Air conditioner and control method thereof

Abstract

The application relates to an air conditioner and a control method thereof, and belongs to the technical field of air conditioners. The air conditioner comprises a condenser, an electronic expansion valve, an evaporator, a water conveying device and a water storage device. The electronic expansion valve has a plurality of opening degrees. The water conveying device is configured to convey condensed water generated by the evaporator to the water storage device. A refrigerant pipeline of the condenser comprises a water-wetted pipe section in the water storage device. The control method comprises the following steps: obtaining a working state of the water conveying device, obtaining a first temperature by obtaining a temperature of the water-wetted pipe section, and / or obtaining a second temperature by obtaining a temperature of water in the water storage device; and controlling the opening degree of the electronic expansion valve according to the working state of the water conveying device and the first temperature and / or the second temperature. The control method of the air conditioner provided by the application can change the air conditioner system pressure without increasing the total current of the system, so that the frequency reduction operation of the air conditioner is reduced or avoided, and the temperature adjustment demand of a user is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, in particular to an air conditioner and a control method thereof. BACKGROUND

[0002] The evaporator and the condenser of the saddle type air conditioner window unit are respectively across the two sides of the window or wall, and the evaporator is usually lower than the condenser. In order to reduce the air conditioning system pressure, the prior art proposes a technical solution of setting a water pan under the evaporator, and conveying the condensate water contained in the water pan to a water storage device by a water pump, and using the residual heat of the condensate water to cool the high-temperature refrigerant. The technical solution improves the heat dissipation efficiency of the refrigerant, thereby improving the energy efficiency of the air conditioner, and helps to reduce the air conditioning system pressure. However, when the condensate water in the water pan is insufficient, the water pump will stop running, and the air conditioning system pressure will continue to increase until the limit system pressure. In order to avoid current overload causing equipment damage, the air conditioner can only run at a reduced frequency, which cannot meet the user's temperature adjustment demand. SUMMARY

[0003] In view of the above problems, the present application proposes an air conditioner and a control method thereof which at least partially solve the above problems, aiming to solve the problem that the air conditioner in the prior art cannot meet the user's temperature adjustment demand, to realize reducing or avoiding the air conditioner running at a reduced frequency, to meet the user's temperature adjustment demand, and to achieve the effect of improving user experience.

[0004] Specifically, the present application provides the following technical solutions:

[0005] A control method of an air conditioner, the air conditioner comprising a condenser, an electronic expansion valve, an evaporator, a water conveying device and a water storage device. The electronic expansion valve has a plurality of opening degrees. The water conveying device is configured to convey condensate water generated by the evaporator to the water storage device. The refrigerant pipeline of the condenser comprises a water-soaked pipe section in the water storage device.

[0006] The control method comprises:

[0007] obtaining the working state of the water conveying device, and

[0008] obtaining the temperature of the water-soaked pipe section to obtain a first temperature, and / or obtaining the temperature of the water in the water storage device to obtain a second temperature;

[0009] controlling the opening degree of the electronic expansion valve according to the working state of the water conveying device, and the first temperature and / or the second temperature.

[0010] Optionally, the working state comprises a water conveying state and a non-water conveying state.

[0011] The control of the opening degree of the electronic expansion valve according to the working state of the water delivery device and the first temperature and / or the second temperature comprises:

[0012] The control of the opening degree of the electronic expansion valve according to the working state of the water delivery device and the first temperature and / or the second temperature comprises:

[0013] Optionally, the control of the opening degree of the electronic expansion valve according to the first temperature and / or the second temperature comprises:

[0014] In response to the first temperature being greater than or equal to a first preset temperature, the opening degree of the electronic expansion valve is controlled to be increased.

[0015] Optionally, the control of the opening degree of the electronic expansion valve according to the first temperature and / or the second temperature comprises:

[0016] In response to the first temperature being greater than or equal to the first preset temperature and less than a second preset temperature, the second preset temperature being greater than the first preset temperature, the opening degree of the electronic expansion valve is controlled to be a first opening degree.

[0017] In response to the first temperature being greater than or equal to the second preset temperature, the opening degree of the electronic expansion valve is controlled to be a second opening degree, the second opening degree being greater than the first opening degree.

[0018] Optionally, after the opening degree of the electronic expansion valve is controlled to be the second opening degree, the control method further comprises:

[0019] In response to the first temperature being greater than or equal to a third preset temperature, the compressor of the air conditioner is controlled to operate at a reduced frequency; the third preset temperature being greater than the second preset temperature.

[0020] Optionally, the control method further comprises:

[0021] In response to the first temperature being greater than or equal to a third preset temperature, the opening degree of the electronic expansion valve is controlled to be a maximum opening degree, and the compressor of the air conditioner is controlled to operate at a reduced frequency; the third preset temperature being greater than the first preset temperature.

