CN115654666A

CN115654666A - Control method and control device for preventing water blowing of air conditioner and air conditioner

Info

Publication number: CN115654666A
Application number: CN202211206860.1A
Authority: CN
Inventors: 李龙威; 姚光森; 常卫峰; 黄春; 肖旭东; 吉金浩; 鲍洋; 陈东
Original assignee: Ningbo Aux Electric Co Ltd
Current assignee: Ningbo Aux Electric Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-31
Anticipated expiration: 2042-09-30
Also published as: CN115654666B

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method and a control device for preventing water blowing of an air conditioner and the air conditioner. The control method for preventing the air conditioner from blowing water comprises the following steps: acquiring a water level height value of condensed water in a water receiving tray and a temperature difference value between an air return temperature and a set temperature; when the water level height value is larger than or equal to the low water level threshold and smaller than the high water level threshold, acquiring the water level rising speed, and controlling the action of the compressor according to the water level rising speed and the temperature difference value; when the water level height value is greater than or equal to the high water level threshold and smaller than the overrun threshold, controlling the compressor to act according to the temperature difference; when the water level height value is greater than or equal to the overrun threshold, determining that the water level is overrun, acquiring the duration of the water level height value which is greater than or equal to the overrun threshold, and controlling the action of the compressor according to the temperature difference value and the duration. The control method and the control device for preventing water blowing of the air conditioner and the air conditioner provided by the invention have the advantages that the water blowing problem is relieved or even eliminated under the condition of considering the comfort of a user.

Description

Control method and control device for preventing water blowing of air conditioner and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control method and a control device for preventing water blowing of an air conditioner and the air conditioner.

Background

The air conditioner is mainly used for adjusting the temperature and the humidity, and can regulate and control the temperature and the humidity of the environment so as to meet the requirements of people.

When the air conditioner operates in a refrigeration mode, a certain amount of condensed water is generated, and sometimes, the condensed water is not drained timely or the drainage capacity is difficult to adapt to the generation speed, so that the condensed water in the water pan is accumulated excessively, for example: when indoor humidity is too high, the production of comdenstion water can greatly increased, and the drainage ability of air conditioner itself is certain, can't discharge the comdenstion water in time fast, and at this moment, the comdenstion water in the water collector just easily leads to the water level too high because of depositing excessively, appears blowing the water phenomenon easily, because the bacterium can multiply in the air conditioner inside, the comdenstion water that blows off will destroy indoor sanitary environment, not only can cause the propagation of bacterium, also can influence user's experience and feel.

Disclosure of Invention

The invention aims to provide a control method and a control device for preventing water blowing of an air conditioner and the air conditioner, so as to solve the technical problem that the water blowing phenomenon is easy to occur in the air conditioner in the prior art.

The invention provides a control method for preventing water blowing of an air conditioner, which comprises the following steps:

acquiring a water level height value of condensed water in a water receiving tray and a temperature difference value between an air return temperature and a set temperature;

when the water level height value is greater than or equal to a low water level threshold and smaller than a high water level threshold, acquiring a water level rising speed, and controlling the action of a compressor according to the water level rising speed and the temperature difference;

when the water level height value is greater than or equal to a high water level threshold and smaller than an overrun threshold, controlling the compressor to act according to the temperature difference;

when the water level height value is larger than or equal to an overrun threshold value, determining that the water level is overrun, acquiring the duration of the water level height value larger than or equal to the overrun threshold value, and controlling the action of the compressor according to the temperature difference value and the duration.

Compared with the prior art, the invention has the beneficial effects that:

the control method for preventing the blowing water of the air conditioner can correspondingly adjust the frequency of the compressor when the water level in the water pan is at different interval heights, judge the rising speed of the water level when the water level height value of condensed water in the water pan is greater than or equal to a low water level threshold value and smaller than a high water level threshold value, and relatively properly reduce the frequency of the compressor in advance when the rising speed of the water level is too high (for example, when the frequency of the compressor needs to be improved originally, the current frequency of the compressor is adjusted to be kept) so as to reduce the risk of blowing water under the condition of considering the comfort of a user; when the water level height value of the condensed water in the water receiving tray is larger than or equal to the overrun threshold, the water level overrun duration is judged, and when the water level overrun duration is too long, the frequency of the compressor is relatively properly adjusted downwards (for example, when the frequency of the compressor needs to be increased originally, the current frequency of the compressor is adjusted to be kept), so that the water blowing problem can be relieved or even eliminated under the condition that the comfort of a user is considered, bacteria in the air conditioner are not easy to blow out, the indoor sanitary environment is protected, the propagation of the bacteria is reduced, and the experience of the user is ensured.

As one embodiment, the acquiring a water level rising speed and controlling a compressor operation according to the water level rising speed and the temperature difference value includes:

when the water level height value reaches a first measuring point height value, timing is started;

if the timing duration reaches a first time threshold, and the water level height value is smaller than the second measuring point height value, determining that the rising speed of the water level meets a preset condition: if the temperature difference is smaller than a first temperature threshold value, controlling the frequency of the compressor to be reduced by basic amplitude; if the temperature difference value is greater than or equal to the first temperature threshold value and smaller than a second temperature threshold value, controlling the frequency of the compressor to be kept unchanged; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to rise by a basic amplitude;

if the timing duration is less than or equal to the first duration threshold when the water level height value reaches the second measuring point height value, determining that the water level rising speed exceeds a preset condition; if the temperature difference is smaller than the first temperature threshold, controlling the frequency of the compressor to decrease once in an increasing amplitude after the water level rising speed is determined to exceed a preset condition; if the temperature difference is greater than or equal to the first temperature threshold and smaller than a second temperature threshold, controlling the frequency of the compressor to decrease once by a basic amplitude after the water level rising speed is determined to exceed a preset condition; and if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to be kept unchanged during the first action after the water level rising speed is determined to exceed the preset condition.

The height value of the first measuring point is smaller than the height value of the second measuring point, the first temperature threshold value is smaller than 0 ℃, the second temperature threshold value is larger than 0 ℃, and the order increasing amplitude is larger than the basic amplitude.

The water level control device has the advantages that when the water level height value is larger than or equal to the low water level threshold value and smaller than the high water level threshold value, water blowing is avoided to a great extent, and the comfort degree of a user is guaranteed.

