Refrigerant supplement control method of air conditioner and air conditioner

Abstract

The present application relates to the technical field of air conditioners, and particularly relates to a refrigerant supplement control method of an air conditioner and the air conditioner. The present application aims to solve the problem of high maintenance cost of the air conditioner caused by manual refrigerant supplement in the case of refrigerant loss. For this purpose, the refrigerant supplement control method of the air conditioner, by comparing the first refrigerant pressure with the preset pressure value range when the air conditioner is in standby state, determining that the refrigerant amount in the circulating system is lost when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, in this case, the electric control valve is opened to supplement the refrigerant pre-filled in the liquid storage tank to the circulating system, so that whether the air conditioner is short of refrigerant can be judged by monitoring the pressure in the pipeline, and the refrigerant supplement to the circulating system of the air conditioner is controlled by the liquid storage tank, solving the problem of high maintenance cost of the air conditioner caused by manual refrigerant supplement in the case of refrigerant loss.

Description

TECHNICAL FIELD

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

[0002] At present, the refrigerant in the air conditioner, such as fluorine compound, has the characteristics of easy evaporation and easy liquefaction. When evaporated, it absorbs heat, and when liquefied, it releases heat. The air conditioner utilizes this characteristic to realize the transmission of energy, so as to achieve the purpose of refrigeration and heating. However, the lack of refrigerant is also a common fault in the use of air conditioners. Taking fluorine compound as an example, if the air conditioner lacks fluorine and continues to run for a long time, not only the refrigeration and heating effect is poor, but also the electric energy is wasted, and the compressor overheats. Long-term overheating not only reduces the insulation performance and reliability of the motor and shortens the service life of the motor, but also reduces the lubricating ability of the lubricating oil, and in severe cases, it will damage the compressor.

[0003] The user of the air conditioner judges the decline of the refrigeration / heating capacity of the air conditioner through the body sense or the thermometer, contacts the maintenance personnel to judge whether the air conditioner lacks refrigerant, and then the maintenance personnel supplements the refrigerant in the air conditioner through the carried equipment. This method not only consumes manpower and material resources, but also increases the maintenance cost of the air conditioner.

[0004] Correspondingly, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problem of high maintenance cost of the air conditioner caused by manual supplement of refrigerant when the air conditioner lacks refrigerant, the present application provides a refrigerant supplement control method of an air conditioner, the air conditioner comprising a circulating system and a refrigerant system, the refrigerant system comprising a first pressure sensor, an electrically controlled valve and a pre-filled refrigerant storage tank, the first pressure sensor being arranged in a pipeline connected with a compressor outlet in the circulating system, so as to monitor the refrigerant pressure in the pipeline; the refrigerant supplement control method comprising:

[0006] acquiring a first refrigerant pressure in the pipeline when the air conditioner is in a standby state;

[0007] comparing the first refrigerant pressure with a preset pressure value range;

[0008] when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, controlling the electrically controlled valve to open, so that the pre-filled refrigerant in the storage tank is supplemented into the circulating system.

[0009] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, when the first refrigerant pressure is less than the lower limit of the preset pressure value range, the step of controlling the electric control valve to open further comprises:

[0010] When the first refrigerant pressure is less than the lower limit of the preset pressure value range, the second refrigerant pressure in the liquid tank is obtained;

[0011] The size of the second refrigerant pressure and the lower limit of the preset pressure value range is judged;

[0012] When the second refrigerant pressure is greater than the lower limit of the preset pressure value range, the electric control valve is controlled to open.

[0013] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, after the step of controlling the electric control valve to open when the second refrigerant pressure is greater than the lower limit of the preset pressure value range, further comprises:

[0014] The first refrigerant pressure is obtained again;

[0015] Whether the first refrigerant pressure is in the preset pressure value range is judged;

[0016] When the first refrigerant pressure is in the preset pressure value range, the electric control valve is controlled to close.

[0017] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, after the step of controlling the electric control valve to open when the second refrigerant pressure is greater than the lower limit of the preset pressure value range, further comprises:

[0018] The first refrigerant pressure is obtained again;

[0019] Whether the first refrigerant pressure is in the preset pressure value range is judged;

[0020] When the first refrigerant pressure is in the preset pressure value range, the electric control valve is controlled to close.

[0021] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, after the step of controlling the electric control valve to close when the first refrigerant pressure is in the preset pressure value range, further comprises:

[0022] When the air conditioner is in the running state, the air conditioner display is controlled to display the refrigerant amount normal result in the circulating system.

[0023] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, after the step of "controlling the electric control valve to open when the first refrigerant pressure is greater than the lower limit value of the preset pressure value range", the method further comprises:

[0024] When the first refrigerant pressure is less than the lower limit value of the preset pressure value range, the second refrigerant pressure is obtained again.

[0025] The size of the second refrigerant pressure and the lower limit value of the preset pressure value range is judged.

[0026] When the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, the electric control valve is controlled to close.

[0027] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, after the step of "when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, the electric control valve is controlled to close", the method further comprises:

[0028] When the air conditioner is in the running state, the air conditioner display is controlled to display the refrigerant amount abnormality result in the liquid storage tank.

