CN111473666A - Cascade evaporation cold and hot pump module unit - Google Patents

Cascade evaporation cold and hot pump module unit Download PDF

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Publication number
CN111473666A
CN111473666A CN202010401525.1A CN202010401525A CN111473666A CN 111473666 A CN111473666 A CN 111473666A CN 202010401525 A CN202010401525 A CN 202010401525A CN 111473666 A CN111473666 A CN 111473666A
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CN
China
Prior art keywords
cooling
heat exchange
pipe
refrigerant
water
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Pending
Application number
CN202010401525.1A
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Chinese (zh)
Inventor
李国斌
李一杰
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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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Application filed by Hanrun United High Tech Development Beijing Co ltd filed Critical Hanrun United High Tech Development Beijing Co ltd
Priority to CN202010401525.1A priority Critical patent/CN111473666A/en
Publication of CN111473666A publication Critical patent/CN111473666A/en
Priority to PCT/CN2021/093097 priority patent/WO2021228098A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit

Abstract

The invention relates to a cascade evaporation cold and heat pump module unit, which comprises an evaporation cold heat exchanger, an air-cooled heat exchanger and a refrigerant operation assembly, wherein the evaporation cold heat exchanger is arranged on the air-cooled heat exchanger; the evaporative cooling heat exchanger and the air cooling heat exchanger are connected in parallel and then are connected with the refrigerant operation assembly; the refrigerant operation assembly is used for operating the refrigerant to exchange heat in the evaporative cooling or air cooling heat exchanger; the evaporative cooling heat exchanger comprises at least one heat exchange unit; the heat exchange unit is in a plate-shaped structure, has continuity and is in a concave-convex shape; the heat exchange unit also comprises a cooling outer pipe, a water distribution groove and a cooling inner pipe; both sides of the water distribution groove are provided with water distribution microporous plates; the water distribution microporous plate is connected with the cooling outer pipe and the pipe wall of the condensation pipe, and the water distribution groove and the cooling inner pipe are used for exchanging heat with the refrigerant at the inner side and the outer side of the refrigerant heat exchange channel. The cascade evaporation cold-hot pump module unit adopts the cascade evaporation cold heat exchanger, has high heat exchange efficiency, saves water and is convenient to maintain; not only can refrigerate, but also can heat; the volume is small, and the stability is high; the construction is easy; the noise is low, and the use cost is reduced.

Description

Cascade evaporation cold and hot pump module unit
Technical Field
The invention relates to the field of heat pump units, in particular to a cascade evaporation cold and heat pump module unit.
Background
The water-cooling air conditioner has obvious refrigeration efficiency compared with the air-cooling air conditioner, so that the water-cooling air conditioner is the first choice equipment in the field of refrigeration of central air conditioners. However, the water-cooled air conditioner has the characteristics of large volume, inconvenience in installation, transportation, maintenance and the like, and particularly occupies a large indoor area, so that the building waste is caused. Therefore, the small-sized modularization of the unit becomes a necessary trend for the development of the water-cooled water chilling unit. However, the shell-and-tube condenser or the evaporative condenser commonly used by the existing water-cooling water chilling unit has the phenomena of large volume, low efficiency, serious water-cooling water waste caused by the phenomenon of water splashing and the like, and the miniaturization and modularization of the water-cooling water chilling unit are restricted.
In the existing water-cooling water chilling unit, the water-cooling shell-and-tube condenser and the evaporative condensation heat exchanger still have the following problems:
shell and tube condenser: the operation process of the refrigeration air conditioner is the process of transferring heat from a client to the outdoor, the refrigerant obtains lower supercooling degree which is the premise of stable and efficient operation of the air conditioner, the refrigerant flow in the heat exchanger is required to be sufficiently long in order to enable the high-temperature and high-pressure refrigerant steam discharged by a compressor to be close to the outdoor environment to the maximum extent, and the shell-and-tube heat exchanger is large in size and high in power due to the consideration of heat exchange capacity and manufacturing cost, so that the heat exchanger is not beneficial to miniaturization; the latent heat of vaporization heat exchange quantity of cooling water is tens of times of heat transfer heat exchange quantity, and the heat transfer heat exchange mode of sealing between the shell and tube heat exchanger shell and tube is not favorable for vaporization and evaporation of water, and limits the heat exchange efficiency of the heat exchanger. Therefore, the efficiency needs to be improved, the volume is reduced, and the miniaturization of the air conditioner is facilitated.
An evaporation condensation heat exchanger: the existing evaporative cooling heat exchangers are not provided with water distribution devices, and need to be matched with a spraying device for use. Therefore, the volume of the air conditioning unit is increased, and the manufacturing cost is increased, so that the miniaturization of the unit is not facilitated; the cooling water sprayed downwards in the cooling process and the air under the negative pressure in the unit cavity generate reverse flow to cause a large amount of 'water flying' and 'water floating', so that water resource waste is caused and the cooling efficiency is reduced.
No matter the evaporation condensation heat exchanger or the water-cooling shell-and-tube heat exchanger is a single cooling medium, the dividing wall type heat exchange structure with a single heat exchange surface realizes heat exchange between the cooling medium and a refrigerant through a tube wall between the two media, and the structure limits a heat transfer surface between the two media to be not beneficial to heat transfer.
Disclosure of Invention
In order to solve the technical problems, the invention provides a cascade evaporation cooling heat pump module unit, which adopts a cascade evaporation cooling heat exchanger, has high heat exchange efficiency, saves water and is convenient to maintain; not only can refrigerate, but also can heat; the volume is small, and the stability is high; the construction is easy; the noise is low, and the use cost is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: a cascade evaporation cold and heat pump module unit comprises an evaporation cold heat exchanger, an air-cooled heat exchanger and a refrigerant operation assembly; the evaporative cooling heat exchanger and the air cooling heat exchanger are connected in parallel and then are connected with the refrigerant operation assembly; the refrigerant operation assembly is used for operating a refrigerant to exchange heat in an evaporative cooling heat exchanger or an air cooling heat exchanger;
the evaporative cooling heat exchanger comprises a plurality of heat exchange plates which are arranged at intervals along the direction vertical to the evaporative heat exchange surface; each heat exchange plate comprises at least one heat exchange unit; the heat exchange unit is of a plate-shaped structure formed by vertically arranging a plurality of horizontal sections of the condensation pipes, two ends of the horizontal sections of the condensation pipes are connected through bent sections of the condensation pipes to form at least one refrigerant heat exchange channel, and two surfaces of the plate-shaped structure form evaporation heat exchange surfaces; the horizontal sections of two adjacent condensing tubes in the horizontal sections of the plurality of condensing tubes vertically arranged in the plate-shaped structure are connected without gaps, so that the evaporation heat exchange surface has continuity and is in a concave-convex shape; a bracket is arranged between the cooling outer pipe and the horizontal section of the condensing pipe in the water distribution tank; a cooling outer pipe is arranged above the horizontal section of the uppermost condensing pipe; a water distribution groove is also arranged between the cooling outer pipe and the horizontal section of the uppermost condensing pipe; both sides of the water distribution tank are provided with water distribution microporous plates; the upper end of the water distribution microporous plate is connected with the pipe wall of the cooling outer pipe, and the lower end of the water distribution microporous plate is connected with the pipe wall of the horizontal section of the uppermost condensing pipe, so that the water distribution tank is fixed between the cooling outer pipe and the heat exchange unit in an embedded manner to form an integral structure; the cooling outer pipe is provided with a plurality of water outlet holes which are communicated with the water distribution tank and used for uniformly injecting water into the water distribution tank; the water distribution groove is used for uniformly distributing water injected by the cooling outer pipe on the evaporation heat exchange plate surface through the water distribution microporous plate to form a water curtain to exchange heat with the refrigerant at the outer side of the refrigerant heat exchange channel; and a cooling inner pipe is arranged in the refrigerant heat exchange channel in a penetrating manner and is used for exchanging heat with the refrigerant at the inner side of the refrigerant heat exchange channel through water passing through the cooling inner pipe.
Further, the heat exchange plate comprises a plurality of heat exchange units; the heat exchange units are vertically arranged, and two adjacent heat exchange units are connected through bent sections of the condenser pipe, so that respective refrigerant heat exchange channels are correspondingly communicated; the top of the cooling outer pipe in the heat exchange unit positioned at the lower side in the two adjacent heat exchange units is connected with the bottom of the horizontal section of the condensation pipe positioned at the lowest side of the heat exchange unit positioned at the upper side; and the plurality of brackets are arranged between the bottom of the cooling outer pipe and the top of the uppermost horizontal section of the condensing pipe of the heat exchange unit at intervals.
Further, the connection mode of the cooling outer pipe, the water distribution groove and the water distribution microporous plate between two adjacent heat exchange units is replaced by: a water distribution groove is arranged above the cooling outer pipe, water distribution micro-porous plates are arranged on two sides of the water distribution groove, the lower ends of the water distribution micro-porous plates are connected with the pipe wall of the cooling outer pipe, and the upper ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section of the bottommost condensing pipe of the heat exchange unit positioned on the upper side; the bottom of the cooling outer pipe is connected with the top of the horizontal section of the uppermost condensing pipe in the heat exchange unit; the plurality of brackets are arranged between the top of the cooling outer pipe and the bottom of the horizontal section of the lowest condensation pipe of the heat exchange unit on the upper side at intervals.
Furthermore, a water distribution groove is arranged between the horizontal section of the lowest condenser pipe of the heat exchange unit at the upper side and the horizontal section of the highest condenser pipe of the heat exchange unit at the lower side, water distribution micro-porous plates are arranged at two sides of the water distribution groove, the lower ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section of the highest condenser pipe of the heat exchange unit at the lower side, and the upper ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section of the lowest condenser pipe of the heat exchange unit at the upper side; the cooling outer pipe penetrates through the water distribution tank.
Furthermore, the top of the cooling outer tube is connected with the bottom of the horizontal section of the condenser tube at the lowest side of the heat exchange unit at the upper side, and a distance is reserved between the top of the horizontal section of the condenser tube at the uppermost side of the heat exchange unit to which the cooling outer tube belongs and the bottom of the cooling outer tube.
