CN206146042U - Heat pump system and refrigerating unit - Google Patents
Heat pump system and refrigerating unit Download PDFInfo
- Publication number
- CN206146042U CN206146042U CN201621137792.8U CN201621137792U CN206146042U CN 206146042 U CN206146042 U CN 206146042U CN 201621137792 U CN201621137792 U CN 201621137792U CN 206146042 U CN206146042 U CN 206146042U
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- Prior art keywords
- compressor
- heat exchanger
- heat pump
- coolant
- refrigeration
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- 238000005057 refrigeration Methods 0.000 claims abstract description 30
- 239000002826 coolant Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims 2
- 239000003507 refrigerant Substances 0.000 abstract description 8
- 230000008676 import Effects 0.000 abstract description 2
- 239000006200 vaporizer Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model relates to a heat pump system and refrigerating unit, this heat pump system include compressor, outdoor heat exchanger, first throttling arrangement and indoor heat exchanger, compressor, outdoor heat exchanger, first throttling arrangement and indoor heat exchanger form refrigerant circulation system, still include the bypass pipeline, the both ends of bypass pipeline are connected respectively the import and the export of compressor, be provided with on the bypass pipeline and be used for opening and closing the first switching device of bypass pipeline. According to the utility model discloses a high low pressure is balanced before refrigeration cycle system can guarantee the compressor and open once more, has ensured normal start rate.
Description
Technical field
This utility model is related to a kind of heat pump and refrigeration unit, and more particularly to one kind can be avoided in kind of refrigeration cycle
Compressor flooded starts and the heat pump that cannot normally start of compressor and refrigeration unit.
Background technology
The kind of refrigeration cycle system for constituting is sequentially connected by compressor, condenser, main valve door gear, throttling arrangement and vaporizer
System is known, flows through to form kind of refrigeration cycle successively in above-mentioned part by making coolant.In this known kind of refrigeration cycle,
Compressor in order to ensure cooling cycle system in normal startup can stable operation, expect after compressor shutdown to machine
So that the pressure between compressor inlet and outlet reaches balance before group is again started up.Kind of refrigeration cycle most in the market
Unit is to realize what high-low pressure was balanced by the main valve door gear that is not related on closed loop stream when shutting down.However,
In the case that main valve door gear is not related to and closes, the high-pressure liquid coolant in condenser may flow to compressor, so as to cause
Compressor flooded starts.For this purpose, there are some units when shutting down, the main valve door gear on pipeline can be closed and by vaporizer
Coolant be pumped in the high pressure side condenser of kind of refrigeration cycle and fluid reservoir.In this case, when unit is again started up, beat
When opening main valve door gear, the high-low pressure difference between compressor inlet and outlet cannot at short notice reach balance, and then lead
Compressor start failure is caused, normal starting rate is low.
Utility model content
Main purpose of the present utility model is to provide a kind of heat pump and system that ensure that the normal startup of compressor
Cold group.
To achieve these goals, this utility model provides a kind of heat pump, including compressor, outdoor heat exchanger, the
One throttling arrangement and indoor heat exchanger, the compressor, outdoor heat exchanger, first throttle device and indoor heat exchanger are formed
Coolant circulating system, also including bypass line, the two ends of the bypass line connect respectively the inlet and outlet of the compressor,
The first switch device for opening and closing the bypass line is provided with the bypass line.
Alternatively, the second throttling device connected with the first switch device is additionally provided with the bypass line.
Alternatively, the second throttling device is capillary tube or choke valve.
Alternatively, second switch dress is provided with the connecting line between the outdoor heat exchanger and the indoor heat exchanger
Put.
Alternatively, the heat pump is single refrigeration system；
It is provided with the refrigeration entrance pipe of the outdoor heat exchanger and only allow coolant to outdoor heat exchanger refrigeration entrance side
To the first check valve of flowing；And/or,
Heating for the indoor heat exchanger be provided with entrance pipe the 3rd switching device.
Alternatively, the heat pump is refrigerating and heating systems；
The 4th switching device is provided with the refrigeration entrance pipe of the outdoor heat exchanger, the 4th switching device is used for
When heat pump enters stopped status by refrigerating state, coolant is to compressor in the refrigeration entrance pipe of cut-out outdoor heat exchanger
The stream in direction；And/or,
Heating for the indoor heat exchanger be provided with entrance pipe the 5th switching device, and the 5th switching device is used for
When heat pump enters stopped status by the state that heats, that cuts off indoor heat exchanger heats in entrance pipe coolant to compressor
The stream in direction.
This utility model additionally provides the refrigeration unit using above-mentioned heat pump.
Heat pump in this utility model, it is provided with bypass line, when heat pump starts, can be by bypass pipe
Road is opened, to balance the pressure reduction between compressor inlet and outlet at short notice, with can be in short-term when compressor start up condition is met
It is interior that compressor start gets up, improve the startup success rate of compressor.Make it possible to, in shutdown, first close described second
The switching device scheduled time turns off compressor, so as to avoid compressor flooded starts from being possibly realized.According in this utility model
Heat pump control method in, be provided with the connecting line between the outdoor heat exchanger and the indoor heat exchanger
Second switch device, when off signal is received, close the second switch device and after continuing for second scheduled time or
When the low-pressure lateral pressure of the heat pump is less than predetermined value, close compressor, as such, it is possible to the coolant in vaporizer is pumped
To having in the condenser of higher refrigerant pressure, so as to store a large amount of coolant so as to cause compressor in vaporizer when avoiding shutting down
Flooded starts；Also, due to being provided with bypass line, while due to compressor inlet and outlet when being also avoided that compressor start
Between high-low pressure difference and the problem that cannot start.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding to of the present utility model, this practicality
New schematic description and description is used to explain this utility model, does not constitute to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 shows the system schematic according to heat pump of the present utility model.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling：
1st, compressor；2nd, condenser；3rd, vaporizer；4th, first throttle device；5th, second switch device；6th, the second throttling dress
Put；7th, first switch device；8th, check valve；9th, bypass line.
Specific embodiment
In the following description, a large amount of concrete details are given this utility model is more thoroughly managed to provide
Solution.It will be apparent, however, to one skilled in the art that this utility model can be without the need for one or more of these thin
Save and be carried out.In other examples, in order to avoid obscuring with this utility model, for more well known in the art
Technical characteristic is not described.
In order to thoroughly understand this utility model, detailed structure will be proposed in following description.Obviously, this utility model
Embodiment be not limited to the specific details that those skilled in the art is familiar with.Preferred embodiment of the present utility model is detailed
It is described as follows, but in addition to these detailed descriptions, this utility model can also have other embodiment.
This utility model provides a kind of heat pump, and it includes being additionally provided with bypass outside conventional coolant circulating system
Pipeline, the two ends of bypass line connect respectively the inlet and outlet of compressor, are provided with for opening and closing on bypass line
The first switch device of bypass line, thus, when heat pump starts, bypass line can be opened, to put down at short notice
Weighing apparatus compressor inlet and outlet between pressure reduction, with when compressor start up condition is met can at short notice by compressor start,
Improve the startup success rate of compressor.
The heat pump that this utility model is provided can be single refrigeration system, single heating, refrigerating and heating systems.
The embodiment of single refrigeration system shown in Figure 1.Heat pump wherein of the present utility model is preferably used
In the refrigeration unit of freezer.As shown in Figure 1, the pressure as cold medium compressor is had according to heat pump of the present utility model
Contracting machine 1；Positioned at the condenser 2 of the outlet downstream side of compressor 1, the wherein condenser 2 is preferably located in the outside of freezer, so that
The heat that coolant is discharged when condensing in condenser 2 is directly arranged to outdoor environment；On the downstream pipe of condenser 2
Second switch device 5, the preferably second switch device 5 is electromagnetic valve, and above-mentioned electromagnetic valve may be electrically connected to heat pump
Control circuit (not shown) on realized according to preset program electromagnetic valve break-make control；Positioned at second switch device 5
The first throttle device 4 in downstream, first throttle device 4 is used for the saturated liquid under condensing pressure in condenser or supercool
Evaporating pressure and evaporating temperature are reduced to after liquid throttling, while according to the change of load, adjusting the coolant in vaporizer
Flow, it is preferable that the first throttle device 4 be choke valve；Positioned at the vaporizer 3 in the downstream of first throttle device 4, wherein should
Vaporizer 3 is preferably located in the indoor of freezer, when coolant evaporation endothermic in vaporizer, the blower fan that vaporizer is set up
(not shown) is opened so that air with coolant constantly into vaporizer to carry out heat exchange, and the sky that will be turned cold after heat release
Pneumatic transmission is returned in freezer, so as to reduce the purpose of temperature of ice house；The refrigerant exit of vaporizer 3 is by pipeline and compressor 1
Import connection, so as to gaseous coolant suction compressor 1 will be evaporated in vaporizer in compress, thus achieve coolant and exist
Recycling in system.Preferably, the sensor for monitoring cold storehouse temperature is also provided with the freezer.
As shown in Figure 1, it is provided with list on the pipeline between the outlet of compressor of the present utility model 1 and condenser 2
To valve 8, specifically, the check valve 8 only allows the one-way flow from compressor 1 to condenser 2, and completely cuts off in condenser 2
Flowing and pressure conduction of the high pressure refrigerant to compressor outlet, so as to reversely separate outlet of the coolant to compressor 1 in condenser 2
Pressure influence.Bypass line 9 is provided between the inlet and outlet of compressor 1, the bypass line 9 is allowed in compressor 1
Coolant can flow to compressor low-pressure side and (flow to air-breathing from the air vent of compressor from the high-pressure side of compressor when not working
Mouthful)；On the bypass line 9, first switch device 7 and second throttling device 6 are disposed in series, the first switch device
Preferably electromagnetic valve, the second throttling device 6 can be capillary tube as shown in Figure 1, or choke valve, this second
Throttling arrangement 6 can reduce flowing through after the second throttling device pressure of coolant and the first switch device can be in its action
Pressure differential between compressor inlet described in Shi Pingheng and outlet.
The course of work of cooling cycle system of the present utility model is described below.In actual moving process, preferred land productivity
With the temperature in the temperature sensor monitors freezer being arranged in freezer judging whether to have reached the halt condition of heat pump.
The condition is for example preferably when the Ku Wen needed for cold storehouse temperature has reached need not further freeze, phased out system
The operation of SAPMAC method system.Specifically, when the temperature in temperature sensor judges freezer reaches predetermined bank temperature, by refrigeration machine
The control circuit of group sends stopping signal, now, closes second switch device 5, while compressor 1 is continued to run with by vaporizer
Coolant in 3 is pumped in the condenser 2 with high refrigerant pressure via compressor 1, due to the presence of check valve 8, can be true
Cold insulation matchmaker is uniaxially delivered in condenser 2, is leaked in vaporizer 3 by compressor 1 without there is on high-tension side coolant.
With the operation of compressor, the refrigerant pressure in vaporizer is gradually lowered, when refrigerant pressure (the i.e. heat pump in vaporizer
Low-pressure lateral pressure) (after can also being a lasting scheduled time, the scheduled time for example can be 10 to 30 to be reduced to scheduled pressure value
Second) when, reflect in vaporizer no longer to exist and be enough to that the coolant of flooded starts can be caused in compressor start, now may be used
To stop the operation of compressor 1.Finally, the blower fan of vaporizer 3 is closed, whole cooling cycle system quits work.Due to evaporation
There is no the coolant that be enough to that flooded starts can be caused in compressor start in device, so that in system of the present utility model
Be not in the situation of compressor flooded starts when SAPMAC method system is again started up work.
When the temperature recovery in temperature sensor monitors to freezer, illustrate to need that freezer is carried out further to freeze to drop
Temperature in low freezer, now needs to restart the heat pump having been switched off.Specifically, the control circuit of refrigeration unit
Starting-up signal is sent, first switch device 7 is opened, compressor high-pressure side coolant is via the first switch device 7 on bypass line 9
Compressor low-pressure side is flowed to second throttling device 6, so as to balance compressor suction and exhaust ports pressure.Specifically, when compressor is arranged
During atmospheric pressure-pressure of inspiration(Pi)≤0.05Mpa, it is believed that compressor suction and exhaust ports pressure belongs to poised state.Further open
Evaporator fan, opens second switch device 5, and thus the coolant with elevated pressures can be filled via second switch in condenser 2
Put 5 and first throttle device 4 flow to vaporizer 3.Wherein, after compressor is opened after the t seconds, t for example can take 20 seconds, close institute
State first switch device 7.Due to the effect of check valve 8, the high pressure refrigerant pressure of condenser 2 is not transferred to going out for compressor 1
Mouthful.In the presence of bypass line 9 between compressor inlet and outlet, through between short time, the inlet and outlet of compressor
Pressure it is in a basic balance so that pressure differential between inlet and outlet is controlled in the scope for allowing compressor normally to start
In (can also be that the scheduled time for example can be 10 to 30 seconds after a lasting scheduled time), and then normally-open compressor, protect
High normal starting rate is demonstrate,proved.
In another embodiment, when heat pump is single heating, check valve is disposed in the interior the system of heat exchanger
On hot entrance pipe.
In a further embodiment, when heat pump is refrigerating and heating systems, the refrigeration entrance pipe of outdoor heat exchanger
On be provided with the 4th switching device, the 4th switching device is used for when heat pump enters stopped status by refrigerating state, cut-out
Stream of the coolant to compressor direction in the refrigeration entrance pipe of outdoor heat exchanger；Being heated for indoor heat exchanger set on entrance pipe
The 5th switching device is equipped with, the 5th switching device is used for when heat pump enters stopped status by the state that heats, and cut-out is indoor
Heat exchanger heats stream of the coolant to compressor direction in entrance pipe.4th switching device and the 5th switching device can be
Two parallel branches that can switch, are check valve on another branch road wherein branch road is path, the 4th switching device and
5th switching device can also be electromagnetic valve.Its specific course of work is similar with single refrigeration system, will not be described here.
Heat pump in this utility model, it is provided with bypass line, when heat pump starts, can be by bypass pipe
Road is opened, to balance the pressure reduction between compressor inlet and outlet at short notice, with can be in short-term when compressor start up condition is met
It is interior that compressor start gets up, improve the startup success rate of compressor.The control of the heat pump in this utility model
In method processed, second switch device is provided with the connecting line between the outdoor heat exchanger and the indoor heat exchanger,
When off signal is received, the second switch device is closed and after continuing for second scheduled time or the heat pump
When low-pressure lateral pressure is less than predetermined value, close compressor, as such, it is possible to the coolant in vaporizer is pumped to higher coolant
In the condenser of pressure, so as to store a large amount of coolant so as to cause compressor flooded starts in vaporizer when avoiding shutting down；Also,
Due to being provided with bypass line, while due to the high-low pressure between compressor inlet and outlet when being also avoided that compressor start
The problem that differ from and cannot start.
Preferred embodiment of the present utility model is the foregoing is only, this utility model is not limited to, for this area
For technical staff, this utility model can have various changes and change.All institutes within spirit of the present utility model and principle
Any modification, equivalent substitution and improvements of work etc., should be included within protection domain of the present utility model.
Claims (7)
1. a kind of heat pump, it is characterised in that including compressor, outdoor heat exchanger, first throttle device and indoor heat exchange
Device, the compressor, outdoor heat exchanger, first throttle device and indoor heat exchanger form coolant circulating system, also including side
Siphunculus road, the two ends of the bypass line connect respectively the inlet and outlet of the compressor, are provided with the bypass line
For opening and closing the first switch device of the bypass line.
2. heat pump according to claim 1, it is characterised in that be additionally provided with the bypass line and described first
The second throttling device of switching device series connection.
3. heat pump according to claim 2, it is characterised in that the second throttling device is capillary tube or throttling
Valve.
4. heat pump according to claim 1, it is characterised in that the outdoor heat exchanger and the indoor heat exchanger it
Between connecting line on be provided with second switch device.
5. heat pump according to claim 1, it is characterised in that the heat pump is single refrigeration system；
It is provided with the refrigeration entrance pipe of the outdoor heat exchanger and only allow coolant to outdoor heat exchanger refrigeration Way in stream
Dynamic check valve.
6. heat pump according to claim 1, it is characterised in that the heat pump is refrigerating and heating systems；
The 4th switching device is provided with the refrigeration entrance pipe of the outdoor heat exchanger, the 4th switching device is used for when heat
When pumping system enters stopped status by refrigerating state, coolant is to compressor direction in the refrigeration entrance pipe of cut-out outdoor heat exchanger
Stream；And/or,
Heating for the indoor heat exchanger be provided with entrance pipe the 5th switching device, and the 5th switching device is used for when heat
When pumping system enters stopped status by the state that heats, that cuts off indoor heat exchanger heats in entrance pipe coolant to compressor direction
Stream.
7. a kind of refrigeration unit, it is characterised in that include the heat pump as described in any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621137792.8U CN206146042U (en) | 2016-10-19 | 2016-10-19 | Heat pump system and refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621137792.8U CN206146042U (en) | 2016-10-19 | 2016-10-19 | Heat pump system and refrigerating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206146042U true CN206146042U (en) | 2017-05-03 |
Family
ID=58623191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621137792.8U Active CN206146042U (en) | 2016-10-19 | 2016-10-19 | Heat pump system and refrigerating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206146042U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403373A (en) * | 2016-10-19 | 2017-02-15 | 珠海格力电器股份有限公司 | Heat pump system, control method and refrigerating unit |
| CN119222877A (en) * | 2024-12-02 | 2024-12-31 | 珠海格力电器股份有限公司 | Refrigeration system control method, device and refrigeration system |
-
2016
- 2016-10-19 CN CN201621137792.8U patent/CN206146042U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403373A (en) * | 2016-10-19 | 2017-02-15 | 珠海格力电器股份有限公司 | Heat pump system, control method and refrigerating unit |
| CN119222877A (en) * | 2024-12-02 | 2024-12-31 | 珠海格力电器股份有限公司 | Refrigeration system control method, device and refrigeration system |
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