CN111237972B - Anti-freezing control method and device for generator and air conditioning unit - Google Patents
Anti-freezing control method and device for generator and air conditioning unit Download PDFInfo
- Publication number
- CN111237972B CN111237972B CN202010060568.8A CN202010060568A CN111237972B CN 111237972 B CN111237972 B CN 111237972B CN 202010060568 A CN202010060568 A CN 202010060568A CN 111237972 B CN111237972 B CN 111237972B
- Authority
- CN
- China
- Prior art keywords
- generator
- unit
- temperature
- controlling
- generators
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
-
- 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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a generator anti-freezing control method and device and an air conditioning unit. Wherein, the method comprises the following steps: judging whether a generator for power failure exists in the unit; if so, controlling the valve at the inlet end of the generator with power failure in the unit to be closed, detecting the temperature of the outdoor environment, and controlling the unit to stop or continue to operate according to the temperature of the outdoor environment; and if not, keeping an inlet valve of the generator for controlling the power failure in the unit open. By the aid of the device and the method, when a generator in the unit is powered off, the inlet valve of the generator can be closed in time, the plate heat exchanger is effectively prevented from frost cracking, and reliability of the unit is improved.
Description
Technical Field
The invention relates to the technical field of units, in particular to a generator anti-freezing control method and device and an air conditioning unit.
Background
The heat recovery system developed at present can be matched with a generator to realize hot water production. Mainly through the generator, carry out the heat transfer with water and refrigerant, promote hot water temperature and satisfy user's demand. If the generator suddenly cuts off the power supply and shuts down, shut down the back at the generator, its self throttling component still keeps the state before the outage, if the generator is in the running state before the outage, then the generator throttling component still is in the open mode after the outage, if this moment just under low temperature environment, because unit refrigerant temperature is lower under the low temperature environment, after the low temperature refrigerant gets into plate heat exchanger, can lead to plate heat exchanger water side temperature to drop sharply, freeze even, easily cause plate heat exchanger frost crack, cause whole heat recovery system to become invalid, cause great economic loss to the user.
Aiming at the problem that a plate heat exchanger is frost-cracked after a generator is powered off under a low-temperature condition in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a generator anti-freezing control method and device and an air conditioning unit, and aims to solve the problem that a plate heat exchanger is frozen and cracked after a generator is powered off under a low-temperature condition in the prior art.
In order to solve the technical problem, the invention provides a generator anti-freezing control method, wherein the method comprises the following steps:
judging whether a generator for power failure exists in the unit;
if so, controlling the valve at the inlet end of the generator with power failure in the unit to be closed, detecting the temperature of the outdoor environment, and controlling the unit to stop or continue to operate according to the temperature of the outdoor environment;
and if not, keeping an inlet valve of the generator for controlling the power failure in the unit open.
Further, judge whether there is the generator of outage in the unit, include:
acquiring the number of generators in normal operation;
if the number of the generators in normal operation is less than the total number of the generators in the unit and lasts for a first preset time, judging that the generators in the unit are powered off;
and if the number of the generators in normal operation is equal to the total number of the generators in the unit, judging that no generator in power failure exists in the unit.
Further, controlling the unit to stop or continue to operate according to the temperature of the outdoor environment comprises:
if the temperature of the outdoor environment is greater than or equal to a first preset temperature, controlling the unit to continue to operate;
and if the temperature of the outdoor environment is lower than the first preset temperature, controlling the unit to stop.
Further, after controlling the unit to continue operating, the method further comprises:
sequentially detecting the temperature of the outlet end pipeline of the generator with power failure;
and controlling an inlet valve of the power-off generator to be opened or kept closed according to the temperature of an outlet pipeline of the power-off generator.
Further, controlling an inlet valve of the de-energized generator to open or remain closed based on an outlet end line temperature of the de-energized generator, includes:
if the temperature of the pipeline at the outlet end of the generator is greater than or equal to a second preset temperature, controlling the valve at the inlet end of the corresponding generator to be kept closed;
and if the temperature of the outlet end pipeline of the generator is lower than a second preset temperature, controlling the opening of an inlet end valve of the corresponding generator to enable the high-temperature refrigerant to enter the generator.