As an implementation manner, when the water level height value is greater than or equal to a high water level threshold and less than an overrun threshold, the controlling the compressor action according to the temperature difference includes:

if the water level height value is greater than or equal to the high water level threshold and smaller than the overrun threshold, controlling the frequency of the compressor to be reduced in a basic amplitude under the condition that the temperature difference value is smaller than the first temperature threshold; controlling the frequency of the compressor to be kept unchanged under the condition that the temperature difference value is greater than or equal to the first temperature threshold value and smaller than the second temperature threshold value; and controlling the frequency of the compressor to increase by a basic amplitude under the condition that the temperature difference value is greater than or equal to the second temperature threshold value.

The intelligent water level control system has the beneficial effects that when the water level height value is greater than or equal to the high water level threshold value and is less than the overrun threshold value, the comfort level of a user is ensured.

As an implementation manner, the obtaining of the duration of the water level height value being greater than or equal to the overrun threshold value, and controlling the compressor to operate according to the temperature difference value and the duration further includes:

when the duration is less than or equal to a second duration threshold, if the temperature difference is less than the first temperature threshold, controlling the frequency of the compressor to decrease by a basic amplitude; if the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to be kept unchanged; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to rise by a basic amplitude;

when the duration exceeds a second duration threshold, if the temperature difference is smaller than the first temperature threshold, controlling the frequency of the compressor to decrease in an order-increasing amplitude; if the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to decrease by taking a basic amplitude as a descending amplitude; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to be kept unchanged; the increased order magnitude is greater than the base magnitude.

The water level control device has the advantages that when the height value of the water level is larger than or equal to the overrun threshold, the water blowing risk is reduced, and the comfort level of a user is guaranteed.

As an implementable embodiment, the method further comprises:

and when the water level height value is larger than or equal to the overrun threshold value, if the wind speed of the indoor unit fan is larger than a preset wind speed, controlling the wind speed of the indoor unit fan to drop by a preset amplitude.

The air-blowing water-saving air conditioner has the beneficial effects that the air speed near the water collecting tray is reduced by properly reducing the air speed, and the water blowing problem is relieved or even eliminated, so that bacteria in the air conditioner are not easy to blow out.

As an implementation manner, after the step of controlling the wind speed of the indoor unit fan to decrease by a preset amplitude, the method further includes:

and when the duration exceeds a third duration threshold, if the wind speed of the indoor unit fan is still greater than the preset wind speed, controlling the wind speed of the indoor unit fan to be reduced to the preset wind speed.

The water-saving type water-collecting tray has the beneficial effects that the air flow speed near the water-collecting tray is reduced to a lower speed, and the water blowing problem is avoided as much as possible.

As an embodiment, the method further comprises:

if the water level height value is smaller than the overrun threshold value when the starting instruction of the air conditioner is obtained, controlling a fan of an indoor unit to operate according to a set wind speed;

and/or if the water level height value is greater than or equal to the overrun threshold value when an air conditioner starting instruction is obtained, controlling the indoor unit fan to keep a standby state for a first preset time, then operating at the preset wind speed for a second preset time, and then operating at the set wind speed.

The air conditioner has the beneficial effects that the water blowing risk during the starting of the air conditioner can be reduced.

As an implementable embodiment, the method further comprises:

if the water level height value is smaller than the low water level threshold value when an air conditioner starting instruction is obtained, controlling a drainage pump to be started when the water level height value rises above the low water level threshold value; when the water level height value is reduced to be smaller than the low water level threshold value, controlling the drainage pump to be closed, wherein the drainage pump is used for pumping and draining the condensed water in the water receiving tray;

and/or if the water level height value is greater than or equal to the low water level threshold value when an air conditioner starting instruction is obtained, controlling the drainage pump to be turned on for a preset time and then turned off, and then controlling the drainage pump to be turned on when the water level height value rises above the low water level threshold value; and controlling the drainage pump to be closed when the water level height value is reduced to be smaller than the low water level threshold value.

The drainage pump has the beneficial effects that when the accumulated condensed water in the water receiving tray is more, the condensed water can be smoothly drained by the drainage pump.

As an implementable embodiment, the method further comprises:

after an air conditioner starting instruction is obtained, the compressor is controlled to operate at a starting preset frequency until the compressor finishes starting the initial platform, and then the compressor is controlled to act according to the water level height value and the temperature difference value between the return air temperature and the set temperature.

The beneficial effect lies in, can guarantee the normal operating of air conditioner.

The controlling means that air conditioner anti-blow water that this embodiment provided includes:

the acquisition module is used for acquiring the water level height value of condensed water in the water receiving tray and the temperature difference between the return air temperature and the set temperature; the water level rising speed is obtained when the water level height value is greater than or equal to the low water level threshold and smaller than the high water level threshold; the water level height value is also used for acquiring the duration of the water level height value which is greater than or equal to the overrun threshold when the water level height value is greater than or equal to the overrun threshold;

the control module is used for controlling the action of the compressor according to the water level rising speed and the temperature difference value when the water level height value is greater than or equal to the low water level threshold value and smaller than the high water level threshold value; the temperature difference value is used for controlling the compressor to act when the water level height value is greater than or equal to the high water level threshold value and smaller than the overrun threshold value; and the control device is also used for determining that the water level is over-limit when the water level height value is more than or equal to the over-limit threshold value, and controlling the action of the compressor according to the temperature difference value and the water level over-limit time length.

The air conditioner provided by the invention comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the method.

The air conditioner water blowing prevention control device and the air conditioner have the same technical effects as the air conditioner water blowing prevention control method.

As an implementation mode, the air conditioner further comprises a first float switch, the first float switch is used for detecting the water level height value of condensed water in the water receiving tray, the first float switch comprises a reed switch, a magnetic reed switch is arranged in the reed switch, the magnetic reed switch is provided with at least two contacts which are arranged along the axial direction of the reed switch at intervals, any one contact can be closed to form a complete loop, and a resistor is arranged between any two contacts.

The detection device has the beneficial effects that the detection of the height values of two different water levels of the condensed water in the water pan can be realized.

As an implementation manner, the air conditioner further comprises a second float switch, the second float switch is used for detecting the water level height value of the condensed water in the water receiving tray, the second float switch is higher than the first float switch, and the second float switch is used for being triggered when the water level height value of the condensed water in the water receiving tray is greater than or equal to the overrun threshold value.

The detection method has the beneficial effects that whether the water level of the condensed water in the butt-joint water tray exceeds the limit can be detected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic flow chart of a control method for preventing blowing water of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a water level interval of a water pan in an air conditioner according to an embodiment of the present invention;

fig. 3 is a schematic partial structural diagram of an air conditioner according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural view of a float switch i in the air conditioner according to the embodiment of the present invention;

fig. 5 is a schematic diagram illustrating relative positions of a drain pump, a first float switch and a second float switch in an air conditioner according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a control device for preventing water blowing of an air conditioner according to an embodiment of the present invention.

Description of reference numerals:

201-a water pan; 202-a draining pump; 203-a float switch one; 204-a float switch two; 205-a float; 206-reed switch; 207-reed switch; 208-a ring magnet; 209-resistance;

301-an obtaining module; 302-control module.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Fig. 1 is a schematic flowchart of a method for controlling anti-blow-out of an air conditioner according to an embodiment of the present invention, where the method includes:

and S102, acquiring the water level height value of the condensed water in the water receiving tray and the temperature difference value between the return air temperature and the set temperature.

In particular, a float switch or other sensing element may be selected to sense the water level in the drip tray. The return air temperature Tin and the set temperature Tset can be detected respectively, and the difference between the return air temperature Tin and the set temperature Tset is calculated to obtain the required temperature difference value delta T; the return air temperature Tin and the set temperature Tset can be detected in real time, and the detection can be started when the water level height value is larger than or equal to the low water level threshold value.

And S104, when the water level height value is greater than or equal to the low water level threshold and smaller than the high water level threshold, acquiring the water level rising speed, and controlling the compressor to act according to the water level rising speed and the temperature difference.

When the water level height value is between the low water level threshold and the high water level threshold, if the water level rising speed is slow, the problem of water blowing generally cannot be caused, and the compressor can be normally controlled according to the temperature difference delta T so as to ensure the comfort of a user; and when the water level rising speed is too fast, the water drainage speed at present is shown to be incapable of meeting the condensate water generation speed, the probability of predicting the water blowing risk to be generated is higher, at the moment, the compressor can be adjusted and controlled in advance according to the temperature difference value delta T, for example, when the temperature difference value delta T is larger, the frequency of the compressor is required to be increased on the basis of the current compressor frequency under the normal condition, so that the purpose of quickly reducing the indoor side temperature is achieved, and the user comfort is ensured.

And S106, when the water level height value is greater than or equal to the high water level threshold and smaller than the overrun threshold, controlling the compressor to act according to the temperature difference.

When the water level height value is between the high water level threshold and the overrun threshold, the risk of water blowing is low, and at the moment, the compressor can be normally controlled according to the temperature difference delta T so as to ensure the comfort of users.

And S108, when the water level height value is larger than or equal to the overrun threshold, determining that the water level is overrun, acquiring the duration of the water level height value larger than or equal to the overrun threshold, and controlling the action of the compressor according to the temperature difference and the duration.

When the water level height value reaches above the over-limit threshold value, the water level is over-limit and the amount of condensed water is excessive, so that the risk of blowing water is high. At this moment, can be according to temperature difference DeltaT, carry out regulation control to the compressor, for example, when temperature difference DeltaT is great, need be on the basis of current compressor frequency under the normal condition, improve the frequency of compressor, thereby reach the effect of quick reduction indoor side temperature, but when the duration of water level transfinite is too long, need control the compressor and keep current frequency, avoid producing the speed too fast because of the comdenstion water as far as possible, and lead to the comdenstion water volume too big, thereby, when considering user's travelling comfort, can alleviate or even eliminate the problem of blowing water, so, the inside bacterium of air conditioner just is difficult to be blown out, be favorable to protecting indoor sanitary environment, reduce the propagation of bacterium, guarantee user's experience.

In the working process of the air conditioner, a temperature difference value Delta T is obtained at regular intervals (generally about 1 min), and the frequency of the compressor is controlled and adjusted according to the temperature difference value Delta T; the control method for preventing water blowing of the air conditioner provided by the embodiment is a frequency control method which is added with the judgment of the water level condition of the condensed water in the water receiving tray and adjusts the compressor when the probability of the risk of water blowing is higher or the risk of water blowing exists.

Referring to fig. 2, the water level in the water-receiving tray may be specifically divided into four sections, namely a first section E1, a second section E2, a third section E3 and a fourth section E4, and when the water level in the water-receiving tray is located in the first section E1, the water level height value is smaller than a low water level threshold value a; when the water level in the water pan is located in the second interval E2, the water level height value is greater than or equal to the low water level threshold value a and smaller than the high water level threshold value b; when the water level in the water pan is positioned in the third interval E3, the water level height value is greater than or equal to a high water level threshold value b and less than an overrun threshold value c; when the water level in the water pan is located in the fourth interval E4, the water level height value is larger than or equal to the overrun threshold value c.

In particular, the operating frequency of the compressor can be controlled and adjusted by a method involving a first temperature threshold of less than 0 ℃, preferably-1 ℃; the second temperature threshold is greater than 0 ℃, preferably 3 ℃; the step-up amplitude is larger than the basic amplitude, for example, the step-up frequency amplitude can be set to be twice of the basic amplitude, specifically, the basic amplitude can be set to be 1Hz, and correspondingly, the step-up amplitude can be set to be 2Hz, and the specific control method is as follows:

a1, if the water level height value of the condensed water in the water receiving tray is smaller than a low water level threshold value a (namely the water level in the water receiving tray is located in a first interval E1), the water volume of the condensed water in the water receiving tray is small, the problem of water blowing basically cannot occur, and at the moment, the frequency of the compressor can be normally controlled according to a temperature difference value delta T, and the method is as follows:

if the temperature difference value delta T is smaller than a first temperature threshold value, the temperature of the indoor environment is smaller than a set temperature at the moment, no refrigeration requirement exists, and under the condition, the frequency of the compressor is controlled to be reduced by basic amplitude so as to naturally recover the indoor comfort level; if the temperature difference delta T is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, the temperature of the indoor environment is close to the set temperature at the moment, the refrigeration requirement still exists, but the refrigeration requirement is smaller, and under the condition, the frequency of the compressor can be controlled to be kept unchanged to maintain the indoor comfort level and save energy; if the temperature difference value delta T is larger than or equal to the second temperature threshold value, the temperature of the indoor environment is higher at the moment, and the refrigerating requirement is higher.

And A2, if the water level height value of the condensed water in the water receiving tray is greater than or equal to the low water level threshold value a and smaller than the high water level threshold value b (namely the water level in the water receiving tray is positioned in the second interval E2), timing is started when the water level height value reaches the first measuring point height value.

A2.1, if the timing duration reaches the first time threshold, and the water level height is still smaller than the second measurement point height, it may be determined that the water level rising speed meets the preset condition, that is, the water level rising speed is slow, and the risk of blowing water is low, at this time, the frequency of the compressor may be normally controlled according to the temperature difference Δ T, specifically referring to the method for normally controlling the frequency of the compressor according to the temperature difference Δ T in B1, which is not described herein again. And the height value of the first measuring point is smaller than that of the second measuring point, and the first time length threshold value can be set to be 3min.

A2.2, if the timing duration is less than or equal to the first time duration threshold when the water level height reaches the second measuring point height, determining that the water level rising speed exceeds a preset condition, namely the water level rising speed is high, predicting that the probability of the impending water blowing risk is high, and meeting the adjustment condition of the frequency control method of the compressor, wherein the frequency control method of the compressor needs to be adjusted, and the adjusted control method is specifically as follows:

when the temperature difference delta T is smaller than a first temperature threshold, the frequency of the compressor can be controlled to decrease by a basic amplitude originally, but in order to decrease the water level increasing speed, the frequency of the compressor is controlled to decrease once by a larger increasing amplitude after the water level increasing speed is determined to exceed a preset condition; when the temperature difference value delta T is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, the frequency of the compressor can be controlled to be kept unchanged originally, but in order to reduce the water level rising speed, the frequency of the compressor is controlled to be reduced once by a basic amplitude after the water level rising speed is determined to exceed a preset condition; when the temperature difference is greater than or equal to the second temperature threshold, the frequency of the compressor needs to be controlled to rise at the basic frequency originally, but in order to slow down the rising speed of the water level and avoid water blowing as much as possible, the frequency of the compressor is not suitable to be increased, and the frequency of the compressor needs to be controlled to be kept unchanged during the first action after the rising speed of the water level exceeds the preset condition. After the compressor is controlled to operate once according to the adjusted method, the frequency of the compressor can be controlled and adjusted according to the normal control method, and of course, if the frequency of the compressor is adjusted next time and other adjustment conditions are met, the compressor is controlled to operate according to the corresponding adjusted method.

Referring to the table 1, a measuring point E1 and a measuring point E2 can be arranged in a second interval E2, the height of the measuring point E1 is smaller than that of the measuring point E2, the height value of the measuring point 1 is used as the first measuring point height value, the height value of the measuring point 2 is used as the second measuring point height value, whether the water level rising speed is too fast is determined by judging whether the time t1 for the water level in the water receiving tray from the measuring point E1 to the measuring point E2 is greater than 3min, and when t1 is greater than 3min, the water level rising speed can be determined to be too fast; and when t1 is less than or equal to 3min, the water level rising speed can be determined to be slow, so that the accumulation speed of the condensed water can be fed back, and the operation frequency F of the air conditioner compressor is controlled and adjusted in advance before the water level rises to the high water level.

TABLE 1 frequency response water level rise rate of compressor

In actual control, the return air temperature Tin and the set temperature Tset are acquired, and the difference Δ T = Tin-Tset between the return air temperature Tin and the set temperature Tset is calculated. When the time t1 for the water level in the water pan to reach the measuring point e2 from the measuring point e1 is less than or equal to 3min in the timing, the condensate water is rapidly increased, the drainage speed does not meet the current condensate water generation speed, and the risk of water blowing is caused. For example, when the temperature difference Δ T > 3 ℃, the frequency of the compressor needs to be increased based on the current compressor frequency under normal conditions, so as to achieve rapid reduction of the indoor temperature, but when the time T1 when the measuring point e1 reaches the measuring point e3 is less than 3min, the current frequency needs to be maintained, so as to avoid the risk of water blowing due to too fast generation of condensed water.

And A3, referring to the table 2, if the water level height value of the condensed water in the water pan is greater than or equal to the high water level threshold B and less than the overrun threshold c (namely, the water level in the water pan is located in the third interval E3), normally controlling the frequency of the compressor according to the temperature difference Delta T, and specifically referring to the method for normally controlling the frequency of the compressor according to the temperature difference Delta T in the step B1, so as to ensure the comfort level of a user, which is not repeated herein.

TABLE 2 air conditioning system anti-blow-off response action

And A4, if the water level height value is greater than or equal to the overrun threshold value c (namely the water level in the water receiving tray is located in the fourth interval E4), indicating that the water level of the condensed water in the water receiving tray is overrun, controlling the action of the compressor according to the duration of the overrun state of the water level, and specifically referring to the following table 3.

And A4.1, when the duration T2 that the water level height value is greater than or equal to the overrun threshold c is less than or equal to a second duration threshold, the accumulated condensed water in the water receiving tray is less at this moment, the risk of water blowing is low, the frequency of the compressor can be normally controlled according to the temperature difference delta T, and the method for normally controlling the frequency of the compressor according to the temperature difference delta T in the step B1 is specifically referred to, and is not repeated herein. Wherein the second duration threshold may be set to 3min.

A4.2, when the duration t2 that the water level height value is greater than or equal to the overrun threshold c exceeds the second duration threshold, indicating that a large amount of condensed water is accumulated in the water pan, the risk of water blowing is very high, the adjustment condition of the frequency control method of the compressor is met, the frequency control method of the compressor needs to be adjusted, and the adjusted control method specifically comprises the following steps:

when the temperature difference value delta T is smaller than a first temperature threshold value, the frequency of the compressor can be controlled to decrease by a basic amplitude originally, but in order to decrease the water level in the water receiving tray as soon as possible and relieve the water blowing problem, the frequency of the compressor is controlled to decrease by a large increasing amplitude until the height value of the water level decreases below an overrun threshold value or the temperature difference value delta T increases above the first temperature threshold value; when the temperature difference value delta T is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, the frequency of the compressor can be controlled to be kept unchanged originally, but in order to reduce the water level and relieve the water blowing problem, the frequency of the compressor is controlled to be reduced by a basic amplitude until the height value of the water level is reduced below an overrun threshold c, or the temperature difference value delta T is increased to be above the second temperature threshold or reduced to be below the first temperature threshold; when the temperature difference Δ T is greater than or equal to the second temperature threshold, the frequency of the compressor needs to be controlled to increase at the basic frequency originally, but in order to prevent the water level from further increasing and avoid the problem of heavy water blowing, the frequency of the compressor is not suitable to be increased, and the frequency of the compressor needs to be controlled to be kept unchanged until the height value of the water level is reduced below the threshold c or the temperature difference Δ T is increased above the first temperature threshold. When the height of the water level of the condensed water in the water receiving tray falls below the overrun threshold c, the frequency of the compressor is controlled and adjusted according to a control method corresponding to the height after the water level falls.

TABLE 3 Water blowing prevention response action of air conditioning system

In addition, the wind speed of the indoor unit fan can be controlled by the following method, specifically, see table 4:

b1, when water level height value more than or equal to transfinite threshold value c (be promptly the water level in the water collector is located first interval E4), if the wind speed of indoor set fan is greater than preset wind speed, then control the wind speed decline of indoor set fan and preset the range, thereby, through reducing the wind speed appropriately, the near air velocity of water collector has been reduced, alleviate or even eliminate and blow the water problem, so, the inside bacterium of air conditioner just is difficult for being blown out, be favorable to protecting indoor sanitary environment, reduce the propagation of bacterium, guarantee user's experience. Specifically, the preset range may be a wind speed value corresponding to a first-level wind gear, that is, when the water level is too high, the wind speed of the indoor unit fan may be controlled to decrease by one gear on the basis of the current wind gear, and if the wind speed of the indoor unit fan is currently below the preset wind speed, the problem of blowing water is substantially not caused, and the wind gear is not necessarily adjusted down, so the wind speed of the indoor unit fan is not adjusted down; the preset wind speed can be the lowest wind speed of the indoor unit fan.

Under the condition that the water level height value is larger than or equal to the over-limit threshold c, if the air speed of the indoor unit fan is reduced by a preset range, but the water level height value of the condensed water in the receiving tray is not reduced to be lower than the over-limit threshold c in time, the duration of the water level over-limit state exceeds a third duration threshold, when the duration of the water level over-limit state exceeds the third duration threshold, if the air speed of the indoor unit fan is larger than the preset air speed, the air speed of the indoor unit fan is controlled to be directly reduced to the preset air speed, so that the air speed near the water receiving tray is reduced to a lower speed, and the problem of water blowing is avoided as much as possible. Specifically, timing may be started after a signal that the water level height value is greater than or equal to the overrun threshold c is acquired, and when the timing duration is greater than or equal to the third duration threshold, if the air speed of the indoor unit fan is still greater than the preset air speed, the air speed of the indoor unit fan is controlled to decrease to the preset air speed; in the process, after the signal that the water level height value is smaller than the overrun threshold c is acquired, the timer is cleared. It should be noted that when the duration time that the water level of the condensed water in the water pan exceeds the third duration threshold, it indicates that a large amount of condensed water has accumulated in the water pan at this time, and the risk of blowing water is very high, so that if the air speed of the indoor unit fan has not dropped to the preset air speed, the air speed of the indoor unit fan can be directly controlled to drop to the preset air speed, water in the water pan is prevented from being blown out as much as possible, and the protection effect on the indoor environment is better. Wherein the third duration threshold may be set to 3min.

And B2, when the water level height value is below the overrun threshold value c (namely the water level in the water receiving tray is positioned in the first interval E1, E2 or E3), the water level is not overrun, and the problem of water blowing is not easy to occur, so that the air speed is not required to be reduced no matter how high the current air speed of the indoor unit fan is, and the indoor unit fan can directly run according to the air speed set by a user.

Referring to table 4, when the water level reaches the limit water level, it is indicated that the drainage speed of the drainage pump does not meet the current generation speed of the condensed water, so that the risk of water blowing exists, and at this time, a stage of reduction windshield needs to be immediately adjusted downwards (no action is performed when the wind is low), so that water in the water pan is prevented from being blown out; when the accumulated time t2 for limiting the water level is more than 3min, the water level indicates that a large amount of condensed water is accumulated in the water receiving tray, and the fan immediately reduces the air flow to low air to prevent the water in the water receiving tray from being blown out.

TABLE 4. Response action of air conditioning system for preventing water blowing

When the air conditioner starting instruction is obtained, the following method can be adopted to carry out starting control on the indoor unit fan:

and C1, if the water level height value is smaller than an overrun threshold value C when an air conditioner starting instruction is obtained, the water level of condensed water in a water receiving tray is not overrun, the risk of water blowing is low, an indoor unit fan can be controlled to operate according to a set air speed so as to meet the requirement of a user, and then the air speed of the indoor unit fan can be controlled according to the control method of the air speed of the indoor unit fan.

And C2, if a starting instruction of the air conditioner is obtained, if the water level height value is larger than or equal to an overrun threshold C, the water level of condensed water in the water receiving tray is overrun, a high water blowing risk exists, at the moment, an indoor unit fan needs to be controlled to be kept in a standby state firstly to prevent the fan from blowing out the condensed water, after the fan is standby for a first preset time, the water level of partial condensed water in the water receiving tray can be reduced to be below the overrun threshold C, at the moment, the fan is controlled to operate at a preset air speed for a second preset time to avoid the problem that the condensed water is blown out due to too high air speed as much as possible, then the fan is operated at the set air speed, and the air speed of the indoor unit fan is controlled according to the control method of the air speed of the indoor unit fan.

Specifically, when the air conditioner is started and the condensate water level is detected to be below the high water level, the fan operates according to a set windshield; when the condensate water level is detected to be above the high water level and below the limit water level after the air conditioner is started, immediately starting a drainage pump and starting timing, and controlling a fan normally; when the condensing water level is detected to be above the limit water level after the air conditioner is started, the fan is delayed for 30s to start to operate, then the low wind mode is operated for 1min, and then the normal control is carried out.

Fig. 3 is a partial schematic structural view of the air conditioner in the embodiment, as shown in fig. 2, a drain pump 202 is installed on a water pan 201, and can draw out condensed water in the water pan 201; specifically, when the water level in the water tray 201 reaches the low water level threshold value a or higher, the drain pump 202 starts to pump and drain the condensed water in the water tray 201.

