Air conditioner defrosting device and defrosting method thereof

Abstract

The invention discloses an air conditioner defrosting device and a defrosting method thereof, and particularly relates to the technical field of air conditioner defrosting, the air conditioner defrosting device comprises an air conditioner outdoor unit outer frame and an expansion valve, a condenser is fixedly installed in the air conditioner outdoor unit outer frame, the condenser comprises cooling fins, a first pipe fitting and a second pipe fitting are arranged in the cooling fins, and the first pipe fitting and the second pipe fitting are arranged in the air conditioner outdoor unit outer frame. A compressor is fixedly installed on the inner side of the air conditioner outdoor unit outer frame, a four-way valve is arranged on an output port of the compressor, and a defrosting mechanism is arranged among the compressor, the four-way valve, the expansion valve and the condenser. And one part of the two channels is used for carrying out auxiliary heating and defrosting on the radiating fins by the high-temperature and high-pressure gaseous refrigerant, and the other part of the two channels is used for continuously supplying heat to a room, so that the indoor temperature cannot be reduced due to defrosting, and the using effect of the whole air conditioner is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to air conditioner defrosting technology field, specifically to an air conditioner defrosting device and a defrosting method thereof. BACKGROUND

[0002] When the air conditioner operates in winter, frost will form on the surface of the outdoor evaporator due to the low temperature environment, which will isolate the frozen coil from the air, making the heat exchange poor, resulting in a decrease in the heating efficiency of the air conditioner. Long-term frost will increase the burden of the compressor, which may cause mechanical damage or shorten the service life of the air conditioner. Therefore, air conditioner defrosting operation is needed. Traditional air conditioner defrosting is mostly through system reverse cycle defrosting: when the outdoor unit is frosted, the air conditioner temporarily stops heating, the four-way valve is reversed, and the system enters the "cooling mode" (at this time, the indoor unit stops heat dissipation, and the outdoor unit becomes a condenser). The refrigerant is liquefied and heat is released in the outdoor condenser, so that the temperature of the evaporator (which temporarily serves as a condenser) surface rises, and the frost layer melts. Or use electric auxiliary defrosting: install electric heating wire or heating pipe near the outdoor evaporator, and directly heat when defrosting to melt the frost layer. However, the traditional air conditioner defrosting method still has some problems in actual use: using system reverse cycle to melt the frost layer on the condenser will lower the indoor temperature and increase the overall energy consumption, affecting the overall use effect. Therefore, we propose an air conditioner defrosting device and a defrosting method to solve the above problems. SUMMARY

[0003] The purpose of the present application is to provide an air conditioner defrosting device and a defrosting method to solve the problems raised in the background.

[0004] To achieve the above purpose, the present application provides the following technical scheme: an air conditioner defrosting device, comprising an air conditioner outdoor frame and an expansion valve, the air conditioner outdoor frame is fixedly installed with a condenser, the condenser comprises a heat dissipation fin, the heat dissipation fin is provided with a first pipe and a second pipe, the inner side of the air conditioner outdoor frame is fixedly installed with a compressor, the output port of the compressor is provided with a four-way valve, and the compressor, the four-way valve, the expansion valve and the condenser are provided with a defrosting mechanism, and the outer side of the heat dissipation fin is provided with an auxiliary defrosting mechanism. The first pipe comprises a plurality of first L-shaped copper pipes vertically distributed, first connecting pipes are fixedly connected between adjacent two first L-shaped copper pipes, and the plurality of first L-shaped copper pipes are fixedly clamped in the heat dissipation fin. The second pipe comprises a plurality of second L-shaped copper pipes vertically distributed, second connecting pipes are fixedly connected between adjacent two second L-shaped copper pipes, and the plurality of second L-shaped copper pipes are fixedly clamped in the heat dissipation fin.

[0005] As a preferred technical scheme of the present application, the defrosting mechanism comprises a three-way valve and a fifth branch pipe, the three-way valve is provided with a first branch pipe near one end of a four-way valve, the top end of the four-way valve is provided as an agent inlet valve end, the end of the first branch pipe and the agent inlet valve end are fixedly installed, the three-way valve is provided with a second branch pipe away from one end of the first branch pipe, the second branch pipe is provided with a third branch pipe away from one end of the three-way valve, the third branch pipe is provided with a fourth branch pipe away from one end of the second branch pipe, the end of the fourth branch pipe and the end of the second L-shaped copper pipe at the bottom position of the second pipe are fixedly installed, one end of the fifth branch pipe and the end of the second L-shaped copper pipe at the top position of the second pipe are fixedly installed, the other end of the fifth branch pipe is fixedly installed with a three-way pipe, the three-way pipe is fixedly installed with a seventh branch pipe away from one end of the fifth branch pipe, the bottom end of the four-way valve is provided with a first valve end, a second valve end and a third valve end, the third valve end is located between the first valve end and the second valve end, the second valve end and the end of the seventh branch pipe are fixedly installed, the other end of the three-way pipe away from the fifth branch pipe is fixedly installed with an eighth branch pipe, the eighth branch pipe is provided with a ninth branch pipe away from one end of the three-way pipe, the end of the ninth branch pipe and the end of the first L-shaped copper pipe at the bottom position of the first pipe are fixedly installed, the third branch pipe, the fourth branch pipe and the eighth branch pipe, the ninth branch pipe are provided with a flow control piece, the top end of the fifth branch pipe is provided with a sixth branch pipe, one end of the sixth branch pipe and the end of the first L-shaped copper pipe at the top position of the first pipe are fixedly installed, the other end of the sixth branch pipe and one end of the expansion valve are fixedly installed.

[0006] As a preferred technical scheme of the present application, the three-way valve comprises a valve frame, the bottom of the valve frame is integrally formed with a first flow-through pipe, the side end of the valve frame is integrally formed with a second flow-through pipe, the side end of the valve frame away from the second flow-through pipe is integrally formed with a third flow-through pipe, a movable valve ball is movably arranged in the valve frame, the middle of the valve ball is integrally formed with a horizontal rotating shaft, the horizontal rotating shaft is rotatably arranged in the middle of the valve frame, a first T-shaped groove is formed in the valve ball, a first motor is fixedly installed on the outside of the valve frame, the driving end of the first motor and the shaft end of the horizontal rotating shaft are fixedly installed.