Further, after controlling the inlet valve of the corresponding generator to be opened, the method further comprises:
and after the preset time, controlling the valve at the inlet end of the corresponding generator to be closed.
Further, while controlling the closing of the inlet end valve of the de-energized generator in the unit, the method further comprises:
controlling the unit to display fault information of the generator; and/or the presence of a gas in the gas,
and the control unit sends a generator fault alarm.
The invention also provides a generator anti-freezing control device, based on the generator anti-freezing control method, the device comprises:
the judging module is used for judging whether a generator for power failure exists in the unit;
the control system comprises a first control module, a second control module and a control module, wherein the first control module is used for controlling the closing of an inlet end valve of a power-off generator in a unit when the power-off generator exists in the unit;
the second control module is used for controlling an inlet end valve of the generator with power failure in the unit to be kept open when the generator with power failure does not exist in the unit;
the temperature detection module is used for detecting the temperature of the outdoor environment;
and the third control module is used for controlling the unit to stop or continue to operate according to the temperature of the outdoor environment.
Further, the judging module comprises:
the acquisition unit is used for acquiring the number of generators in normal operation;
the first judgment unit is used for judging that the generator with power failure exists in the unit when the number of the generators in normal operation is smaller than the total number of the generators in the unit and lasts for a first preset time;
and the second judging unit is used for judging that no generator with power failure exists in the unit when the number of the generators in normal operation is equal to the total number of the generators in the unit.
Further, the third control module includes:
the first control unit is used for controlling the unit to continuously operate when the temperature of the outdoor environment is greater than or equal to a first preset temperature;
and the second control unit is used for controlling the unit to stop when the temperature of the outdoor environment is lower than the first preset temperature.
The invention also provides an air conditioning unit which is characterized by comprising the generator anti-freezing control device.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described generator freeze protection control method.
By applying the technical scheme, whether a generator with power failure exists or not is judged, if the generator with power failure exists, the occurrence of the frost cracking risk is indicated, so that the inlet end valve of the generator with power failure in the unit is controlled to be closed, the unit is controlled to be stopped or continuously run according to the outdoor environment temperature, low-temperature refrigerants are prevented from entering the generator, if the generator with power failure does not exist, the frost cracking risk is eliminated, the inlet end valve of the generator with power failure in the unit is controlled to be opened, the normal running is ensured, and through the scheme, the inlet end valve of the generator can be closed in time when the generator with power failure in the unit occurs, the frost cracking of the plate heat exchanger is effectively prevented, and the reliability of the unit is improved.
Drawings
FIG. 1 is a block system employing the generator freeze protection control method of the present invention;
FIG. 2 is a flow chart of a generator freeze protection control method according to an embodiment of the present invention;
FIG. 3 is a block diagram of a generator freeze protection control apparatus according to an embodiment of the present invention;
FIG. 4 is a block diagram of a generator freeze protection control apparatus according to another embodiment of the present invention;
fig. 5 is a structural view of a hair freeze prevention control apparatus according to still another embodiment of the present 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 temperatures in embodiments of the present invention, the preset temperatures should not be limited to these terms. These terms are only used to distinguish between different preset temperatures. For example, the first preset temperature may also be referred to as a second preset temperature, and similarly, the second preset temperature may also be referred to as a first preset temperature 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 unit system using the generator anti-freezing control method of the present invention, and as shown in fig. 1, the unit includes: the indoor heat exchanger 12 comprises an inlet end valve 121, an outlet end valve 122 and a mode converter 16, the inlet end of the mode converter 16 is connected with the exhaust end of the compressor 11, the outlet end of the mode converter 16 is connected with the inlet end of the outdoor heat exchanger 14, and the indoor heat exchanger 12 further comprises at least one generator 13, in the embodiment, 2 generators are taken as an example, an inlet pipeline and an outlet pipeline of the generator 13 are connected with the mode converter 16, so that high-temperature and high-pressure refrigerants discharged by the compressor 11 are obtained, heat exchange is performed in the generator, and the generator is used for heating water or serves as a floor heating heat supply source.
