CN116025999B - Air conditioner and refrigerant leakage detection method - Google Patents
Air conditioner and refrigerant leakage detection method Download PDFInfo
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- CN116025999B CN116025999B CN202310101172.7A CN202310101172A CN116025999B CN 116025999 B CN116025999 B CN 116025999B CN 202310101172 A CN202310101172 A CN 202310101172A CN 116025999 B CN116025999 B CN 116025999B
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 146
- 238000001514 detection method Methods 0.000 title claims abstract description 123
- 238000002834 transmittance Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 19
- 239000003570 air Substances 0.000 description 171
- 230000035945 sensitivity Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- KXNLCSXBJCPWGL-UHFFFAOYSA-N [Ga].[As].[In] Chemical compound [Ga].[As].[In] KXNLCSXBJCPWGL-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a refrigerant leakage detection method, and relates to the technical field of air conditioners. The air conditioner comprises an air conditioner main body, a refrigerant leakage detection device and a controller. The air conditioner main body is provided with an air outlet. The refrigerant leakage detection device comprises a light source, a reflection device and a detection device; the light source, the reflecting device and the detecting device are respectively arranged at two transverse ends of the air outlet, so that light rays emitted by the light source are reflected to the detecting device by the reflecting device, and at least two light paths transversely crossing the air outlet are formed. The controller is used for judging whether the refrigerant leaks according to the light intensity of the light detected by the detection device. The refrigerant leakage detection method provided by the invention is applied to the air conditioner, and can judge whether the refrigerant leaks according to the light intensity and the air outlet temperature of the light detected by the detection device. The air conditioner and the refrigerant leakage detection method can improve the technical problems that the detection effect on refrigerant leakage is poor and a large potential safety hazard is formed.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a refrigerant leakage detection method.
Background
With the increasing application of air conditioners to homes and working environments, air conditioners are switching to use refrigerants having low Global Warming Potential (GWP) in view of global environmental issues, but most of the refrigerants such as propane (R290) and difluoromethane (R32) having low GWP are flammable refrigerants. However, when the air conditioner uses a flammable refrigerant with a quality greater than that of air, if leakage of the indoor refrigerant occurs, the leakage speed of the refrigerant may exceed LFL according to the size of the room, whether the room has ventilation and ventilation air flow, and the concentration near the ground, so that potential safety hazards exist.
In the case of leakage of the flammable refrigerant, it is important to detect the refrigerant. In the prior art, a refrigerant sensor is provided in an indoor unit to determine whether leakage of an indoor refrigerant occurs. However, the detection method of the refrigerant sensor may be a semiconductor type or an infrared type, in which the semiconductor type is realized by detecting a change in resistance of the sensor surface after the refrigerant is absorbed, and the infrared type is realized by irradiating ambient air entering the sensor with infrared light to detect a specific light absorption wavelength of the refrigerant. However, when the refrigerant sensor is located far from the refrigerant leakage position, and the refrigerant leakage position is in a leeward position with respect to the refrigerant sensor, the leaked refrigerant may not be detected when the leaked refrigerant is difficult to reach the vicinity of the sensor. For example, when the refrigerant sensor is disposed at the central position of the air outlet in the wall-mounted indoor unit body, leakage of the refrigerant from the left end of the heat exchanger may not be detected. Also, for example, when the refrigerant sensor is disposed near the floor of a room, if items such as furniture are placed directly under the indoor unit, leaking refrigerant may be difficult to reach the sensor location. Based on the above, the detection effect on the refrigerant leakage is poor, and a large potential safety hazard is formed.
Disclosure of Invention
The invention solves the technical problems that the detection effect on refrigerant leakage is poor and a large potential safety hazard is formed in the prior art.
In order to solve the above problems, the present invention provides an air conditioner comprising:
an air conditioner main body provided with an air outlet;
The refrigerant leakage detection device comprises a light source, a reflection device and a detection device; the light source, the reflecting device and the detecting device are respectively arranged at two transverse ends of the air outlet, so that light rays emitted by the light source are reflected to the detecting device by the reflecting device, and at least two light paths transversely crossing the air outlet are formed; and
And the controller is used for judging whether the refrigerant leaks or not according to the light intensity of the light rays detected by the detection device.