[0022] Optionally, the control of the opening degree of the electronic expansion valve according to the first temperature and / or the second temperature comprises:

[0023] In response to the first temperature being less than a first preset temperature, the current opening degree of the electronic expansion valve is maintained.

[0024] Optionally, the first opening degree is greater than the opening degree of the electronic expansion valve when the water delivery device is in a water delivery state or when the first temperature is less than the first preset temperature.

[0025] Optionally, the water delivery device comprises a water pump; the condensed water is delivered to the water storage device under the action of the water pump; when the water pump stops running, the working state is the non-water delivery state; and

[0026] The water delivery device comprises a water delivery pipe and a valve arranged in the water delivery pipe; the condensed water is delivered to the water storage device under gravity; when the valve is closed, the working state is the non-water delivery state.

[0027] Optionally, the water delivery device comprises a water pump; the condensed water is delivered to the water storage device under the action of the water pump; when the water pump stops running, the working state is the non-water delivery state.

[0028] Optionally, the water delivery device comprises a water delivery pipe and a valve arranged in the water delivery pipe; the condensed water is delivered to the water storage device under gravity; when the valve is closed, the working state is the non-water delivery state.

[0029] Optionally, the bottom of the condenser is in the water storage device, and the refrigerant pipeline of the bottom of the condenser is a water-soaked pipe section; and

[0030] The condenser comprises a main body and the water-soaked pipe section connected to the main body.

[0031] Optionally, the bottom of the condenser is in the water storage device, and the refrigerant pipeline of the bottom of the condenser is a water-soaked pipe section.

[0032] Optionally, the condenser comprises a main body and the water-soaked pipe section connected to the main body.

[0033] Optionally, the air conditioner further comprises a temperature sensor. The temperature sensor is arranged in the water storage device and at the bottom of the water storage device.

[0034] In another aspect, the present application also provides an air conditioner, which comprises a condenser, an electronic expansion valve, an evaporator, a water delivery device, and a water storage device. The electronic expansion valve has a plurality of opening degrees. The water delivery device is configured to deliver condensed water generated by the evaporator to the water storage device. The refrigerant pipeline of the condenser comprises a water-soaked pipe section in the water storage device.

[0035] The air conditioner further comprises a processor and a machine executable program stored on the memory and running on the processor, and the processor implements the control method of the air conditioner described above when executing the machine executable program.

[0036] The application provides a control method of an air conditioner. The air conditioner is provided with a condenser, an electronic expansion valve, an evaporator, a water delivery device and a water storage device. The air conditioner can acquire and control the opening degree of the electronic expansion valve according to the working state of the water delivery device and the temperature of the bubble water pipe section and / or the temperature of the water in the water storage device. The water delivery device has at least two working states of water delivery state and non-water delivery state, and the system pressure can be changed by changing the working state. The electronic expansion valve has several opening degrees, and the refrigeration and heating capacity of the air conditioner can be changed without increasing the overall power of the system or the total current of the system, so as to change the system pressure. The control method of the air conditioner provided by the application combines the above two methods of changing the system pressure of the air conditioner, so as to change the system pressure without increasing the total current of the system, reduce or avoid the frequency reduction operation of the air conditioner, meet the temperature adjustment demand of the user, and improve the user experience.

[0037] The above and other objects, advantages and features of the application will become more apparent from the following detailed description of some embodiments thereof, when considered with the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] Some specific embodiments of the application will be described in detail below with reference to the attached drawings. The same reference numerals in the drawings denote the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0039] Figure 1 is a schematic flow chart of a control method of an air conditioner according to an embodiment of the application;

[0040] Figure 2 is a schematic flow chart of a control method of an air conditioner according to another embodiment of the application;

[0041] Figure 3 is a schematic flow chart of a control method of an air conditioner according to still another embodiment of the application;

[0042] Figure 4 is a schematic flow chart of a control method of an air conditioner according to yet another embodiment of the application;

[0043] Figure 5 is a schematic structural diagram of an air conditioner according to an embodiment of the application, in which the compressor is not shown;

[0044] Figure 6 is a schematic structural diagram of an air conditioner according to another embodiment of the application, in which the compressor is not shown. DETAILED DESCRIPTION

[0045] Reference will now be made to Figures 1 to 6This invention describes an air conditioner and its control method according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0046] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0049] Figure 1 This is a schematic flowchart of an air conditioner control method according to an embodiment of the present invention, and in conjunction with...Figures 2-6 The application provides a control method of an air conditioner, which comprises a condenser 1, an electronic expansion valve 2, an evaporator 3, a water conveying device and a water storage device 4. The electronic expansion valve 2 has several opening degrees. The water conveying device is configured to convey the condensed water generated by the evaporator 3 to the water storage device 4. The refrigerant pipeline of the condenser 1 comprises a water-wetted pipe section 5 in the water storage device 4.

