Dish washing machine with heat energy recovery function

Abstract

The utility model discloses a dish-washing machine with a heat energy recovery function. The dish-washing machine comprises a machine frame, a conveying device, a steam heat exchange assembly, a main washing assembly, a waste water tank, a coil pipe heat exchange assembly, a rinsing assembly, a drying assembly and a hot air guide cover. Cold water entering from the water inlet and high-temperature steam in the condensation cavity are subjected to heat exchange through the steam heat exchange assembly; a coil pipe heat exchange assembly is arranged in the waste water tank in a matched manner; cold water heated for the first time enters the coil pipe heat exchange assembly and exchanges heat with high-temperature waste water in the waste water tank again, high-temperature hot air generated during drying is guided into the condensation cavity through the hot air guide cover to be discharged after temperature neutralization, heat waste is avoided, and the temperature of discharged steam, waste water and hot air is reduced; in addition, the dish washing process can be met only by rapidly heating the preheated water reaching a certain temperature through the heating box, and the overall power of the dish washing machine is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of dishwashers, and in particular to a dishwasher with heat recovery function. 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 typically use high-temperature, high-pressure water jets for rinsing before drying. Therefore, the washing process generates not only high-temperature wastewater and steam, but also high-temperature hot air during drying. Current dishwashers discharge this wastewater, steam, and hot air directly, wasting heat and raising the ambient temperature. Furthermore, the cold water entering the dishwasher needs to be heated to the required temperature before washing, resulting in high overall power consumption. Therefore, further improvements to the existing dishwasher structure are necessary. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a dishwasher with heat recovery function, which can effectively solve the problems of heat waste, high external ambient temperature, and high power consumption of existing dishwashers.

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

[0006] A dishwasher with heat recovery function includes a frame, a conveying device, a steam heat exchange assembly, a main wash assembly, a wastewater tank, a coil heat exchange assembly, a rinsing assembly, a drying assembly, and a hot air guide hood. The frame has a mounting cavity with openings at both ends. Multiple condensing cavities, separated sequentially by partitions, are also provided on the frame, located above and communicating with the mounting cavity. The conveying device is mounted on the frame and located within the mounting cavity, with both ends extending outwards from the openings at both ends of the mounting cavity. Multiple steam heat exchange assemblies are provided, each located within a corresponding condensing cavity. The input ends of the multiple steam heat exchange assemblies extend outwards from the frame and form water inlets. The main wash assembly includes a main wash water tank and a first spray head, which are connected to each other. The main wash water tank is mounted on the frame. A spray head is installed in the mounting cavity and located directly above the conveying device; a wastewater tank is installed on the frame and connected to the output end of the main washing water tank, and a coil heat exchange assembly is installed in the wastewater tank, the input end of the coil heat exchange assembly being connected to the output end of the steam heat exchange assembly; the rinsing assembly includes a heated water tank and a second spray head connected in communication; the heated water tank is installed on the frame and connected to the output end of the coil heat exchange assembly; the second spray head is installed in the mounting cavity and located directly above the conveying device; a drying assembly is installed on the frame and located beside the output end of the conveying device, the output end of the drying assembly being connected to the mounting cavity; a hot air guide hood is installed on the frame, the two ends of the hot air guide hood being connected to the mounting cavity and the condensation cavity respectively, and the hot air guide hood being connected to the opening of the mounting cavity facing the output end of the conveying device.

[0007] As a preferred embodiment, the conveying device includes a conveyor frame, a conveyor belt, a first drive mechanism, and a material rack; the conveyor frame is mounted on the machine frame and located in the mounting cavity, and the conveyor belt is mounted on the conveyor frame for reciprocating transmission; the first drive mechanism is mounted on the machine frame and drives the conveyor belt; the material rack is mounted on the conveyor belt and is driven back and forth by the conveyor belt.

[0008] As a preferred embodiment, an exhaust fan is provided at the upper opening of the condensation chamber, and a condensate pan is provided at the bottom of the condensation chamber.

