CN208222906U - The heat pump system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved - Google Patents
The heat pump system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved Download PDFInfo
- Publication number
- CN208222906U CN208222906U CN201820385339.1U CN201820385339U CN208222906U CN 208222906 U CN208222906 U CN 208222906U CN 201820385339 U CN201820385339 U CN 201820385339U CN 208222906 U CN208222906 U CN 208222906U
- Authority
- CN
- China
- Prior art keywords
- interface
- valve
- way reversing
- reversing valve
- compressor
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses the heat pump systems of a kind of achievable variable-flow single stage compress circulation and two-stage compression cycle, it is desirable to provide a kind of high-efficient, low system of initial cost.Including refrigeration compressor set, function four-way reversing valve, intercooler, outdoor unit, indoor unit, the first valve, the second valve, first throttle valve and second throttle；In refrigeration compressor set, every compressor forms a compression unit with corresponding adjusting four-way reversing valve；In each compression unit, the exhaust end of compressor is connected with the corresponding first interface for adjusting four-way reversing valve, the suction end of compressor is connect with the third interface for adjusting four-way reversing valve, the second interface of adjusting four-way reversing valve in every group of compression unit is divided into the second interface and third interface of refrigeration compressor set after being connected in parallel, adjust four-way reversing valve the 4th interface be connected in parallel after be divided into the first interface and the 4th interface of refrigeration compressor set.System switching is flexible and convenient, and high-efficient, operating cost is low.
Description
Technical field
The utility model relates to technical field of heat pumps, and more specifically, it relates to a kind of achievable variable-flow single stage compress
The heat pump system of circulation and two-stage compression cycle.
Background technique
With the increase of environmental protection pressure, country widelys popularize coal and changes electric product.Air source heat pump is since it is with energy-saving ring
The characteristic of guarantor is widely used in a variety of applications.In order to adapt to winter low temperature environment, using two-stage compression cycle air source heat pump, to mention
High system effectiveness, and heating can be realized under -25 DEG C of outdoor temperatures.
Existing two-stage compression heat pump system has single-head and multi-machine heads two ways, generally using centre in single-head
Tonifying Qi mode realizes Two-stage Compression, at this point, the minimum cylinder volume of high pressure stage compressor and low-pressure stage compressor is than being generally fixed as 1: 3
Or 1: 2.Since the evaporating pressure of heat pump system can change with outdoor environment temperature, the intermediate pressure and hiigh pressure stage pressure of system
Contracting machine and the cylinder ratio of low-pressure stage compressor also can constantly change, this is not for designed high-low pressure cylinder ratio
Economical.Although existing multi-machine heads mode height is arbitrarily downgraded, compressor uses converter technique to guarantee suitably to compress and when close
Suitable cylinder ratio, but but higher cost and compressed format fix, when summer cooling, for two-stage compression heat pump system
Speech, if according to can satisfy -25 DEG C of outdoor temperature space heating loads needs design, in other words these area air-sources
Heat pump is arranged based on winter thermic load, and hiigh pressure stage and low-pressure stage compressor cannot use simultaneously when summer cooling, meeting when operation
There is more than half compressor idle, operating cost is high, and system initial cost is big.
Utility model content
The purpose of this utility model is to be directed to technological deficiency existing in the prior art, and providing one kind can be according to refrigeration
Amount needs to carry out single stage compress circulation and switches with two-stage compression cycle, and refrigerant flow is adjustable, can reduce user's operating cost
With the heat pump system of initial cost.
It is for technical solution used by realization the purpose of this utility model:
A kind of heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle, including refrigeration compressor
Group, function four-way reversing valve, intercooler, outdoor unit, indoor unit, the first valve, the second valve, third valve, first segment
Flow valve and second throttle；The refrigeration compressor set includes multiple compressors and adjusting four identical with the number of compressors
Logical reversal valve, every compressor form a compression unit with corresponding adjusting four-way reversing valve；It is single in each compression
In member, the exhaust end of the compressor is connected with the corresponding first interface for adjusting four-way reversing valve, the suction of the compressor
Gas end is connect with the third interface for adjusting four-way reversing valve, the adjusting four-way reversing valve in compression unit described in every group
Second interface be connected in parallel after be divided into the second interface and third interface of refrigeration compressor set, the four-way reversing valve that adjusts
4th interface is divided into the first interface and the 4th interface of refrigeration compressor set after being connected in parallel；The adjacent adjusting four-way reversing valve
Second interface between and the 4th interface between be separately installed with regulating valve；The suction of the compressor of the corresponding same compression unit
The regulating valve of gas end and exhaust end is opened simultaneously or is simultaneously closed off；The first interface of the refrigeration compressor set and the indoor unit
One end connection, the second interface of the refrigeration compressor set connect by second valve with the second of the intercooler
Mouthful connection, the third interface of the refrigeration compressor set connect with one end of the outdoor unit, and the of the refrigeration compressor set
It is connect after four interfaces are in parallel with the second interface of the function four-way reversing valve with the third interface of the intercooler；It is described
The first interface of intercooler is connect with third valve one end, and the third valve other end is divided into two-way, a-road-through
It crosses the second throttle to connect with the other end of the indoor unit, another way passes through first valve and the function four-way
The first interface of reversal valve connects, and the 4th interface of the intercooler passes through the first throttle valve and the function four-way
The third interface of reversal valve connects, and the 4th interface of the function four-way reversing valve is connect with the other end of the outdoor unit.
When summer is with the operation of single stage compress parallel circulating, the regulating valve in the refrigeration compressor set is fully open, the
One valve is opened, and the second valve, third valve are closed, and the first interface for adjusting four-way reversing valve is connected with second interface
Logical, the third interface for adjusting four-way reversing valve is connected with the 4th interface, the first interface of the function four-way reversing valve
It is connected with the 4th interface, the second interface of the function four-way reversing valve is connected with third interface；Through institute after working medium compression
State adjust four-way reversing valve, refrigeration compressor set third interface enter the outdoor unit in condense, condensed working medium is through institute
After stating function four-way reversing valve, the first valve, second throttle enter in the indoor unit and evaporate, generate refrigeration phenomenon, later,
First interface, adjusting four-way reversing valve of the working medium again through the refrigeration compressor set return to the refrigeration compressor set；Pass through institute
The start and stop quantity for stating compressor in refrigeration compressor set realizes energy adjustment.
When summer system is with not exclusively cooling two-stage compression cycle operation among two-step throttle, first valve is closed
It closes, second valve, third valve are opened, and the first interface of the function four-way reversing valve is connected with second interface, institute
The third interface for stating function four-way reversing valve is connected with the 4th interface, the first interface and second for adjusting four-way reversing valve
Interface is connected, and the third interface for adjusting four-way reversing valve is connected with the 4th interface；Close to the refrigeration compressor set
The partial shrinkage machine of third interface side is as high pressure stage compressor, close to the portion of refrigeration compressor set second interface side
Partial compression machine is as low-pressure stage compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, low-pressure stage pressure
The suction end of contracting machine interconnects, exhaust end is interconnected, between low-pressure stage compressor and the exhaust end of high pressure stage compressor and
It is not connected to mutually between suction end；The high pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve, refrigerant compression
The third interface of unit, which enters in the outdoor unit, to be condensed, and condensed working medium is through the function four-way reversing valve, first throttle
Valve enters evaporation endothermic in the intercooler, the degree of superheat of heat steam is pressed through in reduction, later, working medium is again through the third
Valve, second throttle are evaporated into the indoor unit, generate refrigeration phenomenon, then first through the refrigeration compressor set connects
Mouth adjusts the suction end that four-way reversing valve enters the low-pressure stage compressor；Meanwhile the low-pressure stage compressor compresses working medium
Enter in the intercooler by the adjusting four-way reversing valve, the second interface of refrigeration compressor set, the second valve and puts
Heat reduces the degree of superheat, then the 4th interface through the refrigeration compressor set and adjusting four-way reversing valve enter the refrigerant compression
The suction end of the high pressure stage compressor of unit；By controlling the start and stop of each compressor and corresponding pressure in the refrigeration compressor set
System changeable flow adjustment of just arbitrarily downgrading is realized in the opening and closing of one group of regulating valve of contracting unit.
When summer is with cooling two-stage compression cycle operation completely among two-step throttle, the first valve, the second valve and the
Three valves are opened, and the first interface of the function four-way reversing valve is connected with second interface, the function four-way reversing valve
Third interface is connected with the 4th interface, and the first interface for adjusting four-way reversing valve is connected with second interface, the tune
The third interface of section four-way reversing valve is connected with the 4th interface；Close to the part of the refrigeration compressor set third interface side
Compressor is as high pressure stage compressor, and the partial shrinkage machine close to refrigeration compressor set second interface side is as low-pressure stage
Compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, and the suction end of low-pressure stage compressor is mutually connected
Logical, exhaust end is interconnected, and is not connected to mutually between low-pressure stage compressor and the exhaust end of high pressure stage compressor and between suction end；
The third interface through the adjusting four-way reversing valve, refrigeration compressor set enters institute after the high pressure stage compressor compresses working medium
It states in outdoor unit and condenses, condensed working medium enters the intercooler through the function four-way reversing valve, first throttle valve
Middle evaporation endothermic presses through the degree of superheat of heat steam in reduction, and later, working medium is divided into two parts after the third valve, a part
Working medium enters the function four-way reversing valve through first valve；Another part working medium is through the second throttle second throttle
Enter the indoor unit afterwards to evaporate, generates refrigeration phenomenon, first interface, tune of the working medium after evaporation through the refrigeration compressor set
Save the suction end that four-way reversing valve enters the low-pressure stage compressor of the refrigeration compressor set；The low-pressure stage compressor is by working medium
After compression through the adjusting four-way reversing valve, the second valve enter the intercooler in heat release, reduce the degree of superheat, then with come
Liquid two-phase working substance of calming the anger from function four-way reversing valve second interface mixing becomes saturated vapor, through the refrigerant compression
4th interface of unit adjusts the high pressure stage compressor suction end that four-way reversing valve enters the refrigeration compressor set；Pass through control
It makes the start and stop of each compressor in the refrigeration compressor set and height is realized in the opening and closing of one group of regulating valve of corresponding compression unit
System of arbitrarily downgrading changeable flow adjustment.
When in winter with the operation of single stage compress parallel circulating, the regulating valve in the refrigeration compressor set is fully open, institute
The first valve opening is stated, second valve, third valve are closed, and the first interface for adjusting four-way reversing valve connects with the 4th
Mouthful it is connected, the second interface for adjusting four-way reversing valve is connected with third interface, and the of the function four-way reversing valve
One interface is connected with the 4th interface, and the second interface of the function four-way reversing valve is connected with third interface；Working medium compression
Enter in the indoor unit by the first interface of the adjusting four-way reversing valve, refrigeration compressor set and condense, it is existing to generate heating
As condensed working medium throttles into the second throttle, enters again through first valve, function four-way reversing valve later
It is evaporated in the outdoor unit, absorbs outdoor environment heat, then the third interface through the refrigeration compressor set, adjusting four-way commutation
Valve returns to the refrigeration compressor set；Start and stop quantity by controlling compressor in the refrigeration compressor set realizes energy tune
Section；
When being run in winter with two-stage compression cycle not exclusively cooling among two-step throttle, first valve is closed, institute
It states the second valve and third valve is opened, the first interface of the function four-way reversing valve is connected with second interface, the function
The third interface of energy four-way reversing valve is connected with the 4th interface, the first interface and the 4th interface for adjusting four-way reversing valve
It is connected, the second interface for adjusting four-way reversing valve is connected with third interface；Close to the refrigeration compressor set second
The partial shrinkage machine of interface side as high pressure stage compressor, press by the part close to the refrigeration compressor set third interface side
Contracting machine is as low-pressure stage compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, low-pressure stage compressor
Suction end interconnect, exhaust end is interconnected, between low-pressure stage compressor and the exhaust end of high pressure stage compressor and air-breathing
It is not connected to mutually between end；The high pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve, refrigeration compressor set
First interface enter the indoor unit in condense, generate heating phenomenon, condensed working medium is through the second throttle, third
Valve enters evaporation endothermic in the intercooler, presses through the degree of superheat of heat steam in reduction, then through the first throttle valve,
Function four-way reversing valve is evaporated into the outdoor unit, absorbs outdoor environment heat, then the third through the refrigeration compressor set
Interface adjusts the suction end that four-way reversing valve enters the low-pressure stage compressor of the refrigeration compressor set；The low-pressure stage compression
The 4th interface through the adjusting four-way reversing valve, refrigeration compressor set enters in the intercooler after machine compresses working medium
Heat release reduces the degree of superheat, then enters institute through second valve, the second interface of refrigeration compressor set, adjusting four-way reversing valve
State the high pressure stage compressor suction end of refrigeration compressor set；By the start and stop for controlling each compressor in the refrigeration compressor set
And system changeable flow adjustment of just arbitrarily downgrading is realized in the opening and closing of one group of regulating valve of corresponding compression unit.
