CN109269202A - Heat exchanger defrosting structure, refrigeration system, defrosting control method - Google Patents
Heat exchanger defrosting structure, refrigeration system, defrosting control method Download PDFInfo
- Publication number
- CN109269202A CN109269202A CN201810912064.7A CN201810912064A CN109269202A CN 109269202 A CN109269202 A CN 109269202A CN 201810912064 A CN201810912064 A CN 201810912064A CN 109269202 A CN109269202 A CN 109269202A
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- Prior art keywords
- heat exchanger
- air inlet
- air
- heating element
- defrost
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Classifications
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
Abstract
The present invention provides a kind of heat exchanger defrosting structure, refrigeration system, defrosting control method.The heat exchanger defrosting structure is used for refrigeration system, including heat exchanger, heating element, and the heating element has the first air inlet pipe, and industrial waste gas can enter the heating element via first air inlet pipe, and the heating element carries out defrost to the heat exchanger.A kind of heat exchanger defrosting structure according to the present invention, refrigeration system, defrosting control method realize defrost using industrial waste gas heat exchanging device, and defrost efficiency is high, energy conservation and environmental protection.
Description
Technical field
The invention belongs to air-conditioning technique fields, and in particular to a kind of heat exchanger defrosting structure, refrigeration system, defrost control
Method processed.
Background technique
Environmental simulation test room snowfall tail end air port leaving air temp can down to -15 DEG C, in heat exchanger refrigerant temperature can down to -
30 DEG C, under snowfall mode operating condition, heat exchanger easily frosting causes heat exchange manifold gap to block, air cannot flow through gap
Carry out heat exchange.
The heat exchanger of simulation laboratory refrigeration system is due to air duct area limit value, in order to guarantee enough cooling capacity, so setting
Thickness is larger when meter manufacture, using electric heating defrost, not only low efficiency, and also power consumption is big.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that providing a kind of heat exchanger defrosting structure, refrigeration system, defrost control
Method processed realizes defrost using industrial waste gas heat exchanging device, and defrost efficiency is high, energy conservation and environmental protection.
To solve the above-mentioned problems, the present invention provides a kind of heat exchanger defrosting structure, is used for refrigeration system, including heat exchange
Device, heating element, the heating element have the first air inlet pipe, and industrial waste gas can be via described in first air inlet pipe entrance
Heating element, the heating element carry out defrost to the heat exchanger.
Preferably, the frost-removal structure further includes airflow channel, and the heating element, heat exchanger are along the flow direction of air-flow
It is successively laid in the airflow channel.
Preferably, the frost-removal structure further includes air stream drives component, and the heat exchanger, air stream drives component are along air-flow
Flow direction is successively laid in the airflow channel.
Preferably, the airflow channel is configured with the first air inlet, the first air outlet, the second air inlet, the second air outlet,
First air inlet, the first air outlet, the second air inlet, the second air outlet are selectively penetrated through or are closed.
Preferably, second air inlet, and/or, second air outlet is provided with electrically-controlled valve so that described second into
Air port, and/or, second air outlet opens or closes.
Preferably, the heating element has the first escape pipe, and first escape pipe is connect with exhaust treatment component.
Preferably, it is provided with solenoid valve in first air inlet pipe, for controlling industrial waste gas in first air inlet pipe
In cut-off and perforation.
Preferably, the heating element is coil heat exchanger.
The present invention also provides a kind of refrigeration systems, including above-mentioned heat exchanger defrosting structure.
The present invention also provides a kind of defrosting control methods, carry out for the heat exchanger defrosting structure to above-mentioned refrigeration system
Defrost includes the following steps:
The temperature T1 of object space when acquisition first time t1；
The temperature T2 of object space when obtaining the second time t2；
Judge the size relation of T1 and T2, if T2-T1 > Ta DEG C, carries out defrost, if T2-T1≤Ta DEG C, without
Defrost, Ta are the first preset difference value.
Preferably, the t2-t1=20min.
Preferably, the control method is further comprising the steps of: when T1=-15 DEG C and T2-T1 >=Tb, then being changed
Frost, as T1=-15 DEG C and T2-T1 < Tb, then without defrost, Tb is the second preset difference value.
Heat exchanger defrosting structure provided by the invention, refrigeration system, defrosting control method, due to using industrial waste gas via
The heating element and the heat exchanger carry out heat exchange, so that the solidifying frost in the heat exchange manifold gap be made to melt, make gas
Stream flows smoothly, and defrost efficiency is high, since the heat source of defrost is industrial waste gas, is more energy-saving and environmentally friendly.
Detailed description of the invention
Fig. 1 is the theory structure schematic diagram of the refrigeration system of the embodiment of the present invention.
Appended drawing reference indicates are as follows:
1, heat exchanger；11, refrigerant inlet pipe；12, refrigerant outlet pipe；2, heating element；21, the first air inlet pipe；22, the first outlet
Pipe；23, solenoid valve；3, air stream drives component；4, airflow channel；41, the first air inlet；42, the first air outlet；421, automatically controlled more
Leaf air door；43, the second air inlet；44, the second air outlet；100, object space；101, freeze air outlet.
Specific embodiment
It is shown in Figure 1, according to an embodiment of the invention, providing a kind of heat exchanger defrosting structure, it is used for refrigeration system, especially
It is suitable for the refrigeration system of environmental test chamber, including heat exchanger 1, heating element 2, the heating element 2 has the first air inlet
Pipe 21, industrial waste gas can enter the heating element 2 via first air inlet pipe 21, and the heating element 2 is changed described
Hot device 1 carries out defrost.Due to being carried out via the heating element 2 with the heat exchanger 1 using industrial waste gas in the technical solution
Heat exchange keeps airflow smooth so that the solidifying frost in the 1 pipeline gap of heat exchanger be made to melt, and defrost efficiency is high, due to changing
The heat source of frost is industrial waste gas, therefore technical solution is more energy-saving and environmentally friendly.
Specifically, the heating element 2 can the interlaced setting in structure with the heat exchanger 1, to realize institute
It states heating element 2 and the heat exchanger 1 has biggish heat exchange contact surface, to improve defrost efficiency, but consider Industry Waste
Gas contains more harmful substance, this needs conveniently optimizes the heating element 2 in pipe thickness etc., may lead
It causes with the heat exchanger 1 when structure is staggered, increases processing complexity.It is therefore preferred that the frost-removal structure also wraps
Airflow channel 4 is included, the heating element 2, heat exchanger 1 are successively laid in the airflow channel 4 along the flow direction of air-flow,
That is, being that the heating element 2 is independent with the heat exchanger 1 in structure, the heating element 2 and heat exchanger 1 is on the one hand made to exist
Structure design is upper simpler.On the other hand, the industrial waste gas is also prevented to permeate the tube wall of the heating element 2 for a long time
Refrigerant in 1 pipeline of heat exchanger may be polluted.
In order to further increase the efficiency of defrost process, it is preferable that the frost-removal structure further includes air stream drives component 3,
The heat exchanger 1, air stream drives component 3 are successively laid in the airflow channel 4 along the flow direction of air-flow, certainly, described
Air stream drives component 3 is set in the airflow channel 4 under cooling condition, also can be improved the mobility of cooling flow, into
And promote the refrigerating efficiency of refrigeration system.
Preferably, the airflow channel 4 is configured with the first air inlet 41, the first air outlet 42, the second air inlet 43, second
Air outlet 44, first air inlet 41, the first air outlet 42, the second air inlet 43, the second air outlet 44 are selectively
Perforation, which is perhaps closed, may be selected perforation or the first air inlet 41 closed, the first air outlet 42, the second air inlet 43, second
Air outlet 44 keeps defrost operating condition and cooling condition relatively independent, specifically, when defrost operating condition, selects the first air inlet 41, the
One air outlet 42 is in close state, and selects the second air inlet 43, the second air outlet 44 to be in breakthrough status, this prevent changing
Between frost season, due to the adverse effect that temperature of the thermal current in the airflow channel 4 to object space 100 generates, preceding aim
The space that space 100 as needs to freeze.The heating element 2 for example can be coil heat exchanger.
Further, second air inlet 43, and/or, second air outlet 44 is provided with electrically-controlled valve, so that institute
The second air inlet 43 is stated, and/or, second air outlet 44 opens or closes；First air inlet 41, and/or, first goes out
The setting of air port 42 is also correspondingly provided with electrically-controlled valve, such as automatically controlled multi-leaf damper 421, this is conducive to the automation control of defrost process
System.
