CN113357761B - Steering control method and device for electrochemical refrigeration system and intelligent air conditioner - Google Patents
Steering control method and device for electrochemical refrigeration system and intelligent air conditioner Download PDFInfo
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- CN113357761B CN113357761B CN202110552563.1A CN202110552563A CN113357761B CN 113357761 B CN113357761 B CN 113357761B CN 202110552563 A CN202110552563 A CN 202110552563A CN 113357761 B CN113357761 B CN 113357761B
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- 238000000034 method Methods 0.000 title claims abstract description 61
- 238000005057 refrigeration Methods 0.000 title claims abstract description 43
- 229910052987 metal hydride Inorganic materials 0.000 claims abstract description 145
- 150000004681 metal hydrides Chemical class 0.000 claims abstract description 145
- 239000001257 hydrogen Substances 0.000 claims description 63
- 229910052739 hydrogen Inorganic materials 0.000 claims description 63
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 56
- 238000010521 absorption reaction Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 150000002431 hydrogen Chemical class 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The application relates to the technical field of intelligent household appliances and discloses a steering control method for an electrochemical refrigeration system. The method comprises the following steps: obtaining a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value and an indoor environment temperature value; and obtaining a pressure difference value between the first pressure value and the second pressure value, if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is smaller than a set temperature value, controlling the electrochemical compressor to switch over firstly and then stop, and switching over by the electromagnetic three-way valve. By the control mode, the time for determining the turning of the electrochemical compressor is realized, the electrochemical compressor is reversed when the electrochemical compressor cannot react, the electrochemical compressor is protected, and meanwhile, energy is saved. The application also discloses a steering control device and an intelligent air conditioner for the electrochemical refrigeration system.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a steering control method and device for an electrochemical refrigeration system and an air conditioner.
Background
The electrochemical compressor is a hydrogen compressor in which hydrogen is supplied to the anode, is noise-free, expandable, and easy to modularize, and has been tried to be applied to a new type of refrigeration system, for example: in electrochemical refrigeration systems. The electrochemical refrigerating system is an air conditioner which is based on endothermic and exothermic reactions in chemistry, cools indoor environment through the endothermic reactions, and releases heat energy to surrounding media through the exothermic reactions.
As can be seen from the principles of electrochemical refrigeration systems, an electrochemical refrigeration system requires two metal hydride heat exchangers and an electrochemical compressor, wherein the electrochemical compressor is disposed between the first metal hydride heat exchanger and the second metal hydride heat exchanger. When the electrochemical compressor applies a forward voltage, the first metal hydride heat exchanger releases heat and absorbs hydrogen as a condenser, and the second metal hydride heat exchanger absorbs heat and releases hydrogen as an evaporator. When negative voltage is applied to the electrochemical compressor, the first metal hydride heat exchanger absorbs and releases hydrogen to serve as an evaporator, and the second metal hydride heat exchanger releases heat and absorbs hydrogen to serve as a condenser.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the timing of the electrochemical compressor turning, i.e., when the electrochemical compressor applies positive pressure and when the electrochemical compressor applies negative pressure, cannot be accurately determined.
Disclosure of Invention
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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a steering control method and device for an electrochemical refrigeration system and an intelligent air conditioner, which aim to solve the technical problem that the steering time of an electrochemical compressor cannot be determined.
In some embodiments, the method for steering control of an electrochemical refrigeration system comprises: obtaining a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value and an indoor environment temperature value; obtaining a pressure difference value between the first pressure value and the second pressure value, and if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is smaller than the set temperature value, controlling the electrochemical compressor to reverse first and then stop, and controlling the electromagnetic three-way valve to reverse; and continuously acquiring a new indoor environment temperature value, and controlling the electrochemical compressor to start up and operate if the new indoor environment temperature value is greater than a first preset temperature value, wherein the first preset temperature value is greater than the set temperature value.
Optionally, the method further comprises: and if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is larger than or equal to the set temperature value, controlling the electrochemical compressor to operate in a reversing mode, and reversing the electromagnetic three-way valve.