In winter among two-step throttle completely cooling two-stage compression cycle operation when, the first valve, the second valve and the
Three valves are opened, and the first interface of the function four-way reversing valve is connected with second interface, the function four-way reversing valve
Third interface is connected with the 4th interface, and the first interface for adjusting four-way reversing valve is connected with the 4th interface, the tune
The third interface of section four-way reversing valve is connected with second interface；Close to the part of refrigeration compressor set second interface side
Compressor is as high pressure stage compressor, and the partial shrinkage machine close to the refrigeration compressor set third interface side is as low-pressure stage
Compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, and the suction end of low-pressure stage compressor is mutually connected
Logical, exhaust end is interconnected, and is not connected to mutually between low-pressure stage compressor and the exhaust end of high pressure stage compressor and between suction end；
The first interface through the adjusting four-way reversing valve, refrigeration compressor set enters institute after the high pressure stage compressor compresses working medium
It states in indoor unit and condenses, generate heating phenomenon, condensed working medium working medium after second throttle throttling is divided into two parts, and one
Part enters the function four-way reversing valve through first valve；Another part is cold into the centre through the third valve
But evaporation endothermic in device presses through the degree of superheat of heat steam in reduction, then enters through the first throttle valve, function four-way reversing valve
The outdoor unit evaporation absorbs outdoor environment heat, then the third interface through the refrigeration compressor set, adjusting four-way reversing valve
Into the suction end of the refrigeration compressor set low-pressure stage compressor；After the low-pressure stage compressor compresses working medium and from institute
It states and enters heat release again in the intercooler after calming the anger the mixing of liquid two-phase working substance in function four-way reversing valve second interface,
Become saturated vapor to middle pressure steam, then through second valve, the first interface of refrigeration compressor set, adjusting four-way reversing valve
Into the high pressure stage compressor suction end of the refrigeration compressor set；By controlling each compressor in the refrigeration compressor set
Start and stop and the opening and closing of one group of regulating valve of corresponding compression unit realize that height is arbitrarily downgraded system changeable flow adjustment.
Compressor in the refrigeration compressor set is screw compressor, rotor compressor, helical-lobe compressor and piston pressure
Any one of contracting machine.
The first throttle valve and second throttle are electric expansion valve, heating power expansion valve, capillary or orifice throttle dress
It sets.
Compared with prior art, the utility model has the beneficial effects that
1, the heat pump system of the utility model can be realized by the opening and closing of regulating valve and the interface transformation of four-way reversing valve
The switching of single stage compress and Two-stage Compression is easy to energy adjustment when as two-stage compression heat pump system, can be realized hiigh pressure stage
The mutual conversion of compressor and low-pressure stage compressor, improves the efficiency of heat pump system.Simultaneously in summer heat pump system as air-conditioning
In use, whole compressors can come into operation, cooling in summer amount is improved, the initial cost of system is reduced, reduces operation
Cost reaches energy-efficient purpose.
2, when as the operation of single stage compress parallel connection heat pump system, refrigeration compressor can all pass through the unit of the utility model
Start-up and shut-down control realizes energy adjustment.The unit of the utility model as two-stage compression heat pump system when running, refrigeration compressor
Compressor in group can unlatching by one group of regulating valve of the suction end and exhaust end of start and stop and corresponding compressor and pass
The ratio between number of units and grade that puts into operation for changing hiigh pressure stage refrigeration compressor and low-pressure stage refrigeration compressor is closed, is convenient between grade
Energy adjustment, hiigh pressure stage refrigeration system and low-pressure stage refrigeration system working medium flow proportion are rationally, it can be achieved that refrigeration and heat pump system
Small temperature difference undulated control, it can be achieved that cooling system amount or heating capacity effective adjusting.
3, single stage compress system may be implemented in the variable-flow single stage compress parallel connection of the utility model and two-stage compression heat pump system
Not exclusively cooling two-stage compression refrigeration circulation, the completely cooling Two-stage Compression system in second throttle centre among SAPMAC method, second throttle
It is complete among the not exclusively cooling two-stage compression heat pump circulation in SAPMAC method, single stage compress heat pump cycle, second throttle centre, second throttle
Complete cooling two-stage compression heat pump circulation, system switching flexibly, can be adapted for various working.
4, in the refrigeration compressor set of the utility model, every compressor is connected separately with four-way reversing valve, entire unit
Longer life expectancy, not will lead to the shutdown of entire unit, and every after the damage of four-way reversing valve that every compressor is separately connected
The four-way reversing valve specification that compressor is separately connected is smaller, cheap, readily replaceable.
Detailed description of the invention
Fig. 1, which show the utility model, can realize variable-flow single stage compress circulation and the heat pump system of two-stage compression cycle
Structural schematic diagram；
Fig. 2 show the structural schematic diagram of refrigeration compressor set.
Specific embodiment
The utility model is described in detail below in conjunction with specific embodiment.