When the air conditioner startup instruction is obtained, the following method can be adopted to perform startup control on the drainage pump 202:

d1, if the water level height value is smaller than the low water level threshold value a when the air conditioner starting instruction is obtained, the fact that the amount of condensed water in the water receiving tray 201 is small when the air conditioner is started is indicated, and drainage is not needed; subsequently, the drainage pump 202 can be controlled according to a conventional control method, and when the water level height value rises above the low water level threshold value a, the drainage pump 202 is controlled to be started; and controls the drainage pump 202 to be closed when the water level height value is reduced to be less than the low water level threshold value a.

D2, if the water level height value is larger than or equal to the low water level threshold a when the air conditioner starting instruction is obtained, indicating that the amount of condensed water in the water receiving tray 201 is large when the air conditioner is started, and drainage is needed, immediately controlling the drainage pump 202 to be started to pump the condensed water in the water receiving tray 201, closing the drainage pump 202 after the drainage pump 202 is started for a preset time, then controlling the drainage pump 202 according to a conventional control method, and controlling the drainage pump 202 to be started when the water level height value rises to be higher than the low water level threshold a; and controls the drainage pump 202 to be closed when the water level height value is reduced to be less than the low water level threshold value a.

When the air conditioner starting instruction is obtained, the following method can be adopted to control the starting of the compressor: after an air conditioner starting instruction is obtained, the compressor is controlled to operate at a starting preset frequency until the compressor finishes starting the initial platform so as to ensure normal operation of the air conditioner, and then the compressor is controlled to operate according to a water level height value and a temperature difference value delta T between a return air temperature Tin and a set temperature Tset, wherein the compressor control method can be specifically referred to. That is to say, the starting initial frequency F0 of the compressor is not affected by the water level of the condensed water, and after the starting initial platform of the compressor is finished, the compressor is controlled according to the compressor control method.

Fig. 6 is a schematic structural diagram of a control device for preventing water blowing of an air conditioner according to an embodiment of the present invention, where the device includes:

the acquisition module 301 is configured to acquire a water level height value of condensed water in the water pan and a temperature difference between an air return temperature and a set temperature; the water level rising speed is obtained when the water level height value is greater than or equal to the low water level threshold value and smaller than the high water level threshold value; the water level height value is also used for acquiring the duration of the water level height value which is greater than or equal to the overrun threshold when the water level height value is greater than or equal to the overrun threshold;

the control module 303 is configured to control the compressor to operate according to the water level rising speed and the temperature difference when the water level height value is greater than or equal to the low water level threshold and smaller than the high water level threshold; and is used for controlling the action of the compressor according to the temperature difference when the water level height value is greater than or equal to the high water level threshold and is less than the overrun threshold; and the control device is also used for determining that the water level is over-limit when the water level height value is greater than or equal to the over-limit threshold, and controlling the action of the compressor according to the temperature difference value and the time length of the water level over-limit.

The acquiring module 301 may specifically include a timing unit and a determining unit, where the timing unit is configured to start timing when the water level height reaches the first measuring point height. The determining unit is used for determining that the rising speed of the water level meets the preset condition when the timing duration reaches a first duration threshold and the water level height value is still smaller than a second measurement height value; and when the water level height value reaches the second measuring point height value and the timing duration is less than or equal to the first time duration threshold, determining that the water level rising speed exceeds the preset condition.

The control module 302 is configured to control the frequency of the compressor to decrease according to a basic amplitude when the temperature difference is smaller than a first temperature threshold on the premise that the determining unit determines that the water level rising speed satisfies the preset condition; when the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to keep unchanged; and when the temperature difference is greater than or equal to the second temperature threshold, controlling the frequency of the compressor to increase by a basic amplitude.

The control module 302 is configured to control the frequency of the compressor to decrease once with an increasing step amplitude after determining that the water level rising speed exceeds the preset condition when the temperature difference is smaller than the first temperature threshold; when the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to decrease once by the basic amplitude after the water level rising speed is determined to exceed the preset condition; and when the temperature difference is larger than or equal to the second temperature threshold value, controlling the frequency of the compressor to be kept unchanged in the first action after the water level rising speed is determined to exceed the preset condition.

The control module 302 is further configured to control the frequency of the compressor to decrease by a basic amplitude under a condition that the temperature difference is smaller than the first temperature threshold when the water level height is greater than or equal to the high water level threshold and smaller than the overrun threshold; controlling the frequency of the compressor to keep unchanged under the condition that the temperature difference value is greater than or equal to the first temperature threshold value and less than the second temperature threshold value; and controlling the frequency of the compressor to increase by the basic amplitude under the condition that the temperature difference value is greater than or equal to the second temperature threshold value.

The control module 302 is further configured to control the frequency of the compressor to decrease based on the basic amplitude when the temperature difference is smaller than the first temperature threshold under the condition that the duration is smaller than or equal to the second duration threshold; when the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to keep unchanged; and when the temperature difference is greater than or equal to the second temperature threshold value, controlling the frequency of the compressor to increase by the basic amplitude.

The control module 302 is further configured to control the frequency of the compressor to decrease in an increasing step amplitude when the temperature difference is smaller than the first temperature threshold under the condition that the duration exceeds the second duration threshold; when the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to decrease by taking the basic amplitude as a descending amplitude; and when the temperature difference is larger than or equal to the second temperature threshold value, controlling the frequency of the compressor to be kept unchanged.

The control module 302 is further configured to control the wind speed of the indoor unit fan to decrease by a preset range when the wind speed of the indoor unit fan is greater than a preset wind speed under the condition that the water level height value is greater than or equal to the overrun threshold.

The control module 302 is further configured to control the air speed of the indoor unit fan to decrease to the preset air speed when the duration exceeds the third duration threshold and the air speed of the indoor unit fan is still greater than the preset air speed.

The control module 302 is further configured to control the indoor unit fan to operate according to a set air speed when the air conditioner startup instruction is obtained and the water level height value is smaller than the overrun threshold; and when the starting instruction of the air conditioner is obtained, the indoor unit fan is controlled to be in a standby state for a first preset time period under the condition that the water level height value is greater than or equal to the overrun threshold value, the indoor unit fan is firstly operated for a second preset time period at the preset air speed, and then the indoor unit fan is operated according to the set air speed.

The control module 302 is further configured to control the drainage pump to be started when the water level height value rises above the low water level threshold value under the condition that the water level height value is smaller than the low water level threshold value when the air conditioner startup instruction is obtained; and controlling the drainage pump to be closed when the water level height value is reduced to be smaller than the low water level threshold value.

The control module 302 is further configured to control the drain pump to be turned on for a preset time period and then turned off under the condition that the water level height value obtained when the air conditioner startup instruction is obtained is greater than or equal to the low water level threshold value, and then control the drain pump to be turned on when the water level height value rises above the low water level threshold value; and controlling the drainage pump to be closed when the water level height value is reduced to be smaller than the low water level threshold value.

The embodiment also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and when the computer program is read and executed by the processor, the control method for preventing the air conditioner from blowing water is realized.

Referring to fig. 3 to 5, the air conditioner according to this embodiment further includes a float switch one 203, and the float switch one 203 is used for detecting a water level height value of condensed water in the water pan 201, wherein the float 205 is made of a material with a relatively low density, so that the float 205 can be changed with the change of the water level under the combined action of buoyancy and gravity, and thus the float switch one 203 can detect the water level in the water pan 201 and control the action of the drain pump 202, when the water level meets a certain height condition, a signal is sent to the drain pump 202 to turn on/off the drain pump 202, and specifically, after receiving the signal that the water level of the float switch one 203 reaches a certain height condition, the drain pump 202 turns on to drain the condensed water in the water pan 201; conversely, when the water level is too low, drain pump 202 is signaled to remain off in order to reduce power consumption.

Referring to fig. 3 and table 5, when the water level in the drip tray 201 is a low water level, the water level height value is less than the low water level threshold value a, that is, the water level in the drip tray 201 is located in the first interval E1, at this time, the float switch one 203 is not triggered, and thus, the drain pump 202 is not turned on; when the water level in the water receiving tray 201 is higher than the high water level, the water level height value is greater than or equal to the low water level threshold value a, that is, the water level in the water receiving tray 201 is located in the second interval E2, the third interval E3 or the fourth interval E4, at this time, the float switch one 203 is triggered, and the drain pump 202 can be started after the float switch one 203 is triggered to drain the water in the water receiving tray 201, so that the water level height value is determined to be greater than or equal to the low water level threshold value a through the trigger signal of the float switch one 203, and the water level in the water receiving tray 201 is higher than the high water level.

TABLE 5 water level height and draining pump action comparison table

Preferably, the first float switch 203 comprises a reed switch 206, a magnetic reed switch 207 is arranged in the reed switch 206, the magnetic reed switch 207 is provided with at least two contacts which are arranged at intervals along the axial direction of the reed switch 206, a complete loop can be formed when any one contact is closed, and a resistor 209 is arranged between any two contacts, so that the rising speed of the water level can be judged by detecting the duration time of currents in different stages in the first float switch 203, the frequency of a compressor is controlled in a front-mounted mode, the temperature of a refrigerant in a refrigeration system is changed, and the comfort level is improved.

The interior of the float 205 has an annular magnetic ring 208 as an external excitation input that affects the start and stop of a reed switch 207 inside the reed switch 206. For example, the reed switch 207 inside the reed pipe 206 may be set to be normally closed, and when the float 205 is in a low water level state, the reed switch 207 is in a fitting state under the action of its own elasticity; when the water level in the air conditioner rises, the floater 205 reaches a high water level position under the action of buoyancy, the magnetic reed switches 207 are disconnected and attached under the action of the annular magnet 208 in the floater 205, and the circuit is in a disconnected state, wherein the two magnetic reed switches 207 can form a complete loop after being attached, and the circuit is disconnected after the magnetic reed switches 207 are disconnected, so that the air conditioner drainage pump 202 is controlled to be started; of course, the reed switch 207 inside the reed switch 206 can be set to be normally open.

In addition, more than two reed switch 207 contacts can be arranged in an internal circuit of the first float switch 203, each contact is arranged and positioned at certain height intervals in the vertical direction within the height range of the second interval E2, each contact can form a complete circuit, but resistance values in closed circuits formed by different contacts are different, when the float 205 in the first float switch 203 is under the action of buoyancy and moves upwards in the vertical direction, the closed circuits in the first float switch 203 are not consistent, and the currents in different closed circuits are not consistent, so that the controller can judge the current water level height by detecting the current in the first float switch 203, if too much condensed water is accumulated, the frequency of the outdoor unit compressor is limited to increase or even reduce the current frequency, the temperature of the pipe in the system is increased, the formation of the condensed water is reduced, and the phenomenon of air conditioning water blowing is avoided from the source.

It should be noted that the first float switch 203 may restart timing each time when being triggered, that is, each time the water level drops to be less than the low water level threshold, the first float switch 203 is turned off and the timing is cleared, that is, t1 is a time length from the measuring point e1 to the measuring point e2 after the first float switch 203 is triggered this time.

The air conditioner provided in this embodiment may further include a second float switch 204, the second float switch 204 is used to detect the water level in the water tray 201, the second float switch 204 is set to be higher than the first float switch 203, the second float switch 204 may be used to detect whether the water level in the water tray 201 exceeds the limit, and when the water level in the water tray 201 does not exceed the limit, the water level height value is smaller than the limit-exceeding threshold value c, that is, the water level in the water tray 201 is located in the first interval E1, the second interval E2, or the third interval E3, and at this time, the second float switch 204 is not triggered; when the water level in the water pan 201 exceeds the limit, the water level height value is greater than or equal to the limit threshold value c, that is, the water level in the water pan 201 is located in the fourth interval E4, at this time, the float switch two 204 is triggered, and therefore, whether the current water level reaches the limit water level can be judged by detecting whether the float switch two 204 is triggered; on the basis, whether a large amount of sharply condensed water exists in the water pan 201 can be judged by the accumulated time t2 when the water level in the water pan 201 reaches the limit water level (i.e. the time when the float switch II 204 is continuously triggered), so that the operating frequency F of the compressor of the air conditioner and the air speed of the indoor unit can be controlled and adjusted after the water level exceeds the limit.

Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A control method for preventing water blowing of an air conditioner is characterized by comprising the following steps:

2. The method for controlling the blowing prevention of the air conditioner according to the claim 1, wherein the obtaining of the water level rising speed and the controlling of the compressor according to the water level rising speed and the temperature difference comprise:

if the water level height value is smaller than the second measuring point height value when the timing duration reaches the first time threshold, determining that the water level rising speed meets the preset condition; if the temperature difference is smaller than a first temperature threshold value, controlling the frequency of the compressor to be reduced by basic amplitude; if the temperature difference is greater than or equal to the first temperature threshold and smaller than a second temperature threshold, controlling the frequency of the compressor to be kept unchanged; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to rise by a basic amplitude;

if the timing duration is less than or equal to the first duration threshold when the water level height value reaches the second measuring point height value, determining that the water level rising speed exceeds a preset condition; if the temperature difference is smaller than the first temperature threshold, controlling the frequency of the compressor to decrease once in an increasing amplitude after the water level rising speed is determined to exceed a preset condition; if the temperature difference is greater than or equal to the first temperature threshold and smaller than a second temperature threshold, controlling the frequency of the compressor to decrease once by a basic amplitude after the water level rising speed is determined to exceed a preset condition; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to be kept unchanged during the first action after the water level rising speed is determined to exceed the preset condition;

the height value of the first measuring point is smaller than the height value of the second measuring point, the first temperature threshold value is smaller than 0 ℃, the second temperature threshold value is larger than 0 ℃, and the step increasing amplitude is larger than the basic amplitude.

3. The method for controlling the anti-blowing water of the air conditioner according to the claim 1, wherein when the water level height value is greater than or equal to a high water level threshold and less than an overrun threshold, the method for controlling the compressor to act according to the temperature difference comprises the following steps:

if the water level height value is greater than or equal to the high water level threshold and smaller than the overrun threshold, controlling the frequency of the compressor to be reduced in a basic amplitude under the condition that the temperature difference value is smaller than a first temperature threshold; controlling the frequency of the compressor to be kept unchanged under the condition that the temperature difference value is greater than or equal to the first temperature threshold value and smaller than a second temperature threshold value; controlling the frequency of the compressor to increase by a basic amplitude under the condition that the temperature difference value is greater than or equal to the second temperature threshold value;

wherein the first temperature threshold is less than 0 ℃ and the second temperature threshold is greater than 0 ℃.

4. The method for controlling blowing prevention of an air conditioner according to claim 1, wherein the obtaining of the duration time that the water level height value is greater than or equal to the overrun threshold value controls the compressor to operate according to the temperature difference value and the duration time, and further comprising:

when the duration is less than or equal to a second duration threshold, if the temperature difference is less than a first temperature threshold, controlling the frequency of the compressor to decrease by a basic amplitude; if the temperature difference is greater than or equal to the first temperature threshold and smaller than a second temperature threshold, controlling the frequency of the compressor to be kept unchanged; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to rise by a basic amplitude;

when the duration exceeds a second duration threshold, if the temperature difference is smaller than the first temperature threshold, controlling the frequency of the compressor to decrease in an order-increasing amplitude; if the temperature difference is greater than or equal to the first temperature threshold and smaller than the second temperature threshold, controlling the frequency of the compressor to be reduced by taking a basic amplitude as a descending amplitude; if the temperature difference is larger than or equal to the second temperature threshold, controlling the frequency of the compressor to be kept unchanged;

wherein the first temperature threshold is less than 0 ℃, the second temperature threshold is greater than 0 ℃, and the step-up amplitude is greater than the base amplitude.

5. The method for controlling the blowing prevention of the air conditioner according to claim 1, further comprising:

6. The method for controlling blowing prevention of an air conditioner according to claim 5, wherein after the step of controlling the wind speed of the indoor unit fan to decrease by a preset magnitude, the method further comprises:

7. The method for controlling the blowing prevention of the air conditioner according to claim 1, further comprising:

if the water level height value is smaller than the overrun threshold value when the air conditioner starting instruction is obtained, controlling the fan of the indoor unit to operate according to the set wind speed;

if the water level height value is larger than or equal to the overrun threshold value when the starting instruction of the air conditioner is acquired, controlling the indoor unit fan to keep a standby state for a first preset time, operating at the preset wind speed for a second preset time, and operating at the set wind speed.

8. The method for controlling the anti-blowing water of the air conditioner according to any one of claims 1 to 7, wherein the method further comprises:

if the water level height value is larger than or equal to the low water level threshold when an air conditioner starting instruction is obtained, controlling the drainage pump to be started for a preset time and then to be closed, and then controlling the drainage pump to be started when the water level height value rises to be higher than the low water level threshold; and controlling the drainage pump to be closed when the water level height value is reduced to be smaller than the low water level threshold value.

9. The utility model provides a controlling means that air conditioner anti-blowing water, its characterized in that includes:

the acquisition module is used for acquiring the water level height value of condensed water in the water receiving tray and the temperature difference between the return air temperature and the set temperature; the water level rising speed is obtained when the water level height value is greater than or equal to the low water level threshold value and smaller than the high water level threshold value; the water level height value is also used for acquiring the duration of the water level height value which is greater than or equal to the overrun threshold when the water level height value is greater than or equal to the overrun threshold;

the control module is used for controlling the action of the compressor according to the water level rising speed and the temperature difference value when the water level height value is greater than or equal to the low water level threshold value and smaller than the high water level threshold value; and the compressor is controlled to act according to the temperature difference when the water level height value is greater than or equal to the high water level threshold and smaller than the overrun threshold; and the control device is also used for determining that the water level is over-limit when the water level height value is greater than or equal to the over-limit threshold, and controlling the compressor to act according to the temperature difference value and the water level over-limit time length.

10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program when read and executed by the processor implementing the method of any one of claims 1-8.

11. The air conditioner of claim 10, further comprising a first float switch for detecting a level of condensed water in the water receiving tray, wherein the first float switch comprises a reed pipe, a magnetic reed switch is arranged in the reed pipe, the magnetic reed switch comprises at least two contacts arranged at intervals along an axial direction of the reed pipe, any one of the contacts can form a complete loop when closed, and a resistor is arranged between any two of the contacts.

12. The air conditioner as claimed in claim 11, further comprising a second float switch, wherein the second float switch is configured to detect a water level height of the condensed water in the water receiving tray, and the second float switch is higher than the first float switch, and the second float switch is configured to be triggered when the water level height of the condensed water in the water receiving tray is greater than or equal to the overrun threshold.