Waste heat recycling device of heat pump dryer

Abstract

The utility model relates to the technical field of heat pump drying machines, and discloses a waste heat recycling device of a heat pump drying machine, which comprises a heat pump drying machine body and a waste heat recycling box, circulating pipes are embedded on the left side and the right side of the waste heat recycling box, an exhaust fan is arranged in one of the circulating pipes, and an exhaust fan is arranged in the other of the circulating pipes. And the circulating pipe is communicated with the inner cavity of the heat pump dryer body. According to the waste heat recycling device of the heat pump drying machine, hot air flow in the heat pump drying machine body is blown into the connecting plate and then enters the heat exchange pipe, in the process that the air flow flows in the heat exchange pipe, heat is transferred into a water body in the waste heat recycling box, the purpose of heat recycling is achieved, and in the using process of the heat exchange pipe, the waste heat is recycled. The servo motor is used for driving the reciprocating lead screw to rotate, the cleaning scraping plate can be driven to swing left and right, the cleaning cotton sleeve is used for removing impurities attached to the surface of the heat exchange pipe, the heat exchange effect of the heat exchange pipe is ensured, and therefore the excess material recycling efficiency of the whole device is ensured.

Description

Technical Field

[0001] This utility model relates to the field of heat pump dryer technology, and more specifically to a waste heat recovery and utilization device for a heat pump dryer. Background Technology

[0002] High-temperature heat pump dryers mainly consist of four parts: a finned evaporator (outdoor unit), a compressor, a finned condenser (indoor unit), and an expansion valve. They transfer heat from the low-temperature external environment to the drying chamber by continuously cycling the refrigerant through evaporation (absorbing heat from the outdoor environment), compression, condensation (releasing heat in the indoor drying chamber), throttling, and re-evaporation. The refrigerant circulates within the system under the action of the compressor. During operation, the heat pump dryer discharges heat through vents; therefore, a waste heat recovery device is needed to recover and reuse the discharged heat to improve environmental friendliness.

[0003] Currently, when recovering and utilizing the waste heat of heat pump desiccants, the common method is to transfer the heat from the heat pump dryer to the water through heat exchange tubes, and then utilize the heat in the water to achieve the purpose of waste heat recovery. However, during the use of heat exchange tubes, impurities in the water will accumulate on the surface of the heat exchange tubes. As the impurities gradually thicken, they will reduce the heat exchange effect between the heat and the water, thus affecting the efficiency of waste heat recovery.

[0004] In view of this, the present invention proposes a waste heat recovery and utilization device for a heat pump dryer to solve this problem. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a waste heat recovery and utilization device for a heat pump dryer to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a waste heat recovery and utilization device for a heat pump dryer, including a heat pump dryer body and a waste heat recovery box. Circulation pipes are embedded on both the left and right sides of the waste heat recovery box, and one of the circulation pipes has an exhaust fan built into it. The circulation pipes are connected to the inner cavity of the heat pump dryer body, and connecting plates are welded to one end of each of the two circulation pipes inside the waste heat recovery box. A transmission cavity is opened inside each of the two connecting plates, and a heat exchange pipe is horizontally embedded between the two connecting plates. A water outlet pipe and a water inlet pipe are respectively embedded at the top and bottom of the waste heat recovery box. Both the water outlet pipe and the water inlet pipe are connected to an external pipeline system. A cleaning component is provided inside the waste heat recovery box corresponding to the heat exchange pipes.

[0007] The cleaning assembly includes a reciprocating screw rotatably connected to the inner wall of the waste heat recovery box. A servo motor is fixedly installed on the left side of the waste heat recovery box, and the left end of the reciprocating screw extends to the left side of the waste heat recovery box through a sealed bearing. The output shaft of the servo motor is fixed to the left end of the reciprocating screw. A cleaning scraper is threaded onto the surface of the reciprocating screw. A cleaning hole is opened on the surface of the cleaning scraper. A cleaning cotton sleeve is provided on the inner wall of the cleaning hole. The heat exchange tube passes through the cleaning hole and the cleaning cotton sleeve.

[0008] As a further description of the above technical solution: a control panel is fixedly installed on the front of the waste heat recovery box, and the control panel is electrically connected to an external power source through wires.

[0009] As a further description of the above technical solution: a pump body is fixedly installed in the middle section of the water inlet pipe, and the liquid outlet end of the pump body faces the inside of the waste heat recovery tank; by setting up the pump body, the water inside the waste heat recovery tank can be driven to flow, thereby achieving the purpose of driving the water to circulate between the water inlet pipe, the water outlet pipe and the external pipeline system.

[0010] As a further description of the above technical solution: the outlet end of the water inlet pipe extends into the interior of the waste heat recovery box and is fixedly installed with a water distribution plate. The upper surface of the water distribution plate is provided with water distribution holes. By setting the water distribution plate and water distribution holes, the water entering the interior of the waste heat recovery box can emerge from the water distribution holes, thereby making the water more dispersed and in contact with the heat exchange tube.

[0011] As a further description of the above technical solution: a limiting slide bar is fixedly installed on the inner wall of the waste heat recovery box, and the cleaning scraper is slidably connected to the surface of the limiting slide bar; by setting the limiting slide bar, the stability of the cleaning scraper when it moves can be ensured.

[0012] As a further description of the above technical solution: a temperature sensor is fixedly installed on the inner wall of the waste heat recovery box, and the temperature sensor is electrically connected to the control panel; by setting the temperature sensor, the temperature inside the waste heat recovery box can be monitored, thereby facilitating the adjustment of the pump power according to temperature requirements.

[0013] As a further description of the above technical solution: the number of heat exchange tubes is several, and the several heat exchange tubes are evenly distributed between the two connecting plates; by setting several heat exchange tubes, the heat exchange area can be greatly increased and the heat exchange efficiency can be improved.

[0014] As a further description of the above technical solution: a filter is threadedly installed in the middle section of the water outlet pipe, and the filter is equipped with an activated carbon filter screen and a metal interception screen respectively; by setting up the filter, impurities inside the water body can be filtered and intercepted, thereby ensuring the cleanliness of the water body and meeting the external use of the water body.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. Compared with the prior art, the waste heat recovery and utilization device of this heat pump dryer blows the hot airflow inside the heat pump dryer body into the connecting plate through an exhaust fan inside a circulation pipe. After being transported through the heat exchange tube, it returns to the inner cavity of the heat pump dryer body from the connecting plate and circulation pipe on the other side. During the flow of air inside the heat exchange tube, heat is transferred to the water in the waste heat recovery tank, achieving the purpose of heat recovery and utilization. During the use of the heat exchange tube, the reciprocating screw driven by the servo motor can drive the cleaning scraper to swing left and right. The cleaning cotton sleeve removes the impurities attached to the surface of the heat exchange tube, ensuring the heat exchange effect of the heat exchange tube, thereby ensuring the efficiency of waste material recovery of the entire device.

[0017] 2. Compared with existing technologies, the waste heat recovery and utilization device of this heat pump dryer, by setting up a pump body, can drive the water inside the waste heat recovery tank to flow, thereby achieving the purpose of driving the water to circulate between the inlet pipe, outlet pipe and external piping system; by setting up a water distribution plate and water distribution holes, the water entering the waste heat recovery tank can be discharged from the water distribution holes, so that the water can be more dispersed to contact the heat exchange tubes; by setting up a limiting slide bar, the stability of the cleaning scraper during movement can be ensured; by setting up a temperature sensor, the temperature inside the waste heat recovery tank can be monitored, thereby facilitating the adjustment of the pump power according to temperature requirements; by setting up several heat exchange tubes, the heat exchange area can be greatly increased, thereby improving the heat exchange efficiency; by setting up a filter, impurities inside the water can be filtered and intercepted, thereby ensuring the cleanliness of the water and meeting the external use requirements of the water. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from one perspective;

[0019] Figure 2 This is a two-dimensional structural schematic diagram of the present invention from a different perspective;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of this utility model from a perspective;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the waste heat recovery box of this utility model;

[0022] Figure 5 This is a side view of the cleaning scraper structure of this utility model;

[0023] Figure 6 This is a cross-sectional structural diagram of the filter of this utility model.

[0024] The attached diagram is labeled as follows: 1. Heat pump dryer body; 2. Waste heat recovery box; 3. Circulation pipe; 4. Connecting plate; 5. Heat exchange pipe; 6. Water outlet pipe; 7. Water inlet pipe; 8. Reciprocating screw; 9. Servo motor; 10. Cleaning scraper; 11. Cleaning cotton sleeve; 12. Control panel; 13. Pump body; 14. Water distribution plate; 15. Limiting slide bar; 16. Temperature sensor; 17. Filter; 18. Activated carbon filter screen; 19. Metal interception mesh. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The waste heat recovery and utilization device of the heat pump dryer involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Reference Figures 1 to 6 This utility model provides a waste heat recovery and utilization device for a heat pump dryer, including a heat pump dryer body 1 and a waste heat recovery box 2. A control panel 12 is fixedly installed on the front of the waste heat recovery box 2, and the control panel 12 is electrically connected to an external power source through wires.

[0027] Both sides of the waste heat recovery box 2 are fitted with circulation pipes 3, and one of the circulation pipes 3 has an exhaust fan inside. The circulation pipe 3 is connected to the inner cavity of the heat pump dryer body 1. Both circulation pipes 3 are welded to one end of the waste heat recovery box 2 with connecting plates 4. Both connecting plates 4 have transmission cavities inside, and heat exchange pipes 5 are horizontally embedded between the two connecting plates 4.

[0028] It is worth noting that the waste heat recovery and utilization device of this heat pump dryer blows the hot airflow inside the heat pump dryer body 1 into the connecting plate 4 through the exhaust fan inside a circulation pipe 3. After being transported through the heat exchange pipe 5, it returns to the inner cavity of the heat pump dryer body 1 from the connecting plate 4 and the circulation pipe 3 on the other side. During the flow of the airflow inside the heat exchange pipe 5, the heat is transferred to the water inside the waste heat recovery tank 2, thereby achieving the purpose of heat recovery and utilization.

[0029] There are several heat exchange tubes 5, which are evenly distributed between the two connecting plates 4.

[0030] Furthermore, by setting up several heat exchange tubes 5, the heat exchange area can be greatly increased, thereby improving the heat exchange efficiency.

[0031] The top and bottom of the waste heat recovery box 2 are respectively fitted with an outlet pipe 6 and an inlet pipe 7, both of which are connected to the external piping system.

[0032] A pump body 13 is fixedly installed in the middle section of the water inlet pipe 7, with the liquid outlet end of the pump body 13 facing the inside of the waste heat recovery tank 2.

[0033] Furthermore, by setting up the pump body 13, the water inside the waste heat recovery tank 2 can be driven to flow, thereby achieving the purpose of driving the water to circulate between the inlet pipe 7, the outlet pipe 6 and the external pipeline system.

[0034] The waste heat recovery box 2 is equipped with a cleaning component corresponding to the heat exchange tube 5 inside.

[0035] The cleaning assembly includes a reciprocating screw 8 rotatably connected to the inner wall of the waste heat recovery box 2. A servo motor 9 is fixedly installed on the left side of the waste heat recovery box 2, and the left end of the reciprocating screw 8 extends to the left side of the waste heat recovery box 2 through a sealed bearing. The output shaft of the servo motor 9 is fixed to the left end of the reciprocating screw 8. A cleaning scraper 10 is threadedly connected to the surface of the reciprocating screw 8. A cleaning hole is opened on the surface of the cleaning scraper 10, and a cleaning cotton sleeve 11 is provided on the inner wall of the cleaning hole. The heat exchange tube 5 passes through the cleaning hole and the cleaning cotton sleeve 11.

[0036] Furthermore, during the use of heat exchange tube 5, the servo motor 9 drives the reciprocating screw 8 to rotate, which in turn drives the cleaning scraper 10 to swing left and right. The cleaning cotton sleeve 11 is used to remove impurities attached to the surface of heat exchange tube 5, ensuring the heat exchange effect of heat exchange tube 5 and thus ensuring the efficiency of residual material recovery of the entire device.

[0037] The outlet end of the water inlet pipe 7 extends into the interior of the waste heat recovery box 2 and is fixedly installed with a water distribution plate 14. The upper surface of the water distribution plate 14 is provided with water distribution holes.

[0038] It is worth noting that by setting up the water distribution plate 14 and the water distribution hole, the water entering the waste heat recovery box 2 can be allowed to emerge from the water distribution hole, thereby making the water more dispersed and in contact with the heat exchange tube 5.

[0039] A limiting slide bar 15 is fixedly installed on the inner wall of the waste heat recovery box 2, and the cleaning scraper 10 is slidably connected to the surface of the limiting slide bar 15.

[0040] Furthermore, by setting the limiting slide bar 15, the stability of the cleaning scraper 10 during movement can be ensured.

[0041] A temperature sensor 16 is fixedly installed on the inner wall of the waste heat recovery box 2, and the temperature sensor 16 is electrically connected to the control panel 12.

[0042] Furthermore, by setting a temperature sensor 16, the temperature inside the waste heat recovery box 2 can be monitored, thereby facilitating the adjustment of the power of the pump body 13 according to temperature requirements.

[0043] A filter 17 is threadedly installed in the middle section of the water outlet pipe 6. The filter 17 contains an activated carbon filter screen 18 and a metal interception screen 19.

[0044] Furthermore, by setting up filter 17, impurities inside the water body can be filtered and intercepted, thereby ensuring the cleanliness of the water body and meeting the external requirements for water use. After a period of use, filter 17 can be opened to clean and replace the activated carbon filter screen 18 and the metal interception screen 19.

[0045] Finally, it should be noted that the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A waste heat recovery device of a heat pump dryer, comprising a heat pump dryer body (1) and a waste heat recovery tank (2), characterized in that: Both sides of the waste heat recovery tank (2) are embedded with circulating pipes (3), and one of the circulating pipes (3) is internally provided with an exhaust fan, the circulating pipe (3) is communicated with the inner cavity of the heat pump drying machine body (1), and one end of the two circulating pipes (3) inside the waste heat recovery tank (2) is welded with a connecting plate (4), the inside of the two connecting plates (4) is provided with a transmission cavity, and a heat exchange pipe (5) is transversely embedded between the two connecting plates (4), the top and bottom of the waste heat recovery tank (2) are respectively embedded with a water outlet pipe (6) and a water inlet pipe (7), the water outlet pipe (6) and the water inlet pipe (7) are communicated with the external pipeline system, and the inside of the waste heat recovery tank (2) is provided with a cleaning assembly corresponding to the heat exchange pipe (5); The cleaning assembly comprises a reciprocating screw rod (8) rotatably connected to the inner wall of the waste heat recovery tank (2), a servo motor (9) is fixedly installed on the left side of the waste heat recovery tank (2), and the left end of the reciprocating screw rod (8) extends to the left side of the waste heat recovery tank (2) through a sealing bearing, the output shaft of the servo motor (9) is fixedly connected with the left end of the reciprocating screw rod (8), and the surface of the reciprocating screw rod (8) is threadedly connected with a cleaning scraper (10), the surface of the cleaning scraper (10) is provided with a cleaning hole, the inner wall of the cleaning hole is provided with a cleaning cotton sleeve (11), and the heat exchange pipe (5) is arranged in the cleaning hole and the cleaning cotton sleeve (11).

2. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The front of the waste heat recovery tank (2) is fixedly installed with a control panel (12), and the control panel (12) is electrically connected with the external power supply through wires.

3. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The middle segment position of the water inlet pipe (7) is fixedly installed with a pump body (13), and the liquid outlet end of the pump body (13) faces the inside of the waste heat recovery tank (2).

4. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The water outlet end of the water inlet pipe (7) extends to the inside of the waste heat recovery tank (2) and is fixedly installed with a water distribution plate (14), and the upper surface of the water distribution plate (14) is provided with a water distribution hole.

5. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The inner wall of the waste heat recovery tank (2) is fixedly installed with a limiting slide rod (15), and the cleaning scraper (10) is slidably connected with the surface of the limiting slide rod (15).

6. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The inner wall of the waste heat recovery tank (2) is fixedly installed with a temperature sensor (16), and the temperature sensor (16) is electrically connected with the control panel (12).

7. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The number of the heat exchange pipes (5) is several, and the several heat exchange pipes (5) are uniformly distributed between the two connecting plates (4).

8. The waste heat recovery device of a heat pump dryer according to claim 1, characterized in that: The middle segment position of the water outlet pipe (6) is threadedly installed with a filter (17), and the inside of the filter (17) is respectively provided with an activated carbon filter screen (18) and a metal interception screen (19).

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