CN206281265U - One kind freezing unit and its compressor pressure control device - Google Patents
One kind freezing unit and its compressor pressure control device Download PDFInfo
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- CN206281265U CN206281265U CN201621176882.8U CN201621176882U CN206281265U CN 206281265 U CN206281265 U CN 206281265U CN 201621176882 U CN201621176882 U CN 201621176882U CN 206281265 U CN206281265 U CN 206281265U
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Abstract
This application discloses one kind freezing unit and its compressor pressure control device, compressor pressure control device includes：The high pressure sensor on the exhaust lateral line of compressor is arranged at, the pressure for detecting exhaust lateral line；The bypass line of the exhaust lateral line of connection compressor and the air inlet lateral line of compressor；It is arranged at the magnetic valve on bypass line；High pressure comparator, its input is connected with high pressure sensor, the output end of high pressure comparator is connected with magnetic valve, high pressure comparator is set with hot environment pressure limit, exhaust side loine pressure for being detected with high pressure sensor is compared, when exhaust side loine pressure is higher than hot environment pressure limit, triggering magnetic valve is opened, by the exhaust lateral line of compressor and air inlet side pipeline connection, realize compressor high side to low side release, so that high-pressure side is not over pressure limit, it is not easy the situation for compressor shutdown protection occur, ensure that the normal operation of freezing unit.
Description
Technical field
The utility model is related to refrigeration technology field, more particularly to a kind of tonifying Qi relief arrangement for freezing unit.Further relate to
A kind of freezing unit comprising the compressor pressure control device.
Background technology
Under traditional freezing unit environment higher in inner and outer ring Wen Jun or relatively low during refrigerating operaton, it is impossible to normal operation
Or continuously run, temperature range of operation is smaller, be freezed within can only being typically 43 DEG C in outer environment temperature, beyond this temperature
During scope, freezing unit can carry out high voltage protective because of the exhaust end hypertonia of compressor, compressor shutdown；Minimum ring temperature
Can only be more than -15 DEG C, during beyond this temperature range, freezing unit will be carried out because of the inlet end hypotony of compressor
Low-voltage variation, compressor shutdown.In addition, when freezing unit is under severe environmental conditions, the outer machine of unit is such as freezed
Installation site narrow space, or air pollution, when seriously causing to be blocked by dirty material in condenser, these factors can all make freezing
Unit is bad because ventilation does not exchange heat freely, even if freezing unit is under the normal work ring temperature, freezes unit as compressor
Exhaust end hypertonia and carry out high voltage protective, compressor shutdown.
Therefore, when the ring temperature of unit is freezed beyond the smaller range of normal work ring temperature or when running into adverse circumstances, all
Cannot normally run.
In sum, freezing unit how is solved in refrigeration because compressor pressure is easily sent out beyond normal range of operation
Raw stoppage protection, causes to freeze the problem that unit is not normally functioning, and becomes those skilled in the art's problem demanding prompt solution.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of compressor pressure control device, to control compressor
Pressure reduces compressor shutdown protection without departing from normal pressure working range, it is ensured that freezing unit normally runs.
Another purpose of the present utility model is to provide the freezing unit comprising the compressor pressure control device, to subtract
Few compressor shutdown protection, it is ensured that freezing unit normally runs.
To reach above-mentioned purpose, the utility model provides following technical scheme：
A kind of compressor pressure control device, including：
The high pressure sensor on the exhaust lateral line of compressor is arranged at, the pressure for detecting the exhaust lateral line；
Connect the bypass line of the air inlet lateral line of the exhaust lateral line and the compressor of the compressor；
It is arranged at the magnetic valve on the bypass line；
High pressure comparator, its input is connected with the high pressure sensor, the output end of the high pressure comparator with it is described
Magnetic valve is connected, the high pressure comparator is set with hot environment pressure limit, for being detected with the high pressure sensor
Exhaust side loine pressure is compared, and when the exhaust side loine pressure is higher than the hot environment pressure limit, triggers institute
State magnetic valve unlatching.
Preferably, in above-mentioned compressor pressure control device, also include：
The low pressure sensor on the air inlet lateral line of the compressor is arranged at, the pressure for detecting the air inlet lateral line
Power；
Low voltage comparator, its input is connected with the low pressure sensor, the output end of the low voltage comparator with it is described
Magnetic valve is connected, the low voltage comparator is set with low temperature environment pressure limit, for being detected with the low pressure sensor
Air inlet side loine pressure is compared, and when the air inlet side loine pressure is less than the low temperature environment pressure limit, triggers institute
State magnetic valve unlatching.
Preferably, in above-mentioned compressor pressure control device, also including be arranged on the bypass line first
Throttle part.
Preferably, in above-mentioned compressor pressure control device, the first throttle part is capillary or choke valve.
The utility model additionally provides a kind of freezing unit, including compressor, also including the pressure as described in above-mentioned any one
Contracting machine pressure control device.
Preferably, it is described also including condenser, reservoir, evaporator and gas-liquid separator in above-mentioned freezing unit
The inlet communication of the exhaust outlet of compressor and the condenser, the inlet communication of the bypass line in the compressor with it is described
On pipeline between condenser, the high pressure sensor is located between the compressor and the import of the bypass line, described
The outlet of condenser is connected with reservoir, the import of the evaporator is connected with the reservoir, and the gas-liquid separator enters
Mouthful with the outlet of the evaporator, the outlet of the gas-liquid separator connects with the air inlet of the compressor, the side
The other end on siphunculus road is communicated on the pipeline between the gas-liquid separator and the compressor, and the low pressure sensor is located at
Between the outlet of the gas-liquid separator and the bypass line.
Preferably, in above-mentioned freezing unit, also including oil eliminator, the refrigerant import of the oil eliminator with it is described
The exhaust outlet connection of compressor, the inlet communication of the refrigerant exit of the oil eliminator and the condenser, and the oil are separated
Device is located between the import of the exhaust outlet and the bypass line of the compressor.
Preferably, in above-mentioned freezing unit, also including be arranged between the evaporator and the reservoir
Two throttle parts.
Preferably, in above-mentioned freezing unit, mutually isolated condensation segment and super cooled sect is provided with the condenser,
The import of the condensation segment is connected with the exhaust outlet of the compressor, and the outlet of the condensation segment connects with the import of the reservoir
It is logical, the inlet communication of the outlet of the reservoir and the super cooled sect, the outlet of the super cooled sect and second throttle part
Inlet communication.
Preferably, in above-mentioned freezing unit, also including device for drying and filtering, the device for drying and filtering is communicated in the mistake
Between cold section of outlet and the second throttle.
Compared with prior art, the beneficial effects of the utility model are：
Compressor pressure control device in the utility model, sets high pressure sensing on the exhaust lateral line of compressor
Device, by bypass line by the exhaust lateral line and air inlet side pipeline connection of compressor, sets magnetic valve, high pressure on bypass line
The input of comparator is connected with high pressure sensor, and the output end of high pressure comparator is connected with magnetic valve, is set in high pressure comparator
Surely there is hot environment pressure limit, during work, on the compressor air-discharging lateral line that high pressure comparator detects high pressure sensor
Pressure compare with the hot environment pressure limit in high pressure comparator, when exhaust side loine pressure be higher than hot environment pressure limit
During value, high pressure comparator triggering magnetic valve is opened, so as to by the exhaust lateral line of compressor and air inlet side pipeline connection, compressor
The high pressure refrigerant of lateral line is vented to compressor air inlet side tube runs, compressor high side to low side release is realized, so that
Make the high-pressure side of compressor not over pressure limit, it is not easy to the situation of compressor shutdown protection occur, it is ensured that refrigerator
The normal operation of group.
Freezing unit in the utility model employs the compressor pressure control device in the application, therefore, it is possible to subtract
The stoppage protection of small compressor, it is ensured that the normal operation of freezing unit.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing for providing.
A kind of attachment structure schematic diagram of freezing unit that Fig. 1 is provided for the utility model embodiment.
In Fig. 1,1 be compressor, 2 be high pressure sensor, 3 be oil eliminator, 4 be magnetic valve, 5 be first throttle portion
Part, 6 be bypass line, 7 be condenser, 8 be reservoir, 9 be device for drying and filtering, 10 be liquid-sighting glass, 11 be the second throttle part,
12 is evaporator, 13 is gas-liquid separator, 14 is low pressure sensor, 15 is check valve.
Specific embodiment
Core of the present utility model there is provided a kind of compressor pressure control device, and compressor pressure can be controlled not surpass
Go out normal pressure working range, reduce compressor shutdown protection, it is ensured that freezing unit normally runs.
The utility model additionally provides a kind of freezing unit comprising the compressor pressure control device, can reduce compression
Machine stoppage protection, it is ensured that freezing unit normally runs.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1 is refer to, the utility model embodiment provides a kind of compressor pressure control device, including high pressure sensor
2nd, magnetic valve 4, high pressure comparator and bypass line 6, wherein, high pressure sensor 2 is arranged on the exhaust lateral line of compressor 1,
Exhaust lateral line is high-pressure side, the pressure for detecting exhaust lateral line；Bypass line 6 connects the exhaust side pipe of compressor 1
Road and the air inlet lateral line of compressor 1, air inlet lateral line are low-pressure end；Magnetic valve 4 is arranged on bypass line 6, for controlling
The break-make of bypass line processed 6；The input of high pressure comparator is connected with high pressure sensor 2, output end and the electricity of high pressure comparator
Magnet valve 4 is connected, and hot environment pressure limit is set with high pressure comparator, for the exhaust side detected with high pressure sensor 2
Loine pressure is compared, and when exhaust side loine pressure is higher than hot environment pressure limit, triggering magnetic valve 4 is opened, so that
By the exhaust lateral line of compressor 1 and air inlet side pipeline connection, will high-pressure side connected with low-pressure end, refrigerant is from high-pressure side flow direction
Low-pressure end, release is carried out to high-pressure side, makes the high-pressure side of compressor 1 not over the peak of service pressure, therefore, no
Easily trigger the high pressure stoppage protection of compressor 1, compressor 1 can be made continuously to be run in the range of service pressure.
Additionally, the compressor pressure control device in above-described embodiment can also meet freezing unit in harsh environments
In normal operation requirement, such as installation site narrow space of the outer machine of freezing unit, or air pollution seriously causes condenser
Interior these factors can all make freezing unit bad because ventilation does not exchange heat freely when being blocked by dirty material, even if freezing unit is normal
Under building ring temperature, freezing unit passes through to set compressor pressure control dress as the exhaust end hypertonia of compressor
Put, the pressure to the exhaust end of compressor 1 carries out off-load treatment, so as to avoid the generation of the high pressure stoppage protection of compressor 1, protect
The normal continuous operation of compressor 1 is demonstrate,proved.
Compressor pressure control device is further optimized, in the present embodiment, compressor pressure control device also includes
Low pressure sensor 14 and low voltage comparator；Wherein, low pressure sensor 14 is arranged on the air inlet lateral line of compressor 1, for examining
Survey the pressure of air inlet lateral line；The input of low voltage comparator is connected with low pressure sensor 14, the output end of low voltage comparator with
Magnetic valve 4 is connected, and low temperature environment pressure limit is set with low voltage comparator, for the air inlet detected with low pressure sensor 14
Lateral line pressure is compared, and when air inlet side loine pressure is less than low temperature environment pressure limit, triggering magnetic valve 4 is opened, from
And by the exhaust lateral line of compressor 1 and air inlet side pipeline connection, will high-pressure side connected with low-pressure end, refrigerant is from high-pressure side stream
To low-pressure end, ftercompction is carried out to low-pressure end, the low-pressure end of compressor 1 is not less than the minimum of service pressure, therefore
It is not easy to trigger the protection of the low voltage closing of compressor 1, compressor 1 can be made continuously to be run in the range of service pressure.
Further, in being the present embodiment, compressor pressure control device also includes be arranged on bypass line 6 the
One throttle part 5.First throttle part 5 is specifically as follows capillary or choke valve, choke valve can using heating power expansion valve or
Electric expansion valve.First throttle part 5 is used to carry out reducing pressure by regulating flow treatment to the refrigerant for flowing to low-pressure end from high-pressure side, to buffer
Too high pressure is passed through the air inlet side of compressor 1, protects compressor 1.
The utility model embodiment additionally provides a kind of freezing unit, including compressor 1, condenser 7, reservoir 8, evaporation
Device 12 and gas-liquid separator 13, also including the compressor pressure control device as described by all of the above embodiment.Wherein, compress
The exhaust outlet of machine 1 and the inlet communication of condenser 7, the pipe of the inlet communication of bypass line 6 between compressor 1 and condenser 7
Lu Shang, high pressure sensor 2 is located between compressor 1 and the import of bypass line 6, and the outlet of condenser 7 is connected with reservoir 8,
The import of evaporator 12 is connected with reservoir 8, the import of gas-liquid separator 13 and the outlet of evaporator 12, gas-liquid separator
13 outlet is connected with the air inlet of compressor 1, and the outlet of bypass line 6 is between gas-liquid separator 13 and compressor 1
Pipeline on, low pressure sensor 14 be located between gas-liquid separator 13 and the outlet of bypass line 6.During work, refrigerant is passed through successively
Compressor 1 is eventually returned to after overcompression machine 1, condenser 7, reservoir 8, evaporator 12, gas-liquid condenser 13, refrigeration is completed and is followed
Ring.
During work, if freezing unit be in hot environment under, refrigerant through compressor 1 exhaust outlet out after, be high pressure
Refrigerant, detects the pressure of high-pressure side by high pressure sensor 2, and high pressure comparator is by the pressure of high-pressure side and hot environment pressure limit
Value is compared, if the pressure of high-pressure side is higher than hot environment pressure limit, high pressure comparator triggering magnetic valve 4 is opened, will
The pressure of high-pressure side is unloaded and is depressed into low-pressure end, it is to avoid the high voltage protective of compressor 1 occur.If freezing unit is under low temperature environment,
Low pressure sensor 14 detects to the pressure on the air inlet lateral line of compressor 1, low voltage comparator by the pressure of low-pressure end with it is low
Warm environmental pressure limit value is compared, if the pressure of low-pressure end is less than low temperature environment pressure limit, low voltage comparator triggering electricity
Magnet valve 4 is opened, and the pressure of high-pressure side is filled into low-pressure end, it is to avoid the low-voltage variation of compressor 1 occur.So as to ensure that freezing unit exists
Continuously run in normally-pressured neighbor.
As shown in figure 1, in the present embodiment, freezing unit also includes oil eliminator 3, the refrigerant import of oil eliminator 3 with
The exhaust outlet connection of compressor 1, the refrigerant exit of oil eliminator 3 and the inlet communication of condenser 7, and oil eliminator 3 is located at pressure
Between the import of the exhaust outlet and bypass line 6 of contracting machine 1, the lubricating oil outlet of oil eliminator 3 is connected with compressor 1.Oil is separated
The compressor lubricant oil that device 3 is used to be mixed into refrigerant is separated, and is added to again in compressor 1, is continuing with.
In the present embodiment, freezing unit also includes the second throttle part being arranged between evaporator 12 and reservoir 8
11, the second throttle part 11 is used to be depressured to entering the refrigerant in evaporator 12, is convenient for evaporation operation.
In order to improve the stability of the pressure in freezing unit, it is ensured that the refrigerant entered before the second throttle part 11 is pure
Liquid refrigerants, is provided with mutually isolated condensation segment and super cooled sect, import and the pressure of condensation segment in the condenser 7 in the present embodiment
The exhaust outlet connection of contracting machine 1, the outlet of condensation segment and the inlet communication of reservoir 8, the outlet of reservoir 8 and the import of super cooled sect
Connection, the outlet of super cooled sect and the inlet communication of the second throttle part 11.During work, refrigerant enters from the condensation segment of condenser 7
Condenser 7, first carries out condensation operation, and refrigerant out enters in reservoir 8 from condenser 7 afterwards, and part refrigerant shwoot is steaming
Vapour, in order to improve the degree of supercooling of refrigerant, refrigerant from reservoir 8 out after, entered in condenser 7 by the import of super cooled sect,
Cold treatment was carried out to refrigerant, finally, supercooling refrigerant out enters in second throttle 11 from super cooled sect.So as to ensure that into
Enter the refrigerant before second throttle 11 for pure liquid refrigerants.
In the present embodiment, freezing unit also includes device for drying and filtering 9, and device for drying and filtering 9 is communicated in the outlet of super cooled sect
Between second throttle 11, for being dried filtering to refrigerant, it is ensured that refrigerant quality.
In the present embodiment, freezing unit also include be arranged between device for drying and filtering 9 and second throttle 11 regarding liquid
Mirror 10, whether the state for observing refrigerant is liquid.
In the present embodiment, check valve 15 is additionally provided between the import of bypass line 6 and the import of condenser 7, is only allowed
Refrigerant flows to the side of condenser 7, prevents refrigerant return.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.Various modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where spirit or scope of the present utility model are not departed from.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
1. a kind of compressor pressure control device, it is characterised in that including：
The high pressure sensor (2) on the exhaust lateral line of compressor (1) is arranged at, the pressure for detecting the exhaust lateral line
Power；
Connect the bypass line (6) of the exhaust lateral line of the compressor (1) and the air inlet lateral line of the compressor (1)；
It is arranged at the magnetic valve (4) on the bypass line (6)；
High pressure comparator, its input is connected with the high pressure sensor (2), output end and the electricity of the high pressure comparator
Magnet valve (4) is connected, and the high pressure comparator is set with hot environment pressure limit, for being examined with the high pressure sensor (2)
The exhaust side loine pressure of survey is compared, and when the exhaust side loine pressure is higher than the hot environment pressure limit, touches
Send out magnetic valve (4) described and open.
2. compressor pressure control device according to claim 1, it is characterised in that also include：
The low pressure sensor (14) on the air inlet lateral line of the compressor (1) is arranged at, for detecting the air inlet lateral line
Pressure；
Low voltage comparator, its input is connected with the low pressure sensor (14), the output end of the low voltage comparator with it is described
Magnetic valve (4) is connected, and the low voltage comparator is set with low temperature environment pressure limit, for the low pressure sensor (14) institute
The air inlet side loine pressure of detection is compared, when the air inlet side loine pressure is less than the low temperature environment pressure limit,
Trigger the magnetic valve (4) unlatching.
3. compressor pressure control device according to claim 1 and 2, it is characterised in that also including being arranged at the side
First throttle part (5) on siphunculus road (6).
4. compressor pressure control device according to claim 3, it is characterised in that the first throttle part (5) is
Capillary or choke valve.
5. a kind of freezing unit, including compressor, it is characterised in that also including the compression as described in claim any one of 1-4
Machine pressure control device.
6. freezing unit according to claim 5, it is characterised in that also including condenser (7), reservoir (8), evaporator
And gas-liquid separator (13), the exhaust outlet of the compressor (1) and the inlet communication of the condenser (7), the bypass (12)
The inlet communication of pipeline (6) is on the pipeline between the compressor (1) and the condenser (7), the high pressure sensor (2)
Between import positioned at the compressor (1) with the bypass line (6), the outlet of the condenser (7) is with reservoir (8) even
Logical, the import of the evaporator (12) is connected with the reservoir (8), the import and the evaporation of the gas-liquid separator (13)
The outlet of device (12), the outlet of the gas-liquid separator (13) is connected with the air inlet of the compressor (1), the bypass
On pipeline between the gas-liquid separator (13) and the compressor (1), the low pressure is sensed the outlet of pipeline (6)
Device (14) is between the outlet of the gas-liquid separator (13) and the bypass line (6).
7. freezing unit according to claim 6, it is characterised in that also including oil eliminator (3), the oil eliminator
(3) refrigerant import is connected with the exhaust outlet of the compressor (1), the refrigerant exit of the oil eliminator (3) and the condensation
The inlet communication of device (7), and the oil eliminator (3) is positioned at the exhaust outlet and the bypass line (6) of the compressor (1)
Between import.
8. freezing unit according to claim 6, it is characterised in that also including be arranged at the evaporator (12) with it is described
The second throttle part (11) between reservoir (8).
9. freezing unit according to claim 8, it is characterised in that be provided with the condenser (7) mutually isolated
Condensation segment and super cooled sect, the import of the condensation segment are connected with the exhaust outlet of the compressor (1), the outlet of the condensation segment with
The inlet communication of the reservoir (8), the outlet of the reservoir (8) and the inlet communication of the super cooled sect, the super cooled sect
Outlet and second throttle part (11) inlet communication.
10. freezing unit according to claim 9, it is characterised in that described dried also including device for drying and filtering (9)
Filter (9) is communicated between the outlet of the super cooled sect and the second throttle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176882.8U CN206281265U (en) | 2016-10-26 | 2016-10-26 | One kind freezing unit and its compressor pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176882.8U CN206281265U (en) | 2016-10-26 | 2016-10-26 | One kind freezing unit and its compressor pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281265U true CN206281265U (en) | 2017-06-27 |
Family
ID=59083987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621176882.8U Active CN206281265U (en) | 2016-10-26 | 2016-10-26 | One kind freezing unit and its compressor pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206281265U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115823759A (en) * | 2022-11-25 | 2023-03-21 | 珠海格力电器股份有限公司 | Compression refrigeration system and control method |
| CN117469871A (en) * | 2023-12-26 | 2024-01-30 | 珠海格力电器股份有限公司 | Control method and device of refrigeration system, refrigeration system and storage medium |
-
2016
- 2016-10-26 CN CN201621176882.8U patent/CN206281265U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115823759A (en) * | 2022-11-25 | 2023-03-21 | 珠海格力电器股份有限公司 | Compression refrigeration system and control method |
| CN117469871A (en) * | 2023-12-26 | 2024-01-30 | 珠海格力电器股份有限公司 | Control method and device of refrigeration system, refrigeration system and storage medium |
| CN117469871B (en) * | 2023-12-26 | 2024-04-05 | 珠海格力电器股份有限公司 | Control method and device of refrigeration system, refrigeration system and storage medium |
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