CN207035539U - Refrigerating circulatory device - Google Patents
Refrigerating circulatory device Download PDFInfo
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- CN207035539U CN207035539U CN201590001296.7U CN201590001296U CN207035539U CN 207035539 U CN207035539 U CN 207035539U CN 201590001296 U CN201590001296 U CN 201590001296U CN 207035539 U CN207035539 U CN 207035539U
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- 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
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- 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
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- 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
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- 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
- F25B2313/029—Control issues
- F25B2313/0292—Control issues related to reversing valves
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- 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
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/16—Receivers
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- 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
- F25B2600/2519—On-off valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model provides a kind of refrigerating circulatory device, and the refrigerating circulatory device is configured to possess：Refrigerant loop, the refrigerant loop include compressor, flow passage selector device, heat source side heat exchanger, Section 1 stream device and utilize side heat exchanger；And return liquid and suppress loop, this time liquid suppresses loop and is connected in parallel with Section 1 stream device, and going back to liquid suppression loop includes Section 2 stream device, open and close valve and the high pressure storage tank being connected between Section 2 stream device and open and close valve.
Description
Technical field
It the utility model is related to refrigerating circulatory device.
Background technology
In the past, it is known to and water is cooled down and heated and generates air-cooled type heat-pump chiller of cold water and hot water etc.
Refrigerating circulatory device.In existing refrigerating circulatory device, following situation be present, i.e.,：Heat is generated under low external air temperature
During water, frost is produced in the air heat exchanger that the heat source side of function is played as evaporator.If produced in air heat exchanger
Frost, then the heat exchange of extraneous air and refrigerant is hindered, so as to cause the heating efficiency of refrigerating circulatory device to reduce.Therefore,
Know the defrosting operating carried out for melting the frost of air heat exchanger.
In patent document 1, it is proposed that carry out the refrigerating circulatory device of defrosting operating.In the kind of refrigeration cycle of patent document 1
In device, defrosting operating condition set up in the case of, invert refrigerant flow path, make air heat exchanger as condenser and
Function is played, so that the frost of air heat exchanger melts.In addition, in the refrigerating circulatory device of patent document 1, relative to setting
The throttle mechanism (expansion valve) between air heat exchanger is exchanged with water device is put, is connected in parallel to the bypass with magnetic valve
Loop.Moreover, being configured to open magnetic valve when defrosting operating starts, refrigerant is set to be flowed to water heat exchanger side, so as to
Suppress the reduction of the low pressure as caused by the supply deficiency of refrigerant.
Patent document 1:Japanese Unexamined Patent Publication 2012-7800 publications
Here, in possessing the existing refrigerating circulatory device for stockpiling the high pressure storage tank of residual refrigerant, system is made
Refrigerant line reversion in the case of carrying out defrosting operating, at the beginning of defrosting operating, is accumulated in the liquid system of high pressure storage tank
Cryogen is flowed by water heat exchanger to compressor, so as to there is a situation where to produce back liquid.In order to suppress such towards pressure
Contracting machine returns liquid, considers to set reservoir in the suction side of compressor, liquid refrigerant is accumulated in into reservoir.However, liquid storage
The capacity of device is larger, and larger installation space is needed in Machine Room, therefore can cause maximization and the cost increase of device.
Utility model content
The utility model proposes that its object is to provide a kind of suppression defrosting in order to solve problem as described above
The refrigerating circulatory device for returning liquid towards compressor during operating etc..
Refrigerating circulatory device involved by the utility model possesses：Refrigerant loop, it includes compressor, stream switching dress
Put, heat source side heat exchanger, Section 1 stream device and utilize side heat exchanger；And return liquid and suppress loop, itself and Section 1 stream
Device is connected in parallel, and is returned liquid and is suppressed loop including Section 2 stream device, open and close valve and be connected to Section 2 stream device and open and close valve
Between high pressure storage tank.
Refrigerating circulatory device according to involved by the utility model, can when defrosting operating starts or at the end of etc. suppression
Make towards compressor and return liquid.
Brief description of the drawings
Fig. 1 is the figure for the refrigerant loop structure for representing the refrigerating circulatory device in embodiment 1 of the present utility model.
Fig. 2 is the figure for the control structure for representing the refrigerating circulatory device in embodiment 1 of the present utility model.
Fig. 3 is the flow chart for the flow for representing the defrosting operating in embodiment 1 of the present utility model.
Fig. 4 is the flow chart for representing the flow at the end of the defrosting operating in embodiment 2 of the present utility model.
Fig. 5 is the figure for the refrigerant loop structure for representing the refrigerating circulatory device in existing example.
Embodiment
Hereinafter, the embodiment of refrigerating circulatory device of the present utility model is described in detail based on accompanying drawing.
Embodiment 1.
Fig. 1 is the refrigerant loop structure for representing the refrigerating circulatory device 100 in embodiment 1 of the present utility model
Figure.The refrigerating circulatory device 100 of present embodiment is used as cooling down water and being heated and generates cold water and hot water
Air-cooled type heat-pump chiller.As shown in figure 1, refrigerating circulatory device 100 possesses refrigerant loop, the refrigerant loop includes compression
Machine 11, flow passage selector device 12, heat source side heat exchanger 13, fan 14, Section 1 stream device 15 and utilization side heat exchanger
17.In addition, refrigerating circulatory device 100, which possesses back liquid, suppresses loop 40, this time liquid suppress loop 40 include Section 2 stream device 18,
High pressure storage tank 16 and open and close valve 19, they are connected in parallel with Section 1 stream device 15.Also, refrigerating circulatory device 100 possesses pair
Refrigerant loop and time liquid suppress the control unit 20 (Fig. 2) that loop 40 is controlled.
Compressor 11 is, for example, the positive displacement compressor to drive by the motor (not shown) controlled by inverter.Stream
Circuit switching device 12 is the device switched over to the flow direction of refrigerant, such as is made up of four-way valve.Flow passage selector device
12 cool down operate when, as Fig. 1 it is shown in solid the stream of refrigerant is switched over, heat operate when, such as Fig. 1
The stream of refrigerant is switched over like that shown in dotted line.
Heat source side heat exchanger 13 is the air heat exchanger that heat exchange is carried out with the air of outdoor, such as by including heat conduction
The fin tube heat exchanger of the cross-fin formula of pipe and multiple fins is formed.Heat source side heat exchanger 13 is made when cooling down and operating
Function is played for the condenser of refrigerant, function is played as the evaporator of refrigerant when heating operating.Fan 14 is
Heat source side heat exchanger 13 supplies the pressure fan of air, the propeller being driven for example by fan motor (not shown)
Formula fan is formed.Fan 14 has following function, i.e.,：Suck outdoor air, and will by heat source side heat exchanger 13 and with
The air of heat exchange has been carried out between refrigerant to outdoor discharge.
Section 1 stream device 15 has the function of depressurizing refrigerant and expand, such as is made up of electric expansion valve.Section 1
Stream device 15 is connected in series between heat source side heat exchanger 13 and using side heat exchanger 17.Utilize side heat exchange
Device 17 is the water heat exchanger with carrying out heat exchange using the water of side, such as is made up of heat-exchangers of the plate type.Utilize side heat exchange
Device 17 as the evaporator of refrigerant plays function when cooling down and operating, heat operate when as refrigerant condenser and
Play function.
High pressure storage tank 16 has the function of stockpiling residual refrigerant, and it is connected in series in Section 2 stream device 18
Between open and close valve 19.Section 2 stream device 18 has the function of depressurizing refrigerant and expand, such as by electric expansion valve structure
Into.Section 2 stream device 18 is connected in series between heat source side heat exchanger 13 and high pressure storage tank 16.Open and close valve 19
Such as it is made up of magnetic valve, it is connected in series between high pressure storage tank 16 and using side heat exchanger 17.Section 2 stream
Device 18, high pressure storage tank 16 and open and close valve 19 be connected in series to and form back liquid suppress loop 40, and with Section 1 stream
Device 15 is connected in parallel.
In addition, in the refrigerant that refrigerating circulatory device 100 can use, unitary system cryogen, near-azeotrope mixing be present
Refrigerant, mixed non-azeotropic refrigerant etc..In near-azeotrope mix refrigerant, exist the R410A as HFC refrigerant,
R404A etc..The near-azeotrope mix refrigerant also has in addition to with mixed non-azeotropic refrigerant identical characteristic
The characteristic of R22 about 1.6 times of operating pressure.In mixed non-azeotropic refrigerant, exist as HFC (HFC) refrigerant
R407C etc..The mixed non-azeotropic refrigerant is the mixture of the different refrigerant of boiling point, therefore has liquid phase refrigerant and gas
The different characteristic of the composition ratio of phase refrigerant.
In addition, refrigerating circulatory device 100 is provided with various sensors.Specifically, set in heat source side heat exchanger 13
It is equipped with the heat detected to the temperature of heat source side heat exchanger 13 and hands over temperature sensor 31.Heat hands over temperature sensor 31 to attachment
Detected in the white temperature of heat source side heat exchanger 13, such as the heat conducting pipe being arranged in heat source side heat exchanger 13.Separately
Outside, in the gateway using side heat exchanger 17, it is respectively arranged with the inlet temperature sensing detected to the temperature of refrigerant
Device 32 and outlet temperature sensor 33.Based on the system detected by inlet temperature sensor 32 and outlet temperature sensor 33
Refrigerant temperature, Section 1 stream device 15 and Section 2 stream device 18 are controlled using control unit 20.Also, in refrigerating circulatory device
100 part for being configured at outdoor, is provided with the external air temperature sensor 34 for being detected to external air temperature.
Although in addition, in Fig. 1 and not shown, refrigerating circulatory device 100 can possess to be detected to the suction pressure of refrigerant
Sensor, the discharge temperature of refrigerant is detected sensor, to the system at the gateway of heat source side heat exchanger 13
Sensor that the temperature of cryogen is detected etc..
Fig. 2 is the figure for the control structure for representing refrigerating circulatory device 100.Control unit 20 is each to refrigerating circulatory device 100
Portion is controlled, and it is by the structure such as microcomputer or DSP (Digital Signal Processor digital signal processors)
Into.Control unit 20 be based on include heat hand over temperature sensor 31, inlet temperature sensor 32, outlet temperature sensor 33 and outside
The testing result of the various sensors of portion's air temperature sensor 34, to control the speed of compressor 11, stream switching dress
Put 12 switching, air output, the aperture of Section 1 stream device 15 and Section 2 stream device 18 and the opening for open and close valve 19 of fan 14
Close.
Next, the action to refrigerating circulatory device 100 illustrates.First, the cooling fortune to refrigerating circulatory device 100
Action when turning illustrates.Cool down operate when, using flow passage selector device 12 as Fig. 1 it is shown in solid switch refrigeration
The stream of agent.In addition, open and close valve 19 is fixed with the state of opening, Section 1 stream device 15 and Section 2 stream device 18 are by control
Portion 20 processed and based on the degree of superheat and by control aperture.Specifically, control unit 20 determines Section 1 stream device 15 and Section 2 stream
The aperture of device 18, to cause according to as the temperature detected by inlet temperature sensor 32 and outlet temperature sensor 33
And the degree of superheat (the suction degree of superheat of compressor 11) tried to achieve turns into desired value (such as 3 DEG C~5 DEG C).
By the gas refrigerant of compressor 11 compresses and discharges HTHP by flow passage selector device 12 and to heat
Source heat exchanger 13 flows into.The refrigerant for flowing into the HTHP of heat source side heat exchanger 13 radiates to outdoor air etc.,
So as to condense and turn into the liquid refrigerant of high pressure.The liquid refrigerant of the high pressure flowed out from heat source side heat exchanger 13 is to the 1st
Throttling arrangement 15 flows into, and expands and depressurize and turn into the gas-liquid two-phase refrigerant of low-temp low-pressure.From Section 1 stream device
The gas-liquid two-phase refrigerant of 15 outflows is flowed into using side heat exchanger 17.In addition, now, residual refrigerant passes through Section 2 stream
Device 18 and be accumulated in high pressure storage tank 16.It is flowed into and carries out heat exchange with water using the gas-liquid two-phase refrigerant of side heat exchanger 17
And evaporate, so as to the gas refrigerant as low-temp low-pressure.It is inhaled into from the gas refrigerant flowed out using side heat exchanger 17
To compressor 11 and it is re-compressed.
Next, action when being operated to heating illustrates.When heating operating, flow passage selector device 12 is utilized as schemed
Switch the stream of refrigerant shown in 1 dotted line like that.In addition, open and close valve 19 is fixed with the state of opening, Section 1 stream device
15 and Section 2 stream device 18 by control unit 20 and based on degree of subcooling and by control aperture.Specifically, control unit 20 is determined
The aperture of fixed 1st throttling arrangement 15 and Section 2 stream device 18, to cause according to by inlet temperature sensor 32 and outlet
Temperature that temperature sensor 33 detects and the degree of subcooling exported using side heat exchanger 17 tried to achieve turns into desired value (example
Such as 3 DEG C~5 DEG C).