[0029] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0030] When the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, it is determined that the refrigerant in the liquid storage tank is missing.

[0031] When the air conditioner is in the running state, the air conditioner display is controlled to display the refrigerant amount abnormality result in the liquid storage tank.

[0032] In the preferred technical scheme of the refrigerant supplement control method of the air conditioner, when the air conditioner further comprises a first temperature sensor and a second temperature sensor, and the first temperature sensor is arranged in the pipeline to monitor the refrigerant temperature in the pipeline, and the second temperature sensor is arranged on the air conditioner to monitor the ambient temperature, the step of "obtaining the first refrigerant pressure in the pipeline" further comprises:

[0033] The ambient temperature and the refrigerant temperature in the pipeline are obtained.

[0034] The size of the refrigerant temperature and the ambient temperature and whether the refrigerant temperature is in the preset temperature value range are judged.

[0035] When the refrigerant temperature is equal to the ambient temperature and the refrigerant temperature is in the preset temperature value range, the first refrigerant pressure in the pipeline is obtained.

[0036] In the preferred technical solutions of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0037] When the refrigerant temperature is not equal to the ambient temperature, and / or the first refrigerant temperature is not within the preset temperature value range, the refrigerant system is controlled not to operate.

[0038] In the preferred technical solutions of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0039] When the first refrigerant pressure is greater than the upper limit of the preset pressure value range, it is determined that the refrigerant amount in the circulation system is abnormal, and the electric control valve is controlled to remain in the closed state.

[0040] In the preferred technical solutions of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0041] When the air conditioner is in the operating state, the air conditioner display is controlled to display the result that the refrigerant amount in the circulation system is normal.

[0042] In the preferred technical solutions of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0043] When the first refrigerant pressure is within the preset pressure value range, it is determined that the refrigerant amount in the circulation system is normal, and the electric control valve is controlled to remain in the closed state.

[0044] In the preferred technical solutions of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0045] When the air conditioner is in the operating state, the air conditioner display is controlled to display the result that the refrigerant amount in the circulation system is normal.

[0046] In the preferred technical solutions of the refrigerant supplement control method of the air conditioner, the refrigerant supplement control method further comprises:

[0047] When the electric control valve is in the open state, the air conditioner is controlled to be in the standby state.

[0048] When the electric control valve is in the closed state, the air conditioner is controlled to start operating. The application also provides an air conditioner, which comprises a controller configured to be capable of executing the refrigerant supplement control method of the air conditioner described in the above preferred technical solutions.

[0049] Scheme 1. A refrigerant supplement control method of an air conditioner, wherein the air conditioner comprises a circulation system and a refrigerant system, the refrigerant system comprises a first pressure sensor, an electrically controlled valve and a pre-filled refrigerant storage tank, the first pressure sensor is arranged in a pipeline connected with a compressor outlet of the circulation system to monitor the refrigerant pressure in the pipeline, and the refrigerant supplement control method comprises:

[0050] acquiring a first refrigerant pressure in the pipeline when the air conditioner is in a standby state;

[0051] comparing the first refrigerant pressure with a preset pressure value range;

[0052] controlling the electrically controlled valve to open when the first refrigerant pressure is less than a lower limit value of the preset pressure value range, so that the pre-filled refrigerant in the storage tank is supplemented into the circulation system.

[0053] Scheme 2. The refrigerant supplement control method of the air conditioner according to Scheme 1, wherein when the refrigerant system further comprises a second pressure sensor arranged in the storage tank to monitor the refrigerant pressure in the storage tank, the step of "controlling the electrically controlled valve to open when the first refrigerant pressure is less than the lower limit value of the preset pressure value range" further comprises:

[0054] acquiring a second refrigerant pressure in the storage tank when the first refrigerant pressure is less than the lower limit value of the preset pressure value range;

[0055] judging the second refrigerant pressure and the lower limit value of the preset pressure value range;

[0056] controlling the electrically controlled valve to open when the second refrigerant pressure is greater than the lower limit value of the preset pressure value range.

[0057] Scheme 3. The refrigerant supplement control method of the air conditioner according to Scheme 2, wherein after the step of "controlling the electrically controlled valve to open when the second refrigerant pressure is greater than the lower limit value of the preset pressure value range", the method further comprises:

[0058] acquiring the first refrigerant pressure again;

[0059] judging whether the first refrigerant pressure is in the preset pressure value range;

[0060] controlling the electrically controlled valve to close when the first refrigerant pressure is in the preset pressure value range.

[0061] Scheme 4. The refrigerant supplement control method of the air conditioner according to scheme 3, characterized in that, after the step of "controlling the electrically controlled valve to close when the first refrigerant pressure is in the preset pressure value range", further comprising:

[0062] controlling the air conditioner display to display a normal result of the refrigerant amount in the circulation system when the air conditioner is in the running state.

[0063] Scheme 5. The refrigerant supplement control method of the air conditioner according to scheme 3, characterized in that, after the step of "controlling the electrically controlled valve to open when the first refrigerant pressure is greater than the lower limit value of the preset pressure value range", further comprising:

[0064] when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, acquiring the second refrigerant pressure again;

[0065] judging the size of the second refrigerant pressure and the lower limit value of the preset pressure value range;

[0066] controlling the electrically controlled valve to close when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range.

[0067] Scheme 6. The refrigerant supplement control method of the air conditioner according to scheme 5, characterized in that, after the step of "controlling the electrically controlled valve to close when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range", further comprising:

[0068] controlling the air conditioner display to display an abnormal result of the refrigerant amount in the liquid storage tank when the air conditioner is in the running state.

[0069] Scheme 7. The refrigerant supplement control method of the air conditioner according to scheme 2, characterized in that, the refrigerant supplement control method further comprises:

[0070] when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, determining that the refrigerant in the liquid storage tank is missing;

[0071] controlling the air conditioner display to display an abnormal result of the refrigerant amount in the liquid storage tank when the air conditioner is in the running state.

[0072] Scheme 8. The refrigerant supplement control method of the air conditioner according to scheme 1, characterized in that, when the air conditioner further comprises a first temperature sensor and a second temperature sensor, and the first temperature sensor is arranged in the pipeline for monitoring the refrigerant temperature in the pipeline, and the second temperature sensor is arranged on the air conditioner for monitoring the ambient temperature, the step of "acquiring the first refrigerant pressure in the pipeline" further comprises:

[0073] acquiring the ambient temperature and the refrigerant temperature in the pipeline;

[0074] determining whether the refrigerant temperature is equal to the ambient temperature and whether the refrigerant temperature is within a preset temperature value range;

[0075] obtaining the first refrigerant pressure in the pipeline when the refrigerant temperature is equal to the ambient temperature and the refrigerant temperature is within a preset temperature value range.

[0076] Scheme 9. The refrigerant supplement control method of the air conditioner according to Scheme 8, characterized in that the refrigerant supplement control method further comprises:

[0077] controlling the refrigerant system not to operate when the refrigerant temperature is not equal to the ambient temperature and / or the first refrigerant temperature is not within a preset temperature value range.

[0078] Scheme 10. The refrigerant supplement control method of the air conditioner according to Scheme 1, characterized in that the refrigerant supplement control method further comprises:

[0079] determining that the refrigerant amount in the circulation system is abnormal when the first refrigerant pressure is greater than an upper limit value of a preset pressure value range, and controlling the electric control valve to remain in a closed state.

[0080] Scheme 11. The refrigerant supplement control method of the air conditioner according to Scheme 10, characterized in that the refrigerant supplement control method further comprises:

[0081] controlling the air conditioner display to display a result that the refrigerant amount in the circulation system is abnormal when the air conditioner is in an operating state.

[0082] Scheme 12. The refrigerant supplement control method of the air conditioner according to Scheme 1, characterized in that the refrigerant supplement control method further comprises:

[0083] determining that the refrigerant amount in the circulation system is normal when the first refrigerant pressure is within a preset pressure value range, and controlling the electric control valve to remain in a closed state.

[0084] Scheme 13. The refrigerant supplement control method of the air conditioner according to Scheme 12, characterized in that the refrigerant supplement control method further comprises:

[0085] controlling the air conditioner display to display a result that the refrigerant amount in the circulation system is normal when the air conditioner is in an operating state.

[0086] Scheme 14. The refrigerant supplement control method of the air conditioner according to Scheme 1, characterized in that the refrigerant supplement control method further comprises:

[0087] controlling the air conditioner to be in a standby state when the electric control valve is in an open state.

[0088] controlling the air conditioner to start running when the electrically controlled valve is in the open state.

[0089] Scheme 15. An air conditioner, characterized in that the air conditioner comprises a controller configured to be capable of executing the refrigerant supplement control method of the air conditioner according to any one of schemes 1 to 14.

[0090] In the preferred technical scheme of the present application, by comparing the first refrigerant pressure with the preset pressure value range when the air conditioner is in the standby state, it is determined that the refrigerant amount in the circulating system is missing when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, in which case the electrically controlled valve is controlled to open to allow the refrigerant pre-filled in the liquid accumulator to supplement the circulating system, so that whether the air conditioner is missing refrigerant can be determined by monitoring the pressure in the pipeline, and the liquid accumulator supplements the refrigerant to the circulating system of the air conditioner, solving the problem of high maintenance cost of the air conditioner caused by manual refrigerant supplement when the air conditioner is missing refrigerant.

[0091] Further, by comparing the second refrigerant pressure with the lower limit value of the preset pressure value range when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, it is determined whether the liquid accumulator can supplement refrigerant to the circulating system, and the electrically controlled valve is controlled to open to supplement refrigerant to the circulating system of the air conditioner when the second refrigerant pressure is greater than the lower limit value of the preset pressure value range.

[0092] Further, during the process of supplementing refrigerant from the liquid accumulator to the circulating system of the air conditioner, the first refrigerant pressure is obtained again, and the first refrigerant pressure is compared with the preset pressure value range to determine whether the liquid accumulator still needs to supplement refrigerant to the circulating system of the air conditioner, and when the first refrigerant pressure is in the preset pressure value range, it indicates that the refrigerant amount in the circulating system is normal, and the electrically controlled valve is controlled to close to end the refrigerant supplement to the circulating system.

[0093] Further, after the liquid accumulator finishes supplementing refrigerant to the circulating system, the air conditioner display is controlled to display that the refrigerant amount in the circulating system is normal, thereby improving the user experience.

[0094] Further, by obtaining the second refrigerant pressure again when the first refrigerant pressure is less than the lower limit value of the preset pressure range, and comparing the second refrigerant pressure with the lower limit value of the preset pressure value range, it is determined whether the refrigerant in the liquid accumulator is sufficient, and when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, it indicates that the refrigerant in the liquid accumulator is insufficient, and the electrically controlled valve is controlled to close to end the refrigerant supplement to the circulating system.

[0095] Further, by determining that the refrigerant in the liquid storage tank is missing when the second refrigerant pressure is less than or equal to the lower limit of the preset pressure value range, and by controlling the air conditioner display to display the refrigerant amount abnormality result in the liquid storage tank when the air conditioner is in the running state, the user can directly determine whether the air conditioner is missing refrigerant through the air conditioner display, avoiding the need for maintenance personnel to determine whether the air conditioner is missing refrigerant, and reducing costs.

[0096] Further, by obtaining the first refrigerant pressure in the pipeline under the condition that the refrigerant temperature is equal to the ambient temperature and the refrigerant temperature is within the preset temperature value range, the testing accuracy of the refrigerant pressure in the pipeline can be improved, and the judgment of the refrigerant amount in the circulating system can be affected by inaccurate testing of the refrigerant pressure in the pipeline.

[0097] Further, by controlling the refrigerant system not to run when the first refrigerant temperature is not equal to the ambient temperature and / or the first refrigerant temperature is not within the preset temperature value range, the problem of inaccurate refrigerant missing judgment of the air conditioner due to inaccurate first refrigerant pressure can be avoided.

[0098] Further, by controlling the air conditioner display to display the refrigerant amount state in the circulating system when the air conditioner is in the running state, the user can be informed of the refrigerant state in the air conditioner in a timely manner, and the user experience can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0099] The refrigerant supplement control method of the air conditioner of the present application is described below with reference to the accompanying drawings.

[0100] In the drawings:

[0101] Figure 1 The flowchart of the refrigerant supplement control method of the recreational vehicle air conditioner of the present application;

[0102] Figure 2 The logic diagram of one possible implementation of the refrigerant supplement control method of the recreational vehicle air conditioner of the present application. DETAILED DESCRIPTION

[0103] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. For example, although the present embodiments are introduced in combination with the recreational vehicle air conditioner, this is not intended to limit the protection scope of the present application, and those skilled in the art can apply the present application to other types of air conditioners, such as household air conditioners, without deviating from the principles of the present application.

[0104] Firstly, the refrigerant supplement control method of the recreational vehicle air conditioner of the present application is described. Figure 1 and Figure 2 , the refrigerant supplement control method of the recreational vehicle air conditioner of the present application is described.Figure 1 a flow chart of a refrigerant supplement control method of a recreational vehicle air conditioner of the present application; Figure 2 a logic diagram of one possible implementation of a refrigerant supplement control method of a recreational vehicle air conditioner of the present application.

[0105] In order to solve the problem of high maintenance cost of the air conditioner caused by manual supplement of refrigerant in the case of refrigerant deficiency, the present application provides a refrigerant supplement control method of an air conditioner, the air conditioner comprising a circulation system and a refrigerant system, the refrigerant system comprising a first pressure sensor, an electrically controlled valve and a pre-filled refrigerant storage tank, the first pressure sensor being arranged in a pipeline connected with an outlet of a compressor in the circulation system so as to monitor the refrigerant pressure in the pipeline.

[0106] As shown in the above arrangement, the refrigerant supplement control method of the recreational vehicle air conditioner of the present application comprises: Figure 1

[0107] S101, acquiring the first refrigerant pressure in the pipeline when the air conditioner is in standby state. For example, a pressure sensor for acquiring the first refrigerant pressure can be arranged in the pipeline, and the first refrigerant pressure in the pipeline is detected by the pressure sensor.

[0108] S102, judging whether the first refrigerant pressure is within a preset pressure value range. For example, after detecting the first refrigerant pressure in the pipeline, whether the first refrigerant pressure is within the preset pressure value range is judged by comparing the difference between the upper limit value and the lower limit value of the preset pressure value or the ratio between the two, so as to determine whether the circulation system is deficient in refrigerant.

[0109] S103, when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, controlling the electrically controlled valve to open so that the pre-filled refrigerant in the storage tank is supplemented into the circulation system. For example, when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, it can be determined that the circulation system is deficient in refrigerant, and after determining that the circulation system is deficient in refrigerant, the electrically controlled valve is controlled to open so that the pre-filled refrigerant in the storage tank can be supplemented into the circulation system.

[0110] By comparing the first refrigerant pressure with the preset pressure value range when the air conditioner is in standby state, it is determined that the circulation system is deficient in refrigerant when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, and in this case, the electrically controlled valve is controlled to open so that the pre-filled refrigerant in the storage tank is supplemented into the circulation system, thereby judging whether the air conditioner is deficient in refrigerant by monitoring the pressure in the pipeline, and supplementing the refrigerant into the circulation system of the air conditioner by the storage tank, so as to solve the problem of high maintenance cost of the air conditioner caused by manual supplement of refrigerant in the case of refrigerant deficiency. ​

[0111] It should be noted that the circulating system of the air conditioner includes a compressor, a heat exchanger (or a condenser), and the like, and is not limited herein as long as the circulating system can enable the air conditioner to realize the refrigeration and heating functions.

[0112] The preferred embodiments of the refrigerant supplement control method of the air conditioner of the present application are described below. In one embodiment, when the air conditioner further includes a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged in the pipeline to monitor the refrigerant temperature in the pipeline, and the second temperature sensor is arranged on the air conditioner to monitor the ambient temperature, the step of "obtaining the first refrigerant pressure in the pipeline" includes the following steps before it:

[0113] obtaining the ambient temperature and the refrigerant temperature in the pipeline;

[0114] determining the size of the refrigerant temperature and the ambient temperature and whether the refrigerant temperature is within the preset temperature value range;

[0115] when the refrigerant temperature is equal to the ambient temperature and the refrigerant temperature is within the preset temperature value range, obtaining the first refrigerant pressure in the pipeline.

[0116] It should be noted that the present application does not limit the arrangement position of the second temperature sensor as long as it can monitor the ambient temperature. For example, the second temperature sensor is arranged on the outer wall of the shell of the air conditioner.

[0117] For example, the preset temperature value range is (-10℃, 40℃), i.e., the preset temperature value is greater than or equal to -10℃ and less than or equal to 40℃. When the air conditioner is in the standby state, the refrigerant temperature in the pipeline is the same as the ambient temperature, and both are -10℃, 0℃, 10℃, 20℃, 30℃, 40℃ or other temperature values greater than or equal to -10℃ and less than or equal to 40℃, and the refrigerant temperature is within the preset temperature value range. At this time, the first refrigerant pressure in the pipeline is obtained, which can improve the accuracy of the first refrigerant pressure and avoid the problem of inaccurate first refrigerant pressure test when the refrigerant temperature and the ambient temperature are different and the refrigerant temperature is not within the preset temperature value range.

[0118] Further, the refrigerant supplement control method further includes:

[0119] when the refrigerant temperature is not equal to the ambient temperature and / or the first refrigerant temperature is not within the preset temperature value range, controlling the refrigerant system not to run.

[0120] For example, the preset temperature value range is (-10℃, 40℃). When the air conditioner is in standby state, the refrigerant temperature in the pipeline and the ambient temperature are both 42℃, but the refrigerant temperature and the ambient temperature are too high and are not in the preset temperature value range (-10℃, 40℃), at this time, in order to ensure the safety of the air conditioner, the refrigerant system is controlled not to run. Alternatively, when the air conditioner is in standby state, the refrigerant temperature in the pipeline and the ambient temperature are both -15℃, but the refrigerant temperature and the ambient temperature are too low and are not in the preset temperature value range, at this time, in order to ensure the safety of the air conditioner, the refrigerant system is controlled not to run.

[0121] In an embodiment, when the refrigerant system further comprises a second pressure sensor arranged in the liquid storage tank for monitoring the refrigerant pressure in the liquid storage tank, the step of "controlling the electric control valve to open when the first refrigerant pressure is less than the lower limit value of the preset pressure value range" further comprises:

[0122] When the first refrigerant pressure is less than the lower limit value of the preset pressure value range, the second refrigerant pressure in the liquid storage tank is obtained;

[0123] The second refrigerant pressure is compared with the lower limit value of the preset pressure value range;

[0124] When the second refrigerant pressure is greater than the lower limit value of the preset pressure value range, the electric control valve is controlled to open.

[0125] For example, the preset pressure value range is (1.4MPa, 1.6MPa), that is, the preset pressure value is greater than or equal to 1.4MPa and less than or equal to 1.6MPa. When the first refrigerant pressure is less than the lower limit value of the preset pressure value range, that is, the first refrigerant pressure is less than 1.4MPa, it indicates that the refrigerant amount in the circulating system of the air conditioner is insufficient, in order to supplement the refrigerant in the circulating system, the second refrigerant pressure in the liquid storage tank is obtained, and the second refrigerant pressure is compared with the lower limit value of the preset pressure value range to determine whether the refrigerant amount in the liquid storage tank is sufficient. When the second refrigerant pressure in the liquid storage tank is greater than 1.4MPa, it indicates that the refrigerant amount in the liquid storage tank is sufficient, and the electric control valve is controlled to open so that the refrigerant in the liquid storage tank can be supplemented into the circulating system.

[0126] Further, after the step of "controlling the electric control valve to open when the second refrigerant pressure is greater than the lower limit value of the preset pressure value range", the following steps are further included:

[0127] The first refrigerant pressure is obtained again;

[0128] It is determined whether the first refrigerant pressure is in the preset pressure value range;

[0129] When the first refrigerant pressure is in the preset pressure value range, the electric control valve is controlled to close.

[0130] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the refrigerant in the liquid storage tank enters the circulating system to supplement the refrigerant of the air conditioner, whether the refrigerant supplement is completed is determined by determining whether the first refrigerant pressure is in the preset pressure value range. When the first refrigerant pressure is 1.5 MPa, the first refrigerant pressure is in the preset pressure value range, which indicates that the refrigerant amount in the circulating system is normal. At this time, the electric control valve is controlled to be closed, and the supplement of the refrigerant from the liquid storage tank to the circulating system is ended.

[0131] The step of "when the first refrigerant pressure is in the preset pressure value range, the electric control valve is controlled to be closed" further includes:

[0132] When the air conditioner is in the running state, the air conditioner display is controlled to display the result that the refrigerant amount in the circulating system is normal.

[0133] It should be noted that after the supplement of the refrigerant from the liquid storage tank to the circulating system is completed, when the air conditioner is in the running state, the air conditioner display is controlled to display the result that the refrigerant amount in the circulating system is normal, so that the user can timely know the refrigerant condition in the air conditioner.

[0134] Further, the step of "when the first refrigerant pressure is greater than the lower limit value of the preset pressure value range, the electric control valve is controlled to be opened" further includes:

[0135] When the first refrigerant pressure is less than the lower limit value of the preset pressure value range, the second refrigerant pressure is acquired again.

[0136] The second refrigerant pressure is compared with the lower limit value of the preset pressure value range.

[0137] When the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, the electric control valve is controlled to be closed.

[0138] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the refrigerant in the liquid storage tank enters the circulating system to supplement the refrigerant of the air conditioner, the second refrigerant pressure is acquired when the first refrigerant pressure is less than 1.4 MPa. Whether the refrigerant amount in the liquid storage tank is sufficient is determined by comparing the second refrigerant pressure with the lower limit value of the preset pressure value range. When the second refrigerant pressure is less than or equal to 1.4 MPa, it indicates that the refrigerant amount in the liquid storage tank is insufficient, and at this time, the electric control valve is controlled to be closed.

[0139] Further, the step of "when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, the electric control valve is controlled to be closed" further includes:

[0140] When the air conditioner is in the running state, the air conditioner display is controlled to display the abnormal result of the refrigerant amount in the liquid storage tank.

[0141] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the second refrigerant pressure is less than or equal to 1.4 MPa during the process of the refrigerant in the liquid storage tank entering the circulating system to supplement the refrigerant of the air conditioner, it indicates that the refrigerant amount in the liquid storage tank is insufficient. In order to enable the user to know the refrigerant state in the air conditioner in time, the air conditioner display is controlled to display the abnormal result of the refrigerant amount in the liquid storage tank.

[0142] In an embodiment, the refrigerant supplement control method further comprises:

[0143] When the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, it is determined that the refrigerant in the liquid storage tank is missing.

[0144] When the air conditioner is in the running state, the air conditioner display is controlled to display the abnormal result of the refrigerant amount in the liquid storage tank.

[0145] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the second refrigerant pressure is 1.4 MPa, 1.3 MPa or other pressure value less than 1.4 MPa, it indicates that the refrigerant pressure in the liquid storage tank is insufficient. In order to enable the user to know the refrigerant state in the air conditioner in time, when the air conditioner is in the running state, the air conditioner display is controlled to display the insufficient refrigerant in the liquid storage tank.

[0146] In an embodiment, the refrigerant supplement control method further comprises:

[0147] When the first refrigerant pressure is greater than the upper limit value of the preset pressure value range, it is determined that the refrigerant amount in the circulating system is abnormal, and the electric control valve is controlled to remain in the closed state.

[0148] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the first refrigerant pressure is 1.7 MPa, the first refrigerant pressure is greater than the upper limit value of the preset pressure value range at this time, the refrigerant amount in the circulating system is abnormal at this time, the liquid storage tank does not need to supplement the refrigerant to the circulating system, and the electric control valve is controlled to remain in the closed state at this time.

[0149] Further, the refrigerant supplement control method further comprises:

[0150] When the air conditioner is in the running state, the air conditioner display is controlled to display the abnormal result of the refrigerant amount in the circulating system.

[0151] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the first refrigerant pressure is 1.7 MPa, the refrigerant amount in the circulating system is abnormal. In order to enable the user to know the refrigerant state in the air conditioner in time, the air conditioner display is controlled to display the refrigerant amount abnormal result in the circulating system.

[0152] In an embodiment, the refrigerant supplement control method further comprises:

[0153] When the first refrigerant pressure is in the preset pressure value range, it is determined that the refrigerant amount in the circulating system is normal, and the electric control valve is controlled to remain in the closed state.

[0154] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the first refrigerant pressure is 1.5 MPa, the first refrigerant pressure is in the preset pressure range, and the refrigerant amount in the circulating system is normal. The liquid tank does not need to supplement the refrigerant to the circulating system, and the electric control valve is controlled to remain in the closed state.

[0155] Further, the refrigerant supplement control method further comprises:

[0156] When the air conditioner is in the running state, the air conditioner display is controlled to display the refrigerant amount normal result in the circulating system.

[0157] For example, the preset pressure value range is (1.4 MPa, 1.6 MPa). When the first refrigerant pressure is 1.5 MPa, the refrigerant amount in the circulating system is normal. In order to enable the user to know the refrigerant state in the air conditioner in time, the air conditioner display is controlled to display the refrigerant amount normal result in the circulating system.

[0158] In an embodiment, the refrigerant supplement control method further comprises:

[0159] When the electric control valve is in the open state, the air conditioner is controlled to be in the standby state.

[0160] When the electric control valve is in the closed state, the air conditioner is controlled to start running.

[0161] It should be noted that the first pressure sensor monitors the refrigerant amount in the pipeline, the second pressure sensor monitors the refrigerant amount in the liquid tank, and the operation of supplementing the refrigerant from the liquid tank to the circulating system are all performed when the air conditioner is not running, i.e. in the standby state. When the refrigerant amount in the liquid tank is abnormal, the refrigerant amount in the circulating system is normal, and the refrigerant amount in the circulating system is abnormal, the air conditioner can start running because the refrigerant supplement operation is not performed.

[0162] The following will be described in combination with Figure 2 A possible running process of the air conditioner of the present application will be briefly described. Among them, Figure 2A logic diagram of one possible implementation of the refrigerant supplement control method of the air conditioner of the present application

[0163] As shown in one possible operation process: Figure 2

[0164] S201, obtain the ambient temperature and the refrigerant temperature in the pipeline, and then execute S202.

[0165] S202, determine whether the ambient temperature is equal to the refrigerant temperature and whether the refrigerant temperature is within the range of (-10℃, 40℃). If yes, execute S204; if no, execute S203.

[0166] S203, control the refrigerant system not to start, and then return to execute S201.

[0167] S204, obtain the first refrigerant pressure in the pipeline, and then execute S205.

[0168] S205, compare the first refrigerant pressure with (1.4MPa, 1.6MPa). If the first refrigerant pressure is less than 1.4MPa, execute S206; if the first refrigerant pressure is greater than 1.6MPa, execute S218; if the first refrigerant pressure is within the range of (1.4MPa, 1.6MPa), execute S21.

[0169] S206, obtain the second refrigerant pressure, and then execute S207.

[0170] S207, determine whether the second refrigerant pressure is greater than the lower limit value of the preset pressure range. If yes, execute S208; if no, execute S213.

[0171] S208, control the electric control valve to open, and then execute S209

[0172] S209, obtain the first refrigerant pressure, and then execute S210.

[0173] S210, compare the first refrigerant pressure with (1.4MPa, 1.6MPa). If the first refrigerant pressure is within the range of (1.4MPa, 1.6MPa), execute S211; if the first refrigerant pressure is less than 1.4MPa, return to execute S215.

[0174] S211, control the electric control valve to close, and then execute S212.

[0175] S212, when the air conditioner is in the running state, control the air conditioner display to display the normal result of the refrigerant amount in the circulation system.​

[0176] S213, determining that the refrigerant in the liquid storage tank is missing, and then performing S214;

[0177] S214, when the air conditioner is in the running state, controlling the air conditioner display to display the refrigerant amount abnormality result in the liquid storage tank.

[0178] S215, obtaining the second refrigerant pressure;

[0179] S216, determining whether the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range. If the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure range, S217 is performed; if the second refrigerant pressure is greater than the upper limit value of the preset pressure range, S208 is returned to perform.

[0180] S217, controlling the electric control valve to be closed, and then performing S218.

[0181] S218, when the air conditioner is in the running state, controlling the air conditioner display to display the refrigerant amount abnormality result in the liquid storage tank.

[0182] S219, controlling the electric control valve to remain in the closed state, and then performing S220.

[0183] S220, when the air conditioner is in the running state, controlling the air conditioner display to display the refrigerant amount abnormality result in the circulating system.

[0184] S221, controlling the electric control valve to remain in the closed state, and then performing S222.

[0185] S222, when the air conditioner is in the running state, controlling the air conditioner display to display the refrigerant amount normality result in the circulating system.

[0186] In addition, the present application also provides an air conditioner, which comprises a controller configured to be capable of performing the refrigerant supplement control method of the air conditioner according to any of the above-mentioned embodiments.

[0187] Those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0188] It should be noted that although the detailed steps of the method of the present application are described in detail above, the skilled in the art can combine, split and change the order of the above steps without deviating from the basic principles of the present application. The modified technical solutions do not change the basic concept of the present application and thus fall within the protection scope of the present application.

