An automatic refrigerant replenishment method and system for air conditioners

Abstract

An automatic refrigerant replenishment method and system for air conditioners includes the following steps: After the air conditioner is turned on and running for a first time, the temperature difference between the thick and thin copper pipes in the outdoor unit is acquired, and it is determined whether the temperature difference is greater than a temperature threshold. If the temperature difference is less than or equal to the temperature threshold, the current refrigerant pressure is acquired and marked as a first pressure. After the air conditioner is turned off and the regulating valve is opened for a second time, the regulating valve is closed, allowing an additional storage tank to input a fixed amount Q of refrigerant into the refrigerant storage chamber. After the air conditioner is turned on again and running for a first time, the current refrigerant pressure is acquired and marked as a second pressure, and it is determined whether the second pressure is greater than the first pressure. If it is greater, a pending signal is sent to maintenance personnel and the user; if it is not greater, a first signal is sent to maintenance personnel and the user. The reason for insufficient refrigerant is communicated to maintenance personnel in advance, allowing them to determine whether to bring repair tools.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and in particular to an automatic refrigerant replenishment method for air conditioning systems. Background Technology

[0002] Refrigerant, commonly known as refrigerant fluid, is the working fluid used in refrigeration and air conditioning systems to transfer heat and produce a cooling effect; it is an essential material for air conditioning refrigeration. During non-use, refrigerant is continuously consumed. When the refrigerant is depleted to a certain level, the cooling effect of the air conditioner will significantly decrease, severely impacting the user experience.

[0003] Typically, users only check their air conditioner when they experience poor cooling performance. In such cases, a professional technician is needed to determine if there's a refrigerant shortage. There are two main causes of insufficient refrigerant: one is insufficient refrigerant due to its own depletion, and the other is insufficient refrigerant due to a pipe leak. The technician needs to identify the problem before performing any repairs. Regarding the second situation, since repairs require specialized tools, technicians typically don't bring them if they don't know the cause beforehand. However, if the second situation is confirmed, the technician will need to go back to retrieve the tools, which prolongs the repair time and negatively impacts the user's experience. Summary of the Invention

[0004] To address the aforementioned shortcomings, the present invention aims to provide an automatic refrigerant replenishment method and system for air conditioners, which can quickly identify the cause of insufficient refrigerant, expedite the air conditioner repair process, and avoid repair personnel having to travel back and forth to carry tools, thus reducing repair time.

[0005] To achieve this objective, the present invention adopts the following technical solution: an automatic refrigerant replenishment method for air conditioning, wherein the refrigerant storage chamber is detachably connected to an additional storage tank via a pipe, and a regulating valve is installed inside the pipe;

[0006] The method includes the following steps:

[0007] Step S1: After the air conditioner is turned on and running for the first time, obtain the temperature difference between the thick copper pipe and the thin copper pipe in the outdoor unit of the air conditioner, and determine whether the temperature difference is greater than the temperature threshold.

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

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

[0010] Step S3: Restart the air conditioner and after running for a short time, obtain the current refrigerant pressure, mark it as the second pressure, and determine whether the second pressure is greater than the first pressure;

[0011] If the second pressure is greater than the first pressure, a pending signal is sent to the maintenance personnel and the user; if the second pressure is not greater than the first pressure, 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 operation should also be performed:

[0013] After the air conditioner has been running for three hours, 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. Based on the pressure difference and the second time, the pressure change value is obtained. 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 it is not greater, the pending signal is modified to the second signal.

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

[0016] The rate of loss of gaseous refrigerant was obtained based on 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 refrigerant density, 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, and T is the current temperature. Let t be the pressure difference and t be the third time.

[0021] Preferably, the steps of adjusting the opening and closing width of the regulating valve and the adjustment time 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 when a quantitative Q is completely consumed is calculated based on the liquid refrigerant loss rate and used as the fourth time. The fourth time is added to the preset time to obtain the adjustment time.

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

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

[0026] The formula for calculating the opening and closing width is as follows:

[0027] ;

[0028] Where Q is the quantitative value of refrigerant, constant coefficients For empirical coefficients, For the dynamic viscosity of liquids, The pressure difference is l, and the opening / closing length is l. This is the second time.

[0029] An automatic refrigerant replenishment system for air conditioning, using the aforementioned automatic refrigerant replenishment method, includes a refrigerant storage chamber detachably connected to an additional storage tank via a pipe, wherein a regulating valve is installed inside 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 acquire the temperature difference between the thick copper pipe and the thin copper pipe in the outdoor unit of the air conditioner after the air conditioner is turned on and running for the first time, and to determine whether the temperature difference is greater than the temperature threshold.

[0032] If the pressure is less than or equal to the temperature threshold, then obtain the current refrigerant pressure and mark it 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 Q of refrigerant into the refrigerant storage chamber;

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

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

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

[0037] The re-inspection submodule is used to obtain the current refrigerant pressure after the third period of air conditioner operation and mark it as the third pressure.

[0038] The pressure difference between the third pressure and the second pressure is obtained. Based on the pressure difference and the second time, the pressure change value is obtained. 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 it is not greater, 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 based on the pressure difference, the third time, and the current temperature. The liquid refrigerant loss rate is obtained based on the relationship between the gaseous refrigerant loss rate and the refrigerant density. 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 / closing width adjustment unit;

[0042] The fourth pressure acquisition unit is used to acquire the current pressure in the additional storage tank as the fourth pressure.

[0043] The adjustment time acquisition unit is used to calculate the time when the air pressure in the refrigerant storage chamber reaches the fourth air pressure based on the gaseous refrigerant loss rate, and use the fourth time as the fourth time, and add the preset time to the fourth time as the adjustment time.

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

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

[0046] One of the above technical solutions has the following advantages or beneficial effects: This invention can quickly determine whether the refrigerant is insufficient by the temperature difference between the thick copper tube and the thin copper tube, and then determine the cause by different air pressures. This can speed up the process of finding the cause of insufficient refrigerant, thereby informing the maintenance personnel in advance of the cause of insufficient refrigerant. The maintenance personnel can determine whether to bring maintenance tools based on the cause of insufficient refrigerant, thus speeding up the air conditioner maintenance process. Attached Figure Description

[0047] Figure 1 This is a flowchart of one embodiment of the method of the present invention.

[0048] Figure 2 This is a schematic diagram of the structure of one embodiment of the system of the present invention. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] like Figures 1-2 As shown, an automatic refrigerant replenishment method for air conditioners is described, wherein a refrigerant storage chamber is detachably connected to an additional storage tank via a pipe, and a regulating valve is installed inside the pipe;

[0053] The method includes the following steps:

[0054] Step S1: After the air conditioner is turned on and running for the first time, obtain the temperature difference between the thick copper pipe and the thin copper pipe in the outdoor unit of the air conditioner, and determine whether the temperature difference is greater than the temperature threshold.

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

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

[0057] Step S3: Restart the air conditioner and after running for a short time, obtain the current refrigerant pressure, mark it as the second pressure, and determine whether the second pressure is greater than the first pressure;

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

[0059] In this invention, a pipe is connected to the existing refrigerant storage chamber, and an additional storage tank is installed at the end of the pipe. By opening the regulating valve, the refrigerant in the additional storage tank can flow into the refrigerant storage chamber by gravity to replenish it. Before this, step S1 needs to be performed. In this invention, temperature sensors are installed in the thick and thin copper pipes of the air conditioner outdoor unit to obtain the temperature of the thick and thin copper pipes respectively. When the refrigerant is insufficient, the temperature of the thick and thin copper pipes will approach the same, so whether the temperature difference is greater than the temperature threshold is used to determine whether the refrigerant is insufficient. Although this method can detect whether the refrigerant is insufficient, it cannot determine the cause of the insufficient refrigerant. Therefore, when the refrigerant is insufficient, a certain amount Q of refrigerant is input into the refrigerant storage chamber, and then the air conditioner is restarted. When it runs again for a period of time, the refrigerant pressure is obtained again and marked as the second pressure. Since the second pressure is the pressure detected after adding refrigerant, more gas will be generated, so the second pressure is greater than the first pressure. However, in the case of serious pipe leakage, the values ​​of the first pressure and the second pressure will be the same. Therefore, when the second pressure is not greater than the first pressure, a first signal needs to be sent to the maintenance personnel. This first signal informs the maintenance personnel that the refrigerant shortage is caused by a pipeline leak. After receiving the first signal, the maintenance personnel can bring professional repair tools to the user's home for inspection. During the inspection, they will also need to replenish the refrigerant in the extra storage tank. Of course, for better notification, the first signal will also be sent to the user.