By the gas refrigerant of compressor 11 compresses and discharges HTHP by flow passage selector device 12 and to utilization
Side heat exchanger 17 flows into.The refrigerant using the HTHP of side heat exchanger 17 is flowed into water-cooled, so as to condense simultaneously
As the liquid refrigerant of high pressure.From the liquid refrigerant of the high pressure flowed out using side heat exchanger 17 to Section 1 stream device 15
Flow into, and expand and depressurize and turn into the gas-liquid two-phase refrigerant of low-temp low-pressure.The gas-liquid flowed out from Section 1 stream device 15
Two-phase system cryogen heat source side heat exchanger 13 flows into.In addition, now, residual refrigerant is accumulated in high pressure storage tank 16.Flow into
The gas-liquid two-phase refrigerant of heat source side heat exchanger 13 carries out heat exchange with outdoor air and evaporated, so as to as low-temp low-pressure
Gas refrigerant.The gas refrigerant flowed out from heat source side heat exchanger 13 is sucked into compressor 11 and is re-compressed.
In addition, for refrigerating circulatory device 100, when above-mentioned heating operates, produced in heat source side heat exchanger 13
In the case of frost, the defrosting operating for melting the frost of heat source side heat exchanger 13 is carried out.Specifically, control unit 20 is such as
Fruit is judged as that the defrosting operating of heat source side heat exchanger 13 starts condition and set up when heating and operating, then switches flow passage selector device
12, enter to exercise the cooling operating that heat source side heat exchanger 13 plays function as condenser.In addition, now, control unit 20 is controlled
Section 2 stream device 18 and open and close valve 19 processed are warm by using side so as to suppress to be accumulated in the liquid refrigerant of high pressure storage tank 16
Exchanger 17 flows to compressor 11 and produces back the situation of liquid.
Fig. 3 is the flow chart of the flow for the defrosting operating for representing present embodiment.As shown in figure 3, first, utilize control unit
20 come judge heat operate when defrosting operating start whether condition is set up (S1).Here, when by being arranged at heat source side heat exchange
The heat that the heat of device 13 hands over temperature sensor 31 to detect hands over temperature or the outside detected by external air temperature sensor 34
In the case that air themperature is less than defined temperature (such as 0 DEG C), it is judged as generating frost in heat source side heat exchanger 13, removes
White operation start condition is set up.Then, (S1 in the case that condition is set up is started in defrosting operating：It is), by Section 2 stream device 18
(S2) is completely closed, also closes open and close valve 19 (S3).Thus, the pressure in high pressure storage tank 16 is maintained at the state of high pressure
Under, liquid refrigerant is accumulated in high pressure storage tank 16.Then, in this condition, flow passage selector device 12 switches over, so as to open
Begin to carry out defrosting operating (S4).
If proceeding by defrosting operating, using flow passage selector device 12 as Fig. 1 it is shown in solid switch refrigerant
Stream, play function as condenser so as to identical when heat source side heat exchanger 13 is with cooling operating.Moreover, based on suction
Enter the degree of superheat, the aperture (S5) of control Section 1 stream device 15.Next, it is judged that whether the suction degree of superheat of compressor 11 is more than
Threshold value B (S6).Here, the suction degree of superheat of compressor 11 utilizes side heat exchange as what is detected by outlet temperature sensor 33
The outlet refrigerant temperature of device 17, the utilization entrance refrigerant temperature of side heat exchanger 17 with being detected by inlet temperature sensor 32
Degree difference and obtained.In addition, threshold value B is the value for judging the situation for the suction degree of superheat for being fully applied with compressor 11,
Such as it is set to 5 DEG C.
Then, (the S6 in the case where the suction degree of superheat of compressor 11 is more than threshold value B：It is), Section 2 stream device 18 is beaten
(S7) is opened, also opens open and close valve 19 (S8).Afterwards, based on the suction degree of superheat, control Section 1 stream device 15 and Section 2 stream
The aperture (S9) of device 18, so as to continue defrosting operating.Then, judge whether defrosting operating termination condition sets up (S10),
(the S10 in the case that defrosting operating termination condition is invalid：It is no), continue defrosting operating.Here, using control unit 20,
By being arranged at the hot temperature for handing over temperature sensor 31 to detect of heat source side heat exchanger 13 or being passed by external air temperature
In the case that the temperature that sensor 34 detects is higher than defined temperature (such as 10 DEG C), it is judged as the frost of heat source side heat exchanger 13
It has been melted that, so as to which defrosting operating termination condition is set up.On the other hand, (the S10 in the case where defrosting operating termination condition is set up：
It is), convection current circuit switching device 12 (S11) switches over.Thus, defrosting operating terminates, and starts again at heating operating.