Compared with the prior art, the air conditioner provided by the invention has the beneficial effects that:
Light emitted by the light source is reflected to the detection device by the reflection device, so that at least two light paths transversely crossing the air outlet are formed, the light is repeatedly transmitted along the air outlet, the purpose of prolonging the light path can be achieved, under the condition that the light path is prolonged, leaked refrigerant absorbs more light waves, the sensitivity of detecting refrigerant leakage can be improved, even if refrigerant with lower concentration leaks, the sensitivity can be detected, the detection effect on the refrigerant leakage is improved, the detection precision is improved, and therefore the technical problems that the detection effect on the refrigerant leakage in the prior art is poor and a large potential safety hazard is formed can be solved.
Optionally, the reflecting device includes at least one reflecting mirror, the reflecting mirror is disposed at a lateral end of the air outlet, and is configured to reflect light emitted by the light source to the detecting device.
The reflection of light can be realized by arranging the reflection lens, so that the manufacturing cost of the air conditioner is reduced, the detection effect of refrigerant leakage is greatly improved, and the detection precision is improved.
Optionally, the reflecting mirror plate is provided with a reflecting surface for reflecting light, and the reflecting surface is planar or concave.
Optionally, the number of the reflecting mirrors is three, wherein two reflecting mirrors are arranged at one end of the air outlet in the transverse direction, and the light source, the detection device and the other reflecting mirror are arranged at the other end of the air outlet in the transverse direction; light rays emitted by the light source are projected to the detection device after being reflected by the three reflection lenses in sequence.
Optionally, the air conditioner further comprises a temperature detection device, wherein the temperature detection device is arranged at the air outlet and is used for detecting the air outlet temperature of the air outlet; the temperature detection device is electrically connected with the controller, and the controller is used for judging whether the refrigerant at the air outlet leaks or not according to the air outlet temperature and the light intensity of the light rays detected by the detection device.
Under the condition of lower air outlet temperature, false detection of the detection device caused by higher temperature can be eliminated, and therefore the accuracy of detecting refrigerant leakage can be improved.
Optionally, the air conditioner further includes a light filter, and the light filter is disposed in front of the detection device, so that the light reflected by the reflection device passes through the light filter and is projected to the detection device; the filter is used for allowing light rays with the wavelength of 2-3 mu m or light rays with the wavelength of 3-4 mu m to pass through.
The light with the wavelength of 2-3 mu m or the light with the wavelength of 3-4 mu m passes through the optical filter, so that the influence of the light with other wavelengths on the detection precision of the detection device can be prevented, and the detection effect is improved.
Optionally, the light source is an infrared light source.
Optionally, the air conditioner further includes a driving device, the driving device is disposed on the air conditioner main body, and the reflecting device is connected to the driving device, and the driving device is used for driving the reflecting device to rotate so as to adjust an angle of light reflected by the reflecting device.
Under the condition that the reflecting angle of the reflecting device is changed, the driving device can drive the reflecting device to rotate a certain angle, so that the reflecting angle of the reflecting device is adjusted to ensure that light rays are reflected to the detecting device.
The refrigerant leakage detection method is applied to the air conditioner, and the air conditioner further comprises a temperature detection device, wherein the temperature detection device is arranged at the air outlet and is used for detecting the air outlet temperature of the air outlet;
the refrigerant leakage detection method comprises the following steps:
acquiring the light intensity of the light detected by the detection device;
Acquiring the air outlet temperature detected by the temperature detection device;
calculating the transmittance of the light rays emitted by the light source according to the light intensity;
judging whether the refrigerant at the air outlet leaks or not according to the transmittance and the air outlet temperature;
If the judgment result is yes, a leakage prompt is sent out.
Optionally, the step of judging whether the refrigerant at the air outlet leaks according to the transmittance and the air outlet temperature includes:
Judging whether the transmittance is lower than a preset value;
If the transmittance is lower than the preset value, judging whether the temperature of the air outlet is lower than a preset temperature value or not;
If the air outlet temperature is lower than the preset temperature value, judging whether the air outlet is in refrigerant leakage or not, wherein the result is yes.
Optionally, the step of acquiring the light intensity of the light detected by the detecting device includes:
and controlling the light source and the detection device to be started every preset time so as to acquire the light intensity of the light rays detected by the detection device.
The refrigerant leakage detection method is applied to the air conditioner, and the air conditioner further comprises a temperature detection device, wherein the temperature detection device is arranged at the air outlet and is used for detecting the air outlet temperature of the air outlet;
the refrigerant leakage detection method comprises the following steps:
acquiring the light intensity of the light detected by the detection device;
calculating the transmittance of the light rays emitted by the light source according to the light intensity;
Judging whether the transmittance is lower than a preset value;
if the transmittance is lower than the preset value, acquiring the air outlet temperature detected by the temperature detection device;
Judging whether the temperature of the air outlet is lower than a preset temperature value or not;
And if the air outlet temperature is lower than the preset temperature value, sending out a leakage prompt.
The beneficial effects of the refrigerant leakage detection method provided by the invention relative to the prior art are the same as those of the air conditioner provided by the invention relative to the prior art, and are not repeated here.
Drawings
Fig. 1 is a schematic structural view of an air conditioner according to a first embodiment of the present application;
FIG. 2 is a flow chart of a refrigerant leakage detecting method according to a second embodiment of the present application;
FIG. 3 is a flowchart of step S4 in the refrigerant leakage detecting method according to the second embodiment of the present application;
fig. 4 is a flowchart of a refrigerant leakage detecting method according to a third embodiment of the present application.
Reference numerals illustrate:
10-an air conditioner; 100-an air conditioner main body; 101-an air outlet; 200-refrigerant leakage detection device; 210-a light source; 220-reflecting means; 221-a mirror plate; 230-detection means.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
First embodiment
Referring to fig. 1, an air conditioner 10 is provided in this embodiment, and the air conditioner 10 can improve the technical problems of poor detection effect on refrigerant leakage and large potential safety hazard in the prior art. In other words, the air conditioner 10 provided in this embodiment can improve the sensitivity of detecting the refrigerant, so as to improve the detection effect on the refrigerant leakage and eliminate the potential safety hazard. Alternatively, the air conditioner 10 provided in the present embodiment may be a cabinet air conditioner 10, a wall-mounted air conditioner 10, or a patio-buried air conditioner 10.
In the present embodiment, the air conditioner 10 includes an air conditioner main body 100, a refrigerant leakage detecting device 200, and a controller. The air conditioner main body 100 is provided with an air outlet 101, wherein the air outlet 101 can provide air outlet for the air conditioner main body 100 to provide air conditioning effect through the area where the air conditioner 10 is installed. It should be noted that, before the air flow is led out from the air outlet 101, the air flow will pass through the heat exchanger inside the air conditioner main body 100, if the heat exchanger leaks refrigerant, the leaked refrigerant will exist at the air outlet 101, based on which the refrigerant can be detected at the air outlet 101, so as to improve the detection effect. The refrigerant leakage detecting device 200 includes a light source 210, a reflecting device 220, and a detecting device 230. The light source 210, the reflecting device 220 and the detecting device 230 are respectively disposed at two lateral ends of the air outlet 101, so that the light emitted by the light source 210 is reflected by the reflecting device 220 to the detecting device 230, and at least two light paths transversely crossing the air outlet 101 are formed. It should be noted that, the lateral direction of the air outlet 101 refers to the lateral direction of the air outlet 101 in the case where the air conditioner main body 100 is normally installed inside the designated area. It should be noted that, the "light path" refers to a light path formed by projecting light from one end of the air outlet 101 to the other end of the air outlet 101, and at least two light paths can be formed in the lateral direction of the air outlet 101 by reflection when the reflecting device 220 is disposed. The detecting device 230 is electrically connected to a controller, and the controller is configured to determine whether the refrigerant leaks according to the light intensity of the light detected by the detecting device 230.
Based on the above provided air conditioner 10, the light emitted by the light source 210 is reflected by the reflecting device 220 to the detecting device 230, so that at least two light paths transversely crossing the air outlet 101 are formed, the light is repeatedly transmitted transversely along the air outlet 101, the purpose of prolonging the light path can be achieved, under the condition that the light path is prolonged, the leaked refrigerant at the air outlet 101 can absorb more light waves under the condition that the refrigerant leaks, and further the sensitivity of detecting the refrigerant leakage can be improved, even if the refrigerant with lower concentration leaks, the refrigerant leakage can be detected, the detecting effect on the refrigerant leakage is improved, and the detecting precision is improved, so that the technical problems of poor detecting effect on the refrigerant leakage and large potential safety hazard in the prior art can be improved.
It should be noted that, in the embodiment, when the light emitted by the light source 210 passes through the refrigerant in the air, part of the light wave is absorbed by the refrigerant, and therefore, after at least one reflection, the light can be irradiated along the transverse direction of the air outlet 101 multiple times. If refrigerant leakage exists, the quantity of light waves absorbed by the refrigerant can be improved due to the extension of the light path, and then the absorbed light waves can be detected under the condition of less refrigerant leakage quantity, so that the sensitivity of detecting the refrigerant leakage can be improved, and the detection effect on the refrigerant leakage can be improved. That is, when the air outlet 101 has a leakage phenomenon, part of the light waves in the light emitted from the light source 210 are absorbed by the leaked refrigerant, so that the light intensity of the light detected by the detecting device 230 changes, and thus whether the refrigerant leaks can be determined according to the light intensity detected by the detecting device 230.
Generally, if there is a refrigerant leakage phenomenon, the refrigerant leaks from the heat exchanger of the air conditioner 10, and the leaked refrigerant is blown to the air outlet 101 of the air conditioner 10 through the guiding of the air flow, so the refrigerant leakage detecting device 200 can detect whether the air conditioner 10 has a refrigerant leakage problem only by detecting whether the refrigerant exists at the air outlet 101. It should be appreciated that, since the refrigerant is diffused in the leaked area after leakage, the refrigerant leakage detecting device 200 provided by the present application can sensitively detect the refrigerant even if the concentration of the refrigerant is low, and based on this, even if the refrigerant leakage occurs in other positions in the area where the air conditioner 10 is located, the refrigerant leakage detecting device 200 can effectively detect the refrigerant as well and achieve the effect of accurately judging whether the refrigerant is leaked.
In the present embodiment, the light source 210 is an infrared light source 210. That is, the light source 210 may emit infrared laser light, and its wavelength needs to correspond to the refrigerant absorption wavelength. For example, for R32 refrigerant, the peak of the absorption infrared wavelength is 2.2 μm, 2.4 μm, 3.3 μm, 9.1 μm 4 infrared absorption bands, wherein for 3.3 μm, infrared LED L15893-0330ML manufactured by Kokai Song photonics (Japan) can be used. For 2.2 μm, 2.4 μm, and 3.3 μm, a medium infrared DFB laser manufactured by NORCADA (canada) was used as the light source 210. For example, the R290 refrigerant has a peak wavelength of 3.4 μm and 6.8 μm 2 infrared absorption bands for absorbing infrared light. For the infrared absorption band of 3.4 μm corresponding to the R290 refrigerant, a medium infrared DFB laser manufactured by Nanosystems and Technologies GmbH (germany) nanoplus or NORCADA (canada) having an infrared emission peak wavelength of 3.4 μm can be used as the corresponding light source 210.
It should be appreciated that in other embodiments, other light sources 210 that generate light that can be absorbed by the refrigerant may be used for the light source 210.
In this embodiment, the reflecting device 220 includes at least one reflecting mirror 221, and the reflecting mirror 221 is disposed at a lateral end of the air outlet 101 and is configured to reflect the light emitted by the light source 210 to the detecting device 230. The reflection of light can be realized by arranging the reflecting mirror 221, so that the manufacturing cost of the air conditioner 10 is reduced, the detection effect of refrigerant leakage is greatly improved, and the detection precision is improved.
It should be noted that, for the selection of the reflection mirror 221, the reflection mirror 221 only needs to reflect infrared light with high efficiency. Preferably, from the viewpoint of optical axis stabilization, a mirror having a glass surface on which a protective film is formed by aluminum deposition may be used.
Alternatively, the reflecting mirror 221 has a reflecting surface for reflecting light, and the reflecting surface is planar or concave. The reflection lens 221 with the concave reflection surface can efficiently collect the light emitted by the light source 210, so as to improve the detection sensitivity and further improve the detection effect. The use of the reflection lens 221 having a planar shape can reduce the manufacturing cost and improve the safety factor.
In the present embodiment, the number of the reflection mirrors 221 is three, wherein two reflection mirrors 221 are disposed at one end of the air outlet 101 in the transverse direction, and the light source 210, the detection device 230 and the other reflection mirror 221 are disposed at the other end of the air outlet 101 in the transverse direction; the light emitted by the light source 210 is reflected by the three reflection mirrors 221 in sequence and then projected to the detection device 230. In this case, taking fig. 1 as an example, two reflection mirrors 221 are disposed at the left side of the air outlet 101, and a light source 210, a reflection mirror 221, and a detection device 230 are disposed at the right side of the air outlet 101. The light emitted from the light source 210 is preferentially projected to one of the left reflection mirrors 221, and is reflected to the right reflection mirror 221 through the reflection mirror 221; the right mirror 221 reflects the light to the left mirror 221, and then the light is reflected to the detecting device 230; thereby forming four light paths.
It should be appreciated that in other embodiments of the application, the number of mirror plates 221 may also be adjusted. For example, only one reflection mirror 221 is provided, and at this time, the reflection mirror 221 is provided at one end of the air outlet 101 in the lateral direction, and the detection device 230 and the light source 210 are provided at the other end of the air outlet 101 in the lateral direction; the light emitted from the light source 210 is reflected by the reflection mirror 221 and then received by the detection device 230, and two light paths are formed. For another example, two reflection lenses 221 may be provided; at this time, one of the reflecting plates 221 and the light source 210 are disposed at one end of the air outlet 101 in the lateral direction, and the detecting device 230 and the other reflecting plate 221 are disposed at the other end of the air outlet 101 in the lateral direction; the light emitted from the light source 210 is reflected by the two reflection mirrors 221 and then received by the detection device 230, and three light paths are formed. Of course, a greater number of mirror plates 221 may also be provided.
It is noted that, considering that the light intensity of the light after being reflected many times is weakened, excessive reflection may cause difficulty in stably detecting the light, and the number of reflections should preferably be less than or equal to 5 times.
In this embodiment, if the air conditioner 10 is a patio embedded air conditioner 10, the reflection device 220 can reflect the propagation path of the infrared ray to the water pan 3-4 weeks surrounding the patio embedded air conditioner 10, so as to achieve the purpose of prolonging the light path, and ensure that each air outlet 101 of the patio embedded air conditioner 10 can be detected, so as to improve the accuracy and sensitivity of the refrigerant leakage detection.
In addition, the air conditioner 10 further includes a driving device disposed on the air conditioner main body 100, and the reflecting device 220 is connected to the driving device, where the driving device is used for driving the reflecting device 220 to rotate so as to adjust the angle of the light reflected by the reflecting device 220. Alternatively, the driving means may be a driving motor. The driving motor may be electrically connected to the controller, and the reflection angle of the reflection means 220 may be adjusted based on the control of the controller. It should be noted that in the case where the number of the reflection mirrors 221 is two, three, or more, one driving means may be provided for each reflection mirror 221.
In the case that the reflection angle of the reflecting device 220 is changed, the driving device may drive the reflecting device 220 to rotate a certain angle, so as to adjust the reflection angle of the reflecting device 220, so as to ensure that the light is reflected to the detecting device 230. For example, after the air conditioner 10 is used for a long time, the optical axis of the reflection lens 221 is deviated, which results in the influence of the reflection angle of the light, and thus the detection accuracy is lowered; based on this, the reflection angle of the reflection plate 221 is adjusted by providing the driving means to ensure that the light is stably received by the detecting means 230.
It should be understood that in other embodiments of the application, the provision of the drive means may be eliminated.
In addition, the air conditioner 10 further includes a filter disposed in front of the detecting device 230, so that the light reflected by the reflecting device 220 passes through the filter and is projected to the detecting device 230; the filter is used for passing light with a wavelength of 2-3 μm or light with a wavelength of 3-4 μm. The optical filter is used for allowing light with the wavelength of 2-3 μm or light with the wavelength of 3-4 μm to pass through, so that the influence of light with other wavelengths on the detection precision of the detection device 230 can be prevented, and the detection effect is improved.
For example, in the present embodiment, when the R32 refrigerant uses 2.4 μm infrared light, if a broadband filter that transmits 2 to 3 μm is used, the light emitted from the light source 210 can be efficiently collected while other light can be prevented from entering the detector. When the R290 refrigerant is 3.4 μm infrared light, an infrared 3.4 μm filter manufactured by Edmond Optics Inc. (U.S.) may be used.
In this embodiment, the detector 230 may be a bolometer detector for detecting a change in temperature impedance, a thermopile detector for detecting a change in thermal electromotive force, a pyroelectric detector using the principle of pyroelectricity, a photo-semiconductor detector using photo-electromotive force of a photo-semiconductor such as indium gallium arsenide (InGaAs), or the like, and it is preferable that the cost of the bolometer detector, the pyroelectric detector, and the thermopile detector be low.
In this embodiment, the air conditioner 10 further includes a temperature detecting device, which is disposed at the air outlet 101, for detecting the air outlet temperature of the air outlet 101; the temperature detecting device is electrically connected to the controller, and the controller is configured to determine whether the refrigerant leaks from the air outlet 101 according to the air outlet temperature and the light intensity of the light detected by the detecting device 230. Under the condition of lower air outlet temperature, false detection of the detection device 230 caused by higher temperature can be eliminated, so that the accuracy of detecting refrigerant leakage can be improved. Of course, in other embodiments of the present application, the provision of the temperature detecting device may be eliminated.
It should be noted that, since the leakage of the refrigerant may occur during the operation of the air conditioner 10, or may occur in the case of standby or shutdown of the air conditioner 10, the detection of the leakage of the refrigerant may be independent of the operation of the air conditioner 10 based on this; that is, the controller may independently control the refrigerant leakage detecting device 200 to operate in the operating state of the air conditioner 10; the controller may also independently control the operation of the refrigerant leakage detecting device 200 when the air conditioner 10 is in a standby or a stopped state.
In summary, in the air conditioner 10 provided in the embodiment of the application, the light emitted by the light source 210 is reflected by the reflecting device 220 to the detecting device 230, so that at least two light paths transversely crossing the air outlet 101 are formed, and the light is repeatedly transmitted transversely along the air outlet 101, so that the purpose of prolonging the light path of the light is achieved. In addition, by providing the driving device to adjust the reflection angle of the reflection mirror 221, the reflection angle of the reflection mirror 221 can be adjusted in the case that the optical axis of the reflection mirror 221 deviates, so as to ensure that the detection device 230 can stably receive the infrared light. In addition, by arranging the temperature detection device to eliminate false detection of the detection device 230 caused by higher temperature, the accuracy of detecting the refrigerant leakage can be improved.
Second embodiment
Referring to fig. 2, based on the air conditioner 10 provided in the first embodiment, a refrigerant leakage detection method is provided in the present embodiment to detect whether the air conditioner 10 has refrigerant leakage, so as to improve the technical problems of poor refrigerant leakage detection effect and large potential safety hazard in the prior art.
It should be noted that, in the present embodiment, a temperature detecting device is provided in the air conditioner 10 to detect the air outlet temperature of the air outlet 101, and send the detected air outlet temperature to the controller.
In this embodiment, the refrigerant leakage detection method includes:
S1, acquiring the light intensity of the light detected by the detection device 230.
In the case that the light source 210 is turned on, the light intensity of the light is detected by the detecting device 230, and the detected light intensity of the light is transmitted to the controller.
Alternatively, in some embodiments of the present application, in step S1, the light source 210 and the detecting device 230 may be controlled to be turned on at intervals of a preset time to obtain the light intensity of the light detected by the detecting device 230. In other words, the refrigerant leakage can be detected every predetermined time, so as to prolong the service lives of the light source 210 and the detecting device 230 in the refrigerant leakage detecting device 200.
Optionally, the value of the preset time can be 0.5min-20min; in other words, the preset time may be 0.5min、1min、2min、3min、4min、5min、6min、7min、8min、9min、10min、11min、12min、13min、14min、15min、16min、17min、18min、19min or 20 min. Preferably, the preset time takes a value of 1min in consideration of the security of the user as the first priority.
S2, acquiring the air outlet temperature detected by the temperature detection device.
The temperature detection device detects the outlet air temperature of the outlet air port 101, and sends the detected outlet air temperature to the controller.
S3, calculating the transmittance of the light emitted by the light source 210 according to the light intensity.
The controller may calculate the transmittance of the light during the propagation according to the initial light intensity of the light emitted from the light source 210 after receiving the light intensity of the light detected by the detecting device 230. If the refrigerant leaks in the air outlet 101, the transmittance of the light is lower; if no refrigerant leakage exists in the air outlet 101, the transmittance of light is high.
S4, judging whether the refrigerant at the air outlet 101 leaks or not according to the transmittance and the air outlet temperature.
Optionally, referring to fig. 3, step S4 may include:
s41, judging whether the transmittance is lower than a preset value;
Optionally, the preset value may be 95% -90%; in other words, the preset value may be 95%, 94%, 93%, 92%, 91% or 90%, etc. Wherein the preset value is preferably 95%.
When the transmittance is lower than the preset value, the absorption of a large amount of light waves by leaked refrigerant in the propagation process is indicated, so that the existence of refrigerant leakage can be primarily judged.
S42, if the transmittance is lower than the preset value, judging whether the temperature of the air outlet is lower than the preset temperature value;
If the transmittance is lower than the preset value, that is, if the determination result in step S41 is yes, it may be determined whether there is a situation that the temperature of the air outlet 101 is too high to cause the detection device 230 to perform false detection according to the air outlet temperature; therefore, the judgment can be made based on the magnitude relation between the air outlet temperature and the preset temperature value. That is, if the temperature is lower than the preset temperature value, it means that there is no false detection caused by the temperature influence of the detection device 230, and it is possible to determine that there is a refrigerant leakage.
Alternatively, the preset temperature value may be 8℃to 15℃or, in other words, 8℃9℃10℃11℃12℃13℃14℃15℃or the like. Preferably, the preset temperature value is 10 ℃.
S43, if the air outlet temperature is lower than the preset temperature value, judging whether the air outlet 101 is in the refrigerant leakage state.
That is, if the determination result in step S42 is yes, it is determined whether the air outlet 101 is leaking refrigerant.
S5, if the judgment result is yes, a leakage prompt is sent out.
Alternatively, the leakage prompt may be a prompt message sent to the mobile terminal of the user, or may be a buzzer or a flashing light sent from the air conditioner 10.
It should be noted that, in other embodiments, if the determination result in step S42 is no, that is, if the air outlet temperature is greater than or equal to the preset temperature value, there may be a situation that the detection device 230 is erroneously detected due to the excessively high temperature of the air outlet 101; based on this, the air conditioner 10 may be controlled to execute other modes, in which the temperature of the air outlet 101 is reduced to be lower than the preset temperature value, and then the above steps S1 to S5 are executed, so as to improve the accuracy of the judgment.
Third embodiment
Referring to fig. 4, based on the air conditioner 10 provided in the first embodiment, a refrigerant leakage detection method is further provided in this embodiment to detect whether the air conditioner 10 has refrigerant leakage, so as to improve the technical problem that the detection effect on refrigerant leakage is poor and a larger potential safety hazard is formed in the prior art.
Compared with the refrigerant leakage detection method provided in the second embodiment, the refrigerant leakage detection method provided in the present embodiment is different in the acquisition time of the air outlet temperature. In other words, the content not mentioned in the present embodiment can be referred to as the related content in the second embodiment.
In this embodiment, the refrigerant leakage detection method includes:
S10, acquiring the light intensity of the light detected by the detection device 230;
S20, calculating the transmittance of the light emitted by the light source 210 according to the light intensity;
S30, judging whether the transmittance is lower than a preset value;
s40, if the transmittance is lower than a preset value, acquiring the air outlet temperature detected by the temperature detection device;
S50, judging whether the temperature of the air outlet is lower than a preset temperature value;
S60, if the temperature of the air outlet is lower than a preset temperature value, a leakage prompt is sent out.
That is, the controller obtains the air outlet temperature of the air outlet 101 only when the calculated transmittance of the light is lower than the preset value, so as to eliminate the problem of false detection of the detecting device 230 caused by the excessively high air outlet temperature. In the case of a high transmittance, no refrigerant leakage occurs at this time, and the temperature of the air outlet 101 does not need to be detected, and the air outlet temperature does not need to be obtained. Based on the method, the execution difficulty of refrigerant leakage judgment can be reduced, and further the execution cost is reduced.
It should be noted that, in several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, of the flowcharts and block diagrams in the figures that illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. 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.
In addition, functional modules in the embodiments of the present invention may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (11)
1. An air conditioner, comprising:
An air conditioner main body (100) provided with an air outlet (101);
A refrigerant leakage detection device (200) comprising a light source (210), a reflection device (220) and a detection device (230); the light source (210), the reflecting device (220) and the detecting device (230) are respectively arranged at two transverse ends of the air outlet (101), so that light rays emitted by the light source (210) are reflected to the detecting device (230) by the reflecting device (220), and at least two light paths transversely crossing the air outlet (101) are formed; and
And the detection device (230) is electrically connected with the controller, and the controller is used for judging whether the refrigerant leaks according to the light intensity of the light detected by the detection device (230).
2. The air conditioner according to claim 1, wherein the reflecting device (220) comprises at least one reflecting plate (221), and the reflecting plate (221) is disposed at a lateral end of the air outlet (101) and is configured to reflect the light emitted by the light source (210) to the detecting device (230).
3. An air conditioner according to claim 2, wherein the reflecting mirror plate (221) has a reflecting surface for reflecting light, and the reflecting surface is planar or concave.
4. The air conditioner according to claim 2, wherein the number of the reflecting mirrors (221) is three, wherein two of the reflecting mirrors (221) are disposed at one end of the air outlet (101) in the lateral direction, and the light source (210), the detecting device (230), and the other reflecting mirror (221) are disposed at the other end of the air outlet (101) in the lateral direction; light rays emitted by the light source (210) are reflected by the three reflecting lenses (221) in sequence and then projected to the detection device (230).
5. An air conditioner according to any one of claims 1-4, wherein the air conditioner (10) further comprises a temperature detection device provided at the air outlet (101) for detecting an air outlet temperature of the air outlet (101); the temperature detection device is electrically connected with the controller, and the controller is used for judging whether the air outlet (101) leaks refrigerant according to the air outlet temperature and the light intensity of the light rays detected by the detection device (230).
6. The air conditioner according to any one of claims 1 to 4, wherein the air conditioner (10) further includes a filter disposed in front of the detection device (230) such that the light reflected by the reflection device (220) is projected to the detection device (230) through the filter; the filter is used for allowing light rays with the wavelength of 2-3 mu m or light rays with the wavelength of 3-4 mu m to pass through.
7. An air conditioner according to any one of claims 1-4, wherein the light source (210) is an infrared light source (210).
8. An air conditioner according to any one of claims 1 to 4, wherein the air conditioner (10) further comprises a driving device, the driving device is arranged on the air conditioner main body (100), the reflecting device (220) is connected to the driving device, and the driving device is used for driving the reflecting device (220) to rotate so as to adjust the angle of the light reflected by the reflecting device (220).
9. A refrigerant leakage detection method, characterized in that it is applied to an air conditioner (10) according to any one of claims 1-4 and 6-8, and the air conditioner (10) further comprises a temperature detection device, the temperature detection device is arranged at the air outlet (101) for detecting the air outlet temperature of the air outlet (101);
the refrigerant leakage detection method comprises the following steps:
Acquiring the light intensity of the light detected by the detection device (230);
Acquiring the air outlet temperature detected by the temperature detection device;
Calculating the transmittance of the light emitted by the light source (210) according to the light intensity;
judging whether the air outlet (101) is leaked by a refrigerant according to the transmittance and the air outlet temperature;
the step of judging whether the air outlet (101) is leaked by the refrigerant according to the transmittance and the air outlet temperature comprises the following steps:
Judging whether the transmittance is lower than a preset value;
If the transmittance is lower than the preset value, judging whether the temperature of the air outlet is lower than a preset temperature value or not;
if the air outlet temperature is lower than the preset temperature value, judging whether the air outlet (101) is in refrigerant leakage or not, wherein the result is yes;
If the judgment result is yes, a leakage prompt is sent out.
10. The refrigerant leakage detecting method according to claim 9, wherein the step of acquiring the light intensity of the light detected by the detecting means (230) includes:
The light source (210) and the detection device (230) are controlled to be turned on at preset time intervals so as to acquire the light intensity of the light detected by the detection device (230).
11. A refrigerant leakage detection method, characterized in that it is applied to an air conditioner (10) according to any one of claims 1-4 and 6-8, and the air conditioner (10) further comprises a temperature detection device, the temperature detection device is arranged at the air outlet (101) for detecting the air outlet temperature of the air outlet (101);
the refrigerant leakage detection method comprises the following steps:
Acquiring the light intensity of the light detected by the detection device (230);
Calculating the transmittance of the light emitted by the light source (210) according to the light intensity;
Judging whether the transmittance is lower than a preset value;
if the transmittance is lower than the preset value, acquiring the air outlet temperature detected by the temperature detection device;
Judging whether the temperature of the air outlet is lower than a preset temperature value or not;
And if the air outlet temperature is lower than the preset temperature value, sending out a leakage prompt.
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| US10119738B2 (en) | 2014-09-26 | 2018-11-06 | Waterfurnace International Inc. | Air conditioning system with vapor injection compressor |
| US11592215B2 (en) | 2018-08-29 | 2023-02-28 | Waterfurnace International, Inc. | Integrated demand water heating using a capacity modulated heat pump with desuperheater |
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