CN106403345A - Heat pump system and control method thereof - Google Patents
Heat pump system and control method thereof Download PDFInfo
- Publication number
- CN106403345A CN106403345A CN201610987677.8A CN201610987677A CN106403345A CN 106403345 A CN106403345 A CN 106403345A CN 201610987677 A CN201610987677 A CN 201610987677A CN 106403345 A CN106403345 A CN 106403345A
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- Prior art keywords
- heat exchanger
- heat
- heat pump
- valve
- interface
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Classifications
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention discloses a heat pump system and a control method thereof. The heat pump system comprises a compressor, a reversing assembly, a first heat exchanger, a second heat exchanger and a fuel circulating device. The compressor is provided with a suction port and an exhaust port. The reversing assembly comprises a first connector, a second connector, a third connector and a fourth connector. The first connector is connected with the exhaust port. The third connector is connected with the suction port. The first end of the first heat exchanger is connected with the second connector. The second heat exchanger is connected between the second end of the first heat exchanger and the fourth connector. The fuel circulating device comprises a third heat exchanger, a gas furnace and a circulating pump. The third heat exchanger, the gas furnace and the circulating pump are sequentially connected end to end to form a closed flow path. The third heat exchanger is arranged between the second end of the first heat exchanger and the fourth connector. According to the heat pump system, the refrigerating requirement and the heating requirement under different outdoor temperature conditions can be met, the high energy efficiency can be achieved under the condition that the outdoor temperature is low, the heating comfort degree of the heat pump system is increased, and the operating cost is lowered.
Description
Technical field
The present invention relates to air-conditioning technical field, especially relate to a kind of heat pump and its control method.
Background technology
In correlation technique, in a heating mode, cold-producing medium passes through outdoor heat exchanger from outdoor ring to heat pump such as air-conditioning
Border absorbs heat, is then passed through compressor and improves pressure and temperature, the heat of outside is discharged to interior and reaches the effect heating.
Heat pump in cooling mode, after low-temperature refrigerant gets in heat exchanger heat absorption, improves temperature and pressure by compressor,
In outdoor heat exchanger heat release, the heat of indoor is discharged to outdoor, reaches refrigeration.
However, in a heating mode, outdoor temperature is lower, and the heat that can be transported to interior from outdoor is fewer, indoor
Heating effect will be poorer, and the coolant in outdoor heat exchanger since it is desired that absorb outdoor environment heat, need to be less than
The temperature of outdoor environment, this may result in outdoor heat exchanger can frosting in a heating mode, need defrosting to ensure to be after frosting
System can safely and effectively run.Under normal circumstances, heat pump COP (Coefficient Of in a heating mode
Performance, i.e. conversion ratio between energy and heat, abbreviation heating energy efficiency ratio) have 3 about, but work as outdoor temperature
Low to a certain extent when, coolant can will be considerably less from the heat of outdoor absorption, COP can drop to less than 0.5 so that
Indoor heating capacity might as well be directly used in the energy of electric heater acquisition directly by the electric energy of supply compressor.This
In the case of efficiency is low-down, the use of air-conditioning is not energy-conservation.
There are combustion gas in most of families now, if directly heating hot water with combustion gas, warm up heating installation on arrangement ground at home
Piece, by hot water circuit heat supply, again can temperature than relatively low when, there is booster, leak, produce harm.And most of family
Front yard needs for refrigeration in summer, and therefore most of families may select to install gas heater simultaneously and air-conditioning two is sheathed
Standby, and each equipment has the pipeline of oneself and terminal unit requires it is impossible to public terminals, leads to install and cost of use all can be very
Greatly.Additionally, the big area of the Summer and winter temperature difference will refrigeration in need and two kinds of demands of heating, wherein the heating requirement of low temp area
Higher, the traditional heat pump heating capacity in low temp area can not meet comfort level demand.
Content of the invention
It is contemplated that at least solving one of technical problem present in prior art.For this reason, one object of the present invention
It is to propose a kind of heat pump, this heat pump can meet refrigeration demand and the heating needs of user, structure is simple, installation
Convenience and efficiency height.
Further object is that proposing a kind of control method of heat pump.
Heat pump according to a first aspect of the present invention, including：Compressor, described compressor has air entry and aerofluxuss
Mouthful；Commutation assembly, described commutation assembly includes first interface to the 4th interface, and described first interface is connected with described air vent,
3rd interface is connected with described air entry；First Heat Exchanger, the first end of described First Heat Exchanger is connected with second interface；Second
Heat exchanger, described second heat exchanger is connected between the second end of described First Heat Exchanger and described 4th interface；Combustion gas circulates
Device, described combustion gas circulating device includes the 3rd heat exchanger, gas furnace and circulating pump, described 3rd heat exchanger, described gas furnace
It is in turn connected to form closure stream with described circulating pump head and the tail, described 3rd heat exchanger is located at the second end of described First Heat Exchanger
And described 4th interface between.
According to the heat pump of the present invention, by setting combustion gas circulating device in heat pump so that heat pump has
There are air energy and combustion gas two kinds of thermal source power of energy, heat pump can be according to carrying out practically environmental selection thermal source power system
Heat.Thus, heat pump can meet the heating needs at refrigeration demand and Bu Tong outdoor temperature, and can in outdoor temperature relatively
There is in the case of low higher efficiency, improve the comfort level that heat pump heats and reduce operating cost.Further, since
Heat pump has two kinds of thermal source power, and it is smaller that the heat exchanger (such as second heat exchanger etc.) in system can design, from
And reduce the overall volume of the off-premises station of heat pump, reduce taking up room of heat pump.
In addition, the technical characteristic adding as follows can also be had according to the heat pump of the present invention：
According to some embodiments of the present invention, described 3rd heat exchanger and described second heat exchanger are connected on described first and change
Between second end of hot device and described 4th interface, the first end of described 3rd heat exchanger and the second end phase of First Heat Exchanger
Even, the first end of described second heat exchanger is connected with described 4th interface, and described heat pump also includes：First on-off valve, institute
The one end stating the first on-off valve is connected between the second end of described second heat exchanger and the second end of described 3rd heat exchanger, institute
The other end stating the first on-off valve is connected between the described first end of described second heat exchanger and described 4th interface.
According to other embodiments of the present invention, described 3rd heat exchanger and described second heat exchanger are connected in parallel on described first
Between second end of heat exchanger and described 4th interface.
Further, the branch road being connected with the second end of described second heat exchanger is provided with the second on-off valve, with described
The branch road that the first end of three heat exchangers is connected is provided with the 3rd on-off valve.
Further, the branch road being connected with the first end of described 3rd heat exchanger is provided with check valve.
Alternatively, described 3rd heat exchanger is plate type heat exchanger.
The control method of heat pump according to embodiments of the present invention, comprises the following steps：
Detection outdoor temperature T；When described outdoor temperature T meets：During T >=T1, described gas furnace closing and described first is led to
Disconnected valve disconnects；When described outdoor temperature meets：During T ＜ T1, described gas furnace is opened and described first on-off valve closure.
Alternatively, described T1 meets：-10℃≤T1≤-5℃.
The control method of heat pump in accordance with another embodiment of the present invention, comprises the following steps：
Detection outdoor temperature t, when described outdoor temperature t meets：During t >=t1, described second on-off valve closure, the described 3rd
On-off valve disconnects；When described outdoor temperature t meets：During t2≤t ＜ t1, described second on-off valve closure, described 3rd on-off valve
Close and described gas furnace is opened；When described outdoor temperature t meets：During t ＜ t2, described second on-off valve disconnects, and the described 3rd
On-off valve closes and described gas furnace is opened.
Alternatively, described t1 meets：- 10 DEG C≤t1≤- 5 DEG C, described t2 meets：-20℃≤t1≤-15℃.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below
Substantially and easy to understand, wherein：
Fig. 1 is the system flow chart of heat pump according to embodiments of the present invention；
Fig. 2 is the graph of a relation with outdoor temperature for the efficiency of the heat pump shown in Fig. 1；
Fig. 3 is the system flow chart of heat pump in accordance with another embodiment of the present invention；
Fig. 4 is the graph of a relation with outdoor temperature for the efficiency of the heat pump shown in Fig. 3.
