CN102679484A - Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source - Google Patents
Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source Download PDFInfo
- Publication number
- CN102679484A CN102679484A CN2012101773332A CN201210177333A CN102679484A CN 102679484 A CN102679484 A CN 102679484A CN 2012101773332 A CN2012101773332 A CN 2012101773332A CN 201210177333 A CN201210177333 A CN 201210177333A CN 102679484 A CN102679484 A CN 102679484A
- Authority
- CN
- China
- Prior art keywords
- heat
- heat exchanger
- water
- air conditioning
- conditioning system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 238000004378 air conditioning Methods 0.000 title claims abstract description 71
- 238000001704 evaporation Methods 0.000 claims abstract description 30
- 230000008020 evaporation Effects 0.000 claims abstract description 27
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000009833 condensation Methods 0.000 claims abstract description 20
- 230000005494 condensation Effects 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005057 refrigeration Methods 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005338 heat storage Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Landscapes
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a water loop heat pump air conditioning system with geothermal energy as a single auxiliary cold and heat source. The water loop heat pump air conditioning system is characterized in that the air conditioning system comprises a ground source end system, a user end air conditioning system, a closed circulating water system and an automatic control system, wherein the user end air conditioning system is communicated with the ground source end system, the closed circulating water system is used for receiving discharged heat and absorbed heat of the user end air conditioning system, and the automatic control system is used for controlling the ground source end system and the user end air conditioning system. The ground source end system comprises a compressor (1), a four-way valve (2), a gas-liquid separator (3) and a function switching area (12) composed of a water-water heat exchanger (4), an evaporation heat exchanger (5), a condensation heat exchanger (6), an expansion valve (7), a first valve (8), a second valve (9), a third valve (10) and a fourth valve (11). The user end air conditioning system comprises a heat supply end heat exchanger (13) and a cooling end heat exchanger (14). According to the water loop heat pump air conditioning system with the geothermal energy as the single auxiliary cold and heat source, waste heat in buildings is fully used and low-grade geothermal energy is efficiently utilized simultaneously.
Description
Technical Field
The invention relates to an optimized water-loop heat pump type air conditioning system taking geothermal energy as a single auxiliary cold and heat source, which is particularly suitable for public buildings and civil buildings with large annual cold and heat load structural change in the buildings.
Background
The traditional water-loop heat pump air-conditioning system consists of an indoor small-sized water/air heat pump unit, a water circulation loop and auxiliary equipment (such as a cooling tower, heating equipment, a heat storage device and the like), and has the advantages of effectively utilizing waste heat in a building, saving cold and heat source equipment and machine room space required by a conventional air conditioner and the like. The water-loop heat pump air-conditioning system uses circulating water as a heating source during heating and uses the circulating water as a heat extraction source during refrigeration, so that when the heat absorption capacity of the water-loop heat pump air-conditioning system during heating operation is smaller than the heat release capacity of the water-loop heat pump air-conditioning system during refrigeration operation, the water temperature in a circulating loop is increased, otherwise, the water temperature is reduced, and in order to maintain a certain performance coefficient of the system, auxiliary heating and cooling devices are required to be additionally arranged.
Therefore, although the current water-loop heat pump air conditioning system can meet the heating and cooling requirements of some colleagues, the following main problems still exist: the system needs to be provided with auxiliary heating and refrigerating devices such as a cooling tower and a boiler, which is contrary to the graded utilization of energy, and the high-level energy is seriously wasted and the equipment is complicated, so that the monitoring and control are not facilitated; the user side adopts a unit type unit, and the compressor is indoors, so that the indoor noise is even greater than that of the fan coil; the traditional water-loop heat pump control method adopts the cooperation of a cooling tower, a heating device and a heat storage device, and divides a functional area for control according to the temperature of a circulating water system, but because a user side adopts a dispersed unit type unit, the difference of the use conditions of air conditioners of different users is large, the control is not favorable directly, and the system performance is reduced.
Therefore, how to improve the auxiliary cold and heat source system and the form of the user air conditioning system and improve the system performance and the user use flexibility has very important significance.
Disclosure of Invention
The technical problem is as follows:the invention provides a water-loop heat pump type air conditioning system taking geothermal energy as a single auxiliary cold and heat source, which aims to solve the problems of control, noise, performance and the like caused by the fact that a high-grade auxiliary cold and heat source device needs to be arranged in the existing water-loop heat pump type air conditioning system and a user side adopts a dispersed unit type unit set.