[0189] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but the skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. The skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A refrigerant supplement control method of an air conditioner, characterized by, The air conditioner comprises a circulating system and a refrigerant system, the refrigerant system comprises a first pressure sensor, an electrically controlled valve and a pre-filled refrigerant storage tank, the first pressure sensor is arranged in a pipeline connected with a compressor outlet of the circulating system to monitor the refrigerant pressure in the pipeline; The refrigerant supplement control method comprises: When the air conditioner is in a standby state, a first refrigerant pressure in the pipeline is obtained; The first refrigerant pressure is compared with a preset pressure value range; When the first refrigerant pressure is less than a lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be opened to make the pre-filled refrigerant in the storage tank supplement into the circulating system.

2. The refrigerant supplement control method of claim 1, wherein, When the air conditioner further comprises a second pressure sensor arranged in the storage tank to monitor the refrigerant pressure in the storage tank, the step of "when the first refrigerant pressure is less than the lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be opened" further comprises: When the first refrigerant pressure is less than the lower limit value of the preset pressure value range, a second refrigerant pressure in the storage tank is obtained; The second refrigerant pressure is compared with the lower limit value of the preset pressure value range; When the second refrigerant pressure is greater than the lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be opened.

3. The refrigerant supplement control method of the air conditioner according to claim 2, characterized by, After the step of "when the second refrigerant pressure is greater than the lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be opened", further comprising: The first refrigerant pressure is obtained again; It is judged whether the first refrigerant pressure is in the preset pressure value range; When the first refrigerant pressure is in the preset pressure value range, the electrically controlled valve is controlled to be closed.

4. The refrigerant supplement control method of claim 3, wherein, After the step of "when the first refrigerant pressure is in the preset pressure value range, the electrically controlled valve is controlled to be closed", further comprising: When the air conditioner is in a running state, an air conditioner display is controlled to display a normal result of the refrigerant amount in the circulating system.

5. The refrigerant supplement control method of the air conditioner according to claim 3, characterized by, After the step of "when the first refrigerant pressure is greater than the lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be opened", further comprising: When the first refrigerant pressure is less than the lower limit value of the preset pressure value range, the second refrigerant pressure is obtained again; It is judged whether the second refrigerant pressure is less than the lower limit value of the preset pressure value range; When the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be closed.

6. The refrigerant supplement control method of the air conditioner according to claim 5, characterized by, After the step of "when the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, the electrically controlled valve is controlled to be closed", further comprising: When the air conditioner is in a running state, an air conditioner display is controlled to display an abnormal result of the refrigerant amount in the storage tank.

7. The refrigerant supplement control method of the air conditioner according to claim 2, characterized by, The refrigerant supplement control method further comprises: When the second refrigerant pressure is less than or equal to the lower limit value of the preset pressure value range, it is determined that the refrigerant in the storage tank is missing; When the air conditioner is in a running state, an air conditioner display is controlled to display an abnormal result of the refrigerant amount in the storage tank.

8. The refrigerant supplement control method of the air conditioner according to claim 1, characterized by, When the air conditioner further comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged in the pipeline to monitor the refrigerant temperature in the pipeline, and the second temperature sensor is arranged on the air conditioner to monitor the ambient temperature, the step of "obtaining the first refrigerant pressure in the pipeline" before comprises: obtaining the ambient temperature and the refrigerant temperature in the pipeline; determining the size of the refrigerant temperature and the ambient temperature and whether the refrigerant temperature is within a preset temperature value range; when the refrigerant temperature is equal to the ambient temperature and the refrigerant temperature is within a preset temperature value range, obtaining the first refrigerant pressure in the pipeline.

9. The refrigerant supplement control method of the air conditioner according to claim 8, characterized by, The refrigerant supplement control method further comprises: when the refrigerant temperature is not equal to the ambient temperature, and / or the first refrigerant temperature is not within a preset temperature value range, controlling the refrigerant system not to run.

10. The refrigerant supplement control method of the air conditioner according to claim 1, characterized by, The refrigerant supplement control method further comprises: when the first refrigerant pressure is greater than the upper limit value of the preset pressure value range, it is determined that the refrigerant amount in the circulation system is abnormal, and the electric control valve is controlled to remain in a closed state.

11. The refrigerant supplement control method of the air conditioner according to claim 10, characterized by, The refrigerant supplement control method further comprises: when the air conditioner is in a running state, controlling the air conditioner display to display the refrigerant amount in the circulation system is normal.

12. The refrigerant supplement control method of the air conditioner according to claim 1, characterized by, The refrigerant supplement control method further comprises: when the first refrigerant pressure is within a preset pressure value range, it is determined that the refrigerant amount in the circulation system is normal, and the electric control valve is controlled to remain in a closed state.

13. The refrigerant supplement control method of the air conditioner according to claim 12, characterized by, The refrigerant supplement control method further comprises: when the air conditioner is in a running state, controlling the air conditioner display to display the refrigerant amount in the circulation system is normal.

14. The refrigerant supplement control method of the air conditioner according to claim 1, characterized by, The refrigerant supplement control method further comprises: when the electric control valve is in an open state, controlling the air conditioner to be in a standby state; when the electric control valve is in a closed state, controlling the air conditioner to start running.

15. An air conditioner characterized by comprising: The air conditioner comprises a controller, and the controller is configured to be capable of executing the refrigerant supplement control method of the air conditioner according to any one of claims 1 to 14.

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