CN115875732A - Air conditioner and refrigerant abnormity monitoring method - Google Patents

Abstract

The invention discloses an air conditioner and a refrigerant abnormity monitoring method, wherein a body and an exhaust port of a compressor of the air conditioner are respectively provided with a temperature sensor, the body temperature and the exhaust temperature monitored by the temperature sensors are subjected to difference processing in a system monitoring mode to obtain a temperature difference value, and when the temperature difference value meets a preset early warning condition, the air conditioner is controlled to stop so as to stop the compressor and a fan, so that the compressor is effectively protected, meanwhile, a refrigerant abnormity early warning signal is sent out, and a user is reminded to overhaul the air conditioner.

Description

Air conditioner and refrigerant abnormity monitoring method

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner and a refrigerant abnormity monitoring method.

Background

With the improvement of living standard of people, air conditioners are widely used for adjusting the temperature of living environment of people. In the air conditioner, most of the heat generated by the work done by the compressor body is carried to the condenser by the flow of the refrigerant and is transferred to the environment through the condenser, so as to achieve the purpose of heat dissipation. When the air conditioner has refrigerant abnormal conditions such as refrigerant leakage or high-low pressure valve body leakage opening, the refrigerant flow is reduced or even no refrigerant flows, so that heat generated by the operation of the compressor cannot be brought out, the conventional compressor protection mechanism cannot effectively protect the compressor, the compressor is easily damaged, and therefore the air conditioner needs to be stopped in time when the refrigerant is abnormal and informs a user of overhauling.

Disclosure of Invention

The embodiment of the invention aims to provide an air conditioner and a refrigerant abnormity monitoring method, which can monitor the temperature difference value between the body temperature and the exhaust temperature of a compressor when the air conditioner stably runs so as to control the air conditioner to stop and send out a refrigerant abnormity early warning signal when the temperature difference value meets the early warning condition, thereby realizing effective protection of the compressor and timely reminding a user of overhauling the air conditioner.

To achieve the above object, an embodiment of the present invention provides an air conditioner, including:

a compressor for compressing a low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas;

the exhaust temperature sensor is arranged on an exhaust port of the compressor and used for detecting exhaust temperature;

the body temperature sensor is arranged on the body of the compressor and used for detecting the body temperature;

a controller configured to:

entering a system monitoring mode;

when the system monitoring mode is adopted, the body temperature and the exhaust temperature are obtained, so that the temperature difference between the body temperature and the exhaust temperature is calculated;

and when the temperature difference value meets the preset early warning condition, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

As an improvement of the above, the controller is further configured to:

when the temperature difference value is larger than a preset low-temperature threshold value and smaller than or equal to a preset high-temperature threshold value, setting the current system monitoring mode as a first monitoring mode;

under the first monitoring mode, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

and when the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first preset time, and the temperature difference value is gradually increased, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

As an improvement of the above, the controller is further configured to:

and in the system monitoring mode, when the temperature difference value is greater than a preset high-temperature threshold value, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

As an improvement of the above, the controller is further configured to:

entering a system monitoring mode after the air conditioner is started and runs for a preset running time;

when the temperature difference value is smaller than or equal to a preset low-temperature threshold value, setting the current system monitoring mode as a second monitoring mode;

in the second monitoring mode, acquiring the body temperature and the exhaust temperature at a preset second reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

when the temperature difference value is less than a preset low-temperature threshold value for a second preset time and all the body temperatures are less than or equal to a preset body temperature threshold value, exiting the system monitoring mode and re-entering the system monitoring mode after a preset interval duration; wherein the second reading frequency is less than the first reading frequency.

As an improvement of the above, the controller is further configured to:

and sending the refrigerant early warning signal to a pre-matched client or a cloud server to inform a user of timely overhauling the air conditioner.

As an improvement of the above scheme, the first reading frequency is once per minute, the second reading frequency is once per three minutes, the first preset number of times is ten times, and the second preset number of times is five times.

As an improvement of the above scheme, the preset body temperature threshold is one hundred twenty degrees centigrade, the preset high temperature threshold is fifteen degrees centigrade, and the preset low temperature threshold is eight degrees centigrade.

In order to achieve the above object, an embodiment of the present invention further provides a refrigerant abnormality monitoring method, including:

entering a system monitoring mode;

when the system is in a system monitoring mode, acquiring the body temperature and the exhaust temperature of a compressor so as to calculate the temperature difference between the body temperature and the exhaust temperature;

and when the temperature difference value meets the preset early warning condition, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

As an improvement of the above scheme, the method further comprises the following steps:

when the temperature difference value is larger than a preset low-temperature threshold value and smaller than or equal to a preset high-temperature threshold value, setting the current system monitoring mode as a first monitoring mode;

under the first monitoring mode, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

and when the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first preset time, and the temperature difference value is gradually increased, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

As an improvement of the above scheme, the method further comprises the following steps:

and in the system monitoring mode, when the temperature difference value is greater than a preset high-temperature threshold value, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

Compared with the prior art, the air conditioner and the refrigerant abnormity monitoring method disclosed by the embodiment of the invention have the advantages that the temperature sensors are arranged at the body of the compressor and the exhaust port of the compressor to detect the body temperature and the exhaust temperature, the body temperature and the exhaust temperature monitored by the temperature sensors are subjected to difference processing in a system monitoring mode to obtain a temperature difference value, and when the temperature difference value meets the preset early warning condition, the air conditioner is controlled to stop the compressor and the fan, so that the compressor is effectively protected, meanwhile, a refrigerant abnormity early warning signal is sent out, and a user is reminded to overhaul the air conditioner.

Drawings

Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a refrigeration system of an air conditioner according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a refrigeration system provided by an embodiment of the present invention;

FIG. 4 is a first flowchart of a controller provided by an embodiment of the present invention;

FIG. 5 is a second flowchart of the operation of the controller provided by the embodiment of the invention;

FIG. 6 is a third flowchart of the operation of the controller provided by the embodiment of the present invention;

FIG. 7 is a fourth flowchart illustrating operation of the controller according to the present invention;

fig. 8 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an early warning system provided in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an early warning system provided in an embodiment of the present invention;

fig. 11 is a schematic flow chart of a refrigerant abnormality monitoring method according to an embodiment of the present invention.

100, an indoor unit; 200. an outdoor unit; 300. a controller; 10. a compressor; 11. an exhaust gas temperature sensor; 12. a body temperature sensor; 20. a condenser; 30. a pressure reducer; 40. an evaporator; 1. an air conditioner; 2. a client; 3. a router; 4. a cloud server; 5. a buzzer; 6. and an indicator light.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, an air conditioner according to an embodiment of the present invention includes an indoor unit 100 and an outdoor unit 200, wherein the indoor unit 100 is used for adjusting the temperature and humidity of indoor air, the outdoor unit 200 is connected to the indoor unit 100 through a connecting pipe, the outdoor unit 200 is installed outdoors, and the indoor unit 100 is installed indoors.

The air conditioner is provided with a refrigerant loop, and particularly, the refrigerant loop circulates refrigerant through a compressor, a condenser, a pressure reducer and an evaporator in sequence; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger.

The heat exchange principle in the refrigerant loop is as follows:

referring to a configuration diagram of a refrigeration system of an air conditioner shown in fig. 2, the refrigeration system includes a compressor 10, a condenser 20, a pressure reducer 30, and an evaporator 40, forms a refrigerant circuit, a refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to air that has been conditioned and heat-exchanged, the compressor 10 compresses refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas, the discharged refrigerant gas flows into the condenser 20, the condenser 20 condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The decompressor 30 expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser 20 into a low-pressure liquid-phase refrigerant. The evaporator 40 evaporates the refrigerant expanded in the decompressor, and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 10. The evaporator 40 may achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant.

The air conditioner can adjust the temperature of the indoor space throughout the cycle. The outdoor unit 200 of the air conditioner refers to a portion of a refrigeration cycle including the compressor 10 and an outdoor heat exchanger, the indoor unit 100 of the air conditioner includes an indoor heat exchanger, and the decompressor 30 may be provided in the indoor unit 100 or the outdoor unit 200. The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner is a heater for heating when the indoor heat exchanger is used as a condenser, and a cooler for cooling when the indoor heat exchanger is used as an evaporator.

It should be noted that the air conditioner according to the embodiment of the present invention is not limited to the above-mentioned specific split type air conditioner, but may also be an integrated type air conditioner, such as a window type air conditioner, and the specific type of the air conditioner is not limited herein.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a refrigeration system according to an embodiment of the present invention, the air conditioner further includes an exhaust temperature sensor 11 and a body temperature sensor 12, the exhaust temperature sensor 11 is disposed at an exhaust port of the compressor and is used for detecting an exhaust temperature of the compressor, and the body temperature sensor 12 is disposed on a body of the compressor, such as a top or a side top of the compressor, and is used for detecting a body temperature of the compressor.

Specifically, the temperature sensors are sensors capable of sensing temperature and converting the sensed temperature into a usable output signal, and can be classified into two types, namely contact type and non-contact type according to the measuring mode, and classified into two types, namely a thermal resistor and a thermocouple according to the characteristics of sensor materials and electronic components, and manufacturers can select specific types of temperature sensors to be used as the exhaust temperature sensor 11 and the body temperature sensor 12 according to actual application requirements.

Specifically, the air conditioner further includes a controller, which in an embodiment of the present invention is configured to: entering a system monitoring mode; when the system monitoring mode is adopted, the body temperature and the exhaust temperature are obtained, so that the temperature difference between the body temperature and the exhaust temperature is calculated; and when the temperature difference value meets the preset early warning condition, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

Exemplarily, referring to fig. 4, fig. 4 is a first work flow chart of a controller provided in the embodiment of the present invention, where the controller is configured to execute steps S11 to S15:

s11, entering a system monitoring mode, and then entering a step S12.

S12, the body temperature and the discharge temperature of the compressor 10 are acquired, and then the process proceeds to step S13.

S13, subtracting the exhaust temperature from the body temperature to obtain a temperature difference value, and then entering step S14.

And S14, judging whether the temperature difference value meets a preset early warning condition, if so, entering step S15, and if not, entering other control logics, such as steps S22-S24 or steps S32-S36 described later.

Specifically, the early warning condition is set in advance by a manufacturer, and a suitable condition can be deduced through a large number of experiments.

And S15, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

Specifically, most of heat generated by the body (motor, pump body) of the compressor 10 is carried to the condenser 20 by means of refrigerant flow, and is transmitted to the environment through the condenser 20, so as to achieve the purpose of heat dissipation, when a system has a refrigerant leakage, a high-low pressure valve body is opened in a leakage manner, or the compressor 10 is locked, and the like, the refrigerant flow is little or even no refrigerant flows, the heat of the compressor 10 cannot be effectively carried out to the condenser 20, which may cause the body temperature of the compressor 10 to increase, at this time, the compressor 10 exhausts less gas, the temperature of the exhaust position is not high, which may cause the compressor 10 to be unable to be effectively protected in the current exhaust protection mode (inverter compressor 10) or the compressor 10 protector (fixed frequency compressor 10), and the inverter air conditioner is applied in a large scale, the inverter compressor 10 is easy to demagnetized in a high temperature environment due to its special material, which may cause the compressor 10 to be unable to be normally used, therefore, the embodiment of the present invention timely controls the air conditioner to stop the compressor 10, timely stop the operation of the compressor 10, and protect the compressor 10 and issue an early warning signal for reminding a user of an abnormal condition of the compressor to communicate with an abnormal refrigerant flow.

Specifically, in a preferred embodiment, the controller is further configured to: when the temperature difference value is larger than a preset low-temperature threshold value and smaller than or equal to a preset high-temperature threshold value, setting the current system monitoring mode as a first monitoring mode; under the first monitoring mode, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature; and when the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first preset time, and the temperature difference value is gradually increased, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

Exemplarily, referring to fig. 5, fig. 5 is a second flowchart of the controller according to the embodiment of the present invention, where the controller is configured to execute steps S16 to S22:

and S16, acquiring the body temperature and the exhaust temperature of the compressor 10 in a system monitoring mode, and then entering the step S17.

S17, subtracting the exhaust temperature from the body temperature to obtain a temperature difference value, and then entering step S18.

And S18, judging whether the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value, if so, entering a step S19, otherwise, entering other control logics, and if not, continuing to step S27 to step S36.

And S19, setting the current system monitoring mode as a first monitoring mode, and then entering the step S20.

S20, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature, and then entering the step S21.

S21, judging whether the temperature difference value is continuously greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first preset time, if so, entering a step S22, otherwise, entering other control logics, and if not, continuing to perform the steps S23-S26 or S27-S36.

And S22, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

Specifically, the system monitoring mode includes a first monitoring mode, and the early warning condition corresponding to the first monitoring mode is: the temperature difference is continuously larger than the preset low-temperature threshold and smaller than the preset high-temperature threshold, and the temperature difference is gradually increased.

As an example, assume that the first reading frequency is once per minute, the preset low temperature threshold is eight degrees celsius, the preset high temperature threshold is fifteen degrees celsius, and the temperature difference is Δ t. In a first monitoring mode, namely when 8 ℃ is less than delta T and less than or equal to 15 ℃, the system does not operate, but the temperature ty of the compressor 10 body and the exhaust temperature tp at the same time are grabbed 1 times every 1 minute, and the delta T (recorded as delta T1, delta T2, delta T3, delta T4, delta T5, 8230; delta T9, delta T10) at each time is recorded, the grabbing is continuously carried out for 10 minutes, so that delta T1 is not greater than delta T2-delta T1, delta T2 is not greater than delta T3-delta T2, delta T3 is not greater than delta T4-delta T3, delta T4 is not greater than 8230; 823030after 10 minutes, if 8 ℃ is less than delta T and less than or equal to 15 ℃, and 9 times of delta T is greater than 0 ℃, the system is judged to start to be abnormal, the compressor 10 stops operating, and the indoor fan and the outdoor fan also stops operating in a shutdown mode, and gives a fault and gives a prompt through warning.

Specifically, in a preferred embodiment, the controller is further configured to: and in the system monitoring mode, when the temperature difference value is greater than a preset high-temperature threshold value, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

Exemplarily, referring to fig. 6, fig. 6 is a third flowchart of the operation of the controller according to the embodiment of the present invention, where the controller is configured to execute steps S23 to S26:

s23, under the system monitoring mode, acquiring the body temperature and the exhaust temperature of the compressor 10, and then entering the step S24.

And S24, subtracting the exhaust temperature from the body temperature to obtain a temperature difference value, and then entering the step S25.

And S25, judging whether the temperature difference value is larger than a preset high-temperature threshold value, if so, entering the step S26, otherwise, entering other control logics, such as the steps S16 to S22, or the subsequent steps S27 to S36.

Specifically, in this embodiment, the warning condition is: the temperature difference is greater than a preset height threshold.

And S26, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

For example, in a system monitoring mode (which may be the first monitoring mode, or another monitoring mode, and is not limited herein), the body temperature and the exhaust temperature of the compressor 10 are obtained, and a temperature difference Δ t is calculated, when Δ t > 15 ℃, it is indicated that the temperature difference is too large at this time, the compressor 10 is controlled to stop operating, and the indoor fan and the outdoor fan also stop operating after operating in the shutdown mode, and a fault prompt is issued.

Specifically, the test shows that if the refrigerant leakage is about 20%, the difference between the body temperature and the exhaust temperature of the compressor 10 is about 8-15 ℃; if the refrigerant leakage is about 30%, the difference between the body temperature and the discharge temperature of the compressor 10 is about 15 ℃.

Specifically, in a preferred embodiment, the controller is further configured to: entering a system monitoring mode after the air conditioner is started and runs for a preset running time; when the temperature difference value is less than or equal to a preset low-temperature threshold value, setting the current system monitoring mode as a second monitoring mode; in the second monitoring mode, acquiring the body temperature and the exhaust temperature at a preset second reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature; when the temperature difference value is less than a preset low-temperature threshold value for a second preset time and all the body temperatures are less than or equal to a preset body temperature threshold value, exiting the system monitoring mode and re-entering the system monitoring mode after a preset interval duration; wherein the second reading frequency is less than the first reading frequency.

Exemplarily, referring to fig. 7, fig. 7 is a fourth operation flowchart of a controller according to an embodiment of the present invention, where the controller is configured to execute steps S27 to S36:

s27, under the system monitoring mode, the body temperature and the exhaust temperature of the compressor 10 are acquired, and then the process goes to the step S28.

S28, subtracting the exhaust temperature from the body temperature to obtain a temperature difference value, and then entering step S29.

S29, judging whether the temperature difference value is smaller than or equal to a preset low-temperature threshold value, if so, entering step S30, otherwise, entering other control logics, such as steps S16-S22, or steps S23-S26.

And S30, setting the current system monitoring mode as a second monitoring mode, and then entering the step S31.

S31, acquiring the body temperature and the exhaust temperature at a preset second reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature, and then entering step S32.

And S32, judging whether the temperature difference value is less than or equal to a preset low-temperature threshold value for a second preset time continuously, and all the body temperatures in the same time period are less than or equal to the preset body temperature threshold value, if so, entering the step S33, otherwise, entering other control logics, such as the steps S16-S22, or the steps S23-S26.

S33, the system monitoring mode exits, and then the process goes to step S34.

And S34, acquiring the actual interval duration from the latest exit of the system monitoring mode, and then entering the step S35.

And S35, judging whether the actual interval duration reaches the preset interval duration, if so, entering the step S36, otherwise, returning to the step S34.

And S36, entering a system monitoring mode.

Specifically, the system monitoring mode includes a second monitoring mode in which the second reading frequency is smaller than the first monitoring mode in the first monitoring mode.

Specifically, in this embodiment, when the temperature difference between the body temperature of the compressor 10 and the discharge temperature is small, it is described that the air conditioner is operating normally, in order to save system computing resources, temperature reading is performed at a relatively small frequency, and meanwhile, under the condition that the temperature differences obtained by continuous several times of monitoring and calculation are small and the body temperature of the compressor 10 is not too high, it is determined that the air conditioner is not in a refrigerant abnormal condition in a short time, the air conditioner exits from the system monitoring mode, saves system computing resources and storage resources, and enters into the system monitoring mode again after exiting for a period of time, and monitoring is performed again.

For example, assume that the second read frequency is once every three minutes, the preset low temperature threshold is eight degrees celsius, the preset bulk temperature threshold is one hundred twenty degrees celsius, and the temperature difference is Δ t. And in the second monitoring mode, namely when the delta t is less than or equal to 8 ℃, the system does not act, the body temperature ty and the exhaust temperature tp of the compressor 10 at the same moment are captured after the whole system operates for 3 minutes, if the delta t is less than or equal to 8 ℃, the system does not act, the delta t is less than or equal to 8 ℃ and the ty is less than or equal to 120 ℃ continuously for 5 times, the system is judged to be in normal operation, the protection mechanism is withdrawn, and the system monitoring mode is entered after 2 hours.

Specifically, in a preferred embodiment, the controller is further configured to: and sending the refrigerant early warning signal to a pre-matched client or a cloud server to inform a user of timely overhauling the air conditioner.

Exemplarily, referring to fig. 8, fig. 8 is a schematic structural diagram of a communication system according to an embodiment of the present invention, where the communication system mainly includes an air conditioner 1, a client 2, a router 3, and a cloud server 4, and the air conditioner 1 establishes a data connection with the client 2 through the router 3 or the cloud server 4. When the air conditioner 1 and the client 2 communicate through the router 3, the air conditioner 1 and the client 2 are close to each other, and a user can view the operation condition of placing the air conditioner in a living room or a room. When the air conditioner 1 and the client 2 communicate through the cloud server 4, the air conditioner 1 and the client 2 are far away, a user can perform data interaction with the air conditioner 1 through an APP installed in the client 2, and meanwhile, remote control of the air conditioner 1 can be achieved.

Further, referring to fig. 9 and 10, fig. 9 and 10 are schematic structural diagrams of the warning system, the air conditioner is further provided with at least one of a buzzer 5 or an indicator lamp 6, and is electrically connected to the controller 300, and the refrigerant abnormality warning signal is sent out by means of sounding the buzzer 5, or by means of setting a color or a display mode (such as a flashing or normally-on display mode) of the indicator lamp 6. A manufacturer can configure various early warning modes for the air conditioner, and a user selects the early warning mode according with the preference of the user through a wire controller or a remote controller.

In particular, in a preferred embodiment, the first reading frequency is once per minute, the second reading frequency is once per three minutes, the first preset number of times is ten times, and the second preset number of times is five times.

Specifically, in a preferred embodiment, the preset body temperature threshold is one hundred twenty degrees celsius, the preset high temperature threshold is fifteen degrees celsius, and the preset low temperature threshold is eight degrees celsius.

It should be noted that specific values of the first reading frequency, the second reading frequency, the first preset number of times, the second preset number of times, the preset body temperature threshold, the preset high temperature threshold, and the preset low temperature threshold are obtained by summarizing actual test tests, different air conditioner values may be different, and a manufacturer sets the specific values according to actual conditions.

Compared with the prior art, the air conditioner disclosed by the embodiment of the invention has the advantages that the temperature sensors are arranged at the body of the compressor 10 and the exhaust port of the compressor 10 to detect the body temperature and the exhaust temperature, the body temperature and the exhaust temperature which are monitored by the temperature sensors are subjected to difference processing in a system monitoring mode to obtain a temperature difference value, and when the temperature difference value meets the preset early warning condition, the air conditioner is controlled to stop the compressor 10 and the fan, so that the compressor 10 is effectively protected, meanwhile, a refrigerant abnormity early warning signal is sent out, and a user is reminded of overhauling the air conditioner.

Referring to fig. 11, fig. 11 is a schematic flow chart of a refrigerant abnormality monitoring method according to an embodiment of the present invention, where the refrigerant abnormality monitoring method according to the embodiment of the present invention is implemented by a controller in the air conditioner, an exhaust temperature sensor for detecting an exhaust temperature is disposed at an exhaust port of a compressor of the air conditioner, and a body temperature sensor for detecting a body temperature of the compressor is disposed on a body of the compressor. The refrigerant abnormality monitoring method includes steps S1 to S3:

s1, entering a system monitoring mode;

s2, when the system is in a system monitoring mode, acquiring the body temperature and the exhaust temperature of the compressor to calculate the temperature difference between the body temperature and the exhaust temperature;

and S3, when the temperature difference value meets a preset early warning condition, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

Specifically, in a preferred embodiment, the method further comprises:

when the temperature difference value is larger than a preset low-temperature threshold value and smaller than or equal to a preset high-temperature threshold value, setting the current system monitoring mode as a first monitoring mode;

under the first monitoring mode, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

and when the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first preset time, and the temperature difference value is gradually increased, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

Specifically, in a preferred embodiment, the method further comprises:

and in the system monitoring mode, when the temperature difference value is greater than a preset high-temperature threshold value, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

Specifically, in a preferred embodiment, the method further comprises:

entering a system monitoring mode after the air conditioner is started and runs for a preset running time;

when the temperature difference value is smaller than or equal to a preset low-temperature threshold value, setting the current system monitoring mode as a second monitoring mode;

in the second monitoring mode, acquiring the body temperature and the exhaust temperature at a preset second reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

when the temperature difference value is less than a preset low-temperature threshold value for a second preset time and all the body temperatures are less than or equal to a preset body temperature threshold value, exiting the system monitoring mode and re-entering the system monitoring mode after a preset interval duration; wherein the second reading frequency is less than the first reading frequency.

Specifically, in a preferred embodiment, the method further comprises: and sending the refrigerant early warning signal to a client or a cloud server matched in advance to inform a user of timely overhauling the air conditioner.

In particular, in a preferred embodiment, the first reading frequency is once per minute, the second reading frequency is once per three minutes, the first preset number of times is ten times, and the second preset number of times is five times.

Specifically, in a preferred embodiment, the preset body temperature threshold is one hundred twenty degrees celsius, the preset high temperature threshold is fifteen degrees celsius, and the preset low temperature threshold is eight degrees celsius.

It should be noted that, the specific steps of the method described in the above embodiment may refer to the working process of the air conditioner in the above embodiment, which is not described herein again.

