CN104566863A

CN104566863A - Method for detecting refrigerant leakage and air conditioner

Info

Publication number: CN104566863A
Application number: CN201410849594.3A
Authority: CN
Inventors: 庄华虎; 刘忠民
Original assignee: Guangdong Kelon Air Conditioner Co Ltd; Hisense Kelon Electrical Holdings Co Ltd
Current assignee: Guangdong Kelon Air Conditioner Co Ltd; Hisense Home Appliances Group Co Ltd
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2015-04-29
Also published as: WO2016107252A1

Abstract

The embodiment of the invention provides a method for detecting refrigerant leakage and an air conditioner, belongs to the field of air conditioner control, and aims at detecting refrigerant leakage without increasing the complete machine cost, as well as popularizing and applying the air conditioner. The method for detecting the refrigerant leakage comprises the steps of acquiring indoor environmental temperature and blowout temperature of an indoor air outlet of the air conditioner when a continuous working hours of a compressor of the air conditioner reaches the first preset length of the time; then determining whether a refrigerant of the air conditioner leaks according to the environmental temperature and the blowout temperature. With the adoption of the method, the refrigerant leakage of the air conditioner leaks can be detected.

Description

A kind of method and air-conditioning detecting coolant leakage

Technical field

The present invention relates to airconditioning control field, particularly relate to a kind of method and the air-conditioning that detect coolant leakage.

Background technology

At present, conventional domestic air conditioning comprises indoor set and off-premises station two parts, and whole air-conditioning system comprises compressor, outdoor heat exchanger, restriction device, indoor heat exchanger etc.Also there is refrigerant in air-conditioning system, the pressure-driven that refrigerant is produced by compressor, at whole system Inner eycle, and by carrying out heat exchange between indoor and outdoor surroundings, the object reaching refrigeration or heat, therefore how many direct refrigeration and heating effects affecting air-conditioning of refrigerant.But, in the installation or use procedure of air-conditioning, may occur that indoor and outdoor machine high-low pressure connection pipe nut does not seal the refrigerant tightly caused and leaks slowly for a long time, or off-premises station pipeline vibration and stress cause more greatly refrigerant pipeline cracking to cause refrigerant to leak rapidly, and then affect refrigeration and the heating effect of air-conditioning.

In prior art, usual needs are respectively at import and the outlet set temperature sensor of air-condition heat exchanger, be used for detecting the temperature of air-condition heat exchanger inflow point and exit refrigerant respectively, when the difference of the temperature of air-condition heat exchanger inflow point refrigerant and the temperature of exit refrigerant is more than or equal to special value, illustrate likely because secondary refrigerant leakage causes coolant quantity deficiency, and then to User Alarms, user can be convenient to and carry out in time checking or keeping in repair.But the method needs to arrange special temperature sensor, adds complete machine cost, is unfavorable for promoting the use of of air-conditioning.

Summary of the invention

Embodiments of the invention provide a kind of method and the air-conditioning that detect coolant leakage, on the basis not increasing complete machine cost, can realize the detection of coolant leakage, be conducive to promoting the use of of air-conditioning.

For achieving the above object, embodiments of the invention adopt following technical scheme:

On the one hand, the embodiment of the present invention provides a kind of method detecting coolant leakage, and for air-conditioning, described method comprises:

When the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtain the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning;

According to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

On the other hand, the embodiment of the present invention provides a kind of air-conditioning, and described air-conditioning comprises:

Acquiring unit, for when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtains the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning;

Confirmation unit, for according to described environment temperature and described blowout temperature, confirms whether the refrigerant of described air-conditioning occurs leaking.

On the one hand, the embodiment of the present invention provides a kind of air-conditioning, comprises indoor set and off-premises station, and described indoor set comprises indoor air outlet, and described off-premises station comprises compressor, and described air-conditioning also comprises:

First temperature sensor, the second temperature sensor and processor;

Described first temperature sensor is for detecting indoor environment temperature;

Described second temperature sensor is for detecting blowout temperature;

Described processor is used for when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtain the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning, according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

Embodiments of the invention provide a kind of method and the air-conditioning that detect coolant leakage, the method of described detection coolant leakage comprises: when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, first the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning is obtained, then according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.Compared to prior art, the embodiment of the present invention utilizes the existing sensor for obtaining environment temperature of air-conditioning and the sensor for obtaining blowout temperature to obtain environment temperature and blowout temperature respectively, when air conditioner coolant is sufficient and air-conditioning is used for heating, blowout temperature should be far longer than environment temperature, when the sufficient and air-conditioning of air conditioner coolant is for freezing, blowout temperature should be far smaller than environment temperature, and when leaking in a large number appears in air conditioner coolant, heat interchanger heat transfer effect is poor, no matter air-conditioning is carrying out heating or freezing, environment temperature is suitable with blowout temperature, therefore can environmentally temperature with blowout temperature above-mentioned rule, determine that leaking appears in air conditioner coolant.Because the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the existing sensor of air-conditioning can confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

A kind of process flow diagram detecting the method for coolant leakage that Fig. 1 provides for the embodiment of the present invention;

The process flow diagram of the method for the another kind detection coolant leakage that Fig. 2 provides for the embodiment of the present invention;

