Automatic supplementing method and system for air conditioner snow seeds

Abstract

The method comprises the following steps that after an air conditioner is started to operate for the first time, the temperature difference between a thick copper pipe and a thin copper pipe in an air conditioner outdoor unit is obtained, and whether the temperature difference is larger than a temperature threshold value or not is judged; if the temperature is smaller than or equal to the temperature threshold value, the current pressure of the refrigerant is obtained and marked as first pressure; turning off the air conditioner, turning on the regulating valve for a second time, turning off the regulating valve, and enabling the additional storage tank to input quantitative Q snow seeds into the snow seed storage cavity; the air conditioner is started again, after the air conditioner is started to run for first time, the current refrigerant pressure is obtained and marked as second pressure, and whether the second pressure is larger than the first pressure or not is judged; and if yes, sending an undetermined signal to the maintainer and the user, and if not, sending a first signal to the maintainer and the user. Maintenance personnel are informed of the reason of insufficient snow in advance, and the maintenance personnel can judge whether maintenance tools need to be carried or not according to the reason of the insufficient snow.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning regulation, in particular to an automatic replenishment method for air conditioning refrigerant. Background Art

[0002] Refrigerant, commonly known as refrigerant, is a working fluid used to transfer heat energy and produce a refrigeration effect in refrigeration and air conditioning systems. It is an essential material for air conditioning refrigeration. When the air conditioner is not in use, the refrigerant will be continuously consumed. When the refrigerant is consumed to a certain extent, the cooling effect of the air conditioner will be significantly attenuated, seriously affecting the user experience.

[0003] Normally, users will only go for testing when they feel that the cooling effect is not good. At this time, professional maintenance personnel are needed to come for testing to determine whether there is a problem of insufficient refrigerant. There are two situations where insufficient refrigerant occurs. One is insufficient refrigerant due to self-consumption, and the second is insufficient refrigerant due to pipeline leakage. Maintenance personnel need to detect the problem before they can perform the corresponding repairs. For the second situation, since professional tools need to be brought during maintenance, and maintenance personnel do not know in advance what situation causes insufficient refrigerant, they generally do not bring tools. When the second situation is detected, the maintenance personnel need to go back and bring tools, which will extend the maintenance time and affect the user experience of the air conditioner. Summary of the invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to propose an automatic refrigerant replenishment method and system for air conditioners, so as to quickly find out the cause of insufficient refrigerant, speed up the maintenance process of the air conditioner, and avoid maintenance personnel carrying tools back and forth, thus delaying the maintenance time.

[0005] To achieve this object, the present invention adopts the following technical solutions: an automatic refilling method for air conditioning refrigerant, wherein a refrigerant storage chamber is detachably connected to an additional storage tank through a pipe, and a regulating valve is arranged in the pipe;

[0006] The method comprises the following steps:

[0007] Step S1: After the air conditioner is turned on for the first time, the temperature difference between the thick copper tube and the thin copper tube in the air conditioner outdoor unit is obtained, and it is determined whether the temperature difference is greater than a temperature threshold;

[0008] If it is less than or equal to the temperature threshold, the current refrigerant pressure is obtained and marked as the first pressure;

[0009] Step S2: turning off the air conditioner, and after opening the regulating valve for a second time, closing the regulating valve to allow the additional storage tank to input a fixed amount of refrigerant Q into the refrigerant storage chamber;

[0010] Step S3: restarting the air conditioner, and after starting to run for the first time, obtaining the current refrigerant pressure, marking it as the second pressure, and determining whether the second pressure is greater than the first pressure;

[0011] If it is greater, a pending signal is sent to the maintenance personnel and the user; if it is not greater, a first signal is sent to the maintenance personnel and the user.

[0012] Preferably, when the second pressure is greater than the first pressure, the following operations are also performed:

[0013] After the air conditioner has been running for the third time, the current refrigerant pressure is obtained and marked as the third pressure.

[0014] The pressure difference between the third pressure and the second pressure is obtained, and the pressure change value is obtained according to the pressure difference and the second time, and it is determined whether the pressure change value is greater than the first set value. If it is greater, the pending signal is modified to the first signal; if not, the pending signal is modified to the second signal.

[0015] Preferably, after the pending signal is modified to the first signal, the following operations need to be performed:

[0016] The gaseous refrigerant loss rate is obtained according to the pressure difference, the third time and the current temperature;

[0017] Determine whether the gaseous refrigerant loss rate is greater than a second set value. If it is greater than the second set value, obtain the liquid refrigerant loss rate based on the relationship between the gaseous refrigerant loss rate and the density of the refrigerant, and adjust the opening and closing width and adjustment time of the regulating valve based on the liquid refrigerant loss rate.

[0018] Preferably, the formula for obtaining the gaseous refrigerant loss rate is as follows:

[0019]

[0020] Where n is the amount of refrigerant gas, R is the ideal gas constant of the refrigerant, T is the current temperature, ΔP1 is the pressure difference, and t is the third time.

[0021] Preferably, the steps of adjusting the opening and closing width and the adjustment time of the regulating valve based on the liquid refrigerant loss rate are as follows:

[0022] Obtain the current air pressure in the additional storage tank as the fourth air pressure;

[0023] The time for the fixed quantity Q to be completely consumed is calculated according to the liquid refrigerant loss rate as the fourth time, and the fourth time plus the preset time is used as the adjustment time;

[0024] When the adjustment time arrives, the air pressure in the refrigerant storage chamber is obtained as the fifth air pressure, and the pressure between the fifth air pressure and the fourth air pressure is obtained as the pressure difference;

[0025] The opening and closing width of the throttle valve is calculated based on the pressure difference, the quantitative Q and the opening and closing length of the throttle valve;

[0026] The calculation formula of the opening and closing width is as follows:

[0027]

[0028] Where Q is the quantity of refrigerant, ω is the constant coefficient, λ is the empirical coefficient, μ is the dynamic viscosity of the liquid, ΔP2 is the pressure difference, l is the opening and closing length, and t2 is the second time.

[0029] An automatic refrigerant replenishment system for air conditioners, using the automatic refrigerant replenishment method for air conditioners, comprising a refrigerant storage chamber detachably connected to an additional storage tank via a pipe, and a regulating valve is arranged in the pipe;

[0030] It includes a first pressure acquisition module, an input module and a notification module;

[0031] The first pressure acquisition module is used to obtain the temperature difference between the thick copper tube and the thin copper tube in the air conditioner outdoor unit after the air conditioner is turned on for a first time, and determine whether the temperature difference is greater than a temperature threshold;

[0032] If it is less than or equal to the temperature threshold, the current refrigerant pressure is obtained and marked as the first pressure;

[0033] The input module is used to turn off the air conditioner, and after opening the regulating valve for a second time, close the regulating valve to allow the additional storage tank to input a fixed amount of Q refrigerant into the refrigerant storage chamber;

[0034] The notification module is used to restart the air conditioner, and after starting and running for a first time, obtain the current refrigerant pressure, mark it as a second pressure, and determine whether the second pressure is greater than the first pressure;

[0035] If it is greater, a pending signal is sent to the maintenance personnel; if it is not greater, a first signal is sent to the maintenance personnel.

[0036] Preferably, the notification module further includes a re-test submodule;

[0037] The re-detection submodule is used to obtain the current refrigerant pressure after the air conditioner runs for a third time, marked as the third pressure.

[0038] The pressure difference between the third pressure and the second pressure is obtained, and the pressure change value is obtained according to the pressure difference and the second time, and it is determined whether the pressure change value is greater than the first set value. If it is greater, the pending signal is modified to the first signal; if not, the pending signal is modified to the second signal.

[0039] Preferably, it also includes a stabilization module;

[0040] The stabilization module is used to determine whether the pressure change value is 0. If it is 0, no operation is performed. If it is not 0, the gaseous refrigerant loss rate is obtained according to the pressure difference, the third time and the current temperature; the liquid refrigerant loss rate is obtained according to the relationship between the gaseous refrigerant loss rate and the density of the refrigerant, and the opening and closing width and adjustment time of the regulating valve are adjusted based on the liquid refrigerant loss rate.

[0041] Preferably, the stabilization module includes a fourth air pressure acquisition unit, an adjustment time acquisition unit, and an opening and closing width adjustment unit;

[0042] The fourth air pressure obtaining unit is used to obtain the air pressure in the current additional storage tank as the fourth air pressure;

[0043] The adjustment time acquisition unit is used to calculate the time when the air pressure in the refrigerant storage chamber reaches a fourth air pressure according to the gaseous refrigerant loss rate as the fourth time, and the fourth time plus the preset time as the adjustment time;

[0044] The opening and closing width adjustment unit is used to obtain the air pressure in the refrigerant storage chamber as the fifth air pressure when the adjustment time arrives, and obtain the pressure between the fifth air pressure and the fourth air pressure as the pressure difference;

[0045] The opening and closing width of the throttle valve is calculated based on the pressure difference, the quantitative Q and the opening and closing length of the throttle valve.

[0046] One of the above technical solutions has the following advantages or beneficial effects: the present invention can quickly determine whether the refrigerant is insufficient through the temperature difference between the thick copper tube and the thin copper tube, and then determine the cause through different air pressures, so as to speed up the discovery of the cause of insufficient refrigerant, thereby informing the maintenance personnel of the cause of insufficient refrigerant in advance. The maintenance personnel can judge whether they need to carry maintenance tools based on the cause of insufficient refrigerant, thereby ultimately speeding up the maintenance process of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a flow chart of an embodiment of the method of the present invention.

[0048] Figure 2 It is a schematic diagram of the structure of an embodiment of the system of the present invention. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] like Figures 1-2 As shown, a method for automatically replenishing refrigerant for air conditioning, the refrigerant storage chamber is detachably connected to an additional storage tank through a pipe, and a regulating valve is arranged in the pipe;

[0053] The method comprises the following steps:

[0054] Step S1: After the air conditioner is turned on for the first time, the temperature difference between the thick copper tube and the thin copper tube in the air conditioner outdoor unit is obtained, and it is determined whether the temperature difference is greater than a temperature threshold;

[0055] If it is less than or equal to the temperature threshold, the current refrigerant pressure is obtained and marked as the first pressure;

[0056] Step S2: turning off the air conditioner, and after opening the regulating valve for a second time, closing the regulating valve to allow the additional storage tank to input a fixed amount of refrigerant Q into the refrigerant storage chamber;

[0057] Step S3: restarting the air conditioner, and after starting to run for the first time, obtaining the current refrigerant pressure, marking it as the second pressure, and determining whether the second pressure is greater than the first pressure;

[0058] If it is greater, a pending signal is sent to the maintenance personnel and the user; if it is not greater, a first signal is sent to the maintenance personnel and the user.

[0059] In the present invention, a pipeline is connected to the existing refrigerant storage chamber, and an additional storage tank is provided at the end of the pipeline. After opening the regulating valve, the refrigerant in the additional storage tank can flow into the refrigerant storage chamber by gravity for replenishment. Before this, step S1 needs to be performed. In the present invention, temperature sensors are respectively provided in the thick copper tube and the thin copper tube of the air conditioner outdoor unit, which are used to obtain the temperature of the thick copper tube and the thin copper tube respectively. When the refrigerant is insufficient, the temperature of the thick copper tube and the thin copper tube will be close to the same. Therefore, whether the refrigerant is insufficient is judged by whether the temperature difference is greater than the temperature threshold. Although this method can detect whether the refrigerant is insufficient. However, the reason for the insufficient refrigerant cannot be determined. Therefore, when the insufficient refrigerant is detected, a fixed amount of Q refrigerant will be input into the refrigerant storage chamber, and then the air conditioner will be restarted. When it runs again to the first time, the pressure of the refrigerant is obtained again and marked as the second pressure. Since the second pressure is the pressure detected after the refrigerant is added, the gas generated will be more, so the second pressure is greater than the first pressure, but in the case of serious leakage in the pipeline, the values ​​of the first pressure and the second pressure will be consistent. Therefore, when the second pressure is not greater than the first pressure, a first signal needs to be sent to the maintenance personnel. The first signal is to inform the maintenance personnel that the reason for the insufficient refrigerant is the pipeline leakage. After obtaining the first signal, the maintenance personnel can bring professional maintenance tools to the user's home for maintenance. During the maintenance, the refrigerant in the additional storage tank needs to be replenished. Of course, in order to better notify, the first signal will also be sent to the user.

[0060] When there is a slight leak in the pipeline, the second pressure will still be greater than the first pressure in a short period of time. Therefore, it is impossible to determine the reason for the lack of refrigerant at this time, so a pending signal is sent to the maintenance personnel and the user. Since the refrigerant has been replenished in small quantities at this time, the air conditioner will still work, and further judgment can be made after a period of time. Determine the reason for the lack of refrigerant.

[0061] The present invention can quickly determine whether the refrigerant is insufficient through the temperature difference between the thick copper tube and the thin copper tube, and then determine the cause through different air pressures, so as to quickly find out the cause of the insufficient refrigerant, thereby informing the maintenance personnel of the cause of the insufficient refrigerant in advance. The maintenance personnel can determine whether they need to carry maintenance tools based on the cause of the insufficient refrigerant, thereby finally speeding up the maintenance process of the air conditioner.

[0062] Preferably, when the second pressure is greater than the first pressure, the following operations are also performed:

[0063] After the air conditioner has been running for the third time, the current refrigerant pressure is obtained and marked as the third pressure.

[0064] The pressure difference between the third pressure and the second pressure is obtained, and the pressure change value is obtained according to the pressure difference and the second time, and it is determined whether the pressure change value is greater than the first set value. If it is greater, the pending signal is modified to the first signal; if not, the pending signal is modified to the second signal.

[0065] The third time is greater than the first time and the second time, and the third time is 4 to 5 hours after the air conditioner is turned on. If there is a slight leak in the pipeline, there will be a change between the third pressure and the second pressure. Therefore, when the pressure change value is greater than the first set value, it can be determined that the refrigerant is insufficient due to a slight leak in the pipeline. At this time, the pending signal can be modified to the first signal. After the maintenance personnel know the first signal, they can carry maintenance tools to the user's location for maintenance. If the pressure change value is not greater than the first set value, the reason for the insufficient refrigerant is simply the consumption of refrigerant. The maintenance personnel only need to carry the refrigerant and its adding tools to the user to replenish it. This speeds up the maintenance process of the air conditioner.

[0066] Preferably, after the pending signal is modified to the first signal, the following operations need to be performed:

[0067] The gaseous refrigerant loss rate is obtained according to the pressure difference, the third time and the current temperature;

[0068] Determine whether the gaseous refrigerant loss rate is greater than a second set value. If it is greater than the second set value, obtain the liquid refrigerant loss rate based on the relationship between the gaseous refrigerant loss rate and the density of the refrigerant, and adjust the opening and closing width and adjustment time of the regulating valve based on the liquid refrigerant loss rate.

[0069] Since it is a slight leak from the pipeline at this time, the maintenance personnel may not be able to reach the user in time to repair the pipeline. The user's air conditioner still needs to perform refrigeration work. If the refrigerant is not replenished within a period of time, the air conditioner will not be able to continue refrigeration. Therefore, in the present invention, this situation needs to be taken into account. When the gaseous refrigerant loss rate is greater than the second set value, it means that the refrigerant will leak more refrigerants after a period of time, resulting in a reduction in the refrigeration effect, thereby affecting the user experience. For this reason, in the present invention, the additional storage tank stores liquid refrigerants. The liquid refrigerant loss rate is obtained based on the gaseous refrigerant loss rate and the density relationship of the refrigerant. The liquid refrigerant loss rate can be used to determine how much liquid refrigerant is consumed, and when the given fixed amount Q of refrigerant will be consumed, the adjustment time is calculated. After the adjustment time is reached, the opening and closing width of the regulating valve is adjusted so that after the second time, the fixed amount Q of refrigerant can be delivered to the refrigerant storage chamber. In this way, the continuous refrigeration of the air conditioner is ensured in a short time until the maintenance personnel come to repair the pipeline or interface.

