CN111520797A - Floor heating multi-split air conditioner with anti-freezing monitoring function and anti-freezing control method thereof - Google Patents
Floor heating multi-split air conditioner with anti-freezing monitoring function and anti-freezing control method thereof Download PDFInfo
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- CN111520797A CN111520797A CN202010451099.2A CN202010451099A CN111520797A CN 111520797 A CN111520797 A CN 111520797A CN 202010451099 A CN202010451099 A CN 202010451099A CN 111520797 A CN111520797 A CN 111520797A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 91
- 238000007710 freezing Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000003507 refrigerant Substances 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 38
- 230000002528 anti-freeze Effects 0.000 claims description 10
- 208000001034 Frostbite Diseases 0.000 claims 1
- 238000009529 body temperature measurement Methods 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- 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]
- Y02B30/12—Hot water central heating systems using heat pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a floor heating multi-split air conditioner with anti-freezing monitoring and an anti-freezing control method thereof, and the floor heating multi-split air conditioner further comprises an environment temperature unit which is arranged at an outdoor heat exchanger and used for detecting and acquiring an environment temperature value, an indoor unit temperature unit which is arranged at an indoor unit and used for detecting and acquiring an indoor unit temperature value, a first temperature unit which is arranged on a water flow path of a hydraulic heat exchanger and used for detecting and acquiring a water temperature value, and a second temperature unit which is arranged on a refrigerant flow path outlet of the hydraulic heat exchanger and used for detecting and acquiring a liquid pipe temperature; the floor heating multi-connected unit comprises a floor heating mode and a non-floor heating mode, linkage anti-freezing protection among the indoor unit, the outdoor unit and the hydraulic module is effectively improved, reliability of the floor heating multi-connected unit in the using process is improved, the root cause of frost cracking of the heat exchanger is solved from the whole system, and risks of liquid return and frost cracking are greatly reduced.
Description
Technical Field
The invention relates to the technical field of floor heating multi-split air conditioners, in particular to a floor heating multi-split air conditioner with anti-freezing monitoring and an anti-freezing control method thereof.
Background
In the existing floor heating multi-split air-conditioning combined supply system, a multi-split air-conditioning system and a water machine system with a hydraulic module are provided, in order to ensure the normal switching operation of the floor heating multi-split air-conditioning system, effective anti-freezing protection needs to be carried out on the machine set system which does not work under the low-temperature environment, and in the existing anti-freezing measure mode, the water machine system only depends on the detection of the temperature of the hydraulic module, does not relate to the detection of a host machine, and addresses the symptoms and the root causes; for the multi-split system, the detection of the main machine is not involved by detecting the temperature of the indoor unit, so that the effect of treating the symptoms is not the primary cause. The anti-freezing measures of the multi-split air conditioning system and the water machine system are independently controlled, and the outdoor unit is not involved, so that overall anti-freezing protection is lacked.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a floor heating multi-split air conditioner with anti-freezing monitoring and an anti-freezing control method thereof.
In order to achieve the purpose, the floor heating multi-split unit with anti-freezing monitoring function comprises an indoor unit, an outdoor unit and a floor heating module, wherein the outdoor unit comprises a compressor, an outdoor heat exchanger, a first four-way valve and a second four-way valve; the indoor unit is connected with the outdoor heat exchanger through an expansion valve and a first electromagnetic valve; the other end of a refrigerant flow path of the hydraulic heat exchanger is connected between the first electromagnetic valve and the outdoor heat exchanger through a first one-way valve in a bypass mode, the two ends of a water flow path of the hydraulic heat exchanger are connected with the floor heating coil through a water inlet pipe and a water outlet pipe respectively, an electric auxiliary heating unit is arranged on the water outlet pipe, and a circulating water pump is arranged on the water inlet pipe; the system also comprises an ambient temperature unit which is arranged at the outdoor heat exchanger and used for detecting and acquiring an ambient temperature value, an indoor unit temperature unit which is arranged at the indoor unit and used for detecting and acquiring an indoor unit temperature value, a first temperature unit which is arranged on a water flow path of the hydraulic heat exchanger and used for detecting and acquiring a water temperature value, and a second temperature unit which is arranged on a refrigerant flow path outlet of the hydraulic heat exchanger and used for detecting and acquiring a liquid pipe temperature value.
Furthermore, the first temperature unit is composed of water temperature sensors respectively arranged at the water inlet position and the water outlet position of the water flow path of the hydraulic heat exchanger, and the water outlet temperature and the water inlet temperature of the hydraulic heat exchanger are respectively detected and obtained through the two water temperature sensors.