[0007] As a preferred technical scheme of the present application, the discharge port of the compressor is provided with a discharge pipe, the agent inlet port of the compressor is provided with an agent inlet pipe, the end of the agent inlet pipe and the end of the third valve end are fixedly installed.

[0008] As a preferred technical scheme of the present application, the three-way valve is fixedly installed through the end of the first flow-through pipe and the top end of the discharge pipe, the three-way valve is fixedly installed through the end of the second flow-through pipe and the end of the first branch pipe, the three-way valve is fixedly installed through the third flow-through pipe and the end of the second branch pipe.

[0009] As a preferred technical scheme of the present application, the flow control piece comprises a bottom control, the top end of the bottom control is provided with a top control, the bottom control comprises a flow control outer frame, the side end of the flow control outer frame is integrally formed with a first flow control pipe, the side end of the flow control outer frame away from the first flow control pipe is integrally formed with a second flow control pipe, the middle part of the flow control outer frame is integrally formed with a third flow control pipe, a flow control inner ball is movably clamped in the flow control outer frame, a second T-shaped groove is formed in the flow control inner ball, the middle part of the flow control inner ball is integrally formed with a longitudinal rotating shaft, the longitudinal rotating shaft is rotatably installed on the flow control outer frame, the structure of the top control is the same as that of the bottom control, a communication elbow is fixedly installed between the third flow control pipes in the bottom control and the top control, the longitudinal rotating shafts in the bottom control and the top control are coaxially fixedly installed, a second motor is fixedly installed at the top end of the flow control outer frame in the top control, and the driving end of the second motor and the top end of the longitudinal rotating shaft in the top control are fixedly installed.

[0010] As a preferred technical scheme of the present application, the flow control piece is fixedly installed through the end of the first flow control pipe in the bottom control and the end of the fourth branch pipe, the flow control piece is fixedly installed through the end of the second flow control pipe in the bottom control and the end of the third branch pipe, the flow control piece is fixedly installed through the end of the first flow control pipe in the top control and the end of the ninth branch pipe, and the flow control piece is fixedly installed through the end of the second flow control pipe in the top control and the end of the eighth branch pipe.

[0011] As a preferred technical scheme of the present application, the end of the first valve end is connected with an indoor unit evaporator.

[0012] As a preferred technical scheme of the present application, the auxiliary removing mechanism comprises an L-shaped middle frame, the L-shaped middle frame is located on the inner side of the heat dissipation fin, a plurality of pulse fans are fixedly installed on the L-shaped middle frame and are uniformly distributed, the two end parts of the L-shaped middle frame are each provided with a first longitudinal frame, the two end parts of the L-shaped middle frame are respectively slidably installed on the corresponding first longitudinal frames, an electric heating piece is fixedly installed on the inner side of the L-shaped middle frame, an L-shaped baffle is arranged on the outer side of the L-shaped middle frame, the L-shaped baffle is located on the outer side of the heat dissipation fin, the two end parts of the L-shaped baffle are each provided with a second longitudinal frame, the two end parts of the L-shaped baffle are respectively slidably installed on the corresponding second longitudinal frames, a lifting cylinder is fixedly installed on the inner side of each of the first longitudinal frame and the second longitudinal frame, the driving end of the lifting cylinder is fixedly installed on the end part of the corresponding L-shaped middle frame and L-shaped baffle, and a mounting base is fixedly installed between two adjacent second longitudinal frames.

[0013] A defrosting method of a defrosting device of an air conditioner, comprising the following steps: Step one, in the initial state, the plurality of pulse fans, the electric heating piece and the L-shaped baffle are located at the inner side bottom position of the air conditioner outdoor unit outer frame, and do not affect the heat dissipation fan in the air conditioner outdoor unit blowing to the condenser for heat dissipation when the air conditioner is used for cooling in summer. In the initial state, the first T-shaped channel communicates the first flow pipe and the second flow pipe, the second T-shaped channel in the bottom control and the top control communicates the third flow control pipe and the first flow control pipe, and the third flow control pipe in the bottom control and the top control communicates through the communication elbow pipe, thereby communicating the first pipe and the second pipe at the head and tail ends; When heating, the compressor sucks in low-temperature and low-pressure gaseous refrigerant and compresses it into high-temperature and high-pressure gaseous refrigerant, which is guided into the four-way valve through the discharge pipe, the first flow pipe, the second flow pipe, the first branch pipe and the inlet valve end to change the flow direction, so that the high-temperature and high-pressure gaseous refrigerant flows to the indoor unit evaporator through the first valve end to condense and liquefy the refrigerant, release heat to heat the indoor air, and pass through the expansion valve to reduce the pressure, so that the normal-temperature and high-pressure liquid refrigerant becomes low-temperature and low-pressure liquid refrigerant, which is guided into the first pipe and the second pipe in the outdoor unit condenser through the sixth branch pipe, the refrigerant absorbs outdoor heat through the first pipe and the second pipe, evaporates and vaporizes into low-temperature and low-pressure gaseous refrigerant, does not affect the normal heat absorption of the outdoor unit condenser, and the low-temperature and low-pressure gaseous refrigerant is guided into the four-way valve through the fifth branch pipe, the seventh branch pipe and the second valve end to flow back to the compressor to perform a new round of heating; Step two, when the condenser appears frost, the first motor is started to drive the horizontal rotating shaft and the inner valve ball to rotate, so that the first T-shaped channel communicates the first flow pipe, the second flow pipe and the third flow pipe, at the same time, the second motor is started to drive the vertical rotating shaft and the flow control inner ball in the bottom control and the top control to rotate synchronously, so that the second T-shaped channel communicates the first flow control pipe and the second flow control pipe in the bottom control and the top control, and the first pipe and the second pipe are disconnected to form two channels; Step three, a part of the high-temperature and high-pressure gaseous refrigerant compressed by the compressor can be guided into the second pipe through the third flow pipe, the second branch pipe, the third branch pipe, the first flow control pipe and the second flow control pipe in the bottom control, the fourth branch pipe to assist in heating and defrosting the heat dissipation fins, at the same time, the main channel continues to supply heat to the indoor, ensuring that the indoor temperature does not decrease due to defrosting, and the gaseous refrigerant after auxiliary heating and defrosting of the heat dissipation fins is guided into the four-way valve through the fifth branch pipe, the three-way pipe, the seventh branch pipe and the second valve end to flow back to the compressor to perform a new round of heating, at the same time, the low-temperature and low-pressure liquid refrigerant is guided into the first pipe in the outdoor unit condenser through the sixth branch pipe, the refrigerant continues to absorb outdoor heat through the first pipe, evaporates and vaporizes into low-temperature and low-pressure gaseous refrigerant, does not affect the normal heat absorption of the outdoor unit condenser, and the low-temperature and low-pressure gaseous refrigerant is guided into the four-way valve through the ninth branch pipe, the first flow control pipe and the second flow control pipe in the top control, the eighth branch pipe, the three-way pipe, the seventh branch pipe and the second valve end to flow back to the compressor to perform a new round of heating; While defrosting the condenser of the air conditioner outdoor unit, the electric heating element can be turned on, and multiple pulse air blowers can be turned on at the same time, the multiple pulse air blowers generate pulse hot air flow to blow to the condenser, and multiple lifting air cylinders are turned on at the same time, driving multiple pulse air blowers and electric heating elements and L-shaped baffles to reciprocatingly lift, so that the condenser heat dissipation fins are reciprocatingly lifted for auxiliary heating defrosting, accelerating the melting and falling of the frost layer, shortening the defrosting time, improving the defrosting efficiency, and at the same time, the pulse air flow can also dry the water on the surface of the evaporator, reducing the possibility of re-frosting. By setting the L-shaped baffle, the loss of heat in the pulse hot air flow passing through the heat dissipation fins in the condenser is reduced, and the multiple pulse air blowers and electric heating elements and L-shaped baffles can be lifted to a certain height position to position and auxiliary heat defrosting of the condenser at a certain position, further accelerating the melting and falling of the frost layer.

[0014] Compared with the prior art, the beneficial effects of the present application are: 1. By setting the defrosting mechanism, whether the first pipe and the second pipe are communicated is flexibly controlled, so as to form a single channel for normal heat absorption, or form two channels, one part of which performs auxiliary heating defrosting on the heat dissipation fins by high-temperature and high-pressure gaseous refrigerant, and the other part continues to supply heat to the room, so as to ensure that the indoor temperature does not decrease due to defrosting, thereby improving the use effect of the entire air conditioner.

[0015] 2. By setting the auxiliary defrosting mechanism, the heat dissipation fins in the condenser can be reciprocatingly lifted for auxiliary heating defrosting, accelerating the melting and falling of the frost layer, shortening the defrosting time, improving the defrosting efficiency, and at the same time, the pulse air flow can also dry the water on the surface of the evaporator, reducing the possibility of re-frosting. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The structure of the present application is shown in the figure.

[0018] Figure 2 The structure of the present application is shown in the figure.

[0019] Figure 3 The connection of the structure of the present application is shown in the figure.

[0020] Figure 4 The connection of the structure of the present application is shown in the figure.

[0021] Figure 5 It is a structure schematic view of the three-way valve in the application.

[0022] Figure 6 It is a structure schematic view of the control flow part in the application.

[0023] Figure 7 It is a structure schematic view of the auxiliary defrosting mechanism in the application.

[0024] In the figure: 1, outer frame of air conditioner outdoor unit; 11, compressor; 111, discharge pipe opening; 112, inlet pipe opening; 12, four-way valve; 121, inlet valve end; 122, first valve end; 123, second valve end; 124, third valve end; 13, expansion valve; 2, heat dissipation fin; 3, first pipe part; 31, first L-shaped copper pipe; 32, first connecting pipe; 4, second pipe part; 41, second L-shaped copper pipe; 42, second connecting pipe; 5, defrosting mechanism; 6, auxiliary defrosting mechanism; 51, three-way valve part; 52, first branch pipe; 53, second branch pipe; 54, third branch pipe; 541, fourth branch pipe; 55, fifth branch pipe; 551, sixth branch pipe; 552, seventh branch pipe; 553, three-way pipe; 56, eighth branch pipe; 561, ninth branch pipe; 57, control flow part; 511, valve frame; 512, first flow-through pipe; 513, second flow-through pipe; 514, third flow-through pipe; 515, inner valve ball; 5151, first T-shaped through groove; 516, horizontal rotating shaft; 517, first motor; 571, bottom control part; 572, top control part; 573, control flow outer frame; 574, first control flow pipe; 575, third control flow pipe; 576, second control flow pipe; 577, control flow inner ball; 5771, second T-shaped through groove; 578, vertical rotating shaft; 579, communication elbow; 5710, second motor; 61, L-shaped middle frame; 611, pulse air blower; 62, first vertical frame; 63, electric heating part; 64, L-shaped baffle; 65, second vertical frame; 601, lifting air cylinder; 66, mounting base. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0026] Embodiment: as Figures 1-7As shown, the air conditioner defrosting device provided by the application comprises an air conditioner outer frame 1 and an expansion valve 13, the air conditioner outer frame 1 is fixedly installed with a condenser, the condenser comprises heat dissipation fins 2, the heat dissipation fins 2 are provided with first pipe fittings 3 and second pipe fittings 4, the inner side of the air conditioner outer frame 1 is fixedly installed with a compressor 11, the output port of the compressor 11 is provided with a four-way valve 12, the compressor 11, the four-way valve 12, the expansion valve 13 and the condenser are provided with a defrosting mechanism 5, and the outer side of the heat dissipation fins 2 is provided with an auxiliary defrosting mechanism 6. The first pipe fittings 3 comprise a plurality of first L-shaped copper pipes 31 vertically distributed, first connecting pipes 32 are fixedly connected between adjacent two first L-shaped copper pipes 31, and the plurality of first L-shaped copper pipes 31 are fixedly clamped in the heat dissipation fins 2; the second pipe fittings 4 comprise a plurality of second L-shaped copper pipes 41 vertically distributed, second connecting pipes 42 are fixedly connected between adjacent two second L-shaped copper pipes 41, and the plurality of second L-shaped copper pipes 41 are fixedly clamped in the heat dissipation fins 2.

[0027] The top end of the four-way valve 12 is provided with an agent inlet valve end 121, the bottom end of the four-way valve 12 is provided with a first valve end 122, a second valve end 123 and a third valve end 124, and the third valve end 124 is located between the first valve end 122 and the second valve end 123.

[0028] The agent outlet port of the compressor 11 is provided with an agent outlet pipe port 111, the agent inlet port of the compressor 11 is provided with an agent inlet pipe port 112, the end of the agent inlet pipe port 112 is fixedly installed with the end of the third valve end 124, the end of the first valve end 122 is connected with an indoor unit evaporator, the indoor unit evaporator condenses and liquefies refrigerant, releases heat to heat indoor air, and changes normal-temperature high-pressure liquid refrigerant into low-temperature low-pressure liquid refrigerant through throttling pressure reduction of the expansion valve 13.

[0029] The defrosting mechanism 5 comprises a three-way valve 51 and a fifth branch pipe 55. The first branch pipe 52 is arranged at one end of the three-way valve 51 close to the four-way valve 12. The end of the first branch pipe 52 is fixedly installed with the inlet valve end 121. The second branch pipe 53 is arranged at the other end of the three-way valve 51 away from the first branch pipe 52. The end of the second branch pipe 53 is fixedly installed with the third branch pipe 54. The end of the third branch pipe 54 away from the second branch pipe 53 is fixedly installed with the fourth branch pipe 541. The end of the fourth branch pipe 541 is fixedly installed with the end of the second L-shaped copper pipe 41 at the bottom position in the second pipe 4. The end of the fifth branch pipe 55 is fixedly installed with the end of the second L-shaped copper pipe 41 at the top position in the second pipe 4. The other end of the fifth branch pipe 55 is fixedly installed with a three-way pipe 553. The end of the three-way pipe 553 away from the fifth branch pipe 55 is fixedly installed with a seventh branch pipe 552. The second valve end 123 is fixedly installed with the end of the seventh branch pipe 552. The other end of the three-way pipe 553 away from the fifth branch pipe 55 is fixedly installed with an eighth branch pipe 56. The eighth branch pipe 56 is provided with a ninth branch pipe 561 at one end away from the three-way pipe 553. The end of the ninth branch pipe 561 is fixedly installed with the end of the first L-shaped copper pipe 31 at the bottom position in the first pipe 3. The third branch pipe 54, the fourth branch pipe 541, the eighth branch pipe 56 and the ninth branch pipe 561 are provided with a flow control piece 57. The top end of the fifth branch pipe 55 is provided with a sixth branch pipe 551. The end of the sixth branch pipe 551 is fixedly installed with the end of the first L-shaped copper pipe 31 at the top position in the first pipe 3. The other end of the sixth branch pipe 551 is fixedly installed with one end of the expansion valve 13.

[0030] The three-way valve 51 comprises a valve frame 511. The bottom of the valve frame 511 is integrally formed with a first flow pipe 512. The side end of the valve frame 511 is integrally formed with a second flow pipe 513. The side end of the valve frame 511 away from the second flow pipe 513 is integrally formed with a third flow pipe 514. An inner valve ball 515 is movably clamped in the valve frame 511. The middle of the inner valve ball 515 is integrally formed with a horizontal rotating shaft 516. The horizontal rotating shaft 516 is rotatably installed in the middle of the valve frame 511. A first T-shaped groove 5151 is formed in the inner valve ball 515. In the initial state, the first T-shaped groove 5151 communicates the first flow pipe 512 and the second flow pipe 513. The compressor 11 sucks in low-temperature and low-pressure gaseous refrigerant and compresses it into high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant is guided into the four-way valve 12 through the discharge pipe 111, the first flow pipe 512, the second flow pipe 513, the first branch pipe 52 and the inlet valve end 121. The flow direction is changed so that the high-temperature and high-pressure gaseous refrigerant flows to the indoor unit evaporator refrigerant condensate to be liquefied. Heat is released to heat the indoor air. The outer side of the valve frame 511 is fixedly installed with a first motor 517. The driving end of the first motor 517 is fixedly installed with the shaft end of the horizontal rotating shaft 516.

[0031] The three-way valve 51 is fixedly installed through the end of the first flow pipe 512 and the top end of the agent discharge pipe 111, the three-way valve 51 is fixedly installed through the end of the second flow pipe 513 and the end of the first branch pipe 52, and the three-way valve 51 is fixedly installed through the third flow pipe 514 and the end of the second branch pipe 53.

[0032] The flow control member 57 comprises a bottom control member 571, the top end of the bottom control member 571 is provided with a top control member 572, the bottom control member 571 comprises a flow control outer frame 573, the side end of the flow control outer frame 573 is integrally formed with a first flow control pipe 574, the side end of the flow control outer frame 573 away from the first flow control pipe 574 is integrally formed with a second flow control pipe 576, the middle part of the flow control outer frame 573 is integrally formed with a third flow control pipe 575, and the flow control outer frame 573 movably clamps a flow control inner ball 577, and a second T-shaped through groove 5771 is formed in the flow control inner ball 577, and in the initial state, the second T-shaped through groove 5771 communicates the third flow control pipe 575 and the first flow control pipe 574; The middle part of the flow control inner ball 577 is integrally formed with a vertical rotating shaft 578, the vertical rotating shaft 578 is rotatably installed on the flow control outer frame 573, the structure of the top control member 572 is the same as that of the bottom control member 571, and the third flow control pipe 575 in the bottom control member 571 and the top control member 572 is fixedly installed with a communication elbow 579, so as to communicate the third flow control pipe 575 in the top control member 572 and the bottom control member 571, and thus the first pipe member 3 and the second pipe member 4 are communicated at the head end; In subsequent heating, low-temperature and low-pressure liquid refrigerant is introduced into the first pipe member 3 and the second pipe member 4 in the outdoor unit condenser through the sixth branch pipe 551, the refrigerant widely absorbs outdoor heat through the first pipe member 3 and the second pipe member 4, and is evaporated into low-temperature and low-pressure gaseous refrigerant, without affecting the normal heat absorption of the outdoor unit condenser, and the low-temperature and low-pressure gaseous refrigerant is introduced into the four-way valve 12 through the fifth branch pipe 55, the seventh branch pipe 552 and the second valve end 123 to guide the low-temperature and low-pressure gaseous refrigerant to flow back to the compressor 11; The vertical rotating shaft 578 in the bottom control member 571 and the top control member 572 is fixedly installed coaxially, the top end of the flow control outer frame 573 in the top control member 572 is fixedly installed with a second motor 5710, and the driving end of the second motor 5710 and the top end of the vertical rotating shaft 578 in the top control member 572 are fixedly installed; The flow control member 57 is fixedly installed through the end of the first flow control pipe 574 in the bottom control member 571 and the end of the fourth branch pipe 541, the flow control member 57 is fixedly installed through the end of the second flow control pipe 576 in the bottom control member 571 and the end of the third branch pipe 54, the flow control member 57 is fixedly installed through the end of the first flow control pipe 574 in the top control member 572 and the end of the ninth branch pipe 561, and the flow control member 57 is fixedly installed through the end of the second flow control pipe 576 in the top control member 572 and the end of the eighth branch pipe 56.

[0033] The auxiliary defrosting mechanism 6 comprises an L-shaped middle frame 61 located on the inner side of the heat dissipation fins 2, a plurality of pulse fans 611 uniformly distributed and fixedly installed on the L-shaped middle frame 61, first longitudinal frames 62 provided at both ends of the L-shaped middle frame 61, the two ends of the L-shaped middle frame 61 being slidingly installed on the corresponding first longitudinal frames 62 respectively, an electric heating element 63 fixedly installed on the inner side of the L-shaped middle frame 61, an L-shaped baffle 64 provided on the outer side of the L-shaped middle frame 61, the plurality of pulse fans 611, the electric heating element 63 and the L-shaped baffle 64 being located at the inner side bottom position of the air conditioner outdoor unit outer frame 1 in the initial state, not affecting the heat dissipation fan in the air conditioner outdoor unit blowing to the condenser for heat dissipation when the air conditioner is cooling in summer, second longitudinal frames 65 provided at both ends of the L-shaped baffle 64, the two ends of the L-shaped baffle 64 being slidingly installed on the corresponding second longitudinal frames 65 respectively, lifting air cylinders 601 fixedly installed on the inner sides of the first longitudinal frames 62 and the second longitudinal frames 65, the driving ends of the lifting air cylinders 601 being fixedly installed on the ends of the corresponding L-shaped middle frame 61 and L-shaped baffle 64, and a mounting base 66 fixedly installed between the two adjacent second longitudinal frames 65 and on the air conditioner outdoor unit outer frame 1, the electric heating element 63 being turned on at the same time as the defrosting operation of the condenser of the air conditioner outdoor unit, the plurality of pulse fans 611 being turned on at the same time, the pulse hot air flow generated by the plurality of pulse fans 611 blowing to the condenser, and a plurality of lifting air cylinders 601 being turned on at the same time, driving the plurality of pulse fans 611, the electric heating element 63 and the L-shaped baffle 64 to reciprocatingly lift, so as to reciprocatingly lift the heat dissipation fins 2 in the condenser, accelerate the melting and falling of the frost layer, shorten the defrosting time, improve the defrosting efficiency, and at the same time, the pulse air flow can also dry the water on the surface of the evaporator, reducing the possibility of re-frosting. By setting the L-shaped baffle 64, the loss of heat in the pulse hot air flow passing through the heat dissipation fins 2 in the condenser is reduced, and the plurality of pulse fans 611, the electric heating element 63 and the L-shaped baffle 64 can also be lifted to a certain height position to position and defrost a certain position of the condenser, further accelerating the melting and falling of the frost layer.

[0034] A defrosting method of an air conditioner defrosting device, comprising the following steps: Step one, in the initial state, the plurality of pulse fans 611, the electric heating element 63 and the L-shaped baffle 64 are located at the inner side bottom position of the air conditioner outdoor unit outer frame 1, not affecting the heat dissipation fan in the air conditioner outdoor unit blowing to the condenser for heat dissipation when the air conditioner is cooling in summer. In the initial state, the first T-shaped through slot 5151 is in communication with the first flow-through pipe 512 and the second flow-through pipe 513, the second T-shaped through slot 5771 in the bottom control 571 and the top control 572 is in communication with the third flow control pipe 575 and the first flow control pipe 574, and the third flow control pipe 575 in the top control 572 and the bottom control 571 is in communication through the communication elbow 579, so that the first pipe fitting 3 and the second pipe fitting 4 are in communication at the head and tail ends. When heating, the compressor 11 sucks in low-temperature and low-pressure gaseous refrigerant and compresses it into high-temperature and high-pressure gas, which is guided into the four-way valve 12 through the discharge pipe 111, the first flow-through pipe 512, the second flow-through pipe 513, the first branch pipe 52, and the inlet valve end 121, changes the flow direction, and makes the high-temperature and high-pressure gaseous refrigerant flow to the indoor unit evaporator through the first valve end 122, condenses and liquefies, releases heat, heats the indoor air, and is throttled and decompressed by the expansion valve 13 to change the normal-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure liquid. The low-temperature and low-pressure liquid refrigerant is guided into the first pipe fitting 3 and the second pipe fitting 4 in the outdoor unit condenser through the sixth branch pipe 551, and the refrigerant is widely absorbed by the first pipe fitting 3 and the second pipe fitting 4 to evaporate into low-temperature and low-pressure gaseous refrigerant, without affecting the normal heat absorption of the outdoor unit condenser. The low-temperature and low-pressure gaseous refrigerant is guided into the four-way valve 12 through the fifth branch pipe 55, the seventh branch pipe 552, and the second valve end 123, and flows back to the compressor 11 through the third valve end 124 to guide the low-temperature and low-pressure gaseous refrigerant and perform a new round of heating. Step two, when the condenser is frosted, the first motor 517 is started to drive the horizontal rotating shaft 516 and the inner valve ball 515 to rotate, so that the first T-shaped through slot 5151 is in communication with the first flow-through pipe 512, the second flow-through pipe 513, and the third flow-through pipe 514. At the same time, the second motor 5710 is started to drive the bottom control 571 and the top control 572 to rotate synchronously, so that the second T-shaped through slot 5771 is in communication with the first flow control pipe 574 and the second flow control pipe 576 in the bottom control 571 and the top control 572, and the first pipe fitting 3 and the second pipe fitting 4 are disconnected to form two channels. Step three, part of the high temperature and high pressure gaseous refrigerant compressed by the compressor 11 can be introduced into the second pipe fitting 4 through the third flow pipe 514, the second branch pipe 53, the third branch pipe 54, the first flow control pipe 574 in the bottom control 571, the second flow control pipe 576, the fourth branch pipe 541 to assist heating and defrosting the heat dissipation fins 2, at the same time, the main channel continues to supply heat to the room to ensure that the indoor temperature does not decrease due to defrosting, and the gaseous refrigerant after the heat dissipation fins 2 are assisted to heat and defrost is introduced into the four-way valve 12 through the fifth branch pipe 55, the three-way pipe 553, the seventh branch pipe 552 and the second valve end 123 to guide the low temperature and low pressure gaseous refrigerant to flow back to the compressor 11 for a new round of heating, at the same time, the low temperature and low pressure liquid refrigerant is introduced into the first pipe fitting 3 in the outdoor unit condenser through the sixth branch pipe 551, the refrigerant continues to absorb outdoor heat through the first pipe fitting 3, evaporates and vaporizes into low temperature and low pressure gaseous refrigerant, which does not affect the normal heat absorption of the outdoor unit condenser, and the low temperature and low pressure gaseous refrigerant is introduced into the four-way valve 12 through the ninth branch pipe 561, the first flow control pipe 574 in the top control 572, the second flow control pipe 576, the eighth branch pipe 56, the three-way pipe 553, the seventh branch pipe 552 and the second valve end 123 to guide the low temperature and low pressure gaseous refrigerant to flow back to the compressor 11 for a new round of heating; While defrosting the condenser of the air conditioner outdoor unit, the electric heating element 63 can be turned on, and at the same time, multiple pulse blowers 611 are turned on, the pulse hot air flow generated by the multiple pulse blowers 611 blows towards the condenser, and at the same time, multiple lifting cylinders 601 are turned on to drive the multiple pulse blowers 611, the electric heating element 63 and the L-shaped baffle 64 to reciprocatingly lift and lower, so as to reciprocatingly lift and lower the heat dissipation fins 2 in the condenser for auxiliary heating and defrosting, accelerate the melting and falling of the frost layer, shorten the defrosting time and improve the defrosting efficiency, at the same time, the pulse air flow can also dry the water on the surface of the evaporator to reduce the possibility of re-frosting; Among them, by setting the L-shaped baffle 64, the heat loss of the pulse hot air flow passing through the heat dissipation fins 2 in the condenser is reduced, and the multiple pulse blowers 611, the electric heating element 63 and the L-shaped baffle 64 can also be lifted to a certain height position to position and auxiliary heat and defrost a certain position of the condenser, further accelerating the melting and falling of the frost layer.

[0035] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A defrosting device for an air conditioner, comprising an air conditioner outdoor unit frame (1) and an expansion valve (13), characterized in that: The air conditioner outdoor unit outer frame (1) is fixedly installed with a condenser, the condenser comprises heat dissipation fins (2), the heat dissipation fins (2) are provided with first pipe fittings (3) and second pipe fittings (4), the inner side of the air conditioner outdoor unit outer frame (1) is fixedly installed with a compressor (11), the output port of the compressor (11) is provided with a four-way valve (12), the compressor (11), four-way valve (12) and expansion valve (13) and condenser are provided with defrosting mechanism (5), the outer side of the heat dissipation fins (2) is provided with auxiliary defrosting mechanism (6); The first pipe fittings (3) comprise a plurality of first L-shaped copper pipes (31) vertically distributed, first connecting pipes (32) are fixedly connected between every two adjacent first L-shaped copper pipes (31), and the plurality of first L-shaped copper pipes (31) are fixedly clamped in the heat dissipation fins (2), the second pipe fittings (4) comprise a plurality of second L-shaped copper pipes (41) vertically distributed, second connecting pipes (42) are fixedly connected between every two adjacent second L-shaped copper pipes (41), and the plurality of second L-shaped copper pipes (41) are fixedly clamped in the heat dissipation fins (2).

2. A defrosting apparatus for an air conditioner according to claim 1, wherein: The defrosting mechanism (5) includes a three-way valve (51) and a fifth branch pipe (55), the first branch pipe (52) is arranged at one end of the three-way valve (51) close to the four-way valve (12), the top end of the four-way valve (12) is arranged as an inlet valve end (121), the end of the first branch pipe (52) and the inlet valve end (121) are fixedly installed, the second branch pipe (53) is arranged at one end of the three-way valve (51) away from the first branch pipe (52), the third branch pipe (54) is arranged at one end of the second branch pipe (53) away from the three-way valve (51), the fourth branch pipe (541) is arranged at one end of the third branch pipe (54) away from the second branch pipe (53), the end of the fourth branch pipe (541) and the end of the second L-shaped copper pipe (41) at the bottom position in the second pipe piece (4) are fixedly installed, one end of the fifth branch pipe (55) and the end of the second L-shaped copper pipe (41) at the top position in the second pipe piece (4) are fixedly installed, the three-way pipe (553) is fixedly installed at the other end of the fifth branch pipe (55), the seventh branch pipe (552) is fixedly installed at one end of the three-way pipe (553) away from the fifth branch pipe (55), the bottom end of the four-way valve (12) is provided with a first valve end (122), a second valve end (123) and a third valve end (124), the third valve end (124) is located between the first valve end (122) and the second valve end (123), the end of the second valve end (123) and the seventh branch pipe (552) are fixedly installed, the eighth branch pipe (56) is fixedly installed at the other end of the three-way pipe (553) away from the fifth branch pipe (55), the ninth branch pipe (561) is arranged at one end of the eighth branch pipe (56) away from the three-way pipe (553), the end of the ninth branch pipe (561) and the end of the first L-shaped copper pipe (31) at the bottom position in the first pipe piece (3) are fixedly installed, the control flow piece (57) is arranged between the third branch pipe (54), the fourth branch pipe (541) and the eighth branch pipe (56), the ninth branch pipe (561), the sixth branch pipe (551) is arranged at the top end of the fifth branch pipe (55), one end of the sixth branch pipe (551) and the end of the first L-shaped copper pipe (31) at the top position in the first pipe piece (3) are fixedly installed, the other end of the sixth branch pipe (551) and one end of the expansion valve (13) are fixedly installed.

3. A defrosting apparatus for an air conditioner according to claim 2, wherein: The three-way valve piece (51) comprises a valve frame (511), the bottom of the valve frame (511) is integrally formed with a first flow pipe (512), the side end of the valve frame (511) is integrally formed with a second flow pipe (513), the side end of the valve frame (511) away from the second flow pipe (513) is integrally formed with a third flow pipe (514), an inner valve ball (515) is movably clamped in the valve frame (511), the middle part of the inner valve ball (515) is integrally formed with a horizontal rotating shaft (516), the horizontal rotating shaft (516) is rotatably installed in the middle part of the valve frame (511), a first T-shaped groove (5151) is formed in the inner valve ball (515), a first motor (517) is fixedly installed on the outside of the valve frame (511), and the driving end of the first motor (517) and the shaft end of the horizontal rotating shaft (516) are fixedly installed.

4. A defrosting apparatus for an air conditioner according to claim 3, wherein: The discharge port of the compressor (11) is provided with a discharge port (111), the inlet port of the compressor (11) is provided with an inlet port (112), and the end of the inlet port (112) and the end of the third valve end (124) are fixedly installed.

5. A defrosting apparatus for an air conditioner according to claim 4, wherein: The three-way valve piece (51) is fixedly installed through the end of the first flow pipe (512) and the top end of the discharge port (111), the three-way valve piece (51) is fixedly installed through the end of the second flow pipe (513) and the end of the first branch pipe (52), and the three-way valve piece (51) is fixedly installed through the third flow pipe (514) and the end of the second branch pipe (53).

6. A defrosting apparatus for an air conditioner according to claim 5, wherein: The flow control piece (57) comprises a bottom control (571), and the top end of the bottom control (571) is provided with a top control (572); The bottom control (571) comprises a flow control outer frame (573), the side end of the flow control outer frame (573) is integrally formed with a first flow control pipe (574), the side end of the flow control outer frame (573) away from the first flow control pipe (574) is integrally formed with a second flow control pipe (576), the middle part of the flow control outer frame (573) is integrally formed with a third flow control pipe (575), a flow control inner ball (577) is movably clamped in the flow control outer frame (573), a second T-shaped groove (5771) is formed in the flow control inner ball (577), and a vertical rotating shaft (578) is integrally formed in the middle part of the flow control inner ball (577). The top control (572) is the same in structure as the bottom control (571), the bottom control (571) and the top control (572) are fixedly installed with a communication elbow (579) between the third flow control pipes (575), the vertical rotating shafts (578) in the bottom control (571) and the top control (572) are coaxially fixedly installed, and the top end of the flow control outer frame (573) in the top control (572) is fixedly installed with a second motor (5710), and the driving end of the second motor (5710) and the top end of the vertical rotating shaft (578) in the top control (572) are fixedly installed.

7. A defrosting apparatus for an air conditioner as defined in claim 6, wherein: The flow control piece (57) is fixedly installed through the end of the first flow control pipe (574) in the bottom control (571) and the end of the fourth branch pipe (541), the flow control piece (57) is fixedly installed through the end of the second flow control pipe (576) in the bottom control (571) and the end of the third branch pipe (54), the flow control piece (57) is fixedly installed through the end of the first flow control pipe (574) in the top control (572) and the end of the ninth branch pipe (561), and the flow control piece (57) is fixedly installed through the end of the second flow control pipe (576) in the top control (572) and the end of the eighth branch pipe (56).

8. A defrosting apparatus for an air conditioner according to claim 7, wherein: The end of the first valve end (122) is connected with the indoor unit evaporator.

9. A defrosting apparatus for an air conditioner as defined in claim 8, wherein: The auxiliary removing mechanism (6) comprises an L-shaped middle frame (61) located on the inner side of the heat dissipation fin (2), a plurality of pulse fans (611) fixedly installed on the L-shaped middle frame (61) and uniformly distributed, first vertical frames (62) provided at the two ends of the L-shaped middle frame (61), the two ends of the L-shaped middle frame (61) being respectively slidably installed on the corresponding first vertical frames (62), an electric heating element (63) fixedly installed on the inner side of the L-shaped middle frame (61), an L-shaped baffle (64) provided on the outer side of the L-shaped middle frame (61), second vertical frames (65) provided at the two ends of the L-shaped baffle (64), the two ends of the L-shaped baffle (64) being respectively slidably installed on the corresponding second vertical frames (65), lifting air cylinders (601) fixedly installed on the inner sides of the first vertical frames (62) and the second vertical frames (65), the driving ends of the lifting air cylinders (601) being fixedly installed at the ends of the corresponding L-shaped middle frame (61) and L-shaped baffle (64), and a mounting base (66) fixedly installed between the two adjacent second vertical frames (65) and on the air conditioner outdoor unit outer frame (1).

10. A defrosting method using the defrosting apparatus of the air conditioner according to claim 9, characterized by, The method comprises the following steps: In the initial state, the plurality of pulse fans (611), the electric heating element (63) and the L-shaped baffle (64) are located at the inner bottom position of the air conditioner outdoor unit outer frame (1) and do not affect the heat dissipation fan in the air conditioner outdoor unit blowing to the condenser for heat dissipation when the air conditioner is used for cooling in summer. In the initial state, the first T-shaped through groove (5151) communicates the first flow-through pipe (512) and the second flow-through pipe (513), the second T-shaped through groove (5771) in the bottom control (571) and the top control (572) communicates the third flow control pipe (575) and the first flow control pipe (574), and the third flow control pipe (575) in the top control (572) and the bottom control (571) is communicated through the communication elbow pipe (579), so that the first pipe fitting (3) and the second pipe fitting (4) are communicated at the first end and the tail end. In the initial state, the plurality of pulse fans (611), the electric heating element (63) and the L-shaped baffle (64) are located at the inner bottom position of the air conditioner outdoor unit outer frame (1) and do not affect the heat dissipation fan in the air conditioner outdoor unit blowing to the condenser for heat dissipation when the air conditioner is used for cooling in summer. When heating, the compressor (11) sucks in low-temperature and low-pressure gaseous refrigerant and compresses it into high-temperature and high-pressure gas, which is guided into the four-way valve (12) through the discharge pipe (111), the first flow pipe (512), the second flow pipe (513), the first branch pipe (52) and the inlet valve end (121), changes the flow direction, and makes the high-temperature and high-pressure gas flow to the indoor unit evaporator through the first valve end (122), so that the high-temperature and high-pressure gas is condensed and liquefied to release heat and heat the indoor air, and the constant-temperature and high-pressure liquid refrigerant is changed into low-temperature and low-pressure liquid through the expansion valve (13), and the low-temperature and low-pressure liquid refrigerant is guided into the first pipe (3) and the second pipe (4) in the outdoor unit condenser through the sixth branch pipe (551), and the refrigerant is evaporated into low-temperature and low-pressure gas by absorbing a large amount of outdoor heat through the first pipe (3) and the second pipe (4), without affecting the normal heat absorption of the outdoor unit condenser, and the low-temperature and low-pressure gas is guided into the four-way valve (12) through the fifth branch pipe (55), the seventh branch pipe (552) and the second valve end (123), and the low-temperature and low-pressure gas is guided back to the compressor (11) through the third valve end (124) to perform a new round of heating. Step two, when the condenser is frosted, the first motor (517) is started to drive the horizontal rotating shaft (516) and the inner valve ball (515) to rotate, so that the first T-shaped groove (5151) is connected with the first flow pipe (512), the second flow pipe (513) and the third flow pipe (514), at the same time, the second motor (5710) is started to drive the bottom control (571) and the top control (572) to rotate synchronously, so that the second T-shaped groove (5771) is connected with the first flow pipe (512), the second flow pipe (513) and the third flow pipe (514), and the first pipe (3) and the second pipe (4) are disconnected to form two channels. Step three, part of the high-temperature and high-pressure gaseous refrigerant compressed by the compressor (11) can be introduced into the second pipe fitting (4) through the third flow pipe (514), the second branch pipe (53), the third branch pipe (54), the first flow control pipe (574) and the second flow control pipe (576) in the bottom control (571), the fourth branch pipe (541), to assist in heating and defrosting the heat dissipation fins (2), at the same time, the main channel continues to heat the room, to ensure that the indoor temperature will not decrease due to defrosting, and the gaseous refrigerant after the heat dissipation fins (2) are assisted in heating and defrosting is introduced into the four-way valve (12) through the fifth branch pipe (55), the three-way pipe (553), the seventh branch pipe (552) and the second valve end (123), to guide the low-temperature and low-pressure gaseous refrigerant to flow back to the compressor (11) for a new round of heating, at the same time, the low-temperature and low-pressure liquid refrigerant is introduced into the first pipe fitting (3) in the outdoor unit condenser through the sixth branch pipe (551), the refrigerant continues to absorb outdoor heat through the first pipe fitting (3), and evaporates into low-temperature and low-pressure gaseous refrigerant, without affecting the normal heat absorption of the outdoor unit condenser, the low-temperature and low-pressure gaseous refrigerant is introduced into the four-way valve (12) through the ninth branch pipe (561), the first flow control pipe (574) and the second flow control pipe (576) in the top control (572), the eighth branch pipe (56), the three-way pipe (553), the seventh branch pipe (552) and the second valve end (123), to guide the low-temperature and low-pressure gaseous refrigerant to flow back to the compressor (11) for a new round of heating; While defrosting the condenser of the air conditioner outdoor unit, the electric heating element (63) can be turned on, and at the same time, multiple pulse blowers (611) are turned on, the pulse hot air flow generated by the multiple pulse blowers (611) blows towards the condenser, and multiple lifting cylinders (601) are turned on at the same time, to drive the multiple pulse blowers (611), the electric heating element (63) and the L-shaped baffle (64) to reciprocate up and down, so as to reciprocate up and down the heat dissipation fins (2) in the condenser for auxiliary heating and defrosting, accelerate the melting and falling of the frost layer, shorten the defrosting time, and improve the defrosting efficiency, at the same time, the pulse air flow can also dry the water on the surface of the evaporator, reducing the possibility of re-frosting; Among them, by setting the L-shaped baffle (64), the heat loss of the pulse hot air flow passing through the heat dissipation fins (2) in the condenser is reduced, and the multiple pulse blowers (611), the electric heating element (63) and the L-shaped baffle (64) can also be lifted to a certain height position to position and auxiliary heat defrosting of the condenser at a certain position, further accelerating the melting and falling of the frost layer.

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