The structural representation of a kind of air-conditioning that Fig. 3 provides for the embodiment of the present invention;

The structural representation of the another kind of air-conditioning that Fig. 4 provides for the embodiment of the present invention;

The structural representation of another air-conditioning that Fig. 5 provides for the embodiment of the present invention;

The structural representation of another air-conditioning that Fig. 6 provides for the embodiment of the present invention;

The structural representation of the another kind of again air-conditioning that Fig. 7 provides for the embodiment of the present invention;

The structural representation of another air-conditioning again that Fig. 8 provides for the embodiment of the present invention;

The structural representation of the another kind of again air-conditioning that Fig. 9 provides for the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

The embodiment of the present invention provides a kind of method detecting coolant leakage, and for air-conditioning, as shown in Figure 1, described method comprises:

Step 101, when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtain the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning.

In practical application, the air-conditioning of standard needs configuration two sensors, a sensor is for obtaining environment temperature, so that air-conditioning judges that whether environment temperature is identical with the temperature that user sets, another sensor is for obtaining the blowout temperature of indoor air outlet, for monitor air-conditioning blowout cold/temperature of hot blast, in order to avoid the wind of blowout is crossed cold or overheated, affect users'comfort.Example, existing air-conditioning can pass through indoor return air sensor test indoor environment temperature, and then the temperature that the environment temperature recorded and user set can compare by air-conditioning, judges whether current environmental temperature reaches the design temperature of user.Simultaneously, existing air-conditioning can detect blowout temperature by blowout temperature sensor, such as, existing air-conditioning sets two preset temperature value usually, the second preset value corresponding when the first corresponding preset temperature value and air-conditioning heating when being respectively air conditioner refrigerating, when air conditioner refrigerating, by blowout temperature sensor test blowout temperature, described blowout temperature is the temperature at air-conditioner air outlet place, then blowout temperature and the first preset temperature value are compared, when blowing out temperature and being more than or equal to the first preset temperature value, air-conditioning normally uses, when blowing out temperature and being less than the first preset temperature value, compressor quits work, in order to avoid blowout temperature is too low, user feels colder, prevent heat interchanger from causing frosting when freezing because temperature is too low simultaneously, when air-conditioning heating, by blowout temperature sensor test blowout temperature, then blowout temperature and the second preset temperature value are compared, when blowing out temperature and being more than or equal to the second preset temperature value, compressor quits work, when blowing out temperature and being less than the second preset temperature value, air-conditioning normally uses, in order to avoid blowout temperature is too high, user feels hotter, prevents compressor operating hypertonia simultaneously.

Along with the unlatching of air-conditioning, compressor is just started working, now because compressor may not use for a long time, DeGrain when just having started to heat or freeze, now blowout temperature and environment temperature are natively suitable, now according to the magnitude relationship blowing out temperature and environment temperature, cannot judge that in heat interchanger, whether refrigerant is sufficient, therefore after needing compressor continuous firing duration to reach the first preset duration, then the magnitude relationship judging blowout temperature and environment temperature is gone.Wherein the first preset duration pre-sets, and can arrange as the case may be in practical application, the embodiment of the present invention does not limit this.

Step 102, according to described environment temperature and described blowout temperature, confirm the refrigerant of described air-conditioning whether occur leak.

When air conditioner coolant is sufficient and air-conditioning is used for heating, blowout temperature should be far longer than environment temperature, when the sufficient and air-conditioning of air conditioner coolant is for freezing, blowout temperature should be far smaller than environment temperature, and when leaking in a large number appears in air conditioner coolant, heat interchanger heat transfer effect is poor, no matter air-conditioning is carrying out heating or freezing, environment temperature is suitable with blowout temperature, therefore can the environmentally difference of temperature and blowout temperature or ratio, determines whether air conditioner coolant occurs leaking.

Example, when environmentally temperature and the ratio of blowout temperature, when determining whether air conditioner coolant occurs leaking, first first parameter preset corresponding with air-conditioning heating and second parameter preset corresponding with air conditioner refrigerating can be set, during air-conditioning heating, when environment temperature is greater than the first parameter preset with the ratio of blowout temperature, confirm that leaking appears in air conditioner coolant; When environment temperature is less than or equal to the first parameter preset with the ratio of blowout temperature, air-conditioning heating or refrigeration are described well, leaking does not appear in refrigerant; During air conditioner refrigerating, when environment temperature is less than or equal to the second parameter preset with the ratio of blowout temperature, confirm that leaking appears in air conditioner coolant; When environment temperature is greater than the second parameter preset with the ratio of blowout temperature, air-conditioning heating or refrigeration are described well, leaking does not appear in refrigerant.Wherein, environment temperature with blowout temperature can all with K (Kelvin) for unit, K is conventional thermodynamics unit, in practical application, can also use DEG C (degree Celsius) be unit, the embodiment of the present invention does not limit this.

So, because the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the existing sensor of air-conditioning to obtain environment temperature and blowout temperature respectively, then by the contrast to environment temperature and blowout temperature, confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

Optionally, according to described environment temperature and described blowout temperature, when confirming whether the refrigerant of described air-conditioning occurs leaking, first can judge whether the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to default value, if the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

If refrigerant is sufficient, the difference blowing out temperature and environment temperature during air conditioner refrigerating is negative, the difference blowing out temperature and environment temperature during air-conditioning heating is positive number, therefore needs the absolute value of the difference judging blowout temperature and environment temperature, then confirms whether refrigerant occurs leaking by judged result.Wherein default value can set in actual applications as the case may be, and the embodiment of the present invention does not limit this, example, when environment temperature with blowout temperature can all in units of K time, default value can be 3K or 2.5K.

Example, when air conditioner coolant is sufficient and air-conditioning is used for heating, blowout temperature should be far longer than environment temperature, if when the absolute value therefore blowing out the difference of temperature and environment temperature is less than default value, can determine that leaking appears in air conditioner coolant; When the sufficient and air-conditioning of air conditioner coolant is for freezing, blowout temperature should be far smaller than environment temperature, if when therefore environment temperature is less than default value with the absolute value of the difference of blowout temperature, can determine that leaking appears in air conditioner coolant.

Optionally, whether the absolute value of the blowout temperature to the difference judging described environment temperature and described blowout temperature that obtain the indoor air outlet of indoor environment temperature and described air-conditioning can be less than or equal to default value and form a period 1.Like this when confirming that leaking appears in the refrigerant of described air-conditioning, can first when the absolute value of the difference of described environment temperature and described blowout temperature be less than or equal to default value, repeat N described period 1, if the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning, wherein, can prefixed time interval be there is between adjacent two period 1, described N be more than or equal to 1 integer.

In practical application, may occur that the situation of the temperature instability of rear heat interchanger opened by air-conditioning, if therefore judge whether the refrigerant of air-conditioning occurs leaking by means of only the blowout temperature once obtained, there will be the situation of erroneous judgement, so usually whether the absolute value of the blowout temperature to the difference judging described environment temperature and described blowout temperature that obtain the indoor air outlet of indoor environment temperature and described air-conditioning can be less than or equal to default value to form the period 1, each period 1 obtains an environment temperature and blowout temperature, continuous N the period 1 of execution, namely N secondary environment temperature and blowout temperature is obtained continuously, judge whether the absolute value of the difference of the environment temperature that each period 1 obtains and blowout temperature is less than or equal to default value, when the absolute value of the blowout temperature obtained when each period 1 and the difference of environment temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of air-conditioning, the accuracy confirming result can be ensured like this, reduce erroneous judgement.Wherein stablize in compressor operating to ensure further, namely when heat interchanger heat exchange efficiency is stable, obtain blowout temperature, between adjacent twice period 1 can continuously not interval perform, also can there is the default time interval, the result between adjacent twice period 1 is independent of each other, and the wherein said default time interval pre-sets, set as the case may be in practical application, the embodiment of the present invention does not limit this.Meanwhile, if compressor operating is comparatively steady, when the heat exchange efficiency of heat interchanger is more even, between adjacent twice period 1, also prefixed time interval can not be there is.

Example, suppose that the first preset duration is 5 minutes, prefixed time interval is 5 seconds, and default value is 3, N is 3, namely repeats 3 period 1.After compressor continuous firing duration was more than 5 minutes, first time is by indoor return air the sensor environment temperature detected and the blowout temperature blowing out temperature sensor detection, and first time judges whether environment temperature is less than or equal to default value with the absolute value of the difference of blowout temperature, then the blowout temperature that after 5 seconds, second time is detected with blowout temperature sensor by the environment temperature that indoor return air sensor detects, and second time judges whether environment temperature is less than or equal to default value with the absolute value of the difference of blowout temperature, be separated by 5 seconds afterwards for the third time by indoor return air the sensor environment temperature detected and the blowout temperature blowing out temperature sensor detection, and third time judges whether environment temperature is less than or equal to default value with the absolute value of the difference of blowout temperature, namely 3 period 1 are repeated, when three secondary environment temperature are all less than or equal to default value with the absolute value of the difference of blowout temperature, can confirm that leaking appears in the refrigerant of described air-conditioning.

Optionally, when the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, described compressor can also be closed, then after the second preset duration, restarts described compressor; When described compressor continuous firing duration reaches described first preset duration, again repeat Q described period 1, described Q be more than or equal to 1 integer; If be wherein all less than or equal to default value from the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 is second round; Repeat M described second round, described M be more than or equal to 1 integer; If in each period 1 of each second round, the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, confirms that leaking appears in the refrigerant of described air-conditioning.

In practical application, when air-conditioning has just started to start, or the compressor of air-conditioning reopens after shutting down for a long time, even if now repeat N period 1, still likely because compressor operating is unstable when starting to test, heat interchanger heat exchange efficiency is unstable, make blowout temperature unstable, and then cause determination result to occur the phenomenon of erroneous judgement, therefore N period 1 can repeated, and the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is when being all less than or equal to default value, select temporary close compressor, then after the second preset duration, restart compressor, and after compressor continuous firing duration reaches the first preset duration, again repeat N period 1, when judging again to perform, described in each period 1, whether the absolute value of the difference of environment temperature and described blowout temperature is less than or equal to default value, when when again performing, the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is still all less than or equal to default value, illustrate that the probability of erroneous judgement is for the first time very little, in order to ensure that the accuracy rate confirmed can perform repeatedly continuously, when each result is all unified, confirm that leaking appears in air conditioner coolant, prevent erroneous judgement.