Furthermore, the bottom of the cooling outer pipe is connected with the top of the uppermost horizontal section of the condenser pipe of the heat exchange unit to which the cooling outer pipe belongs, and a distance is reserved between the bottom of the uppermost horizontal section of the condenser pipe of the heat exchange unit positioned on the upper side and the top of the lowermost horizontal section of the condenser pipe of the heat exchange unit positioned on the upper side, and the plurality of brackets are arranged at intervals between the top of the cooling outer pipe and the bottom of the lowermost horizontal section of the condenser pipe of the heat exchange unit positioned on the upper side.
Furthermore, in two adjacent heat exchange units, the number of the horizontal sections of the condensing tubes in the heat exchange unit positioned on the lower side is smaller than that of the horizontal sections of the condensing tubes in the heat exchange unit positioned on the upper side, so that the heat exchange areas of the evaporation heat exchange surfaces of the plurality of heat exchange units are gradually decreased from top to bottom; the number of the water outlet holes of the cooling outer pipe in the heat exchange unit on the lower side is smaller than that of the water outlet holes of the cooling outer pipe on the upper side, and the water distribution requirement of the evaporation heat exchange surface corresponding to the heat exchange area is met.
Furthermore, the top end of the refrigerant heat exchange channel of the heat exchange plate is provided with a refrigerant steam inlet, and the bottom end of the refrigerant heat exchange channel is provided with a refrigerant liquid outlet; one end of the cooling outer pipe of the heat exchange plate is provided with an outer cooling water inlet; two ends of the cooling inner pipe respectively penetrate out of the refrigerant heat exchange channel, the bottom end of the cooling inner pipe is provided with an inner cooling water inlet, and the top end of the cooling inner pipe is provided with an inner cooling water outlet; the cooling water inlet of the cooling outer pipe of the heat exchange plates is connected with an external cooling water inlet shunt pipe; the external cooling water inlet flow dividing pipe is also connected with a cooling auxiliary pipe; the inner cooling water inlets of the plurality of cooling inner pipes are connected with a cooling main pipe, and the inner cooling water outlets are connected with an inner cooling water outlet header; the internal cooling effluent collecting pipe is communicated with the cooling secondary pipe.
Further, the air-cooled heat exchanger is connected with a second refrigerant steam main pipe and a second refrigerant liquid main pipe; the first refrigerant steam main pipe and the second refrigerant steam main pipe are connected in parallel and then connected with the refrigerant operation assembly, and the first refrigerant liquid main pipe and the second refrigerant liquid main pipe are connected in parallel and then connected with the refrigerant operation assembly; the first refrigerant steam main pipe is provided with a first electromagnetic valve, and the second refrigerant steam main pipe is provided with a second electromagnetic valve.
Furthermore, the unit also comprises a water tank; a water pump is arranged in the water tank; and the water outlet end of the water pump is communicated with the cooling main pipe and is used for sending cooling water in the water tank into the cooling inner pipe of the evaporative cooling heat exchanger through the cooling main pipe and sending the cooling water into the outer cooling pipe through the cooling auxiliary pipe.
Further, the water tank is also provided with a water replenishing port; the bottom of the water tank is also connected with a sewage discharge pipe; and a sewage discharge electromagnetic valve is arranged on the sewage discharge pipe.
Furthermore, a cooling filler layer is arranged between the evaporative cooling heat exchanger and the water tank and is used for cooling the unevaporated water dropping from the evaporative cooling heat exchanger and discharging the unevaporated water into the water tank.
Further, the refrigerant operation assembly comprises a compressor, a four-way valve, a first electromagnetic valve, a second electromagnetic valve, a first one-way valve, a liquid storage tank, a drying filter, an economizer, a first expansion valve, a second one-way valve, a gas-liquid separator, a third electromagnetic valve, a second expansion valve, a third one-way valve and a fourth one-way valve; the unit also comprises a multi-connected indoor unit; the compressor is provided with an air outlet, an air return port and an enthalpy increasing port; the four-way valve is provided with an a end, a b end, a c end and a d end; the economizer is provided with an e end, an f end, a g end and an h end, wherein the e end is communicated with the f end in the economizer, and the g end is communicated with the h end in the economizer; the multi-connected indoor unit is provided with a j end and a k end, and the j end and the k end are two ports of a refrigerant channel of the multi-connected indoor unit.
Further, an air outlet of the compressor, an end a and an end b of the four-way valve, a pipeline in which the first refrigerant steam main pipe/the second refrigerant steam main pipe are connected in parallel, a first refrigerant steam main pipe and a first electromagnetic valve of the evaporative cooling heat exchanger, a first one-way valve, a liquid storage tank, a drying filter, an h end and an end g of an economizer, a first expansion valve, a second one-way valve, a j end and an end k of the multi-connected indoor unit, a d end and an end c of the four-way valve, a gas-liquid separator and a return air port of the compressor are communicated to form a first refrigeration operation channel.
Further, an air outlet of the compressor, an end a and an end b of the four-way valve, a pipeline in which the first refrigerant steam main pipe/the second refrigerant steam main pipe are connected in parallel, a second refrigerant steam main pipe and a second electromagnetic valve of the air-cooled heat exchanger and a second refrigerant liquid main pipe, a first one-way valve, a liquid storage tank, a drying filter, an h end and an end g of the economizer, a first expansion valve, a second one-way valve, a j end and an end k of the multi-connected indoor unit, a d end and an end c of the four-way valve, a gas-liquid separator and a gas return port of the compressor are sequentially communicated to form a second refrigeration operation channel.
Further, an air outlet of the compressor, an a end and a d end of the four-way valve, a k end and a j end of the multi-connected indoor unit, a third one-way valve, a liquid storage tank, a drying filter, an h end and a g end of the economizer, a first expansion valve, a fourth one-way valve, a pipeline in which a first refrigerant liquid main pipe/a second refrigerant liquid main pipe are connected in parallel, a first refrigerant liquid main pipe and a first refrigerant steam main pipe of the evaporative cooling heat exchanger, a first electromagnetic valve, a b end and a c end of the four-way valve, a gas-liquid separator and a return air port of the compressor are sequentially communicated to form a first heating operation channel.
Further, an air outlet of the compressor, an a end and a d end of the four-way valve, a k end and a j end of the multi-connected indoor unit, a third one-way valve, a liquid storage tank, a drying filter, an h end and a g end of the economizer, a first expansion valve, a fourth one-way valve, a pipeline in which a first refrigerant liquid main pipe/a second refrigerant liquid main pipe are connected in parallel, a second refrigerant liquid main pipe and a second refrigerant steam main pipe of the air-cooling heat exchanger, a second electromagnetic valve, a b end and a c end of the four-way valve, a gas-liquid separator and a return air port of the compressor are sequentially communicated to form a second heating operation channel.
Furthermore, in the first heating operation channel and the second heating operation channel, an outlet of the drying filter, the second expansion valve, an e end and an f end of the economizer, the third electromagnetic valve and an enthalpy-increasing port of the compressor are sequentially communicated to form an auxiliary enthalpy-increasing loop; and an internal channel between the e end and the f end in the economizer exchanges heat with an internal channel between the h end and the g end.
Furthermore, the unit also comprises a shell, and the top of the shell is provided with a vent; a fan is arranged in the ventilation opening; the evaporative cooling heat exchanger and the cooling filler layer are sequentially arranged below the fan; the air-cooled heat exchanger is arranged on the outer side of the evaporative cooling heat exchanger; the water tank is arranged below the evaporative cooling heat exchanger and the air-cooling heat exchanger, and the side wall of the shell corresponding to the air-cooling heat exchanger is also provided with a ventilation grating; a water-stop sheet is also arranged between the fan and the evaporative cooling heat exchanger; an equipment chamber is also arranged below the water tank in the machine shell; the refrigerant operation assembly is installed in the equipment room, and the equipment room is also internally provided with an electric cabinet for controlling the fan, the water pump, the compressor, the four-way valve, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve.
Furthermore, the unit does not comprise a multi-connected indoor unit, and is connected with the indoor heat exchanger; the indoor heat exchanger comprises an outdoor heat exchanging part and an indoor heat exchanging part; the outdoor heat exchange part is communicated with the indoor heat exchange part through a cold-carrying agent channel; the outdoor heat exchange part also comprises a refrigerant heat exchange channel for exchanging heat with the secondary refrigerant channel; the refrigerant heat exchange channel is provided with an m end and an n end, and the m end and the n end are respectively connected with the refrigerant operation assembly instead of the j end and the k end of the multi-connected indoor unit; the outdoor heat exchanging part is arranged in an equipment room in the unit.
The invention has the advantages that: the invention relates to a cascade evaporation cold and hot pump module unit, which adopts the design that an air-cooled heat exchanger and an evaporation cold heat exchanger are connected in parallel, can not only refrigerate through air and water, but also heat through air and industrial waste heat and wastewater; the design of the adopted overlapping evaporative cooling heat exchanger integrates the shell-and-tube closed convection heat exchange and the open evaporative cooling heat exchange, changes the restriction of single heat exchange area on the same side between two media of the traditional heat exchanger, and utilizes two heat exchange surfaces of an inner tube and an outer tube to exchange heat, thereby increasing the heat exchange area of a refrigerant; the same heat exchanger realizes two heat exchange modes of water-cooling heat exchange and evaporative cooling heat exchange simultaneously, secondary heat exchange of cooling water and a refrigerant achieves a cascade heat exchange effect, heat exchange efficiency can be greatly improved, the volume of the heat exchanger is reduced, water is saved, and maintenance is facilitated; the single unit is small in size and convenient to transport and install, and the multi-unit parallel modular installation can replace a traditional large water-cooling water chilling unit, so that the operation stability of the whole air-conditioning system is improved; the unit can be directly installed on the roof of a roof, a special machine room is not needed, the construction amount of installation engineering is reduced, and the construction difficulty is reduced; the noise generated by the whole unit can be controlled below 65Pb, the unit does not need to be subjected to additional noise reduction treatment, and the use cost is reduced.
Drawings
Fig. 1 is a schematic view of a cascade evaporation cold-heat pump module unit according to a first embodiment;
fig. 2 is a schematic diagram of a refrigerant operation assembly of the cascade evaporation cold-hot pump module unit according to the first embodiment;
fig. 3 is a schematic perspective view of an evaporative cooling heat exchanger of a cascade evaporative cooling heat pump module unit according to a first embodiment;
FIG. 4 is a schematic diagram of a heat exchange plate of an evaporative cooling heat exchanger of a cascade evaporative cooling heat pump module unit according to a first embodiment
Fig. 5 is a schematic view of the internal structure of the heat exchange plate of the evaporative cooling heat exchanger of the cascade evaporative cooling heat pump module unit according to the first embodiment;
fig. 6 is a schematic cross-sectional view of an uppermost heat exchange unit of the heat exchange plates of the evaporative cooling heat exchanger of the cascade evaporative cooling heat pump module unit according to the first embodiment;
fig. 7 is a schematic cross-sectional view of two adjacent heat exchange units of the heat exchange plate of the evaporative cooling heat exchanger of the cascade evaporative cooling heat pump module unit according to the first embodiment;
fig. 8 is a schematic cross-sectional view of two adjacent heat exchange units of the heat exchange plates of the evaporative cooling heat exchanger of the cascade-type evaporative cooling heat pump module unit according to the second embodiment;
fig. 9 is a schematic cross-sectional view of two adjacent heat exchange units of the heat exchange plates of the evaporative cooling heat exchanger of the cascade-type evaporative cooling heat pump module unit according to the third embodiment;
fig. 10 is a schematic cross-sectional view of two adjacent heat exchange units of the heat exchange plates of the evaporative cooling heat exchanger of the cascade-type evaporative cooling heat pump module unit according to the fourth embodiment;
fig. 11 is a schematic view of a cascade evaporation heat pump module unit according to the fifth embodiment;
fig. 12 is a schematic view of a refrigerant operation assembly of the cascade evaporation heat and cold pump module unit according to the fifth embodiment.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example one
As shown in fig. 1 to 7, the present embodiment provides a cascade evaporation cooling heat pump module unit, which includes an evaporation cooling heat exchanger 2, an air cooling heat exchanger 3, and a refrigerant operation assembly 6; the evaporative cooling heat exchanger 2 and the air cooling heat exchanger 3 are connected in parallel and then are connected with a refrigerant operation assembly 6; the refrigerant operation assembly 6 is used for operating the refrigerant to exchange heat in the evaporative cooling heat exchanger 2 or the air cooling heat exchanger 3; the evaporative cooling heat exchanger 2 comprises a plurality of heat exchange plates; the plurality of heat exchange plates are arranged at intervals along the direction vertical to the evaporation heat exchange surface; each heat exchange plate comprises at least one heat exchange unit; the heat exchange unit is a plate-shaped structure formed by vertically arranging a plurality of condenser pipe horizontal sections 205, two ends of the condenser pipe horizontal sections 205 are connected through condenser pipe bending sections 214 to form at least one refrigerant heat exchange channel, and two surfaces of the plate-shaped structure form evaporation heat exchange surfaces; in the plate-shaped structure, two adjacent horizontal sections 205 of the plurality of vertical horizontal sections 205 of the condensing tube are connected without a gap (namely, the minimum distance is kept between the adjacent heat exchange tubes), so that the evaporation heat exchange surface has continuity and is in a concave-convex shape; a bracket 206 is also arranged in the water distribution tank 1 between the cooling outer pipe 203 and the horizontal section 205 of the condensing pipe; a cooling outer pipe 203 is arranged above the horizontal section 205 of the uppermost condensing pipe; a water distribution groove 201 is also arranged between the cooling outer pipe 203 and the uppermost horizontal section 205 of the condensing pipe; a water distribution microporous plate 202 is arranged on two sides of the water distribution tank 201; the upper end of the water distribution microporous plate 202 is connected with the pipe wall of the cooling outer pipe 203, and the lower end is connected with the pipe wall of the horizontal section 205 of the uppermost condensing pipe, so that the water distribution tank 201 is fixed between the cooling outer pipe 203 and the heat exchange unit in an embedded manner to form an integrated structure; the cooling outer pipe 203 is provided with a plurality of water outlet holes 204 which are communicated with the water distribution tank 201 and used for uniformly injecting water into the water distribution tank 201; the water distribution tank 201 is used for uniformly distributing water injected into the cooling outer pipe 203 on the evaporation heat exchange plate surface through a water distribution microporous plate to form a water curtain to exchange heat with the refrigerant at the outer side of the refrigerant heat exchange channel; a cooling inner tube 207 is further arranged in the refrigerant heat exchange channel in a penetrating manner, and water passing through the cooling inner tube 207 exchanges heat with the refrigerant on the inner side of the refrigerant heat exchange channel.
In the evaporative cooling heat exchanger 2, an inner sleeve single tube S-shaped coiling mode is adopted, the circle centers of the cross sections of the straight tube sections are on the same straight line (vertically arranged), and the minimum distance is kept between the adjacent heat exchange tubes, so that a heat exchange plane whole body formed by the straight tube sections and the bent tube sections, namely a plate surface structure, is formed. The uppermost end of the surface of the heat exchanger is provided with a cooling outer pipe which is parallel to the heat exchange pipe and has the same pipe diameter, and the lower end of the wall of the cooling outer pipe is provided with water outlet holes which are densely arranged. A certain distance is kept between the cooling outer pipe and the heat exchange pipe, a water distribution microporous plate is fixed between the two pipes along the tangential direction of the cooling outer pipe and the outer wall of the heat exchange pipe to form a water distribution tank, and sealing plates are arranged at two ends of the water distribution tank; the water distribution tank forms an invisible water distributor which is integrated with the whole heat exchange surface and consists of a cooling outer pipe, an adjacent condensation pipe and a water distribution microporous plate. The water distribution tank and the heat exchange tubes arranged at the lower end of the water distribution tank in sequence form a heat exchange unit. Through the design, a refrigerant heat exchange channel is formed between the inner wall of the condensing tube and the outer wall of the cooling inner tube, a first heat exchange channel of cooling water is formed in the cooling inner tube, and a second heat exchange channel for evaporating the cooling water is formed on a heat exchange plate surface where the outer wall of the condensing tube is located; the refrigerant heat exchange channel is provided with an inner heat exchange surface and an outer heat exchange surface.
In the cascade evaporation cooling heat pump module unit of the embodiment, the adopted evaporation cooling heat exchanger 2 is divided into two heat exchange processes: the first heat exchange process is a heat transfer process of water and a refrigerant, which is a traditional shell-and-tube heat transfer process, and heat is transferred to a refrigerant medium on the outer side of the cooling inner tube in a closed space through the tube wall of the cooling inner tube; the second heat exchange process is an evaporation cooling heat exchange process, cooling water heated by heat exchange in the first heat exchange process enters the cooling outer pipe, the cooling water overflows through the water distribution tank and is uniformly distributed on the whole heat exchange surface, a refrigerant in the pipe transfers heat to the cooling water through the heat exchange plate surface, the cooling water evaporates to generate supersaturated steam, the supersaturated steam is discharged into the atmosphere under the action of the fan, the heat exchange is an evaporation cooling heat exchange mode, the whole heat exchange process is carried out in an open space under normal pressure, and the refrigerant and the cooling water outside the pipe and in the inner pipe can be fully condensed by heat exchange at the same time.
In the evaporative cooling heat exchanger 2, the cooling outer pipe, the adjacent condensing pipes with a certain distance and the water distribution microporous plate vertically tangent to the outer walls of the two adjacent pipes form an embedded hidden water distribution tank. After the cooling water is conveyed to the cooling outer pipe, as the cooling outer pipe is provided with a plurality of rows of water outlet holes, the cooling water is uniformly sprayed in the whole water distribution tank. The air pressure in the water distribution tank is equal to the external atmospheric pressure, and the cooling water keeps a pressure equalizing state under the dual actions of gravity and atmospheric pressure; the cooling water can flow down under self gravity and flow uniformly distributed on the evaporation heat exchange plate surface through the water distribution microporous plate, and a thin-layer water curtain (water curtain) from top to bottom is formed. Due to the surface tension of water, cooling water is continuously and directly adhered to the whole evaporation heat exchange plate surface without gaps, and a water film is fully extended, thin and uniform, so that the evaporation efficiency is improved; free water is not generated, and the phenomena of water flying and water floating can be avoided to the maximum extent.
In the cascade evaporation cold-heat pump module unit of this embodiment, the processing method of the water distribution tank 201 of the evaporation cold heat exchanger 2 is as follows: the water distribution microporous plate can be directly welded between the arranged cooling outer pipes and the arranged condensing pipes, and the two ends of the water distribution groove in the length direction are sealed by the sealing plates to form an integral structure; the material of the water distribution microporous plate can be copper, aluminum, stainless steel, alloy or other metal materials which are convenient for making a net or opening holes; the water level in the water distribution tank is controlled by controlling the water inflow of the cooling outer pipe, so that the supply amount of cooling water is the lowest without surplus under the premise of ensuring sufficient water spraying at the bottom end of the heat exchange unit, and the aim of accurate water distribution is fulfilled; and because the cooling water and the refrigerant carry out twice heat exchange, the carrying capacity of the cooling water heat exchange is greatly improved, the cooling water circulation is reduced, the volume of a water tank for supplying the cooling water is reduced, and the miniaturization of a unit adopting the heat exchanger is facilitated.
