CN100451500C - Minitype constant temperature chiller - Google Patents
Minitype constant temperature chiller Download PDFInfo
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- CN100451500C CN100451500C CNB2005101176882A CN200510117688A CN100451500C CN 100451500 C CN100451500 C CN 100451500C CN B2005101176882 A CNB2005101176882 A CN B2005101176882A CN 200510117688 A CN200510117688 A CN 200510117688A CN 100451500 C CN100451500 C CN 100451500C
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- constant temperature
- minitype
- pipeline
- chiller
- evaporimeter
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Abstract
A small scale constant temperature freezer is made of frequency changing refrigerating system, second coolant circulation system, temperature compensation and defroster control mechanism, to maintain the constant temperature of the load body, the merit of the frequency changing freezer, meeting the requirement of temperature control precision of the constant temperature freezing system, solving defrosting problem, and arriving the goal of small scale constant temperature control with mutual cooperation.
Description
Technical field
The invention relates to a kind of constant temperature chiller, be applied to as freezing with insulating box, processing procedure refrigerator, thermostatic control instrument, particularly a kind of have thermostatic control, frequency conversion freezing, and can solve the minitype constant temperature chiller of defrosting problem.
Background technology
Common fridge-freezer comprises household electric refrigerator, commercial show cabinet, experiment climatic chamber, cryogenic freezing case etc., at present in the majority in the mode of invariable frequency compressor coolant circulating system direc expansion refrigeration, family expenses and commercial most switch switching of carrying out compressor with temperature relay, at the condition and range that requires, its variation is usually above about ± 3 ℃ with holding temperature.The fridge-freezer of laboratory grade, then with the regular startup of compressor (always-on) mode operation, again with electric heating compensation make the load end temperature be controlled at ± 1 ℃ in, even reach ± 0.5 ℃.
Novel frequency conversion refrigerator can be adopted the compressor variable rotating speed and carry out temperature control, variation can maintain ± 1.5 ℃ in, this function for the family expenses freezing and refrigeration is enough, but the temperature control requirement for precision still has its weak point, and the advantage of the design of straight swollen system is that heat passes soon, and shortcoming then is that the temperature difference is big, another unavoidable shortcoming is in the defrost process, should adopt the outer electric heating defrosting of pipe, defrosting effect is poor, and the load end temperature is subject to disturb.
Preceding case such as United States Patent (USP) are announced patent No. 6694754, the patent of the household electric refrigerator defrost mechanism that proposes, on will be in the defrosting cycle, feedback the pulse wave (pulse) of regulating defrosting electric heating with evaporator temperature, too high with the temperature of avoiding evaporimeter, and reach province can purpose.And United States Patent (USP) is announced patent the 6th, 354, No. 093, according to parameters such as compressor operating time, evaporator coil temperature, door leaf opening times, converts the control function of defrosting electric heating to, to carry out optimization defrosting control.No. 2002162124 patent of Japan Patent with the temperature of the capillary of control valve for refrigerant flow and bypass control double evaporators, belongs to the freezing controlling organization of direct-expansion type single compressor double evaporators.
United States Patent (USP) announces the 6th, 094, No. 925, carry out the freezing mechanism patent of many groups load at single freezing main frame, if the heat energy of going up the condenser that utilizes refrigeration system carries out the framework of the hot liquid defrosting of evaporator coil, this shortcoming is the system cost height, and directly defrosts with high temperature refrigerant, freezing end temperature is too high, and causes moment thermal shock and damaging easily.
Summary of the invention
The object of the invention is to propose a kind of minitype constant temperature chiller, quotes the advantage of aforementioned frequency conversion refrigerator, and collocation constant temperature refrigeration system is to the demand of temperature control precision, and can solve the problem of defrosting, has the commodity value of instrument class freezing and refrigeration thermostat.
The disclosed minitype constant temperature chiller according to the present invention is to comprise frequency conversion refrigeration system, secondary refrigerant cycle system, thermostatic control system, and controls a load in temperature constant state.
The frequency conversion refrigeration system includes frequency-changeable compressor, condenser, expansion valve, the evaporimeter that is connected, by by the frequency-changeable compressor compression working fluid, and get back to frequency-changeable compressor by condenser, expansion valve and evaporimeter in regular turn, and can externally provide cold energy in evaporimeter; Make secondary refrigerant cycle system receive this cold energy, and this cold energy provided give load, cooperate the control of the thermostatic control system of contiguous secondary refrigerant cycle system simultaneously, make load reach constant temperature.
Simultaneously, thermostatic control system can provide thermostatic control and solve the defrosting problem; So by this design, the present invention possesses the advantage that the frequency conversion refrigerator is arranged, and possesses the demand of constant temperature refrigeration system to the temperature control precision simultaneously, and can solve the problem of defrosting.
Description of drawings
Fig. 1 is the schematic diagram for minitype constant temperature chiller of the present invention;
Fig. 2 A is the first embodiment schematic diagram for the thermostatic control system of minitype constant temperature chiller of the present invention;
Fig. 2 B is the second embodiment schematic diagram for the thermostatic control system of minitype constant temperature chiller of the present invention;
Fig. 3 is the circuit framework schematic diagram for the frequency-changeable compressor of minitype constant temperature chiller of the present invention;
Fig. 4 is the first embodiment schematic diagram that is applied to multi-load for the present invention; And
Fig. 5 is the second embodiment schematic diagram that is applied to multi-load for the present invention.
[upward wanting the element numbers explanation]
10 casings
11 heat-insulation layers
12 thermostatic box fans
13 air inlets
14 accommodation spaces
15 gas outlets
16 door leaves
17 door leaf liners
20 secondary refrigerant cycle systems
21 pumpings
22 triple valves
23 heat exchangers
24 pipelines
30 thermostatic control systems
31 solid-state relays
32 defrosting electric heating
33 thermostat temperatures compensation electric heating
34 change-over switches
35 temperature sensors
36 power supplys
40 frequency conversion refrigeration systems
41 frequency-changeable compressors
42 condensers
43 expansion valves
44 evaporimeters
47 condenser fans
48 water-cooling systems
51 frequency-variable controllers
52 voltage sensing circuits
53 power supply changeover devices
54 AC powers
70 loads
71 constant temperature and defrosting electric heating system
The specific embodiment
The disclosed minitype constant temperature chiller according to the present invention, be to be applied on the load, what claim on the scientific principle is control volume (control volumn), be that example is done an elaboration at first with casing 10, consult Fig. 1 clearly, include casing 10, secondary cryogen (secondary coolant) circulatory system 20, thermostatic control system 30 and frequency conversion refrigeration system 40, casing 10 inside have accommodation space 14, the outside is a heat-insulation layer 11, and having door leaf 16, seam crossing utilizes door leaf liner 17 to prevent that environment's heat from entering accommodation space 14.Secondary refrigerant cycle system 20 includes heat exchanger 23, pipeline 24, triple valve 22 and pumping 21; Frequency conversion refrigeration system 40 includes frequency-changeable compressor 41, fan 47, condenser 42, expansion valve 43 and evaporimeter 44.
At first, frequency-changeable compressor 41 is with working fluid (refrigerant) boil down to high-temperature high-pressure state, by assisting by fan 47 and continuing by condenser 42, expansion valve 43, and become the low-pressure low-temperature state, and in by evaporimeter 44 time, cold energy can be provided away, return at last and compress freeze cycle of formation in the frequency-changeable compressor 41, the evaporating temperature of its refrigerating capacity 200W～30kW, refrigerant is-40 a ℃～room temperature.And the circuit framework of frequency-changeable compressor 41, see also Fig. 3, see through controller 51, voltage sensing circuit 52 and electronic building brick such as diode in fact, to input to through the AC power 54 of interchanger (converter) 53 in the frequency-changeable compressor 41, reach the purpose of frequency conversion, certainly, this circuit framework instrument is a present common embodiment, the detailed circuit operation principles is not repeated, and be familiar with the personage of this technology can be easily with its displacement.
Continue referring again to Fig. 1, the cold energy that the evaporimeter 44 of frequency conversion refrigeration system 40 is provided, can provide secondary refrigerant cycle system 20 required cold energy, working fluid in its pipeline 24 is by after passing through evaporimeter 44 by the driving of pumping 21, advance to heat exchanger 23, and casing 10 sees through fan 12 forced convertions, make inner air leave accommodation space 14 and pass through heat exchanger 23 by gas outlet 15, and then enter in the accommodation space 14 by air inlet 13, give accommodation space 10 and cold energy provided.
In order to reach the constant temperature of accommodation space 14 temperature in the casing 10, in the pipeline 24 1 sides design of secondary refrigerant cycle system 20 thermostatic control system 30 is arranged, by to control its temperature.First embodiment of thermostatic control system 30, see also Fig. 2 A, include power supply 36, temperature sensor 35, solid-state relay 31, change-over switch 34, defrosting electric heating 32 and thermostat temperature compensation electric heating 33, mainly be by whether and enable position by the startup of temperature sensor 35, solid-state relay 31 control change-over switches 34, control 33 starts of thermostat temperature compensation electric heating, the pipeline 24 that provides heat energy to give secondary refrigerant cycle system 20 is to reach thermostatically controlled purpose.And then be when pipeline 24 has the frosting phenomenon, in order to eliminate its frosting phenomenon the startup opportunity of defrosting electric heating 33.And, can cooperate simultaneously the effect of triple valve 22, change the flow through ratio of evaporimeter 44 of pipeline 24 internal work fluids, and pumping 21 also be to be the pumping 21 of controllable flow amount, more the flow that changes working fluid be can cooperate, the constant temperature or the cooperation of defrosting reached.
On the other hand, seeing also Fig. 2 B, is second embodiment, can utilize single defrosting electric heating 32 to replace the design of original two electric heating, be used the control of solid-state relay 31, adjust the power of defrosting electric heating 32, equally also can reach the control of constant temperature and defrosting.
And the notion of the present invention design equally also can be applicable to the design of multi-load body 70, sees also Fig. 4, can several loads 70 in parallel, and each load 70 all includes a thermostatic control system 71, also can reach identical purpose.In addition, see also Fig. 5, fan 47 parts can utilize water-cooling system 48 to be replaced, and it can be provided by the Wu Shui of factory (facility water) of cooling tower or processing procedure.
Claims (10)
1, a kind of minitype constant temperature chiller is characterized in that, includes:
One load;
One frequency conversion refrigeration system, it includes a frequency-changeable compressor, a condenser, an expansion valve, an evaporimeter that is connected, described frequency conversion refrigeration system compresses a working fluid by described frequency-changeable compressor, and get back to described frequency-changeable compressor by described condenser, expansion valve and evaporimeter in regular turn, and externally provide cold energy by described evaporimeter;
One secondary refrigerant cycle system, it includes a heat exchanger, a pipeline and a secondary cryogen, this heat exchanger is installed in the described load, this pipeline connects the evaporimeter of described heat exchanger and described frequency conversion refrigeration system, and the cold energy that making this secondary cryogen can absorb this evaporimeter provides also provides this cold energy to described load;
One thermostatic control system is installed in pipeline one side of described secondary refrigerant cycle system, and controls the pipeline temperature of this secondary refrigerant cycle system, and then makes described load reach constant temperature; This thermostatic control system includes a defrosting electric heating, eliminates the pipeline frosting phenomenon because of the secondary refrigerant cycle system that low temperature produced of described secondary cryogen;
Described secondary refrigerant cycle system also includes a triple valve, when described defrosting electric heating action, changes the flow through ratio of described evaporimeter of secondary cryogen by this triple valve in the loop of the pipeline of secondary refrigerant cycle system.
2, minitype constant temperature chiller as claimed in claim 1 is characterized in that, the refrigerating capacity 200W～30kW of described frequency conversion refrigeration system.
3, minitype constant temperature chiller as claimed in claim 1 is characterized in that, the evaporating temperature of the working fluid of described frequency conversion refrigeration system is-40 degree～room temperatures.
4, minitype constant temperature chiller as claimed in claim 1 is characterized in that, is when pipeline has the frosting phenomenon startup opportunity of described defrosting electric heating, in order to eliminate the frosting phenomenon.
5, minitype constant temperature chiller as claimed in claim 1 is characterized in that, described thermostatic control system is to utilize thermostat temperature compensation electric heating, in order to control the temperature constant state of this load.
6, minitype constant temperature chiller as claimed in claim 5 is characterized in that, described thermostatic control system also includes one and switches a switch and a solid-state relay, in order to control this thermostat temperature compensation electric heating.
7, minitype constant temperature chiller as claimed in claim 1 is characterized in that, described load is a casing, and inside has an accommodation space.
8, minitype constant temperature chiller as claimed in claim 7 is characterized in that, described casing is a heat-insulation layer in this accommodation space outside.
9, minitype constant temperature chiller as claimed in claim 7 is characterized in that, described casing has a door leaf, and utilizes a door leaf liner to prevent that environment's heat from entering this accommodation space.
10, minitype constant temperature chiller as claimed in claim 7 is characterized in that, described casing utilizes a fan, makes the heat exchanger of the interior air circulation of this accommodation space by this secondary refrigerant cycle system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101176882A CN100451500C (en) | 2005-11-08 | 2005-11-08 | Minitype constant temperature chiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101176882A CN100451500C (en) | 2005-11-08 | 2005-11-08 | Minitype constant temperature chiller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1963348A CN1963348A (en) | 2007-05-16 |
| CN100451500C true CN100451500C (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101176882A Active CN100451500C (en) | 2005-11-08 | 2005-11-08 | Minitype constant temperature chiller |
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| CN (1) | CN100451500C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359742A (en) * | 2011-09-02 | 2012-02-22 | 合肥美的荣事达电冰箱有限公司 | Refrigerating box and refrigerating device with same |
| CN103234885B (en) * | 2013-04-08 | 2016-03-16 | 天津虹炎科技有限公司 | A kind of determination method for osmotic coefficient of plastic cut-off wall |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0513734A2 (en) * | 1991-05-13 | 1992-11-19 | WEISS UMWELTTECHNIK GmbH | Process for conditioning air in a closable space and testing arrangement |
| JPH0835738A (en) * | 1994-07-20 | 1996-02-06 | Sanyo Electric Co Ltd | Constant-temperature controller and constant-temperature controlling method |
| US5970729A (en) * | 1995-03-01 | 1999-10-26 | Sts Corporation | Cooling apparatus |
| CN2422663Y (en) * | 1999-10-28 | 2001-03-07 | 刘奇希 | Special temp controller for intelligent computer room |
| CN2533413Y (en) * | 2002-03-05 | 2003-01-29 | 刘汉阳 | Dustless power-saving constant-temp. humididstat for industry |
| CN1512125A (en) * | 2002-12-30 | 2004-07-14 | 财团法人工业技术研究院 | Wide temperature range constant temperature freezing system and its control method |
| CN1515860A (en) * | 2003-01-06 | 2004-07-28 | Smc株式会社 | Constant temp. liquid circulating device |
| CN1627009A (en) * | 2003-12-09 | 2005-06-15 | 松下电器产业株式会社 | Refrigerator |
| TW200521392A (en) * | 2003-12-30 | 2005-07-01 | Ind Tech Res Inst | Compound constant-temperature refrigeration system |
-
2005
- 2005-11-08 CN CNB2005101176882A patent/CN100451500C/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0513734A2 (en) * | 1991-05-13 | 1992-11-19 | WEISS UMWELTTECHNIK GmbH | Process for conditioning air in a closable space and testing arrangement |
| JPH0835738A (en) * | 1994-07-20 | 1996-02-06 | Sanyo Electric Co Ltd | Constant-temperature controller and constant-temperature controlling method |
| US5970729A (en) * | 1995-03-01 | 1999-10-26 | Sts Corporation | Cooling apparatus |
| CN2422663Y (en) * | 1999-10-28 | 2001-03-07 | 刘奇希 | Special temp controller for intelligent computer room |
| CN2533413Y (en) * | 2002-03-05 | 2003-01-29 | 刘汉阳 | Dustless power-saving constant-temp. humididstat for industry |
| CN1512125A (en) * | 2002-12-30 | 2004-07-14 | 财团法人工业技术研究院 | Wide temperature range constant temperature freezing system and its control method |
| CN1515860A (en) * | 2003-01-06 | 2004-07-28 | Smc株式会社 | Constant temp. liquid circulating device |
| CN1627009A (en) * | 2003-12-09 | 2005-06-15 | 松下电器产业株式会社 | Refrigerator |
| TW200521392A (en) * | 2003-12-30 | 2005-07-01 | Ind Tech Res Inst | Compound constant-temperature refrigeration system |
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| Publication number | Publication date |
|---|---|
| CN1963348A (en) | 2007-05-16 |
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