The inlet of the generator 13 includes an inlet valve 131 disposed on the inlet side pipeline and an outlet valve 132 disposed on the outlet side pipeline.
Based on the above unit system, the present embodiment provides a generator anti-freezing control method, and fig. 2 is a flowchart of the generator anti-freezing control method according to the embodiment of the present invention, as shown in fig. 2, the method includes:
s101, judging whether a generator for power failure exists in a unit;
if yes, executing step S102;
if not, executing step S103;
s102, controlling the valve at the inlet end of the generator with power failure in the unit to be closed, detecting the temperature of the outdoor environment, and controlling the unit to stop or continue to operate according to the temperature of the outdoor environment.
When a generator with power failure exists in a unit, an inlet end valve of the generator with power failure is likely to be kept open, if low-temperature liquid flows into the generator, a plate heat exchanger in the generator is at risk of frost cracking, therefore, the inlet end valve of the generator with power failure in the unit is controlled to be closed, meanwhile, the outdoor environment temperature is detected, if the outdoor environment temperature controls the unit to be stopped or continuously run, in the specific implementation, in the debugging process of the unit, information and serial numbers of all generators in the unit can be recorded first, and when the generator with power failure is judged, the generator with power failure can be determined according to the information and serial numbers recorded in advance;
s102, controlling an inlet valve of the generator with power failure in the unit to be kept open.
If none of the generators are de-energized, it indicates that all generators are operating properly, and thus the inlet valve controlling the de-energized generator remains open.
Because the number of generators in the system is fixed, if the situation that one or more generators are powered off occurs, the number of generators in the unit is reduced, therefore, counting the number of generators capable of communicating with the main controller in the unit can reflect the number of generators which normally operate in the system at present, specifically, judging whether the generator of the power off exists in the unit includes: acquiring the number of generators in normal operation, wherein the generators in normal operation can communicate with a main controller of a unit; if the number of the generators in normal operation is less than the total number of the generators in the unit and lasts for a first preset time, judging that the generators in the unit are powered off; and if the number of the generators in normal operation is equal to the total number of the generators in the unit, judging that no generator in power failure exists in the unit.
The generator that has the outage in judging the unit to control the back is closed to the import end valve of the generator of outage, because whether the generator frost crack is relevant with external environment temperature, if outdoor environment temperature is higher, then the risk of frost crack obviously reduces, consequently can make the unit keep normal operating, if outdoor environment temperature is low excessively, then need control the unit and shut down, according to the temperature control unit shut down or continue the operation of outdoor environment, include: if the temperature of the outdoor environment is greater than or equal to a first preset temperature, controlling the unit to continue to operate; and if the temperature of the outdoor environment is lower than the first preset temperature, controlling the unit to stop, wherein the first preset temperature is determined according to an experimental value or an empirical value, and even if a refrigerant flows into the generator, the frost crack of the plate heat exchanger in the generator can not be caused at the temperature.
Because the control the generator of outage's entrance point valve is closed the back, the refrigerant has been unable to get into the generator, but original refrigerant still remains in the generator, flows out slowly under the suction effect of exit end pipeline, but if the temperature of the refrigerant that flows out the generator is low excessively, indicate that the refrigerant temperature in the generator is lower, plate heat exchanger has the frost crack risk, but, if the unit is normal operating this moment, indicate that outdoor environment temperature is higher, the temperature of the refrigerant of inflow mode converter is higher, can take out the low temperature refrigerant in the generator through introducing high temperature refrigerant to prevent plate heat exchanger frost crack in the generator, consequently, control the unit continues after the operation, the method still includes: sequentially detecting the temperature of the outlet end pipeline of the generator which is powered off; and controlling an inlet valve of the power-off generator to be opened or kept closed according to the temperature of the outlet pipeline of the power-off generator. Specifically, if the temperature of the outlet end pipeline of the generator is greater than or equal to a second preset temperature, the temperature of the refrigerant in the generator is higher at the moment, and therefore the inlet end valve of the corresponding generator is controlled to be kept closed; if the temperature of the outlet end pipeline of the generator is lower than the second preset temperature, the temperature of the refrigerant in the generator is low, and the plate heat exchanger has the risk of frost crack, so that the inlet end valve of the corresponding generator is controlled to be opened, high-temperature refrigerant enters the generator, low-temperature refrigerant in the generator is taken out, and the frost crack of the plate heat exchanger in the generator is prevented. After the preset time, the low-temperature refrigerants in the generator are all taken out, the valve at the inlet end of the corresponding generator is controlled to be closed, the second preset temperature is set according to an experimental value or an empirical value, when the temperature of the refrigerants flowing out of the generator is required to be higher than the second preset temperature, the plate heat exchanger in the generator cannot be frozen, and when the temperature of the refrigerants flowing out of the generator does not reach the second preset temperature, the plate heat exchanger has the risk of freezing and cracking.