Optionally, the method further comprises: if the pressure difference value is greater than or equal to a first preset pressure value and the indoor environment temperature value is less than the set temperature value, controlling the electrochemical compressor to stop; and controlling the electrochemical compressor to start up and operate until the indoor environment temperature value is greater than a first preset temperature value.
Optionally, the method further comprises: and if the pressure difference value is greater than or equal to a first preset pressure value and the indoor environment temperature value is greater than or equal to the set temperature value, controlling the electrochemical compressor to normally operate.
Optionally, the method further comprises: when only hydrogen releasing reaction occurs and hydrogen absorbing reaction does not occur, carrying out steering control according to the pressure difference value and the first preset pressure value; obtaining the content of the metal hydride in the metal hydride heat exchanger which starts the hydrogen absorption reaction under the condition that the pressure difference value is in positive correlation with the content of the metal hydride in the metal hydride heat exchanger which starts the hydrogen absorption reaction; if the content of the metal hydride is smaller than a first preset metal hydride content value and the indoor environment temperature value is smaller than the set temperature value, controlling the electrochemical compressor to reverse firstly and then stop, and reversing the electromagnetic three-way valve; and controlling the electrochemical compressor to start up and operate until the new indoor environment temperature value is greater than a first preset temperature value, wherein the first preset temperature value is greater than the set temperature value.
Optionally, the method further comprises: and if the content of the metal hydride in the metal hydride heat exchanger for hydrogen absorption reaction is less than the first preset metal hydride content and the indoor environment temperature value is greater than or equal to the set temperature value, controlling the electrochemical compressor to perform reversing operation and controlling the three-way valve to perform reversing.
Optionally, the first preset pressure value is determined according to the content of the metal hydride heat exchanger and an indoor environment temperature value.
In some embodiments, the steering control for an electrochemical refrigeration system comprises: a first obtaining module configured to obtain a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value, and an indoor ambient temperature value; the second obtaining module is configured to obtain a pressure difference value between the first pressure value and the second pressure value, and if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is smaller than the set temperature value, the electrochemical compressor is controlled to be firstly reversed and then shut down, and an electromagnetic three-way valve is controlled to be reversed; and the control module is configured to continuously acquire a new indoor environment temperature value, and if the new indoor environment temperature value is greater than a first preset temperature value, the control module controls the electrochemical compressor to start up and operate, wherein the first preset temperature value is greater than the set temperature value.
In some embodiments, the steering control device for an electrochemical refrigeration system includes a processor and a memory storing program instructions, and the processor is configured to execute the steering control method for the electrochemical refrigeration system according to the foregoing embodiments when executing the program instructions.
In some embodiments, the intelligent air conditioner comprises the steering control device for the electrochemical refrigeration system, which is provided in the previous embodiments.
The steering control method and device for the electrochemical refrigeration system and the intelligent air conditioner provided by the embodiment of the disclosure can achieve the following technical effects:
a control method for an electrochemical refrigeration system, the method comprising: and obtaining a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value and an indoor environment temperature value, and obtaining a pressure difference value through the first pressure value and the second pressure value. If the pressure difference value is smaller than a first preset pressure value, namely when the first metal hydride absorbs heat to perform a hydrogen discharge reaction, hydrogen is diffused into the second metal hydride heat exchanger through the electrochemical compressor, the second metal hydride heat exchanger starts to accumulate hydrogen, in the process, the pressure difference value between the first pressure value and the second pressure value is gradually increased until the pressure difference value is increased to the maximum value, chemical reaction starts to occur, the pressure difference value starts to be reduced to the first preset pressure value, namely, at the moment, the metal hydride in the first metal hydride heat exchanger cannot continue to react, the electrochemical compressor is controlled to stop to perform reversing, and the electromagnetic three-way valve performs reversing. And the indoor environment temperature value is less than the set temperature value, namely the indoor environment temperature value exceeds the temperature value set by the user, at the moment, the electrochemical compressor is not started, so that the indoor temperature rises, until the indoor environment temperature value is greater than a first preset temperature value, the electrochemical compressor is started to operate, wherein the first preset temperature value is greater than the set temperature value. By the control mode, the time for determining the turning of the electrochemical compressor is realized, the electrochemical compressor is reversed when the electrochemical compressor cannot react, the electrochemical compressor is protected, and meanwhile, energy is saved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of a configuration for an electrochemical refrigeration system provided by an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a control method for an electrochemical refrigeration system according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another control method for an electrochemical refrigeration system provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another control method for an electrochemical refrigeration system provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a control device for an electrochemical refrigeration system according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of another control device for an electrochemical refrigeration system according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate for the embodiments of the disclosure described herein. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.
