Defrosting control method of air source heat pump and air source heat pump

Abstract

The invention relates to the technical field of air source heat pumps, in particular to a defrosting control method of an air source heat pump and the air source heat pump, the air source heat pump comprises an evaporator, a condenser, a compressor, an expansion valve and a defrosting assembly, the evaporator is connected with the compressor, the compressor is connected with the condenser, the condenser is connected with the expansion valve, and the expansion valve is connected with the evaporator; the defrosting assembly comprises a plurality of rubber defrosting rods and a plurality of rubber defrosting protruding blocks, when it is detected that the evaporator is frosted, the rubber defrosting rods move to one side of the evaporator and move repeatedly, and meanwhile, the rubber defrosting protruding blocks are matched to scrape and clean frost on the evaporator, and therefore when the evaporator is frosted, reverse circulation is not needed, and the defrosting efficiency is improved. The indoor fan does not stop running, the heating performance of the system is prevented from being reduced, running can be changed into the frosting cleaning condition, the indoor use condition of a user is not affected, and the use experience is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air source heat pumps, and in particular to a defrosting control method of an air source heat pump and an air source heat pump. Background Art

[0002] Air source heat pump is a device that uses high-level energy to make heat flow from a low-level heat source to a high-level heat source. It has the advantages of energy saving and environmental protection. The liquid refrigerant first completes the gaseous temperature and pressure increase process, then enters the high-efficiency evaporator and releases heat energy to transfer to water. At the same time, the refrigerant cools and becomes liquid; after that, it enters the evaporator after pressure reduction and throttling by the throttling element. The liquid refrigerant absorbs heat energy and solar radiation energy in the air, and exchanges heat with water after compression and heating by the compressor to achieve the heating effect. In order to absorb heat from the surrounding air and facilitate heat dissipation and space saving, the evaporator is usually installed outdoors. However, in winter, when the air source heat pump is running, when the surface temperature of the outdoor evaporator is below zero and below the dew point temperature of the outdoor air, frost will form on the surface of the evaporator. When the frost layer reaches a certain thickness, the outdoor heat exchange efficiency will be reduced and the heat exchange performance of the unit will deteriorate.

[0003] In the prior art, a four-way valve is usually provided to change the flow direction of the refrigerant, so that the refrigerant flows in the reverse direction, thereby reversing the functions of the condenser and the evaporator of the heat pump system; when defrosting is required, the four-way valve will be reversed, so that the high-temperature and high-pressure refrigerant discharged from the compressor enters the evaporator first (which is used as a condenser at this time), and the heat of the refrigerant is used to melt the frost layer on the evaporator fins.

[0004] In the aforementioned prior art, although the four-way valve can complete defrosting through reverse circulation, the fan of the indoor unit usually stops running due to the reversal of the functions of the condenser and the evaporator during defrosting, which leads to a significant decrease in the heating performance of the system and a long defrosting process, which greatly affects the user experience. Summary of the invention

[0005] The purpose of the present invention is to provide a defrost control method and an air source heat pump for an air source heat pump, so as to solve the problem in the prior art that although the four-way valve can complete defrosting through reverse circulation, the fan of the indoor unit usually stops running due to the reversal of the functions of the condenser and the evaporator during defrosting, which leads to a significant decrease in the heating performance of the system and a long defrost process, thus greatly affecting the user experience.

[0006] To achieve the above object, the present invention provides an air source heat pump, comprising an evaporator, a condenser, a compressor, an expansion valve and a defrosting assembly, wherein the evaporator is connected to the compressor, the compressor is connected to the condenser, the condenser is connected to the expansion valve, and the expansion valve is connected to the evaporator;

[0007] The defrost assembly includes a plurality of rubber defrost rods and a plurality of rubber defrost protrusions. The plurality of rubber defrost rods are sequentially arranged on one side of the evaporator. The plurality of rubber defrost protrusions are respectively fixedly connected to the corresponding rubber defrost rods and sequentially distributed on the outside of the rubber defrost rods.

[0008] Wherein, the evaporator comprises an evaporator body and a plurality of heat sinks, and the plurality of heat sinks are sequentially arranged on the evaporation tubes of the evaporator body.

[0009] Wherein, the defrost assembly further comprises a moving adjustment unit, and the moving adjustment unit is arranged on the evaporator body;

[0010] The movable adjustment unit includes two longitudinal electric slide rails, two longitudinal sliders, a transverse electric slide rail and a transverse slider. The two longitudinal electric slide rails are symmetrically arranged on one side of the evaporator body, and the two longitudinal sliders are respectively slidably connected to the corresponding longitudinal electric slide rails. The transverse electric slide rail is arranged between the two longitudinal sliders, and the transverse slider is slidably connected to the transverse electric slide rail.

[0011] Among them, the defrost assembly also includes a defrost switching unit, which includes a camera, a temperature sensor, a supporting shell, a switching shell, two switching mechanisms, a rubber plate, a supporting plate, a plurality of first heating wires, a plurality of second heating wires, a sponge plate, a plurality of sponge strips and a plurality of microfiber strips. The supporting shell is arranged below the transverse slider, the switching shell is connected to one end of the supporting shell, the camera and the temperature sensor are arranged at the other end of the supporting shell in sequence, the two switching mechanisms are symmetrically arranged on both sides of the switching shell, the supporting plate is arranged on the two switching mechanisms and is located inside the switching shell, the rubber plate is detachably connected to one side of the supporting plate, a plurality of rubber defrost rods are arranged on the rubber plate in sequence, the sponge plate is detachably connected to the other side of the supporting plate, a plurality of sponge strips are arranged on the sponge plate in sequence, a plurality of microfiber strips are arranged on the corresponding sponge strips in sequence, a plurality of the first heating wires are arranged inside the support plate in sequence, and a plurality of the second heating wires are arranged on the inner wall of the switching shell in sequence.

[0012] Among them, the switching mechanism includes a self-locking motor, a rotating shaft, a switching electric slide rail and a switching slider, the supporting shell and the switching shell both have a slide groove, the rotating shaft and the slide groove are adapted to each other, one end of the rotating shaft is fixedly connected to the supporting plate, the other end of the rotating shaft passes through the slide groove and is fixedly connected to the output end of the self-locking motor, the switching electric slide rail is arranged on one side of the supporting shell and the switching shell, the switching slider is slidably connected to the switching electric slide rail, and the self-locking motor is fixedly connected to the switching slider.

[0013] Wherein, the defrost assembly further comprises two adsorption units, and the two adsorption units are symmetrically arranged above and below the supporting shell;

[0014] The adsorption unit comprises an adsorption shell and a first fan. The adsorption shell is arranged on the supporting shell. The first fan is arranged inside the adsorption shell. The transverse slider is fixedly connected to the adsorption shell.

[0015] Wherein, the defrosting assembly further comprises two heating units, and the two heating units are symmetrically arranged on both sides of the supporting shell;

[0016] The heating unit includes a heating shell, a plurality of third heating wires and a second fan. The heating shell is fixedly connected to the supporting shell and is located on one side of the supporting shell. The plurality of third heating wires are sequentially arranged inside the heating shell. The second fan is arranged inside the heating shell and is located on one side of the third heating wires.

[0017] The present invention also provides a defrosting control method for an air source heat pump, using the air source heat pump described above, comprising the following steps:

[0018] The longitudinal electric slide rail and the transverse electric slide rail are started to move the support housing to the vicinity of the heat sink;

[0019] The temperature sensor detects the temperature of the heat sink. When the temperature is lower than a preset value, there is a risk of frost. At this time, the camera is turned on to take a picture of the heat sink for confirmation;

[0020] After confirming the existence of frost, the switching electric slide rail is started to move the support plate in the support housing;

[0021] The plurality of rubber defrosting slide bars are inserted between the plurality of heat sinks, and move in all directions under the action of the longitudinal electric slide rail and the transverse electric slide rail to scrape off the frost, and cooperate with the rubber defrosting protrusions to improve the defrosting effect;

[0022] After defrosting is completed, the support plate moves into the switching housing, and the self-locking motor starts to drive the support plate to rotate, so that the positions of the sponge strip and the rubber defrosting rod are swapped;

[0023] The sponge strip and the plurality of microfiber strips are inserted between the plurality of heat sinks to absorb the residual moisture on the heat sinks to avoid secondary frosting;

[0024] At the same time, when the camera captures dew on the heat sink but no frost, water can be absorbed through the above operation to avoid frost.