[0050] The control method comprises the following steps:

[0051] S11: obtaining the working state of the water conveying device; obtaining the temperature of the water-wetted pipe section 5 to obtain a first temperature, and obtaining the temperature of the water in the water storage device 4 to obtain a second temperature;

[0052] S12: controlling the opening degree of the electronic expansion valve 2 according to the working state of the water conveying device and the first temperature and the second temperature.

[0053] In the embodiment, the air conditioner is provided with the condenser 1, the electronic expansion valve 2, the evaporator 3, the water conveying device and the water storage device 4. A water receiving tray can be arranged below the evaporator 3, and the water receiving tray can have a certain volume to receive the low-temperature condensed water generated by the evaporator 3. The water conveying device can have a water pipe, through which the condensed water in the water receiving tray is conveyed into the water storage device 4. When the water receiving tray is higher than the water storage device 4, the condensed water can flow into the water storage device 4 under the action of gravity; when the water receiving tray is lower than the water storage device 4, the water conveying device needs to be provided with a water pumping device to pump the condensed water in the water receiving tray into the water storage device 4. Of course, the water conveying device can first convey the condensed water in the water receiving tray to the upper side or the side of the condenser 1, spray it onto the condenser 1, and then flow into the water storage device 4. The water-wetted pipe section 5 can be part of the refrigerant pipeline, and the material of the water-wetted pipe section 5 is a material with a high thermal conductivity, such as aluminum material, copper material, etc., and can prevent rust. The water-wetted pipe section 5 can be upstream of the main body of the refrigerant pipeline of the condenser 1, or downstream of the main body of the refrigerant pipeline of the condenser 1, or both upstream and downstream of the main body of the refrigerant pipeline of the condenser 1, so as to increase the contact area of the water-wetted pipe section 5 with the refrigerant and the condensed water and improve the heat exchange efficiency.

[0054] In the application, when the condensed water in the water pipe flows to the water storage device 4, the working state of the water conveying device can be defined as a water conveying state; when the condensed water in the water pipe does not flow to the water storage device 4, the working state of the water conveying device can be defined as a non-water conveying state. When in the water conveying state, the residual heat of the condensed water can cool the high-temperature refrigerant in the condenser 1, thereby improving the heat dissipation efficiency of the refrigerant and the energy efficiency of the air conditioner, and helping to reduce the pressure of the air conditioning system.

[0055] The electronic expansion valve 2 can be arranged downstream of the condenser 1 and upstream of the evaporator 3. The air conditioner can be provided with a separate throttling device upstream of the evaporator 3, the throttling device being in series with the electronic expansion valve 2, and the flow of refrigerant entering the evaporator 3 being controlled by the opening degree of the electronic expansion valve 2. The air conditioner can also not be provided with a separate throttling device, and the throttling function can be borne by the electronic expansion valve 2. Since the electronic expansion valve 2 can adjust the flow of refrigerant entering the evaporator 3, that is, the refrigerating or heating capacity of the air conditioner can be changed without changing the power or frequency of the compressor of the air conditioner, and thus the pressure of the air conditioning system can be adjusted.

[0056] In this embodiment, after the first temperature and the second temperature are obtained, the values thereof can be processed, for example, averaged, to accurately reflect the temperature of the environment in which the condenser 1 is located by comprehensively considering the first temperature and the second temperature. The values can also not be processed, and the first temperature and the second temperature can be directly used as parameters to control the opening degree of the electronic expansion valve 2 in combination with the working state of the water delivery device.

[0057] The control method of the air conditioner provided by the present application organically combines the two methods of changing the pressure of the air conditioning system, and can change the pressure of the air conditioning system without increasing the total current of the system, thereby reducing or avoiding the frequency reduction operation of the air conditioner, meeting the temperature adjustment needs of the user, and achieving the effect of improving the user experience.

[0058] The control method of the air conditioner provided by the present application is suitable for various air conditioners including but not limited to a saddle type air conditioner window machine, as long as the air conditioner is provided with an electronic expansion valve 2, a condenser water collecting tray and a water delivery device, and the opening degree of the electronic expansion valve 2 can be controlled according to the water delivery device and the first temperature and the second temperature regardless of the relative height of the evaporator 3 and the condenser 1, so as to adjust the pressure of the air conditioning system.

[0059] In some embodiments of the control method of the present application, the working state includes a water delivery state and a non-water delivery state. Controlling the opening degree of the electronic expansion valve 2 according to the working state of the water delivery device and the first temperature and the second temperature includes:

[0060] S123, in response to the working state being the non-water delivery state, controlling the opening degree of the electronic expansion valve 2 according to the first temperature and the second temperature.

[0061] In this embodiment, when the working state of the water delivery device is the non-water delivery state, the air conditioner will not be able to accelerate the heat dissipation of the condenser 1 by using the cold energy of the condenser water, and the air conditioner can be in or about to be in a system limit pressure state. At this time, in order to reduce the overload of the air conditioner and meet the temperature adjustment needs of the user, the opening degree of the electronic expansion valve 2 is controlled to be increased.

[0062] Generally, the temperature adjustment capacity of the air conditioner is set with a certain redundancy, specifically, the maximum value of the refrigerant flow of the air conditioner is slightly larger than the refrigerant flow corresponding to the rated worst working condition of the air conditioner, or the specification of the electronic expansion valve 2 or the throttling device is set to be slightly larger than the specification corresponding to the rated worst working condition of the air conditioner, so as to meet the temperature adjustment demand of the user under extreme conditions. When the opening degree of the electronic expansion valve 2 is the maximum opening degree, the redundant temperature adjustment capacity of the air conditioner is fully utilized, the flow of the refrigerant entering the evaporator 3 is increased as much as possible, the temperature adjustment capacity of the air conditioner is improved as much as possible without increasing the total current of the air conditioner, so as to reduce the system pressure of the air conditioner and avoid or delay the overload operation of the air conditioner.

[0063] In some embodiments of the control method of the application, as shown in Figure 2 The control method comprises the following steps:

[0064] S21, acquiring the working state of the water delivery device; acquiring the temperature of the bubble water pipe section 5 to obtain a first temperature;

[0065] S22, controlling the opening degree of the electronic expansion valve 2 according to the working state of the water delivery device and the first temperature.

[0066] In this embodiment, since the first temperature of the bubble water pipe section 5 can accurately reflect the temperature of the environment in which the condenser 1 is located, the opening degree of the electronic expansion valve 2 can be determined by only using the working state of the water delivery device and the first temperature as input parameters.

[0067] The control method of the air conditioner provided by the application is suitable for various air conditioners including but not limited to saddle type air conditioner window machines, as long as the air conditioner is provided with an electronic expansion valve 2, a condenser water receiving tray and a water delivery device, regardless of the relative height of the evaporator 3 and the condenser 1, the opening degree of the electronic expansion valve 2 can be controlled according to the water delivery device and the first temperature, so as to adjust the system pressure of the air conditioner.

[0068] In some embodiments of the control method of the application, the control of the opening degree of the electronic expansion valve 2 according to the first temperature comprises:

[0069] S221, in response to the first temperature being greater than or equal to a first preset temperature, increasing the opening degree of the electronic expansion valve 2.

[0070] In the embodiment, when the water delivery device is in the non-water delivery state, the air conditioner cannot accelerate the heat dissipation of the condenser 1 by using the cold energy of the condensed water, and the air conditioner can be in or about to be in the system limit pressure state. However, the air conditioner can be in the just-ended water delivery state, or the condenser 1 is in a low-temperature environment, and at this time, the air conditioner can be in the normal system pressure state. To further determine the current state of the air conditioner, the control method of the embodiment takes the step of obtaining the first temperature of the condensed water in the water storage device 4, which can represent the ambient temperature of the condenser 1.

[0071] In the embodiment, the first preset temperature can be obtained by theoretical calculation, or can be obtained by experiment or actual use, and the first preset temperature of air conditioners of different specifications is different. When the first temperature is less than the first preset temperature, the air conditioner can be in the just-ended water delivery state, the temperature of the condensed water in the water storage device 4 is low, or the outdoor environment temperature is low. At this time, the heat dissipation capacity of the condenser 1 is large, and the system pressure of the air conditioner is small, so the air conditioner can continue to operate normally.

[0072] When the first temperature is greater than or equal to the first preset temperature, the temperature of the bubble tube section 5 in the water storage device 4 is slightly high, or the outdoor environment temperature is slightly high. At this time, the heat dissipation capacity of the condenser 1 is slightly low, and the system pressure of the air conditioner is slightly high, so the opening of the electronic expansion valve 2 needs to be increased to the first opening, which is greater than the current opening. By increasing the flow of refrigerant entering the evaporator 3, the air conditioner temperature adjustment capacity is improved without increasing the total current of the air conditioner, thereby reducing the system pressure of the air conditioner and avoiding overload operation of the air conditioner.

[0073] In some embodiments of the control method of the application, as shown in Figure 3 In response to the first temperature being greater than or equal to the first preset temperature, the control method of the air conditioner further includes:

[0074] S222, in response to the first temperature being greater than or equal to the first preset temperature and less than the second preset temperature, the second preset temperature being greater than the first preset temperature, controlling the electronic expansion valve 2 to have the first opening;

[0075] S223, in response to the first temperature being greater than or equal to the second preset temperature, controlling the electronic expansion valve 2 to have the second opening, the second opening being greater than the first opening.

