Air conditioner outdoor unit, air conditioner and control method thereof

Abstract

The present invention discloses an air-conditioning outdoor unit, an air-conditioner, and a control method thereof, which relate to the field of air-conditioning and solve the problem in the prior art that air-conditioners can only be connected to a single power supply system, resulting in low versatility of the air-conditioner. The air-conditioning outdoor unit of the present invention includes a heat exchange component, a control component, and a power switching component. The heat exchange component includes a variable frequency compressor and a fixed frequency compressor. The control component includes a first control unit and a second control unit. The first control unit is connected to the fixed frequency compressor, and the second control unit is connected to the variable frequency compressor. The first control unit or the second control unit is also connected to the power switching component, and the power switching component is also connected to the variable frequency compressor or the fixed frequency compressor. The air-conditioning outdoor unit can switch the AC power supply connected to the air-conditioner to a DC power supply, or switch the DC power supply connected to the air-conditioner to an AC power supply through the power switching component, so that the air-conditioner can use the variable frequency compressor and the fixed frequency compressor at the same time, thereby enhancing the versatility of the air-conditioner.

Description

Technical Field

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

[0002] Fixed-frequency compressors use AC power, while variable-frequency compressors use DC power. However, air conditioners currently on the market can only be connected to a single power supply, such as AC or DC, and are incompatible with both. This means that the compressors in existing air conditioners can only be fixed-frequency compressors or variable-frequency compressors, making the air conditioners less versatile. To accommodate both power supply systems, if two air conditioners with different power supply systems are installed, the installation space required for the two independent air conditioners is large, the cost is high, and this wastes resources and is not energy-efficient. Therefore, there is an urgent need to provide an air conditioner with a switchable power supply system. On the other hand, air conditioners currently on the market are powered by the power grid, and large air conditioners consume a lot of electricity, which hinders energy conservation and emission reduction. Therefore, there is an urgent need to find new energy sources to power air conditioners in order to achieve energy conservation and emission reduction. Summary of the Invention

[0003] The present invention aims to provide an air conditioner outdoor unit that solves the technical problem in the prior art that air conditioners can only be connected to a single power supply, resulting in limited versatility due to the air conditioner's compressor being limited to either a fixed-frequency compressor or a variable-frequency compressor. The various technical effects of the preferred technical solution of the present invention are detailed below.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The air-conditioning outdoor unit of the present invention includes a heat exchange component, a control component and a power switching component, wherein the heat exchange component includes a variable frequency compressor and a fixed frequency compressor, the control component includes a first control unit and a second control unit, and the first control unit is connected to the fixed frequency compressor, the second control unit is connected to the variable frequency compressor, the first control unit or the second control unit is also connected to the power switching component, and the power switching component is also connected to the variable frequency compressor or the fixed frequency compressor.

[0006] According to a preferred embodiment, the power switching component is a rectifier module, and the first control unit is connected to the rectifier module, and the rectifier module is also connected to the variable frequency compressor; or the power switching component is an inverter module, and the second control unit is connected to the inverter module, and the inverter module is also connected to the fixed frequency compressor.

[0007] According to a preferred embodiment, the heat exchange component also includes an outdoor heat exchanger, which is connected to the variable frequency compressor and / or the fixed frequency compressor, and a one-way valve is provided at the exhaust port of the fixed frequency compressor, and the flow direction of the refrigerant in the one-way valve is from the fixed frequency compressor to the outdoor heat exchanger.

[0008] According to a preferred embodiment, the heat exchange assembly further includes a variable frequency condensing fan, which is disposed at the outdoor heat exchanger and is connected to the second control unit.

[0009] According to a preferred embodiment, the number of the heat exchange components is one group or at least two groups, and when the number of the heat exchange components is at least two groups, the heat exchange components are symmetrically distributed.

[0010] According to a preferred embodiment, one of the first control unit and the second control unit is installed in a return air area of ​​the air conditioner indoor unit, and the other is installed in a supply air area of ​​the air conditioner indoor unit.

[0011] According to a preferred embodiment, the air-conditioning outdoor unit also includes a photovoltaic power generation component, and the control component also includes a third control unit, the third control unit is connected to the photovoltaic power generation component, and the third control unit is also connected to the second control unit, and / or the photovoltaic power generation component is connected to the power grid.

[0012] According to a preferred embodiment, the third control unit is installed at the variable frequency condensing fan of the heat exchange component.

[0013] The air conditioner outdoor unit provided by the present invention has at least the following beneficial technical effects:

[0014] The air-conditioning outdoor unit of the present invention includes a heat exchange component, a control component and a power switching component. The heat exchange component includes a variable frequency compressor and a fixed frequency compressor. The control component includes a first control unit and a second control unit. The first control unit is connected to the fixed frequency compressor, and the second control unit is connected to the variable frequency compressor. The first control unit or the second control unit is also connected to the power switching component, and the power switching component is also connected to the variable frequency compressor or the fixed frequency compressor. Through the action of the power switching component, the AC power connected to the air conditioner can be switched to a DC power supply, or the DC power connected to the air conditioner can be switched to an AC power supply, so that the air conditioner can use the variable frequency compressor and the fixed frequency compressor at the same time, thereby enhancing the versatility of the air conditioner and solving the technical problem in the prior art that the air conditioner can only be connected to a single power supply standard, so that the compressor of the air conditioner can only be a fixed frequency compressor or a variable frequency compressor, resulting in low versatility of the air conditioner.

[0015] On the other hand, the air-conditioning outdoor unit of the present invention improves the versatility of the air conditioner by switching the power supply mode through a power switching component. Compared with the method of installing two air conditioners with different power supply modes, the present invention also has the advantages of not requiring a large installation space, low cost, and saving resources and energy.

[0016] A second object of the present invention is to provide an air conditioner.

[0017] The air conditioner of the present invention comprises an outdoor unit and an indoor unit, wherein the outdoor unit is connected to the indoor unit, and the outdoor unit is the air conditioner outdoor unit described in any one of the technical solutions of the present invention.

[0018] According to a preferred embodiment, the indoor unit includes an indoor heat exchanger and an air supply fan, wherein the indoor heat exchanger divides the indoor unit into a return air area and a supply air area, the air supply fan is arranged in the supply air area, and the air supply fan is connected to the first control unit of the outdoor unit.

[0019] According to a preferred embodiment, a temperature sensing package is provided at the air outlet of the indoor unit, and the temperature sensing package is used to detect the temperature of the air outlet.

[0020] The air conditioner provided by the present invention has at least the following beneficial technical effects:

[0021] The air conditioner of the present invention has an air conditioner outdoor unit according to any one of the technical solutions of the present invention, so that the air conditioner can use a variable frequency compressor and a fixed frequency compressor at the same time, thereby enhancing the versatility of the air conditioner and solving the technical problem in the prior art that the air conditioner can only be connected to a single power supply system, so that the compressor of the air conditioner can only be a fixed frequency compressor or a variable frequency compressor, resulting in low versatility of the air conditioner.

[0022] On the other hand, the air conditioner of the present invention improves the versatility of the air conditioner by switching the power supply mode through a power switching component. Compared with the method of installing two air conditioners with different power supply modes, the present invention also has the advantages of not requiring a large installation space, low cost, and saving resources and energy.

[0023] A third object of the present invention is to provide a method for controlling an air conditioner.

[0024] The air conditioner control method according to any one of the technical solutions of the present invention comprises the following steps:

[0025] Get the operating mode of the air conditioner;

[0026] Based on the operating mode of the air conditioner, the first control unit controls the start and stop of the fixed-frequency compressor, and the second control unit controls the start and stop of the variable-frequency compressor. The first control unit or the second control unit also controls the working state of the power switching component.

[0027] According to a preferred embodiment, when the air conditioner is in air supply mode, the first control unit controls the air supply fan to turn on, the first control unit controls the fixed frequency compressor to turn off, the second control unit controls the variable frequency compressor to turn off, and the third control unit controls the photovoltaic power generation assembly to turn off;

[0028] When the air conditioner is in AC variable frequency heat exchange mode and the third control unit controls the photovoltaic power generation component to be turned off, the first control unit controls the air supply fan to be turned on, the first control unit controls the power switching component to be turned on, and the second control unit controls the variable frequency compressor and the variable frequency condensing fan to be turned on;

[0029] When the air conditioner is in a DC variable frequency heat exchange mode and the third control unit controls the photovoltaic power generation assembly to be turned on, the third control unit is connected to the second control unit, the second control unit controls the variable frequency compressor and the variable frequency condensing fan to be turned on, and the first control unit controls the air supply fan to be turned on;

[0030] When the air conditioner is in power generation mode, the third control unit controls the photovoltaic power generation component to turn on, the third control unit is connected to the second control unit, the second control unit controls the variable frequency condensing fan with the smallest distance from the photovoltaic power generation component to turn on, the second control unit controls the variable frequency compressor to turn off, and the first control unit controls the fixed frequency compressor and the air supply fan to turn off.

[0031] According to a preferred embodiment, when the air conditioner is in the AC variable frequency heat exchange mode or the DC variable frequency heat exchange mode, the air conditioner further comprises the following steps:

[0032] Get the temperature at the indoor unit outlet;

[0033] comparing the temperature at the air outlet of the indoor unit with a preset air outlet temperature;

[0034] The first control unit controls the on state of the fixed-frequency compressor based on a comparison result between the temperature at the air outlet of the indoor unit and a preset air outlet temperature.

[0035] According to a preferred embodiment, when 3℃≤T1-T0≤5℃, the first control unit controls one of the fixed-frequency compressors to turn on; when 5℃<T1-T0≤8℃, the first control unit controls at least two of the fixed-frequency compressors to turn on; wherein T1 is the temperature at the air outlet of the indoor unit, and T0 is the preset air outlet temperature.