The utility model can realize the schematic diagram of the heat pump system of variable-flow single stage compress circulation and two-stage compression cycle such as
Shown in Fig. 1-Fig. 2, including refrigeration compressor set 1, function four-way reversing valve 2, intercooler 3, outdoor unit 5, indoor unit 6,
One valve 7-1, the second valve 7-2, third valve 7-3, first throttle valve 4-1 and second throttle 4-2.The refrigeration compressor
Group 1 includes multiple compressors 10 and adjustings four-way reversing valve 8 identical with the number of compressors, every compressor 10 with relatively
The adjusting four-way reversing valve 8 answered forms a compression unit.In each compression unit, the exhaust end of the compressor 10
It is connected with the corresponding first interface for adjusting four-way reversing valve 8, the suction end of the compressor 10 is changed with the adjusting four-way
It is connected to the third interface of valve 8, the second interface of the adjusting four-way reversing valve in each compression unit is connected in parallel
It is divided into the second interface 1-2 and third interface 1-3 of refrigeration compressor set afterwards, the 4th interface for adjusting four-way reversing valve 8 is simultaneously
It is divided into the first interface 1-1 and the 4th interface 1-4 of refrigeration compressor set after connection connection.The adjacent adjusting four-way reversing valve 8
Regulating valve 9 is separately installed between second interface and between the 4th interface.The suction of the compressor of the corresponding same compression unit
The regulating valve of gas end and exhaust end is opened simultaneously or is simultaneously closed off.The first interface 1-1 of the refrigeration compressor set and the room
One end of interior machine 6 connects, and the second interface 1-2 of the refrigeration compressor set is cold by the second valve 7-2 and the centre
But the second interface connection of device 3, the third interface 1-3 of the refrigeration compressor set is connect with one end of the outdoor unit 5, described
After 4th interface 1-4 of refrigeration compressor set is in parallel with the second interface of the function four-way reversing valve 2 with the cooling during rolling
The third interface of device 3 connects.The first interface of the intercooler 3 is connect with described one end third valve 7-3, the third
The valve 7-3 other end is divided into two-way, is connect all the way by the second throttle 4-2 with the other end of the indoor unit 6, another
Road is connect by the first valve 7-1 with the first interface of the function four-way reversing valve 2, and the of the intercooler 3
Four interfaces are connect by the first throttle valve 4-1 with the third interface of the function four-way reversing valve 2, and the function four-way changes
It is connect to the 4th interface of valve 2 with the other end of the outdoor unit 5.
Single stage compress refrigeration may be implemented in the variable-flow single stage compress parallel connection of the utility model and two-stage compression heat pump system
Complete cooling two-stage compression refrigeration among the not exclusively cooling two-stage compression refrigeration circulation in circulation, second throttle centre, second throttle
It is complete among the not exclusively cooling two-stage compression heat pump circulation in circulation, single stage compress heat pump cycle, second throttle centre, second throttle
Cooling two-stage compression heat pump circulation, system switching are flexible.
When summer is with the operation of single stage compress parallel circulating, the regulating valve 9 in refrigeration compressor set 1 is fully open, and first
Valve 7-1 is opened, and the second valve 7-2, third valve 7-3 are closed, and the first interface for adjusting four-way reversing valve 8 connects with second
Mouth is connected, and the third interface for adjusting four-way reversing valve 8 is connected with the 4th interface, the function four-way reversing valve 2
First interface is connected with the 4th interface, and the second interface of the function four-way reversing valve 2 is connected with third interface.Working medium pressure
Third interface 1-3 through the adjusting four-way reversing valve 8, refrigeration compressor set after contracting, which enters in the outdoor unit 5, to be condensed, and is condensed
Working medium afterwards after the function four-way reversing valve 2, the first valve 7-1, second throttle 4-1 enter the indoor unit 6 in steam
Hair generates refrigeration phenomenon, and later, the first interface 1-1 through the refrigeration compressor set, adjusting four-way reversing valve 8 return working medium again
To the refrigeration compressor set.Energy adjustment is realized by the start and stop quantity of compressor in the refrigeration compressor set 1.
When summer system is with not exclusively cooling two-stage compression cycle operation among two-step throttle, the first valve 7-1
It closes, the second valve 7-2, third valve 7-3 are opened, the first interface and second interface of the function four-way reversing valve 2
It is connected, the third interface of the function four-way reversing valve 2 is connected with the 4th interface, described to adjust the of four-way reversing valve 8
One interface is connected with second interface, and the third interface for adjusting four-way reversing valve 8 is connected with the 4th interface.Close to described
The partial shrinkage machine of the side refrigeration compressor set third interface 10-3 is as high pressure stage compressor, close to the refrigeration compressor set
The partial shrinkage machine of the side second interface 1-2 is as low-pressure stage compressor.The suction end of high-temperature level compressor is interconnected, is vented
End is interconnected, and the suction end of low-temperature level compressor interconnects, exhaust end is interconnected, low-temperature level compressor and high-temperature level pressure
It is not connected to mutually between the exhaust end of contracting machine, is not connected to mutually between suction end.The high pressure stage compressor working medium is compressed after through institute
State adjust four-way reversing valve 8, refrigeration compressor set third interface 1-3 enter the outdoor unit 5 in condense, condensed working medium
Enter evaporation endothermic in the intercooler 3 through the function four-way reversing valve 2, first throttle valve 4-1, presses through heat in reduction
The degree of superheat of steam, later, working medium are evaporated through the third valve 7-3, second throttle 4-2 into the indoor unit 6 again, are produced
Raw refrigeration phenomenon, then the first interface 1-1 through the refrigeration compressor set, adjusting four-way reversing valve 8 enter the low-pressure stage pressure
The suction end of contracting machine.Meanwhile the low-pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve 8, refrigerant compression
The second interface 1-2 of unit, the second valve 7-2 enter heat release in the intercooler 3, reduce the degree of superheat, then through the system
The 4th interface 1-4 and adjusting four-way reversing valve 8 of cold compression unit enter the high pressure stage compressor of the refrigeration compressor set
Suction end.By controlling one group of regulating valve of the start and stop of each compressor and corresponding compression unit in the refrigeration compressor set
System changeable flow adjustment of just arbitrarily downgrading is realized in opening and closing.
