Heat pump air conditioning unit with constant temperature regulation and control function

Abstract

The invention discloses a heat pump air conditioning unit with a constant temperature regulation and control function, and relates to the technical field of heat pump air conditioning units, the heat pump air conditioning unit comprises a rack, a constant temperature regulation and control device, an evaporator, a defrosting device, an electrical cabinet, a condenser, a compressor and an expansion valve. The constant-temperature regulation and control device can automatically adjust the air inlet amount of the fan according to the temperature, so that the air flowing speed and the heat exchange efficiency around the heat exchanger are effectively controlled, stable control over the internal temperature of the system is achieved, and when the defrosting device detects that the surface of the external evaporator is frosted, the defrosting device is automatically started, and the four-way reversing valve is controlled to switch the flowing direction of a refrigerant; the frost on the surface of the evaporator is removed, the stable operation capacity of the unit in winter or in the cold and humid environment is improved, after defrosting is conducted for a period of time, the unit can be switched back to the conventional operation mode, meanwhile, the defrosting device is controlled to reset, continuous operation of multiple defrosting cycles is achieved, the manual maintenance frequency is reduced, and the intelligent level of the whole unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump air-conditioning units, in particular to a heat pump air-conditioning unit with a constant temperature control function. Background Art

[0002] Heat pump air conditioning units are air conditioning devices that combine cooling and heating functions. They utilize solar energy stored in the earth's soil, air, and water as cooling and heating sources, operating in dual-mode operation. This clean and environmentally friendly technology utilizes renewable resources and is widely used in residential, commercial, and industrial plants. Compared to traditional electric or gas heating systems, heat pump systems utilize low-grade thermal energy in the environment, driving the compressor with less electricity to achieve heat transfer and regulation, resulting in high energy efficiency, low operating costs, and environmental protection and energy conservation. However, existing heat pump air conditioning units have drawbacks. When the unit's overall temperature fluctuates, it adversely affects heating and cooling performance. Furthermore, when operating in low-temperature, high-humidity environments, frost easily forms on the evaporator surface, significantly reducing heat exchange efficiency, increasing system energy consumption, and affecting the unit's overall stability and service life.

[0003] The object of the present invention is to provide a heat pump air-conditioning unit with a constant temperature control function to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a heat pump air-conditioning unit includes a frame, a control shell is installed above the frame, a constant temperature control device is installed inside the control shell, an evaporator is installed below the constant temperature control device, a defrost device is installed on one side of the evaporator, an electrical cabinet is installed below the evaporator, a condenser and a compressor are installed on one side of the electrical cabinet, an expansion valve is installed on one side of the compressor, the evaporator, the defrost device, the electrical cabinet, the condenser, the compressor and the expansion valve are installed inside the frame, and the evaporator, the electrical cabinet, the condenser, the compressor and the expansion valve are connected to the control system. When the heat pump air conditioner is cooling, the refrigerant in the condenser absorbs heat from the room and evaporates. The refrigerant vapor enters the compressor through the four-way reversing valve. The compressor raises the refrigerant vapor from low pressure to high pressure. The high-pressure refrigerant vapor enters the evaporator to condense and release heat. The fan takes away the heat released by the refrigerant. The high-pressure refrigerant enters the expansion valve. The expansion valve throttles the refrigerant from high pressure to low pressure, and the low-pressure refrigerant returns to the condenser. When the heat pump air conditioner is heating, the fan introduces external heat into the evaporator. The refrigerant in the evaporator absorbs heat and evaporates. The refrigerant vapor passes through the four-way reversing valve and enters the compressor. The compressor raises the refrigerant vapor from low pressure to high pressure. The high-pressure refrigerant vapor enters the condenser to condense and release heat, transferring the heat to the room. The high-pressure refrigerant enters the expansion valve. The expansion valve throttles the refrigerant from high pressure to low pressure, and the low-pressure refrigerant returns to the evaporator.

[0005] The constant temperature control device includes a filter, which is installed inside the control shell, a movable plate is installed below the filter, a fixed plate is installed below the movable plate, a first rotating shaft is installed on one side of the first rotating shaft, a support plate is installed on the first rotating shaft, a second rotating shaft is installed on one side of the support plate, a second bevel gear and a first gear are installed on the second rotating shaft, the first bevel gear and the second bevel gear are meshed, a fixed block is installed on the inner wall of the control shell, the interior of the fixed block is slidably connected with a first rack, a bimetallic block is installed on one side of the first rack, the bimetallic block is installed inside the fixed block, the first gear and the first rack are meshed, a fan is installed below the fixed block, and the fan is connected to the control system. When the temperature rises, the bimetallic block bends and drives the first rack to slide in the fixed block, and the first rack slides away from the fixed block. The first rack drives the first gear to rotate, and the first gear drives the second rotating shaft to rotate, and the second rotating shaft drives the second bevel gear to rotate, and the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the first rotating shaft to rotate, and the first rotating shaft drives the movable plate to rotate, increasing the air intake of the fan. When the temperature drops, the bimetallic block recovers and drives the first rack back to its initial position, the first rack drives the first gear to reverse, the first gear drives the second rotating shaft to reverse, the second rotating shaft drives the second bevel gear to reverse, the second bevel gear drives the first bevel gear to reverse, the first bevel gear drives the first rotating shaft to reverse, and the first rotating shaft drives the movable plate to reverse back to its initial position.

