Control method of reversible air supply air conditioner and reversible air supply air conditioner

Abstract

The application relates to a control method of a reversible air supply air conditioner and the reversible air supply air conditioner, relates to the air conditioning technical field, and aims to solve the problem that the reversible air supply air conditioner will blow out more condensed water when switching from a refrigeration mode to a heating mode. The control method is applied to an indoor unit and comprises the following steps: receiving a mode switching instruction. It is judged whether the mode switching instruction is switched from the refrigeration mode to the heating mode. If yes, the running parameters in the refrigeration mode are acquired, and the condensed water generation amount is calculated. It is judged whether the condensed water generation amount in the refrigeration mode is greater than or equal to the drainage amount. If yes, the heating mode is switched, the air supply gear is adjusted to be low, and the first preset time length is run. The running parameters in the first preset time length are acquired, the condensed water evaporation amount is compared, it is judged whether the difference between the generation amount and the drainage amount is less than or equal to the evaporation amount, and if yes, the air supply gear of the heating mode is restored.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a control method of a reversible air supply air conditioner and the reversible air supply air conditioner. BACKGROUND

[0002] With the popularization of air conditioners, users have higher requirements for the comfort of air conditioners, especially the air flow organization distribution in the room. Since the cooling air flow and the heating air flow have different density difference characteristics from the indoor air flow, in order to meet the higher indoor comfort requirements of the air conditioner, the air supply mode of cold air side supply and hot air down supply needs to be used to achieve the comfort effect of "waterfall type cooling and carpet type heating".

[0003] Therefore, a fan direction changing structure needs to be arranged in the indoor unit to make the indoor unit have opposite air flow directions in the cooling mode and the heating mode. However, in the heating mode, the air in the indoor unit directly blows downward from the air outlet after flowing through the heat exchanger. If there is a large amount of condensed water attached to the heat exchanger of the indoor unit in the cooling mode before switching to the heating mode, the condensed water attached to the heat exchanger will be detached under the driving of the reversed air flow and mixed with the hot air to blow into the room in the initial stage of switching to the heating mode. SUMMARY

[0004] The present application provides a control method of a reversible air supply air conditioner and the reversible air supply air conditioner, aiming to solve the problem that the reversible air supply air conditioner blows a large amount of condensed water when switching from the cooling mode to the heating mode.

[0005] In a first aspect, the present application provides a control method of a reversible air supply air conditioner, applied to an indoor unit, comprising:

[0006] receiving a mode switching instruction.

[0007] determining whether the mode switching instruction is switched from the cooling mode to the heating mode.

[0008] If yes, obtaining the running parameters in the cooling mode and calculating the condensed water generation amount. The running parameters include the running time, the air supply gear, the air supply temperature, the return air temperature, the air supply humidity and the return air humidity in the cooling mode.

[0009] determining whether the condensed water generation amount in the cooling mode is greater than or equal to the drainage amount.

[0010] If yes, switching to the heating mode and lowering the air supply gear, and running for a first preset time.

[0011] obtaining the running parameters in the first preset time and the condensed water evaporation amount, and determining whether the difference between the generation amount and the drainage amount is less than or equal to the evaporation amount.

[0012] If yes, the air supply position of the heating mode is restored.

[0013] In some embodiments, switching to the heating mode and adjusting the air supply position to a low position for a first preset time period includes:

[0014] Switching to the heating mode and turning off the air supply for a second preset time period.

[0015] Adjusting the air supply position to a low position for a third preset time period.

[0016] The first preset time period includes the second preset time period and the third preset time period.

[0017] In some embodiments, the difference between the generated amount and the drainage amount is greater than the evaporation amount, and the control method includes:

[0018] Returning to the step of switching to the heating mode and adjusting the air supply position to a low position for a first preset time period.

[0019] In some embodiments, the calculation formula of at least one of the generated amount and the evaporation amount is:

[0020] Q1=0.00085×Q2×(d1-d2).

[0021] Wherein, Q2 is the air flow, which is obtained by the air supply position and the running time. d1 is the air supply moisture content, which is obtained by the air supply temperature and the air supply humidity. d2 is the return air moisture content, which is obtained by the return air temperature and the return air humidity.

[0022] In some embodiments, the drainage amount is calculated according to the drainage speed of the indoor unit and the running time.

[0023] In some embodiments, the evaporation amount is a preset value.

[0024] In some embodiments, the generated amount of condensate water in the cooling mode is less than the drainage amount, and the control method includes:

[0025] Maintaining the cooling mode and closing the refrigerant circulation, adjusting the air supply position to the maximum and running for a fourth preset time period.

[0026] Switching to the heating mode.

[0027] In some embodiments, switching to the heating mode includes:

[0028] Switching to the heating mode and turning off the air supply for a fifth preset time period.

[0029] Turning on the air supply and restoring the air supply position of the heating mode.

[0030] In some embodiments, in the heating mode, the air outlet direction of the indoor unit is set downward. In the cooling mode, the air flow direction of the indoor unit is opposite to that in the heating mode.

[0031] In a second aspect, the present application provides a reversible air supply air conditioner, comprising an indoor unit and a control module, the control module being configured to execute the control method of the reversible air supply air conditioner according to the first aspect, and the indoor unit comprising:

[0032] a casing, the casing being provided with a first air outlet and a second air outlet, the first air outlet being arranged downwardly, and the second air outlet being arranged at a side wall of the casing.

[0033] a heat exchanger arranged in the casing.

[0034] a fan arranged in the casing, the fan having a first state and a second state. In the cooling mode, the fan is in the first state and drives air to be blown out of the second air outlet. In the heating mode, the fan is in the second state and drives air to be blown out of the first air outlet.

[0035] a water pan arranged in the casing and below the heat exchanger.

[0036] a first temperature sensor arranged between the first air outlet and the heat exchanger.

[0037] a second temperature sensor arranged between the second air outlet and the heat exchanger.

[0038] a first humidity sensor arranged between the first air outlet and the heat exchanger.

[0039] a second humidity sensor arranged between the second air outlet and the heat exchanger.

[0040] In some embodiments, the water pan comprises:

[0041] a disc-shaped body having a water receiving cavity with an open side and a drain port communicating with the water receiving cavity. In the water receiving cavity, the disc-shaped body is provided with a raised portion to form a drain groove between the raised portion and a side wall of the water receiving cavity. The raised portion is configured to support the heat exchanger.

[0042] a water level sensor arranged in the water receiving cavity.

[0043] In some embodiments, the raised portion extends along a length direction of the disc-shaped body, and the drain port is arranged spaced apart from the raised portion along the length direction of the disc-shaped body.

[0044] Between the raised portion and the drain port, the disc-shaped body is provided with a filter hole communicating with the water receiving cavity. The water pan comprises a cover detachably connected with the filter hole.

[0045] In a third aspect, the present application provides a control device of an air conditioner, comprising at least one communication interface, at least one bus connected with the at least one communication interface, at least one processor connected with the at least one bus, and at least one memory connected with the at least one bus. The processor is configured to execute the control method of the reversible air supply air conditioner in the first aspect.

[0046] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions for executing the control method of the reversible air supply air conditioner in any one of the aspects of the present application.

[0047] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following advantages:

[0048] In the process of controlling the operation condition of the reversible air supply air conditioner by the above control method, when the air conditioner switches from the cooling mode to the heating mode, the system first determines whether excessive condensate water is generated in the cooling stage. If the generation amount exceeds the drainage amount, after switching to the heating mode, the air supply operation stage in the low gear or zero gear is entered. By reducing the air supply amount to prolong the contact time of air and the heat exchanger, the evaporation speed of the condensate water is improved. That is, in the case of lower air supply gear, the evaporation efficiency is improved due to the reduced air flow rate, and the residual condensate water is gradually reduced. In this process, the evaporation amount is continuously monitored until it covers the difference between the residual water amount, and then the normal heating air supply parameters are restored to improve the heating speed in the room.

[0049] The present application actively controls the air supply parameters to adjust the evaporation process, solves the problem that the condensate water is mixed in the heating air supply mode due to insufficient drainage capacity, and avoids the situation that the condensate water is blown out to affect the indoor hygiene and decoration environment, and is beneficial to improve the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0052] One or more embodiments are illustrated by way of example in the drawings in which like reference numerals indicate like elements, and in which: the drawings are not necessarily to scale, unless otherwise specifically noted.

[0053] Figure 1 An air outlet schematic view of a reversible air supply air conditioner in a cooling mode according to an embodiment of the present application;

[0054] Figure 2 An air outlet schematic view of a reversible air supply air conditioner in a heating mode according to an embodiment of the present application;

[0055] Figure 3 An electrical connection schematic view of a reversible air supply air conditioner according to an embodiment of the present application;

[0056] Figure 4 A perspective structural schematic view of a water receiving tray shown in Figure 1

[0057] A perspective structural schematic view of a water receiving tray shown in Figure 5 Figure 4 An installation structural schematic view of a water receiving tray and a heat exchanger shown in

[0058] Figure 6 Figure 1 An installation structural schematic view of a water receiving tray and a heat exchanger shown in

[0059] Figure 7 A control method flow chart of a reversible air supply air conditioner according to an embodiment of the present application;

[0060] Figure 8 A structural schematic view of a control device of an air conditioner according to an embodiment of the present application.

[0061] BRIEF DESCRIPTION OF DRAWINGS

[0062] 100, indoor unit; 110, casing; 111, first air outlet; 112, second air outlet; 120, heat exchanger; 130, fan; 140, water receiving tray; 141, tray-shaped main body; 1411, water receiving cavity; 1412, water outlet; 1413, protruding part; 1414, water drainage groove; 1415, filter hole;

[0063] 142, water level sensor; 143, cover; 151, first temperature sensor; 152, second temperature sensor; 153, first humidity sensor; 154, second humidity sensor;

[0064] 200, control module; 210, processor; 220, communication interface; 230, memory; 240, communication bus. DETAILED DESCRIPTION​​

[0065] The technical solutions and advantages of the embodiments of the present application will become more apparent from the following description of the embodiments of the present application, which are illustrated in the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of the present application.

[0066] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of particular examples in the following description are shown in the drawings. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application can refer to a reference numeral and / or letter in different examples. Such repetition is for the purpose of simplicity and clarity and does not indicate the relationship between the various embodiments and / or settings discussed.

[0067] For the purpose of description, spatial relative terms as shown in the drawings can be used to describe the relative position relationship or movement of one element or feature with respect to another element or feature, such as "internal", "external", "inboard", "outboard", "under", "below", "on", "above", "front", "back", and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "over" the other element or feature. Therefore, the example term "below" can include both upward and downward positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0068] Figure 1 A schematic view of air outlet of a reversible air supply air conditioner in a cooling mode is provided for the embodiments of the present application. Figure 2 A schematic view of air outlet of a reversible air supply air conditioner in a heating mode is provided for the embodiments of the present application. Figure 3 A schematic view of electrical connection of a reversible air supply air conditioner is provided for the embodiments of the present application. Figure 4 A schematic view of a water collecting tray is provided for the embodiments of the present application. Figure 1 A schematic view of a water collecting tray is provided for the embodiments of the present application. Figure 5 A schematic view of a water collecting tray is provided for the embodiments of the present application. Figure 4 A schematic view of a water collecting tray is provided for the embodiments of the present application. Figure 6 A schematic view of a water collecting tray is provided for the embodiments of the present application.Figure 1 An installation structure diagram of a water pan and a heat exchanger. Figure 7 A control method flow chart of a reversible air supply air conditioner provided in an embodiment of the present application. Figure 8 A structure diagram of a control device of an air conditioner provided in an embodiment of the present application.

[0069] Please refer to Figures 1 to 8 The present application provides a control method of a reversible air supply air conditioner and the reversible air supply air conditioner, aiming at solving the problem that the reversible air supply air conditioner will blow out more condensed water when switching from the refrigeration mode to the heating mode.

[0070] Embodiment one

[0071] As shown in Figure 1 and Figure 2 The present application provides a reversible air supply air conditioner, which comprises an indoor unit 100, and the indoor unit 100 comprises a casing 110, a heat exchanger 120, a fan 130, a water pan 140, a first temperature sensor 151, a second temperature sensor 152, a first humidity sensor 153 and a second humidity sensor 154.

[0072] The casing 110 is provided with a first air outlet 111 and a second air outlet 112, and the first air outlet 111 is arranged downward, and the second air outlet 112 is located at the side wall of the casing 110. The first air outlet 111 is arranged downward so that the indoor unit 100 can send air downward through the first air outlet 111 in the heating mode, which helps the hot air to rise naturally to form a carpet heating effect. The second air outlet 112 is located at the side wall of the casing 110 so that the indoor unit 100 can send air laterally through the second air outlet 112 in the refrigeration mode, so that the cold air is horizontally diffused and settled to form a waterfall refrigeration effect.

[0073] The heat exchanger 120 and the fan 130 are arranged in the casing 110. The fan 130 has a first state and a second state. The fan 130 can switch between the first state and the second state by switching the direction of the air outlet. Taking the centrifugal fan as an example, the direction of the air outlet can be adjusted by changing the volute structure, or the air outlet can be directed to the first air outlet 111 or the second air outlet 112 by rotating the volute. If the fan 130 is an axial fan, the direction of the air outlet can be changed by switching the rotation direction of the blades.

[0074] As shown in Figure 1 In the refrigeration mode, the fan 130 is in the first state and the air outlet is arranged to face the second air outlet 112, so as to drive the air to flow into the first air outlet 111 and blow out from the second air outlet 112 after flowing through the heat exchanger 120. As shown in Figure 2As shown, in the heating mode, the fan 130 is in the second state and the air outlet is arranged towards the first air outlet 111 to drive air to flow from the second air outlet 112 and be blown out from the first air outlet 111 after flowing through the heat exchanger 120. By switching the air supply direction, the air outlet adjustment effect can be flexibly adjusted between the cooling mode and the heating mode.

[0075] The water pan 140 is arranged in the cabinet 110 and below the heat exchanger 120, used to collect and store the condensed water dropped from the heat exchanger 120, so as to uniformly discharge the collected condensed water. The first temperature sensor 151 and the first humidity sensor 153 are arranged between the first air outlet 111 and the heat exchanger 120, and the second temperature sensor 152 and the second humidity sensor are arranged between the second air outlet 112 and the heat exchanger 120. Used to detect the temperature and humidity of the return air and the supply air before and after flowing through the indoor heat exchanger 120.

[0076] In combination Figure 3 , the air conditioner further comprises a control module 200, which is electrically connected with the fan 130, the first temperature sensor 151, the second temperature sensor 152, the first humidity sensor 153 and the second humidity sensor 154. So that the control module 200 can collect the operating parameters of the air conditioner and control the corresponding devices. For example, the control module 200 can obtain the operating parameters such as supply air temperature, return air temperature, supply air humidity and return air humidity through the first temperature sensor 151, the second temperature sensor 152, the first humidity sensor 153 and the second humidity sensor 154. The control module 200 can also control the speed of the fan 130 to adjust the corresponding supply air position, etc.

[0077] Based on this, the control module 200 is configured to execute the operation steps of the control method of the reversible air supply air conditioner.

[0078] Embodiment two

[0079] The present application provides a control method of a reversible air supply air conditioner, which can be run in an air conditioner, a ducted air conditioner, an indoor unit 100, a control module 200 or similar devices. For example, the control method is run in a reversible air supply air conditioner. The execution steps of the control method can be automatically run by the configuration of the control module 200. The steps of the control method can also be manually executed by manual operation, which is not limited.

[0080] For example, as Figure 7 shown, the control method of the reversible air supply air conditioner comprises the following steps:

[0081] Step S100: receiving a mode switching instruction.

[0082] Optionally, the control module 200 of the air conditioner can automatically issue a switching operation mode instruction according to the implementation running state. The operation mode instruction can also be issued by manual operation through a remote controller or a smart control terminal. Both will trigger and execute the subsequent steps.

[0083] Step S210: Determine whether the mode switching instruction is switched from the refrigeration mode to the heating mode.

[0084] The operation mode of the air conditioner includes: refrigeration mode, heating mode, dehumidification mode, air supply mode and fresh air mode, etc. Among them, the dehumidification mode can be regarded as part of the refrigeration mode. When the indoor unit 100 is in the refrigeration mode or the dehumidification mode, the temperature of the heat exchanger 120 is lower than the dew point temperature, so that the air is cooled after flowing through the heat exchanger 120, and the condensed water is precipitated on the heat exchanger 120 at the same time. Part of the condensed water is attached to the outer wall and fins of the heat exchanger 120, and the other part of the condensed water is dripped into the water pan 140 under the action of gravity and wind, and then discharged from the indoor unit 100 under the action of gravity or pump through the corresponding pipeline.

[0085] Because the indoor unit 100 is in the refrigeration mode or the dehumidification mode during operation, a large amount of condensed water is attached to the heat exchanger 120. In the reversible air supply air conditioner, if it is directly switched to the heating mode, the air flow in the indoor unit 100 is reversed and flows through the heat exchanger 120. The reverse flow of the air flow will blow the condensed water attached to the surface of the heat exchanger 120 away, and the condensed water will be mixed with the air flow and blown to the indoor, thereby causing the indoor unit 100 to be in the initial stage of the heating mode. The air flow is mixed with the condensed water.

[0086] Based on this, the mode switching instruction can be determined by step S210. If it is in the refrigeration mode (including the dehumidification mode) before switching to the heating mode, the corresponding steps are taken to solve the problem of the air flow mixed with the condensed water in the initial stage of the heating mode.

[0087] Step S220: If yes, obtain the operation parameters in the refrigeration mode and calculate the amount of condensed water generated. The operation parameters include the operation time of the refrigeration mode, the air supply gear, the air supply temperature, the return air temperature, the air supply humidity and the return air humidity.

[0088] For example, the air supply temperature, the return air temperature, the air supply humidity and the return air humidity can be collected by the first temperature sensor 151, the second temperature sensor 152, the first humidity sensor 153 and the second humidity sensor 154 arranged on the front and back sides of the heat exchanger 120.

[0089] The parameters of the supply air temperature, the return air temperature, the supply air humidity and the return air humidity are continuously acquired. The shorter the interval time is, the more accurate the calculation data of the condensate generation amount and the evaporation amount in the subsequent calculation process is. The longer the interval time is, the lower the load pressure of the control module 200 is, which is beneficial to the stable operation of the system.

[0090] It should be noted that on the same side of the heat exchanger 120, the first temperature sensor 151 and the first humidity sensor 153 form a group, and the second temperature sensor 152 and the second humidity sensor 154 form a group. In each group of sensors, there can be two independent sensor modules, or the sensors in each group can be set as an integrated structure. That is, the first temperature sensor 151 and the first humidity sensor 153 can be a first temperature and humidity sensor, and the second temperature sensor 152 and the second humidity sensor 154 can be a second temperature and humidity sensor, which is beneficial to reducing the number of parts.

[0091] For the running time length of the refrigeration mode, the control module 200 can acquire the running time of the refrigeration mode in real time and accumulate according to the built-in timing unit. The supply air position can be acquired by the built-in air volume sensor in the indoor unit 100, which is used to represent the total air circulation amount (i.e. air flow Q2) in the refrigeration mode. Alternatively, the running position of the fan 130 in the refrigeration mode can also be directly acquired, and the total air circulation amount in the refrigeration mode can be calculated according to the preset parameters (i.e. the air circulation amount corresponding to each position) and the running time length.

[0092] It should be noted that the step S220 can be executed before the step S210, or can be executed after the step S210, or can be executed synchronously with the step S210, which will not affect the acquisition effect of the operating parameters.

[0093] Step S230: determining whether the condensate generation amount in the refrigeration mode is greater than or equal to the drainage amount.

[0094] Optionally, in the step S230, a camera module can be built-in in the indoor unit 100, which is used to acquire the image information of the heat exchanger 120, and is used to identify whether the surface of the heat exchanger 120 is attached with condensate. If yes, it means that the condensate generation amount is greater than or equal to the drainage amount. That is, the step S310 is executed.

[0095] Alternatively, the condensate generation amount in the running time can also be calculated according to the operating parameters acquired in the step S220. In the refrigeration mode, the first temperature sensor 151 and the first humidity sensor 153 are used to acquire the return air temperature and the return air humidity, and the second temperature sensor 152 and the second humidity sensor 154 are used to acquire the supply air temperature and the supply air humidity.

[0096] The return air humidity d2 of the return air flow can be obtained by the return air temperature, the return air humidity, and the preset relative humidity curve. The supply air humidity d1 of the supply air flow can be obtained by the supply air temperature, the supply air humidity, and the preset relative humidity curve. The proportion of the amount of condensed water generated per unit volume (or per unit weight) of air flowing through the heat exchanger 120 can be obtained by the difference, i.e., d1-d2. Wherein, d1-d2>0 indicates that the heat exchanger 120 generates condensed water, which is used to calculate the generation amount of condensed water. d1-d2<0 indicates that the heat exchanger 120 is in a heating and evaporation state, which is used to calculate the evaporation amount of condensed water.

[0097] The calculation formula of the generation amount of condensed water can be: Q1=0.00085×Q2×(d1-d2). When Q1 is positive, the numerical value is the generation amount of condensed water. When Q1 is negative, the numerical value is the evaporation amount of condensed water.

[0098] Alternatively, the drainage amount refers to the amount of condensed water discharged from the water pan 140 within the running time. The drainage amount can be a calibrated preset parameter, such as the drainage speed per unit time, and the generation amount can also be converted into the condensed water generation speed per unit time for comparison of the numerical values of the generation amount and the drainage amount.

[0099] The drainage amount and the generation amount can also be directly converted into the weight within the running time for comparison of the two.

[0100] The drainage amount can be a constant value calibrated by experiment. The total water amount (i.e., the drainage amount) discharged from the water pan 140 within the running time can also be monitored by setting a flow sensor or a water level sensor at the water pan 140, which is not limited.

[0101] For example, if the generation amount of condensed water is greater than or equal to the drainage amount, it indicates that there is more condensed water attached to the surface of the heat exchanger 120, and step S310 needs to be performed to avoid directly blowing out the condensed water at the initial stage of the heating mode.

[0102] Step S310: If yes, switch to the heating mode and lower the supply air gear, and run for a first preset time length.

[0103] In the air conditioning system, switching to the heating mode means adjusting the connection mode of the four-way valve to make the outdoor heat exchanger refrigerate. If the indoor unit 100 is a direct cooling type structure, the refrigerant flowing through the heat exchanger 120 is in a liquefied heat release state. If the heat exchanger 120 of the indoor unit 100 is connected to circulating water, the hot water circulation is started to make the heat exchanger 120 heat.

[0104] In the process of switching from the refrigeration mode to the heating mode, since the fan blowing directions of the heating mode and the refrigeration mode are different. If the wind direction is changed by adjusting the rotation direction of the fan 130, the control module 200 controls the fan to stop first, and then remains in the stop state or runs in the reverse low gear according to the needs.

[0105] If the fan 130 is a centrifugal fan, in the process of switching from the refrigeration mode to the heating mode by the control module 200, the fan 130 is synchronously controlled to switch to a smaller blowing gear or stop. In order to avoid that the reverse airflow with a larger blowing gear directly blows the condensed water attached to the heat exchanger 120 to the indoor.

[0106] S320: Obtain the running parameters and the condensate evaporation amount within the first preset time length, and determine whether the difference between the generation amount and the drainage amount is less than or equal to the evaporation amount.

[0107] In step S310, by the blowing amount of the low gear or the zero gear, the heat exchanger 120 in the heating mode can quickly heat the air and the attached condensed water in the vicinity, for the rapid evaporation of the condensed water, so as to reduce the attachment amount of the condensed water on the heat exchanger 120.

[0108] Among them, since in step S310 the compressor can be in a full-power heating operation state, the corresponding low-gear air volume or zero-gear air volume is superimposed, so that the evaporation amount of the condensed water is within the preset range of 3-5 g / min. That is, the evaporation speed can be set as a fixed parameter, and the corresponding evaporation amount is calculated according to the first preset time length.

[0109] Subsequently, the difference between the generation amount and the drainage amount of the condensed water in the aforementioned refrigeration mode is calculated, which can be regarded as the attachment amount of the condensed water on the heat exchanger 120. In the first preset time length, the evaporation amount and the attachment amount are compared to determine whether the heat exchanger 120 still has condensed water attached thereto.

[0110] S330: If yes, the blowing gear of the heating mode is restored.

[0111] In step S320, the attachment amount is less than or equal to the evaporation amount. That is, the condensed water attached to the surface of the heat exchanger 120 is completely evaporated, or only a small amount of condensed water is left, which will not cause the situation that the condensed water is entrained in the blowing airflow in the heating mode.

[0112] Based on this, in step S330, the normal blowing gear of the heating mode can be adjusted and restored to improve the air circulation amount and the heating speed, and the condensed water will not be entrained in the heating airflow.

[0113] In the process of controlling the operation condition of the reversible air supply air conditioner by the above control method, when the air conditioner switches from the cooling mode to the heating mode, the system first determines whether excessive condensate water is generated in the cooling stage. If the generation amount exceeds the drainage amount, after switching to the heating mode, the air supply operation stage of the low gear or zero gear is entered. By reducing the air supply amount to prolong the contact time of the air and the heat exchanger 120, the evaporation speed of the condensate water is improved. That is, in the case of a lower air supply gear, the air flow rate is reduced to improve the evaporation efficiency, and the residual condensate water is gradually reduced. In this process, the evaporation amount is continuously monitored until it covers the difference between the residual water amount, and the normal heating air supply parameters are restored to improve the heating speed in the room.

[0114] The present scheme adjusts the evaporation process by actively controlling the air supply parameters, solves the problem of condensate water mixed in the heating air supply mode caused by insufficient drainage capacity. If only relying on gravity drainage, when the drainage pipe is blocked, the condensate water cannot be effectively handled, and the present scheme compensates for the limitations of the drainage system through the evaporation mechanism, avoids the situation that the air supply is mixed with condensate water when switching to the heating condition, avoids the influence of blown condensate water on indoor hygiene and decoration environment, and is beneficial to improve the user experience.

[0115] It should be noted that the control method of the reversible air supply air conditioner can be applied to the indoor unit 100 in the previous embodiment. The corresponding steps can be automatically executed by the control module 200, or the steps of the control method can be executed by other means. Both can achieve the above effects, and will not be described here.

[0116] In some embodiments, as shown in Figure 7 Step S310 includes:

[0117] Step S311: Switch to the heating mode and close the air supply, and run for a second preset time length.

[0118] In the case of switching to the heating mode and closing the air supply, the air flow can be reduced to enable the heat exchanger 120 in the indoor unit 100 to quickly heat the attached condensate water and the nearby air, thereby increasing the air temperature and water content to improve the evaporation efficiency of the condensate water.

[0119] Step S312: Adjust the air supply gear to a low gear state, and run for a third preset time length.

[0120] In the case of switching to the heating mode and adjusting the air supply gear to a low gear, the air flow rate is lower, so that the heat exchanger 120 can heat the condensate water and the air flowing through it, so as to quickly take away the evaporated water vapor by more hot air while ensuring the heating temperature of the condensate water.

[0121] On this basis, the combination of step S311 and step S312. In step S311, the closing of the air supply gear can improve the heating effect on the surrounding air and the condensed water, so that the condensed water and the surface of the heat exchanger 120 have a higher temperature. After continuing for a second preset time, the heating temperature of the heat exchanger 120 remains stable, and the air flowing through can be quickly heated. Then switch the air supply gear to a low gear state to increase the air flow. Since the heat exchanger 120 and the condensed water have a higher temperature at this time, the air flowing through can be quickly heated and the evaporation speed of the condensed water is further improved. And the lower air supply gear will not cause the attached condensed water to be blown away from the heat exchanger 120.

[0122] In this way, while ensuring the evaporation amount of the condensed water, the standby time of the heating mode can be reduced. Under the same standby time of the heating mode, the evaporation amount of the condensed water can be improved.

[0123] The first preset time includes a second preset time and a third preset time. When only step S311 or step S312 is executed, the first preset time is the second preset time or the third preset time. When step S311 and step S312 are executed in sequence, the first preset time is the sum of the second preset time and the third preset time. For example, the second preset time can be 50-70 seconds, i.e. the second preset time can be 50s, 55s, 60s, 65s or 70s. The third preset time can be 25-35 seconds, i.e. the third preset time can be 25s, 30s or 35s. For example, the second preset time and the third preset time are 60 seconds and 30 seconds, which are shorter and easier to calculate to reduce the calculation amount.

[0124] In step S330, if the difference between the generated amount and the drainage amount is greater than the evaporation amount, as shown in the figure, the control method further includes returning to execute step S310. The evaporation step is repeatedly executed until the attachment amount of the condensed water is less than or equal to the total evaporation amount. Figure 7

[0125] It should be noted that in step S320, the operating parameters obtained and calculated are only the operating parameters during the execution of step S310. The operating time of steps S311 and S312, the air supply gear, the return air temperature, the supply air temperature, the supply air humidity and the return air humidity.

[0126] In step S311, since there is no air circulation amount or very little air circulation amount, the evaporation amount in this evaporation process can be obtained by experiment and set as a fixed evaporation parameter in the control module 200, such as 3-5g / min.

[0127] ​In some embodiments, in step S230, if the amount of condensate generated in the refrigeration mode is less than the amount of drainage, it indicates that there is no condensate or less condensate attached to the heat exchanger 120. Based on this, as shown in FIG. 4, the control method further includes: Figure 7

[0128] Step S400: Keep the refrigeration mode and close the refrigerant circulation, adjust the air supply gear to the maximum and run for a fourth preset time length.

[0129] In which, keeping the refrigeration mode and closing the refrigerant circulation means stopping the circulation of refrigerant in the heat exchanger 120, but maintaining the operation of the fan, thereby saving the operating power consumption of the compressor. If the heat exchanger 120 is a direct cooling structure, i.e. the refrigerant changes phase in the heat exchanger 120, the compressor is stopped at the same time. If the refrigerant flowing in the heat exchanger 120 is circulating water, the operation of the circulating water pump is stopped, and the compressor can be adjusted or closed in real time according to the operating power.

[0130] Subsequently, by adjusting the fan gear to the maximum and running for a fourth preset time length, a small amount of condensate possibly attached to the surface of the heat exchanger 120 is blown off by a higher air speed, so that the condensate is collected in the water pan 140 and can be concentrated and discharged within the fourth preset time length. By continuing for the fourth preset time length (such as 25-35 seconds), the condensate attached to the surface of the heat exchanger 120 is further reduced. And the water pan 140 can continuously discharge the collected condensate to reduce the amount of condensate in the water pan 140 and reduce the liquid level.

[0131] In which, the fourth preset time length can be 25s, 30s or 35s, which is not limited.

[0132] It should be noted that in step S400, since there is only a small amount of condensate in the heat exchanger 120 and the water pan 140, and the position relationship and shape between the second air outlet 112, the water pan 140 and the heat exchanger 120 are matched, even if the air supply gear is adjusted to the maximum in the refrigeration mode, the condensate will not be blown out of the second air outlet.

[0133] Step S500: Switch to the heating mode.

[0134] Since the condensate in the heat exchanger 120 and the water pan 140 has been further discharged through step S400. It can be directly switched to the normal heating mode to quickly heat the indoor air. That is, adjust the direction of the four-way valve to make the refrigerant liquefy and release heat in the heat exchanger 120, or start the hot water pump to make the circulating hot water flow through the heat exchanger 120. At the same time, adjust the air supply gear to the maximum gear or a preset gear, change the direction of the indoor unit 100 air outlet, and quickly heat the indoor air by a large air circulation amount.

[0135] In other embodiments, as shown in FIG. 5, the control method further includes:​Figure 7 As shown, step S500 includes:

[0136] Step S510: Switch to heating mode and close the air supply, run for a fifth preset time length.

[0137] Step S520: Turn on the air supply and restore the air supply gear of the heating mode.

[0138] In step S510, in the case of switching to heating mode and closing the air supply, the air flow can be reduced to enable the heat exchanger 120 in the indoor unit 100 to quickly heat the condensed water attached and the air nearby, thereby increasing the air temperature and water content to improve the evaporation efficiency of the condensed water. Since there is only a small amount of condensed water in the indoor unit 100 at this time, the fifth preset time length can be set to 20-30 seconds, which can further reduce the amount of condensed water in the heat exchanger 120 and the water pan 140. For example, the fifth preset time length is 20s, 25s or 30s.

[0139] Subsequently, step S520 can be performed to start the normal heating mode, thereby quickly heating the indoor air.

[0140] It should be noted that in step S500, step S520 can be executed directly after step S400 to improve the starting speed of the heating mode and avoid the condensed water being blown out, thereby improving the rapid heating demand under the demand of the heating mode.

[0141] Alternatively, after step S400, steps S510 and S520 can be executed in sequence to further reduce the amount of residual condensed water in the indoor unit 100 in the cooling mode. Thus, the pollution of decoration and environment caused by the ejection of condensed water at the initial stage of switching from cooling mode to heating mode is avoided.

[0142] Embodiment Three

[0143] As shown in Figure 4 and Figure 5 The water pan 140 includes a disc-shaped body 141 and a water level sensor 142. The disc-shaped body 141 has a water receiving cavity 1411 with one side open and a drain port 1412 communicating with the water receiving cavity 1411. In the water receiving cavity 1411, the disc-shaped body 141 is provided with a protruding portion 1413 to form a drain groove 1414 between the protruding portion 1413 and the side wall of the water receiving cavity 1411. In combination Figure 6 , the protruding portion 1413 is used to support the heat exchanger 120. The water level sensor 142 is arranged in the water receiving cavity 1411.

[0144] By setting the protruding part 1413 in the water receiving cavity 1411 for contacting the heat exchanger 120, the excessive part of the heat exchanger 120 is avoided to be set in the water receiving cavity 1411, which is beneficial to improve the contact heat exchange area of the heat exchanger 120 with the air, thereby improving the heat exchange efficiency. Due to the setting of the protruding part 1413, in the plane perpendicular to the up-down direction, the drain groove 1414 has a smaller cross-sectional area, which is beneficial to improve the water accumulation height of the condensed water in the drain groove 1414, and the condensed water with a higher water level is convenient for the rapid discharge of the condensed water.

[0145] On this basis, as shown in Figure 3 , by setting the water level sensor 142 to be electrically connected with the control module 200, the control module 200 can obtain the liquid level height of the condensed water through the water level sensor 142 located in the water receiving cavity 1411 (as shown in Figure 4 ).

[0146] Among them, the water level sensor 142 is set at a specific height in the water receiving cavity 1411. For example, the distance between the water level sensor 142 and the upper opening of the water receiving cavity 1411 in the up-down direction is greater than or equal to 10 mm. At this time, the setting height of the water level sensor 142 can be used as a warning water level. When the control module 200 detects that the liquid level height in the water receiving tray 140 reaches the warning water level through the water level sensor 142, the control module 200 can avoid executing steps S400, S500, S330, etc. At this time, the control module 200 can repeatedly execute step S320 until the condensed water in the water receiving tray 140 is discharged and evaporated.

[0147] As shown in Figure 4 , the protruding part 1413 extends along the length direction of the disc-shaped body 141, and the drain port 1412 is arranged in the length direction of the disc-shaped body 141 and is spaced apart from the protruding part 1413. Between the protruding part 1413 and the drain port 1412, the disc-shaped body 141 is provided with a filter hole 1415 communicating with the water receiving cavity 1411. The water receiving tray 140 includes a cover 143 detachably connected with the filter hole 1415.

[0148] By setting the filter hole 1415 at the bottom wall of the drain groove 1414 flowing to the drain port 1412, dust or impurities with a higher density can be precipitated and accumulated in the filter hole 1415, so as to avoid blocking the drain port 1412 and the drain pipe. By the detachable cover 143 structure, the cover 143 can be regularly detached to clean the accumulated impurities in the filter hole 1415, so as to keep the drain port 1412 and the drain pipe unobstructed.

[0149] On this basis, through the continuous evaporation of the heat exchanger 120 under the condition of no wind or low wind in the heating mode, the condensed water in the water pan 140 can also be reduced or dried, avoiding the generation of odor after the condensed water is not completely discharged and remains for a long time, affecting the indoor comfort.

[0150] For example, along the length direction of the disc-shaped body 141, the bottom height of the drainage groove 1414 gradually decreases towards the drainage port 1412. The drainage port 1412 is at the lowest position of the water receiving cavity 1411, which facilitates smooth drainage of accumulated water and avoids accumulation of condensed water in the water receiving cavity 1411.

[0151] Between the protruding portion 1413 and the drainage port 1412, the side wall of the water receiving cavity 1411 gradually decreases in the width direction. Along the length direction of the disc-shaped body 141, the water receiving cavity 1411 has a smaller width near the drainage port 1412, which is beneficial to increase the contact area of the filter hole 1415 and the condensed water, thereby improving the filtering and sedimentation effect.

[0152] In some embodiments, when the control module 200 receives a mode switching instruction, it is determined whether the current mode is a cooling mode. If it is not a cooling mode, the heating mode is normally started.

[0153] If the current mode is a cooling mode, the control module 200 collects operating parameters in the cooling mode, including operating time, supply air position, supply air temperature, return air temperature, supply air humidity and return air humidity, to calculate the amount of condensed water generated and the amount of water drained in the cooling mode.

[0154] Subsequently, the control module 200 determines whether the amount of condensed water generated in the cooling mode is greater than or equal to the amount of water drained.

[0155] If yes, the heating mode is switched, at which time the fan 130 runs at a first state low position or stops to make the heat exchanger 120 quickly evaporate the condensed water attached to the surface, and the water pan 140 can further increase the amount of water drained, and the heat exchanger 120 can also evaporate the residual condensed water in the water pan 140. After the fan 130 stops for a second preset time length and the fan 130 runs at a low speed for a third preset time length, the evaporation amount and the above-mentioned residual amount of condensed water are compared, and the fan 130 is started to the maximum position or the normal heating setting position after the evaporation amount is larger.

[0156] If the control module 200 determines that the amount of condensed water generated in the cooling mode is less than the amount of water drained, the cooling mode is maintained and the refrigerant supply is cut off, and the fan 130 is adjusted to the maximum speed for a fourth preset time length to blow the less condensed water attached to the heat exchanger 120 into the water pan 140 and drain it out.

[0157] Then, the heating mode is entered and the air outlet direction of the fan 130 is adjusted. The speed of the fan 130 is adjusted to a low setting to further evaporate the residual condensate at the heat exchanger 120 and the water tray 140, and after the fifth preset time, the speed of the fan 130 is adjusted to the maximum setting or the normal heating setting.

[0158] Example 4

[0159] In some embodiments, such as Figure 8 As shown in the figure, this application embodiment provides a control device for an air conditioner, namely a control module 200. The control module includes a processor 210, a communication interface 220, a memory 230, and a communication bus 240. The processor 210, communication interface 220, and memory 230 communicate with each other via the communication bus 240. The memory 230 is used to store computer programs.

[0160] In one embodiment of this application, when the processor 210 executes the computer program stored in the memory 230, it implements the execution steps of the control method for the reversible air-conditioning unit provided in any of the foregoing method embodiments.

[0161] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it implements the execution steps of the control method for the reversible air-supplying air conditioner provided in any of the foregoing method embodiments.

[0162] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0163] Those skilled in the art can clearly understand the implementation of the embodiments by the description of the above embodiments. The embodiments can be implemented by means of software on a general hardware platform, and of course, can also be implemented by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, and the computer software product can be stored in a computer readable storage medium, such as a ROM (Read-Only Memory), a RAM (Random Access Memory), a magnetic disk, an optical disk, and the like, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of the embodiments or some parts of the embodiments.

[0164] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be used only to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms when used herein do not imply a sequential or chronological order. Therefore, a first element, component, region, layer or section discussed below can be referred to as a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0165] The above description is merely one specific implementation of the present application, and thus many modifications can be made by those skilled in the art without departing from the spirit or scope of the application. Accordingly, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for a reversible air-supply air conditioner, applied to the indoor unit, characterized in that, include: Receive mode switching command; Determine whether the mode switching command has switched from cooling mode to heating mode; If so, obtain the operating parameters under the cooling mode and calculate the amount of condensate generated; the operating parameters include the operating time of the cooling mode, the air supply level, the air supply temperature, the return air temperature, the air supply humidity, and the return air humidity; Determine whether the amount of condensate generated in the cooling mode is greater than or equal to the amount of water drained; If so, switch to heating mode and reduce the fan speed to run for the first preset time; Obtain the operating parameters and condensate evaporation within the first preset time period, and determine whether the difference between the generation amount and the drainage amount is less than or equal to the evaporation amount; If so, restore the fan speed of the heating mode; The first preset duration for switching to heating mode and reducing the fan speed includes: Switch to heating mode and turn off the fan, then run for the second preset duration; Adjust the air supply speed to low and run for the third preset time; The first preset duration includes the second preset duration and the third preset duration; The difference between the generated amount and the discharged amount is greater than the evaporated amount, and the control method includes: Return to the step of switching to heating mode and reducing the fan speed to run for the first preset time; In the cooling mode, the amount of condensate generated is less than the amount of wastewater discharged, and the control method includes: Maintain cooling mode and turn off refrigerant circulation; adjust the fan speed to maximum and run for the fourth preset duration. Switch to heating mode.

2. The control method for the reversible air supply air conditioner according to claim 1, characterized in that, The formula for calculating at least one of the generated amount and the evaporated amount is as follows: Q1=0.00085×Q2×(d1-d2); Wherein, Q2 is the airflow rate, obtained by adjusting the air supply speed and operating time; d1 is the moisture content of the supply air, obtained by adjusting the supply air temperature and humidity; and d2 is the moisture content of the return air, obtained by adjusting the return air temperature and humidity.

3. The control method for the reversible air supply air conditioner according to claim 1, characterized in that, The drainage volume is calculated based on the indoor unit's drainage rate and the operating time; and / or, The evaporation rate is a preset value.

4. The control method for a reversible air-supply air conditioner according to any one of claims 1-3, characterized in that, The switching to heating mode includes: Switch to heating mode and turn off the fan, run for the fifth preset time; Turn on the air supply and restore the air supply level of the heating mode.

5. The control method for a reversible air-supply air conditioner according to any one of claims 1-3, characterized in that, In heating mode, the indoor unit's air outlet is positioned downwards; In cooling mode, the airflow direction of the indoor unit is opposite to that in heating mode.

6. A reversible air supply air conditioner, characterized in that, The unit includes an indoor unit and a control module, the control module being used to execute the control method for the reversible air-conditioning unit according to any one of claims 1-5, wherein the indoor unit includes: The housing has a first air vent and a second air vent, the first air vent is downward facing, and the second air vent is located on the side wall of the housing; A heat exchanger is disposed within the casing; A fan is disposed inside the housing, and the fan has a first state and a second state; in cooling mode, the fan is in the first state and drives air to be blown out from the second air outlet; in heating mode, the fan is in the second state and drives air to be blown out from the first air outlet. A water receiving tray is disposed inside the casing and located below the heat exchanger; A first temperature sensor is disposed between the first air outlet and the heat exchanger; A second temperature sensor is disposed between the second air outlet and the heat exchanger; A first humidity sensor is disposed between the first air outlet and the heat exchanger; A second humidity sensor is provided, located between the second air outlet and the heat exchanger.

7. The reversible air supply air conditioner according to claim 6, characterized in that, The water receiving tray includes: The disc-shaped body has a water receiving cavity with an opening on one side and a drain outlet communicating with the water receiving cavity; inside the water receiving cavity, the disc-shaped body is provided with a protrusion to form a drain groove between the protrusion and the side wall of the water receiving cavity; the protrusion is used to support the heat exchanger. A water level sensor is also provided, which is located inside the water receiving cavity.

8. The reversible air supply air conditioner according to claim 7, characterized in that, The protrusion extends along the length of the disc-shaped body, and the drain outlet is spaced apart from the protrusion along the length of the disc-shaped body. Between the protrusion and the drain outlet, the disc-shaped body is provided with a filter hole that communicates with the water receiving chamber; the water receiving tray includes a cover that is detachably connected to the filter hole.

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