As described above, in the present embodiment, (S1 after condition is set up is started in defrosting operating：It is) and in defrosting operating
Before starting (S4), Section 2 stream device 18 and open and close valve 19 are closed, so as to suppress to be accumulated in the liquid of high pressure storage tank 16
Refrigerant returns liquid towards compressor 11.In addition, the suction degree of superheat in compressor 11 is in the situation of more than threshold value and (located
In not producing back the situation of state of liquid) under, by the way that Section 2 stream device 18 and open and close valve 19 are opened for generally controlling
System, thus allows for defrosting operating.
Fig. 5 is the figure for the refrigerant loop structure for representing the refrigerating circulatory device 200 in existing example.It is as shown in figure 5, existing
Some refrigerating circulatory devices 200 by compressor 1, four-way valve 2, air heat exchanger 3, fan 4, expansion valve 5, high pressure storage tank 6 with
And water heat exchanger 7 is formed.Expansion valve 5 is connected in series between air heat exchanger 3 is exchanged with water device 7, is entered
The decompression for the refrigerant that row flows in refrigerant loop and flow control.In addition, high pressure storage tank 6 be arranged on expansion valve 5 with
Between water heat exchanger 7, residual refrigerant is stockpiled.In the case of the refrigerating circulatory device 200 of the existing example shown in Fig. 5,
If making refrigerant flow path reversion carry out defrosting operating, at the beginning of defrosting operating, the liquid of high pressure storage tank 6 is accumulated in
Refrigerant is flowed by water heat exchanger 7 to compressor 1, so as to produce back liquid.On the other hand, in the present embodiment, such as
It is above-mentioned to possess go back to liquid suppression loop 40 like that, Section 2 stream device 18 and open and close valve 19 are controlled using control unit 20, so as to
Enough suppress back liquid.
Embodiment 2.
Then, embodiment 2 of the present utility model is illustrated.In above-mentioned embodiment 1, be formed as to suppress
The structure returned the generation of liquid and be controlled to Section 2 stream device 18 and open and close valve 19 when defrosting operating starts.Here, no
Only when defrosting operating starts, at the end of defrosting operating, there is also the liquid refrigerant for being accumulated in heat source side heat exchanger 13
Returned to compressor 1 and produce back the situation of liquid.Therefore, in embodiment 2, at the end of defrosting operating to Section 2 stream
On this point device 18 and open and close valve 19 are controlled to suppress back the generation of liquid, it is different from embodiment 1.For this implementation
The refrigerant loop structure and control structure of the refrigerating circulatory device 100 of mode, with the embodiment 1 shown in Fig. 1 and Fig. 2
Refrigerant loop structure and control structure it is identical.
Fig. 4 is the flow chart for representing the flow at the end of the defrosting operating in present embodiment.As shown in figure 4, judge to remove
Whether frost operating termination condition sets up (S21), (S21 in the case where defrosting operating termination condition is invalid：It is no), continue
Defrosting operating is untill defrosting operating termination condition is set up.On the other hand, in the case where defrosting operating termination condition is set up
(S21：It is), open and close valve 19 is closed into (S22), Section 2 stream device 18 is opened into (S23) completely.Thus, in high pressure storage tank 16
Pressure turns into the state of high pressure.Then, in this condition, it is standby untill by the stipulated time (S24).Now, compressor 11
Speed be kept, so as to stockpile the liquid refrigerant of heat source side heat exchanger 13 in high pressure storage tank 16.Then, exist
(S24 in the case of have passed through the stipulated time：It is), convection current circuit switching device 12 switches over, so as to which defrosting operating terminates
(S25).Afterwards, open and close valve 19 is opened into (S26), so as to start again at heating operating.
As described above, in the present embodiment, it is configured to：In the case where the condition that defrosting operating terminates is set up
(S21：It is), and be before defrosting operating terminates (S25), Section 2 stream device 18 is opened, and open and close valve 19 is closed, so as to
The liquid refrigerant for being accumulated in heat source side heat exchanger 13 is stockpiled to high pressure storage tank 16.Thus, at the end of defrosting operating,
The liquid refrigerant for suppressing to be accumulated in heat source side heat exchanger 13 returns the situation of liquid to compressor 11.
Above is the explanation of embodiment of the present utility model, but the utility model is not limited to above-mentioned embodiment
Structure, various modifications or combination can be carried out in the range of its technological thought.For example, in the above-described embodiment, such as Fig. 1
It is shown, possess 1 compressor, 11,1 heat source side heat exchangers 13 to refrigerating circulatory device 100 and 1 utilizes side heat exchange
The situation of device 17 is illustrated, but and is not specially limited their number of units.For example, it is also possible to possesses the compression of more than 2
Machine 11, heat source side heat exchanger 13 and utilization side heat exchanger 17.In addition, in the above-described embodiment, filled with kind of refrigeration cycle
It is that water is cooled down and heated and is carried out in case of generating the air-cooled type heat-pump chiller of cold water and hot water to put 100
Explanation, but this is not limited to, the utility model can also be applied to air-conditioning used in indoor refrigeration and heating
Device.
In addition, in the above-described embodiment, it is configured to be based on by inlet temperature sensor 32 and outlet temperature sensor
33 refrigerant temperatures detected control suck degree of superheat control and degree of subcooling, but are not limited to this, also may be used
Suck degree of superheat control and degree of subcooling control based on other temperature sensors or pressure sensor.Separately
Outside, not only carry out sucking degree of superheat control and degree of subcooling control, can also carry out discharging other controls such as degree of superheat control
System.In addition, defrosting operating starts condition and defrosting operating termination condition is also not limited to described in above-mentioned embodiment
Condition, other conditions can also be used.
In addition, for the control for returning liquid suppression in above-mentioned embodiment 1 and embodiment 2, it can only implement it
In a side, can also implement in addition when defrosting operating starts and at the end of defrosting operating in both.Also, due to possessing
Of the present utility model time liquid suppresses loop 40, even if so as to during beyond in defrosting operating, also can be in low extraneous air
At a temperature of heating (heating) operating at the end of wait, liquid refrigerant be accumulated in the state of heat source side heat exchanger 13, suppress
Issuable time liquid when next time starts.In this case, it is identical with the end of the defrosting operating in embodiment 2, heating
Before the end of operating, Section 2 stream device 18 is opened with open and close valve 19, so as to which the liquid of heat source side heat exchanger 13 will be accumulated in
Cryogen is stockpiled to high pressure storage tank 16.Thus, when starting next time, suppress to be accumulated in the liquid system of heat source side heat exchanger 13
Cryogen returns the situation of liquid to compressor 11.
The explanation of reference
1st, 11... compressors；2... four-way valve；3... air heat exchanger；4th, 14... fans；5... expansion valve；6、
16... high pressure storage tank；7... water heat exchanger；12... flow passage selector device；13... heat source side heat exchanger；14... wind
Fan；15... Section 1 stream device；17... side heat exchanger is utilized；18... Section 2 stream device；19... open and close valve；20... control
Portion processed；31... heat hands over temperature sensor；32... inlet temperature sensor；33... outlet temperature sensor；34... it is outside empty
Gas temperature sensor；40... return liquid and suppress loop；100th, 200... refrigerating circulatory devices.
Claims (5)
1. a kind of refrigerating circulatory device, possesses：
Refrigerant loop, it includes compressor, flow passage selector device, heat source side heat exchanger, Section 1 stream device and utilizes side heat
Exchanger；And
Returning liquid and suppress loop, it is connected in parallel with Section 1 stream device,
The refrigerating circulatory device is characterised by,
Described time liquid, which suppresses loop, includes Section 2 stream device, open and close valve and high pressure storage tank, and the high pressure storage tank is connected to described the
Between 2 throttling arrangements and the open and close valve.
2. refrigerating circulatory device according to claim 1, it is characterised in that
It is also equipped with entering Section 2 stream device and the open and close valve when defrosting operating starts or at the end of defrosting operating
The control unit of row control.
3. refrigerating circulatory device according to claim 2, it is characterised in that
Section 2 stream device and the open and close valve are the parts closed in the case where defrosting operating starts condition establishment,
The flow passage selector device is to start Section 2 stream device and the open and close valve in the case that condition is set up in defrosting operating
It is switched to start the part of the stream of defrosting operating after closing.
4. refrigerating circulatory device according to claim 3, it is characterised in that
Section 2 stream device and the open and close valve are after the defrosting operating is started, in the suction of the compressor
The part that temperature is opened in the case of being more than pre-determined value.
5. the refrigerating circulatory device according to any one of claim 2~4, it is characterised in that
In the case where defrosting operating termination condition is set up, Section 2 stream device is the part opened, and the open and close valve is to close
The part closed, the flow passage selector device are that Section 2 stream device is opened and the open and close valve is closed and is switched to tie afterwards
The part of the stream of beam defrosting operating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/052577 WO2016121068A1 (en) | 2015-01-29 | 2015-01-29 | Refrigeration cycle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207035539U true CN207035539U (en) | 2018-02-23 |
Family
ID=56542719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201590001296.7U Active CN207035539U (en) | 2015-01-29 | 2015-01-29 | Refrigerating circulatory device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3252397B1 (en) |
| JP (1) | JP6257809B2 (en) |
| CN (1) | CN207035539U (en) |
| WO (1) | WO2016121068A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219818A (en) * | 2020-01-17 | 2020-06-02 | 珠海格力电器股份有限公司 | Air conditioning system, air conditioner and control method of air conditioner |
| CN113983710A (en) * | 2021-10-12 | 2022-01-28 | 西安交通大学 | Refrigerant circulation flow self-adaptive adjusting system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3367021B1 (en) * | 2015-10-20 | 2022-02-23 | Mitsubishi Electric Corporation | Refrigeration cycle device |
| CN106403347B (en) * | 2016-11-22 | 2019-01-29 | 广东美的暖通设备有限公司 | Low-temperature air-conditioning system and air-conditioning |
| CN107869864A (en) * | 2017-06-09 | 2018-04-03 | 南京平日制冷科技有限公司 | One kind decompression removes defrosting system |
| EP4276384A4 (en) | 2021-01-05 | 2024-03-06 | Mitsubishi Electric Corp | Refrigeration cycle apparatus |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890004867B1 (en) * | 1985-03-25 | 1989-11-30 | 마쯔시다덴기산교 가부시기가이샤 | Haet pump with a reservoir storing higher pressure refrigerante of non-azeotropic mixture |
| JP2697487B2 (en) * | 1992-05-29 | 1998-01-14 | ダイキン工業株式会社 | Operation control device for refrigeration equipment |
| US7331189B2 (en) * | 2004-11-24 | 2008-02-19 | Hoshizaki Denki Kabushiki Kaisha | Cooling device |
| US9557085B2 (en) * | 2009-07-22 | 2017-01-31 | Mitsubishi Electric Corporation | Heat pump apparatus |
| JP5595140B2 (en) * | 2010-06-24 | 2014-09-24 | 三菱重工業株式会社 | Heat pump type hot water supply / air conditioner |
| JP5973336B2 (en) * | 2012-12-14 | 2016-08-23 | シャープ株式会社 | Air conditioner |
| JP6148001B2 (en) * | 2012-12-14 | 2017-06-14 | シャープ株式会社 | Air conditioner |
-
2015
- 2015-01-29 JP JP2016571610A patent/JP6257809B2/en active Active
- 2015-01-29 WO PCT/JP2015/052577 patent/WO2016121068A1/en active Application Filing
- 2015-01-29 EP EP15879965.0A patent/EP3252397B1/en active Active
- 2015-01-29 CN CN201590001296.7U patent/CN207035539U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219818A (en) * | 2020-01-17 | 2020-06-02 | 珠海格力电器股份有限公司 | Air conditioning system, air conditioner and control method of air conditioner |
| CN111219818B (en) * | 2020-01-17 | 2021-09-03 | 珠海格力电器股份有限公司 | Air conditioning system, air conditioner and control method of air conditioner |
| CN113983710A (en) * | 2021-10-12 | 2022-01-28 | 西安交通大学 | Refrigerant circulation flow self-adaptive adjusting system |
| CN113983710B (en) * | 2021-10-12 | 2022-12-06 | 西安交通大学 | Refrigerant circulation flow self-adaptive adjusting system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2016121068A1 (en) | 2017-07-27 |
| JP6257809B2 (en) | 2018-01-10 |
| WO2016121068A1 (en) | 2016-08-04 |
| EP3252397A1 (en) | 2017-12-06 |
| EP3252397A4 (en) | 2018-10-10 |
| EP3252397B1 (en) | 2022-01-05 |
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