Example, if the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature all can be less than or equal to default value, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 forms a second round; Repeat M described second round, wherein M and Q pre-sets, and sets as the case may be in practical application, and the embodiment of the present invention does not limit this.After first time repeats N period 1, when the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, enter the execution of second round first time, like this when repeating 2 times second round, period 1 performs 3N time altogether, make the probability of erroneous judgement very little, almost negligible.

Further, after leaking appears in the refrigerant of the described air-conditioning of described confirmation, air-conditioning can also give the alarm.

Example, after judge can confirm that leaking appears in the refrigerant of air-conditioning through continuous print, illustrate that air-conditioning normally can not carry out work, therefore can give the alarm to user, so that user's on-call maintenance coolant adding.Wherein activating alarm has various ways, can arrange alarm lamp on air-conditioning, when confirming that revealing appears in refrigerant, can light described alarm lamp, warning user; Or can install hummer on air-conditioning, when confirming that revealing appears in refrigerant, knowledge hummer sends buzzing, warning user.In practical application, after leaking appears in the refrigerant of the described air-conditioning of described confirmation, air-conditioning can also first close compressor, in order to avoid compressor continuous service when cold medium shortage causes irreversible damage to compressor.

Detect described environment temperature by the indoor return air sensor of described air-conditioning, detect described blowout temperature by the blowout temperature sensor of described air-conditioning.

Further, after whether the absolute value of the difference judging described environment temperature and described blowout temperature is less than or equal to default value, described method also comprises: when the absolute value of the difference of described environment temperature and described blowout temperature is greater than described default value, record the cumulative operation time of described compressor; When the cumulative operation time of described compressor reaches the 3rd preset duration, judge whether current described compressor continuous firing duration reaches described first preset duration; If the compressor continuous firing duration of current described air-conditioning reaches the first preset duration, obtain described environment temperature and described blowout temperature, and according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

In practical application, in the process of compressor operating, refrigerant may be caused to leak rapidly because off-premises station pipeline vibration and stress cause more greatly refrigerant pipeline to ftracture, therefore when confirming that leaking does not appear in refrigerant, the cumulative operation time of recording compressed machine can be started, when the cumulative operation time of compressor reaches the 3rd preset duration, illustrate that compressor has worked the long period, very possible meeting is because off-premises station pipeline vibration and stress cause more greatly refrigerant pipeline to ftracture, refrigerant is caused to occur leaking, therefore now whether can occur that leakage detects to air conditioner coolant.In order to ensure to obtain blowout temperature when compressor steady operation, first can also judge whether current described compressor continuous firing duration reaches described first preset duration, if the compressor continuous firing duration of current described air-conditioning reaches the first preset duration, perform the described period 1, namely whether refrigerant is occurred that leakage detects.

Optionally, when determining that leaking does not appear in air conditioner coolant, the cumulative activation duration of compressor can be reset, then recording compressed machine cumulative operation time is continued, when the cumulative operation time of compressor reaches the 3rd preset duration, again can determine whether refrigerant occurs leaking, so not only when air-conditioning is just opened, refrigerant is detected, in the operational process of air-conditioning, real-time detection is carried out to refrigerant simultaneously, guarantee that refrigerant occurs to notify user in time when leaking, in order to avoid compressor for a long time or refrigerant less at coolant quantity disappearance continuous running, compressor is caused damage.

Embodiments of the invention provide a kind of method detecting coolant leakage, first when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtain the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning, then according to described environment temperature and described blowout temperature, confirm that leaking appears in the refrigerant of described air-conditioning.Compared to prior art, because the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the existing sensor of air-conditioning can confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

The embodiment of the present invention provides a kind of method detecting coolant leakage, as shown in Figure 2, the invention process example assumes period 1 repeats three times, repeat three second round, the first preset duration is 5 minutes, and the prefixed time interval existed between adjacent twice period 1 is 5 seconds, second preset duration is 3 minutes, default value is 2.5K (Kelvin), and the embodiment of the present invention is only exemplary illustration, does not make restriction to the value of above-mentioned parameter.Simultaneously, the embodiment of the present invention obtains environment temperature by indoor return air sensor, obtain blowout temperature by blowout temperature sensor, can also be obtained environment temperature and blowout temperature in practical application respectively by other sensors arranged in air-conditioning, the embodiment of the present invention is not construed as limiting this.Concrete, the method for described detection coolant leakage comprises:

Step 201, open air-conditioning, compressor starts work, long-time during the continuous firing of recording compressed machine, N equals 0, M and equals 0, performs step 202.

Along with the unlatching of air-conditioning, compressor is just started working, now because compressor does not use for a long time, when just having started refrigeration or heated, blowout temperature is natively suitable with environment temperature, now according to the magnitude relationship blowing out temperature and environment temperature, cannot judge that in compressor, whether refrigerant is sufficient, therefore the continuous firing duration of recording compressed machine is needed, when the continuous firing duration of compressor meets pre-conditioned, judge whether refrigerant occurs leaking, and can improve the accuracy of judged result by obtaining environment temperature and blowing out temperature.