[0036] The air conditioner control method provided by the present invention has at least the following beneficial technical effects:

[0037] The control method of the air conditioner of any technical solution in the present invention obtains the operating mode of the air conditioner, and then based on the operating mode of the air conditioner, the first control unit controls the start and stop of the fixed-frequency compressor, and the second control unit controls the start and stop of the variable-frequency compressor. The first control unit or the second control unit also controls the working state of the power switching component, which can switch the AC power connected to the air conditioner to a DC power supply, or switch the DC power connected to the air conditioner to an AC power supply, so that the air conditioner can use the variable-frequency compressor and the fixed-frequency compressor at the same time, thereby enhancing the versatility of the air conditioner and solving the technical problem in the prior art that the air conditioner can only be connected to a single power supply standard, so that the compressor of the air conditioner can only be a fixed-frequency compressor or a variable-frequency compressor, resulting in low versatility of the air conditioner.

[0038] On the other hand, the control method of the air conditioner of any technical solution in the present invention improves the versatility of the air conditioner by switching the power supply mode. Compared with the method of installing two air conditioners with different power supply modes, the present invention also has the advantage of a simple control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 Schematic diagram of a module of a preferred embodiment of the air conditioner of the present invention;

[0041] Figure 2 1 is a schematic structural diagram of a preferred embodiment of an air conditioner according to the present invention;

[0042] Figure 3 is a circuit topology diagram of a preferred embodiment of the control component of the present invention;

[0043] Figure 4 is a communication diagram of a preferred embodiment of the control component of the present invention;

[0044] Figure 5 It is a flow chart of a preferred embodiment of the air conditioner control method of the present invention.

[0045] In the figure: 10, outdoor unit; 111, variable frequency compressor; 112, fixed frequency compressor; 113, outdoor heat exchanger; 114, one-way valve; 115, variable frequency condensing fan; 121, first control unit; 1211, first AC contactor; 1212, second AC contactor; 1213, third AC contactor; 1214, fourth AC contactor; 1215, AC filter module; 122, second control unit; 1221, DC filter module; 123, third control unit; 1231, DC contactor; 131, rectifier module; 14, photovoltaic power generation component; 20, indoor unit; 21, indoor heat exchanger; 22, air supply fan; 23, temperature sensor. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0047] The following is attached with the instruction manual Figures 1 to 5 And embodiments 1 to 3 describe in detail the air-conditioning outdoor unit, the air conditioner and the control method thereof of the present invention.

[0048] Example 1

[0049] This embodiment describes the air conditioner outdoor unit of the present invention in detail.

[0050] The air conditioner outdoor unit of this embodiment includes a heat exchange component, a control component, and a power switching component. Preferably, the heat exchange component includes a variable frequency compressor 111 and a fixed frequency compressor 112, and the control component includes a first control unit 121 and a second control unit 122, and the first control unit 121 is connected to the fixed frequency compressor 112, and the second control unit 122 is connected to the variable frequency compressor 111, and the first control unit 121 or the second control unit 122 is also connected to the power switching component, and the power switching component is also connected to the variable frequency compressor 111 or the fixed frequency compressor 112. Figures 1 to 3 Preferably, the first control unit 121 is connected to the fixed-frequency compressor 112 via an AC contactor, so that the first control unit 121 can control the start and stop of the fixed-frequency compressor 112 by controlling the conduction state of the AC contactor, as shown in FIG. Figure 3 As shown, the second control unit 122 is connected to the variable frequency compressor 111, so that the start and stop of the variable frequency compressor 111 can be controlled by the second control unit 122. When the air conditioner is in cooling mode, the heat exchange component can also be called a cooling component; when the air conditioner is in heating mode, the heat exchange component can also be called a heating component.

[0051] Preferably, the power switching component is a rectifier module 131, and the first control unit 121 is connected to the rectifier module 131, and the rectifier module 131 is also connected to the variable frequency compressor 111, such as Figure 3 Preferably, the first control unit 121 is connected to the rectifier module 131 via the second AC contactor 1212. The first control unit 121 can control the working state of the rectifier module 131 by controlling the conduction state of the second AC contactor 1212. Figure 3 When the connected power source is AC power, the first control unit 121 controls the rectifier module 131 to operate, thereby switching the AC power source to DC power through the rectifier module 131. The converted DC power is then supplied to the variable frequency compressor 111, thereby enabling the variable frequency compressor 111 to operate. The rectifier module 131 can be a rectifier circuit in the prior art.

[0052] Preferably, the power switching component is an inverter module, and the second control unit 122 is connected to the inverter module, which is also connected to the fixed-frequency compressor 112. When the connected power source is a DC power source, the second control unit 122 controls the inverter module to operate, thereby switching the DC power source to an AC power source through the inverter module. The converted AC power source is then supplied to the fixed-frequency compressor 112, thereby enabling the fixed-frequency compressor 112 to operate. The inverter module can be an inverter circuit known in the art.

