CN102393049B - Ground-source heat-pipe/heat-pump air conditioner - Google Patents

Ground-source heat-pipe/heat-pump air conditioner Download PDF

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CN102393049B
CN102393049B CN 201110309088 CN201110309088A CN102393049B CN 102393049 B CN102393049 B CN 102393049B CN 201110309088 CN201110309088 CN 201110309088 CN 201110309088 A CN201110309088 A CN 201110309088A CN 102393049 B CN102393049 B CN 102393049B
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heat
ground
underground
heat exchanger
pipe
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CN102393049A (en
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祝长宇
丁式平
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Beijing Deneng Hengxin Technology Co Ltd
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Beijing Deneng Hengxin Technology Co Ltd
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Abstract

The invention provides a ground-source heat-pipe/heat-pump air conditioner which is composed of an underground heat exchanger, an overground heat exchanger, a gas loop, a liquid loop and a control system, wherein the underground heat exchanger is embedded into an underground invariable-temperature stratum, when the air conditioner is running, an operation of heat exchange is performed between the underground heat exchanger and the underground invariable-temperature stratum so as to realize the air refrigerating or heating function of the air conditioner. The ground-source heat-pipe/heat-pump air conditioner has four running modes, namely, a heat-pump refrigerating mode, a heat-pipe refrigerating mode, a heat-pump heating mode and a heat-pipe heating mode, therefore, the ground-source heat-pipe/heat-pump air conditioner is an ideal energy-saving air conditioning system.

Description

A kind of ground source heat pipe heat pump air conditioner
Technical field
The present invention provides a kind of ground source heat pipe heat pump air conditioner, belongs to mechanical engineering field, particularly belongs to the refrigeration associating air-conditioning system F25B field that heats.
Background technology
Air source heat pump air-conditioner is most widely used, air-conditioning system that technology is the most ripe at present.Its advantage be cheap, install easy, easy to use.Its shortcoming is lower at cold district heating efficiency in winter, can't substitute heating system.
Geothermal heat pump air-conditioner is a kind of energy-saving air conditioning system that new development is got up.Its advantage is energy-efficient, has both adapted to the refrigeration cool-down in summer, is suitable for again and heats heating winter.Its shortcoming is system complex, cost height, difficulty is installed that only be suitable for whole residential quarter and install, inapplicable single family installs.
The under ground portion of geothermal heat pump air-conditioner just is equivalent to the outer machine part of conventional heat pump air-conditioning, the soil of underground certain depth (underground water) temperature changes very little with atmospheric temperature, remain essentially in 13 ℃ ~ 15 ℃, this just need not consider the temperature difference problem that traditional air-conditioner outdoor unit must be considered, can take full advantage of source, ground energy.Earth source heat pump is with the energy of source, ground energy (soil, underground water, surface water, low temperature geothermal water) as heat pump type air conditioning system, realizes can warming oneself the economizing type energy that can lower the temperature summer winter.It is a kind of effective way that can replace the conventional heat pump air-conditioning.
Earth-source hot-pump system mainly is made up of three kinds of parts: outdoor heat pump, source pump and indoor temperature control end equipment.Earth-source hot-pump system can be divided into soil buried tube type, underground ability of swimming and face of land ability of swimming according to the difference of its outdoor earth-source hot-pump system.
Soil buried tube type heat pump has soil coupling geothermal heat exchanger, or level is installed in the trench, or is vertically mounted in the vertical shaft with the U-shaped tubulose, and the degree of depth reaches below the thermostat layer of the face of land.As heat carrier, realize winter heat-obtaining summer refrigeration thereby in heat exchanger, circulate by intermediate medium (water of water or adding antifreezing agent).The weak point of this system is to need large-scale circulating pump that thermal medium is sent in the ground heat exchanger, and power consumption is very big; And this system only is suitable for the indoor temperature control of building (as whole residential building, building etc.), just wastes energy very much concerning single middle-size and small-size user.
Ground water regime is by the construction gang of wells that draws water, and underground water is extracted out, by secondary heat exchange or directly deliver to the water resource heat pump group, after extracting heat or release heat, sends back to underground.Weak point is to need groundwater abstraction, forms floor drain easily, has not only destroyed ground water regime, also may cause surface collapse, and structure foundation is had certain threat, and this system is out of use in the place of lack of water.
The underground water heat exchanger that the surface water heat pump system is made up of the plastic tube of the multiple parallel connection below the potential water surface, replaced ground heat exchanger, they are connected in the temperature-controlling system in the building, owing to be to utilize nature water as the temperature control energy, need antifreeze processing at northern area.Shortcoming is to be subjected to the region restriction, can only be could use near the place at water source very much.
Summary of the invention
In order to overcome the deficiency that family expenses general expression heat pump type air conditioning system must defrost, and the shortcoming that existing various ground source heats can air-conditionings at present, the object of the present invention is to provide the mating type earth source air conditioner that a kind of existing heat pump air conditioner and ground source heat can air-conditioning.
This air-conditioning system utilizes heat pipe to extract energy from underground thermostat layer, the outdoor machine part that does not need the conventional heat pump air-conditioning, and be to use the earth source air conditioner technology, adopt underground heat pipe section to substitute the off-premises station of heat pump air conditioner, so not only the outdoor fan of traditional air-conditioning institute power consumption source is saved, but also solved a large amount of energy consumption problems that must defrost when heating winter.
The technical solution adopted in the present invention is as follows:
A kind of ground source heat pipe heat pump air conditioner is characterized in that, it is made of subterranean heat exchanger, ground heat exchanger, gas return path, fluid loop and control system five parts; Described subterranean heat exchanger is by underground heat pipe, auxiliary heat-conductive assembly, underground catheter, auxiliary drain assembly and ground downtake constitute, be provided with the ground downtake in the underground heat pipe, be provided with underground catheter in the ground downtake, underground heat pipe locates below ground level, it is open that ground downtake one end seals an end, one end of ground downtake sealing stretches into underground heat pipe inner bottom part, the ground open end of downtake elevates above the soil, underground catheter two ends all open and wherein an end stretch into ground downtake inner bottom part and the other end elevates above the soil, underground heat pipe is imbedded underground thermostat layer, can follow underground thermostat layer generation heat exchange; Described ground level heat interchanger is made of heat pipe, aluminium foil fins set and heat exchange fan, and heat pipe comprises many heat pipe arms parallel with one another, and heat pipe top connects wireway, and the heat pipe lower end connects catheter; Described gas return path is by main gas tube, gas circuit triple valve, compressor branch road and compressor bypass branch road constitute up and down, the compressor branch road comprises compressor, temperature-sensitive bag, gas-liquid separator, oil-filtering apparatus and commutation cross valve, and main gas tube connects the wireway of ground heat exchanger and the wireway of subterranean heat exchanger respectively up and down; Fluid loop is by main catheter, liquid pump, liquid pump triple valve, liquid pump bypass branch road, orifice union, throttling triple valve, throttling bypass branch road and fluid reservoir constitute up and down, orifice union comprises two expansion valves, two devices for drying and filtering and two check valves, and main catheter connects the catheter of ground heat exchanger and the catheter of subterranean heat exchanger respectively up and down; Subterranean heat exchanger, gas return path, ground heat exchanger, fluid loop constitute the closed cryogenic cycles loop jointly, are filled with cold-producing medium in the loop; Control system by sensor, control chip, manually and remote input units, display unit, electronic switch constitute, sensor comprises a plurality of temperature sensors, a plurality of pressure sensor and a plurality of liquid level sensor, compressor, liquid pump, heat exchange fan and each magnetic valve are all to there being electronic switch, control chip is controlled electronic switch according to artificial input instruction and sensor parameters, thus the mode of operation of control air-conditioning.
Heat pipe and the wireway of the above subterranean heat exchanger are thicker, catheter is arranged on the inside of heat pipe and wireway, and be called troposphere (some changes being arranged with the region varying depth) about subsurface 0m ~ 7m, change along with the variation of atmospheric temperature at this aspect soil moisture, and the following soil layer of 7m is because smaller with the atmospheric temperature variable effect, basically all at 13 ℃ ~ 15 ℃, be called thermostat layer the whole year.The underground heat pipe degree of depth of described this temperature-controlling system should reach underground thermostat layer, reach landfill heat-conducting medium behind the peripheral edge cover of the heat pipe heat transmission fin of underground thermostat layer in the degree of depth, be in the adiabatic medium of the peripheral landfill of underground heat pipe of face of land troposphere, the agent of the inner placement of underground heat pipe liquid condensation, can guarantee that like this liquid condensation agent in heat absorption (heat release) ability of thick conduit bottom, has also reduced the condensing agent energy loss that cooling (heat absorption) causes in rising or decline process.
The above subterranean heat exchanger can directly be imbedded underground thermostat layer, also can increase an aid in heat transfer pipe; The diameter of aid in heat transfer Guan Weiyi buried lower end sealing is full of water or heat-conducting liquid greater than metal or the plastic tube of subterranean heat exchanger in the pipe, subterranean heat exchanger is inserted in the aid in heat transfer pipe.
The above liquid pump can be arranged on the lower end of subterranean heat exchanger, also can be arranged on the ground; When liquid pump is arranged on the lower end of subterranean heat exchanger, need increase the servicing unit liquid pump and just can extrude ground to liquid refrigerant; When liquid pump was arranged on the ground, the interior pressure of underground catheter needed to increase the evaporation boiling that the cold-producing medium supercooling apparatus just can be avoided the liquid refrigerant in the underground catheter less than the interior pressure of underground heat pipe, and underground catheter is outer simultaneously will establish heat insulation layer; Supercooling apparatus is made of capillary, supercooling tube road, sub-cooling coil and mistake cold compressor, sub-cooling coil is placed on the underground heat pipe bottom of subterranean heat exchanger, cross cold compressor and be installed in ground, one end of sub-cooling coil is installed the throttling arrangement capillary, the other end connected cold compressor by the supercooling tube road, the sub-cooling coil lower end is directly immersed refrigerating fluid and refrigerating fluid is cooled off, and makes its subcritical temperature reach supercooled state.
The above subterranean heat exchanger can be independently one, also can be that a plurality of subterranean heat exchangers compose in parallel a big subterranean heat exchanger.
The above ground heat exchanger can be independently one, also can be the heat exchanger parallel connection of a plurality of grounds, thereby form a central air conditioner system.
The above ground source heat pipe heat pump air conditioner has that heat pump refrigerating, heat-pipe refrigerating, heat pump heat, heat pipe heats four kinds of mode of operations.
The present invention compares this air-conditioning system of common geothermal heat pump air-conditioner does not need large-scale circulating pump to drive the circulation back and forth of a large amount of heat transferring mediums, and such and existing geothermal heat pump air-conditioner is compared and saved power consumption; And the working media that adopts in the heat pipe does not have corrosivity to underground heat pipe, and heat pipe can use for a long time under the old place; Shortcomings such as source heat pump system underground heat exchange pipe is long routinely, the refrigerating medium flow resistance is bigger have been overcome simultaneously; Whole underground system is the hermetic type space in addition, do not worry condensing agent leak outside and to underground soil and phreatic harm, health environment-friendly; Because what take place in heat pipe is gas--liquid phase conversion heat, its heat flow density is far above the heat flow density of descending single-phase heat exchange in the heat exchanger tube routinely, this has also just determined need not very big underground system, controllably descend heat pipe cross-sectional area and the degree of depth according to demand, so just can satisfy large, medium and small different user demands, thereby improved heat exchange efficiency again, saved the energy indirectly.
When indoor temperature need improve, this air-conditioning system can provide two kinds of heating modes:
First kind is that the heat pipe energy-saving formula heats work.After opening this kind mode of operation, utilize central control system control gas circuit triple valve, liquid pump triple valve and throttling triple valve to make compressor branch road, liquid pump and orifice union be in off state, and compressor bypass branch road, liquid pump bypass branch road and the conducting of throttling bypass branch road.The liquid condensation agent becomes gaseous state at underground absorption heat in the subterranean heat exchanger, be raised to gas return path in nature by gas self, enter in the wireway of ground heat exchanger through gas circuit triple valve and compressor bypass branch road, be distributed to then in each heat pipe arm, assisting down of heat exchange fan, the gaseous state condensing agent improves indoor temperature by the many vertical heat pipe arm heat radiations of parallel connection, gaseous state condensing agent liquefy after the heat radiation, the liquid condensation agent falls into the catheter of heat exchanger on the ground by the self gravitation effect, flow out by catheter again, enter fluid loop, pass through fluid reservoir respectively, throttling bypass branch road, the throttling triple valve, liquid pump bypass branch road and liquid pump triple valve enter in the subterranean heat exchanger, the liquid condensation agent falls into underground heat pipe bottom by the catheter of subterranean heat exchanger, and the thermal cycle of energy-saving type heat control is finished like this.
Second kind of heat-pump-type warming operation.When indoor temperature also need improve, can open this kind mode of operation, utilize central control system control gas circuit triple valve, liquid pump triple valve and throttling triple valve to make compressor branch road, liquid pump bypass branch road and choke valve assembly be in channel status, compressor bypass branch road, liquid pump, throttling bypass branch road are in off state.Utilize control system to change compressor annex cross valve outgassing direction, compressor strengthens gaseous state condensing agent pressure and temperature, gaseous state condensing agent through the temperature raising pressurization enters heat exchanger on the ground, assisting down of aluminium foil fins set and heat exchange fan, improve indoor temperature by the many vertical heat pipe arm heat radiations of parallel connection, gaseous state condensing agent liquefy after the heat radiation, the liquid condensation agent falls into the catheter of heat exchanger on the ground by the self gravitation effect, flow into fluid loop by catheter again, through fluid reservoir, behind check valve and the Filter dryer in the throttling of expansion valve place, the throttling triple valve of flowing through then, enter subterranean heat exchanger behind liquid pump bypass branch road and the liquid pump triple valve, catheter from subterranean heat exchanger flows back to the underground heat pipe again, and the liquid condensation agent is absorbed heat in underground heat pipe and become gaseous state and enter next time circulation.
Under this duty that heats for environment, condensing agent liquid level in the heat exchanger is realized control automatically by the fluid level controller in the fluid reservoir and central control system on the ground, liquid level is in the catheter of ground heat exchanger always, namely expire the gas duty, and the control of the liquid condensation agent liquid level in the underground heat pipe is more than thermostat layer, so not only can increase the contact area of liquid condensation agent and underground thermostat layer, improve the heat absorption rate of condensing agent, but also increase the heat dissipation region of gaseous state condensing agent in the heat exchanger of ground.
When indoor temperature need reduce, this air-conditioning can provide two kinds of cooling methods:
First kind is energy-saving heat-pipe refrigerating work.After opening this kind mode of operation, utilize central control system control gas circuit triple valve, liquid pump triple valve and throttling triple valve to make compressor branch road, liquid pump bypass branch road and orifice union be in off state, compressor bypass branch road, liquid pump and throttling bypass branch road are in channel status.The liquid condensation agent that the power that provides by liquid pump in the fluid loop drives in the subterranean heat exchanger is flowed earthward by underground catheter, through the liquid pump triple valve, liquid pump, the throttling triple valve, enter the catheter of heat exchanger on the ground behind throttling bypass branch road and the fluid reservoir, be distributed to then in each heat pipe arm, the liquid condensation agent in each heat pipe arm in the absorption chamber heat become gaseous state, and the condensing agent that becomes gaseous state after the heat absorption by the liquid condensation agent constantly under the pressure-driven that constantly expands of the mobile power that provides and gas self to underground movement, enter in the underground heat pipe through compressor bypass branch road and gas circuit triple valve, the gaseous state condensing agent becomes the liquid condensation agent again again by underground heat pipe heat radiation cooling and falls into underground heat pipe bottom, enters circulation next time.
Second kind is the heat pump type refrigerating pattern.Under the too high situation of indoor consumed power, can open this kind mode of operation, utilize central control system control gas circuit triple valve, liquid pump triple valve and throttling triple valve to make compressor branch road, liquid pump bypass branch road and orifice union be in channel status, compressor bypass branch road, liquid pump and throttling bypass branch road are in off state.Utilize control system to change the outgassing direction of compressor annex cross valve, compressor in the gas return path drives the gaseous state condensing agent and moves to underground heat pipe, the high-temperature gas condensing agent is at the underground thermostat layer liquefy condensing agent that is cooled, and the liquid condensation agent is risen under the pressure that compressor provides, through the liquid pump triple valve, liquid pump bypass branch road, the throttling triple valve, behind check valve and the device for drying and filtering, temperature information according to the transmission of temperature-sensitive bag, the liquid condensation agent is carried out entering heat exchanger on the ground after the suitable throttling in expansion valve, heat in the absorption chamber when liquid condensation agent is vaporized in the heat pipe arm of ground heat exchanger, thereby regulation and control indoor temperature.
This be under the environment refrigeration work state, condensing agent liquid level in the heat exchanger is realized control automatically by the fluid level controller in the fluid reservoir and central control system on the ground, liquid level is in the heat exchanger wireway of ground always, namely expire the liquid duty, most of condensing agent is all in each arm of heat pipe, and the residue of the liquid condensation agent in underground seldom, so not only can increase liquid condensation agent endotherm area in the indoor heat exchanger, but also increase the contact area of underground gaseous state condensing agent and underground thermostat layer, strengthen radiating efficiency.
In heat pipe-type refrigeration work process, if because working environment is too high the liquid condensation agent is gasified before throttling, can adopt two kinds of methods to solve.First kind is liquid pump to be changed into the underground waterproof liquid pump be installed in underground, coupling cock that also has with the parallel connection of underground waterproof liquid pump, namely coupling cock is closed when the waterproof liquid pump is worked, coupling cock is opened when the waterproof liquid pump stops, the pressure drop that this mode has produced in catheter when just having solved and having carried liquid refrigerant because of liquid pump on ground; Another kind of solution is that supercooling apparatus is installed in subterranean heat exchanger, supercooling apparatus is by capillary, the supercooling tube road, sub-cooling coil and mistake cold compressor constitute, sub-cooling coil is placed on subterranean heat exchanger heat pipe bottom, cross cold compressor and be installed in ground, one end of sub-cooling coil is installed the throttling arrangement capillary, the other end connects compressor by the supercooling tube road, gas return path is inserted in the exit of compressor, so just formed a miniature condenser, and the liquid pump in compressor and the fluid loop is controlled same Qi Tongting by central control system, prevents that the liquid condensation agent from gasifying before throttling.
The temperature detection part of central control system can sensing chamber in variation of temperature, thereby from four kinds of work systems, select needed duty automatically, finish Automatic Control, also can be as the criterion to satisfy user's needs by controlling to adjust duty manually.
Description of drawings
Figure one implements figure for the overall structure of ground source heat pipe heat pump air conditioner of the present invention.
Figure two is structure enlarged drawings of described air-conditioning subterranean heat exchanger.
Figure three is described air-conditioning structure enlarged drawings of heat exchanger on the ground.
Figure four is described air-conditioning gas return path enlarged drawings.
Figure five is described air-conditioning fluid loop enlarged drawings.
Figure six is orifice union enlarged drawings in the described air-conditioning fluid loop.
Figure seven is that the heat pipe energy-saving formula heats working cycle diagram.
Figure eight is that heat-pump-type heats working cycle diagram.
Figure nine is heat pipe energy-saving formula refrigeration work circular charts.
Figure ten is heat pump type refrigerating working cycle diagrams.
Figure 11 is that liquid pump is installed in structure enforcement figure when underground.
Figure 12 is structure enforcement figure that subterranean heat exchanger is installed supercooling apparatus.
Figure 13 is enforcement figure that subterranean heat exchanger is installed shell.
The icon note:
(100), subterranean heat exchanger; (200), ground heat exchanger; (300), gas return path; (400), fluid loop; (1), face of land troposphere; (2), underground thermostat layer; (101), underground heat pipe; (102), adiabatic medium; (103), heat-conducting medium; (104), heat transmission fin; (105), catheter heat insulation layer; (106), underground catheter; (107), downtake; (108), aid in heat transfer pipe; (109), water (heat-conducting liquid); (110), underground waterproof liquid pump; (111), coupling cock; (201), heat pipe; (202), wireway; (203), catheter; (204), aluminium foil fins set; (205), heat exchange fan; (206), liquid level position; (301), gas circuit triple valve; (302), compressor bypass branch road; (303), compressor branch road; (304), bottom main gas tube; (305), top main gas tube; (331), compressor; (332), cross valve; (333), temperature-sensitive bag; (334), gas-liquid separator; (401), liquid pump triple valve; (402), liquid pump; (403), liquid pump bypass branch road; (404), throttling triple valve; (405), orifice union; (406), throttling bypass branch road; (407), fluid reservoir; (408), top master catheter; (409), bottom master catheter; (451), check valve; (452), device for drying and filtering; (453), expansion valve; (454), expansion valve; (455), device for drying and filtering; (456), check valve; (501), capillary; (502), supercooling tube; (503), sub-cooling coil; (504), cross cold compressor.
Implementation method
When indoor temperature need improve, this air-conditioning system can provide two kinds of heating modes:
First kind is that the heat pipe energy-saving formula heats work, shown in figure seven.After opening this kind mode of operation, utilize central control system control gas circuit triple valve (301), liquid pump triple valve (401) and throttling triple valve (404) to make compressor branch road (303), liquid pump (402) and orifice union (405) be in off state, and compressor bypass branch road (302), liquid pump bypass branch road (403) and throttling bypass branch road (406) conducting.The liquid condensation agent becomes gaseous state at underground absorption heat in the subterranean heat exchanger (100), be raised to gas return path (300) in nature by gas self, enter in the wireway (202) of ground heat exchanger (200) through gas circuit triple valve (301) and compressor bypass branch road (302), be distributed to then in each heat pipe arm (201), assisting down of aluminium foil fins set (204) and heat exchange fan (205), the gaseous state condensing agent improves indoor temperature by many vertical heat pipe arm (201) heat radiations of parallel connection, gaseous state condensing agent liquefy after the heat radiation, the liquid condensation agent falls into the catheter (203) of heat exchanger (200) on the ground by the self gravitation effect, flow out by catheter (203) again, enter fluid loop (400), pass through fluid reservoir (407) respectively, throttling bypass branch road (406), throttling triple valve (404), liquid pump bypass branch road (403) and liquid pump triple valve (401) enter in the subterranean heat exchanger (100), the liquid condensation agent falls into underground heat pipe (101) bottom by the catheter (106) of subterranean heat exchanger (100), and the thermal cycle of energy-saving type heat control is finished like this.
Second kind of heat-pump-type warming operation is shown in figure eight.When indoor temperature also need improve, can open this kind mode of operation, utilize central control system control gas circuit triple valve (301), liquid pump triple valve (401) and throttling triple valve (404) to make compressor branch road (303), liquid pump bypass branch road (403) and choke valve assembly (405) be in channel status, compressor bypass branch road (302), liquid pump (402), throttling bypass branch road (406) are in off state.Utilize control system to change compressor (331) annex cross valve (332) outgassing direction, compressor (331) strengthens gaseous state condensing agent pressure and temperature, gaseous state condensing agent through the temperature raising pressurization enters heat exchanger (200) on the ground, assisting down of aluminium foil fins set (204) and heat exchange fan (205), improve indoor temperature by many vertical heat pipe arm (201) heat radiations of parallel connection, gaseous state condensing agent liquefy after the heat radiation, the liquid condensation agent falls into the catheter (203) of heat exchanger (200) on the ground by the self gravitation effect, flow into fluid loop (400) by catheter (203) again, through fluid reservoir (407), throttling is located at expansion valve (453) in check valve (451) and Filter dryer (452) back, the throttling triple valve (404) of flowing through then, enter subterranean heat exchanger (100) behind liquid pump bypass branch road (403) and the liquid pump triple valve (401), catheter (106) from subterranean heat exchanger (100) flows back to the underground heat pipe (101) again, and the liquid condensation agent is absorbed heat in underground heat pipe (101) and become gaseous state and enter next time circulation.
Under this duty that heats for environment, condensing agent liquid level (206) in the heat exchanger is realized control automatically by the fluid level controller in the fluid reservoir (407) and central control system on the ground, liquid level is in the catheter (203) of ground heat exchanger (200) always, namely expire the gas duty, and the control of the liquid condensation agent liquid level in the underground heat pipe (101) is more than thermostat layer (2), so not only can increase the contact area of liquid condensation agent and underground thermostat layer (2), improve the heat absorption rate of condensing agent, but also increase the heat dissipation region of the middle gaseous state condensing agent of heat exchanger (200) on the ground.
When indoor temperature need reduce, this air-conditioning can provide two kinds of cooling methods:
First kind is energy-saving heat-pipe refrigerating work, shown in figure nine.After opening this kind mode of operation, utilize central control system control gas circuit triple valve (301), liquid pump triple valve (401) and throttling triple valve (404) to make compressor branch road (303), liquid pump bypass branch road (403) and orifice union (405) be in off state, compressor bypass branch road (302), liquid pump (402) and throttling bypass branch road (406) are in channel status.The liquid condensation agent that the power that provides by liquid pump (402) in the fluid loop (400) drives in the subterranean heat exchanger (100) is flowed earthward by underground catheter (106), through liquid pump triple valve (401), liquid pump (402), throttling triple valve (404), enter the catheter (203) of heat exchanger (200) on the ground behind throttling bypass branch road (406) and the fluid reservoir (407), be distributed to then in each heat pipe arm (201), the liquid condensation agent in each heat pipe arm (201) in the absorption chamber heat become gaseous state, and the condensing agent that becomes gaseous state after the heat absorption by the liquid condensation agent constantly under the pressure-driven that constantly expands of the mobile power that provides and gas self to underground movement, enter in the underground heat pipe (101) through compressor bypass branch road (302) and gas circuit triple valve (301), the gaseous state condensing agent becomes the liquid condensation agent again again by underground heat pipe (101) heat radiation cooling and falls into underground heat pipe (101) bottom, enters circulation next time.
Second kind is the heat pump type refrigerating pattern, shown in figure ten.Under the too high situation of indoor consumed power, can open this kind mode of operation, utilize central control system control gas circuit triple valve (301), liquid pump triple valve (401) and throttling triple valve (404) to make compressor branch road (303), liquid pump bypass branch road (403) and orifice union (405) be in channel status, compressor bypass branch road (302), liquid pump (402) and throttling bypass branch road (406) are in off state.Utilize control system to change the outgassing direction of compressor (331) annex cross valve (332), compressor (331) in the gas return path (300) drives the gaseous state condensing agent and moves to underground heat pipe (201), the high-temperature gas condensing agent is at underground thermostat layer (2) the liquefy condensing agent that is cooled, and the liquid condensation agent is risen under the pressure that compressor (331) provides, through liquid pump triple valve (401), liquid pump bypass branch road (403), throttling triple valve (404), behind check valve (456) and the device for drying and filtering (455), temperature information according to temperature-sensitive bag (333) transmission, carrying out suitable throttling in expansion valve (454) after, the liquid condensation agent enters heat exchanger (200) on the ground, the liquid condensation agent is heat in absorption chamber during vaporization in the heat pipe arm (201) of heat exchanger (200) on the ground, thus the regulation and control indoor temperature.
This be under the environment refrigeration work state, condensing agent liquid level (206) in the heat exchanger is realized control automatically by the fluid level controller in the fluid reservoir (407) and central control system on the ground, liquid level is in the wireway (202) of ground heat exchanger (200) always, namely expire the liquid duty, most of condensing agent is all in each arm of heat pipe (201), and the liquid condensation agent of underground heat pipe (101) remains seldom in the subterranean heat exchanger (100), so not only can increase the middle liquid condensation agent endotherm area of heat exchanger (200) on the ground, but also increase the contact area of underground gaseous state condensing agent and underground thermostat layer (2), strengthen radiating efficiency.
In heat pipe-type refrigeration work process, if because working environment is too high the liquid condensation agent is gasified before throttling, can adopt two kinds of methods to solve.First kind is liquid pump (402) to be changed into underground waterproof liquid pump (110) be installed in underground, shown in figure 11, an in addition coupling cock (111) in parallel with underground waterproof liquid pump (110), namely coupling cock (111) is closed when waterproof liquid pump (110) is worked, when waterproof liquid pump (110) when stopping coupling cock (111) open the pressure drop of generation catheter (106) in when this mode has just solved and has been placed on ground and carries liquid refrigerant because of liquid pump (402); Another kind of solution is that supercooling apparatus is installed in subterranean heat exchanger (100), shown in figure 12, supercooling apparatus is by capillary (501), supercooling tube road (502), sub-cooling coil (503) and mistake cold compressor (504) are formed, sub-cooling coil (503) is placed on underground heat pipe (101) bottom of subterranean heat exchanger (100), cross cold compressor (504) and be installed in ground, one end of sub-cooling coil (503) is installed throttling arrangement capillary (501), the other end connected cold compressor (504) by supercooling tube road (502), crossing the exit of cold compressor (504) inserts on the bottom main gas tube (304) of gas return path (300), so just formed a miniature condenser, and the liquid pump of crossing in cold compressor (504) and the fluid loop (400) (402) has central control system control to stop together with rising, and prevents that the liquid condensation agent from gasifying before throttling.
Subterranean heat exchanger of the present invention (100) can directly be imbedded underground thermostat layer (2), also can increase an aid in heat transfer pipe (108), shown in figure 13; Aid in heat transfer pipe (108) is that the diameter of buried lower end sealing is greater than metal or the plastic tube of subterranean heat exchanger (100), be full of water (heat-conducting liquid) (109) in the pipe, subterranean heat exchanger (100) is inserted in the aid in heat transfer pipe (108), increased heat transfer area so at last, increased work efficiency.
The temperature detection part of central control system can sensing chamber in variation of temperature, thereby from four kinds of work systems, select needed duty automatically, finish Automatic Control, also can be as the criterion to satisfy user's needs by controlling to adjust duty manually.

Claims (7)

1. a ground source heat pipe heat pump air conditioner is characterized in that, it is made of subterranean heat exchanger, ground heat exchanger, gas return path, fluid loop and control system five parts; Described subterranean heat exchanger is by underground heat pipe, auxiliary heat-conductive assembly, underground catheter, auxiliary drain assembly and ground downtake constitute, be provided with the ground downtake in the underground heat pipe, be provided with underground catheter in the ground downtake, underground heat pipe locates below ground level, it is open that ground downtake one end seals an end, one end of ground downtake sealing stretches into underground heat pipe inner bottom part, the ground open end of downtake elevates above the soil, underground catheter two ends all open and wherein an end stretch into ground downtake inner bottom part and the other end elevates above the soil, underground heat pipe is imbedded underground thermostat layer, can follow underground thermostat layer generation heat exchange; Described ground heat exchanger is made of heat pipe, aluminium foil fins set and heat exchange fan, and heat pipe comprises many heat pipe arms parallel with one another, and heat pipe top connects wireway, and the heat pipe lower end connects catheter; Described gas return path is by main gas tube, gas circuit triple valve, compressor branch road and compressor bypass branch road constitute up and down, the compressor branch road comprises compressor, temperature-sensitive bag, gas-liquid separator, oil-filtering apparatus and commutation cross valve, and main gas tube connects the wireway of ground heat exchanger and the wireway of subterranean heat exchanger respectively up and down; Fluid loop is by main catheter, liquid pump, liquid pump triple valve, liquid pump bypass branch road, orifice union, throttling triple valve, throttling bypass branch road and fluid reservoir constitute up and down, orifice union comprises two expansion valves, two devices for drying and filtering and two check valves, and main catheter connects the catheter of ground heat exchanger and the catheter of subterranean heat exchanger respectively up and down; Subterranean heat exchanger, gas return path, ground heat exchanger, fluid loop constitute the closed cryogenic cycles loop jointly, are filled with cold-producing medium in the loop; Control system by sensor, control chip, manually and remote input units, display unit, electronic switch constitute, sensor comprises a plurality of temperature sensors, a plurality of pressure sensor and a plurality of liquid level sensor, compressor, liquid pump, heat exchange fan and each magnetic valve are all to there being electronic switch, control chip is controlled electronic switch according to artificial input instruction and sensor parameters, thus the mode of operation of control air-conditioning.
2. a kind of ground source heat pipe heat pump air conditioner according to claim 1 is characterized in that the version of described subterranean heat exchanger is; Underground heat pipe and ground downtake are thicker, and underground catheter is arranged on the inside of underground heat pipe and ground downtake.
3. a kind of ground source heat pipe heat pump air conditioner according to claim 1 and 2 is characterized in that described subterranean heat exchanger can directly be imbedded underground thermostat layer, also can increase an aid in heat transfer pipe; The diameter of aid in heat transfer Guan Weiyi buried lower end sealing is full of water or heat-conducting liquid greater than metal or the plastic tube of subterranean heat exchanger in the pipe, subterranean heat exchanger is inserted in the aid in heat transfer pipe.
4. a kind of ground source heat pipe heat pump air conditioner according to claim 1 is characterized in that described liquid pump can be arranged on the lower end of subterranean heat exchanger, also can be arranged on the ground; When liquid pump is arranged on the lower end of subterranean heat exchanger, need increase the servicing unit liquid pump and just can extrude ground to liquid refrigerant; When liquid pump was arranged on the ground, the interior pressure of underground catheter needed to increase the evaporation boiling that the cold-producing medium supercooling apparatus just can be avoided the liquid refrigerant in the underground catheter less than the interior pressure of underground heat pipe, and underground catheter is outer simultaneously will establish heat insulation layer; Supercooling apparatus is made of capillary, supercooling tube road, sub-cooling coil and mistake cold compressor, sub-cooling coil is placed on the underground heat pipe bottom of subterranean heat exchanger, cross cold compressor and be installed in ground, one end of sub-cooling coil is installed the throttling arrangement capillary, the other end connected cold compressor by the supercooling tube road, the sub-cooling coil lower end is directly immersed refrigerating fluid and refrigerating fluid is cooled off, and makes its subcritical temperature reach supercooled state.
5. a kind of ground source heat pipe heat pump air conditioner according to claim 1 is characterized in that, described subterranean heat exchanger can be independently one, also can be that a plurality of subterranean heat exchangers compose in parallel a big subterranean heat exchanger.
6. a kind of ground source heat pipe heat pump air conditioner according to claim 1 is characterized in that, described ground heat exchanger can be independently one, also can be the heat exchanger parallel connection of a plurality of grounds, thereby forms a central air conditioner system.
7. a kind of ground source heat pipe heat pump air conditioner according to claim 1 is characterized in that, this ground source heat pipe heat pump air conditioner has that heat pump refrigerating, heat-pipe refrigerating, heat pump heat, heat pipe heats four kinds of mode of operations.
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