[0060] When a minor leak occurs in the pipeline, the second pressure will still be greater than the first pressure for a short period. Therefore, the cause of the insufficient refrigerant cannot be determined at this time, and a pending signal is sent to maintenance personnel and the user. Since a small amount of refrigerant has already been replenished, the air conditioner will continue to cool. Further investigation can be conducted after a period of time to determine the cause of the insufficient refrigerant.

[0061] This invention quickly determines whether the refrigerant is insufficient by measuring the temperature difference between the thick and thin copper pipes. Then, it uses different air pressures to determine the cause, which can speed up the process of finding the cause of insufficient refrigerant. This allows maintenance personnel to be informed of the cause of insufficient refrigerant in advance, and they can then determine whether to bring repair tools based on the cause of insufficient refrigerant, ultimately speeding up the air conditioner repair process.

[0062] Preferably, when the second pressure is greater than the first pressure, the following operation should also be performed:

[0063] After the air conditioner has been running for three hours, 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. Based on the pressure difference and the second time, the pressure change value is obtained. 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 it is not greater, the pending signal is modified to the second signal.

[0065] The third time period is longer than the first and second times, and is 4-5 hours after the air conditioner is turned on. If a minor pipe leak occurs, there will be a change in the third pressure compared to the second pressure. Therefore, if the pressure change exceeds the first set value, it can be determined that the insufficient refrigerant is caused by a minor pipe leak. In this case, the pending signal can be changed to the first signal. Upon receiving the first signal, maintenance personnel can then take their tools to the user's location for repairs. If the pressure change does not exceed the first set value, the insufficient refrigerant is simply due to refrigerant consumption. Maintenance personnel only need to take the refrigerant and refilling tools to the user's location to replenish it, thus speeding up the air conditioner repair process.

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

[0067] The rate of loss of gaseous refrigerant was obtained based on 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 refrigerant density, and adjust the opening and closing width and adjustment time of the regulating valve based on the liquid refrigerant loss rate.

[0069] Since this is a minor leak in the pipes, maintenance personnel may not be able to reach the user in time to repair the pipes. The user's air conditioner still needs to perform cooling operations; if refrigerant is not replenished within a certain period, the air conditioner will not be able to continue cooling. Therefore, this situation needs to be considered in this invention. When the gaseous refrigerant loss rate is greater than a second set value, it indicates that a significant amount of refrigerant will leak after a period of time, leading to a reduction in cooling effect and affecting the user experience. Therefore, the additional storage tank in this invention stores liquid refrigerant. The liquid refrigerant loss rate is obtained based on the relationship between the gaseous refrigerant loss rate and the refrigerant density. This liquid refrigerant loss rate determines how much liquid refrigerant has been consumed, and the adjustment time is calculated based on when a given quantity Q of refrigerant will be consumed. After the adjustment time is reached, the opening and closing width of the regulating valve is adjusted so that, after a second time, refrigerant of theorem Q can be supplied to the refrigerant storage chamber. This ensures continuous cooling of the air conditioner for a short period until maintenance personnel arrive to repair the pipes or interfaces.

[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, and T is the current temperature. Let t be the pressure difference and t be the third time.

[0073] Preferably, the steps of adjusting the opening and closing width of the regulating valve and the adjustment time 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 it takes for a fixed quantity Q to be completely consumed is calculated based on the liquid refrigerant loss rate and used as the fourth time. A preset time is added to this fourth time to obtain the adjustment time. Since the liquid refrigerant loss rate is obtained from the instantaneous gaseous refrigerant loss rate in this invention, and the leakage rate of gas in the pipeline is related to the pressure, the leakage amount of gaseous refrigerant in the pipeline is non-linear. The time it takes for a fixed quantity Q to be completely consumed, calculated using the liquid refrigerant loss rate, is a linear theoretical value. To be on the safe side, the fourth time is added to the preset time as the adjustment time to ensure that the amount of refrigerant leaking in the pipeline is sufficient, thereby reducing the gas pressure in the refrigerant storage chamber. Because liquid refrigerant has a certain viscosity, if the pressure in the refrigerant storage chamber is too high, the amount of refrigerant added in the second time period cannot enter the refrigerant storage chamber.

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

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

[0078] The formula for calculating the opening and closing width is as follows:

[0079] ;

[0080] Where Q is the quantitative value of refrigerant, constant coefficients For empirical coefficients, For the dynamic viscosity of liquids, The pressure difference is l, and the opening / closing length is l. This is the second time.

[0081] In one embodiment of the present invention, the regulating valve is a rectangular opening regulating valve, 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 changed to π, and then the square root can be taken to obtain its opening and closing radius.

[0083] An automatic refrigerant replenishment system for air conditioning, using the aforementioned automatic refrigerant replenishment method, includes a refrigerant storage chamber detachably connected to an additional storage tank via a pipe, wherein a regulating valve is installed inside 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 acquire the temperature difference between the thick copper pipe and the thin copper pipe in the outdoor unit of the air conditioner after the air conditioner is turned on and running for the first time, and to determine whether the temperature difference is greater than the temperature threshold.

[0086] If the pressure is less than or equal to the temperature threshold, then obtain the current refrigerant pressure and mark it 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 Q of refrigerant into the refrigerant storage chamber;

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

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

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

[0091] The re-inspection submodule is used to obtain the current refrigerant pressure after the third period of air conditioner operation and mark it as the third pressure.

[0092] The pressure difference between the third pressure and the second pressure is obtained. Based on the pressure difference and the second time, the pressure change value is obtained. 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 it is not greater, 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 based on the pressure difference, the third time, and the current temperature. The liquid refrigerant loss rate is obtained based on the relationship between the gaseous refrigerant loss rate and the refrigerant density. 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 / closing width adjustment unit;

[0096] The fourth pressure acquisition unit is used to acquire the current pressure in the additional storage tank as the fourth pressure.

[0097] The adjustment time acquisition unit is used to calculate the time when the air pressure in the refrigerant storage chamber reaches the fourth air pressure based on the gaseous refrigerant loss rate, and use the fourth time as the fourth time, and add the preset time to the fourth time as the adjustment time.

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

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

[0100] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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

Claims

1. An automatic refrigerant replenishment method for air conditioners, characterized in that, The refrigerant storage chamber is detachably connected to an additional storage tank via a pipe, and a regulating valve is installed inside the pipe. The method includes the following steps: Step S1: After the air conditioner is turned on and running for the first time, obtain the temperature difference between the thick copper pipe and the thin copper pipe in the outdoor unit of the air conditioner, and determine whether the temperature difference is greater than the temperature threshold. If the pressure is less than or equal to the temperature threshold, then obtain the current refrigerant pressure and mark it as the first pressure; Step S2: After turning off the air conditioner and opening the regulating valve for the second time, close the regulating valve to allow the additional storage tank to input a fixed amount Q of refrigerant into the refrigerant storage chamber; Step S3: Restart the air conditioner and after running for a short time, obtain the current refrigerant pressure, mark it as the second pressure, and determine whether the second pressure is greater than the first pressure; If the second pressure is greater than the first pressure, a pending signal is sent to the maintenance personnel and the user; if the second pressure is not greater than the first pressure, 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 operation also needs to be performed: After the air conditioner has been running for three hours, 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. Based on the pressure difference and the second time, the pressure change value is obtained. 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 it is not greater, 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, the following operations still need to be performed: The rate of loss of gaseous refrigerant was obtained based on 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 refrigerant density, 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: ； Where n is the amount of refrigerant gas, R is the ideal gas constant of the refrigerant, and T is the current temperature. Let t be the pressure difference and t be the third time.

5. The automatic refrigerant replenishment method for air conditioning according to claim 3, characterized in that, The steps for adjusting the opening and closing width and 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 when a quantitative Q is completely consumed is calculated based on the liquid refrigerant loss rate and used as the fourth time. The fourth time is added to the preset time to obtain the adjustment time. When the adjustment time arrives, the air pressure inside the refrigerant storage chamber is obtained as the fifth air pressure, and the difference between the fifth air pressure and the fourth air pressure is obtained as the pressure difference; The opening and closing width of the valve is calculated based on the pressure difference, the metering Q, and the opening and closing length of the valve. The formula for calculating the opening and closing width is as follows: ； Where Q is the quantitative value of refrigerant, constant coefficients For empirical coefficients, For the dynamic viscosity of liquids, The pressure difference is l, and the opening / closing length is l. This is the second time.

6. An automatic refrigerant replenishment system for air conditioning, using the automatic refrigerant replenishment method for air conditioning as described in any one of claims 1 to 5, comprising a refrigerant storage chamber detachably connected to an additional storage tank via a pipe, wherein a regulating valve is provided in the pipe; Its features are, It includes a first pressure acquisition module, an input module, and a notification module; The first pressure acquisition module is used to acquire the temperature difference between the thick copper pipe and the thin copper pipe in the outdoor unit of the air conditioner after the air conditioner is turned on and running for the first time, and to determine whether the temperature difference is greater than the temperature threshold. If the pressure is less than or equal to the temperature threshold, then obtain the current refrigerant pressure and mark it 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 Q of refrigerant into the refrigerant storage chamber; The notification module is used to restart the air conditioner, and after starting operation for the first time, obtain the current refrigerant pressure, mark it as the second pressure, and determine whether the second pressure is greater than the first pressure. If the value is greater than the specified value, a pending signal is sent to the maintenance personnel; if the value is not greater than the specified value, a first signal is sent to the maintenance personnel.

7. An automatic refrigerant replenishment system for air conditioning according to claim 6, characterized in that, The notification module also includes a re-inspection submodule; The re-inspection submodule is used to obtain the current refrigerant pressure after the third period of air conditioner operation and mark it as the third pressure. The pressure difference between the third pressure and the second pressure is obtained. Based on the pressure difference and the second time, the pressure change value is obtained. 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 it is not greater, the pending signal is modified to the second signal.

8. An automatic refrigerant replenishment system for air conditioning according to claim 6, characterized in that, It also includes a stabilization module; 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 based on the pressure difference, the third time, and the current temperature. The liquid refrigerant loss rate is obtained based on the relationship between the gaseous refrigerant loss rate and the refrigerant density. The opening and closing width and adjustment time of the regulating valve are adjusted based on the liquid refrigerant loss rate.

9. An automatic refrigerant replenishment system for air conditioning according to claim 8, characterized in that, The stabilization module includes a fourth air pressure acquisition unit, an adjustment time acquisition unit, and an opening / closing width adjustment unit; The fourth pressure acquisition unit is used to acquire the current pressure in the additional storage tank as the fourth pressure. The adjustment time acquisition unit is used to calculate the time when the air pressure in the refrigerant storage chamber reaches the fourth air pressure based on the gaseous refrigerant loss rate, and use the fourth time as the fourth time, and add the preset time to the fourth time as the adjustment time. The opening and closing width adjustment unit is used to obtain the air pressure in the refrigerant storage cavity when the adjustment time is reached, as the fifth air pressure, and to obtain the difference between the fifth air pressure and the fourth air pressure as the pressure difference; The opening and closing width of the valve is calculated based on the pressure difference, the quantitative Q, and the opening and closing length of the valve.

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