CN207797444U - Folding type cooling system - Google Patents
Folding type cooling system Download PDFInfo
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- CN207797444U CN207797444U CN201721918694.2U CN201721918694U CN207797444U CN 207797444 U CN207797444 U CN 207797444U CN 201721918694 U CN201721918694 U CN 201721918694U CN 207797444 U CN207797444 U CN 207797444U
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Abstract
The utility model discloses a kind of folding type cooling system, including high-temperature level refrigeration circuit, low-temperature level refrigerating circuit and bypass circulation, the high-temperature level refrigeration circuit includes the high-temperature level compressor being sequentially connected end to end, condenser, the first expansion valve and condenser/evaporator；The low-temperature level refrigerating circuit includes end to end low-temperature level compressor, the condenser/evaporator, the second expansion valve and evaporator successively；One end of the bypass circulation is connected between the air entry and the condenser/evaporator of the high-temperature level compressor, the other end is connected between the condenser and first expansion valve, the bypass circulation is equipped with unloading solenoid valve, the unloading solenoid valve is configured to that the bypass circulation is connected when the pressure of inspiration(Pi) of the low-temperature level compressor is less than a predetermined value, to improve the pressure of inspiration(Pi) of low-temperature level compressor in low-temperature level refrigerating circuit, the oil return of low-temperature level compressor is effectively ensured, low-temperature level compressor operating reliability is improved, equipment overall failure rate reduces.
Description
Technical field
The utility model is related to refrigeration technology field, more particularly to a kind of folding type cooling system.
Background technology
Existing cascade refrigeration equipment is typically to carry out overlapping system by two groups of refrigerating circuits and using condenser/evaporator
Cold, when starting in high-temperature region at the beginning of equipment, the refrigerating capacity in high-temperature level refrigeration circuit can meet the refrigeration of low-temperature level refrigerating circuit
Agent condensation load, but when equipment is in low-temperature space since the condensation load of the refrigerant of low-temperature level refrigerating circuit decreases
And the opposite reduction of institute's chilling requirement, but in the case where the refrigerating capacity of low-temperature level refrigerating circuit cannot automatically adjust energy, continue
Low temperature can cause the refrigerant evaporating pressure of low-temperature level refrigerating circuit too low, and the oil return that just will appear low-temperature level compressor is difficult,
Causing to cause low-temperature level compressor oil starvation and damage compressor, evaporator inner refrigerant cannot effectively be exchanged heat with refrigerating medium,
It is reduced so as to cause the heat exchange efficiency of equipment.
Utility model content
The purpose of this utility model is that solving deficiency in the prior art at least to some extent, a kind of superposition type is provided
Refrigeration system.
To achieve the above object, folding type cooling system provided by the utility model, including high-temperature level refrigeration circuit, low temperature
Grade refrigerating circuit and bypass circulation, the high-temperature level refrigeration circuit include the high-temperature level compressor being sequentially connected end to end, condensation
Device, the first expansion valve and condenser/evaporator；The low-temperature level refrigerating circuit include successively end to end low-temperature level compressor,
The condenser/evaporator, the second expansion valve and evaporator；One end of the bypass circulation is connected to the high-temperature level compressor
Air entry and the condenser/evaporator between, the other end is connected between the condenser and first expansion valve, described
Bypass circulation is equipped with unloading solenoid valve, and the unloading solenoid valve is configured to when the pressure of inspiration(Pi) of the low-temperature level compressor is low
The bypass circulation is connected when a predetermined value, and disconnected when the pressure of inspiration(Pi) of the low-temperature level compressor is higher than the predetermined value
Open the bypass circulation.
Preferably, further include a pressure controller being connect with the unloading solenoid valve, the pressure controller is for examining
The pressure of inspiration(Pi) of the low-temperature level compressor is surveyed, and controls the conducting and disconnection of the unloading solenoid valve.
Preferably, the low-temperature level refrigerating circuit further includes having a low temperature precondenser, the system of the low temperature precondenser
Cryogen entrance is connect with the exhaust outlet of the low-temperature level compressor, refrigerant outlet and the condensation of the low temperature precondenser
Evaporator connects；And the low temperature precondenser is installed on one with the condenser, and share identical cooling water and changed
Heat.
Preferably, the low-temperature level refrigerating circuit further includes having an expansion vessel, and the entrance of the expansion vessel is connected to
Between the low temperature precondenser and condenser/evaporator, the outlet of the expansion vessel is connected to the evaporator and low-temperature level pressure
Between contracting machine.
Preferably, the high-temperature level refrigeration circuit further includes having the first device for drying and filtering, the first device for drying and filtering string
It is coupled between the condenser and the first expansion valve；The low-temperature level refrigerating circuit further includes having the second device for drying and filtering, described
Second device for drying and filtering is series between the condenser/evaporator and the second expansion valve.
Technical solutions of the utility model can be less than by the bypass circulation of setting in the pressure of inspiration(Pi) of low-temperature level compressor
When predetermined value, control unloading solenoid valve conduction, to make the refriger-ant section stream that condenser is exported in high-temperature level refrigeration circuit
Bypass circulation is crossed, i.e. some refrigerant in high-temperature level refrigeration circuit does not carry out heat release by condenser/evaporator, to improve low temperature
The pressure of inspiration(Pi) of low-temperature level compressor, is effectively ensured the oil return of low-temperature level compressor in grade refrigerating circuit, improves low-temperature level compression
Machine functional reliability, equipment overall failure rate reduce.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model folding type cooling system；
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation, be based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise " " axial direction ", " circumferential direction ", " radial direction " is orientation based on ... shown in the drawings
Or position relationship, be merely for convenience of describing the present invention and simplifying the description, do not indicate or imply the indicated device or
Element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as the limit to the utility model
System.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features are in direct contact, and can also not be to be in direct contact but lead to including the first and second features
Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only
Indicate that fisrt feature level height is less than second feature.
The folding type cooling system of the utility model embodiment is described in detail with reference to the accompanying drawings.
As shown in Figure 1, according to the folding type cooling system of the utility model embodiment, including high-temperature level refrigeration circuit 10,
Low-temperature level refrigerating circuit 20 and bypass circulation 30, wherein the high-temperature level refrigeration circuit 10 includes the height being sequentially connected end to end
Warm grade compressor 11, condenser 12, the first expansion valve 13 and condenser/evaporator 14；In this way, the high-temperature level refrigeration circuit 10
In refrigerant from high-temperature level compressor 11 discharge after by condenser 12 radiate condense, then pass through the first expansion valve 13 throttle
Expansion, then flows through evaporation endothermic in condenser/evaporator 14, finally flows back in high-temperature level compressor 11 to be compressed and be followed with being formed
Ring.
The low-temperature level refrigerating circuit 20 includes end to end low-temperature level compressor 21, the condenser/evaporator successively
14, the second expansion valve 23 and evaporator 24；In this way, refrigerant in low-temperature level refrigerating circuit 20 is from 21 row of low-temperature level compressor
Heat exchange and condensation of radiating are carried out with the refrigerant in high-temperature level refrigeration circuit 10 by condenser/evaporator 14 after going out, is then passed through
Second expansion valve, 23 throttling expansion, then flows through evaporation endothermic in evaporator 24, finally flows back in low-temperature level compressor 21 and carries out
Compression is to form cycle.
One end of the bypass circulation 30 is connected to the air entry of the high-temperature level compressor 11 and the condenser/evaporator
Between 14, the other end is connected between the condenser 12 and first expansion valve 13, and the bypass circulation 30 is equipped with and unloads
Solenoid valve 31 is carried, the unloading solenoid valve 31 is configured to be less than a predetermined value when the pressure of inspiration(Pi) of the low-temperature level compressor 21
When be connected the bypass circulation 30, and described in disconnecting when the pressure of inspiration(Pi) of the low-temperature level compressor 21 is higher than the predetermined value
Bypass circulation 30.