Needs illustrate, heat because air-conditioning there will be in operational process or freeze, air-supply and defrosting isotype, when air-conditioning work is in air-supply and defrosting mode, compressor does not work, and therefore blowout temperature and environment temperature are more or less the same, and now whether can not occur that leakage judges to refrigerant.

Step 202, when the continuous firing duration of described compressor reaches the first preset duration, obtain air-conditioning indoor return air sensor detect environment temperature and air-conditioning blowout temperature sensor detect blowout temperature, perform step 203.

In practical application, after needing compressor continuous firing first preset duration, then go the magnitude relationship judging blowout temperature and environment temperature.Wherein the first preset duration pre-sets, and can arrange as the case may be in practical application, the embodiment of the present invention does not limit this.

In practical application, existing air-conditioning needs to detect indoor environment temperature, then the temperature that the environment temperature recorded and user set is compared, judges whether current environmental temperature reaches the design temperature of user.Simultaneously, existing air-conditioning needs to detect blowout temperature, in case air outlet temperature is too low or too high, affect users'comfort, avoid heat interchanger to cause frosting or compressor operating hypertonia because temperature is too low simultaneously, therefore, be now air-conditioned standard configuration for the sensor of testing environment temperature and the sensor for detecting blowout temperature, the embodiment of the present invention obtains environment temperature for indoor return air sensor and blowout temperature sensor and blowout temperature is described.In the embodiment of the present invention, environment temperature and blowout temperature are all in units of K.

Step 203, judge whether the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to 2.5K, when the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to 2.5K, perform step 204; When the absolute value of the difference of described environment temperature and described blowout temperature is greater than 2.5K, perform step 209.

If refrigerant is sufficient, the difference blowing out temperature and environment temperature during air conditioner refrigerating is negative, the difference blowing out temperature and environment temperature during air-conditioning heating is positive number, therefore the absolute value of the difference judging blowout temperature and environment temperature is needed, when the absolute value of the difference blowing out temperature and environment temperature is less than 2.5K, illustrate that blowout temperature and environment temperature are more or less the same.But when refrigerant abundance, air-conditioning is when freezing, blowout temperature should be far smaller than environment temperature, air-conditioning is when heating, blowout temperature should be far longer than environment temperature, that is, when refrigerant abundance, when air-conditioning normally works, the absolute value of the difference of blowout temperature and environment temperature should be comparatively large, if when the absolute value of the difference of blowout temperature and environment temperature is less than 2.5K, illustrates that blowout temperature is close to environment temperature, this is because a large amount of leakage has appearred in air conditioner coolant, and compressor cannot freeze normally or heat and cause.Wherein 2.5K sets as the case may be, and the embodiment of the present invention does not limit this.

Step 204, N add 1, perform step 205.

Step 205, judge whether N equals 3, when N equals 3, perform step 206; When N is not equal to 3, after 5 seconds, perform step 202.

In practical application, may occur that the situation of rear compressor operating instability opened by air-conditioning, if therefore judge whether the refrigerant of air-conditioning occurs leaking, and there will be the situation of erroneous judgement, so usually above-mentioned steps can be repeated 3 times by means of only the blowout temperature once obtained.Example, whether the blowout temperature obtaining the indoor air outlet of indoor environment temperature and described air-conditioning can be less than or equal to default value with the absolute value of the difference judging described environment temperature and described blowout temperature and form the period 1, parameters N, often execute a period 1, perform N and add 1, when N equals 3, illustrate that the period 1 completes three times, and the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to 2.5K, leakage can may be there is by preliminary judgement refrigerant like this.

But when repeating three period 1, the work of possible compressor is also unstable, or compressor does not carry out heating or refrigeration work completely, blowout temperature may not be very high or very low, even if now the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to 2.5K, also likely do not caused by coolant leakage, perform above-mentioned steps three times so can circulate in practical application, reduce False Rate.

Step 206, judge whether M equals 3, when M is not equal to 3, perform step 207; When M equals 3, perform step 211.

In practical application, in rational scope, repeatedly can repeat the period 1, example, period 13 times can be performed at every turn, perform M time continuously, when M equals 3, illustrate and perform period 19 times, now occur that the probability of erroneous judgement is very little.Therefore, after repeating period 1 three times, in order to ensure the execution number of times of period 1, also need to judge whether M equals predetermined threshold value, in the embodiment of the present invention, predetermined threshold value is 3 at every turn.

Step 207, M add 1, perform step 208.

Step 208, close described compressor after three minutes and restart described compressor, perform step 202.

After repeating period 1 N time, in the embodiment of the present invention, N is 3, if the absolute value of each described environment temperature of period 1 and the difference of described blowout temperature is all less than or equal to 2.5K, illustrate that leaking may appear in refrigerant, but this result is also likely compressor operating, and instability causes, can not determine that leaking appears in refrigerant completely, therefore, when the absolute value of the described environment temperature of each period 1 and the difference of described blowout temperature is all less than or equal to 2.5K, can close compressor 3 minutes, then compressor is reopened, and then acquisition environment temperature and blowout temperature judge again.

Step 209, compressor normally work, the cumulative operation time of recording compressed machine, perform step 210.

When environment temperature is greater than 2.5K with the absolute value of the difference of blowout temperature, illustrate that the difference of blowout temperature and environment temperature is larger, further illustrate compressor can heat normally or refrigeration work, namely refrigerant is sufficient, and therefore compressor can proceed normal work.

Step 210, when the cumulative operation time of described compressor reaches the 3rd preset duration, judge whether current described compressor continuous firing duration reaches described first preset duration, if the compressor continuous firing duration of current described air-conditioning reaches the first preset duration, perform step 202; If the current compressor continuous firing duration when described air-conditioning is less than the first preset duration, perform step 209.

In practical application, in the process of compressor operating, refrigerant may be caused to leak rapidly because off-premises station pipeline vibration and stress cause more greatly refrigerant pipeline to ftracture, therefore when confirming that leaking does not appear in refrigerant, the cumulative operation time of recording compressed machine can be started, when the cumulative operation time of compressor reaches the 3rd preset duration, illustrate that compressor has worked the long period, very possible meeting is because off-premises station pipeline vibration and stress cause more greatly refrigerant pipeline to ftracture, refrigerant is caused to occur leaking, therefore now again whether can occur that leakage detects to air conditioner coolant.In order to ensure to obtain blowout temperature when compressor steady operation, first can also judge whether current described compressor continuous firing duration reaches described first preset duration, when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, perform step 202, namely whether refrigerant is occurred that leakage detects.

Step 211, light alarm lamp.

If the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature all can be less than or equal to default value, closing described compressor to repeating N described period 1 is for the second time a second round, after continuous N time repeats second round, if in each period 1 of each second round, the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, now False Rate is lower, can confirm that leaking appears in the refrigerant of described air-conditioning completely, therefore alarm lamp can be lighted, warning user coolant leakage, so that user carries out on-call maintenance to air-conditioning and supplements refrigerant.In practical application, also can first close compressor, in order to avoid compressor continuous service when cold medium shortage causes damage to compressor.

Compared to prior art, the embodiment of the present invention utilizes the existing sensor of air-conditioning to obtain environment temperature and blowout temperature respectively, and when air conditioner coolant is sufficient and air-conditioning is used for heating, blowout temperature should be far longer than environment temperature, therefore according to above-mentioned rule, can determine that leaking appears in air conditioner coolant.Because the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the existing sensor of air-conditioning can confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

The embodiment of the present invention provides a kind of air-conditioning 30, and as shown in Figure 3, described air-conditioning comprises:

Acquiring unit 301, for when the compressor continuous firing duration of described air-conditioning 30 reaches the first preset duration, obtains the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning 30.

Needs illustrate, for obtaining the sensor of environment temperature and being the standard configuration of existing air-conditioning 30 for obtaining the sensor blowing out temperature.

Along with the unlatching of air-conditioning 30, compressor is just started working, now because compressor does not use for a long time, blowout temperature is natively suitable with environment temperature, now according to the magnitude relationship blowing out temperature and environment temperature, cannot judge that whether refrigerant is sufficient, after therefore needing compressor continuous firing duration first preset duration, then go the magnitude relationship judging blowout temperature and environment temperature.Wherein the first preset duration pre-sets, and can arrange as the case may be in practical application, the embodiment of the present invention does not limit this.

Confirmation unit 302, for according to described environment temperature and described blowout temperature, confirms whether the refrigerant of described air-conditioning occurs leaking.

When air conditioner coolant is sufficient and air-conditioning is used for heating, blowout temperature should be far longer than environment temperature, when the sufficient and air-conditioning of air conditioner coolant is for freezing, blowout temperature should be far smaller than environment temperature, and when leaking in a large number appears in air conditioner coolant, compressor cannot effectively work, no matter air-conditioning is carrying out heating or freezing, environment temperature is suitable with blowout temperature, therefore can the environmentally difference of temperature and blowout temperature or ratio, determines whether air conditioner coolant occurs leaking.

Optionally, whether described confirmation unit 302 is less than or equal to default value specifically for the absolute value of the difference judging described environment temperature and described blowout temperature, if the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning 30.

Optionally, whether being less than or equal to default value from blowout temperature to the absolute value of the difference judging described environment temperature and described blowout temperature of the indoor air outlet obtaining indoor environment temperature and described air-conditioning 30 is a period 1.

As shown in Figure 4, described air-conditioning 30 also comprises the first performance element 303, for repeating N described period 1, described N be more than or equal to 1 integer; Described confirmation unit 302 specifically for: if the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, confirm described air-conditioning 30 refrigerant occur leak.

Optionally, whether being less than or equal to default value from blowout temperature to the absolute value of the difference judging described environment temperature and described blowout temperature of the indoor air outlet obtaining indoor environment temperature and described air-conditioning is the period 1.