Furthermore, the indoor unit comprises at least two indoor heat exchangers arranged in parallel, wherein each indoor heat exchanger is provided with an indoor unit temperature unit, each indoor unit temperature unit consists of a middle temperature sensor arranged in the middle of the indoor heat exchanger and an outlet temperature sensor arranged at the outlet of the indoor heat exchanger, and the middle temperature and the outlet temperature of the indoor heat exchanger are respectively detected and obtained through the middle temperature sensor and the outlet temperature sensor.
An anti-freezing control method of a floor heating multi-split air conditioner with anti-freezing monitoring function comprises a floor heating mode and a non-floor heating mode, wherein,
under the floor heating mode, the first four-way valve and the second four-way valve are powered off and the first electromagnetic valve is closed, during the operation period, the temperature unit of the indoor unit detects and acquires the temperature value of the indoor unit in real time, and if the temperature value of the indoor unit is detected to be lower than 0 ℃, indoor anti-freezing detection protection is started.
In a non-floor heating mode, the first four-way valve and the second four-way valve are powered on and the first electromagnetic valve is started, during the operation period, the environment temperature unit detects and acquires an environment temperature value in real time and the second temperature unit detects and acquires a liquid pipe temperature value in real time, wherein when the temperature difference value between the detected environment temperature value and the liquid pipe temperature value is larger than or equal to a preset first temperature difference and the liquid pipe temperature value is lower than the rated liquid pipe temperature, floor heating anti-freezing detection protection is started; and when the temperature difference value between the detected environment temperature value and the liquid pipe temperature value is smaller than a preset first temperature difference, starting water conservancy anti-freezing detection protection.
Further, when the indoor anti-freezing detection protection is started, firstly closing the expansion valve, and then detecting the temperature value of the indoor unit by the indoor unit temperature unit again, wherein if the temperature value of the indoor unit is detected to be increased and higher than 0 ℃, a fault of the first electromagnetic valve is reported; and if the temperature value of the internal machine is detected to be continuously lower than 0 ℃, reporting faults of the first electromagnetic valve and the expansion valve.
Further, when floor heating anti-freezing detection protection is started, the outdoor unit is shut down.
Further, when water conservancy anti-freezing detection protection is started, the environment temperature unit detects in real time to obtain an environment temperature value and the first temperature unit detects in real time to obtain a water temperature value, wherein when the environment temperature value is detected to be lower than the rated environment temperature and the water temperature value is not higher than the rated water temperature, the circulating water pump is started to run for a rated time, and then the first temperature unit detects for the second time to obtain the water temperature value.
Further, if the water temperature value detected for the second time is still not higher than the rated water temperature, the electric auxiliary heating unit is started to heat for the rated time, and then the first temperature unit detects for the third time to obtain the water temperature value; and otherwise, if the water temperature value detected for the second time is still higher than the rated water temperature, the circulating water pump is closed and the water conservancy anti-freezing detection protection is quitted.
And further, if the water temperature value detected for the third time is higher than the rated water temperature, delaying the rated time, closing the circulating water pump and the electric auxiliary heat module, and exiting the water conservancy anti-freezing detection protection.
And further, if the water temperature value detected for the third time is still not higher than the rated water temperature, the floor heating multi-split air conditioner is switched to a floor heating mode, the outdoor unit forcibly heats the water conservancy heat exchanger, and the water conservancy anti-freezing detection protection is quitted and the floor heating mode is switched to a non-floor heating mode for normal operation until the water temperature value detected in real time is higher than the rated protection temperature.
The invention adopts the scheme, and has the beneficial effects that: the floor heating anti-freezing protection device is arranged in a floor heating mode, and the indoor anti-freezing detection protection and the water conservancy anti-freezing detection protection are arranged in a non-floor heating mode, so that the linkage anti-freezing protection among an indoor unit, an outdoor unit and a hydraulic module is effectively improved, the reliability of the multi-connected floor heating and in the using process is improved, the root cause of the occurrence of frost cracking of the heat exchanger is integrally solved from the system, and the risks of liquid return and frost cracking are greatly reduced.
Drawings
Fig. 1 is a schematic view of the connection composition of the floor heating multi-split air conditioner.
FIG. 2 is a schematic flow chart of the antifreeze control method of the present invention.
The system comprises 100-indoor units, 110-indoor heat exchangers, 120-first electromagnetic valves, 130-expansion valves, 140-indoor unit temperature units, 141-middle temperature sensors, 142-outlet temperature sensors, 200-outdoor units, 210-compressors, 220-outdoor heat exchangers, 221-environment temperature units, 230-first four-way valves, 240-second four-way valves, 250-one-way valves, 300-floor heating modules, 310-hydraulic heat exchangers, 311-second temperature units, 320-floor heating coils, 330-circulating water pumps, 340-electric auxiliary heating units and 350-first temperature units.
Detailed Description
To facilitate an understanding of the invention, the invention is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, the floor heating multi-split air conditioner with anti-freezing detection according to the embodiment includes an indoor unit 100, an outdoor unit 200 and a floor heating module 300, wherein the outdoor unit 200 includes a compressor 210, an outdoor heat exchanger 220, a first four-way valve 230 and a second four-way valve 240; the floor heating module 300 includes a hydro heat exchanger 310 and a floor heating coil 320.
In this embodiment, the interfaces d, e, c, and s of the first four-way valve 230 are respectively connected to the output end of the compressor 210, the g port of the indoor unit 100, the g port of the second four-way valve 240, and the air return end of the compressor 210, the interfaces h, i, and f of the second four-way valve 240 are respectively connected to the outdoor heat exchanger 220, the air return end of the compressor 210, and one end of the refrigerant flow path of the hydro heat exchanger 310, and the indoor unit 100 is connected to the outdoor heat exchanger 220 through the expansion valve 130 and the first solenoid valve 120; the other end of the refrigerant flow path of the hydraulic heat exchanger 310 is connected between the first solenoid valve 120 and the outdoor heat exchanger 220 through a first check valve 250 in a bypassing manner, two ends of the water flow path of the hydraulic heat exchanger 310 are respectively connected with the floor heating coil 320 through a water inlet pipe and a water outlet pipe, wherein the water outlet pipe is provided with an electric auxiliary heating unit 340, and the water inlet pipe is provided with a circulating water pump 330.
Further, the indoor unit 100 of the present embodiment is composed of at least two indoor heat exchangers 110 connected in parallel, that is, each indoor heat exchanger 110 is configured with an expansion valve 130, and then the expansion valves meet at the first electromagnetic valve 120 through the branch pipe.
In this embodiment, the system further includes an ambient temperature unit 221 disposed at the outdoor heat exchanger 220 and configured to detect and obtain an ambient temperature value, an indoor unit temperature unit 140 disposed at the indoor unit 100 and configured to detect and obtain an indoor unit temperature value, a first temperature unit 350 disposed on a water flow path of the hydraulic heat exchanger 310 and configured to detect and obtain a water temperature value, and a second temperature unit 311 disposed on a refrigerant flow path outlet of the hydraulic heat exchanger 310 and configured to detect and obtain a liquid pipe temperature value, where the second temperature unit 311 in this embodiment is disposed between the refrigerant flow path and a pipeline of the check valve 250.
Further, the first temperature unit 350 of the present embodiment is composed of water temperature sensors respectively disposed at the water inlet position and the water outlet position of the water flow path of the hydraulic heat exchanger 310, and the water outlet temperature and the water inlet temperature detected by the two water temperature sensors constitute a water temperature value, so that when any one of the water outlet temperature or the water inlet temperature reaches a predetermined temperature judgment requirement, the water temperature value is determined to reach the corresponding temperature judgment requirement, thereby improving the sensitivity and accuracy of the temperature detection judgment.
Further, each indoor heat exchanger 110 of the present embodiment is configured with one indoor unit temperature unit 140, and the indoor unit temperature unit 140 of the present embodiment is composed of a middle temperature sensor 141 disposed at the middle position of the indoor heat exchanger 110 and an outlet temperature sensor 142 disposed at the outlet of the indoor heat exchanger 110, and the detected middle temperature and outlet temperature constitute an indoor unit temperature value (T11), so that when any one of the middle temperature or the inlet water temperature reaches the temperature judgment requirement of voice, it is determined that the indoor unit temperature unit 140 reaches the corresponding temperature judgment requirement, thereby improving the sensitivity and accuracy of temperature detection judgment.
For the convenience of understanding, further explanation is made in combination with the above-mentioned anti-freezing control method of the floor heating multi-split air conditioner.
Referring to fig. 2, the floor heating multi-split air conditioner of the embodiment includes a floor heating mode and a non-floor heating mode, and can be switched between the floor heating mode and the non-floor heating mode.
In the floor heating mode, the first four-way valve 230 and the second four-way valve 240 lose power and close the first solenoid valve 120 (the d and c interfaces, the e and s interfaces of the first four-way valve 230 are communicated, and the second four-way valve 240g and f interfaces, and the h and i interfaces are communicated), and the refrigerant flow path at this time is: high-temperature and high-pressure refrigerant sent by the compressor 210 flows into the hydraulic heat exchanger 310 for heat release (used for heating a water flow path of the hydraulic heat exchanger 310) through the d-c interface of the first four-way valve 230 and the g-f interface of the second four-way valve 240, heated hot water is conveyed to the floor heating coil 320 from a water outlet pipe, then the refrigerant after heat release flows into the outdoor heat exchanger 220 for heat absorption through the one-way valve 250, and the refrigerant after heat absorption flows back to the compressor 210 through the e-s interface of the second four-way valve 240.
During the operation, the indoor unit temperature unit 140 detects and acquires an indoor unit temperature value (T11) in real time, and if the indoor unit temperature value is detected to be lower than 0 ℃ (T11 < 0 ℃), indoor anti-freezing detection protection is started. When the indoor anti-freezing detection protection is started, firstly closing the expansion valve 130, and then detecting the indoor unit temperature value (T12) by the indoor unit temperature unit 140 again, wherein if the indoor unit temperature value is detected to be increased and higher than 0 ℃ (T12 is more than 0 ℃), the first electromagnetic valve 120 is proved to be incapable of being normally closed due to a fault, and the first electromagnetic valve 120 is reported to be in fault, so that a user is reminded and warned; if the temperature value of the internal machine is detected to be continuously lower than 0 ℃ (T12 is less than or equal to 0 ℃), the first electromagnetic valve 120 and the expansion valve 130 can not be normally closed, and faults of the first electromagnetic valve 120 and the expansion valve 130 are reported to remind and warn users.
Further, in order to timely respond that the indoor anti-freezing detection protection is started, as long as the temperature value detected by the middle temperature sensor 141 or the outlet temperature sensor 142 of any indoor unit 100 is lower than 0 ℃, the judgment condition that the temperature value of the indoor unit is lower than 0 ℃ (T11 is less than 0 ℃) is determined to be met.
In the non-floor heating mode, the first four-way valve 230 and the second four-way valve 240 are powered on and the first solenoid valve 120 is activated (the d-e interface and the c-s interface of the first four-way valve 230 are communicated, and the g-h interface and the f-i interface of the second four-way valve 240 are communicated), and at this time, the refrigerant flow path is as follows: the high-temperature and high-pressure refrigerant sent by the compressor 210 flows into the indoor unit 100 through the d-e interface of the first four-way valve 230 to release heat, then the refrigerant after releasing heat flows into the outdoor heat exchanger 220 through the expansion valve 130 and the first solenoid valve 120 to absorb heat, and the refrigerant after absorbing heat flows back to the compressor 210 through the h-i interface of the second four-way valve 240.
During the operation, the ambient temperature unit 221 detects and obtains an ambient temperature value (T4) in real time, and the second temperature unit 311 detects and obtains a liquid pipe temperature value (T3C) in real time, wherein when a temperature difference value between the detected ambient temperature value and the liquid pipe temperature value is greater than or equal to a predetermined first temperature difference (T4-T3C is greater than or equal to 5 ℃), and the liquid pipe temperature value is lower than a rated liquid pipe temperature (T3C is less than 2 ℃), floor heating anti-freezing detection protection is started. Specifically, when the floor heating anti-freezing detection protection is started, the outdoor unit 200 is stopped until the floor heating anti-freezing detection protection is quitted (when T4-T3C is less than 5 ℃ or T3C is more than or equal to 2 ℃, the floor heating anti-freezing detection protection is quitted).
In addition, when the temperature difference value between the detected environment temperature value and the liquid pipe temperature value is smaller than a preset first temperature difference (T4-T3C is less than 5 ℃), water conservancy anti-freezing detection protection is started. Specifically, when the water conservancy anti-freezing detection protection is started, the environment temperature unit 221 detects and obtains an environment temperature value (T4) in real time and the first temperature unit 350 detects and obtains a water temperature value (Tw) in real time, wherein when the environment temperature value is detected to be lower than the rated environment temperature (T4 is less than 7 ℃) and the water temperature value is not higher than the rated water temperature (Tw is less than or equal to 3 ℃), the circulating water pump 330 is started to operate for a rated time (the rated time is 2 min), and then the first temperature unit 350 detects and obtains the water temperature value for the second time.
Further, if the water temperature value detected for the second time is still not higher than the rated water temperature (Tw is less than or equal to 3 ℃), the electric auxiliary heating unit 340 is turned on for the rated heating time (the rated time is 2 min), and then the first temperature unit 350 detects the water temperature value for the third time. On the contrary, if the water temperature value detected for the second time is still higher than the rated water temperature (Tw > 3 ℃), the circulating water pump 330 is closed and the water conservancy anti-freezing detection protection is exited.
Further, if the water temperature value detected for the third time is still not higher than the rated water temperature (Tw is less than or equal to 3 ℃), the floor heating multi-split air conditioner is switched to a floor heating mode (the first four-way valve 230 and the second four-way valve 240 are powered off and the first electromagnetic valve 120 is closed), so that the heat pump system forcibly heats the water conservancy heat exchanger until the water temperature value detected in real time is higher than the rated protection temperature (Tw is greater than 25 ℃), the water conservancy anti-freezing detection protection is exited, and the floor heating multi-split air conditioner is switched to a non-floor heating mode to normally operate. On the contrary, if the water temperature value detected for the third time is higher than the rated water temperature (Tw > 3 ℃), the circulating water pump 330 and the electric auxiliary thermal module are closed after the rated time (the rated time is 20 s), and the water conservancy anti-freezing detection protection is quitted.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents to the embodiments of the invention without departing from the scope of the invention as set forth in the claims below. Therefore, equivalent changes made according to the spirit of the present invention should be covered within the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.
Claims (10)
1. The utility model provides a ground heating multi-split air conditioner with prevent frostbite and monitor, ground heating multi-split air conditioner includes indoor set (100), off-premises station (200) and ground heating module (300), off-premises station (200) include compressor (210), outdoor heat exchanger (220), first four-way valve (230) and second four-way valve (240), ground heating module (300) include hydraulic heat exchanger (310) and ground heating coil (320), its characterized in that: interfaces d, e, c and s of the first four-way valve (230) are respectively connected with an output end of the compressor (210), an indoor unit (100), an interface g of the second four-way valve (240) and an air return end of the compressor (210), and interfaces h, i and f of the second four-way valve (240) are respectively connected with an outdoor heat exchanger (220), an air return end of the compressor (210) and one end of a refrigerant flow path of the hydraulic heat exchanger (310); the indoor unit (100) is connected with the outdoor heat exchanger (220) through an expansion valve (130) and a first electromagnetic valve (120); the other end of a refrigerant flow path of the hydraulic heat exchanger (310) is connected between the first electromagnetic valve (120) and the outdoor heat exchanger (220) in a bypassing mode through a first check valve (250), the two ends of a water flow path of the hydraulic heat exchanger (310) are respectively connected with the floor heating coil (320) through a water inlet pipe and a water outlet pipe, wherein the water outlet pipe is provided with an electric auxiliary heating unit (340), and the water inlet pipe is provided with a circulating water pump (330); the temperature measurement device is characterized by further comprising an ambient temperature unit (221) which is arranged at the outdoor heat exchanger (220) and used for detecting and acquiring an ambient temperature value, an indoor unit temperature unit (140) which is arranged at the indoor unit (100) and used for detecting and acquiring an indoor unit temperature value, a first temperature unit (350) which is arranged on a water flow path of the hydraulic heat exchanger (310) and used for detecting and acquiring a water temperature value, and a second temperature unit (311) which is arranged on a refrigerant flow path outlet of the hydraulic heat exchanger (310) and used for detecting and acquiring a liquid pipe temperature value.
2. The floor heating multi-split air conditioner with antifreezing monitoring function as claimed in claim 1, wherein: the first temperature unit (350) is composed of water temperature sensors respectively arranged at the water inlet position and the water outlet position of a water flow path of the hydraulic heat exchanger (310), and the water outlet temperature and the water inlet temperature of the hydraulic heat exchanger (310) are respectively detected and obtained through the two water temperature sensors.
3. The floor heating multi-split air conditioner with antifreezing monitoring function as claimed in claim 1, wherein: the indoor unit (100) comprises at least two indoor heat exchangers (110) which are arranged in parallel, wherein each indoor heat exchanger (110) is provided with an indoor unit temperature unit (140), each indoor unit temperature unit (140) consists of a middle temperature sensor (141) arranged in the middle of the indoor heat exchanger (110) and an outlet temperature sensor (142) arranged at the outlet of the indoor heat exchanger (110), and the middle temperature and the outlet temperature of the indoor heat exchanger (110) are respectively detected and obtained through the middle temperature sensor (141) and the outlet temperature sensor (142).
4. An anti-freezing control method for floor heating multi-split air conditioner with anti-freezing monitoring function as claimed in any one of claims 1 to 3, characterized in that: the ground heating multi-split air conditioner comprises a ground heating mode and a non-ground heating mode, wherein,
in a floor heating mode, the first four-way valve (230) and the second four-way valve (240) are powered off and the first electromagnetic valve (120) is closed, during the operation period, the indoor unit temperature unit (140) detects and obtains an indoor unit temperature value in real time, and if the indoor unit temperature value is detected to be lower than 0 ℃, indoor anti-freezing detection protection is started.
In a non-floor heating mode, the first four-way valve (230) and the second four-way valve (240) are powered on and the first electromagnetic valve (120) is started, during the operation period, the environment temperature unit (221) detects and acquires an environment temperature value in real time and the second temperature unit (311) detects and acquires a liquid pipe temperature value in real time, wherein when the temperature difference value between the detected environment temperature value and the liquid pipe temperature value is larger than or equal to a preset first temperature difference and the liquid pipe temperature value is lower than the rated liquid pipe temperature, floor heating anti-freezing detection protection is started; and when the temperature difference value between the detected environment temperature value and the liquid pipe temperature value is smaller than a preset first temperature difference, starting water conservancy anti-freezing detection protection.
5. The anti-freezing control method for the floor heating multi-split air conditioner with anti-freezing monitoring function as claimed in claim 4, wherein the anti-freezing control method comprises the following steps: when the indoor anti-freezing detection protection is started, firstly closing the expansion valve (130), and then detecting the temperature value of the indoor unit by the indoor unit temperature unit (140) again, wherein if the temperature value of the indoor unit is detected to be increased and higher than 0 ℃, a fault of the first electromagnetic valve (120) is reported; and if the temperature value of the internal machine is detected to be continuously lower than 0 ℃, reporting faults of the first electromagnetic valve (120) and the expansion valve (130).
6. The anti-freezing control method for the floor heating multi-split air conditioner with anti-freezing monitoring function as claimed in claim 4, wherein the anti-freezing control method comprises the following steps: when floor heating anti-freezing detection protection is started, the outdoor unit (200) is stopped.
7. The antifreeze control method for the floor heating multi-split air conditioner with antifreeze monitoring function as claimed in claim 2, wherein the antifreeze control method comprises the following steps: when water conservancy anti-freezing detection protection is started, the environment temperature unit (221) detects in real time to obtain an environment temperature value and the first temperature unit (350) detects in real time to obtain a water temperature value, wherein when the environment temperature value is detected to be lower than the rated environment temperature and the water temperature value is not higher than the rated water temperature, the circulating water pump (330) is started to operate for the rated time, and then the first temperature unit (350) detects for the second time to obtain the water temperature value.
8. The anti-freezing control method for the floor heating multi-split air conditioner with anti-freezing monitoring function as claimed in claim 4, wherein the anti-freezing control method comprises the following steps: if the water temperature value detected for the second time is still not higher than the rated water temperature, the electric auxiliary heating unit (340) is started to heat for the rated time, and then the first temperature unit (350) detects for the third time to obtain the water temperature value; otherwise, if the water temperature value detected for the second time is still higher than the rated water temperature, the circulating water pump (330) is closed and the water conservancy anti-freezing detection protection is quit.
9. The antifreeze control method for the floor heating multi-split air conditioner with antifreeze monitoring function as claimed in claim 8, wherein the antifreeze control method comprises the following steps: and if the water temperature value detected for the third time is higher than the rated water temperature, delaying the rated time, closing the circulating water pump (330) and the electric auxiliary heat module, and exiting the water conservancy anti-freezing detection protection.
10. The antifreeze control method for the floor heating multi-split air conditioner with antifreeze monitoring function as claimed in claim 8, wherein the antifreeze control method comprises the following steps: and if the water temperature value detected for the third time is still not higher than the rated water temperature, the floor heating multi-split air conditioner is switched to a floor heating mode, the outdoor unit (200) forcibly heats the water conservancy heat exchanger, and the water conservancy anti-freezing detection protection is quitted and the floor heating mode is switched to a non-floor heating mode for normal operation until the water temperature value detected in real time is higher than the rated protection temperature.
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