[0009] As a preferred embodiment, a steam guide hood communicating with the condensation chamber is provided at the opening of the mounting cavity near the input end of the conveying device, and a steam heat exchange component is also provided in the steam guide hood.

[0010] As a preferred embodiment, the wastewater tank and the main washing water tank are connected by a pipe. The pipe is located near the upper end of the main washing water tank, and a filter screen is installed at the opening of the end of the pipe that connects to the main washing water tank.

[0011] As a preferred embodiment, the wastewater tank is provided with a drain pipe extending vertically, the upper end of the drain pipe extending into the wastewater tank and located at the upper end of the wastewater tank, and the lower end of the drain pipe extending outward from the wastewater tank.

[0012] As a preferred embodiment, the heating water tank is equipped with a heating pipe, the outer wall of the heating water tank is covered with insulation cotton, and the output end of the heating water tank is connected to the second spray head through a high-temperature water pump.

[0013] As a preferred embodiment, the drying assembly includes a second drive mechanism, a heating box, and a blower device; the second drive mechanism is mounted on the frame, the heating box is mounted on the frame and located beside the output end of the second drive mechanism; the blower device is mounted on the frame and located between the second drive mechanism and the heating box, and the output end of the blower device extends inward into the mounting cavity.

[0014] As a preferred embodiment, the bellows device includes an air supply component and an air outlet component that are interconnected; the air supply component is connected to the output end of the second drive mechanism and the output end of the heating box, respectively, and the air outlet component surrounds the outer periphery of the conveying device, and the air outlet component has multiple air outlets facing the four sides of the conveying device.

[0015] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0016] Multiple steam heat exchange components are configured, each located within a corresponding condenser chamber. The input ends of these components extend outwards from the frame, forming water inlets. This allows cold water entering through the inlets to exchange heat with the high-temperature steam in the condenser chambers, neutralizing the temperature of the discharged steam and providing initial heating to the incoming cold water. A coil heat exchange component is also installed in the wastewater tank, its input end connected to the output end of the steam heat exchange components. This allows the initially heated cold water to enter the coil. In the heat exchange component, heat is exchanged again with the high-temperature wastewater in the wastewater tank to further heat the warm water. Then, the preheated cold water is sent to the heating water tank for further heating. The hot air guide hood connects the installation chamber and the condensation chamber at both ends, respectively, and guides the high-temperature hot air generated during drying into the condensation chamber for temperature neutralization before being discharged. This not only avoids heat waste and reduces the temperature of the discharged steam, wastewater, and hot air, but also ensures that the heating box only needs to quickly heat the preheated water to a certain temperature to meet the dishwashing process, effectively reducing the overall power consumption of the dishwasher.

[0017] 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

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

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

[0020] 10. Frame 101. Mounting cavity

[0021] 102. Condensation chamber; 11. Partition plate

[0022] 12. Exhaust fan 13. Condensate pan

[0023] 14. Steam guide hood; 20. Conveying device

[0024] 21. Conveyor frame 22. Conveyor belt

[0025] 23. First drive mechanism 24. Material rack

[0026] 30. Steam heat exchange assembly; 31. Water inlet

[0027] 40. Main wash assembly 41. Main wash water tank

[0028] 42. First spray head; 50. Wastewater tank

[0029] 51. Coil heat exchange assembly 52. Piping

[0030] 53. Drain pipe 54. Filter screen

[0031] 60. Rinsing assembly; 61. Heating water tank

[0032] 62. Second spray head; 63. Heating tube

[0033] 64. Thermal insulation cotton; 65. High-temperature water pump

[0034] 70. Drying assembly 701. Air outlet

[0035] 71. Second drive mechanism; 72. Heating box

[0036] 73. Bellows assembly; 731. Air supply assembly

[0037] 732. Air outlet assembly 80. Hot air deflector. Detailed Implementation

[0038] Please refer to Figure 1 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a frame 10, a conveying device 20, a steam heat exchange assembly 30, a main washing assembly 40, a wastewater tank 50, a coil heat exchange assembly 60, a rinsing assembly 70, a drying assembly 80, and a hot air guide hood 90.

[0039] The frame 10 has a mounting cavity 101 with openings at both ends. The frame 10 also has multiple condensing cavities 102, separated by partitions 11. These condensing cavities 102 are located above and communicate with the mounting cavity 101. High-temperature steam generated in the mounting cavity 101 during the washing process rises into the condensing cavities 102. In this embodiment, an exhaust fan 12 is installed at the upper opening of each condensing cavity 102 to discharge the neutralized steam. Two exhaust fans 12 are arranged horizontally at intervals. A condensate tray 13 is installed at the bottom of each condensing cavity 102 to collect condensate generated during heat exchange, preventing condensate from entering the dishwasher's internal structure. A steam guide hood 14 communicating with the condensation chamber 102 is provided at the opening of the mounting cavity 101 near the input end of the conveying device 20. A steam heat exchange component 30 is also provided in the steam guide hood 14. Multiple steam heat exchange components 30 are provided to ensure the thoroughness of the high-temperature steam heat exchange process.

[0040] The conveying device 20 is mounted on the frame 10 and located in the mounting cavity 101. Both ends of the conveying device 20 extend outward from the openings at both ends of the mounting cavity 101. In this embodiment, the conveying device 20 includes a conveying frame 21, a conveyor belt 22, a first drive mechanism 23, and a material rack 24. The conveying frame 21 is mounted on the frame 10 and located in the mounting cavity 101. The conveyor belt 22 is mounted on the conveying frame 21 and can be driven back and forth. The first drive mechanism 23 is mounted on the frame 10 and drives the conveyor belt 22. The material rack 24 is mounted on the conveyor belt 22 and is driven back and forth by the conveyor belt 22. The material rack 24 is used to position the bowls.

[0041] The steam heat exchange assembly 30 is configured in multiple ways, with each steam heat exchange assembly 30 located in a corresponding condensing chamber 102. The input ends of the multiple steam heat exchange assemblies 30 extend outward from the frame 10 and form water inlets 31. After the external cold water enters the steam heat exchange assembly 30, it exchanges heat with the high-temperature steam in the condensing chamber 102, which not only neutralizes the temperature of the high-temperature steam but also preheats the cold water, thus avoiding heat waste.

[0042] The main wash assembly 40 includes a main wash water tank 41 and a first spray head 42 connected together; the main wash water tank 41 is mounted on the frame 10; the first spray head 42 is mounted in the mounting cavity 101 and located directly above the conveying device 20.

[0043] The wastewater tank 50 is mounted on the frame 10 and connected to the output end of the main wash water tank 41. A coil heat exchange assembly 51 is installed in the wastewater tank 50. The input end of the coil heat exchange assembly 51 is connected to the output end of the steam heat exchange assembly 30, allowing preheated warm water from the steam heat exchange assembly 30 to enter the coil heat exchange assembly 51. The coil heat exchange assembly 51 facilitates heat exchange between the high-temperature wastewater in the wastewater tank 50 and the preheated warm water from the steam heat exchange assembly 30, reducing the wastewater temperature and further increasing the temperature of the preheated warm water. In this embodiment, the wastewater tank 50 and the main wash water tank 41 are connected by a pipe 52. The pipe 52 is located near the upper end of the main wash water tank 41, and a filter screen 54 is installed at the opening of the pipe 52 connected to the main wash water tank 41. The filter screen is used to filter impurities within the main wash water tank 41. The wastewater tank 50 is provided with a drain pipe 53 extending vertically. The upper end of the drain pipe 53 extends into the wastewater tank 50 and is located at the upper end of the wastewater tank 50. The lower end of the drain pipe 53 extends outward from the wastewater tank 50. Through the vertically extending drain pipe 53, excess wastewater in the wastewater tank 50 and the dirt floating on the upper part of the wastewater flow outward from the upper end of the drain pipe 53.

