CN210179940U - Coaxial heat exchanger, evaporator, condenser and refrigerating system - Google Patents
Coaxial heat exchanger, evaporator, condenser and refrigerating system Download PDFInfo
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- CN210179940U CN210179940U CN201920820996.9U CN201920820996U CN210179940U CN 210179940 U CN210179940 U CN 210179940U CN 201920820996 U CN201920820996 U CN 201920820996U CN 210179940 U CN210179940 U CN 210179940U
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Abstract
The utility model provides a coaxial heat exchanger, evaporimeter, condenser, refrigerating system, wherein coaxial heat exchanger includes: the inner pipe and the outer pipe are sleeved outside the inner pipe, and a channel is arranged between the outer pipe and the inner pipe; the channel has at least one refrigerant inlet and at least two refrigerant outlets on the outer tube; the refrigerant outlets are spaced and communicated through a first connecting pipe and then led to a main refrigerant outlet; the refrigerant inlet is arranged between at least two refrigerant outlets which are arranged at intervals; the utility model discloses a coaxial heat exchanger, refrigerant in coaxial heat exchanger from the refrigerant import department reposition of redundant personnel back, have with secondary refrigerant following current and with secondary refrigerant two kinds of flow methods against the current, will have the refrigerant of different temperatures in the refrigerant total exit and join the back, make the refrigerant satisfy the requirement of complete heat transfer, and neutralize two outlet exhaust refrigerant temperature to improve with the not enough of secondary refrigerant following current superheat degree, need too much heat transfer area to make the overheated defect of refrigerant.
Description
Technical Field
The utility model relates to a refrigerating system's heat exchange technology field, concretely relates to coaxial heat exchanger, evaporimeter, condenser, refrigerating system.
Background
The coaxial heat exchanger is composed of an inner pipe and an outer pipe, cold and hot fluids flow in the inner pipe and an annular gap between the inner pipe and the outer pipe respectively to conduct heat transfer, and the coaxial heat exchanger has the advantages of pressure resistance, shock resistance, difficult deformation, difficult blockage, smooth oil return and the like, thereby being particularly suitable for a heat pump system.
For example, chinese patent document CN2611857Y discloses a coaxial heat exchanger, which includes an outer tube and an inner tube, wherein the inner tube is installed in the outer tube, a relatively wide channel is formed between the outer tube and the outer tube, so that a gap between the outer tube and the inner tube is uniformly divided, two ends of the channel are a refrigerant inlet and a refrigerant outlet, respectively, and two ends of the inner tube are a water outlet and a water inlet, respectively; when the coaxial heat exchanger works, the flowing directions of the working medium and the refrigerant are opposite to ensure that sufficient heat exchange can be carried out, and the coaxial heat exchanger has better application in a condenser.
However, in the evaporator of the refrigeration system, the refrigerant in the coaxial heat exchanger generally needs to keep flowing with the secondary refrigerant, because the refrigerant needs to evaporate the liquid in the coaxial heat exchanger, the gas generated in the liquid evaporation process can hinder the flow of the refrigerant to a certain extent, and the flow path is long, the flow resistance is large, thereby resulting in a low heat exchange coefficient of the refrigerant, the refrigerant is not overheated enough, therefore, a large heat exchange area is often needed to overheat the refrigerant, so as to meet the requirement, which will increase the manufacturing cost of the heat exchanger, and cause the waste of raw materials.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the coaxial heat exchanger among the prior art when being used for the evaporimeter, needs great heat transfer area with the overheated defect of refrigerant to a coaxial heat exchanger with the refrigerant overheated just can be satisfied to be provided one kind when being used for the evaporimeter, need not through increasing heat transfer area.
The utility model also provides an evaporimeter of being applied to above-mentioned coaxial heat exchanger.
The utility model also provides a condenser.
The utility model also provides a refrigerating system.
The utility model also provides a refrigerant heat transfer method.
In order to solve the technical problem, the utility model provides a coaxial heat exchanger, including inner tube and outer tube, the one end of inner tube has the coolant import, and the other end has the coolant export, the outer tube cover is established in the outside of inner tube, has the passageway between outer tube and inner tube;
the channel has at least one refrigerant inlet and at least two refrigerant outlets on the outer tube;
the refrigerant outlets are spaced and communicated through a first connecting pipe and then led to a main refrigerant outlet;
the refrigerant inlet is arranged between at least two spaced refrigerant outlets.
Preferably, the number of the refrigerant outlets is two, and the two refrigerant outlets include a first refrigerant outlet and a second refrigerant outlet, and the two refrigerant outlets are respectively arranged at two ends of the channel.
Preferably, the refrigerant inlet is provided with a plurality of refrigerant inlets which are arranged on the outer pipe at intervals.
Preferably, the first refrigerant outlet is respectively communicated with the second refrigerant outlet and the refrigerant main inlet through a flow dividing structure; and a third check valve communicated towards the direction of the refrigerant inlet is arranged before each refrigerant inlet.
As a preferred scheme, the shunting structure comprises:
one end of the second connecting pipe is connected with the first refrigerant outlet, and the other end of the second connecting pipe is respectively communicated with the second refrigerant outlet and the refrigerant main inlet through a first three-way valve;
the first check valve is arranged on the first connecting pipe, is positioned between the main refrigerant outlet and the first three-way valve and is communicated towards the main refrigerant outlet;
and the second one-way valve is connected between the first three-way valve and the refrigerant main inlet and is communicated towards the direction of the refrigerant main inlet.
As a preferable scheme, the flow dividing structure further includes:
and the second three-way valve is connected between the second one-way valve and the main refrigerant inlet, and the third end of the second three-way valve is connected with a third one-way valve in front of the refrigerant inlet.
An evaporator comprising the coaxial heat exchanger of any of the above aspects.
A condenser comprising the coaxial heat exchanger of any of the above aspects.
A refrigeration system comprising an evaporator as described in the preceding aspects and/or a condenser as described in the preceding aspects.
A refrigerant heat exchange method comprises the following steps:
introducing a refrigerant into a refrigerant inlet of the coaxial heat exchanger;
enabling part of the refrigerants to flow in the direction opposite to the direction of the secondary refrigerants and part of the refrigerants to flow in the same direction as the direction of the secondary refrigerants;
and the refrigerants are converged at the refrigerant main outlet and discharged out of the coaxial heat exchanger.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a coaxial heat exchanger, interval is equipped with two at least refrigerant exports on the outer tube, be provided with at least one refrigerant import between two at least refrigerant exports, after the refrigerant enters into coaxial heat exchanger from the refrigerant import, through reposition of redundant personnel respectively towards the refrigerant export on both sides flow, consequently the refrigerant after reposition of redundant personnel from the refrigerant import in coaxial heat exchanger has with secondary refrigerant cocurrent and with secondary refrigerant two kinds of flow mode against each other, through with secondary refrigerant countercurrent partial refrigerant have higher temperature when discharging from a refrigerant export, through with secondary refrigerant cocurrent partial refrigerant from another refrigerant export discharge have lower temperature, after will the above-mentioned refrigerant that has different temperatures join in total exit of refrigerant, make the refrigerant satisfy the requirement of complete heat transfer, and the refrigerant temperature of two exports discharge neutralizes, therefore, when the evaporator is used, the required superheat degree of the refrigerant does not need a large heat exchange area to overheat the refrigerant.
2. The utility model provides a coaxial heat exchanger, refrigerant export have two, and two refrigerant exports set up respectively at the both ends of passageway, and the refrigerant import is located between two refrigerant exports to can effectually utilize the heat transfer space in the coaxial heat exchanger, make the heat transfer effect reach the optimum.
3. The utility model provides a coaxial heat exchanger, refrigerant import have the interval to set up and be in a plurality of on the outer tube, select different refrigerant import to let in the refrigerant, the final temperature that obtains from the total export exhaust refrigerant of refrigerant will be different, consequently can satisfy multiple heat transfer needs.
4. The utility model provides a coaxial heat exchanger, first refrigerant export through the reposition of redundant personnel structure respectively with the export of second refrigerant and the total import intercommunication of refrigerant, when being used for the condenser, make the refrigerant enter into coaxial heat exchanger from the total export of refrigerant in, then the refrigerant in the heat exchanger through with the secondary refrigerant's countercurrent flow, from the export of first refrigerant towards the total import of refrigerant and discharge to realize this coaxial heat exchanger to the application of condenser, increase the range of application.
5. The utility model provides a coaxial heat exchanger, the whole adverse current of refrigerant is realized through a plurality of pipelines, three-way valve and check valve to the reposition of redundant personnel structure to guarantee the normal use in the condenser, guarantee the heat transfer effect.
6. The utility model provides a coaxial heat exchanger through the second three-way valve, with total import of refrigerant, first refrigerant export and refrigerant import intercommunication to realized guaranteeing only to have a total import of refrigerant, the dress of the heat exchanger of being convenient for connects.
7. The utility model provides an evaporator, owing to include any one of above-mentioned scheme coaxial heat exchanger, consequently have any one of above-mentioned advantage.
8. The utility model provides a condenser owing to include any one of above-mentioned scheme coaxial heat exchanger, consequently have any one of above-mentioned advantage.
9. The utility model provides a refrigerating system, owing to include in the above-mentioned scheme evaporimeter and/or condenser, consequently have the above-mentioned arbitrary advantage.
10. The utility model provides a refrigerant heat transfer method, through reposition of redundant personnel the refrigerant in coaxial heat exchanger, make the temperature from different refrigerant export exhaust refrigerant produce the difference, then make the reposition of redundant personnel refrigerant of different temperatures converge again in the refrigerant total export, thereby make the refrigerant after converging satisfy the requirement of complete heat transfer, and neutralize two export exhaust refrigerant temperature, so that improve with the not enough of secondary refrigerant following current superheat degree, avoid because of with the secondary refrigerant high overheat and will satisfy the heat transfer volume demand against the current, after the compressor compression, refrigerant pressure is too high to lead to the damage of back-order local part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a first embodiment of the present invention.
Fig. 2 is a schematic perspective view of a second embodiment of the present invention.
Fig. 3 is a schematic perspective view of a third embodiment of the present invention.
Description of reference numerals:
1. a secondary refrigerant inlet; 2. a secondary refrigerant outlet; 3. a refrigerant inlet; 4. a first refrigerant outlet; 5. a second refrigerant outlet; 6. a main refrigerant outlet; 7. a first connecting pipe; 8. a second connecting pipe; 9. a third connecting pipe; 10. a first three-way valve; 11. a second three-way valve; 12. a first check valve; 13. a second one-way valve; 14. a third check valve; 15. a refrigerant inlet.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, the coaxial heat exchanger provided in this embodiment includes an inner tube and an outer tube, one end of the inner tube has a refrigerant inlet 1, and the other end has a refrigerant outlet 2, the outer tube is concentrically sleeved outside the inner tube, and a channel is formed between the outer tube and the inner tube.
The channel has a first refrigerant outlet 4 at one end of the outer tube and a second refrigerant outlet 5 at the other end, the channel has one refrigerant inlet 3 in the outer tube between the first 4 and second 5 refrigerant outlets, the first refrigerant inlet 3 being located at an intermediate position between the first 4 and second 5 refrigerant outlets.
The first refrigerant outlet 4 and the second refrigerant outlet 5 are communicated through a first connecting pipe 7 and then flow out through a refrigerant main outlet 6, and the refrigerant main outlet 6 is arranged on the first connecting pipe 7.
When the coaxial heat exchanger is used, secondary refrigerant enters the inner pipe from the secondary refrigerant inlet 1 of the coaxial heat exchanger and is discharged from the secondary refrigerant outlet 2, and circulates all the time so as to exchange heat with the refrigerant. And (3) introducing the refrigerant into a channel of the coaxial heat exchanger from the middle refrigerant inlet 3, dividing the refrigerant in the coaxial heat exchanger, enabling part of the refrigerant to flow in the direction countercurrent to the secondary refrigerant, enabling the other part of the refrigerant to flow in the direction parallel to the secondary refrigerant, discharging the refrigerant from different refrigerant outlets respectively, and then converging the refrigerant from the main refrigerant outlet 6 to finish the heat exchange between the refrigerant and the secondary refrigerant.
As an alternative embodiment, the refrigerant inlet 3 may be provided at a position other than the intermediate position between the two refrigerant outlets, and the refrigerant outlets may be provided at three or more so that the refrigerant discharged from the refrigerant outlet has more temperature.
In the coaxial heat exchanger of the embodiment, the shell-side refrigerant and the tube-side secondary refrigerant in the coaxial heat exchanger have two flow modes of forward flow and reverse flow, the refrigerant enters from one end, then is divided into multiple paths, is gathered at an outlet, and is finally connected with the air suction end of the compressor. The connection mode of one-in and multiple-out of the refrigerant can reduce the flow of each path of refrigerant, further reduce the pressure drop, increase the actual heat transfer temperature difference of the heat exchanger and increase the heat exchange performance. The overall pressure drop of the refrigerant of the heat exchanger is reduced, the actual heat transfer temperature difference of the heat exchanger is improved, and the heat exchange performance of the heat exchanger is improved. The refrigerant one-inlet-multiple-outlet connection mode can reduce the misoperation frequency of a system expansion valve caused by insufficient evaporation superheat degree, reduce the loss power of a compressor caused by superheat degree deviation, reduce the redundant loss of the system and have more obvious heat exchange effect.
On the downstream side, the refrigerant outlet is not overheated and is not completely evaporated, on the upstream side, the refrigerant outlet has a large overheating degree generated by heat transfer temperature difference, and at the outlet, the refrigerants on two sides are subjected to mixed heat exchange to generate total overheating at the outlet of the heat exchanger, so that the danger of incomplete evaporation, liquid entrainment of the sucked gas of the compressor and liquid impact can be prevented. The superheat degree of the outlet of the heat exchanger is relatively high, the misoperation frequency of the expansion valve and the loss power of the compressor can be reduced, the energy efficiency of the whole machine is improved, the traditional heat exchanger is not needed, a large heat exchange area is required to overheat gas, and the whole heat exchange effect of the heat exchanger is good.
Example 2
As shown in fig. 2, the coaxial heat exchanger provided in this embodiment has substantially the same structure as the coaxial heat exchanger described in embodiment 1, except that: the refrigerant inlet 3 of the embodiment is provided with a plurality of inlets, can be used as standby inlets for adapting to different heat exchange requirements, has variable positions, can be changed along with requirements, and has an increased application range. Specifically, the coaxial heat exchanger of the present embodiment includes an inner tube and an outer tube, one end of the inner tube has a refrigerant inlet 1, and the other end has a refrigerant outlet 2, the outer tube is sleeved outside the inner tube, and a channel is provided between the outer tube and the inner tube.
The channel is provided with five refrigerant inlets 3 and two refrigerant outlets on the outer pipe, the two refrigerant outlets comprise a first refrigerant outlet 4 and a second refrigerant outlet 5, the two refrigerant outlets are respectively arranged at two ends of the channel, the two refrigerant outlets are communicated through a first connecting pipe 7 and then lead to a refrigerant main outlet 6, and the five refrigerant inlets 3 are arranged on a pipe body of the outer pipe between the two refrigerant outlets at intervals.
When the refrigerating device is used, one refrigerating agent inlet 3 is selected to be introduced with refrigerating agents, other refrigerating agent inlets 3 are plugged, and then heat exchange between the refrigerating agents and secondary refrigerating agents is carried out.
Example 3
As shown in fig. 3, the present embodiment provides a coaxial heat exchanger, which has a structure substantially the same as that of the coaxial heat exchanger described in embodiment 1 or embodiment 2, except that: the first refrigerant outlet 4 is communicated with the second refrigerant outlet 5 through a flow dividing structure, and is also communicated with a refrigerant main inlet 15; before each of the refrigerant inlets 3, a third check valve 14 is provided to communicate toward the refrigerant inlet 3.
Specifically, the shunting structure includes: a second connecting pipe 8, a first check valve 12 and a second check valve 13; one end of the second connecting pipe 8 is connected to the first refrigerant outlet 4, and the other end is connected to a second check valve 13 through a first three-way valve 10, wherein the orientation of the second check valve 13 is: leading in the direction of the refrigerant inlet port 15.
The first check valve 12 is disposed on the first connecting pipe 7 between the main refrigerant outlet 6 and the first three-way valve 10 and opens in the direction of the main refrigerant outlet 6.
In addition, the shunting structure still includes: and a second three-way valve 11 connected between the refrigerant inlet 15 and the second check valve 13, and a third end communicated with the refrigerant inlet 3 through a third connection pipe 9, and a third check valve 14 may be provided on the third connection pipe 9.
When the refrigerant main outlet 6 is used as an actual refrigerant inlet, and the refrigerant main inlet 15 is used as an actual refrigerant outlet, the coaxial heat exchanger can be used as a condenser; when the refrigerant inlet 15 is used as an inlet and the refrigerant outlet 6 is used as an outlet, the coaxial heat exchanger can be used as an evaporator. The working principle of the evaporator is the same as that of the working principle of the embodiment 1 and the embodiment 2.
When the coaxial heat exchanger works as a condenser, secondary refrigerant enters the inner pipe from a secondary refrigerant inlet 1 of the coaxial heat exchanger and is discharged from a secondary refrigerant outlet 2, and the secondary refrigerant circulates all the time so as to exchange heat with the refrigerant. The refrigerant passes from the refrigerant main outlet 6 into the channel of the coaxial heat exchanger, and the refrigerant is cut off at the first check valve 12 and can only flow towards the second refrigerant outlet 5 so as to enter the channel in the coaxial heat exchanger.
Where the refrigerant flows in the channel through the refrigerant inlet 3, it cannot flow out of the channel from the refrigerant inlet 3 because it is blocked by the third check valve 14, and the refrigerant can flow only further along the flow path.
After the refrigerant flows out of the flow channel from the first refrigerant outlet 4, the refrigerant does not flow toward the inlet through the first check valve 12 due to the lower pressure than that at the inlet, but flows out only toward the second three-way valve 11 through the second check valve, and at the second three-way valve 11, the refrigerant does not flow toward the refrigerant inlet 3 due to the lower pressure of the refrigerant at this time, but is discharged only from the refrigerant main inlet 15.
Example 4
The embodiment provides an evaporator, which is used for evaporating and exchanging heat of a refrigerant in a refrigeration system, and comprises the coaxial heat exchanger described in embodiment 1, embodiment 2 or embodiment 3, and the coaxial heat exchanger is used for exchanging heat between the refrigerant and a secondary refrigerant; when the coaxial heat exchangers of the embodiment 1 and the embodiment 2 are applied, the same as the application method of the coaxial heat exchangers, when the coaxial heat exchanger of the embodiment 3 is applied, the refrigerant is enabled to be in a partially countercurrent and partially concurrent state with the secondary refrigerant in the coaxial heat exchanger by taking the primary refrigerant inlet 15 of the coaxial heat exchanger as an inlet and taking the primary refrigerant outlet 6 as an outlet.
Example 5
The embodiment provides a condenser, which is used for condensing and exchanging heat of a refrigerant in a refrigeration system, and comprises the coaxial heat exchanger described in embodiment 3, and the coaxial heat exchanger is used for exchanging heat between the refrigerant and a secondary refrigerant; specifically, the refrigerant main outlet 6 of the coaxial heat exchanger is used as an inlet, and the refrigerant main inlet 15 of the coaxial heat exchanger is used as an outlet, so that the refrigerant and the secondary refrigerant are kept in a full-countercurrent state in the coaxial heat exchanger.
Example 6
This embodiment provides a refrigeration system, which includes the evaporator described in embodiment 4 and/or the condenser described in embodiment 5, and performs heat exchange for evaporation or condensation of refrigerant by using the evaporator and/or the condenser.
Example 7
The embodiment provides a refrigerant heat exchange method, which comprises the following steps:
the refrigerant is introduced into a refrigerant inlet 3 of the coaxial heat exchanger.
Part of the refrigerant flows in the direction opposite to the direction of the coolant, and part of the refrigerant flows in the same direction as the direction of the coolant.
And the refrigerants are converged at a refrigerant main outlet 6 and discharged out of the coaxial heat exchanger.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (9)
1. A coaxial heat exchanger comprises an inner pipe and an outer pipe, wherein one end of the inner pipe is provided with a refrigerant inlet (1), the other end of the inner pipe is provided with a refrigerant outlet (2), the outer pipe is sleeved outside the inner pipe, and a channel is arranged between the outer pipe and the inner pipe; it is characterized in that the preparation method is characterized in that,
said channel having at least one refrigerant inlet (3) and at least two refrigerant outlets on said outer tube;
the refrigerant outlets are spaced, communicated through a first connecting pipe (7) and then led to a main refrigerant outlet (6);
the refrigerant inlet (3) is arranged between at least two spaced refrigerant outlets.
2. The coaxial heat exchanger according to claim 1, wherein the refrigerant outlet has two, including a first refrigerant outlet (4) and a second refrigerant outlet (5), the two refrigerant outlets being respectively provided at both ends of the channel.
3. The coaxial heat exchanger according to claim 2, wherein the refrigerant inlet (3) is provided in plurality, spaced apart on the outer tube.
4. The coaxial heat exchanger according to claim 2 or 3, wherein the first refrigerant outlet (4) communicates with the second refrigerant outlet (5) and the refrigerant main inlet (15) through a flow dividing structure, respectively; and before each refrigerant inlet (3), a third one-way valve (14) conducting towards the refrigerant inlet (3) is arranged.
5. The coaxial heat exchanger of claim 4, wherein the flow splitting structure comprises:
one end of the second connecting pipe (8) is connected with the first refrigerant outlet (4), and the other end of the second connecting pipe is respectively communicated with the second refrigerant outlet (5) and the refrigerant main inlet (15) through a first three-way valve (10);
a first non-return valve (12) arranged on the first connecting pipe (7), located between the main refrigerant outlet (6) and the first three-way valve (10), and conducting in the direction of the main refrigerant outlet (6);
and the second one-way valve (13) is connected between the first three-way valve (10) and the refrigerant main inlet (15) and is communicated towards the direction of the refrigerant main inlet (15).
6. The coaxial heat exchanger of claim 5, wherein the flow splitting structure further comprises:
and the second three-way valve (11) is connected between the second one-way valve (13) and the refrigerant main inlet (15), and the third end of the second three-way valve is connected with a third one-way valve (14) before the refrigerant inlet (3).
7. An evaporator comprising the coaxial heat exchanger of any one of claims 1 to 6.
8. A condenser, characterized by comprising the coaxial heat exchanger of any one of claims 4 to 6.
9. A refrigeration system comprising the evaporator of claim 7 and/or the condenser of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920820996.9U CN210179940U (en) | 2019-05-31 | 2019-05-31 | Coaxial heat exchanger, evaporator, condenser and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920820996.9U CN210179940U (en) | 2019-05-31 | 2019-05-31 | Coaxial heat exchanger, evaporator, condenser and refrigerating system |
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| CN210179940U true CN210179940U (en) | 2020-03-24 |
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| CN201920820996.9U Active CN210179940U (en) | 2019-05-31 | 2019-05-31 | Coaxial heat exchanger, evaporator, condenser and refrigerating system |
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| CN (1) | CN210179940U (en) |
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