Air conditioner and control method of air conditioner

Abstract

The application relates to the technical field of air conditioners, and particularly provides an air conditioner and a control method of the air conditioner. The air conditioner comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger arranged on a refrigerant circulation loop. The outdoor heat exchanger comprises a first heat exchange zone and a second heat exchange zone which are separated from each other. The first heat exchange zone is arranged on the refrigerant circulation loop. One end of a refrigerant branch is arranged before an inlet of the first heat exchange zone, and the other end is arranged after an outlet of the first heat exchange zone. The second heat exchange zone is arranged on the refrigerant branch. A first throttling valve is arranged before the inlet of the first heat exchange zone, and a second throttling valve is arranged after the outlet of the first heat exchange zone. A third throttling valve is arranged before an inlet of the second heat exchange zone, and a fourth throttling valve is arranged after an outlet of the second heat exchange zone. A fifth throttling valve is arranged between the indoor heat exchanger and the outdoor heat exchanger. When defrosting, the opening and closing of the throttling valves are controlled, so that the outdoor heat exchanger can be defrosted in sections while the indoor is continuously heated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and specifically provides an air conditioner and a control method of the air conditioner. BACKGROUND

[0002] When the air conditioner is heating, the low-temperature refrigerant flows to the outdoor air conditioner, causing the outdoor air conditioner to frost. Generally, when the air conditioner is defrosting, the compressor needs to be turned off, the four-way valve flow direction needs to be converted, and then the compressor needs to be turned on again. The frost is removed by transferring the high-temperature refrigerant to the outdoor air conditioner. However, this operation needs to start and stop the compressor, and a large amount of energy is consumed in the process of starting and stopping the compressor, which is about five to six times of the normal operation. At the same time, frequent starting and stopping of the compressor also affects the service life of the compressor. Moreover, generally, when the air conditioner is defrosting, the indoor unit needs to be stopped, which affects the user experience.

[0003] Correspondingly, there is a need in the art for a new air conditioner to solve the problem that the existing air conditioner cannot heat the indoor unit when defrosting, resulting in poor user experience. SUMMARY

[0004] The present application aims to solve the above technical problems, i.e., to solve the problem that the existing air conditioner cannot heat the indoor unit when defrosting, resulting in poor user experience.

[0005] In a first aspect, the present application provides an air conditioner, comprising: a refrigerant circulation loop, and a compressor, an indoor heat exchanger and an outdoor heat exchanger arranged on the refrigerant circulation loop, wherein the outdoor heat exchanger comprises a first heat exchange zone and a second heat exchange zone which are separated from each other, the first heat exchange zone is arranged on the refrigerant circulation loop;

[0006] a refrigerant branch, one end of the refrigerant branch is arranged before an inlet of the first heat exchange zone, and the other end of the refrigerant branch is arranged after an outlet of the first heat exchange zone, and the second heat exchange zone is arranged on the refrigerant branch;

[0007] a first throttling valve and a second throttling valve, the first throttling valve is arranged before the inlet of the first heat exchange zone, and the second throttling valve is arranged after the outlet of the first heat exchange zone;

[0008] a third throttling valve and a fourth throttling valve, the third throttling valve is arranged before an inlet of the second heat exchange zone, and the fourth throttling valve is arranged after an outlet of the second heat exchange zone;

[0009] a fifth throttling valve, the fifth throttling valve is arranged on a pipeline between the indoor heat exchanger and the outdoor heat exchanger.

[0010] In the case of adopting the technical scheme, the air conditioner can realize the defrosting of the outdoor heat exchanger in the partitioned manner on the basis of continuously heating the indoor space by controlling the opening and closing of the throttling valves during the defrosting. When the air conditioner is running in the heating mode for defrosting, the air conditioner runs in the heating mode, a part of the high-temperature and high-pressure liquid refrigerant from the indoor heat exchanger enters one of the outdoor heat exchange areas for defrosting, and the other part of the high-temperature and high-pressure liquid refrigerant is throttled into low-temperature and low-pressure gas-liquid two-phase refrigerant and then enters the other outdoor heat exchange area for heat exchange with the outside, which plays the role of an evaporator. Due to the reduced defrosting area in a single defrosting, the defrosting effect of the outdoor unit is better. Moreover, the compressor can continuously heat, the start-stop frequency is reduced, the service life of the compressor is ensured, and the user experience during defrosting is improved.

[0011] In the optional technical scheme of the air conditioner, the first heat exchange area is arranged above the second heat exchange area.

[0012] In the case of adopting the technical scheme, in order to prevent the frost water after defrosting the upper heat exchange area from falling on the lower heat exchange area and causing the frost water to freeze again on the lower heat exchange area, the air conditioner can defrost the first heat exchange area above first and then defrost the second heat exchange area below. After the frost layer of the first heat exchange area is melted, even if the frost water flows to the second heat exchange area, the frost water can also be removed together when the second heat exchange area is defrosted.

[0013] The application further provides a control method of an air conditioner, wherein the air conditioner is the air conditioner according to any one of the technical schemes.

[0014] The control method comprises the following steps.

[0015] The air conditioner enters the heating defrosting mode.

[0016] The first throttling valve, the fourth throttling valve and the fifth throttling valve are all opened, the second throttling valve is closed, and the third throttling valve is throttled to defrost the first heat exchange area and to perform normal heat exchange on the second heat exchange area.

[0017] In the case of adopting the technical scheme, when the first heat exchange area is defrosted, the first throttling valve, the fourth throttling valve and the fifth throttling valve are all opened and do not play the role of throttling, the second throttling valve is closed, and the third throttling valve is partially opened to keep the role of throttling. A part of the high-temperature and high-pressure liquid refrigerant from the indoor heat exchanger defrosts the upper outdoor heat exchanger, and the other part of the high-temperature and high-pressure liquid refrigerant is throttled into low-temperature and low-pressure gas-liquid two-phase refrigerant by the third throttling valve and then enters the lower outdoor heat exchanger, which plays the role of an evaporator to continue heat absorption and runs together with the indoor unit to ensure continuous heating of the indoor space.

[0018] In the optional technical solution of the control method of the air conditioner, after the step of "opening the first throttling valve, the fourth throttling valve and the fifth throttling valve, closing the second throttling valve, throttling the third throttling valve to defrost the first heat exchange area and to perform normal heat exchange in the second heat exchange area", the control method further comprises:

[0019] controlling the second throttling valve, the third throttling valve and the fifth throttling valve to be opened, the fourth throttling valve to be closed, and the first throttling valve to be throttled to defrost the second heat exchange area and to perform normal heat exchange in the first heat exchange area.

[0020] In the above technical solution, when defrosting the second heat exchange area, the second throttling valve, the third throttling valve and the fifth throttling valve are controlled to be opened, the fourth throttling valve is controlled to be closed, and the first throttling valve is controlled to be partially opened and throttled, so that the high-temperature and high-pressure liquid refrigerant defrosts the second heat exchange area, and the first heat exchange area exchanges heat with the outside to maintain indoor heating.

[0021] In the optional technical solution of the control method of the air conditioner, after the step of "opening the first throttling valve, the fourth throttling valve and the fifth throttling valve, closing the second throttling valve, throttling the third throttling valve to defrost the first heat exchange area and to perform normal heat exchange in the second heat exchange area", the control method further comprises:

[0022] obtaining the temperature of the first heat exchange area;

[0023] when the temperature of the first heat exchange area is greater than a first preset temperature, controlling the second throttling valve, the third throttling valve and the fifth throttling valve to be opened, the fourth throttling valve to be closed, and the first throttling valve to be throttled to defrost the second heat exchange area and to perform normal heat exchange in the first heat exchange area.

[0024] In the above technical solution, when defrosting the first heat exchange area, the temperature of the first heat exchange area is detected, and when the temperature of the first heat exchange area is greater than a first preset temperature, it indicates that the frost layer of the first heat exchange area is melted and the defrosting is completed, and then the opening and closing of the throttling valve is switched to defrost the second heat exchange area.

[0025] In the optional technical solution of the control method of the air conditioner, after the step of "controlling the second throttling valve, the third throttling valve and the fifth throttling valve to be opened, the fourth throttling valve to be closed, and the first throttling valve to be throttled to defrost the second heat exchange area and to perform normal heat exchange in the first heat exchange area", the control method further comprises:

[0026] obtaining the temperature of the second heat exchange area;

[0027] when the temperature of the second heat exchange area is greater than a first preset temperature, controlling the air conditioner to run in a normal heating mode.

[0028] In the above technical solution, when the temperature of the second heat exchange zone is greater than the first preset temperature, it indicates that the defrosting of the second heat exchange zone is completed.

[0029] In the optional technical solution of the control method of the air conditioner, the control method further comprises:

[0030] The air conditioner enters a normal heating mode;

[0031] The first throttling valve, the second throttling valve, the third throttling valve and the fourth throttling valve are all opened, and the fifth throttling valve is throttled, so that the first heat exchange zone and the second heat exchange zone both perform normal heat exchange.

[0032] In the above technical solution, the fifth throttling valve is partially opened for throttling, and the other throttling valves are all opened, which does not play a throttling role, and the first heat exchange zone and the second heat exchange zone both play the role of evaporators and cooperate with the indoor unit to heat the indoor.

[0033] In the optional technical solution of the control method of the air conditioner, after the step of the air conditioner entering a heating defrosting mode, the control method comprises:

[0034] Controlling the compressor to increase the operating frequency.

[0035] In the above technical solution, after the air conditioner enters the heating defrosting mode, the frequency of the compressor is increased, so as to improve the defrosting efficiency and ensure the stability of the indoor temperature.

[0036] In the optional technical solution of the control method of the air conditioner, after the step of the air conditioner entering a heating defrosting mode, the control method further comprises:

[0037] Obtaining the cumulative operating duration of the heating defrosting mode;

[0038] When the operating duration exceeds the preset duration, it is determined that the defrosting of the first heat exchange zone or the second heat exchange zone is completed.

[0039] In the above technical solution, whether the defrosting is completed is determined by obtaining the cumulative operating duration of the defrosting mode.

[0040] The application further provides a control method of an air conditioner, wherein the air conditioner comprises the air conditioner according to any one of the above technical solutions.

[0041] The control method comprises:

[0042] The air conditioner enters a heating defrosting mode;

[0043] The first throttle valve, the fourth throttle valve and the fifth throttle valve are all opened, the second throttle valve is closed, and the third throttle valve is throttled to defrost the first heat exchange zone and to perform normal heat exchange in the second heat exchange zone.

[0044] The air conditioner of the present application comprises a refrigerant circulation loop, and a compressor, an indoor heat exchanger and an outdoor heat exchanger arranged on the refrigerant circulation loop, wherein the outdoor heat exchanger comprises a first heat exchange zone and a second heat exchange zone separated from each other, the first heat exchange zone is arranged on the refrigerant circulation loop; further comprising a refrigerant branch, one end of the refrigerant branch is arranged before the inlet of the first heat exchange zone, and the other end is arranged after the outlet of the first heat exchange zone, the second heat exchange zone is arranged on the refrigerant branch; further comprising a first throttle valve and a second throttle valve, the first throttle valve is arranged before the inlet of the first heat exchange zone, and the second throttle valve is arranged after the outlet of the first heat exchange zone; further comprising a third throttle valve and a fourth throttle valve, the third throttle valve is arranged before the inlet of the second heat exchange zone, and the fourth throttle valve is arranged after the outlet of the second heat exchange zone; further comprising a fifth throttle valve, the fifth throttle valve is arranged on the pipeline between the indoor heat exchanger and the outdoor heat exchanger.

[0045] In the case of adopting the above technical scheme, the air conditioner of the present application can realize partition defrosting of the outdoor heat exchanger on the basis of continuous heating of the indoor on the basis of the opening and closing control of the throttle valve during defrosting. When the air conditioner operates in heating defrosting, the air conditioner operates in heating, and part of the high-temperature and high-pressure liquid refrigerant from the indoor heat exchanger enters one of the outdoor heat exchange zones for defrosting, and the other part of the high-temperature and high-pressure liquid refrigerant is throttled into low-temperature and low-pressure gas-liquid two-phase refrigerant and then enters the other outdoor heat exchange zone for heat exchange with the outside, which plays the role of an evaporator. Due to the reduced defrosting area in a single defrosting, the defrosting effect of the outdoor unit is better. Moreover, the compressor can maintain continuous heating, reduce the start-stop frequency, and thus ensure the normal service life of the compressor and improve the user's experience during defrosting. BRIEF DESCRIPTION OF DRAWINGS

[0046] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0047] Figure 1 is a structural schematic diagram of the air conditioner of the present application;

[0048] Figure 2 is a sectional schematic diagram of the outdoor heat exchanger of the present application;

[0049] Figure 3 is a main step flow chart of the control method of the air conditioner of the present application;

[0050] Figure 4 is a specific step flow chart of the control method of the air conditioner of the present application.

[0051] List of reference numerals:

[0052] 1 compressor; 2 four-way valve; 3 indoor heat exchanger; 41 first heat exchange zone; 42 second heat exchange zone;

[0053] 5 refrigerant circulation loop;

[0054] 6 refrigerant branch;

[0055] 71 first throttle valve; 72 second throttle valve; 73 third throttle valve; 74 fourth throttle valve; 75 fifth throttle valve. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0057] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "up", "down", "left", "right" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0058] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] Reference Figure 1 and Figure 2To solve the problem that the existing air conditioner cannot heat the indoor when defrosting, resulting in poor user experience. The present application provides an air conditioner comprising an indoor unit and an outdoor unit and a refrigerant circulation loop 5 arranged between the indoor unit and the outdoor unit, the indoor unit comprising an indoor heat exchanger 3, the outdoor unit comprising an outdoor heat exchanger, a four-way valve 2, a fan and a compressor 1. The compressor 1, the four-way valve 2, the indoor heat exchanger 3 and the outdoor heat exchanger are arranged on the refrigerant circulation loop 5, and the refrigerant circulates between the indoor and the outdoor through the refrigerant circulation loop 5 to exchange heat with the indoor environment through the indoor unit, thereby meeting the heat exchange needs of the user, and the fan is used for heat dissipation and air flow acceleration of the outdoor unit. During use, the user can control the operation of the air conditioner by setting the temperature.

[0060] The outdoor heat exchanger comprises a first heat exchange area 41 and a second heat exchange area 42 which are spaced apart from each other, the first heat exchange area 41 is arranged on the refrigerant circulation loop 5, and the first heat exchange area 41 is located above the second heat exchange area 42. Specifically, the first heat exchange area 41 comprises a first heat exchange pipe group, and the second heat exchange area 42 comprises a second heat exchange pipe group. The first heat exchange pipe group and the second heat exchange pipe group are not connected.

[0061] Continuing to refer to Figure 1 , the air conditioner further comprises a refrigerant branch 6, one end of the refrigerant branch 6 is arranged on the pipeline before the inlet of the first heat exchange area 41, and the other end is arranged on the pipeline after the outlet of the first heat exchange area 41, and the second heat exchange area 42 is arranged on the refrigerant branch 6.

[0062] The air conditioner further comprises a first throttling valve 71 and a second throttling valve 72 arranged on the refrigerant circulation loop 5, the first throttling valve 71 is arranged before the inlet of the first heat exchange area 41, and the second throttling valve 72 is arranged after the outlet of the first heat exchange area 41;

[0063] The air conditioner further comprises a third throttling valve 73 and a fourth throttling valve 74 arranged on the refrigerant branch 6, the third throttling valve 73 is arranged before the inlet of the second heat exchange area 42, and the fourth throttling valve 74 is arranged after the outlet of the second heat exchange area 42;

[0064] The air conditioner further comprises a fifth throttling valve 75 arranged on the pipeline between the indoor heat exchanger 3 and the outdoor heat exchanger.

[0065] The refrigerant circulation loop 5 is that when the air conditioner is in normal heating, the low-temperature and low-pressure gaseous refrigerant is compressed into high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant is cooled and condensed into high-temperature and high-pressure liquid refrigerant in the indoor heat exchanger 3 (condenser), the high-temperature and high-pressure liquid refrigerant is throttled into low-temperature and low-pressure gas-liquid two-phase refrigerant by the throttling valve, the low-temperature and low-pressure gas-liquid two-phase refrigerant absorbs heat and evaporates into low-temperature and low-pressure gaseous refrigerant in the outdoor heat exchanger (evaporator), and the gaseous refrigerant is sucked into the compressor 1 for compression to enter the next cycle. In the whole process, the refrigerant releases heat in the indoor heat exchanger 3 and absorbs heat in the outdoor heat exchanger, so as to achieve the purpose of heating.

[0066] In the defrosting process of the air conditioner, the opening and closing of the throttling valve are controlled, so that the outdoor heat exchanger is defrosted in a partitioned manner on the basis of continuous heating in the room. When the air conditioner is in heating and defrosting, the air conditioner is in heating, a part of the high-temperature and high-pressure liquid refrigerant from the indoor heat exchanger 3 enters one of the outdoor heat exchange areas for defrosting, and the other part of the high-temperature and high-pressure liquid refrigerant is throttled into low-temperature and low-pressure gas-liquid two-phase refrigerant and then enters another outdoor heat exchange area to exchange heat with the outside, which plays the role of an evaporator. Due to the reduced defrosting area in a single defrosting, the defrosting effect of the outdoor unit is better. Moreover, the compressor can maintain continuous heating, reduce the start-stop frequency, and thus ensure the normal service life of the compressor 1 and improve the user experience during defrosting.

[0067] In addition, in order to prevent the frost water after defrosting the upper heat exchange area from falling on the lower heat exchange area and causing the frost water to freeze again in the lower heat exchange area, the air conditioner can first defrost the first heat exchange area 41 above and then defrost the second heat exchange area 42 below. After the frost layer of the first heat exchange area 41 is melted, even if the frost water flows to the second heat exchange area 42, it can also be removed together when the second heat exchange area 42 is defrosted.

[0068] Further, the air conditioner further comprises a temperature sensor and a controller. The temperature sensor can detect the temperature of the outdoor heat exchanger, and there is no limitation on the detection position of the outdoor heat exchanger, which can be set by the person skilled in the art as needed. The controller can obtain the temperature of the outdoor heat exchanger, and the controller can also control the operating state of the air conditioner, for example, control the start-stop of the outdoor unit and control the frequency of the compressor 1, etc. It can be understood by the person skilled in the art that the specific structure and model of the controller are not limited in the present application, and the structure and model of the controller can be set by the person skilled in the art according to the actual use requirement.

[0069] The present application also provides a control method of the air conditioner. In one possible implementation manner, the control method is described with reference to Figure 3 , and the control method mainly comprises the following steps:

[0070] Step S10: The air conditioner enters a heating and defrosting mode;

[0071] Step S20: the first throttle valve, the fourth throttle valve and the fifth throttle valve are all opened, the second throttle valve is closed, and the third throttle valve is throttled to defrost the first heat exchange area and to perform normal heat exchange on the second heat exchange area.

[0072] The user sends a defrost mode operation instruction to the air conditioner through a key or a remote controller when using the air conditioner, and the air conditioner enters the defrost mode after receiving the defrost mode operation instruction. The air conditioner defrosts while heating. Specifically, when defrosting the first heat exchange area 41, the first throttle valve 71, the fourth throttle valve 74 and the fifth throttle valve 75 are all opened and do not throttle, the second throttle valve 72 is closed, and the third throttle valve 73 is partially opened to maintain the throttling effect. The high-temperature and high-pressure liquid refrigerant at the outlet of the indoor heat exchanger 3 is partially used to defrost the upper half of the outdoor heat exchanger, and the other part is throttled by the third throttle valve 73 into low-temperature and low-pressure gas-liquid two-phase refrigerant to enter the lower half of the outdoor heat exchanger. The lower half of the outdoor heat exchanger functions as an evaporator to continue to absorb heat and operates with the indoor unit to ensure continuous heating in the room.

[0073] Reference Figure 4 In a possible implementation, the specific steps of the control method are as follows:

[0074] Step S31: the air conditioner enters the heating and defrosting mode;

[0075] Step S32: the first throttle valve, the fourth throttle valve and the fifth throttle valve are all opened, the second throttle valve is closed, and the third throttle valve is throttled to defrost the first heat exchange area and to perform normal heat exchange on the second heat exchange area;

[0076] Step S33: the temperature of the first heat exchange area is obtained;

[0077] Step S34: when the temperature of the first heat exchange area is greater than a first preset temperature, the second throttle valve, the third throttle valve and the fifth throttle valve are all controlled to be opened, the fourth throttle valve is controlled to be closed, and the first throttle valve is throttled to defrost the second heat exchange area and to perform normal heat exchange on the first heat exchange area;

[0078] Step S35: the temperature of the second heat exchange area is obtained;

[0079] Step S36: when the temperature of the second heat exchange area is greater than the first preset temperature, the air conditioner is controlled to operate in the normal heating mode;

[0080] Step S37: the first throttle valve, the second throttle valve, the third throttle valve, the fourth throttle valve are all controlled to be opened, and the fifth throttle valve is throttled to make the first heat exchange area and the second heat exchange area perform normal heat exchange.

[0081] Steps S33 to S37, when defrosting the first heat exchange area 41, the temperature of the first heat exchange area 41 is detected, when the temperature of the first heat exchange area 41 is greater than the first preset temperature, it indicates that the frost layer of the first heat exchange area 41 is melted, the defrosting is completed, then the opening and closing of the throttling valve is switched to defrost the second heat exchange area 42. When defrosting the second heat exchange area 42, the second throttling valve 72, the third throttling valve 73 and the fifth throttling valve 75 are all opened, the fourth throttling valve 74 is closed, the first throttling valve 71 is partially opened for throttling, the high-temperature and high-pressure liquid refrigerant defrosts the second heat exchange area 42, and the first heat exchange area 41 exchanges heat with the outside. Similarly, when the temperature of the second heat exchange area 42 is greater than the first preset temperature, it indicates that the defrosting of the second heat exchange area 42 is completed. The opening and closing of the throttling valve is switched, and the air conditioner runs in the conventional heating mode to provide heat for the indoor. Among them, the fifth throttling valve 75 is partially opened for throttling, the first heat exchange area 41 and the second heat exchange area 42 all act as evaporators, and cooperate with the indoor unit to heat the indoor.

[0082] Of course, in addition to the above, the skilled person in the art can also judge whether the defrosting is completed by obtaining the cumulative running time of the defrosting mode by detecting the temperature of the first heat exchange area 41 and the second heat exchange area 42. The specific steps include:

[0083] Step: obtain the cumulative running time of the heating defrosting mode;

[0084] Step: when the running time exceeds the preset time, it is determined that the defrosting of the first heat exchange area or the second heat exchange area is completed.

[0085] After the air conditioner enters the heating defrosting mode, the frequency of the compressor 1 is increased, thereby improving the defrosting efficiency and ensuring the stability of the indoor temperature.

[0086] It should be noted that, although in order to better defrosting effect, the present application is to the upper part of the outdoor heat exchanger part defrosting, and then to the lower part of the outdoor heat exchanger part defrosting, in order to prevent the water after defrosting from falling on the lower part of the outdoor heat exchanger and freezing. However, this is not intended to limit the defrosting sequence of the upper and lower parts, and the skilled person in the art can also defrost the lower part first and then the upper part according to the actual needs, and the present application does not make any limitation, and all falls within the protection scope of the present application. In addition, although the present application is described with the first heat exchange area 41 and the second heat exchange area 42 arranged in the upper and lower positions, the skilled person can know that the first heat exchange area 41 and the second heat exchange area 42 can also be arranged in the left and right positions, and all fall within the protection scope of the present application.

[0087] In summary, the air conditioner of the present application can realize the zoning defrosting of the outdoor heat exchanger while heating, which can reduce the start-stop frequency of the compressor 1, maintain the indoor heating during defrosting, ensure the normal service life of the compressor 1, and improve the user experience.

[0088] As described in the first paragraph of this section, the above-mentioned embodiments are only used to illustrate the principles of the present application and are not intended to limit the protection scope of the present application. Those skilled in the art can adjust the above-mentioned structure without departing from the principles of the present application, so that the present application can be applied to more specific application scenarios.

[0089] In addition, the air conditioner of the present application further comprises a memory and a processor, the memory is adapted to store a plurality of program codes, the program codes are adapted to be loaded and run by the processor to execute the control method of the air conditioner described in any of the above-mentioned embodiments.

[0090] Those skilled in the art can understand that the above-mentioned air conditioner also comprises some other well-known structures, the memory includes but is not limited to random access memory, flash memory, read-only memory, programmable read-only memory, volatile memory, non-volatile memory, serial memory, parallel memory or register, etc., and the processor includes but is not limited to CPLD / FPGA, DSP, ARM processor, MIPS processor, etc. In order not to unnecessarily obscure the embodiments of the present disclosure, these well-known structures are not shown in the drawings.

[0091] Although the steps in the above-mentioned embodiments are described in the above-mentioned order, those skilled in the art can understand that, in order to achieve the effect of the present embodiment, the different steps do not have to be executed in such an order, and they can be executed simultaneously (in parallel) or in a reversed order. For example, those skilled in the art can set the order of the steps as needed, and all of them fall within the protection scope of the present application.

[0092] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. A control method of an air conditioner, characterized by, The air conditioner comprises: A refrigerant circulation loop, and a compressor, an indoor heat exchanger and an outdoor heat exchanger arranged on the refrigerant circulation loop, wherein the outdoor heat exchanger comprises a first heat exchange zone and a second heat exchange zone which are separated from each other, the first heat exchange zone is arranged on the refrigerant circulation loop; A refrigerant branch, one end of the refrigerant branch is arranged before an inlet of the first heat exchange zone, and the other end of the refrigerant branch is arranged after an outlet of the first heat exchange zone, the second heat exchange zone is arranged on the refrigerant branch, and the first heat exchange zone is arranged above the second heat exchange zone; A first throttling valve and a second throttling valve, the first throttling valve is arranged before the inlet of the first heat exchange zone, and the second throttling valve is arranged after the outlet of the first heat exchange zone; A third throttling valve and a fourth throttling valve, the third throttling valve is arranged before an inlet of the second heat exchange zone, and the fourth throttling valve is arranged after an outlet of the second heat exchange zone; A fifth throttling valve, the fifth throttling valve is arranged on a pipeline between the indoor heat exchanger and the outdoor heat exchanger; The control method comprises: The air conditioner enters a heating defrosting mode; The first throttling valve, the fourth throttling valve and the fifth throttling valve are all opened, the second throttling valve is closed, the third throttling valve is throttled to defrost the first heat exchange zone, and the second heat exchange zone is used for normal heat exchange; The second throttling valve, the third throttling valve and the fifth throttling valve are all controlled to be opened, the fourth throttling valve is closed, the first throttling valve is throttled to defrost the second heat exchange zone, and the first heat exchange zone is used for normal heat exchange.

2. The control method of the air conditioner according to claim 1, characterized by, After the step of "the first throttling valve, the fourth throttling valve and the fifth throttling valve are all opened, the second throttling valve is closed, the third throttling valve is throttled to defrost the first heat exchange zone, and the second heat exchange zone is used for normal heat exchange", the control method further comprises: Obtaining a temperature of the first heat exchange zone; When the temperature of the first heat exchange zone is greater than a first preset temperature, the second throttling valve, the third throttling valve and the fifth throttling valve are all controlled to be opened, the fourth throttling valve is closed, and the first throttling valve is throttled to defrost the second heat exchange zone and the first heat exchange zone is used for normal heat exchange.

3. The control method of the air conditioner according to claim 2, characterized by, After the step of "the second throttling valve, the third throttling valve and the fifth throttling valve are all controlled to be opened, the fourth throttling valve is closed, and the first throttling valve is throttled to defrost the second heat exchange zone and the first heat exchange zone is used for normal heat exchange", the control method further comprises: Obtaining a temperature of the second heat exchange zone; When the temperature of the second heat exchange zone is greater than the first preset temperature, the air conditioner is controlled to run in a normal heating mode.

4. The control method of the air conditioner according to claim 1, wherein The control method further comprises: The air conditioner enters a normal heating mode; The first throttling valve, the second throttling valve, the third throttling valve and the fourth throttling valve are all controlled to be opened, and the fifth throttling valve is throttled to make the first heat exchange zone and the second heat exchange zone all perform normal heat exchange.

5. The control method of the air conditioner according to claim 1, wherein After the step of "the air conditioner enters a heating defrosting mode", the control method comprises: The compressor is controlled to increase the running frequency.

6. The control method of the air conditioner according to claim 1, wherein After the step of "the air conditioner enters a heating defrosting mode", the control method further comprises: acquiring a cumulative running time length of the heating defrosting mode; when the running time length exceeds a preset time length, it is determined that the first heat exchange area or the second heat exchange area is defrosted.

Images