CN111503759A - Air conditioner outdoor unit, refrigerant detection method and storage medium - Google Patents
Air conditioner outdoor unit, refrigerant detection method and storage medium Download PDFInfo
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- CN111503759A CN111503759A CN202010361042.3A CN202010361042A CN111503759A CN 111503759 A CN111503759 A CN 111503759A CN 202010361042 A CN202010361042 A CN 202010361042A CN 111503759 A CN111503759 A CN 111503759A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 399
- 238000001514 detection method Methods 0.000 title claims abstract description 166
- 230000008859 change Effects 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 21
- 238000013016 damping Methods 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 description 33
- 239000000126 substance Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- UJPMYEOUBPIPHQ-UHFFFAOYSA-N 1,1,1-trifluoroethane Chemical compound CC(F)(F)F UJPMYEOUBPIPHQ-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/28—Refrigerant piping for connecting several separate outdoor units
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner outdoor unit, a refrigerant detection method and a storage medium, wherein the air conditioner outdoor unit comprises a shell, a four-way valve assembly, a first refrigerant detection device and a second refrigerant detection device, the four-way valve assembly is arranged in the shell and is provided with a four-way valve and a connecting pipeline connected with the four-way valve, the first refrigerant detection device is arranged in the shell and is used for detecting the refrigerant concentration of the environment where the four-way valve is arranged, the second refrigerant detection device is arranged on at least one connecting pipeline and is used for detecting the refrigerant concentration on the surface of the connecting pipeline, namely the refrigerant leakage is determined to occur through the refrigerant concentration difference detected by the two refrigerant detection devices by arranging the first refrigerant detection device and the second refrigerant detection device in the embodiment, thereby improving the accuracy of the refrigerant detection result.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner outdoor unit, a refrigerant detection method and a storage medium.
Background
In the long-term use process of the refrigerant detection method, the refrigerant leakage phenomenon can be caused by the factors of bending, poor weldability, corrosion and the like of the refrigerant pipeline. The decrease of the refrigerant quantity of the outdoor unit of the air conditioner causes the reduction of the air conditioning performance. And the compressor of the outdoor unit of the air conditioner runs for a long time in a state of lacking refrigerant, which can cause the damage of the compressor. Therefore, it is necessary to check whether the refrigerant quantity of the outdoor unit of the air conditioner is normal in time.
However, in the conventional outdoor unit of an air conditioner, in order to reduce noise in the refrigerant detection method, a four-way valve pipe is wrapped with a novel damping material to reduce vibration of a pipe system. The existing refrigerant leakage detection scheme is generally used for detecting the pressure of the refrigerant to determine whether the refrigerant leaks, and the existing refrigerant leakage detection scheme is adopted for a refrigerant circulating system adopting a novel damping material to wrap a four-way valve pipeline, so that the defect that the detection result of the refrigerant leakage is inaccurate easily exists.
Disclosure of Invention
The invention mainly aims to provide an air conditioner outdoor unit, a refrigerant detection method and a storage medium, and aims to improve the accuracy of a refrigerant detection result.
In order to achieve the above object, the present invention provides an outdoor unit of an air conditioner, comprising:
a housing;
the four-way valve assembly is arranged in the shell and is provided with a four-way valve and a connecting pipeline connected with the four-way valve;
the first refrigerant detection device is arranged in the shell and used for detecting the refrigerant concentration of the environment where the four-way valve is located;
and the second refrigerant detection device is arranged on at least one connecting pipeline and is used for detecting the refrigerant concentration on the surface of the connecting pipeline.
Optionally, the outdoor unit of the air conditioner further comprises a middle partition plate and a compressor, the middle partition plate divides the casing into a first cavity and a second cavity, the four-way valve assembly is located in the first cavity, and the compressor is arranged in the second cavity; the first refrigerant detection device is arranged in the first cavity.
Optionally, the first refrigerant detection device is disposed at an end of the middle partition plate away from the bottom of the housing.
Optionally, the second refrigerant detection device is located at a welding position of the connecting pipeline and the four-way valve.
Optionally, the four-way valve and the outer surface of the connecting pipeline are coated with damping members.
In order to achieve the above object, the present invention provides a refrigerant detection method, including:
acquiring a first refrigerant concentration of an environment where the four-way valve is located through the first refrigerant detection device;
acquiring a second refrigerant concentration of the connecting pipeline through the second refrigerant detection device;
and determining whether the outdoor unit of the air conditioner leaks the refrigerant according to the difference value of the first refrigerant concentration and the second refrigerant concentration.
Optionally, the step of determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to the difference between the first refrigerant concentration and the second refrigerant concentration includes:
obtaining the change rate of the difference value of the first refrigerant concentration and the second refrigerant concentration within a preset time interval;
and determining whether the outdoor unit of the air conditioner leaks the refrigerant according to the change rate.
Optionally, the determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to the change rate includes:
if the change rate is larger than a preset change rate threshold value, judging that the refrigerant leaks from the outdoor unit of the air conditioner;
and if the change rate is less than or equal to a preset change rate threshold value, judging that the refrigerant leakage does not occur in the outdoor unit of the air conditioner.
Optionally, after the step of obtaining the second refrigerant concentration of the connection pipeline by the second refrigerant detection device, the method further includes:
comparing the first refrigerant concentration with a preset refrigerant concentration, and comparing the second refrigerant concentration with the preset refrigerant concentration;
and when the first refrigerant concentration or the second refrigerant concentration is greater than a preset refrigerant concentration, executing the step of determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to the difference value of the first refrigerant concentration and the second refrigerant concentration.
In addition, the invention also provides a storage medium, wherein the storage medium stores a refrigerant detection program, and the refrigerant detection program realizes the steps of the refrigerant detection method when being executed by the processor.
The invention provides an air conditioner outdoor unit, a refrigerant detection method and a storage medium, wherein the air conditioner outdoor unit comprises a shell, a four-way valve assembly, a first refrigerant detection device and a second refrigerant detection device, the four-way valve assembly is arranged in the shell and is provided with a four-way valve and a connecting pipeline connected with the four-way valve, the first refrigerant detection device is arranged in the shell and is used for detecting the refrigerant concentration of the environment where the four-way valve is arranged, the second refrigerant detection device is arranged on at least one connecting pipeline and is used for detecting the refrigerant concentration on the surface of the connecting pipeline, namely the refrigerant leakage is determined to occur through the refrigerant concentration difference detected by the two refrigerant detection devices by arranging the first refrigerant detection device and the second refrigerant detection device in the embodiment, thereby improving the accuracy of the refrigerant detection result.
Drawings
Fig. 1 is a schematic structural view of an outdoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a separator according to an embodiment of the present invention;
FIG. 3 is an enlarged view of the structure of portion A in FIG. 2;
FIG. 4 is a schematic structural diagram of a four-way valve assembly according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the structure of part B in FIG. 4;
fig. 6 is a schematic flow chart illustrating steps of a refrigerant detecting method according to a first embodiment of the present invention;
fig. 7 is a flowchart illustrating steps of a refrigerant detecting method according to a second embodiment of the present invention.
Description of reference numerals:
| 1 | shell body | 11 | The first cavity |
| 2 | Four- |
12 | |
| 3 | First |
21 | Four- |
| 4 | Second |
22 | Connecting |
| 5 | Compressor with a compressor housing having a plurality of compressor blades |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 5, an embodiment of the invention provides an outdoor unit of an air conditioner.
Fig. 1 is a schematic structural view of an outdoor unit of an air conditioner according to an embodiment of the present invention. Specifically, the outdoor unit of the air conditioner comprises a casing 1, a four-way valve assembly 2, a first refrigerant detection device 3 and a second refrigerant detection device 4, wherein the four-way valve assembly 2 is arranged in the casing 1, and the four-way valve assembly 2 has a four-way valve 21 and a connection line 22 with the four-way valve 21, the first refrigerant detection device 3 is arranged in the shell 1, the first refrigerant detection device 3 is used for detecting the refrigerant concentration of the environment where the four-way valve 21 is located, the second refrigerant detection device 4 is disposed on at least one of the connection pipelines 22, the second refrigerant detection device 4 is configured to detect a refrigerant concentration on a surface of the connection pipeline 22, and determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to a concentration difference between the refrigerant concentration detected by the first refrigerant detection device 3 and the refrigerant concentration detected by the second refrigerant detection device 4.
Further, the four-way valve 21 is provided with four valve ports, that is, the connecting pipeline 22 includes an exhaust pipe, a return pipe, a valve cooling pipe and a low-pressure valve pipe, and is respectively connected to the four valve ports of the four-way valve 21. In this embodiment, the connection pipeline 22 is connected to the valve port of the four-way valve 21 by welding, that is, at this time, the welding point of the four-way valve 21 is easily damaged, so that the refrigerant leakage phenomenon occurs in the air conditioner. In the embodiment, the outer surface of the connecting pipeline 22 is coated with a damping member (not shown), so that the refrigerant leaking from the damaged point of the connecting pipeline 22 is not rapidly diffused into the air, but is filled into the hollow space of the damping material first and then slowly diffused into the air. Even if the refrigerant leakage phenomenon occurs in the air conditioner, the refrigerant leakage speed is low, and the system pressure of a refrigerant circulating system of the air conditioner is not changed greatly, namely the system pressure of the conventional refrigerant circulating system is detected, so that the problem that the refrigerant leakage slowly leaks cannot be detected by judging whether the refrigerant leakage of the air conditioner occurs or not can be solved, and the defect that the refrigerant leakage detection result is inaccurate is caused. For example, in the technical solution described in this embodiment, refrigerant detection devices may be respectively disposed in the environments where the connection pipeline 22 and the four-way valve 21 are located, so as to determine whether refrigerant leakage occurs in the air conditioner according to the refrigerant concentrations of the environments where the connection pipeline 22 and the four-way valve 21 are located, which are respectively obtained by the two refrigerant detection devices.
Specifically, whether refrigerant leakage occurs in the outdoor unit of the air conditioner is determined by a change rate of a concentration difference value between the refrigerant concentration detected by the first refrigerant detection device 3 and the refrigerant concentration detected by the second refrigerant detection device 4 within a preset time interval. For example, if the change rate is greater than a preset change rate threshold value, it is determined that refrigerant leakage occurs in the outdoor unit of the air conditioner; and if the change rate is less than or equal to a preset change rate threshold value, judging that the refrigerant leakage does not occur in the outdoor unit of the air conditioner. The preset time interval and the preset change rate threshold are set by a user, and specific values are not limited herein.
In addition, in the embodiment, the outer surface of the connecting pipe 22 is coated with a damping member (not shown), that is, the outer surface of the connecting pipe 22 is coated with a layer of damping material, so as to reduce the vibration of the connecting pipe 22, thereby reducing the noise generated by the outdoor unit of the air conditioner during the operation. In addition, the outer surface of the four-way valve 21 is also coated with a layer of damping material, so that the noise generated in the working process of the outdoor unit of the air conditioner can be further reduced. In this embodiment, the damping material may be selected according to specific requirements, and is not limited herein.
It is understood that the damping material is not disposed on the first refrigerant detection device 3 and the second refrigerant detection device 4.
In this embodiment, since the connection pipeline 22 includes the exhaust pipe, the return pipe, the valve cooling pipe and the low pressure valve pipe, the outdoor unit of the air conditioner further includes the compressor 5, the compressor 5 is disposed in the casing 1, and the compressor 5 is communicated with one end of the four-way valve 21 through the connection pipeline 22. Namely, the exhaust port of the compressor 5 is communicated with the four-way valve 21 through the exhaust pipe, and the return port of the compressor 5 is communicated with the four-way valve 21 through the liquid storage tank and the return pipe. Optionally, the heat exchanger is disposed in an environment where the four-way valve 21 is located.
Specifically, the outdoor unit of the air conditioner further includes an outdoor heat exchanger (not shown) disposed in the casing 1, and the outdoor heat exchanger is communicated with the four-way valve 21 through the connecting pipeline 22, that is, the outdoor heat exchanger is communicated with the four-way valve 21 through the valve cooling pipe. Optionally, the outdoor heat exchanger is disposed outside the environment of the four-way valve 21. In this embodiment, the four-way valve 21 is communicated with the indoor unit of the air conditioner through the low-pressure valve pipe.
Further, as shown in fig. 2 and 3, the outdoor unit of an air conditioner further includes a middle partition plate 6, the middle partition plate 6 is disposed in the casing 1 to divide the space of the casing 1 into a first cavity 11 and a second cavity 12, wherein the four-way valve assembly 2 is disposed in the first cavity 11, that is, the environment space where the four-way valve 21 is located is the first cavity 11. In this embodiment, the first refrigerant detection device 3 is disposed on the middle partition plate 6 and located in the first cavity 11, so as to detect the refrigerant concentration in the first cavity 11 through the first refrigerant detection device 3.
It will be appreciated that the compressor 5 is located in the first chamber 11 and the heat exchanger is located in the second chamber 12.
Further, the refrigerant is refrigerant R404A. Specifically, the refrigerant includes any two of gas components such as pentafluoroethane, trifluoroethane, tetrafluoroethane, and results in refrigerant gas to float when the air conditioning refrigerant leaks, that is, in this embodiment, the first refrigerant detection device 3 is detachably connected to one end of the middle partition plate 6, which is far away from the bottom of the housing 1, that is, the first refrigerant detection device 3 is located in the refrigerant floating direction, so as to improve the accuracy of the refrigerant concentration detected by the first refrigerant detection device 3.
Optionally, the first refrigerant detection device 3 may be detachably connected to one end of the middle partition plate 6 away from the bottom of the housing 1 through a fastening structure. Of course, in other embodiments, the first refrigerant detection device 3 may also be detachably connected to an end of the middle partition plate 6 away from the bottom of the housing 1 through other connection structures, and is not limited herein.
Specifically, the first refrigerant detection device 3 is an integrated detection module, and can emit detection waves with different wavelengths in the refrigerant detection process. Because different substances can absorb detection waves with different wavelengths, and the absorption amount of the same substance to the detection waves with the same wavelength is different when the content of the same substance is different, the wavelength data corresponding to each component in the detected refrigerant can be determined according to the absorption conditions of the detection waves with different wavelengths corresponding to the different substances. And then acquiring the corresponding concentration of each component in the refrigerant according to the wavelength data of each component in the mixture.
Alternatively, the first refrigerant detection device 3 may be any one of a gas sensor and a temperature sensor. For example, when the first refrigerant detection device 3 is a gas sensor, the concentration corresponding to each refrigerant gas may be determined according to the wavelength data of the detected refrigerant gas; or, when the first refrigerant detection device 3 is a gas sensor, since different refrigerant gases correspond to different temperature values, the refrigerant gas may be determined according to the detected temperature value, and the concentration corresponding to the refrigerant gas may be determined according to the wavelength data of the refrigerant gas corresponding to the temperature value.
Further, when the air conditioner leaks the refrigerant, the refrigerant leakage phenomenon occurs in the air conditioner due to the fact that the connecting end of the connecting pipeline 22 connected with the four-way valve 21 is easily damaged. As shown in fig. 4 and 5, in this embodiment, the second refrigerant detection device 4 is disposed at a connection end of the connection pipeline 22 connected to the four-way valve 21, so that the refrigerant concentration detected by the second refrigerant detection device 4 is more accurate.
It can be understood that, since the connecting pipeline 22 is welded to the four ports of the four-way valve 21, the refrigerant concentration can be detected when refrigerant leakage occurs only by providing the second refrigerant detecting device at the connecting end of any one of the connecting pipelines 22 connected to the four-way valve 21.
Specifically, the second refrigerant detection device 4 is an integrated detection module, and can emit detection waves with different wavelengths in the refrigerant detection process. Because different substances can absorb detection waves with different wavelengths, and the absorption amount of the same substance to the detection waves with the same wavelength is different when the content of the same substance is different, the wavelength data corresponding to each component in the detected refrigerant can be determined according to the absorption conditions of the detection waves with different wavelengths corresponding to the different substances. And then acquiring the corresponding concentration of each component in the refrigerant according to the wavelength data of each component in the mixture.
Alternatively, the second refrigerant detection device 4 may be any one of a gas sensor and a temperature sensor. For example, when the second refrigerant detection device 4 is a gas sensor, the concentration corresponding to each refrigerant gas may be determined according to the wavelength data of the detected refrigerant gas; or, when the second refrigerant detection device 4 is a gas sensor, since different refrigerant gases correspond to different temperature values, the refrigerant gas may be determined according to the detected temperature value, and the concentration corresponding to the refrigerant gas may be determined according to the wavelength data of the refrigerant gas corresponding to the temperature value.
Alternatively, the second refrigerant detection device 4 may be detachably connected to a connection end of the connection pipeline 22 connected to the four-way valve 21 through a snap structure. Of course, in other embodiments, the first refrigerant detecting device 3 may be detachably connected to a connection end of the connection pipeline 22 and the four-way valve 21 through another connection structure, and is not limited herein.
In this embodiment, the connecting pipeline 22 is connected to the valve port of the four-way valve 21 by welding, that is, at this time, the position of the welding point of the four-way valve 21 is easily damaged, so that the refrigerant leakage phenomenon occurs in the air conditioner. Namely, the second refrigerant detection device 4 is located at the welding position of the connecting pipeline and the four-way valve, so that the accuracy of refrigerant detection can be improved.
Since the four-way valve 21 has four ports, that is, four welding positions of the four-way valve 21 and the connecting pipeline 22, in this embodiment, the second refrigerant detecting device 4 may be disposed at any welding position, and there is no limitation here.
In this embodiment, the first refrigerant detection device 3 may also be configured to obtain wavelength data of each gas component in the refrigerant, determine a concentration corresponding to the gas component, and determine a concentration percentage of the refrigerant according to a ratio between the concentration corresponding to the gas component and the total concentration; similarly, the concentration percentages of the refrigerants can be obtained through the second refrigerant detection device 4, and whether refrigerant leakage occurs or not is determined according to the change rate of the difference between the concentration percentages in a preset time period. For example, if the change rate is greater than a preset change rate threshold value, it is determined that refrigerant leakage occurs in the outdoor unit of the air conditioner; and if the change rate is less than or equal to a preset change rate threshold value, judging that the refrigerant leakage does not occur in the outdoor unit of the air conditioner. The preset time interval and the preset change rate threshold are set by a user, and specific values are not limited herein.
In the present embodiment, the sensitivity of both the first refrigerant detection device 3 and the second refrigerant detection device 4 is greater than 5 × 10-6ml/sec, and the wavelength data of each component of the refrigerant capable of detecting leakage, thereby determining the refrigerant concentration.
In an exemplary embodiment, the first refrigerant detection device 3 and the second refrigerant detection device 4 may be a refrigerant detection sensor of a type CFC, HCFC, HFC, or H2, but is not limited thereto.
In the embodiment of the present invention, the outdoor unit of the air conditioner includes a casing 1, a four-way valve assembly 2, a first refrigerant detection device 3 and a second refrigerant detection device 4, the four-way valve assembly 2 is disposed in the casing 1, the four-way valve assembly 2 has a four-way valve 21 and a connection pipeline 22 connected to the four-way valve 21, the first refrigerant detection device 3 is disposed in the casing 1, the first refrigerant detection device 3 is configured to detect a refrigerant concentration of an environment where the four-way valve 21 is located, the second refrigerant detection device 4 is disposed on at least one of the connection pipelines 22, the second refrigerant detection device 4 is configured to detect a refrigerant concentration on a surface of the connection pipeline 22, that is, in this embodiment, the first refrigerant detection device 3 and the second refrigerant detection device 4 are disposed to determine that refrigerant leakage occurs according to a refrigerant concentration difference detected by the two refrigerant detection devices, thereby improving the accuracy of the refrigerant detection result.
Based on the above embodiment, the embodiment of the invention also provides a refrigerant detection method.
Fig. 6 is a schematic flow chart illustrating steps of a refrigerant detecting method according to a first embodiment of the present invention. Specifically, the refrigerant detection method includes:
s10, acquiring a first refrigerant concentration of an environment where the four-way valve is located through the first refrigerant detection device;
s20, acquiring a second refrigerant concentration of the connecting pipeline through the second refrigerant detection device;
and S30, determining whether refrigerant leakage occurs in the outdoor unit of the air conditioner according to the difference between the first refrigerant concentration and the second refrigerant concentration.
In this embodiment, the execution main body is an air conditioner outdoor unit, or may be a control terminal of the air conditioner outdoor unit, such as a server or a central controller, and the control terminal is connected with the air conditioner outdoor unit wirelessly or by wire, so as to control the air conditioner outdoor unit to execute corresponding operations.
As shown in fig. 1 to 5, the outdoor unit of an air conditioner includes a casing 1, a four-way valve assembly 2, a first refrigerant detection device 3 and a second refrigerant detection device 4, the four-way valve assembly 2 is disposed in the casing 1, the four-way valve assembly 2 has a four-way valve 21 and a connection pipeline 22 with the four-way valve 21, the first refrigerant detection device 3 is disposed in the casing 1, the first refrigerant detection device 3 is configured to detect a refrigerant concentration of an environment where the four-way valve 21 is located, the second refrigerant detection device 4 is disposed on at least one of the connection pipelines 22, and the second refrigerant detection device 4 is configured to detect a refrigerant concentration on a surface of the connection pipeline 22.
Specifically, the connecting pipeline 22 is connected to the valve port of the four-way valve 21 by welding, that is, the welding point of the four-way valve 21 is easily damaged, so that the refrigerant leakage phenomenon occurs in the air conditioner. In the embodiment, the outer surface of the connecting pipeline 22 is coated with a damping member (not shown), so that the refrigerant leaking from the damaged point of the connecting pipeline 22 is not rapidly diffused into the air, but is filled into the hollow space of the damping material first and then slowly diffused into the air. Even if the refrigerant leakage phenomenon occurs in the air conditioner, the refrigerant leakage speed is low, and the system pressure of a refrigerant circulating system of the air conditioner is not changed greatly, namely the system pressure of the conventional refrigerant circulating system is detected, so that the problem that the refrigerant leakage slowly leaks cannot be detected by judging whether the refrigerant leakage of the air conditioner occurs or not can be solved, and the defect that the refrigerant leakage detection result is inaccurate is caused.
Specifically, a first refrigerant concentration of an environment where the four-way valve 21 is located is obtained through the first refrigerant detection device 3, and a second refrigerant concentration of the connection pipeline 22 is obtained through the second refrigerant detection device 4, where the second refrigerant concentration obtained by the second refrigerant detection device 4 is the refrigerant concentration leaked on the surface of the connection pipeline 22.
After the first refrigerant concentration and the second refrigerant concentration are obtained, whether refrigerant leakage occurs in the outdoor unit of the air conditioner can be determined according to a difference value between the first refrigerant concentration and the second refrigerant concentration. In order to improve the accuracy of refrigerant detection, in this embodiment, after the difference between the first refrigerant concentration and the second refrigerant concentration is obtained, a change rate of the difference between the first refrigerant concentration and the second refrigerant concentration within a preset time interval needs to be obtained, and whether refrigerant leakage occurs in the outdoor unit of the air conditioner is determined according to the change rate. For example, if the change rate is greater than a preset change rate threshold value, it is determined that refrigerant leakage occurs in the outdoor unit of the air conditioner; and if the change rate is less than or equal to a preset change rate threshold value, judging that the refrigerant leakage does not occur in the outdoor unit of the air conditioner.
It can be understood that the preset time interval and the preset change rate threshold are preset values set by a user, and in the embodiment, the preset time interval and the preset change rate threshold can be set according to specific requirements, and are not limited herein.
Further, the refrigerant is refrigerant R404A. The refrigerant includes any two of gas components such as pentafluoroethane, trifluoroethane, tetrafluoroethane, and the like, that is, when the first refrigerant concentration of the environment where the four-way valve 21 is located is obtained by the first refrigerant detection device 3 in this embodiment, the first refrigerant concentration is the concentration and/or concentration percentage of each component in the refrigerant, where the concentration percentage is the ratio of the current refrigerant concentration. When the second refrigerant concentration of the connecting pipeline 22 is obtained by the second refrigerant detection device 4, the second refrigerant concentration is the concentration and/or concentration percentage of each component in the refrigerant.
That is, in other embodiments, it may also be determined whether the refrigerant leaks according to a change rate of the difference between the concentrations and/or concentration percentages of the components in the refrigerant, which are obtained by the two refrigerant detection devices, within a preset time interval.
Specifically, the first refrigerant detection device 3 and the second refrigerant detection device 4 are integrated detection modules, and can emit detection waves with different wavelengths in the refrigerant detection process. Because different substances can absorb detection waves with different wavelengths, and the absorption amount of the same substance to the detection waves with the same wavelength is different when the content of the same substance is different, the wavelength data corresponding to each component in the detected refrigerant can be determined according to the absorption conditions of the detection waves with different wavelengths corresponding to the different substances. And then acquiring the corresponding concentration of each component in the refrigerant according to the wavelength data of each component in the mixture.
Alternatively, the first refrigerant detection device 3 and the second refrigerant detection device 4 may be any one of a gas sensor and a temperature sensor. Taking the first refrigerant detection device 3 as an example, when the first refrigerant detection device 3 is a gas sensor, the concentration corresponding to each refrigerant gas can be determined according to the wavelength data of the detected refrigerant gas; or, when the first refrigerant detection device 3 is a gas sensor, since different refrigerant gases correspond to different temperature values, the refrigerant gas may be determined according to the detected temperature value, and the concentration corresponding to the refrigerant gas may be determined according to the wavelength data of the refrigerant gas corresponding to the temperature value.
Further, the sensitivity of both the first refrigerant detection device 3 and the second refrigerant detection device 4 is greater than 5 × 10-6ml/sec, and the concentration of each component of the refrigerant, namely the refrigerant concentration, is determined according to the wavelength data of each component of the refrigerant capable of detecting leakage.
In an exemplary embodiment, the first refrigerant detection device 3 and the second refrigerant detection device 4 may be a refrigerant detection sensor of a type CFC, HCFC, HFC, or H2, but is not limited thereto.
Further, before detecting the refrigerant of the air conditioner outdoor unit, that is, before the air conditioner outdoor unit operates, it is first determined whether the compressor has a fault, and if the compressor has a fault, it indicates that the air conditioner outdoor unit may have refrigerant leakage, at this time, the step of S10 is executed, that is, the first refrigerant concentration of the environment where the four-way valve is located is obtained through the first refrigerant detection device, so as to perform refrigerant detection on the air conditioner outdoor unit.
In the embodiment of the invention, a first refrigerant concentration of an environment where the four-way valve is located is obtained through the first refrigerant detection device, a second refrigerant concentration of the connecting pipeline is obtained through the second refrigerant detection device, whether refrigerant leakage occurs in the outdoor unit of the air conditioner is determined according to a difference value of the first refrigerant concentration and the second refrigerant concentration, and the refrigerant leakage is determined according to a refrigerant concentration difference value detected by the two refrigerant detection devices, so that the accuracy of a refrigerant detection result is improved.
Based on the first embodiment, as shown in fig. 7, a schematic step flow diagram of a refrigerant detection method according to a second embodiment of the invention is shown. Specifically, after the step of obtaining the second refrigerant concentration of the connection pipeline by the second refrigerant detection device, the method further includes:
s40, comparing the first refrigerant concentration with a preset refrigerant concentration, and comparing the second refrigerant concentration with the preset refrigerant concentration;
and executing the step S30 when the first refrigerant concentration or the second refrigerant concentration is greater than a preset refrigerant concentration.
That is, in this embodiment, after the first refrigerant concentration of the environment where the four-way valve 21 is located is obtained by the first refrigerant detection device 3 and the second refrigerant concentration of the connection pipeline 22 is obtained by the second refrigerant detection device 4, the first refrigerant concentration and the preset refrigerant concentration are compared, and the second refrigerant concentration and the preset refrigerant concentration are compared, because part of the refrigerant is emitted to the environment where the four-way valve is located in the operation process of the air conditioner outdoor unit, that is, if the refrigerant of the air conditioner outdoor unit is leaked only through the first refrigerant detection device 3 or the second refrigerant detection device 4, it is possible that the first refrigerant detection device 3 detects that the refrigerant is present, and the second refrigerant detection device 4 detects that no refrigerant is present, so that the detected refrigerant data is inaccurate. Therefore, in this embodiment, only when the first refrigerant concentration or the second refrigerant concentration is greater than a preset refrigerant concentration, determining whether the outdoor unit of the air conditioner leaks the refrigerant according to a difference between the first refrigerant concentration and the second refrigerant concentration is performed, so as to improve accuracy of refrigerant detection.
Further, after a first refrigerant concentration and a second refrigerant concentration are obtained, if the first refrigerant concentration is less than or equal to the preset threshold and the second refrigerant concentration ratio is less than or equal to the preset threshold, it is determined that refrigerant leakage does not occur in the outdoor air conditioner, and at this time, the outdoor air conditioner is controlled to operate in a preset operation mode. The preset operation mode is the current operation mode of the air conditioner outdoor unit.
Therefore, in the embodiment, when refrigerant leakage is determined, whether the step of determining whether refrigerant leakage occurs to the outdoor unit of the air conditioner according to the difference between the first refrigerant concentration and the second refrigerant concentration is performed or not is determined by determining whether the first refrigerant concentration or the second refrigerant concentration is greater than a preset refrigerant concentration, so as to improve the accuracy of refrigerant detection.
In order to achieve the above object, the present invention further provides a storage medium storing a refrigerant detection program, wherein the performance test program of the pressure sensor is executed by a processor to implement the steps of the refrigerant detection method.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An outdoor unit of an air conditioner, comprising:
a housing;
the four-way valve assembly is arranged in the shell and is provided with a four-way valve and a connecting pipeline connected with the four-way valve;
the first refrigerant detection device is arranged in the shell and used for detecting the refrigerant concentration of the environment where the four-way valve is located;
and the second refrigerant detection device is arranged on at least one connecting pipeline and is used for detecting the refrigerant concentration on the surface of the connecting pipeline.
2. The outdoor unit of claim 1, further comprising a middle partition dividing the casing into a first chamber and a second chamber, and a compressor disposed in the second chamber, wherein the four-way valve assembly is disposed in the first chamber; the first refrigerant detection device is arranged in the first cavity.
3. The outdoor unit of claim 2, wherein the first refrigerant detecting means is disposed at an end of the middle partition plate away from the bottom of the casing.
4. The outdoor unit of claim 1, wherein the second refrigerant detecting means is located at a welding position of the connection pipe and the four-way valve.
5. The outdoor unit of claim 1, wherein the four-way valve and the connection pipe are coated with a damping member on the outer surface thereof.
6. A refrigerant detection method is characterized by comprising the following steps:
acquiring a first refrigerant concentration of an environment where the four-way valve is located through the first refrigerant detection device;
acquiring a second refrigerant concentration of the connecting pipeline through the second refrigerant detection device;
and determining whether the outdoor unit of the air conditioner leaks the refrigerant according to the difference value of the first refrigerant concentration and the second refrigerant concentration.
7. The refrigerant detecting method of claim 6, wherein the determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to the difference between the first refrigerant concentration and the second refrigerant concentration comprises:
obtaining the change rate of the difference value of the first refrigerant concentration and the second refrigerant concentration within a preset time interval;
and determining whether the outdoor unit of the air conditioner leaks the refrigerant according to the change rate.
8. The method for detecting a refrigerant according to claim 7, wherein the determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to the change rate includes:
if the change rate is larger than a preset change rate threshold value, judging that the refrigerant leaks from the outdoor unit of the air conditioner;
and if the change rate is less than or equal to a preset change rate threshold value, judging that the refrigerant leakage does not occur in the outdoor unit of the air conditioner.
9. The refrigerant detection method according to claim 6, wherein after the step of obtaining the second refrigerant concentration of the connection pipeline by the second refrigerant detection device, the method further comprises:
comparing the first refrigerant concentration with a preset refrigerant concentration, and comparing the second refrigerant concentration with the preset refrigerant concentration;
and when the first refrigerant concentration or the second refrigerant concentration is greater than a preset refrigerant concentration, executing the step of determining whether the refrigerant leakage occurs in the outdoor unit of the air conditioner according to the difference value of the first refrigerant concentration and the second refrigerant concentration.
10. A storage medium having a refrigerant detection program stored thereon, wherein the refrigerant detection program, when executed by a processor, implements the steps of the refrigerant detection method as recited in any one of claims 6 to 9.
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