Double-cylinder double-spraying double-drying dish washing machine with multi-stage heat recovery structure
By installing independent heat recovery coils in the main wash, rinse, and dry zones of the dishwasher, the problem of waste heat not being recovered in stages in existing technologies is solved, achieving efficient heat recovery, reducing heating energy consumption, and improving energy utilization.
Patent Information
- Application Number
- CN202522664442.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-16
AI Technical Summary
Existing dishwashers fail to effectively classify and recover the low- and medium-temperature waste heat generated during the main wash, rinsing, and drying stages, resulting in low energy efficiency and high operating costs.
Independent heat recovery coils are installed in the three heat source zones of main washing, rinsing and drying to achieve staged recovery of waste heat. Heat is absorbed and transferred through SUS304 stainless steel corrugated coils.
It significantly reduces heating energy consumption, improves heat recovery efficiency, reduces the energy required for subsequent heating, and enhances energy utilization.
Smart Images

Figure CN224925124U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure, belonging to the technical field of washing equipment. Background Technology
[0002] Dishwashers achieve cleaning by spraying water under high temperature and pressure to thoroughly rinse the surface of tableware, greatly improving work efficiency. The high temperature environment effectively kills bacteria, ensuring the cleanliness and hygiene of the tableware. Traditional dishwashers generate a large amount of low-to-medium temperature waste heat during the main wash, rinse, and dry stages. This heat is usually lost through the exhaust system without being utilized, resulting in low energy efficiency and high operating costs. Existing dishwashers with heat recovery devices mostly use a single recovery path, failing to stage the recovery of waste heat from different temperature ranges, resulting in limited heat recovery efficiency and insignificant energy-saving effects. Utility Model Content
[0003] The purpose of this invention is to provide a dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure. By setting independent heat recovery coils in the three heat source zones of main washing, rinsing, and drying, waste heat can be graded and efficiently recovered, significantly reducing heating energy consumption.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure includes a support frame on which a material conveying device, a main washing chamber, a rinsing chamber, and a drying chamber are mounted. The material conveying device passes sequentially through the main washing chamber, the rinsing chamber, and the drying chamber. The main washing chamber contains a dual-cylinder main washing spray device and a main washing coil, with the main washing coil positioned above the dual-cylinder main washing spray device. The rinsing chamber contains a dual-cylinder rinsing spray device and a rinsing coil, with the rinsing coil positioned above the dual-cylinder rinsing spray device. The drying chamber contains dual drying devices and drying coils, with the drying coils positioned above and to the side of the dual drying devices. Both the dual-cylinder main washing spray device and the dual-cylinder rinsing spray device are connected to the outlet of the dishwasher's water supply heating tank. The main washing coil, the rinsing coil, and the drying coil are connected in series to the inlet of the water supply heating tank.
[0006] In the aforementioned dual-cylinder dual-spray dual-dryer dishwasher with a multi-stage heat recovery structure, the dual-cylinder main wash spray device includes a first main wash spray device and a second main wash spray device. The first main wash spray device is located above the second main wash spray device, and both the first main wash spray device and the second main wash spray device face the material conveying device.
[0007] In the aforementioned dual-cylinder dual-spray dual-dryer dishwasher with a multi-stage heat recovery structure, the dual-cylinder rinsing spray device includes a first rinsing spray device and a second rinsing spray device. The first rinsing spray device is located above the second rinsing spray device, and both the first rinsing spray device and the second rinsing spray device face the material conveying device.
[0008] In the aforementioned dual-cylinder dual-spray dual-drying dishwasher with a multi-stage heat recovery structure, the dual drying device includes a first drying device and a second drying device, with the second drying device located downstream of the first drying device; the drying coil includes a first drying coil and a second drying coil, with the first drying coil arranged horizontally and located above the material conveying device; the second drying coil is arranged vertically and located on the side of the material conveying device.
[0009] In the aforementioned dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure, the main wash coil, the rinsing coil, and the drying coil are all made of SUS304 stainless steel corrugated tubing. The main wash coil is 20 meters long, the rinsing coil is 15 meters long, and the drying coil is 35 meters long.
[0010] Compared with existing technologies, this invention achieves graded and efficient recovery of waste heat by setting independent heat recovery coils in the three heat source zones of main washing, rinsing and drying, thus significantly reducing heating energy consumption. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;
[0012] Figure 2 This is a schematic diagram of the internal structure of one embodiment of the present invention;
[0013] Figure 3 yes Figure 2 A magnified view of a portion of the image;
[0014] Figure 4 This is a flowchart of the dishwasher heat recovery system.
[0015] Reference numerals: 1-Support frame, 2-Material conveying device, 3-Main washing chamber, 4-Rinsing chamber, 5-Drying chamber, 6-Double-cylinder main washing spray device, 7-Double-cylinder rinsing spray device, 8-Double drying device, 9-Second main washing spray device, 10-First main washing spray device, 11-Main washing coil, 12-Second rinsing spray device, 13-Rinsing coil, 14-First rinsing spray device, 15-First drying coil, 16-First drying device, 17-Second drying coil, 18-Second drying device.
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation
[0017] Embodiment 1 of this utility model: A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure includes a support frame 1. A material conveying device 2, a main washing chamber 3, a rinsing chamber 4, and a drying chamber 5 are installed on the support frame 1. The material conveying device 2 passes sequentially through the main washing chamber 3, the rinsing chamber 4, and the drying chamber 5. A dual-cylinder main washing spray device 6 and a main washing coil 11 are installed inside the main washing chamber 3, with the main washing coil 11 located above the dual-cylinder main washing spray device 6. A dual-cylinder rinsing spray device 7 and a rinsing coil 13 are installed inside the rinsing chamber 4, with the rinsing coil 13 located above the dual-cylinder rinsing spray device 7. A dual drying device 8 and a drying coil are installed inside the drying chamber 5, with the drying coil located above and to the side of the dual drying device 8. Both the dual-cylinder main washing spray device 6 and the dual-cylinder rinsing spray device 7 are connected to the outlet of the dishwasher's water supply heating tank. The main washing coil 11, the rinsing coil 13, and the drying coil are connected in series to the inlet of the water supply heating tank.
[0018] Example 2: A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure includes a support frame 1. A material conveying device 2, a main washing chamber 3, a rinsing chamber 4, and a drying chamber 5 are mounted on the support frame 1. The material conveying device 2 passes sequentially through the main washing chamber 3, the rinsing chamber 4, and the drying chamber 5. The main washing chamber 3 is equipped with a dual-cylinder main washing spray device 6 and a main washing coil 11, with the main washing coil 11 positioned above the dual-cylinder main washing spray device 6. The rinsing chamber 4 is equipped with a dual-cylinder rinsing spray device 7 and a rinsing coil 13, with the rinsing coil 13 positioned above the dual-cylinder rinsing spray device 7. The drying chamber 5 is equipped with a dual drying device 8 and a drying coil, with the drying coil positioned above and to the side of the dual drying device 8. Both the dual-cylinder main washing spray device 6 and the dual-cylinder rinsing spray device 7 are connected to the outlet of the dishwasher's water supply heating tank. The main washing coil 11, the rinsing coil 13, and the drying coil are connected in series to the inlet of the water supply heating tank.
[0019] The dual-cylinder main wash spray device 6 includes a first main wash spray device 10 and a second main wash spray device 9. The first main wash spray device 10 is located above the second main wash spray device 9, and both the first main wash spray device 10 and the second main wash spray device 9 face the material conveying device 2. The dual-cylinder rinsing spray device 7 includes a first rinsing spray device 14 and a second rinsing spray device 12. The first rinsing spray device 14 is located above the second rinsing spray device 12, and both the first rinsing spray device 14 and the second rinsing spray device 12 face the material conveying device 2.
[0020] Example 3: A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure includes a support frame 1. A material conveying device 2, a main washing chamber 3, a rinsing chamber 4, and a drying chamber 5 are mounted on the support frame 1. The material conveying device 2 passes sequentially through the main washing chamber 3, the rinsing chamber 4, and the drying chamber 5. The main washing chamber 3 is equipped with a dual-cylinder main washing spray device 6 and a main washing coil 11, with the main washing coil 11 positioned above the dual-cylinder main washing spray device 6. The rinsing chamber 4 is equipped with a dual-cylinder rinsing spray device 7 and a rinsing coil 13, with the rinsing coil 13 positioned above the dual-cylinder rinsing spray device 7. The drying chamber 5 is equipped with a dual drying device 8 and a drying coil, with the drying coil positioned above and to the side of the dual drying device 8. Both the dual-cylinder main washing spray device 6 and the dual-cylinder rinsing spray device 7 are connected to the outlet of the dishwasher's water supply heating tank. The main washing coil 11, the rinsing coil 13, and the drying coil are connected in series to the inlet of the water supply heating tank.
[0021] The dual-cylinder main wash spray device 6 includes a first main wash spray device 10 and a second main wash spray device 9. The first main wash spray device 10 is located above the second main wash spray device 9, and both the first main wash spray device 10 and the second main wash spray device 9 face the material conveying device 2. The dual-cylinder rinsing spray device 7 includes a first rinsing spray device 14 and a second rinsing spray device 12. The first rinsing spray device 14 is located above the second rinsing spray device 12, and both the first rinsing spray device 14 and the second rinsing spray device 12 face the material conveying device 2.
[0022] The dual drying unit 8 includes a first drying unit 16 and a second drying unit 18, with the second drying unit 18 located downstream of the first drying unit 16. The drying coils include a first drying coil 15 and a second drying coil 17. The first drying coil 15 is horizontally positioned above the material conveying device 2; the second drying coil 17 is vertically positioned to the side of the material conveying device 2. The main washing coil 11, rinsing coil 13, and drying coil are all made of SUS304 stainless steel corrugated tubing. The main washing coil 11 is 20 meters long, the rinsing coil 13 is 15 meters long, and the drying coil is 35 meters long.
[0023] The working principle of one embodiment of this utility model is as follows: Figure 4As shown, tap water enters the system through the inlet and first flows through the main wash coil 11, located above the main wash tank, absorbing approximately 65°C of waste heat from the main wash, raising the water temperature by about 5°C. Next, the water flows into the rinsing coil 13, located above the rinsing tank, absorbing approximately 65°C of waste heat from the rinsing, further raising the water temperature by about 10°C. Then, the water flows into the drying coil, located in the high-temperature area of the drying unit (top and sides), absorbing approximately 120°C of waste heat from the drying, raising the water temperature by about 15°C. After three stages of preheating, the tap water's cumulative temperature rise can reach approximately 30°C, significantly reducing the energy required for subsequent heating. The preheated water enters the water supply heating tank, where it is further heated to the set temperature according to actual cleaning needs, and finally used in the rinsing process through the spray system. The water supply heating tank uses a three-core variable frequency heating tank, capable of heating the water to different temperatures before supplying it to the main wash chamber 3 and the rinsing chamber 4.
Claims
1. A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure, characterized in that, Includes a support frame (1), on which a material conveying device (2), a main washing chamber (3), a rinsing chamber (4) and a drying chamber (5) are installed. The material conveying device (2) passes through the main washing chamber (3), the rinsing chamber (4) and the drying chamber (5) in sequence. The main washing chamber (3) is equipped with a dual-cylinder main washing spray device (6) and a main washing coil (11), with the main washing coil (11) located above the dual-cylinder main washing spray device (6); The rinsing chamber (4) is equipped with a double-cylinder rinsing spray device (7) and a rinsing coil (13), with the rinsing coil (13) located above the double-cylinder rinsing spray device (7). The drying chamber (5) is equipped with a dual drying device (8) and a drying coil, with the drying coil located above and to the side of the dual drying device (8); The dual-cylinder main wash spray device (6) and the dual-cylinder rinse spray device (7) are both connected to the water outlet of the water supply heating tank of the dishwasher. The main wash coil (11), the rinse coil (13) and the drying coil are connected in series to the water inlet of the water supply heating tank.
2. A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure according to claim 1, characterized in that, The dual-cylinder main wash spray device (6) includes a first main wash spray device (10) and a second main wash spray device (9). The first main wash spray device (10) is located above the second main wash spray device (9). Both the first main wash spray device (10) and the second main wash spray device (9) face the material conveying device (2).
3. A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure according to claim 1, characterized in that, The dual-cylinder rinsing spray device (7) includes a first rinsing spray device (14) and a second rinsing spray device (12). The first rinsing spray device (14) is located above the second rinsing spray device (12). Both the first rinsing spray device (14) and the second rinsing spray device (12) face the material conveying device (2).
4. A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure according to claim 1, characterized in that, The dual drying device (8) includes a first drying device (16) and a second drying device (18), with the second drying device (18) located downstream of the first drying device (16); the drying coil includes a first drying coil (15) and a second drying coil (17), with the first drying coil (15) set horizontally and located above the material conveying device (2); the second drying coil (17) is set vertically and located on the side of the material conveying device (2).
5. A dual-cylinder, dual-spray, dual-drying dishwasher with a multi-stage heat recovery structure according to any one of claims 1 to 4, characterized in that, The main washing coil (11), rinsing coil (13) and drying coil are all SUS304 stainless steel corrugated coils. The main washing coil (11) is 20 meters long, the rinsing coil (13) is 15 meters long, and the drying coil is 35 meters long.