Referring to fig. 1, the electrochemical refrigeration system includes a first metal hydride heat exchanger 1, a second metal hydride heat exchanger 2, an electrochemical compressor 3, a hydrogen pipeline 5, a heat pipe, an electromagnetic three-way valve 7, and a final heat exchanger 4. The first metal hydride heat exchanger 1, the electrochemical compressor 3 and the second metal hydride heat exchanger 2 are connected in sequence through a hydrogen pipeline 5 to form a hydrogen circulation loop. The heat pipe is provided with a first section 61, a second section 62 and a third section 63, the first section 61 and the third section 63 of the heat pipe are used for communicating the first metal hydride heat exchanger 1 and the terminal heat exchanger 4, the second section 62 and the third section 63 of the heat pipe are used for communicating the second metal hydride heat exchanger 2 and the terminal heat exchanger 4, the electromagnetic three-way valve 7 comprises a first interface, a second interface, a third interface, a first valve position and a second valve position, the first valve position is used for communicating the first interface with the third interface, the second valve position is used for communicating the second interface with the third interface, the first interface is connected with the first section 61 of the heat pipe, the second interface is connected with the second section 62 of the heat pipe, and the third interface is connected with the third section 63 of the heat pipe.
When a forward voltage is applied to the electrochemical compressor 3, the first metal hydride heat exchanger 1 absorbs heat to generate a hydrogen discharge reaction, hydrogen is diffused into the second metal hydride heat exchanger 2 through a hydrogen pipeline, the hydrogen concentration at the end of the second metal hydride heat exchanger 2 is gradually increased, the internal pressure of the metal hydride heat exchanger is increased, and therefore the second metal hydride heat exchanger 2 generates a hydrogen absorption reaction to discharge heat.
At this time, the electromagnetic three-way valve 7 opens the first valve, closes the second valve, that is, the first metal hydride heat exchanger 1 and the terminal heat exchanger 4 are communicated, the terminal heat exchanger 4 end of the third section 63 of the heat pipe is an evaporation end, the first metal hydride heat exchanger 1 end of the first section 61 of the heat pipe is a cooling end, after the evaporation end receives heat from the indoor environment, the working liquid evaporates and absorbs the heat, and then the vapor diffuses to the cooling section of the heat pipe, the first metal hydride heat exchanger 1 at the cooling end of the heat pipe absorbs the heat of the vapor in the heat pipe, so that the vapor in the heat pipe liquefies and becomes the working liquid, and the working liquid flows back to the evaporation end under the action of capillary force of the heat pipe, thereby completing one cycle.
When the electrochemical compressor 3 applies negative pressure, the second metal hydride heat exchanger 2 absorbs heat to generate a hydrogen discharge reaction, hydrogen diffuses into the first metal hydride heat exchanger 1 through a hydrogen pipeline, the hydrogen concentration at the end of the first metal hydride heat exchanger 1 is gradually increased, the internal pressure of the metal hydride heat exchanger is increased, and therefore the first metal hydride heat exchanger 1 generates a hydrogen absorption reaction and releases heat.
At this time, the electromagnetic three-way valve 7 should open the second valve and close the first valve, that is, the second metal hydride heat exchanger 2 and the terminal heat exchanger 4 are communicated, the terminal heat exchanger end of the third section 63 of the heat pipe is an evaporation end, and the second metal hydride heat exchanger 2 end of the second section 62 of the heat pipe is a cooling end, and the working principle thereof is the same as that of the heat pipe, and will not be described herein again.
Referring to fig. 2, in order to accurately determine the turning timing of the electrochemical compressor, an embodiment of the present disclosure provides a control method for an electrochemical refrigeration system, where the control method includes:
s101, obtaining a first pressure value in a first metal hydride heat exchanger, a second pressure value in a second metal hydride heat exchanger, a set temperature value and an indoor environment temperature value;
s102, obtaining a pressure difference value between a first pressure value and a second pressure value, if the pressure difference value is smaller than a first preset pressure value and an indoor environment temperature value is smaller than a set temperature value, controlling the electrochemical compressor to reverse firstly and then stop, and controlling the electromagnetic three-way valve to reverse;
and S103, continuously acquiring a new indoor environment temperature value, and if the new indoor environment temperature value is greater than a first preset temperature value, controlling the electrochemical compressor to start and operate, wherein the first preset temperature value is greater than a set temperature value.
The electrochemical compressor applies positive pressure, and the electromagnetic three-way valve opens the first valve and closes the second valve. The first metal hydride heat exchanger can be provided with a first pressure detection device for obtaining a pressure value in the first metal hydride heat exchanger and recording the pressure value as a first pressure value, the second metal hydride heat exchanger can be provided with a second pressure detection device for obtaining a pressure value in the second metal hydride heat exchanger and recording the pressure value as a second pressure value, and a temperature value set by a user and an indoor environment temperature value are obtained, wherein the indoor environment temperature value is obtained by arranging the temperature detection device indoors.
And obtaining a pressure difference value between the first pressure value and the second pressure value, wherein the pressure difference value can be used for judging whether the reactants in the first metal hydride heat exchanger and the second metal hydride heat exchanger completely react at the moment.
As an example, the first metal hydride heat exchanger absorbs heat to generate hydrogen discharge reaction, the hydrogen gas is transported to the second metal hydride heat exchanger through the electrochemical compressor, the pressure of the second metal hydride heat exchanger is gradually increased, the first pressure value is kept unchanged, the second pressure value is gradually increased, and the pressure difference between the first pressure value and the second pressure value is gradually increased. When the pressure difference value is larger than a certain value, the metal hydride in the second metal hydride heat exchanger starts to perform hydrogen absorption reaction, the hydrogen in the second metal hydride heat exchanger starts to decrease, namely the second pressure value starts to decrease, and the first pressure value is still maintained, so that the pressure difference value starts to decrease. When the pressure difference value is reduced to be smaller than a preset value, namely the reactant of the first metal hydride heat exchanger is completely reacted and can not be reacted any more, and the indoor environment temperature value is smaller than a set temperature value, namely the indoor environment temperature is lower than the temperature set by a user, the electrochemical compressor is controlled to be reversed and then stopped, wherein the reversing of the electrochemical compressor is controlled to ensure that the electrochemical compressor can continue to react and absorb heat, the electrochemical compressor is controlled to be stopped, the indoor environment temperature value is increased again, the situation that the indoor environment temperature value is too much and is lower than the temperature set by the user is avoided, and when the electrochemical compressor is reversed, the electromagnetic three-way valve is controlled to be reversed to keep the air conditioner in a continuous refrigeration state, namely the second metal hydride heat exchanger and the terminal heat exchanger are communicated.
