CN112524849A - Heat exchange system and defrosting method thereof without hand heat supply source and capable of recycling waste cold - Google Patents
Heat exchange system and defrosting method thereof without hand heat supply source and capable of recycling waste cold Download PDFInfo
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- CN112524849A CN112524849A CN201910879962.1A CN201910879962A CN112524849A CN 112524849 A CN112524849 A CN 112524849A CN 201910879962 A CN201910879962 A CN 201910879962A CN 112524849 A CN112524849 A CN 112524849A
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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Abstract
The invention discloses a heat exchange system and a defrosting method thereof without a hand heat supply source and capable of recycling waste cold. The invention controls the flow direction of the fluid, alternately carries out cooling and defrosting operations by the first heat exchange group and the second heat exchange group, can solve the problem that the conventional cooling system needs to be additionally provided with a defrosting device, and provides the device which can continuously carry out recovery operation, does not need to use extra energy to defrost and carries out precooling by waste cold.
Description
Technical Field
The invention relates to defrosting operation, in particular to a heat exchange system and a defrosting method thereof which has no hand-free heat supply source and can recycle waste cold.
Background
When the cooling system is used for heat exchange, when the temperature of the fins or the tube banks of the cooling system is lower than the freezing point of some substances in the environment, the substances are solidified on the fins or the tube banks, and the frosting phenomenon is generated. Frost attached to the fins or the tube bank negatively affects heat conduction and heat convection, so that the heat exchange efficiency of the refrigeration system is reduced.
In order to avoid the frost formation phenomenon from reducing the heat exchange efficiency of the refrigeration system, the refrigeration system is usually defrosted by a compressor stop method, an electric defrosting method, a water spray defrosting method or a non-freezing liquid defrosting method. The compressor stopping method is to stop the compressor in the system, stop the input of refrigerant, and only allow the fan in the system to continue to operate to defrost in a heat convection manner. The electric heating defrosting method is that an electric heating tube, an electric heater and other devices are added in the system, and under the condition that the compressor is stopped to input the refrigerant, electric energy is consumed to generate heat energy, so that fins and tube banks arranged in the system are defrosted. The water spray defrosting method is also a method of spraying water having a temperature higher than the temperature of the fins or the tube bank to defrost the fins or the tube bank when the compressor is stopped. The defrosting method of the unfrozen liquid is to add an unfrozen liquid pump and an unfrozen liquid pipeline in the system to defrost fins or tube banks by the heated unfrozen liquid.
In the above defrosting methods, the heat exchanger cannot continuously perform heat exchange without stopping the operation of the compressor; otherwise, additional energy supply and heat energy generation are required, which is less economical in energy application. For the automated modern industry, the conventional defrosting means and method of the refrigeration system cannot meet the requirements of mass production and manufacturing, and also does not meet the requirements of energy saving and carbon reduction, and further improvement and adjustment are still needed.
Disclosure of Invention
The invention aims to provide a heat exchange system and a defrosting method thereof without a hand-held heat supply source and capable of recycling waste cold, and aims to solve the problems that in the existing cooling system, refrigeration operation needs to be interrupted, a device for defrosting needs to be additionally arranged, and energy needs to be additionally provided for defrosting. The heat exchange system and the defrosting method thereof have no hand-supply heat source and can recycle waste cold, and the purposes of continuously cooling, saving the cost of additionally purchasing a defrosting device and providing energy for heating and defrosting and saving energy consumed by defrosting can be achieved.
The heat exchange system provided by the invention for solving the technical problem comprises:
an introducer for communicating with a fluid source;
a leading-out piece for communicating with a recovery device;
a first pipeline assembly, which includes a first heat exchange control valve, a first confluence member, a first heat exchange set, a first split member and a first export control valve, wherein the first heat exchange control valve, the first confluence member, the first heat exchange set, the first split member and the first export control valve are sequentially arranged from the import member to the export member and are located between the import member and the export member, the first heat exchange control valve is communicated with the import member, the first heat exchange control valve, the first confluence member, the first heat exchange set, the first split member and the first export control valve are sequentially communicated from the import member to the export member, the first heat exchange set includes at least one heat exchanger, and the first export control valve is communicated with the export member;
a second pipeline assembly, which includes a second heat exchange control valve, a second confluence member, a second heat exchange group, a second shunt member and a second lead-out control valve, wherein the second heat exchange control valve, the second confluence member, the second heat exchange group, the second shunt member and the second lead-out control valve are sequentially arranged from the lead-in member toward the lead-out member and are located between the lead-in member and the lead-out member, the second heat exchange control valve is communicated with the lead-in member, the second heat exchange control valve, the second confluence member, the second heat exchange group, the second shunt member and the second lead-out control valve are sequentially communicated from the lead-in member toward the lead-out member, the second heat exchange group includes at least one heat exchanger, and the second lead-out control valve is communicated with the lead-out member;
the first communication pipeline assembly is communicated with the first pipeline assembly and the second pipeline assembly and comprises a first communication control valve, and the first communication control valve is communicated with the first flow dividing piece and the second flow converging piece; and
and the second communication pipeline component is communicated with the first pipeline component and the second pipeline component, and comprises a second communication control valve, and the second communication control valve is communicated with the second flow dividing piece and the first confluence piece.
The heat exchange system, wherein the working temperature of at least one heat exchanger of the first heat exchange group and the working temperature of at least one heat exchanger of the second heat exchange group are decreased progressively in sequence from the leading-in part to the leading-out part.
The invention provides a defrosting method which solves the technical problems and is provided with a hand-free heat supply source and can recycle waste cold, comprising the following steps:
a fluid introducing step: the method comprises the following steps of introducing a fluid substance to be cooled into the heat exchange system, and under the condition that a heat exchange set of one pipeline assembly cannot perform cooling operation due to frosting and a heat exchange set of the other pipeline assembly is used as a cold source to perform cooling operation on the substance to be cooled, introducing the substance to be cooled into one pipeline assembly which cannot perform cooling operation;
a defrosting and precooling step: the substance to be cooled, which is led into the pipeline assembly which cannot be cooled, enters the heat exchange group of the pipeline assembly to defrost the frosted heat exchange group; the material to be cooled exchanges heat with the frost condensed in the heat exchange group and the refrigerant remained in the heat exchange group, and is precooled; and
and (3) cooling: and the material to be cooled is guided into the other heat exchange group of the pipeline assembly by the heat exchange group to carry out heat exchange, so that the temperature of the material to be cooled is reduced, and the material to be cooled is cooled.
The technical means of the invention can obtain the following beneficial effects:
1. the heat exchange system is provided with the first pipeline assembly, the second pipeline assembly, the first communicating pipeline assembly and the second communicating pipeline assembly which are communicated, and the first pipeline assembly and the second pipeline assembly are respectively provided with the first heat exchange group and the second heat exchange group, so that the first heat exchange group and the second heat exchange group can alternately perform cooling and defrosting operations by controlling the flow direction of fluid, and further, the purpose of continuously performing cooling operation is achieved.
2. The first communicating pipeline assembly is communicated with the first pipeline assembly and the second pipeline assembly, and the second communicating pipeline assembly is communicated with the first pipeline assembly and the second pipeline assembly, so that the heat energy carried by a substance to be cooled can be used as a defrosting heat source to defrost, extra heat energy is not required to be provided for defrosting, the energy consumed by defrosting can be saved, and the cost for purchasing a defrosting device can be saved.
3. The invention recycles the cold energy which is originally wasted, enables the substance to be cooled to exchange heat with frost and residual refrigerant, precools the substance to be cooled which is to be cooled by utilizing the cold energy which is originally ineffective and wasted, and can save the energy consumed by the heat exchange set when cooling.
Drawings
FIG. 1 is a schematic diagram of a piping arrangement according to a preferred embodiment of the present invention.
FIG. 2 is a schematic view of the piping configuration of a single heat exchange set according to the preferred embodiment of the present invention.
FIG. 3 is a flow chart of the recovery method of the present invention.
FIG. 4 is a schematic flow diagram illustrating the operation of the preferred embodiment of the present invention.
FIG. 5 is another schematic flow diagram illustrating the operation of the preferred embodiment of the present invention.
FIG. 6 is a schematic view of another embodiment of the present invention.
Detailed Description
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings, wherein:
as shown in fig. 1, the heat exchange system of the present invention includes an inlet 10, an outlet 20, a first pipe assembly 30, a second pipe assembly 40, a first communicating pipe assembly 50 and a second communicating pipe assembly 60; the first pipeline assembly 30 is communicated with the leading-in part 10 and the leading-out part 20, the second pipeline assembly 40 is communicated with the leading-in part 10 and the leading-out part 20, the first communicating pipeline assembly 50 is communicated with the first pipeline assembly 30 and the second pipeline assembly 40, and the second communicating pipeline assembly 60 is communicated with the first pipeline assembly 30 and the second pipeline assembly 40.
As shown in fig. 1, the inlet 10 includes three ports, one of the ports of the inlet 10 is connected to a fluid source (not shown), and the other two ports of the inlet 10 are connected to the first and second conduit assemblies 30 and 40, respectively. Specifically, the introducing member 10 is a three-way joint; the leading-out part 20 includes three ports, one port of the leading-out part 20 is communicated with a recovery device (not shown), and the other two ports of the leading-out part 20 are respectively communicated with the first pipeline assembly 30 and the second pipeline assembly 40.
As shown in fig. 1, the first pipeline assembly 30 includes a first heat exchange control valve 31, a first confluence part 32, a first heat exchange set 33, a first split part 34 and a first lead-out control valve 35; wherein, the first heat exchange control valve 31, the first confluence piece 32, the first heat exchange group 33, the first shunt piece 34 and the first lead-out control valve 35 are sequentially arranged from the lead-in piece 10 to the lead-out piece 20, and the above components are located between the lead-in piece 10 and the lead-out piece 20; the first heat exchange control valve 31 is communicated with the leading-in part 10, and the first heat exchange control valve 31, the first confluence part 32, the first heat exchange group 33, the first flow dividing part 34 and the first leading-out control valve 35 are communicated in sequence from the leading-in part 10 to the leading-out part 20; the first heat exchange set 33 comprises at least one heat exchanger for exchanging heat with the substance to be cooled, into which the fluid of the present invention is introduced, cooling and lowering the temperature of the substance to be cooled, and the operating temperature of the at least one heat exchanger decreases in sequence from the introducing part 10 toward the leading-out part 20; the first lead-out control valve 35 communicates with the lead-out member 20.
As shown in fig. 1, the second pipeline assembly 40 is similar to the first pipeline assembly 30 in configuration, and the second pipeline assembly 40 includes a second heat exchange control valve 41, a second confluence member 42, a second heat exchange set 43, a second diversion member 44 and a second export control valve 45; wherein, the second heat exchange control valve 41, the second confluence part 42, the second heat exchange group 43, the second flow splitting part 44 and the second outlet control valve 45 are sequentially arranged from the inlet 10 to the outlet 20 and located between the inlet 10 and the outlet 20; the second heat exchange control valve 41 is communicated with the leading-in part 10, and the second heat exchange control valve 41, the second confluence part 42, the second heat exchange group 43, the second flow dividing part 44 and the second leading-out control valve 45 are communicated in sequence from the leading-in part 10 toward the leading-out part 20; the second heat exchange group 43 also comprises at least one heat exchanger for exchanging heat with the fluid substance to be cooled; the second lead-out control valve 45 communicates with the lead-out member 20.
In the preferred embodiment of the present invention, the first heat exchanging set 33 is provided with two heat exchangers, and the heat exchangers of the first heat exchanging set 33 are divided into a first heat exchanger and a second heat exchanger in sequence from the leading-in part 10 to the leading-out part 20; the working temperature of the first heat exchanger of the first heat exchange group 33 is-3 ℃, and the working temperature of the second heat exchanger of the first heat exchange group 33 is-20 ℃; the second heat exchanging set 43 is provided with two heat exchangers, and the heat exchangers of the second heat exchanging set 43 are divided into a first heat exchanger and a second heat exchanger from the leading-in part 10 to the leading-out part 20 in sequence; the operating temperature of the first heat exchanger of the second heat exchange group 43 is-3 ℃, and the operating temperature of the second heat exchanger of the second heat exchange group 43 is-20 ℃; both the first heat exchange group 33 and the second heat exchange group 43 of the present invention are provided with at least one heat exchanger; or as shown in fig. 2, the first heat exchange group 33 and the second heat exchange group 43 can be a combination of a plurality of heat exchangers, so that the cooling load of each heat exchanger can be reduced, the excessive cooling load of each heat exchanger can be avoided, and the reduction of energy consumption spent on cooling by each heat exchange group is facilitated.
As shown in fig. 1, the first communicating pipe assembly 50 is communicated with the first pipe assembly 30 and the second pipe assembly 40, the first communicating pipe assembly 50 includes a first communicating control valve 51, and the first communicating control valve 51 is communicated with the first flow dividing member 34 and the second flow converging member 42; the second communicating pipe assembly 60 is communicated with the first pipe assembly 30 and the second pipe assembly 40, the second communicating pipe assembly 60 includes a second communicating control valve 61, and the second communicating control valve 61 is communicated with the second flow dividing member 44 and the first confluence member 32.
As shown in fig. 6, in application, the first confluence member 32 can be replaced with a three-way valve 32A, and the first heat exchange control valve 31 and the second communication control valve 61 are omitted; the second confluence member 42 can be replaced with a three-way valve 42A, and the second heat exchange control valve 41 and the first communication control valve 51 are omitted; the lead-out member 20 can be replaced with a three-way valve 20A, and the lead-out control valve 35 and the second lead-out control valve 45 are omitted. The flow direction of the fluid is controlled by the three-way valve 32A, the three-way valve 42A, and the three-way valve 20A described above.
As shown in fig. 3 and 4, the defrosting method using the heat exchange system for hands-free heat supply and waste heat recovery according to the present invention includes a fluid introducing step S1, a defrosting pre-cooling step S2, and a cooling step S3.
Fluid introduction step S1: as shown in fig. 4, when the first heat exchange set 33 cannot perform the cooling operation due to frosting, and the cooling medium of the first heat exchange set 33 is no longer supplied, but the second heat exchange set 43 is used as the cooling source to perform the cooling operation on the substance to be cooled; the first heat exchange control valve 31 is opened and the second heat exchange control valve 41 is closed, so that the material to be cooled, which has a temperature higher than the operating temperature of the first heat exchange set 33 and the second heat exchange set 43, is first introduced into the first pipe assembly 30. The substance to be cooled is fluid and volatile oil gas, or other organic matters needing to be recovered, or only substances needing to be cooled.
Defrost pre-cooling step S2: when the material to be cooled introduced into the first pipe assembly 30 passes through the first confluence part 32, the second communication control valve 61 is closed, so that the material to be cooled enters the first heat exchange group 33 to defrost the first heat exchange group 33. In the defrosting and precooling step S2, the original heat energy of the substance to be cooled is utilized to defrost, and no additional equipment or device for defrosting is needed or no additional heat source is needed to defrost; in addition, in the defrosting and precooling step S2, the substance to be cooled exchanges heat with not only the frost condensed in the first heat exchange group 33 but also the refrigerant remaining in the first heat exchange group 33, and the substance to be cooled which is about to enter the second heat exchange group 43 is precooled by the cold energy which is useless and wasted originally, so that the cold energy which is wasted originally is recycled.
Cooling step S3: the first communication control valve 51 is opened, and the material to be cooled is introduced into the second heat exchange group 43 from the first heat exchange group 33 through the first communication pipeline assembly 50 to exchange heat with the heat exchangers therein, so that the temperature of the material to be cooled is reduced, and the purpose of cooling is achieved; because the material to be cooled is pre-cooled and cooled in the first heat exchange set 33 before entering the second heat exchange set 43, the energy consumed by cooling the second heat exchange set 43 can be saved.
Recovery step S4: after the cooling step S3, a recovery step S4 can be performed, in which the cooled material passes through the second heat exchange set 43 and passes through the second flow divider 44, at which time the second communication control valve 61 is closed and the second outlet control valve 45 is opened, so that the cooled material enters the recovery device through the outlet 20 and is collected.
After the second heat exchange set 43 operates for a period of time, the second heat exchange set 43 starts to frost and cannot continue to perform the cooling operation; on the contrary, as shown in fig. 5, the first heat exchange control valve 31 is closed to introduce the substance to be cooled into the second pipeline assembly 40, and the substance to be cooled exchanges heat with the second heat exchange group 43, so as to pre-cool the substance to be cooled while defrosting the second heat exchange group 43; after that, the substance to be cooled is introduced into the first heat exchange set 33 via the second communication pipe assembly 60 for cooling. The invention can make the first heat exchange group 33 and the second heat exchange group 43 alternately perform cooling and defrosting operations, and can provide continuous refrigeration requirements in accordance with occasions requiring continuous refrigeration and frosting.
Compared with the prior cooling system which needs to interrupt the refrigeration operation, needs to add a device for defrosting and needs to provide energy for defrosting additionally during defrosting, the invention controls the flow direction of fluid to ensure that the first heat exchange group 33 and the second heat exchange group 43 alternately carry out the cooling operation and the defrosting operation, thereby being capable of carrying out the cooling operation continuously and uninterruptedly and being suitable for various fields needing continuous refrigeration; in addition, in the defrosting and precooling step S2, the original heat energy of the substance to be cooled is utilized to defrost the first heat exchange group 33 or the second heat exchange group 43, and no additional equipment or device for defrosting is needed, and no additional heat source is needed to be provided for defrosting, so that various expenses for defrosting can be saved; finally, in the defrosting and pre-cooling step S2, the cold energy that is not used and wasted originally is used to pre-cool the substance to be cooled that is about to enter the second heat exchange group 43, and the cold energy that is wasted originally is recycled, so that the energy consumed by cooling the second heat exchange group 43 is saved.
Claims (3)
1. A heat exchange system, comprising:
an introducer for communicating with a fluid source;
a leading-out piece for communicating with a recovery device;
a first pipeline assembly, which includes a first heat exchange control valve, a first confluence member, a first heat exchange set, a first split member and a first export control valve, wherein the first heat exchange control valve, the first confluence member, the first heat exchange set, the first split member and the first export control valve are sequentially arranged from the import member to the export member and are located between the import member and the export member, the first heat exchange control valve is communicated with the import member, the first heat exchange control valve, the first confluence member, the first heat exchange set, the first split member and the first export control valve are sequentially communicated from the import member to the export member, the first heat exchange set includes at least one heat exchanger, and the first export control valve is communicated with the export member;
a second pipeline assembly, which includes a second heat exchange control valve, a second confluence member, a second heat exchange group, a second shunt member and a second lead-out control valve, wherein the second heat exchange control valve, the second confluence member, the second heat exchange group, the second shunt member and the second lead-out control valve are sequentially arranged from the lead-in member toward the lead-out member and are located between the lead-in member and the lead-out member, the second heat exchange control valve is communicated with the lead-in member, the second heat exchange control valve, the second confluence member, the second heat exchange group, the second shunt member and the second lead-out control valve are sequentially communicated from the lead-in member toward the lead-out member, the second heat exchange group includes at least one heat exchanger, and the second lead-out control valve is communicated with the lead-out member;
the first communication pipeline assembly is communicated with the first pipeline assembly and the second pipeline assembly and comprises a first communication control valve, and the first communication control valve is communicated with the first flow dividing piece and the second flow converging piece; and
and the second communication pipeline component is communicated with the first pipeline component and the second pipeline component, and comprises a second communication control valve, and the second communication control valve is communicated with the second flow dividing piece and the first confluence piece.
2. The heat exchange system of claim 1, wherein the operating temperature of the at least one heat exchanger of the first heat exchange set and the operating temperature of the at least one heat exchanger of the second heat exchange set each decrease in order from the inlet toward the outlet.
3. A defrosting method which has no hand heat supply source and can recycle waste cold is characterized by comprising the following steps:
a fluid introducing step: introducing a fluid substance to be cooled into the heat exchange system according to claim 1, wherein in a situation where the heat exchange set of one of the pipeline assemblies cannot perform a cooling operation due to frosting and the heat exchange set of the other pipeline assembly is used as a cold source to perform a cooling operation on the substance to be cooled, the substance to be cooled is first introduced into the pipeline assembly which cannot perform the cooling operation;
a defrosting and precooling step: the substance to be cooled, which is led into the pipeline assembly which cannot be cooled, enters the heat exchange group of the pipeline assembly to defrost the frosted heat exchange group; the material to be cooled exchanges heat with the frost condensed in the heat exchange group and the refrigerant remained in the heat exchange group, and is precooled; and
and (3) cooling: and the material to be cooled is guided into the other heat exchange group of the pipeline assembly by the heat exchange group to carry out heat exchange, so that the temperature of the material to be cooled is reduced, and the material to be cooled is cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879962.1A CN112524849A (en) | 2019-09-18 | 2019-09-18 | Heat exchange system and defrosting method thereof without hand heat supply source and capable of recycling waste cold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879962.1A CN112524849A (en) | 2019-09-18 | 2019-09-18 | Heat exchange system and defrosting method thereof without hand heat supply source and capable of recycling waste cold |
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| Publication Number | Publication Date |
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| CN112524849A true CN112524849A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910879962.1A Pending CN112524849A (en) | 2019-09-18 | 2019-09-18 | Heat exchange system and defrosting method thereof without hand heat supply source and capable of recycling waste cold |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6488075A (en) * | 1987-09-28 | 1989-04-03 | Sharp Kk | Air conditioner |
| JPH02254273A (en) * | 1989-03-29 | 1990-10-15 | Aisin Seiki Co Ltd | Engine drive heat pump |
| CN1995878A (en) * | 2005-12-29 | 2007-07-11 | 瑞弘冷冻科技股份有限公司 | Defrosting pipeline for petrochemical gas heat exchanger |
| CN201260899Y (en) * | 2008-06-27 | 2009-06-24 | 上海冷气机厂 | Oil vapour recovering equipment |
| CN203763888U (en) * | 2013-10-16 | 2014-08-13 | 大连举扬科技有限公司 | Dual-channel evaporation technology type oil gas recovery system |
| CN110157460A (en) * | 2019-04-15 | 2019-08-23 | 上海诺冷冷暖设备有限公司 | A kind of refrigeration defroster for petroleum vapor recovery |
-
2019
- 2019-09-18 CN CN201910879962.1A patent/CN112524849A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6488075A (en) * | 1987-09-28 | 1989-04-03 | Sharp Kk | Air conditioner |
| JPH02254273A (en) * | 1989-03-29 | 1990-10-15 | Aisin Seiki Co Ltd | Engine drive heat pump |
| CN1995878A (en) * | 2005-12-29 | 2007-07-11 | 瑞弘冷冻科技股份有限公司 | Defrosting pipeline for petrochemical gas heat exchanger |
| CN201260899Y (en) * | 2008-06-27 | 2009-06-24 | 上海冷气机厂 | Oil vapour recovering equipment |
| CN203763888U (en) * | 2013-10-16 | 2014-08-13 | 大连举扬科技有限公司 | Dual-channel evaporation technology type oil gas recovery system |
| CN110157460A (en) * | 2019-04-15 | 2019-08-23 | 上海诺冷冷暖设备有限公司 | A kind of refrigeration defroster for petroleum vapor recovery |
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Application publication date: 20210319 |
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