CN111878915A - Dehumidifier and refrigerant leakage control method thereof - Google Patents
Dehumidifier and refrigerant leakage control method thereof Download PDFInfo
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 description 7
- 238000007791 dehumidification Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010257 thawing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a dehumidifier and a refrigerant leakage control method thereof, wherein the method comprises the following steps: judging whether the compressor continuously operates for a first time period or not; if so, judging whether the continuous second time duration meets the environment temperature-the evaporator tube temperature is less than or equal to a first temperature difference value; if yes, entering a refrigerant leakage conventional protection mode; when the first exit condition is met, the refrigerant leakage conventional protection mode is exited, and whether the continuous second time duration is met or not is judged again, wherein the ambient temperature-the temperature of the evaporator tube is less than or equal to a first temperature difference value; judging whether to enter a refrigerant leakage conventional protection mode for n times continuously, wherein n is more than or equal to 3; and if so, entering a refrigerant leakage final protection mode. Therefore, the influence caused by further leakage of the refrigerant is avoided, the related risks of the dehumidifier after the refrigerant is leaked are solved, the compressor stops running after the refrigerant of the dehumidifier is leaked to a certain amount, the whole dehumidifier enters a refrigerant leakage protection program, and extreme conditions such as fire disasters are prevented.
Description
Technical Field
The invention relates to the field of dehumidifiers, in particular to a dehumidifier and a refrigerant leakage control method thereof.
Background
The existing dehumidifier generally has no refrigerant leakage protection program, and when the dehumidifier runs continuously for a long time, a small amount of the dehumidifier inevitably causes refrigerant leakage due to deviation in the production process and corrosion of the environment. When the leakage of the refrigerant in the dehumidifier is more or completely, the dehumidifier compressor can still continue to operate for a long time, the temperature of the compressor can rise at the moment, and the dehumidifier has the risk of igniting plastic parts. The design makes the compressor stop running after the dehumidifier refrigerant leaks to a certain amount by drawing up a new dehumidifier refrigerant leakage rule, thereby avoiding the risk of igniting plastic parts
The service environment of current dehumidifier generally is environment such as garage, basement, library, precision instruments room, and mostly is continuous permanent operation when the dehumidifier uses. The refrigerant leakage phenomenon is difficult to avoid in the practical use process of the dehumidifier due to the reasons of assembly, transportation and the like. When the refrigerant in the dehumidifier leaks more or completely, the dehumidifier has the following risks:
1. when the refrigerant leaks, the compressor in the dehumidifier is still in continuous operation, so that the exhaust temperature is high, the current is low, the compressor protector loses the protection effect in the operation, the compressor is possibly burnt at high temperature due to long-term continuous operation, the hidden danger of fire is caused, and great loss is caused to users
2. When the compressor continues to operate for a long time after the refrigerant in the compressor leaks, the refrigerating machine oil in the compressor can be carbonized, and the normal performance of the system is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling leakage of refrigerant in a dehumidifier.
The refrigerant leakage control method of the dehumidifier of the embodiment of the invention comprises the following steps: judging whether the compressor continuously operates for a first time period or not; if so, judging whether the continuous second time duration meets the environment temperature-the evaporator tube temperature is less than or equal to a first temperature difference value; if yes, entering a refrigerant leakage conventional protection mode; when the first exit condition is met, the refrigerant leakage conventional protection mode is exited, and whether the continuous second time duration is met or not is judged again, wherein the ambient temperature-the temperature of the evaporator tube is less than or equal to a first temperature difference value; judging whether to enter a refrigerant leakage conventional protection mode for n times continuously, wherein n is more than or equal to 3; and if so, entering a refrigerant leakage final protection mode.
Therefore, when the difference value between the ambient temperature and the evaporator tube temperature in the continuous second time period is smaller than or equal to the first temperature difference value, the refrigerant leakage conventional protection mode is entered, when the refrigerant leakage is relieved and the first exit condition is met, the refrigerant leakage conventional protection mode exits, if the number of times of entering and exiting the refrigerant leakage protection mode reaches the set number of times, the refrigerant leakage final protection mode is entered, the influence caused by further leakage of the refrigerant is avoided through the refrigerant leakage final protection mode, the related risks of the dehumidifier after the refrigerant leakage are solved, the compressor stops running after the refrigerant of the dehumidifier leaks to a certain amount, the whole dehumidifier enters a refrigerant leakage protection program, and the extreme conditions such as fire disasters are prevented.
In some embodiments, the compressor stops and the fan motor continues to operate in the refrigerant leakage normal protection mode.
In some embodiments, the first exit condition is any one of: ambient temperature-evaporator tube temperature > a first temperature difference; the time for stopping the operation of the compressor reaches a third time length; and (5) shutting down the whole machine.
In some embodiments, the first time period is selected from the range of 20 minutes to 30 minutes, the second time period is selected from the range of 5 minutes to 8 minutes, the first temperature differential value is selected from the range of 5 ℃ to 8 ℃, and the third time period is selected from the range of 60 minutes to 70 minutes.
In some embodiments, the refrigerant leakage final protection mode includes: the compressor stops running and keeps in a stop state; and the fan motor stops after running for a fourth time, then is started once every fifth time, runs for a sixth time and continues to stop, and the steps are repeated.
In some embodiments, the fourth time period is selected from 60 minutes to 70 minutes, the fifth time period is selected from 25 minutes to 30 minutes, and the sixth time period is selected from 2 minutes to 3 minutes.
In some embodiments, the refrigerant leakage end mode is exited when a second exit condition is satisfied, where the second exit condition is: detecting that the power of the dehumidifier is cut off.
In some embodiments, if the refrigerant leakage normal protection mode is not continuously entered, the number of times of entering the refrigerant leakage normal protection mode is cleared and counted again.
In some embodiments, the following condition is satisfied, and the consecutive times of entering the refrigerant leakage conventional protection mode are cleared: ambient temperature-evaporator tube temperature > a first temperature difference; stopping the operation of the compressor; the whole machine is shut down or powered off.
According to a second aspect of the embodiment of the invention, the dehumidifier comprises: the temperature detection device comprises a machine body, a first temperature detection element and a second temperature detection element, wherein the machine body comprises an evaporator, and the evaporator is provided with a coil; the first temperature detection element is arranged on the side of the evaporator to detect the ambient temperature; the second temperature detection element is arranged on the evaporator heat pipe to detect the temperature of the evaporator pipe.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram illustrating a refrigerant leakage control method of a dehumidifier according to an embodiment of the present invention.
Fig. 2-10 are operation curves of different temperatures and different refrigerant leakage amounts.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
The existing dehumidifier directly tests the amount of the refrigerant remained in the whole dehumidifier system in the actual test process and feeds the amount of the refrigerant back to the control panel, so that the starting of a refrigerant leakage program is unrealistic. Related refrigerant leakage detection methods have been studied by related people, but most of them directly detect whether there is refrigerant in the environment.
Therefore, the temperature of the evaporator temperature sensing pipe is much lower than the ambient temperature when the dehumidifier normally operates, when the refrigerant begins to leak, the amount of the refrigerant entering the evaporator through the capillary throttling is reduced, the heat exchange between the refrigerant and the environment is too fast to evaporate, and the temperature of the evaporator temperature sensing pipe is higher than the temperature when the dehumidifier normally operates. By using the characteristic that the temperature of an evaporator temperature sensing pipe can rise when a refrigerant leaks, a refrigerant leakage protection program is formulated. In formulating the control rules we consider two temperature points: one evaporator coil temperature and one ambient temperature.
Patent CN104566771A discloses a refrigerant control method for a dehumidifier, which discloses detecting a temperature difference between an evaporator coil temperature and an ambient temperature, and finding a corresponding refrigerant leakage amount according to the temperature difference. The control method judges whether the refrigerant leaks or not only according to the instantaneous temperature difference, and the leakage amount of the refrigerant is also imaged by the product model and various operation parameters, so that the temperature difference is directly corresponding to the empirical value of the leakage amount of the refrigerant, and the judgment is inaccurate.
A refrigerant leakage control method according to an embodiment of the present invention is described below with reference to fig. 1 to 10.
As shown in fig. 1, a refrigerant leakage control method of a dehumidifier according to an embodiment of the present invention includes:
s1, judging whether the compressor continuously operates for a first time;
s2, if yes, judging whether the continuous second time duration satisfies the environment temperature-the evaporator tube temperature is less than or equal to the first temperature difference value;
s3, if yes, entering a refrigerant leakage conventional protection mode;
s4, when the first exit condition is met, exiting the refrigerant leakage conventional protection mode, and judging whether the continuous second time duration meets the condition that the ambient temperature-the evaporator tube temperature is less than or equal to a first temperature difference value;
s5, judging whether to enter a refrigerant leakage conventional protection mode for n times continuously; wherein n is more than or equal to 3.
And S6, if yes, entering a refrigerant leakage final protection mode.
