CN111520818A

CN111520818A - Air conditioner indoor unit, air conditioner defrosting method and air conditioner

Info

Publication number: CN111520818A
Application number: CN202010241011.4A
Authority: CN
Inventors: 陈守海; 王铁; 王军; 徐洪祥
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-08-11

Abstract

The invention discloses an air conditioner indoor unit, an air conditioner defrosting method and an air conditioner. The air-conditioning indoor unit comprises a fan assembly, a heat exchanger assembly, a heating assembly and a controller. The fan assembly includes at least two independent air ducts. The heat exchanger subassembly includes two at least heat exchangers, and two at least heat exchangers correspond respectively and set up in two at least wind channels. The heating assembly is disposed within the at least one air channel. The controller is used for controlling the heating assembly to operate when the defrosting starting signal is detected, and controlling at least one heat exchanger located in different air channels from the heating assembly to operate. Therefore, the heat exchanger for defrosting can be matched with an outdoor unit to realize a reverse outdoor heating and defrosting cycle process; and heating element then can be in the defrosting overall process continuously produce the heat, has solved the big problem of indoor temperature fluctuation forcefully, has guaranteed the comfortable defrosting of overall process and the demand of comfortable heating, has improved user experience.

Description

Air conditioner indoor unit, air conditioner defrosting method and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner indoor unit, an air conditioner defrosting method and an air conditioner.

Background

Currently, a cooling and heating type heat pump type air conditioner is provided with a cooling mode and a heating mode. In winter, the user can operate the heating mode of the air conditioner to heat. In cold regions, the average temperature is below zero in winter, and the heat exchanger of the outdoor unit can frost during the operation of the air conditioner. Along with the deterioration of the operation condition, if defrosting is not carried out, the frost layer is thicker and thicker, the heating effect is poor, the fan blades are damaged, and the compressor is damaged, so that the cold and warm heat pump type air conditioner needs to operate a refrigeration mode to defrost.

During defrosting, the indoor fan of the air conditioner is normally in a stopped state, and the indoor unit operates in a cooling mode to complete a heating and defrosting cycle in cooperation with the outdoor unit. However, in this process, since the indoor unit generates no heat and has a large amount of cold radiation, that is, not only does not heat, but also needs to absorb heat indoors, especially when the cold load is large in cold winter, the fluctuation of the indoor temperature is severe, and when the indoor temperature is reduced from 22 ℃ to 12 ℃ in the defrosting process for three or five minutes, the comfort experience of the user is poor, and the health problems such as cold are easily caused.

Disclosure of Invention

The invention aims to provide an air conditioner indoor unit, an air conditioner defrosting method and an air conditioner, which can solve the problem that in the process of heating by a user using an air conditioner, the indoor unit does not heat during the defrosting of the air conditioner, but the room temperature is reduced due to cold radiation, so that the user experience is poor.

The embodiment of the invention provides an air conditioner indoor unit, which comprises a fan assembly, a heat exchanger assembly, a heating assembly and a controller.

The fan assembly comprises at least two independent air channels; the heat exchanger assembly comprises at least two heat exchangers which are respectively and correspondingly arranged in the at least two air ducts; the heating assembly is arranged in at least one air channel; the controller is used for controlling the heating assembly to operate when a defrosting starting signal is detected, and controlling at least one heat exchanger which is positioned in the air duct and is different from the heating assembly to operate.

In one embodiment, the indoor unit of the air conditioner further comprises an electromagnetic valve, a flow dividing assembly and a refrigerant pipeline assembly; the flow dividing assembly comprises a main flow divider, the refrigerant pipeline assembly comprises a main inlet pipe, the main flow divider is used for dividing the main inlet pipe into at least two refrigerant pipelines, the at least two refrigerant pipelines respectively correspond to inlets of at least two heat exchangers, and the electromagnetic valve is arranged on the refrigerant pipeline corresponding to the heating assembly.

In one embodiment, the flow dividing assembly further comprises a sub-flow divider, and the refrigerant pipeline assembly further comprises a main outlet pipe; the sub-flow divider is used for dividing the refrigerant in the refrigerant pipeline corresponding to the running heat exchanger; the main outlet pipe corresponds to the outlets of at least two of the heat exchangers.

