CN103134124A - Ground source heat pump system and control method thereof - Google Patents
Ground source heat pump system and control method thereof Download PDFInfo
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- CN103134124A CN103134124A CN2011103820367A CN201110382036A CN103134124A CN 103134124 A CN103134124 A CN 103134124A CN 2011103820367 A CN2011103820367 A CN 2011103820367A CN 201110382036 A CN201110382036 A CN 201110382036A CN 103134124 A CN103134124 A CN 103134124A
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Abstract
The invention provides a ground source heat pump system which comprises an air conditioner main engine, a ground source pipeline and an indoor unit. The indoor unit comprises a fan coil, floor heating, a radiation hang ceiling and a corresponding controller. The air conditioner main engine comprises a compressor, a four-way valve, an air conditioner side panel, a water source side panel, an electronic expansion valve, a first electric tee valve, a second electric tee valve, an air conditioner water pump, a water source water pump, a waterway magnetic valve and a corresponding controller. The control method of the ground source heat pump system includes: controlling according to temperature of ground source and a room, adopting the mode that the ground water directly cools and a compressor starts cooling during cooling according to temperature of the room and environment, enabling the ground water to preheat in advance and then the compressor to start preheat during heating according to the temperature of the room and the environment. The ground source heat pump system and the control method of the ground source heat pump system have the advantages of preventing temperature and high pressure of low condensate water from being too low, avoiding insufficient pressure difference and abrasion of the compressor during start, and greatly saving energy.
Description
Technical field
This patent belongs to refrigerated air-conditioning system and forms, and is conducive to reduce air conditioning energy consumption, can improve the reliability of unit simultaneously, belongs to field of Refrigeration and Air-conditioning.
Background technology
Earth source heat pump is obtaining the active support of the government as an air-conditioning technical, and environmental administration also releases relevant preferential policy, is mainly because this technology has the following advantage: energy-conservation, low noise, without tropical island effect.Its principle is, pump into the heat dissipation capacity of refrigeration space and power consumption with main frame underground summer, and take out underground heat with main frame and be discharged in the heating space winter.Because underground thermal capacitance is large, underground temperature stabilization, the unit power consumption is low, and unit operation is stable, and the life-span is long, and owing to there is no blower fan, the noise of main frame is low, and main frame does not have to the atmosphere heat extraction, so this system does not have tropical island effect summer.
Underground temperature is probably at 10～28 degree, the initial temperature of water source system is 10～28 degree approximately, the temperature of air is at-10～43 degree on the ground, the initial temperature of air-conditioner water system is 3～43 degree approximately, and this just produces the following problem, in initial a period of time of refrigeration in summer, as the water source system temperature of cooling water lower than the air-conditioner water system temperature, compressor is high forcing down during this period of time, and pressure reduction is low, and operating condition worsens; Winter heating is in initial a period of time, is significantly less than the water source system temperature as the air-conditioner water system temperature of condensation side, and compressor is high forcing down during this period of time, and pressure reduction is low, and operating condition is abominable.
In addition, early summer and transition season, the temperature of water source system is lower, can be directly used in refrigeration; Early winter and transition season, the temperature of water source system is relatively high, and heating this moment demand is low, can be directly used in heating.Company only provides the unit that contains cross valve and four large parts due to main frame production, installation company is merely able to increase in addition a cover water system and utilizes the water source system to carry out air conditioning, the general employing manually in control aspect controlled, and can not reasonably utilize the water source system capacity.
Summary of the invention
The present invention according to the demand provide a kind of earth-source hot-pump system with and control method, this system comprises the interior loom of a host subsystem, system, ground source subsystem and communication wire road and water system connecting line; During normal operation, the water source system flow absorbs heat to the earth through ground source heat exchanger during heating, gives the cold-producing medium of evaporation in ground source heat exchanger release heat, discharges heat to the earth during refrigeration, absorbs heat in ground source heat exchanger; The air-conditioner water system current are through air-conditioning side heat exchanger, and the cold-producing medium to condensation during heating absorbs heat, release heat in the interior machine.In early summer, in early winter, the water of water source system enters indoor set through the switching of triple valve, freely freezes or free heating.In summer, when room temperature was higher, the water of water source system first entered indoor set through the switching of triple valve, carries out free precooling, and after indoor temperature was reduced to a fixed point, main frame carried out normal refrigerating operaton.In the winter time, when room temperature was low, the water of water source system first entered indoor set through the switching of triple valve, carries out free preheating, and after indoor temperature was reduced to a fixed point, main frame carried out normal heating operation.
For realizing above-mentioned functions; the refrigerant loop of host subsystem comprise compressor or compressor bank, four-way change-over valve, air-conditioning side heat exchanger, source heat exchanger, expansion valve and relevant pipeline and protective device, water loop comprises two electric T-shaped valves, an electric two-way valve, a water source pump, a water pump of air conditioner.Source, ground subsystem has comprised source capsule road, ground, and outlet of an import is arranged; The indoor set subsystem comprises water route switch, aerial temperature and humidity sensor and the Communication Control circuit of interior machine, interior machine.The division of subsystem is to carry out according to the convenience of making and control, and any one relates to and has comprised these parts, all belongs to protection scope of the present invention.Wherein indoor set can be fan coil, radiation ceiling, floor heating etc.
For realizing the purpose of above-mentioned power saving function and raising unit reliability, the control system of unit, comprise master machine control unit, indoor set control module, indoor and outdoor Temperature Humidity Sensor and corresponding control circuit, this scheme is according to the operational mode of indoor temperature and water source temperature optimization main frame; Operational mode comprises: before the direct refrigeration mode of water source, refrigeration, precooling pattern, compressor start freeze, heat front preheating mode, compressor start heating mode, preventing freeze in winter pattern.Indoor set sends start request, indoor temperature and humidity signal to master machine control unit, and master machine control unit sends a signal to water source pump, water pump of air conditioner, allows its operation, gathers water temperature, and master machine control unit is according to these parameters selection unit operational modes.
The service condition of the direct refrigeration mode of water source is that (source, indoor temperature setting value-ground inflow temperature value)＜5 are spent.
Before refrigeration, the service condition of water source precooling pattern is, (indoor temperature currency-source, ground inflow temperature value)＜10 degree ends at (indoor temperature currency-source, ground inflow temperature value)＜5 degree.
The service condition of compressor start refrigeration mode is, (indoor temperature currency-source, ground inflow temperature value)＜5 degree, perhaps (indoor temperature value-setting value)＞5 are spent, and keep 10 minutes constant.
The service condition that heats front preheating mode is, (source inflow temperature value-indoor temperature currency)＞8 degree end at, (source inflow temperature value-indoor temperature currency)＜4 degree.
The service condition of compressor start heating mode is, (source inflow temperature value-indoor temperature currency)＜4 degree, perhaps (indoor temperature value-setting value)＞5 are spent, and keep 10 minutes constant.
The preventing freeze in winter pattern, when the air-conditioning water temperature was spent lower than 3, unit entered anti-freezing pattern, ended at after 3 minutes.
Description of drawings
Fig. 1 is systematic schematic diagram
1, host subsystem; 2, interior loom system; 3, source subsystem; 11, compressor bank; 12, source heat exchanger; 13, air-conditioning side heat exchanger; 14, water pump of air conditioner; 15, master machine control unit; 16, the second electric T-shaped valve; 17, the first electric T-shaped valve; 18, water source pump; 19, motor-driven valve; 21 interior machine blower fans; 22, interior machine radiator; 23, indoor set motor-driven valve; 24, interior machine control module; 31, source capsule road.
The specific embodiment:
The direct refrigeration mode of water source:
Interior machine sends the refrigeration signal, main frame the-electric T-shaped valve (17), the second electric T-shaped valve (16) be in power-up state, motor-driven valve (19) disconnect, the interior non-water flow of source heat exchanger (12), the interior non-water flow of air-conditioning side heat exchanger (13), water source pump (18) is opened, water pump of air conditioner (14) is opened, and the master machine control unit collection is from the coolant-temperature gage value of indoor air themperature and desired temperature, water source system; (indoor temperature currency-source, ground inflow temperature value)＜5 degree; Unit enters direct refrigeration mode.Such as water source temperature 15 degree, indoor temperature setting value 26 degree differ 11 degree, and unit enters direct refrigeration mode.
Water source precooling pattern before refrigeration:
Interior machine sends the refrigeration signal, main frame the first electric T-shaped valve (17) and the second electric T-shaped valve (16) be in power-up state, motor-driven valve (19) disconnect, the interior non-water flow of source heat exchanger (12), the interior non-water flow of air-conditioning side heat exchanger (13), water source pump (18) is opened, water pump of air conditioner (14) is opened, allow water system operation 3～5 minutes, the master machine control unit collection is from the coolant-temperature gage value of indoor air themperature and desired temperature, water source system; (indoor temperature currency-source, ground inflow temperature value)＜10 degree, unit enter the front water source precooling pattern pattern of refrigeration, end at (indoor temperature currency-source, ground inflow temperature value)＜5 degree.Such as water source temperature 22 degree, indoor current temperature value 38 degree differ 16 degree, and unit enters the front water source precooling pattern pattern of refrigeration; When indoor temperature drops to 27 when spending, unit finishes the precooling pattern.
The compressor start refrigeration mode:
after water source precooling pattern, (indoor temperature currency-source, ground inflow temperature value)＜5 degree, perhaps (indoor temperature value-setting value)＞5 are spent, and keep 10 minutes constant, unit need to start compressor and freeze, this moment, main frame the first electric T-shaped valve (17) and the second electric T-shaped valve (16) were in pass-through state, motor-driven valve (19) is opened, water source pump (18) is opened, water pump of air conditioner (14), water source stream is arranged in ground source heat exchanger (12), air conditioner water stream is arranged in air-conditioning side heat exchanger (13), compressor (11) starts and freezes.
Heat front preheating mode:
Interior machine sends and heats signal, main frame the first electric T-shaped valve (17) and the second electric T-shaped valve (16) be in power-up state, motor-driven valve (19) disconnect, the interior non-water flow of source heat exchanger (12), the interior non-water flow of air-conditioning side heat exchanger (13), water source pump (18) is opened, water pump of air conditioner (14) is opened, allow water system operation 3～5 minutes, the master machine control unit collection is from the coolant-temperature gage value of indoor air themperature and desired temperature, water source system; The service condition that heats front preheating mode is, (source inflow temperature value-indoor temperature currency)＞8 degree end at (source inflow temperature value-indoor temperature currency)＜4 degree.
The compressor start heating mode:
after preheating begins, (if source inflow temperature value-indoor temperature currency)＜4 degree, perhaps (indoor temperature value-setting value)＞5 are spent, and keep 10 minutes constant, unit need to start compressor and heat, this moment, main frame the first electric T-shaped valve (17) and the second electric T-shaped valve (16) were in pass-through state, motor-driven valve (19) is opened, water source pump (18) is opened, water pump of air conditioner (14), water source stream is arranged in ground source heat exchanger (12), air conditioner water stream is arranged in air-conditioning side heat exchanger (13), compressor (11) startup heats.
The preventing freeze in winter pattern:
During the winter unit outage, temperature is low, the air-conditioning water temperature descends, when spending lower than 3, main frame the first electric T-shaped valve (17) and the second electric T-shaped valve (16) be in power-up state, motor-driven valve (19) disconnect, the interior non-water flow of source heat exchanger (12), the interior non-water flow of air-conditioning side heat exchanger (13), water pump of air conditioner (14) is opened, and allows water system move 3 minutes
Claims (9)
1. ground origin system, comprise main frame (1), at least one indoor unit (2), the pipeline of source capsule road and corresponding connection, it is characterized in that: 1) main frame (1) can be adjusted the water that enters indoor unit; 2) indoor unit can be fan coil, radiation ceiling, floor heating; 3) the source capsule road is a closed system.
Main computer unit according to claim 1 (1) comprise contain at least one can cooling and warming refrigerant system, and water system that can waterway switching, and the master machine control unit (15) that two systems are controlled.
Refrigerant system according to claim 2 comprise compressor (11), source heat exchanger (12), air-conditioning side heat exchanger (13) and corresponding pipeline.
4. water system according to claim 2 comprises the first electric T-shaped valve (17), the second electric T-shaped valve (16), water source pump (18), water pump of air conditioner (14), electric two-way valve (19); Wherein the first electric T-shaped valve (17) has three connections, the outlet of the ground source heat exchanger (12) of ining succession, and an entrance that connects water source pump (18), one is connecting the air conditioner water delivery side of pump; The second electric T-shaped valve (16) has three connections, the land entrance of source heat exchanger (12) of a connection, and the land outlet on source capsule road (3) of a connection, one is connecting the air conditioner water delivery port; Electric two-way valve (19) is placed in the entrance of air-condition heat exchanger;
5. main frame according to claim 2 has four water route connectors, and two connect indoor unit, and two connect source capsule road, ground.
6. ground origin system control program, comprise master machine control unit (15), indoor set control module (24), indoor and outdoor Temperature Humidity Sensor (25), and corresponding control circuit, this scheme is according to the operational mode of indoor temperature, design temperature and water source temperature optimization main frame; This operational mode comprises: compressor start carries out air conditioning, water source road and enters the indoor free air conditioning of carrying out.
7. control program according to claim 6, indoor set sends start request, ambient temperature signal, indoor temperature and humidity signal to master machine control unit, master machine control unit sends a signal to water source pump, water pump of air conditioner, allow its operation, gather water temperature, master machine control unit is selected the unit operational mode according to these parameters.
8. operational mode according to claim 7 comprises: before the direct refrigeration mode of water source, refrigeration, precooling pattern, compressor start freeze, heat front preheating mode, compressor start heating mode, preventing freeze in winter pattern.
9. the service condition of the direct refrigeration mode of water source according to claim 8 is, (source, indoor temperature setting value-ground inflow temperature value)＜5 degree.
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| CN2011103820367A CN103134124A (en) | 2011-11-24 | 2011-11-24 | Ground source heat pump system and control method thereof |
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| CN2011103820367A CN103134124A (en) | 2011-11-24 | 2011-11-24 | Ground source heat pump system and control method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486763A (en) * | 2013-09-24 | 2014-01-01 | 陈万仁 | Liquid circulation type energy-gaining water ring heat pump device |
| CN104374020A (en) * | 2013-08-16 | 2015-02-25 | 中国建筑科学研究院 | Water source heat pump air conditioning system |
| CN105485830A (en) * | 2015-06-12 | 2016-04-13 | 张宝明 | Constant-temperature and energy-saving control system for ground source heat pumps, and control method thereof |
| CN107246691A (en) * | 2017-08-03 | 2017-10-13 | 沃逸新能源科技（江苏）有限公司 | A kind of power saving ground-source heat pump |
| CN112032992A (en) * | 2020-09-07 | 2020-12-04 | 大连理工大学 | Control method of personalized environment control radiation air-conditioning system for different physiques |
| CN112594813A (en) * | 2020-12-16 | 2021-04-02 | 天津市圣美装饰工程有限公司 | Intelligent indoor environment adjusting method |
| CN115451568A (en) * | 2022-09-26 | 2022-12-09 | 宁波奥克斯电气股份有限公司 | Water temperature control system and control method thereof, air conditioner and computer readable storage medium |
| WO2023115799A1 (en) * | 2021-12-21 | 2023-06-29 | 石家庄科林电气股份有限公司 | Control method for ground source heat pump central air conditioning system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104374020A (en) * | 2013-08-16 | 2015-02-25 | 中国建筑科学研究院 | Water source heat pump air conditioning system |
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| CN112032992A (en) * | 2020-09-07 | 2020-12-04 | 大连理工大学 | Control method of personalized environment control radiation air-conditioning system for different physiques |
| CN112594813A (en) * | 2020-12-16 | 2021-04-02 | 天津市圣美装饰工程有限公司 | Intelligent indoor environment adjusting method |
| WO2023115799A1 (en) * | 2021-12-21 | 2023-06-29 | 石家庄科林电气股份有限公司 | Control method for ground source heat pump central air conditioning system |
| CN115451568A (en) * | 2022-09-26 | 2022-12-09 | 宁波奥克斯电气股份有限公司 | Water temperature control system and control method thereof, air conditioner and computer readable storage medium |
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Application publication date: 20130605 |