[0025] The longitudinal electric slide rail and the transverse electric slide rail are moved in all directions to perform defrosting operations on the plurality of heat sinks in sequence.

[0026] In the defrosting control method of an air source heat pump and an air source heat pump of the present invention, air enters the evaporator, and the refrigerant exchanges heat with the surrounding air. Since the pressure in the evaporator is relatively low, the refrigerant can absorb the heat in the air and evaporate into a gaseous state, while absorbing a large amount of heat. The compressor sucks in the gaseous refrigerant and compresses it, thereby increasing its pressure and temperature, so that the refrigerant changes from a low-pressure gaseous state to a high-pressure gaseous state; at this time, the high-pressure gaseous refrigerant enters the condenser from the compressor, and in the condenser, the refrigerant exchanges heat with the cooling medium; since the pressure in the condenser is relatively high, the refrigerant can release heat and condense into a liquid state, and the high-pressure liquid refrigerant enters the expansion valve from the condenser through a pipeline, and the expansion valve throttles and reduces the pressure of the refrigerant, thereby reducing its pressure and temperature, and the refrigerant after throttling and reducing the pressure enters the evaporator again, thereby repeating the cycle;

[0027] When frost is detected on the evaporator, the rubber defrost rod moves to one side of the evaporator and moves repeatedly, and at the same time cooperates with the rubber defrost bump to scrape and clean the frost on the evaporator. Therefore, when frost appears on the evaporator, there is no need for reverse circulation, and the indoor fan will not stop running, thereby avoiding a decrease in the heating performance of the system. The frost can be cleaned instead of running, which does not affect the user's indoor use and greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a cross-sectional view of the whole of the present invention.

[0031] Figure 3 The present invention Figure 2 AA line section view.

[0032] Figure 4 It is a structural schematic diagram of the support shell of the present invention.

[0033] Figure 5 It is a front view of the support shell of the present invention.

[0034] Figure 6 The present invention Figure 2 BB line cross-sectional view.

[0035] Figure 7 It is a schematic structural diagram of the air source heat pump of the present invention.

[0036] Figure 8 It is a flow chart of the steps of the defrost control method of the air source heat pump of the present invention.

[0037] 1-evaporator, 2-condenser, 3-compressor, 4-expansion valve, 5-rubber defrost rod, 6-rubber defrost bump, 7-evaporator body, 8-heat sink, 9-longitudinal electric slide rail, 10-longitudinal slider, 11-lateral electric slide rail, 12-lateral slider, 13-camera, 14-temperature sensor, 15-support shell, 16-switching shell, 17-switching mechanism, 18-rubber plate, 19-support plate, 20-first heating wire, 21-second heating wire, 22-sponge plate, 23-sponge strip, 24-microfiber strip, 25-self-locking motor, 26-rotating shaft, 27-switching electric slide rail, 28-switching slider, 29-slide groove, 30-adsorption shell, 31-first fan, 32-heating shell, 33-third heating wire, 34-second fan. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0039] See also Figures 1 to 7 The present invention provides an air source heat pump, including an evaporator 1, a condenser 2, a compressor 3, an expansion valve 4 and a defrost assembly, wherein the defrost assembly includes a plurality of rubber defrost rods 5 and a plurality of rubber defrost protrusions 6, the evaporator 1 includes an evaporator body 7 and a plurality of heat sinks 8, the defrost assembly also includes a moving adjustment unit, the moving adjustment unit includes two longitudinal electric slide rails 9, two longitudinal sliders 10, a transverse electric slide rail 11 and a transverse slider 12, the defrost assembly also includes a defrost switching unit, the defrost switching unit includes a camera 13, a temperature sensor 14, a support shell 15 , a switching shell 16, two switching mechanisms 17, a rubber plate 18, a support plate 19, a plurality of first heating wires 20, a plurality of second heating wires 21, a sponge plate 22, a plurality of sponge strips 23 and a plurality of microfiber strips 24, the switching mechanism 17 includes a self-locking motor 25, a rotating shaft 26, a switching electric slide rail 27 and a switching slider 28, the defrost assembly also includes two adsorption units, the adsorption unit includes an adsorption shell 30 and a first fan 31, the defrost assembly also includes two heating units, the heating unit includes a heating shell 32, a plurality of third heating wires 33 and a second fan 34,

[0040] Among them, the evaporator 1 is connected to the compressor 3, the compressor 3 is connected to the condenser 2, the condenser 2 is connected to the expansion valve 4, the expansion valve 4 is connected to the evaporator 1, and multiple rubber defrost rods 5 are arranged in sequence on one side of the evaporator 1, and multiple rubber defrost bumps 6 are fixedly connected to the corresponding rubber defrost rods 5, and are distributed in sequence on the outside of the rubber defrost rods 5. Air enters the evaporator 1, and the refrigerant exchanges heat with the surrounding air. Since the pressure in the evaporator 1 is relatively low, the refrigerant can absorb heat from the air and evaporate into a gaseous state. At the same time, after absorbing a large amount of heat, the compressor 3 sucks in the gaseous refrigerant and compresses it, so that its pressure and temperature are increased, and the refrigerant changes from a low-pressure gaseous state to a high-pressure gaseous state. At this time, the high-pressure gaseous refrigerant enters the condenser 2 from the compressor 3, and in the condenser 2, the refrigerant exchanges heat with the cooling medium. Since the pressure in the condenser 2 is relatively high, the refrigerant can release heat and condense into a liquid state. The high-pressure liquid refrigerant enters the expansion valve 4 from the condenser 2 through a pipeline. The expansion valve 4 throttles and reduces the pressure of the refrigerant, so that its pressure and temperature are reduced. The refrigerant after throttling and reducing the pressure enters the evaporator 1 again, thereby repeating the cycle. When frost is detected on the evaporator 1, the rubber defrost rod 5 moves to one side of the evaporator 1, moves repeatedly, and cooperates with the rubber defrost protrusion 6 to scrape and clean the frost on the evaporator 1.

[0041] Secondly, a plurality of heat sinks 8 are sequentially arranged on the evaporation tubes of the evaporator body 7. The heat sink 8 dissipates heat from the evaporation tubes of the evaporator 1. Since the evaporator 1 is installed outdoors, when the surface temperature of the heat sink 8 is below zero degrees and below the dew point temperature of the outdoor air, frost will form on the surface of the evaporator.

[0042] At the same time, the movement and adjustment unit is arranged on the evaporator body 7; the two longitudinal electric slide rails 9 are symmetrically arranged on one side of the evaporator body 7, the two longitudinal sliders 10 are respectively slidably connected with the corresponding longitudinal electric slide rails 9, the transverse electric slide rail 11 is arranged between the two longitudinal sliders 10, and the transverse slider 12 is slidably connected with the transverse electric slide rail 11. The longitudinal electric slide rail 9 is started to drive the longitudinal slider 10 to move, so that the transverse electric slide rail 11 moves longitudinally, and the transverse electric slide rail 11 is started to drive the transverse slider 12 to move, so that the support slider can be adjusted longitudinally and transversely in all directions on one side of the evaporator body 7.

[0043] In addition, the support shell 15 is arranged below the transverse slider 12, the switching shell 16 is connected to one end of the support shell 15, the camera 13 and the temperature sensor 14 are arranged in sequence at the other end of the support shell 15, the two switching mechanisms 17 are symmetrically arranged on both sides of the switching shell 16, the support plate 19 is arranged on the two switching mechanisms 17 and is located inside the switching shell 16, the rubber plate 18 is detachably connected to one side of the support plate 19, a plurality of rubber defrost rods 5 are arranged on the rubber plate 18 in sequence, the sponge plate 22 is detachably connected to the other side of the support plate 19, a plurality of sponge strips 23 are arranged on the sponge plate 22 in sequence, a plurality of microfiber strips 24 are arranged on the corresponding sponge strips 23 in sequence, a plurality of the first heating wires 20 are arranged in sequence inside the support plate 19, and a plurality of the second heating wires 21 are arranged in sequence on the inner wall of the switching shell 16. The temperature sensor 14 detects the temperature of the heat sink 8. When the temperature is lower than the preset value, it indicates that there is a risk of frost. At this time, the camera 13 is turned on to shoot the heat sink 8 and transmit the information to the host computer for analysis and confirmation. After confirming the existence of frost, the switching electric slide rail 27 is started, driving the switching slider 28 to move, driving the self-locking motor 25 to move, and the rotating shaft 26 slides in the slide groove 29, so that the support plate 19 moves in the support shell 15. A plurality of the rubber defrosting slide bars are inserted between the plurality of the heat sinks 8, and move in all directions under the action of the longitudinal electric slide rail 9 and the transverse electric slide rail 11 to scrape off the frost, while cooperating with the rubber defrosting protrusion 6 to improve the defrosting effect.

[0044] After defrosting is completed, the support plate 19 moves into the switching housing 16. At this time, the self-locking motor 25 is started to drive the support plate 19 to rotate, so that the positions of the sponge strip 23 and the rubber defrost rod 5 are swapped. The sponge strip 23 and the multiple microfiber strips 24 are inserted between the multiple heat sinks 8 to absorb the residual moisture on the heat sink 8 to avoid secondary frosting. At the same time, when the camera 13 can capture the presence of dew on the heat sink 8 but no frost, water can be absorbed through the above operation to avoid frost. The sponge plate 22 can increase the water storage capacity so that the sponge strip 23 and the microfiber strip 24 can absorb more moisture. When the water absorption is completed, it returns to the switching housing 16. At this time, the first heating wire 20 is started to heat the support plate 19 to heat and dry the sponge plate 22. The second heating wire 21 is started to heat and dry the sponge strip 23 and the microfiber strip 24. The water vapor is discharged from the opening above the switching housing 16 so that it can be put into use again.

[0045] Then, the support shell 15 and the switching shell 16 both have a slide groove 29, the rotating shaft 26 and the slide groove 29 are adapted to each other, one end of the rotating shaft 26 is fixedly connected to the support plate 19, the other end of the rotating shaft 26 passes through the slide groove 29, and is fixedly connected to the output end of the self-locking motor 25, the switching electric slide rail 27 is arranged on one side of the support shell 15 and the switching shell 16, the switching slider 28 is slidably connected to the switching electric slide rail 27, and the self-locking motor 25 is fixedly connected to the switching slider 28. The self-locking motor 25 is started, driving the rotating shaft 26 to rotate, so that the support plate 19 rotates in the switching shell 16, so that the rubber defrosting rod 5 and the sponge strip 23 switch positions, and after the switching, the switching electric slide rail 27 is started, driving the switching slider 28 to move, enter the interior of the support shell 15, and perform defrosting or water absorption.

[0046] Again, the two adsorption units are symmetrically arranged above and below the supporting shell 15; the adsorption shell 30 is arranged on the supporting shell 15, the first fan 31 is arranged inside the adsorption shell 30, and the transverse slider 12 is fixedly connected to the adsorption shell 30. The adsorption shell 30 supports the first fan 31, and the first fan 31 is started to adsorb the scraped frost to prevent it from falling down onto other heat sinks 8.

[0047] Finally, the two heating units are symmetrically arranged on both sides of the supporting shell 15; the heating shell 32 is fixedly connected to the supporting shell 15 and is located on one side of the supporting shell 15; the plurality of third heating wires 33 are sequentially arranged inside the heating shell 32; the second fan 34 is arranged inside the heating shell 32 and is located on one side of the third heating wire 33. The heating shell 32 supports the second heating wire 21 and the second fan 34; the second heating wire 21 heats the surrounding air; and then the second fan 34 is started to blow the hot air onto the heat sink 8, thereby thinning the thick and stubborn frost, thereby improving the scraping efficiency and effect.

[0048] When an air source heat pump of the present embodiment is used, air enters the evaporator 1, and the refrigerant exchanges heat with the surrounding air. Since the pressure in the evaporator 1 is relatively low, the refrigerant can absorb heat from the air and evaporate into a gaseous state, while absorbing a large amount of heat. The compressor 3 sucks in the gaseous refrigerant and compresses it, thereby increasing its pressure and temperature, so that the refrigerant changes from a low-pressure gaseous state to a high-pressure gaseous state. At this time, the high-pressure gaseous refrigerant enters the condenser 2 from the compressor 3, and in the condenser 2, the refrigerant exchanges heat with the cooling medium. Since the pressure in the condenser 2 is relatively high, the refrigerant can release heat and condense into a liquid state. The high-pressure liquid refrigerant enters the expansion valve 4 from the condenser 2 through a pipeline. The expansion valve 4 throttles and reduces the pressure of the refrigerant, thereby reducing its pressure and temperature. The refrigerant after throttling and reducing the pressure enters the evaporator 1 again, thereby repeating the cycle.

[0049] When frost is detected on the evaporator 1, the temperature sensor 14 detects the temperature of the heat sink 8. When the temperature is lower than the preset value, there is a risk of frost. At this time, the camera 13 is turned on to take a picture of the heat sink 8 for confirmation. After confirming the existence of frost, the switching electric slide rail 27 is started, driving the switching slider 28 to move, driving the self-locking motor 25 to move, and the rotating shaft 26 slides in the slide groove 29, so that the support plate 19 moves in the support shell 15. A plurality of rubber defrost slide bars are inserted between a plurality of heat sinks 8, and move in all directions under the action of the longitudinal electric slide rail 9 and the transverse electric slide rail 11, and at the same time cooperate with the rubber defrost protrusion 6 to scrape and clean the frost on the heat sink 8. After the cleaning is completed, the self-locking motor 25 is started, driving the rotating shaft 26 to rotate, so that the support The plate 19 rotates in the switching housing 16, so that the rubber defrost rod 5 and the sponge strip 23 switch positions. After the switching, the switching electric slide rail 27 is started, driving the switching slider 28 to move and enter the interior of the supporting housing 15 to absorb water to avoid secondary frost caused by retained moisture. At the same time, the camera 13 can also capture the presence of dew on the heat sink 8, but when it is not frosted, it can also absorb water through the above operation to avoid frosting. While scraping off the frosting, the first fan 31 is started to absorb the scraped frost to prevent it from falling onto other heat sinks 8. Through the above structural setting, when frosting occurs on the evaporator 1, there is no need for reverse circulation, and the indoor fan will not stop running, thereby avoiding the system's heating performance from decreasing. The operation can be changed to clean the frosting, which does not affect the user's indoor use and greatly improves the user experience.

[0050] See also Figure 8 The present invention also provides a defrosting control method for an air source heat pump, comprising the following steps:

[0051] S1: The longitudinal electric slide rail 9 and the transverse electric slide rail 11 are started to move the support housing 15 to the vicinity of the heat sink 8;

[0052] S2: The temperature sensor 14 detects the temperature of the heat sink 8. When the temperature is lower than a preset value, there is a risk of frost. At this time, the camera 13 is turned on to take a picture of the heat sink 8 for confirmation;

[0053] S3: After confirming the existence of frost, the switching electric slide rail 27 is started, so that the support plate 19 moves in the support housing 15;

[0054] S4: The plurality of rubber defrosting slide bars are inserted between the plurality of heat sinks 8, and move in all directions under the action of the longitudinal electric slide rail 9 and the transverse electric slide rail 11 to scrape off the frost, and cooperate with the rubber defrosting protrusion 6 to improve the defrosting effect;

[0055] S5: After defrosting is completed, the support plate 19 moves into the switching housing 16, and the self-locking motor 25 starts to drive the support plate 19 to rotate, so that the positions of the sponge strip 23 and the rubber defrosting rod 5 are swapped;

[0056] S6: The sponge strip 23 and the plurality of microfiber strips 24 are inserted between the plurality of heat sinks 8 to absorb the residual moisture on the heat sink 8 to avoid secondary frosting;

[0057] S7: At the same time, when the camera 13 captures dew on the heat sink 8 but no frost, the heat sink 8 can absorb water through the above operation to avoid frost.

[0058] S8: The longitudinal electric slide rail 9 and the transverse electric slide rail 11 move in all directions to perform defrosting operations on the plurality of heat sinks 8 in sequence.

[0059] Among them, the longitudinal electric slide rail 9 and the transverse electric slide rail 11 are started to move the support shell 15 to the vicinity of the heat sink 8; the temperature sensor 14 detects the temperature of the heat sink 8. When the temperature is lower than the preset value, there is a risk of frost. At this time, the camera 13 is turned on to take a picture of the heat sink 8 for confirmation; after confirming the existence of frost, the switching electric slide rail 27 is started to make the support plate 19 move in the support shell 15; a plurality of the rubber defrosting slide bars are inserted between the plurality of the heat sinks 8, and move in all directions under the action of the longitudinal electric slide rail 9 and the transverse electric slide rail 11 to scrape off the frost, and at the same time cooperate with the rubber defrosting protrusion 6 to provide High defrosting effect; after defrosting is completed, the support plate 19 moves into the switching housing 16, and the self-locking motor 25 is started at this time, driving the support plate 19 to rotate, so that the positions of the sponge strip 23 and the rubber defrost rod 5 are swapped; the sponge strip 23 and the multiple microfiber strips 24 are inserted between the multiple heat sinks 8 to absorb the residual moisture on the heat sink 8 to avoid secondary frosting; at the same time, the camera 13 can also capture the presence of dew on the heat sink 8, but when it is not frosted, it can also absorb water through the above operation to avoid frosting; the longitudinal electric slide rail 9 and the transverse electric slide rail 11 are moved in all directions to perform defrosting operations on the multiple heat sinks 8 in turn.

[0060] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An air source heat pump, comprising an evaporator, a condenser, a compressor and an expansion valve, wherein the evaporator is connected to the compressor, the compressor is connected to the condenser, the condenser is connected to the expansion valve, and the expansion valve is connected to the evaporator. It is characterized in that Also included is a defrost assembly; The defrost assembly includes a plurality of rubber defrost rods and a plurality of rubber defrost protrusions. The plurality of rubber defrost rods are sequentially arranged on one side of the evaporator. The plurality of rubber defrost protrusions are respectively fixedly connected to the corresponding rubber defrost rods and sequentially distributed on the outside of the rubber defrost rods.

2. The air source heat pump according to claim 1, It is characterized in that The evaporator comprises an evaporator body and a plurality of heat sinks, wherein the plurality of heat sinks are sequentially arranged on the evaporation tubes of the evaporator body.

3. The air source heat pump according to claim 2, It is characterized in that The defrost assembly further includes a moving adjustment unit, and the moving adjustment unit is arranged on the evaporator body; The movable adjustment unit includes two longitudinal electric slide rails, two longitudinal sliders, a transverse electric slide rail and a transverse slider. The two longitudinal electric slide rails are symmetrically arranged on one side of the evaporator body, and the two longitudinal sliders are respectively slidably connected to the corresponding longitudinal electric slide rails. The transverse electric slide rail is arranged between the two longitudinal sliders, and the transverse slider is slidably connected to the transverse electric slide rail.

4. The air source heat pump according to claim 3, It is characterized in that The defrost assembly also includes a defrost switching unit, which includes a camera, a temperature sensor, a supporting shell, a switching shell, two switching mechanisms, a rubber plate, a supporting plate, a plurality of first heating wires, a plurality of second heating wires, a sponge plate, a plurality of sponge strips and a plurality of microfiber strips. The supporting shell is arranged below the transverse slider, the switching shell is connected to one end of the supporting shell, the camera and the temperature sensor are arranged at the other end of the supporting shell in sequence, the two switching mechanisms are symmetrically arranged on both sides of the switching shell, the supporting plate is arranged on the two switching mechanisms and is located inside the switching shell, the rubber plate is detachably connected to one side of the supporting plate, a plurality of rubber defrost rods are arranged on the rubber plate in sequence, the sponge plate is detachably connected to the other side of the supporting plate, a plurality of sponge strips are arranged on the sponge plate in sequence, a plurality of microfiber strips are arranged on the corresponding sponge strips in sequence, a plurality of the first heating wires are arranged inside the supporting plate in sequence, and a plurality of the second heating wires are arranged on the inner wall of the switching shell in sequence.

5. The air source heat pump according to claim 4, It is characterized in that The switching mechanism includes a self-locking motor, a rotating shaft, a switching electric slide rail and a switching slider. The supporting shell and the switching shell both have a slide groove. The rotating shaft and the slide groove are adapted to each other. One end of the rotating shaft is fixedly connected to the supporting plate. The other end of the rotating shaft passes through the slide groove and is fixedly connected to the output end of the self-locking motor. The switching electric slide rail is arranged on one side of the supporting shell and the switching shell. The switching slider is slidably connected to the switching electric slide rail, and the self-locking motor is fixedly connected to the switching slider.

6. The air source heat pump according to claim 5, It is characterized in that The defrost assembly further includes two adsorption units, which are symmetrically arranged above and below the supporting shell; The adsorption unit comprises an adsorption shell and a first fan. The adsorption shell is arranged on the supporting shell. The first fan is arranged inside the adsorption shell. The transverse slider is fixedly connected to the adsorption shell.

7. The air source heat pump according to claim 6, It is characterized in that The defrosting assembly further comprises two heating units, which are symmetrically arranged on both sides of the supporting shell; The heating unit includes a heating shell, a plurality of third heating wires and a second fan. The heating shell is fixedly connected to the supporting shell and is located on one side of the supporting shell. The plurality of third heating wires are sequentially arranged inside the heating shell. The second fan is arranged inside the heating shell and is located on one side of the third heating wires.

8. A defrosting control method for an air source heat pump, using the air source heat pump as claimed in claim 7, It is characterized in that The steps include: The longitudinal electric slide rail and the transverse electric slide rail are started to move the support housing to the vicinity of the heat sink; The temperature sensor detects the temperature of the heat sink. When the temperature is lower than a preset value, there is a risk of frost. At this time, the camera is turned on to take a picture of the heat sink for confirmation; After confirming the existence of frost, the switching electric slide rail is started to move the support plate in the support housing; The plurality of rubber defrosting slide bars are inserted between the plurality of heat sinks, and move in all directions under the action of the longitudinal electric slide rail and the transverse electric slide rail to scrape off the frost, and cooperate with the rubber defrosting protrusions to improve the defrosting effect; After defrosting is completed, the support plate moves into the switching housing, and the self-locking motor starts to drive the support plate to rotate, so that the positions of the sponge strip and the rubber defrosting rod are swapped; The sponge strip and the plurality of microfiber strips are inserted between the plurality of heat sinks to absorb the residual moisture on the heat sinks to avoid secondary frosting; At the same time, when the camera captures dew on the heat sink but no frost, water can be absorbed through the above operation to avoid frost. The longitudinal electric slide rail and the transverse electric slide rail are moved in all directions to perform defrosting operations on the plurality of heat sinks in sequence.

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