In the process, the electrochemical compressor is not started, the indoor environment temperature rises again, and the electrochemical compressor is started to operate until the indoor environment temperature rises again to the first preset temperature value. The first preset temperature value may be equal to the set temperature value plus a value, for example: the set temperature value is increased by 3. The first preset temperature value is set, when the temperature sensor detects that the indoor environment temperature value is equal to the set value, the change range of the temperature value from being smaller than the set value to being equal to the set value is very small, and the controller cannot recognize the change of the temperature value, so that a numerical value is required to be added on the basis of the set value, and the controller can easily recognize the temperature value. Meanwhile, if the first preset value is larger than the set value, the indoor environment temperature value can have a temperature return process, compared with the situation that the temperature return process is not carried out, the electrochemical compressor is started again, the electrochemical compressor can work for a period of time and then stops, and the telephone compressor is protected.
Optionally, the control method for the electrochemical refrigeration system further comprises:
s201, if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is larger than or equal to a set temperature value, controlling the electrochemical compressor to operate in a reversing mode, and reversing the electromagnetic three-way valve.
And if the pressure difference value between the first pressure value and the second pressure value is smaller than the first preset pressure value, the metal hydride in the first metal hydride heat exchanger and/or the second metal hydride heat exchanger completely reacts at the moment, and the reaction can not be continued. And at the moment, the temperature value of the indoor environment is greater than or equal to the set temperature value, namely, the electrochemical air conditioner can continue to refrigerate at the moment. The electrochemical compressor is controlled to operate in a reversing mode, namely the first metal hydride heat exchanger changes from absorbing heat and releasing hydrogen into releasing heat and absorbing hydrogen, the second metal hydride heat exchanger changes from absorbing heat and releasing hydrogen into absorbing heat and releasing hydrogen, and in order to continuously refrigerate, the electromagnetic three-way valve is also reversed to communicate the second metal hydride heat exchanger with the terminal heat exchanger.
Referring to fig. 3, the control method for the electrochemical refrigeration system further includes:
s301, if the pressure difference value is greater than or equal to a first preset pressure value and the indoor environment temperature value is less than a set temperature value, controlling the electrochemical compressor to stop;
s302, controlling the electrochemical compressor to start up and operate until the indoor environment temperature value is greater than a first preset temperature value.
If the pressure difference between the first pressure value and the second pressure value is larger than or equal to the first preset pressure value, the metal hydride in the first metal hydride heat exchanger and the second metal hydride heat exchanger can continue to react. And if the indoor environment temperature value is less than the set temperature value, controlling the electrochemical compressor to stop, so that the indoor environment temperature can have a temperature return process until the indoor environment temperature value is greater than a first preset temperature value, namely the indoor environment temperature value returns to a certain temperature value, and controlling the electrochemical compressor to start to operate when the electrochemical air conditioner continues to refrigerate.
Optionally, the control method for the electrochemical refrigeration system further comprises:
s401, if the pressure difference value is larger than or equal to a first preset pressure value, and the indoor environment temperature value is larger than or equal to a set temperature value, controlling the electrochemical compressor to normally operate.
The metal hydride in the first metal hydride heat exchanger and the second metal hydride heat exchanger can also continue to react if the pressure difference between the first pressure and the second pressure is greater than or equal to the first predetermined pressure value. And the indoor environment temperature value is greater than or equal to the set temperature value, namely the indoor environment temperature value is not reduced to the set temperature value, the electrochemical compressor is controlled to normally operate.
Referring to fig. 4, the control method for the electrochemical refrigeration system includes:
s501, performing steering control according to the pressure difference value and a first preset pressure value under the condition that only hydrogen releasing reaction occurs and hydrogen absorbing reaction does not occur;
s502, obtaining the content of the metal hydride in the metal hydride heat exchanger with the hydrogen absorption reaction under the condition that the pressure difference value is in positive correlation with the content of the metal hydride in the metal hydride heat exchanger with the hydrogen absorption reaction;
s503, if the content of the metal hydride is less than a first preset metal hydride content value, and the indoor environment temperature value is less than the set temperature value, controlling the electrochemical compressor to switch over firstly and then stop, and switching over by the electromagnetic three-way valve;
and S504, controlling the electrochemical compressor to start up and operate until the new indoor environment temperature value is greater than a first preset temperature value, wherein the first preset temperature value is greater than the set temperature value.
As an example, the second metal hydride heat exchanger performs an exothermic hydrogen absorption reaction, and after the second metal hydride heat exchanger starts the hydrogen absorption reaction, the content of the metal hydride in the second metal hydride heat exchanger gradually decreases, and from the beginning of the hydrogen absorption reaction in the second metal hydride heat exchanger, the pressure difference starts to decrease, that is, the hydrogen absorption reaction starts to occur, and the pressure difference is in positive correlation with the content of the metal hydride in the metal hydride heat exchanger performing the hydrogen absorption reaction.
Alternatively, after the hydrogen absorption reaction starts to occur, the turning timing of the electrochemical compressor can be judged not only by the pressure difference value, but also by the content of the metal hydride in the metal hydride heat exchanger where the hydrogen absorption reaction occurs.
According to the electrochemical refrigeration system provided by the embodiment of the disclosure, the metal hydride detection elements can be respectively installed in the first metal hydride heat exchanger and the second metal hydride heat exchanger, the content of the metal hydride in the metal hydride heat exchanger which generates the hydrogen absorption reaction can be detected, and the content in both the two metal hydride heat exchangers can also be detected.
If the content of the metal hydride in the metal hydride heat exchanger in which the hydrogen absorption reaction occurs is less than the first preset metal hydride content value, the metal hydride in the metal hydride heat exchanger in which the hydrogen absorption reaction occurs can not continue to react. And the indoor environment temperature value is smaller than the set temperature value, namely the indoor environment temperature value is lower than the temperature value set by the user. The electrochemical compressor is controlled to change the direction of the hydrogen gas flow and then stop, the change is to change the reaction of the first metal hydride heat exchanger and the second metal hydride heat exchanger for exchange, and the stop is to return the indoor environment temperature.
And controlling the starting operation of the electrochemical compressor until the indoor environment temperature value is greater than the first preset temperature value, namely the environment temperature value has a rising trend along with the temperature return.
By the control mode, the time for determining the turning of the electrochemical compressor is realized, the electrochemical compressor is reversed when the electrochemical compressor cannot react, the electrochemical compressor is protected, and meanwhile, energy is saved.
Optionally, the control method for the electrochemical refrigeration system further comprises:
s601, if the content of the metal hydride in the metal hydride heat exchanger in which the hydrogen absorption reaction occurs is less than the first preset metal hydride content and the indoor environment temperature value is greater than or equal to the set temperature value, controlling the electrochemical compressor to perform reversing operation and controlling the three-way valve to reverse.
If the content of the metal hydride in the metal hydride heat exchanger in which the hydrogen absorption reaction occurs is less than the first preset metal hydride content, the metal hydride in the metal hydride heat exchanger in which the hydrogen absorption reaction occurs can not continue to react. And the indoor environment temperature value is greater than or equal to the set temperature value, namely the indoor environment temperature value does not reach the temperature value set by the user. The electrochemical compressor is controlled to run in a reversing way, and the three-way valve is controlled to reverse.
Optionally, the first preset pressure value is determined according to the content of the metal hydride heat exchanger and the indoor environment temperature value.
The content of the metal hydride heat exchanger is different, and the generated hydrogen is different, so that the first pressure value and the second pressure value are different, and the pressure difference value is different. If the indoor environment temperature values are different, the metal hydride reaction efficiency will be different, so the first preset pressure value can be determined according to the content of the metal hydride heat exchanger and the indoor environment temperature value.
As shown in fig. 5, the control device for the electrochemical refrigeration system includes a first obtaining module 51, a second obtaining module 52 and a control module 53. The first obtaining module 51 is configured to obtain a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value, and an indoor ambient temperature value; the second obtaining module 52 is configured to obtain a pressure difference between the first pressure value and the second pressure value, and if the pressure difference is smaller than a first preset pressure value and the indoor environment temperature value is smaller than a set temperature value, control the electrochemical compressor to switch over first and then stop, and switch over the electromagnetic three-way valve; the control module 53 is configured to control the electrochemical compressor to start up until the new indoor ambient temperature value is greater than a first preset temperature value, wherein the first preset temperature value is greater than a set temperature value.
