0062] This dishwasher with waste heat recovery system utilizes a combination of a waste heat recovery water tank 8, a circulating water pump 9, a hot water inlet pipe 10, a baffle plate 11, a drain 12, a heat exchange water pipe 13, a cold water outlet 14, and a cold water inlet 15. After circulating spraying, it performs a rinsing spray: the rinsing water pump draws heated tap water (90℃) from the rinsing water tank 6, pumps it into the rinsing pipeline, and sprays it out from the rinsing spray bar. The tap water (90℃) rinses the dishes and then flows back to the circulating water tank 7 (approximately 4L) to mix with the circulating water (60℃). At this time, the circulating water tank 7 has an extra 4L of water (approximately 65℃ after mixing), which flows into the waste heat recovery water tank 8 through the overflow pipe. The waste heat recovery water tank uses the extra 4L of hot water to preheat the tap water. The cold tap water, after being preheated by the heat exchange water pipe 13, flows into the rinsing water tank for replenishment (approximately 4L) for use.

[0063] This completes a cleaning process and waste heat recovery, allowing the device to fully utilize the waste heat from rinsing and exchange heat with (preheat) the room temperature tap water. Compared to dishwashers on the market that do not have waste heat recovery, it saves 50% on energy, making it more economical and environmentally friendly.

Claims

1. A dishwasher with waste heat recovery, characterized in that, It includes a lower body (1), a control panel (2), a cleaning chamber (3) and a top cover (4). The control panel (2) is installed on the front of the lower body (1), the cleaning chamber (3) is installed inside the lower body (1), and the top cover (4) is movably connected to the top of the lower body (1). The lower main body (1) is equipped with a spraying mechanism (5). The lower main body (1) is equipped with three water tanks, namely a rinsing water tank (6), a circulating water tank (7) and a waste heat recovery water tank (8). The circulating water tank (7) is connected to the spraying mechanism (5) through a circulating water pump (9). The rinsing water tank (6) is connected to the spraying mechanism (5) via a rinsing water pump; The circulating water tank (7) is connected to the waste heat recovery water tank (8) through a hot water inlet pipe (10); The waste heat recovery water tank (8) is fixedly connected to a guide plate (11), and there is a gap between the inner wall of the waste heat recovery water tank (8) and the guide plate (11); The guide plate (11) has a notch at the bottom, and a drainer (12) is fixedly connected inside the waste heat recovery water tank (8). A hot water overflow port is provided at the top of the drainer (12). The guide plate (11) is internally fixedly connected to a heat exchange water pipe (13), which is a multi-layer coiled type. One end of the heat exchange water pipe (13) is a cold water outlet (14), and the other end is a cold water inlet (15).

2. A dishwasher with waste heat recovery as described in claim 1, characterized in that: The upper cover (4) is equipped with a handle on its side, and the outer shell of the lower body (1) and the upper cover (4) are both made of (304) stainless steel.

3. A dishwasher with waste heat recovery as described in claim 2, characterized in that: The spraying mechanism (5) is divided into two symmetrical groups, each group including a rotatable rinsing spray bar and a rotatable circulating spray bar.

4. A dishwasher with waste heat recovery as described in claim 3, characterized in that: The end of the hot water inlet pipe (10) is connected to the aperture between the guide plate (11) and the inner wall of the waste heat recovery water tank (8), and a top cover with a hole in the middle is covered on the top of the guide plate (11).

5. A dishwasher with waste heat recovery as described in claim 4, characterized in that: The guide plate (11) is welded to or connected to the waste heat recovery water tank (8) by screws.

6. A dishwasher with waste heat recovery as described in claim 5, characterized in that: The heat exchange water pipe (13) is made of copper.

Images