CN113932399A - Anti-freezing control method and device, cold and hot water machine and computer storage medium - Google Patents
Anti-freezing control method and device, cold and hot water machine and computer storage medium Download PDFInfo
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- CN113932399A CN113932399A CN202010671323.9A CN202010671323A CN113932399A CN 113932399 A CN113932399 A CN 113932399A CN 202010671323 A CN202010671323 A CN 202010671323A CN 113932399 A CN113932399 A CN 113932399A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 238000007710 freezing Methods 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000003507 refrigerant Substances 0.000 claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 239000002826 coolant Substances 0.000 claims abstract description 27
- 230000002528 anti-freeze Effects 0.000 claims description 21
- 230000008014 freezing Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 6
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical group CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/04—Preventing the formation of frost or condensate
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an anti-freezing control method, an anti-freezing control device, a cold and hot water machine and a computer storage medium, wherein the anti-freezing control method comprises the following steps: acquiring current component information of a coolant currently applied to a water cooling and heating machine; determining the current safety control parameters of the cold and hot water machine based on a preset corresponding relationship, wherein the preset corresponding relationship is the relationship between the component information of the secondary refrigerant and the safety control parameters of the cold and hot water machine; and performing anti-freezing control on the cold and hot water machine according to the current safety control parameters. Through the mode, the cold and hot water machine adopting the anti-freezing control method can be suitable for various secondary refrigerants.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an anti-freezing control method and device, a cold and hot water machine and a computer storage medium.
Background
The heat operation environment temperature of the heat pump unit is generally-20 to 40 ℃, in the whole heating season used by users, when the heat pump unit is not started, the temperature of secondary refrigerant in a heat exchange tube of the evaporator can be reduced due to the low-temperature environment and the problems of refrigerant migration and the like after shutdown, and if the temperature is too low and frozen, the copper tube of the evaporator can be frozen and cracked, so that huge loss is caused. The antifreeze control of the secondary refrigerant is very important.
The secondary refrigerant of the heat pump unit is usually water, saline solution, glycol solution and the like, but the prior machine type is only suitable for the secondary refrigerant with specific specification (type and concentration).
Disclosure of Invention
The invention mainly solves the technical problem of providing an anti-freezing control method, an anti-freezing control device, a cold and hot water machine and a computer storage medium, which can be suitable for secondary refrigerants of different specifications.
In order to solve the technical problems, the invention adopts a technical scheme that: the anti-freezing control method of the cold and hot water machine comprises the following steps:
acquiring current component information of a coolant currently applied to a water cooling and heating machine;
determining the current safety control parameters of the cold and hot water machine based on a preset corresponding relationship, wherein the preset corresponding relationship is the relationship between the component information of the secondary refrigerant and the safety control parameters of the cold and hot water machine;
and performing anti-freezing control on the cold and hot water machine according to the current safety control parameters.
Further, acquiring the current component information of the coolant currently applied to the water cooling and heating machine includes:
detecting currently applied secondary refrigerant through a detection sensor to obtain current component information; or,
and acquiring the input current component information through the input device.
Further, the anti-freezing control of the cold and hot water machine according to the current safety control parameters comprises:
acquiring current operating parameters of the water cooling and heating machine;
comparing the current operation parameter with the current safety control parameter;
and performing corresponding anti-freezing control according to the comparison result.
Further, the water cooling and heating machine comprises a heat exchanger, a circulating water pump and an anti-freezing electric heater; the current safety control parameter comprises a current safety control temperature; acquiring current operating parameters of the water cooling and heating machine; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, wherein the anti-freezing control comprises the following steps:
acquiring the current temperature of the currently applied secondary refrigerant in the heat exchanger;
comparing the difference between the current temperature and the first temperature value, and controlling to start the circulating water pump;
comparing the current temperature with the difference between the current safety control temperature and the second temperature value, and controlling to start the anti-freezing electric heater;
the first temperature value is smaller than the second temperature value, and the difference between the current safety control temperature and the second temperature value is larger than or equal to the freezing temperature of the currently applied secondary refrigerant.
Further, acquiring current operating parameters of the cold and hot water machine; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, and further comprising:
comparing the difference between the current temperature and the third temperature, and controlling the cold and hot water machine to start a heating mode;
and the difference between the current safety control temperature and the third temperature value is greater than or equal to the freezing temperature of the currently applied secondary refrigerant.
Further, the water cooling and heating machine comprises a heat exchanger and a compressor, and the water cooling and heating machine is connected with the indoor machine; the current safety control parameter comprises current safety control air pressure; acquiring current operating parameters of the water cooling and heating machine; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, wherein the anti-freezing control comprises the following steps:
acquiring the current air pressure of a refrigerant in a heat exchanger;
comparing the current air pressure which is smaller than the current safety control air pressure and larger than the difference between the current safety control air pressure and the first air pressure value, and reducing the frequency of the compressor and/or the fan gear of the indoor unit;
the difference between the current safety control air pressure and the first air pressure value is greater than or equal to the air pressure threshold of the refrigerant, and the air pressure threshold corresponds to the freezing temperature of the currently applied secondary refrigerant.
Further, acquiring current operating parameters of the cold and hot water machine; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, and further comprising:
comparing the current air pressure smaller than the current safety control air pressure with the first air pressure value, and controlling the cold and hot water machine to stop.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is an anti-freezing control device of a cold and hot water machine, the anti-freezing control device comprising: a processor and a memory coupled to each other, the processor being configured to execute program instructions stored in the memory to implement any of the above-described antifreeze control methods.
In order to solve the technical problems, the invention adopts a technical scheme that: the cold and hot water machine comprises the anti-freezing control device.
In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a computer storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing the anti-freeze control method of any of the above.
The invention has the beneficial effects that: different from the prior art, the method and the device firstly acquire the current component information of the currently applied secondary refrigerant, determine the current safety control parameters of the cold and hot water machine based on the preset corresponding relation, and then perform anti-freezing control on the cold and hot water machine according to the current safety control parameters. The cold and hot water machine adopting the anti-freezing control method can be suitable for various secondary refrigerants.
Drawings
Fig. 1 is a schematic flow chart of an anti-freezing control method of a cold and hot water machine according to an embodiment of the present application;
fig. 2 is a schematic flow chart illustrating an anti-freezing control method for a cold and hot water machine according to another embodiment of the present application;
fig. 3 is a schematic flow chart illustrating an anti-freezing control method of a cold and hot water machine according to still another embodiment of the present application;
fig. 4 is a schematic flow chart illustrating an anti-freezing control method of a cold and hot water machine according to still another embodiment of the present application;
fig. 5 is a schematic diagram of a frame of an anti-freezing control device of a cold and hot water machine according to an embodiment of the present application;
fig. 6 is a schematic structural view illustrating a connection state between a water cooling and heating machine and an indoor unit according to an embodiment of the present application;
FIG. 7 is a block diagram of a computer storage medium according to one embodiment of the present application.
In the figure, the position of the upper end of the main shaft,
500. the anti-freezing control device comprises an anti-freezing control device, 501, a processor, 502 and a memory;
600. the system comprises a water cooling and heating machine 601, a heat exchanger 602, a compressor 603, a condenser 604, a throttling structure 605, an indoor unit 605, a circulating water pump 606, a temperature sensor 607, a pressure sensor 608, an anti-freezing electric heater 609;
700. computer storage medium, 701 computer program.
Detailed Description
In order to make the purpose, technical solution and effect of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present application.
The terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing 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. Further, the term "plurality" herein means two or more than two.
Fig. 1 is a schematic flow chart of an anti-freezing control method of a cold and hot water machine according to an embodiment of the present application.
The cold and hot water machine comprises a heat exchanger, wherein the heat exchanger is provided with a refrigerant channel and a secondary refrigerant channel, the refrigerant channel of the heat exchanger is respectively connected with a compressor, a condenser and a throttling structure to form a refrigerant circulating channel, the secondary refrigerant channel is communicated with an indoor unit to form a secondary refrigerant circulating channel, and the refrigerant and the secondary refrigerant exchange heat at the heat exchanger.
Referring to fig. 1, an anti-freezing control method for a cold and hot water machine according to an embodiment of the present application includes:
step S101: and acquiring the current component information of the coolant currently applied to the water cooling and heating machine.
Step S102: and determining the current safety control parameters of the cold and hot water machine based on the preset corresponding relation, wherein the preset corresponding relation is the relation between the component information of the secondary refrigerant and the safety control parameters of the cold and hot water machine.
Step S103: and performing anti-freezing control on the cold and hot water machine according to the current safety control parameters.
In this embodiment, the current component information of the currently applied coolant is obtained, the current safety control parameter of the water chiller/heater is determined based on the preset corresponding relationship, and then the water chiller/heater is subjected to anti-freezing control according to the current safety control parameter. The cold and hot water machine adopting the anti-freezing control method of the embodiment can be suitable for various secondary refrigerants.
In the antifreeze control method of a water chiller-heater according to another embodiment of the present application, step S101, obtaining current component information of a coolant currently applied to the water chiller-heater includes: and detecting the currently applied coolant by a detection sensor to acquire the current composition information, or acquiring the input current composition information by an input device.
Specifically, the coolant composition information may include coolant concentration information and solute information.
In the method for acquiring the current component information by detecting the currently applied secondary refrigerant through the detection sensor, the detection sensor can detect and feed back in real time or can detect and feed back after receiving a related instruction. The former method is suitable for not only the case where the secondary refrigerant is replaced, but also daily monitoring. The antifreeze control can be more accurately performed by changing the composition information, such as concentration, of the coolant during long-term use. The latter mode can be more targeted, and the loss of the detection sensor is avoided.
The input equipment is used for acquiring the input current component information, so that the configuration of a detection sensor can be avoided, and the cost is reduced. For example, if the solute information of the coolant is detected by the detection sensor, the cost is high. In general, solute information is clear when the coolant is replaced, and input of the solute information through the input device is easy.
In addition, the current component information can be obtained through the input device as well as the detection of the currently applied secondary refrigerant by the detection sensor. In one aspect, different current composition information may be acquired by the detection sensor and the input device, respectively. For example, the concentration information of the coolant can be detected by a detection sensor, and the solute information can be acquired by an input device. On the other hand, error correction can also be performed. For example, when it is obvious that the current component information detected by the detection sensor is erroneous, the corrected current component information is acquired through the input device.
Fig. 2 is a schematic flow chart of an anti-freezing control method of a cold and hot water machine according to another embodiment of the present application.
Referring to fig. 2, in an anti-freezing control method for a water chiller-heater according to another embodiment of the present application, the anti-freezing control of the water chiller-heater according to the current safety control parameter includes:
step S201: and acquiring the current operating parameters of the water cooling and heating machine.
Step S202: and comparing the current operation parameters with the current safety control parameters.
Step S203: and performing corresponding anti-freezing control according to the comparison result.
Specifically, the current safety control parameter may be a current safety control temperature or a current safety control air pressure. When the current safety control parameter of the water cooling and heating machine is the current safety control temperature, correspondingly, the current operation parameter is the current temperature of the secondary refrigerant currently applied in the heat exchanger; when the current safety control parameter of the water cooling and heating machine is the current safety control air pressure, correspondingly, the current operation parameter is the current air pressure of the refrigerant in the heat exchanger.
The following table shows the relationship between the composition information of the secondary refrigerant and the current safety control parameters of the cold and hot water machine:
for example, when the solute of the currently used coolant is propylene glycol and the concentration is 35%, the safety control temperature of the water cooling and heating machine is-10 ℃, and the safety control air pressure is 0.38 MPa.
And performing corresponding anti-freezing control according to the comparison result by comparing the current operating parameter with the current safety control parameter.
Specifically, the anti-freezing control can be performed by the current safety control temperature, and the anti-freezing control can also be performed by the current safety control air pressure. See in particular the examples below.
Fig. 3 is a schematic flow chart of an anti-freezing control method of a cold and hot water machine according to still another embodiment of the present application.
Referring to fig. 3, a freeze protection control method for a water cooling and heating machine according to another embodiment of the present application may be applied to the water cooling and heating machine in a non-operating state. The temperature range of the hot operation environment of the air-cooled heat pump unit is generally-20-40 ℃, when the unit is not started in the whole heating season used by a user, the temperature of the secondary refrigerant in the heat exchanger is reduced due to the low-temperature environment, the refrigerant migration after shutdown and other problems, and the heat exchanger is damaged if the secondary refrigerant is frozen due to too low temperature.
In the anti-freezing control method of the embodiment, the hot and cold water machine comprises a heat exchanger, a circulating water pump and an anti-freezing electric heater; the current safety control parameter includes a current safety control temperature.
In steps S201 to S203 of the above embodiment, the current operation parameters of the water cooling and heating machine are obtained; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, wherein the anti-freezing control comprises the following steps:
step S301: and acquiring the current temperature of the currently applied secondary refrigerant in the heat exchanger.
Specifically, the current temperature may be the temperature of the water inlet area of the heat exchanger, the temperature of the water outlet area of the heat exchanger, the temperature of the middle area of the heat exchanger, or the average temperature measured at multiple points in the heat exchanger.
Step S302: and comparing the current temperature with the difference between the current safety control temperature and the first temperature value, and controlling to start the circulating water pump.
The circulating water pump is used for driving the coolant to circularly flow in the circulating channel, and the installation position of the circulating water pump is not limited. The heat exchanger is arranged outdoors and is influenced by the ambient temperature, and the temperature of the secondary refrigerant inside the heat exchanger is lower than that of the secondary refrigerant in other places. After the circulating water pump is started, the secondary refrigerants flow in the secondary refrigerant circulating channel and are mixed with each other, so that the temperature of the secondary refrigerants at the position of the heat exchanger can be increased. At the same time, the flowing coolant is less likely to freeze than it would be in a quiescent state.
Step S303: and comparing the current temperature with a difference between the current safety control temperature and a second temperature value, and controlling to start the anti-freezing electric heater, wherein the first temperature value is less than the second temperature value, and the difference between the current safety control temperature and the second temperature value is more than or equal to the freezing temperature of the currently applied secondary refrigerant.
When the difference between the current temperature and the current safety control temperature is smaller than or equal to the difference between the current safety control temperature and the second temperature value, the first temperature value is smaller than the second temperature value, and the difference between the current safety control temperature and the second temperature value is larger than or equal to the freezing temperature of the currently applied secondary refrigerant, the secondary refrigerant cannot be effectively prevented from freezing by starting the circulating water pump, and a further anti-freezing means, namely, an anti-freezing electric heater is started to heat the secondary refrigerant through the anti-freezing electric heater, wherein the anti-freezing electric heater can be coated on a shell of the heat exchanger.
Step S304: and comparing the current temperature with a difference between the current safety control temperature and a third temperature value, and controlling the cold and hot water machine to start a heating mode, wherein the second temperature value is less than the third temperature value, and the difference between the current safety control temperature and the third temperature value is greater than or equal to the freezing temperature of the currently applied secondary refrigerant.
In some cases, the coolant cannot be effectively prevented from freezing by turning on the anti-freezing electric heater, and a further anti-freezing means, i.e., controlling the water heater and cooler to turn on the heating mode, is required to raise the temperature of the coolant more quickly to prevent it from freezing.
Fig. 4 is a schematic flow chart illustrating an anti-freezing control method for a cold and hot water machine according to still another embodiment of the present application.
Referring to fig. 4, a freeze protection control method for a water chiller-heater according to another embodiment of the present application can be applied to a cooling mode of the water chiller-heater.
The air pressure and the temperature of the refrigerant in the heat exchanger correspond to each other one by one, and the temperature of the refrigerant directly influences the temperature of the secondary refrigerant. Therefore, the refrigerating medium can be prevented from freezing only by controlling the air pressure of the refrigerating medium in the heat exchanger.
In the embodiment, the water cooling and heating machine comprises a heat exchanger and a compressor, and the water cooling and heating machine is connected with the indoor unit; the current safety control parameter includes a current safety control air pressure.
In steps S201 to S203 of the above embodiment, the current operation parameters of the water cooling and heating machine are obtained; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, wherein the anti-freezing control comprises the following steps:
step S401: and acquiring the current air pressure of the refrigerant in the heat exchanger.
Specifically, the current air pressure can be obtained by detecting through a pressure sensor arranged in a refrigerant channel of the heat exchanger.
Step S402: and comparing the current air pressure which is smaller than the current safety control air pressure and larger than the difference between the current safety control air pressure and the first air pressure value, reducing the frequency of the compressor and/or the fan gear of the indoor unit, wherein the difference between the current safety control air pressure and the first air pressure value is larger than or equal to the air pressure threshold of the refrigerant, and the air pressure threshold corresponds to the freezing temperature of the currently applied secondary refrigerant.
Specifically, the reduction of the frequency of the compressor and the reduction of the fan gear of the indoor unit are means for increasing the current air pressure of the refrigerant in the heat exchanger, and the two methods can be applied independently or in combination.
Step S403: comparing the current air pressure smaller than the current safety control air pressure with the first air pressure value, and controlling the cold and hot water machine to stop.
Specifically, when the current air pressure is smaller than the difference between the current safety control air pressure and the first air pressure value, the secondary refrigerant risks freezing, and the cold and hot water machine is controlled to stop.
Fig. 5 is a schematic diagram of a framework of an anti-freezing control device of a water cooling and heating machine according to an embodiment of the present application.
Referring to fig. 5, an anti-freezing control device 500 of a water cooling and heating machine according to an embodiment of the present application includes a processor 501 and a memory 502 coupled to each other, where the processor 501 is configured to execute program instructions stored in the memory 502 to implement an anti-freezing control method according to any of the embodiments described above. The antifreeze control apparatus 500 includes all the technical features of the antifreeze control method according to any of the above embodiments, and therefore, also includes the advantageous effects of the antifreeze control method according to any of the above embodiments.
Fig. 6 is a schematic structural view illustrating a connection state between a water cooling and heating machine and an indoor unit according to an embodiment of the present application.
Referring to fig. 6, a water cooling and heating machine 600 according to an embodiment of the present application includes the anti-freezing control device 500. The water cooling and heating machine 600 includes all the technical features of the anti-freezing control device 500 in any of the above embodiments, and therefore, also includes the beneficial effects of the anti-freezing control device 500 in any of the above embodiments.
In an embodiment, the water cooling and heating machine 600 further includes a heat exchanger 601, the heat exchanger 601 is provided with a refrigerant channel and a coolant channel, the refrigerant channel of the heat exchanger 601 is respectively connected with the compressor 602, the condenser 603 and the throttling structure 604 to form a refrigerant circulation channel, the coolant channel of the heat exchanger 601 is communicated with the indoor unit 605 to form a coolant circulation channel, and the refrigerant and the coolant exchange heat at the heat exchanger 601. Wherein, the compressor 602 is in control connection with the anti-freeze control device 500.
The water cooling and heating machine 600 further includes a circulating water pump 606 disposed on the coolant circulation passage, and in control connection with the anti-freezing control device 500, for driving coolant circulation.
The water cooling and heating machine 600 further includes a temperature sensor 607 disposed on the coolant circulation channel, and is in control connection with the anti-freezing control device 500, for obtaining the temperature of the coolant. Specifically, the temperature sensor 607 may be disposed in a water inlet region of the heat exchanger 601, a water outlet region of the heat exchanger 601, or an intermediate region of the heat exchanger 601.
The water cooling and heating machine 600 further includes a pressure sensor 608 disposed on the refrigerant circulation channel and located in the heat exchanger 601, and connected to the anti-freezing control device 500 for obtaining the air pressure of the refrigerant in the heat exchanger 601.
The water cooling and heating machine 600 further comprises an anti-freezing electric heater 609 which can be arranged on the shell of the heat exchanger 601, is in control connection with the anti-freezing control device 500 and is used for heating the refrigerant.
FIG. 7 is a block diagram of a computer storage medium according to one embodiment of the present application.
Referring to fig. 7, a computer storage medium 700 according to an embodiment of the present application stores a computer program 701, and when the computer program 701 is executed by a processor, the antifreeze control method according to any of the above embodiments is implemented.
The storage device 700 may be a medium that can store program instructions, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, or may be a server that stores the program instructions, and the server may send the stored program instructions to other devices for operation, or may self-operate the stored program instructions.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a module or a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
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 units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (10)
1. An anti-freezing control method of a cold and hot water machine is characterized by comprising the following steps:
acquiring current component information of a secondary refrigerant currently applied in the cold and hot water machine;
determining the current safety control parameters of the cold and hot water machine based on a preset corresponding relationship, wherein the preset corresponding relationship is the relationship between the composition information of the secondary refrigerant and the safety control parameters of the cold and hot water machine;
and performing anti-freezing control on the cold and hot water machine according to the current safety control parameter.
2. The antifreeze control method according to claim 1, wherein the acquiring current composition information of the coolant currently applied to the water chiller-heater includes:
detecting the currently applied secondary refrigerant through a detection sensor to obtain the current component information; or,
acquiring the current component information input through an input device.
3. The antifreeze control method according to claim 1, wherein the antifreeze control of the hot and cold water machine according to the current safety control parameter includes:
acquiring current operating parameters of the water cooling and heating machine;
comparing the current operation parameter with the current safety control parameter;
and performing corresponding anti-freezing control according to the comparison result.
4. The antifreeze control method according to claim 3, wherein the hot and cold water machine includes a heat exchanger, a circulating water pump, and an antifreeze electric heater; the current safety control parameter comprises a current safety control temperature; acquiring current operating parameters of the cold and hot water machine; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, wherein the anti-freezing control comprises the following steps:
acquiring the current temperature of the currently applied secondary refrigerant in the heat exchanger;
comparing the current temperature with the difference between the current safety control temperature and a first temperature value, and controlling to start the circulating water pump;
comparing the current temperature with the difference between the current safety control temperature and a second temperature value, and controlling to start the anti-freezing electric heater;
and the difference between the current safety control temperature and the second temperature value is greater than or equal to the freezing temperature of the currently applied secondary refrigerant.
5. The antifreeze control method according to claim 4, wherein said obtaining current operating parameters of the water chiller/heater; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, and further comprising:
comparing the difference between the current temperature and the current safety control temperature to control the water cooling and heating machine to start a heating mode;
and the difference between the current safety control temperature and the third temperature value is greater than or equal to the freezing temperature of the currently applied secondary refrigerant.
6. The antifreeze control method according to claim 3, wherein the water cooling and heating machine comprises a heat exchanger and a compressor, and the water cooling and heating machine is connected to the indoor unit; the current safety control parameter comprises current safety control air pressure; acquiring current operating parameters of the cold and hot water machine; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, wherein the anti-freezing control comprises the following steps:
acquiring the current air pressure of a refrigerant in the heat exchanger;
comparing the current air pressure which is smaller than the current safety control air pressure and larger than the difference between the current safety control air pressure and the first air pressure value, and reducing the frequency of a compressor and/or the fan gear of an indoor unit;
and the difference between the current safety control air pressure and the first air pressure value is greater than or equal to the air pressure threshold of the refrigerant, and the air pressure threshold corresponds to the freezing temperature of the currently applied secondary refrigerant.
7. The antifreeze control method according to claim 6, wherein said obtaining current operating parameters of the water chiller-heater; comparing the current operation parameter with the current safety control parameter; and performing corresponding anti-freezing control according to the comparison result, and further comprising:
and comparing the current air pressure smaller than the difference between the current safety control air pressure and the first air pressure value, and controlling the cold and hot water machine to stop.
8. An anti-freezing control device of a cold and hot water machine, characterized in that the anti-freezing control device comprises: a processor and a memory coupled to each other, the processor being configured to execute program instructions stored in the memory to implement the anti-freeze control method of any of claims 1-7.
9. A water cooling and heating machine characterized by comprising the antifreeze control apparatus as set forth in claim 8.
10. A computer storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed by a processor, implements the antifreeze control method according to any one of claims 1 to 7.
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