In order to ensure that the generator with power failure can be checked and repaired in time after the valve at the inlet end of the generator is controlled to be closed when the generator with power failure is judged to exist, the method also comprises the following steps of controlling the valve at the inlet end of the generator with power failure in a unit to be closed: controlling the unit to display fault information of the generator; and/or the control unit sends a generator fault alarm to remind personnel on site or in front of the master control port of paying attention to the occurrence of the generator power failure, so that the troubleshooting and the repairing can be carried out in time.
According to the generator anti-freezing control method, whether a generator with power failure exists or not is judged, if the generator with power failure exists, the fact that the generator with power failure has the frost crack risk is indicated, therefore, the inlet end valve of the generator with power failure in a unit in the unit is controlled to be closed, the unit is controlled to be stopped or continue to operate according to the outdoor environment temperature, low-temperature refrigerants are prevented from entering the generator, if the generator with power failure does not exist, the frost crack risk is eliminated, the inlet end valve of the generator with power failure in the unit is controlled to be opened, normal operation is guaranteed, through the scheme, the inlet end valve of the generator can be closed timely when the generator with power failure in the unit, the frost crack of a plate type heat exchanger is effectively prevented, and the reliability of the unit is improved.
Example 2
The embodiment provides another generator anti-freezing control method, which comprises the following steps:
s1, after the system is installed, the system is powered on for the first time to debug, which includes: detecting the number of the external machines, the number of the internal machines, the number of the converters and the number of the generators, and storing information of the memory machine set;
s2, after debugging is completed, detecting the number of generators in current operation by the unit in the standby or operation process, if the number of generators in current operation, namely the number of memory generators, is detected by the continuous Ns of the unit and is less than 0, judging that the number of generators in the system is missing, controlling the valve at the inlet end of the generator with power failure to be closed, and after the refrigerant stops entering the generator, performing the step S3:
s3, detecting the ambient temperature of the unit; if the ambient temperature of the unit is not less than T, the plate heat exchanger of the generator has no risk of freezing, and step S4 is executed; if the ambient temperature of the unit is less than T, the risk of freezing of the plate heat exchanger of the generator is high, and step S5 is executed;
s4, controlling the unit to continue to operate without stopping;
and S5, controlling the unit to stop.
After the steps are executed, the unit can also send fault codes and fault information outwards, a user can check the fault codes and the fault information through the internal manual operator, the internal display, the centralized controller and the monitoring device, the user can know the number of the generators is lost through inquiry, the reason of the loss of the generators is checked, meanwhile, an alarm can be sent outwards to remind the user that the generators are lost, and the user can check and maintain the whole system at the first time with less economic loss.
The embodiment provides a generator emergency power-down mode, which is characterized in that the generator is determined to be in a power-off state through system communication detection or system parameter detection, so that a valve at the inlet end of the generator is closed, a refrigerant is blocked from flowing into the generator, a generator plate is ensured to enable the water temperature of a heat exchanger to be above the safe temperature, and the purpose of protecting a plate type heat exchanger is achieved.
Example 3
The present embodiment provides a generator freeze-proofing control device, based on the above-mentioned generator freeze-proofing control method, and fig. 3 is a structural diagram of the generator freeze-proofing control device according to the embodiment of the present invention, as shown in fig. 3, the device includes:
the judging module 31 is used for judging whether a generator for power failure exists in the unit; a first control module 32 for controlling the closing of an inlet end valve of a de-energized generator in a unit when the de-energized generator is present in the unit; a second control module 33 for controlling an inlet valve of a generator in a power outage in a unit to remain open when the generator in the power outage is not present in the unit; a first temperature detection module 34 for detecting the temperature of the outdoor environment; and a third control module 35, configured to control the unit to stop or continue to operate according to the temperature of the outdoor environment.
FIG. 4 is a block diagram of a generator freeze protection control apparatus according to another embodiment of the present invention; since the number of generators in the system is fixed, if one or more generators are powered off, the number of generators in the unit is reduced, so that counting the number of generators in the unit that can communicate with the main controller can reflect the number of generators in the system that are currently operating normally, and therefore, as shown in fig. 4, the determining module 31 includes: an obtaining unit 311, configured to obtain the number of generators in normal operation; a first determining unit 312, configured to determine that there is a generator in the unit that is powered off when the number of generators in normal operation is less than the total number of generators in the unit and lasts for a first preset time; and a second determining unit 313, configured to determine that there is no generator with power failure in the unit when the number of generators in normal operation is equal to the total number of generators in the unit.
Because whether the generator frost crack is related to external environment temperature, if outdoor environment temperature is higher, then the risk of frost crack obviously reduces, consequently can make the unit keep normal operating, if outdoor environment temperature is too low, then need control unit shut down, consequently, third control module 35 includes: the first control unit 351 is used for controlling the unit to continuously operate when the temperature of the outdoor environment is greater than or equal to a first preset temperature; a second control unit 352, configured to control the unit to stop when the temperature of the outdoor environment is less than the first preset temperature.
Fig. 5 is a structural diagram of an anti-freezing control device for a generator according to another embodiment of the present invention, in which after an inlet valve of the generator controlling the power failure is closed, refrigerant cannot enter the generator, but the refrigerant in the generator is still retained in the generator, and slowly flows out under the suction of an outlet pipeline, but if the temperature of the refrigerant flowing out of the generator is too low, it indicates that the temperature of the refrigerant in the generator is low, and the plate heat exchanger has a risk of frost cracking, and at this time, if the unit is operating normally, it indicates that the outdoor environment temperature is high, and the temperature of the refrigerant flowing into the mode converter is high, a high-temperature refrigerant can be introduced to take out the low-temperature refrigerant in the generator, so as to prevent the plate heat exchanger in the generator from frost cracking, and as shown in fig. 5, on the basis of the above embodiment, the device further includes: a second temperature detection module 36 for detecting the outlet end pipeline temperature of the generator with power failure; and a fourth control module 37 for controlling the inlet valve of the generator to open or close according to the outlet pipeline temperature of the generator.
Specifically, the fourth control module 37 includes: the third control unit 371 is used for controlling the inlet valve of the corresponding generator to be kept closed when the outlet pipeline temperature of the generator is greater than or equal to a second preset temperature; and a fourth control unit 372, which controls the inlet valve of the corresponding generator to open when the temperature of the outlet pipeline of the generator is lower than a second preset temperature, so that the high-temperature refrigerant enters the generator.
The fourth control module 37 further includes: and a fifth control unit 373 for controlling the valves at the inlet ends of the respective generators to be closed after the lapse of a preset time.
To address a fault condition, the apparatus further comprises: an alarm module 38 for controlling the unit to display generator fault information; and/or, the control unit sends a generator fault alarm.
Through the generator freeze-proof control device of this embodiment, in the generator time control unit of existence outage the entrance point valve of the generator of outage is closed to shut down or continue the operation according to outdoor ambient temperature control unit, avoid the low temperature refrigerant to get into the generator, if there is not the generator of outage, then get rid of the frost crack risk, in the control unit the entrance point valve of the generator of outage is opened, guarantees normal operating, can realize when having the generator to take place the outage in the unit, in time closes the entrance point valve of generator, effectively prevents plate heat exchanger frost crack, promotes the reliability of unit.
Example 4
The embodiment provides an air conditioning unit, which comprises the generator anti-freezing control device in the implementation.
Example 5
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the generator freeze protection control method in the above-described embodiments.
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 parts displayed as units may or may not be physical units, 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 (10)
1. A generator freeze protection control method, the method comprising:
judging whether a generator for power failure exists in the unit;
if so, controlling the valve at the inlet end of the generator with power failure in the unit to be closed, detecting the temperature of the outdoor environment, and controlling the unit to stop or continue to operate according to the temperature of the outdoor environment; after the unit is controlled to continue to operate, the method further comprises the following steps: sequentially detecting the temperature of the outlet end pipeline of the generator with power failure; controlling an inlet valve of the de-energized generator to open or remain closed according to an outlet pipeline temperature of the de-energized generator, comprising: if the temperature of the pipeline at the outlet end of the generator is greater than or equal to a second preset temperature, controlling the valve at the inlet end of the corresponding generator to be kept closed; if the temperature of the outlet end pipeline of the generator is lower than a second preset temperature, controlling the opening of an inlet end valve of the corresponding generator to enable a high-temperature refrigerant to enter the generator;
and if not, keeping an inlet valve of the generator for controlling the power failure in the unit open.
2. The method of claim 1, wherein determining whether a generator of a power outage is present in the unit comprises:
acquiring the number of generators in normal operation;
if the number of the generators in normal operation is less than the total number of the generators in the unit and lasts for a first preset time, judging that the generators in the unit are powered off;
and if the number of the generators in normal operation is equal to the total number of the generators in the unit, judging that no generator in power failure exists in the unit.
3. The method of claim 1, wherein controlling the unit to shutdown or continue operating based on the temperature of the outdoor environment comprises:
if the temperature of the outdoor environment is greater than or equal to a first preset temperature, controlling the unit to continue to operate;
and if the temperature of the outdoor environment is lower than the first preset temperature, controlling the unit to stop.
4. The method of claim 1, wherein after controlling the inlet valve of the respective generator to open, the method further comprises:
and after the preset time, controlling the valve at the inlet end of the corresponding generator to be closed.
5. The method of claim 1, wherein while controlling the closing of an inlet end valve of the de-energized generator in the unit, the method further comprises:
controlling the unit to display fault information of the generator; and/or the presence of a gas in the gas,
and the control unit sends a generator fault alarm.
6. A generator freeze protection control device based on the method of any one of claims 1 to 5, characterized in that the device comprises:
the judging module is used for judging whether a generator for power failure exists in the unit;
the control system comprises a first control module, a second control module and a control module, wherein the first control module is used for controlling the closing of an inlet end valve of a power-off generator in a unit when the power-off generator exists in the unit;
the second control module is used for controlling an inlet end valve of the generator with power failure in the unit to be kept open when the generator with power failure does not exist in the unit;
the temperature detection module is used for detecting the temperature of the outdoor environment;
the third control module is used for controlling the unit to stop or continue to operate according to the temperature of the outdoor environment;
the device further comprises: the second temperature detection module is used for detecting the temperature of the outlet end pipeline of the power-off generator; the fourth control module is used for controlling an inlet valve of the power-off generator to be opened or kept closed according to the temperature of an outlet pipeline of the power-off generator;
specifically, the fourth control module includes: the third control unit is used for controlling the inlet valve of the corresponding generator to be kept closed when the outlet pipeline temperature of the generator is greater than or equal to a second preset temperature; and the fourth control unit is used for controlling the opening of the corresponding inlet valve of the generator when the temperature of the outlet pipeline of the generator is lower than the second preset temperature, so that the high-temperature refrigerant enters the generator.
7. The apparatus of claim 6, wherein the determining module comprises:
the acquisition unit is used for acquiring the number of generators in normal operation;
the first judgment unit is used for judging that the generator with power failure exists in the unit when the number of the generators in normal operation is smaller than the total number of the generators in the unit and lasts for a first preset time;
and the second judging unit is used for judging that no generator with power failure exists in the unit when the number of the generators in normal operation is equal to the total number of the generators in the unit.
8. The apparatus of claim 6, wherein the third control module comprises:
the first control unit is used for controlling the unit to continuously operate when the temperature of the outdoor environment is greater than or equal to a first preset temperature;
and the second control unit is used for controlling the unit to stop when the temperature of the outdoor environment is lower than the first preset temperature.
9. An air conditioning assembly, characterized by comprising a generator freeze protection control device according to any one of claims 6 to 8.
10. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing a generator freeze protection control method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060568.8A CN111237972B (en) | 2020-01-19 | 2020-01-19 | Anti-freezing control method and device for generator and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060568.8A CN111237972B (en) | 2020-01-19 | 2020-01-19 | Anti-freezing control method and device for generator and air conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237972A CN111237972A (en) | 2020-06-05 |
| CN111237972B true CN111237972B (en) | 2021-08-03 |
Family
ID=70879668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010060568.8A Active CN111237972B (en) | 2020-01-19 | 2020-01-19 | Anti-freezing control method and device for generator and air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111237972B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203478621U (en) * | 2013-08-13 | 2014-03-12 | 江苏天舒电器有限公司 | Anti-frozen controller used in heat pump water heater |
| CN104633925A (en) * | 2013-11-15 | 2015-05-20 | 广东美的暖通设备有限公司 | Heat pump hot water machine system and control method thereof |
| CN107166741B (en) * | 2017-06-19 | 2019-10-01 | 广东美的暖通设备有限公司 | Heat pump unit and its anti-freeze control method |
| JP6812942B2 (en) * | 2017-10-11 | 2021-01-13 | 三菱電機株式会社 | Hot water storage type hot water supply device |
| CN207865718U (en) * | 2018-02-06 | 2018-09-14 | 马鞍山市博浪热能科技有限公司 | A kind of Teat pump boiler for the alarm that has a power failure |
| CN110553345A (en) * | 2019-09-12 | 2019-12-10 | 珠海格力电器股份有限公司 | Automatic unit anti-freezing method and air conditioning system |
-
2020
- 2020-01-19 CN CN202010060568.8A patent/CN111237972B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111237972A (en) | 2020-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109340901B (en) | Anti-freezing control method for low-temperature air source heat pump heating machine | |
| CN109506319A (en) | Heating machine and its automatic freezing-protective control method | |
| CN111271821B (en) | Four-way valve reversing abnormity control method, storage medium and air conditioner | |
| CN103375874A (en) | Air conditioner and refrigerant circulation abnormality protection control method for same | |
| CN110220269B (en) | Anti-freezing control method and system for fan coil and air conditioner | |
| CN105588285A (en) | Air conditioner based on pipeline blocking self-diagnosis method | |
| CN109990439A (en) | A kind of control method, control device and air conditioner that the commutation of air-conditioning four-way valve is abnormal | |
| CN111059691B (en) | Control method and device of air source heat pump air conditioner, storage medium and air conditioner | |
| CN106462917A (en) | HVAC system remote monitoring and diagnosis of refrigerant line obstruction | |
| CN110440439A (en) | A kind of low temperature antifreeze control method of heat pump water dispenser system | |
| JP2018501425A (en) | Turbine power generation system provided with emergency operation means and emergency operation method thereof | |
| CN110285541B (en) | Multi-split air conditioner leakage position automatic positioning method, device and equipment | |
| CN110017568B (en) | Fan coil anti-freezing control method and device and air conditioner | |
| CN114151929A (en) | Heat pump air conditioning unit, anti-freezing control method and device thereof and storage medium | |
| CN111237972B (en) | Anti-freezing control method and device for generator and air conditioning unit | |
| US20220282885A1 (en) | Expansion valve control method for multi-connection air-conditioning system | |
| CN114165901A (en) | Water pump circulation control method and device, computer equipment and storage medium | |
| CN109269007B (en) | Control method and control system for household water machine and air conditioner | |
| CN111765648A (en) | Anti-freezing control method, processor and air source heat pump system | |
| KR101520236B1 (en) | air conditioner with freeze protection system and freeze protection method for the air conditioner | |
| JP5890039B2 (en) | Fuel cell-based heat recovery device and operation method thereof | |
| CN115789963A (en) | Heat pump hot water unit and water leakage detection method and detection device thereof | |
| CN103629762A (en) | A system and method for improving efficiency of a refrigerant based system | |
| JP3579440B2 (en) | Self-check method of temperature sensor in large capacity hot water supply system with combined heat source | |
| CN202868906U (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |