CN111306855B - Refrigerant heating control method and device for improving stability and air conditioning equipment - Google Patents
Refrigerant heating control method and device for improving stability and air conditioning equipment Download PDFInfo
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- CN111306855B CN111306855B CN202010120898.1A CN202010120898A CN111306855B CN 111306855 B CN111306855 B CN 111306855B CN 202010120898 A CN202010120898 A CN 202010120898A CN 111306855 B CN111306855 B CN 111306855B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or 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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
Abstract
The invention discloses a refrigerant heating control method and device for improving stability and air conditioning equipment. Wherein, the method comprises the following steps: controlling the opening of a liquid inlet valve of a heating device to enable the refrigerant in the gas-liquid separator to flow into the heating device; controlling the liquid inlet valve to be closed after the liquid inlet valve is opened for a first preset time period, wherein the first preset time period is determined according to the flow rate of a refrigerant in a pipeline between the gas-liquid separator and the heating device; and after the liquid inlet valve is closed for a second preset time period, controlling the liquid inlet valve to be opened, wherein the second preset time period is determined according to the power of the heating device. By the invention, liquid impact of the compressor and dry burning of the heating device can be avoided, and the stability of the air conditioning equipment is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant heating control method and device for improving stability and air conditioning equipment.
Background
The gas-liquid separator is an important component of an air conditioning system and has the functions of storing a refrigerant, preventing liquid impact of a compressor and the like. When the refrigerant flows in the system, the gas-liquid separator separates gas refrigerant from liquid refrigerant, and the liquid refrigerant is stored in the gas-liquid separator. However, the storage of a large amount of liquid cold in the gas-liquid separator leads to low utilization rate of the refrigerant of the system, and has certain influence on the capacity and reliability of the system. The existing gas-liquid separator has the greatest effect of separating gaseous and liquid refrigerants to prevent liquid impact of the compressor. However, in a continuous heating system, the existing gas-liquid separator cannot meet the design requirement. Can participate in the system circulation after liquid refrigerant heating evaporation is gaseous for in the vapour and liquid separator through heating device, but because heating device's volume is limited, if the liquid refrigerant among the vapour and liquid separator of constant control flows into heating device, can lead to the liquid refrigerant to spill over heating device to get into the compressor, but if the liquid refrigerant among the vapour and liquid separator stops flowing into heating device's time overlength, can lead to heating device dry combustion method again, reduce equipment stability.
Aiming at the problem that the stability of equipment is reduced because the conduction time between a gas-liquid separator and a heating device can not be controlled in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a refrigerant heating control method and device for improving stability and air conditioning equipment, and aims to solve the problem that in the prior art, the stability of the equipment is reduced because the conduction time between a gas-liquid separator and a heating device cannot be controlled.
In order to solve the technical problem, the invention provides a refrigerant heating control method for improving stability, wherein the method comprises the following steps:
controlling the opening of a liquid inlet valve of a heating device to enable the refrigerant in the gas-liquid separator to flow into the heating device;
controlling the liquid inlet valve to be closed after the liquid inlet valve is opened for a first preset time period, wherein the first preset time period is determined according to the flow rate of a refrigerant in a pipeline between the gas-liquid separator and the heating device;
and after the liquid inlet valve is closed for a second preset time period, controlling the liquid inlet valve to be opened, wherein the second preset time period is determined according to the power of the heating device.
Further, after the inlet valve of the heating device is controlled to be opened, the method further comprises the following steps:
monitoring the flow rate of the refrigerant in the pipeline;
and determining the first preset time according to the flow rate of the refrigerant, the internal capacity of the heating device and the nominal diameter of the valve.
Further, the first preset time is determined according to the flow rate of the refrigerant in the pipeline, the internal capacity of the heating device and the nominal diameter of the valve, and the first preset time is realized through the following formula:
and V is the internal capacity of the heating device, D is the nominal diameter of the valve, and upsilon is the flow velocity of the refrigerant in the pipeline.
Further, after the liquid inlet valve is controlled to be closed after the liquid inlet valve is opened for a first preset time, the method further comprises the following steps:
and acquiring the power of the heating device, and determining a second preset time corresponding to the power, wherein the second preset time has a preset corresponding relation with the power of the heating device.
Further, the preset corresponding relationship is as follows:
T＝k*m*c/p，
wherein m is the mass of the refrigerant to be heated, c is the latent heat of the refrigerant, p is the power of electric heating, and k is the energy efficiency coefficient.