Compared with the prior art, the refrigerant abnormity monitoring method disclosed by the embodiment of the invention has the advantages that the temperature difference between the body temperature and the exhaust temperature monitored by the temperature sensor is processed in the system monitoring mode by utilizing the temperature sensor arranged on the body of the compressor and the exhaust port of the compressor, so as to obtain the temperature difference, and when the temperature difference meets the preset early warning condition, the air conditioner is controlled to stop the compressor and the fan, so that the compressor is effectively protected, meanwhile, the refrigerant abnormity early warning signal is sent, and a user is reminded to overhaul the air conditioner.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. An air conditioner, comprising:

a compressor for compressing a low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas;

the exhaust temperature sensor is arranged on an exhaust port of the compressor and used for detecting the exhaust temperature;

the body temperature sensor is arranged on the body of the compressor and used for detecting the temperature of the body;

a controller configured to:

entering a system monitoring mode;

when the system monitoring mode is adopted, the body temperature and the exhaust temperature are obtained, so that the temperature difference between the body temperature and the exhaust temperature is calculated;

and when the temperature difference value meets the preset early warning condition, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

2. The air conditioner of claim 1, wherein the controller is further configured to:

when the temperature difference value is larger than a preset low-temperature threshold value and smaller than or equal to a preset high-temperature threshold value, setting the current system monitoring mode as a first monitoring mode;

under the first monitoring mode, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

and when the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first continuous preset time, and the temperature difference value is gradually increased, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

3. The air conditioner according to claim 1 or 2, wherein the controller is further configured to:

and in the system monitoring mode, when the temperature difference value is greater than a preset high-temperature threshold value, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

4. The air conditioner of claim 1, 2 or 3, wherein the controller is further configured to:

when the air conditioner is started and runs for a preset running time, entering a system monitoring mode;

when the temperature difference value is smaller than or equal to a preset low-temperature threshold value, setting the current system monitoring mode as a second monitoring mode;

in the second monitoring mode, acquiring the body temperature and the exhaust temperature at a preset second reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

when the temperature difference value is less than a preset low-temperature threshold value for a second preset time and all the body temperatures are less than or equal to a preset body temperature threshold value, exiting the system monitoring mode and re-entering the system monitoring mode after a preset interval duration; wherein the second reading frequency is less than the first reading frequency.

5. The air conditioner of claim 4, wherein the controller is further configured to:

and sending the refrigerant early warning signal to a pre-matched client or a cloud server to inform a user of timely overhauling the air conditioner.

6. The air conditioner according to claim 4, wherein said first reading frequency is once per minute, said second reading frequency is once per three minutes, said first predetermined number of times is ten times, and said second predetermined number of times is five times.

7. The air conditioner of claim 4, wherein the predetermined body temperature threshold is one hundred twenty degrees Celsius, the predetermined high temperature threshold is fifteen degrees Celsius, and the predetermined low temperature threshold is eight degrees Celsius.

8. A refrigerant abnormality monitoring method, characterized by comprising:

entering a system monitoring mode;

when the system is in a system monitoring mode, acquiring the body temperature and the exhaust temperature of a compressor so as to calculate the temperature difference between the body temperature and the exhaust temperature;

and when the temperature difference value meets the preset early warning condition, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

9. The refrigerant abnormality monitoring method as set forth in claim 8, further comprising:

when the temperature difference value is larger than a preset low-temperature threshold value and smaller than or equal to a preset high-temperature threshold value, setting the current system monitoring mode as a first monitoring mode;

in the first monitoring mode, acquiring the body temperature and the exhaust temperature at a preset first reading frequency to calculate a temperature difference value between the body temperature and the corresponding exhaust temperature;

and when the temperature difference value is greater than a preset low-temperature threshold value and less than or equal to a preset high-temperature threshold value for a first preset time, and the temperature difference value is gradually increased, controlling the air conditioner to stop and sending a refrigerant abnormity early warning signal.

10. The refrigerant abnormality monitoring method according to claim 8 or 9, further comprising:

and in the system monitoring mode, when the temperature difference value is greater than a preset high-temperature threshold value, controlling the air conditioner to stop and sending out a refrigerant abnormity early warning signal.

Images