Therefore, when the difference value between the ambient temperature and the evaporator tube temperature in the continuous second time period is smaller than or equal to the first temperature difference value, the refrigerant leakage conventional protection mode is entered, when the refrigerant leakage is relieved and the first exit condition is met, the refrigerant leakage conventional protection mode exits, if the number of times of entering and exiting the refrigerant leakage protection mode reaches the set number of times, the refrigerant leakage final protection mode is entered, the influence caused by further leakage of the refrigerant is avoided through the refrigerant leakage final protection mode, the related risks of the dehumidifier after the refrigerant leakage are solved, the compressor stops running after the refrigerant of the dehumidifier leaks to a certain amount, the whole dehumidifier enters a refrigerant leakage protection program, and the extreme conditions such as fire disasters are prevented.
In some embodiments, the first time period is selected from 20 minutes to 30 minutes, the second time period is selected from 5 minutes to 8 minutes, and the first temperature differential value is selected from 5 ℃ to 8 ℃.
Because the temperature of the evaporator temperature sensing pipe can rise after the refrigerant of the system leaks, the temperature difference delta T between the ambient temperature and the evaporator temperature sensing pipe is identified as T ring-T pipe through the control chip program to judge whether the system enters the refrigerant leakage protection program. If the temperature difference delta T is too large, when the leakage amount of the refrigerant is small, the dehumidifier can enter the refrigerant leakage protection when the dehumidifier can also perform the dehumidification function normally, and therefore, the user can be inconveniently used even if the protection is mistaken. If the temperature difference delta T is too small, the leakage amount of the refrigerant is too large, the whole dehumidifier cannot perform dehumidification, but the whole dehumidifier does not enter a refrigerant protection program, and potential safety hazards are brought to the use of users.
Therefore, through the analysis and summary of experimental data of each model in the past, the dehumidifier enters a refrigerant leakage protection program when the ambient temperature and the evaporator tube temperature continuously appear in a T-ring-T tube-5 ℃ (the temperature range is-20 to 80 ℃) after the compressor continuously runs for 20 minutes.
The observation in fig. 2 shows that when the working condition is 32 ℃/25 ℃, and the refrigerant leakage amount is 50% of the rated refrigerant amount, the whole dehumidifier can normally operate, and does not enter the refrigerant leakage protection program, and the water tank is observed to find that condensed water exists in the water tank, which indicates that the dehumidifier has the dehumidification function at the moment, and the exhaust temperature is 106 ℃ and does not exceed the specification requirement 115 ℃ of the compressor, which is normal.
It is observed from fig. 3 that when the working condition is 25 ℃/17 ℃ and the refrigerant leakage amount is 50% of the rated refrigerant amount, the dehumidifier enters a defrosting mode when the whole dehumidifier operates, and does not enter a refrigerant leakage protection program. The test of the exhaust temperature shows that the exhaust temperature is 93.5 ℃, is lower than that in figure 2, is normal and does not need to enter refrigerant leakage protection.
It is observed from fig. 4 that when the working condition is 18 ℃/12 ℃ and the refrigerant leakage amount is 50% of the rated refrigerant amount, the dehumidifier enters the defrosting mode when the whole dehumidifier runs, and does not enter the refrigerant leakage protection program. The test shows that the exhaust temperature is 81 ℃, and the exhaust temperature is normal and does not need to enter refrigerant leakage protection.
Therefore, the refrigerant leakage method does not enter the conventional refrigerant leakage protection mode when the refrigerant leakage amount is small so as to maintain the normal operation of the dehumidifier.
When the refrigerant amount of the dehumidifier leaks to 50% of the rated refrigerant amount, the test results are shown in FIG. 2, FIG. 3 and FIG. 4 (thermocouple # 9: ambient temperature, thermocouple # 10: evaporator tube temperature, thermocouple # 11: exhaust temperature)
As can be seen from fig. 2, 3 and 4, when the refrigerant of the dehumidifier leaks to 50% of the rated refrigerant amount, the Δ T ═ T ring-T pipe is far greater than 5 ℃ under different use environments, and the refrigerant leakage protection cannot be performed, so that the refrigerant leakage protection condition that the T ring-T pipe is less than or equal to 5 ℃ occurs when the ambient temperature and the evaporator pipe temperature continue for 5 minutes after the compressor continuously operates for 20 minutes is set to be appropriate, and the refrigerant leakage protection cannot be performed by mistake when the dehumidifier also performs dehumidification.
In some embodiments, the compressor stops and the fan motor continues to operate in the refrigerant leakage normal protection mode.
For example, when the refrigerant continues to leak to 35% of the rated refrigerant amount, the test results are shown in fig. 5, 6 and 7. It is observed from fig. 5, fig. 6 and fig. 7 that when the working conditions are 32 ℃/25 ℃, 25 ℃/17 ℃ and 18 ℃/12 ℃ respectively, and the refrigerant leaks to 35% of the rated refrigerant quantity, the dehumidifier enters the refrigerant leakage protection program, at this time, the compressor stops running, the fan motor runs, and the nixie tube flickers P7.