When summer is with cooling two-stage compression cycle operation completely among two-step throttle, the first valve 7-1, the second valve 7-
2 and third valve 7-3 is opened, and the first interface of the function four-way reversing valve 2 is connected with second interface, the function four-way
The third interface of reversal valve 2 is connected with the 4th interface, and the first interface for adjusting four-way reversing valve 8 is connected with second interface
Logical, the third interface for adjusting four-way reversing valve 8 is connected with the 4th interface.Close to the refrigeration compressor set third interface
The partial shrinkage machine of the side 1-3 is as high pressure stage compressor, close to the part of the side refrigeration compressor set second interface 1-2
Compressor is as low-pressure stage compressor.The suction end of high-temperature level compressor is interconnected, exhaust end is interconnected, low-temperature level compression
The suction end of machine interconnects, exhaust end is interconnected, between low-temperature level compressor and the exhaust end of high-temperature level compressor mutually not
It is not connected to mutually between connection, suction end.The high pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve 8, system
The third interface 1-3 of cold compression unit, which enters in the outdoor unit 5, to be condensed, and condensed working medium is through the function four-way reversing valve
2, first throttle valve 4-1 enters evaporation endothermic in the intercooler 3, and the degree of superheat of heat steam, later, work are pressed through in reduction
Matter is divided into two parts after the third valve 7-3, and a part of working medium commutates through the first valve 7-1 into the function four-way
Valve 2；Another part working medium enters the indoor unit 6 after the second throttle 4-2 second throttle and evaporates, and it is existing to generate refrigeration
As first interface 1-1, adjusting four-way reversing valve 8 of the working medium through the refrigeration compressor set after evaporation enter the refrigeration and press
The suction end of the low-pressure stage compressor of contracting unit 1.The low-pressure stage compressor commutates after compressing working medium through the adjusting four-way
Valve 8, the second valve 7-2 enter heat release in the intercooler 3, reduce the degree of superheat, then commutate with from the function four-way
Liquid two-phase working substance of calming the anger in the second interface of valve 2 mixing becomes saturated vapor, the 4th interface 1- through the refrigeration compressor set
4, the high pressure stage compressor suction end that four-way reversing valve 8 enters the refrigeration compressor set 1 is adjusted.By controlling the refrigeration pressure
System unsteady flow of just arbitrarily downgrading is realized in the opening and closing of one group of regulating valve of the start and stop of each compressor and corresponding compression unit in contracting unit
Amount is adjusted.
When in winter with the operation of single stage compress parallel circulating, the regulating valve 9 in the refrigeration compressor set 1 is fully open,
The first valve 7-1 is opened, and the second valve 7-2, third valve 7-3 are closed, described to adjust the first of four-way reversing valve 8
Interface is connected with the 4th interface, and the second interface for adjusting four-way reversing valve 8 is connected with third interface, the function four
The first interface of logical reversal valve 2 is connected with the 4th interface, second interface and the third interface phase of the function four-way reversing valve 2
Connection.First interface 1-1 through the adjusting four-way reversing valve 8, refrigeration compressor set after working medium compression enters the indoor unit 6
Middle condensation generates heating phenomenon, and condensed working medium throttles into the second throttle 4-2, later again through first valve
Door 7-1, function four-way reversing valve 2, which enter in the outdoor unit 5, to be evaporated, and absorbs outdoor environment heat, then through the refrigerant compression
Third interface 1-3, the adjusting four-way reversing valve 8 of unit return to the refrigeration compressor set 1.By controlling the refrigeration compressor
The start and stop quantity of compressor realizes energy adjustment in group.
When being run in winter with two-stage compression cycle not exclusively cooling among two-step throttle, the first valve 7-1 is closed,
The second valve 7-2 and third valve 7-3 is opened, and the first interface of the function four-way reversing valve 2 is connected with second interface
Logical, the third interface of the function four-way reversing valve 2 is connected with the 4th interface, and the first of the adjusting four-way reversing valve 8 connects
Mouth is connected with the 4th interface, and the second interface for adjusting four-way reversing valve 8 is connected with third interface.Close to the refrigeration
The partial shrinkage machine of the side compressor set second interface 1-2 is as high pressure stage compressor, close to the refrigeration compressor set third
The partial shrinkage machine of the side interface 1-3 is as low-pressure stage compressor.The suction end of high-temperature level compressor is interconnected, exhaust end phase
Intercommunicated, the suction end of low-temperature level compressor interconnects, exhaust end is interconnected, low-temperature level compressor and high-temperature level compressor
Exhaust end between be not connected to mutually, be not connected to mutually between suction end.The high pressure stage compressor working medium is compressed after through the tune
Section four-way reversing valve 8, refrigeration compressor set first interface 1-1 enter the indoor unit 6 in condense, generate heating phenomenon, it is cold
Working medium after solidifying enters evaporation endothermic in the intercooler 3 through the second throttle 4-2, third valve 7-3, in reduction
The degree of superheat of heat steam is pressed through, then enters the outdoor unit 5 through the first throttle valve 4-1, function four-way reversing valve 2 and evaporates,
Outdoor environment heat is absorbed, then the third interface 1-3 through the refrigeration compressor set, adjusting four-way reversing valve 8 enter the system
The suction end of the low-pressure stage compressor of cold compression unit 1.The low-pressure stage compressor working medium is compressed after through the adjusting four-way
Reversal valve 8, refrigeration compressor set the 4th interface 1-4 enter heat release in the intercooler 3, the degree of superheat is reduced, then through institute
It states the second valve 7-2, the second interface 1-2 of refrigeration compressor set, adjusting four-way reversing valve 8 and enters the refrigeration compressor set 1
High pressure stage compressor suction end.By controlling the start and stop of each compressor and corresponding compression unit in the refrigeration compressor set
The opening and closing of one group of regulating valve realize that height is arbitrarily downgraded system changeable flow adjustment.
When being run in winter with two-stage compression cycle completely cooling among two-step throttle, the first valve 7-1, the second valve 7-
2 and third valve 7-3 is opened, and the first interface of the function four-way reversing valve 2 is connected with second interface, the function four-way
The third interface of reversal valve 2 is connected with the 4th interface, and the first interface for adjusting four-way reversing valve 8 is connected with the 4th interface
Logical, the third interface for adjusting four-way reversing valve 8 is connected with second interface.Close to the refrigeration compressor set second interface
The partial shrinkage machine of the side 1-2 is as high pressure stage compressor, close to the part of the side the refrigeration compressor set third interface 1-3
Compressor is as low-pressure stage compressor.The suction end of high-temperature level compressor is interconnected, exhaust end is interconnected, low-temperature level compression
The suction end of machine interconnects, exhaust end is interconnected, between low-temperature level compressor and the exhaust end of high-temperature level compressor mutually not
It is not connected to mutually between connection, suction end.The high pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve 8, system
The first interface 1-1 of cold compression unit, which enters in the indoor unit 6, to be condensed, and is generated and is heated phenomenon, described in condensed working medium warp
Working medium is divided into two parts after second throttle 4-2 throttling, and a part enters the function four-way reversing valve through the first valve 7-1
2；Another part enters evaporation endothermic in the intercooler 3 through the third valve 7-3, and the mistake of heat steam is pressed through in reduction
Temperature, then enter the outdoor unit 5 through the first throttle valve 4-1, function four-way reversing valve 2 and evaporate, absorb outdoor environment heat
Amount, then the third interface 1-3 through the refrigeration compressor set, adjusting four-way reversing valve 8 enter 1 low pressure of refrigeration compressor set
The suction end of grade compressor.The low-pressure stage compressor connects after compressing working medium with from the function four-way reversing valve 2 second
It is calmed the anger after liquid two-phase working substance mixes in mouthful and enters heat release again in the intercooler 3, steamed until middle pressure steam becomes saturation
Gas, then enter the refrigeration through the second valve 7-2, the first interface 1-1 of refrigeration compressor set, adjusting four-way reversing valve 8
The high pressure stage compressor suction end of compressor set 1；By controlling in the refrigeration compressor set start and stop of each compressor and right
The opening and closing of one group of regulating valve of compression unit is answered to realize system changeable flow adjustment of just arbitrarily downgrading.
In the utility model, the compressor in the refrigeration compressor set is screw compressor, rotor compressor, screw rod pressure
Any one of contracting machine and piston compressor.
The first throttle valve and second throttle are electric expansion valve, heating power expansion valve, capillary or orifice throttle dress
It sets.
In the achievable variable-flow single stage compress parallel connection of the utility model and two-stage compression heat pump system, four-way can be passed through
The movement of reversal valve switches between variable-flow single stage compress parallel connection refrigeration system and variable-flow double-stage compressive refrigerating system, unsteady flow
Switch between amount single stage compress parallel connection heat pump system and variable-flow two-stage compression heat pump system, and can be existed by the movement of valve
The completely cooling Two-stage Compression system of not exclusively cooling double-stage compressive refrigerating system and second throttle centre among variable-flow second throttle
Switch between cooling system, and Two-stage Compression can not exclusively be cooled down among variable-flow second throttle by the movement of the first valve
Switch between completely cooling two-stage compression heat pump system among heat pump system and second throttle.In variable-flow single stage compress taken in conjunction
In system, energy adjustment is realized by the start and stop number of units of compressor in control refrigeration compressor set.In double-stage compressive refrigerating system,
By controlling to adjust the on and off of solenoid valve in groups, height may be implemented and arbitrarily downgrade the changes in flow rate of system, interstage matched.
The variable-flow single stage compress of the utility model is in parallel and two-stage compression heat pump system is in specific use, refrigerant compression
Machine can be partly or entirely using frequency refrigeration compressor be determined, to reduce investment.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (9)
1. a kind of heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle, which is characterized in that including system
Cold compression unit, function four-way reversing valve, intercooler, outdoor unit, indoor unit, the first valve, the second valve, third valve
Door, first throttle valve and second throttle；The refrigeration compressor set include multiple compressors and with the number of compressors phase
Same adjusting four-way reversing valve, every compressor form a compression unit with corresponding adjusting four-way reversing valve；Each
In the compression unit, the exhaust end of the compressor is connected with the corresponding first interface for adjusting four-way reversing valve, described
The suction end of compressor is connect with the third interface for adjusting four-way reversing valve, the adjusting in compression unit described in every group
The second interface of four-way reversing valve is divided into the second interface and third interface of refrigeration compressor set after being connected in parallel, described to adjust four
4th interface of logical reversal valve is divided into the first interface and the 4th interface of refrigeration compressor set after being connected in parallel；The adjacent adjusting
Regulating valve is separately installed between the second interface of four-way reversing valve and between the 4th interface；The corresponding same compression unit
The suction end of compressor and the regulating valve of exhaust end are opened simultaneously or are simultaneously closed off；The first interface of the refrigeration compressor set with
One end of the indoor unit connects, and the second interface of the refrigeration compressor set passes through second valve and the cooling during rolling
The second interface of device connects, and the third interface of the refrigeration compressor set is connect with one end of the outdoor unit, the refrigeration pressure
It is connect after 4th interface of contracting unit is in parallel with the second interface of the function four-way reversing valve with the third of the intercooler
Mouth connection；The first interface of the intercooler is connect with third valve one end, and the third valve other end is divided into
Two-way is connect by the second throttle with the other end of the indoor unit all the way, another way by first valve with
The first interface of the function four-way reversing valve connects, the 4th interface of the intercooler by the first throttle valve and
The third interface of the function four-way reversing valve connects, and the 4th interface of the function four-way reversing valve is another with the outdoor unit
One end connection.
2. the heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle according to claim 1,
It is characterized in that, when summer is with the operation of single stage compress parallel circulating, the regulating valve in the refrigeration compressor set is fully open, the
One valve is opened, and the second valve, third valve are closed, and the first interface for adjusting four-way reversing valve is connected with second interface
Logical, the third interface for adjusting four-way reversing valve is connected with the 4th interface, the first interface of the function four-way reversing valve
It is connected with the 4th interface, the second interface of the function four-way reversing valve is connected with third interface；Through institute after working medium compression
State adjust four-way reversing valve, refrigeration compressor set third interface enter the outdoor unit in condense, condensed working medium is through institute
After stating function four-way reversing valve, the first valve, second throttle enter in the indoor unit and evaporate, generate refrigeration phenomenon, later,
First interface, adjusting four-way reversing valve of the working medium again through the refrigeration compressor set return to the refrigeration compressor set；Pass through institute
The start and stop quantity for stating compressor in refrigeration compressor set realizes energy adjustment.
