Air conditioner and refrigeration control method thereof

Abstract

The present invention discloses an air conditioner and a refrigeration control method for the air conditioner. The air conditioner includes an indoor unit, the indoor unit including a first drive fan and a second drive fan; a heat exchange system including an indoor heat exchange module, a first refrigerant flow path control module, and a second refrigerant flow path control module. The indoor heat exchange module includes a first indoor heat exchanger group and a second indoor heat exchanger group. The first refrigerant flow path control module includes multiple liquid inlet branches and at least one indoor throttle valve, each liquid inlet branch being used to transport refrigerant to the first indoor heat exchanger group and the second indoor heat exchanger group, respectively. At least one liquid inlet branch connected to the second indoor heat exchanger group is provided with an indoor throttle valve. The second refrigerant flow path control module is used to return refrigerant from the first indoor heat exchanger group and the second indoor heat exchanger group. The air conditioner of the present invention can discharge airflows of different temperatures through different air outlets to meet different user needs.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a refrigeration control method for the air conditioner. Background Art

[0002] Air conditioning, also known as air conditioner, refers to a device that uses artificial means to quickly adjust and control parameters such as the ambient temperature within a building or structure.

[0003] Current air conditioners have only one air outlet, through which only high-speed wind, medium-speed wind, low-speed wind and other air flows can flow out. Different cooling modes cannot be adjusted at the same time, and the needs of users cannot be met. Summary of the Invention

[0004] In order to solve at least one problem existing in the above-mentioned prior art, according to one aspect of the present invention, an air conditioner is provided, comprising: an indoor unit, the indoor unit comprising a first drive fan for upward air supply and a second drive fan for downward air supply; a heat exchange system, comprising an indoor heat exchange module, a first refrigerant flow path control module and a second refrigerant flow path control module, the indoor heat exchange module comprising a first indoor heat exchanger group for upward air supply heat exchange and a second indoor heat exchanger group for downward air supply heat exchange, the first refrigerant flow path control module comprising a plurality of liquid inlet branches and at least one indoor throttle valve, each of the liquid inlet branches being respectively used to transport refrigerant to the first indoor heat exchanger group and the second indoor heat exchanger group, and at least one liquid inlet branch connected to the second indoor heat exchanger group is provided with an indoor throttle valve, and the second refrigerant flow path control module is used to reflux the refrigerant of the first indoor heat exchanger group and the second indoor heat exchanger group.

[0005] In this way, the refrigerant is circulated through the compressor, and the flow is controlled by the outdoor throttle valve. The first control module of the refrigerant flow path introduces refrigerant to the first indoor heat exchanger group and the second indoor heat exchanger group. The second indoor heat exchanger group can be controlled by the indoor throttle valve to flow different refrigerant flow rates, so that the upper air outlet and the lower air outlet of the indoor unit can blow out air flows of different temperatures. When different cooling air outlet effects are required, different refrigerant flow rates can be introduced into the first indoor heat exchanger group and the second indoor heat exchanger group, so that the first drive fan and the second drive fan can blow out air flows of different temperatures to the upper air outlet and the lower air outlet to meet different user needs. For example, the upper air outlet blows out a lower temperature air flow; the lower air outlet blows out a lower temperature and soothing air flow, so that the user can feel the soothing air flow; the refrigerant passes through the first control module of the refrigerant flow path to the first indoor heat exchanger group and the second indoor heat exchanger group, and then flows back to the compressor through the second control module of the refrigerant flow path for the next refrigeration cycle.

[0006] In some embodiments, the first refrigerant flow path control module further includes a first liquid distributor, which is connected to the indoor heat exchange module to form a plurality of liquid inlet branches.

[0007] In this way, the refrigerant is evenly dispersed to each liquid inlet branch through the first liquid distributor, so that the refrigerant can be more evenly distributed to each liquid inlet branch, so that the flow of each refrigerant entering the indoor heat exchanger is more uniform, the heat exchange in the indoor heat exchanger is more uniform, and the heat exchange efficiency is higher.

[0008] In some embodiments, the first indoor heat exchanger group and the second indoor heat exchanger group are arranged side by side from top to bottom in the indoor unit, and the number of second indoor heat exchangers in the second indoor heat exchanger group is greater than the number of first indoor heat exchangers in the first indoor heat exchanger group.

[0009] In this way, according to the different number settings of the heat exchanger groups, different refrigerant flow rates can flow in, and the corresponding air outlets can provide air flows of different temperatures.

[0010] In some embodiments, the indoor unit further includes a telescopic structure, which is movably connected relative to the indoor unit to form a movable upper air outlet on the top of the indoor unit.

[0011] In this way, a telescopic structure is movably connected to the top of the indoor unit. By expanding and contracting the telescopic structure relative to the body of the indoor unit, the size of the upper air outlet can be controlled, and the distance of the airflow flowing out of the upper air outlet can be controlled. For example, when the opening of the upper air outlet is larger, the airflow can flow farther and cover a larger range; when the opening of the upper air outlet is smaller, the airflow flows closer and covers a smaller range.

[0012] In some embodiments, the liquid inlet branch provided with the indoor throttle valve is divided into a plurality of sub-flow paths, and each of the sub-flow paths is connected one by one to the second indoor heat exchanger in the second indoor heat exchanger group.

[0013] In this way, since the liquid refrigerant has pressure loss in the pipeline, the liquid inlet branch equipped with an indoor throttle valve is divided into multiple sub-flow paths. It first flows through an inlet branch and then is divided into each sub-flow path to reduce the pressure loss during the flow of the refrigerant and ensure the cooling and heat exchange effect of the refrigerant. At the same time, the installation volume of the pipeline can be reduced, making the air-conditioning installation structure more compact.

[0014] In a second aspect, the present invention further provides a cooling control method for an air conditioner, comprising: obtaining the current indoor ambient temperature T n ; Determine the indoor ambient temperature T n and the preset indoor ambient temperature value T0; if T n<T0, the indoor throttle valve controls the refrigerant flow rate flowing into the second indoor heat exchanger group to be smaller than the refrigerant flow rate flowing into the first indoor heat exchanger group.

[0015] In this way, when the indoor ambient temperature T is detected n When <T0, the adjustment of various components in the indoor unit is completed. At this time, the compressor, indoor throttle valve and the second driving fan can be adjusted to make the lower air outlet blow out a soothing air flow, which can prevent the high-speed and low-temperature air flow from blowing directly to the user, achieve the effect of preventing direct blowing, and enhance the user's comfort.

[0016] In some embodiments, if T n <T0, the cooling control method of the air conditioner further includes: keeping the rotation speed of the first driving fan unchanged, and adjusting the rotation speed of the second driving fan to a preset rotation speed R0.

[0017] In this way, since the user can turn on the first driven fan in a quiet and comfortable state when the indoor unit of the air conditioner is turned on, there is no need to adjust the speed of the first driven fan. In addition, the air outlet corresponding to the first driven fan is the upper air outlet, which is located above the air conditioner body and causes less discomfort to the user than the lower air outlet that blows directly toward the user. Therefore, there is no need to adjust the speed of the first driven fan. At the same time, since a more soothing air flow is required to be blown out through the lower air outlet, it is necessary to adjust the second driven fan to the preset speed R0 at this time, so that a soothing air flow is blown out into the lower air outlet at the preset speed R0.

[0018] In some embodiments, after the step of maintaining the speed of the first driving fan unchanged and adjusting the speed of the second driving fan to a preset speed R0, the cooling control method of the air conditioner further includes: obtaining the current operating frequency f of the compressor, the current speed R1 of the first driving fan, and the current outdoor ambient temperature T 外 , and according to the current speed R1 of the first driving fan and the current outdoor ambient temperature T 外 , calculate the operating frequency f that the compressor needs to adjust F ; Among them, f F =f*a+b, where a is the percentage of the compressor to be adjusted relative to the current operating frequency f when the first driving fan is in different speed modes, and the magnitude of a is positively correlated with the current speed R1 of the first driving fan; b is the first driving fan in different speed modes and at different current outdoor ambient temperatures T 外 When the frequency compensation number of the operating frequency of the compressor is adjusted, the magnitude of b is respectively related to the current speed R1 of the first driving fan and the outdoor ambient temperature T 外There is a positive correlation.

[0019] In this way, by adjusting the operating frequency f of the compressor 211, it is possible to ensure a comfortable airflow, save energy, and improve the reliability of the refrigeration system operation in the air conditioner.

[0020] In some embodiments, after the step of calculating the operating frequency fF that needs to be adjusted for the compressor, the refrigeration control method of the air conditioner further includes: obtaining the current opening k of the outdoor throttle valve; calculating the difference between fF and f, and obtaining the compensation coefficient c required for the indoor throttle valve according to different blowing modes of the first driving fan, and calculating the opening value KF required for the indoor throttle valve; wherein, kF=k-(f-fF)*c, wherein the size of the c value is positively correlated with the current speed R1 of the first driving fan.

[0021] In this way, by adjusting the opening k of the indoor throttle valve F Able to blow out comfortable airflow from the downward air outlet.

[0022] In some embodiments, if T n > T0, the same refrigerant flow rate flows into the first indoor heat exchanger group and the second indoor heat exchanger group.

[0023] In this way, due to the indoor ambient temperature T n The temperature is still relatively high, and the indoor unit needs to blow out a lower temperature to achieve the effect of cooling the room. Therefore, the same refrigerant flow is introduced into the first indoor heat exchanger group and the first indoor heat exchanger group at this time, so that the lower air outlet also has the effect of blowing out cold air with a lower temperature, so as to quickly cool the indoor environment through the upper air outlet and the lower air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of an air conditioner according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 The structural diagram of the indoor unit in FIG;

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the heat exchange system;

[0027] Figure 4 Flowchart of a cooling control method for an air conditioner in an embodiment of the present invention.

[0028] The meanings of the reference numerals are as follows:

[0029] air conditioner 100;

[0030] Indoor unit 10, upper air outlet 11, lower air outlet 12, first driving fan 13, second driving fan 14, telescopic structure 15;

[0031] Heat exchange system 20, indoor heat exchange module 21, compressor 211, outdoor throttle valve 212, outdoor heat exchanger 213, first indoor heat exchanger group 214, second indoor heat exchanger group 215, first refrigerant flow control module 22, liquid inlet branch 221, sub-flow path 2221, indoor throttle valve 222, first liquid distributor 223, second refrigerant flow control module 23, liquid return branch 231, sub-circuit 2311, second liquid distributor 232;

[0032] Control device 30. DETAILED DESCRIPTION

[0033] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] See also Figures 1 to 3 , an air conditioner 100 provided in a first embodiment of the present invention includes an indoor unit 10 and a heat exchange system 20.

[0038] Among them, the indoor unit 10 has an upper air outlet 11, a lower air outlet 12, a first drive fan 13 and a second drive fan 14, the upper air outlet 11 is located above the lower air outlet 12, the first drive fan 13 is used to supply air upward to the upper air outlet 11, and the second drive fan 14 is used to supply air downward to the lower air outlet 12; the heat exchange system 20 includes an indoor heat exchange module 21, a first refrigerant flow path control module 22 and a second refrigerant flow path control module 23; the indoor heat exchange module 21 is used for refrigerant circulation, including a compressor 211, an outdoor throttle valve 212, an outdoor heat exchanger 213, a first indoor heat exchanger group 214 and a second indoor heat exchanger group 215 connected in sequence, the first indoor heat exchanger group 214 is located at the upper air outlet 11, the second The indoor heat exchanger group 215 is arranged at the lower air outlet 12; the first refrigerant flow control module 22 is used to direct the refrigerant to the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215, including multiple liquid inlet branches 221 and at least one indoor throttle valve 222, each liquid inlet branch 221 is respectively connected to the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215 one by one, and at least one liquid inlet branch 221 connected to the second indoor heat exchanger group 215 is provided with an indoor throttle valve 222; the second refrigerant flow control module 23 includes multiple return liquid branches 231, each return liquid branch 231 is respectively connected to the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215 one by one, and is used to return the refrigerant to the compressor 211.

[0039] The air conditioner 100 circulates the refrigerant through the compressor 221 and controls the flow rate through the outdoor throttle valve 212. The refrigerant flow path first control module 22 passes the refrigerant to the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215. The second indoor heat exchanger group 215 can be controlled by the indoor throttle valve 222 to flow different refrigerant flows, so that the upper air outlet 12 and the lower air outlet 13 of the indoor unit 10 can blow out air flows of different temperatures. When different cooling air outlet effects are required, the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215 can be passed through. Different refrigerant flow rates are input, so that the first drive fan 13 and the second drive fan 14 can blow out air flows of different temperatures to the upper air outlet 11 and the lower air outlet 12 to meet different user needs. For example, the upper air outlet 11 blows out air flows with lower temperature; the lower air outlet 112 blows out soothing air flows with lower temperature, so that the user can feel the soothing air flow; the refrigerant passes through the first control module 22 of the refrigerant flow path to the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215, and then flows back to the compressor 211 through the second control module 23 of the refrigerant flow path for the next refrigeration cycle.

[0040] See also Figure 2In one embodiment of the present invention, in order to adjust the air outlet distance of the upper air outlet 11, the indoor unit 10 further includes a telescopic structure 15, which is movably connected to the top of the indoor unit 10 to form a movable upper air outlet 11 at the top of the indoor unit 10. By movably connecting the telescopic structure 15 to the top of the indoor unit 10, the telescopic structure 15 can be extended and retracted relative to the body of the indoor unit 10 to control the size of the upper air outlet 11 and the distance of the airflow flowing out of the upper air outlet 11. For example, when the opening of the upper air outlet 11 is larger, the airflow can flow farther and cover a wider range; when the opening of the upper air outlet 11 is smaller, the airflow flows closer and covers a smaller range.

[0041] Specifically, the telescopic structure 15 can be movable relative to the indoor unit 10 by sliding up and down, or by rotating. When it is extended and retracted by sliding up and down relative to the indoor unit 10, the telescopic structure 15 in the retracted state can become one with the indoor unit 10. When it is retracted by rotating relative to the indoor unit 10, the telescopic structure 15 can be rotated to one side of the indoor unit 10, or integrated with the indoor unit 10 after rotation. This is not limited here.

[0042] In one embodiment of the present invention, see Figure 2 and Figure 3 The first indoor heat exchanger group 214 and the first indoor heat exchanger group 215 are arranged side by side from top to bottom. The number of second indoor heat exchangers in the second indoor heat exchanger group 215 is less than the number of first indoor heat exchangers in the first indoor heat exchanger group 214. Multiple first indoor heat exchangers and multiple second indoor heat exchangers are arranged in parallel. Thus, depending on the number of heat exchanger groups, different refrigerant flow rates can flow in, and corresponding airflows of different temperatures can be provided at the air outlets. For example, in this embodiment, the second indoor heat exchanger group 214 has a greater number of second indoor heat exchangers, which can perform a greater amount of heat exchange and provide a lower temperature airflow.

[0043] Among them, please read Figure 3 In one embodiment of the present invention, the first refrigerant flow control module 22 also includes a first liquid distributor 223, which is connected to the indoor heat exchange module 21, is arranged on the outlet of the compressor 221, and forms a liquid inlet branch 221, so that the refrigerant is evenly dispersed to each liquid inlet branch 221 through the first liquid distributor 223, which can make the refrigerant more evenly distributed to each liquid inlet branch 221, so that the flow rate of each refrigerant entering the indoor heat exchanger is more uniform, the heat exchange in the indoor heat exchanger is more uniform, and the heat exchange efficiency is higher.

[0044] Specifically, the first liquid separator 223 in this embodiment divides into three liquid inlet branches 221, two of which are connected to the first indoor heat exchanger group 214, and one liquid inlet branch 221 is connected to the first indoor heat exchanger group 215. In other embodiments, different numbers of liquid inlet branches 221 can be set as needed.

[0045] Among them, the liquid inlet branch 221 provided with an indoor throttle valve 222 is further divided into multiple sub-flow paths 2211, and each sub-flow path 2211 is connected one by one to the second indoor heat exchanger in the second indoor heat exchanger group 215. Since the liquid refrigerant has pressure loss in the pipeline, the liquid inlet branch 221 provided with the indoor throttle valve 22 is further divided into multiple sub-flow paths 2211. It first flows through an inlet branch 221 and then is divided into each sub-flow path 2211 to reduce the pressure loss during the flow of the refrigerant and ensure the cooling and heat exchange effect of the refrigerant; at the same time, it can reduce the installation volume of the pipeline, making the air-conditioning installation structure more compact.

[0046] Specifically, this embodiment includes three sub-flow paths 2211, each sub-flow path 2211 corresponds to a second indoor heat exchanger, and the liquid inlet branch 221 in which the indoor throttle valve 222 is not provided is connected to each first indoor heat exchanger to allow the refrigerant to flow into each indoor heat exchanger.

[0047] See also Figure 3 The second control module 23 of the refrigerant flow path includes three return liquid branches 231, so that the number of the return liquid branches 231 corresponds to the number of the inlet liquid branches 221; it also includes a second liquid distributor 232, so that the refrigerant flows out of the two second indoor heat exchangers and flows to the return liquid branch 231, and the return liquid branch 231 flows to the second liquid distributor 232 and then flows back to the compressor 221 in the indoor heat exchange module 21.

[0048] It can be understood that since the refrigerant evaporates from liquid to gas after passing through the indoor heat exchanger, the flow pressure difference loss in the return liquid pipe is very small. In this embodiment, two of the three return liquid branches 231 are divided into a sub-circuit 2311, which makes the pipeline installation more compact and occupies less space, and allows various structures to be reasonably arranged in the indoor unit 10.

[0049] It can be understood that the air conditioner 100 in this embodiment can also include a control device 30; the control device 30 is electrically connected to the indoor heat exchange module 21, the first refrigerant flow control module 22 and the second refrigerant flow control module 23, respectively, for obtaining indoor and outdoor temperatures, and controlling the different working modes of the first refrigerant flow control module 22, the second refrigerant flow control module 23, the compressor 221 and the outdoor throttle valve 212. Thus, the control device 30 is electrically connected to the first control module 22 of the refrigerant flow path, the second control module 23 of the refrigerant flow path, the compressor 221 and the outdoor throttle valve 212 respectively, so as to obtain indoor and outdoor temperatures, thereby controlling different working modes of the first control module 22 of the refrigerant flow path, the second control module 23 of the refrigerant flow path, the compressor 221 and the outdoor throttle valve 212, such as controlling the operating frequency of the compressor 221, the opening of the outdoor throttle valve 212, the opening of the indoor regulating valve 222, or controlling different refrigerant flow rates in the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215.

[0050] Among them, the control device 30 in this embodiment is set on the indoor unit 10, for example, on the body. In other embodiments, it can also be set separately. The indoor unit 10, the outdoor unit, and the control device 30 are each independently set and installed.

[0051] See also Figure 4 In a second embodiment, the present invention further provides a cooling control method 300 for an air conditioner, comprising steps S31 to S33.

[0052] Step S31, obtain the current indoor ambient temperature T n .

[0053] For example, the current indoor ambient temperature T n The temperature can be 35℃, 30℃, 28℃, etc.

[0054] Step S32: determine the current indoor ambient temperature T n The relationship between the temperature and the preset indoor ambient temperature value T0;

[0055] The preset indoor ambient temperature T0 may be a comfortable temperature felt by the human body, such as 28°C, 29°C, etc. In a specific embodiment of the present invention, the preset indoor ambient temperature T0=29°C.

[0056] Step S33, if T n <T0, the indoor throttle valve 222 controls the refrigerant flow rate flowing into the second indoor heat exchanger group 215 to be smaller than the refrigerant flow rate flowing into the first indoor heat exchanger group 214.

[0057] For example, when the current indoor ambient temperature is detected to be 27°C, since the temperature is already lower than the preset indoor ambient temperature T0, that is, it has reached the lower comfortable temperature required by the human body, there is no need to blow out a colder air flow through the second indoor heat exchanger group 215. The refrigerant flow rate flowing into the second indoor heat exchanger group 215 can be adjusted to a smaller flow rate so that the lower air outlet 12 blows out a higher temperature and soothing air flow. At this time, the upper air outlet 11 can continue to blow out a lower temperature air flow, for example, the air flow temperature of the upper air outlet 11 is lower than the air flow temperature of the lower air outlet 12.

[0058] In addition, when T n When <T0, the cooling method of the air conditioner specifically includes:

[0059] Step 34 : Keep the rotation speed of the first driving fan 13 unchanged, and adjust the rotation speed of the second driving fan 14 to a preset rotation speed R0 .

[0060] Since the user can turn on the first driven fan 13 when the indoor unit 10 of the air conditioner is turned on without making any noise, which is a more comfortable state, there is no need to adjust the speed of the first driven fan 13. In addition, the air outlet corresponding to the first driven fan 13 is the upper air outlet 11, which is located above the air conditioner body 10 and causes less discomfort to the user than the lower air outlet 12 that blows directly toward the user. Therefore, there is no need to adjust the speed of the first driven fan 13. At the same time, since a more gentle air flow is required to be blown out through the lower air outlet 12, it is necessary to adjust the second driven fan 14 to a preset speed R0, so that a gentle air flow is blown out into the lower air outlet 13 at the preset speed R0.

[0061] The preset rotation speed R0 in this embodiment may be in the range of 700-800 r / min.

[0062] After adjusting the rotation speed of the second driving fan 14, the cooling control method of the air conditioner in this embodiment further includes:

[0063] Step 35: Obtain the current operating frequency f of the compressor 211, the current speed R1 of the first driving fan 13, and the current outdoor ambient temperature T 外 , and according to the current speed R1 of the first driving fan 13 and the current outdoor ambient temperature T 外 , calculate the operating frequency f that needs to be adjusted for compressor 221 F ;

[0064] Among them, f F=f*a+b, where a is the percentage of the current operating frequency f that the compressor 211 needs to adjust when the first driving fan 13 is in different speed modes, and the value of a is positively correlated with the current speed R1 of the first driving fan 13. The greater the current speed R1 of the first driving fan 13, the greater the value of a; b is the value of the first driving fan 13 in different speed modes and at different current outdoor ambient temperatures T 外 When the frequency compensation number of the operating frequency of the compressor 211 is adjusted, the magnitude of b is respectively related to the current speed R1 of the first driving fan 13 and the outdoor ambient temperature T 外 The current speed R1 of the first driving fan 13 is greater and the outdoor ambient temperature T 外 The higher it is, the larger the value of b is.

[0065] For example, the first driven fan 13 has different rotational speeds corresponding to the upper air outlet 11, so that the upper air outlet 11 can blow out high-speed wind, medium-speed wind and low-speed wind. For example, when the upper air outlet 11 blows out high-speed wind, the current rotational speed R1 of the first driven fan 13 can be in the range of 1200-1300r / min; when the upper air outlet 11 blows out medium-speed wind, the current rotational speed R1 of the first driven fan 13 can be in the range of 700-800r / min; when the upper air outlet 11 blows out low-speed wind, the current rotational speed R1 of the first driven fan 13 can be in the range of 500-600r / min.

[0066] Therefore, by adjusting the operating frequency f of the compressor 211, it is possible to ensure a comfortable airflow, save energy, and improve the reliability of the refrigeration system operation in the air conditioner.

[0067] Wherein, corresponding to different speed modes of the first driving fan 13, the value of the percentage a may be as follows:

[0068]

[0069] The first driving fan 13 corresponds to different speed modes and different outdoor ambient temperatures T 外 The value of the frequency compensation number b corresponding to the required adjustment of the operating frequency of the compressor 211 can be as follows:

[0070]

[0071] For example, when the current operating frequency f of the compressor 211 is 50 Hz, the first driving fan 13 is in the blowing mode of medium-speed wind, and the outdoor ambient temperature T 外 =30℃, then a=40%, b=19, then the operating frequency of compressor 211 needs to be adjusted to f F=f*a+b=50*40%+19=39Hz.

[0072] After the calculation of the operating frequency of the compressor 211 is completed, the cooling control method of the air conditioner further includes:

[0073] Step 36 : Obtain the current opening degree k of the outdoor throttle valve 212 .

[0074] The outdoor throttle valve 212 controls the refrigerant flow rate on the main flow path.

[0075] Step 37, calculate f F The difference between f and f is used to obtain the compensation coefficient c required for the indoor throttle valve 222 according to the different blowing modes of the first driving fan 21, and the opening value k required for the indoor throttle valve 222 is calculated. F , where k F =k-(ff F )*c, the value of c is positively correlated with the current rotation speed R1 of the first driving fan 13. The greater the current rotation speed R1 of the first driving fan 13, the higher the value of c.

[0076] The values ​​of the compensation coefficient c corresponding to different speed modes of the first driving fan 13 are as follows:

[0077]

[0078] In step S35, the operating frequency f of the compressor 211 that needs to be adjusted is calculated. F =39Hz, for example, when the opening degree k of the outdoor throttle valve 212 is 220 steps, the opening degree k of the indoor throttle valve 222 is F = k-(ff F )*c=220-(50-39)*6=154 steps.

[0079] Therefore, by adjusting the opening k of the indoor throttle valve 222 F A comfortable air flow can be blown out from the downward air outlet 12 .

[0080] In this way, when the indoor ambient temperature T is detected n When <T0, the adjustment of various components in the indoor unit 10 is completed. At this time, the lower air outlet 12 can blow out a soothing airflow through the adjustment of the compressor 211, the indoor throttle valve 222 and the second driving fan 14, which can prevent the airflow with high wind speed and low temperature from blowing directly to the user, achieve the effect of preventing direct blowing, and enhance the user's comfort.

[0081] In addition, when the temperature comparison step is performed, the comparison result is T n> T0, the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215 are fed with the same refrigerant flow. n The temperature is still relatively high, and the indoor unit 10 needs to blow out a lower temperature to achieve the effect of cooling the room. Therefore, the same refrigerant flow is introduced into the first indoor heat exchanger group 214 and the second indoor heat exchanger group 215 at this time, so that the lower air outlet 12 also has the effect of blowing out cold air with a lower temperature, so as to quickly cool the indoor environment through the upper air outlet 11 and the lower air outlet 12.

[0082] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A cooling control method for an air conditioner, characterized in that: include: The air conditioner comprises: an indoor unit, the indoor unit comprising a first driven fan for upward air supply and a second driven fan for downward air supply; A heat exchange system, comprising an indoor heat exchange module, a first refrigerant flow path control module, and a second refrigerant flow path control module, wherein the indoor heat exchange module comprises a first indoor heat exchanger group for upward air supply heat exchange and a second indoor heat exchanger group for downward air supply heat exchange, the first refrigerant flow path control module comprises a plurality of liquid inlet branches and at least one indoor throttle valve, each of the liquid inlet branches being respectively used to transport refrigerant to the first indoor heat exchanger group and the second indoor heat exchanger group, and at least one liquid inlet branch connected to the second indoor heat exchanger group is provided with an indoor throttle valve, and the second refrigerant flow path control module is used to reflux the refrigerant of the first indoor heat exchanger group and the second indoor heat exchanger group; Get the current indoor ambient temperature T n ; Determine the current indoor ambient temperature T n The relationship between the temperature and the preset indoor ambient temperature value T0; If T n <T0, the indoor throttle valve controls the refrigerant flow rate flowing into the second indoor heat exchanger group to be less than the refrigerant flow rate flowing into the first indoor heat exchanger group; if T n <T0, the refrigeration control method of the air conditioner further includes: Keep the speed of the first driving fan unchanged and adjust the speed of the second driving fan to the preset speed R0; After the steps of maintaining the rotational speed of the first driving fan unchanged and adjusting the rotational speed of the second driving fan to a preset rotational speed R0, the cooling control method for the air conditioner further includes: Get the current operating frequency of the compressor, the current speed R1 of the first driving fan and the current outdoor ambient temperature T 外 , and according to the current speed R1 of the first driving fan and the current outdoor ambient temperature T 外 , calculate the operating frequency f that the compressor needs to adjust F ; Among them, f F =f*a+b, where a is the percentage of the compressor to be adjusted relative to the current operating frequency f when the first driving fan is in different speed modes, and the magnitude of a is positively correlated with the current speed R1 of the first driving fan; b is the first driving fan in different speed modes and at different current outdoor ambient temperatures T 外 When the frequency compensation number of the operating frequency of the compressor is adjusted, the magnitude of b is respectively related to the current speed R1 of the first driving fan and the outdoor ambient temperature T 外 There is a positive correlation.

2. The cooling control method of the air conditioner according to claim 1, characterized in that: Calculate the operating frequency f that the compressor needs to adjust F After the step, the refrigeration control method of the air conditioner further includes: Get the current opening k of the outdoor throttle valve; Calculate f F The difference between f and f is used to obtain the compensation coefficient c required for the indoor throttle valve according to the different speed modes of the first driving fan, and the opening value k required to adjust the indoor throttle valve is calculated. F , wherein the value of c is positively correlated with the current speed R1 of the first driving fan; Among them, k F =k-(ff F )*c.

3. The cooling control method of the air conditioner according to claim 1, characterized in that: If T n > T0, the first indoor heat exchanger group and the second indoor heat exchanger group are controlled to have the same refrigerant flow rate.

4. The cooling control method of the air conditioner according to claim 1, characterized in that: The first refrigerant flow path control module further includes a first liquid distributor, and the first liquid distributor indoor heat exchange module forms a plurality of liquid inlet branches.

5. The cooling control method of the air conditioner according to claim 1, characterized in that: The first indoor heat exchanger group and the second indoor heat exchanger group are arranged side by side from top to bottom in the indoor unit, and the number of second indoor heat exchangers in the second indoor heat exchanger group is greater than the number of first indoor heat exchangers in the first indoor heat exchanger group.

6. The cooling control method of the air conditioner according to claim 1, characterized in that: The indoor unit further includes a telescopic structure, which is movably connected relative to the indoor unit to form a movable upper air outlet on the top of the indoor unit.

7. The cooling control method of an air conditioner according to claim 1, wherein: The liquid inlet branch provided with the indoor throttle valve is divided into a plurality of sub-flow paths, and each of the sub-flow paths is connected one by one to the second indoor heat exchanger in the second indoor heat exchanger group.

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