The technical scheme is as follows:in order to solve the technical problems, the invention provides a water-loop heat pump type air conditioning system taking geothermal energy as a single auxiliary cold and heat source, which comprises a ground source end system, a user end air conditioning system communicated with the ground source end system, a closed circulating water system for receiving heat discharge and heat absorption of the user end air conditioning system and an automatic control system for controlling the ground source end and the user end air conditioning system;
the ground source end system comprises a compressor, a four-way valve, a gas-liquid separator and a function switching area, wherein the function switching area consists of a water-water heat exchanger, an evaporation heat exchanger, a condensation heat exchanger, an expansion valve, a first valve, a second valve, a third valve and a fourth valve;
the user side air conditioning system comprises a heat supply side heat exchanger and a refrigeration side heat exchanger;
the closed circulating water system is a circulating water system for receiving heat discharge and heat absorption of a water-water heat exchanger, an evaporation heat exchanger, a heat exchanger at a heat supply end of a tail end user and a heat exchanger at a refrigeration end, and a temperature sensor is arranged in the closed circulating water system and used for controlling the temperature of circulating water;
the automatic control system comprises a temperature sensor, a control panel and a control program circuit board; wherein,
the outlet of the compressor is connected with the first port of the four-way valve, the second port of the four-way valve is connected with the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected with the inlet of the compressor;
a third port and a fourth port of the four-way valve are respectively connected with the evaporation heat exchanger and the condensation heat exchanger, and the evaporation heat exchanger is connected with the condensation heat exchanger through an expansion valve; the outlet end of the circulating water of the evaporation heat exchanger is connected with the heat supply end heat exchanger and the refrigeration end heat exchanger and returns to the evaporation heat exchanger through a second valve;
the ground source end circulating water is connected with the water-water heat exchanger through a third valve and is connected with the condensing heat exchanger through a fourth valve;
a user side of the water-water heat exchanger is respectively connected with the heat supply end heat exchanger and the refrigeration end heat exchanger through first valves to receive heat absorption and heat release of the user side;
the temperature probe of the temperature sensor is connected into the closed circulating water system and is arranged in the upstream main pipe area of the heat supply end heat exchanger and the refrigerating end heat exchanger, so that the probe end of the temperature sensor monitors the water temperature after heat exchange between the water-water heat exchanger user side and soil during function switching.
Preferably, the heat exchange working media in the evaporation heat exchanger and the condensation heat exchanger are respectively circulating water and a refrigeration working medium, one end of the heat exchange working medium in the water-water heat exchanger is circulating water, and the other end of the heat exchange working medium in the water-water heat exchanger is circulating water at a ground source end;
preferably, the water-water heat exchanger adopts a plate heat exchanger, and the evaporation heat exchanger and the condensation heat exchanger adopt plate type or double-pipe type heat exchangers.
Preferably, the ground source end adopts a vertical buried pipe or a horizontal buried pipe for heat extraction.
Preferably, the user side air conditioning system adopts a user single refrigerating unit in a traditional water loop heat pump system, or adopts any one of semi-centralized air conditioning units which are divided into a refrigerating mode and a heating mode according to user requirements.
Preferably, the semi-centralized air conditioning unit adopts an air-cooled air conditioner or a multi-split variable frequency air conditioner.
Has the advantages that:in the optimized water-loop heat pump air-conditioning system, a cold-hot centralized air-conditioning unit and a semi-centralized air-conditioning unit can be adopted according to different user requirements and cold-hot load structures, so that different air-conditioning tail end functions, service time and control requirements are met; and the air conditioning unit can adopt an air-cooled air conditioner and also can adopt a multi-split variable frequency air conditioner, so that the flexibility is higher, and different end requirements can be met.
Drawings
Fig. 1 is a schematic structural diagram of an optimized water-loop heat pump air conditioning system using geothermal energy as a single auxiliary cold and heat source according to the present invention.
In the figure, a compressor 1, a four-way valve 2, a gas-liquid separator 3, a water-water heat exchanger 4, an evaporation heat exchanger 5, a condensation heat exchanger 6, an expansion valve 7, a first valve 8, a second valve 9, a third valve 10, a fourth valve 11 and a function switching area 12; a heat supply end heat exchanger 13 and a refrigeration end heat exchanger 14; a temperature sensor 15 and a drive controller 16.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides an optimized water-loop heat pump air-conditioning system taking geothermal energy as a single auxiliary cold and heat source, which comprises a geothermal energy tail end system, a closed circulating water system, a semi-centralized/split type heating and refrigerating air-conditioning system, an automatic control system and the like. The geothermal energy tail end system mainly comprises a compressor, a four-way valve, a water-water heat exchanger, two water-working medium heat exchangers and the like. In order to solve the above technical problems, the present invention implements technical update by the following aspects.
The geothermal energy is used as a single cold and heat source, the equipment control units can be effectively reduced, the valve control switching in the function switching area is realized, the additional heating and refrigeration of the ground source end unit completes the temperature rise and the temperature reduction of the circulating water system, the condensing temperature of the annual refrigeration area in the inner area is stabilized once, and the refrigeration performance of the inner area is effectively improved. Due to the stability of geothermal energy, the system can be switched by heating and refrigerating of the geothermal end unit, so that the geothermal energy is used as the single auxiliary low-grade cold and heat source, and high-grade auxiliary cold and heat sources and heat storage devices do not need to be arranged respectively.
The system determines function switching by monitoring the water inlet temperature of a circulating water user, and particularly, the system operation mode comprises four types: in the self-supply mode (mode one), the residual heat in the building can automatically meet the requirement, and the ground source system is completely closed; when the self-sufficient mode can not meet the requirement, a ground source end circulating heat exchange mode (mode two) is started, namely the closed circulating water system utilizes geothermal energy to directly exchange heat, a ground source end unit is closed, and a water pump runs; when the temperature in the closed circulating water system in the circulating heat exchange mode exceeds the set upper limit, starting an additional refrigeration mode (mode three), namely starting a refrigeration working condition of the ground source end unit, and completing temperature regulation of closed circulating water in the ground source end evaporation heat exchanger until the requirement is met; when the temperature in the closed circulating water system is lower than the set lower limit, the ground source end unit starts the additional heat supply working condition (mode four), and the temperature of the closed circulating water is adjusted in the ground source end condensation heat exchanger until the requirement is met. The full utilization of residual heat and low-grade geothermal energy in the building is realized by switching the four operation modes.
According to the control method, the ground source end unit is started to perform additional heating and refrigeration only in the third mode and the fourth mode. The basic temperature (generally 13-35 ℃) required to be met in the closed circulating water system can be set according to the requirements of users during specific adjustment and control, the soil temperature is within the range, and the requirements can be met by adopting a mode two under the cold and heat load structure in most buildings, so that the additional heat supply and refrigeration capacity of the ground source end is small, and the installed capacity of the corresponding ground source end unit is greatly reduced.
The scattered unit set of the user side can cause overlarge noise of the user side, and the use difference of the user is large, so that the control difficulty is increased. In the optimized water-loop heat pump air-conditioning system, a cold-hot centralized air-conditioning unit and a semi-centralized air-conditioning unit can be adopted according to different user requirements and cold-hot load structures, so that different air-conditioning terminal functions, service time and control requirements are met; and the air conditioning unit can adopt air cooling.
The invention provides an optimized water-loop heat pump type air conditioning system taking geothermal energy as a single auxiliary cold and heat source. The invention mainly aims at the problems of high-grade energy waste and the like caused by the fact that cold and heat source devices are required to be additionally arranged in the operation process of the traditional water-loop heat pump air conditioning system respectively, and the defect that the refrigerating coefficient in the perennial refrigeration is lower due to the fact that the temperature of a circulating water system in the traditional system cannot be stably controlled. Meanwhile, due to the characteristic of the stability of geothermal energy, the system can be widely applied to different climatic types. The system mainly comprises a geothermal energy tail end system, a closed circulating water system, a semi-centralized heating and refrigerating air conditioning system and an automatic control system. The operation control mode of the ground source end system comprises the following steps: in the first mode, the residual heat in the building can automatically meet the requirement, and the ground source end system is closed; in the second mode, the closed circulating water system utilizes geothermal energy to directly exchange heat, the ground source end unit is closed, and the water pump runs; in the third mode, when the temperature in the closed circulating water system exceeds the set upper limit, the ground source end unit starts the refrigeration working condition, and the temperature of closed circulating water is adjusted in the ground source end evaporation heat exchanger until the requirement is met; and in the fourth mode, the temperature in the closed circulating water system is lower than the set lower limit, the ground source end unit starts the heat supply working condition, and the temperature of the closed circulating water is adjusted in the ground source end condensation heat exchanger until the requirement is met. Through the switching of four modes, the air conditioning system makes full use of waste heat in the building, and simultaneously efficiently utilizes low-grade geothermal energy.
Referring to fig. 1, the water-loop heat pump type air conditioning system using geothermal energy as a single auxiliary cold and heat source provided by the present invention includes a ground source system, a user side air conditioning system communicated with the ground source system, a closed circulation water system receiving heat rejection and heat absorption of the user side air conditioning system, and an automatic control system for controlling the ground source end and the user side air conditioning system;
the ground source end system comprises a compressor 1, a four-way valve 2, a gas-liquid separator 3 and a function switching area 12 consisting of a water-water heat exchanger 4, an evaporation heat exchanger 5, a condensation heat exchanger 6, an expansion valve 7, a first valve 8, a second valve 9, a third valve 10 and a fourth valve 11;
the user side air conditioning system comprises a heat supply side heat exchanger 13 and a refrigeration side heat exchanger 14;
the closed circulating water system is a circulating water system for receiving heat discharge and heat absorption of the water-water heat exchanger 4, the evaporation heat exchanger 5, the heat exchanger 13 at the heat supply end of the end user and the heat exchanger 14 at the refrigeration end, and a temperature sensor 15 is arranged in the closed circulating water system for controlling the temperature of circulating water;
the automatic control system comprises a temperature sensor 15, a control panel and a control program circuit board; wherein,
an outlet of the compressor 1 is connected with a first port of the four-way valve 2, a second port of the four-way valve 2 is connected with an inlet of the gas-liquid separator 3, and an outlet of the gas-liquid separator 3 is connected with an inlet of the compressor 1;
a third port and a fourth port of the four-way valve 2 are respectively connected with an evaporation heat exchanger 5 and a condensation heat exchanger 6, and the evaporation heat exchanger 5 is connected with the condensation heat exchanger 6 through an expansion valve 7; the outlet end of the circulating water of the evaporative heat exchanger 5 is connected with a heat supply end heat exchanger 13 and a refrigeration end heat exchanger 14 and returns to the evaporative heat exchanger 5 through a second valve 9;
the ground source end circulating water is connected with the water-water heat exchanger 4 through a third valve 10 and is connected with the condensing heat exchanger 6 through a fourth valve 10;
the user side of the water-water heat exchanger 4 is respectively connected with the heat supply end heat exchanger 13 and the refrigeration end heat exchanger 14 through the first valve 8 to receive the heat absorption and heat release of the user side;
the temperature probe of the temperature sensor 15 is connected into the closed circulating water system and is arranged in the upstream main pipe area of the inlets of the heat supply end heat exchanger 13 and the refrigeration end heat exchanger 14, so that the probe end of the temperature sensor 15 monitors the water temperature after heat exchange with soil at the user end of the water-water heat exchanger 4 during function switching.
The heat exchange working media in the evaporation heat exchanger 5 and the condensation heat exchanger 6 are respectively circulating water and a refrigeration working medium, one end of the heat exchange working medium in the water-water heat exchanger 4 is the circulating water, and the other end is ground source end circulating water;
the water-water heat exchanger 4 adopts a plate type heat exchanger, and the evaporation heat exchanger 5 and the condensation heat exchanger 6 adopt plate type and sleeve type heat exchangers.
The ground source end adopts a vertical buried pipe or a horizontal buried pipe for heat taking.
The user side air conditioning system adopts a user single refrigerating unit in a traditional water loop heat pump system or adopts any one of semi-centralized air conditioning units which are divided into refrigerating and heating modes according to user requirements.
The semi-centralized air conditioning unit adopts an air-cooled air conditioner or a multi-split variable frequency air conditioner.
The selected air conditioning unit can be divided into an air-cooled air conditioner and a multi-split variable frequency air conditioner to meet the requirements of heat supply and refrigeration in the building at the same time.
According to the cold and hot load structure in different buildings, the invention is divided into four operation modes by setting the upper and lower limits of the control temperature of the user heat exchanger inlet in the closed circulating water system. The following describes the applicable conditions and adjustment modes of the four operation modes with reference to the drawings.
The first mode is as follows: a self-contained mode. At the moment, the residual heat in the building can automatically meet the requirement, the temperature sensor 15 senses the temperature within the temperature limit set by a user, the compressor 1 is closed, the four-way valve 2 does not act, the function adjusting valve 9 is opened, the valves 8, 10 and 11 are closed, and the ground source end water pump is closed.
Cooling water flow: the cooling water flows through the user side heat supply section heat exchanger 13 and the user refrigeration side heat exchanger 14, and after heat is released and obtained respectively, the cooling water reenters the user heat supply and refrigeration side heat exchangers 13 and 14 through the function regulating valve 9. At the moment, the performance requirement of the simultaneous heating and refrigerating system can be met only by utilizing the waste heat in the building.
And a second mode: when the self-supply mode can not meet the requirement, a ground source end circulating heat exchange mode, namely a mode II, is started, and at the same time, the circulating water system directly utilizes geothermal energy for heat exchange without starting an additional cold and heat source unit at the ground source end. In the second mode, the temperature sensor 15 senses that the temperature exceeds the user set limit, at the moment, the compressor 1 is closed, the four-way valve 2 does not act, the function adjusting valves 8 and 10 are opened, the valves 9 and 11 are closed, and the ground source end water pump is opened.
Cooling water flow: the cooling water flows through the user side heat supply section heat exchanger 13 and the user refrigeration side heat exchanger 14, respectively releases heat and obtains heat, and then enters the water-water heat exchanger 4 through the function regulating valve 8 to exchange heat with the ground source side circulating water. At the moment, the performance requirements of the simultaneous heating and refrigerating system cannot be met only by utilizing the waste heat in the building, and the closed circulating water system utilizes the geothermal energy to directly exchange heat to meet the requirements of users.
And a third mode: and under the operating condition of the mode two, when the temperature in the closed circulating water system in the circulating heat exchange mode still exceeds the set upper limit, starting an additional refrigeration mode, namely, the mode three. And at the moment, the ground source end unit starts the refrigeration working condition, and the temperature of closed circulating water is regulated in the ground source end evaporation heat exchanger until the requirement is met. In the second mode, the temperature sensor 15 senses that the temperature exceeds the upper limit set by the user, at the moment, the compressor 1 is started, the four-way valve 2 acts to adjust the flow direction of the refrigerant to complete the setting of the refrigeration working condition, the function adjusting valves 9 and 11 are started, the valves 8 and 10 are closed, and the water pump at the ground source end is started.
Cooling water flow: the cooling water flows through the user side heat supply section heat exchanger 13 and the user refrigeration side heat exchanger 14, respectively releases heat and obtains heat, and then enters the evaporation heat exchanger 5 through the function regulating valve 9 to exchange heat with the refrigerant under the refrigeration working condition.
Flow of the refrigerant: after being compressed by the compressor 1, the refrigerant turns through the four-way valve 2 to enter the condensing heat exchanger 6 to exchange heat with water in the U-shaped pipe from the ground source end, and then the refrigerant is expanded by the expansion valve 7 to enter the evaporating heat exchanger 5 to exchange heat with closed circulating water, so that the temperature of the closed circulating water is adjusted to meet the set requirement.
And a fourth mode: and under the operating condition of the second mode, when the temperature in the closed circulating water system in the circulating heat exchange mode is still lower than the set upper limit, starting an additional heat supply mode, namely the fourth mode. And meanwhile, the source end unit starts a heat supply working condition, and the temperature of closed circulating water is regulated in the ground source end condensation heat exchanger until the requirement is met. In the second mode, the temperature sensor 15 senses that the temperature exceeds the lower limit set by the user, at the moment, the compressor 1 is started, the four-way valve 2 acts to adjust the flow direction of the refrigerant to complete the setting of the heat supply working condition, the function adjusting valves 9 and 11 are started, the valves 8 and 10 are closed, and the water pump at the ground source end is started.
Cooling water flow: the cooling water flows through the user side heat supply section heat exchanger 13 and the user refrigeration side heat exchanger 14, respectively releases heat and obtains heat, and then enters the condensation heat exchanger 5 through the function regulating valve 9 to exchange heat with the refrigerant under the heat supply working condition.
Flow of the refrigerant: after being compressed by the compressor 1, the refrigerant turns through the four-way valve 2 to enter the condensing heat exchanger 5 to exchange heat with closed circulating water, and then the refrigerant is expanded by the expansion valve 7 and enters the evaporating heat exchanger 6 to exchange heat with water in the U-shaped pipe from the ground source end, so that the temperature of the closed circulating water is adjusted to meet the set requirement.
The automatic control mode is as follows: automatic control and manual control, or both, may be employed. The automatically controlled driving controller mainly comprises a temperature sensor control panel and a control program circuit board, and can adopt a PLC circuit board for control but is not limited to the control mode.
The invention relates to an optimized water-loop heat pump type air conditioning system which effectively utilizes geothermal energy as a single auxiliary cold and heat source. The invention mainly aims at the problems existing in the traditional water-loop heat pump system which can meet the requirements of heat supply and refrigeration of a building at the same time, namely the system needs to be provided with auxiliary heating and refrigeration devices such as a cooling tower, a boiler and the like, which is contrary to the graded utilization of energy, seriously wastes high-level energy and causes equipment complication, and in addition, a user side adopts a unit type unit, which causes great difference of working condition change of the user side and increases the control difficulty of the system. The air conditioning system mainly comprises a geothermal energy tail end system, a closed circulating water system, a semi-centralized/split type heating and refrigerating air conditioning system, an automatic control system and the like, and fully utilizes waste heat in a building and low-grade geothermal energy. The four operation modes of the air conditioning system accord with energy grading utilization, can meet the requirements of buildings with different cold and hot load structures, and has the advantages of flexibility, wide applicability, simple structure, high torque density, strong low-speed high-torque direct driving capability, small output torque fluctuation and high power factor.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.
Claims (6)
1. A water loop heat pump type air conditioning system taking geothermal energy as a single auxiliary cold and heat source is characterized by comprising a ground source end system, a user end air conditioning system communicated with the ground source end system, a closed circulating water system for receiving heat discharge and heat absorption of the user end air conditioning system and an automatic control system for controlling the ground source end and the user end air conditioning system;
the ground source end system comprises a compressor (1), a four-way valve (2), a gas-liquid separator (3) and a function switching area (12) consisting of a water-water heat exchanger (4), an evaporation heat exchanger (5), a condensation heat exchanger (6), an expansion valve (7), a first valve (8), a second valve (9), a third valve (10) and a fourth valve (11);
the user side air conditioning system comprises a heat supply side heat exchanger (13) and a refrigeration side heat exchanger (14);
the closed circulating water system is a circulating water system for receiving heat discharge and heat absorption of a water-water heat exchanger (4), an evaporation heat exchanger (5), a heat exchanger (13) at a heat supply end of a terminal user and a heat exchanger (14) at a refrigeration end, and a temperature sensor (15) is arranged in the closed circulating water system for controlling the temperature of circulating water;
the automatic control system comprises a temperature sensor (15), a control panel and a control program circuit board; wherein,
an outlet of the compressor (1) is connected with a first port of the four-way valve (2), a second port of the four-way valve (2) is connected with an inlet of the gas-liquid separator (3), and an outlet of the gas-liquid separator (3) is connected with an inlet of the compressor (1);
a third port and a fourth port of the four-way valve (2) are respectively connected with an evaporation heat exchanger (5) and a condensation heat exchanger (6), and the evaporation heat exchanger (5) is connected with the condensation heat exchanger (6) through an expansion valve (7); the outlet end of the circulating water of the evaporation heat exchanger (5) is connected with the heat supply end heat exchanger (13) and the refrigeration end heat exchanger (14) and returns to the evaporation heat exchanger (5) through a second valve (9);
the ground source end circulating water is connected with the water-water heat exchanger (4) through a third valve (10) and is connected with the condensing heat exchanger (6) through a fourth valve (10);
the user side of the water-water heat exchanger (4) is respectively connected with the heat supply end heat exchanger (13) and the refrigeration end heat exchanger (14) through a first valve (8) to receive heat absorption and heat release of the user side;
a temperature probe of the temperature sensor (15) is connected into the closed circulating water system and is arranged in an upstream main pipe area of inlets of the heat supply end heat exchanger (13) and the refrigeration end heat exchanger (14), so that the probe end of the temperature sensor (15) monitors the water temperature after heat exchange with soil at a user end of the water-water heat exchanger (4) during function switching.
2. A water loop heat pump type air conditioning system using geothermal energy as a single auxiliary cold and heat source as claimed in claim 1, wherein the heat exchange working mediums in the evaporation heat exchanger (5) and the condensation heat exchanger (6) are respectively circulating water and a refrigeration working medium, and the heat exchange working medium in the water-water heat exchanger (4) is circulating water at one end and circulating water at the ground source end at the other end.
3. A water loop heat pump type air conditioning system using geothermal energy as a single auxiliary cold and heat source according to claim 1, wherein the water-water heat exchanger (4) is a plate heat exchanger, and the evaporating heat exchanger (5) and the condensing heat exchanger (6) are plate and double-pipe heat exchangers.
4. A water loop heat pump type air conditioning system using geothermal energy as a single auxiliary cold and heat source as claimed in claim 1, wherein the ground source end heat extraction mode is vertical pipe laying or horizontal pipe laying.
5. A water loop heat pump type air conditioning system using geothermal energy as a single auxiliary cold and heat source as claimed in claim 1, wherein the user side air conditioning system is a single user refrigeration unit in a conventional water loop heat pump system, or a semi-centralized air conditioning unit which is divided into two according to user requirements and has separate cooling and heating functions.
6. A water loop heat pump type air conditioning system using geothermal energy as a single auxiliary cold and heat source as claimed in claim 5, wherein the semi-centralized air conditioning unit is an air-cooled air conditioner or a multi-split variable frequency air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177333.2A CN102679484B (en) | 2012-05-31 | 2012-05-31 | Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177333.2A CN102679484B (en) | 2012-05-31 | 2012-05-31 | Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102679484A true CN102679484A (en) | 2012-09-19 |
| CN102679484B CN102679484B (en) | 2014-07-09 |
Family
ID=46811792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210177333.2A Expired - Fee Related CN102679484B (en) | 2012-05-31 | 2012-05-31 | Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102679484B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836777A (en) * | 2014-03-28 | 2014-06-04 | 庄春龙 | Pipeline control structure for hybrid ground source heat pump |
| CN109764572A (en) * | 2019-01-23 | 2019-05-17 | 李社红 | A kind of heat pump unit and the air-conditioning system with it |
| CN112081721A (en) * | 2020-08-24 | 2020-12-15 | 江苏财经职业技术学院 | Liquid-cooled wind generating set and temperature control system thereof |
| CN112303827A (en) * | 2020-10-30 | 2021-02-02 | 青岛海尔空调电子有限公司 | Control method of combined air-conditioning system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421663A (en) * | 2002-12-25 | 2003-06-04 | 上海交通大学 | Central air conditioning system at terminal of geothermal heat pump radiation |
| JP2005098543A (en) * | 2003-09-22 | 2005-04-14 | Asahi Kasei Homes Kk | Heat using device for air conditioning |
| CN1769817A (en) * | 2004-10-26 | 2006-05-10 | 徐生恒 | Heat pump for extracting soil energy |
| CN201318759Y (en) * | 2008-03-28 | 2009-09-30 | 王翠平 | Non-compressor non-energy-consumption refrigeration energy-saving device for geothermal-energy thermal pump central air conditioner |
| CN201531964U (en) * | 2009-11-20 | 2010-07-21 | 上海建冶科技工程股份有限公司 | Water circulation ground-source air-conditioning system |
| CN202008202U (en) * | 2010-12-17 | 2011-10-12 | 姜衍礼 | Cold-hot air conditioning system for direct sewage and earth surface water source heat pump |
| KR101179032B1 (en) * | 2006-12-08 | 2012-08-31 | 엘지전자 주식회사 | Air conditioner using of the subterranean heat and water heater system |
| CN202747504U (en) * | 2012-05-31 | 2013-02-20 | 东南大学 | Water-loop heat pump type air-conditioning device adopting geothermal energy as single auxiliary cold and heat source |
-
2012
- 2012-05-31 CN CN201210177333.2A patent/CN102679484B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421663A (en) * | 2002-12-25 | 2003-06-04 | 上海交通大学 | Central air conditioning system at terminal of geothermal heat pump radiation |
| JP2005098543A (en) * | 2003-09-22 | 2005-04-14 | Asahi Kasei Homes Kk | Heat using device for air conditioning |
| CN1769817A (en) * | 2004-10-26 | 2006-05-10 | 徐生恒 | Heat pump for extracting soil energy |
| KR101179032B1 (en) * | 2006-12-08 | 2012-08-31 | 엘지전자 주식회사 | Air conditioner using of the subterranean heat and water heater system |
| CN201318759Y (en) * | 2008-03-28 | 2009-09-30 | 王翠平 | Non-compressor non-energy-consumption refrigeration energy-saving device for geothermal-energy thermal pump central air conditioner |
| CN201531964U (en) * | 2009-11-20 | 2010-07-21 | 上海建冶科技工程股份有限公司 | Water circulation ground-source air-conditioning system |
| CN202008202U (en) * | 2010-12-17 | 2011-10-12 | 姜衍礼 | Cold-hot air conditioning system for direct sewage and earth surface water source heat pump |
| CN202747504U (en) * | 2012-05-31 | 2013-02-20 | 东南大学 | Water-loop heat pump type air-conditioning device adopting geothermal energy as single auxiliary cold and heat source |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836777A (en) * | 2014-03-28 | 2014-06-04 | 庄春龙 | Pipeline control structure for hybrid ground source heat pump |
| CN103836777B (en) * | 2014-03-28 | 2016-02-17 | 庄春龙 | Mixing type ground source heat pump pipeline control structure |
| CN109764572A (en) * | 2019-01-23 | 2019-05-17 | 李社红 | A kind of heat pump unit and the air-conditioning system with it |
| CN112081721A (en) * | 2020-08-24 | 2020-12-15 | 江苏财经职业技术学院 | Liquid-cooled wind generating set and temperature control system thereof |
| CN112081721B (en) * | 2020-08-24 | 2021-08-06 | 江苏财经职业技术学院 | Liquid-cooled wind generating set and temperature control system thereof |
| CN112303827A (en) * | 2020-10-30 | 2021-02-02 | 青岛海尔空调电子有限公司 | Control method of combined air-conditioning system |
| CN112303827B (en) * | 2020-10-30 | 2022-05-20 | 青岛海尔空调电子有限公司 | Control method of combined air-conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102679484B (en) | 2014-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204128105U (en) | Source-saving type air conditioning and water heating system | |
| CN102788392B (en) | A kind of heat pipe hot pump hybrid system | |
| WO2017219650A1 (en) | Air conditioning system, composite condenser, and operation control method and device for air conditioning system | |
| CN202204076U (en) | Heat recovery air conditioning cabinet applicable to animal room | |
| CN101216225A (en) | Double temperature cold water/cold air unit | |
| WO2022267877A1 (en) | Multi-mode water-fluorine multi-split system | |
| CN202032679U (en) | Temperature control device | |
| CN102679484B (en) | Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source | |
| CN101995067A (en) | Air conditioning system combined by indirect evaporation chiller plant and traditional mechanical refrigerating unit | |
| CN104033986A (en) | Control method of total heat recovery type foldable air conditioning unit integrating air feeding, air returning and air exhausting | |
| CN103836792B (en) | Heat pump and hot water heating combined system | |
| CN102759159A (en) | Heat pipe and heat pump composite system | |
| CN114165869A (en) | Fluorine pump system and control method thereof | |
| CN103868281B (en) | A kind of single/double stage compresses switchable tri-generation system of ground-source heat pump | |
| CN202747504U (en) | Water-loop heat pump type air-conditioning device adopting geothermal energy as single auxiliary cold and heat source | |
| CN109357427B (en) | Combined air conditioning system for machine room and hot water system and control method thereof | |
| CN202675513U (en) | Heat pipe and heat pump combined system | |
| CN201731579U (en) | Air conditioner with rational utilization of waste heat | |
| CN203404923U (en) | Total-heat-recovery-type folding air sending-returning-discharging-integrated air conditioning unit | |
| CN102734878A (en) | High-efficiency dual-temperature air source heat pump assembly dedicated to capillary radiation air-conditioning system | |
| CN104596151A (en) | Heat pump host | |
| CN104214864A (en) | Energy-saving air conditioner hot water system | |
| CN110617591A (en) | Intelligent vortex injection energy-saving air conditioner | |
| CN204478349U (en) | Total heat recovery independent temperature-humidity control earth source heat pump unit | |
| CN202675517U (en) | Heat pipe and heat pump combined system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20170531 |