In the evaporative cooling heat exchanger 2 adopted in the cascade evaporative cooling heat pump module unit of the embodiment, the outer wall of the condensing tube forms a complete and continuous heat exchange plate surface, and the M-shaped concave-convex interphase curved surface structure (concave-convex shape) formed on the outer wall of the condensing tube increases the heat exchange area and has higher heat exchange amount; the M-shaped concave-convex alternate curved surface can prolong the drainage time of cooling water on the plate surface, the flow speed and the flow direction of the cooling water between the concave surface and the convex surface are continuously changed, the occurrence of turbulent flow forms disturbance effect on a cooling water film, the heat exchange coefficient of an evaporation surface is increased, and the heat exchange efficiency is improved; therefore, under the condition of the same heat exchange quantity, the volume of the evaporative cooling heat exchanger in the unit is smaller, the overall volume of the unit is correspondingly greatly reduced, and the aim of miniaturization is fulfilled.
In the cascade evaporation cold-hot pump module unit of the embodiment, the evaporation cold heat exchanger adopts a mode that a plurality of heat exchange plates are arranged at intervals along the direction vertical to the evaporation heat exchange surface, and enough gaps are kept among the heat exchange plates to form a channel convenient for air circulation, so that the unit is convenient to clean and maintain.
In the cascade evaporation cold and heat pump module unit of the embodiment, the evaporation cold heat exchanger is used as a basis, the air-cooled heat exchanger is additionally arranged in parallel with the evaporation cold heat exchanger, the heat pump heating function of the water-cooled (evaporation cold) water chilling unit is realized, the current situation that the traditional water-cooled water chilling unit only refrigerates but does not heat is changed, and the use function of the water-cooled water chilling unit is expanded.
In an evaporative cooling heat exchanger employed in the cascade evaporative cooling heat pump module unit according to this embodiment, the heat exchange plate includes a plurality of heat exchange units according to the first embodiment; the heat exchange units are vertically arranged, and two adjacent heat exchange units are connected through the bent sections 214 of the condensation pipes, so that the respective refrigerant heat exchange channels are correspondingly communicated. The outer diameter of the cooling outer pipe 203 between two adjacent heat exchange units is the same as that of the condensation pipe. The connection mode of the cooling outer pipe 203, the water distribution groove 201 and the water distribution microporous plate 202 is the same as that of the water distribution groove; in addition, the top of the cooling outer pipe 203 in the heat exchange unit at the lower side in the two adjacent heat exchange units is connected with the bottom of the horizontal section 205 of the lowest condensing pipe of the heat exchange unit at the upper side; a plurality of the brackets 206 are arranged at intervals between the bottom of the cooling outer pipe 203 and the top of the uppermost horizontal section 205 of the condensing pipe of the heat exchange unit.
In the cascade evaporation cold and heat pump module unit of the embodiment, a sectional design of a plurality of heat exchange units is adopted, each heat exchange plate is divided into a plurality of independent evaporation cooling heat exchange units by the water distribution tank, and each heat exchange unit only needs to ensure the minimum water spraying amount of the unit, so that a water film distributed on the surface of the condensation heat exchange plate is thin enough, and evaporation of cooling water are facilitated; the design of the sectional spraying unit type not only keeps the integrity of the water film of the whole plate surface, but also ensures that the water spraying of each heat exchange unit is minimum and the water film is thinnest.
In the cascade evaporation cold-hot pump module unit of this embodiment, in two adjacent heat exchange units, the number of the horizontal sections 205 of the condensing tube in the heat exchange unit located at the lower side is smaller than the number of the horizontal sections 205 of the condensing tube in the heat exchange unit located at the upper side, so that the heat exchange areas of the evaporation heat exchange surfaces of the plurality of heat exchange units decrease from top to bottom; the number of the water outlet holes 204 of the cooling outer pipe 203 in the heat exchange unit at the lower side is smaller than that of the water outlet holes 204 of the cooling outer pipe 203 at the upper side (the distance between the water outlet holes along the length direction of the cooling outer pipe is increased), so that the water distribution requirement of the evaporation heat exchange surface corresponding to the heat exchange area is met. The refrigerant cools layer by layer from top to bottom in the refrigerant condensing channel, the upper side is a high-temperature area, the evaporation capacity is large, the area of the evaporation heat exchange surface on the upper side is correspondingly large, and sufficient water distribution quantity is provided; the lower side is a low-temperature area, the evaporation capacity is relatively reduced, and the area of an evaporation heat exchange surface and the water distribution capacity are correspondingly reduced (the number of holes for cooling the outer pipe is reduced layer by layer); the degressive design mode can fully utilize the advantages of sectional type design, can ensure that the corresponding heat exchange units are fully distributed with water, can also ensure that the water distribution quantity of the heat exchange units is minimum, and prevents the unvaporized cooling water of the heat exchange units positioned at the upper side from accumulating to the heat exchange units positioned at the lower side; ensure that the water films of the heat exchange units are uniform and thin, and save more water.
In the cascade evaporation cold and heat pump module unit according to this embodiment, a refrigerant vapor inlet is formed at the top end of a refrigerant heat exchange channel of the heat exchange plate, and a refrigerant liquid outlet is formed at the bottom end of the refrigerant heat exchange channel; one end of the cooling outer pipe 203 of the heat exchange plate is provided with an outer cooling water inlet; two ends of the cooling inner pipe 207 respectively penetrate out of the refrigerant heat exchange channel, the bottom end of the cooling inner pipe is provided with an inner cooling water inlet, and the top end of the cooling inner pipe is provided with an inner cooling water outlet; the refrigerant steam inlet is connected with a first refrigerant steam main pipe 208, the refrigerant liquid outlet is connected with a first refrigerant liquid main pipe 210, and the external cooling water inlet of the cooling outer pipe 203 is connected with an external cooling water inlet shunt pipe 209; the external cooling water inlet shunt pipe 209 is also connected with a cooling auxiliary pipe 211; an inner cooling water inlet of the cooling inner pipe 207 is connected with a cooling main pipe 212, and an inner cooling water outlet is connected with an inner cooling water collecting pipe 213; the internal cooling effluent collecting pipe 213 communicates with the cooling sub-pipe 211.
In the cascade evaporation cold and heat pump module unit according to this embodiment, the air-cooled heat exchanger 3 is connected to a second refrigerant steam main pipe 301 and a second refrigerant liquid main pipe 302; the first refrigerant steam main pipe 208 and the second refrigerant steam main pipe 301 are connected in parallel and then connected with the refrigerant operation assembly 6, and the first refrigerant liquid main pipe 210 and the second refrigerant liquid main pipe 302 are connected in parallel and then connected with the refrigerant operation assembly 6; the first refrigerant steam main pipe 208 is provided with a first electromagnetic valve 603, and the second refrigerant steam main pipe 301 is provided with a second electromagnetic valve 604.
In the cascade evaporation cold and heat pump module unit of this embodiment, the unit further includes a water tank 5; a water pump 501 is arranged in the water tank 5; the water outlet end of the water pump 501 is communicated with the cooling main pipe 212 and is used for sending the cooling water in the water tank 5 into the evaporative cooling heat exchanger 2 through the cooling main pipe 212; the water tank 5 is also provided with a water replenishing port 502; the bottom of the water tank 5 is also connected with a sewage discharge pipe 503; a blowdown electromagnetic valve 504 is arranged on the blowdown pipe 503; and a cooling filler layer 4 is also arranged between the evaporative cooling heat exchanger 2 and the water tank 5 and is used for cooling the unevaporated water dropping from the evaporative cooling heat exchanger 2 and discharging the unevaporated water into the water tank 5.
In the cascade evaporation cold-hot pump module unit of this embodiment, the refrigerant operation assembly 6 includes a compressor 601, a four-way valve 602, a first solenoid valve 603, a second solenoid valve 604, a first one-way valve 605, a liquid storage tank 606, a drying filter 607, an economizer 608, a first expansion valve 609, a second one-way valve 610, a gas-liquid separator 611, a third solenoid valve 612, a second expansion valve 613, a third one-way valve 614, and a fourth one-way valve 615; the units also include a multi-connected indoor unit 12 (fluorine machine); the compressor 601 is provided with an air outlet, an air return port and an enthalpy increasing port; the four-way valve 602 has an a end, a b end, a c end, and a d end; the economizer 608 has an e end, an f end, a g end and an h end, wherein the e end and the f end are communicated in the economizer 608, and the g end and the h end are communicated in the economizer 608; the multi-connected indoor unit 12 has a j end and a k end, and the j end and the k end are two ports of a refrigerant channel of the multi-connected indoor unit;
the air outlet of the compressor 601, the end a and the end b of the four-way valve 602, the parallel pipeline of the first refrigerant steam main pipe 208/the second refrigerant steam main pipe 301, the first refrigerant steam main pipe 208 and the first electromagnetic valve 603 of the evaporative cooling heat exchanger 2, the first refrigerant liquid main pipe 210, the first check valve 605, the liquid storage tank 606, the drying filter 607, the h end and the g end of the economizer, the first expansion valve 609, the second check valve 610, the j end and the k end of the multi-connected indoor unit 12, the d end and the c end of the four-way valve, the gas-liquid separator 611 and the return air port of the compressor 601 are communicated to form a first refrigeration operation channel;
an air outlet of the compressor 601, an end a and an end b of the four-way valve 602, a pipeline formed by connecting the first refrigerant steam main pipe 208/the second refrigerant steam main pipe 301 in parallel, a second refrigerant steam main pipe 301 and a second electromagnetic valve 604 of the air-cooled heat exchanger 3 with the second refrigerant liquid main pipe 302, a first one-way valve 605, a liquid storage tank 606, a drying filter 607, an h end and a g end of an economizer, a first expansion valve 609, a second one-way valve 610, a j end and a k end of the multi-connected indoor unit 12, a d end and a c end of the four-way valve, a gas-liquid separator 611 and a return air inlet of the compressor 601 are sequentially communicated to form a second refrigeration operation channel;
an air outlet of the compressor 601, an a end and a d end of the four-way valve 602, a k end and a j end of the multi-connected indoor unit 12, a third one-way valve 614, a liquid storage tank 606, a drying filter 607, an h end and a g end of the economizer, a first expansion valve 609, a fourth one-way valve 615, a pipeline in parallel connection with the first refrigerant liquid main pipe 210/the second refrigerant liquid main pipe 302, a first refrigerant liquid main pipe 210 and a first refrigerant steam main pipe 208 of the evaporative cooling heat exchanger 2, a first electromagnetic valve 603, a b end and a c end/gas-liquid separator 611 of the four-way valve 602, and a return air port of the compressor 601 are sequentially communicated to form a first heating operation channel;
an air outlet of the compressor 601, an a end and a d end of the four-way valve 602, a k end and a j end of the multi-connected indoor unit 12, a third one-way valve 614, a liquid storage tank 606, a drying filter 607, an h end and a g end of the economizer, a first expansion valve 609, a fourth one-way valve 615, a pipeline formed by connecting the first refrigerant liquid main pipe 210/the second refrigerant liquid main pipe 302 in parallel, a second refrigerant liquid main pipe 302 and a second refrigerant steam main pipe 301 of the air-cooled heat exchanger 3, a second electromagnetic valve 604, a b end and a c end of the four-way valve 602, a gas-liquid separator 611 and a return air inlet of the compressor 601 are sequentially communicated to form a second heating operation channel;
in the first heating operation channel and the second heating operation channel, an outlet of the dry filter 607, the second expansion valve 613, the e end and the f end of the economizer, the third electromagnetic valve 612 and an enthalpy-increasing port of the compressor 601 are sequentially communicated to form an auxiliary enthalpy-increasing loop; and an internal channel between the e end and the f end in the economizer exchanges heat with an internal channel between the h end and the g end.