[0044] The rinsing assembly 60 includes a heated water tank 61 and a second spray head 62 connected in communication. The heated water tank 61 is mounted on the frame 10 and connected to the output end of the coil heat exchange assembly 51. The second spray head 62 is located in the mounting cavity 101 and directly above the conveying device 20. This allows the warm water, after being heated a second time by the coil heat exchange assembly 51, to be sent into the heated water tank 61, and the temperature of the warm water is quickly raised to the temperature required for washing dishes by the heating of the heated water tank 61. This effectively reduces the heating power and heating time of the heated water tank 61. In this embodiment, a heating tube 63 is installed inside the heated water tank 61, and the outer wall of the heated water tank 61 is covered with insulation cotton 64. The output end of the heated water tank 61 is connected to the second spray head 62 through a high-temperature water pump 65.

[0045] The drying assembly 70 is mounted on the frame 10 and located beside the output end of the conveying device 20. The output end of the drying assembly 70 communicates with the mounting cavity 101. The drying assembly 70 is used to dry the washed dishes with hot air. In this embodiment, the drying assembly 70 includes a second drive mechanism 71, a heating box 72, and a bellows device 73. The second drive mechanism 71 is mounted on the frame 10, and the heating box 72 is mounted on the frame 10 and located beside the output end of the second drive mechanism 71. The bellows device 73 is mounted on the frame 10 and located between the second drive mechanism 71 and the heating box 72. The output end of the bellows device 73 extends inward into the mounting cavity 101. The second drive mechanism 71 is used to send the high-temperature gas generated by the heating box 72 into the mounting cavity 101 through the bellows device 73, thereby completing the drying process of the dishes. Furthermore, the bellows device 73 includes an air supply component 731 and an air outlet component 732 that are interconnected. The air supply component 731 is connected to the output end of the second drive mechanism 71 and the output end of the heating box 72, respectively. The air outlet component 732 surrounds the outer periphery of the conveying device 20 and has multiple air outlets 701 facing the four sides of the conveying device 20, so that the bowls can be dried by blowing air from the top, bottom, left and right sides at the same time, which greatly improves the drying efficiency.

[0046] The hot air guide hood 80 is mounted on the frame 10. The two ends of the hot air guide hood 80 are respectively connected to the mounting cavity 101 and the condensing cavity 102. The hot air guide hood 80 is connected to the opening of the mounting cavity 101 facing the output end of the conveying device 20. The hot air guide hood 80 is used to guide the high-temperature hot air generated by the drying component 70 during the drying process into the condensing cavity 102, and then neutralize and cool it through the steam heat exchange component 30 in the condensing cavity 102 before discharging it outward.

[0047] The key design feature of this invention is as follows: Multiple steam heat exchange components are configured, each housed within a corresponding condensation chamber. The input ends of these components extend outwards from the frame, forming water inlets. This allows cold water entering through the inlets to exchange heat with the high-temperature steam in the condensation chambers, thereby neutralizing the temperature of the discharged steam and providing initial heating to the incoming cold water. Furthermore, a coil heat exchange component is integrated into the wastewater tank, with its input end connected to the output end of the steam heat exchange component. This initial heating process... Cold water enters the coil heat exchange assembly and exchanges heat again with the high-temperature wastewater in the wastewater tank, further heating the warm water. Then, the preheated cold water is sent to the heating water tank for heating. The hot air guide hood connects the installation chamber and the condenser chamber at both ends, guiding the high-temperature hot air generated during drying into the condenser chamber for temperature neutralization before being discharged. This not only avoids heat waste and reduces the temperature of the discharged steam, wastewater, and hot air, but also ensures that the heating chamber only needs to quickly heat the preheated water to a certain temperature to meet the dishwashing process, effectively reducing the overall power consumption of the dishwasher.

[0048] 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 heat recovery function, characterized in that: The system includes a frame, a conveying device, a steam heat exchange assembly, a main wash assembly, a wastewater tank, a coil heat exchange assembly, a rinsing assembly, a drying assembly, and a hot air guide hood. The frame has an installation cavity with openings at both ends. Multiple condensing chambers, separated sequentially by partitions, are also mounted on the frame and communicate with the installation cavity. The conveying device is mounted on the frame and located within the installation cavity, with both ends extending outwards from the openings at both ends of the installation cavity. Multiple steam heat exchange assemblies are configured, each located within a corresponding condensing chamber. The input ends of the multiple steam heat exchange assemblies extend outwards from the frame and form water inlets. The main wash assembly includes a main wash water tank and a first spray head, which are connected to each other. The main wash water tank is mounted on the frame. The first spray head is located within the installation cavity. The assembly is located in the mounting cavity and directly above the conveying device; the wastewater tank is mounted on the frame and connected to the output end of the main washing water tank, and a coil heat exchange assembly is installed in the wastewater tank, with the input end of the coil heat exchange assembly connected to the output end of the steam heat exchange assembly; the rinsing assembly includes a heated water tank and a second spray head connected in communication; the heated water tank is mounted on the frame and connected to the output end of the coil heat exchange assembly; the second spray head is located in the mounting cavity and directly above the conveying device; the drying assembly is mounted on the frame and located beside the output end of the conveying device, with the output end of the drying assembly connected to the mounting cavity; the hot air guide hood is mounted on the frame, with both ends of the hot air guide hood connected to the mounting cavity and the condensation cavity respectively, and the hot air guide hood connected to the opening of the mounting cavity facing the output end of the conveying device.

2. The dishwasher with heat recovery function according to claim 1, characterized in that: The conveying device includes a conveyor frame, a conveyor belt, a first drive mechanism, and a material rack; the conveyor frame is mounted on the machine frame and located in the mounting cavity, and the conveyor belt is mounted on the conveyor frame for reciprocating transmission; the first drive mechanism is mounted on the machine frame and drives the conveyor belt; the material rack is mounted on the conveyor belt and is driven back and forth by the conveyor belt.

3. The dishwasher with heat recovery function according to claim 1, characterized in that: An exhaust fan is installed at the upper opening of the condensation chamber, and a condensate pan is installed at the bottom of the condensation chamber.

4. The dishwasher with heat recovery function according to claim 1, characterized in that: A steam guide hood communicating with the condensation chamber is provided at the opening of the installation cavity near the input end of the conveying device, and a steam heat exchange component is also provided in the steam guide hood.

5. The dishwasher with heat recovery function according to claim 1, characterized in that: The wastewater tank and the main washing water tank are connected by a pipe. The pipe is located near the upper end of the main washing water tank, and a filter screen is installed at the opening of the end of the pipe that connects to the main washing water tank.

6. The dishwasher with heat recovery function according to claim 1, characterized in that: The wastewater tank is equipped with a drain pipe extending vertically. The upper end of the drain pipe extends into the wastewater tank and is located at the top of the wastewater tank, while the lower end of the drain pipe extends outward from the wastewater tank.

7. The dishwasher with heat recovery function according to claim 1, characterized in that: The heating water tank is equipped with a heating pipe, and the outer wall of the heating water tank is covered with heat insulation cotton. The output end of the heating water tank is connected to the second spray head through a high-temperature water pump.

8. The dishwasher with heat recovery function according to claim 1, characterized in that: The drying assembly includes a second drive mechanism, a heating box, and a blower device; the second drive mechanism is mounted on the frame, the heating box is mounted on the frame and located next to the output end of the second drive mechanism; the blower device is mounted on the frame and located between the second drive mechanism and the heating box, and the output end of the blower device extends inward into the mounting cavity.

9. The dishwasher with heat recovery function according to claim 8, characterized in that: The bellows device includes an air supply component and an air outlet component that are interconnected; the air supply component is connected to the output end of the second drive mechanism and the output end of the heating box respectively, and the air outlet component surrounds the outer periphery of the conveying device, and the air outlet component has multiple air outlets facing the four sides of the conveying device.

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