CN106440453B - Split type air source heating system and control method thereof - Google Patents
Split type air source heating system and control method thereof Download PDFInfo
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- CN106440453B CN106440453B CN201610753657.4A CN201610753657A CN106440453B CN 106440453 B CN106440453 B CN 106440453B CN 201610753657 A CN201610753657 A CN 201610753657A CN 106440453 B CN106440453 B CN 106440453B
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a split type air source heating system and a control method thereof. The method comprises a heating mode, a cooling mode and a switching mode. When the heating system and the refrigeration system are switched, the pressure sensor is used for detecting the pressure of the system in real time, and meanwhile, partial components of the system are closed and vacuumized, so that the safety problem and the influence on the operation efficiency caused by uneven distribution of refrigerants when the parallel heating and refrigeration system is switched are effectively avoided. In addition, the invention adopts the fluorine-free capillary tube to exchange heat with the floor for direct heating, thereby omitting the intermediate heat transfer process, avoiding the influence of the heating efficiency caused by the fluctuation of the water temperature in the prior water-conveying system, effectively ensuring the heating efficiency, having no need of considering anti-freezing measures and greatly saving the cost. The invention can be widely applied to the parallel cooling and heating system.
Description
Technical Field
The invention relates to the technical field of floor heating, in particular to a split type air source heating system and a control method thereof.
Background
In the past, the problems that the traditional triple-generation heating and refrigerating system is complex and the refrigerating efficiency is not high due to heat recovery are solved by adopting a parallel cooling and heating system, but the following problems still occur:
1. when the parallel cooling and heating system is switched, the problem of system safety caused by uneven refrigerant distribution is easy to occur, and the operation efficiency of the unit is influenced;
2. the floor heating system is connected in parallel with the heating system to realize floor heating, heat is transferred to water through the heat pump condenser, and the water is radiated to the floor after being heated, so that the mode is not direct heat exchange heating, but an intermediate heat transfer process of exchanging heat between water and the condenser is increased, the heating effect is easily influenced due to fluctuation of the water temperature, and the water passing system also needs to consider anti-freezing measures, so that the early cost is increased, and the heating efficiency is also influenced if the anti-freezing measures are improper.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a split type air source heating system and a control method thereof, which can avoid uneven distribution of refrigerant and ensure heating efficiency.
The technical scheme adopted by the invention is as follows:
the utility model provides a split type air source heating system, includes heat exchanger, compressor, cross valve, refrigeration module and heats the module, the gas outlet of compressor is connected to the D mouth of cross valve, the return air inlet of compressor is connected to the S mouth of cross valve, the C mouth of cross valve is connected to the input of heating the module and the output of refrigeration module respectively, the output of heating the module and the input of refrigeration module all are connected to the first end of heat exchanger, the second end of heat exchanger is connected to the E mouth of cross valve, be equipped with pressure sensor on the gas circuit between the return air inlet of compressor and the S mouth of cross valve.
As a further improvement of the split-type air source heating system, the refrigeration module comprises a one-way valve, a fan coil and a first throttling device, and the first end of the heat exchanger is connected to a port C of the four-way valve sequentially through the one-way valve, the fan coil and the first throttling device.
As a further improvement of the split air source heating system, the heating module comprises an electromagnetic two-way valve, an anhydrous capillary tube and a second throttling device, and a port C of the four-way valve is connected to the first end of the heat exchanger sequentially through the electromagnetic two-way valve, the anhydrous capillary tube and the second throttling device.
As a further improvement of the split type air source heating system, the heat exchanger is a fin heat exchanger.
The other technical scheme adopted by the invention is as follows:
a control method applied to the split air source heating system comprises a heating mode, a refrigerating mode and a switching mode;
the heating mode specifically comprises the following steps:
high-temperature and high-pressure refrigerant gas generated by the compressor sequentially passes through a port D and a port C of the four-way valve and then enters the anhydrous capillary tube through the electromagnetic two-way valve;
the high-temperature high-pressure refrigerant gas is condensed in the anhydrous capillary tube to radiate heat to the floor to realize heating;
the condensed refrigerant enters the heat exchanger to be evaporated after being throttled by the second throttling device;
the evaporated refrigerant sequentially passes through an E port and an S port of the four-way valve and then returns to the compressor;
the refrigeration mode specifically comprises the following steps:
high-temperature and high-pressure refrigerant gas generated by the compressor sequentially passes through a port D and a port E of the four-way valve and then enters the heat exchanger for condensation;
the condensed refrigerant is throttled by the first throttling device and then enters the fan coil, and the fan coil evaporates the refrigerant by absorbing external heat, so that refrigeration is realized;
the evaporated refrigerant sequentially passes through a port C and a port S of the four-way valve and then returns to the compressor;
the switching mode specifically comprises the following steps:
closing the first throttling device and the second throttling device, opening the electromagnetic two-way valve, and simultaneously keeping the compressor, the four-way valve and the heat exchanger in an opening state;
the system pressure is detected through the pressure sensor in real time, the refrigerant is extracted into the heat exchanger in a vacuumizing mode at the same time, and the system is stopped until the system pressure reaches a preset minimum threshold value, so that the system is started to enter a mode needing to run.
As a further improvement of the control method of the split air source heating system, when the heating mode and the cooling mode are switched to each other, the switching mode is executed.
The invention has the beneficial effects that:
according to the split type air source heating system and the control method thereof, when heating and refrigerating are switched, the pressure of the system is detected in real time through the pressure sensor, and meanwhile, partial components of the system are closed and vacuumized, so that the safety problem and the influence on the operation efficiency caused by uneven distribution of refrigerants when the parallel cooling and heating system is switched are effectively avoided. In addition, the invention adopts the fluorine-free capillary tube to exchange heat with the floor for direct heating, thereby omitting the intermediate heat transfer process, avoiding the influence of the heating efficiency caused by the fluctuation of the water temperature in the prior water-conveying system, effectively ensuring the heating efficiency, having no need of considering anti-freezing measures and greatly saving the cost.
Drawings
The following further describes embodiments of the present invention in conjunction with the attached figures:
FIG. 1 is a schematic diagram of a split air source heating system of the present invention;
FIG. 2 is a schematic view illustrating a control method of a split type air source heating system according to the present invention;
fig. 3 is a heating mode flowchart of a control method of a split type air source heating system according to the present invention;
fig. 4 is a flow chart of a cooling mode of a control method of a split type air source heating system according to the present invention;
fig. 5 is a flow chart illustrating a switching mode of a control method of a split type air source heating system according to the present invention.
Detailed Description
Referring to fig. 1, the split air source heating system of the present invention includes a heat exchanger 1, a compressor 2, a four-way valve 3, a refrigeration module 4 and a heating module 5, wherein an air outlet of the compressor 2 is connected to a D port of the four-way valve 3, an air return port of the compressor 2 is connected to an S port of the four-way valve 3, a C port of the four-way valve 3 is respectively connected to an input end of the heating module 5 and an output end of the refrigeration module 4, both an output end of the heating module 5 and an input end of the refrigeration module 4 are connected to a first end of the heat exchanger 1, a second end of the heat exchanger 1 is connected to an E port of the four-way valve 3, and a pressure sensor 6 is disposed on an air path between the air return port of the compressor 2 and the S port of the four-way valve 3.
Further as a preferred embodiment, the refrigeration module 4 comprises a one-way valve 41, a fan coil 42 and a first throttling device 43, and the first end of the heat exchanger 1 is connected to the port C of the four-way valve 3 through the one-way valve 41, the fan coil 42 and the first throttling device 43 in sequence.
Further as a preferred embodiment, the heating module 5 includes an electromagnetic two-way valve 51, a non-water capillary tube 52 and a second throttling device 53, and the port C of the four-way valve 3 is connected to the first end of the heat exchanger 1 through the electromagnetic two-way valve 51, the non-water capillary tube 52 and the second throttling device 53 in sequence.
Further preferably, the heat exchanger 1 is a fin heat exchanger.
Referring to fig. 2 to 5, the control method applied to the split type air source heating system of the invention includes a heating mode, a cooling mode and a switching mode;
the heating mode specifically comprises the following steps:
the high-temperature and high-pressure refrigerant gas generated by the compressor 2 sequentially passes through a port D and a port C of the four-way valve 3 and then enters the anhydrous capillary tube 52 through the electromagnetic two-way valve 51;
the refrigerant gas with high temperature and high pressure is condensed in the anhydrous capillary tube 52, and heat is radiated to the floor to realize heating;
the condensed refrigerant is throttled by the second throttling device 53 and then enters the heat exchanger 1 to be evaporated;
the evaporated refrigerant passes through an E port and an S port of the four-way valve 3 in sequence and then returns to the compressor 2;
the refrigeration mode specifically comprises the following steps:
the high-temperature and high-pressure refrigerant gas generated by the compressor 2 sequentially passes through a D port and an E port of the four-way valve 3 and then enters the heat exchanger 1 for condensation;
the condensed refrigerant is throttled by the first throttling device 43 and then enters the fan coil 42, and the fan coil 42 evaporates the refrigerant by absorbing external heat, so that refrigeration is realized;
the evaporated refrigerant passes through a port C and a port S of the four-way valve 3 in sequence and then returns to the compressor 2;
the switching mode specifically comprises the following steps:
the first and second throttling means 43 and 53 are turned off and the electromagnetic two-way valve 51 is turned on while the compressor 2, the four-way valve 3, and the heat exchanger 1 are kept in an on state;
the system pressure is detected through the pressure sensor 6 in real time, meanwhile, the refrigerant is extracted into the heat exchanger 1 in a vacuumizing mode, and the shutdown processing is carried out until the system pressure reaches a preset minimum threshold value, so that the system is started to enter a mode needing to run.
In a further preferred embodiment, when the heating mode and the cooling mode are switched to each other, the switching mode is executed.
Example 1 of the system of the invention is as follows:
the invention relates to a split type air source heating system which comprises a heat exchanger 1, a compressor 2, a four-way valve 3, a refrigerating module 4 and a heating module 5, wherein an air outlet of the compressor 2 is connected to a D port of the four-way valve 3, an air return port of the compressor 2 is connected to an S port of the four-way valve 3, a C port of the four-way valve 3 is respectively connected to an input end of the heating module 5 and an output end of the refrigerating module 4, an output end of the heating module 5 and an input end of the refrigerating module 4 are both connected to a first end of the heat exchanger 1, a second end of the heat exchanger 1 is connected to an E port of the four-way valve 3, and a pressure sensor 6 is arranged on an air path between the air return port of the compressor 2 and the S port of the four-way valve 3. In the embodiment, the heat exchanger 1 is a fin heat exchanger.
When heating is needed, the compressor 2 generates high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas enters the heating module 5 after passing through the D port and the C port of the four-way valve 3, the high-temperature high-pressure refrigerant gas is condensed and dissipated in the heating module 5, and heat is directly convectively transferred to the floor to realize heating. The condensed refrigerant becomes low-temperature high-pressure refrigerant liquid, flows out of the heating module 5, enters the fin heat exchanger to be evaporated, and becomes low-temperature low-pressure refrigerant gas, and the low-temperature low-pressure refrigerant gas returns to the compressor 2 through the port E and the port S of the four-way valve 3.
When refrigeration is needed, the compressor 2 generates high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas enters the finned heat exchanger for condensation after passing through the D port and the E port of the four-way valve 3, the condensed refrigerant is changed into low-temperature high-pressure refrigerant liquid and then enters the refrigeration module 4 for evaporation, the refrigeration module 4 absorbs external heat to evaporate the refrigerant, the refrigeration purpose is achieved, and the evaporated refrigerant is changed into low-temperature low-pressure refrigerant gas and returns to the compressor 2 through the C port and the S port of the four-way valve 3.
When the mode needs to be switched, the output end of the heating module 5 and the input end of the refrigerating module 4 are closed, the input end of the heating module 5 is opened, the compressor 2, the four-way valve 3 and the fin heat exchanger are still kept opened, the refrigerant is extracted into the fin heat exchanger through vacuumizing until the pressure sensor 6 detects that the system pressure reaches a preset minimum threshold value, then the system is stopped, and then the system is started to run in a normal heating or refrigerating mode.
Example 2 of the system of the invention is as follows:
the invention discloses a split type air source heating system which comprises a heat exchanger 1, a compressor 2, a four-way valve 3, a refrigerating module 4 and a heating module 5, wherein an air outlet of the compressor 2 is connected to a D port of the four-way valve 3, an air return port of the compressor 2 is connected to an S port of the four-way valve 3, a C port of the four-way valve 3 is respectively connected to an input end of the heating module 5 and an output end of the refrigerating module 4, an output end of the heating module 5 and an input end of the refrigerating module 4 are both connected to a first end of the heat exchanger 1, a second end of the heat exchanger 1 is connected to an E port of the four-way valve 3, and a pressure sensor 6 is arranged on an air path between the air return port of the compressor 2 and the S port of the four-way valve 3. The refrigeration module 4 comprises a one-way valve 41, a fan coil 42 and a first throttling device 43, and a first end of the heat exchanger 1 is connected to a port C of the four-way valve 3 through the one-way valve 41, the fan coil 42 and the first throttling device 43 in sequence. The heating module 5 comprises an electromagnetic two-way valve 51, an anhydrous capillary tube 52 and a second throttling device 53, and a port C of the four-way valve 3 is connected to a first end of the heat exchanger 1 through the electromagnetic two-way valve 51, the anhydrous capillary tube 52 and the second throttling device 53 in sequence. In the embodiment, the heat exchanger 1 is a fin heat exchanger.
When heating is needed, the compressor 2 generates high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas passes through the D port and the C port of the four-way valve 3 and then enters the anhydrous capillary tube 52 through the electromagnetic two-way valve 51, the high-temperature and high-pressure refrigerant gas is condensed and dissipated in the anhydrous capillary tube 52, and heat is directly convectively transferred to the floor to realize heating. The condensed refrigerant becomes a low-temperature high-pressure refrigerant liquid, is throttled by the second throttling device 53, enters the fin heat exchanger to be evaporated, and becomes a low-temperature low-pressure refrigerant gas, and the low-temperature low-pressure refrigerant gas returns to the compressor 2 through the ports E and S of the four-way valve 3.
When refrigeration is needed, the compressor 2 generates high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas enters the fin heat exchanger to be condensed after passing through the D port and the E port of the four-way valve 3, the condensed refrigerant is changed into low-temperature and high-pressure refrigerant liquid, the low-temperature and high-pressure refrigerant liquid is throttled by the first throttling device 43 and then enters the fan coil 42 to be evaporated, the fan coil 42 absorbs external heat for evaporation, the refrigeration purpose is achieved, and the evaporated refrigerant is changed into low-temperature and low-pressure refrigerant gas and returns to the compressor 2 through the C port and the S port of the four-way valve 3.
When the mode needs to be switched, the first throttling device 43 and the second throttling device 53 are closed, the electromagnetic two-way valve 51 is opened, the compressor 2, the four-way valve 3 and the fin heat exchanger are still opened, the refrigerant is pumped into the fin heat exchanger through vacuumizing until the pressure sensor 6 detects that the system pressure reaches a set minimum value, then the system is stopped, and then the system is started to run in a normal heating or cooling mode.
From the above, according to the split type air source heating system and the control method thereof, when heating and cooling are switched, the pressure sensor 6 is used for detecting the pressure of the system in real time, and meanwhile, partial components of the system are closed and vacuumized, so that the safety problem and the influence on the operation efficiency caused by uneven distribution of refrigerants when the parallel cooling and heating system is switched are effectively avoided. In addition, the invention adopts the anhydrous capillary tube 52 to exchange heat with the floor for direct heating, thereby omitting the intermediate heat transfer process, avoiding the influence of the heating efficiency of the prior water-conveying system caused by the fluctuation of water temperature, effectively ensuring the heating efficiency, and greatly saving the cost without considering anti-freezing measures.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A split type air source heating system is characterized by comprising a heat exchanger, a compressor, a four-way valve, a refrigerating module and a heating module, wherein an air outlet of the compressor is connected to a port D of the four-way valve, an air return port of the compressor is connected to a port S of the four-way valve, a port C of the four-way valve is respectively connected to an input end of the heating module and an output end of the refrigerating module, an output end of the heating module and an input end of the refrigerating module are both connected to a first end of the heat exchanger, a second end of the heat exchanger is connected to a port E of the four-way valve, and a pressure sensor is arranged on an air path between the air return port of the compressor and the port S of the four-way valve;
the refrigeration module comprises a one-way valve, a fan coil and a first throttling device, and the first end of the heat exchanger is connected to the port C of the four-way valve sequentially through the first throttling device, the fan coil and the one-way valve;
the heating module comprises an electromagnetic two-way valve, an anhydrous capillary tube and a second throttling device, wherein a port C of the four-way valve is connected to the first end of the heat exchanger sequentially through the electromagnetic two-way valve, the anhydrous capillary tube and the second throttling device;
the control method of the split air source heating system comprises a heating mode, a refrigerating mode and a switching mode;
the heating mode specifically comprises the following steps:
high-temperature and high-pressure refrigerant gas generated by the compressor sequentially passes through a port D and a port C of the four-way valve and then enters the anhydrous capillary tube through the electromagnetic two-way valve; the high-temperature high-pressure refrigerant gas is condensed in the anhydrous capillary tube to radiate heat to the floor to realize heating; the condensed refrigerant is throttled by a second throttling device and then enters a heat exchanger for evaporation; the evaporated refrigerant sequentially passes through an E port and an S port of the four-way valve and then returns to the compressor;
the refrigeration mode specifically comprises the following steps:
high-temperature and high-pressure refrigerant gas generated by the compressor sequentially passes through a D port and an E port of the four-way valve and then enters the heat exchanger for condensation; the condensed refrigerant is throttled by the first throttling device and then enters the fan coil, and the fan coil evaporates the refrigerant by absorbing external heat, so that refrigeration is realized; the evaporated refrigerant sequentially passes through a port C and a port S of the four-way valve and then returns to the compressor;
the switching mode specifically comprises the following steps:
closing the first throttling device and the second throttling device, opening the electromagnetic two-way valve, and simultaneously keeping the compressor, the four-way valve and the heat exchanger in an opening state; detecting the system pressure in real time through a pressure sensor, simultaneously extracting a refrigerant into a heat exchanger in a vacuumizing mode, stopping the system until the system pressure reaches a preset minimum threshold value, and further starting the system to enter a mode needing to run;
and when the heating mode and the cooling mode are switched with each other, executing the switching mode.
2. The split-type air-source heating system according to claim 1, wherein the heat exchanger is a fin heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610753657.4A CN106440453B (en) | 2016-08-29 | 2016-08-29 | Split type air source heating system and control method thereof |
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| CN201610753657.4A CN106440453B (en) | 2016-08-29 | 2016-08-29 | Split type air source heating system and control method thereof |
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| CN106440453B true CN106440453B (en) | 2022-07-26 |
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| CN106949531A (en) * | 2017-04-17 | 2017-07-14 | 广东芬尼克兹节能设备有限公司 | A kind of multi-joint hybrid system of anhydrous floor heating and its control method |
| CN107490208B (en) * | 2017-09-04 | 2023-05-19 | 广东芬尼克兹节能设备有限公司 | Refrigerant recovery control system of heat pump unit and control method thereof |
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