In the cascade evaporation cold and heat pump module unit of the embodiment, the unit further includes a casing 1, and a vent 11 is disposed at the top of the casing 1; a fan 7 is arranged in the ventilation opening 11; the evaporative cooling heat exchanger 2 and the cooling filler layer 4 are sequentially arranged below the fan 7; the air-cooled heat exchanger 3 is arranged at the outer side of the evaporative cooling heat exchanger 2; the water tank 5 is arranged below the evaporative cooling heat exchanger 2 and the air cooling heat exchanger 3, and the side wall of the casing 1 corresponding to the air cooling heat exchanger 3 is also provided with a ventilation grating 9; a water-stop sheet 8 is also arranged between the fan 7 and the evaporative cooling heat exchanger 2; an equipment chamber is also arranged below the water tank 5 in the machine shell 1; the refrigerant operation assembly 6 is installed in an equipment room, and an electric cabinet 10 is further arranged in the equipment room and used for controlling the fan 7, the water pump 501, the compressor 601, the four-way valve 602, the first electromagnetic valve 603, the second electromagnetic valve 604 and the third electromagnetic valve 612.
In the cascade evaporation cold-hot pump module unit, the evaporation cold heat exchanger is integrated, water curtain and cascade design, so that the evaporation capacity of cooling water is improved, the circulation capacity of the cooling water is reduced, the power consumption of a cooling circulating pump is further reduced, the water distribution is finer by a sectional design and a step unit type water distribution mode, and the cooling function can be met by only small-flow cooling water circulation; the water distribution groove which is embedded and hidden realizes water curtain type water distribution, thereby avoiding the existence of free water and avoiding the generation of water flying; the cooling water circulation volume is reduced, so that the air volume and the air speed of the fan are reduced, the phenomena of 'water flying' and 'water floating' can be avoided to the maximum extent, the water is saved, the volume of a cooling water tank is reduced due to the reduction of the cooling water circulation volume, and the volume of a unit is reduced; the heat exchange efficiency of the unit is higher, the size is smaller, and the miniaturization of the unit is realized.
In the cascade evaporation cold and hot pump module unit of the embodiment, a screw or a centrifugal compressor is changed into a scroll compressor or a low-power screw compressor, and the whole refrigerant circulating system of the unit is internally arranged in a cooling tower matched with the unit to form an integrated unit with a highly integrated heat exchange system and a cooling system, so that the miniaturization and modularization (the consumed power is 5KW-40KW) of the unit is realized; after modularization, the single machine occupies 2-3 square meters, the weight is reduced to about 0.5T, and the installation and transportation of the machine set are facilitated.
In the cascade evaporation cold and heat pump module unit, the cooling pipe network laying in the traditional water chilling unit engineering is omitted, the construction amount is reduced, and the construction difficulty is reduced; the lift of the built-in cooling water circulation system is close to 0, and the power of the cooling circulation pump is lower; an open heat exchange mode is adopted, and the power of the circulating pump is further reduced by utilizing the self gravity flow of water to exchange heat with a refrigerant; the embedded water curtain type water distribution is noiseless, and due to high heat exchange efficiency, the compressor adopts a small compressor to reduce the noise source intensity, the cooling water circulation volume is reduced, the fan power is reduced, the power of a cooling circulating pump is also effectively reduced, and the generated noise is further reduced; the noise pollution degree is integrally reduced and improved; the noise of the unit can be controlled below 65Pb and completely reaches the national standard, so that the problem of noise pollution is solved.
In the cascade evaporation cold and heat pump module unit of the embodiment, a heat pump technology is fused, the evaporation cold heat exchanger is additionally provided with the air-cooled heat exchanger, and the unit realizes the heating function of the air-cooled heat pump by sharing refrigerant circulation and other components, thereby achieving the purpose of one machine for two purposes.
In the cascade evaporation cold and heat pump module unit, the compressor can adopt a scroll compressor or a low-power screw compressor, the weight of a single unit is reduced to be less than 0.5 ton, the unit is miniaturized and modularized, and the unit can be conveniently installed and transported; the small modular unit can be arranged on the roof of a roof, and a special machine room is not needed, so that the indoor space is saved; the machine sets after a plurality of small-sized modularization operate simultaneously and are mutually standby, the maintenance of individual machine sets does not influence the overall operation, and the operation stability of the whole air conditioning system is improved.
In the cascade evaporation cold-heat pump module unit of this embodiment, the adopted evaporation cold heat exchanger has the following working principle: the cooling water enters from the inner cooling water inlet of the cooling inner pipe from the cooling main pipe and flows in the cooling inner pipe from bottom to top, and the refrigerant steam enters from the refrigerant steam inlet and flows in the refrigerant heat exchange channel from top to bottom to form the first heat exchange of the cooling water. The temperature of the refrigerant is gradually reduced in the process of flowing downwards, and the temperature of the cooling water moving upwards is gradually increased. The cooling water flows out from the inner cooling water outlet, enters the inner cooling water collecting pipe and then enters the cooling secondary pipe, is guided into the outer cooling water inlet flow dividing pipe by the cooling secondary pipe and then enters the cooling outer pipe from the outer cooling water inlet, and then enters the water distribution tank through the water outlet holes of the cooling outer pipe. The air pressure in the water distribution tank is equal to the external atmospheric pressure, and the cooling water keeps a pressure equalizing state under the dual actions of gravity and atmospheric pressure; the cooling water can flow under the self gravity flow and is uniformly distributed on the evaporation heat exchange plate surface through the water distribution net to form a thin water film (water curtain) from top to bottom, the cooling water and the refrigerant of the refrigerant heat exchange channel are subjected to secondary heat exchange and then are vaporized and evaporated to take away more heat, and the temperature of the refrigerant in the pipe is further reduced; cooling water absorbs heat and is evaporated on the surface of the condenser, and saturated steam formed by evaporation is discharged into the atmosphere under the action of a fan; the cooling water which is not evaporated is heated up after being subjected to heat convection with refrigerant steam in the condenser pipe, and drops in the cooling filler arranged at the lower part of the evaporative condenser along the two sides of the heat exchange surface through the bottom end of the heat exchange surface under the state of self gravity flow. The evaporative condenser at this moment serves as the water distribution function in the cooling water cooling condensation process, the cooling water that drips along the bottom of the whole evaporative condenser evenly drips to the top of the cooling filler on the lower part of the evaporative condenser, the cooling water forms a very thin water film on the surface of the cooling filler again when flowing downwards, the cooling water film on the surface of the filler exchanges heat with the ambient air that sweeps over the surface of the filler under the action of the fan, the cooling water is cooled after being cooled, the air is discharged to the atmosphere through the fan after being heated, and the filler has the cooling function at this moment. The cooled cooling water uniformly drops on the surface of the whole cooling water tank along the horizontal lower surface of the whole cooling filler, and the cooling water with lower temperature moves downwards under the action of a water pump and then enters the cooling inner pipes of the heat exchange units through the cooling main pipe to enter the next cooling circulation.
In the cascade evaporation cold and hot pump module unit of this embodiment, including the refrigeration mode of evaporation cold heat exchanger, the refrigeration mode of air cooled heat exchanger, the mode of defrosting of air cooled heat exchanger, the mode of heating of evaporation cold heat exchanger, specific mode flow is as follows:
refrigeration mode of evaporative cooling heat exchanger
In this mode, the water replenishment port of the water tank is switched to the cooling water port.
A refrigerant flow: the second electromagnetic valve and the third electromagnetic valve are closed, the first electromagnetic valve is opened, the a end of the four-way valve is communicated with the b end, and the c end is communicated with the d end; the compressor is electrified to work, high-temperature and high-pressure refrigerant steam is sprayed out from the air outlet of the compressor, enters the heat exchange units of the evaporative cooling heat exchanger through the first refrigerant steam main pipe through the first electromagnetic valve after entering the end a and exiting the end b of the four-way valve, and is subjected to heat exchange cooling with water of the cooling inner pipe and a water curtain formed by the cooling outer pipe; the cooling water of the water curtain exchanges heat with refrigerant steam in the evaporative cooling heat exchanger to heat, vaporize and evaporate, part of the cooling water is changed from liquid state to gaseous state, and the cooling water is discharged to the outdoor atmosphere through a fan in the form of latent heat of vaporization of the water; the low-temperature high-pressure liquid refrigerant condensed and liquefied by the evaporative cooling heat exchanger passes through the first refrigerant liquid main pipe, then enters the liquid storage tank through the first one-way valve, continues to pass through the drying filter, enters through the h end of the economizer and exits through the g end, and is throttled and decompressed by the first expansion valve, so that the pressure and the temperature of the refrigerant are reduced; the throttled low-temperature low-pressure liquid refrigerant enters from the j end and exits from the k end of the multi-connected indoor unit through the second one-way valve and exchanges heat with indoor air in a refrigerant channel in the multi-connected indoor unit, the low-temperature low-pressure liquid refrigerant absorbs heat, is vaporized and evaporated into refrigerant steam, the refrigerant steam enters from the d end and exits from the c end of the four-way valve, enters a return air port of the compressor through the gas-liquid separator and is compressed, and a refrigerant circulation process is completed.