[0053] The air conditioner outdoor unit of this embodiment includes a heat exchange component, a control component, and a power switching component. The power switching component can switch the AC power supply connected to the air conditioner to a DC power supply, or vice versa, so that the air conditioner can use both the variable-frequency compressor 111 and the fixed-frequency compressor 112 simultaneously. This enhances the versatility of the air conditioner and solves the technical problem in the prior art that the air conditioner can only be connected to a single power supply system, so that the air conditioner compressor can only be a fixed-frequency compressor 112 or a variable-frequency compressor 111, resulting in low versatility of the air conditioner. On the other hand, the air conditioner outdoor unit of this embodiment improves the versatility of the air conditioner by switching the power supply system through the power switching component. Compared with the method of installing two air conditioners with different power supply systems, this embodiment also has the advantages of not requiring a large installation space, low cost, and saving resources and energy.

[0054] According to a preferred embodiment, the heat exchange assembly further includes an outdoor heat exchanger 113, and the outdoor heat exchanger 113 is connected to the variable frequency compressor 111 and / or the fixed frequency compressor 112. Figure 1 or Figure 2 Preferably, a one-way valve 114 is provided at the exhaust port of the fixed-frequency compressor 112, and the flow direction of the refrigerant in the one-way valve 114 is from the fixed-frequency compressor 112 to the outdoor heat exchanger 113, as shown. Figure 2As shown. In the air-conditioning outdoor unit of the preferred technical solution of this embodiment, a one-way valve 114 is provided at the exhaust port of the fixed-frequency compressor 112. The refrigerant in the one-way valve 114 flows from the fixed-frequency compressor 112 to the outdoor heat exchanger 113, so that when the variable-frequency compressor 111 is in operation and the fixed-frequency compressor 112 is in an off state, the refrigerant discharged from the variable-frequency compressor 111 will not flow back into the fixed-frequency compressor 112, thereby ensuring the reliability of the fixed-frequency compressor 112. On the other hand, when the variable-frequency compressor 111 is in operation and the fixed-frequency compressor 112 is in an off state, the suction port pressure of the variable-frequency compressor 111 is lower than the suction port pressure of the fixed-frequency compressor 112, thereby preventing the refrigerant flowing back from the evaporator from entering the suction port of the fixed-frequency compressor 112, thereby further ensuring the reliability of the fixed-frequency compressor 112.

[0055] According to a preferred embodiment, the heat exchange assembly further includes a variable frequency condensing fan 115, which is disposed at the outdoor heat exchanger 113 and is connected to the second control unit 122. Figures 1 to 3 As shown. The variable frequency condensing fan 115 is a DC variable frequency condensing fan. The variable frequency condensing fan 115 is connected to the second control unit 122, so that the start and stop of the variable frequency condensing fan 115 can be controlled by the second control unit 122. In the air-conditioning outdoor unit of the preferred technical solution of this embodiment, the variable frequency condensing fan 115 is provided at the outdoor heat exchanger 113, which can accelerate the heat exchange effect of the outdoor heat exchanger 113. Preferably, based on the size of the outdoor heat exchanger 113, the number of the variable frequency condensing fan 115 can be one or more, thereby further ensuring the heat exchange effect of the outdoor heat exchanger 113.

[0056] According to a preferred embodiment, the number of heat exchange components is one group or at least two groups, and when the number of heat exchange components is at least two groups, the heat exchange components are symmetrically distributed, such as Figure 1 or Figure 2 Preferably, when the heat exchange demand is large, the number of heat exchange components can be at least two groups, each group of heat exchange components has the same structure, and each group of heat exchange components is independent of each other. Figures 1 to 3 A schematic diagram illustrating two heat exchanger groups is shown. In the preferred technical solution of this embodiment, the air conditioner outdoor unit has one or at least two heat exchanger groups, thereby meeting the varying heat exchange requirements of users. Furthermore, when there are at least two heat exchanger groups, the heat exchanger groups are symmetrically distributed, facilitating component assembly and piping design, avoiding crisscrossing piping paths and facilitating routine maintenance.

[0057] According to a preferred embodiment, one of the first control unit 121 and the second control unit 122 is installed in the return air area of ​​the air conditioner indoor unit, and the other is installed in the supply air area of ​​the air conditioner indoor unit. Preferably, the first control unit 121 is installed in the return air area of ​​the air conditioner indoor unit, and the second control unit 122 is installed in the supply air area of ​​the air conditioner indoor unit. Figure 1 As shown. The first control unit 121 is used to control the fixed-frequency compressor 112. Compared with the second control unit 122 used to control the variable-frequency compressor 111, the first control unit 121 has fewer components and no integrated modules or components that generate significant heat. As a result, the first control unit 121 has low heat dissipation requirements. Installing the first control unit 121 in the return air area of ​​the air conditioner indoor unit can meet the heat dissipation requirements of the first control unit 121. The second control unit 122 contains more integrated modules and components, generating significant heat. If heat is not dissipated in a timely manner, components controlled by the second control unit 122, such as the variable-frequency compressor 111, will not function properly. Therefore, the second control unit 122 has higher heat dissipation requirements. The air-conditioning outdoor unit of the preferred technical solution of this embodiment installs the second control unit 122 in the air supply area of ​​the air-conditioning indoor unit. When the air conditioner is in cooling mode, the air supply area is a cold air area, and the temperature of the air supply area is relatively low (generally around 16°C), which can meet the heat dissipation needs of the second control unit 122; when the air conditioner is in heating mode, the air supply area is a hot air area, and the temperature of the air supply area generally does not exceed 32°C. In addition, with the action of the air supply fan, the heat of the second control unit 122 can also be brought out in a timely and rapid manner, thereby meeting the heat dissipation needs of the second control unit 122.

[0058] According to a preferred embodiment, the air conditioner outdoor unit further includes a photovoltaic power generation component 14, and the control component further includes a third control unit 123, and the third control unit 123 is connected to the photovoltaic power generation component 14, such as Figure 3 As shown. Preferably, the third control unit 123 is also connected to the second control unit 122, and / or the photovoltaic power generation component 14 is connected to the power grid. Preferably, the structure of the photovoltaic power generation component 14 can be the same as the prior art and will not be repeated here. The electric energy generated by the photovoltaic power generation component 14 is direct current. The third control unit 123 is connected to the photovoltaic power generation component 14, so that the start and stop of the photovoltaic power generation component 14 can be controlled by the third control unit 123. The third control unit 123 is also connected to the second control unit 122 through the DC contactor 1231, and / or the photovoltaic power generation component 14 is connected to the power grid, so that the electric energy generated by the photovoltaic power generation component 14 can be converted into alternating current and then transmitted to the power grid, or the electric energy generated by the photovoltaic power generation component 14 can be transmitted to the variable frequency compressor 111 for use. Preferably, the first control unit 121, the second control unit 122 and the third control unit 123 can communicate with each other, such as Figure 4The air conditioner outdoor unit of the preferred technical solution of this embodiment further includes a photovoltaic power generation component 14, so that the air conditioner outdoor unit is compatible with the photovoltaic power generation function and is powered by the electricity generated by the photovoltaic power generation component 14, which can save electricity and achieve the purpose of energy conservation and emission reduction.

[0059] According to a preferred embodiment, the third control unit 123 is installed at the variable frequency condensing fan 115 of the heat exchange component. Figure 1 As shown. Preferably, the third control unit 123 is installed near the outdoor unit housing. In the air-conditioning outdoor unit of the preferred technical solution of this embodiment, the third control unit 123 is installed at the variable frequency condensing fan 115 of the heat exchange component. When the air conditioner is in pure power generation mode, the variable frequency compressor 111, the fixed frequency compressor 112 and the air supply fan 22 are all not working. By turning on the variable frequency condensing fan 115, the heat dissipation of the third control unit 123 can be accelerated to reduce the temperature of the modules and components in the third control unit 123, thereby ensuring the normal operation of the photovoltaic power generation component 14.

[0060] According to a preferred embodiment, the first control unit 121 has an AC filter module 1215, which can filter out the DC component in the AC power supply to ensure the reliability of the fixed-frequency compressor 112 and the air supply fan 22. Figure 3 The second control unit 122 has a DC filter module 1221, which can filter out the AC component in the DC power supply to ensure the reliability of the variable frequency compressor 111 and the variable frequency condensing fan 115. Figure 3 The structures of the AC filter module 1215 and the DC filter module 1221 may be the same as those in the prior art, and will not be described in detail here.

[0061] Example 2

[0062] This embodiment describes the air conditioner of the present invention in detail.

[0063] The air conditioner of this embodiment includes an outdoor unit 10 and an indoor unit 20, which are connected as shown in FIG. Figure 1 or Figure 2 Preferably, the outdoor unit 10 is an air-conditioning outdoor unit of any technical solution in embodiment 1, such as Figure 1 or Figure 2 shown.

[0064] The air conditioner of this embodiment, because it includes an outdoor unit according to any of the technical solutions in Example 1, can simultaneously utilize both a variable-frequency compressor 111 and a fixed-frequency compressor 112, thereby enhancing the versatility of the air conditioner. This solves the technical problem in the prior art where air conditioners can only be connected to a single power supply system, resulting in the air conditioner's compressor being limited to either a fixed-frequency compressor or a variable-frequency compressor, leading to limited versatility. Furthermore, the air conditioner of this embodiment enhances its versatility by enabling switching between power supply systems through a power switching assembly. Compared to installing two air conditioners with different power supply systems, this embodiment also has the advantages of not requiring a large installation space, being low-cost, and conserving resources and energy.

[0065] According to a preferred embodiment, the indoor unit 20 includes an indoor heat exchanger 21 and an air supply fan 22, wherein the indoor heat exchanger 21 divides the indoor unit 20 into a return air area and a supply air area, and the air supply fan 22 is arranged in the supply air area, and the air supply fan 22 is connected to the first control unit 121 of the outdoor unit 10, as shown in FIG. Figures 1 to 3 Preferably, the first control unit 121 is connected to the air supply fan 22 via the first AC contactor 1211. The first control unit 121 can control the working state of the air supply fan 22 by controlling the conduction state of the first AC contactor 1211. Figure 3 As shown in the figure, in the preferred embodiment of the air conditioner, air from the return air area passes through the indoor heat exchanger 21 and reaches the supply air area. After mixing with the air from the supply air area, it is again delivered into the room by the supply air fan 22. The supply air fan 22 is an AC supply air fan. The supply air fan 22 is connected to the first control unit 121 of the outdoor unit 10, so that the first control unit 121 can control the start and stop of the supply air fan 22.

[0066] According to a preferred embodiment, a temperature sensing package 23 is provided at the air outlet of the indoor unit 20, and the temperature sensing package 23 is used to detect the temperature of the air outlet. Figure 2 The air conditioner of the preferred technical solution of this embodiment is provided with a temperature sensing package 23 at the air outlet of the indoor unit 20. The temperature sensing package 23 can detect the temperature at the air outlet. By comparing the actual air outlet temperature at the air outlet with the preset air outlet temperature, it can be determined whether the cooling or heating capacity of the air conditioner is sufficient, so as to determine whether the fixed-frequency compressor 112 needs to be turned on for compensation, so that the air conditioner can meet the user's cooling or heating needs.

[0067] Example 3

[0068] This embodiment describes in detail the control method of the air conditioner of the present invention.

[0069] Figure 5 Flowchart showing a preferred embodiment of the air conditioner control method. Figure 5As shown, the control method of the air conditioner according to any one of the technical solutions in Example 2 includes the following steps:

[0070] Step 1: Acquire the operating mode of the air conditioner. Specifically, the operating mode of the air conditioner can be acquired by acquiring an input instruction from a user.

[0071] Step 2: Based on the operating mode of the air conditioner, the first control unit 121 controls the start and stop of the fixed-frequency compressor 112, and the second control unit 122 controls the start and stop of the variable-frequency compressor 111. The first control unit 121 or the second control unit 122 also controls the working state of the power switching component.

[0072] In the control method for an air conditioner according to any of the technical solutions in Example 2, by obtaining the operating mode of the air conditioner, and then based on the operating mode of the air conditioner, the first control unit 121 controls the start and stop of the fixed-frequency compressor 112, and the second control unit 122 controls the start and stop of the variable-frequency compressor 111. The first control unit 121 or the second control unit 122 also controls the operating state of the power switching component, which can switch the AC power connected to the air conditioner to a DC power supply, or switch the DC power connected to the air conditioner to an AC power supply, thereby allowing the air conditioner to use both the variable-frequency compressor 111 and the fixed-frequency compressor 112 simultaneously, thereby enhancing the versatility of the air conditioner and resolving the technical problem in the prior art that an air conditioner can only be connected to a single power supply system, resulting in the air conditioner's compressor being limited to either a fixed-frequency compressor or a variable-frequency compressor, resulting in low versatility. On the other hand, the control method for an air conditioner according to any of the technical solutions in Example 2 improves the versatility of the air conditioner by switching the power supply system. Compared to the method of installing two air conditioners with different power supply systems, this embodiment also has the advantage of a simpler control method.

[0073] Preferably, when the air conditioner is in air supply mode, the first control unit 121 controls the air supply fan 22 to turn on, the first control unit 121 controls the fixed-frequency compressor 112 to turn off, the second control unit 122 controls the variable-frequency compressor 111 to turn off, and the third control unit 123 controls the photovoltaic power generation assembly 14 to turn off. In other words, when the air conditioner is in air supply mode, the air conditioner does not need to cool or heat, but only needs to supply air. At this time, the first control unit 121 controls the first AC contactor 1211 to conduct, turning on the air supply fan 22, and all other loads are turned off.

[0074] Preferably, when the air conditioner is in AC variable frequency heat exchange mode and the third control unit 123 controls the photovoltaic power generation assembly 14 to be turned off, the first control unit 121 controls the air supply fan 22 to be turned on, the first control unit 121 controls the power switching assembly to be turned on, and the second control unit 122 controls the variable frequency compressor 111 and the variable frequency condensing fan 115 to be turned on. That is, when the air conditioner is in AC variable frequency heat exchange mode and the third control unit 123 controls the photovoltaic power generation assembly 14 to be turned off, the air conditioner needs to operate in cooling or heating mode. For example, when the air conditioner is operating in AC variable frequency cooling mode, the first control unit 121 controls the first AC contactor 1211 to be turned on, turning on the air supply fan 22. The first control unit 121 also controls the second AC contactor 1212 to be turned on, transmitting AC power to the rectifier module 131. After switching by the rectifier module 131, the AC power is converted to DC power and transmitted to the variable frequency compressor 111. The second control unit 122 controls the variable frequency compressor 111 and the variable frequency condensing fan 115 to be turned on. Based on the same principle, a control method for operating the air conditioner in AC variable frequency heating mode can be obtained, which will not be described in detail here.

[0075] Preferably, when the air conditioner is in DC variable frequency heat exchange mode and the third control unit 123 controls the photovoltaic power generation assembly 14 to turn on, the third control unit 123 communicates with the second control unit 122. The second control unit 122 controls the variable frequency compressor 111 and the variable frequency condensing fan 115 to turn on, while the first control unit 121 controls the supply fan 22 to turn on. That is, when the air conditioner is in DC variable frequency heat exchange mode and the third control unit 123 controls the photovoltaic power generation assembly 14 to turn on, the air conditioner needs to operate in cooling or heating mode. For example, when the air conditioner is operating in DC variable frequency cooling mode, the third control unit 123 controls the DC contactor 1231 to turn on, allowing the photovoltaic power generation assembly 14 to supply power to the variable frequency compressor 111 and the variable frequency condensing fan 115. The second control unit 122 controls the variable frequency compressor 111 and the variable frequency condensing fan 115 to turn on. Simultaneously, the first control unit 121 controls the first AC contactor 1211 to turn on, turning on the supply fan 22. Based on the same principle, a control method for an air conditioner operating in DC variable frequency heating mode can be obtained, which will not be further described here.

[0076] Preferably, when the air conditioner is in power generation mode, the third control unit 123 controls the photovoltaic power generation assembly 14 to turn on, the third control unit 123 is connected to the second control unit 122, the second control unit 122 controls the variable frequency condensing fan 115 that is closest to the photovoltaic power generation assembly 14 to turn on, the second control unit 122 controls the variable frequency compressor 111 to turn off, and the first control unit 121 controls the fixed frequency compressor 112 and the air supply fan 22 to turn off. That is, when the air conditioner is in power generation mode, the photovoltaic power generation assembly 14 can transmit AC power to the power grid, while the third control unit 123 controls the DC contactor 1231 to turn on, and the second control unit 122 controls the variable frequency condensing fan 115 that is closest to the third control unit 123 to turn on, so as to dissipate heat from the third control unit 123 and ensure the normal operation of the photovoltaic power generation assembly 14.

[0077] More preferably, when the air conditioner is in the AC variable frequency heat exchange mode or the DC variable frequency heat exchange mode, the following steps are further included:

[0078] Obtain the temperature at the air outlet of the indoor unit 20;

[0079] comparing the temperature at the air outlet of the indoor unit 20 with a preset air outlet temperature;

[0080] Based on a comparison result between the temperature at the air outlet of the indoor unit 20 and a preset air outlet temperature, the first control unit 121 controls the on state of the fixed-frequency compressor 112 .

[0081] Specifically, when 3℃≤T1-T0≤5℃, the first control unit 121 controls one fixed-frequency compressor 112 to turn on; when 5℃<T1-T0≤8℃, the first control unit 121 controls at least two fixed-frequency compressors 112 to turn on; wherein T1 is the temperature at the air outlet of the indoor unit 20, and T0 is the preset air outlet temperature.

[0082] Taking the air conditioner in cooling mode as an example, when 3°C ≤ T1-T0 ≤ 5°C, the air conditioner is judged to be insufficiently cooling and needs to activate one fixed-frequency compressor 112 for compensation. At this time, the first control unit 121 controls the third AC contactor 1213 to conduct, so that the fixed-frequency compressor 112 connected to the third AC contactor 1213 is turned on. When 5°C < T1-T0 ≤ 8°C, the air conditioner is judged to be seriously insufficiently cooling and needs to activate two fixed-frequency compressors 112 for compensation. At this time, the first control unit 121 controls the third AC contactor 1213 and the fourth AC contactor 1214 to conduct, so that the fixed-frequency compressor 112 connected to the third AC contactor 1213 is turned on, and the fixed-frequency compressor 112 connected to the fourth AC contactor 1214 is also turned on, so that the air conditioner meets the user's cooling needs. Based on the same principle, a heating capacity compensation control method for the air conditioner in heating mode can be obtained, which will not be repeated here.

[0083] The control method of the air conditioner of the preferred technical solution of this embodiment is that when the air conditioner operates in heat exchange mode, the variable frequency compressor 111 is turned on first to meet the cooling or heating demand, which has the advantage of energy saving; when the cooling or heating capacity is insufficient, the fixed frequency compressor 112 is turned on to perform cooling or heating compensation, which can not only meet the user's cooling or heating needs, but also has the advantages of low cost and simple control.

[0084] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0085] It should be noted that, in the description of the present invention, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" or "multiple" is at least two.

[0086] It should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In addition, the "connection" used here may include wireless connection; the wording "and / or" used includes any unit and all combinations of one or more associated listed items.

[0087] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0088] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0090] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0091] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0092] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0093] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner comprises an outdoor unit (10) and an indoor unit (20), wherein the outdoor unit (10) and the indoor unit (20) are connected, and the outdoor unit (10) is an air conditioner outdoor unit; The air conditioner outdoor unit comprises a heat exchange component, a control component and a power switching component, wherein the heat exchange component comprises a variable frequency compressor (111) and a fixed frequency compressor (112), the control component comprises a first control unit (121) and a second control unit (122), and The first control unit (121) is connected to the fixed-frequency compressor (112), the second control unit (122) is connected to the variable-frequency compressor (111), the first control unit (121) or the second control unit (122) is further connected to the power switching component, and the power switching component is further connected to the variable-frequency compressor (111) or the fixed-frequency compressor (112); The heat exchange assembly further includes an outdoor heat exchanger (113), the outdoor heat exchanger (113) being connected to the variable frequency compressor (111) and / or the fixed frequency compressor (112), and a one-way valve (114) being provided at the exhaust port of the fixed frequency compressor (112), wherein the flow direction of the refrigerant in the one-way valve (114) is from the fixed frequency compressor (112) to the outdoor heat exchanger (113); The heat exchange assembly further comprises a variable frequency condensing fan (115), the variable frequency condensing fan (115) being arranged at the outdoor heat exchanger (113), and the variable frequency condensing fan (115) being connected to the second control unit (122); It also includes a photovoltaic power generation component (14), and the control component further includes a third control unit (123), the third control unit (123) is connected to the photovoltaic power generation component (14), and The third control unit (123) is also connected to the second control unit (122), and / or the photovoltaic power generation component (14) is connected to the power grid; The control method includes the following steps: Get the operating mode of the air conditioner; Based on the operating mode of the air conditioner, the first control unit (121) controls the start and stop of the fixed-frequency compressor (112), and the second control unit (122) controls the start and stop of the variable-frequency compressor (111), and the first control unit (121) or the second control unit (122) further controls the working state of the power switching component; When the air conditioner is in air supply mode, the first control unit (121) controls the air supply fan (22) to turn on, the first control unit (121) controls the fixed-frequency compressor (112) to turn off, the second control unit (122) controls the variable-frequency compressor (111) to turn off, and the third control unit (123) controls the photovoltaic power generation assembly (14) to turn off; When the air conditioner is in an AC variable frequency heat exchange mode and the third control unit (123) controls the photovoltaic power generation component (14) to be turned off, the first control unit (121) controls the air supply fan (22) to be turned on, the first control unit (121) controls the power switching component to be turned on, and the second control unit (122) controls the variable frequency compressor (111) and the variable frequency condensing fan (115) to be turned on; When the air conditioner is in a DC variable frequency heat exchange mode and the third control unit (123) controls the photovoltaic power generation assembly (14) to be turned on, the third control unit (123) is connected to the second control unit (122), the second control unit (122) controls the variable frequency compressor (111) and the variable frequency condensing fan (115) to be turned on, and the first control unit (121) controls the air supply fan (22) to be turned on; When the air conditioner is in power generation mode, the third control unit (123) controls the photovoltaic power generation assembly (14) to turn on, the third control unit (123) is connected to the second control unit (122), the second control unit (122) controls the variable frequency condensing fan (115) that is the smallest distance from the photovoltaic power generation assembly (14) to turn on, the second control unit (122) controls the variable frequency compressor (111) to turn off, and the first control unit (121) controls the fixed frequency compressor (112) and the air supply fan (22) to turn off.

2. The air conditioner control method according to claim 1, characterized in that: The power switching component is a rectifier module (131), and the first control unit (121) is connected to the rectifier module (131), and the rectifier module (131) is also connected to the variable frequency compressor (111); or The power switching component is an inverter module, and the second control unit (122) is connected to the inverter module, and the inverter module is also connected to the fixed-frequency compressor (112).

3. The air conditioner control method according to claim 1, wherein: The number of the heat exchange components is one group or at least two groups, and when the number of the heat exchange components is at least two groups, the heat exchange components are symmetrically distributed.

4. The air conditioner control method according to claim 1, wherein: One of the first control unit (121) and the second control unit (122) is installed in the return air area of ​​the air conditioner indoor unit, and the other is installed in the supply air area of ​​the air conditioner indoor unit.

5. The air conditioner control method according to any one of claims 1 to 3, characterized in that: The third control unit (123) is installed at the variable frequency condensing fan (115) of the heat exchange component.

6. The air conditioner control method according to any one of claims 1 to 4, characterized in that: The indoor unit (20) includes an indoor heat exchanger (21) and an air supply fan (22), wherein the indoor heat exchanger (21) divides the indoor unit (20) into a return air area and an air supply area, the air supply fan (22) is arranged in the air supply area, and the air supply fan (22) is connected to the first control unit (121) of the outdoor unit (10).

7. The air conditioner control method according to claim 6, characterized in that: A temperature sensing package (23) is provided at the air outlet of the indoor unit (20), and the temperature sensing package (23) is used to detect the temperature of the air outlet.

8. The air conditioner control method according to any one of claims 1 to 4, characterized in that: When the air conditioner is in the AC variable frequency heat exchange mode or the DC variable frequency heat exchange mode, the following steps are further included: Obtaining the temperature at the air outlet of the indoor unit (20); comparing the temperature at the air outlet of the indoor unit (20) with a preset air outlet temperature; Based on a comparison result between the temperature at the air outlet of the indoor unit (20) and a preset air outlet temperature, the first control unit (121) controls the on state of the fixed-frequency compressor (112).

9. The air conditioner control method according to claim 8, characterized in that: When 3°C≤T1-T0≤5°C, the first control unit (121) controls one of the fixed-frequency compressors (112) to start; When 5°C < T1 - T0 ≤ 8°C, the first control unit (121) controls at least two of the fixed-frequency compressors (112) to start; Wherein, T1 is the temperature at the air outlet of the indoor unit (20), and T0 is the preset air outlet temperature.

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