CN106766219B - Anti-freezing control method, device and system for heat pump water machine - Google Patents
Anti-freezing control method, device and system for heat pump water machine Download PDFInfo
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- CN106766219B CN106766219B CN201611153338.6A CN201611153338A CN106766219B CN 106766219 B CN106766219 B CN 106766219B CN 201611153338 A CN201611153338 A CN 201611153338A CN 106766219 B CN106766219 B CN 106766219B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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Abstract
A method, a device and a system for controlling anti-freezing of a heat pump water machine are provided, wherein the method comprises the following steps: acquiring a trigger signal for representing entering anti-freezing operation; judging whether a fault or protection request is received; monitoring a water flow signal for representing water flow information if a fault or protection request is received; and determining whether to enter an anti-freezing operation mode according to the water flow signal. Because the water flow signal represents the water flow information, whether the water flow can meet the requirement of the anti-freezing operation mode can be determined according to the water flow signal, and whether the water flow enters the anti-freezing operation mode can be determined according to the water flow signal, so that the error entering of a fault protection mechanism can be reduced.
Description
Technical field
The present invention relates to heat pump water dispenser technical fields, and in particular to a kind of heat pump water dispenser antifreeze control method, device and is
System.
Background technique
In winter, usually environment temperature can be improved by heat pump water dispenser.When winter temperature is lower than sub-zeroly
Area is in use, heat pump water dispenser system is in standby and (does not cut off the power), and environment temperature and system water temperature are in zero degree or so
When, water system freezes in order to prevent, damages equipment, and control system will carry out automatic freezing-protective operation, and start water pump and compressor, directly
Reach point of safes to water temperature.
In the prior art, when implementing antifreeze operation determination strategy, if detecting that system has protection or failure to deposit
When, then can be run according to protection or the corresponding protection mechanism of failure.However, not reaching water when water system water flow is smaller
When stream switch disconnects flow value, it will lead to system detection and protected to water flow switch, into protection mechanism, to cannot be introduced into automatic
Antifreeze operation；In addition, even if there is water, also cannot be introduced into automatic freezing-protective when there is the protections such as water flow switch protection or failure.When
When protection cannot exclude in time, equipment is easy freezing.
Therefore, how to reduce and enter by mistake through fail-safe mechanisms operation as technical problem urgently to be resolved.
Summary of the invention
Fail-safe mechanisms operation is entered by mistake through the technical problem to be solved in the present invention is that how to reduce.
For this purpose, according in a first aspect, the embodiment of the invention discloses a kind of heat pump water dispenser antifreeze control methods, comprising:
It obtains for characterizing the trigger signal into antifreeze operation；Judge whether to receive failure or protection request；If
Failure or protection request are received, then monitors the water-flow signal for characterizing flow information of water；According to water-flow signal determine whether into
Enter antifreeze operational mode.
Optionally, water-flow signal includes: the cut-off signal for characterizing water flow switch disconnection；It is monitoring for characterizing water flow
Before the water-flow signal of information, further includes: send the enabling signal for starting water pump；Monitor the water for characterizing flow information of water
Flow signal, comprising: monitor the cut-off signal that water flow switch disconnects；Determined whether to enter antifreeze operational mode according to water-flow signal,
Include: whether the duration for judging that water flow switch disconnects is more than preset duration；If the duration that water flow switch disconnects is more than default
It is long, then determined whether to enter antifreeze operational mode according to water temperature information.
Optionally, if the duration that water flow switch disconnects is not above preset duration, enter antifreeze operational mode.
Optionally, determine whether that entering antifreeze operational mode includes: output for characterizing to water heating according to water temperature information
Heating signal；Obtain the changing value of the water temperature of heating front and back；Whether the changing value for judging water temperature is more than default changing value；If
The changing value of water temperature is more than default changing value, then enters antifreeze operational mode.
Optionally, the changing value of water temperature includes: water inlet end water temperature changing value and water outlet water temperature changing value；Judge water temperature
Changing value whether be more than default changing value include: judge water inlet end water temperature changing value whether more than the first default changing value, alternatively,
Judge water outlet water temperature changing value whether more than the second default changing value；If water inlet end water temperature changing value is more than the first default change
Change value then enters antifreeze operational mode alternatively, water outlet water temperature changing value is more than the second default changing value.
Optionally, if water inlet end water temperature changing value is less than the first default changing value, and water outlet water temperature changing value is small
In the second default changing value, then enter water flow switch protected mode.
According to second aspect, the embodiment of the invention discloses a kind of heat pump water dispenser freezing protection control devices, comprising:
Trigger module is used to characterize the trigger signal into antifreeze operation for obtaining；First judgment module, for judging
Whether failure or protection request are received；Module is monitored, for monitoring the water-flow signal for characterizing flow information of water；Determine mould
Block enters antifreeze operational mode for determining whether according to water-flow signal.
Optionally, water-flow signal includes: the cut-off signal for characterizing water flow switch disconnection；Freezing protection control device also wraps
It includes: starting module, for sending the enabling signal for starting water pump；It monitors module and is also used to monitor the disconnected of water flow switch disconnection
ON signal；Determining module includes: second judgment unit, and whether the duration for judging that water flow switch disconnects is more than preset duration；
Antifreeze unit enters antifreeze operational mode for determining whether according to water temperature information.
Optionally, antifreeze unit includes: heating unit, and output is for characterizing the heating signal to water heating；Variation obtains
Unit, the changing value of the water temperature for obtaining heating front and back；Third judging unit, for judge water temperature changing value whether be more than
Default changing value；Into unit, for entering antifreeze operational mode.
According to the third aspect, the embodiment of the invention discloses a kind of heat pump water dispenser antifreeze control systems, comprising:
Signal pickup assembly, for acquiring the water-flow signal for characterizing flow information of water；Temperature sensor, for acquiring water
The temperature value of temperature；Processor, for executing above-mentioned arbitrary heat pump water dispenser antifreeze control method.
Technical solution of the present invention has the advantages that
Heat pump water dispenser antifreeze control method provided in an embodiment of the present invention, apparatus and system, are receiving failure or protection
After request, the water-flow signal for characterizing flow information of water is monitored, is then determined whether to enter antifreeze operation mould according to water-flow signal
Formula, since water-flow signal characterizes flow information of water, can determine that can water flow meet antifreeze operation according to water-flow signal
Mode requirement determines whether to reduce entering by mistake through fail-safe mechanisms operation into antifreeze operational mode according to water-flow signal.
It may indicate that and work as when the duration that water flow switch disconnects is not above preset duration as optional technical solution
Preceding water flow is normal, can satisfy antifreeze service condition, can enter antifreeze operational mode, enters by mistake through failure guarantor so as to reduce
The probability of protection mechanism operational mode.
As optional technical solution, if water inlet end water temperature changing value is more than the first default changing value, alternatively, water outlet
Water temperature changing value is more than the second default changing value, then showing current water inlet end and water outlet at least one end is normal system
Heat meets antifreeze service condition, can enter antifreeze operational mode, enters by mistake through fail-safe mechanisms operation mould so as to reduce
The probability of formula.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of heat pump water dispenser antifreeze control method flow chart in the embodiment of the present invention；
Fig. 2 is another heat pump water dispenser antifreeze control method flow chart in the embodiment of the present invention；
Fig. 3 determines whether to enter antifreeze operational mode flow chart according to water temperature information to be a kind of in the embodiment of the present invention；
Fig. 4 is a kind of heat pump water dispenser freezing protection control device structural block diagram in the embodiment of the present invention；
Fig. 5 is a kind of heat pump water dispenser antifreeze control system schematic diagram in the embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wireless connection, be also possible to wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Enter fail-safe mechanisms operational mode to reduce heat pump water chance error, present embodiment discloses a kind of heat pump water dispensers
Antifreeze control method, referring to FIG. 1, being the heat pump water dispenser antifreeze control method flow chart, the heat pump water dispenser antifreeze control method
Include the following steps:
Step S101 is obtained for characterizing the trigger signal into antifreeze operation.In a particular embodiment, in current environment
After temperature reaches certain condition, heat pump water dispenser can be usually triggered into antifreeze operational mode, in the present embodiment, can pass through ring
Border temperature enters antifreeze operational mode to trigger, and the mode that can also be operated with manual switches enters antifreeze operational mode to trigger.
Step S102 judges whether to receive failure or protection request.In the present embodiment, heat pump water dispenser is being sent out in order to prevent
Raw failure, it will usually detect whether to receive for characterizing the failure or protection request that enter failure or protected mode.It is general and
Speech can enter failure or protected mode, however some small failures have no effect on heat pump after receiving failure or protection request
The operating of water dispenser, therefore, the present embodiment are intended to diagnose fault type, enter by mistake through fail-safe mechanisms operation mould to reduce
Formula.In a particular embodiment, if receiving failure or protection request, S103 is thened follow the steps.
Step S103 monitors the water-flow signal for characterizing flow information of water.In the present embodiment, alleged flow information of water be can wrap
Include the information such as water flow, water temperature.
Step S104 determines whether to enter antifreeze operational mode according to water-flow signal.In general, the pipeline of heat pump water dispenser
In, when water flow is enough or water temperature can change, the condition of antifreeze operation can be met, therefore, can be excluded some non-
Heat pump water dispenser enters failure or protected mode caused by significant trouble.
In a particular embodiment, water-flow signal includes: the cut-off signal for characterizing water flow switch disconnection.Referring to FIG. 2,
Before executing step S103, further includes:
Step S105 sends the enabling signal for starting water pump.In order to detect whether water flow switch influences heat pump water dispenser
Into antifreeze operational mode, in the present embodiment, after receiving failure or protection request, can send to water pump for starting water
The enabling signal of pump, to open water pump.
At this point, monitoring the water-flow signal for characterizing flow information of water when executing step S103, comprising: monitor water flow and open
Turn off the cut-off signal opened.In a particular embodiment, when water flow switch occurs disconnecting failure, corresponding disconnect can be generated and believed
Number, it is possible thereby to listen to the cut-off signal of water flow switch disconnection.It should be noted that in the specific implementation process, water flow is opened
Shutdown is opened and is therefore opened in the signal and water flow switch for listening to water flow switch when opening with water flow switch for different states
When for different signal conditions when, i.e., it is believed that water flow switch is to disconnect.
When executing step S104, determine whether that entering antifreeze operational mode includes: according to water-flow signal
Step S106, whether the duration for judging that water flow switch disconnects is more than preset duration.In a particular embodiment, Ke Yi
It listens to and just starts timing when water flow switch disconnects, in the present embodiment, alleged preset duration can be empirically determined.Specific
In embodiment, if the duration that water flow switch disconnects is less than preset duration, illustrates that water flow is normal, antifreeze operation can be entered
Mode；If the duration that water flow switch disconnects is more than preset duration, S107 is thened follow the steps.It should be noted that specific real
It applies in example, can start to detect whether water flow switch disconnects after starting several durations of water pump, which can also basis
Experience determines to determine, or according to information such as the models of heat pump water dispenser.
Step S107 determines whether to enter antifreeze operational mode according to water temperature information.Judge that water flow is opened in step S106
It turns off after whether the duration opened be more than preset duration, then showing water flow switch, there may be failures, at this time can further basis
Water temperature information is to determine whether will enter antifreeze operational mode.Specifically, referring to FIG. 3, according to water temperature information determine whether into
Entering antifreeze operational mode includes:
Step S301, output is for characterizing the heating signal to water heating.In a particular embodiment, the feelings low in water flow
Under condition, water flow can be heated.It should be noted that in the present embodiment, in output for characterizing to water heating
While heating signal or before, the water temperature value before current water temperature is heated can be acquired.
Step S302 obtains the changing value of the water temperature of heating front and back.In the present embodiment, can after heating a period of time,
It is made the changing value that difference obtains the water temperature of heating front and back with the water temperature value before heating by the water temperature value after acquisition heating.
Step S303 judges whether the changing value of water temperature is more than default changing value.If the changing value of water temperature is more than default
Changing value then shows that water temperature variation acquisition is normal, can enter antifreeze operational mode.
In an alternate embodiment of the invention, the changing value of water temperature includes: water inlet end water temperature changing value and water outlet water temperature changing value.
When whether the changing value for judging water temperature is more than default changing value, may include: judge water inlet end water temperature changing value whether be more than
First default changing value, alternatively, judging water outlet water temperature changing value whether more than the second default changing value；If water inlet end water temperature
Changing value is more than the first default changing value, alternatively, water outlet water temperature changing value is more than the second default changing value, then enters antifreeze fortune
Row mode.It should be noted that in a particular embodiment, both water inlet end water temperature changing value or water outlet water temperature changing value are appointed
One is more than its corresponding default changing value, then shows that water temperature can enter antifreeze operational mode with normal acquisition.
In an alternate embodiment of the invention, if water inlet end water temperature changing value is less than the first default changing value, and water outlet water
For warm changing value less than the second default changing value, then the temperature sensor of the temperature sensor and water outlet that show water inlet end has event
Barrier, can not normal acquisition water temperature, at this point, water flow switch protected mode should be entered.
The present embodiment also discloses a kind of heat pump water dispenser freezing protection control device, referring to FIG. 4, the antifreeze control of heat pump water dispenser
Device includes: trigger module 401, first judgment module 402, monitors module 403 and determining module 404, in which:
Trigger module 401 is used to obtain for characterizing the trigger signal into antifreeze operation；First judgment module 402 is used for
Judge whether to receive failure or protection request；Module 403 is monitored to be used to monitor the water-flow signal for characterizing flow information of water；Really
Cover half block 404 is used to be determined whether according to water-flow signal to enter antifreeze operational mode.
In an alternate embodiment of the invention, water-flow signal includes: the cut-off signal for characterizing water flow switch disconnection；Antifreeze control
Device further include: starting module, for sending the enabling signal for starting water pump；Module is monitored to be also used to monitor water flow switch
The cut-off signal of disconnection；Determining module includes: second judgment unit, and whether the duration for judging that water flow switch disconnects is more than pre-
If duration；Antifreeze unit enters antifreeze operational mode for determining whether according to water temperature information.
In an alternate embodiment of the invention, antifreeze unit includes: heating unit, and output is for characterizing the heating letter to water heating
Number；Change acquiring unit, the changing value of the water temperature for obtaining heating front and back；Third judging unit, for judging the change of water temperature
Whether change value is more than default changing value；Into unit, for entering antifreeze operational mode.
The present embodiment also discloses a kind of heat pump water dispenser antifreeze control system, referring to FIG. 5, the antifreeze control of heat pump water dispenser
System includes:
Signal pickup assembly 1, for acquiring the water-flow signal for characterizing flow information of water.In a particular embodiment, may be used also
To include the valve members such as pump switch 3.
Temperature sensor, for acquiring the temperature value of water temperature.In the present embodiment, temperature sensor includes: water inlet end temperature
Sensor 21 and water outlet temperature sensor 22, for acquiring water inlet end water temperature and water outlet water temperature respectively.In specific embodiment
In, it can also include heater 4, for being heated to water.It should be noted that in a particular embodiment, can also include
Environment temperature sensor 5, for acquiring environment temperature.
Processor (is not shown) in Fig. 5, for executing heat pump water dispenser antifreeze control method disclosed in above-described embodiment.
Heat pump water dispenser antifreeze control method provided in this embodiment, apparatus and system, are receiving failure or protection request
Afterwards, the water-flow signal for characterizing flow information of water is monitored, is then determined whether to enter antifreeze operational mode according to water-flow signal, by
Flow information of water is characterized in water-flow signal, therefore, can determine that can water flow meet antifreeze operational mode according to water-flow signal
Demand determines whether to reduce entering by mistake through fail-safe mechanisms operation into antifreeze operational mode according to water-flow signal.
In an alternate embodiment of the invention, it when the duration that water flow switch disconnects is not above preset duration, may indicate that current
Water flow is normal, can satisfy antifreeze service condition, can enter antifreeze operational mode, enter by mistake through error protection so as to reduce
The probability of mechanism operational mode.
In an alternate embodiment of the invention, if water inlet end water temperature changing value is more than the first default changing value, alternatively, water outlet water
Warm changing value is more than the second default changing value, then showing current water inlet end and water outlet at least one end is normal heating,
Meet antifreeze service condition, antifreeze operational mode can be entered, enter by mistake through fail-safe mechanisms operational mode so as to reduce
Probability.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (6)
1. a kind of heat pump water dispenser antifreeze control method, which comprises the steps of:
It obtains for characterizing the trigger signal into antifreeze operation；
Judge whether to receive failure or protection request；
If receiving failure or protection request, the water-flow signal for characterizing flow information of water is monitored；The water-flow signal packet
It includes: the cut-off signal disconnected for characterizing the water flow switch；
Determined whether to enter antifreeze operational mode according to the water-flow signal；It is described to determine whether to enter according to the water-flow signal
Antifreeze operational mode, comprising: whether the duration for judging that the water flow switch disconnects is more than preset duration；If the water flow switch
The duration of disconnection is more than preset duration, then is determined whether to enter antifreeze operational mode according to water temperature information；
Before water-flow signal of the monitoring for characterizing flow information of water, further includes: send the starting for starting water pump and believe
Number；
The water-flow signal monitored for characterizing flow information of water, comprising: monitor the cut-off signal that the water flow switch disconnects；
It is described to determine whether that entering antifreeze operational mode includes: heating letter of the output for characterizing to water heating according to water temperature information
Number；Obtain the changing value of the water temperature of heating front and back；Whether the changing value for judging the water temperature is more than default changing value；If described
The changing value of water temperature is more than default changing value, then enters antifreeze operational mode.
2. heat pump water dispenser antifreeze control method as described in claim 1, which is characterized in that if what the water flow switch disconnected
Duration is not above preset duration, then enters antifreeze operational mode.
3. heat pump water dispenser antifreeze control method as claimed in claim 1 or 2, which is characterized in that the changing value packet of the water temperature
It includes: water inlet end water temperature changing value and water outlet water temperature changing value；
It includes: to judge that the water inlet end water temperature changing value is that whether the changing value for judging the water temperature, which is more than default changing value,
It is no more than the first default changing value, alternatively, judging the water outlet water temperature changing value whether more than the second default changing value；
If the water inlet end water temperature changing value is more than the first default changing value, alternatively, the water outlet water temperature changing value is more than
Second default changing value then enters antifreeze operational mode.
4. heat pump water dispenser antifreeze control method as claimed in claim 3, which is characterized in that if the water inlet end water temperature changes
Value is less than the first default changing value, and the water outlet water temperature changing value is then opened into water flow less than the second default changing value
Close protected mode.
5. a kind of heat pump water dispenser freezing protection control device characterized by comprising
Trigger module is used to characterize the trigger signal into antifreeze operation for obtaining；
First judgment module receives failure or protection request for judging whether；
Module is monitored, for monitoring the water-flow signal for characterizing flow information of water；The water-flow signal includes: described for characterizing
The cut-off signal that water flow switch disconnects；
Determining module enters antifreeze operational mode for determining whether according to the water-flow signal；The determining module includes:
Two judging units, whether the duration for judging that the water flow switch disconnects is more than preset duration；Antifreeze unit, for according to water
Warm information determines whether to enter antifreeze operational mode；
The freezing protection control device further include: starting module, for sending the enabling signal for starting water pump；
The module of monitoring is also used to monitor the cut-off signal that the water flow switch disconnects；
The antifreeze unit includes: heating unit, and output is for characterizing the heating signal to water heating；Change acquiring unit, uses
In the changing value for the water temperature for obtaining heating front and back；Third judging unit, for judging whether the changing value of the water temperature is more than pre-
If changing value；Into unit, for entering antifreeze operational mode.
6. a kind of heat pump water dispenser antifreeze control system characterized by comprising
Signal pickup assembly, for acquiring the water-flow signal for characterizing flow information of water；
Temperature sensor, for acquiring the temperature value of water temperature；
Processor, for executing the heat pump water dispenser antifreeze control method as described in claim 1-4 any one.
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| CN201611153338.6A CN106766219B (en) | 2016-12-14 | 2016-12-14 | Anti-freezing control method, device and system for heat pump water machine |
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| CN201611153338.6A CN106766219B (en) | 2016-12-14 | 2016-12-14 | Anti-freezing control method, device and system for heat pump water machine |
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| CN109269166B (en) * | 2017-07-18 | 2020-10-02 | 同方人工环境有限公司 | Control method for preventing freezing of heat pump system during shutdown in winter |
| CN109405308B (en) * | 2018-10-29 | 2020-08-07 | 珠海格力电器股份有限公司 | Heat pump water system, anti-freezing control method and device thereof and storage medium |
| CN109506319A (en) * | 2018-11-21 | 2019-03-22 | 珠海格力电器股份有限公司 | heating machine and automatic anti-freezing control method thereof |
| CN110425123B (en) * | 2019-07-22 | 2020-08-21 | 珠海格力电器股份有限公司 | Water pump, unit operation control method and device and water pump system |
| CN110779163B (en) * | 2019-10-21 | 2021-07-09 | 珠海格力电器股份有限公司 | Air conditioning unit control method and device |
| CN113654194B (en) * | 2021-08-12 | 2022-07-22 | 珠海格力电器股份有限公司 | Anti-freezing control device and method for heat pump unit and heat pump unit |
| CN115247891A (en) * | 2022-06-28 | 2022-10-28 | 浙江中广电器集团股份有限公司 | Anti-freezing control method for heat pump water heater |
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