CN114018073A - Air cooler and transcritical heat pump system with same - Google Patents
Air cooler and transcritical heat pump system with same Download PDFInfo
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- CN114018073A CN114018073A CN202111321585.3A CN202111321585A CN114018073A CN 114018073 A CN114018073 A CN 114018073A CN 202111321585 A CN202111321585 A CN 202111321585A CN 114018073 A CN114018073 A CN 114018073A
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- air cooler
- heat exchange
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- refrigerant
- heat pump
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Images
Classifications
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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
- F28D7/02—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 helically coiled
- F28D7/022—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 helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
Abstract
The invention discloses an air cooler and a transcritical heat pump system with the same, comprising: the air cooler comprises an air cooler body, wherein a liquid inlet pipe and a liquid outlet pipe are arranged on an air cooler shell, and a first cold fluid flow path for the flowing heat exchange of a first cold fluid is formed by the liquid inlet pipe, the inner space of the air cooler body and the liquid outlet pipe; the refrigerant pipe is arranged in the air cooler body, surrounds the axis of the air cooler body and forms a refrigerant loop for the flow heat exchange of the working medium of the transcritical heat pump; at least one heat exchange pipe which is arranged in the air cooler body and surrounds the axis of the air cooler body, and a second cold fluid flow path for flowing heat exchange of a second cold fluid is formed in the heat exchange pipe; the first and second cold fluids are of different types, and the types of the second cold fluids in the plurality of heat exchange tubes may be the same or different. Thus, it is not necessary to provide a plurality of air coolers in the transcritical heat pump system or to heat a plurality of cold fluids by using a plurality of transcritical heat pump systems.
Description
Technical Field
The invention relates to the technical field of air coolers, in particular to an air cooler and a transcritical heat pump system with the same.
Background
Under the requirement of a low-carbon society, the heat pump refrigeration technology has the advantages of high energy efficiency, no pollutant discharge, environmental friendliness, intellectualization and the like, and is more and more widely applied to various fields. CFC (chlorofluorocarbon), HCFC (hydrochlorofluorocarbon) and HFC (fluorocarbon) refrigerants are commonly used in the system, and the fluorocarbon refrigerants have higher Global Warming Potential (GWP) and can cause strong greenhouse effect, so that a transcritical heat pump system using natural working media such as CO2 and the like as refrigerants is produced.
The transcritical heat pump system performs transcritical circulation in the operation process, the transcritical heat pump working medium (such as natural working medium refrigerant, CO2) in the air cooler is in a supercritical state (the pressure and the temperature of the substance exceed the critical pressure (Pc) and the critical temperature (Tc) of the substance at the same time), the temperature slip characteristic without phase change in the heat exchange process can be well matched with the temperature rise process of the heated cold fluid, and the heated cold fluid can be directly heated to more than 80 ℃ from low temperature so as to meet the requirements of different industries. Meanwhile, under the operation condition of low ambient temperature in cold regions, the transcritical heat pump system adopting the transcritical heat pump working medium still has good system performance.
In the related art, in the actual operation process of the transcritical heat pump system, the pressure of the working medium of the transcritical heat pump is high, and an air cooler capable of bearing high pressure is required to be adopted, when a plurality of strands of cold fluids need to be heated, a plurality of air coolers are generally arranged in the transcritical heat pump system, or one air cooler is arranged in each transcritical heat pump system, and when a plurality of strands of cold fluids are heated, a plurality of transcritical heat pump systems are correspondingly adopted, so that the cost of the transcritical heat pump system is high, and in the embodiment in which a plurality of air coolers are arranged, the phenomenon of uneven heat exchange also exists.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide an air cooler that can achieve heating of multiple strands of cold fluid to reduce costs.
The invention further provides a trans-critical heat pump system adopting the air cooler.
According to an embodiment of the first aspect of the invention, the air cooler of the transcritical heat pump system comprises: the air cooler comprises an air cooler body, wherein a liquid inlet pipe and a liquid outlet pipe are arranged on an air cooler shell, and the liquid inlet pipe, the inner space of the air cooler body and the liquid outlet pipe form a first cold fluid flow path for the flowing heat exchange of a first cold fluid; the refrigerant pipe is arranged in the air cooler body, surrounds the axis of the air cooler body and is formed into a refrigerant loop for flow heat exchange of the transcritical heat pump working medium; at least one heat exchange tube disposed within and around an axis of the air cooler body, the heat exchange tube being formed therein as a second cold fluid flow path for heat exchange of a second cold fluid flow; the first and second cold fluids are different in kind, and the kind of the second cold fluid in the plurality of heat exchange tubes may be the same or different.
According to the air cooler provided by the embodiment of the invention, the plurality of heat exchange tubes are arranged in the air cooler body, so that the heating efficiency is improved or more types of cold fluid heating are carried out on the premise of realizing at least two different types of cold fluid heating based on the use requirement, a plurality of air coolers are not required to be arranged in a transcritical heat pump system or a plurality of transcritical heat pump systems are not required to be adopted to respectively heat a plurality of cold fluids, the cost is reduced, and the heating efficiency and the heating uniformity are ensured.
According to some embodiments of the present invention, the refrigerant inlet of the refrigerant pipe is disposed at one axial end of the air cooler body, and the refrigerant outlet of the refrigerant pipe is disposed at the other axial end of the air cooler body.
In some embodiments, the liquid inlet pipe and the liquid outlet pipe are arranged in the circumferential direction of the air cooler body, the liquid inlet pipe is arranged adjacent to the refrigerant outlet, and the liquid outlet pipe is arranged adjacent to the refrigerant inlet.
Furthermore, the liquid inlet pipe and the liquid outlet pipe are communicated with the air cooler body at one ends, the other ends of the liquid inlet pipe and the liquid outlet pipe deviate from each other to extend, and the liquid inlet pipe is parallel to the extending direction of the liquid outlet pipe.
In some embodiments, further comprising: and the heat exchange tubes extend out of the air cooler body and are provided with a first liquid inlet and a first liquid outlet at two ends respectively, and correspond to one first connecting tube and one second connecting tube.
Further, one end of each of the first connecting pipe and the second connecting pipe extends into the air cooler body to communicate with the corresponding heat exchange pipe, the other end extends away from each other, and the extending directions of the first connecting pipe and the second connecting pipe are parallel.
In some embodiments, the heat exchange tubes are plural, the winding radius of the plural heat exchange tubes is the same, and the plural heat exchange tubes are staggered at equal intervals in the axial direction of the air cooler body.
In some embodiments, the heat exchange tube has a spiral direction opposite to or the same as that of the refrigerant tube, and the heat exchange tube and the refrigerant tube are spaced apart in a radial direction of the air cooler body.
Further, gaps are reserved among the heat exchange tubes, the refrigerant tubes and the plurality of heat exchange tubes.
According to a second aspect of the invention, a transcritical heat pump system is provided, comprising: the air cooler described in the above embodiments.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an air cooler according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a transcritical heat pump system according to an embodiment of the present invention.
Reference numerals:
a transcritical heat pump system 1000 is provided,
the air cooler 100, the compressor 200, the evaporator 300, the throttle valve 400, the fan 500,
a gas cooler body 10, a liquid inlet pipe 11, a liquid outlet pipe 12,
a refrigerant pipe 20, a refrigerant inlet 21, a refrigerant outlet 22,
a heat exchange pipe 30, a first connection pipe 40, and a second connection pipe 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An air cooler 100 and a transcritical heat pump system 1000 according to an embodiment of the present invention are described below with reference to fig. 1-2.
As shown in fig. 1, the air cooler 100 of the transcritical heat pump system 1000 according to the embodiment of the present invention includes: an air cooler body 10, a refrigerant pipe 20, and at least one heat exchange pipe 30.
The air cooler body 10 is provided with a liquid inlet pipe 11 and a liquid outlet pipe 12, the pipe inner space of the liquid inlet pipe 11, the inner space of the air cooler body 10 and the pipe inner space of the liquid outlet pipe 12 form a first cold fluid flow path for the flowing heat exchange of a first cold fluid, and the first cold fluid can flow in the first cold fluid flow path; the refrigerant pipe 20 is arranged in the air cooler body 10, the refrigerant pipe 20 is arranged around the axis of the air cooler body 10 and forms a refrigerant loop for the flow heat exchange of the transcritical heat pump working medium; the heat exchange pipe 30 is disposed inside the air cooler body 10 and around the axis of the air cooler body 10, and a second cold fluid flow path for flowing heat exchange of a second cold fluid is formed inside the heat exchange pipe 30, and the second cold fluid can flow inside the second cold fluid flow path.
Specifically, the air cooler body 10 has a receiving space in which a refrigerant pipe 20 and at least one heat exchange pipe 30 are disposed, a liquid inlet pipe 11 and a liquid outlet pipe 12 are disposed in a circumferential direction of the air cooler body 10, a shell side of the air cooler body 10 is formed as a first cold fluid flow path, the heat exchange pipe 30 is formed therein as a second cold fluid circuit, and the refrigerant pipe 20 is internally formed as a refrigerant circuit to pass a transcritical heat pump working medium (which may be a natural heat pump working medium)However, working fluid refrigerants, such as: CO22) The first cold fluid in the first cold fluid flow path, which needs to be heated, is heated, and the first cold fluid heats the second cold fluid in the second cold fluid loop, which needs to be heated.
It should be noted that the at least one heat exchange pipe 30 refers to: one, two or more heat exchange tubes 30; the natural working medium refrigerant referred to in the specification means a refrigerant made of natural substances commonly existing in nature, for example: CO22(ii) a The shell-side formation of the air cooler body 10 as the first cold fluid flow path means: the gaps between the inner circumference of the shell and the tube bundle and the baffles are the inner spaces of the intercooler body 10 except for the refrigerant tubes 20 and the heat exchange tubes 30.
It can be understood that the first cold fluid and the second cold fluid are different in kind, and the kinds of the second cold fluids in the plurality of heat exchange tubes may be the same or different, that is, in an embodiment where the heat exchange tubes 30 are two or more, the kinds of the second cold fluids in the plurality of heat exchange tubes 30 may be the same or different, when the kinds of the second cold fluids in the plurality of heat exchange tubes 30 are different, a plurality of cold fluids to be heated may be heated simultaneously by the air cooler 100 of the present invention, when the kinds of the second cold fluids in the plurality of heat exchange tubes 30 are the same, the heating efficiency of the air cooler 100 of the present invention may be improved, more cold fluids of the same kind may be heated in a unit time, and in this case, heating of at least two cold fluids may also be performed.
In summary, according to the air cooler 100 of the embodiment of the present invention, the plurality of heat exchange pipes 30 are disposed in the air cooler body 10, so that the heating efficiency can be improved or more types of cold fluids can be heated on the premise of implementing at least two different types of cold fluids according to the usage requirement, and thus it is not necessary to dispose a plurality of air coolers 100 in the transcritical heat pump system 1000 or adopt a plurality of transcritical heat pump systems 1000 to respectively heat a plurality of types of cold fluids, thereby reducing the cost and ensuring the heating efficiency and the heating uniformity.
For example, in some embodiments, the first cold fluid corresponds to one cold fluid, and the second cold fluid flowing in the plurality of heat exchange tubes 30 corresponds to one cold fluid, so that heating of two cold fluids can be performed, and the heating efficiency of the second cold fluid can be improved; in other embodiments, the first cold fluid corresponds to one kind of cold fluid, the second cold fluids flowing in the heat exchange tubes 30 are different in kind and correspond to a plurality of kinds of cold fluids (for example, 4 kinds of cold fluids flow in 4 heat exchange tubes 30 in total, and five kinds of cold fluids can be simultaneously heated in correspondence, or 4 heat exchange tubes 30 in total, 1 heat exchange tube and 2 heat exchange tube flow the same cold fluid, 3 heat exchange tubes and 4 heat exchange tubes flow different cold fluids in correspondence, and 4 kinds of cold fluids can be simultaneously heated in correspondence), and the second cold fluid is a general name of a plurality of kinds of cold fluids flowing in the heat exchange tubes 30 and needing to be heated by the heat exchange tubes 30.
In an exemplary embodiment of the present application, the cold fluid to be heated comprises: cold fluid 1-cold fluid n, heat exchange tube 30 includes: the heat exchanger comprises a first heat exchange tube, a second heat exchange tube, a third heat exchange tube, a fourth heat exchange tube, a fifth heat exchange tube and a sixth heat exchange tube, wherein a cold fluid 1 is used as a first cold fluid, a cold fluid 2-cold fluid n is used as a second cold fluid, the cold fluid 1 is positioned in a first cold fluid flow path and exchanges heat with a transcritical heat pump working medium in a refrigerant loop, the cold fluid 2 is arranged in the first heat exchange tube, the cold fluid 3 is arranged in the second heat exchange tube, the corresponding cold fluid n is arranged in the nth-1 heat exchange tube, the cold fluid 2-cold fluid n is heated through the cold fluid 1, the first cold fluid is heated by one air cooler 100, and the first cold fluid heats multiple second cold fluids.
In addition, it should be noted that the flow locus of the first cold fluid is the shell side of the air cooler body 10, the second cold fluid flows in the heat exchange tube 30, the pressure of the transcritical heat pump working medium is high, the heat exchange tube 30 is located in the air cooler body 10, so that the second cold fluid to be heated can be high-pressure fluid, the application range of the air cooler 100 of the present invention can be also increased, the universality is improved, and the heat exchange tube 30 is arranged by winding the axis of the air cooler body 10, so that the heating uniformity can be improved.
As shown in fig. 1, according to some embodiments of the present invention, a refrigerant inlet 21 of a refrigerant pipe 20 is disposed at one axial end of the air cooler body 10, and a refrigerant outlet 22 of the refrigerant pipe 20 is disposed at the other axial end of the air cooler body 10.
The refrigerant pipe 20 is disposed around the axis of the air cooler body 10, and the refrigerant inlet 21 and the refrigerant outlet 22 of the refrigerant pipe 20 are located at two axial ends of the air cooler body 10, so that the winding length of the refrigerant pipe 20 is longer, and the winding area is larger, thereby increasing the heat exchange area between the refrigerant pipe 20 and the first cold fluid, increasing the heating efficiency of the first cold fluid and the second cold fluid, and increasing the heating effect of the air cooler 100.
In some embodiments, the liquid inlet pipe 11 and the liquid outlet pipe 12 are disposed in the circumferential direction of the air cooler body 10, and the liquid inlet pipe 11 is disposed adjacent to the refrigerant outlet 22 and the liquid outlet pipe 12 is disposed adjacent to the refrigerant inlet 21; the heat exchange pipe 30 has a first liquid inlet and a first liquid outlet at both ends thereof, and the air cooler 100 further includes: a plurality of first connection pipes 40 and a plurality of second connection pipes 50 extending out of the air cooler body 10, each of the heat exchange pipes 30 having a first liquid inlet and a first liquid outlet at both ends thereof, one first connection pipe 40 and one second connection pipe 50 corresponding to each of the heat exchange pipes 30, and the first connection pipe 40 being disposed adjacent to the refrigerant outlet 22 and the second connection pipe 50 being disposed adjacent to the refrigerant inlet 21.
Therefore, the flow direction of the first cold fluid and the flow direction of the second cold fluid are opposite to the flow direction of the transcritical heat pump working medium, the heat exchange effect of the transcritical heat pump working medium and the first cold fluid and the heat exchange effect of the first cold fluid and the second cold fluid can be enhanced, the technical purpose of enhancing heat exchange is achieved, the transcritical heat pump working medium exchanges heat with the first cold fluid, the first cold fluid exchanges heat with the second cold fluid, a temperature gradient exists, and the liquid outlet temperature of the first liquid outlet can be lower than the liquid outlet temperature of the liquid outlet pipe 12.
Furthermore, the heat exchange characteristic of the transcritical heat pump working medium in the critical region is similar to sensible heat exchange, the change of the inlet temperature of the heated cold fluid has a large influence on the outlet temperature of the refrigerant at the refrigerant outlet 22, and the higher the temperature difference between the inlet temperature and the outlet temperature of the heated cold fluid is, the higher the performance attenuation of the transcritical heat pump system 1000 is, so that direct heat exchange is adopted, and the outlet temperature of the refrigerant outlet 22 is controlled to be lower than the outlet temperature of the liquid outlet pipe 12, so as to reduce the performance attenuation of the transcritical heat pump system 1000.
As shown in fig. 1, one end of each of the liquid inlet pipe 11 and the liquid outlet pipe 12 is communicated with the air cooler body 10, the other ends extend away from each other, and the extending directions of the liquid inlet pipe 11 and the liquid outlet pipe 12 are parallel; the first and second connection pipes 40 and 50 have one ends extended into the air cooler body 10 to communicate with the corresponding heat exchange tubes 30 and the other ends extended away from each other, and the first and second connection pipes 40 and 50 are extended in parallel.
Like this, first connecting pipe 40, second connecting pipe 50 interval just are 180 setting, feed liquor pipe 11 and drain pipe 12 interval just are 180 setting, can improve the assembly convenience, avoid among the assembling process, the pipeline arranges and appears interfering.
Of course, the angle formed by the extending directions of the first connecting pipe 40 and the second connecting pipe 50 is not limited to this, and can be adjusted according to the use requirement.
It can be understood that the first connection pipe 40 and the second connection pipe 50 corresponding to each of the plurality of heat exchange pipes 30 are also arranged in a staggered manner in the circumferential direction of the air cooler body 10, so as to avoid the problem of interference during the assembly process, improve the assembly efficiency, and improve the working stability of the air cooler 100.
In some embodiments, the heat exchange tubes 30 are multiple, the winding radii of the heat exchange tubes 30 are the same, and the heat exchange tubes 30 are arranged in an axially staggered manner at equal intervals, so that the second cold fluid in the heat exchange tubes 30 is uniformly heated, the heating efficiency of the heat exchange tubes 30 is ensured to be consistent, and the soaking effect is improved.
Further, the rotation direction of the heat exchange tube 30 is opposite to that of the refrigerant tube 20, and the heat exchange tube 30 and the refrigerant tube 20 are arranged at intervals in the radial direction of the air cooler body 10, so that the high-temperature high-pressure transcritical heat pump working medium in the refrigerant tube 20 can heat the first cold fluid, the first cold fluid heats the second cold fluid in the heat exchange tube 30, the heat exchange tube 30 is spaced from the refrigerant tube 20 in the radial direction, the temperature gradient of the first cold fluid flow path and the second cold fluid flow path can be ensured, and the heat exchange effect and the heat exchange efficiency are improved.
It should be noted that gaps are formed between the heat exchange tubes 30 and the refrigerant tubes 20, and between the heat exchange tubes 30 and the refrigerant tubes 20, the size of the gap in the radial direction is adjusted according to the viscosity of the fluid of the first cold fluid and the second cold fluid, and the higher the viscosity, the larger the gap, the lower the viscosity, and the smaller the gap, and the plurality of heat exchange tubes 30 may be arranged at equal intervals in the axial direction.
Of course, the heat exchange tube 30 of the present invention may have the same direction of rotation as the refrigerant tube 20, and the heat exchange efficiency may be improved by providing the heat exchange tube 30 and the refrigerant tube 20 at intervals in the radial direction of the air cooler body 10.
As shown in fig. 2, a transcritical heat pump system 1000 according to an embodiment of the present invention includes: the air cooler 100 in the above embodiment.
Specifically, the transcritical heat pump system 1000 of the present embodiment of the invention includes: the air-cooled apparatus 100 includes an air-cooled apparatus 100, a compressor 200, an evaporator 300, a throttle valve 400, and a fan 500, the air-cooled apparatus 100, the compressor 200, the throttle valve 400, and the evaporator 300 are communicated to form a refrigerant circuit, the fan 500 is disposed opposite to the evaporator 300, and the air-cooled apparatus 100 is connected to the refrigerant circuit through a refrigerant inlet 21 and a refrigerant outlet 22.
In the specific working process, the low-temperature low-pressure transcritical heat pump working medium fluid is compressed into a high-temperature high-pressure fluid in a supercritical state after being compressed by the compressor 200 to work, and the high-temperature fluid enters the air cooler 100 through the refrigerant inlet 21 and flows out of the air cooler 100 through the refrigerant outlet 22.
In the process that the first cold fluid enters from the liquid inlet pipe 11 and flows out from the liquid outlet pipe 12, the second cold fluid enters from the first connecting pipe 40 and flows out from the second connecting pipe 50, the first cold fluid exchanges heat with the high-temperature fluid, and the heated first cold fluid heats the second cold fluid before flowing out, so that the first cold fluid and the second cold fluid are synchronously heated.
The cooled "high-temperature fluid" flows out to be a high-pressure low-temperature fluid, is throttled by the throttle valve 400 to be a low-temperature low-pressure two-phase fluid (a mixture of a gas phase and a liquid phase), enters the evaporator 300 to exchange heat with air, is formed into a saturated low-temperature low-pressure fluid, flows to the compressor 200 to be compressed, and is circulated.
According to the transcritical heat pump system 1000 of the embodiment of the invention, compared with the existing technical scheme of arranging a plurality of air coolers 100, the arrangement of the plurality of air coolers 100 for respectively heating a plurality of cold fluids is not required, the heating uniformity is ensured, and the system cost is reduced.
Illustratively, the inlet and outlet temperatures of a known high temperature fluid are 110 ℃/40 ℃, and the temperature of a first cold fluid (kinematic viscosity 1500 mm)2Crude oil/s) inlet and outlet temperature is 30 ℃/85 ℃, and the flow rate is 110 tons/day; second Cold fluid (kinematic viscosity 300 mm)2Crude oil/s) inlet and outlet temperature 30 ℃/75 ℃ and flow rate 150 ton/day.
The heat exchange capacity required by the first cold fluid is 150kW, the heat exchange capacity required by the second cold fluid is 200kW, the air coolers 100 are respectively adopted, the heat exchange areas are respectively 61 square meters and 178 square meters, and the total market price is about 115 ten thousand yuan; the air cooler 100 of the invention only needs 1 air cooler 100, the market price is about 50 ten thousand yuan, and the system cost can be saved by 56%.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An air cooler for a transcritical heat pump system, comprising:
the air cooler comprises an air cooler body, wherein a liquid inlet pipe and a liquid outlet pipe are arranged on an air cooler shell, and the liquid inlet pipe, the inner space of the air cooler body and the liquid outlet pipe form a first cold fluid flow path for the flowing heat exchange of a first cold fluid;
the refrigerant pipe is arranged in the air cooler body, surrounds the axis of the air cooler body and is formed into a refrigerant loop for flow heat exchange of the transcritical heat pump working medium;
at least one heat exchange tube disposed within and around an axis of the air cooler body, the heat exchange tube being formed as a second cold fluid flow path for heat exchange of a second cold fluid flow; wherein
The first and second cold fluids are different in kind, and the kind of the second cold fluid in the plurality of heat exchange tubes may be the same or different.
2. The air cooler of the transcritical heat pump system as recited in claim 1, wherein the refrigerant inlet of the refrigerant pipe is disposed at one axial end of the air cooler body, and the refrigerant outlet of the refrigerant pipe is disposed at the other axial end of the air cooler body.
3. The air cooler of the transcritical heat pump system as recited in claim 2, wherein the liquid inlet pipe and the liquid outlet pipe are disposed at a circumference of the air cooler body, and the liquid inlet pipe is disposed adjacent to the refrigerant outlet and the liquid outlet pipe is disposed adjacent to the refrigerant inlet.
4. The air cooler of the trans-critical heat pump system as claimed in claim 3, wherein the liquid inlet pipe and the liquid outlet pipe are both connected to the air cooler body at one end and extend away from each other at the other end, and the liquid inlet pipe and the liquid outlet pipe extend in parallel.
5. The air cooler of the transcritical heat pump system as recited in claim 2, further comprising: and the heat exchange tubes extend out of the air cooler body and are provided with a first liquid inlet and a first liquid outlet at two ends respectively, and correspond to one first connecting tube and one second connecting tube.
6. The air cooler of the transcritical heat pump system according to claim 5, wherein each of the first connection pipe and the second connection pipe has one end protruding into the air cooler body to communicate with the corresponding heat exchange pipe and the other end extending away from each other, and the first connection pipe and the second connection pipe extend in parallel.
7. The air cooler of the transcritical heat pump system as recited in claim 6, wherein the heat exchanging pipes are plural, the winding radius of the plural heat exchanging pipes is the same, and the plural heat exchanging pipes are arranged in the axial direction of the air cooler body in an equally spaced and staggered manner.
8. The air cooler of the transcritical heat pump system as recited in claim 7, wherein the heat exchange pipe has a spiral direction identical to or opposite to that of the refrigerant pipe, and the heat exchange pipe and the refrigerant pipe are spaced apart in a radial direction of the air cooler body.
9. The air cooler of the transcritical heat pump system as recited in any one of claims 5 to 8, wherein the heat exchange tubes have a gap with the refrigerant tube, a plurality of the heat exchange tubes.
10. A transcritical heat pump system, comprising: the air cooler of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321585.3A CN114018073A (en) | 2021-11-09 | 2021-11-09 | Air cooler and transcritical heat pump system with same |
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