CN108931070B - Wet film type low-temperature total heat recovery air-cooled heat pump unit - Google Patents

Wet film type low-temperature total heat recovery air-cooled heat pump unit Download PDF

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Publication number
CN108931070B
CN108931070B CN201811140758.XA CN201811140758A CN108931070B CN 108931070 B CN108931070 B CN 108931070B CN 201811140758 A CN201811140758 A CN 201811140758A CN 108931070 B CN108931070 B CN 108931070B
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air
valve
way valve
port
heat
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CN108931070A (en
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李国斌
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Hanrun United High Tech Development Beijing Co ltd
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Hanrun United High Tech Development Beijing Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Abstract

The invention discloses a wet film type low-temperature total heat recovery air-cooled heat pump unit which comprises an air-cooled heat exchanger, a wet film heat exchanger, a shell-and-tube condenser, a heat recoverer and the like. Through setting up wet film heat exchanger, can increase the area of contact of cooling water and air on the one hand, play the effect of quick cooling water, on the other hand still plays the effect of filtering cooling water, make the cooling water pass through wet film heat exchanger's cooling and filtration before letting in shell and tube condenser earlier, can alleviate shell and tube condenser's scale deposit problem from this, reduce unit operation maintenance cost, improve unit operation stability. By arranging the heat recoverer, the condensation heat of the refrigerant can be fully recovered, so that the energy consumption of a unit can be reduced, and the problem that the condensation heat is directly discharged into the atmosphere to intensify the heat island effect can be avoided. And through reasonable pipeline configuration, the heat pump unit can realize multiple modes such as refrigeration, heating, heat recovery, hot water, refrigeration defrosting, hot water defrosting and the like.

Description

Wet film type low-temperature total heat recovery air-cooled heat pump unit
Technical Field
The invention relates to the technical field of heat pumps, in particular to a wet film type low-temperature total heat recovery air-cooled heat pump unit.
Background
At present, air conditioning units are divided into: the device comprises a water cooling unit, an air cooling unit and an evaporation cooling unit.
The water cooling unit exchanges heat with the refrigerant by using the cooling water, and the cooling water and the refrigerant flow in the heat exchanger. The water cooling unit only refrigerates and does not heat.
The air cooling unit exchanges heat with the refrigerant by utilizing air. The air cooling unit can cool and heat.
The evaporative cooling unit also uses cooling water to exchange heat with a refrigerant, and is different from a water cooling mode in that the cooling water is directly sprayed on the surface of an evaporative cooling heat exchanger, and heat is taken away by using the vaporization latent heat of the water. The evaporative cooling unit can cool and has limited heat.
In the refrigeration mode, the same amount of cooling is obtained, and the energy consumption of the evaporative cooling unit is minimal. Generally, the same cooling capacity is obtained, and the evaporation cooling unit saves more than 30% of energy compared with the air cooling unit and more than 15% of energy compared with the water cooling unit.
However, the evaporation heat exchanger of the evaporation cooling unit is easy to scale, so that a chemical scale inhibitor needs to be added into cooling water in the use process, the cost is increased, corrosion leakage on the surface of the evaporation cooling heat exchanger is accelerated, and the running stability of the unit is affected.
In addition, the evaporation cooling unit takes the 'condensation heat' released by the cooling water absorbing saturated steam in the air as a heat source in the heating mode, and the heat exchange efficiency is very low, so that the evaporation cooling unit has higher energy consumption in the heating mode. And when the ambient temperature is lower than 0 ℃, the cooling water sprayed onto the surface of the evaporative cooling heat exchanger is frozen, so that normal heat exchange with a refrigeration medium cannot be generated, and the evaporative cooling unit cannot be used for heating in the area with the ambient temperature lower than 0 ℃.
In view of this, currently, the industry internal heat pump assembly is typically an air cooled assembly. The air cooling unit is less influenced by the environmental temperature in the aspect of heating, but the refrigerating energy consumption is high, and in the refrigerating mode, the condensation heat is directly dissipated into the atmosphere, so that the energy consumption of the unit can be increased, and the heat island effect can be aggravated.
From the above analysis, the air cooling unit, the water cooling unit and the evaporative cooling unit in the industry have drawbacks at present, and in view of this, how to develop a heat pump unit so as to avoid some or all of the above drawbacks is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a wet film type low temperature total heat recovery air-cooled heat pump unit, which comprises a low temperature jet enthalpy increasing compressor, a gas-liquid separator, a first one-way valve, a second one-way valve, a first electromagnetic valve, a second electromagnetic valve, a third one-way valve, a liquid storage device, a dry filter, a fourth electromagnetic valve, a first expansion valve, an economizer, a second expansion valve, a fourth one-way valve, a fifth one-way valve, a sixth electromagnetic valve, a four-way valve group, a first heat exchange part, a second heat exchange part and a heat recovery part;
the heat recovery part comprises a heat recovery device and a hot water pump for pumping hot water to the heat recovery device; the first heat exchange part comprises an indoor side heat exchanger; the second heat exchange part comprises an air-cooled heat exchanger, a fan for enabling air to flow through the surface of the air-cooled heat exchanger, a shell-and-tube condenser, a cooling water pump for pumping cooling water to the shell-and-tube condenser, a cooling water tank, a wet film heat exchanger positioned above the cooling water tank, and a spray pipe section for spraying the cooling water to the wet film heat exchanger, wherein the spray pipe section is connected with the shell-and-tube condenser;
the low-temperature jet enthalpy-increasing compressor is provided with a first refrigerant return port, a second refrigerant return port and a refrigerant outlet port; the economizer is provided with an A port and a B port which are communicated with each other, and a C port and a D port which are communicated with each other;
the refrigerant outflow port is connected with the heat recoverer through the four-way valve group; the heat recoverer is connected with the liquid reservoir through the second one-way valve, the first electromagnetic valve and the third one-way valve; the liquid reservoir is connected with the drying filter; the drying filter is connected with the port D and is also connected with the port A through the fourth electromagnetic valve and the first expansion valve; the port B is connected with the second refrigerant reflux port; the port C is connected with the indoor side heat exchanger through the second expansion valve, the fifth one-way valve and the sixth electromagnetic valve; the indoor side heat exchanger is connected with the gas-liquid separator through the four-way valve group; the gas-liquid separator is connected with the first refrigerant reflux port;
the heat recoverer is also connected with the liquid reservoir through the second one-way valve, the third electromagnetic valve and the sixth one-way valve; the port C is also connected with the air-cooled heat exchanger through the second expansion valve, the fourth one-way valve and the second electromagnetic valve; the air-cooled heat exchanger is connected with the shell-and-tube condenser; the air-cooled heat exchanger and the shell-and-tube condenser are connected with the gas-liquid separator through the four-way valve group;
the heat recoverer is also connected with the C port through the first one-way valve, the third electromagnetic valve and the second expansion valve; the air-cooled heat exchanger is also connected with the liquid reservoir through the second electromagnetic valve and the third one-way valve; the indoor side heat exchanger is also connected with the liquid reservoir through the sixth electromagnetic valve and the sixth one-way valve.
When the unit is in a heat recovery mode, the refrigerant flows through the indoor side heat exchanger to exchange heat with the circulating water phase for heating, the heated refrigerant flows into the heat recovery device to exchange heat with hot water in the heat recovery device, so that the hot water is heated, and the condensation heat of the refrigerant is fully recovered while refrigeration is realized. By the arrangement, the refrigerating energy consumption of the unit can be reduced, and the problem that condensation heat is directly discharged to the atmosphere to cause a severe heat island effect can be avoided.
When the unit is in a refrigerating mode, cooling water is introduced into the shell-and-tube condenser to exchange heat with a refrigerant in the shell-and-tube condenser, and then sprayed on the surface of the wet film heat exchanger through a spray pipe section, and gradually permeates into the wet film to exchange heat with air flowing through the wet film. The wet film heat exchanger can increase the contact area of cooling water and air on one hand, plays a role in rapidly cooling the cooling water, and on the other hand, plays a role in filtering the cooling water. Cooling water cooled and filtered by the wet film heat exchanger is introduced into the shell-and-tube condenser. Because the cooling water introduced into the shell-and-tube condenser is cooled and filtered, the problems of high running maintenance cost and poor running stability of the unit caused by scaling in the shell-and-tube condenser can be relieved, and the unit has lower running maintenance cost and better running stability.
And the refrigerant exchanges heat with the cooling water in the shell-and-tube condenser, and then flows into the air-cooled heat exchanger to exchange heat with air for cooling. Therefore, compared with an air cooling unit which simply adopts air cooling, a water cooling unit which simply adopts water cooling and an evaporation cooling unit which simply adopts evaporation cooling in the prior art, the heat pump unit has larger condensation area and higher refrigeration efficiency.
When the unit is in a heating mode, the refrigerant only flows through the air-cooled heat exchanger to exchange heat with air to raise the temperature. Therefore, the heat pump unit only operates air cooling in a heating mode, so that the problem that cooling water is frozen and cannot be heated is solved. The unit can heat efficiently in a low-temperature environment as low as-25 ℃.
The wet film type low-temperature total heat recovery air-cooled heat pump unit comprises a four-way valve group, a first heat-conducting valve group, a second heat-conducting valve group and a third heat-conducting valve group, wherein the four-way valve group comprises a first four-way valve, a second four-way valve and a third four-way valve;
the first four-way valve is characterized in that a first valve port is connected with the refrigerant outflow port, a second valve port is connected with the heat recoverer, a third valve port is connected with the gas-liquid separator, and a fourth valve port is connected with a second valve port of the second four-way valve;
the second four-way valve is characterized in that a first valve port is connected with a first valve port of the third four-way valve, the third valve port is connected with the indoor side heat exchanger, and a fourth valve port is connected with a second valve port of the third four-way valve through an eighth one-way valve;
the third four-way valve is connected with the gas-liquid separator, and the fourth valve port is connected with the shell-and-tube condenser and the air-cooled heat exchanger.
The wet film type low-temperature total heat recovery air-cooled heat pump unit comprises a first heat exchange part, a second heat exchange part, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, a shell-and-tube condenser and a fourth electromagnetic valve.
The wet film type low-temperature total heat recovery air-cooled heat pump unit comprises a heat recovery part, a hot water tank, a first regulating valve and a second regulating valve, wherein a water inlet of a heat recovery device is connected with the hot water tank through the first regulating valve, a water outlet of the heat recovery device is connected with the hot water tank through the second regulating valve.
The wet film type low-temperature total heat recovery air-cooled heat pump unit is characterized in that the dry filter is connected with the second refrigerant return port through a fifth electromagnetic valve, a thermal expansion valve and a seventh one-way valve.
The wet film type low-temperature total heat recovery air-cooled heat pump unit also comprises an outdoor unit housing, two partition boards and a bottom board, wherein the two partition boards, the bottom board, the top wall, the front wall and the rear wall of the outdoor unit housing are jointly enclosed to form a first accommodating cavity; the air-cooled heat exchanger and the wet film heat exchanger are both positioned in the first accommodating cavity, and the air-cooled heat exchanger is positioned above the wet film heat exchanger; the upper parts of the front wall and the rear wall are respectively provided with an air inlet, and the lower parts of the two partition boards are respectively provided with an air outlet.
The spray pipe section of the wet film type low-temperature total heat recovery air-cooled heat pump unit is also arranged in the first accommodating cavity and is positioned between the air-cooled heat exchanger and the wet film heat exchanger; the wet film type low-temperature total heat recovery air-cooled heat pump unit further comprises an air filter, wherein the air filter is also arranged in the first accommodating cavity and is positioned between the air-cooled heat exchanger and the spray pipe section.
The wet film type low temperature total heat recovery air-cooled heat pump unit comprises the outdoor unit housing, the protection plate and the grating plate arranged on the frame, and the air inlet is formed through the grating plate.
The wet film type low-temperature total heat recovery air-cooled heat pump unit is characterized in that the left side of one partition plate and the right side of the other partition plate are respectively provided with an air duct; the two air channels are communicated with the first accommodating cavity through the air outlets on the corresponding sides; outlets of the two air channels are formed on the top wall of the outdoor unit housing, and the fans are arranged at the positions of the outlets of the two air channels.
As described above, the wet film type low temperature total heat recovery air-cooled heat pump unit is provided with the water collector for collecting the moisture in the air in both air channels, and the water collected by the water collector falls back to the cooling water tank.
Drawings
FIG. 1 is a schematic overall flow chart of a first embodiment of a wet film type low temperature total heat recovery air-cooled heat pump unit provided by the invention;
FIG. 2 is a schematic diagram of the workflow in a cooling mode according to the first embodiment;
FIG. 3 is a schematic diagram of the workflow of the first embodiment in a refrigeration defrost mode;
FIG. 4 is a schematic diagram of the workflow in heating mode according to the first embodiment;
FIG. 5 is a schematic diagram of the workflow of the first embodiment in a heat recovery mode;
FIG. 6 is a schematic diagram of the workflow of the first embodiment in hot water mode;
FIG. 7 is a schematic diagram of the workflow of the first embodiment in a hot water defrosting mode;
fig. 8 is a schematic overall flow chart of a second embodiment of the wet film type low temperature total heat recovery air-cooled heat pump unit provided by the invention;
fig. 9 is a partial sectional view of the wet film type low temperature total heat recovery air-cooled heat pump unit provided by the invention under a front view angle;
fig. 10 is a full sectional view of the wet film type low temperature type total heat recovery air-cooled heat pump unit provided by the invention under a front view angle;
FIG. 11 is a cross-sectional view taken along the direction A-A in FIG. 10 of the wet film type low temperature total heat recovery air-cooled heat pump unit provided by the present invention;
fig. 12 is a top view of the wet film type low temperature total heat recovery air-cooled heat pump unit provided by the invention.
Reference numerals in fig. 1 to 12 are explained as follows:
a low-temperature jet enthalpy-increasing compressor, 2 a first four-way valve, 3 a second four-way valve, 4 an eighth one-way valve, 5 a third four-way valve, 6 a gas-liquid separator, 7 a first one-way valve, 8 a second one-way valve, 9 a first electromagnetic valve, 10 a second electromagnetic valve, 11 a third electromagnetic valve, 12 a third one-way valve, 13 a liquid storage device, 14 a dry filter, 15 a fourth electromagnetic valve, 16 a first expansion valve, 17 an economizer, 18 a second expansion valve, 19 a fourth one-way valve, 20 a fifth one-way valve, 21 a sixth one-way valve, 22 a fifth electromagnetic valve, 23 a seventh one-way valve, 24 a thermal expansion valve, 25 a sixth electromagnetic valve, 26/26' indoor side heat exchanger, 27 circulating water pump, 28 fan coil, 29 air-cooled heat exchanger, 30 fan, 31 spray pipe section, 32 wet film heat exchanger, 33 cooling water tank, 34 cooling water pump, 35 shell-and-tube condenser, 36 seventh solenoid valve, 37 eighth solenoid valve, 38 heat recoverer, 39 first governing valve, 40 second governing valve, 41 hot water tank, 42 hot water pump, E first refrigerant return port, F second refrigerant return port, G refrigerant outlet port, 43 outdoor unit housing, 431 frame, 432 backplate, 433 grid plate, 44 baffle, 441 air outlet, 45 bottom plate, a first accommodation chamber, b wind channel, 46 air filter, 47 water collector.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the following description is provided with reference to the accompanying drawings and the specific embodiments.
Referring to fig. 1, fig. 1 is a schematic overall flow chart of a specific embodiment of a wet film type low temperature total heat recovery air-cooled heat pump unit provided by the present invention.
As shown in FIG. 1, the wet film type low temperature total heat recovery air-cooled heat pump unit comprises a first heat exchange part, a second heat exchange part and a heat recovery part.
The following three are specifically introduced:
first heat exchange part
As shown in fig. 1, the first heat exchange part includes a fan coil 28, an indoor side heat exchanger 26 and a circulating water pump 27, and the fan coil 28 and the fan 30 heat exchanger are connected through the circulating water pump 27. The refrigerant enters the indoor heat exchanger 26 to exchange heat with the circulating water flowing through the indoor heat exchanger 26, then the circulating water flows into the fan coil 28 from the indoor heat exchanger 26, exchanges heat with the air flowing through the fan coil 28, and then the circulating water flows back into the indoor heat exchanger 26 to circulate reciprocally.
Alternatively, as shown in fig. 8, the first heat exchange unit includes a plurality of indoor heat exchangers 26 'and an indoor fan that causes air to flow through the indoor heat exchangers 26', and in this case, the air-cooled heat pump unit is a multiple unit. The refrigerant enters the indoor heat exchanger 26 'and exchanges heat with the air flowing through the indoor heat exchanger 26'.
Second heat exchange part
The second heat exchange part comprises an air-cooled heat exchanger 29 and a fan 30 for enabling air to flow through the surface of the air-cooled heat exchanger 29, and the refrigerant flows into the air-cooled heat exchanger 29 to exchange heat with the air flowing through the air-cooled heat exchanger 29.
The second heat exchange part further includes a cooling water tank 33, a wet film heat exchanger 32 located above the cooling water tank 33, a spray pipe section 31 for spraying cooling water onto the surface of the wet film heat exchanger 32, a float valve, an overflow port, and the like. Specifically, the wet film heat exchanger 32 includes an outer frame 431 and a wet film filled in the outer frame 431, wherein the wet film is a polymer composite filler (fiber, resin or PVC material, etc.), is not easy to scale, has low replacement cost, and has a filtering function. The cooling water sprays on the surface of the wet film heat exchanger 32 and gradually permeates into the wet film to exchange heat with the air flowing through the wet film. The wet film heat exchanger 32 can increase the contact area between the cooling water and the air, and can rapidly cool the cooling water, and can filter the cooling water.
The second heat exchange portion further includes a shell-and-tube condenser 35 communicating with the shower pipe section 31, and a cooling water pump 34 pumping cooling water into the shell-and-tube condenser 35. The cooling water is introduced into the shell-and-tube condenser 35 to exchange heat with the refrigerant in the shell-and-tube condenser 35. Because the cooling water introduced into the shell-and-tube condenser 35 is cooled and filtered, the problems of high unit operation and maintenance cost and poor operation stability caused by scaling in the shell-and-tube condenser 35 can be solved.
Heat recovery unit
The heat recovery part comprises a heat recoverer 38, a hot water tank 41, a first regulating valve 39 and a second regulating valve 40, wherein the water inlet of the heat recoverer 38 is communicated with the hot water tank 41 through the first regulating valve 39, a hot water pump 42 and the water outlet is communicated with the hot water tank 41 through the second regulating valve 40. When the heat pump unit is in the heat recovery mode, the refrigerant flows through the indoor side heat exchanger 26 to exchange heat with the circulating water phase to raise temperature, the refrigerant after the temperature rise flows into the heat recoverer 38 to exchange heat with hot water in the heat recoverer 38, so that the hot water is heated, and the condensation heat of the refrigerant is fully recovered while refrigeration is realized. By the arrangement, the refrigerating energy consumption of the unit can be reduced, and the problem that condensation heat is directly discharged to the atmosphere to cause a severe heat island effect can be avoided.
As shown in fig. 1, the wet film type low temperature total heat recovery air-cooled heat pump unit includes, in addition to the first heat exchange portion, the second heat exchange portion, and the heat recovery portion, a four-way valve group, a low temperature jet enthalpy increasing compressor 1, an eighth check valve 4, a gas-liquid separator 6, a first check valve 7, a second check valve 8, a first solenoid valve 9, a second solenoid valve 10, a third solenoid valve 11, a third check valve 12, a liquid reservoir 13, a dry filter 14, a fourth solenoid valve 15, a first expansion valve 16, an economizer 17, a second expansion valve 18, a fourth check valve 19, a fifth check valve 20, a sixth check valve 21, a fifth solenoid valve 22, a seventh check valve 23, a thermal expansion valve 24, a sixth solenoid valve 25, a seventh solenoid valve 36, an eighth solenoid valve 37, and the like.
The low-temperature jet enthalpy-increasing compressor 1 is provided with a first refrigerant reflux port E, a second refrigerant reflux port F and a refrigerant outflow port G; the economizer 17 is provided with a port a and a port B communicating with each other and a port C and a port D communicating with each other. Specifically, the low-temperature jet enthalpy-increasing compressor 11 may be a screw jet enthalpy-increasing compressor or a scroll jet enthalpy-increasing compressor. Of course, instead of the low-temperature enhanced vapor injection compressor 1, a normal compressor (non-enhanced vapor injection compressor) may be used.
The four-way valve group comprises a first four-way valve 2, a second four-way valve 3 and a third four-way valve 5. In a specific embodiment, the three are connected as follows: the first valve port of the first four-way valve 2 is connected with a refrigerant outflow port G, the second valve port of the first four-way valve 2 is connected with a heat recoverer 38, the third valve port of the first four-way valve 2 is connected with a gas-liquid separator 6, the fourth valve port of the first four-way valve 2 is connected with the second valve port of the second four-way valve 3, the first valve port of the second four-way valve 3 is connected with the first valve port of the third four-way valve 5, the third valve port of the second four-way valve 3 is connected with an indoor side heat exchanger 26, the fourth valve port of the second four-way valve 3 is connected with the second valve port of the third four-way valve 5 through an eighth one-way valve 4, the third valve port of the third four-way valve 5 is connected with the gas-liquid separator 6, and the fourth valve port of the third four-way valve 5 is connected with a shell-tube condenser 35 and an air-cooled heat exchanger 29.
The connection relation of the components is as follows:
the refrigerant outflow port G of the low-temperature jet enthalpy-increasing compressor is connected with the heat recoverer 38 through a four-way valve group.
The heat recoverer 38 is connected with the liquid reservoir 13 through the second one-way valve 8, the first electromagnetic valve 9 and the third one-way valve 12, and the liquid reservoir 13 is connected with the drier-filter 14.
The drier-filter 14 is connected to the D port of the economizer 17, and is also connected to the a port of the economizer 17 through the fourth solenoid valve 15 and the first expansion valve 16.
The port B of the economizer 17 is connected with a second refrigerant return port F of the low-temperature jet enthalpy-increasing compressor, and the port C of the economizer 17 is connected with an indoor side heat exchanger 26/26' through a second expansion valve 18, a fifth one-way valve 20 and a sixth electromagnetic valve 25.
The indoor side heat exchanger 26/26' is connected with the gas-liquid separator 6 through a four-way valve group; the gas-liquid separator 6 is connected with a first refrigerant return port E of the low-temperature jet enthalpy-increasing compressor.
The heat recovery device 38 is also connected to the reservoir 13 via a second non-return valve 8, a third solenoid valve 11, a sixth non-return valve 21.
The port C of the economizer 17 is also connected with the air-cooled heat exchanger 29 through the second expansion valve 18, the fourth check valve 19 and the second electromagnetic valve 10, the air-cooled heat exchanger 29 is connected with the shell-and-tube condenser 35, and the air-cooled heat exchanger 29 and the shell-and-tube condenser 35 are connected with the gas-liquid separator 6 through the four-way valve group.
The heat recoverer 38 is also connected to the C port of the economizer 17 through the first check valve 7, the third solenoid valve 11, and the second expansion valve 18.
The air-cooled heat exchanger 29 is also connected with the reservoir 13 through the second electromagnetic valve 10 and the third one-way valve 12.
The indoor side heat exchanger 26/26' is also connected to the reservoir 13 via a sixth solenoid valve 25, a sixth one-way valve 21.
In a specific embodiment, the filter drier 14 is further connected to a second refrigerant return port of the low-temperature enhanced vapor injection compressor 1 through a fifth electromagnetic valve 22, a thermal expansion valve 24, and a seventh check valve 23. When the temperature of the low-temperature jet enthalpy-increasing compressor 1 is higher than the set value, the fifth electromagnetic valve 22 is opened, and part of the low-temperature refrigerant flows back to the second refrigerant return port F, so that the low-temperature jet enthalpy-increasing compressor 1 is cooled.
Referring to fig. 2-7, fig. 2 is a schematic diagram of a workflow in a cooling mode according to a first embodiment; FIG. 3 is a schematic diagram of the workflow of the first embodiment in a refrigeration defrost mode; FIG. 4 is a schematic diagram of the workflow in heating mode according to the first embodiment; FIG. 5 is a schematic diagram of the workflow of the first embodiment in a heat recovery mode; FIG. 6 is a schematic diagram of the workflow of the first embodiment in hot water mode; fig. 7 is a schematic diagram of the workflow of the first embodiment in the hot water defrosting mode.
Modes which can be realized by the wet film type low temperature total heat recovery air-cooled heat pump unit and working flows under each mode are specifically described below with reference to fig. 2 to 7:
refrigeration mode
As shown in fig. 2, when the unit is in the cooling mode, the fan 30, the cooling water pump 34, and the circulating water pump 27 are started, the hot water pump 42 is turned off, the seventh solenoid valve 36, the first solenoid valve 9, the third solenoid valve 11, and the fourth solenoid valve 15 are turned off (or not turned off), and the other valves are turned on.
The flow path of the refrigerant is as follows: the refrigerant outlet G, the first four-way valve 2, the second four-way valve 3, the third four-way valve 5, the shell-and-tube condenser 35, the air-cooled heat exchanger 29, the second electromagnetic valve 10, the third one-way valve 12, the liquid storage device 13, the drying filter 14, the D port of the economizer 17, the C port of the economizer 17, the second expansion valve 18, the fifth one-way valve 20, the sixth electromagnetic valve 25, the indoor heat exchanger 26, the second four-way valve 3, the eighth one-way valve 4, the third four-way valve 5, the gas-liquid separator 6 and the first refrigerant return port E.
In this mode, the cooling water is introduced into the shell-and-tube condenser 35 to exchange heat with the refrigerant in the shell-and-tube condenser 35, and then sprayed on the surface of the wet film heat exchanger 32 through the spray pipe section 31, and gradually permeates into the wet film to exchange heat with the air flowing through the wet film, and the cooling water cooled and filtered by the wet film heat exchanger 32 is introduced into the shell-and-tube condenser 35. The refrigerant firstly flows into the shell-and-tube condenser 35 to exchange heat with cooling water for cooling, and then flows into the air-cooled heat exchanger 29 to exchange heat with air for cooling.
Therefore, compared with an air cooling unit which simply adopts air cooling, a water cooling unit which simply adopts water cooling and an evaporation cooling unit which simply adopts evaporation cooling in the prior art, the air cooling and water cooling parallel cooling system has larger condensation area and higher refrigeration efficiency.
Refrigeration defrosting mode
As shown in fig. 3, when the unit is in the cooling defrosting mode, the circulating water pump 27 is started, the blower 30, the cooling water pump 34 and the hot water pump 42 are turned off, and the seventh solenoid valve 36, the first solenoid valve 9, the third solenoid valve 11 and the fourth solenoid valve 15 are turned off (may or may not be turned off).
In this mode, the flow path of the refrigerant is identical to the flow path of the refrigerant in the cooling mode.
In this mode, the refrigerant flows through the indoor side heat exchanger 26 to exchange heat with the circulating water, and the warmed refrigerant flows through the shell-and-tube condenser 35 and the air-cooled heat exchanger 29 (the warmed refrigerant may be caused to flow only through the air-cooled heat exchanger 29), whereby frost condensed on the air-cooled heat exchanger 29 is removed.
Heating mode
As shown in fig. 4, when the unit is in the heating mode, the blower 30 and the circulating water pump 27 are started, the cooling water pump 34 and the hot water pump 42 are turned off, the eighth solenoid valve 37, the first solenoid valve 9, the third solenoid valve 11 are turned off, and the other valves are turned on.
The flow path of the refrigerant is as follows: the refrigerant outlet G, the first four-way valve 2, the second four-way valve 3, the indoor side heat exchanger 26, the sixth electromagnetic valve 25, the sixth one-way valve 21, the liquid storage 13 and the dry filter 14 are divided into two paths.
The first path is as follows: fourth solenoid valve 15→first expansion valve 16→port a of economizer 17→port B of economizer 17→second refrigerant return port F.
The second path is as follows: port D of the economizer 17, port C of the economizer 17, the second expansion valve 18, the fourth check valve 19, the second solenoid valve 10, the air-cooled heat exchanger 29, the seventh solenoid valve 36, the third four-way valve 5, the gas-liquid separator 6 and the first refrigerant return port E.
The refrigerant entering the opening a of the economizer 17 through the first path is in a gaseous state, the refrigerant entering the opening C of the economizer 17 through the second path is in a gas-liquid mixed state, and the refrigerants in the two paths exchange heat in the economizer 1715, so that the temperature of the gas-liquid mixed state refrigerant is further reduced.
After that, the cooled part of the refrigerant flows into the air-cooled heat exchanger 29 to exchange heat with air, and the temperature of the part of the refrigerant is low, so that the part of the refrigerant can exchange heat with air and raise the temperature in an outdoor environment as low as-25 ℃, and the heat pump unit can heat efficiently in the outdoor environment as low as-25 ℃. In addition, in the heating mode, only air cooling is operated, so that the problem that cooling water is frozen and cannot be heated does not exist.
Heat recovery mode
As shown in fig. 5, when the unit is in the heat recovery mode, the circulation water pump 27 and the hot water pump 42 are started, the fan 30 and the cooling water pump 34 are turned off, the third solenoid valve 11, the second solenoid valve 10, the seventh solenoid valve 36, the eighth solenoid valve 37, the fourth solenoid valve 15 (which may or may not be turned off), and the other valves are opened.
The flow path of the refrigerant is as follows: the refrigerant outlet G, the first four-way valve 2, the heat recoverer 38, the second one-way valve 8, the first electromagnetic valve 9, the third one-way valve 12, the liquid storage 13, the dry filter 14, the D port of the economizer 17, the second expansion valve 18, the fifth one-way valve 20, the sixth electromagnetic valve 25, the indoor side heat exchanger 26, the second four-way valve 3, the first four-way valve 2, the gas-liquid separator 6 and the first refrigerant return port E.
