CN113154639B - Control method for anti-freezing protection of air conditioner - Google Patents
Control method for anti-freezing protection of air conditioner Download PDFInfo
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- CN113154639B CN113154639B CN202110572313.4A CN202110572313A CN113154639B CN 113154639 B CN113154639 B CN 113154639B CN 202110572313 A CN202110572313 A CN 202110572313A CN 113154639 B CN113154639 B CN 113154639B
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a control method for preventing freezing protection of an air conditioner, which comprises the following steps: after the inner fan runs for a preset time N, detecting a numerical value P0 of the static pressure sampling device; step two: running a refrigeration mode, detecting the outdoor environment temperature TW of the outdoor unit of the air conditioner, and according to the detected outdoor environment temperature TW and a preset first temperature value TW1Comparing; step three: detecting the indoor environment temperature TN of the air conditioner, and according to the detected indoor environment temperature TN and the preset second temperature value TN1Carrying out comparison; has the following beneficial effects: whether anti-freezing protection needs to be carried out or not can be judged and detected more accurately, protection on a refrigerating system of the air conditioner is facilitated, the service life of the air conditioner is prolonged, and the use experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method for anti-freezing protection of an air conditioner.
Background
In some comparatively special occasions, the air conditioner can be very low at outdoor ambient temperature, and carries out low temperature refrigeration operation under the lower condition of indoor ambient temperature, because the reduction of indoor ambient temperature, when the refrigerant liquid by outdoor overcondensation flows through indoor heat exchanger, can't evaporate completely, evaporating temperature, evaporating pressure are lower to cause indoor heat exchanger to frost or even freeze, and the emergence of above-mentioned condition can lead to following consequence: 1. the refrigerant liquid flowing through the indoor unit reflows to the compressor due to incomplete evaporation, so that the liquid impact of the compressor is easily caused, and the compressor is damaged after long-term use, so that the service life of the compressor is influenced, and the service life of the air conditioner is shortened; 2. the evaporation pressure and the evaporation temperature are too low, so that the condensed water is increased easily, and the phenomena of water leakage of a ceiling and the like are caused due to untimely water drainage; 3. the unsmooth drainage also causes more and more accumulated condensed water, the condensed ice blocks are thicker and thicker, the fins of the heat exchanger can be propped against, the fins deform, even the drainage holes are blocked, the water blowing condition is caused, and the user experience is influenced.
In the prior art, the start and stop of an outdoor compressor are controlled mainly according to the collected relevant temperature of an indoor unit, namely the temperature of the middle part or the outlet temperature of an indoor heat exchanger, so that frost on the indoor heat exchanger is melted, and the aim of protecting a refrigerating system is fulfilled. The reason why the frost protection is misjudged due to the fact that certain deviation exists when the temperature is used for detecting the frost protection, and the frosting and icing state of the indoor heat exchanger cannot be accurately judged, is as follows: 1. the temperature sampling is a temperature sensing probe, temperature acquisition deviation exists, temperature difference of 1-2 degrees possibly exists, the error is large enough for the temperature entering into the anti-freezing protection condition, and the temperature difference can cause the temperature to enter into the anti-freezing protection state too fast or too slowly; 2. if the temperature sensing probe is missed or loosened, the detection and judgment of the air conditioner on the anti-freezing protection are influenced; 3. when the indoor heat exchanger is cooled at low temperature, the flow path of the indoor heat exchanger is easy to have a bias flow phenomenon, and the high temperature is possibly detected at the moment, other flow paths can be frosted and frozen, the air outlet is seriously blocked, but the air outlet still does not enter the protection; 4. this phenomenon also occurs when the indoor heat exchanger is blocked by a separate flow path.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a control method for preventing freezing protection of an air conditioner.
In order to achieve the above object, the present invention provides a control method for preventing freezing protection of an air conditioner, which comprises the following steps:
the method comprises the following steps: detecting the value P0 of the static pressure sampling device after the internal fan operates for a preset time;
step two: the method comprises the steps of running a refrigeration mode, detecting the outdoor environment temperature TW of the outdoor unit of the air conditioner, and comparing the detected outdoor environment temperature TW with a preset first temperature value TW 1;
if the outdoor environment temperature TW is smaller than a preset first temperature value TW1, entering the next step;
if the outdoor environment temperature TW is greater than or equal to the preset first temperature value TW1, ending;
step three: detecting the indoor environment temperature TN of the air conditioner, and comparing the detected indoor environment temperature TN with a preset second temperature value TN 1;
if the indoor environment temperature TN is less than the preset second temperature value TN1, the next step is proceeded to,
if the indoor environment temperature TN is greater than or equal to the preset second temperature value TN1, ending;
step four: detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and entering an anti-freezing protection function if P is smaller than the product of P0 and A and lasts for M1 minutes, wherein A is an air volume attenuation coefficient;
step five: detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and if P is greater than the product of P0 and B and lasts for M2 minutes, quitting the anti-freezing protection function, wherein B is an air volume recovery coefficient;
step six: recording the maximum value of P detected by the static pressure sampling device in the step five as P1;
if P1 is greater than P0, then a P1 value is assigned to P0;
if P1 is less than or equal to P0, the P0 value is unchanged.
Preferably, during the anti-freezing protection process, the P value is detected in real time, and the maximum value in the process is recorded as P1.
Preferably, the preset first temperature value TW1 is set to a value below 15 ℃.
Preferably, the preset second temperature value TN1 is set to a value below 20 ℃.
Preferably, the value range of the preset running time N of the fan is 1-3 minutes.
Preferably, the air volume attenuation coefficient A ranges from 20% to 50%.
Preferably, the value range of the air volume recovery coefficient B is 80-100%.
Preferably, the duration M1 is in the range of 1-3 minutes.
Preferably, the duration M2 is in the range of 1-3 minutes.
By adopting the scheme, the method has the following beneficial effects: whether anti-freezing protection needs to be carried out or not can be judged and detected more accurately, protection on a refrigerating system of the air conditioner is facilitated, the service life of the air conditioner is prolonged, and the use experience of a user is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of a control method for preventing freezing protection of an air conditioner according to the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed.
The invention provides a control method for preventing freezing protection of an air conditioner, which comprises the following steps:
the method comprises the following steps: detecting the value P0 of the static pressure sampling device after the internal fan operates for a preset time;
step two: the method comprises the following steps of running a refrigeration mode, detecting the outdoor environment temperature TW of the outdoor unit of the air conditioner, and comparing the detected outdoor environment temperature TW with a preset first temperature value TW 1;
if the outdoor environment temperature TW is smaller than a preset first temperature value TW1, entering the next step;
if the outdoor environment temperature TW is greater than or equal to a preset first temperature value TW1, ending;
step three: detecting the indoor environment temperature TN of the air conditioner, and comparing the detected indoor environment temperature TN with a preset second temperature value TN 1;
if the indoor environment temperature TN is less than the preset second temperature value TN1, the next step is entered,
if the indoor environment temperature TN is greater than or equal to the preset second temperature value TN1, ending;
step four: detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and entering an anti-freezing protection function if P is smaller than the product of P0 and A and lasts for M1 minutes, wherein A is an air volume attenuation coefficient;
step five: detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and if P is greater than the product of P0 and B and lasts for M2 minutes, quitting the anti-freezing protection function, wherein B is an air volume recovery coefficient;
step six: recording the maximum value of P detected by the static pressure sampling device in the step five as P1;
if P1 is greater than P0, then a P1 value is assigned to P0;
if P1 is less than or equal to P0, the P0 value is unchanged.
And (4) when the sixth step is finished, the step two is resumed, and the rest steps are repeated from the step two, so that the cycle of controlling and judging the anti-freezing is formed.
In the embodiment, after an indoor unit fan operates for a preset time, a value P0 of a static pressure sampling device is detected and recorded, a refrigeration mode is operated, an outdoor environment temperature TW of an outdoor unit of an air conditioner is detected, the detected outdoor environment temperature TW is compared with a preset first temperature value TW1, if the outdoor environment temperature TW is less than a preset first temperature value TW1, the next step can be performed, if the outdoor environment temperature TW is greater than or equal to the preset first temperature value TW1, it is indicated that an anti-freezing protection function is not required to be performed, when the next step is performed, an indoor environment temperature TN of the air conditioner is detected, the detected indoor environment temperature TN is compared with a preset second temperature value TN1, when the indoor environment temperature TN is less than a preset second temperature value TN1, and when the indoor environment temperature TN is greater than or equal to the preset second temperature value TN1, if the value is less than the product of P0 and A and lasts for M1 minutes, the anti-freezing protection function is started, wherein A is an air volume attenuation coefficient, then the value P of the static pressure sampling device is detected in real time and compared with P0, if P is greater than the product of P0 and B and lasts for M2 minutes, wherein B is an air volume recovery coefficient, the maximum value of P detected by the static pressure sampling device in the fifth step is marked as P1, if P1 is greater than P0, the value P1 is assigned to P0, and if P1 is less than or equal to P0, the value P0 is not changed.
Preferably, during the anti-freezing protection process, the P value is detected in real time, and the maximum value in the process is recorded as P1.
Specifically, the value range of the preset first temperature value TW1 is below 15 ℃.
Here, the value range of the preset first temperature value TW1 is set to be 15 ℃ or lower, which is more suitable for better judgment on whether entering into anti-freezing is required.
Optionally, the value range of the preset second temperature value TN1 is below 20 ℃.
Here, the value range of the preset second temperature value TN1 is set to be less than 20 ℃, which better meets the better judgment of whether the freezing prevention needs to be performed.
Specifically, the value range of the preset running time N of the fan is 1-3 minutes.
Therefore, in the first step, the operation preset time of the internal fan is set to be 1-3 minutes, the control is carried out, and the operation preset time of the fan is further set, so that the subsequent steps can be better judged and compared.
Specifically, the value range of the air volume attenuation coefficient A is 20% -50%.
Specifically, the value range of the air volume recovery coefficient B is 80-100%.
Here, by further setting the value ranges of the air volume attenuation coefficient a and the air volume recovery coefficient B, it is possible to more accurately determine whether entering or exiting of the freeze-proof is required.
Optionally, the value range of the duration M1 is 1-3 minutes, and the value range of the duration M2 is 1-3 minutes.
Setting time length, detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and entering an anti-freezing protection function when P is smaller than the product of P0 and A and lasts for 1-3 minutes; and when P is larger than the product of P0 and B and lasts for 1-3 minutes, the anti-freezing protection function is quitted.
In the sixth step:
recording the maximum value of P detected by the static pressure sampling device in the step five as P1;
if P1 is greater than P0, then a P1 value is assigned to P0;
if P1 is less than or equal to P0, the P0 value is unchanged.
By adopting the technical scheme, the anti-freezing protection accuracy of the air conditioner can be effectively improved, and the service life of the air conditioner is further prolonged.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
It should be understood that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. The present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (9)
1. A control method for preventing freezing protection of an air conditioner is characterized by comprising the following steps:
the method comprises the following steps: detecting a numerical value P0 of the static pressure sampling device after the internal fan operates for a preset time N;
step two: the method comprises the steps of running a refrigeration mode, detecting the outdoor environment temperature TW of the outdoor unit of the air conditioner, and comparing the detected outdoor environment temperature TW with a preset first temperature value TW 1;
if the outdoor environment temperature TW is smaller than a preset first temperature value TW1, entering the next step;
if the outdoor environment temperature TW is greater than or equal to a preset first temperature value TW1, ending;
step three: detecting the indoor environment temperature TN of the air conditioner, and comparing the detected indoor environment temperature TN with a preset second temperature value TN 1;
if the indoor environment temperature TN is less than the preset second temperature value TN1, the next step is entered,
if the indoor environment temperature TN is greater than or equal to the preset second temperature value TN1, ending;
step four: detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and entering an anti-freezing protection function if P is smaller than the product of P0 and A and lasts for M1 minutes, wherein A is an air volume attenuation coefficient;
step five: detecting a numerical value P of the static pressure sampling device in real time, comparing the numerical value P with P0, and if P is greater than the product of P0 and B and lasts for M2 minutes, quitting the anti-freezing protection function, wherein B is an air volume recovery coefficient;
step six: recording the maximum value of P detected by the static pressure sampling device in the step five as P1;
if P1 is greater than P0, then a P1 value is assigned to P0;
if P1 is less than or equal to P0, the P0 value is unchanged.
2. The method as claimed in claim 1, wherein during the process of freeze protection, the P value is detected in real time, and the maximum value during the process is recorded as P1.
3. The method for controlling the freezing protection of the air conditioner according to claim 1, wherein the preset first temperature value TW1 is set to a value below 15 ℃.
4. The control method for preventing the air conditioner from freezing according to claim 1, wherein the preset second temperature value TN1 is within a value range of 20 ℃ or lower.
5. The control method for preventing the air conditioner from freezing according to claim 1, wherein the preset running time N of the fan ranges from 1 minute to 3 minutes.
6. The control method for preventing the air conditioner from freezing according to claim 1, wherein the value range of the air volume attenuation coefficient A is 20% -50%.
7. The control method for preventing the air conditioner from freezing according to claim 1, wherein the value range of the air volume recovery coefficient B is 80% -100%.
8. The control method for preventing the air conditioner from freezing according to claim 1, wherein the duration M1 is in a range of 1-3 minutes.
9. The control method for preventing the air conditioner from freezing according to claim 1, wherein the duration M2 is in a range of 1-3 minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107514746A (en) * | 2017-08-04 | 2017-12-26 | 合肥美的暖通设备有限公司 | Defrosting control method, device, air conditioner and computer-readable recording medium |
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| WO1999000631A1 (en) * | 1997-06-28 | 1999-01-07 | Daewoo Electronics Co., Ltd. | Apparatus and method for preventing an evaporator for an air-conditioning system from freezing |
| CN105318492B (en) * | 2014-07-30 | 2017-06-06 | 广东美的集团芜湖制冷设备有限公司 | The defrosting control method and device of air-conditioner |
| JP6459714B2 (en) * | 2015-03-30 | 2019-01-30 | 株式会社デンソー | Control device and air conditioner for vehicle |
| KR102399878B1 (en) * | 2017-11-14 | 2022-05-19 | 현대모비스 주식회사 | Apparatus for anti-frost of evapoator for vehicles and method thereof |
| CN110360708A (en) * | 2019-06-06 | 2019-10-22 | 青岛海尔空调电子有限公司 | A kind of method, apparatus and air-conditioner outdoor unit for realizing defrosting |
| CN110500714B (en) * | 2019-07-16 | 2020-08-25 | 珠海格力电器股份有限公司 | Air conditioning system and anti-freezing method thereof |
| US11460207B2 (en) * | 2019-09-24 | 2022-10-04 | Lennox Industries Inc. | Avoiding coil freeze in HVAC systems |
| CN112050349A (en) * | 2020-08-24 | 2020-12-08 | 珠海格力电器股份有限公司 | Anti-freezing control method, device and equipment and air conditioner |
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| CN107514746A (en) * | 2017-08-04 | 2017-12-26 | 合肥美的暖通设备有限公司 | Defrosting control method, device, air conditioner and computer-readable recording medium |
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