3. the heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle according to claim 1,
It is characterized in that, when summer system is with not exclusively cooling two-stage compression cycle operation among two-step throttle, first valve is closed
It closes, second valve, third valve are opened, and the first interface of the function four-way reversing valve is connected with second interface, institute
The third interface for stating function four-way reversing valve is connected with the 4th interface, the first interface and second for adjusting four-way reversing valve
Interface is connected, and the third interface for adjusting four-way reversing valve is connected with the 4th interface；Close to the refrigeration compressor set
The partial shrinkage machine of third interface side is as high pressure stage compressor, close to the portion of refrigeration compressor set second interface side
Partial compression machine is as low-pressure stage compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, low-pressure stage pressure
The suction end of contracting machine interconnects, exhaust end is interconnected, between low-pressure stage compressor and the exhaust end of high pressure stage compressor and
It is not connected to mutually between suction end；The high pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve, refrigerant compression
The third interface of unit, which enters in the outdoor unit, to be condensed, and condensed working medium is through the function four-way reversing valve, first throttle
Valve enters evaporation endothermic in the intercooler, the degree of superheat of heat steam is pressed through in reduction, later, working medium is again through the third
Valve, second throttle are evaporated into the indoor unit, generate refrigeration phenomenon, then first through the refrigeration compressor set connects
Mouth adjusts the suction end that four-way reversing valve enters the low-pressure stage compressor；Meanwhile the low-pressure stage compressor compresses working medium
Enter in the intercooler by the adjusting four-way reversing valve, the second interface of refrigeration compressor set, the second valve and puts
Heat reduces the degree of superheat, then the 4th interface through the refrigeration compressor set and adjusting four-way reversing valve enter the refrigerant compression
The suction end of the high pressure stage compressor of unit；By controlling the start and stop of each compressor and corresponding pressure in the refrigeration compressor set
System changeable flow adjustment of just arbitrarily downgrading is realized in the opening and closing of one group of regulating valve of contracting unit.
4. the heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle according to claim 1,
It is characterized in that, when summer is with cooling two-stage compression cycle operation completely among two-step throttle, the first valve, the second valve and the
Three valves are opened, and the first interface of the function four-way reversing valve is connected with second interface, the function four-way reversing valve
Third interface is connected with the 4th interface, and the first interface for adjusting four-way reversing valve is connected with second interface, the tune
The third interface of section four-way reversing valve is connected with the 4th interface；Close to the part of the refrigeration compressor set third interface side
Compressor is as high pressure stage compressor, and the partial shrinkage machine close to refrigeration compressor set second interface side is as low-pressure stage
Compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, and the suction end of low-pressure stage compressor is mutually connected
Logical, exhaust end is interconnected, and is not connected to mutually between low-pressure stage compressor and the exhaust end of high pressure stage compressor and between suction end；
The third interface through the adjusting four-way reversing valve, refrigeration compressor set enters institute after the high pressure stage compressor compresses working medium
It states in outdoor unit and condenses, condensed working medium enters the intercooler through the function four-way reversing valve, first throttle valve
Middle evaporation endothermic presses through the degree of superheat of heat steam in reduction, and later, working medium is divided into two parts after the third valve, a part
Working medium enters the function four-way reversing valve through first valve；Another part working medium is through the second throttle second throttle
Enter the indoor unit afterwards to evaporate, generates refrigeration phenomenon, first interface, tune of the working medium after evaporation through the refrigeration compressor set
Save the suction end that four-way reversing valve enters the low-pressure stage compressor of the refrigeration compressor set；The low-pressure stage compressor is by working medium
After compression through the adjusting four-way reversing valve, the second valve enter the intercooler in heat release, reduce the degree of superheat, then with come
Liquid two-phase working substance of calming the anger from function four-way reversing valve second interface mixing becomes saturated vapor, through the refrigerant compression
4th interface of unit adjusts the high pressure stage compressor suction end that four-way reversing valve enters the refrigeration compressor set；Pass through control
It makes the start and stop of each compressor in the refrigeration compressor set and height is realized in the opening and closing of one group of regulating valve of corresponding compression unit
System of arbitrarily downgrading changeable flow adjustment.
5. the heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle according to claim 1,
It is characterized in that, when being run in winter with single stage compress parallel circulating, the regulating valve in the refrigeration compressor set is fully open, institute
The first valve opening is stated, second valve, third valve are closed, and the first interface for adjusting four-way reversing valve connects with the 4th
Mouthful it is connected, the second interface for adjusting four-way reversing valve is connected with third interface, and the of the function four-way reversing valve
One interface is connected with the 4th interface, and the second interface of the function four-way reversing valve is connected with third interface；Working medium compression
Enter in the indoor unit by the first interface of the adjusting four-way reversing valve, refrigeration compressor set and condense, it is existing to generate heating
As condensed working medium throttles into the second throttle, enters again through first valve, function four-way reversing valve later
It is evaporated in the outdoor unit, absorbs outdoor environment heat, then the third interface through the refrigeration compressor set, adjusting four-way commutation
Valve returns to the refrigeration compressor set；Start and stop quantity by controlling compressor in the refrigeration compressor set realizes energy tune
Section.
6. the heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle according to claim 1,
It is characterized in that, when being run in winter with two-stage compression cycle not exclusively cooling among two-step throttle, first valve is closed, institute
It states the second valve and third valve is opened, the first interface of the function four-way reversing valve is connected with second interface, the function
The third interface of energy four-way reversing valve is connected with the 4th interface, the first interface and the 4th interface for adjusting four-way reversing valve
It is connected, the second interface for adjusting four-way reversing valve is connected with third interface；Close to the refrigeration compressor set second
The partial shrinkage machine of interface side as high pressure stage compressor, press by the part close to the refrigeration compressor set third interface side
Contracting machine is as low-pressure stage compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, low-pressure stage compressor
Suction end interconnect, exhaust end is interconnected, between low-pressure stage compressor and the exhaust end of high pressure stage compressor and air-breathing
It is not connected to mutually between end；The high pressure stage compressor working medium is compressed after through the adjusting four-way reversing valve, refrigeration compressor set
First interface enter the indoor unit in condense, generate heating phenomenon, condensed working medium is through the second throttle, third
Valve enters evaporation endothermic in the intercooler, presses through the degree of superheat of heat steam in reduction, then through the first throttle valve,
Function four-way reversing valve is evaporated into the outdoor unit, absorbs outdoor environment heat, then the third through the refrigeration compressor set
Interface adjusts the suction end that four-way reversing valve enters the low-pressure stage compressor of the refrigeration compressor set；The low-pressure stage compression
The 4th interface through the adjusting four-way reversing valve, refrigeration compressor set enters in the intercooler after machine compresses working medium
Heat release reduces the degree of superheat, then enters institute through second valve, the second interface of refrigeration compressor set, adjusting four-way reversing valve
State the high pressure stage compressor suction end of refrigeration compressor set；By the start and stop for controlling each compressor in the refrigeration compressor set
And system changeable flow adjustment of just arbitrarily downgrading is realized in the opening and closing of one group of regulating valve of corresponding compression unit.