Therefore, under the refrigerant leakage conventional protection mode, the compressor stops running, high-temperature fire is avoided, and meanwhile the fan motor operates to further cool the compressor.
In some embodiments, the first exit condition is any one of: ambient temperature-evaporator tube temperature > a first temperature difference; the time for stopping the operation of the compressor reaches a third time length; and (5) shutting down the whole machine. The third time period may be selected from 60 minutes to 70 minutes.
Specifically, after the refrigerant leakage conventional protection program is started, the refrigerant protection program can be exited by setting any one of the following three conditions to be satisfied, and the three conditions are as follows:
the first condition is as follows: t ring-T tube is more than 5 ℃;
and a second condition: the compressor stops running for 60 minutes;
and (3) carrying out a third condition: and (5) shutting down.
And in the third condition, all programs return to zero as long as the system is shut down, and the refrigerant leakage conventional protection mode can be immediately quitted.
It is observed from fig. 5, 6 and 7 that the evaporator tube temperature is higher than the ambient temperature when the compressor stops running, and the condition T-ring-T-tube > 5 ℃ can not be achieved normally, and only the condition one is set according to the control logic of the entering refrigerant leakage protection condition.
It is observed from fig. 5, 6, and 7 that, after the compressor stops operating for 60 minutes, the compressor is restarted, and the dehumidifier exits the refrigerant protection program, thereby satisfying the setting of the second condition. Under normal conditions, if there is no manual shutdown, the dehumidifier will generally pass the following conditions: the compressor stops running for 60 minutes and then the refrigerant leakage protection program is exited.
The refrigerant leakage protection is quitted after the compressor stops running for 60 minutes, and the compressor is started again at the moment, and the steps are repeated, so that the final protection program of the refrigerant leakage is set. In some embodiments, the refrigerant leakage final protection mode includes:
s61, stopping running the compressor and keeping the compressor in a stopped state;
and S62, stopping the fan motor after the fan motor operates for the fourth time period, starting the fan motor every fifth time period, operating the fan motor for the sixth time period, and continuing to stop the fan motor, and so on.
Therefore, under the refrigerant leakage final protection mode, the compressor is stopped, the fan runs for a long time firstly, and then is started for a short time at intervals, so that the refrigerant leakage is reduced, and the overhigh load temperature is avoided.
In some embodiments, the fourth time period is selected from 60 minutes to 70 minutes, the fifth time period is selected from 25 minutes to 30 minutes, and the sixth time period is selected from 2 minutes to 3 minutes.
Specifically, when the number of successive refrigerant leakage protection times > is 3, the dehumidifier enters a refrigerant leakage final protection program. The final protection test results of refrigerant leakage when the refrigerant leaks to 35% of the rated refrigerant amount are shown in fig. 8, 9 and 10.
It is observed from the curves in fig. 8, 9 and 10 that when the working conditions are 32 ℃/25 ℃, 25 ℃/17 ℃ and 18 ℃/12 ℃ respectively, the refrigerant leaks to 35% of the rated refrigerant quantity, the dehumidifier enters the refrigerant leakage final protection program. After the final protection program is entered, the compressor stops running, the fan motor stops running after 60 minutes, the fan motor is started for two minutes and the compressor stops starting all the time every 30 minutes, and at the moment, the nixie tube displays P7. When the refrigerant leakage is finally protected, the compressor is always stopped, and potential safety hazards caused by overheating of the compressor can be effectively prevented.
Regarding the exit condition and the zero clearing rule of the refrigerant leakage final protection program, in consideration of the use safety of users, the final protection program of the refrigerant leakage can be exited only by cutting off the power supply of the dehumidifier after the refrigerant leakage final protection program is entered. In some embodiments, at S7, the refrigerant leakage final mode is exited when a second exit condition is satisfied, where the second exit condition is: detecting that the power of the dehumidifier is cut off.
In some embodiments, if the refrigerant leakage normal protection mode is not continuously entered, the number of times of entering the refrigerant leakage normal protection mode is cleared and counted again. Thereby, the counting result is more accurate.
Optionally, the following conditions are met, and the number of consecutive times of entering the refrigerant leakage conventional protection mode is cleared: 1) ambient temperature-evaporator tube temperature > a first temperature difference; 2) stopping the operation of the compressor; 3) the whole machine is shut down or powered off. Therefore, the zero clearing is carried out under the conditions, the judgment result of the continuous entering times can be more accurate, and the phenomenon that the refrigerant leaks to enter the final protection mode by mistake is avoided.
Specifically, when the dehumidifier does not continuously enter the refrigerant leakage program, the zero clearing rule is required.
The specified zero clearing rule is as follows:
the first condition is as follows: t ring-T tube is more than 5 ℃;
and a second condition: the compressor stops running (except for 60 minutes into the protection rule);
and (3) carrying out a third condition: shutdown or power off;
and when any one of the conditions meets the zero clearing rule, entering a zero clearing program, and resetting and counting the condition that the continuous number of times of entering the refrigerant protection > is 3.
A dehumidifier according to an embodiment of the second aspect of the present invention comprises: the temperature detection device comprises a machine body, a first temperature detection element and a second temperature detection element, wherein the machine body comprises an evaporator, and the evaporator is provided with a coil; the first temperature detection element is arranged on the side of the evaporator to detect the ambient temperature; the second temperature detection element is arranged on the evaporator heat pipe to detect the temperature of the evaporator pipe.
Therefore, the existing dehumidifier detects whether a refrigerant leaks by additionally arranging a temperature sensing pipe on an exhaust pipe through analysis, the dehumidifier of the embodiment of the invention sets a series of refrigerant leakage control processes through software control, does not need additional part cost investment, solves the related risks existing in the dehumidifier after the refrigerant leaks, stops the operation of the compressor after the refrigerant of the dehumidifier leaks to a certain amount, and prevents extreme conditions such as fire and the like from occurring when the whole dehumidifier enters a refrigerant leakage protection program.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A refrigerant leakage control method of a dehumidifier is characterized by comprising the following steps:
judging whether the compressor continuously operates for a first time period or not;
if so, judging whether the continuous second time duration meets the environment temperature-the evaporator tube temperature is less than or equal to a first temperature difference value;
if yes, entering a refrigerant leakage conventional protection mode;
when the first exit condition is met, the refrigerant leakage conventional protection mode is exited, and whether the continuous second time duration is met or not is judged again, wherein the ambient temperature-the temperature of the evaporator tube is less than or equal to a first temperature difference value;
judging whether to enter a refrigerant leakage conventional protection mode for n times continuously, wherein n is more than or equal to 3;
and if so, entering a refrigerant leakage final protection mode.
2. The refrigerant leakage control method as claimed in claim 1, wherein the compressor stops operating and the fan motor continues operating in the refrigerant leakage normal protection mode.
3. The refrigerant leakage control method according to claim 1, wherein the first exit condition is any one of:
ambient temperature-evaporator tube temperature > a first temperature difference;
the time for stopping the operation of the compressor reaches a third time length;
and (5) shutting down the whole machine.
4. The refrigerant leakage control method as claimed in claim 3, wherein the first time period is selected from 20 minutes to 30 minutes, the second time period is selected from 5 minutes to 8 minutes, the first temperature difference value is selected from 5 ℃ to 8 ℃, and the third time period is selected from 60 minutes to 70 minutes.
5. The refrigerant leakage control method according to any one of claims 1 to 4, wherein the refrigerant leakage final protection mode includes:
the compressor stops running and keeps in a stop state; and is
And stopping the fan motor after the fan motor operates for the fourth time period, starting the fan motor once every fifth time period, operating for the sixth time period, and continuing to stop, and so on.
6. The refrigerant leakage control method as claimed in claim 5, wherein the fourth time period is selected from 60 minutes to 70 minutes, the fifth time period is selected from 25 minutes to 30 minutes, and the sixth time period is selected from 2 minutes to 3 minutes.
7. The refrigerant leakage control method according to any one of claims 1 to 4, wherein the refrigerant leakage final mode is exited when a second exit condition is satisfied, the second exit condition being: detecting that the power of the dehumidifier is cut off.
8. The refrigerant leakage control method according to claim 1, wherein if the refrigerant leakage normal protection mode is not continuously entered, the number of times of continuously entering the refrigerant leakage normal protection mode is cleared and counted again.
9. The refrigerant leakage control method according to claim 8, wherein the number of consecutive times of entering the refrigerant leakage normal protection mode is cleared if any one of the following conditions is satisfied:
ambient temperature-evaporator tube temperature > a first temperature difference;
stopping the operation of the compressor;
the whole machine is shut down or powered off.
10. A dehumidifier, comprising:
a housing including an evaporator having a coil;
a first temperature detection element provided on the evaporator side to detect an ambient temperature; and
a second temperature detecting element provided on the evaporator heat pipe to detect the evaporator pipe temperature.
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