As mentioned above due to the industrial waste gas contains a large amount of harmful substance, therefore discharge that be preferably able to carry out must to it
The processing wanted, it is preferable that the heating element 2 has the first escape pipe 22, first escape pipe 22 and exhaust treatment component
Connection carries out the removing of harmful substance by the exhaust treatment component to the industrial waste gas, and Processes and apparatus is more mature,
Details are not described herein.
In order to preferably control the opportunity that the industrial waste gas enters the heating element 2, it is preferable that first air inlet
Solenoid valve 23 is provided on pipe 21, for controlling cut-off and perforation of the industrial waste gas in first air inlet pipe 21.
According to an embodiment of the invention, a kind of refrigeration system is also provided, including above-mentioned heat exchanger defrosting structure, wherein changing
Hot device 1 has refrigerant inlet pipe 11, refrigerant outlet pipe 12, and the refrigerant inlet pipe 11 and refrigerant outlet pipe 12 form refrigeration with refrigeration unit and follow
Ring, air-flow are handed over by entering the airflow channel 4 via first air inlet 41 in object space 100 with 1 heat of heat exchanger
The object space 100 successively is turned again to via the first air outlet 42, refrigeration air outlet 101 after changing, to realize to target
The temperature adjustment effect in space 100, aforementioned is air flow direction of the refrigeration system under cooling condition.And at the refrigeration system
When defrost operating condition, outer gas stream flows through the heating element 2 via second air inlet 43 and carries out first time heat exchange, it
Afterwards at the solidifying frost of the pipeline of heat exchanger 1 described in the raised air flow direction of temperature, second of heat exchange is carried out, thus realize defrost, the
Refrigeration system is discharged via second air outlet 44 in air-flow after secondary heat exchange, it is to be understood that during defrost,
First air inlet 41, the first air outlet 42 are all in the closed position, under cooling condition, second air inlet 43,
Two air outlets 44 are all in the closed position.
According to an embodiment of the invention, a kind of defrosting control method is also provided, for the heat exchange to above-mentioned refrigeration system
Device frost-removal structure carries out defrost, includes the following steps:
The temperature T1 of object space 100 when acquisition first time t1；
The temperature T2 of object space 100 when obtaining the second time t2；
Judge the size relation of T1 and T2, if T2-T1 > Ta, carries out defrost, if T2-T1≤Ta, without defrost,
Ta is the first preset difference value.
In the technical solution, the actual temperature of the object space 100 at time point preceding after difference is measured, can be passed through
The difference of T1 and T2 judges the heat exchanger 1 with the presence or absence of solidifying white phenomenon, specifically, surveying twice before rear in process of refrigerastion
When T2, T1 difference that amount obtains are greater than Ta, then it can be determined that solidifying white phenomenon occurs for the heat exchanger 1, need to carry out defrost, it is no
Then, then it is not necessarily to defrost, it is preferably provided as -1 DEG C namely Ta=-1 DEG C by Ta above-mentioned there is no solidifying white phenomenon.
Defrost work frequent progress in order to prevent, adversely affects cooling condition, it is preferable that the t2-t1=
20min。
It is understood that needing to have snowfall mode, so-called snowfall mode is to pass through for environmental test chamber
Water spray after the refrigeration system cools down to laboratory outside namely object space above-mentioned 100 carries out forming corresponding drop
Snow state, and the formation premise of the snowfall mode should be T1 above-mentioned≤
- 15 DEG C, after snowfall, then the temperature to object space 100 is needed to maintain, guarantees that snow deposit does not melt,
That is therefore so-called guarantor's snow mode in the industry when for being T1=-15 DEG C under the operating condition, when T2-T1 >=Tb, then carries out defrost,
When T2-T1 < Tb, then without defrost, Tb is the second preset difference value.Specifically, refrigeration system at this time is to the object space
100 temperature should maintain -15 DEG C ± 1 DEG C namely Tb=1 DEG C more appropriate.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (12)
1. a kind of heat exchanger defrosting structure is used for refrigeration system, which is characterized in that including heat exchanger (1), heating element (2), institute
Heating element (2) are stated with the first air inlet pipe (21), industrial waste gas can enter described add via first air inlet pipe (21)
Thermal part (2), the heating element (2) carry out defrost to the heat exchanger (1).
2. frost-removal structure according to claim 1, which is characterized in that further include airflow channel (4), the heating element
(2), heat exchanger (1) is successively laid in the airflow channel (4) along the flow direction of air-flow.
3. frost-removal structure according to claim 2, which is characterized in that further include air stream drives component (3), the heat exchanger
(1), air stream drives component (3) is successively laid in the airflow channel (4) along the flow direction of air-flow.
4. frost-removal structure according to claim 2, which is characterized in that the airflow channel (4) is configured with the first air inlet
(41), the first air outlet (42), the second air inlet (43), the second air outlet (44), first air inlet (41), the first outlet air
Mouth (42), the second air inlet (43), the second air outlet (44) are selectively penetrated through or are closed.
5. frost-removal structure according to claim 4, which is characterized in that second air inlet (43), and/or, described
Two air outlets (44) are provided with electrically-controlled valve, so that second air inlet (43), and/or, second air outlet (44) is opened
Or it closes.
6. frost-removal structure according to claim 1, which is characterized in that the heating element (2) has the first escape pipe
(22), first escape pipe (22) connect with exhaust treatment component.
7. frost-removal structure according to claim 1, which is characterized in that be provided with solenoid valve on first air inlet pipe (21)
(23), for controlling cut-off and perforation of the industrial waste gas in first air inlet pipe (21).
8. frost-removal structure according to claim 1, which is characterized in that the heating element (2) is coil heat exchanger.
9. a kind of refrigeration system, including heat exchanger defrosting structure, which is characterized in that the heat exchanger defrosting structure is claim
Heat exchanger defrosting structure described in any one of 1 to 8.
10. a kind of defrosting control method, which is characterized in that for refrigeration system described in any item of the claim 1 to 8
Heat exchanger defrosting structure carries out defrost, includes the following steps:
The temperature T1 of object space (100) when acquisition first time t1；
The temperature T2 of object space (100) when obtaining the second time t2；
Judge the size relation of T1 and T2, if T2-T1 > Ta, carries out defrost, if T2-T1≤Ta, without defrost, Ta is
First preset difference value.
11. control method according to claim 10, which is characterized in that the t2-t1=20min.
12. control method according to claim 10, which is characterized in that further comprising the steps of: when T1=-15 DEG C and
When T2-T1 >=Tb, then defrost is carried out, as T1=-15 DEG C and T2-T1 < Tb, then without defrost, Tb is second default poor
Value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912064.7A CN109269202A (en) | 2018-08-10 | 2018-08-10 | Heat exchanger defrosting structure, refrigeration system, defrosting control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912064.7A CN109269202A (en) | 2018-08-10 | 2018-08-10 | Heat exchanger defrosting structure, refrigeration system, defrosting control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109269202A true CN109269202A (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810912064.7A Pending CN109269202A (en) | 2018-08-10 | 2018-08-10 | Heat exchanger defrosting structure, refrigeration system, defrosting control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567056A (en) * | 2019-09-05 | 2019-12-13 | 珠海格力电器股份有限公司 | Central air conditioner |
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|---|---|---|---|---|
| CN105222478A (en) * | 2014-03-19 | 2016-01-06 | 天津大学 | Utilize the method that freezer outside air auxiliary electrical heater defrosts |
| CN205403310U (en) * | 2016-03-03 | 2016-07-27 | 北京嘉元文博科技有限公司 | Storage cabinet |
| CN107843128A (en) * | 2017-11-02 | 2018-03-27 | 朱峰 | A kind of environment-friendly type industrial waste gas waste-heat recovery device |
| CN207187412U (en) * | 2017-09-05 | 2018-04-06 | 天津赛纳特环保工程有限公司 | A kind of new gas processing equipment |
-
2018
- 2018-08-10 CN CN201810912064.7A patent/CN109269202A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222478A (en) * | 2014-03-19 | 2016-01-06 | 天津大学 | Utilize the method that freezer outside air auxiliary electrical heater defrosts |
| CN205403310U (en) * | 2016-03-03 | 2016-07-27 | 北京嘉元文博科技有限公司 | Storage cabinet |
| CN207187412U (en) * | 2017-09-05 | 2018-04-06 | 天津赛纳特环保工程有限公司 | A kind of new gas processing equipment |
| CN107843128A (en) * | 2017-11-02 | 2018-03-27 | 朱峰 | A kind of environment-friendly type industrial waste gas waste-heat recovery device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567056A (en) * | 2019-09-05 | 2019-12-13 | 珠海格力电器股份有限公司 | Central air conditioner |
| CN110567056B (en) * | 2019-09-05 | 2020-08-21 | 珠海格力电器股份有限公司 | Central air conditioner |
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Application publication date: 20190125 |
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