[0006] The defrosting device comprises a locking device, a rotating rod is installed on the locking device, a detecting device is installed on the rotating rod, a driving device is installed on one side of the locking device, and a resetting device is installed on one side of the driving device.

[0007] The detection device includes a detection housing that rotates on a rotating rod. A second gear is mounted inside the detection housing, which is mounted on the rotating rod. A track is mounted inside the detection housing, and a detection head is slidably connected to the track. One side of the detection head abuts the surface of the evaporator. A cylinder is mounted on one side of the detection head, and a first spring is sleeved on the outer surface of the cylinder. One side of the first spring is mounted in the track, and the detection head is mounted on the other side of the first spring. A second rack is mounted on one side of the cylinder, and the second rack meshes with the second gear. When frost forms on the evaporator surface, the frost drives the detection head to slide within the track, moving the detection head away from the evaporator. The detection head drives the cylinder to move, which in turn drives the second rack to rotate, which in turn drives the second gear to rotate, which in turn drives the rotating rod to rotate. When the frost on the evaporator surface is removed, the first spring stretches, driving the cylinder to slide within the track, moving the cylinder toward the evaporator. The cylinder drives the second rack to move, which in turn drives the second gear to reverse, which in turn drives the rotating rod to reverse.

[0008] The locking device includes a first support block, the first support block is mounted on the frame, the rotating rod rotates on the first support block, the rotating rod is mounted on the first pinion, the second support block is mounted on the frame, one side of the second support block is rotatably connected to the second pinion, a first belt is mounted on the first pinion and the second pinion, a third bevel gear is mounted on one side of the second pinion, a third rotating shaft is rotatably connected to the frame, a fourth bevel gear and a third gear are mounted on the third rotating shaft, the third bevel gear and the fourth bevel gear are meshed, a third rack is slidably connected to the frame, the third gear and the third rack are meshed, and a first pawl is mounted on one side of the third rack. The rotating rod drives the first pinion to rotate, the first pinion drives the first belt to rotate, the first belt drives the second pinion to rotate, the second pinion drives the third bevel gear to rotate, the third bevel gear drives the fourth bevel gear to rotate, the fourth bevel gear drives the third rotating shaft to rotate, the third rotating shaft drives the third gear to rotate, the third gear drives the third rack to slide on the frame, the third rack slides in the direction away from the first supporting block, the third rack drives the first pawl to move, and the first pawl is disengaged from the first ratchet. When the frost on the surface of the evaporator is removed, the rotating rod drives the first pinion gear to reverse, the first pinion gear drives the first belt to reverse, the first belt drives the second pinion gear to reverse, the second pinion gear drives the third bevel gear to reverse, the third bevel gear drives the fourth bevel gear to reverse, the fourth bevel gear drives the third rotating shaft to reverse, the third rotating shaft drives the third gear to reverse, the third gear drives the third rack to slide on the frame, the third rack slides in the direction close to the first supporting block, the third rack drives the first pawl to move, and the first pawl rests on the first ratchet.

[0009] The driving device includes a third support block, which is mounted on the frame, and the third support block is rotatably connected to the fourth rotating shaft, the first ratchet, the turntable and the third pinion are mounted on the fourth rotating shaft, the first ratchet and the first pawl are engaged, a counterweight is mounted on the turntable, the fourth support block is mounted on the frame, and the fourth support block is rotatably connected to the fifth rotating shaft, one side of the fifth rotating shaft is mounted on the reset device, the other side of the fifth rotating shaft is mounted with a fourth pinion and a half gear, and a second belt is mounted on the third pinion and the fourth pinion. When the first pawl disengages from the first ratchet, the counterweight descends, driving the turntable. The turntable then drives the fourth shaft, which in turn drives the third pinion. The third pinion drives the second belt, which in turn drives the fourth pinion. The fourth pinion drives the fifth shaft, which in turn drives the piston shaft and half gear of the four-way reversing valve. The four-way reversing valve switches the refrigerant flow direction, directing high-temperature, high-pressure refrigerant back into the evaporator, thereby transforming the evaporator from a heat-absorbing end to a heat-releasing end and removing frost from the evaporator surface. Once the frost is removed, the half gear drives the fifth shaft, which in turn drives the fourth pinion. The fourth pinion drives the second belt, which in turn drives the third pinion. The third pinion drives the fourth shaft, which in turn drives the turntable, which in turn drives the counterweight back to its initial position.

[0010] The reset device includes a fourth gear, one side of the fourth support block is rotatably connected to the sixth rotating shaft, the fourth gear is mounted on the sixth rotating shaft, a fifth bevel gear is mounted on one side of the sixth rotating shaft, a clockwork barrel is mounted on the frame, a one-way gear and a sixth bevel gear are mounted on the clockwork shaft of the clockwork barrel, the fifth bevel gear and the sixth bevel gear are meshed, a timing device is mounted on one side of the clockwork barrel, a bracket is mounted above the timing device, a four-way reversing valve is mounted on the bracket, the fifth rotating shaft is mounted on the piston shaft of the four-way reversing valve, and a seventh bevel gear is mounted on the fifth rotating shaft. The half gear drives the fourth gear to rotate, the fourth gear drives the sixth rotating shaft to rotate, the sixth rotating shaft drives the fifth bevel gear to rotate, the fifth bevel gear drives the sixth bevel gear to rotate, the sixth bevel gear drives the clockwork shaft of the clockwork barrel to rotate, tighten the clockwork, the clockwork shaft drives the rotating block to rotate, the rotating block drives the second pawl to slide on the second ratchet, when the half gear and the fourth gear are disengaged, the clockwork drives the clockwork shaft to rotate, the clockwork shaft drives the rotating block to rotate, the rotating block drives the second pawl to drive the second ratchet to rotate, and the second ratchet drives the outer half gear to rotate.

[0011] The one-way gear includes an outer half gear, which is installed on one side of the clockwork barrel. A second ratchet is installed inside the outer half gear. A rotating block is installed on the clockwork shaft of the clockwork barrel. A second pawl is installed on the outer surface of the rotating block. The second pawl is engaged with the second ratchet, and a second spring is installed between the second pawl and the rotating block.

[0012] The timing device includes a hairspring mounted on a frame. A fork is mounted on one side of the hairspring, and a pallet fork is mounted on the other side of the fork. The pallet fork rotates on the frame. A seventh shaft is mounted on one side of the pallet fork, which rotates on the frame. An escape wheel, a fifth gear, and a half-bevel gear are mounted on the seventh shaft. The pallet fork meshes with the escape wheel, the fifth gear meshes with the outer half gear, and the half-bevel gear meshes with the seventh bevel gear. The outer half gear drives the fifth gear and the half-bevel gear to rotate. The fifth gear drives the seventh shaft, which in turn drives the escape wheel. The swing of the hairspring drives the fork, which in turn drives the pallet fork, which in turn drives the escape wheel to swing regularly. After a period of defrosting, the half-bevel gear meshes with the seventh bevel gear, which drives the seventh bevel gear to rotate. The seventh bevel gear drives the fifth shaft to reverse, and the fifth shaft switches the four-way reversing valve to normal operation.

[0013] A rubber block is installed at the bottom of the counterweight.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts constant temperature control technology, which can automatically adjust the fan air intake according to the temperature, thereby effectively controlling the air flow speed and heat exchange efficiency around the heat exchanger. When the temperature rises, the fan air intake is automatically increased to enhance the heat dissipation effect. When the temperature tends to be too low, the air volume is appropriately reduced to maintain heat accumulation and balance. It can effectively suppress temperature fluctuations caused by environmental changes or load fluctuations during system operation, and achieve stable control of the internal temperature of the system. 2. The present invention adopts automatic defrosting technology. When frost is detected on the surface of the external evaporator, the defrosting device is automatically activated, and the four-way reversing valve is controlled to switch the refrigerant flow direction, so that the high-temperature and high-pressure refrigerant is reversely introduced into the evaporator, thereby converting the evaporator from the original heat absorption end to the heat release end, removing the frost on the evaporator surface, improving the stable operation capability of the unit in winter or cold and humid environments, and ensuring the continuous heating performance of the heat pump system; 3. The present invention adopts automatic reset technology. After a period of defrosting, it can automatically control the four-way reversing valve to switch back to the normal operation mode, and at the same time control the reset of the defrost device to achieve continuous operation of multiple defrost cycles, significantly reducing the frequency of manual maintenance and system downtime, and improving the intelligence level and operation efficiency of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of a heat pump air conditioning unit according to the present invention; Figure 2 is a perspective view of the constant temperature control device of the present invention; Figure 3 is a perspective view of the defrosting device of the present invention; Figure 4Schematic diagram of the internal structure of the detection device of the present invention; Figure 5 is a perspective view of the locking device of the present invention; Figure 6 is a perspective view of the driving device of the present invention; Figure 7 is a perspective view of the reset device of the present invention; Figure 8 is a perspective view of a one-way gear of the present invention; Figure 9 It is a perspective view of the timing device of the present invention.

[0016] In the figure: 1. frame; 2. constant temperature control device; 21. filter; 22. movable plate; 23. fixed plate; 24. first bevel gear; 25. second bevel gear; 26. first gear; 27. fixed block; 28. first rack; 3. evaporator; 4. defrost device; 41. detection device; 411. detection housing; 412. second gear; 413. track; 414. detection head; 415. second rack; 42. locking device; 421. first support block; 422. first pinion; 423. second support block; 424. first belt; 425. third bevel gear; 426. fourth bevel gear; 427. third gear; 428. third rack; 429. first pawl; 43. driving device; 431. third support block; 432. first ratchet ; 433, turntable; 434, counterweight; 435, third pinion; 436, second belt; 437, fourth support block; 438, half gear; 44, reset device; 441, fourth gear; 442, fifth bevel gear; 443, barrel; 444, one-way gear; 4441, outer half gear; 4442, second ratchet; 4443, rotating block; 4444, second pawl; 445, sixth bevel gear; 446, timing device; 4461, hairspring; 4462, fork; 4463, escapement fork; 4464, escapement wheel; 4465, fifth gear; 4466, half bevel gear; 447, seventh bevel gear; 448, bracket; 449, four-way reversing valve; 5, electrical cabinet; 6, condenser; 7, compressor; 8, expansion valve. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example: Figures 1-9As shown, the present invention provides a technical solution. The heat pump air-conditioning unit includes a frame 1, a control shell is installed above the frame 1, a constant temperature control device 2 is installed inside the control shell, an evaporator 3 is installed below the constant temperature control device 2, a defrost device 4 is installed on one side of the evaporator 3, an electrical cabinet 5 is installed below the evaporator 3, a condenser 6 and a compressor 7 are installed on one side of the electrical cabinet 5, an expansion valve 8 is installed on one side of the compressor 7, the evaporator 3, the defrost device 4, the electrical cabinet 5, the condenser 6, the compressor 7 and the expansion valve 8 are installed inside the frame 1, and the evaporator 3, the electrical cabinet 5, the condenser 6, the compressor 7 and the expansion valve 8 are connected to the control system.

[0019] When the heat pump air conditioner is cooling, the refrigerant in the condenser 6 absorbs heat in the room and evaporates. The refrigerant vapor passes through the four-way reversing valve 449 and enters the compressor 7. The compressor 7 raises the refrigerant vapor from low pressure to high pressure. The high-pressure refrigerant vapor enters the evaporator 3 to condense and release heat. The fan takes away the heat released by the refrigerant. The high-pressure refrigerant enters the expansion valve 8. The expansion valve 8 throttles the refrigerant from high pressure to low pressure, and the low-pressure refrigerant returns to the condenser 6. When the heat pump air conditioner is heating, the fan introduces external heat into the evaporator 3. The refrigerant in the evaporator 3 absorbs heat and evaporates. The refrigerant vapor passes through the four-way reversing valve 449 and enters the compressor 7. The compressor 7 raises the refrigerant vapor from low pressure to high pressure. The high-pressure refrigerant vapor enters the condenser 6 to condense and release heat, transferring the heat to the room. The high-pressure refrigerant enters the expansion valve 8. The expansion valve 8 throttles the refrigerant from high pressure to low pressure, and the low-pressure refrigerant returns to the evaporator 3.

[0020] The constant temperature control device 2 includes a filter 21, which is installed inside the control shell. A movable plate 22 is installed below the filter 21, and a fixed plate 23 is installed below the movable plate 22. A first rotating shaft is installed on the movable plate 22, and a first bevel gear 24 is installed on one side of the first rotating shaft. A support plate is installed on the first rotating shaft, and a second rotating shaft is installed on one side of the support plate. A second bevel gear 25 and a first gear 26 are installed on the second rotating shaft. The first bevel gear 24 and the second bevel gear 25 are meshed. A fixed block 27 is installed on the inner wall of the control shell, and a first rack 28 is slidably connected to the inside of the fixed block 27. A bimetallic block is installed on one side of the first rack 28, and the bimetallic block is installed inside the fixed block 27. The first gear 26 and the first rack 28 are meshed. A fan is installed below the fixed block 27, and the fan is connected to the control system.

[0021] When the temperature rises, the bimetallic block bends and drives the first rack 28 to slide in the fixed block 27. The first rack 28 slides in the direction away from the fixed block 27. The first rack 28 drives the first gear 26 to rotate, and the first gear 26 drives the second rotating shaft to rotate. The second rotating shaft drives the second bevel gear 25 to rotate. The second bevel gear 25 drives the first bevel gear 24 to rotate. The first bevel gear 24 drives the first rotating shaft to rotate. The first rotating shaft drives the movable plate 22 to rotate, increasing the air intake of the fan. When the temperature drops, the bimetallic block recovers and drives the first rack 28 back to its initial position. The first rack 28 drives the first gear 26 to reverse. The first gear 26 drives the second rotating shaft to reverse. The second rotating shaft drives the second bevel gear 25 to reverse. The second bevel gear 25 drives the first bevel gear 24 to reverse. The first bevel gear 24 drives the first rotating shaft to reverse. The first rotating shaft drives the movable plate 22 to reverse back to its initial position.

[0022] The defrosting device 4 includes a locking device 42 , a rotating rod is mounted on the locking device 42 , a detecting device 41 is mounted on the rotating rod, a driving device 43 is mounted on one side of the locking device 42 , and a resetting device 44 is mounted on one side of the driving device 43 .

[0023] The detection device 41 includes a detection shell 411, which rotates on the rotating rod. A second gear 412 is installed inside the detection shell 411, and the second gear 412 is installed on the rotating rod. A track 413 is installed inside the detection shell 411, and a detection head 414 is slidably connected inside the track 413. One side of the detection head 414 is against the surface of the evaporator 3. A cylinder is installed on one side of the detection head 414, and a first spring is sleeved on the outer surface of the cylinder. One side of the first spring is installed in the track 413, and the other side of the first spring is installed on the detection head 414. A second rack 415 is installed on one side of the cylinder, and the second rack 415 is engaged with the second gear 412.

[0024] When frost forms on the surface of the evaporator 3, the frost layer drives the detection head 414 to slide in the track 413, and the detection head 414 moves away from the evaporator 3. The detection head 414 drives the cylinder to move, and the cylinder drives the second rack 415 to move, and the second rack 415 drives the second gear 412 to rotate, and the second gear 412 drives the rotating rod to rotate. When the frost on the surface of the evaporator 3 is removed, the first spring stretches and drives the cylinder to slide in the track 413, and the cylinder moves toward the evaporator 3. The cylinder drives the second rack 415 to move, and the second rack 415 drives the second gear 412 to reverse, and the second gear 412 drives the rotating rod to reverse.

