CN107906777A - Heat pump unit - Google Patents
Heat pump unit Download PDFInfo
- Publication number
- CN107906777A CN107906777A CN201711003712.9A CN201711003712A CN107906777A CN 107906777 A CN107906777 A CN 107906777A CN 201711003712 A CN201711003712 A CN 201711003712A CN 107906777 A CN107906777 A CN 107906777A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- heat
- pump unit
- heat pump
- defrosting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0232—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses
- F25B2313/02322—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses during defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0234—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in series arrangements
- F25B2313/02342—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in series arrangements during defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
- F25B2347/021—Alternate defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention belongs to air-conditioning technical field, and in particular to a kind of heat pump unit.Present invention seek to address that existing heat pump unit, when defrosting mode is changed to heating mode, a large amount of liquid heat transferring mediums pour in gas-liquid separator the problem of easilying lead to compressor air suction band liquid.For this reason, the heat pump unit of the present invention includes main circulation loop and the defrosting liquid back pipe road being connected with main circulation loop；The compressor to communicate with each other, First Heat Exchanger and the second heat exchanger are provided with main circulation loop, in defrost mode, First Heat Exchanger is used as condenser, and the second heat exchanger is used as evaporator；Liquid back pipe road defrost for after defrosting, liquid heat transferring medium in First Heat Exchanger is directly guided in the second heat exchanger, a large amount of liquid heat transferring mediums flow into gas-liquid separator from First Heat Exchanger and cause its overwork after so as to effectively prevent defrosting, and then cause operative liquid heat transferring medium to enter directly into compressor, cause compressor air suction band liquid and be damaged.
Description
Technical field
The invention belongs to air-conditioning technical field, and in particular to a kind of heat pump unit.
Background technology
With the continuous improvement of people's living standards, people it is also proposed increasingly higher demands to living environment.In order to
Comfortable environment temperature is maintained, air-conditioning equipment has become essential a kind of equipment in people's life.Specifically, existing sky
Equipment is adjusted to use heat pump unit mostly, when the ambient temperature of heat pump unit is very low, the vaporising device of heat pump unit
It is easy to produce frost, at this time, heat pump unit just needs to carry out defrosting processing to vaporising device, and technical staff is with regard to heat pump machine
The defrosting problem of group proposes a variety of schemes.
Specifically, existing heat pump unit is defrosted using the inverse cyclic process of heating mode for vaporising device mostly；This
Although kind of defrosting mode can save production cost on the basis of effective defrosting；But when heat pump unit is needed from defrosting mould
When formula is changed to heating mode, control device control four-way valve turns to, a large amount of unexpected adverse currents of liquid heat transferring medium, at this time, largely
Liquid heat transferring medium can all pour in gas-liquid separator, and the amount that gas-liquid separator is flowed into when the heat transferring medium unit interval exceedes the gas-liquid
During the nominal operation amount of separator, liquid heat transferring medium is easy to enter directly into compressor, and absorbing gas belt is caused to compressor
The danger of liquid, dramatically shortens the service life of compressor, have impact on the reliability of heat pump unit.
Correspondingly, this area needs a kind of new heat pump unit to solve the above problems.
The content of the invention
It has been that the existing heat pump unit of solution is changed to system in defrosting mode to solve the above problem of the prior art
During heat pattern, a large amount of liquid heat transferring mediums pour in gas-liquid separator the problem of easilying lead to compressor air suction band liquid, this hair
Bright to provide a kind of heat pump unit, the heat pump unit includes main circulation loop and is removed with what the main circulation loop was connected
White liquid back pipe road；Wherein, the compressor to communicate with each other, First Heat Exchanger and the second heat exchange are provided with the main circulation loop
Device, in defrost mode, the First Heat Exchanger are used as condenser, and second heat exchanger is used as evaporator；It is described to defrost back
Liquid pipeline is used for after defrosting, and the liquid heat transferring medium in the First Heat Exchanger is directly guided to second heat exchange
In device.
In the optimal technical scheme of above-mentioned heat pump unit, switch valve is provided with the defrosting liquid back pipe road, it is described to remove
The break-make on the defrosting liquid back pipe road is realized by the switch valve in white liquid back pipe road.
In the optimal technical scheme of above-mentioned heat pump unit, the switch valve is solenoid valve.
In the optimal technical scheme of above-mentioned heat pump unit, the main circulation loop includes being arranged on parallel way described
The first major cycle branch and the second major cycle branch between First Heat Exchanger and second heat exchanger, the defrosting liquid back pipe
Road is connected with the second major cycle branch.
In the optimal technical scheme of above-mentioned heat pump unit, the main circulation loop further include be arranged on it is described first master follow
Bridge joint branch between ring branch and the second major cycle branch, described bridge in branch are provided with expansion valve.
In the optimal technical scheme of above-mentioned heat pump unit, the bridge joint branch is by the first major cycle branch and described
Second major cycle branch is respectively divided into Part I and Part II, the defrosting liquid back pipe road and the second major cycle branch
The Part II on road is in parallel；Wherein, the Part I of the first major cycle branch is provided with the first check valve, first master
The Part II of circulation branch road is provided with the second check valve, and it is unidirectional that the Part I of the second major cycle branch is provided with the 3rd
Valve, the Part II of the second major cycle branch are provided with the 4th check valve；First check valve only allows heat transferring medium
The First Heat Exchanger is flowed into, second check valve only allows heat transferring medium to flow into second heat exchanger, and the described 3rd is single
Heat transferring medium is only allowed to flow out the First Heat Exchanger to valve, the 4th check valve only allows heat transferring medium to flow out described second
Heat exchanger.
In the optimal technical scheme of above-mentioned heat pump unit, the First Heat Exchanger is finned heat exchanger.
In the optimal technical scheme of above-mentioned heat pump unit, second heat exchanger is falling-film heat exchanger.
In the optimal technical scheme of above-mentioned heat pump unit, the falling-film heat exchanger includes spray element and heat exchange member
Part；During defrosting, liquid heat transferring medium is directly sprayed on the heat exchange element by the spray element, is removed to shorten
The white time.
In the optimal technical scheme of above-mentioned heat pump unit, the compressor is two-stage screw compressor.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, heat pump unit of the invention
The defrosting liquid back pipe road being connected including main circulation loop and with main circulation loop；Wherein, that are provided with main circulation loop
Compressor, First Heat Exchanger and the second heat exchanger of this connection, in defrost mode, First Heat Exchanger are used as condenser, and second
Heat exchanger is used as evaporator；Defrosting liquid back pipe road is used for after defrosting, and the liquid heat transferring medium in First Heat Exchanger is straight
Connect and be guided in the second heat exchanger, so that a large amount of liquid heat transferring mediums are flowed into from First Heat Exchanger after effectively preventing defrosting
Cause gas-liquid separator to work overloadingly into gas-liquid separator, and then cause a part of liquid heat transferring medium to enter directly into
In compressor, cause compressor air suction band liquid and be damaged.
Brief description of the drawings
Fig. 1 is the rough schematic view of the heat pump unit of the present invention；
Fig. 2 is the overall schematic of the preferred embodiment of the heat pump unit of the present invention.
Description of reference numerals：1st, compressor；2nd, oil eliminator；3rd, pressure maintenance valve；4th, four-way valve；5th, falling film type exchanges heat
Device；61st, the first check valve；62nd, the second check valve；63rd, the 3rd check valve；64th, the 4th check valve；7th, filter；8th, economizer；
9th, expansion valve；10th, finned heat exchanger；11st, gas-liquid separator；12nd, solenoid valve；13rd, wind turbine；14th, oil cooler；15th, flow
Meter；16th, economizer expansion valve；17th, oil cooling but expansion valve；18th, bypass solenoid valve；19th, for solenoid；101st, the first major cycle
Branch；102nd, the second major cycle branch.
Embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.This area skill
Art personnel as needed can make adjustment it, to adapt to specific application scenario.Meanwhile although according to spy in the application
Each step of the fixed order method that the invention has been described, but these are not sequentially restricted, without departing from the present invention
Basic principle on the premise of, those skilled in the art can perform the step in a different order.
It should be noted that in the description of the present invention, the direction or position of the instruction such as term " on ", " under ", "left", "right"
The term for putting relation is based on the direction shown in attached drawing or position relationship, description is so intended merely to facilitate, without referring to
Show or imply described device or element there must be specific orientation or must be with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In addition, term " first ", " second ", " the 3rd ", " the 4th " are only used for description purpose, and
It is not intended that instruction or hint relative importance.
Filled mostly using the inverse cyclic process of heating mode for evaporation based on the existing heat pump unit proposed in background technology
Put the mode to defrost；Although this Defrost mode can save production cost on the basis of effective defrosting；But work as heat
Pump assembly need from defrosting mode change to heating mode when, heat pump unit control device control four-way valve turn to, at this time, greatly
Amount liquid heat transferring medium countercurrently and is poured in gas-liquid separator suddenly, and the amount of gas-liquid separator is flowed into when the heat transferring medium unit interval
More than the gas-liquid separator nominal operation amount when, liquid heat transferring medium is easy to enter directly into compressor, to compressor
Bring the risk of absorbing gas belt liquid.For this reason, the present invention provides a kind of new heat pump unit to solve of the prior art above-mentioned ask
Topic.
Referring initially to Fig. 1, which is the rough schematic view of the heat pump unit of the present invention.As shown in Figure 1, the heat pump of the present invention
Unit includes main circulation loop and the defrosting liquid back pipe road being connected with the main circulation loop；Wherein, the major cycle is returned
The compressor 1 to communicate with each other, finned heat exchanger 10 and falling-film heat exchanger 5 are provided with road, it is in defrost mode, finned
Heat exchanger 10 is used as condenser, and falling-film heat exchanger 5 is used as evaporator；The defrosting liquid back pipe road is used for after defrosting,
Liquid heat transferring medium in finned heat exchanger 10 is directly guided in falling-film heat exchanger 5, so as to effectively prevent defrosting from tying
A large amount of liquid heat transferring mediums flow into gas-liquid separator 11 from finned heat exchanger 10 and cause gas-liquid separator 11 after beam
Overwork, and then causes operative liquid heat transferring medium to enter directly into compressor 1, cause 1 absorbing gas belt liquid of compressor and
It is damaged.
It will be appreciated to those of skill in the art that although in the preferred embodiment, the First Heat Exchanger is fin
Formula heat exchanger 10, and second heat exchanger is falling-film heat exchanger 5；But the First Heat Exchanger and described second changes
Hot device obviously can also be other kinds of heat exchanger, and the change of this heat exchanger types is without departing from the substantially former of the present invention
Reason, therefore fall within protection scope of the present invention.
Further, as shown in Figure 1, the main circulation loop include with parallel way be arranged on finned heat exchanger 10 with
The first major cycle branch 101 and the second major cycle branch 102 between falling-film heat exchanger 5；Wherein, the first major cycle branch
101 are located in upper dotted line frame, and the second major cycle branch 102 is located in lower dotted line frame, and the defrosting liquid back pipe road and second
Major cycle branch 102 connects, and solenoid valve 12 is provided with the defrosting liquid back pipe road, and the defrosting liquid back pipe road passes through solenoid valve
12 realize the break-make on the defrosting liquid back pipe road.It should be noted that, although it is arranged on institute described in this preferred embodiment
The switch valve stated on defrosting liquid back pipe road is solenoid valve 12, and still, the switch valve obviously can also be that other being capable of control pipe
The electricity piece of road break-make, as long as the switch valve can control the break-make on the defrosting liquid back pipe road.Meanwhile the master follows
Loop back path further includes the bridge joint branch being arranged between the first major cycle branch 101 and the second major cycle branch 102, the bridge joint
Expansion valve 9 is provided with branch, expansion valve 9 can be controlled between the first major cycle branch 101 and the second major cycle branch 102
Break-make.
With continued reference to Fig. 1, the bridge joint branch draws the first major cycle branch 101 and the second major cycle branch 102 respectively
It is divided into Part I and Part II, wherein, the Part II of the defrosting liquid back pipe road and the second major cycle branch 102 is simultaneously
Connection, meanwhile, the defrosting liquid back pipe road can also be connected with the 3rd check valve 63.Specifically, the of the first major cycle branch 101
A part is provided with the first check valve 61, and the Part II of the first major cycle branch 101 is provided with the second check valve 62, the second master
The Part I of circulation branch road 102 is provided with the 3rd check valve 63, and the Part II of the second major cycle branch 102 is provided with the 4th
Check valve 64.It should be noted that the first check valve 61 only allows heat transferring medium to flow into finned heat exchanger 10, the second check valve
62 only allow heat transferring medium to flow into falling-film heat exchanger 5, and the 3rd check valve 63 only allows heat transferring medium to flow out finned heat exchanger
10, the 4th check valve 64 only allows heat transferring medium to flow out falling-film heat exchanger 5.
The heating mode of heat pump unit and the operational process of defrosting mode of the present invention is specifically described below in conjunction with Fig. 1；
When the heat pump unit runs heating mode, the circulation process of the heat transferring medium in the heat pump unit is：Compressor 1 → oil
Separator 2 → pressure maintenance valve, 3 → four-way valve the 5 → the 4th 64 → expansion valve of check valve 9 → the first of 4 → falling-film heat exchanger is unidirectional
11 → compressor of valve 61 → finned heat exchanger, 10 → four-way valve, 4 → gas-liquid separator 1.When the heat pump unit runs defrosting mould
During formula, finned heat exchanger 10 is used as condenser, and falling-film heat exchanger 5 is used as evaporator, at this time, changing in the heat pump unit
The circulation process of thermal medium is：4 → finned heat exchanger of compressor 1 → oil eliminator, 2 → pressure maintenance valve, 3 → four-way valve 10 →
3rd 63 → expansion valve of check valve, 9 → the second 4 → gas-liquid separator of check valve 62 → falling-film heat exchanger, 5 → four-way valve, 11 → pressure
Contracting machine 1.
Specifically, when the heat pump unit is in defrosting mode, finned heat exchanger 10 is in high pressure conditions, falling film type
Heat exchanger 5 is low-pressure state；At this time, the liquidation exothermic reaction during defrost of the heat transferring medium in finned heat exchanger 10, to transport
Defrost processing is carried out to finned heat exchanger 10 with heat transferring medium liquefaction liberated heat.It should be noted that existing heat pump machine
Group directly makes four-way valve 4 commutate after defrosting, the heating mode so that heat pump unit brings into operation, four-way valve 4
After commutation, the liquid heat transferring medium in finned heat exchanger 10 is poured in gas-liquid separator 11 by four-way valve 4, so as to lead
Cause gas-liquid separator 11 to work overloadingly, and then easily lead to operative liquid heat transferring medium and enter directly into compressor 1, cause
Make 1 absorbing gas belt liquid of compressor and be damaged.
Further, heat pump unit of the invention is after defrosting terminates, before four-way valve 4 commutates, first by solenoid valve 12
Open；At this time, since finned heat exchanger 10 is in high pressure conditions, falling-film heat exchanger 5 is in low-pressure state, is acted in pressure
Under, the heat transferring medium in finned heat exchanger 10 is flowed directly into falling-film heat exchanger 5 along the direction of arrow in Fig. 1, is passed through
After the scheduled time, the heat pump unit control solenoid valve 12 is closed, while four-way valve 4 is commutated, and the heat pump unit is transported again
Row heating mode.At this time, a large amount of liquid heat transferring mediums in finned heat exchanger 10 have been back in falling-film heat exchanger 5,
Only small part or no liquid heat transferring medium can be flowed into gas-liquid separator 11 at all, meanwhile, the heat exchange of this operative liquid
The amount of medium must not also exceed the rated load of gas-liquid separator 11；Therefore, under the protective effect of gas-liquid separator 11,
Also there will be no the entrance of liquid heat transferring medium in compressor 1 so that the risk of 1 absorbing gas belt liquid of compressor substantially reduces, so that pole
The spoilage of compressor 1 is reduced to big degree, and then effectively extends the service life of compressor 1.
It will be appreciated to those of skill in the art that the determination methods whether present invention does not terminate defrosting make any limit
System, because judging that the method whether defrosting terminates is not within the scope of the present invention, therefore, technical staff can be according to reality
Product needs voluntarily to select the method for the prior art for judging defrosting and terminating, and the change of this determination methods is without departing from this
The basic principle of invention, therefore fall within protection scope of the present invention.In addition, technical staff can also be according to product
The length of the scheduled time described in the condition sets itself such as actual conditions and user demand, as long as after the scheduled time,
Volume of the liquid heat transferring medium in gas-liquid separator 11 not over gas-liquid separator 11 is flowed into by finned heat exchanger 10
Determine workload.
Referring next to Fig. 2, which is the overall schematic of the preferred embodiment of the heat pump unit of the present invention, it is necessary to explanation
It is that the embodiment shown in Fig. 2 is a preferred embodiment of the present invention, is not intended as limiting the scope of the invention.
As shown in Fig. 2, during heat pump unit operation heating mode in this preferred embodiment, heat transferring medium in the heat pump unit follows
Circulation journey is：The 5 → the 4th check valve of 4 → falling-film heat exchanger of compressor 1 → oil eliminator, 2 → pressure maintenance valve, 3 → four-way valve
64 → filter, 7 → economizer, 8 → expansion valve, 9 → the first check valve 61 → finned heat exchanger, 10 → four-way valve 4 → gas-liquid point
From 11 → compressor of device 1.When the heat pump unit runs heating mode, finned heat exchanger 10 is used as evaporator, finned
Liquid heat transferring medium evaporation endothermic in heat exchanger 10, falling-film heat exchanger 5 are used as condenser, meanwhile, in falling-film heat exchanger 5
Gaseous state heat transferring medium liquidation exothermic reaction, to be heated to water.In addition, from the bypass that the exit of economizer 8 distributes
Heat transferring medium throttled by economizer expansion valve 16 after be back to again in economizer 8, and with main road heat exchange be situated between
Matter carries out sufficient heat exchange so that the heat transferring medium supercooling in main road, meanwhile, excessively hot heat transferring medium passes through pressure in bypass
The intermediate fill gas mouth of contracting machine 1 carries out second level compression again with completing after the compressed heat transferring medium of the first order mixes, so that
Temperature into the heat transferring medium of second level compression is effectively reduced, while can also effectively lift the air-breathing of second level compression
Amount, so as to dramatically increase the heating capacity of the heat pump unit.
With continued reference to Fig. 2, the heat pump unit is additionally provided with oil return system and oil cooling system；Specifically, the heat pump
The operational process of the oil return system of unit is：The lubricating oil isolated from oil eliminator 2 is followed by filter 7, bypass electricity
After magnet valve 18, flowmeter 15 and confession solenoid 19, then it is back to the oil-feed port of compressor 1.In addition, when the exhaust of compressor 1
When temperature exceedes predetermined temperature, the operational process of the oil cooling system of the heat pump unit is：Bypass solenoid valve 18 is closed, together
When, open oil cooling but expansion valve 17；At this time, lubricating oil can fully be cooled down by oil cooler 14, then be flowed successively again
Through flowmeter 15 and solenoid 19 is supplied, then is back to the oil-feed port of compressor 1；In addition, the oil cooling but lubricating oil warp in bypass
After crossing oil cooling but expansion valve 17 being throttled, then flow into oil cooler 14, and carry out with the lubricating oil in main road abundant
Heat exchange so that effectively lower lubricating oil temperature so that the heat pump unit can all the time be in even running state.
Further, when the heat pump unit in this preferred embodiment runs defrosting mode, the heat exchange in the heat pump unit
The circulation process of medium is：4 → finned heat exchanger of compressor 1 → oil eliminator, 2 → pressure maintenance valve, 3 → four-way valve 10 → the
Three 8 → expansion valves of check valve 63 → filter, 7 → economizer, 9 → the second 62 → falling-film heat exchanger of check valve, 5 → four-way valve 4 →
11 → compressor of gas-liquid separator 1.When the heat pump unit runs defrosting mode, falling-film heat exchanger 5 is used as evaporator, and
And the liquid heat transferring medium evaporation endothermic in falling-film heat exchanger 5, meanwhile, finned heat exchanger 10 is used as condenser, and wing
Gaseous state heat transferring medium liquidation exothermic reaction in plate heat interchanger 10, to carry out effective defrosting processing to finned heat exchanger 10.
At this time, the liquidation exothermic reaction during defrost of the heat transferring medium in finned heat exchanger 10, to be put when liquefying with heat transferring medium
The heat gone out carries out defrost processing to finned heat exchanger 10.
The heat pump unit of the present invention before four-way valve 4 commutates, is first opened solenoid valve 12 after defrosting, at this time, by
High pressure conditions are in finned heat exchanger 10, falling-film heat exchanger 5 is in low-pressure state, under pressure, finned to change
Heat transferring medium in hot device 10 is flowed directly into falling-film heat exchanger 5 along the direction of arrow in Fig. 2, after the scheduled time,
The heat pump unit control solenoid valve 12 is closed, while four-way valve 4 is commutated, and the heat pump unit reruns heating mode.
At this time, a large amount of liquid heat transferring mediums in finned heat exchanger 10 have been back in falling-film heat exchanger 5, only small part or
No liquid heat transferring medium can flow into gas-liquid separator 11 person at all, and the amount of this operative liquid heat transferring medium is also never
It can exceed that the rated load of gas-liquid separator 11；Therefore, under the protective effect of gas-liquid separator 11, in compressor 1 also
The entrance of liquid heat transferring medium is not had so that the risk of 1 absorbing gas belt liquid of compressor substantially reduces, so as to dramatically reduce
The spoilage of compressor 1, and then effectively extend the service life of compressor 1.
It will be appreciated to those of skill in the art that in an embodiment of the present invention, compressor 1 is preferably two-stage screw pressure
Contracting machine, the delivery temperature of compressor 1 can be effectively reduced due to the use of the two-stage screw compressor and Gas-supplying enthalpy-increasing technology；
Meanwhile oil cooler 14 can effectively stablize the oil temperature supplying of the heat pump unit, it is higher by have in the heat pump unit
In the case of coolant-temperature gage, the oil temperature supplying and delivery temperature of the heat pump unit can also keep stable state, so that institute
Stable operation can also be kept constantly by stating heat pump unit, so that the heat pump unit of the present invention is relatively low in ambient temperature
In the case of can also keep the state of stable operation, while can also ensure that the heat pump unit can export predetermined temperature all the time
Hot water.
Further, falling-film heat exchanger 5 includes spray element and heat exchange element, in the defrosting process of the heat pump unit
In, heat transferring medium can be directly sprayed on the heat exchange element by the spray element, so that falling-film heat exchanger 5 can be fast
Speed enters heat absorption state, at the same time so that finned heat exchanger 10 can also rapidly enter heat release state, so that described in effectively shortening
The defrosting time of heat pump unit.In addition, this fountain heat exchange mode can also effectively reduce the heat transferring medium needed for defrosting
Amount, so that the amount that the heat pump unit runs heat transferring medium required during heating mode can be with operation defrosting mode when institute
The amount of the heat transferring medium needed is equal, so that the heat pump unit of the present invention can cancel the setting of reservoir, and then effectively simplifies and is somebody's turn to do
The structure of heat pump unit.
Finally it should be noted that above-described embodiment is the preferred embodiments of the invention, it is not intended as to the present invention
The limitation of protection domain.Those skilled in the art can be properly added or delete as needed one when actually using the present invention
Part steps, or exchange the order between different step.This basic principle changed not departing from the present invention, belongs to this
The protection domain of invention.
So far, the attached drawing preferred embodiment that the invention has been described is had been combined, still, those skilled in the art easily manage
Solution, protection scope of the present invention are expressly not limited to these embodiments.Before without departing from the principle of the present invention
Put, those skilled in the art can make correlation technique feature equivalent change or replacement, after these are changed or replace it
Technical solution fall within protection scope of the present invention.
Claims (10)
- A kind of 1. heat pump unit, it is characterised in that the heat pump unit include main circulation loop and with the main circulation loop The defrosting liquid back pipe road being connected；Wherein, the compressor to communicate with each other, First Heat Exchanger and the second heat exchanger are provided with the main circulation loop, is being defrosted Under pattern, the First Heat Exchanger is used as condenser, and second heat exchanger is used as evaporator；The defrosting liquid back pipe road is used for after defrosting, by the direct water conservancy diversion of liquid heat transferring medium in the First Heat Exchanger Into second heat exchanger.
- 2. heat pump unit according to claim 1, it is characterised in that switch valve is provided with the defrosting liquid back pipe road, The break-make on the defrosting liquid back pipe road is realized by the switch valve in the defrosting liquid back pipe road.
- 3. heat pump unit according to claim 2, it is characterised in that the switch valve is solenoid valve.
- 4. heat pump unit according to any one of claim 1 to 3, it is characterised in that the main circulation loop include with Parallel way is arranged on the first major cycle branch and the second major cycle between the First Heat Exchanger and second heat exchanger Branch, the defrosting liquid back pipe road are connected with the second major cycle branch.
- 5. heat pump unit according to claim 4, it is characterised in that the main circulation loop, which further includes, is arranged on described Bridge joint branch between one major cycle branch and the second major cycle branch, described bridge in branch are provided with expansion valve.
- 6. heat pump unit according to claim 5, it is characterised in that the branch that bridges is by the first major cycle branch Part I and Part II, the defrosting liquid back pipe road and the described second master are respectively divided into the second major cycle branch The Part II of circulation branch road is in parallel；Wherein, the Part I of the first major cycle branch is provided with the first check valve, and the of the first major cycle branch Two parts are provided with the second check valve, and the Part I of the second major cycle branch is provided with the 3rd check valve, and described second The Part II of major cycle branch is provided with the 4th check valve；First check valve only allows heat transferring medium to flow into the First Heat Exchanger, and second check valve only allows heat exchange to be situated between Mass flow enters second heat exchanger, and the 3rd check valve only allows heat transferring medium to flow out the First Heat Exchanger, and the described 4th Check valve only allows heat transferring medium to flow out second heat exchanger.
- 7. heat pump unit according to claim 1, it is characterised in that the First Heat Exchanger is finned heat exchanger.
- 8. heat pump unit according to claim 1, it is characterised in that second heat exchanger is falling-film heat exchanger.
- 9. heat pump unit according to claim 8, it is characterised in that the falling-film heat exchanger includes spray element and changes Thermal element；During defrosting, liquid heat transferring medium is directly sprayed on the heat exchange element by the spray element, to shorten Defrosting time.
- 10. heat pump unit according to claim 1, it is characterised in that the compressor is two-stage screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003712.9A CN107906777A (en) | 2017-10-24 | 2017-10-24 | Heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003712.9A CN107906777A (en) | 2017-10-24 | 2017-10-24 | Heat pump unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107906777A true CN107906777A (en) | 2018-04-13 |
Family
ID=61841693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711003712.9A Pending CN107906777A (en) | 2017-10-24 | 2017-10-24 | Heat pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107906777A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916106A (en) * | 2019-04-25 | 2019-06-21 | 南京天加环境科技有限公司 | A kind of heat pump air conditioner unit that can control lubricating oil temperature and its control method |
| CN111623553A (en) * | 2020-05-25 | 2020-09-04 | 青岛海尔空调电子有限公司 | Heat pump system |
| CN114198952A (en) * | 2020-08-31 | 2022-03-18 | 施耐德电气It 公司 | System, method, and non-transitory computer readable medium for filter oil separator |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4799363A (en) * | 1986-07-17 | 1989-01-24 | Mitsubishi Denki Kabushiki Kaisha | Room air conditioner |
| JPH1047799A (en) * | 1996-07-26 | 1998-02-20 | Toshiba Corp | Freezing cycle device |
| JPH10306949A (en) * | 1997-05-07 | 1998-11-17 | Mitsubishi Electric Corp | Air conditioner |
| CN101749804A (en) * | 2008-12-02 | 2010-06-23 | 三星电子株式会社 | Air conditioner and control method thereof |
| CN102853575A (en) * | 2012-08-22 | 2013-01-02 | 南京五洲制冷集团有限公司 | Air source falling film water chiller-heater unit |
| CN103759456A (en) * | 2014-01-27 | 2014-04-30 | 平武臣 | Heat exchange system of air conditioner or heat pump and defrosting method of heat exchange system |
| CN204063693U (en) * | 2014-08-21 | 2014-12-31 | 广东美的制冷设备有限公司 | Air-conditioner |
| CN106996657A (en) * | 2015-09-16 | 2017-08-01 | Lg电子株式会社 | Air regulator |
-
2017
- 2017-10-24 CN CN201711003712.9A patent/CN107906777A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4799363A (en) * | 1986-07-17 | 1989-01-24 | Mitsubishi Denki Kabushiki Kaisha | Room air conditioner |
| JPH1047799A (en) * | 1996-07-26 | 1998-02-20 | Toshiba Corp | Freezing cycle device |
| JPH10306949A (en) * | 1997-05-07 | 1998-11-17 | Mitsubishi Electric Corp | Air conditioner |
| CN101749804A (en) * | 2008-12-02 | 2010-06-23 | 三星电子株式会社 | Air conditioner and control method thereof |
| CN102853575A (en) * | 2012-08-22 | 2013-01-02 | 南京五洲制冷集团有限公司 | Air source falling film water chiller-heater unit |
| CN103759456A (en) * | 2014-01-27 | 2014-04-30 | 平武臣 | Heat exchange system of air conditioner or heat pump and defrosting method of heat exchange system |
| CN204063693U (en) * | 2014-08-21 | 2014-12-31 | 广东美的制冷设备有限公司 | Air-conditioner |
| CN106996657A (en) * | 2015-09-16 | 2017-08-01 | Lg电子株式会社 | Air regulator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916106A (en) * | 2019-04-25 | 2019-06-21 | 南京天加环境科技有限公司 | A kind of heat pump air conditioner unit that can control lubricating oil temperature and its control method |
| CN109916106B (en) * | 2019-04-25 | 2024-02-27 | 南京天加环境科技有限公司 | Heat pump air conditioner unit capable of controlling temperature of lubricating oil and control method thereof |
| CN111623553A (en) * | 2020-05-25 | 2020-09-04 | 青岛海尔空调电子有限公司 | Heat pump system |
| WO2021223529A1 (en) * | 2020-05-25 | 2021-11-11 | 青岛海尔空调电子有限公司 | Heat pump system |
| CN114198952A (en) * | 2020-08-31 | 2022-03-18 | 施耐德电气It 公司 | System, method, and non-transitory computer readable medium for filter oil separator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107575971B (en) | Evaporative water chilling unit and control method | |
| CN107906777A (en) | Heat pump unit | |
| CN106642416A (en) | Air conditioner system, composite condenser and operation control method and device of air conditioner system | |
| CN101922823A (en) | Secondary air injection high-efficiency ultralow temperature heat pump unit | |
| KR20150103020A (en) | Refrigeration and/or liquefaction device and corresponding method | |
| CN104197570B (en) | The heating method of a kind of Three-pipe heat recovery multi-connected machine system and system | |
| CN109579358A (en) | A kind of heat pump system with Semiconductors At Low Temperatures compensation economizer | |
| CN212130568U (en) | Liquid air energy storage system | |
| CN109751799A (en) | Combined type cold and heat source air conditioning system and temperature control method | |
| CN108592437A (en) | A kind of air source heat pump that energy storage defrosts step by step | |
| CN210861760U (en) | Natural cooling refrigerating system | |
| CN106352583B (en) | A kind of heat source tower heat pump system utilized based on freezing regeneration and reactivation heat | |
| CN102853576B (en) | Boiling regeneration type heat pump system for heat source tower | |
| CN210624986U (en) | Comprehensive cold and heat source supply optimization energy-saving system | |
| CN205807889U (en) | Condensation pressure regulation device | |
| CN209230075U (en) | A kind of heat pump system with Semiconductors At Low Temperatures compensation economizer | |
| CN113390139B (en) | Carbon dioxide heat pump system | |
| CN207599913U (en) | A kind of air-conditioning air cooling module heat supply hold over system | |
| CN106288563A (en) | Defrosting system for ultra-low-loop temperature air source source pump | |
| CN206787106U (en) | A kind of accumulating type air source heat pump system | |
| CN108917237A (en) | The refrigeration system that one kind of multiple refrigeration modes combine | |
| CN107883606A (en) | A kind of efficient heat source tower heat pump | |
| CN208817774U (en) | The refrigeration system that one kind of multiple refrigeration modes combine | |
| CN208720416U (en) | Superposition type changes in temperature unit | |
| CN100562695C (en) | Refrigerating plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180413 |
|
| RJ01 | Rejection of invention patent application after publication |