Dish washing machine with waste water heat energy recovery device

Abstract

The utility model discloses a dish-washing machine with a waste water heat energy recovery device. The dish-washing machine is characterized by comprising a rack, a main washing water tank, a main leaf washing spraying arm, a rinsing spraying arm, a waste water tank, a first heat energy converter, a second heat energy converter and a high-temperature water tank, the first heat energy converter is attached to the outer side wall of the waste water tank, so that low-temperature water in the first heat energy converter is preheated through the temperature of the side wall of the waste water tank through the first heat energy converter, and the second heat energy converter is arranged in the waste water tank in a matched mode; cold water preheated in the second heat energy converter is further heated through high-temperature waste water in the waste water tank, the cold water enters the subsequent high-temperature water tank to be heated after having a certain temperature, the heating time of the high-temperature water tank is shortened, the heating power of the high-temperature water tank is reduced, and the high-temperature waste water in the waste water tank can be discharged after being cooled; the temperature of the external environment is prevented from rising due to high-temperature wastewater, and the working environment of an operator is better.

Description

Technical Field

[0001] This utility model relates to the field of dishwashers, and in particular to a dishwasher with a wastewater heat energy recovery device. Background Technology

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

[0003] Dishwashers require high-temperature water rinsing during the washing process to ensure effective cleaning. However, existing dishwashers discharge the high-temperature wastewater directly after rinsing, which not only wastes heat energy but also raises the external temperature, resulting in a harsh working environment for the operator. Therefore, it is necessary to further improve the structure of existing dishwashers. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a dishwasher with a wastewater heat energy recovery device, which can effectively solve the problems of existing dishwashers that easily cause heat energy waste, high external temperature, and affect the operator's working environment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dishwasher with a wastewater heat recovery device includes a frame, a main wash water tank, a main wash spray arm, a rinsing spray arm, a wastewater tank, a first heat exchanger, a second heat exchanger, and a high-temperature water tank. The frame has a work surface. The main wash water tank is mounted on the frame and located below the work surface. The main wash spray arm is mounted on the frame and located directly above the work surface, and is connected to the output end of the main wash water tank. The rinsing spray arm is mounted on the frame and located directly above the work surface. The wastewater tank is mounted on the frame and located below the work surface. The wastewater tank is used to collect high-temperature wastewater from the workbench; the first heat exchanger is attached to the outer wall of the wastewater tank, and the input end of the first heat exchanger is connected to the external water inlet; the second heat exchanger is installed in the wastewater tank, and the input end of the second heat exchanger is connected to the output end of the first heat exchanger; the high-temperature water tank is installed on the frame and located next to the wastewater tank, the input end of the high-temperature water tank is connected to the output end of the second heat exchanger, the output end of the high-temperature water tank is connected to the rinsing spray arm, and a heating element is installed inside the high-temperature water tank.

[0007] As a preferred option, the frame is equipped with a protective cover that can slide up and down, covering the outside of the worktable, the main washing spray arm, and the rinsing spray arm.

[0008] As a preferred option, there are two main washing blade spray arms arranged vertically, with the other main washing blade spray arm located below the worktable.

[0009] As a preferred option, there are two rinsing spray arms arranged vertically, with the other rinsing spray arm located below the worktable.

[0010] As a preferred option, the bottom of the wastewater tank is provided with a drain outlet that communicates with the outside.

[0011] As a preferred option, a high-temperature water pump is installed on the high-temperature water tank, which is used to send the high-temperature hot water in the high-temperature water tank into the rinsing spray arm.

[0012] As a preferred option, the outer wall of the high-temperature water tank is covered with an insulation layer.

[0013] As a preferred option, a controller is installed on the frame, and the main wash water tank, main wash blade spray arm, rinsing spray arm, wastewater tank, first heat energy converter, second heat energy converter, and high-temperature water tank are all connected to the controller.

[0014] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0015] The first heat exchanger is attached to the outer wall of the wastewater tank, allowing the low-temperature water inside to be preheated by the temperature of the wastewater tank's side wall. Simultaneously, it effectively cools the outside of the wastewater tank, thus reducing its external temperature. A second heat exchanger is installed inside the wastewater tank, with its input connected to the output of the first. The high-temperature wastewater inside the tank further heats the preheated water in the second heat exchanger, ensuring it reaches a certain temperature before entering the subsequent high-temperature water tank. This not only reduces the heating time and power of the high-temperature water tank but also cools the high-temperature wastewater before discharge, preventing it from raising the external temperature and improving the operator's working environment.

[0016] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1This is a front view of a preferred embodiment of the present invention;

[0018] Figure 2 This is a side view of a preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the attached diagram:

[0020] 10. Frame 11. Workbench

[0021] 12. Protective cover 13. Controller

[0022] 20. Main wash water tank; 30. Main wash blade spray arm

[0023] 40. Rinse spray arm; 50. Wastewater tank

[0024] 51. Drain outlet; 60. First heat exchanger

[0025] 61. Water inlet; 70. Second heat exchanger

[0026] 80. High-temperature water tank; 81. Heating element

[0027] 82. High-temperature water pump 83. Insulation layer. Detailed Implementation

[0028] Please refer to Figures 1 to 2 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a frame 10, a main wash water tank 20, a main wash blade spray arm 30, a rinsing spray arm 40, a wastewater tank 50, a first heat energy converter 60, a second heat energy converter 70, and a high-temperature water tank 80.

[0029] The frame 10 has a work surface 11; during cleaning, the toy to be cleaned is placed on the work surface 11. In this embodiment, the frame 10 is equipped with a protective cover 12 that can slide up and down. The frame 10 is equipped with a controller 13, and the main wash water tank 20, main wash spray arm 30, rinsing spray arm 40, wastewater tank 50, first heat energy converter 60, second heat energy converter 70, and high-temperature water tank 80 are all connected to the controller 13.

[0030] The main wash water tank 20 is mounted on the frame 10 and located below the workbench 11. The main wash water tank 20 also has a heating device to heat the water inside the main wash water tank.

[0031] The main washing spray arm 30 is mounted on the frame 10 and located directly above the workbench 11. The main washing spray arm 30 is connected to the output end of the main washing water tank 20, which uses an external water pump to supply water to the main washing spray arm 30. The main washing water tank 20 not only provides water to the main washing spray arm 30 but also collects the cleaning water left on the workbench 11 after washing. In this embodiment, two main washing spray arms 30 are arranged vertically, with the other main washing spray arm 30 located below the workbench 11, allowing it to complete the cleaning process simultaneously from both vertical and horizontal directions, ensuring effective cleaning.

[0032] The rinsing spray arm 40 is mounted on the frame 10 and located directly above the workbench 11. In this embodiment, the protective cover 12 covers the outside of the workbench 11, the main washing blade spray arm 30, and the rinsing spray arm 40. The protective cover 12 moves downward during cleaning to cover the workbench 11, the main washing blade spray arm 30, and the rinsing spray arm 40, preventing high temperatures and hot water splashing during cleaning, thus enhancing safety. After cleaning, the product loading and unloading process is carried out by sliding the protective cover upward. Two rinsing spray arms 40 are arranged vertically, with the other rinsing spray arm 40 located below the workbench 11, ensuring that the rinsing process can be completed from both vertical and horizontal directions, guaranteeing the cleaning effect.

[0033] The wastewater tank 50 is installed on the frame 10 and located below the workbench 11. The wastewater tank 50 is used to collect high-temperature wastewater on the workbench. In this embodiment, the bottom of the wastewater tank 50 is provided with a drain outlet 51 that communicates with the outside. The drain outlet 51 is used to discharge the wastewater that has undergone heat exchange in the wastewater tank 50.

[0034] The first heat exchanger 60 is attached to the outer wall of the wastewater tank 50. The input end of the first heat exchanger 60 is connected to the external water inlet 61. The specific structure of the first heat exchanger 60 is existing technology, so the specific structure of the first heat exchanger 60 will not be described in detail. The first heat exchanger 60 can not only preheat the cold water entering from the outside, but also cool the outer wall of the wastewater tank 50 to avoid the temperature around the wastewater tank 50 from being too high.

[0035] The second heat exchanger 70 is installed in the wastewater tank 50. The input end of the second heat exchanger 70 is connected to the output end of the first heat exchanger 60. The second heat exchanger 70 is used to further heat up the high-temperature wastewater flowing out of the first heat exchanger 60 through the wastewater tank 50. This not only increases the temperature of the water flowing into the subsequent high-temperature water tank 80, reducing the heating time and heating power in the high-temperature water tank 80, thus reducing the overall power of the dishwasher, but also recovers the heat energy from the high-temperature wastewater, effectively reducing the temperature of the discharged wastewater and avoiding waste of heat energy. It also prevents the discharged high-temperature wastewater from raising the temperature of the external environment, resulting in a better working environment for the operator.

[0036] The high-temperature water tank 80 is mounted on the frame 10 and located beside the wastewater tank 50. The input end of the high-temperature water tank 80 is connected to the output end of the second heat exchanger 70, and the output end is connected to the rinsing spray arm 40. A heating element 81 is installed inside the high-temperature water tank 80 to rapidly heat the preheated water flowing out of the second heat exchanger 70 to above 82-90°C, thereby completing the subsequent rinsing process. In this embodiment, a high-temperature water pump 82 is installed on the high-temperature water tank 80 to deliver the high-temperature hot water from the high-temperature water tank 80 into the rinsing spray arm 40. The outer wall of the high-temperature water tank 80 is covered with an insulation layer 83, which prevents heat loss from the inside of the high-temperature water tank 80 and also prevents heat dissipation that could cause an increase in external temperature.

[0037] The key design feature of this invention is as follows: A first heat exchanger is attached to the outer wall of the wastewater tank, allowing the temperature of the wastewater tank's side wall to preheat the low-temperature water within the first heat exchanger. Simultaneously, it effectively cools the exterior of the wastewater tank, thus reducing its external temperature. A second heat exchanger is integrated within the wastewater tank, with its input connected to the output of the first heat exchanger. The high-temperature wastewater inside the tank further heats the preheated water in the second heat exchanger, ensuring it reaches a certain temperature before entering the subsequent high-temperature water tank. This not only reduces the heating time and power of the high-temperature water tank but also cools the high-temperature wastewater before discharge, preventing it from raising the external temperature and improving the operator's working environment.

[0038] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A dishwasher with a wastewater heat recovery device, characterized in that: The system includes a frame, a main wash water tank, a main wash blade spray arm, a rinsing spray arm, a wastewater tank, a first heat exchanger, a second heat exchanger, and a high-temperature water tank. The frame has a worktable. The main wash water tank is mounted on the frame and located below the worktable. The main wash blade spray arm is mounted on the frame and located directly above the worktable, and is connected to the output end of the main wash water tank. The rinsing spray arm is mounted on the frame and located directly above the worktable. The wastewater tank is mounted on the frame and located below the worktable; the wastewater tank is used to collect wastewater during operation. High-temperature wastewater on the tabletop; the first heat exchanger is attached to the outer wall of the wastewater tank, and the input end of the first heat exchanger is connected to the external water inlet; the second heat exchanger is installed in the wastewater tank, and the input end of the second heat exchanger is connected to the output end of the first heat exchanger; the high-temperature water tank is installed on the frame and located next to the wastewater tank, the input end of the high-temperature water tank is connected to the output end of the second heat exchanger, the output end of the high-temperature water tank is connected to the rinsing spray arm, and a heating element is installed inside the high-temperature water tank.

2. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: The frame is equipped with a protective cover that can slide up and down, covering the outside of the worktable, the main washing spray arm, and the rinsing spray arm.

3. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: There are two main blade washing spray arms, one above the other, with the other main blade washing spray arm located below the worktable.

4. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: The rinsing spray arms are two, one above the other, with the other rinsing spray arm located below the worktable.

5. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: The bottom of the wastewater tank is equipped with a drain outlet that communicates with the outside.

6. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: A high-temperature water pump is installed on the high-temperature water tank, which is used to send the high-temperature hot water in the high-temperature water tank into the rinsing spray arm.

7. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: The outer wall of the high-temperature water tank is covered with an insulation layer.

8. The dishwasher with wastewater heat recovery device according to claim 1, characterized in that: A controller is installed on the frame, and the main wash water tank, main wash blade spray arm, rinsing spray arm, wastewater tank, first heat energy converter, second heat energy converter and high temperature water tank are all connected to the controller.

Images