Reference：
Heat pump 100,
Compressor 1, air entry 11, air vent 12, gas-liquid separator 13,
Commutation assembly 2, first interface 21, second interface 22, the 3rd interface 23, the 4th interface 24,
First Heat Exchanger 3,
Second heat exchanger 4,
3rd heat exchanger 51, gas furnace 52, circulating pump 53,
First on-off valve 61, the second on-off valve 62, the 3rd on-off valve 63,
Restricting element 7, check valve 8.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention it is to be understood that term " on ", D score, "front", "rear", "left", "right", " perpendicular
Directly ", the orientation of instruction such as " level ", " top ", " bottom ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position
Put relation, be for only for ease of and describe the present invention and simplify description, rather than indicate or imply that the device of indication or element are necessary
There is specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term
" first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate indication
The quantity of the technical characteristic showing.Thus, define " first ", the feature of " second " can express or implicitly include one or
More this feature of person.In describing the invention, unless otherwise stated, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Below with reference to Fig. 1-Fig. 4, heat pump 100 according to embodiments of the present invention is described.Wherein, heat pump 100 is permissible
For heating and air conditioner etc..
As shown in figures 1 and 3, heat pump 100 according to embodiments of the present invention, including：Compressor 1, commutation assembly 2,
First Heat Exchanger 3, the second heat exchanger 4 and combustion gas circulating device.Wherein, First Heat Exchanger 3 can be indoor heat exchanger, and second changes
Hot device 4 can be outdoor heat exchanger.
Alternatively, compressor 1 can be vertical compressor 1.In the application explained below, it is vertical with compressor 1
Illustrate as a example compressor 1.Certainly, those skilled in the art are appreciated that compressor 1 can also be horizontal compressor
1.Here, it should be noted that " vertical compressor 1 " can be understood as the central axis of the cylinder of compressor 1 structure of compressor 1
Compressor 1 perpendicular to the installed surface of compressor 1.Correspondingly, " horizontal compressor 1 " can be understood as cylinder central axis big
Cause the compressor 1 of the installed surface parallel to compressor 1.
As shown in figure 1, compressor 1 has air entry 11 and air vent 12, wherein, air vent 12 can be formed at compressor
1 top, air entry 11 can be formed at the bottom of compressor 1.Specifically, compressor 1 also includes gas-liquid separator 13, gas-liquid
Separator 13 is connected with air entry 11, to prevent compressor 1 from liquid hit phenomenon, thus, it is possible to improve the reliability of compressor 1
Property.
Commutation assembly 2 includes first interface 21, second interface 22, the 3rd interface 23 and the 4th interface 24.Wherein, first connect
Mouth 21 is connected with air vent 12, and the 3rd interface 23 is connected with air entry 11.For example, in the example of Fig. 1 and Fig. 3, the 3rd interface
23 are connected with air entry 11 by gas-liquid separator 13.Heat pump 100 can be realized by adjusting commutation assembly 2 in different works
Switching between operation mode, for example, switching of refrigeration mode and heating mode etc..
Alternatively, commutation assembly 2 can be four-way change-over valve, but not limited to this.
Wherein, the first end left end of First Heat Exchanger 3 (for example, in Fig. 1) of First Heat Exchanger 3 and second interface 22 phase
Even, the second heat exchanger 4 is connected to second end right-hand member of First Heat Exchanger 3 (for example, in Fig. 1) of First Heat Exchanger 3 and connects with the 4th
Between mouth 24.
Further, with reference to Fig. 1 and Fig. 3, for example swollen being provided with restricting element 7 at the second end of First Heat Exchanger 3
Swollen valve etc., coolant can pass through restricting element 7 reducing pressure by regulating flow.
Combustion gas circulating device includes the 3rd heat exchanger 51, gas furnace 52 and circulating pump 53, the 3rd heat exchanger 51, gas furnace 52
It is in turn connected to form closure stream with circulating pump 53 head and the tail, the 3rd heat exchanger 51 is located at second end and the 4th of First Heat Exchanger 3
Between interface 24.Specifically, it is provided with heat transferring medium in combustion gas circulating device, heat transferring medium can be in the 3rd heat exchanger 51, combustion gas
Flowing in the closure stream being formed between stove 52 and circulating pump 53.
Wherein, heat transferring medium can be the preferable thermal liquid of resistance to frost.Circulating pump 53 can make heat transferring medium upper
State flowing in closure stream.In a heating mode, when gas furnace 52 is opened, the coolant flowing through the 3rd heat exchanger 51 can be
Carry out heat exchange with heat transferring medium in three heat exchangers 51, combustion gas now can be used to be heated as thermal source power.Work as combustion gas
When stove 52 cuts out, the coolant in heat pump 100 can carry out heat exchange with outdoor environment, is used air can enter as thermal source power
Row heats.
Thus, in a heating mode, user can select heat pump according to the use environment of heat pump 100 and heating needs
The thermal source power of system 100.For example, heat pump 100 can by outdoor temperature judge indoor heating output whether meet easypro
Appropriateness requires or whether is less than the operating cost of air energy unit time by the operating cost judging the combustion gas energy unit time
Select the thermal source power of heat pump 100, to improve efficiency and the comfort level demand of heat pump 100, and reduce heat pump
100 use cost.
Specifically, in a heating mode, heat pump 100 can be used alone air can be used as thermal source power system
Heat can be heated as thermal source power it is also possible to be used alone combustion gas, can also be simultaneously using air energy and two kinds of combustion gas energy
Thermal source power is heated.
For example, heat pump 100 can according to outdoor temperature T judge indoor heating output whether meet comfort level require and
Whether the operating cost of combustion gas energy unit time is less than the thermal source of the operating cost selection heat pump 100 of air energy unit time
Power.
Specifically, when outdoor temperature T meets：During T >=T1, for example, during T >=-5 DEG C, the cold coal in heat pump 100 is permissible
Absorb more heat from outdoor environment, now, be used alone air can carry out heating can meet comfort level require and warp
Ji property requires.When outdoor temperature meets T ＜ T1, for example, the coolant in heat pump 100 during ＜ -5 DEG C of T is from outdoor environment
The heat that can absorb is less, is used alone air and can meet comfort level requirement and the operating cost meeting of heat pump 100
Increase, now can be used alone combustion gas can or simultaneously using air can and combustion gas can carry out heating improve comfort level will
Ask, reduce operating cost, improve the efficiency of heat pump 100.Wherein, the heat energy density of gas furnace 52 is larger, is opening
Before gas furnace 52, can first open circulating pump 53, then open gas furnace 52 again, thermal liquid is heated by fuel gas buring.
Alternatively, the 3rd heat exchanger 51 can be plate type heat exchanger etc., but not limited to this.
Here, it should be noted that " operating cost of combustion gas energy unit time " described in the application is equal to gas furnace
The operating cost of 52 unit interval and the operating cost sum of compressor 1 unit interval, correspondingly, " the air energy unit time
Operating cost " is equal to the operating cost of outdoor fan unit interval and the operating cost sum of compressor 1 unit interval.
Heat pump 100 according to embodiments of the present invention, by arranging combustion gas circulating device in heat pump 100, makes
Obtain heat pump 100 and there are air energy and combustion gas two kinds of thermal source power of energy, heat pump 100 can select according to carrying out practically environment
Select thermal source power to be heated.Thus, heat pump 100 can meet and heats need at refrigeration demand and Bu Tong outdoor temperature
Ask, and can have higher efficiency in the case that outdoor temperature is relatively low, improve the comfort level that heat pump 100 heats and
Reduce operating cost.Outdoor heat exchanger (such as further, since heat pump 100 has two kinds of thermal source power, in system
Two heat exchangers 4 etc.) can design smaller, thus reducing the overall volume of the off-premises station of heat pump 100, reduce heat
The taking up room of pumping system 100.
Two specific embodiments that according to embodiments of the present invention heat pump 100 is described below in detail are specifically real with each
Apply the corresponding control method of example.
Embodiment one：
As shown in figure 1, in the present embodiment, the 3rd heat exchanger 51 and the second heat exchanger 4 are connected on the of First Heat Exchanger 3
Between two ends and the 4th interface 24, the first end of the 3rd heat exchanger 51 is connected with the second end of First Heat Exchanger 3, the second heat exchanger
4 first end is connected with the 4th interface 24.Further, heat pump 100 also includes the first on-off valve 61, the first on-off valve 61
One end (for example, the right-hand member in Fig. 1) be connected between the second end and second end of the 3rd heat exchanger 51 of the second heat exchanger 4,
The other end (for example, the left end in Fig. 1) of the first on-off valve 61 be connected to the first end of the second heat exchanger 4 and the 4th interface 24 it
Between.Wherein, the first on-off valve 61 is electromagnetic valve, but not limited to this.