[0076] In the embodiment, to further accurately control the opening degree of the electronic expansion valve 2 of the air conditioner and to reduce the air conditioning system pressure as much as possible, a second preset temperature is further set, which is higher than the first preset temperature. The second preset temperature can be obtained according to theoretical calculation, or can be obtained through experiments or actual use, and the second preset temperature of air conditioners of different specifications is different. When the first temperature is greater than or equal to the second preset temperature, the temperature of the bubble tube section 5 in the water storage device 4 is relatively high, or the outdoor environment temperature is relatively high. At this time, the heat dissipation capacity of the condenser 1 is relatively low, and the air conditioning system pressure is relatively high. Therefore, it is necessary to increase the opening degree of the electronic expansion valve 2 to the second opening degree, which can be the maximum opening degree of the electronic expansion valve 2 or slightly less than the maximum opening degree. When the opening degree of the electronic expansion valve 2 is the second opening degree, the redundant temperature adjustment capacity of the air conditioner can be fully utilized, the flow of the refrigerant entering the evaporator 3 is increased as much as possible, the air conditioning temperature adjustment capacity is improved as much as possible without increasing the total current of the air conditioner, so as to reduce the air conditioning system pressure and avoid or delay the overload operation of the air conditioner.

[0077] It should be noted that in the control method of the embodiment, the first preset temperature, the second preset temperature, the first opening degree and the second opening degree are artificially set, that is, the preset temperature and the opening degree of the electronic expansion valve 2 are discrete values. In actual use, the preset temperature and the opening degree of the electronic expansion valve 2 can be continuous values, that is, the preset temperature value and the opening degree value of the electronic expansion valve 2 can be mapped to an approximately continuous function. In this way, the opening degree of the electronic expansion valve 2 can be further accurately controlled according to the first temperature.

[0078] In some embodiments of the control method of the application, after the opening degree of the electronic expansion valve 2 is controlled to the second opening degree, the control method further includes:

[0079] S224, in response to the first temperature being greater than or equal to a third preset temperature, controlling the compressor of the air conditioner to operate at a reduced frequency; the third preset temperature is greater than the second preset temperature.

[0080] In the embodiment, to further accurately control the opening degree of the electronic expansion valve 2 of the air conditioner and to reduce the air conditioning system pressure as much as possible, a third preset temperature is further set, which is higher than the second preset temperature. The third preset temperature can be obtained according to theoretical calculation, or can be obtained through experiments or actual use, and the third preset temperature of air conditioners of different specifications is different. When the first temperature is greater than or equal to the third preset temperature, the temperature of the bubble tube section 5 in the water storage device 4 is extremely high, or the outdoor environment temperature is extremely high. At this time, the heat dissipation capacity of the condenser 1 is extremely low, and the air conditioning system pressure is extremely high. At this time, limited by the equipment, even if the opening degree of the electronic expansion valve 2 is increased to the maximum opening degree, the temperature adjustment demand of the user cannot be met. To avoid the air conditioner running at an extremely high pressure for a long time and thus causing overload operation, while the opening degree of the electronic expansion valve 2 is maintained at the second opening degree, the compressor is controlled to operate at a reduced frequency.

[0081] In some embodiments of the control method of the present application, the control method further comprises:

[0082] S31, in response to the first temperature being greater than or equal to the third preset temperature, controlling the electronic expansion valve 2 to be at maximum opening, and controlling the compressor of the air conditioner to operate at a reduced frequency.

[0083] In this embodiment, if the first temperature is detected to be greater than or equal to the third preset temperature, it indicates that the temperature of the bubble tube section 5 in the water storage device 4 is extremely high, or the outdoor ambient temperature is extremely high. At this time, the heat dissipation capacity of the condenser 1 is extremely low, and the pressure of the air conditioning system is extremely high. Limited by the equipment, even if the opening of the electronic expansion valve 2 is adjusted to be at maximum opening, it still cannot meet the user's temperature adjustment demand. To avoid the air conditioner running at an extreme pressure for a long time and thus causing overload operation, the electronic expansion valve 2 is directly adjusted to be at maximum opening, and the compressor is controlled to operate at a reduced frequency.

[0084] In some embodiments of the control method of the present application, the control method further comprises:

[0085] S225, in response to the first temperature being less than the first preset temperature, maintaining the current opening of the electronic expansion valve 2.

[0086] In this embodiment, when the first temperature is less than the first preset temperature, the air conditioner can have just ended the water delivery state, and the temperature of the condensed water in the water storage device 4 is still low, or the outdoor ambient temperature is relatively low. At this time, the heat dissipation capacity of the condenser 1 is relatively large, and the pressure of the air conditioning system is relatively small. Therefore, the air conditioner can be directly returned to normal operation, and the current opening of the electronic expansion valve 2 is maintained unchanged.

[0087] In some embodiments of the control method of the present application, the water delivery device comprises a water pump; and when the water pump stops operating, the working state is the non-water delivery state. In this embodiment, regardless of the relative height of the evaporator 3 and the condenser 1, or regardless of the relative height of the positions of the inlet and the outlet of the water delivery device, the condensed water can be delivered from the evaporator 3 to the water storage device 4 by the water pump. The water delivery device has strong applicability and is suitable for various air conditioners, especially for saddle type air conditioner window units.

[0088] In some embodiments of the control method of the present application, the water delivery device comprises a water delivery pipe and a valve arranged in the water delivery pipe; and the condensed water is delivered to the water storage device 4 under the action of gravity; and when the valve is closed, the working state is the non-water delivery state. In this embodiment, the height of the evaporator 3 relative to the condenser 1 is relatively high, or the height of the position of the inlet of the water delivery device relative to the outlet is relatively high. The condensed water does not need power and can flow into the water storage device 4 under the action of gravity or water pressure. The valve can control the on-off of the condensed water flow.

[0089] It should be noted that even if the water delivery device is provided with a water pump, a valve can be arranged in the water delivery pipe to further control the on-off and flow rate of the condensed water.

[0090] In some embodiments of the control method of the present application, the air conditioner further comprises a temperature sensor 6. The temperature sensor 6 is used to detect the first temperature. The temperature sensor 6 is arranged in the water storage device 4 and at the bottom of the water storage device 4, and the second temperature is represented by measuring the temperature of the condensed water in the water storage device 4.

[0091] In some embodiments of the control method of the present application, the temperature sensor 6 is arranged on the water bubbling pipe section 5, and the first temperature is represented by measuring the temperature of the water bubbling pipe section 5.

[0092] In some embodiments of the control method of the present application, the temperature sensor 6 is arranged at the bottom of the condenser 1, and the first temperature is represented by measuring the temperature at the bottom of the condenser 1.

[0093] In some embodiments of the control method of the present application, the bottom of the condenser 1 is in the water storage device 4, and the refrigerant pipeline at the bottom of the condenser 1 is the water bubbling pipe section 5. In this embodiment, the water bubbling pipe section 5 can be provided with heat dissipation fins to contact the condensed water in the water storage device 4.

[0094] In some embodiments of the control method of the present application, the condenser 1 comprises a main body and a water bubbling pipe section 5 connected to the main body. In this embodiment, the water bubbling pipe section 5 can not be provided with heat dissipation fins, and directly contacts the condensed water in the water storage device 4.

[0095] In some embodiments of the control method of the present application, the first opening degree is greater than the opening degree of the electronic expansion valve 2 when the water delivery device is in the water delivery state, or when the first temperature is less than the first preset temperature. That is, the first opening degree is greater than the opening degree in the normal working state of the air conditioner.

[0096] In some embodiments of the control method of the present application, as shown in Figure 4 the control method comprises:

[0097] S51 the air conditioner is normally operated;

[0098] S52 the working state of the water delivery device is obtained;

[0099] S53 it is judged whether the working state of the water delivery device is the non-water delivery state;

[0100] S54 if not, return to the normal operation of the air conditioner; if yes, obtain the first temperature;

[0101] S55 it is judged whether the first temperature is less than the first preset temperature;

[0102] S56If yes, return to normal operation of the air conditioner; if no, determine whether the first temperature is greater than or equal to the first preset temperature and less than the second preset temperature;

[0103] S61If yes, control the electronic expansion valve 2 to the first opening degree, and return to obtaining the working state of the water delivery device;

[0104] S57If no, determine whether the first temperature is greater than or equal to the second preset temperature and less than the third preset temperature;

[0105] S62If no, control the electronic expansion valve 2 to the second opening degree, and return to obtaining the working state of the water delivery device;

[0106] S58If yes, determine whether the first temperature is greater than or equal to the third preset temperature;

[0107] S59If no, return to obtaining the working state of the water delivery device; if yes, the compressor operates at a reduced frequency.

[0108] In this embodiment, when the air conditioner is normally operating or is turned on, the working state of the water delivery device is obtained. Of course, the air conditioner can also be set to obtain the working state of the water delivery device at a predetermined time interval, for example, 1 minute. If the working state of the water delivery device is not the non-water delivery state, that is, the water delivery device is delivering condensate water to the water storage device 4, at this time, the refrigerant heat dissipation efficiency is relatively high, and the air conditioning system pressure is relatively low or not at the limit pressure, and the air conditioner can maintain normal operation logic. If the working state of the water delivery device is the non-water delivery state, at this time, the air conditioning system pressure can be relatively high or at the limit pressure, in order to relieve the system pressure, the opening degree of the electronic expansion valve 2 needs to be controlled to improve the refrigerating and heating capacity of the air conditioner, otherwise the air conditioner can be operated at a reduced frequency due to total current overload, and the temperature adjustment demand of the user cannot be met.

[0109] In this embodiment, in order to determine the opening degree of the electronic expansion valve 2, the first temperature is obtained next, which represents the ambient temperature near the condenser 1 and will directly affect the heat dissipation capacity of the condenser 1 and the air conditioning system pressure. Therefore, a set of control logic with a corresponding relationship is established between the opening degree of the electronic expansion valve 2 and the first temperature. The first temperature is set to four intervals from small to large, less than the first preset temperature as the first interval, between the first preset temperature and the second preset temperature as the second interval, between the second preset temperature and the third preset temperature as the third interval, and greater than or equal to the third preset temperature as the fourth interval.

[0110] When the first temperature is in the first interval, the air conditioner can just end the water delivery state, the condensate water temperature in the water storage device 4 is still low, or the outdoor ambient temperature is relatively low. At this time, the heat dissipation capacity of the condenser 1 is relatively large, and the air conditioning system pressure is relatively small, so the air conditioner can directly return to normal operation, and the current opening degree of the electronic expansion valve 2 is maintained unchanged.

[0111] When the first temperature is in the second interval, the condensate water temperature in the water storage device 4 is slightly high, or the outdoor environment temperature is slightly high. At this time, the heat dissipation capacity of the condenser 1 is slightly low, and the air conditioning system pressure is slightly high. Therefore, the opening degree of the electronic expansion valve 2 needs to be adjusted to the first opening degree. By increasing the flow of refrigerant entering the evaporator 3, the air conditioning temperature adjustment capacity is improved without increasing the total current of the air conditioner, thereby reducing the air conditioning system pressure and avoiding overload operation of the air conditioner.

[0112] When the first temperature is in the third interval, the condensate water temperature in the water storage device 4 is high, or the outdoor environment temperature is high. At this time, the heat dissipation capacity of the condenser 1 is low, and the air conditioning system pressure is high. Therefore, the opening degree of the electronic expansion valve 2 needs to be adjusted to the second opening degree, which can be the maximum opening degree of the electronic expansion valve 2. Generally, the temperature adjustment capacity of the air conditioner is set with a certain redundancy. Specifically, the maximum value of the refrigerant flow of the air conditioner is slightly larger than the refrigerant flow corresponding to the rated worst working condition of the air conditioner, or the specification of the electronic expansion valve 2 or the throttling device is set to be slightly larger than the specification corresponding to the rated worst working condition of the air conditioner, so as to meet the temperature adjustment demand of the user under extreme conditions. When the opening degree of the electronic expansion valve 2 is the maximum opening degree, the redundant temperature adjustment capacity of the air conditioner is fully utilized, and the flow of refrigerant entering the evaporator 3 is increased as much as possible, so as to improve the temperature adjustment capacity of the air conditioner as much as possible without increasing the total current of the air conditioner, thereby reducing the air conditioning system pressure and avoiding or delaying overload operation of the air conditioner.

[0113] When the first temperature is in the fourth interval, the condensate water temperature in the water storage device 4 is extremely high, or the outdoor environment temperature is extremely high. At this time, the heat dissipation capacity of the condenser 1 is extremely low, and the air conditioning system pressure is extremely high. At this time, limited by the equipment limit, even if the opening degree of the electronic expansion valve 2 is adjusted to the maximum opening degree, the temperature adjustment demand of the user cannot be met. In order to avoid the air conditioner running at the limit pressure for a long time and thus causing overload operation, the compressor is controlled to operate at a reduced frequency while the electronic expansion valve 2 is maintained at the second opening degree.

[0114] In some embodiments of the air conditioner of the present application, as shown in Figures 5-6 the air conditioner comprises a condenser 1, an electronic expansion valve 2, an evaporator 3, a water conveying device, and a water storage device 4. The electronic expansion valve 2 has a plurality of opening degrees. The water conveying device is configured to convey the condensate water generated by the evaporator 3 to the water storage device 4. The refrigerant pipeline of the condenser 1 comprises a water-cooled tube segment 5 in the water storage device 4.

[0115] The air conditioner further comprises a processor and a machine executable program stored on a memory and running on the processor, and the processor implements the control method of the air conditioner described above when executing the machine executable program.

[0116] In some embodiments of the air conditioner of the present application, the water conveying device comprises a water pump. When the water pump stops running, the working state is a non-water conveying state.

[0117] In some embodiments of the air conditioner of the present application, the water delivery device comprises a water delivery pipe and a valve arranged in the water delivery pipe; the condensed water is delivered to the water storage device 4 under gravity; when the valve is closed, the working state is the non-water delivery state.

[0118] In some embodiments of the air conditioner of the present application, as shown in Figure 5 the air conditioner further comprises a water storage device 4 arranged at the lower side of the condenser 1, and the water delivery device delivers the condensed water into the water storage device 4. A part of the condenser 1 is arranged in the water storage device 4 to contact the low-temperature condensed water and absorb the cold energy of the condensed water.

[0119] In some embodiments of the air conditioner of the present application, as shown in Figure 6 the air conditioner further comprises a water storage device 4 arranged at the lower side of the condenser 1, and the water delivery device delivers the condensed water into the water storage device 4. The condenser 1 is connected with a water-soaked pipe section 5 of the circulating refrigerant, and all or a part of the water-soaked pipe section 5 is arranged in the water storage device 4 to contact the low-temperature condensed water and absorb the cold energy of the condensed water.

[0120] In some embodiments of the air conditioner of the present application, the air conditioner further comprises a temperature sensor 6. The temperature sensor 6 is used to detect the first temperature. The temperature sensor 6 is arranged in the water storage device 4 and at the bottom of the water storage device 4, and the second temperature is represented by measuring the temperature of the condensed water in the water storage device 4.

[0121] In some embodiments of the air conditioner of the present application, as shown in Figure 6 the temperature sensor 6 is arranged on the water-soaked pipe section 5, and the first temperature is represented by measuring the temperature of the water-soaked pipe section 5.

[0122] In some embodiments of the air conditioner of the present application, as shown in Figure 5 the temperature sensor 6 is arranged at the bottom of the condenser 1, and the first temperature is represented by measuring the temperature at the bottom of the condenser 1.

[0123] Thus, those skilled in the art should recognize that, although the present application has been fully illustrated and described herein with reference to a plurality of exemplary embodiments, many other variants or modifications in accordance with the principles of the present application can be directly determined or deduced from the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all such other variants or modifications.

Claims

1. A control method of an air conditioner, characterized by, The air conditioner comprises a condenser, an electronic expansion valve, an evaporator, a water delivery device and a water storage device; the water delivery device is configured to deliver condensate water generated by the evaporator to the water storage device; The refrigerant pipeline of the condenser comprises a water-cooled tube section in the water storage device; The control method comprises: obtaining the working state of the water delivery device, and obtaining the temperature of the water-cooled tube section to obtain a first temperature, and / or obtaining the temperature of the water in the water storage device to obtain a second temperature; controlling the opening degree of the electronic expansion valve according to the working state of the water delivery device, and the first temperature and / or the second temperature; The working state comprises a water delivery state and a non-water delivery state; and the control of the opening degree of the electronic expansion valve according to the working state of the water delivery device, and the first temperature and / or the second temperature comprises: controlling the opening degree of the electronic expansion valve according to the first temperature and / or the second temperature in response to the working state being the non-water delivery state; The control of the opening degree of the electronic expansion valve according to the first temperature and / or the second temperature comprises: increasing the opening degree of the electronic expansion valve in response to the first temperature being greater than or equal to a first preset temperature; The control of the opening degree of the electronic expansion valve according to the first temperature and / or the second temperature further comprises: maintaining the current opening degree of the electronic expansion valve in response to the first temperature being less than the first preset temperature.

2. The control method according to claim 1, characterized by, The control of the opening degree of the electronic expansion valve in response to the first temperature being greater than or equal to the first preset temperature comprises: controlling the electronic expansion valve to have a first opening degree in response to the first temperature being greater than or equal to the first preset temperature and less than a second preset temperature, the second preset temperature being greater than the first preset temperature; controlling the electronic expansion valve to have a second opening degree in response to the first temperature being greater than or equal to the second preset temperature, the second opening degree being greater than the first opening degree.

3. The control method according to claim 2, characterized by, The control method further comprises: controlling the compressor of the air conditioner to operate at a reduced frequency in response to the first temperature being greater than or equal to a third preset temperature, the third preset temperature being greater than the second preset temperature, after the electronic expansion valve is controlled to have the second opening degree.

4. The control method according to claim 1, characterized by, The control method further comprises: controlling the electronic expansion valve to have a maximum opening degree and controlling the compressor of the air conditioner to operate at a reduced frequency in response to the first temperature being greater than or equal to a third preset temperature, the third preset temperature being greater than the first preset temperature.

5. The control method according to claim 2, characterized by, The first opening degree is greater than the opening degree of the electronic expansion valve when the water delivery device is in a water delivery state or when the first temperature is less than the first preset temperature.

6. The control method according to claim 1, wherein the water delivery device comprises a water pump, and the condensate water is delivered to the water storage device under the action of the water pump; the working state is the non-water delivery state when the water pump stops operating; and / or the water delivery device comprises a water delivery pipe and a valve arranged in the water delivery pipe; the condensate water is delivered to the water storage device under the action of gravity; the working state is the non-water delivery state when the valve is closed.

7. An air conditioner characterized by comprising: The air conditioner comprises a condenser, an electronic expansion valve, an evaporator, a water delivery device, and a water storage device; the water delivery device is configured to deliver condensed water generated by the evaporator to the water storage device; a refrigerant pipeline of the condenser comprises a water-wetted tube section in the water storage device; The air conditioner further comprises a processor and a machine executable program stored on a memory and running on the processor, and the processor implements the control method of the air conditioner according to any one of claims 1 to 6 when executing the machine executable program.

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