In this mode, the refrigerant flows through the indoor side heat exchanger 26 to exchange heat with the circulating water, and the warmed refrigerant flows into the heat recoverer 38 to exchange heat with the hot water in the heat recoverer 38, so that the hot water is warmed, and the condensation heat of the refrigerant is fully recovered while refrigeration is realized. By the arrangement, the energy consumption of the unit can be reduced, and the problem that condensation heat is directly discharged into the atmosphere to heat the severe heat island effect can be avoided.
Hot water mode
As shown in fig. 6, when the unit is in the hot water mode, the blower 30 and the hot water pump 42 are started, the cooling water pump 34 and the circulating water pump 27 are turned off, the first solenoid valve 9, the sixth solenoid valve 25 and the eighth solenoid valve 37 are turned off, and the other valves are opened.
The flow path of the refrigerant is as follows: the refrigerant outlet G, the first four-way valve 2, the heat recoverer 38, the second one-way valve 8, the third electromagnetic valve 11, the sixth one-way valve 21, the liquid storage 13 and the dry filter 14 are divided into two paths.
The first path is as follows: fourth solenoid valve 15→first expansion valve 16→port a of economizer 17→port B of economizer 17→second refrigerant return port F.
The second path is as follows: port D of the economizer 17, port C of the economizer 17, the second expansion valve 18, the fourth check valve 19, the second solenoid valve 10, the air-cooled heat exchanger 29, the seventh solenoid valve 36, the third four-way valve 5, the gas-liquid separator 6 and the first refrigerant return port E.
In this mode, the refrigerant flows through the air-cooled heat exchanger 29 to exchange heat with air, and the warmed refrigerant flows through the heat recovery device 38 to exchange heat with hot water in the heat recovery device 38, thereby warming the hot water.
Hot water cream mode
As shown in fig. 7, when the unit is in the hot water frost mode, the hot water pump 42 is started, the fan 30, the cooling water pump 34, and the circulating water pump 27 are turned off, the seventh solenoid valve 36, the first solenoid valve 9, the fourth solenoid valve 15 (or may not be turned off), the sixth solenoid valve 25, and the other valves are turned on.
In this mode, the flow path of the refrigerant is: the low-temperature jet enthalpy-increasing compressor 1, a first four-way valve 2, a second four-way valve 3, a third four-way valve 5, an eighth electromagnetic valve 37, a shell-and-tube condenser 35, an air-cooled heat exchanger 29, a second electromagnetic valve 10, a third one-way valve 12, a liquid storage 13, a dry filter 14, a D port of an economizer 17, a second expansion valve 18, a fifth one-way valve 20, a third electromagnetic valve 11, a first one-way valve 7, a heat recovery device 38, the first four-way valve 2, a gas-liquid separator 6 and a first refrigerant return port E.
In this mode, the refrigerant flows through the heat recovery device 38 to exchange heat with the hot water, and the warmed refrigerant flows through the shell-and-tube condenser 35 and the air-cooled heat exchanger 29 (the warmed refrigerant may be caused to flow only through the air-cooled heat exchanger 29), whereby frost condensed on the air-cooled heat exchanger 29 is removed.
Besides the components, the wet film type low temperature total heat recovery air-cooled heat pump unit also comprises an electric control component, and specifically comprises a pressure sensor, a temperature sensor, a pressure switch, a temperature switch, wires, cables, an electric control box body, a relay, a contactor, a PLC microcomputer board and the like, wherein the relay, the contactor and the PLC microcomputer board are positioned in the electric control box body.
The following specifically describes the arrangement positions of all components of a wet film type low temperature type total heat recovery air-cooled heat pump unit, please refer to fig. 9-12, fig. 9 is a partial sectional view of the wet film type low temperature type total heat recovery air-cooled heat pump unit provided by the present invention under a front view perspective; fig. 10 is a full sectional view of the wet film type low temperature type total heat recovery air-cooled heat pump unit provided by the invention under a front view angle; FIG. 11 is a cross-sectional view taken along the direction A-A in FIG. 10 of the wet film type low temperature total heat recovery air-cooled heat pump unit provided by the present invention; fig. 12 is a top view of the wet film type low temperature total heat recovery air-cooled heat pump unit provided by the invention.
As shown in fig. 9-10, the wet film type low temperature total heat recovery air-cooled heat pump unit further includes an outdoor unit housing 43, two partition plates 44 and a bottom plate 45 are disposed in the outdoor unit housing 43, and the two partition plates 44, the bottom plate 45, the top wall, the front wall and the rear wall of the outdoor unit housing 43 jointly enclose a first accommodating cavity a.
The air-cooled heat exchanger 29 and the wet film heat exchanger 32 are both located in the first housing chamber a. And, the air-cooled heat exchanger 29 is located above the wet film heat exchanger 32; and, the upper portions of the front wall and the rear wall of the first accommodating chamber a are provided with air inlets, and the lower portions of the left side wall and the right side wall of the first accommodating chamber a are provided with air outlets 441.
Specifically, as shown in fig. 9, the outdoor unit casing 43 includes a frame 431, and a guard plate 432 and a grill plate 433 provided on the frame 431, and the air inlet is formed through the grill plate 433.
Specifically, as shown in fig. 11, the air-cooled heat exchanger 29 may be provided as a V-fin type heat exchanger. And the two side surfaces of the V-shaped are facing the air inlet, the bottom surface of the V-shaped is downward, the tip is upward, and the whole V-shaped is inverted.
Specifically, the above-mentioned shower pipe section 31 is also provided in the first accommodation chamber a, and it is located between the air-cooled heat exchanger 29 and the wet film heat exchanger 32. The wet film type low temperature total heat recovery air-cooled heat pump unit further comprises an air filter 46 for filtering impurities in the air, wherein the air filter 46 is also arranged in the first accommodating cavity a and is positioned between the air-cooled heat exchanger 29 and the spray pipe section 31.
Further, as shown in fig. 10, a duct b is provided on the left side of the partition 44 on the left side and a duct b is provided on the right side of the partition 44 on the right side, that is, on the left side and the right side of the first accommodation chamber a, respectively. And, the left air channel b communicates with the first accommodating chamber a through the left air outlet 441, and the right air channel b communicates with the first accommodating chamber a through the right air outlet 441. Moreover, as shown in the figure, the outlets of the two air channels b are formed on the top wall of the outdoor unit casing 43, the fans 30 are disposed in the two air channels b, and the fans 30 are located at positions close to the outlets of the air channels b.
Specifically, the two air channels b are also provided with water receivers 47 for collecting moisture in the air, and water collected by the water receivers 47 falls back to the cooling water tank 33 so as to reduce the loss of cooling water.
More specifically, the cooling water tank 33 is disposed below the first accommodation chamber a and the air duct b, and as shown, the right side of the bottom plate 45 is inclined upward when the cooling water tank 33 is disposed in a position to the left. At this time, the water collected by the water collector 47 on the left side may directly fall into the cooling water tank 33, and the water collected by the water collector 47 on the right side may be introduced into the cooling water tank 33 through the bottom plate 45. And, the cooling water pump 34 is directly provided in the cooling water tank 33 so as to save space.
Specifically, other components of the wet film type low temperature total heat recovery air-cooled heat pump unit are also arranged below the first accommodating cavity a and the air duct b, and are arranged at the right side as shown in fig. 10.
In the above arrangement, as shown by arrow lines in fig. 9 and 10, the air flows through the surface of the air-cooled heat exchanger 29 located above and then through the surface of the wet film heat exchanger 32 after entering the first accommodating chamber a from the grid plate 433 by the fan 30, and then flows through the air outlets 441 on both sides to the air channels b on the corresponding sides, and is discharged from the outlets of the air channels b, so that the cooling effect of the wet film heat exchanger 32 on the cooling water can be enhanced.
Summarizing, the wet film type low-temperature total heat recovery air-cooled heat pump unit provided by the invention has the following technical effects:
1. the condensation heat of the refrigerant is fully recovered, so that the refrigerating energy consumption of a unit can be reduced, and the problem that the condensation heat is directly discharged into the atmosphere to add a severe heat island effect can be avoided.
2. Through setting up the wet film heat exchanger 32 that is difficult for the scale deposit itself, let into shell and tube condenser 35 after making the cooling water cool down and filter, alleviateed shell and tube condenser 35's scale deposit problem, avoid scale deposit serious cause the unit efficiency decline, the unit operation maintenance cost is high, the poor problem of operating stability.
3. During refrigeration, air cooling and water cooling are parallel, so that high-efficiency refrigeration can be realized.
4. When heating, only air cooling is operated, so that the problem that the heating efficiency is low even the heating cannot be performed in a low-temperature environment where cooling water is frozen is solved, and therefore the heating can be performed efficiently, and the low-temperature air injection enthalpy-increasing compressor 1 is arranged, so that the heating can be performed efficiently at the environment temperature as low as-25 ℃, and the heating device has a wider application region (can be used in northeast China) and is convenient to popularize.
5. The components are reasonably distributed, the whole structure is compact, and the components are directly placed on the ground or a roof (without a machine room) when in use, so that the use cost is low.
The wet film type low-temperature total heat recovery air-cooled heat pump unit provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (10)

1. The wet film type low-temperature total heat recovery air-cooled heat pump unit is characterized by comprising a low-temperature jet enthalpy-increasing compressor (1), a gas-liquid separator (6), a first one-way valve (7), a second one-way valve (8), a first electromagnetic valve (9), a second electromagnetic valve (10), a third electromagnetic valve (11), a third one-way valve (12), a liquid storage device (13), a drying filter (14), a fourth electromagnetic valve (15), a first expansion valve (16), an economizer (17), a second expansion valve (18), a fourth one-way valve (19), a fifth one-way valve (20), a sixth one-way valve (21), a sixth electromagnetic valve (25), a four-way valve group, a first heat exchange part, a second heat exchange part and a heat recovery part, wherein the low-temperature jet enthalpy-increasing compressor (1) is a screw jet enthalpy-increasing compressor or a vortex jet enthalpy-increasing compressor;
the heat recovery section includes a heat recovery device (38) and a hot water pump (42) that pumps hot water to the heat recovery device (38); the first heat exchange portion comprises an indoor side heat exchanger (26, 26'); the second heat exchange part comprises an air-cooled heat exchanger (29), a fan (30) for enabling air to flow through the surface of the air-cooled heat exchanger (29), a shell-and-tube condenser (35), a cooling water pump (34) for pumping cooling water to the shell-and-tube condenser (35), a cooling water tank (33), a wet film heat exchanger (32) positioned above the cooling water tank (33) and a spray pipe section (31) for spraying the cooling water to the wet film heat exchanger (32), wherein the spray pipe section (31) is connected with the shell-and-tube condenser (35);
the low-temperature jet enthalpy-increasing compressor (1) is provided with a first refrigerant return port (E), a second refrigerant return port (F) and a refrigerant outlet port (G); the economizer (17) is provided with an A port and a B port which are communicated with each other, and a C port and a D port which are communicated with each other;
the refrigerant outflow port (G) is connected with the heat recoverer (38) through the four-way valve group; the heat recoverer (38) is connected with the liquid reservoir (13) through the second one-way valve (8), the first electromagnetic valve (9) and the third one-way valve (12); the liquid reservoir (13) is connected with the drying filter (14); the drying filter (14) is connected with the port D and is also connected with the port A through the fourth electromagnetic valve (15) and the first expansion valve (16); the port B is connected with the second refrigerant reflux port (F); the port C is connected with the indoor side heat exchangers (26, 26') through the second expansion valve (18), the fifth one-way valve (20) and the sixth electromagnetic valve (25); the indoor side heat exchangers (26, 26') are connected with the gas-liquid separator (6) through the four-way valve group; the gas-liquid separator (6) is connected with the first refrigerant return port (E);
the heat recoverer (38) is also connected with the liquid reservoir (13) through the second one-way valve (8), the third electromagnetic valve (11) and the sixth one-way valve (21); the port C is also connected with the air-cooled heat exchanger (29) through the second expansion valve (18), the fourth one-way valve (19) and the second electromagnetic valve (10); the air-cooled heat exchanger (29) is connected with the shell-and-tube condenser (35); the air-cooled heat exchanger (29) and the shell-and-tube condenser (35) are connected with the gas-liquid separator (6) through the four-way valve group;
the heat recoverer (38) is also connected with the port C through the first one-way valve (7), the third electromagnetic valve (11) and the second expansion valve (18); the air-cooled heat exchanger (29) is also connected with the liquid reservoir (13) through the second electromagnetic valve (10) and the third one-way valve (12); the indoor side heat exchangers (26, 26') are also connected with the liquid reservoir (13) through the sixth electromagnetic valve (25) and the sixth one-way valve (21).
2. The wet film type low-temperature total heat recovery air-cooled heat pump unit according to claim 1, wherein the four-way valve group comprises a first four-way valve (2), a second four-way valve (3) and a third four-way valve (5);
the first four-way valve (2) is characterized in that a first valve port is connected with the refrigerant outflow port (G), a second valve port is connected with the heat recoverer (38), a third valve port is connected with the gas-liquid separator (6), and a fourth valve port is connected with a second valve port of the second four-way valve (3);
the second four-way valve (3), the first valve port is connected with the first valve port of the third four-way valve (5), the third valve port is connected with the indoor side heat exchangers (26, 26'), and the fourth valve port is connected with the second valve port of the third four-way valve (5) through an eighth one-way valve (4);
the third four-way valve (5) is connected with the gas-liquid separator (6), and the fourth valve port is connected with the shell-and-tube condenser (35) and the air-cooled heat exchanger (29).
3. The wet film type low temperature total heat recovery air-cooled heat pump unit according to claim 1, wherein the second heat exchange part further comprises a seventh electromagnetic valve (36) and an eighth electromagnetic valve (37), and the refrigerant outflow port (G) is connected with the air-cooled heat exchanger (29) through the four-way valve group and the seventh electromagnetic valve (36), and is connected with the shell-and-tube condenser (35) through the four-way valve group and the eighth electromagnetic valve (37).
4. Wet film type low temperature total heat recovery air-cooled heat pump unit according to claim 1, wherein the heat recovery part further comprises a hot water tank (41), a first regulating valve (39) and a second regulating valve (40), the water inlet of the heat recovery device (38) is connected with the hot water tank (41) through the first regulating valve (39) and the hot water pump (42), and the water outlet of the heat recovery device (38) is connected with the hot water tank (41) through the second regulating valve (40).
5. Wet film type low temperature total heat recovery air-cooled heat pump unit according to claim 1, wherein the drying filter (14) is further connected with the second refrigerant return port (F) through a fifth electromagnetic valve (22), a thermal expansion valve (24) and a seventh one-way valve (23).
6. Wet film type low temperature total heat recovery air-cooled heat pump unit according to any one of claims 1-5, further comprising an outdoor unit casing (43) and two partition boards (44) and a bottom board (45) located therein, wherein the two partition boards (44), the bottom board (45) and the top wall, front wall and rear wall of the outdoor unit casing (43) enclose a first accommodating chamber (a) together; the air-cooled heat exchanger (29) and the wet film heat exchanger (32) are both positioned in the first accommodating cavity (a), and the air-cooled heat exchanger (29) is positioned above the wet film heat exchanger (32); the upper parts of the front wall and the rear wall are respectively provided with an air inlet, and the lower parts of the two partition plates (44) are respectively provided with an air outlet (441).
7. Wet film type low temperature total heat recovery air cooled heat pump unit as claimed in claim 6, wherein said spray pipe section (31) is also provided in said first housing chamber (a) and is located between said air cooled heat exchanger (29) and said wet film heat exchanger (32); the wet film type low-temperature total heat recovery air-cooled heat pump unit further comprises an air filter (46), wherein the air filter (46) is also arranged in the first accommodating cavity (a) and is positioned between the air-cooled heat exchanger (29) and the spray pipe section (31).
8. The wet film type low temperature total heat recovery air-cooled heat pump unit according to claim 6, wherein the outdoor unit casing (43) includes a frame (431) and a guard plate (432) and a grating plate (433) provided on the frame (431), and the air intake is formed by the grating plate (433).
9. The wet film type low temperature total heat recovery air-cooled heat pump unit according to claim 6, wherein an air duct (b) is provided on both the left side of one of the partition plates (44) and the right side of the other partition plate (44); the two air channels (b) are communicated with the first accommodating cavity (a) through the air outlets (441) at the corresponding sides; outlets of the two air channels (b) are formed on the top wall of the outdoor unit housing (43), and the fans (30) are arranged at the positions of the outlets of the two air channels (b).
10. The wet film type low temperature total heat recovery air-cooled heat pump unit according to claim 9, wherein a water receiver (47) for collecting moisture in air is arranged in each of the two air channels (b), and water collected by the water receiver (47) falls back to the cooling water tank (33).
CN201811140758.XA 2018-09-28 2018-09-28 Wet film type low-temperature total heat recovery air-cooled heat pump unit Active CN108931070B (en)

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CN109916104A (en) * 2019-03-11 2019-06-21 李国斌 A kind of cold Multisource heat pump unit of evaporation

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CN208887153U (en) * 2018-09-28 2019-05-21 瀚润联合高科技发展（北京）有限公司 A kind of wet film formula low form total heat recovery Air-Cooled Heat Pump Unit

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CN101078571A (en) * 2007-06-27 2007-11-28 王全龄 Highly effective air source heat pump type air-conditioning and hot water device
WO2009114980A1 (en) * 2008-03-18 2009-09-24 Xu Lihua A heat exchanging type condenser used in an air conditioner and a sprinkling evaporative cooling system
CN102967019A (en) * 2012-12-18 2013-03-13 四川澄观节能环保科技有限公司 Direct evaporation integral heat pipe exchanger
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