In the mode, the water pump starts the compressor preferentially, and the fan starts after a set time interval; the cooling water with lower temperature in the water tank enters the cooling inner pipe of each heat exchange unit of the evaporative cooling heat exchanger through the cooling main pipe under the action of the water pump, the cooling inner pipe enters the cooling auxiliary pipe after exchanging heat with refrigerant steam, then enters the cooling outer pipe of each heat exchange unit of the evaporative cooling heat exchanger, and then is evenly distributed on the surface of each heat exchange plate after passing through the water distribution grooves of each heat exchange unit to form a layer of water film, the surface temperature of each heat exchange plate is about 90 ℃, so the cooling water is heated and quickly vaporized and evaporated, thereby the heat of a large amount of refrigerants is directly taken away, the cooling water which is not vaporized and each heat exchange plate carry out heat convection and heat transfer, and then drops to the upper part of the cooling filler layer below, the cooling water forms a thin water film from top to bottom under the action of gravity along the surface of the cooling filler layer, and the water vapor on the surface of the water film is atomized in an oversaturat, the atomized water vapor is discharged under the action of a fan and is transferred to the atmosphere in a latent heat manner; the unvaporized cooling water with higher temperature carries out convective heat exchange with the cooling filler layer and carries out radiation heat exchange with air; as the cooling water sinks along the cooling filler layer, the temperature is gradually reduced, and finally all heat is discharged to the atmosphere through the fan; and the cooled cooling water with lower temperature uniformly drops to the upper surface of the cooling water tank along the bottom surface of the cooling filler layer to complete a water circulation process.
Refrigeration mode of air-cooled heat exchanger
A refrigerant flow: the first electromagnetic valve and the third electromagnetic valve are closed, the second electromagnetic valve is opened, the a end of the four-way valve is communicated with the b end, and the c end is communicated with the d end; the compressor is electrified to work, high-temperature and high-pressure refrigerant steam is sprayed out from the air outlet of the compressor, enters the air-cooled heat exchanger through the end a and the end b of the four-way valve and enters the air-cooled heat exchanger through the second electromagnetic valve and the second refrigerant steam main pipe, the high-temperature and high-pressure refrigerant steam exchanges heat with circulating air flowing through the surface of the air-cooled heat exchanger, the refrigerant steam is cooled, liquefied and cooled, and hot air is exhausted to the outdoor atmosphere through the fan after the heat exchange and temperature rise; the condensed low-temperature high-pressure liquid refrigerant passes through the second refrigerant liquid main pipe, then enters the liquid storage tank through the first one-way valve, continues to pass through the drying filter, enters through the h end and exits through the g end of the economizer, and then is throttled and decompressed by the first expansion valve, so that the pressure and the temperature of the refrigerant are reduced; the throttled low-temperature low-pressure liquid refrigerant enters from the j end and exits from the k end of the multi-connected indoor unit through the second one-way valve and exchanges heat with indoor air in a refrigerant channel in the multi-connected indoor unit, the low-temperature low-pressure liquid refrigerant absorbs heat, is vaporized and evaporated into refrigerant steam, the refrigerant steam enters from the d end and exits from the c end of the four-way valve, enters a return air port of the compressor through the gas-liquid separator and is compressed, and a refrigerant circulation process is completed.
In the mode, the water pump is closed, the fan starts the compressor preferentially, and the evaporative cooling heat exchanger is in a standby state; because of the effect of fan, the unit is inside to be negative pressure state, and ambient air gets into the unit through the ventilation grid, and with the heat exchanger heat transfer of forced air cooling, the refrigerant is cooled off liquefaction cooling, and the air is heated and has taken away the refrigerant heat, discharges through the discharge port and shifts to the atmosphere in.
Defrosting mode of air-cooled heat exchanger
A refrigerant flow: the first electromagnetic valve and the third electromagnetic valve are closed, the second electromagnetic valve is opened, the a end of the four-way valve is communicated with the b end, and the c end is communicated with the d end; the compressor is electrified to work, high-temperature and high-pressure refrigerant steam is sprayed out from an air outlet of the compressor, enters the air-cooled heat exchanger through the a end and the b end of the four-way valve, enters the air-cooled heat exchanger through the second electromagnetic valve through the second refrigerant steam main pipe, exchanges heat with ice (frost) on the surface of the air-cooled heat exchanger, is cooled, liquefied and cooled, is heated with the refrigerant steam in the air-cooled heat exchanger, is divided into steam after being heated, is diffused and discharged to the outdoor atmosphere through natural flowing of air, and is mostly melted into water to flow back to the cooling water tank. The condensed low-temperature high-pressure liquid refrigerant passes through the second refrigerant liquid main pipe, then enters the liquid storage tank through the first one-way valve, continues to pass through the drying filter, enters through the h end and exits through the g end of the economizer, and then is throttled and decompressed by the first expansion valve, so that the pressure and the temperature of the refrigerant are reduced; the throttled low-temperature and low-pressure liquid refrigerant enters from the j end and exits from the k end of the multi-connected indoor unit through the second one-way valve and exchanges heat with indoor air in a refrigerant channel in the multi-connected indoor unit, the low-temperature and low-pressure liquid refrigerant absorbs heat to vaporize and evaporate into refrigerant steam, the refrigerant steam enters from the d end and exits from the c end of the four-way valve, and enters a return air port of the compressor through the gas-liquid separator and then is compressed, so that a refrigerant circulation process is completed; when the environment temperature is lower, the third electromagnetic valve is opened, part of the low-temperature high-pressure refrigerant liquid flowing through the drying filter passes through the second expansion valve and then passes through the end e of the economizer to be discharged, the part of the refrigerant liquid and the refrigerant liquid discharged from the end h of the economizer are subjected to heat absorption, temperature rise and vaporization, and the refrigerant steam passes through the third electromagnetic valve and then returns to the enthalpy increasing port of the compressor.
In this mode, the water pump is turned off, the fan is turned off, and the evaporative cooling heat exchanger is in a standby state.
Heating mode of four-air-cooled heat exchanger
A refrigerant flow: the first electromagnetic valve and the third electromagnetic valve are closed, the second electromagnetic valve is opened, the a end of the four-way valve is communicated with the d end, and the b end of the four-way valve is communicated with the c end; the compressor is electrified to work, high-temperature and high-pressure refrigerant steam enters from the end a and the end d of the four-way valve and then enters from the end k and the end j of the multi-connected indoor unit and exchanges heat with indoor air in a refrigerant channel in the multi-connected indoor unit, the high-temperature and high-pressure liquid refrigerant is condensed into a medium-temperature and medium-pressure liquid refrigerant after exchanging heat, the liquid refrigerant enters the liquid storage tank through the third one-way valve, and the medium-temperature and medium-pressure liquid refrigerant is continuously divided into two paths after passing through the drying filter: the first path enters from the h end and exits from the g end of the economizer, and the second path enters from the e end and exits from the f end of the economizer after being throttled and depressurized by a second expansion valve; two paths of refrigerants exchange heat in the economizer; the medium-temperature and medium-pressure liquid refrigerant in the first path is further condensed and cooled in the economizer, and then is throttled and decompressed by a first expansion valve to form a low-temperature and low-pressure liquid refrigerant; a low-temperature low-pressure liquid refrigerant enters the air-cooled heat exchanger through the fourth check valve and the second refrigerant liquid main pipe, the low-temperature low-pressure liquid refrigerant exchanges heat with circulating air flowing through the surface of the heat exchanger, the liquid refrigerant is heated and vaporized into refrigerant steam, then the refrigerant steam passes through the second refrigerant steam main pipe and the second electromagnetic valve, enters the b end and exits the c end of the four-way valve, passes through the gas-liquid separator and enters the air return port of the compressor for compression, and the main circulation process of the refrigerant is completed; the medium-temperature and medium-pressure liquid refrigerant of the second path is throttled and depressurized by a second expansion valve and then is further heated and vaporized in an economizer to form medium-temperature and low-pressure steam; the medium-temperature low-pressure steam returns to an enthalpy increasing port of the compressor after passing through a third electromagnetic valve, and an auxiliary enthalpy increasing cycle is completed.
In the mode, the water pump is closed, the fan starts the compressor preferentially, and the evaporative cooling heat exchanger is in a standby state; because of the effect of fan, the unit is inside to be negative pressure state, and ambient air gets into the unit through the ventilation grid, and with the heat exchanger heat transfer of forced air cooling, refrigerant liquid is by the vaporization intensification, and the air releases the heat and cools down, discharges through the discharge port and shifts to the atmosphere in, realizes the heat function of forced air cooling heat exchanger heat pump heating.
Heating mode of evaporative cooling heat exchanger
Under this mode, the moisturizing mouth of water tank switches to industry waste heat waste water interface.
A refrigerant flow: the second electromagnetic valve and the third electromagnetic valve are closed, the first electromagnetic valve is opened, the a end of the four-way valve is communicated with the d end, and the b end of the four-way valve is communicated with the c end; the compressor is electrified to work, high-temperature and high-pressure refrigerant steam enters from the end a and the end d of the four-way valve and then enters from the end k and the end j of the multi-connected indoor unit and exchanges heat with indoor air in a refrigerant channel in the multi-connected indoor unit, the high-temperature and high-pressure liquid refrigerant is condensed into a medium-temperature and medium-pressure liquid refrigerant after exchanging heat, the liquid refrigerant enters the liquid storage tank through the third one-way valve, and the medium-temperature and medium-pressure liquid refrigerant is continuously divided into two paths after passing through the drying filter: the first path enters from the h end and exits from the g end of the economizer, and the second path enters from the e end and exits from the f end of the economizer after being throttled and depressurized by a second expansion valve; two paths of refrigerants exchange heat in the economizer; the medium-temperature and medium-pressure liquid refrigerant in the first path is further condensed and cooled in the economizer, and then is throttled and decompressed by a first expansion valve to form a low-temperature and low-pressure liquid refrigerant; the low-temperature low-pressure liquid refrigerant enters the evaporative cooling heat exchanger through the fourth check valve and the first refrigerant liquid main pipe, after the low-temperature low-pressure liquid refrigerant exchanges heat with the industrial waste heat wastewater in the cooling inner pipe and on the surface of the heat exchanger, the liquid refrigerant is heated and vaporized into refrigerant steam, then the refrigerant steam passes through the first refrigerant steam main pipe and the first electromagnetic valve, enters the air inlet of the compressor through the end b and exits through the end c of the four-way valve, passes through the gas-liquid separator and then enters the air return port of the compressor for compression, and the main circulation process of the refrigerant is completed; the medium-temperature and medium-pressure liquid refrigerant of the second path is throttled and depressurized by a second expansion valve and then is further heated and vaporized in an economizer to form medium-temperature and low-pressure steam; the medium-temperature low-pressure steam returns to an enthalpy increasing port of the compressor after passing through a third electromagnetic valve, and an auxiliary enthalpy increasing cycle is completed.
In the mode, the fan is closed, and the water pump starts the compressor preferentially; the industrial waste heat wastewater firstly enters the cooling inner pipe through the cooling main pipe, enters the cooling auxiliary pipe after first heat exchange with refrigerant liquid, then enters the cooling outer pipe, is uniformly distributed on the surface of each heat exchange plate, and carries out second heat exchange with liquid refrigerant; liquid refrigerant is subjected to heat exchange twice, is vaporized and heated, releases heat to cool, and is discharged through a blow-off pipe through a blow-off electromagnetic valve, so that the water source type heating function is realized.
Example two
As shown in fig. 8, the difference between the cascade evaporation heat pump module set of the present embodiment and the first embodiment is that: the connection mode of the cooling outer pipe 203, the water distribution groove 201 and the water distribution microporous plate 202 between two adjacent heat exchange units is as follows: a water distribution tank 201 is arranged above the cooling outer pipe 203, water distribution micro-porous plates 202 are arranged on two sides of the water distribution tank 201, the lower ends of the water distribution micro-porous plates 202 are connected with the pipe wall of the cooling outer pipe 203, and the upper ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section 205 of the lowest condensing pipe of the heat exchange unit positioned on the upper side; the bottom of the cooling outer pipe 203 is connected with the top of the uppermost horizontal section 205 of the condensing pipe in the heat exchange unit; a plurality of the brackets 206 are arranged at intervals between the top of the cooling outer tube 203 and the bottom of the lowest horizontal section 205 of the condensing tube of the heat exchange unit located at the upper side.
EXAMPLE III
As shown in fig. 9, the difference between the cascade evaporation heat pump module set of the present embodiment and the first embodiment is that: a water distribution tank 201 is arranged between the lowest condenser pipe horizontal section 205 of the upper heat exchange unit and the highest condenser pipe horizontal section 205 of the lower heat exchange unit, water distribution micro-porous plates 202 are arranged on two sides of the water distribution tank 201, the lower ends of the water distribution micro-porous plates 202 are connected with the pipe walls of the highest condenser pipe horizontal section 205 of the lower heat exchange unit, and the upper ends of the water distribution micro-porous plates are connected with the pipe walls of the lowest condenser pipe horizontal section 205 of the upper heat exchange unit; the cooling outer tube 203 is inserted into the water distribution tank 201. The bottom of the cooling outer pipe 203 is connected with the top of the uppermost horizontal section 205 of the condenser pipe of the heat exchange unit to which the cooling outer pipe belongs, and a distance is reserved between the bottom of the cooling outer pipe and the lowermost horizontal section 205 of the heat exchange unit positioned on the upper side; a plurality of the brackets 206 are arranged at intervals between the top of the cooling outer tube 203 and the bottom of the lowest horizontal section 205 of the condensing tube of the heat exchange unit located at the upper side.
Example four
As shown in fig. 10, the difference between the cascade evaporation heat pump module set of the present embodiment and the third embodiment is that: the top of the cooling outer pipe 203 is connected with the bottom of the condenser pipe horizontal section 205 at the lowest side of the heat exchange unit at the upper side, and a distance is reserved between the top of the cooling outer pipe and the condenser pipe horizontal section 205 at the highest side of the heat exchange unit; the plurality of brackets 206 are disposed at intervals between the bottom of the cooling outer tube 203 and the top of the uppermost horizontal section 205 of the condenser tube of the heat exchange unit to which the cooling outer tube 203 belongs.
EXAMPLE five
As shown in fig. 11 and 12, the present embodiment is different from the first embodiment in that: the unit does not comprise a multi-connected indoor unit 12, and is connected with an indoor heat exchanger (water machine); the indoor heat exchanger comprises an outdoor heat exchanging part 13 and an indoor heat exchanging part; the outdoor heat exchange part 13 is communicated with the indoor heat exchange part through a cold-carrying agent (cooling water) channel; the outdoor heat exchanging portion 13 further includes a refrigerant heat exchanging channel that exchanges heat with a secondary refrigerant (cooling water) channel; the refrigerant heat exchange channel is provided with an m end and an n end, and the m end and the n end are respectively connected with the refrigerant operation assembly 6 instead of the j end and the k end of the multi-connected indoor unit 12; the outdoor heat exchanging part 13 is disposed in an equipment room in the unit.
In the cascade evaporation cold-hot pump module unit of this embodiment, during heat exchange, a refrigerant in the refrigerant operation assembly enters the refrigerant heat exchange channel of the outdoor heat exchange portion to exchange heat with a secondary refrigerant (cooling water) in the secondary refrigerant channel thereof, and the secondary refrigerant (cooling water) is conveyed to the indoor heat exchange portion to exchange heat with indoor air.
The above embodiments should not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent transformations fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a cascade evaporation heat and cold pump module unit which characterized in that: comprises an evaporative cooling heat exchanger, an air cooling heat exchanger and a refrigerant running assembly; the evaporative cooling heat exchanger and the air cooling heat exchanger are connected in parallel and then are connected with the refrigerant operation assembly; the refrigerant operation assembly is used for operating a refrigerant to exchange heat in an evaporative cooling heat exchanger or an air cooling heat exchanger;
the evaporative cooling heat exchanger comprises a plurality of heat exchange plates which are arranged at intervals along the direction vertical to the evaporative heat exchange surface; each heat exchange plate comprises at least one heat exchange unit; the heat exchange unit is of a plate-shaped structure formed by vertically arranging a plurality of horizontal sections of the condensation pipes, two ends of the horizontal sections of the condensation pipes are connected through bent sections of the condensation pipes to form at least one refrigerant heat exchange channel, and two surfaces of the plate-shaped structure form evaporation heat exchange surfaces; the horizontal sections of two adjacent condensing tubes in the horizontal sections of the plurality of condensing tubes vertically arranged in the plate-shaped structure are connected without gaps, so that the evaporation heat exchange surface has continuity and is in a concave-convex shape; a bracket is arranged between the cooling outer pipe and the horizontal section of the condensing pipe in the water distribution tank; a cooling outer pipe is arranged above the horizontal section of the uppermost condensing pipe; a water distribution groove is also arranged between the cooling outer pipe and the horizontal section of the uppermost condensing pipe; both sides of the water distribution tank are provided with water distribution microporous plates; the upper end of the water distribution microporous plate is connected with the pipe wall of the cooling outer pipe, and the lower end of the water distribution microporous plate is connected with the pipe wall of the horizontal section of the uppermost condensing pipe, so that the water distribution tank is fixed between the cooling outer pipe and the heat exchange unit in an embedded manner to form an integral structure; the cooling outer pipe is provided with a plurality of water outlet holes which are communicated with the water distribution tank and used for uniformly injecting water into the water distribution tank; the water distribution groove is used for uniformly distributing water injected by the cooling outer pipe on the evaporation heat exchange plate surface through the water distribution microporous plate to form a water curtain to exchange heat with the refrigerant at the outer side of the refrigerant heat exchange channel; and a cooling inner pipe is arranged in the refrigerant heat exchange channel in a penetrating manner and is used for exchanging heat with the refrigerant at the inner side of the refrigerant heat exchange channel through water passing through the cooling inner pipe.
2. The modular unit of claim 1, wherein: the heat exchange plate comprises a plurality of heat exchange units; the heat exchange units are vertically arranged, and two adjacent heat exchange units are connected through bent sections of the condenser pipe, so that respective refrigerant heat exchange channels are correspondingly communicated; the top of the cooling outer pipe in the heat exchange unit positioned at the lower side in the two adjacent heat exchange units is connected with the bottom of the horizontal section of the condensation pipe positioned at the lowest side of the heat exchange unit positioned at the upper side; and the plurality of brackets are arranged between the bottom of the cooling outer pipe and the top of the uppermost horizontal section of the condensing pipe of the heat exchange unit at intervals.
3. The modular unit of claim 2, wherein: the connection mode of the cooling outer pipe, the water distribution groove and the water distribution microporous plate between two adjacent heat exchange units is replaced by: a water distribution groove is arranged above the cooling outer pipe, water distribution micro-porous plates are arranged on two sides of the water distribution groove, the lower ends of the water distribution micro-porous plates are connected with the pipe wall of the cooling outer pipe, and the upper ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section of the bottommost condensing pipe of the heat exchange unit positioned on the upper side; the bottom of the cooling outer pipe is connected with the top of the horizontal section of the uppermost condensing pipe in the heat exchange unit; the plurality of brackets are arranged between the top of the cooling outer pipe and the bottom of the horizontal section of the lowest condensing pipe of the heat exchange unit on the upper side at intervals; or replacing with: a water distribution groove is arranged between the horizontal section of the lowest condenser pipe of the heat exchange unit at the upper side and the horizontal section of the highest condenser pipe of the heat exchange unit at the lower side, water distribution micro-porous plates are arranged at two sides of the water distribution groove, the lower ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section of the highest condenser pipe of the heat exchange unit at the lower side, and the upper ends of the water distribution micro-porous plates are connected with the pipe wall of the horizontal section of the lowest condenser pipe of the heat exchange unit at the upper; the cooling outer pipe penetrates through the water distribution tank.
4. A cascade evaporative heat pump module assembly as set forth in claim 3, wherein: the top of the cooling outer pipe is connected with the bottom of the horizontal section of the lowest condensing pipe of the heat exchange unit positioned on the upper side, and a distance is reserved between the top of the horizontal section of the uppermost condensing pipe of the heat exchange unit and the bottom of the cooling outer pipe; or, the bottom of the cooling outer pipe is connected with the top of the uppermost horizontal section of the condenser pipe of the heat exchange unit to which the cooling outer pipe belongs, and a distance is reserved between the bottom of the lowermost horizontal section of the condenser pipe of the heat exchange unit positioned on the upper side and the top of the cooling outer pipe, and the plurality of brackets are arranged between the bottom of the lowermost horizontal section of the condenser pipe of the heat exchange unit positioned on the upper side and the top of the cooling outer pipe at intervals.
5. The modular unit of claim 4, wherein: in two adjacent heat exchange units, the number of the horizontal sections of the condensing tubes in the heat exchange unit at the lower side is smaller than that of the horizontal sections of the condensing tubes in the heat exchange unit at the upper side, so that the heat exchange areas of the evaporation heat exchange surfaces of the heat exchange units are gradually reduced from top to bottom; the number of the water outlet holes of the cooling outer pipe in the heat exchange unit on the lower side is smaller than that of the water outlet holes of the cooling outer pipe on the upper side, and the water distribution requirement of the evaporation heat exchange surface corresponding to the heat exchange area is met.
6. The modular unit of claim 1, wherein: the top end of the refrigerant heat exchange channel of the heat exchange plate is provided with a refrigerant steam inlet, and the bottom end of the refrigerant heat exchange channel is provided with a refrigerant liquid outlet; one end of the cooling outer pipe of the heat exchange plate is provided with an outer cooling water inlet; two ends of the cooling inner pipe respectively penetrate out of the refrigerant heat exchange channel, the bottom end of the cooling inner pipe is provided with an inner cooling water inlet, and the top end of the cooling inner pipe is provided with an inner cooling water outlet; the cooling water inlet of the cooling outer pipe of the heat exchange plates is connected with an external cooling water inlet shunt pipe; the external cooling water inlet flow dividing pipe is also connected with a cooling auxiliary pipe; the inner cooling water inlets of the plurality of cooling inner pipes are connected with a cooling main pipe, and the inner cooling water outlets are connected with an inner cooling water outlet header; the internal cooling effluent collecting pipe is communicated with the cooling secondary pipe; the air-cooled heat exchanger is connected with a second refrigerant steam main pipe and a second refrigerant liquid main pipe; the first refrigerant steam main pipe and the second refrigerant steam main pipe are connected in parallel and then connected with the refrigerant operation assembly, and the first refrigerant liquid main pipe and the second refrigerant liquid main pipe are connected in parallel and then connected with the refrigerant operation assembly; the first refrigerant steam main pipe is provided with a first electromagnetic valve, and the second refrigerant steam main pipe is provided with a second electromagnetic valve.
7. The modular unit of claim 6, wherein: the unit also comprises a water tank; a water pump is arranged in the water tank; the water outlet end of the water pump is communicated with the cooling main pipe and is used for sending cooling water in the water tank into the cooling inner pipe of the evaporative cooling heat exchanger through the cooling main pipe and sending the cooling water into the outer cooling pipe through the cooling auxiliary pipe; the water tank is also provided with a water replenishing port; the bottom of the water tank is also connected with a sewage discharge pipe; a sewage discharge electromagnetic valve is arranged on the sewage discharge pipe; and a cooling filler layer is also arranged between the evaporative cooling heat exchanger and the water tank and is used for cooling the unevaporated water dropping from the evaporative cooling heat exchanger and discharging the unevaporated water into the water tank.
8. The modular unit of claim 7, wherein: the refrigerant operation assembly comprises a compressor, a four-way valve, a first electromagnetic valve, a second electromagnetic valve, a first one-way valve, a liquid storage tank, a drying filter, an economizer, a first expansion valve, a second one-way valve, a gas-liquid separator, a third electromagnetic valve, a second expansion valve, a third one-way valve and a fourth one-way valve; the unit also comprises a multi-connected indoor unit; the compressor is provided with an air outlet, an air return port and an enthalpy increasing port; the four-way valve is provided with an a end, a b end, a c end and a d end; the economizer is provided with an e end, an f end, a g end and an h end, wherein the e end is communicated with the f end in the economizer, and the g end is communicated with the h end in the economizer; the multi-connected indoor unit is provided with a j end and a k end, and the j end and the k end are two ports of a refrigerant channel of the multi-connected indoor unit.
The air outlet of the compressor, the end a and the end b of the four-way valve, a pipeline formed by connecting the first refrigerant steam main pipe/the second refrigerant steam main pipe in parallel, a first refrigerant steam main pipe and a first electromagnetic valve of the evaporative cooling heat exchanger, a first refrigerant liquid main pipe, a first one-way valve, a liquid storage tank, a drying filter, an h end and a g end of an economizer, a first expansion valve, a second one-way valve, a j end and a k end of a multi-connected indoor unit, a d end and a c end of the four-way valve, a gas-liquid separator and a gas return port of the compressor are communicated to form a first refrigeration operation channel.
The air outlet of the compressor, the end a and the end b of the four-way valve, a pipeline formed by connecting the first refrigerant steam main pipe/the second refrigerant steam main pipe in parallel, a second refrigerant steam main pipe of the air-cooled heat exchanger, a second electromagnetic valve, a second refrigerant liquid main pipe, a first one-way valve, a liquid storage tank, a drying filter, the h end and the g end of the economizer, a first expansion valve, a second one-way valve, the j end and the k end of the multi-connected indoor unit, the d end and the c end of the four-way valve, a gas-liquid separator and the air return port of the compressor are sequentially communicated to form a second refrigeration operation channel.
The air outlet of the compressor, the a end and the d end of the four-way valve, the k end and the j end of the multi-connected indoor unit, the third one-way valve, the liquid storage tank, the drying filter, the h end and the g end of the economizer, the first expansion valve, the fourth one-way valve, a pipeline formed by connecting the first refrigerant liquid main pipe/the second refrigerant liquid main pipe in parallel, the first refrigerant liquid main pipe, the first refrigerant steam main pipe and the first electromagnetic valve of the evaporative cooling heat exchanger, the b end and the c end of the four-way valve, the gas-liquid separator and the air return port of the compressor are sequentially communicated to form a first heating operation channel.
The air outlet of the compressor, the a end and the d end of the four-way valve, the k end and the j end of the multi-connected indoor unit, the third one-way valve, the liquid storage tank, the drying filter, the h end and the g end of the economizer, the first expansion valve, the fourth one-way valve, a pipeline formed by connecting the first refrigerant liquid main pipe/the second refrigerant liquid main pipe in parallel, the second refrigerant liquid main pipe, the second refrigerant steam main pipe and the second electromagnetic valve of the air-cooling heat exchanger, the b end and the c end of the four-way valve, the gas-liquid separator and the air return port of the compressor are sequentially communicated to form a second heating operation channel.
In the first heating operation channel and the second heating operation channel, an outlet of the drying filter, the second expansion valve, an e end and an f end of the economizer, the third electromagnetic valve and an enthalpy-increasing port of the compressor are communicated in sequence to form an auxiliary enthalpy-increasing loop; and an internal channel between the e end and the f end in the economizer exchanges heat with an internal channel between the h end and the g end.
9. The modular unit of claim 8, wherein: the unit also comprises a shell, and a ventilation opening is formed in the top of the shell; a fan is arranged in the ventilation opening; the evaporative cooling heat exchanger and the cooling filler layer are sequentially arranged below the fan; the air-cooled heat exchanger is arranged on the outer side of the evaporative cooling heat exchanger; the water tank is arranged below the evaporative cooling heat exchanger and the air-cooling heat exchanger, and the side wall of the shell corresponding to the air-cooling heat exchanger is also provided with a ventilation grating; a water-stop sheet is also arranged between the fan and the evaporative cooling heat exchanger; an equipment chamber is also arranged below the water tank in the machine shell; the refrigerant operation assembly is installed in the equipment room, and the equipment room is also internally provided with an electric cabinet for controlling the fan, the water pump, the compressor, the four-way valve, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve.
10. A cascade evaporative heat pump module train as claimed in claim 8 or 9, wherein: the unit does not comprise a multi-connected indoor unit, and is connected with the indoor heat exchanger; the indoor heat exchanger comprises an outdoor heat exchanging part and an indoor heat exchanging part; the outdoor heat exchange part is communicated with the indoor heat exchange part through a cold-carrying agent channel; the outdoor heat exchange part also comprises a refrigerant heat exchange channel for exchanging heat with the secondary refrigerant channel; the refrigerant heat exchange channel is provided with an m end and an n end, and the m end and the n end are respectively connected with the refrigerant operation assembly instead of the j end and the k end of the multi-connected indoor unit; the outdoor heat exchanging part is arranged in an equipment room in the unit.
CN202010401525.1A 2020-05-13 2020-05-13 Cascade evaporation cold and hot pump module unit Pending CN111473666A (en)

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CN114963599A (en) * 2022-05-27 2022-08-30 合肥荣事达太阳能有限公司 Cascade air source heat pump
CN114963599B (en) * 2022-05-27 2023-08-01 合肥荣事达太阳能有限公司 Overlapping type air source heat pump

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