7. the heat pump system of achievable variable-flow single stage compress circulation and two-stage compression cycle according to claim 1,
Be characterized in that, in winter among two-step throttle completely cooling two-stage compression cycle operation when, the first valve, the second valve and the
Three valves are opened, and the first interface of the function four-way reversing valve is connected with second interface, the function four-way reversing valve
Third interface is connected with the 4th interface, and the first interface for adjusting four-way reversing valve is connected with the 4th interface, the tune
The third interface of section four-way reversing valve is connected with second interface；Close to the part of refrigeration compressor set second interface side
Compressor is as high pressure stage compressor, and the partial shrinkage machine close to the refrigeration compressor set third interface side is as low-pressure stage
Compressor；The suction end of high pressure stage compressor is interconnected, exhaust end is interconnected, and the suction end of low-pressure stage compressor is mutually connected
Logical, exhaust end is interconnected, and is not connected to mutually between low-pressure stage compressor and the exhaust end of high pressure stage compressor and between suction end；
The first interface through the adjusting four-way reversing valve, refrigeration compressor set enters institute after the high pressure stage compressor compresses working medium
It states in indoor unit and condenses, generate heating phenomenon, condensed working medium working medium after second throttle throttling is divided into two parts, and one
Part enters the function four-way reversing valve through first valve；Another part is cold into the centre through the third valve
But evaporation endothermic in device presses through the degree of superheat of heat steam in reduction, then enters through the first throttle valve, function four-way reversing valve
The outdoor unit evaporation absorbs outdoor environment heat, then the third interface through the refrigeration compressor set, adjusting four-way reversing valve
Into the suction end of the refrigeration compressor set low-pressure stage compressor；After the low-pressure stage compressor compresses working medium and from institute
It states and enters heat release again in the intercooler after calming the anger the mixing of liquid two-phase working substance in function four-way reversing valve second interface,
Become saturated vapor to middle pressure steam, then through second valve, the first interface of refrigeration compressor set, adjusting four-way reversing valve
Into the high pressure stage compressor suction end of the refrigeration compressor set；By controlling each compressor in the refrigeration compressor set
Start and stop and the opening and closing of one group of regulating valve of corresponding compression unit realize that height is arbitrarily downgraded system changeable flow adjustment.
8. the heat of achievable variable-flow single stage compress circulation and two-stage compression cycle described in any one of -7 according to claim 1
Pumping system, which is characterized in that the compressor in the refrigeration compressor set is screw compressor, rotor compressor, screw compression
Any one of machine and piston compressor.
9. the heat of achievable variable-flow single stage compress circulation and two-stage compression cycle described in any one of -7 according to claim 1
Pumping system, which is characterized in that the first throttle valve and second throttle be electric expansion valve, heating power expansion valve, capillary or
Throttle orifice plate apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820385339.1U CN208222906U (en) | 2018-03-21 | 2018-03-21 | The heat pump system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820385339.1U CN208222906U (en) | 2018-03-21 | 2018-03-21 | The heat pump system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208222906U true CN208222906U (en) | 2018-12-11 |
Family
ID=64504191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820385339.1U Expired - Fee Related CN208222906U (en) | 2018-03-21 | 2018-03-21 | The heat pump system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208222906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253655A (en) * | 2018-03-21 | 2018-07-06 | 天津商业大学 | Variable-flow single stage compress cycle and the heat pump system of two-stage compression cycle can be achieved |
-
2018
- 2018-03-21 CN CN201820385339.1U patent/CN208222906U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253655A (en) * | 2018-03-21 | 2018-07-06 | 天津商业大学 | Variable-flow single stage compress cycle and the heat pump system of two-stage compression cycle can be achieved |
| CN108253655B (en) * | 2018-03-21 | 2024-03-01 | 天津商业大学 | Heat pump system capable of realizing variable flow single-stage compression cycle and double-stage compression cycle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105444453B (en) | A kind of dual temperature refrigeration and heating | |
| CN102022851B (en) | Two-stage compression refrigerating system | |
| CN102032705B (en) | Two-stage compression heat pump system | |
| CN110374876A (en) | Dual temperature independent compressor and air-conditioning system parallel | |
| CN103968460A (en) | Air conditioning system | |
| CN107024031A (en) | A kind of three pressure high-efficiency air cooling source pumps suitable for the big temperature difference | |
| CN108759138A (en) | The operation method and system of not exclusively cooling refrigeration system among second throttle | |
| CN109737641A (en) | A kind of air injection enthalpy-increasing heat pump circulating system using zeotrope with subcooler | |
| CN108253655A (en) | Variable-flow single stage compress cycle and the heat pump system of two-stage compression cycle can be achieved | |
| CN203823909U (en) | Air conditioning system | |
| CN108253654B (en) | Heat pump system capable of realizing variable flow single-stage circulation and double-stage circulation | |
| CN201935467U (en) | Double-stage compressing and refrigerating system | |
| CN201909490U (en) | Double-stage compression heat pump system | |
| CN208222906U (en) | The heat pump system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved | |
| CN208222889U (en) | The refrigeration system of variable-flow single stage compress circulation and two-stage compression cycle can be achieved | |
| CN208222905U (en) | The heat pump system of variable-flow single-stage circulation and dual-stage servo system can be achieved | |
| CN205373127U (en) | Two temperature refrigeration and heating | |
| CN108278793B (en) | Heat pump system capable of realizing variable flow single-stage compression cycle and cascade cycle | |
| CN208871901U (en) | Not exclusively cooling two-stage compression heat pump system among second throttle | |
| CN208091005U (en) | The refrigeration system of variable-flow single stage compress cycle and cascade cycle can be achieved | |
| CN101140111A (en) | Capacity adjustable cyclone compressor refrigeration system | |
| CN208222908U (en) | The heat pump system of variable-flow single stage compress circulation and autocascade cycle | |
| CN208222907U (en) | Variable-flow multi-cycle heat pump system | |
| CN205641653U (en) | Cascade refrigeration system of unsteady flow volume simplex matter sharing condenser and evaporimeter | |
| CN208091003U (en) | The heat pump system of variable-flow single stage compress cycle and autocascade cycle can be achieved |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181211 Termination date: 20190321 |