As shown in Figure 5, described air-conditioning 30 also comprises the second performance element 304, for repeating N described period 1, described N be more than or equal to 1 integer; If the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, close described compressor; After second preset duration, restart described compressor; When described compressor continuous firing duration reaches described first preset duration, again repeat Q described period 1, described Q be more than or equal to 1 integer; If be wherein all less than or equal to default value from the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 is second round; Repeat M described second round, described M be more than or equal to 1 integer;

If described confirmation unit 302 is specifically in each period 1 of each second round, the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, confirms that leaking appears in the refrigerant of described air-conditioning.

Further, as shown in Figure 6, described air-conditioning 30 also comprises:

Control module 305, gives the alarm after occurring leaking at the refrigerant of the described air-conditioning 30 of described confirmation.

Optionally, air-conditioning 30 can detect described environment temperature by the indoor return air sensor of described air-conditioning, detects described blowout temperature by the blowout temperature sensor of described air-conditioning.

Further, as shown in Figure 7, described air-conditioning 30 also comprises:

Record cell 306, when the absolute value for the difference when described environment temperature and described blowout temperature is greater than described default value, records the cumulative operation time of described compressor.

Judging unit 307, for when the cumulative operation time of described compressor reaches the 3rd preset duration, judges whether current described compressor continuous firing duration reaches described first preset duration.

If described acquiring unit 301 also reaches the first preset duration for the compressor continuous firing duration of current described air-conditioning, obtain described environment temperature and described blowout temperature;

Described confirmation unit 302 also for according to described environment temperature and described blowout temperature, confirms whether the refrigerant of described air-conditioning occurs leaking.

Embodiments of the invention provide a kind of air-conditioning, first when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtained the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning by acquiring unit, then confirm that leaking appears in the refrigerant of described air-conditioning by confirmation unit.Compared to prior art, because the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the existing sensor of air-conditioning can confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

The embodiment of the present invention provides a kind of air-conditioning 80, comprises indoor set and off-premises station, and described indoor set comprises indoor air outlet, and described off-premises station comprises compressor, and as shown in Figure 8, described air-conditioning 80 also comprises:

First temperature sensor 801, second temperature sensor 802 and processor 803;

Described first temperature sensor 801 is for detecting indoor environment temperature;

Described second temperature sensor 802 is for detecting blowout temperature;

Described processor 803 is for when the compressor continuous firing duration of described air-conditioning 80 reaches the first preset duration, obtain the blowout temperature of the indoor air outlet of indoor environment temperature and described air-conditioning 80, according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning 80 occurs leaking.

So, air-conditioning described in the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the sensor of the sensor of the existing testing environment temperature of air-conditioning and detection blowout temperature can confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

Further, described processor 803 specifically for:

Judge whether the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to default value;

If the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning 80.

Further, whether being less than or equal to default value from blowout temperature to the absolute value of the difference judging described environment temperature and described blowout temperature of the indoor air outlet obtaining indoor environment temperature and described air-conditioning 80 is the period 1;

Described processor 803 specifically for repeating N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning 80.

Preferably, whether being less than or equal to default value from blowout temperature to the absolute value of the difference judging described environment temperature and described blowout temperature of the indoor air outlet obtaining indoor environment temperature and described air-conditioning 80 is the period 1;

If the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, close described compressor;

After second preset duration, restart described compressor;

When described compressor continuous firing duration reaches described first preset duration, again repeat Q described period 1, described Q be more than or equal to 1 integer;

If be wherein all less than or equal to default value from the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 is second round;

Repeat M described second round, described M be more than or equal to 1 integer;

If in each period 1 of each second round, the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, confirms that leaking appears in the refrigerant of described air-conditioning 80.

Optionally, described processor 803 also for after the refrigerant appearance leakage of the described air-conditioning 80 of described confirmation, cuts out described compressor.

Optionally, as shown in Figure 9, described air-conditioning 80 also comprises warning horn 804;

Described processor 803 also gives the alarm for controlling described warning horn 804 after the refrigerant appearance leakage of the described air-conditioning of described confirmation 80.

As shown in Figure 9, described first temperature sensor 801 is for being arranged on the indoor return air sensor of described air-conditioning 80 return air inlet;

Described second temperature sensor 802 is for being arranged on the blowout temperature sensor of described air-conditioning 80 air outlet.

Further, when described processor 803 is also greater than described default value for the absolute value of the difference when described environment temperature and described blowout temperature, the cumulative operation time of described compressor is recorded;

When the cumulative operation time of described compressor reaches the 3rd preset duration, judge whether current described compressor continuous firing duration reaches described first preset duration;

If the compressor continuous firing duration of current described air-conditioning 80 reaches the first preset duration, obtain described environment temperature and described blowout temperature, and according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning 80 occurs leaking.

Embodiments of the invention provide a kind of air-conditioning, first when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtain the blowout temperature of environment temperature and described air-conditioning, then environmentally temperature and blowout temperature confirm that leaking appears in the refrigerant of described air-conditioning.Compared to prior art, because the air-conditioning described in the embodiment of the present invention does not need respectively at import and the outlet set temperature sensor of air-condition heat exchanger, but utilize the existing sensor of air-conditioning can confirm whether refrigerant leaks, reduce complete machine cost, be conducive to promoting the use of of air-conditioning.

Those skilled in the art can be well understood to, and for convenience and simplicity of description, the device of foregoing description and the specific works process of unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.

In several embodiments that the application provides, should be understood that disclosed apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit comprises, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.

Claims

1. detect a method for coolant leakage, for air-conditioning, it is characterized in that, described method comprises:

2., according to described method according to claim 1, it is characterized in that, described according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning occurs that leakage comprises:

If the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

3., according to described method according to claim 2, it is characterized in that,

Whether being less than or equal to default value from blowout temperature to the absolute value of the difference judging described environment temperature and described blowout temperature of the indoor air outlet obtaining indoor environment temperature and described air-conditioning is the period 1;

If be less than or equal to default value at the absolute value of the difference of described environment temperature and described blowout temperature, before confirming that leaking appears in the refrigerant of described air-conditioning, described method also comprises:

Repeat N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of described environment temperature and described blowout temperature is less than or equal to default value, confirm that the refrigerant of described air-conditioning occurs that leakage is specially:

If the absolute value of the difference of environment temperature described in each period 1 and described blowout temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

4., according to described method according to claim 2, it is characterized in that,

Repeat N described period 1, described N be more than or equal to 1 integer;

After second preset duration, restart described compressor;

If in each period 1 of each second round, the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, confirms that leaking appears in the refrigerant of described air-conditioning.

5. the method according to described claim 2 to 4 any one claim, is characterized in that, after leaking appears in the refrigerant of the described air-conditioning of described confirmation, described method also comprises:

Described air-conditioning gives the alarm.

6. the method according to described Claims 1-4 any one claim, is characterized in that,

7. according to described method according to claim 2, it is characterized in that, after whether the absolute value of the difference judging described environment temperature and described blowout temperature is less than or equal to default value, described method also comprises:

When the absolute value of the difference of described environment temperature and described blowout temperature is greater than described default value, record the cumulative operation time of described compressor;

If the compressor continuous firing duration of current described air-conditioning reaches the first preset duration, obtain described environment temperature and described blowout temperature, and according to described environment temperature and described blowout temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

8. an air-conditioning, is characterized in that, described air-conditioning comprises:

9., according to described air-conditioning according to claim 8, it is characterized in that, described confirmation unit specifically for:

If the absolute value of the difference of described environment temperature and described blowout temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

10., according to described air-conditioning according to claim 9, it is characterized in that,

Whether being less than or equal to default value from blowout temperature to the absolute value of the difference judging described environment temperature and described blowout temperature of the indoor air outlet obtaining indoor environment temperature and described air-conditioning is a period 1;

Described air-conditioning also comprises the first performance element, for repeating N described period 1, described N be more than or equal to 1 integer;

Described confirmation unit specifically for:

11., according to described air-conditioning according to claim 9, is characterized in that,

Described air-conditioning also comprises the second performance element, for repeating N described period 1, described N be more than or equal to 1 integer;

After second preset duration, restart described compressor;

Described confirmation unit specifically for:

12. air-conditionings according to described claim 9 to 11 any one claim, it is characterized in that, described air-conditioning also comprises:

Control module, gives the alarm after occurring leaking at the refrigerant of the described air-conditioning of described confirmation.

13. air-conditionings according to described claim 8 to 11 any one claim, is characterized in that,

14., according to described air-conditioning according to claim 9, is characterized in that, described air-conditioning also comprises:

Record cell, when the absolute value for the difference when described environment temperature and described blowout temperature is greater than described default value, records the cumulative operation time of described compressor;

Judging unit, for when the cumulative operation time of described compressor reaches the 3rd preset duration, judges whether current described compressor continuous firing duration reaches described first preset duration;

If described acquiring unit also reaches the first preset duration for the compressor continuous firing duration of current described air-conditioning, obtain described environment temperature and described blowout temperature;

Described confirmation unit also for according to described environment temperature and described blowout temperature, confirms whether the refrigerant of described air-conditioning occurs leaking.

15. 1 kinds of air-conditionings, comprise indoor set and off-premises station, and described indoor set comprises indoor air outlet, and described off-premises station comprises compressor, it is characterized in that, described air-conditioning also comprises:

First temperature sensor, the second temperature sensor and processor;

Described second temperature sensor is for detecting blowout temperature;

16., according to described air-conditioning according to claim 15, is characterized in that, described processor specifically for:

17., according to described air-conditioning according to claim 16, is characterized in that,

Described processor specifically for repeating N described period 1, described N be more than or equal to 1 integer;

18., according to described air-conditioning according to claim 16, is characterized in that,

After second preset duration, restart described compressor;

19. air-conditionings according to described claim 16 to 18 any one claim, it is characterized in that, described air-conditioning also comprises warning horn;

Described processor also gives the alarm for controlling described warning horn after the refrigerant appearance leakage of the described air-conditioning of described confirmation.

20. air-conditionings according to described claim 15 to 18 any one claim, is characterized in that,

Described first temperature sensor is the indoor return air sensor being arranged on described return air inlet for air-conditioner;

Described second temperature sensor is the blowout temperature sensor being arranged on described air-conditioner air outlet.

21., according to described air-conditioning according to claim 16, is characterized in that,

When described processor is also greater than described default value for the absolute value of the difference when described environment temperature and described blowout temperature, record the cumulative operation time of described compressor;