In one embodiment, the heating assembly comprises an electric heater;

the number of the electric heaters is one, and the electric heaters are arranged in the air duct; the controller is also used for controlling the electric heater to operate, controlling the heat exchanger which is positioned in the same air duct with the electric heater to be closed, and controlling the rest at least one heat exchanger to operate; or

The electric heaters are arranged in each air channel respectively; the controller is also used for controlling part of the electric heaters to operate, controlling the heat exchangers which are positioned in the same air duct with the part of the electric heaters to be closed, and controlling the rest at least one heat exchanger to operate.

In one embodiment, the fan assembly further comprises at least two fans, the at least two fans are respectively arranged in the at least two air channels, and the heating assembly is arranged in the air channel between the fan and the heat exchanger; the controller is also used for controlling the fan which is positioned in the same air duct with the heating assembly to operate, and controlling the fan which is positioned in the same air duct with the heat exchanger to be closed.

In one embodiment, the indoor unit of the air conditioner is a floor cabinet, and the heating assembly is arranged in the air duct close to the ground.

The defrosting method of the air conditioner provided by the embodiment of the invention is applied to the indoor unit of the air conditioner in the embodiment, and the method comprises the following steps:

when a defrosting starting signal is detected, controlling the heating assembly to operate; and

and controlling at least one heat exchanger which is positioned in the air duct and is different from the heating assembly to operate.

In one embodiment, the fan assembly further includes at least two fans, and the at least two fans are respectively disposed in the at least two air ducts, and the method further includes:

controlling a fan which is positioned in the same air channel with the heating assembly to operate at a first air speed; and

and controlling the rest fans to be closed.

In one embodiment, the indoor unit of the air conditioner further comprises an electromagnetic valve, a flow dividing assembly and a refrigerant pipeline assembly; the flow dividing assembly comprises a main flow divider, the refrigerant pipeline assembly comprises a main inlet pipe, the main flow divider is used for dividing the main inlet pipe into at least two refrigerant pipelines, the at least two refrigerant pipelines respectively correspond to inlets of at least two heat exchangers, and the electromagnetic valve is arranged on the refrigerant pipeline corresponding to the heating assembly; the method further comprises the following steps:

detecting the running state of the air conditioner;

when a defrosting starting signal is detected, controlling the electromagnetic valve to be electrified; and

and when a defrosting end signal is detected, controlling the electromagnetic valve to be closed.

The air conditioner provided by the embodiment of the invention comprises one or more processors and a memory. A memory coupled to the processor for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the air conditioner defrosting method according to the above embodiment.

In the air-conditioning indoor unit of the embodiment, at least two independent air channels are arranged, the heat exchanger and the heating assembly for defrosting are respectively arranged in different air channels, and then the operation of the heat exchanger and the heating assembly for defrosting is independently controlled through the controller. Therefore, the heat exchanger for defrosting can be matched with an outdoor unit to realize a reverse outdoor heating and defrosting cycle process; and heating element then can be in the defrosting overall process continuously produce the heat, has solved the big problem of indoor temperature fluctuation forcefully, has guaranteed the comfortable defrosting of overall process and the demand of comfortable heating, has improved user experience.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an indoor unit of an air conditioner according to another embodiment of the present invention;

fig. 3 is a schematic structural view of an indoor unit of an air conditioner according to still another embodiment of the present invention;

fig. 4 is a schematic flow chart of a defrosting method for an air conditioner according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart of a defrosting method for an air conditioner according to another embodiment of the present invention;

FIG. 6 is a flow chart of a defrosting method for an air conditioner according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of an air conditioner defrosting apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.

It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, an embodiment of the invention provides an air conditioner indoor unit 100. The indoor unit 100 of the air conditioner includes a fan assembly 10, a heat exchanger assembly 20, a heating assembly 30, and a controller.

The fan assembly 10 includes at least two independent air stacks 11. The heat exchanger assembly 20 includes at least two heat exchangers 21, and the at least two heat exchangers 21 are respectively and correspondingly disposed in the at least two air ducts 11. The heating assembly 30 is disposed within the at least one air chute 11. The controller is used for controlling the heating assembly 30 to operate when the defrosting start signal is detected, and controlling the at least one heat exchanger 21 located in the different air duct 11 from the heating assembly 30 to operate.

The air duct 11 is a passage through which air flows in the indoor unit 100, and for example, the air flows through the heat exchanger 21, the heating unit 30, the fan, and the like. In this embodiment, the number of the air ducts 11 is at least two, for example, two, three, four or more than four. Each air duct 11 is independent, and the air outlets thereof are also independent.

The heat exchanger 21 is provided with an inside and an outside. The heat exchanger 21 is used to exchange heat between air and the refrigerant when the refrigerant flows through the inside and the air flows through the outside. In the present embodiment, the number of the heat exchangers 21 is at least two, for example, two, three, four, or more than four. Each heat exchanger 21 is disposed in each air duct 11, and taking fig. 1 as an example, two heat exchangers 21 are disposed in two air ducts 11.

The heating assembly 30 is used for heating the air in the air duct 11. In one embodiment, as shown in FIG. 1, the heating assembly 30 includes an electric heater 31. In other embodiments, the heating assembly 30 may be other, and is not limited in particular.

A controller is electrically connected to each of the heat exchanger 21 and the heating assembly 30, respectively, and is used to control the operation of each of the electrical devices. Specifically, when the air conditioning indoor unit 100 is in the heating mode, the controller controls at least one heat exchanger 21 to operate, so that the corresponding air duct 11 blows hot air, thereby increasing the indoor temperature. When the air conditioning indoor unit 100 is in the cooling mode (outdoor unit defrosting), the controller controls the heating unit 30 to operate when the defrosting start signal is detected. The heat generated from the heating assembly 30 is blown out through the corresponding air duct 11, increasing the indoor temperature. Meanwhile, the controller will also control at least one heat exchanger 21 located in different air channels 11 with the heating assembly 30 to operate, so as to cooperate with the outdoor unit to realize the reverse outdoor heating and defrosting cycle process. In other words, after detecting the defrosting start signal, the controller independently controls the operation of the heat exchanger 21 and the heating assembly 30 for defrosting, so that a large amount of heat is continuously generated in the process of cooling and defrosting of the indoor unit 100 of the air conditioner, the indoor temperature is maintained, the temperature fluctuation is suppressed, and the requirement of comfortable heating is met.

Referring to fig. 1, the air conditioning indoor unit 100 of the present embodiment will be described in detail by taking the structures of two air ducts 11, two heat exchangers 21, and one heating unit 30 as an example. For convenience of description, the upper air path 11 and the lower air path 11 are defined as a first air path 111 and a second air path 112, respectively, and the upper heat exchanger 21 and the lower heat exchanger 21 are defined as a first heat exchanger 211 and a second heat exchanger 212, respectively. The first air duct 111 and the second air duct 112 are independent of each other. The first heat exchanger 211 is disposed in the first air duct 111, and the second heat exchanger 212 and the heating assembly 30 are both disposed in the second air duct 112. When the air conditioning indoor unit 100 is in the cooling mode (outdoor defrosting), the controller controls the heating assembly 30 to operate. The heat generated by the heating element 30 is blown out through the air outlet of the second air duct 112, so that the indoor temperature is increased. Meanwhile, the controller also controls the first heat exchanger 211 to operate, so as to cooperate with the outdoor unit to realize a reverse outdoor heating and defrosting cycle process.

In other embodiments, as shown in fig. 2, the heating assembly 30 in the above embodiments may also be disposed in the first air duct 111 to heat and maintain the room temperature, and the second heat exchanger 212 participates in reverse defrosting; or the two heat exchangers and the air duct are combined and arranged in a left-right or front-back mode, and the like, so that heating and defrosting are respectively operated during defrosting.

Of course, in other embodiments, 3 segments (as shown in fig. 3) or more heat exchanger-air duct combinations may be used, the air ducts 11 are partially or completely independent from each other, the heat exchanger 21 of one portion of the air duct 11 is selected to participate in the reverse defrosting cycle during the defrosting, and the other portion of the air duct 11 is heated by the heating assembly 30 to maintain the room temperature.

In summary, in the air conditioning indoor unit 100 of the present embodiment, at least two independent air ducts 11 are provided, the heat exchanger 21 and the heating unit 30 for defrosting are respectively provided in different air ducts 11, and then the operation of the heat exchanger 21 and the heating unit 30 for defrosting are independently controlled by the controller. Thus, the heat exchanger 21 for defrosting can be matched with an outdoor unit to realize a reverse outdoor heating defrosting cycle process; and heating element 30 then can be in the defrosting overall process continuously produce the heat, has powerfully solved the big problem of indoor temperature fluctuation, has guaranteed the comfortable defrosting of overall process and the demand of comfortable heating, has improved user experience.

Referring to fig. 1, in one embodiment, the indoor unit 100 of the air conditioner further includes an electromagnetic valve 40, a flow dividing assembly 50, and a refrigerant pipe assembly 60. The flow dividing assembly 50 includes a main flow divider 51, the refrigerant conduit assembly 60 includes a main inlet pipe 61, and the main flow divider 51 is used for dividing the main inlet pipe 61 into at least two refrigerant conduits 62. The at least two refrigerant pipes 62 correspond to inlets of the at least two heat exchangers 21, respectively. The solenoid valve 40 is disposed on the refrigerant pipe 62 corresponding to the heating unit 30.

In this embodiment, the number of the refrigerant pipes 62 corresponds to the number of the heat exchangers 21, and the solenoid valve 40 is disposed on the refrigerant pipe 62 corresponding to the heating assembly 30, and is used for controlling on and off of the refrigerant in the air duct 11. When the air conditioning indoor unit 100 is in the cooling mode (outdoor unit defrosting), the controller controls the heating unit 30 to operate, and controls the solenoid valve 40 to be powered on, so as to stop the refrigerant circulation in the refrigerant pipe 62 corresponding to the heating unit 30, and thus the surface temperature of the heat exchanger 21 in the air duct 11 is not lower than the indoor ambient temperature because the refrigerant stops flowing. The air duct 11 and the heating unit 30 cooperate to perform ventilation and heating. Meanwhile, the controller controls the rest at least one heat exchanger 21 to participate in refrigerant system circulation to perform reverse defrosting. Therefore, the heat exchanger 21 located in the same air duct 11 as the heating assembly 30 is prevented from being cooled additionally, and the hot air generated by the heating assembly 30 is cooled, so as to further ensure the requirement of comfortable heating.

Of course, in other embodiments, the controller may also directly control the heat exchanger 21 located in the same air duct 11 as the heating assembly 30 to be turned off when the defrost start signal is detected. In other words, after detecting the defrosting start signal, the controller independently controls the operation of the heat exchanger 21 for defrosting and the operation of the heating assembly 30, and controls the heat exchanger 21 for non-defrosting to be turned off, so as to prevent the heat exchanger 21 located in the same air duct 11 as the heating assembly 30 from cooling additionally and cool down the hot air generated by the heating assembly 30.

With continued reference to fig. 1, in one embodiment, the flow splitting assembly 50 further includes a sub-flow splitter 52, and the refrigerant conduit assembly 60 further includes a main outlet pipe 63. The sub-manifold 52 is used to branch the refrigerant in the refrigerant pipe 62 corresponding to the operating heat exchanger 21. The main outlet pipe 63 corresponds to the outlets of at least two heat exchangers 21.

When the air conditioning indoor unit 100 is in the cooling mode, the sub-flow splitter 52 corresponding to the operating heat exchanger 21 splits the refrigerant in the refrigerant pipe 62, increasing the area of the refrigerant in the refrigerant pipe 62 entering the heat exchanger 21, and improving the heat exchange efficiency of the heat exchanger 21.

Of course, in another embodiment, as shown in fig. 1, the sub-flow splitter 52 may be disposed in the refrigerant pipe 62 corresponding to the heating module 30, so that the heat exchanger 21 corresponding to the heating module 30 can exchange heat effectively during non-cooling defrosting, for example, during heating.

With continued reference to fig. 1, in one embodiment, the heating element 30 includes an electric heater 31. The electric heater 31 is one, and the electric heater 31 is disposed in the air duct 11. The controller is also used for controlling the operation of the electric heater 31, controlling the heat exchanger 21 which is positioned in the same air duct 11 with the electric heater 31 to be closed, and controlling the operation of at least one of the rest heat exchangers 21.

In this embodiment, when the air conditioning indoor unit 100 is in the cooling mode (outdoor unit defrosting), the controller controls the electric heater 31 to operate when the defrosting start signal is detected. The heat generated by the electric heater 31 is blown out through the corresponding air duct 11, thereby increasing the indoor temperature. Meanwhile, the controller also controls the heat exchanger 21 in the same air duct 11 as the electric heater 31 to close, so as to prevent the heat exchanger 21 in the same air duct 11 as the electric heater 31 from cooling additionally, and thus, the temperature of the hot air generated by the electric heater 31 is reduced. In addition, the controller also controls at least one heat exchanger 21 located in a different air duct 11 from the electric heater 31 to operate, so as to cooperate with the outdoor unit to realize a reverse outdoor heating and defrosting cycle.

In another embodiment, the electric heater 31 is plural, and the plural electric heaters 31 are respectively disposed in each air duct 11. The controller is also used for controlling the operation of part of the electric heaters 31, controlling the heat exchangers 21 which are positioned in the same air duct 11 with the part of the electric heaters 31 to be closed, and controlling the operation of at least one of the rest heat exchangers 21.

In this embodiment, one or more heating elements 30 may be included in each independent air duct 11. When the indoor unit 100 is in the heating mode, the controller may control all the heating units 30 to operate, so as to increase the indoor temperature and improve the indoor heating capacity of the indoor unit 100 during heating. When the air conditioning indoor unit 100 is in the cooling mode (outdoor unit defrosting), the controller controls a part of the electric heater 31 to operate, controls the heat exchanger 21 located in the same air duct 11 as the electric heater 31 to be closed, and controls all or part of the rest of the heat exchangers 21 to participate in reverse defrosting, so that the heating capacity of the air conditioning indoor unit 100 to the indoor space during cooling can be improved, and the fluctuation of the indoor temperature can be further suppressed.

Referring to fig. 1, in one embodiment, the fan assembly 10 further includes at least two fans 12, the at least two fans 12 are respectively disposed in the at least two air ducts 11, and the heating assembly 30 is disposed in the air duct 11 between the fans 12 and the heat exchanger 21. The controller is also used for controlling the operation of the fan 12 which is positioned in the same air duct 11 as the heating assembly 30, and controlling the closing of the fan 12 which is positioned in the same air duct 11 as the operating heat exchanger 21.

In the present embodiment, the form of the fan 12 includes, but is not limited to, a cross-flow fan, a centrifugal fan, an axial fan, and the like. In one embodiment, fan 12 is a combination of a fan and a motor that drives the fan.

The fan 12 is configured to discharge the air heat-exchanged by the heat exchanger 21 and/or the air heated by the heating unit 30 when the air conditioning indoor unit 100 is in the heating mode.

When the air conditioning indoor unit 100 is in the cooling mode (outdoor unit defrosting), the fan 12 located in the same duct 11 as the heating unit 30 operates to discharge the air heated by the heating unit 30 to the room in time, thereby maintaining the room temperature and suppressing temperature fluctuation. Meanwhile, the fan 12 located in the same air duct 11 as the running heat exchanger 21 is closed, so that the air duct 11 corresponding to the heat exchanger 21 for defrosting is not discharged with cold air, hot air discharged from the air duct 11 corresponding to the heating assembly 30 is not interfered, indoor temperature fluctuation is further avoided, and the requirement of comfortable heating is guaranteed.

And the heating unit 30 is installed in parallel between the blower fan 12 and the heat exchanger 21. For convenience of explanation, taking fig. 1 as an example, the upper fan 12 and the lower fan 12 are defined as a first fan 121 and a second fan 122, respectively. Wherein the first fan 121 is disposed in the first air duct 111, the second fan 122 is disposed in the second air duct 112, and the heating units 30 are assembled in parallel between the second fan 122 and the second heat exchanger 212. Therefore, the novel function of ensuring the indoor temperature during the refrigeration and defrosting period is realized under the condition that the size of the original air conditioner indoor unit is not increased. In addition, the heating assembly 30 is arranged close to the fan 12, so that overheating of the heating assembly 30 during operation can be prevented, and the safety of the heating assembly 30 and the air duct 11 is ensured.

In one embodiment, the indoor unit 100 is a floor-type cabinet unit, and the heating unit 30 is disposed in the air duct 11 near the ground.

In this embodiment, please refer to fig. 1, the arrangement form of the air duct-heat exchanger with upper and lower sections conforms to the structural form of the floor cabinet, and the design is easy to implement. Moreover, since the hot air is easy to float upwards, the heating assembly 30 close to the ground is used for heating during defrosting, heat can more directly and effectively reach the main activity space of people, the heat exchanger 21 far away from the ground participates in reverse defrosting, and the generated cold radiation is far away from the main activity space of people. Like this, set up heating element 30 in the wind channel 11 that is close to ground, it is better to heat the effect, and user experience is also better.

Of course, in another embodiment, the position of the heating element 30 may also be changed according to the type of the indoor unit 100, and is not specifically limited herein.

Referring to fig. 4, an embodiment of the present invention provides an air conditioner defrosting method applied to the indoor unit 100 of an air conditioner in any of the above embodiments. The method comprises the following steps:

and S10, controlling the heating assembly 30 to operate when the defrosting start signal is detected.

And S20, controlling and heating the operation of at least one heat exchanger 21 with the assembly 30 positioned in different air ducts 11.

Specifically, when the air conditioning indoor unit 100 is in the heating mode, at least one heat exchanger 21 is controlled to operate, so that the corresponding air duct 11 blows hot air, thereby increasing the indoor temperature. When the air conditioning indoor unit 100 is in the cooling mode (outdoor unit defrosting), the heating unit 30 is controlled to operate when the defrosting start signal is detected. The heat generated from the heating assembly 30 is blown out through the corresponding air duct 11, increasing the indoor temperature. Meanwhile, at least one heat exchanger 21 located in different air channels 11 with the heating assembly 30 is also controlled to operate, so as to cooperate with the outdoor unit to realize a reverse outdoor heating and defrosting cycle process. In other words, after the defrosting start signal is detected, the operation of the heat exchanger 21 and the heating assembly 30 for defrosting are independently controlled, so that a large amount of heat is continuously generated in the process of cooling and defrosting of the indoor unit 100 of the air conditioner, the indoor temperature is maintained, the temperature fluctuation is suppressed, and the requirement of comfortable heating is met.

Referring to fig. 1, the air conditioning indoor unit 100 of the present embodiment will be described in detail by taking the structures of two air ducts 11, two heat exchangers 21, and one heating unit 30 as an example. When the air conditioning indoor unit 100 is in the cooling mode (outdoor defrosting), the heating unit 30 is controlled to operate. The heat generated by the heating element 30 is blown out through the air outlet of the second air duct 112, so that the indoor temperature is increased. Meanwhile, the first heat exchanger 211 is also controlled to operate to cooperate with the outdoor unit to realize a reverse outdoor heating and defrosting cycle process.

In summary, in the defrosting method of the air conditioner according to the present embodiment, the operations of the heat exchanger 21 and the heating unit 30 for defrosting are independently controlled. Thus, the heat exchanger 21 for defrosting can be matched with an outdoor unit to realize a reverse outdoor heating defrosting cycle process; and heating element 30 then can be in the defrosting overall process continuously produce the heat, has solved the big problem of indoor temperature fluctuation forcefully, has also solved the problem that the air conditioner can not continuously heat during the defrosting, has guaranteed the comfortable defrosting of overall process and the demand of comfortable heating, has improved user experience.

Referring to fig. 5, in an embodiment, the fan assembly 10 further includes at least two fans 12, and the at least two fans 12 are respectively disposed in the at least two air ducts 11. The method further comprises the following steps:

and S30, controlling the fan 12 in the same air duct 11 as the heating assembly 30 to operate at the first air speed.

And S40, controlling the rest fans 12 to be closed.

When the defrosting start signal is detected, in addition to controlling the heating assembly 30 to operate, the fan 12 located in the same duct 11 as the heating assembly 30 is also controlled to operate at the first wind speed. Wherein the first wind speed is a medium wind speed or a low wind speed. Therefore, hot air discharged to the indoor space is uniform, and the comfort level is high. And the rest fans 12 are closed, the air exhaust is stopped, and the air outlet corresponding to the air duct 11 is closed or swings to a smaller air outlet position. In this way, the air duct 11 corresponding to the defrosting heat exchanger 21 is not exhausted with cold air, and fluctuation of indoor temperature is avoided.

In one embodiment, the indoor unit 100 further includes a solenoid valve 40, a flow dividing assembly 50, and a refrigerant pipe assembly 60. The flow dividing assembly 50 includes a main flow divider 51, the refrigerant pipe assembly 60 includes a main inlet pipe 61, the main flow divider 51 is used for dividing the main inlet pipe 61 into at least two refrigerant pipes 62, the at least two refrigerant pipes 62 respectively correspond to inlets of the at least two heat exchangers 21, and the solenoid valve 40 is disposed on the refrigerant pipe 62 corresponding to the heating assembly 30. Referring to fig. 6, the method further includes the following steps:

and S50, detecting the running state of the air conditioner.

The operation states of the air conditioner include being in a cooling mode and being in a heating mode. When the defrosting condition is met, for example, the detected temperature of the outdoor heat exchanger is lower than a preset temperature (such as 0 ℃), the air conditioner sends a defrosting starting signal; when the defrosting condition is met, for example, the detected temperature of the outdoor heat exchanger is higher than the preset temperature, the air conditioner sends out a defrosting ending signal.

And S11, when the defrosting start signal is detected, the control solenoid valve 40 is electrified.

S60, when the defrosting end signal is detected, the control solenoid valve 40 is closed.

The present embodiment employs reverse refrigeration defrosting. Specifically, a four-way valve is added to a refrigeration system, and when the defrosting condition is met, the four-way valve is switched from a heating mode to a cooling mode, so that an outdoor heat exchanger is in heat dissipation, and the heat exchanger is defrosted by hot gas. The process comprises a four-way valve reversing process, a frequency reducing process, a frequency increasing process, a high-frequency defrosting process, a frequency re-reducing process, a reversing process, a frequency re-increasing process and a necessary stopping process required in the middle.

In this embodiment, the process of generating and blowing heat by the indoor unit 100 of the air conditioner runs through the whole defrosting process of the whole unit, that is, from the moment when the defrosting start signal is detected to the moment when the defrosting end signal is detected. The whole process continuously generates heat, the problem of large temperature fluctuation is powerfully solved, and the requirements of comfortable defrosting and comfortable heating of the whole process are met.

Of course, in other embodiments, the power-up of the solenoid valve 40 may occur at any time between the detection of the defrost start signal and the turning on of the press after the four-way valve is switched, and the turning off may occur at any time between the stop of the press and the restart of normal heating of the press after the defrost end signal is detected.

Referring to fig. 7, an embodiment of the present invention provides an air conditioner defrosting apparatus, which is applied to the indoor unit 100 of an air conditioner in any of the above embodiments. The apparatus includes a heating assembly control module 210 and a heat exchanger control module 220:

the heating assembly control module 210 is used to control the operation of the heating assembly 30 when the defrost start signal is detected. The heat exchanger control module 220 is used for controlling the operation of at least one heat exchanger 21 located in different air ducts 11 from the heating assembly 30.

For specific limitations of the air conditioner defrosting device, reference may be made to the above limitations of the air conditioner defrosting method, which will not be described herein again. All or part of each module in the air conditioner defrosting device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

Referring to fig. 8, an embodiment of the invention provides an air conditioner including one or more processors and a memory. The memory is coupled to the processor and is used for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors realize the defrosting method of the air conditioner in the embodiment.

The processor is used for controlling the overall operation of the air conditioner so as to complete all or part of the steps of the air conditioner defrosting method. The memory is used to store various types of data to support operation at the air conditioner, which may include, for example, instructions for any application or method operating on the air conditioner, as well as application-related data. The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.

In an exemplary embodiment, the air conditioner may be implemented by one or more application specific 1 integrated circuits (AS 1C), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, for performing the above-mentioned air conditioning method and achieving technical effects consistent with the above-mentioned method.

In another exemplary embodiment, there is also provided a computer readable storage medium including program instructions, which when executed by a processor, implement the steps of the air conditioner defrosting method described above. For example, the computer readable storage medium may be the memory described above including program instructions executable by a processor of an air conditioner to perform the air conditioner defrosting method described above, and to achieve technical effects consistent with the method described above

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make modifications and decorations without departing from the principle of the present invention, such as modifications of heat exchanger form, heat exchanger size, heat exchanger flow, fan structure form, and air duct structure form, and these modifications and decorations are also considered to be within the protection scope of the present invention.

Claims

1. An indoor unit of an air conditioner, comprising:

the fan assembly comprises at least two independent air channels;

the heat exchanger assembly comprises at least two heat exchangers, and the at least two heat exchangers are respectively and correspondingly arranged in the at least two air channels;

the heating assembly is arranged in at least one air channel; and

and the controller is used for controlling the heating assembly to operate when a defrosting starting signal is detected, and controlling at least one heat exchanger which is positioned in the air duct different from the heating assembly to operate.

2. The indoor unit of claim 1, further comprising a solenoid valve, a flow dividing assembly and a refrigerant pipe assembly;

the flow dividing assembly comprises a main flow divider, the refrigerant pipeline assembly comprises a main inlet pipe, the main flow divider is used for dividing the main inlet pipe into at least two refrigerant pipelines, the at least two refrigerant pipelines respectively correspond to inlets of at least two heat exchangers, and the electromagnetic valve is arranged on the refrigerant pipeline corresponding to the heating assembly.

3. An indoor unit of an air conditioner according to claim 2, wherein the flow dividing assembly further includes a sub-flow divider, and the refrigerant pipe assembly further includes a main outlet pipe; the sub-flow divider is used for dividing the refrigerant in the refrigerant pipeline corresponding to the running heat exchanger; the main outlet pipe corresponds to the outlets of at least two of the heat exchangers.

4. An indoor unit of an air conditioner according to claim 1, wherein the heating unit includes an electric heater;

5. An indoor unit of an air conditioner according to any one of claims 1 to 4, wherein the fan assembly further comprises at least two fans respectively disposed in at least two of the air ducts, and the heating assembly is disposed in the air duct between the fan and the heat exchanger;

the controller is also used for controlling the fan which is positioned in the same air duct with the heating assembly to operate, and controlling the fan which is positioned in the same air duct with the heat exchanger to be closed.

6. An indoor unit of an air conditioner according to any one of claims 1 to 4, wherein the indoor unit is a cabinet type air conditioner, and the heating unit is disposed in the duct near the ground.

7. An air conditioner defrosting method, which is applied to the indoor unit of the air conditioner of claim 1, and comprises the following steps:

8. The method of claim 7, wherein the fan assembly further comprises at least two fans disposed within at least two of the wind tunnels, respectively, the method further comprising:

and controlling the rest fans to be closed.

9. The method of claim 7, wherein the indoor unit of the air conditioner further comprises a solenoid valve, a flow dividing assembly and a refrigerant pipeline assembly; the flow dividing assembly comprises a main flow divider, the refrigerant pipeline assembly comprises a main inlet pipe, the main flow divider is used for dividing the main inlet pipe into at least two refrigerant pipelines, the at least two refrigerant pipelines respectively correspond to inlets of at least two heat exchangers, and the electromagnetic valve is arranged on the refrigerant pipeline corresponding to the heating assembly;

the method further comprises the following steps:

detecting the running state of the air conditioner;

10. An air conditioner, comprising:

one or more processors;

a memory coupled to the processor for storing one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the air conditioner defrost method of any of claims 7-9.