阅读说明：本技术 一种冷媒泄漏检测方法及空调器 (Refrigerant leakage detection method and air conditioner ) 是由 白韡 许真鑫 于 2018-08-21 设计创作，主要内容包括：本发明提供了一种冷媒泄漏检测方法及空调器,所述冷媒泄漏检测方法包括以下步骤：S1：空调器运行,获取压缩机的当前运行状态,执行相应的一级判定,判断是否满足一级判定条件；若是,发生冷媒泄漏；若否,执行步骤S2；S2：判断是否满足预设的检测触发条件；若是,执行步骤S3；若否,重新执行步骤S2；S3：执行相应触发条件下的二级判定,并判断是否满足二级判定条件；若是,发生冷媒泄漏；若否,执行步骤S4；S4：执行相应的三级判定,并判断是否满足三级判定条件；若是,发生冷媒泄漏；若否,重新执行步骤S2。本发明所述的冷媒检测方能够提高冷媒检测的有效性,并增强整个空调系统的安全性；即该方法能够达到准确判断、节能和安全的综合效益。(The invention provides a refrigerant leakage detection method and an air conditioner, wherein the refrigerant leakage detection method comprises the following steps: s1: the air conditioner operates to obtain the current operating state of the compressor, execute corresponding first-stage judgment and judge whether a first-stage judgment condition is met; if yes, refrigerant leakage occurs; if not, go to step S2; s2: judging whether a preset detection trigger condition is met; if yes, go to step S3; if not, re-executing the step S2; s3: executing secondary judgment under corresponding trigger conditions, and judging whether secondary judgment conditions are met; if yes, refrigerant leakage occurs; if not, go to step S4; s4: executing corresponding three-level judgment and judging whether a three-level judgment condition is met; if yes, refrigerant leakage occurs; if not, step S2 is executed again. The refrigerant detection method can improve the effectiveness of refrigerant detection and enhance the safety of the whole air conditioning system; namely, the method can achieve the comprehensive benefits of accurate judgment, energy conservation and safety.)

1. A refrigerant leakage detection method is characterized by comprising the following steps:

s1: the air conditioner operates to obtain the current operating state of the compressor, execute corresponding first-stage judgment and judge whether a first-stage judgment condition is met; if yes, refrigerant leakage occurs; if not, go to step S2;

s2: judging whether a preset detection trigger condition is met; if yes, go to step S3; if not, re-executing the step S2;

s3: executing secondary judgment under corresponding trigger conditions, and judging whether secondary judgment conditions are met; if yes, refrigerant leakage occurs; if not, go to step S4;

s4: executing corresponding three-level judgment and judging whether a three-level judgment condition is met; if yes, refrigerant leakage occurs; if not, step S2 is executed again.

2. The refrigerant leakage detection method as claimed in claim 1, wherein the step S1 includes the steps of:

s11: the air conditioner runs, after the compressor is started and runs stably for the first time, the pressure acquisition device detects the pipeline pressure value P of the air suction pipeline of the compressor in the current running state₁And obtaining a preset pressure threshold value P corresponding to the current operation state₀；

S12: the pressure value P of the pipeline is measured₁And a pressure threshold value P₀Comparing to determine whether P is present₁＜P₀(ii) a If yes, refrigerant leakage occurs; if not, go to step S2.

3. The refrigerant leakage detection method according to claim 1, wherein the detection trigger conditions in S2 include a first trigger condition and a second trigger condition, and the first trigger condition and the second trigger condition are executed independently and in parallel.

4. The refrigerant leakage detection method according to claim 3, wherein the first trigger condition is: ambient temperature T_{Ring (C)}With a temperature threshold T₀Equal; the second trigger condition is as follows: the sensor detects a marker component in the air.

5. The refrigerant leakage detection method according to claim 1, wherein the trigger condition is: ambient temperature T_{Ring (C)}With a temperature threshold T₀And the sensor detects the marker component in air.

6. The refrigerant leakage detection method according to any one of claims 1 to 5, wherein the step S3 includes the steps of:

s31: detecting compressor current I₁Monitoring reception by infrared sensorWavelength data of each molecular component contained in a refrigerant filled in the refrigerating pipe;

s32: judging whether the wavelength data of each molecular component is received at the same time; if yes, go to step S33, otherwise go to step S31;

s33: acquiring the concentration W of each molecular component in the total volume of the molecular components according to the received wavelength data of each molecular component; by compressor current I₁And an upper current limit value I of the compressor_maxCalculating the current difference DeltaI₁＝|I_max-I₁|；

S34: the difference value of the currents is delta I₁And current threshold Δ I₀Comparing W with a concentration threshold [ W ]₀，W₁]Comparing; judging whether the delta I exists₁>ΔI₀And W is as [ W ]₀，W₁](ii) a If yes, refrigerant leakage occurs; if not, go to step S4.

7. The refrigerant leakage detection method according to any one of claims 1 to 5, wherein the step S4 includes the steps of:

s42: detecting actual temperature T of indoor heat exchanger with minimum frequency node of air conditioner₁Maximum frequency node indoor heat exchanger actual measurement temperature T₂And calculating the temperature difference amplitude Delta T between the two₁；

S43: will be the temperature difference amplitude Delta T₁And a temperature difference threshold value delta T₀Comparing to determine whether Δ T₁＞ΔT₀(ii) a If yes, refrigerant leakage occurs; if not, go to step S2.

8. The refrigerant leakage detection method according to any one of claims 1 to 5, wherein the step S4 includes the steps of:

s41: starting a reading function of a counter, and performing reading zeroing; starting a timing function of a timer, and resetting time to zero;

s42: detecting actual temperature T of indoor heat exchanger with minimum frequency node of air conditioner₁Maximum frequency node indoor heat exchanger actual measurement temperature T₂And calculating the temperature therebetweenThe difference amplitude Δ T₁；

S43: will be the temperature difference amplitude Delta T₁And a temperature difference threshold value delta T₀Comparing to determine whether Δ T₁＞ΔT₀(ii) a If yes, executing steps S44-S47; if not, go to step S2;

s44: the reading value of the counter is added with '1';

s45: judging whether the counting value reaches a counting threshold value m; if yes, go to step S46; if not, go to step S42;

s46: the timer stops timing and obtains the timer reading t₁；

S47: read the timer t₁With a preset time threshold t₀Comparing to determine whether t is present₁<t₀(ii) a If yes, refrigerant leakage occurs; if not, go to step S2.

9. The refrigerant leakage detection method according to claim 1, wherein after determining that the refrigerant is leaked, the step S5 is executed: executing the set refrigerant leakage protection operation;

the step S5 includes: s51: disconnecting the power supply of the air conditioner;

s52: after a preset time interval, acquiring the concentration Q of the refrigerant outside the refrigerant system₁；

S53: the concentration Q of refrigerant outside the refrigerant system₁And a refrigerant concentration threshold Q₀Comparing to determine whether Q is present₁>Q₀(ii) a If so, disconnecting the power supply of the room where the air conditioner is located; if not, step S52 is executed.

10. An air conditioner, characterized in that the air conditioner comprises the refrigerant leakage detection method as claimed in any one of claims 1 to 9.