According to the folding type cooling system of the present embodiment, in pressure of inspiration(Pi) (the i.e. evaporator 24 when low-temperature level compressor 21
Evaporating pressure) be less than predetermined value when, by control unload solenoid valve 31 be connected, to make to be condensed in high-temperature level refrigeration circuit 10
The refriger-ant section that device 12 is exported flows through bypass circulation 30, i.e., the obstructed supercooling of some refrigerant in high-temperature level refrigeration circuit 10
Solidifying evaporator 14 carries out heat release and is effectively ensured with improving the pressure of inspiration(Pi) of low-temperature level compressor 21 in low-temperature level refrigerating circuit 20
The oil return of low-temperature level compressor 21 improves 21 functional reliability of low-temperature level compressor；When the pressure of inspiration(Pi) of low-temperature level compressor 21
It after reaching predetermined value, then controls unloading solenoid valve 31 and disconnects, so that the refrigerant that condenser 12 is discharged all flows through condensation and steams
Device 14 is sent out, refrigeration system continues to work normally at this time.
Further, further include a pressure controller 32 being connect with the unloading solenoid valve 31, the pressure controller
32 pressure of inspiration(Pi) for detecting the low-temperature level compressor 21, and control the conducting and disconnection of the unloading solenoid valve 31.
That is when the pressure of inspiration(Pi) of the low-temperature level compressor 21 detected by the pressure controller 32 is less than predetermined value, control unloading electricity
Magnet valve 31 is connected；When the pressure of inspiration(Pi) of the low-temperature level compressor 21 detected by the pressure controller 32 is greater than or equal to predetermined value,
Control unloading solenoid valve 31 disconnects.
In one embodiment of the utility model, the low-temperature level refrigerating circuit 20 further includes having a low temperature precondenser
22, the refrigerant inlet of the low temperature precondenser 22 is connect with the exhaust outlet of the low-temperature level compressor 21, and the low temperature is pre-
The refrigerant outlet of condenser 22 is connect with the condenser/evaporator 14；And the low temperature precondenser 22 and the condenser 12
It is installed on one, and shares identical cooling water and exchanges heat.That is, cooling-water duct and the low temperature precooling of condenser 12
The cooling-water duct of condenser 22 is connection, and cooling water is entering refrigerant progress of the condenser 12 with high-temperature level refrigeration circuit 10
While heat exchange, also enters the refrigerant in low temperature precondenser 22 with low-temperature level refrigerating circuit 20 and carry out heat exchange precooling, make knot
Structure is compacter rationally, and the radiating efficiency of refrigerant in low-temperature level refrigerating circuit 20 is improved by low temperature precondenser 22.
Further, the low-temperature level refrigerating circuit 20 further includes having an expansion vessel 26, the expansion vessel 26 to enter
Mouth is connected between the low temperature precondenser 22 and condenser/evaporator 14, and the outlet of the expansion vessel 26 is connected to the steaming
It sends out between device 24 and low-temperature level compressor 21.To which the refrigeration in low-temperature level refrigerating circuit 20 can be adjusted by expansion vessel 26
Dosage and shut down when automatically retract refrigerant.
