CN109595856A - Heat recovery system and defrosting control method - Google Patents
Heat recovery system and defrosting control method Download PDFInfo
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- CN109595856A CN109595856A CN201811341656.4A CN201811341656A CN109595856A CN 109595856 A CN109595856 A CN 109595856A CN 201811341656 A CN201811341656 A CN 201811341656A CN 109595856 A CN109595856 A CN 109595856A
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- refrigerant flow
- tracheae
- pipeline
- inflow temperature
- solenoid valve
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 238000010257 thawing Methods 0.000 title claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 138
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000005057 refrigeration Methods 0.000 claims description 17
- 238000004781 supercooling Methods 0.000 claims description 15
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 37
- 239000007789 gas Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/025—Liquid transfer means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a heat recovery system and a defrosting control method, which comprise the following steps: the first liquid pipe, the first air pipe and the generator comprise a second pipeline, the first liquid pipe is connected with a first refrigerant flow path and a second refrigerant flow path, the first refrigerant flow path is communicated with the first liquid pipe and the second pipeline through a first valve component, and the second refrigerant flow path is communicated with the first liquid pipe and the first air pipe through a second valve component. Therefore, a proper defrosting mode can be selected, the risk that the pipeline in the unit is frozen due to a low-temperature refrigerant in the defrosting process is reduced, the unit is protected, and the service performance of the unit is improved.
Description
Technical field
The present invention relates to unit fields, in particular to a kind of heat recovery system and defrosting control method.
Background technique
Currently, the principle of hot water generator is, using the heat exchange of refrigerant and water come hot water preparing or cold water.When system defrost
When, the refrigerant pipe temperature of hot water generator is likely to, so as to cause system pipeline icing, it is broken to eventually result in pipeline lower than zero degree
Splitting causes system to intake, and damages unit.To solve this problem, the progress that defrost can be controlled by detection water temperature, works as water temperature
When the risk not frozen, then defrost is carried out, but when water temperature is too low and unit needs defrost, is then unable to satisfy.
Aiming at the problem that carrying out defrost pipeline easy to damage when generator inflow temperature is too low in the related technology, at present not yet
It puts forward effective solutions.
Summary of the invention
A kind of heat recovery system and defrosting control method are provided in the embodiment of the present invention.It can solve and work as hair in the related technology
Raw device inflow temperature carries out the problem of defrost pipeline easy to damage when too low.
In a first aspect, the embodiment of the present invention provides a kind of heat recovery system, comprising: the first liquid pipe, occurs the first tracheae
Device, the generator include the second pipeline,
First liquid pipe, connects the first refrigerant flow and the second refrigerant flow, and first refrigerant flow passes through first
First liquid pipe, second pipeline are connected to by valve module with first tracheae, and second refrigerant flow passes through second
First liquid pipe is connected to by valve module with first tracheae.
Further, first valve module includes: the first electric expansion valve, is set on second pipeline, is located at
The refrigerant exit side of the generator.
Further, first valve module further include: refrigeration solenoid valve is set to second pipeline and described first
Between tracheae.
Further, second valve module includes: supercooling solenoid valve, is set to first liquid pipe and first gas
Between pipe.
Further, the system also includes third tracheae, heating solenoid valve,
The heating solenoid valve is set between the third tracheae and second pipeline.
Further, the system also includes electric heater unit, the electric heater unit be arranged in the generator into
In water lines.
Second aspect, the embodiment of the present invention provide a kind of defrosting control method, and the method is applied to described in first aspect
System in, which comprises
The inflow temperature of detection system；
The refrigerant flow that the system is determined according to the inflow temperature is the first refrigerant flow or the second refrigerant flow.
Further, determine that the refrigerant flow of the system is that the first refrigerant flow or second are cold according to the inflow temperature
Matchmaker's flow path, comprising:
Judge whether the inflow temperature is greater than the first preset threshold；
When the inflow temperature is greater than the first preset threshold, determine that the refrigerant flow of the system is the first refrigerant stream
Road；
When the inflow temperature is less than or equal to the first preset threshold, determine that the refrigerant flow of the system is the second refrigerant
Flow path.
Further, when the inflow temperature is greater than the first preset threshold, determine that the refrigerant flow of the system is the
One refrigerant flow, comprising:
Control the unlatching of the first valve module, heating solenoid valve is closed and the second valve module is closed；
Wherein, first valve module includes: the first electric expansion valve being set on second pipeline, and described first
Electric expansion valve is located at the refrigerant exit side of the generator, and, be set to second pipeline and first tracheae it
Between refrigeration solenoid valve；
Second valve module includes: the supercooling solenoid valve being set between first liquid pipe and first tracheae,
The system also includes third tracheae, the heating solenoid valve is set to the third tracheae and second pipe
Between road.
Further, when the inflow temperature is less than or equal to the first preset threshold, the refrigerant flow of the system is determined
Include: for the second refrigerant flow
Control refrigeration solenoid valve is closed and the second valve module is opened；
Wherein, the refrigeration solenoid valve is set between second pipeline and first tracheae, second valve group
Part includes: the supercooling solenoid valve being set between first liquid pipe and first tracheae.
Further, when the inflow temperature is less than or equal to the first preset threshold, the refrigerant flow of the system is determined
For the second refrigerant flow, comprising:
When the inflow temperature is less than or equal to the first preset threshold, further judge the inflow temperature whether less than the
Two preset thresholds；
If it is not, then the refrigerant flow that the refrigerant flow for determining the system determines when being last defrost.
Further, the method also includes:
If it is, further judging whether the system opens electric heater unit, the electricity is not opened in the system
In the case where heating device, determine that the refrigerant flow of the system is the second refrigerant flow；
Wherein, second preset threshold is less than first preset threshold；The electric heater unit is arranged in the hair
On the inlet pipeline of raw device.
Further, after judging whether the system opens electric heater unit, the method also includes:
In the case where the system opens the electric heater unit, rejudge whether the inflow temperature is greater than first
Preset threshold.
It applies the technical scheme of the present invention, heat recovery system includes: the first liquid pipe, the first tracheae, generator, generator packet
The second pipeline is included, the first liquid pipe connects the first refrigerant flow and the second refrigerant flow, and the first refrigerant flow passes through the first valve module
First liquid pipe, the second pipeline are connected to the first tracheae, the second refrigerant flow passes through the second valve module for the first liquid pipe and first
Tracheae connection.The second refrigerant flow can reduce during defrost, low temperature refrigerant leads to unit without generator as a result,
The risk that interior pipeline freezes improves the service performance of unit to protect unit.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of heat recovery system according to an embodiment of the present invention；
Fig. 2 is a kind of structural block diagram of heat recovery system according to an embodiment of the present invention；
Fig. 3 is a kind of flow chart of defrosting control method according to an embodiment of the present invention；
Fig. 4 is a kind of flow chart of defrosting control method according to an embodiment of the present invention；
Fig. 5 is a kind of flow chart of defrosting control method according to an embodiment of the present invention；
Fig. 6 is a kind of flow chart of defrosting control method according to an embodiment of the present invention.
Specific embodiment
Present invention is further described in detail in the following with reference to the drawings and specific embodiments, it should be understood that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
Be conducive to explanation of the invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
To solve the problems, such as to carry out defrost pipeline easy to damage, such as Fig. 1 when generator inflow temperature is too low in the related technology
Shown, the embodiment of the present invention provides a kind of heat recovery system, and system includes:
First liquid pipe 3, the first tracheae 2, generator 5, generator 5 include the second pipeline 9,
First liquid pipe 3, connects the first refrigerant flow and the second refrigerant flow, and the first refrigerant flow will by the first valve module
First liquid pipe 3, the second pipeline 9 are connected to the first tracheae 2, and the second refrigerant flow is by the second valve module by the first liquid pipe 3 and the
The connection of one tracheae 2.
As a result, when refrigerant flow is the second refrigerant flow, refrigerant does not pass through generator 5 (such as: hot water generator), can
It reduces during defrost, low temperature refrigerant leads to the risk that pipeline freezes in unit, can protect unit, improve the usability of unit
Energy.
It should be noted that system as shown in Figure 1, when it is the second refrigerant flow that refrigerant flow, which has been determined, refrigerant can be through
By the first liquid pipe 3, the first tracheae 2, it is clear that need not move through generator 5, can also reach protection unit, improve making for unit
With the purpose of performance.
In one possible implementation, master controller can determine that the refrigerant flow of system is first according to inflow temperature
Refrigerant flow or the second refrigerant flow.Specifically, when inflow temperature is greater than the first preset threshold, the refrigerant flow of system is determined
For the first refrigerant flow；When inflow temperature is less than or equal to the first preset threshold, determine that the refrigerant flow of system is the second refrigerant
Flow path.
As shown in Figure 1, the first refrigerant flow realizes the first liquid pipe 3 and the second pipeline 9 and the first gas by the first valve module
The connection of pipe 2；Second refrigerant flow realizes the connection of the first liquid pipe 3 and the first tracheae 2 by the second valve module.First valve module
Include: the first electric expansion valve 10, be set on the second pipeline 9, and is located at the refrigerant exit side of generator 5.It will be appreciated that
Refrigerant in second pipeline 9 is gaseous coolant (second be located above in Fig. 1 before flowing through the first electric expansion valve 10
In pipeline 9), after the first electric expansion valve 10, gaseous coolant is converted to liquid refrigerants (underlying second in Fig. 1
In pipeline 9).First valve module further include: refrigeration solenoid valve 7 is set between the second pipeline 9 and the first tracheae 2.Second valve group
Part includes: supercooling solenoid valve 4, is set between the first liquid pipe 3 and the first tracheae 2.System further include: third tracheae 1, heating electricity
Magnet valve 6, heating solenoid valve 6 are set between third tracheae 1 and the second pipeline 9.
Refrigerant flow direction when to above-mentioned two situations does specific introduction, in one possible implementation, by following
Mode realizes the first refrigerant flow: the first electric expansion valve 10 of control is opened, heating solenoid valve 6 is closed, refrigeration solenoid valve 7 is opened
And supercooling solenoid valve 4 is closed；The second refrigerant flow is accomplished by the following way: control supercooling solenoid valve 4 is opened, freeze electromagnetism
Valve 7 is closed.When the solenoid valve 7 that freezes is closed, referring to Fig. 1 it is found that refrigerant can not flow through generator 5, the second refrigerant stream can only be walked
Road, as long as then refrigeration solenoid valve 7 is closed, supercooling solenoid valve 4 is opened, and at heating solenoid valve 6, the first electric expansion valve 10
It can be in the state that opens or closes.
Generator 5 in heat recovery system shown in Fig. 1 can be with hot water generator, but only property is said as an example
It is bright, it will be understood that, generator shown in the present invention is not limited to hot water generator.And mode converter 8 is shown in Fig. 1,
Mode converter 8 can connect indoor unit and outdoor unit, and in heat recovery system shown in Fig. 1, the pipeline of outdoor unit is via mode
After converter 8, become 2 from 3, i.e., draws the second pipeline 9 from the first liquid pipe 3, third tracheae 1 and the first tracheae 2 are distinguished
It is connect with the second pipeline 9.It will be appreciated that mode converter 8 can also be not provided with.
Fig. 2 shows the connection relationship between the pipeline of outdoor unit and the pipeline of mode converter 8 and generator 5, such as Fig. 2
Shown, when system is in refrigeration mode, refrigerant flows out from the exhaust outlet of compressor 14, successively passes through four-way valve 18, condenser
17, enter the first tracheae 2 after heating solenoid valve 15, electric expansion valve 22, using refrigeration solenoid valve 7, the second pipeline 9, first
Electric expansion valve 10, the second pipeline 9 (it will be appreciated that the first electric expansion valve 10 is arranged on the second pipeline 9), the first liquid pipe
3, after electric expansion valve 21, it is back to compressor 14.When system is in heating mode, exhaust outlet stream of the refrigerant from compressor 14
Out, successively by four-way valve 19, electric expansion valve 20, into third tracheae 1, using heating solenoid valve 6, the second pipeline 9, the
After one electric expansion valve 10, the second pipeline 9, the first liquid pipe 3, electric expansion valve 21, compressor 14 is flow back into.Wherein, condenser
Side is provided with blower 16.
Wherein, the first tracheae 2 is low-pressure air pipe, when being that system is in refrigerating state, tracheae that refrigerant flows through.First tracheae
2 air inlet is connect with the exhaust outlet of compressor 14, and the gas outlet of the first tracheae 2 is connect with the air inlet of compressor 14.Third
Tracheae 1 is high-pressure air pipe, when being that system is in heating state, tracheae that refrigerant flows through.The air inlet and compressor of third tracheae 1
14 exhaust outlet connection, the gas outlet of third tracheae 1 is connect with the air inlet of compressor 14.First liquid pipe 3 is that system is in system
When cold state or heating state, refrigerant is both needed to the pipeline flowed through.The air inlet of first liquid pipe 3 and the exhaust outlet of compressor 14 connect
It connects, the gas outlet of the first liquid pipe 3 is connect with the air inlet of compressor 14.
In one possible implementation, as illustrated in fig. 1 and 2, system further include: electric heater unit 13, electric heating dress
13 are set to be arranged on the water inlet pipe 11 of generator 5.Water in water inlet pipe 11 can be heated, to change inflow temperature, in turn
Influence determination of the master controller to refrigerant flow.Wherein, generator 5 shown in FIG. 1 further includes water inlet pipe 11 and outlet pipe 12, electricity
Heating device 13 is arranged on water inlet pipe 11.
In one possible implementation, system further include: heat recovery apparatus (not shown), heat recovery apparatus packet
Include: high-pressure air pipe, low-pressure air pipe and liquid pipe, high-pressure air pipe are connect with third tracheae 1；Low-pressure air pipe is connect with the first tracheae 2；
Liquid pipe is connect with the first liquid pipe 3, and heat recovery apparatus is used for the heat of recovery system.Present invention hot water generator shown in FIG. 1 is
Two pipes system, hot water generator can chilled water or hot water, can lower accepting water case, floor heating, fan coil, regenerative apparatus etc., realize life
Hot water is supplied and meets space heating, refrigeration demand.Wherein, regenerative apparatus is that is, heat recovery apparatus, can be recycled refrigerant stream
Waste heat during dynamic, avoids energy waste, and realize the effective use of the energy.The outer machine of recuperation of heat is three control, mode
The connecting pin of converter and the outer machine of recuperation of heat is three control, is two pipes system with hot water generator connecting pin.
For master controller when determining refrigerant flow is the second refrigerant flow, refrigerant does not pass through generator 5, can reduce as a result,
During defrost, low temperature refrigerant leads to the risk that pipeline freezes in unit, can protect unit, improve the service performance of unit.
Fig. 3 shows a kind of defrosting control method according to an embodiment of the present invention, this method comprises:
Step S101, the inflow temperature of detection system；
Step S102, determine that the refrigerant flow of system is the first refrigerant flow or the second refrigerant flow according to inflow temperature.
Suitable defrost mode can be chosen according to the height of inflow temperature is corresponding as a result, reduce low temperature during defrost
Refrigerant leads to the risk that pipeline freezes in unit, can protect unit, improve the service performance of unit.
In one possible implementation, as shown in figure 4, step S102, determining according to inflow temperature the refrigerant of system
Flow path is the first refrigerant flow or the second refrigerant flow, comprising:
Step S1021, judge whether inflow temperature is greater than the first preset threshold；
Step S1022, when inflow temperature is greater than the first preset threshold, determine that the refrigerant flow of system is the first refrigerant stream
Road；
Step S1023, when inflow temperature is less than or equal to the first preset threshold, determine that the refrigerant flow of system is second cold
Matchmaker's flow path.
Wherein, the first preset threshold is equivalent to default water temperature safety value, when water temperature is greater than the first preset threshold, illustrates this
When water temperature there is no risk of icing, then normal defrost process can be used, by taking system shown in Figure 1 as an example, i.e., control model convert
Corresponding solenoid valve switches to refrigerating state in device, while the first electric expansion valve for controlling hot water generator opens certain step
Number, makes refrigerant exchange heat normal through hot water generator, so that unit defrost.And when inflow temperature is less than or equal to the first preset threshold
When, illustrating unit, there may be risk of icing, it is determined that it is the second refrigerant flow that the refrigerant of unit, which flows through path, can avoid hot water
The pipeline of generator freezes, and avoids damage unit.
In one possible implementation, when inflow temperature is greater than the first preset threshold, the refrigerant stream of system is determined
Road is the first refrigerant flow, comprising: the first valve module of control is opened, heating solenoid valve is closed and the second valve module is closed.?
When inflow temperature is less than or equal to the first preset threshold, it includes: control refrigeration that the refrigerant flow for determining system, which is the second refrigerant flow,
Solenoid valve is closed and the second valve module is opened；Wherein, the first valve module includes: the first electric expansion valve, is set to the second pipe
On the road, positioned at the refrigerant exit side of the second pipeline, and, the refrigeration solenoid valve being set between the second pipeline and the first tracheae.
Second valve module includes: the supercooling solenoid valve being set between the first liquid pipe and the first tracheae.Heating solenoid valve is set to third
Between tracheae and the second pipeline.Referring to Fig. 1 it is found that refrigerant can not flow through generator, the second refrigerant flow can only be walked, as long as then making
Cold solenoid valve is closed, supercooling solenoid valve is opened, and heating solenoid valve, the first electric expansion valve are on or off
It can be with.
In one possible implementation, as shown in figure 5, step S1023, in inflow temperature to be less than or equal to first default
When threshold value, determine that the refrigerant flow of system is the second refrigerant flow, comprising:
Step S301, when inflow temperature is less than or equal to the first preset threshold, further judge whether inflow temperature is less than
Second preset threshold；If not, thening follow the steps S302；If so, thening follow the steps S303；
Step S302, the refrigerant flow that the refrigerant flow for then determining system determines when being last defrost；
Step S303, then further to judge whether system opens electric heater unit, electric heater unit is not opened in system
In the case of, determine that the refrigerant flow of system is the second refrigerant flow；
Wherein, the second preset threshold is less than the first preset threshold；Electric heater unit is arranged on the inlet pipeline of generator.
As a result, when inflow temperature is less than the second preset threshold (can be regarded as another default water temperature secure threshold), explanation
There may be risk of icing during defrost.If continuing to use normally by control model converter for refrigerating state
Defrost mode (i.e. the first refrigerant flow), then the inflow temperature that will lead to hot water generator further decreases.In order to avoid this
Situation, the embodiment of the present invention provide two kinds of preferred settling modes, i.e., first judge whether system opens electric heating, open in system
In electrically heated situation, inflow temperature can be gradually risen, and can be rejudged inflow temperature and whether be greater than the first preset threshold, and according to
Refrigerant flow is determined according to inflow temperature.And if system does not open electric heating, the refrigerant flow that can directly determine system is
Second refrigerant path, and can control supercooling solenoid valve and be opened into suitable aperture, heating solenoid valve closing, refrigeration solenoid valve closing
And first electric expansion valve close (also can control supercooling solenoid valve be opened into suitable aperture, only control refrigeration solenoid valve close
Close), when cold flow is through supercooling solenoid valve as a result, can exchange heat with the refrigerant in the first liquid pipe is subcooled the refrigerant in the first liquid pipe.
Refrigerant can be prevented to flow to hot water generator, avoid exchanging heat with the water in hot water generator.So that having knot water temperature is lower
When ice risk, another defrost mode is taken to protect unit while reaching defrosting effect.
In one possible implementation, after judging whether system opens electric heater unit, method further include:
In the case that system opens electric heater unit, rejudge whether inflow temperature is greater than the first preset threshold.
Fig. 6 shows a kind of defrosting control method according to an embodiment of the present invention, this method comprises:
Step S401, unit enters defrost state；
Step S402, the inflow temperature of hot water generator is detected；
Step S403, do you judge inflow temperature > a? if so, thening follow the steps S404；If not, thening follow the steps S405；
Step S404, the first is controlled；
Wherein, corresponding the first refrigerant path with above-mentioned implementation of the first control；
Step S405, inflow temperature <b? if so, thening follow the steps S406；If not, thening follow the steps S407；
Step S406, it is there electric heating? if so, thening follow the steps S408；If not, thening follow the steps S409；
Step S407, it is controlled according to last state；
Step S408, electric heating is opened；Step S403 is executed afterwards；
Step S409, it is controlled into second；
Wherein, corresponding the second refrigerant path with above-mentioned implementation of second of control.
Suitable defrost mode can be chosen according to the height of inflow temperature is corresponding as a result, reduce low temperature during defrost
Refrigerant leads to the risk that pipeline freezes in unit, can protect unit, improve the service performance of unit.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a mobile terminal (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described above in conjunction with figure, but the invention is not limited to above-mentioned specific realities
Mode is applied, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art exist
Under enlightenment of the invention, without breaking away from the scope protected by the purposes and claims of the present invention, many shapes can be also made
Formula, all of these belong to the protection of the present invention.
Claims (15)
1. a kind of heat recovery system characterized by comprising the first liquid pipe, the first tracheae, generator, the generator include
Second pipeline,
First liquid pipe, connects the first refrigerant flow and the second refrigerant flow, and first refrigerant flow passes through the first valve group
First liquid pipe, second pipeline are connected to by part with first tracheae, and second refrigerant flow passes through the second valve group
First liquid pipe is connected to by part with first tracheae.
2. system according to claim 1, which is characterized in that
First valve module includes: the first electric expansion valve, is set on second pipeline, positioned at the cold of the generator
Matchmaker's outlet side.
3. system according to claim 2, which is characterized in that
First valve module further include: refrigeration solenoid valve is set between second pipeline and first tracheae.
4. system according to claim 1, which is characterized in that
Second valve module includes: supercooling solenoid valve, is set between first liquid pipe and first tracheae.
5. system according to claim 1, which is characterized in that the system also includes: third tracheae, heating solenoid valve,
The heating solenoid valve is set between the third tracheae and second pipeline.
6. system according to claim 1, which is characterized in that the system also includes: electric heater unit, the electric heating
Device is arranged on the inlet pipeline of the generator.
7. a kind of defrosting control method, which is characterized in that the method is applied to power 1 into the system of any one of power 6, institute
The method of stating includes:
The inflow temperature of detection system；
The refrigerant flow that the system is determined according to the inflow temperature is the first refrigerant flow or the second refrigerant flow.
8. the method according to the description of claim 7 is characterized in that determining the refrigerant stream of the system according to the inflow temperature
Road is the first refrigerant flow or the second refrigerant flow, comprising:
Judge whether the inflow temperature is greater than the first preset threshold；
When the inflow temperature is greater than the first preset threshold, determine that the refrigerant flow of the system is the first refrigerant flow；
When the inflow temperature is less than or equal to the first preset threshold, determine that the refrigerant flow of the system is the second refrigerant stream
Road.
9. according to the method described in claim 8, it is characterized in that, the inflow temperature be greater than the first preset threshold when, really
The refrigerant flow of the fixed system is the first refrigerant flow, comprising:
Control the unlatching of the first valve module, heating solenoid valve is closed and the second valve module is closed；
Wherein, first valve module includes: the first electric expansion valve being set on second pipeline, first electronics
Expansion valve is located at the refrigerant exit side of the generator, and, it is set between second pipeline and first tracheae
Freeze solenoid valve；
Second valve module includes: the supercooling solenoid valve being set between first liquid pipe and first tracheae,
The system also includes third tracheae, the heating solenoid valve, be set to the third tracheae and second pipeline it
Between.
10. according to the method described in claim 8, it is characterized in that, being less than or equal to the first preset threshold in the inflow temperature
When, determine that the refrigerant flow of the system is that the second refrigerant flow includes:
Control refrigeration solenoid valve is closed and the second valve module is opened；
Wherein, the refrigeration solenoid valve is set between second pipeline and first tracheae；
Second valve module includes: the supercooling solenoid valve being set between first liquid pipe and first tracheae.
11. according to the method described in claim 8, it is characterized in that, being less than or equal to the first preset threshold in the inflow temperature
When, determine that the refrigerant flow of the system is the second refrigerant flow, comprising:
When the inflow temperature is less than or equal to the first preset threshold, further judge whether the inflow temperature is pre- less than second
If threshold value；
If it is not, then the refrigerant flow that the refrigerant flow for determining the system determines when being last defrost.
12. according to the method for claim 11, which is characterized in that the method also includes:
If it is, further judging whether the system opens electric heater unit, the electric heating is not opened in the system
In the case where device, determine that the refrigerant flow of the system is the second refrigerant flow；
Wherein, second preset threshold is less than first preset threshold；The electric heater unit is arranged in the generator
Inlet pipeline on.
13. according to the method for claim 12, which is characterized in that judge the system whether open electric heater unit it
Afterwards, the method also includes:
In the case where the system opens the electric heater unit, rejudging the inflow temperature, whether to be greater than first default
Threshold value.
14. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor is realized as described in any one of claim 7 to 13 when executing described program
Defrosting control method.
15. a kind of storage medium comprising computer executable instructions, the computer executable instructions are by computer disposal
For executing the defrosting control method as described in any one of claim 7 to 13 when device executes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811341656.4A CN109595856B (en) | 2018-11-12 | 2018-11-12 | Heat recovery system and defrosting control method |
| PCT/CN2018/121907 WO2020098057A1 (en) | 2018-11-12 | 2018-12-19 | Heat recovery system and defrosting control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811341656.4A CN109595856B (en) | 2018-11-12 | 2018-11-12 | Heat recovery system and defrosting control method |
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| Publication Number | Publication Date |
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| CN109595856A true CN109595856A (en) | 2019-04-09 |
| CN109595856B CN109595856B (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811341656.4A Active CN109595856B (en) | 2018-11-12 | 2018-11-12 | Heat recovery system and defrosting control method |
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| Country | Link |
|---|---|
| CN (1) | CN109595856B (en) |
| WO (1) | WO2020098057A1 (en) |
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| JPS6414569A (en) * | 1987-07-08 | 1989-01-18 | Toshiba Corp | Air-conditioning machine |
| CN203349585U (en) * | 2013-05-21 | 2013-12-18 | 康特能源科技(苏州)有限公司 | Anti-icing defrosting device |
| CN203478621U (en) * | 2013-08-13 | 2014-03-12 | 江苏天舒电器有限公司 | Anti-frozen controller used in heat pump water heater |
| CN105135689B (en) * | 2015-09-25 | 2018-04-06 | 广东美的暖通设备有限公司 | The antifreeze pre-warning and control method of circulation hot water dispenser and device |
| CN105865024B (en) * | 2016-04-26 | 2018-10-16 | 广东美的暖通设备有限公司 | Heat pump water-heating machine and its defrosting control method and device |
| CN106642586B (en) * | 2016-12-29 | 2019-09-17 | 广东美的暖通设备有限公司 | A kind of classification defrosting method and device for air-cooled heat pump Parallel sets |
| CN108375145A (en) * | 2018-01-26 | 2018-08-07 | 青岛海尔空调电子有限公司 | A kind of heat pump system and its defrosting control method |
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- 2018-12-19 WO PCT/CN2018/121907 patent/WO2020098057A1/en active Application Filing
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|---|---|---|---|---|
| JP2012007800A (en) * | 2010-06-24 | 2012-01-12 | Mitsubishi Heavy Ind Ltd | Heat pump type hot-water supply and air-conditioning system |
| CN102759193A (en) * | 2012-08-02 | 2012-10-31 | 广州星辰热能科技有限公司 | Air source heat pump system |
| CN103644690A (en) * | 2013-12-02 | 2014-03-19 | 陈志强 | Air-source heat pump defrosting system |
| CN205980489U (en) * | 2016-08-15 | 2017-02-22 | 韦超旺 | Energy -saving hot vapour defrosting system of air -source heat bump water heater |
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| Publication number | Publication date |
|---|---|
| CN109595856B (en) | 2020-01-17 |
| WO2020098057A1 (en) | 2020-05-22 |
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