[0070] Preferably, the formula for obtaining the gaseous refrigerant loss rate is as follows:

[0071]

[0072] Where n is the amount of refrigerant gas, R is the ideal gas constant of the refrigerant, T is the current temperature, ΔP1 is the pressure difference, and t is the third time.

[0073] Preferably, the steps of adjusting the opening and closing width and the adjustment time of the regulating valve based on the liquid refrigerant loss rate are as follows:

[0074] Obtain the current air pressure in the additional storage tank as the fourth air pressure;

[0075] The time for the quantitative Q to be completely consumed is calculated based on the liquid refrigerant loss rate as the fourth time, and the fourth time plus the preset time is used as the adjustment time; since the liquid refrigerant loss rate is obtained by the instantaneous gaseous refrigerant loss rate in the present invention, and the speed of gas leakage in the pipeline is related to the magnitude of the pressure, the leakage amount of the gaseous refrigerant in the pipeline is nonlinear. The time for the quantitative Q to be completely consumed is calculated by the liquid refrigerant loss rate as the fourth time, which is a linear theoretical value. For the sake of safety, the fourth time plus the preset time is used as the adjustment time in the invention to ensure that the amount of refrigerant leakage in the pipeline is sufficient, thereby reducing the gas pressure in the refrigerant storage chamber. Since liquid refrigerant has a certain viscosity, if the refrigerant storage chamber is too strong, the quantitative Q of refrigerant cannot be added into the refrigerant storage chamber within the second time.

[0076] When the adjustment time arrives, the air pressure in the refrigerant storage chamber is obtained as the fifth air pressure, and the pressure between the fifth air pressure and the fourth air pressure is obtained as the pressure difference;

[0077] The opening and closing width of the throttle valve is calculated based on the pressure difference, the quantitative Q and the opening and closing length of the throttle valve;

[0078] The calculation formula of the opening and closing width is as follows:

[0079]

[0080] Where Q is the quantity of refrigerant, ω is the constant coefficient, λ is the empirical coefficient, μ is the dynamic viscosity of the liquid, ΔP2 is the pressure difference, l is the opening and closing length, and t2 is the second time.

[0081] In one embodiment of the present invention, the regulating valve is a regulating valve with a rectangular opening, and the overall outlet opening degree of the regulating valve can be adjusted by adjusting the opening and closing width.

[0082] In another embodiment, if the regulating valve has a circular opening, then l can be modified to π, and then the square root can be taken to obtain the opening and closing radius.

[0083] An automatic refrigerant replenishment system for air conditioners, using the automatic refrigerant replenishment method for air conditioners, comprising a refrigerant storage chamber detachably connected to an additional storage tank via a pipe, and a regulating valve is arranged in the pipe;

[0084] It includes a first pressure acquisition module, an input module and a notification module;

[0085] The first pressure acquisition module is used to obtain the temperature difference between the thick copper tube and the thin copper tube in the air conditioner outdoor unit after the air conditioner is turned on for a first time, and determine whether the temperature difference is greater than a temperature threshold;

[0086] If it is less than or equal to the temperature threshold, the current refrigerant pressure is obtained and marked as the first pressure;

[0087] The input module is used to turn off the air conditioner, and after opening the regulating valve for a second time, close the regulating valve to allow the additional storage tank to input a fixed amount of Q refrigerant into the refrigerant storage chamber;

[0088] The notification module is used to restart the air conditioner, and after starting and running for a first time, obtain the current refrigerant pressure, mark it as a second pressure, and determine whether the second pressure is greater than the first pressure;

[0089] If it is greater, a pending signal is sent to the maintenance personnel; if it is not greater, a first signal is sent to the maintenance personnel.

[0090] Preferably, the notification module further includes a re-test submodule;

[0091] The re-detection submodule is used to obtain the current refrigerant pressure after the air conditioner runs for a third time, marked as the third pressure.

[0092] The pressure difference between the third pressure and the second pressure is obtained, and the pressure change value is obtained according to the pressure difference and the second time, and it is determined whether the pressure change value is greater than the first set value. If it is greater, the pending signal is modified to the first signal; if not, the pending signal is modified to the second signal.

