CN106949666A - Heat pump and its control method - Google Patents
Heat pump and its control method Download PDFInfo
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- CN106949666A CN106949666A CN201710333898.8A CN201710333898A CN106949666A CN 106949666 A CN106949666 A CN 106949666A CN 201710333898 A CN201710333898 A CN 201710333898A CN 106949666 A CN106949666 A CN 106949666A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003507 refrigerant Substances 0.000 claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 7
- 230000000052 comparative effect Effects 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001932 seasonal effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 river Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000008054 signal transmission Effects 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a kind of heat pump, including refrigerant loop and at least one Secondary Heat Source loop, Secondary Heat Source loop is used to carry out heat exchange with refrigerant loop, refrigerant loop includes the first thermal source heat exchanger, Secondary Heat Source heat exchanger and user side heat exchanger, first thermal source heat exchanger is air source heat exchanger, first thermal source heat exchanger and Secondary Heat Source heat exchanger are in parallel, and the first thermal source heat exchanger and Secondary Heat Source heat exchanger are connected with user side heat exchanger respectively.The heat pump that the present invention is provided, can switch to meet the temperature adjustment demand of user according to many set thermals source of selection the need for different environment and user or more between set thermal source.Especially northerly winter, the mode being combined using air heat source and other thermals source is formed compound heat supply, the low-temperature heat source of diversified forms can be added in the heating demand of air heat source, improves the heat capacity and operation stability of source pump.The present invention also provides a kind of heat pump control method.
Description
Technical field
The present invention relates to heating equipment technical field, more particularly to a kind of heat pump and its control method.
Background technology
Air source heat pump as one kind using air as low-temperature heat source, will be low in air by a small amount of high-order electrical energy drive
Position heat energy lifts into the device that high level heat is used, and is considered as to reduce the features such as environment friendly and pollution-free with energy-efficient
CO2 is discharged and reduced to fossil fuel dependence degree most development potentiality heating equipment.Air source heat pump is in environment temperature phase
To it is higher when, runnability is good, but in the case of outdoor environment is relatively low, what heat pump can not be efficient, reliable, stable
Operation.The northern area of China, temperature is greatly reduced in the winter time, and day and night temperature is larger, and have impact on air source heat pump heats energy
Power is exported, and also constrains the northerly application of air source heat pump.
In addition, as water or soil is used alone as thermal source, the temperature of thermal source can also be affected by the climate, so as to influence
The heating efficiency of heat pump.
The content of the invention
Have in view of that, the present invention provides a kind of heat pump and its control method, to solve to ask present in prior art
Topic.
According to the first aspect of the invention there is provided a kind of heat pump, including refrigerant loop and at least one second heat
Resource loop, the Secondary Heat Source loop is used to carry out heat exchange with the refrigerant loop, and the refrigerant loop includes the
One thermal source heat exchanger, Secondary Heat Source heat exchanger and user side heat exchanger, the first thermal source heat exchanger are air source heat exchanger, institute
State the first thermal source heat exchanger and Secondary Heat Source heat exchanger in parallel, the first thermal source heat exchanger and Secondary Heat Source heat exchanger respectively with
The user side heat exchanger series connection,
The refrigerant loop carries out heat exchange through the first thermal source heat exchanger and outdoor air, through the described second heat
Source heat exchanger carries out heat exchange with the Secondary Heat Source loop, and carries out heat through the user side heat exchanger and room air
Exchange.
Preferably, the refrigerant loop also includes compressor, four-way reversing valve, the first expansion valve and the second expansion valve,
The air inlet of the compressor is connected with the 4th port of the four-way reversing valve, and gas outlet is commutated with the four-way
The 3rd port connection of valve, the first port of the four-way reversing valve respectively with the second port of the first thermal source heat exchanger and
The second port connection of first group of port of Secondary Heat Source heat exchanger, the first end of first group of port of the user side heat exchanger
Mouthful it is connected with the second port of the four-way reversing valve, the second port of first group of port of the user side heat exchanger is divided into the
One branch road and the second branch road, the tie point are connected with the first port of the first thermal source heat exchanger, second branch road
It is connected with the first port of first group of port of the Secondary Heat Source heat exchanger,
First expansion valve is connected in the tie point, and second expansion valve is connected to second branch road
On.
Preferably, the operation of the heat pump includes refrigeration mode and heating mode,
Wherein, in a heating mode, the first port of the four-way reversing valve is connected with the 4th port, second port and
Three ports are connected；
In cooling mode, the first port of the four-way reversing valve is connected with the 3rd port, second port and the 4th end
Mouth connection.
Preferably, the refrigerant loop also includes fan, and the fan is located at the side of the first thermal source heat exchanger,
For air to be blowed into the first thermal source heat exchanger.
Preferably, the first temperature monitor, the second end are connected with the air inlet port of the first thermal source heat exchanger
Second temperature detector is connected with mouthful,
The second port of first group of port of the Secondary Heat Source heat exchanger is provided with the 4th temperature monitor.
Preferably, the Secondary Heat Source loop also includes the first working medium pump and underground pipe, and the underground pipe is embedded in soil,
For absorbing the heat in soil,
The suction inlet of first working medium pump is connected with the first port of the underground pipe, and mouth and institute are arranged outside the working medium pump
State the first port connection of second group of port of Secondary Heat Source heat exchanger, the of second group of port of the Secondary Heat Source heat exchanger
Two-port netwerk is connected with the second port of the underground pipe.
Preferably, the outer row mouthful of first working medium pump and the first end of second group of port of the Secondary Heat Source heat exchanger
The 3rd temperature monitor is connected between mouthful.
Preferably, also including user side heat exchange loop, the user side heat exchange loop includes the second working medium pump and end
Heat exchanger is held, and heat exchange is carried out through the user side heat exchanger and coolant circuit,
Wherein, the suction inlet of second working medium pump is connected with the second port of the terminal heat exchanger, outer row mouthful and institute
State the second port connection of second group of port of user side heat exchanger, the first end of second group of port of the user side heat exchanger
Mouth is connected with the first port of the terminal heat exchanger.
According to the second aspect of the invention there is provided a kind of control method of heat pump, including：
The exchange rate between the first thermal source and refrigerant loop, and Secondary Heat Source and refrigerant loop are obtained respectively
Between exchange rate, wherein the first thermal source be air-source thermal source；
According to the exchange rate between acquired first thermal source and refrigerant loop, and the Secondary Heat Source
Exchange rate between refrigerant loop, judges to enable at least one in the first thermal source and Secondary Heat Source and user
Side carries out heat exchange.
Preferably, the exchange rate obtained between the first thermal source and refrigerant loop includes：
Detect the inlet air temp T of the air inlet port of the first thermal source heat exchanger1And refrigerant exit temperature
T2, measure the heat exchange efficiency coefficient ε of the first thermal source heat exchangera, and detect the air for flowing through the first thermal source heat exchanger
Flow Ga,
According to formula Qa=Ga·Ca·εa·|T1-T2|, calculate the heat exchange rate Q of the first thermal source heat exchangera, wherein, CaFor
Air specific heat capacity.
Preferably, the exchange rate between the detection Secondary Heat Source and refrigerant loop includes：
Detect the working medium entrances temperature T of Secondary Heat Source heat exchanger3With refrigerant exit temperature T4, measure the Secondary Heat Source
The heat exchange efficiency coefficient ε of heat exchangers, and detect the working medium flow G for flowing through Secondary Heat Source heat exchangers,
According to formula Qs=Gs·Cs·εs·|T3-T4|, calculate the heat exchange rate Q of the second heat exchangers, wherein, CsFor second
The specific heat capacity of thermal source heat exchanger working medium.
Preferably, according to the exchange rate between acquired first thermal source and refrigerant loop, and it is described
Exchange rate between Secondary Heat Source and refrigerant loop, judge enable in the first thermal source and Secondary Heat Source at least within it
One includes：
By the exchange rate between acquired first thermal source and refrigerant loop, and the Secondary Heat Source with
The value of exchange rate between refrigerant loop is selected compared with the preset temperature value of user side, and according to comparative result determination
At least one of first thermal source and Secondary Heat Source are enabled, with user side carry out heat exchange, with user's request phase
Match somebody with somebody.
The heat pump that the present invention is provided, can be according to different environment and user the need for, the ground such as the South and the North
Area's difference, and seasonal variations etc., selection to be covered the switching between thermals source or many set thermals source to meet the temperature adjustment of user
Demand.Especially northerly winter, the mode being combined using air heat source and other thermals source is formed compound thermal source and supplied
The low-temperature heat source of diversified forms, can be added in the heating demand of air heat source by heat, improve the heat capacity of source pump
And operation stability.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described.In all of the figs, similar element
Or part is general by similar reference mark.In accompanying drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 shows the structural representation of heat pump according to embodiments of the present invention；
Fig. 2 shows the flow chart of the control method of heat pump according to embodiments of the present invention.
In figure：First thermal source heat exchanger 1, Secondary Heat Source heat exchanger 2, user side heat exchanger 3, compression 4, four-way reversing valve 5,
First expansion valve 61, the second expansion valve 62, fan 7, the first temperature monitor 81, second temperature detector 82, the inspection of the 3rd temperature
Survey instrument 83, the 4th temperature monitor 84, the first working medium pump 91, the second working medium pump 92, terminal heat exchanger 10, soil 100, underground pipe
1。
Embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with accompanying drawing.Following examples are only used for
Clearly illustrate technical scheme, therefore be only used as example, and the protection model of the present invention can not be limited with this
Enclose.
Fig. 1 shows the structural representation of heat pump according to embodiments of the present invention.As shown in figure 1, the heat pump bag
Refrigerant loop and at least one Secondary Heat Source loop are included, the Secondary Heat Source loop is used to carry out heat with the refrigerant loop
Amount is exchanged, and the refrigerant loop includes the first thermal source heat exchanger 1, Secondary Heat Source heat exchanger 2 and user side heat exchanger 3, described
First thermal source heat exchanger 1 is air source heat exchanger, and the first thermal source heat exchanger 1 and Secondary Heat Source heat exchanger 2 are in parallel, described the
One thermal source heat exchanger 1 and Secondary Heat Source heat exchanger 2 are connected with the user side heat exchanger 3 respectively.
The refrigerant loop carries out heat exchange through the first thermal source heat exchanger 1 and outdoor air, through described second
Thermal source heat exchanger 2 carries out heat exchange with the Secondary Heat Source loop, and is carried out through the user side heat exchanger 3 and room air
Heat exchange.
The refrigerant loop also includes compressor 4, four-way reversing valve 5, the first expansion valve 61 and the second expansion valve 62.Its
In, the air inlet of the compressor 4 is connected with the 4th port of the four-way reversing valve 5, gas outlet and the four-way reversing valve 5
The 3rd port connection.The first port of the four-way reversing valve 5 respectively with the second port of the first thermal source heat exchanger 1 and
The second port connection of first group of port of Secondary Heat Source heat exchanger 2, the first of first group of port of the user side heat exchanger 3
Port is connected with the second port of the four-way reversing valve 5.The second port of first group of port of the user side heat exchanger 3 point
Into tie point and the second branch road, the tie point is connected with the first port of the first thermal source heat exchanger 1, and described second
Branch road is connected with the first port of first group of port of the Secondary Heat Source heat exchanger 2.First expansion valve 61 is connected to institute
State in tie point, second expansion valve 62 is connected on second branch road.First group of port of user side heat exchanger 3,
And first group of port of Secondary Heat Source heat exchanger 2 is used to connect refrigerant line.
The operation of the heat pump includes refrigeration mode and heating mode.Wherein, in a heating mode, the four-way is changed
Connected to the first port of valve 5 with the 4th port, second port is connected with the 3rd port；In cooling mode, the four-way is changed
Connected to the first port of valve 5 with the 3rd port, second port is connected with the 4th port.
The refrigerant loop also includes fan 7, and the fan 7 is located at the side of the first thermal source heat exchanger 1, is used for
Air is blowed into the first thermal source heat exchanger 1.
It is connected with the air inlet port of the first thermal source heat exchanger 1 in the first temperature monitor 81, second port
Second temperature detector 82 is connected with, the second port of first group of port of the Secondary Heat Source heat exchanger 2 is provided with the 4th temperature
Spend detector 84.Wherein, the first temperature monitor 81 is used to detect the air at the air inlet port of the first thermal source heat exchanger 1
Inlet temperature T1, refrigerant exit temperature T of the second temperature detector 82 for detecting the first thermal source heat exchanger 12, the 3rd temperature
Detector 83 is used for the working medium entrances temperature T for detecting Secondary Heat Source heat exchanger 23, the 4th temperature monitor 84 is for detecting second
The refrigerant exit temperature T of thermal source heat exchanger 24。
The Secondary Heat Source in Secondary Heat Source loop can be remaining for such as soil 100, underground water, seawater, river, sewage, industry
Heat, solar energy, wind electricity digestion heat storage boiler etc. are any or several can to provide the thermal source of heat energy.In the embodiment, second
Thermal source elects soil 100 as.
The Secondary Heat Source loop also includes the first working medium pump 91 and underground pipe 11, and the underground pipe 11 is embedded in soil 100
In, for absorbing the heat in soil 100.The first port of the suction inlet of first working medium pump 91 and the underground pipe 11 connects
Connect, mouth is arranged outside the working medium pump and is connected with the first port of second group of port of the Secondary Heat Source heat exchanger 2, second heat
The second port of second group of port of source heat exchanger 2 is connected with the second port of the underground pipe 11.Secondary Heat Source heat exchanger 2
Second group of port is used to connect the working medium pipeline in Secondary Heat Source loop.
Further, also including user side heat exchange loop, the user side heat exchange loop includes the second working medium pump 92
With terminal heat exchanger 10, and heat exchange is carried out through the user side heat exchanger 3 and coolant circuit.
Wherein, the suction inlet of second working medium pump 92 is connected with the second port of the terminal heat exchanger 10, outer row mouthful
It is connected with the second port of second group of port of the user side heat exchanger 3, second group of port of the user side heat exchanger 3
First port is connected with the first port of the terminal heat exchanger 10.Terminal heat exchanger 10 can be, located at indoor evaporator, to use
In by the heat transfer from the first thermal source and Secondary Heat Source to interior, or by indoor heat exchange to outdoor.It is described to use
Second group of port of family side heat exchanger 3 is used for the working medium pipeline for connecting user side heat exchange loop.
In the embodiment, the refrigerant in refrigerant loop elects freon, Secondary Heat Source loop and user side heat exchange as
Working medium in loop elects water or anti-icing fluid as.Connected between each fluid component by pipeline.
Heat pump in the embodiment, with refrigeration mode and heating mode.Its heating mode is carried out first detailed
Introduce.
Heating mode：
In this mode, the first port of the four-way reversing valve 5 is connected with the 4th port, second port and the 3rd port
Connection.Direction shown in refrigerant along arrow in Fig. 1 is flowed, and the cold-producing medium stream after compressor 4 compresses 4 exchanges heat through user side
Device 3, then flows separately through the first thermal source heat exchanger 1 and Secondary Heat Source heat exchanger 2, and flow back to compressor 4 through four-way reversing valve 5.
When flowing through the first thermal source heat exchanger 1, the air inlet port of outdoor air from the first thermal source heat exchanger 1 is blown into by fan 7
One thermal source heat exchanger 1, air carries out heat exchange with refrigerant and heat is reached into refrigerant.Meanwhile, the first working medium pump 91 starts,
Working medium is circulated in Secondary Heat Source loop, by the heat absorption in soil 100 into working medium, flows through Secondary Heat Source heat exchanger 2
Working medium and the refrigerant progress heat exchange for flowing through Secondary Heat Source heat exchanger 2, refrigerant is reached by heat.Absorption air and soil
The refrigerant after heat in 100 is back to compressor 4, and after the acting of compressor 4 compression 4, temperature is further improved, Ran Houliu
Through user side heat exchanger 3, heat is reached to the working medium flowed through in user side heat exchange loop, and finally reaches evaporator, and is passed through
Evaporator reaches interior.It during being somebody's turn to do, can also start fan 7, and close Secondary Heat Source loop, it is merely with the first thermal source, i.e., empty
Gas carries out heat exchange；Or fan 7 is closed, and start Secondary Heat Source loop, carried out merely with Secondary Heat Source, i.e. soil 100
Heat exchange.Concrete condition, can be according to user's request depending on.
Refrigeration mode：
In this mode, the first port of the four-way reversing valve 5 is connected with the 3rd port, second port and the 4th port
Connection.Flow direction when refrigerant and heating mode is on the contrary, reverse flow shown in arrow in figure, by the heat of interior
Amount reaches at least one in outdoor air and soil 100.The specific mobility status of refrigerant can contrast retouching for heating mode
State, here is omitted.
The present invention also provides a kind of control method of the heat pump.As shown in Fig. 2 comprising the following steps：
S01 the exchange rate between the first thermal source and refrigerant loop, and Secondary Heat Source and refrigeration), are obtained respectively
Exchange rate between agent loop, wherein the first thermal source is air-source thermal source.
After the heat pump completes, by the local heat transfer under serial operating mode, the first thermal source heat exchanger 1 is determined respectively
Relation curve between coefficient of thermal efficiency and the rotating speed of fan 7 and the rotating speed of compressor 4, referred to herein as the first relation curve.And the
Relation curve between the heat exchange efficiency coefficient and the rotating speed of the first working medium pump 91 and the rotating speed of compressor 4 of two thermal source heat exchangers 2, herein
Referred to as the second relation curve.The first relation curve and the second relation curve of acquisition are recorded in memory.
First temperature monitor 81 detects the inlet air temp of the air inlet port of the first thermal source heat exchanger 1
T1, the detection refrigerant exit temperature of second temperature detector 82 T2, the 3rd temperature monitor 83 detection Secondary Heat Source heat exchanger 2
Working medium entrances temperature T3, the 4th temperature monitor 84 detection refrigerant exit temperature T4.Each temperature monitor is by the temperature detected
Signal transmission is spent to controller.
Meanwhile, measure the heat exchange efficiency coefficient ε of the Secondary Heat Source heat exchanger 2s, and detect that flowing through Secondary Heat Source exchanges heat
The working medium flow G of device 2s.Measure the heat exchange efficiency coefficient ε of the first thermal source heat exchanger 1a, and detection flow through it is described first heat
The air mass flow G of source heat exchanger 1a。
Controller calculates temperature difference after receiving the temperature signal that each temperature monitor is sent
ΔT1=| T2-T1| and Δ T2=| T4-T3|, then read the first relation curve of record and second in memory and close
It is curve, according to the detection temperature difference, heat exchange efficiency coefficient εa, air mass flow Ga, working medium flow Gs, air specific heat capacity CaWith working medium ratio
Thermal capacitance CsCalculate respectively under corresponding operating mode, the refrigerant unit in the first thermal source heat exchanger 1 and Secondary Heat Source heat exchanger 2 respectively
Time retrievable heat, that is, calculate the exchange rate Q between the first thermal source and refrigerant loopa, and Secondary Heat Source with
Exchange rate Q between refrigerant loops.Computing formula is as follows：
Qa=Ga·Ca·εa·ΔT1 (1)
Qs=Gs·Cs·εs·ΔT2 (2)
S02), according to the exchange rate between acquired first heat source loop and refrigerant loop, Yi Jisuo
The exchange rate between Secondary Heat Source and refrigerant loop is stated, judgement is enabled in the first thermal source and Secondary Heat Source at least within
One of with user side carry out heat exchange.
Specifically, controller is by the exchange rate between acquired first thermal source and refrigerant loop, and
The value of exchange rate of the Secondary Heat Source between refrigerant loop compared with the preset temperature value of user side, and according to
Comparative result determines that at least one for selecting first thermal source and Secondary Heat Source is enabled, and heat exchange is carried out with user side, with
Match with user's request.
When heat demand is larger indoors, while opening Secondary Heat Source loop, and starts fan 7, utilize air and soil
100 two thermals source are heated to refrigerant, and most heat reaches the interior of user side at last, and indoor temperature is adjusted.
When user side heat needs smaller, one of first thermal source can be selected and carry out heat exchange, so as to be carried out to indoor temperature
Regulation.Now, it is only necessary to corresponding closing fan 7 or Secondary Heat Source loop.Controller switches between singly set mode of operation
During, it is also considered that the unit interval operation cost of two sets of heat source loops.
Heat pump in the application, can be according to different environment and user the need for, the area such as the South and the North
Difference, and seasonal variations etc., selection to be covered the switching between thermals source or many set thermals source to meet the temperature adjustment need of user
Ask.Especially northerly winter, the mode being combined using air heat source and other thermals source forms compound heat supply,
The low-temperature heat source of diversified forms can be added in the heating demand of air heat source, improve the heat capacity and fortune of source pump
Row stability.
It should be noted that unless otherwise indicated, technical term or scientific terminology used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important
Property or the implicit quantity for indicating indicated technical characteristic.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In this application, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In this application, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it all should cover among the claim of the present invention and the scope of specification.Especially, as long as in the absence of knot
Structure conflicts, and the every technical characteristic being previously mentioned in each embodiment can combine in any way.The present invention does not limit to
In specific embodiment disclosed herein, but all technical schemes including falling within the scope of the appended claims.
Claims (12)
1. a kind of heat pump, it is characterised in that including refrigerant loop and at least one Secondary Heat Source loop, second heat
Resource loop is used to carry out heat exchange with the refrigerant loop, and the refrigerant loop includes the first thermal source heat exchanger, second
Thermal source heat exchanger and user side heat exchanger, the first thermal source heat exchanger are air source heat exchanger, the first thermal source heat exchanger
It is in parallel with Secondary Heat Source heat exchanger, the first thermal source heat exchanger and Secondary Heat Source heat exchanger respectively with the user side heat exchanger
Series connection,
The refrigerant loop carries out heat exchange through the first thermal source heat exchanger and outdoor air, is changed through the Secondary Heat Source
Hot device carries out heat exchange with the Secondary Heat Source loop, and carries out heat friendship through the user side heat exchanger and room air
Change.
2. heat pump according to claim 1, it is characterised in that the refrigerant loop also includes compressor, four-way
Reversal valve, the first expansion valve and the second expansion valve,
The air inlet of the compressor is connected with the 4th port of the four-way reversing valve, gas outlet and the four-way reversing valve
3rd port is connected, the second port and second of the first port of the four-way reversing valve respectively with the first thermal source heat exchanger
First group of port of thermal source heat exchanger second port connection, the first port of first group of port of the user side heat exchanger with
The second port connection of the four-way reversing valve, the second port of first group of port of the user side heat exchanger is divided into first
Road and the second branch road, the tie point are connected with the first port of the first thermal source heat exchanger, second branch road and institute
The first port connection of first group of port of Secondary Heat Source heat exchanger is stated,
First expansion valve is connected in the tie point, and second expansion valve is connected on second branch road.
3. heat pump according to claim 2, it is characterised in that the operation of the heat pump include refrigeration mode and
Heating mode,
Wherein, in a heating mode, the first port of the four-way reversing valve is connected with the 4th port, second port and the 3rd end
Mouth connection；
In cooling mode, the first port of the four-way reversing valve is connected with the 3rd port, and second port and the 4th port connect
It is logical.
4. heat pump according to claim 2, it is characterised in that the refrigerant loop also includes fan, the wind
Fan is located at the side of the first thermal source heat exchanger, for air to be blowed into the first thermal source heat exchanger.
5. heat pump according to claim 2, it is characterised in that the air inlet port of the first thermal source heat exchanger
On be connected with the first temperature monitor, second port and be connected with second temperature detector,
The second port of first group of port of the Secondary Heat Source heat exchanger is provided with the 4th temperature monitor.
6. heat pump according to claim 1, it is characterised in that the Secondary Heat Source loop also includes the first working medium pump
And underground pipe, the underground pipe is embedded in soil, for absorbing the heat in soil,
The suction inlet of first working medium pump is connected with the first port of the underground pipe, and mouth and described the are arranged outside the working medium pump
The first port connection of second group of port of two thermal source heat exchangers, the second end of second group of port of the Secondary Heat Source heat exchanger
Mouth is connected with the second port of the underground pipe.
7. heat pump according to claim 6, it is characterised in that the outer row mouthful and described second of first working medium pump
The 3rd temperature monitor is connected between the first port of second group of port of thermal source heat exchanger.
8. heat pump according to claim 1, it is characterised in that also including user side heat exchange loop, the user
Side heat exchange loop includes the second working medium pump and terminal heat exchanger, and is carried out through the user side heat exchanger and coolant circuit
Heat exchange,
Wherein, the suction inlet of second working medium pump is connected with the second port of the terminal heat exchanger, and outer row mouthful uses with described
Second group of port of family side heat exchanger second port connection, the first port of second group of port of the user side heat exchanger with
The first port connection of the terminal heat exchanger.
9. a kind of control method of heat pump, it is characterised in that including：
The exchange rate between the first thermal source and refrigerant loop is obtained respectively, and between Secondary Heat Source and refrigerant loop
Exchange rate, wherein the first thermal source be air-source thermal source；
According to the exchange rate between acquired first thermal source and refrigerant loop, and the Secondary Heat Source and system
Exchange rate between refrigerant circuit, judges that at least one enabled in the first thermal source and Secondary Heat Source is entered with user side
Row heat exchange.
10. the control method of heat pump according to claim 9, it is characterised in that the thermal source of acquisition first and system
Exchange rate between refrigerant circuit includes：
Detect the inlet air temp T of the air inlet port of the first thermal source heat exchanger1With refrigerant exit temperature T2, measure institute
State the heat exchange efficiency coefficient ε of the first thermal source heat exchangera, and detect the air mass flow G for flowing through the first thermal source heat exchangera,
According to formula Qa=Ga·Ca·εa·|T1-T2|, calculate the heat exchange rate Q of the first thermal source heat exchangera, wherein, CaFor air
Specific heat capacity.
11. the control method of heat pump according to claim 9, it is characterised in that the detection Secondary Heat Source and system
Exchange rate between refrigerant circuit includes：
Detect the working medium entrances temperature T of Secondary Heat Source heat exchanger3With refrigerant exit temperature T4, measure the Secondary Heat Source heat exchange
The heat exchange efficiency coefficient ε of devices, and detect the working medium flow G for flowing through Secondary Heat Source heat exchangers,
According to formula Qs=Gs·Cs·εs·|T3-T4|, calculate the heat exchange rate Q of the second heat exchangers, wherein, CsFor Secondary Heat Source
The specific heat capacity of heat exchanger working medium.
12. the control method of heat pump according to claim 9, it is characterised in that described acquired in the basis
Heat exchange between exchange rate between first thermal source and refrigerant loop, and the Secondary Heat Source and refrigerant loop
Speed, judges that at least one enabled in the first thermal source and Secondary Heat Source includes：
By the exchange rate between acquired first thermal source and refrigerant loop, and the Secondary Heat Source and refrigeration
The value of exchange rate between agent loop compared with the preset temperature value of user side, and according to comparative result determine select described in
At least one of first thermal source and Secondary Heat Source are enabled, and heat exchange are carried out with user side, to match with user's request.
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| CN201710333898.8A CN106949666A (en) | 2017-05-12 | 2017-05-12 | Heat pump and its control method |
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| CN107894052A (en) * | 2017-12-19 | 2018-04-10 | 陈相荣 | Water source heat pump air conditioning system is mixed in a kind of more water quality ultralow temperature, wide temperate zone |
| CN108423967A (en) * | 2018-05-15 | 2018-08-21 | 武汉都市环保工程技术股份有限公司 | A kind of sludge hydrofuge type multistage recuperation of heat anhydration system |
| CN110925856A (en) * | 2019-11-27 | 2020-03-27 | 珠海格力电器股份有限公司 | Air source heat pump unit control method and device and readable storage medium |
| CN111023614A (en) * | 2019-12-17 | 2020-04-17 | 沈阳航空航天大学 | A Helicopter Oil Source Direct Drive Heat Pump Air Conditioning System |
| CN112178848A (en) * | 2020-09-29 | 2021-01-05 | 武汉万居隆电器有限公司 | Efficient ground source heat pump machine |
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| CN111023614A (en) * | 2019-12-17 | 2020-04-17 | 沈阳航空航天大学 | A Helicopter Oil Source Direct Drive Heat Pump Air Conditioning System |
| CN112178848A (en) * | 2020-09-29 | 2021-01-05 | 武汉万居隆电器有限公司 | Efficient ground source heat pump machine |
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