Further, after the liquid inlet valve is closed for a second preset time, the liquid inlet valve is controlled to be opened, and meanwhile, the heating device is controlled to be closed.
The invention also provides a refrigerant heating control device for improving stability, which comprises:
the first control module is used for controlling the opening of a liquid inlet valve of the heating device so as to enable the refrigerant in the gas-liquid separator to flow into the heating device;
the second control module is used for controlling the liquid inlet valve to be closed after the first preset time period is started, wherein the first preset time period is determined according to the flow rate of a refrigerant in a pipeline between the gas-liquid separator and the heating device;
and the third control module is used for controlling the liquid inlet valve to be opened after the liquid inlet valve is closed for a second preset time period, wherein the second preset time period is determined according to the power of the heating device.
Further, the apparatus further comprises:
the flow rate monitoring module is used for monitoring the flow rate of the refrigerant in the pipeline;
and the first determining module is used for determining the first preset time according to the flow rate of the refrigerant, the internal capacity of the heating device and the nominal diameter of the valve.
Further, the apparatus further comprises:
and the second determining module is used for acquiring the power of the heating device and determining a second preset time corresponding to the power.
Further, the apparatus further comprises:
and the fourth control module is used for controlling the liquid inlet valve to be opened and controlling the heating device to be closed at the same time after the liquid inlet valve is closed for a second preset time.
The invention also provides air conditioning equipment which comprises the refrigerant heating control device.
The invention also provides a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the above-mentioned method.
By applying the technical scheme of the invention, the liquid inlet valve of the heating device is controlled to be closed after being opened for the first preset time, and is controlled to be opened after being closed for the second preset time, so that the valve can be closed in time when the refrigerant of the heating device reaches the upper limit of the capacity, the liquid refrigerant is prevented from overflowing the heating device and entering the compressor to cause liquid impact, in addition, the closing time of the liquid inlet valve is determined according to the power of the heating device, the dry burning of the heating device is avoided, and the stability of the air conditioning equipment can be improved through the control scheme.
Drawings
Fig. 1 is a structural diagram of a refrigerant heating apparatus adopting the control method of the present invention;
fig. 2 is a flowchart of a refrigerant heating control method according to an embodiment of the invention;
fig. 3 is a block diagram of a refrigerant heating control device according to an embodiment of the present invention;
fig. 4 is a block diagram of a refrigerant heating control device according to another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe the preset durations in the embodiments of the present invention, the preset durations should not be limited to these terms. These terms are used only to distinguish … …. For example, the first preset duration may also be referred to as a second preset duration, and similarly, the second preset duration may also be referred to as the first preset duration without departing from the scope of the embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
Fig. 1 is a structural diagram of a refrigerant heating apparatus using a control method of the present invention, and as shown in fig. 1, the apparatus includes:
gas-liquid separator 11 and heating device 12, heating device is including being used for splendid attire liquid refrigerant's heating tank 121 and heating element 122, and gas-liquid separator 11 and heating tank 121 pass through the pipeline intercommunication, are provided with feed liquor valve 13 on the pipeline, and the liquid refrigerant that gas-liquid separator 11 collected flows into heating tank 121, utilizes heating element 122 to heat the liquid refrigerant in the heating tank 121, makes its evaporation be the gaseously, discharges through heating device 12's gas vent, gets back to the compressor.
Based on the above-mentioned devices, this embodiment provides a refrigerant heating control method for improving stability, fig. 2 is a flowchart of the refrigerant heating control method according to the embodiment of the present invention, and as shown in fig. 2, the method includes:
s101, controlling an inlet valve of a heating device to open so that a refrigerant in a gas-liquid separator flows into the heating device;
in specific implementation, in an initial state, no liquid refrigerant exists in the heating device, if the heating device is started at the moment, the heating device is in a dry-burning state, if the heating device is continuously dried, the heating device is damaged, the stability of equipment is reduced, if the heating device is started, the liquid inlet valve is controlled to be opened, under the condition that the heating power of the heating device is high, the evaporation rate of the liquid refrigerant is high, if the liquid refrigerant in the heating device is not supplemented in time, dry burning is possibly caused, and in order to solve the problem of dry burning, it is required to ensure that a sufficient amount of refrigerant exists in the heating device before the heating device is started, therefore, before the heating device is started, the liquid inlet valve of the heating device is controlled to be opened, and the liquid refrigerant collected by the gas-liquid separator enters the heating device.
S102, controlling the liquid inlet valve to be closed after the liquid inlet valve is opened for a first preset time period, wherein the first preset time period is determined according to the flow speed of a refrigerant in a pipeline between the gas-liquid separator and the heating device;
when a liquid inlet valve of the heating device is opened, liquid refrigerant in the gas-liquid separator starts to flow into the heating device, if the liquid refrigerant in the heating device is accumulated more and finally exceeds the horizontal line where an exhaust port of the heating device is located, the liquid refrigerant flows out of the exhaust port and directly enters the compressor to cause liquid impact of the compressor, in order to avoid the situation, the liquid level of the liquid refrigerant does not exceed the exhaust port of the heating device, the liquid refrigerant is required to be controlled to be opened for the longest time and not to exceed the time when the liquid level of the liquid refrigerant reaches the horizontal line where the exhaust port of the heating device is located, therefore, the opening time of the liquid valve can be determined according to the capacity below the exhaust port of the heating device, the capacity below the exhaust port of the heating device represents the volume of the liquid refrigerant flowing into the heating device in the opening time of the liquid refrigerant, then, the time for opening the liquid valve is calculated, only the volume of the liquid refrigerant flowing through the liquid inlet valve in unit time needs to be calculated, the flow rate of the refrigerant represents the length of the refrigerant flowing in unit time, the nominal diameter of the liquid inlet valve is equivalent to the diameter of a liquid column of the refrigerant, the cross section of a through hole of the liquid inlet valve is circular and the diameter is known, the area of the liquid column of the refrigerant can be calculated according to a circular area formula, and the product of the length of the refrigerant flowing in unit time and the area of the liquid column of the refrigerant is calculated, namely the volume of the liquid refrigerant flowing through the liquid inlet valve in unit time, so that the following can be obtained:
S103, after the liquid inlet valve is closed for a second preset time period, controlling the liquid inlet valve to be opened, wherein the second preset time period is determined according to the power of the heating device.
After the liquid inlet valve is closed, the heating device is controlled to be opened to heat the liquid refrigerant, because the evaporation latent heat of the same refrigerant changed from the liquid state to the gas state is fixed, namely the energy required by the refrigerant with the quality changed from the liquid state to the gas state is constant, according to the content, the volume quantity of the internal refrigerant of the heating device is known, the density of the same refrigerant is a fixed value, the quality of the internal refrigerant of the heating device can be calculated, the evaporation latent heat can be determined according to the type of the refrigerant, the heat required to be absorbed by the whole evaporation of the internal liquid refrigerant of the heating device can be calculated by combining the quality of the refrigerant, according to the principle of energy conservation, under the ideal state, the heat energy required to be transferred to the liquid refrigerant by the heating device and the heat absorbed by the refrigerant can be determined, therefore, the heat energy required to be transferred to the liquid refrigerant by the heating device can be, taking an electric heating device as an example, under the condition that the energy conversion rate of the heating device is known, the electric energy required by heating can be calculated according to the energy conversion rate, and then the time required by the evaporation of all the liquid refrigerants in the heating device can be calculated according to the power of the electric heating device, namely the second preset time length is set, because the energy to be converted by the heating device is certain, according to the relation between the energy, the power and the time, the electric heating device can deduce: t ═ k × m × c/p, where m is the mass of the refrigerant to be heated, c is the latent heat of the refrigerant, p is the electric heating power, and k is a proportionality coefficient, where k may be the reciprocal of the energy conversion rate, and since the energy conversion rate of the heating device is generally less than 1, the value of k is greater than 1.
It should be noted that, in an ideal state of the above process, a method for calculating the second preset time duration may exist, but in practical application, a certain deviation often exists, a relationship between the second preset time duration and the power of the heating device only satisfies an approximately inverse ratio, and the calculated second preset time duration may have a certain error and cannot be accurately controlled.
After a second preset time, the liquid refrigerant in the heating device is completely evaporated into a gaseous state, and the liquid inlet valve is controlled to be opened at the moment, however, the amount of the liquid refrigerant entering the heating device is small, the supply speed of the liquid refrigerant in the heating device is lower than the evaporation speed, and in order to further prevent the heating device from being burned, the liquid inlet valve needs to be opened and the heating device needs to be controlled to be closed.
When the air conditioning system needs to use the heating device to heat the liquid refrigerant and evaporate the liquid refrigerant, the steps S102 and S103 are performed in a circulating manner.
According to the method for controlling the heating of the refrigerant for improving the stability, the liquid inlet valve of the heating device is controlled to be closed after being opened for a first preset time, the liquid inlet valve is controlled to be opened after being closed for a second preset time, the valve can be closed in time when the refrigerant of the heating device reaches the upper limit of the capacity, the liquid refrigerant is prevented from overflowing the heating device and entering the compressor to cause liquid impact, in addition, the closing time of the liquid inlet valve is determined according to the power of the heating device, the heating device is prevented from being burned dry, and the stability of the air conditioning equipment can be improved through the control scheme.
Example 2
The present embodiment provides a method for controlling refrigerant heating to improve stability, where the current methods for controlling a gas-liquid separator and a heating device are as follows:
s1, controlling the liquid inlet valve of the heating device to open so that the liquid refrigerant stored in the gas-liquid separator flows into the electric heating device;
s2, controlling the heating device to be started, and heating the liquid refrigerant to convert the liquid refrigerant into a gas state;
and S3, the gaseous refrigerant flows into the compressor.
The method of the present embodiment further includes, on the basis of the above steps, in order to ensure reliable operation of the unit, for the safety consideration that the pressure in the heating device is continuously increased when the liquid refrigerant is converted into the gaseous refrigerant under the heating of the electric heating, the method of the present embodiment further includes:
after the liquid inlet valve is opened, the opening time t1 of the liquid valve is determined according to the internal capacity of the electric heating device, the nominal diameter of the liquid inlet valve and the flow rate of the liquid refrigerant, the liquid inlet valve is controlled to be closed after the opening time t1, the situation that excessive refrigerant cannot enter the electric heating device is guaranteed, the liquid refrigerant is always located below the exhaust pipeline, and liquid is prevented from entering the press and causing liquid impact of the press.
And after the liquid inlet valve is controlled to be closed, the heating device is controlled to be opened, the closing time t2 of the liquid inlet valve is determined according to the power of electric heating and the evaporation latent heat of the adopted refrigerant, the liquid inlet valve is controlled to be opened after the time t2, and meanwhile, the heating device is controlled to be closed, so that the heating device is prevented from being burnt and damaged.
According to the refrigerant heating control method, the liquid refrigerant is prevented from overflowing the heating device and entering the compressor to cause liquid impact by controlling the opening time of the liquid inlet valve, the heating device is prevented from being dried, and the stability of the air conditioning equipment can be improved by the control scheme.
Example 3
Fig. 3 is a block diagram of a refrigerant heating control device according to an embodiment of the present invention, and as shown in fig. 3, the refrigerant heating control device includes: the first control module 21 is configured to control an inlet valve of the heating device to open, so that the refrigerant in the gas-liquid separator flows into the heating device, and in an initial state, there is no liquid refrigerant in the heating device, if the heating device is turned on at this time, the heating device is in a dry-burning state, if the heating device is continuously dried, the heating device is damaged, and further stability of the apparatus is reduced, if the inlet valve is controlled to open while the heating device is turned on, under the condition that heating power of the heating device is high, an evaporation rate of the liquid refrigerant is high, if the liquid refrigerant in the heating device is not replenished in time, dry burning may still be caused, in order to prevent the problem of dry burning, it is required to ensure that a sufficient amount of refrigerant is already in the heating device before the heating device is turned on, and therefore, before the heating device is turned on, the inlet valve of the heating device is first controlled to open, the liquid refrigerant collected by the gas-liquid separator enters a heating device;
the second control module 22 is configured to control the liquid inlet valve to be closed after the first preset time period is started, where the first preset time period is determined according to a flow rate of a refrigerant in a pipeline between the gas-liquid separator and the heating device, after the liquid inlet valve of the heating device is started, the liquid refrigerant in the gas-liquid separator starts to flow into the heating device, if the liquid inlet valve is started for too long, the liquid refrigerant in the heating device accumulates more and exceeds a horizontal line where an exhaust port of the heating device is located, the liquid refrigerant will flow out from the exhaust port and directly enter the compressor, so that liquid impact on the compressor is caused, in order to avoid this situation, it is required to ensure that a liquid level of the liquid refrigerant does not exceed the exhaust port of the heating device, and to achieve this purpose, it is required to control the time period during which the liquid inlet valve is opened to be longest and cannot exceed a time period, therefore, the second control module 22 controls the liquid inlet valve to be closed after the liquid inlet valve is opened for a first preset time;
the third control module 23 is configured to control the liquid inlet valve to be opened after the liquid inlet valve is closed for a second preset time period, where the second preset time period is determined according to the power of the heating device, after the liquid inlet valve is closed, the heating device is controlled to be opened to heat the liquid refrigerant, but after a certain time period, the liquid refrigerant in the heating device is completely evaporated into a gas state, and at this time, the liquid inlet valve is in a closed state, and no new liquid refrigerant is supplemented, which may cause dry burning of the heating device, so that after the liquid refrigerant in the heating device is completely evaporated into a gas state, the liquid inlet valve needs to be controlled to be opened again through the third control module 23.
Fig. 4 is a block diagram of a refrigerant heating control device according to another embodiment of the present invention, in order to determine the time when the liquid level of the liquid refrigerant reaches the air outlet of the heating device, as shown in fig. 4, the device further includes:
the flow rate monitoring module 24 is configured to monitor a flow rate of the refrigerant in the pipeline, and the flow rate monitoring module 24 may be a liquid flow rate sensor and is disposed on the pipeline between the gas-liquid separator and the heating device;
a first determining module 25, configured to determine the first preset time period according to the flow rate of the refrigerant, the internal capacity of the heating device, and the nominal diameter of the valve, where the first determining module is a calculating circuit, and under the condition that the flow rate of the refrigerant, the internal capacity of the heating device, and the nominal diameter of the valve are known, according to a formula:
In order to confirm that the liquid refrigerant in the heating device is completely evaporated into a gaseous state, as shown in fig. 4, on the basis of the above embodiment, the device further includes: the second determining module 26 is configured to obtain the power of the heating device, and determine a second preset time corresponding to the power, where the second determining module 26 includes a power detection circuit configured to detect the current power of the heating device, a calculation circuit configured to calculate a time required for all liquid refrigerants in the heating device to evaporate into a gaseous state, that is, a second preset time, according to the power of the heating device, the amount of liquid refrigerants in the heating device, and the latent heat of evaporation of the refrigerants, or includes a retrieving unit configured to retrieve, according to a correspondence between the time required for all liquid refrigerants prestored in the control device to evaporate into a gaseous state and the power of the heating device, a time required for all liquid refrigerants corresponding to the current power to evaporate into a gaseous state, as the second preset time.
After a second preset time period, the liquid refrigerant in the heating device is completely evaporated into a gaseous state, and at this time, the liquid inlet valve is controlled to be opened, but at this time, the amount of the liquid refrigerant entering the heating device is small, and the replenishment speed of the liquid refrigerant in the heating device is lower than the evaporation speed, and in order to further prevent the heating device from being burned dry, the heating device needs to be controlled to be closed while the liquid inlet valve is opened, so as shown in fig. 4, on the basis of the above embodiment, the apparatus further includes: and a fourth control module 27, configured to control the liquid inlet valve to be opened and control the heating device to be closed while the liquid inlet valve is closed for a second preset time.
The refrigerant heating control device of promotion stability of this embodiment, it is closed after the first predetermined duration of opening at the feed liquor valve through the second control module, after the second predetermined duration of closing at the feed liquor valve, it opens again to control, can be when heating device's refrigerant reachs the upper limit of capacity, in time close this valve, avoid liquid refrigerant to spill over heating device, get into the compressor, cause the liquid to hit, in addition, according to heating device's power, confirm the time that this feed liquor valve was closed, avoid heating device dry combustion, through above control scheme, can promote air conditioning equipment's stability.
Example 4
The embodiment provides an air conditioning equipment, which comprises the refrigerant heating control device for improving the stability.
Example 5
The present embodiments provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described method.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A refrigerant heating control method is characterized by comprising the following steps:
controlling the opening of a liquid inlet valve of a heating device to enable the refrigerant in the gas-liquid separator to flow into the heating device; the heating device comprises a heating tank for containing liquid refrigerant and a heating component, the gas-liquid separator is communicated with the heating tank through a pipeline, a liquid inlet valve is arranged on the pipeline, the liquid refrigerant collected by the gas-liquid separator flows into the heating tank, the liquid refrigerant in the heating tank is heated by the heating component to be evaporated into a gas state, and the gas refrigerant is discharged through an exhaust port of the heating device and returns to the compressor;
controlling the liquid inlet valve to be closed after the liquid inlet valve is opened for a first preset time period, wherein the first preset time period is determined according to the flow rate of a refrigerant in a pipeline between the gas-liquid separator and the heating device; the above-mentioned
V is the internal capacity of the heating device, D is the nominal diameter of the valve, and upsilon is the flow velocity of the refrigerant in the pipeline;
and after the liquid inlet valve is closed for a second preset time period, controlling the liquid inlet valve to be opened, wherein the second preset time period is determined according to the power of the heating device.