[0093] Preferably, it also includes a stabilization module;

[0094] The stabilization module is used to determine whether the pressure change value is 0. If it is 0, no operation is performed. If it is not 0, the gaseous refrigerant loss rate is obtained according to the pressure difference, the third time and the current temperature; the liquid refrigerant loss rate is obtained according to the relationship between the gaseous refrigerant loss rate and the density of the refrigerant, and the opening and closing width and adjustment time of the regulating valve are adjusted based on the liquid refrigerant loss rate.

[0095] Preferably, the stabilization module includes a fourth air pressure acquisition unit, an adjustment time acquisition unit, and an opening and closing width adjustment unit;

[0096] The fourth air pressure obtaining unit is used to obtain the air pressure in the current additional storage tank as the fourth air pressure;

[0097] The adjustment time acquisition unit is used to calculate the time when the air pressure in the refrigerant storage chamber reaches a fourth air pressure according to the gaseous refrigerant loss rate as the fourth time, and the fourth time plus the preset time as the adjustment time;

[0098] The opening and closing width adjustment unit is used to obtain the air pressure in the refrigerant storage chamber as the fifth air pressure when the adjustment time arrives, and obtain the pressure between the fifth air pressure and the fourth air pressure as the pressure difference;

[0099] The opening and closing width of the throttle valve is calculated based on the pressure difference, the quantitative Q and the opening and closing length of the throttle valve.

[0100] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0101] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for automatically replenishing refrigerant for air conditioning, characterized in that: The refrigerant storage chamber is detachably connected to the additional storage tank via a pipe, and a regulating valve is arranged in the pipe; The method comprises the following steps: Step S1: After the air conditioner is turned on for the first time, the temperature difference between the thick copper tube and the thin copper tube in the air conditioner outdoor unit is obtained, and it is determined whether the temperature difference is greater than a temperature threshold; If it is less than or equal to the temperature threshold, the current refrigerant pressure is obtained and marked as the first pressure; Step S2: turning off the air conditioner, and after opening the regulating valve for a second time, closing the regulating valve to allow the additional storage tank to input a fixed amount of refrigerant Q into the refrigerant storage chamber; Step S3: restarting the air conditioner, and after starting to run for the first time, obtaining the current refrigerant pressure, marking it as the second pressure, and determining whether the second pressure is greater than the first pressure; If it is greater, a pending signal is sent to the maintenance personnel and the user; if it is not greater, a first signal is sent to the maintenance personnel and the user.

2. The automatic refrigerant replenishment method for air conditioning according to claim 1, characterized in that: When the second pressure is greater than the first pressure, the following operations are required: After the air conditioner has been running for the third time, the current refrigerant pressure is obtained and marked as the third pressure. The pressure difference between the third pressure and the second pressure is obtained, and the pressure change value is obtained according to the pressure difference and the second time, and it is determined whether the pressure change value is greater than the first set value. If it is greater, the pending signal is modified to the first signal; if not, the pending signal is modified to the second signal.

3. The automatic refrigerant replenishment method for air conditioning according to claim 2, characterized in that: After changing the pending signal to the first signal, you need to perform the following operations: The gaseous refrigerant loss rate is obtained according to the pressure difference, the third time and the current temperature; Determine whether the gaseous refrigerant loss rate is greater than a second set value. If it is greater than the second set value, obtain the liquid refrigerant loss rate based on the relationship between the gaseous refrigerant loss rate and the density of the refrigerant, and adjust the opening and closing width and adjustment time of the regulating valve based on the liquid refrigerant loss rate.

4. The automatic refrigerant replenishment method for air conditioning according to claim 3, characterized in that: The formula for obtaining the gaseous refrigerant loss rate is as follows: Wherein n is the amount of refrigerant gas, R is the ideal gas constant of the refrigerant, T is the current temperature, ΔP1 is the pressure difference, and t is the third time.

5. The automatic refrigerant replenishment method for air conditioning according to claim 3, characterized in that: The steps of adjusting the opening and closing width and the adjustment time of the regulating valve based on the liquid refrigerant loss rate are as follows: Obtain the current air pressure in the additional storage tank as the fourth air pressure; The time for the fixed quantity Q to be completely consumed is calculated according to the liquid refrigerant loss rate as the fourth time, and the fourth time plus the preset time is used as the adjustment time; When the adjustment time arrives, the air pressure in the refrigerant storage chamber is obtained as the fifth air pressure, and the pressure between the fifth air pressure and the fourth air pressure is obtained as the pressure difference; The opening and closing width of the throttle valve is calculated based on the pressure difference, the quantitative Q and the opening and closing length of the throttle valve; The calculation formula of the opening and closing width is as follows: Where Q is the quantity of refrigerant, ω is the constant coefficient, λ is the empirical coefficient, μ is the dynamic viscosity of the liquid, ΔP2 is the pressure difference, l is the opening and closing length, and t2 is the second time.

6. An automatic refrigerant replenishment system for air conditioners, using the automatic refrigerant replenishment method for air conditioners according to any one of claims 1 to 5, comprising a refrigerant storage chamber detachably connected to an additional storage tank via a pipe, and a regulating valve is arranged in the pipe; It is characterized in that It includes a first pressure acquisition module, an input module and a notification module; The first pressure acquisition module is used to obtain the temperature difference between the thick copper tube and the thin copper tube in the air conditioner outdoor unit after the air conditioner is turned on for a first time, and determine whether the temperature difference is greater than a temperature threshold; If it is less than or equal to the temperature threshold, the current refrigerant pressure is obtained and marked as the first pressure; The input module is used to turn off the air conditioner, and after opening the regulating valve for a second time, close the regulating valve to allow the additional storage tank to input a fixed amount of Q refrigerant into the refrigerant storage chamber; The notification module is used to restart the air conditioner, and after starting and running for a first time, obtain the current refrigerant pressure, mark it as a second pressure, and determine whether the second pressure is greater than the first pressure; If it is greater, a pending signal is sent to the maintenance personnel; if it is not greater, a first signal is sent to the maintenance personnel.

7. The automatic refrigerant replenishment system for air conditioning according to claim 6, characterized in that: The notification module also includes a re-test submodule; The re-detection submodule is used to obtain the current refrigerant pressure after the air conditioner runs for a third time, marked as the third pressure. The pressure difference between the third pressure and the second pressure is obtained, and the pressure change value is obtained according to the pressure difference and the second time, and it is determined whether the pressure change value is greater than the first set value. If it is greater, the pending signal is modified to the first signal; if not, the pending signal is modified to the second signal.

8. The automatic refrigerant replenishment system for air conditioning according to claim 6, characterized in that: Also includes stabilization modules; The stabilization module is used to determine whether the pressure change value is 0. If it is 0, no operation is performed. If it is not 0, the gaseous refrigerant loss rate is obtained according to the pressure difference, the third time and the current temperature; the liquid refrigerant loss rate is obtained according to the relationship between the gaseous refrigerant loss rate and the density of the refrigerant, and the opening and closing width and adjustment time of the regulating valve are adjusted based on the liquid refrigerant loss rate.

9. The automatic refrigerant replenishment system for air conditioning according to claim 6, characterized in that: The stabilization module includes a fourth air pressure acquisition unit, an adjustment time acquisition unit, and an opening and closing width adjustment unit; The fourth air pressure obtaining unit is used to obtain the air pressure in the current additional storage tank as the fourth air pressure; The adjustment time acquisition unit is used to calculate the time when the air pressure in the refrigerant storage chamber reaches a fourth air pressure according to the gaseous refrigerant loss rate as the fourth time, and the fourth time plus the preset time as the adjustment time; The opening and closing width adjustment unit is used to obtain the air pressure in the refrigerant storage chamber as the fifth air pressure when the adjustment time arrives, and obtain the pressure between the fifth air pressure and the fourth air pressure as the pressure difference; The opening and closing width of the throttle valve is calculated based on the pressure difference, the quantitative Q and the opening and closing length of the throttle valve.

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