As shown in fig. 6, the present disclosure provides a control device for an electrochemical refrigeration system, which includes a processor (processor) 600 and a memory (memory) 601. Optionally, the apparatus may also include a Communication Interface 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 may communicate with each other via a bus 603. The communication interface 602 may be used for information transfer. The processor 600 may invoke logic instructions in the memory 601 to perform the control method for the electrochemical refrigeration system of the above-described embodiments.
In addition, the logic instructions in the memory 601 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 601 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 600 executes the functional application and data processing by executing the program instructions/modules stored in the memory 601, so as to implement the control method for the electrochemical refrigeration system in the above embodiment.
The memory 601 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 601 may include a high speed random access memory, and may also include a non-volatile memory.
The embodiment of the disclosure provides an intelligent air conditioner, which comprises the control device for the electrochemical refrigeration system.
The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for an electrochemical refrigeration system.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method for an electrochemical refrigeration system.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and the drawings sufficiently illustrate embodiments of the disclosure 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. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosure, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. 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). 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. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (9)
1. A steering control method for an electrochemical refrigeration system, the method comprising:
obtaining a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value and an indoor environment temperature value;
obtaining a pressure difference value between the first pressure value and the second pressure value;
when the first metal hydride heat exchanger only generates hydrogen releasing reaction and does not generate hydrogen absorbing reaction, if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is smaller than the set temperature value, controlling the electrochemical compressor to reverse first and then stop, and controlling the electromagnetic three-way valve to reverse;
when the first metal hydride heat exchanger starts to generate hydrogen absorption reaction, obtaining the content of the metal hydride in the metal hydride heat exchanger which starts to generate hydrogen absorption reaction under the condition that the pressure difference value is in positive correlation with the content of the metal hydride in the metal hydride heat exchanger which starts to generate hydrogen absorption reaction; if the content of the metal hydride is less than a first preset metal hydride content value and the indoor environment temperature value is less than the set temperature value, controlling the electrochemical compressor to switch over firstly and then stop, and switching over the electromagnetic three-way valve;
and continuously acquiring a new indoor environment temperature value, and controlling the electrochemical compressor to start up and operate if the new indoor environment temperature value is greater than a first preset temperature value, wherein the first preset temperature value is greater than the set temperature value.
2. The steering control method according to claim 1, characterized in that the method further comprises:
and if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is larger than or equal to the set temperature value, controlling the electrochemical compressor to operate in a reversing mode, and reversing the electromagnetic three-way valve.
3. The steering control method according to claim 1, characterized in that the method further comprises:
if the pressure difference value is greater than or equal to a first preset pressure value and the indoor environment temperature value is less than the set temperature value, controlling the electrochemical compressor to stop;
and controlling the electrochemical compressor to start up and operate until the indoor environment temperature value is greater than a first preset temperature value.
4. The steering control method according to claim 1, characterized in that the method further comprises:
and if the pressure difference value is greater than or equal to a first preset pressure value and the indoor environment temperature value is greater than or equal to the set temperature value, controlling the electrochemical compressor to normally operate.
5. The steering control method according to claim 1, characterized in that the method further comprises:
and if the content of the metal hydride in the metal hydride heat exchanger for hydrogen absorption reaction is less than the first preset metal hydride content and the indoor environment temperature value is greater than or equal to the set temperature value, controlling the electrochemical compressor to perform reversing operation and controlling the three-way valve to perform reversing.
6. The steering control method according to any one of claims 1 to 5, wherein the first preset pressure value is determined according to the content of the metal hydride heat exchanger and an indoor ambient temperature value.
7. A steering control for an electrochemical refrigeration system, comprising:
a first obtaining module configured to obtain a first pressure value in the first metal hydride heat exchanger, a second pressure value in the second metal hydride heat exchanger, a set temperature value, and an indoor ambient temperature value;
a second obtaining module configured to obtain a pressure difference value of the first pressure value and the second pressure value; when the first metal hydride heat exchanger only generates hydrogen releasing reaction and does not generate hydrogen absorbing reaction, if the pressure difference value is smaller than a first preset pressure value and the indoor environment temperature value is smaller than the set temperature value, controlling the electrochemical compressor to reverse first and then stop, and controlling the electromagnetic three-way valve to reverse; when the first metal hydride heat exchanger starts to generate hydrogen absorption reaction, obtaining the content of the metal hydride in the metal hydride heat exchanger which starts to generate hydrogen absorption reaction under the condition that the pressure difference value is in positive correlation with the content of the metal hydride in the metal hydride heat exchanger which starts to generate hydrogen absorption reaction; if the content of the metal hydride is smaller than a first preset metal hydride content value and the indoor environment temperature value is smaller than the set temperature value, controlling the electrochemical compressor to reverse firstly and then stop, and reversing the electromagnetic three-way valve;
and the control module is configured to continuously acquire a new indoor environment temperature value, and if the new indoor environment temperature value is greater than a first preset temperature value, the control module controls the electrochemical compressor to start and operate, wherein the first preset temperature value is greater than the set temperature value.
8. A steering control apparatus for an electrochemical refrigeration system comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to perform the steering control method for an electrochemical refrigeration system of any of claims 1 to 6 when executing the program instructions.
9. An intelligent air conditioner, characterized by comprising the steering control device for the electrochemical refrigerating system according to claim 7 or 8.
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| CN202110552563.1A CN113357761B (en) | 2021-05-20 | 2021-05-20 | Steering control method and device for electrochemical refrigeration system and intelligent air conditioner |
| PCT/CN2022/073389 WO2022242220A1 (en) | 2021-05-20 | 2022-01-24 | Diversion control method and apparatus for electrochemical refrigeration system, and intelligent air conditioner |
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| CN202110552563.1A CN113357761B (en) | 2021-05-20 | 2021-05-20 | Steering control method and device for electrochemical refrigeration system and intelligent air conditioner |
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| CN107796089A (en) * | 2016-08-30 | 2018-03-13 | 青岛海尔空调器有限总公司 | The metal hydride heat exchanger reverse control method of Electrochemical Refrigeration system |
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| JPH0810093B2 (en) * | 1987-07-02 | 1996-01-31 | 北海道電力株式会社 | Control method for air conditioning system using metal hydride |
| JPH0810094B2 (en) * | 1987-08-28 | 1996-01-31 | 北海道電力株式会社 | Method for controlling heat pump using metal hydride |
| US6553771B2 (en) * | 2000-12-01 | 2003-04-29 | Borst Inc. | Electrochemical heat pump system |
| CN100404976C (en) * | 2006-07-13 | 2008-07-23 | 上海交通大学 | Single alloy compressing-diffusing metal hydride heat pump/refrigerating method and system |
| CN106288071A (en) * | 2016-07-21 | 2017-01-04 | 青岛海尔空调器有限总公司 | Electrochemistry air conditioning system |
| CN107975965A (en) * | 2016-10-21 | 2018-05-01 | 青岛海尔智能技术研发有限公司 | Metal hydride refrigeration system and its control method |
| US10211469B1 (en) * | 2018-02-19 | 2019-02-19 | Emerson Climate Technologies, Inc. | Heat rejection system for electrochemical climate control system |
| CN113357761B (en) * | 2021-05-20 | 2022-12-23 | 青岛海尔空调器有限总公司 | Steering control method and device for electrochemical refrigeration system and intelligent air conditioner |
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| CN107796089A (en) * | 2016-08-30 | 2018-03-13 | 青岛海尔空调器有限总公司 | The metal hydride heat exchanger reverse control method of Electrochemical Refrigeration system |
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