2. The method of claim 1, wherein after controlling the inlet valve of the heating device to open, the method further comprises:
monitoring the flow rate of the refrigerant in the pipeline;
and determining the first preset time according to the flow rate of the refrigerant, the internal capacity of the heating device and the nominal diameter of the valve.
3. The method of claim 1, wherein after controlling the intake valve to close after opening for a first preset period of time, the method further comprises:
and acquiring the power of the heating device, and determining a second preset time corresponding to the power, wherein the second preset time has a preset corresponding relation with the power of the heating device.
4. The method of claim 3, wherein the predetermined correspondence is:
T＝k*m*c/p
wherein m is the mass of the refrigerant to be heated, c is the latent heat of the refrigerant, p is the power of electric heating, and k is the energy efficiency coefficient.
5. The method of claim 1, wherein after the liquid inlet valve is closed for a second preset time period, the method further comprises, while controlling the liquid inlet valve to be opened:
and controlling the heating device to be closed.
6. A refrigerant heating control device, the device comprising:
the first control module is used for controlling the opening of a liquid inlet valve of the heating device so as to enable the refrigerant in the gas-liquid separator to flow into the heating device; the heating device comprises a heating tank for containing liquid refrigerant and a heating component, the gas-liquid separator is communicated with the heating tank through a pipeline, a liquid inlet valve is arranged on the pipeline, the liquid refrigerant collected by the gas-liquid separator flows into the heating tank, the liquid refrigerant in the heating tank is heated by the heating component to be evaporated into a gas state, and the gas refrigerant is discharged through an exhaust port of the heating device and returns to the compressor;
the second control module is used for controlling the liquid inlet valve to be closed after the first preset time period is started, wherein the first preset time period is determined according to the flow rate of a refrigerant in a pipeline between the gas-liquid separator and the heating device; the above-mentioned
V is the internal capacity of the heating device, D is the nominal diameter of the valve, and upsilon is the flow velocity of the refrigerant in the pipeline;
and the third control module is used for controlling the liquid inlet valve to be opened after the liquid inlet valve is closed for a second preset time period, wherein the second preset time period is determined according to the power of the heating device.
7. The apparatus of claim 6, further comprising:
the flow rate monitoring module is used for monitoring the flow rate of the refrigerant in the pipeline;
and the first determining module is used for determining the first preset time according to the flow rate of the refrigerant, the internal capacity of the heating device and the nominal diameter of the valve.
8. The apparatus of claim 6, further comprising:
and the second determining module is used for acquiring the power of the heating device and determining a second preset time corresponding to the power.
9. The apparatus of claim 6, further comprising:
and the fourth control module is used for controlling the liquid inlet valve to be opened and controlling the heating device to be closed at the same time after the liquid inlet valve is closed for a second preset time.
10. An air conditioning apparatus, characterized by comprising the refrigerant heating control device according to any one of claims 6 to 9.
11. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010120898.1A CN111306855B (en) | 2020-02-26 | 2020-02-26 | Refrigerant heating control method and device for improving stability and air conditioning equipment |
| PCT/CN2020/138168 WO2021169533A1 (en) | 2020-02-26 | 2020-12-22 | Refrigerant heating control method and apparatus capable of improving stability, and air conditioning device |
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| CN202010120898.1A CN111306855B (en) | 2020-02-26 | 2020-02-26 | Refrigerant heating control method and device for improving stability and air conditioning equipment |
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| CN111306855B (en) * | 2020-02-26 | 2021-01-08 | 珠海格力电器股份有限公司 | Refrigerant heating control method and device for improving stability and air conditioning equipment |
| CN111578442B (en) * | 2020-05-12 | 2022-06-17 | 宁波奥克斯电气股份有限公司 | Liquid return prevention control method and device for compressor and air conditioner |
| CN114484728B (en) * | 2022-01-25 | 2023-09-08 | 宁波奥克斯电气股份有限公司 | Control method and device for liquid return protection of air conditioner and air conditioner |
| CN114704933B (en) * | 2022-02-18 | 2023-12-19 | 青岛海尔空调器有限总公司 | Method and device for controlling direct-current air conditioner and air conditioner |
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| CN111306855A (en) | 2020-06-19 |
| WO2021169533A1 (en) | 2021-09-02 |
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