CN108344081B - Air conditioner and safety detection method - Google Patents
Air conditioner and safety detection method Download PDFInfo
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- CN108344081B CN108344081B CN201710054808.1A CN201710054808A CN108344081B CN 108344081 B CN108344081 B CN 108344081B CN 201710054808 A CN201710054808 A CN 201710054808A CN 108344081 B CN108344081 B CN 108344081B
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and a safety detection method, and belongs to the technical field of air conditioners. The air conditioner includes the casing and sets up electrochemical compressor, metal hydride heat exchanger and hydrogen leakage detection device in the casing, and hydrogen saturation detection device includes: the hydrogen saturation detection device comprises an inductor and a controller, wherein the controller is used for detecting the current change of the electric conductor and determining the saturation of the hydrogen according to the current change. The hydrogen saturation detection device provided by the invention can be used for judging whether the hydrogen in the metal hydride heat exchanger is saturated or not by utilizing the characteristic that the electrical conductivity can change after the metal hydride absorbs hydrogen and detecting the current change of the section of electrical conductor, so that the voltage reversal of the electrochemical compressor can be controlled when the saturation is reached, and the hydrogen can be continuously and stably circulated in an air conditioning system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a safety detection method.
Background
At present, the electrochemical compressor technology has been gradually applied to the technical field of air conditioners, and the principle of the electrochemical compressor is as follows: operating by pumping protons through an ion exchange membrane located between two gas diffusion electrodes, the protons driving a non-fluorine refrigerant through the ion exchange membrane; after the refrigerant reaches the other side of the membrane, it is released at high pressure into the refrigeration cycle. In the air-conditioning structure adopting the electrochemical compressor, hydrogen is mostly used as a refrigerating medium, and the metal hydride is filled in the heat exchanger, and has the characteristics of hydrogen absorption and heat release and hydrogen desorption, so that the temperature of the air flowing through is increased or reduced in the hydrogen absorption or hydrogen desorption process of the metal hydride.
However, since the metal hydride itself has a limit in the saturation degree of hydrogen absorption, for example, when the metal hydride heat exchanger reaches the upper limit of the amount of hydrogen absorption, the other metal hydride heat exchanger which exchanges hydrogen with the other metal hydride heat exchanger can not continuously refrigerate and cool the air which flows through the other metal hydride heat exchanger, in order to ensure the continuous refrigeration of the indoor environment, so that most of the existing air conditioners adopting electrochemical compressors are provided with a plurality of groups of metal hydride heat exchangers, when one group of metal hydride is saturated, the other group of metal hydride heat exchanger is switched to continue hydrogen exchange so as to carry out refrigeration cycle, the switching process is mostly realized by switching the voltage direction of the electrochemical compressor, and the periods of the voltage switching of the electrochemical compressor are different due to different hydrogen input rates when the electrochemical compressor operates under different refrigeration temperatures, therefore, how to judge the voltage switching time point of the electrochemical compressor is important for maintaining the operation of the air conditioner.
Disclosure of Invention
The invention discloses an air conditioner and a safety detection method, aiming at controlling the voltage switching of an electrochemical compressor according to the hydrogen saturation of metal hydride. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the invention, an air conditioner is provided, which comprises a casing, an electrochemical compressor, at least two metal hydride heat exchangers and a hydrogen saturation detection device, wherein the electrochemical compressor, the at least two metal hydride heat exchangers and the hydrogen saturation detection device are arranged in the casing; the hydrogen saturation detection device includes: an inductor disposed in the chamber and including a conductor made of metal hydride and a power supply unit for supplying power to the conductor at a stable voltage; and the controller is electrically connected with the inductor and is used for detecting the current change of the electric conductor and determining the saturation of the hydrogen according to the current change.
Further, the controller determines the saturation of the hydrogen according to the current change condition, and comprises: and matching the current values of the electric conductors in the incidence relation according to the incidence relation between the preset current values and the hydrogen saturation, and determining the hydrogen saturation corresponding to the current values.
Further, the controller is also configured to control switching of the voltage direction of the electrochemical compressor based on the determined hydrogen saturation.
Further, the chamber is provided with a port for hydrogen to enter and exit, and the sensor is arranged at one end of the chamber far away from the port.
Further, the inductor comprises one or more conductors, and the conductors are arranged at intervals and gradually increase in distance from the port.
According to a second aspect of the present invention, there is also provided a safety inspection method of an air conditioner using an electrochemical compressor, comprising: acquiring a current value of an electric conductor composed of metal hydride; matching the current value of the electric conductor in the incidence relation according to the incidence relation between the preset current value and the hydrogen saturation, and determining the hydrogen saturation corresponding to the current value; and controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation.
Further, obtaining a current value of the electric conductor composed of the metal hydride includes: acquiring the current value of a conductor of an inductor in the metal hydride heat exchanger in a hydrogen absorption state; controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation, the process comprising: and controlling to switch the voltage direction of the electrochemical compressor when the current value is not greater than a preset first current threshold value.
Further, obtaining a current value of the electric conductor composed of the metal hydride includes: acquiring the current value of a conductor of an inductor in the metal hydride heat exchanger in a hydrogen discharge state; controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation, the process comprising: and when the current value is larger than a preset second current threshold value, controlling to switch the voltage direction of the electrochemical compressor.
The hydrogen saturation detection device provided by the invention can be used for judging whether the hydrogen in the metal hydride heat exchanger is saturated or not by utilizing the characteristic that the electrical conductivity can change after the metal hydride absorbs hydrogen and detecting the current change of the section of electrical conductor, so that the voltage reversal of the electrochemical compressor can be controlled when the saturation is reached, and the hydrogen can be continuously and stably circulated in an air conditioning system.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view illustrating a hydrogen saturation detecting apparatus of an air conditioner of the present invention according to an exemplary embodiment;
FIG. 2 is a flow diagram illustrating a security detection method of the present invention in accordance with an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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, 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 or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
As shown in fig. 1, the present invention provides an air conditioner using an electrochemical compressor, the air conditioner includes a casing, an electrochemical compressor 3 disposed in the casing, at least two metal hydride heat exchangers 4, and a hydrogen saturation detection device, the electrochemical compressor 3 is connected to the two metal hydride heat exchangers 4 through a hydrogen pipeline, the metal hydride heat exchangers 4 have a chamber filled with metal hydride; the detection device can be used for detecting the hydrogen saturation of the metal hydride filled in the metal hydride heat exchanger 4 of the air conditioner, the inductor 1 of the detection device is arranged in the cavity of each metal hydride heat exchanger 4, and the electric conductor of the inductor 1 can be contacted with the hydrogen in the cavity, so that the inductor and other heat exchangers can synchronously absorb the hydrogen or release the hydrogen to reflect the real-time hydrogen content condition of the metal hydride.
In the embodiment, the detection device comprises an inductor 1 and two main parts for controlling, wherein the inductor 1 comprises a conductive body formed by metal hydride and a power supply part for supplying power to the conductive body; the controller 2 is electrically connected with the inductor 1 and is used for detecting the current change of the electric conductor and determining the saturation of the hydrogen according to the current change. The detection device can determine the real-time hydrogen absorption amount of the metal hydride by detecting the real-time current of the electric conductor, and further can judge the hydrogen saturation of the metal hydride, so that when the hydrogen reaches the upper hydrogen absorption limit, the direction of the working voltage of the electrochemical compressor 3 is controlled and switched, the hydrogen starts to be reversely conveyed, and the metal hydride which reaches the hydrogen absorption saturation is also converted into the hydrogen releasing and heat absorbing state. The invention controls the voltage commutation of the electrochemical compressor 3 according to the real-time hydrogen saturation condition, can enable the metal hydride to absorb hydrogen with the maximum hydrogen absorption amount, prolongs the interval duration of voltage switching, reduces the frequency of frequent voltage commutation switching, and prolongs the service life of each part of the air conditioner.
The working principle of the detection device is as follows: the metal type metal hydride has stronger hydrogen absorption performance, the self conductivity of the metal type metal hydride after hydrogen absorption can be changed, and the more hydrogen is absorbed by the metal type metal hydride, the lower the conductivity of the metal type metal hydride is; the induction device of the invention adopts metal hydride to make into a conductor, which can have two functions of absorbing hydrogen and conducting, the induction device is arranged in a metal hydride heat exchanger 4, the conductor can absorb hydrogen and release hydrogen together with the metal hydride filled in the heat exchanger, after the conductor made of metal hydride absorbs hydrogen, the conductivity of the conductor changes with the change, and the current change of a detection circuit can be caused, therefore, the absorption amount of hydrogen can be judged by detecting the current value passed by the conductor, when the conductor does not reach the upper limit of the hydrogen absorption amount, the current value detected by a controller 2 is continuously reduced, and when the conductor reaches the upper limit of the self hydrogen absorption amount, the conductor does not absorb hydrogen, the current value detected by the controller 2 gradually tends to be stable, therefore, the controller 2 can judge that the metal hydride heat exchanger 4 of the air conditioner reaches the hydrogen absorption saturation state, meanwhile, the electrochemical compressor 3 can control and switch the direction of the working voltage of the electrochemical compressor when the controller 2 judges that the metal hydride reaches hydrogen absorption saturation, so that the hydrogen is reversely conveyed.
In one embodiment of the present invention, the controller 2 determines the saturation of hydrogen according to the current variation, and the specific process includes: and matching the current values of the electric conductors in the incidence relation according to the incidence relation between the preset current values and the hydrogen saturation, and determining the hydrogen saturation corresponding to the current values. When the electric conductor does not reach the upper limit of the hydrogen absorption amount, the current value is gradually reduced along with the increase of the hydrogen absorption amount, so that the real-time hydrogen absorption amount corresponding to different current values of the electric conductor can be determined in advance through experiments, the electric conductor is made of the same or similar material as the metal hydride filled in the metal hydride heat exchanger 4, therefore, the actual hydrogen absorption amount of the electric conductor can be used as a sample to reflect the whole hydrogen absorption amount condition of the metal hydride in the metal hydride heat exchanger 4, when the electric conductor reaches the upper limit of the hydrogen absorption amount, the other metal hydrides can be judged to reach the upper limit of the hydrogen absorption, and at the moment, the working voltage direction of the electrochemical compressor 3 needs to be switched.
In an embodiment, the controller 2 is further configured to control switching of the voltage direction of the electrochemical compressor based on the determined hydrogen saturation. For example, when it is determined that the metal hydride in the chamber of a certain metal hydride heat exchanger in the hydrogen absorption state reaches a set hydrogen saturation threshold value, the voltage of the electrochemical compressor is controlled to be reversely switched, and hydrogen is reversely delivered, so that the metal hydride heat exchanger is also switched to the hydrogen release state.
In another embodiment of the present invention, after the electrical conductor reaches the upper limit of the hydrogen absorption amount, the performance of the electrical conductor tends to be stable, and the value of the passing current thereof also gradually stabilizes, so that another process of the controller 2 determining the saturation of the hydrogen gas according to the change of the current is as follows: detecting the current change condition of the electric conductor within a set time, and judging that the metal hydride reaches a hydrogen saturation state when the current change quantity of the electric conductor is lower than the set current change quantity; for example, the set time period may be 3 minutes, 5 minutes, or the like, the set current variation amount is 5mA, and the current variation amount is 1mA for a certain time period, it may be determined that the metal hydride in the metal hydride heat exchanger 4 has reached the upper limit of the hydrogen absorption amount.
The current value detected by the controller 2 is not only influenced by the conductivity of the conductor itself, but also influenced by the voltage value applied by the power supply unit, and in order to reduce the influence of current interference generated by the voltage unit, the power supply unit of the present invention supplies power to the conductor with a stable voltage to reduce the influence of other variable factors in the current detection process.
Because the metal hydride filled in the cavity has certain electrical conductivity, in order to avoid the change of current of the electric conductor caused by the metal hydride, the invention is provided with the cover shell outside the electric conductor for preventing the electric conductor from directly contacting with other metal hydrides, but can ensure that the electric conductor can contact with hydrogen in the cavity, so that the electric conductor can absorb the hydrogen from the cavity or release the hydrogen.
In one embodiment of the invention, the chamber has a port 5 for hydrogen ingress and egress, the inductor 1 is disposed at an end of the chamber remote from the port 5, and the metal hydride heat exchanger 4, when in a hydrogen absorption state, hydrogen entering the chamber from port 5 will be preferentially absorbed by the metal hydride near port 5, the further away from port 5, the lower the hydrogen concentration, the less hydrogen the metal hydride can absorb, the metal hydride near the port 5 will reach the upper limit of the amount of hydrogen absorption first, the metal hydride far from the port 5 will reach the upper limit of the amount of hydrogen absorption last, in order to ensure that the metal hydride heat exchanger 4 can absorb hydrogen gas with the maximum amount of hydrogen absorption, the present invention places the electrical conductor of the inductor 1 at one end of the chamber remote from the port 5, when the electric conductor reaches the upper limit of the hydrogen absorption amount, it can be considered that the entire metal hydride filled in the metal hydride heat exchanger 4 has reached the saturated state.
Since the filling density of the metal hydride at different positions of the chamber is different, the absorption efficiency of the hydrogen gas is also affected, so that the sensor 1 of the present invention includes one or more conductive bodies, in the embodiment, one arrangement manner of the plurality of conductive bodies is interval arrangement and the distance between the conductive bodies and the port 5 is gradually increased, and by detecting the hydrogen absorption amount at multiple positions, the accuracy of the hydrogen saturation determination can be improved.
As shown in fig. 2, the present invention also provides a safety detection method of an air conditioner using an electrochemical compressor, comprising the steps of:
s101, acquiring a current value of a conductor composed of metal hydride;
s102, matching the current value of the electric conductor in the incidence relation according to the incidence relation between the preset current value and the hydrogen saturation, and determining the hydrogen saturation corresponding to the current value;
s103, controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation.
In one embodiment of the present invention, taking the detection of the electric conductor in the metal hydride in the hydrogen absorption state as an example, the specific process of acquiring the electric current value of the electric conductor composed of the metal hydride includes: acquiring the current value of a conductor of an inductor in the metal hydride heat exchanger in a hydrogen absorption state; controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation, the process comprising: and controlling to switch the voltage direction of the electrochemical compressor when the current value is not greater than a preset first current threshold value. The first current threshold value is the current value when the corresponding conductor reaches the upper limit of the hydrogen absorption amount; because the absorption amount of hydrogen is reduced and the hydrogen pressure in the cavity is increased when the metal hydride reaches the upper limit of the hydrogen absorption amount, in order to ensure that the internal pressure of the metal hydride heat exchanger is in a safe pressure range, the first current threshold value can be slightly larger than the current value when the electric conductor reaches the upper limit of the hydrogen absorption amount, so that the voltage direction of the electrochemical compressor is switched in advance, and the excessive hydrogen filled in the cavity is avoided.
Since the air conditioner includes at least two metal hydride heat exchangers, when one of the metal hydride heat exchangers is in the hydrogen absorption state, the other metal hydride heat exchanger is in the hydrogen discharge state, and taking the metal hydride heat exchanger in the hydrogen discharge state as an example, the train for obtaining the current value of the electric conductor composed of the metal hydride includes: acquiring the current value of a conductor of an inductor in the metal hydride heat exchanger in a hydrogen discharge state; controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation, the process comprising: and when the current value is larger than a preset second current threshold value, controlling to switch the voltage direction of the electrochemical compressor. The second current threshold is slightly lower than the current value corresponding to the situation that the electric conductor does not absorb hydrogen, because when the electric conductor discharges hydrogen along with the metal hydride, the electric conductivity of the electric conductor is gradually improved, and the detected current value is gradually increased, so that when the electric conductor is larger than the second current threshold, the content of hydrogen in the metal hydride is judged to be low, and in order to avoid the excessive hydrogen filled in the other metal hydride heat exchanger, the voltage direction of the electrochemical compressor needs to be switched in advance to enable the hydrogen to be conveyed in the direction.
The present invention also provides a safety inspection apparatus for an air conditioner using an electrochemical compressor, which controls the air conditioner using the safety inspection method disclosed by the above facts, the safety inspection apparatus comprising: an acquisition unit for acquiring a current value of an electric conductor composed of a metal hydride; the determining unit is used for matching the current value of the electric conductor in the incidence relation according to the incidence relation between the preset current value and the hydrogen saturation and determining the hydrogen saturation corresponding to the current value; and the switching unit is used for controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation.
In an embodiment, the obtaining unit is configured to: acquiring the current value of a conductor of an inductor in the metal hydride heat exchanger in a hydrogen absorption state; the switching unit is used for: and controlling to switch the voltage direction of the electrochemical compressor when the current value is not greater than a preset first current threshold value.
In an embodiment, the obtaining unit is configured to: acquiring the current value of a conductor of an inductor in the metal hydride heat exchanger in a hydrogen discharge state; the switching unit is used for: and when the current value is larger than a preset second current threshold value, controlling to switch the voltage direction of the electrochemical compressor.
Other parts and structures of the air conditioner are not related to the innovation point of the scheme, so that the details are not described.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (6)
1. An air conditioner is characterized by comprising a shell, an electrochemical compressor (3), at least two metal hydride heat exchangers (4) and a hydrogen saturation detection device, wherein the electrochemical compressor (3) is arranged in the shell and is connected with the two metal hydride heat exchangers (4) through a hydrogen conveying pipeline, the metal hydride heat exchangers (4) are provided with chambers filled with metal hydrides, and the chambers are provided with ports (5) for hydrogen to enter and exit; the hydrogen saturation detection device includes:
an inductor (1) provided in the chamber, and including a conductor made of a metal hydride and a power supply unit for supplying power to the conductor; the inductor (1) is arranged at one end of the cavity far away from the port (5); the inductor (1) comprises a plurality of electric conductors which are arranged at intervals and the distance between the electric conductors and the port (5) is gradually increased;
and the controller (2) is electrically connected with the inductor (1) and is used for detecting the current change of the electric conductor and determining the saturation of the hydrogen according to the current change.
2. The air conditioner according to claim 1, wherein the controller (2) determines the saturation of hydrogen gas according to the change of the current, including:
and matching the current value of the electric conductor in the incidence relation according to the incidence relation between the preset current value and the hydrogen saturation, and determining the hydrogen saturation corresponding to the current value.
3. Air conditioner according to claim 1 or 2, characterized in that the controller (2) is further adapted to control the switching of the voltage direction of the electrochemical compressor depending on the determined hydrogen saturation.
4. A safety detection method applied to the air conditioner according to any one of claims 1 to 3, comprising:
acquiring a current value of an electric conductor composed of metal hydride;
matching the current value of the conductor in the incidence relation according to the incidence relation between a preset current value and hydrogen saturation, and determining the hydrogen saturation corresponding to the current value;
and controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation.
5. The security detection method of claim 4,
obtaining a current value of an electric conductor composed of a metal hydride, comprising: acquiring the current value of a conductor of the inductor in the metal hydride heat exchanger in a hydrogen absorption state;
controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation, comprising:
and when the current value is not greater than a preset first current threshold value, controlling to switch the voltage direction of the electrochemical compressor.
6. The security detection method of claim 4,
obtaining a current value of an electric conductor composed of a metal hydride, comprising: acquiring the current value of a conductor of the inductor in the metal hydride heat exchanger in a hydrogen discharge state;
controlling the switching of the voltage direction of the electrochemical compressor according to the hydrogen saturation, comprising:
and when the current value is larger than a preset second current threshold value, controlling and switching the voltage direction of the electrochemical compressor.
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| CN110030659B (en) * | 2019-03-26 | 2021-01-29 | 青岛海尔空调器有限总公司 | Electrochemical air conditioner and control method thereof |
| CN110057027B (en) * | 2019-04-15 | 2021-01-29 | 青岛海尔空调器有限总公司 | Method and device for monitoring temperature and humidity adjusting equipment and computer storage medium |
| CN110057056B (en) * | 2019-04-15 | 2021-09-21 | 青岛海尔空调器有限总公司 | Method and device for monitoring operation mode of temperature and humidity adjusting equipment and storage medium |
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| JPS6410070A (en) * | 1987-07-02 | 1989-01-13 | Hokkaido Electric Power | Method of controlling air conditioner by utilizing metallic hydride |
| JP2005164584A (en) * | 2003-11-11 | 2005-06-23 | Akihisa Inoue | Hydrogen gas sensor |
| CN101625335A (en) * | 2009-08-19 | 2010-01-13 | 河北理工大学 | Thick-film type limited current hydrogen sensor and preparation method thereof |
| CN106196368A (en) * | 2016-07-21 | 2016-12-07 | 青岛海尔空调器有限总公司 | The method for controlling rotation of electrochemistry air conditioning system |
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| JPS6410070A (en) * | 1987-07-02 | 1989-01-13 | Hokkaido Electric Power | Method of controlling air conditioner by utilizing metallic hydride |
| JP2005164584A (en) * | 2003-11-11 | 2005-06-23 | Akihisa Inoue | Hydrogen gas sensor |
| CN101625335A (en) * | 2009-08-19 | 2010-01-13 | 河北理工大学 | Thick-film type limited current hydrogen sensor and preparation method thereof |
| CN106196368A (en) * | 2016-07-21 | 2016-12-07 | 青岛海尔空调器有限总公司 | The method for controlling rotation of electrochemistry air conditioning system |
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Effective date of registration: 20210114 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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