[0025] The locking device 42 includes a first support block 421, which is mounted on the frame 1, and the rotating rod rotates on the first support block 421. A first pinion 422 is mounted on the rotating rod, and a second support block 423 is mounted on the frame 1. One side of the second support block 423 is rotatably connected to the second pinion, and a first belt 424 is mounted on the first pinion 422 and the second pinion. A third bevel gear 425 is mounted on one side of the second pinion. The frame 1 is rotatably connected to the third rotating shaft, and a fourth bevel gear 426 and a third gear 427 are mounted on the third rotating shaft. The third bevel gear 425 and the fourth bevel gear 426 are meshed. A third rack 428 is slidably connected to the frame 1, and the third gear 427 and the third rack 428 are meshed. A first pawl 429 is mounted on one side of the third rack 428.

[0026] The rotating rod drives the first pinion 422 to rotate, the first pinion 422 drives the first belt 424 to rotate, the first belt 424 drives the second pinion to rotate, the second pinion drives the third bevel gear 425 to rotate, the third bevel gear 425 drives the fourth bevel gear 426 to rotate, the fourth bevel gear 426 drives the third rotating shaft to rotate, the third rotating shaft drives the third gear 427 to rotate, the third gear 427 drives the third rack 428 to slide on the frame 1, the third rack 428 slides in the direction away from the first supporting block 421, the third rack 428 drives the first pawl 429 to move, and the first pawl 429 disengages from the first ratchet 432. When the evaporator 3 is turned on the surface When the frost on the surface is removed, the rotating rod drives the first pinion 422 to reverse, the first pinion 422 drives the first belt 424 to reverse, the first belt 424 drives the second pinion to reverse, the second pinion drives the third bevel gear 425 to reverse, the third bevel gear 425 drives the fourth bevel gear 426 to reverse, the fourth bevel gear 426 drives the third rotating shaft to reverse, the third rotating shaft drives the third gear 427 to reverse, the third gear 427 drives the third rack 428 to slide on the frame 1, the third rack 428 slides in the direction close to the first support block 421, the third rack 428 drives the first pawl 429 to move, and the first pawl 429 rests on the first ratchet 432.

[0027] The driving device 43 includes a third support block 431, which is installed on the frame 1. The third support block 431 is rotatably connected to the fourth support block 431, and the first ratchet 432, the turntable 433 and the third pinion 435 are installed on the fourth shaft. The first ratchet 432 and the first pawl 429 are engaged. A counterweight block 434 is installed on the turntable 433, and a rubber block is installed at the bottom of the counterweight block 434. A fourth support block 437 is installed on the frame 1. The fourth support block 437 is rotatably connected to the fifth shaft. One side of the fifth shaft is installed on the reset device 44, and the other side of the fifth shaft is installed with the fourth pinion and the half gear 438. The second belt 436 is installed on the third pinion 435 and the fourth pinion.

[0028] When the first pawl 429 disengages from the first ratchet 432, the counterweight 434 descends and drives the turntable 433 to rotate, the turntable 433 drives the fourth shaft to rotate, the fourth shaft drives the third pinion 435 to rotate, the third pinion 435 drives the second belt 436 to rotate, the second belt 436 drives the fourth pinion to rotate, the fourth pinion drives the fifth shaft to rotate, the fifth shaft drives the piston shaft and the half gear 438 of the four-way reversing valve 449 to rotate, the four-way reversing valve 449 will switch the refrigerant flow direction, so that the high-temperature and high-pressure refrigerant is reversely introduced into the evaporator 3, thereby changing the evaporator 3 from the original heat absorption end to the heat release end, and removing the frost on the surface of the evaporator 3. When the frost is removed, the fifth shaft drives the fourth pinion to rotate, the fourth pinion drives the second belt 436 to rotate, the second belt 436 drives the third pinion 435 to rotate, the third pinion 435 drives the fourth shaft to rotate, the fourth shaft drives the turntable 433 to rotate, and the turntable 433 drives the counterweight 434 to rise back to the initial position.

[0029] The reset device 44 includes a fourth gear 441, one side of the fourth support block 437 is rotatably connected to the sixth rotating shaft, the fourth gear 441 is mounted on the sixth rotating shaft, and a fifth bevel gear 442 is mounted on one side of the sixth rotating shaft. A spring barrel 443 is mounted on the frame 1, and a one-way gear 444 and a sixth bevel gear 445 are mounted on the spring shaft of the spring barrel 443. The fifth bevel gear 442 and the sixth bevel gear 445 are engaged with each other. A timing device 446 is mounted on one side of the spring barrel 443, and a bracket 448 is mounted above the timing device 446. A four-way reversing valve 449 is mounted on the bracket 448. The fifth rotating shaft is mounted on the piston shaft of the four-way reversing valve 449, and a seventh bevel gear 447 is mounted on the fifth rotating shaft.

[0030] The half gear 438 drives the fourth gear 441 to rotate, the fourth gear 441 drives the sixth rotating shaft to rotate, the sixth rotating shaft drives the fifth bevel gear 442 to rotate, the fifth bevel gear 442 drives the sixth bevel gear 445 to rotate, the sixth bevel gear 445 drives the clockwork shaft of the clockwork box 443 to rotate, tighten the clockwork, the clockwork shaft drives the rotating block 4443 to rotate, the rotating block 4443 drives the second pawl 4444 to slide on the second ratchet 4442, when the half gear 438 and the fourth gear 441 are disengaged, the clockwork drives the clockwork shaft to rotate, the clockwork shaft drives the rotating block 4443 to rotate, the rotating block 4443 drives the second pawl 4444 to drive the second ratchet 4442 to rotate, and the second ratchet 4442 drives the outer half gear 4441 to rotate.

[0031] The one-way gear 444 includes an outer half gear 4441, which is installed on one side of the spring box 443. A second ratchet 4442 is installed inside the outer half gear 4441. A rotating block 4443 is installed on the spring shaft of the spring box 443. A second pawl 4444 is installed on the outer surface of the rotating block 4443. The second pawl 4444 is engaged with the second ratchet 4442, and a second spring is installed between the second pawl 4444 and the rotating block 4443.

[0032] The timing device 446 includes a hairspring 4461, which is mounted on the frame 1. A fork 4462 is mounted on one side of the hairspring 4461, and a pallet fork 4463 is mounted on one side of the fork 4462. The pallet fork 4463 rotates on the frame 1. A seventh rotating shaft is mounted on one side of the pallet fork 4463, which rotates on the frame 1. The seventh rotating shaft is mounted on the seventh rotating shaft. An escapement wheel 4464, a fifth gear 4465 and a half-bevel gear 4466 are mounted on the seventh rotating shaft. The pallet fork 4463 and the escapement wheel 4464 are meshed, the fifth gear 4465 and the outer half gear 4441 are meshed, and the half-bevel gear 4466 and the seventh bevel gear 447 are meshed. The outer half gear 4441 drives the fifth gear 4465 and the half bevel gear 4466 to rotate, the fifth gear 4465 drives the seventh shaft to rotate, the seventh shaft drives the escapement wheel 4464 to rotate, the spring wheel 4461 swings and drives the fork head 4462 to swing, the fork head 4462 drives the escapement fork 4463 to swing, the escapement fork 4463 drives the escapement wheel 4464 to swing regularly, after defrosting for a period of time, the half bevel gear 4466 and the seventh bevel gear 447 enter into meshing, the half bevel gear 4466 drives the seventh bevel gear 447 to rotate, the seventh bevel gear 447 drives the fifth shaft to reverse, and the fifth shaft drives the four-way reversing valve 449 to switch to normal operation mode.

[0033] Working principle of the present invention: When the heat pump air conditioner is cooling, the refrigerant in the condenser 6 absorbs heat in the room and evaporates. The refrigerant vapor passes through the four-way reversing valve 449 and enters the compressor 7. The compressor 7 raises the refrigerant vapor from low pressure to high pressure. The high-pressure refrigerant vapor enters the evaporator 3 to condense and release heat. The fan takes away the heat released by the refrigerant. The high-pressure refrigerant enters the expansion valve 8. The expansion valve 8 throttles the refrigerant from high pressure to low pressure, and the low-pressure refrigerant returns to the condenser 6. When the heat pump air conditioner is heating, the fan introduces external heat into the evaporator 3. The refrigerant in the evaporator 3 absorbs heat and evaporates. The refrigerant vapor passes through the four-way reversing valve 449 and enters the compressor 7. The compressor 7 raises the refrigerant vapor from low pressure to high pressure. The high-pressure refrigerant vapor enters the condenser 6 to condense and release heat, transferring the heat to the room. The high-pressure refrigerant enters the expansion valve 8. The expansion valve 8 throttles the refrigerant from high pressure to low pressure, and the low-pressure refrigerant returns to the evaporator 3.

[0034] When the temperature rises, the bimetallic block bends and drives the first rack 28 to slide in the fixed block 27, and the first rack 28 slides in the direction away from the fixed block 27, and the first rack 28 drives the first gear 26 to rotate, and the first gear 26 drives the second rotating shaft to rotate, and the second rotating shaft drives the second bevel gear 25 to rotate, and the second bevel gear 25 drives the first bevel gear 24 to rotate, and the first bevel gear 24 drives the first rotating shaft to rotate, and the first rotating shaft drives the movable plate 22 to rotate, thereby increasing the air intake of the fan. When the temperature drops, the bimetallic block recovers and drives the first rack 28 back to its initial position, and the first rack 28 drives the first gear 26 to reverse, and the first gear 26 drives the second rotating shaft to reverse, and the second rotating shaft drives the second bevel gear 25 to reverse, and the second bevel gear 25 drives the first bevel gear 24 to reverse, and the first bevel gear 24 drives the first rotating shaft to reverse, and the first rotating shaft drives the movable plate 22 to reverse back to its initial position, thereby reducing the air intake of the fan, thereby effectively suppressing the temperature fluctuations caused by environmental changes or load fluctuations during system operation, thereby achieving stable control of the internal temperature of the system.

[0035] When frost forms on the surface of the evaporator 3, the frost layer drives the detection head 414 to slide in the track 413, and the detection head 414 moves in the direction away from the evaporator 3. The detection head 414 drives the cylinder to move, and the cylinder drives the second rack 415 to move. The second rack 415 drives the second gear 412 to rotate, and the second gear 412 drives the rotating rod to rotate. The rotating rod drives the first pinion 422 to rotate, and the first pinion 422 drives the first belt 424 to rotate. The first belt 424 drives the second pinion to rotate, and the second pinion drives the third bevel gear 425 to rotate. The third bevel gear 425 drives the fourth bevel gear 426 to rotate, and the fourth bevel gear 426 drives the third rotating shaft to rotate. The third rotating shaft drives the third gear 427 to rotate, and the third gear 427 drives the third rack 428 to slide on the frame 1, and the third rack 428 slides in the direction away from the first supporting block 421. The third rack 428 drives the first pawl 429 to move, and the first pawl 429 disengages from the first ratchet 432.

[0036] When the first pawl 429 disengages from the first ratchet 432, the counterweight 434 descends and drives the rotary disk 433 to rotate, the rotary disk 433 drives the fourth shaft to rotate, the fourth shaft drives the third pinion 435 to rotate, the third pinion 435 drives the second belt 436 to rotate, the second belt 436 drives the fourth pinion to rotate, the fourth pinion drives the fifth shaft to rotate, the fifth shaft drives the piston shaft and the half gear 438 of the four-way reversing valve 449 to rotate, and the four-way reversing valve 449 switches the refrigerant flow direction, so that the high-temperature and high-pressure refrigerant is reversely introduced into the evaporator 3. In the process, the evaporator 3 is transformed from the original heat absorption end to the heat release end, and the frost on the surface of the evaporator 3 is removed. At this time, the half gear 438 drives the fourth gear 441 to rotate, the fourth gear 441 drives the sixth shaft to rotate, the sixth shaft drives the fifth bevel gear 442 to rotate, the fifth bevel gear 442 drives the sixth bevel gear 445 to rotate, the sixth bevel gear 445 drives the spring shaft of the spring box 443 to rotate, tighten the spring, the spring shaft drives the rotating block 4443 to rotate, and the rotating block 4443 drives the second pawl 4444 to slide on the second ratchet 4442.

[0037] When the counterweight 434 drops to the lowest point, the half gear 438 and the fourth gear 441 are disengaged, the mainspring drives the mainspring shaft to rotate, the mainspring shaft drives the rotating block 4443 to rotate, the rotating block 4443 drives the second pawl 4444 to drive the second ratchet 4442 to rotate, the second ratchet 4442 drives the outer half gear 4441 to rotate, the outer half gear 4441 drives the fifth gear 4465 to rotate and the half bevel gear 4466 to rotate, the fifth gear 4465 drives the seventh rotating shaft to rotate, and the seventh rotating shaft The shaft drives the escapement wheel 4464 to rotate, the hairspring wheel 4461 swings to drive the fork head 4462 to swing, the fork head 4462 drives the escapement fork 4463 to swing, and the escapement fork 4463 drives the escapement wheel 4464 to swing regularly. After defrosting for a period of time, the semi-bevel gear 4466 and the seventh bevel gear 447 enter into meshing, the semi-bevel gear 4466 drives the seventh bevel gear 447 to rotate, the seventh bevel gear 447 drives the fifth shaft to reverse, and the fifth shaft drives the four-way reversing valve 449 to switch to normal operation mode.

[0038] When the frost on the surface of the evaporator 3 is removed, the first spring stretches and drives the cylinder to slide in the track 413, and the cylinder moves in the direction close to the evaporator 3. The cylinder drives the second rack 415 to move, and the second rack 415 drives the second gear 412 to reverse, and the second gear 412 drives the rotating rod to reverse, and the rotating rod drives the first pinion 422 to reverse, and the first pinion 422 drives the first belt 424 to reverse, and the first belt 424 drives the second pinion to reverse, and the second pinion drives the third bevel gear 425 to reverse, and the third bevel gear 425 drives the fourth bevel gear 426 to reverse, and the fourth bevel gear 426 drives the third rotating shaft to reverse, and the third rotating shaft drives the third gear 427 to reverse, and the third gear 427 drives the third rack 428 to slide on the frame 1, and the third rack 428 slides in the direction close to the first support block 421, and the third rack 428 drives the first pawl 429 to move, and the first pawl 429 rests on the first ratchet 432.

[0039] When the first pawl 429 locks the first ratchet 432, the fifth shaft drives the fourth pinion to rotate, the fourth pinion drives the second belt 436 to rotate, the second belt 436 drives the third pinion 435 to rotate, the third pinion 435 drives the fourth shaft to rotate, the fourth shaft drives the turntable 433 to rotate, and the turntable 433 drives the counterweight 434 to rise back to its initial position.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A heat pump air conditioning unit with constant temperature control function, characterized in that: The heat pump air-conditioning unit comprises a frame (1), a control housing is installed above the frame (1), a constant temperature control device (2) is installed inside the control housing, an evaporator (3) is installed below the constant temperature control device (2), a defrosting device (4) is installed on one side of the evaporator (3), an electrical cabinet (5) is installed below the evaporator (3), a condenser (6) and a compressor (7) are installed on one side of the electrical cabinet (5), an expansion valve (8) is installed on one side of the compressor (7), the evaporator (3), the defrosting device (4), the electrical cabinet (5), the condenser (6), the compressor (7) and the expansion valve (8) are installed inside the frame (1), and the evaporator (3), the electrical cabinet (5), the condenser (6), the compressor (7) and the expansion valve (8) are connected to a control system.

2. A heat pump air conditioning unit with constant temperature control function according to claim 1, characterized in that: The constant temperature control device (2) includes a filter (21), which is installed inside the control housing; a movable plate (22) is installed below the filter (21); a fixed plate (23) is installed below the movable plate (22); a first rotating shaft is installed on the movable plate (22); a first bevel gear (24) is installed on one side of the first rotating shaft; a support plate is installed on the first rotating shaft; a second rotating shaft is installed on one side of the support plate; a second bevel gear (25) and a first gear (26) are installed on the second rotating shaft; the first bevel gear (24) and the second bevel gear (25) are meshed; a fixed block (27) is installed on the inner wall of the control housing; a first rack (28) is slidably connected to the inside of the fixed block (27); a bimetallic block is installed on one side of the first rack (28); the bimetallic block is installed inside the fixed block (27); the first gear (26) and the first rack (28) are meshed; a fan is installed below the fixed block (27); the fan is connected to the control system.

3. A heat pump air conditioning unit with constant temperature control function according to claim 2, characterized in that: The defrosting device (4) comprises a locking device (42), a rotating rod is mounted on the locking device (42), a detecting device (41) is mounted on the rotating rod, a driving device (43) is mounted on one side of the locking device (42), and a resetting device (44) is mounted on one side of the driving device (43).

4. A heat pump air conditioning unit with constant temperature control function according to claim 3, characterized in that: The detection device (41) includes a detection housing (411), the detection housing (411) rotates on a rotating rod, a second gear (412) is installed inside the detection housing (411), and the second gear (412) is installed on the rotating rod, a track (413) is installed inside the detection housing (411), a detection head (414) is slidably connected inside the track (413), one side of the detection head (414) is against the surface of the evaporator (3), a cylinder is installed on one side of the detection head (414), the outer surface of the cylinder is sleeved with a first spring, one side of the first spring is installed in the track (413), and the other side of the first spring is installed on the detection head (414), a second rack (415) is installed on one side of the cylinder, and the second rack (415) is meshed with the second gear (412).

5. A heat pump air conditioning unit with constant temperature control function according to claim 4, characterized in that: The locking device (42) includes a first support block (421), the first support block (421) is mounted on the frame (1), the rotating rod rotates on the first support block (421), a first pinion (422) is mounted on the rotating rod, a second support block (423) is mounted on the frame (1), one side of the second support block (423) is rotatably connected to a second pinion, a first belt (424) is mounted on the first pinion (422) and the second pinion, and the second A third bevel gear (425) is installed on one side of the pinion gear, a third rotating shaft is rotatably connected to the frame (1), a fourth bevel gear (426) and a third gear (427) are installed on the third rotating shaft, the third bevel gear (425) and the fourth bevel gear (426) are meshed, a third rack (428) is slidably connected to the frame (1), the third gear (427) and the third rack (428) are meshed, and a first pawl (429) is installed on one side of the third rack (428).

6. A heat pump air conditioning unit with constant temperature control function according to claim 5, characterized in that: The driving device (43) includes a third support block (431), the third support block (431) is mounted on the frame (1), a fourth rotating shaft is rotatably connected to the third support block (431), a first ratchet (432), a rotating disk (433) and a third pinion (435) are mounted on the fourth rotating shaft, the first ratchet (432) and the first pawl (429) are meshed, a counterweight (434) is mounted on the rotating disk (433), a fourth support block (437) is mounted on the frame (1), a fifth rotating shaft is rotatably connected to the fourth support block (437), one side of the fifth rotating shaft is mounted on the reset device (44), a fourth pinion and a half gear (438) are mounted on the other side of the fifth rotating shaft, and a second belt (436) is mounted on the third pinion (435) and the fourth pinion.

7. A heat pump air conditioning unit with constant temperature control function according to claim 6, characterized in that: The reset device (44) includes a fourth gear (441), one side of the fourth support block (437) is rotatably connected to a sixth rotating shaft, the fourth gear (441) is mounted on the sixth rotating shaft, and a fifth bevel gear (442) is mounted on one side of the sixth rotating shaft. A clockwork box (443) is mounted on the frame (1), a one-way gear (444) and a sixth bevel gear (445) are mounted on the clockwork shaft of the clockwork box (443), and the fifth bevel gear (442) and the sixth bevel gear (445) are meshed. A timing device (446) is mounted on one side of the clockwork box (443), a bracket (448) is mounted above the timing device (446), a four-way reversing valve (449) is mounted on the bracket (448), the fifth rotating shaft is mounted on the piston shaft of the four-way reversing valve (449), and a seventh bevel gear (447) is mounted on the fifth rotating shaft.

8. A heat pump air conditioning unit with constant temperature control function according to claim 7, characterized in that: The one-way gear (444) includes an outer half gear (4441), which is mounted on one side of a clockwork box (443). A second ratchet (4442) is mounted inside the outer half gear (4441). A rotating block (4443) is mounted on the clockwork shaft of the clockwork box (443). A second pawl (4444) is mounted on the outer surface of the rotating block (4443). The second pawl (4444) is engaged with the second ratchet (4442), and a second spring is mounted between the second pawl (4444) and the rotating block (4443).

9. A heat pump air conditioning unit with constant temperature control function according to claim 8, characterized in that: The timing device (446) includes a hairspring (4461), the hairspring (4461) is mounted on the frame (1), a fork (4462) is mounted on one side of the hairspring (4461), a pallet fork (4463) is mounted on one side of the fork (4462), the pallet fork (4463) rotates on the frame (1), a seventh rotating shaft is mounted on one side of the pallet fork (4463), the seventh rotating shaft rotates on the frame (1), an escapement wheel (4464), a fifth gear (4465) and a semi-bevel gear (4466) are mounted on the seventh rotating shaft, the pallet fork (4463) and the escapement wheel (4464) are meshed, the fifth gear (4465) and the outer semi-gear (4441) are meshed, and the semi-bevel gear (4466) and the seventh bevel gear (447) are meshed.

10. A heat pump air conditioning unit with constant temperature control function according to claim 9, characterized in that: A rubber block is installed at the bottom of the counterweight block (434).

Images