CN205825560U - Airhandling equipment surface cooler surface defrosting mechanism - Google Patents
Airhandling equipment surface cooler surface defrosting mechanism Download PDFInfo
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- CN205825560U CN205825560U CN201620765770.XU CN201620765770U CN205825560U CN 205825560 U CN205825560 U CN 205825560U CN 201620765770 U CN201620765770 U CN 201620765770U CN 205825560 U CN205825560 U CN 205825560U
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- surface cooler
- blower fan
- casing
- airhandling equipment
- pressure difference
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Abstract
This utility model discloses a kind of airhandling equipment surface cooler surface defrosting mechanism, and including casing, surface cooler is arranged in casing；First pressure difference switch, is arranged at surface cooler both sides, to monitor the real-time pressure reduction in surface cooler both sides；Electromagnetic valve, is arranged on the refrigerant pipeline of surface cooler, to regulate cold medium flux；Blower fan, is arranged at surface cooler side, with gas drive freezer room when opening in by return air inlet entrance casing and by air outlet return freezer room；Controller, is connected with the first pressure difference switch, electromagnetic valve, the blower fan signal of telecommunication, with when the real-time pressure reduction of the first pressure difference switch monitoring is more than or equal to the first preset value, controls electromagnetic valve and blocks the refrigerant pipeline of surface cooler, and control blower fan unlatching.When this utility model makees defrosting process, in using freezer room, gas dissolves frost as relative thermal source, will not increase extra heat load, the advantage with efficient energy-saving, meanwhile, air-conditioning equipment control between cooling condition and defrosting operating condition and the more smoothly facility of conversion.
Description
Technical field
This utility model relates to air conditioning system technical field, is specifically related to the defrosting of a kind of airhandling equipment surface cooler surface
Mechanism.
Background technology
When air conditioning system is in summer condition, airhandling equipment enters one refrigeration, wet down regime mode, and this is air-conditioning
One of principal character that systemic-function is run.
When airhandling equipment is in refrigeration cool-down, wet down work process, limited (logical by equipment chilled water inlet temperature
In the case of Chang, the solidification freezing point temperature of water is 0 ° of C, and in order to make chilled water have good mobility, it is cold that air-conditioning equipment is applied
Freezing water inlet end temperature is 7 ° of about C).The wind pushing temperature of the processed air corresponding with this chilled water temperature is usually: 12 °
C～16 ° of C.
The incidental frosting during air cooling-down, wet down of the humiture parameter of above-mentioned processed air, icing work
Condition point has certain gap, and therefore, (space that between fin and fin, gap is constituted is referred to as effectively circulating surface cooler exposed surface
Sectional area) frost usually can be prevented effectively from.
But, for similar applications it is: the special air-conditioning system of the freezer class Application in Building of the article such as chilled vegetables, fruit
System, owing to freezer room Temperature and Relative Humidity of Indoor Air requires usually: temperature: 5 ° of C～7 ° of C；Relative humidity 70%～80%.
In order to ensure that freezer can the most normally work, the corresponding flow of cooled air humiture sent in storehouse should be: 1 °～
3 ° of C, relative humidity: about 95% (to overcome building enclosure load to remain normal requirements of one's work).With this air-flow of blowing
The corresponding chilled water of temperature requirement is because of the freezing point already close to water, so being also required to be revised as: by the mixing of ethylene glycol Yu water
Liquid (hereinafter referred to as coolant) substitutes chilled water, and it enters airhandling equipment refrigerant temperature and is usually-5 ° of about C, and coolant is corresponding
Freezing point temperature is-13 ° of about C.
Enter the air of air-conditioning equipment being lowered the temperature, during dehumidification treatments with gas flow temperature close to frosting, icing operating mode
The degree of point (temperature of the air that is i.e. processed close to 0 ° of C, relative humidity close to 100%) is the nearest, at the effective flow area of surface cooler
Between the most easily produce condensation frosting, icing phenomenon.Further, this condensation frost is often by some structure dead angle
Take the lead in occurring, the most progressively expand；Develop into a certain degree to make surface cooler valid circulation area reduce, block the most completely
And make airhandling equipment normally to work.
Therefore, take certain method to make defrosting process and be also to ensure that this type of air handling equipment can normally work and improve energy
One of basic technique problems of source utilization ratio.
Engineering Projects is applied to the defrosting way of airhandling equipment in cold storage air conditioning system usually at present:
1) take Special electrical heating device that the heating of surface cooler exposed surface is made defrost to process；
2) bypass line is set at surface cooler cold water in-out end connector, when needs defrost, uses bypass hot water heating
Surface cooler inner surface, then transfers heat to exposed surface and completes defrosting.
Obviously, above-mentioned two kinds of methods the most inevitably will be provided by electrical heating (or hot water) in its work process
Heat (load) enters in cold storage chamber with air-supply air-flow, this extra heat load in objectively adding freezer room.
Utility model content
The purpose of this utility model is to provide a kind of airhandling equipment surface cooler surface defrosting mechanism.
For realizing above-mentioned utility model purpose, this utility model adopts the following technical scheme that
A kind of airhandling equipment surface cooler surface defrosting mechanism, including casing, described casing is surrounded shape by some plate bodys
Becoming, and define receiving space, described casing is respectively provided on two sides with return air inlet and air outlet, described return air inlet and described air outlet
By described box house receiving space and environmental communication in freezer room；
Described surface cooler is arranged in the receiving space limited by described casing；
First pressure difference switch, is arranged at described surface cooler both sides, to monitor the real-time pressure reduction of described surface cooler both sides；
Electromagnetic valve, is arranged on the refrigerant pipeline of described surface cooler, to regulate cold medium flux；
Blower fan, is arranged at described surface cooler side, enters by described return air inlet with gas in driving freezer room when opening
Return in freezer room in described casing and by described air outlet；
Controller, is connected with described first pressure difference switch, electromagnetic valve, the blower fan signal of telecommunication, to monitor at the first pressure difference switch
Real-time pressure reduction more than or equal to the first preset value time, control described electromagnetic valve and block the refrigerant pipeline of described surface cooler, and control
Make described blower fan to open.
The technical scheme improved further as this utility model, described blower fan includes converter, to open at the first pressure reduction
The real-time pressure reduction closing monitoring is more than or equal to during the first preset value make rotation speed of fan increase.
The technical scheme improved further as this utility model, also includes temperature sensor, is arranged at described return air inlet
Place, is used for monitoring return air temperature；
Air returning valve, is arranged at described return air inlet, is used for regulating return air air quantity.
The technical scheme improved further as this utility model, between described surface cooler two adjacent fins, spacing is 4-6
Millimeter.
The technical scheme improved further as this utility model, described plate body is by the metal level inside and outside being positioned at and position
Formed in thermal insulation layer superposition between metal level described in both sides.
The technical scheme improved further as this utility model, described metal level by made by galvanized sheet or color steel,
Described thermal insulation layer is by made by polyurethane material.
Relative to prior art, of the present utility model have the technical effect that
When this utility model makees defrosting process, in using freezer room, gas dissolves frost, Bu Huizeng as relative thermal source
Adding extra heat load, the advantage with efficient energy-saving, simultaneously as in freezer room, temperature does not has excessive ripple when defrosting processes
Dynamic, air-conditioning equipment control between cooling condition and defrosting operating condition and the more smoothly facility of conversion.
Accompanying drawing explanation
Fig. 1 is the structural representation of air-treatment equipment list cooler surface defrosting mechanism in this utility model embodiment；
Fig. 2 is the structure at another visual angle of air-treatment equipment list cooler surface defrosting mechanism in this utility model embodiment
Schematic diagram；
Fig. 3 is the principle schematic of air-treatment equipment list cooler surface defrosting mechanism in this utility model embodiment.
Detailed description of the invention
Below with reference to detailed description of the invention shown in the drawings, this utility model is described in detail.But these embodiment party
Formula is not limiting as this utility model, structure that those of ordinary skill in the art is made according to these embodiments, method or
Conversion functionally is all contained in protection domain of the present utility model.
Embodiment
Seeing Fig. 1 to 3, a kind of airhandling equipment surface cooler surface defrosting mechanism 100, including casing 1, described casing 1
Being surrounded by some plate bodys and formed, and define receiving space, described casing 1 is respectively provided on two sides with return air inlet 11 and air outlet 12,
Described return air inlet 11 and described air outlet 12 are by described casing 1 inner accepting space and freezer room (not shown) interior environmental communication；
Described surface cooler 2 is arranged in the receiving space limited by described casing 1；
First pressure difference switch 22, is arranged at described surface cooler 2 both sides, to monitor the real-time pressure reduction of described surface cooler 2 both sides；
Electromagnetic valve 23, is arranged on the refrigerant pipeline 21 of described surface cooler 2, to regulate cold medium flux；
Blower fan 3, is arranged at described surface cooler 2 side, with gas in driving freezer room when opening by described return air inlet 11
In entering described casing 1 and returned in freezer room by described air outlet 12；
Controller 5, is connected with described first pressure difference switch 22, electromagnetic valve 23, blower fan 3 signal of telecommunication, to open at the first pressure reduction
When closing the 22 real-time pressure reduction monitored more than or equal to the first preset value, control described electromagnetic valve 23 and block the cold of described surface cooler 2
Matchmaker's pipeline 21, and control described blower fan 3 and open.
It should be noted that surface cooler 2(is also known as heat exchanger) it is the core dress carrying out heat exchange in airhandling equipment
Put.Surface cooler 2 is by refrigerant pipeline 21(copper material under normal circumstances), fin (aluminum alloy material), connecting line adnexa, table
Cooler frameworks (high-quality galvanized sheet material) etc. form.
When the coolant with lower temperature requires to flow successively through in refrigerant pipeline 21 according to design, there is higher temperature
Pending gas exposes after cold surface (refrigerant pipeline 21 and fin outer surface) contacts with surface cooler 2, the hydrone in gas with
Temperature-fall period and produce condensation, becoming condensed water discharges, and wherein, partial condensation water passes with fin low temperature at refrigerant pipeline 21
Leading under effect, produce condensation frosting and freeze and make the effective actual internal area between fin diminish, gas flows through the pressure of surface cooler 2
Difference rises, and when reaching defrosting warning pressure reduction working value (the first preset value), controller 5 controls described electromagnetic valve 23 and blocks institute
State the refrigerant pipeline 21(of surface cooler 2 to produce the low-temperature receiver of cold and disappear), and control described blower fan 3 and open, i.e. enter defrosting operating condition
Pattern.
Further, described blower fan 3 includes converter 31, with first pressure difference switch 22 monitoring real-time pressure reduction more than or
Blower fan 3 rotating speed is made to increase during equal to the first preset value.
Making blower fan 3 rotating speed increase by converter 31 in defrosting work process, (suck in freezer room returns air output
Wind) increase than the air output of normal refrigeration wet down work operating mode, to strengthen the heat exchange of gas and surface cooler 2 exposed surface, carry
High defrosting efficiency.
Airhandling equipment surface cooler surface defrosting mechanism 100 also includes temperature sensor 6, is arranged at described return air inlet 11
Place, is used for monitoring return air temperature；
Air returning valve 7, is arranged at described return air inlet 11, is used for regulating return air air quantity.
For being applied to the surface cooler 2 of Cold Air Conditioning System Combined with Low Temperature Air, it is contemplated that its work process necessarily leads to frosting existing
As, cause the valid circulation area of surface cooler 2 to reduce, therefore, between 2 liang of adjacent fins of the most described surface cooler
Spacing is preferably 4-6 millimeter, and above-mentioned spacing of fin can ensure that surface cooler 2 has bigger heat exchange area, simultaneously will not be because of wing
Sheet spacing is too small when causing frosting, and valid circulation area declines rapidly.
Casing 1 need to have good mechanical strength and heat-proof quality, inside and outside by being positioned at for the plate body constituting casing 1
The metal level of both sides and being formed in thermal insulation layer superposition between metal level described in both sides.
Concrete, the most described metal level is by made by galvanized sheet or color steel, and described thermal insulation layer is by gathering
Made by ammoniacum material.
Refer to Fig. 3, in casing 1, be additionally provided with filter 8, for filtering the particulate matter in gas；Second pressure difference switch 81,
It is arranged at described filter 8 both sides, to monitor the real-time pressure reduction of described filter 8 both sides, when pressure difference is more than the second preset value
Time, illustrate filter 8 has gathered too much particulate matter, with the filter 8 reminding user more to renew.
In Fig. 3, AI is the analog input port of controller 5, and DI is the On-off signal port of controller 5, and AO is for controlling
The analog output port of device 5, DO is the output switch parameter port of controller 5, can be drawn control by shown in the dotted line in Fig. 3
Device 5 and first pressure difference switch the 22, second pressure difference switch 81, electromagnetic valve 23, blower fan 3, temperature sensor 6, the concrete electricity of air returning valve 7
Signal annexation.
When this utility model makees defrosting process, in using freezer room, gas dissolves frost, Bu Huizeng as relative thermal source
Adding extra heat load, the advantage with efficient energy-saving, simultaneously as in freezer room, temperature does not has excessive ripple when defrosting processes
Dynamic, air-conditioning equipment control between cooling condition and defrosting operating condition and the more smoothly facility of conversion.
Last it is noted that embodiment of above is only in order to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail this utility model with reference to aforementioned embodiments, those of ordinary skill in the art should
Understand: the technical scheme described in aforementioned each embodiment still can be modified by it, or special to wherein portion of techniques
Levy and carry out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from each reality of this utility model
Execute the spirit and scope of mode technical scheme.
Claims (6)
1. an airhandling equipment surface cooler surface defrosting mechanism, it is characterised in that include casing, if described casing is by dry plate
Body surrounds formation, and defines receiving space, and described casing is respectively provided on two sides with return air inlet and air outlet, described return air inlet and institute
State air outlet by described box house receiving space and environmental communication in freezer room；
Described surface cooler is arranged in the receiving space limited by described casing；
First pressure difference switch, is arranged at described surface cooler both sides, to monitor the real-time pressure reduction of described surface cooler both sides；
Electromagnetic valve, is arranged on the refrigerant pipeline of described surface cooler, to regulate cold medium flux；
Blower fan, is arranged at described surface cooler side, is entered described by described return air inlet with gas drive freezer room when opening in
Return in freezer room in casing and by described air outlet；
Controller, is connected with described first pressure difference switch, electromagnetic valve, the blower fan signal of telecommunication, with the reality in the first pressure difference switch monitoring
Time pressure reduction more than or equal to the first preset value time, control described electromagnetic valve and block the refrigerant pipeline of described surface cooler, and control institute
State blower fan to open.
Airhandling equipment surface cooler surface the most according to claim 1 defrosting mechanism, it is characterised in that described blower fan bag
Include converter, to make rotation speed of fan rise when the real-time pressure reduction of the first pressure difference switch monitoring is more than or equal to the first preset value.
Airhandling equipment surface cooler surface the most according to claim 1 defrosting mechanism, it is characterised in that also include temperature
Sensor, is arranged at described return air inlet, is used for monitoring return air temperature；
Air returning valve, is arranged at described return air inlet, is used for regulating return air air quantity.
Airhandling equipment surface cooler surface the most according to claim 1 defrosting mechanism, it is characterised in that described surface cooler
Between two adjacent fins, spacing is 4-6 millimeter.
Airhandling equipment surface cooler surface the most according to claim 1 defrosting mechanism, it is characterised in that described plate body by
Metal level inside and outside and being formed in thermal insulation layer superposition between metal level described in both sides.
Airhandling equipment surface cooler surface the most according to claim 5 defrosting mechanism, it is characterised in that described metal level
Made by galvanized sheet or color steel, described thermal insulation layer is by made by polyurethane material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620765770.XU CN205825560U (en) | 2016-07-20 | 2016-07-20 | Airhandling equipment surface cooler surface defrosting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620765770.XU CN205825560U (en) | 2016-07-20 | 2016-07-20 | Airhandling equipment surface cooler surface defrosting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205825560U true CN205825560U (en) | 2016-12-21 |
Family
ID=57563615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620765770.XU Active CN205825560U (en) | 2016-07-20 | 2016-07-20 | Airhandling equipment surface cooler surface defrosting mechanism |
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| Country | Link |
|---|---|
| CN (1) | CN205825560U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906606A (en) * | 2018-09-17 | 2020-03-24 | 青岛海尔股份有限公司 | Air-cooled refrigerator |
-
2016
- 2016-07-20 CN CN201620765770.XU patent/CN205825560U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906606A (en) * | 2018-09-17 | 2020-03-24 | 青岛海尔股份有限公司 | Air-cooled refrigerator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |