A medium and low temperature air source heat pump drying device

Abstract

The present invention discloses a medium-low temperature air source heat pump dryer device, comprising a drying room, wherein the drying room is equipped with a preheating mechanism and a drying mechanism; the preheating mechanism comprises: a first combustion chamber, an isolation pipe, a water inlet pipe and a heat dissipation structure; the first combustion chamber is fixed to the outside of the drying room, the two ends of the isolation pipe are fixed to the inside of the first combustion chamber, the water inlet pipe runs through the middle part of the isolation pipe, the heat dissipation structure is arranged in the drying room, and the drying mechanism comprises: an indoor evaporator, a four-way valve, a first pipe, a compressor, a second pipe, a separator, a preheating structure, a condensation structure, a control structure and an air supply structure; the beneficial effects of the present invention are reasonable design, low cost, and easy use, which changes the current situation that the existing dryer can only be used for temperatures higher than the ambient temperature, meets the use requirements, and improves practicality.

Description

Technical Field

[0001] The invention relates to the technical field of drying machines, in particular to a medium-low temperature air source heat pump drying machine device. Background Art

[0002] Dryers can be divided into industrial and civil types. Industrial dryers are also called drying equipment or dryers. Civil dryers are a type of washing machine, generally used to remove moisture from clothing and other textiles after washing and dehydration.

[0003] There are several modes of dryers, such as belt drying, drum drying, box drying, tower drying, etc. The heat sources include coal, electricity, gas, etc. The materials are dried in hot air flow and radiation processes. Hot air drum drying is a process in which the hot air flow moves from the tail to the front, fully contacts the materials, and fully utilizes the heat transfer through heat conduction, convection, and radiation. The heat energy is directly transferred to the materials, so that the moisture of the materials is continuously evaporated in the drum. The induced draft device at the inlet draws out a large amount of moisture and wet air flow to prevent secondary pollution caused by dust discharge. The material movement is promoted through internal spiral stirring, sweeping, and copying to complete the entire drying process. Countercurrent conduction dehumidification avoids reducing repeated drying procedures.

[0004] However, when the required drying temperature of the existing dryer is lower than the ambient temperature or close to the ambient temperature, the dehumidifier cannot meet the requirements well, and the existing dryer can only be used in the current situation where the temperature is higher than the ambient temperature. The device is now designed to meet both the temperature requirements and the humidity requirements. In view of this, in-depth research was conducted on the above issues, and this case was created. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems. A medium-low temperature air source heat pump dryer device is designed to solve the problem that when the required drying temperature of the existing dryer is lower than the ambient temperature or close to the ambient temperature, the dehumidifier cannot meet the requirements well, and the existing dryer can only be used in temperatures higher than the ambient temperature.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a medium-low temperature air source heat pump drying device, comprising a drying room, wherein the drying room is equipped with a preheating mechanism and a drying mechanism;

[0007] The preheating mechanism comprises: a first combustion chamber, an isolation pipe, a water inlet pipe and a heat dissipation structure;

[0008] The first combustion chamber is fixed to the outside of the drying room, the two ends of the isolation pipe are fixed to the inside of the first combustion chamber, the water inlet pipe runs through the middle part of the isolation pipe, and the heat dissipation structure is arranged inside the drying room.

[0009] The drying mechanism comprises: an indoor evaporator, a four-way valve, a first pipeline, a compressor, a second pipeline, a separator, a condensation structure, a control structure and an air supply structure;

[0010] The indoor evaporator is placed inside the drying room, the four-way valve is connected to the air outlet pipe of the indoor evaporator, the first pipeline is connected to one end of the four-way valve, the compressor is placed inside the drying room, and the air inlet end is connected to the first pipeline, one end of the second pipeline is connected to one end of the compressor, one end of the separator is connected to the other end of the second pipeline, and the other end of the separator is connected to the four-way valve, the condensation structure is placed in the drying room and connected to the four-way, the control structure is placed inside the drying room and connected to the first pipeline, and the air supply structure is placed inside and outside the drying room.

[0011] Preferably, the heat dissipation structure comprises: a second combustion chamber, a water pot, a housing, a plurality of heat conducting plates, two fans, a plurality of electric push rods and two blocking doors;

[0012] The second combustion chamber is arranged inside the drying room, the water pot is fixed to the upper end of the combustion chamber, the shell is fixed to the upper end of the water pot, a plurality of the heat conducting plates penetrate the lower wall of the shell, the two fans are respectively arranged on the wall of the shell, a plurality of the electric push rods are respectively embedded in the wall of the shell, and the two blocking doors are movably arranged inside the wall of the shell and the two ends are respectively fixed on the telescopic ends of the two electric push rods.

[0013] Preferably, the condensation structure comprises: a third pipeline, an indoor condenser, a first one-way valve, a fourth pipeline and an outdoor condenser;

[0014] One end of the third pipe is connected to the four-way valve and the second pipe, the indoor condenser is placed inside the drying room and is connected to the other end of the third pipe, the first one-way valve is placed on the third pipe, one end of the fourth pipe is connected to the third pipe, the outdoor condenser is placed outside the drying room, and the outdoor condenser is connected to the other end of the fourth pipe.

[0015] Preferably, the control structure includes: a drying solenoid valve, a temperature control solenoid valve, a fifth pipeline, a sixth pipeline and a filter unit;

[0016] The drying solenoid valve is arranged at the outlet end of the indoor condenser, the temperature control solenoid valve is arranged at the outlet end of the outdoor condenser, the fifth pipe is connected to the outlet end of the outdoor condenser and the outlet end of the indoor condenser, the middle part of the sixth pipe is connected to the fifth pipe, and the filter part is arranged inside the dryer and connected to the sixth pipe.

[0017] Preferably, the air supply structure includes: an indoor circulation fan, an exhaust fan and an outdoor evaporation fan;

[0018] The indoor circulation fan is arranged inside the drying room, the exhaust fan is arranged inside the drying room, and the outdoor evaporation fan is arranged outside the drying room.

[0019] Preferably, a defrost unit is further installed on the fourth pipeline, and the defrost unit includes: a connecting pipe, two third one-way valves and a defrost solenoid valve;

[0020] The connecting pipe is connected to the fourth pipe, the two third solenoid valves are respectively arranged on the connecting pipe and the fourth pipe, and the defrost solenoid valve is arranged on the connecting pipe.

[0021] Preferably, the filter unit comprises: a liquid reservoir, a third needle valve, a filter, a seventh pipeline, a water return pipe and a switch assembly;

[0022] The water inlet end of the liquid reservoir is connected to one end of the sixth pipe, the third needle valve is arranged on the water outlet end of the liquid reservoir, the filter is connected to the water outlet end of the liquid reservoir, one end of the seventh pipe is connected to the water outlet end of the filter and the water inlet end of the indoor evaporator, the seventh pipe is connected to the sixth pipe, the return pipe is connected to the seventh pipe, and the switch assembly is arranged on the seventh pipe.

[0023] Preferably, the switch assembly includes: a thermal expansion valve, two second one-way valves and a main circuit solenoid valve;

[0024] The thermal expansion valve is arranged on the seventh pipeline, the two second one-way valves are arranged on the sixth pipeline, and the main electromagnetic valve is arranged on the seventh pipeline.

[0025] Preferably, a first needle valve is installed on the first pipeline.

[0026] Preferably, a second needle valve is installed on the second pipeline, and a pressure switch is installed on the second pipeline.

[0027] A medium- and low-temperature air source heat pump dryer device manufactured using the technical solution of the present invention has a reasonable design, low cost, and is easy to use. It changes the current situation where the existing dryer can only be used at temperatures higher than the ambient temperature, meets the use requirements, improves practicality, and effectively solves the problem mentioned in the background technology that when the required drying temperature of the existing dryer is lower than the ambient temperature or close to the ambient temperature, the dehumidifier cannot meet the requirements well, and the existing dryer can only be used at temperatures higher than the ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic diagram of a top view and cross-section structure of a medium-low temperature air source heat pump drying device according to the present invention.

[0029] Figure 2 This is a schematic diagram of the left side cross-sectional structure of the first combustion chamber of a medium- and low-temperature air source heat pump dryer device described in the present invention.

[0030] Figure 3 This is a schematic diagram of the right side sectional structure of the second combustion chamber of a medium- and low-temperature air source heat pump dryer device described in the present invention.

[0031] Figure 4 This is a right view structural schematic diagram of the second combustion chamber of a medium-low temperature air source heat pump dryer device described in the present invention.

[0032] Figure 5 For the present invention Figure 1 A schematic diagram of a partially enlarged structure of an electric push rod of a medium- and low-temperature air source heat pump dryer device.

[0033] Figure 6 This is a schematic diagram of a partially enlarged structure of a third one-way valve of a medium-low temperature air source heat pump dryer device described in step 1 of the present invention.

[0034] In the figure: 1. Drying room; 2. Indoor evaporator; 3. Four-way valve; 4. First pipeline; 5. Compressor; 6. Second pipeline; 7. Separator; 8. Third pipeline; 9. Indoor condenser; 10. First check valve; 11. Fourth pipeline; 12. Outdoor condenser; 13. Drying solenoid valve; 14. Temperature control solenoid valve; 15. Fifth pipeline; 16. Sixth pipeline; 17. Indoor circulation fan; 18. Exhaust fan; 19. Outdoor evaporation fan; 20. Connecting pipe; 21. Third check valve; 22 , defrost solenoid valve; 23, liquid storage tank; 24, third needle valve; 25, filter; 26, seventh pipeline; 27, return pipe; 28, thermal expansion valve; 29, second one-way valve; 30, main solenoid valve; 31, first needle valve; 32, second needle valve; 33, pressure switch; 34, first combustion chamber; 35, isolation pipeline; 36, water inlet pipe; 37, second combustion chamber; 38, water pot; 39, shell; 40, heat conductive sheet; 41, fan; 42, electric push rod; 43, blocking door. DETAILED DESCRIPTION

[0035] Embodiment: A medium-low temperature air source heat pump drying device comprises a drying room 1, wherein the drying room 1 is equipped with a preheating mechanism and a drying mechanism;

[0036] See also Figure 1-6 In the specific implementation process, the preheating mechanism includes: a first combustion chamber 34, an isolation pipe 35, a water inlet pipe 36 and a heat dissipation structure; the connection relationship is as follows:

[0037] The first combustion chamber 34 is fixed to the outside of the drying room 1 , both ends of the isolation pipe 35 are fixed inside the first combustion chamber 34 , the water inlet pipe 36 runs through the middle of the isolation pipe 35 , and the heat dissipation structure is placed inside the drying room 1 .

[0038] In the specific implementation process, it should be noted that the drying mechanism includes: an indoor evaporator 2, a four-way valve 3, a first pipeline 4, a compressor 5, a second pipeline 6, a separator 7, a condensation structure, a control structure and an air supply structure; the connection relationship is as follows:

[0039] The indoor evaporator 2 is placed inside the drying room 1, the four-way valve 3 is connected to the air outlet pipe of the indoor evaporator 2, the first pipe 4 is connected to one end of the four-way valve 3, the compressor 5 is placed inside the drying room 1, and the air inlet end is connected to the first pipe 4, one end of the second pipe 6 is connected to one end of the compressor 5, one end of the separator 7 is connected to the other end of the second pipe 6, and the other end of the separator 7 is connected to the four-way valve 3, the condensation structure is placed in the drying room 1 and connected to the four-way, the control structure is placed inside the drying room 1 and connected to the first pipe 4, and the air supply structure is placed inside and outside the drying room 1.

[0040] In the specific implementation process, it should be noted that the heat dissipation structure includes: a second combustion chamber 37, a water pot 38, a shell 39, a plurality of heat conducting sheets 40, two fans 41, a plurality of electric push rods 42 and two blocking doors 43; the connection relationship is as follows:

[0041] The second combustion chamber 37 is arranged inside the drying room 1, the water pot 38 is fixed to the upper end of the combustion chamber, the shell 39 is fixed to the upper end of the water pot 38, a plurality of heat conducting plates 40 penetrate the lower wall of the shell 39, the two fans 41 are respectively arranged on the wall of the shell 39, a plurality of electric push rods 42 are respectively embedded in the wall of the shell 39, and the two blocking doors 43 are movably arranged inside the wall of the shell 39 and the two ends are respectively fixed on the telescopic ends of the two electric push rods 42.

[0042] In the specific implementation process, it should be noted that the condensation structure includes: a third pipeline 8, an indoor condenser 9, a first one-way valve 10, a fourth pipeline 11 and an outdoor condenser 12; the connection relationship is as follows:

[0043] One end of the third pipe 8 is connected to the four-way valve 3 and the second pipe 6, the indoor condenser 9 is placed inside the drying room 1 and is connected to the other end of the third pipe 8, the first one-way valve 10 is placed on the third pipe 8, one end of the fourth pipe 11 is connected to the third pipe 8, the outdoor condenser 12 is placed outside the drying room, and the outdoor condenser 12 is connected to the other end of the fourth pipe 11.

[0044] In the specific implementation process, it should be noted that the control structure includes: a drying solenoid valve 13, a temperature control solenoid valve 14, a fifth pipeline 15, a sixth pipeline 16 and a filter unit; the connection relationship is as follows:

[0045] The drying solenoid valve 13 is arranged at the outlet end of the indoor condenser 9, the temperature control solenoid valve 14 is arranged at the outlet end of the outdoor condenser 12, the fifth pipe 15 is connected to the outlet end of the outdoor condenser 12 and the outlet end of the indoor condenser 9, the middle part of the sixth pipe 16 is connected to the fifth pipe 15, and the filter part is arranged inside the dryer and connected to the sixth pipe 16.

[0046] In the specific implementation process, it should be noted that the air supply structure includes: an indoor circulation fan 17, an exhaust fan 18 and an outdoor evaporation fan 19; the connection relationship is as follows:

[0047] The indoor circulation fan 17 is arranged inside the drying room 1 , the exhaust fan 18 is arranged inside the drying room 1 , and the outdoor evaporation fan 19 is arranged outside the drying room 1 .

[0048] In the specific implementation process, it should be noted that a defrost unit is also installed on the fourth pipeline 11, and the defrost unit includes: a connecting pipe 20, two third one-way valves 21 and a defrost solenoid valve 22; the connection relationship is as follows:

[0049] The connecting pipe 20 is connected to the fourth pipe 11 , the two third solenoid valves are respectively arranged on the connecting pipe 20 and the fourth pipe 11 , and the defrosting solenoid valve 22 is arranged on the connecting pipe 20 .

[0050] In the specific implementation process, it should be noted that the filtering part includes: a liquid reservoir 23, a third needle valve 24, a filter 25, a seventh pipeline 26, a return pipe 27 and a switch assembly; the connection relationship is as follows:

[0051] The water inlet end of the liquid reservoir 23 is connected to one end of the sixth pipe 16, the third needle valve 24 is placed on the water outlet end of the liquid reservoir 23, the filter 25 is connected to the water outlet end of the liquid reservoir 23, one end of the seventh pipe 26 is connected to the water outlet end of the filter 25 and the water inlet end of the indoor evaporator 2, the seventh pipe 26 is connected to the sixth pipe 16, the return pipe 27 is connected to the seventh pipe 26, and the switch assembly is placed on the seventh pipe 26.

[0052] In the specific implementation process, it should be noted that the switch assembly includes: a thermal expansion valve 28, two second one-way valves 29 and a main circuit solenoid valve 30; the connection relationship is as follows:

[0053] The thermal expansion valve 28 is disposed on the seventh pipeline 26 , the two second one-way valves 29 are disposed on the sixth pipeline 16 , and the main line solenoid valve 30 is disposed on the seventh pipeline 26 .

[0054] From the above overall situation, it can be known that: when the present device is used, first when the required drying temperature in the drying room 1 is lower than the outdoor ambient temperature, the indoor evaporator 2 and the outdoor condenser 12 start to work, and the low-pressure gas from the indoor evaporator 2 enters the compressor 5 through the first pipe 4, is compressed into a high-temperature and high-pressure gas, and is discharged through the second pipe 6. At this time, the first one-way valve 10 on the third pipe 8 is closed, and then enters the outdoor condenser 12 through the third pipe 8 and the fourth pipe 11. The defrost solenoid valve 22 on the connecting pipe 20 is used to control the defrosting of the outdoor condenser 12, and then the high-temperature gas enters the condenser to release heat, realizes heat exchange, and then the air flows The air enters the sixth pipe 16 through the fifth pipe 15. The drying solenoid valve 13 on the fifth pipe 15 is used to realize automatic drying. The temperature control solenoid valve 14 is used to realize automatic temperature control. Then the second one-way valve 29 is opened, and the water in the air flow enters the liquid reservoir 23. The third needle valve 24 is used to adjust or cut off the liquid flowing out of the liquid reservoir 23. The liquid is filtered through the filter 25. Then the main solenoid valve 30 is opened. Since one end of the seventh pipe 26 is connected to the water inlet end of the indoor evaporator 2, circulation is realized. At the same time, the air flow coming out of the compressor 5 contains liquid. The liquid is transported to the separator 7 through the second pipe 6 for separation. After the liquid is separated, it passes through the return pipe 27 and enters the sixth pipe 16. In the liquid reservoir 23, when the required temperature of the drying room 1 is higher than the outdoor ambient temperature, first, the water inlet pipe 36 is connected to the tap water pipe, and then the first combustion chamber 34 burns fuel, and the fuel heats the inside of the first combustion chamber 34 outside the isolation pipe 35, thereby heating the water inlet pipe 36. In the process of tap water entering the water pot 38 through the water inlet pipe 36, the first combustion chamber 34 preliminarily heats the tap water, and then the second combustion chamber 37 burns to heat the water pot 38. The temperature of the hot water is derived under the action of the heat conducting sheet 40, and then the electric push rod 42 begins to extend, driving the blocking door 43 to open, and the fan 41 begins to rotate, and the heat inside the shell 39 is discharged. The air is blown into the drying room 1, which increases the temperature rise rate of the drying room 1, and the indoor evaporator 2 and the indoor condenser 9 are turned on to work. During this working process, the first one-way valve 10 on the third pipe 8 is opened, and the airflow passes through the third pipe 8, enters the indoor condenser 9, and then enters the liquid storage tank 23 through the fifth pipe 15 and the sixth pipe 16. After being filtered by the filter 25, it enters the indoor evaporator 2 through the seventh pipe 26 to realize circulation. The exhaust fan 18 is used for exhausting air, the indoor circulation fan 17 is used to realize air circulation in the room and dissipate heat to the indoor evaporator 2, and the outdoor evaporation fan 19 is used to adjust the outdoor temperature and to cool the outdoor condenser 12.

[0055] Preferably, further, a first needle valve 31 is installed on the first pipeline 4 .

[0056] Preferably, further, a second needle valve 32 is installed on the second pipeline 6 , and a pressure switch 33 is installed on the second pipeline 6 .

[0057] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A medium-low temperature air source heat pump drying device, comprising a drying room (1), characterized in that: The drying room (1) is equipped with a preheating mechanism and a drying mechanism; The preheating mechanism comprises: a first combustion chamber (34), an isolation pipe (35), a water inlet pipe (36) and a heat dissipation structure; The first combustion chamber (34) is fixed to the outside of the drying room (1), the two ends of the isolation pipe (35) are fixed to the inside of the first combustion chamber (34), the water inlet pipe (36) runs through the middle part of the isolation pipe (35), and the heat dissipation structure is arranged inside the drying room (1); The drying mechanism comprises: an indoor evaporator (2), a four-way valve (3), a first pipeline (4), a compressor (5), a second pipeline (6), a separator (7), a condensation structure, a control structure and an air supply structure; The indoor evaporator (2) is arranged inside the drying room (1); the four-way valve (3) is connected to the air outlet pipe of the indoor evaporator (2); the first pipeline (4) is connected to one end of the four-way valve (3); the compressor (5) is arranged inside the drying room (1), and the air inlet end is connected to the first pipeline (4); one end of the second pipeline (6) is connected to one end of the compressor (5); one end of the separator (7) is connected to the other end of the second pipeline (6); the other end of the separator (7) is connected to the four-way valve (3); the condensation structure is arranged inside the drying room (1) and connected to the four-way valve; the control structure is arranged inside the drying room (1) and connected to the first pipeline (4); and the air supply structure is arranged inside and outside the drying room (1); The heat dissipation structure comprises: a second combustion chamber (37), a water pot (38), a housing (39), a plurality of heat conducting sheets (40), two fans (41), a plurality of electric push rods (42) and two blocking doors (43); The second combustion chamber (37) is arranged inside the drying room (1), the water pot (38) is fixed to the upper end of the combustion chamber, the shell (39) is fixed to the upper end of the water pot (38), a plurality of heat conducting plates (40) penetrate the lower wall of the shell (39), the two fans (41) are respectively arranged on the wall of the shell (39), a plurality of electric push rods (42) are respectively embedded inside the wall of the shell (39), and the two blocking doors (43) are movably arranged inside the wall of the shell (39) and the two ends are respectively fixed to the telescopic ends of the two electric push rods (42); The condensation structure comprises: a third pipeline (8), an indoor condenser (9), a first one-way valve (10), a fourth pipeline (11) and an outdoor condenser (12); One end of the third pipe (8) is connected to the four-way valve (3) and the second pipe (6); the indoor condenser (9) is arranged inside the drying room (1) and is connected to the other end of the third pipe (8); the first one-way valve (10) is arranged on the third pipe (8); one end of the fourth pipe (11) is connected to the third pipe (8); the outdoor condenser (12) is arranged outside the drying room; and the outdoor condenser (12) is connected to the other end of the fourth pipe (11); The control structure comprises: a drying solenoid valve (13), a temperature control solenoid valve (14), a fifth pipeline (15), a sixth pipeline (16) and a filter unit; The drying solenoid valve (13) is arranged at the outlet end of the indoor condenser (9), the temperature control solenoid valve (14) is arranged at the outlet end of the outdoor condenser (12), the fifth pipe (15) is connected to the outlet end of the outdoor condenser (12) and the outlet end of the indoor condenser (9), the middle part of the sixth pipe (16) is connected to the fifth pipe (15), and the filter part is arranged inside the dryer and is connected to the sixth pipe (16); The air supply structure comprises: an indoor circulation fan (17), an exhaust fan (18) and an outdoor evaporation fan (19); The indoor circulation fan (17) is arranged inside the drying room (1), the exhaust fan (18) is arranged inside the drying room (1), and the outdoor evaporation fan (19) is arranged outside the drying room (1); The fourth pipeline (11) is also provided with a defrosting unit, which comprises: a connecting pipe (20), two third one-way valves (21) and a defrosting solenoid valve (22); The connecting pipe (20) is connected to the fourth pipe (11), the two third one-way valves are respectively arranged on the connecting pipe (20) and the fourth pipe (11), and the defrosting solenoid valve (22) is arranged on the connecting pipe (20).

2. A medium and low temperature air source heat pump drying device according to claim 1, characterized in that: The filtering part comprises: a liquid storage device (23), a third needle valve (24), a filter (25), a seventh pipeline (26), a water return pipe (27) and a switch assembly; The water inlet end of the liquid reservoir (23) is connected to one end of the sixth pipe (16), the third needle valve (24) is arranged on the water outlet end of the liquid reservoir (23), the filter (25) is connected to the water outlet end of the liquid reservoir (23), one end of the seventh pipe (26) is connected to the water outlet end of the filter (25) and the water inlet end of the indoor evaporator (2), the seventh pipe (26) and the sixth pipe (16) are connected to each other, the return pipe (27) is connected to the seventh pipe (26), and the switch assembly is arranged on the seventh pipe (26).

3. A medium and low temperature air source heat pump drying device according to claim 2, characterized in that: The switch assembly comprises: a thermal expansion valve (28), two second one-way valves (29) and a main circuit solenoid valve (30); The thermal expansion valve (28) is arranged on the seventh pipeline (26), the two second one-way valves (29) are arranged on the sixth pipeline (16), and the main line solenoid valve (30) is arranged on the seventh pipeline (26).

4. A medium and low temperature air source heat pump drying device according to claim 1, characterized in that: A first needle valve (31) is installed on the first pipeline (4).

5. A medium and low temperature air source heat pump drying device according to claim 1, characterized in that: A second needle valve (32) is installed on the second pipeline (6), and a pressure switch (33) is installed on the second pipeline (6).

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