In some embodiments of the utility model, the high-temperature level refrigeration circuit 10 further includes having the first device for drying and filtering
15, first device for drying and filtering 15 is series between the condenser 12 and the first expansion valve 13；What condenser 12 was exported
Refrigerant is after removal moisture therein is dried in the first device for drying and filtering 15, into throttling in the first expansion valve 13
Expansion.The low-temperature level refrigerating circuit 20 further includes having the second device for drying and filtering 25, and second device for drying and filtering 25 is series at
Between the condenser/evaporator 14 and the second expansion valve 23；The refrigerant of low-temperature level refrigerating circuit 20 is exported from condenser/evaporator 14
It is swollen into the second expansion valve 23 throttle afterwards after removal moisture therein is dried in the second device for drying and filtering 25
It is swollen.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (5)
1. a kind of folding type cooling system, which is characterized in that including high-temperature level refrigeration circuit, low-temperature level refrigerating circuit and bypass
Circuit, the high-temperature level refrigeration circuit include the high-temperature level compressor being sequentially connected end to end, condenser, the first expansion valve and cold
Solidifying evaporator；The low-temperature level refrigerating circuit includes end to end low-temperature level compressor, the condenser/evaporator, second successively
Expansion valve and evaporator；One end of the bypass circulation is connected to the air entry of the high-temperature level compressor and the condensation is steamed
Between sending out device, the other end is connected between the condenser and first expansion valve, and the bypass circulation is equipped with unloading electricity
Magnet valve, the unloading solenoid valve are configured to when the pressure of inspiration(Pi) of the low-temperature level compressor is less than a predetermined value described in conducting
Bypass circulation, and disconnect the bypass circulation when the pressure of inspiration(Pi) of the low-temperature level compressor is higher than the predetermined value.
2. folding type cooling system as described in claim 1, which is characterized in that further include one being connect with the unloading solenoid valve
Pressure controller, the pressure controller is used to detect the pressure of inspiration(Pi) of the low-temperature level compressor, and controls the unloading
The conducting and disconnection of solenoid valve.
3. folding type cooling system as described in claim 1, which is characterized in that the low-temperature level refrigerating circuit further includes having one
Low temperature precondenser, the refrigerant inlet of the low temperature precondenser is connect with the exhaust outlet of the low-temperature level compressor, described
The refrigerant outlet of low temperature precondenser is connect with the condenser/evaporator；And the low temperature precondenser is pacified with the condenser
Loaded on one, and shares identical cooling water and exchange heat.
4. folding type cooling system as claimed in claim 3, which is characterized in that the low-temperature level refrigerating circuit further includes having one
The entrance of expansion vessel, the expansion vessel is connected between the low temperature precondenser and condenser/evaporator, the expansion capacity
The outlet of device is connected between the evaporator and low-temperature level compressor.
5. folding type cooling system as described in claim 1, which is characterized in that the high-temperature level refrigeration circuit further includes having
One device for drying and filtering, first device for drying and filtering are series between the condenser and the first expansion valve；The low-temperature level system
Cold loop further includes having the second device for drying and filtering, and second device for drying and filtering is series at the condenser/evaporator and the second expansion
Between valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721918694.2U CN207797444U (en) | 2017-12-29 | 2017-12-29 | Folding type cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721918694.2U CN207797444U (en) | 2017-12-29 | 2017-12-29 | Folding type cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207797444U true CN207797444U (en) | 2018-08-31 |
Family
ID=63278177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721918694.2U Expired - Fee Related CN207797444U (en) | 2017-12-29 | 2017-12-29 | Folding type cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207797444U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664455A (en) * | 2019-10-15 | 2021-04-16 | 广东芬尼克兹节能设备有限公司 | Lubrication adjusting method and device for compressor, electronic equipment and storage medium |
| CN112984850A (en) * | 2021-03-23 | 2021-06-18 | 上海理工大学 | Energy-saving high-low temperature environment test box refrigerating system |
-
2017
- 2017-12-29 CN CN201721918694.2U patent/CN207797444U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664455A (en) * | 2019-10-15 | 2021-04-16 | 广东芬尼克兹节能设备有限公司 | Lubrication adjusting method and device for compressor, electronic equipment and storage medium |
| WO2021072954A1 (en) * | 2019-10-15 | 2021-04-22 | 广东芬尼克兹节能设备有限公司 | Compressor lubrication adjusting method and device, electronic equipment, and storage medium |
| CN112664455B (en) * | 2019-10-15 | 2023-02-21 | 广东芬尼克兹节能设备有限公司 | Lubrication adjusting method and device for compressor, electronic equipment and storage medium |
| CN112984850A (en) * | 2021-03-23 | 2021-06-18 | 上海理工大学 | Energy-saving high-low temperature environment test box refrigerating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180831 Termination date: 20211229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |