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CN-224220098-U - Waste water heat recovery device and energy-saving dish washer

CN224220098UCN 224220098 UCN224220098 UCN 224220098UCN-224220098-U

Abstract

The utility model provides a waste water heat recovery device and an energy-saving dish washer, comprising a waste water tank, heat exchange tubes and a plurality of fins which are arranged at intervals along the length direction of the waste water tank, wherein the fins are used for dividing the waste water tank into a plurality of chambers and are communicated with each other, the heat exchange tubes are of coil structures, each fin is provided with a connecting hole for the heat exchange tube to pass through, one side wall of the waste water tank in the length direction is provided with a waste water inlet communicated with an inner cavity of the waste water tank and a clear water inlet connected with one end of the heat exchange tube, and the other side wall of the waste water tank is provided with a waste water outlet communicated with the inner cavity of the waste water tank and a clear water outlet connected with the other end of the heat exchange tube. According to the waste water heat recovery device and the energy-saving dish washer, waste heat of the waste hot water is recovered to exchange heat with clear water, so that the clear water is preheated before entering the heating bag, the heating time of the heating bag is shortened, and the energy consumption is saved.

Inventors

  • FENG YU
  • XU LI

Assignees

  • 宁波超胜商用厨房设备有限公司

Dates

Publication Date
20260512
Application Date
20250523

Claims (9)

  1. 1. A waste water heat recovery device is characterized by comprising a waste water tank (1), heat exchange tubes (2) and a plurality of fins (3) which are arranged at intervals along the length direction of the waste water tank (1), wherein the fins (3) are used for separating the waste water tank (1) into a plurality of chambers and are communicated with each other, the heat exchange tubes (2) are of coil structures, connecting holes for the heat exchange tubes (2) to pass through are formed in the fins (3), a waste water inlet (4) communicated with an inner cavity of the waste water tank (1) and a clear water inlet (5) connected with one end of the heat exchange tubes (2) are formed in one side wall of the length direction of the waste water tank (1), and a waste water outlet (6) communicated with the inner cavity of the waste water tank and a clear water outlet (7) connected with the other end of the heat exchange tubes (2) are formed in the other side wall of the waste water tank (1).
  2. 2. The wastewater heat recovery device according to claim 1, wherein the wastewater tank (1) comprises a tank body with an opening at the upper part, a plurality of mutually symmetrical inserting grooves which extend vertically are formed in the inner walls of two side plates in the width direction of the tank body, a plurality of fins (3) are respectively inserted and assembled in the corresponding inserting grooves, the top of the tank body is connected with a top plate, and the upper end and the lower end of each fin (3) are respectively abutted against the top plate and the bottom of the tank body.
  3. 3. The waste water heat recovery device according to claim 1 or 2, wherein water passing through holes (8) which are staggered up and down are sequentially formed in every two adjacent fins (3), and a plurality of grooves and/or raised edges are formed on the surface of each fin (3).
  4. 4. The wastewater heat recovery device according to claim 1 or 2, wherein the heat exchange tube (2) is one of a spiral coil, a serpentine coil or a coil with a shape of a circle, and the heat exchange tube (2) is formed by bending a metal corrugated tube.
  5. 5. The energy-saving dish washer is characterized by comprising a frame (9), wherein a mounting frame (10) is arranged at the rear end of the top of the frame (9), a cover body capable of moving up and down is connected to the front side of the mounting frame (10), a cleaning cavity is formed by surrounding the cover body, the mounting frame (10) and the upper end of the frame (9), a main washing tank (11) is arranged at the upper end of the frame (9), a lower spray arm (12) is arranged in the main washing tank (11), an upper spray arm (13) is arranged on the mounting frame (10), a main water inlet pipe with a charged valve, a heating assembly, a water pump (14) and the waste water heat recovery device according to any one of claims 1 to 4 are further arranged at the lower end of the frame (9), one end of the main water inlet pipe is sequentially connected to the upper spray arm (13) and the lower spray arm (12) after passing through the heat exchange pipe (2), the heating assembly and the water pump (14), an overflow port communicated to the waste water inlet (4) is arranged on the side wall of the main washing tank (11), and the waste water outlet (6) is connected to the outside.
  6. 6. The energy-saving dish washer according to claim 5, wherein the heating assembly comprises a barrel and a PTC heating pipe (15), the barrel is sequentially divided into a water inlet cavity (16), a mixing cavity (17) and a water outlet cavity (18) along the length direction of the barrel, a water inlet pipe (19) communicated with the water inlet cavity (16) and a water outlet pipe (20) communicated with the water outlet cavity (18) are arranged on the side wall of the barrel, a water passing channel is arranged between adjacent cavities in the water inlet cavity (16), the mixing cavity (17) and the water outlet cavity (18), the PTC heating pipe (15) is detachably connected with the barrel and axially extends to the water inlet cavity (16), the mixing cavity (17) and the water outlet cavity (18), a first detection element (22) and a second detection element (23) for respectively detecting the water temperature of the water inlet cavity (16), the water outlet cavity (18) are further connected on the side wall of the barrel, when the water temperature of the water inlet cavity (16) is lower than a first set value, the PTC heating pipe (15) starts to heat when the water temperature of the water inlet cavity (16) is higher than the second set value, and the PTC heating pipe (18) stops heating pipe (15) when the water temperature is higher than the second set value.
  7. 7. The energy-saving dish washer according to claim 6, wherein two partition plates (24) are connected to the inner cavity wall of the cylinder body at intervals along the length direction of the inner cavity wall, the inner cavity of the cylinder body is divided into a water inlet cavity (16), a mixing cavity (17) and a water outlet cavity (18), first mounting holes for the PTC heating pipes (15) to pass through are formed in the middle of each partition plate (24), and a plurality of communication holes (21) are further formed in each partition plate (24) to form the water passing channel.
  8. 8. The energy-saving dish washer according to claim 6, wherein the cylinder comprises a hollow circular tube (25), two ends of the circular tube (25) are respectively connected with end cover plates (26), a second mounting hole for the PTC heating tube (15) to pass through is formed in any one of the end cover plates (26), one end of the PTC heating tube (15) is connected with a connecting flange (27), and the connecting flange (27) is detachably connected with the end cover plates (26) provided with the second mounting holes.
  9. 9. The energy-saving dish washing machine according to claim 6, wherein the first detection element (22) and the second detection element (23) are temperature sensing probes, and the detection ends of the two temperature sensing probes respectively extend to the water inlet cavity (16) and the water outlet cavity (18) through the side wall of the cylinder.

Description

Waste water heat recovery device and energy-saving dish washer Technical Field The utility model relates to the technical field of commercial dish washers, in particular to a waste water heat recovery device and an energy-saving dish washer. Background The commercial dish washer is a novel kitchen tableware cleaning device, and is mainly applied to kitchens with large tableware cleaning amount, such as schools, hotels, enterprises, troops, tableware disinfection companies and the like. Compared with manual cleaning, the commercial dish washing machine has the advantages of high cleaning efficiency, reduced labor cost, solving the problem of insufficient tableware supply and the like. The commercial dish-washing machine mainly comprises a under-table dish-washing machine, a cover-uncovering dish-washing machine, a channel dish-washing machine and a long-dragon dish-washing machine. Wherein the workflow of the uncovered dishwasher mainly comprises a main washing and rinsing process. The main washing process is that the main washing pump pumps water in the main washing tank, the water is directly sprayed on the surface of the tableware through the washing arm, food residues and greases on the tableware are washed, and the main washing water after passing through the tableware is fallen back into the main washing tank again, so that the purpose of recycling is achieved. And in the rinsing process, tap water enters a dish washer heating bag and is heated by a high-power heating pipe, so that the water temperature is quickly higher than 80 ℃, high-temperature water in the heating bag is extruded by water inlet and sprayed on the surface of tableware through a rinsing spray arm, and finally the high-temperature water falls into a main water washing tank. The existing uncovering type dish washing machine is used for directly introducing external clear water for rinsing into a heating bag for heating, and then spraying tableware through a spray arm, so that the clear water needs longer time from normal temperature to above 80 ℃ and the energy consumption is high. And the hot water overflowed part in the main water washing tank is directly discharged to a sewer pipe, so that waste heat cannot be fully utilized, and resource waste is caused. Disclosure of utility model In order to overcome at least one defect in the prior art, the utility model provides the waste water heat recovery device and the energy-saving dish washer, and the waste water heat recovery device and the energy-saving dish washer are used for recovering waste heat of waste water and exchanging heat with clean water, so that the clean water is preheated before entering a heating bag, the heating time of the heating bag is shortened, and the energy consumption is saved. The technical scheme includes that the waste water heat recovery device comprises a waste water tank, heat exchange tubes and a plurality of fins which are arranged at intervals along the length direction of the waste water tank, wherein the fins are used for dividing the waste water tank into a plurality of chambers and are communicated with each other, the heat exchange tubes are of a coil structure, each fin is provided with a connecting hole for the heat exchange tubes to pass through, one side wall of the length direction of the waste water tank is provided with a waste water inlet communicated with an inner cavity of the waste water tank and a clear water inlet connected with one end of the heat exchange tubes, and the other side wall of the waste water tank is provided with a waste water outlet communicated with the inner cavity of the waste water tank and a clear water outlet connected with the other end of the heat exchange tubes. Further, the waste water tank comprises a tank body with an opening at the upper part, a plurality of mutually symmetrical inserting grooves which extend vertically are formed in the inner walls of the two side plates in the width direction of the tank body, a plurality of fins are respectively inserted and assembled in the corresponding inserting grooves, the top of the tank body is connected with a top plate, and the upper end and the lower end of each fin are respectively abutted to the top plate and the bottom of the tank body. As an improvement, water passing through holes staggered up and down are sequentially formed in every two adjacent fins, and a plurality of grooves and/or raised edges are formed in the surface of each fin. And in addition, the heat exchange tube is one of a spiral coil, a serpentine coil or a return coil, and is formed by bending a metal corrugated tube. The energy-saving dish washer comprises a frame, wherein a mounting frame is arranged at the rear end of the top of the frame, a cover body capable of moving up and down is connected to the front side of the mounting frame, a cleaning cavity is formed by surrounding the cover body, the mounting frame and the upper end of the frame, a main washing tank is arranged at the up