For example, in cooling mode, the first interface 21 of commutation assembly 2 is connected with the 4th interface 24, second interface 22 and
3rd interface 23 is connected, and the first on-off valve 61 disconnects and gas furnace 52 is closed, and the high temperature discharged from the air vent 12 of compressor 1 is high
Pressure coolant flows to the second heat exchanger 4, and sequentially passes through the second heat exchanger 4 and the 3rd heat exchanger 51 carries out heat exchange with outdoor environment,
Coolant after heat exchange flows to First Heat Exchanger 3 through restricting element 7, and carries out heat exchange with indoor environment in First Heat Exchanger 3
So that to indoor refrigeration, the coolant after heat exchange flows to gas-liquid separator 13, and the air entry 11 through compressor 1 is back to compressor
Compressed by compressor 1 in 1, form kind of refrigeration cycle, reciprocal with this.
In a heating mode, the first interface 21 of commutation assembly 2 is connected with second interface 22, and the 3rd interface 23 connects with the 4th
Mouth 24 is connected.In a heating mode, the control method of heat pump 100 comprises the following steps：
Detection outdoor temperature T；
When outdoor temperature T meets：During T >=T1, gas furnace 52 is closed and the first on-off valve 61 disconnects；
When outdoor temperature T meets：During T ＜ T1, gas furnace 52 is opened and the first on-off valve 61 closes.
Specifically, outdoor temperature T can be detected by temperature sensor, when outdoor temperature T meets：During T >=T1, heat pump
System 100 can be used alone air and can be heated, when outdoor temperature T meets：During T ＜ T1, heat pump 100 can be independent
Can be heated using combustion gas.Heat pump 100 can be according to the difference of outdoor temperature, and selection is used alone air and can be made
Heat or be used alone combustion gas can be heated it is ensured that heat pump 100 efficiency in a heating mode and heating capacity so that
Heat pump 100 can keep higher heating efficiency and optimal comfortable heat output state.
Wherein, when outdoor temperature T meets：During T >=T1, coolant can absorb more heat from outdoor environment, uses
Air can carry out heating can meet comfort level require and operating cost is relatively low.Specifically, with reference to Fig. 1, gas furnace 52 close and
First on-off valve 61 disconnects, and the High Temperature High Pressure coolant discharged from the air vent 12 of compressor 1 flows to First Heat Exchanger 3, and the
Carry out heat exchange with indoor environment, the coolant after heat exchange flows to restricting element 7, through restricting element 7 reducing pressure by regulating flow in one heat exchanger 3
Afterwards, the 3rd heat exchanger 51 and the second heat exchanger 4 are flowed through successively and in the 3rd heat exchanger 51 and the second heat exchanger 4 and outdoor environment
Heat exchange, the coolant after heat exchange flows to gas-liquid separator 13, and is back in compressor 1 through the air entry 11 of compressor 1 and is pressed
Contracting machine 1 compresses, and is formed and heats circulation, reciprocal with this.Wherein, coolant can in the 3rd heat exchanger 51 and the second heat exchanger 4 with
Outdoor environment carries out heat exchange, increases heat exchange area, thus increasing the heat that coolant absorbs from outdoor environment, improves heat
The heating effect of pumping system 100.
When outdoor temperature T meets：T ＜ T1, outdoor temperature is relatively low, and the evaporator refrigerant temperature in the second heat exchanger 4 is relatively low,
Refrigerant circulation in heat pump 100 can reduce, and the heat absorbing from the second heat exchanger 4 and the 3rd heat exchanger 51 is relatively
Few, the entirety of heat pump 100 heats output and tails off, be used alone air can meet comfort level require and operating cost relatively
Height, less economical, can be used alone combustion gas and can be heated it is ensured that the efficiency of heat pump 100 and heating capacity are so that warm
Pumping system 100 can keep higher heating efficiency and the optimal comfortable operation heating output state, reducing heat pump 100
Expense.
Specifically, with reference to Fig. 1, gas furnace 52 is opened and the first on-off valve 61 closes, and wherein can first open circulating pump 53,
Then open gas furnace 52 again, thermal liquid is heated by fuel gas buring.The High Temperature High Pressure discharged from the air vent 12 of compressor 1
Coolant flows to First Heat Exchanger 3, and carries out heat exchange with indoor environment in First Heat Exchanger 3, the coolant flow direction throttling after heat exchange
Element 7, after restricting element 7 reducing pressure by regulating flow, flows through the 3rd heat exchanger 51 and the thermal liquid heat exchange after gas furnace 52 heating,
Coolant after heat exchange flows directly into gas-liquid separator 13, and is back in compressor 1 through the air entry 11 of compressor 1 and is compressed
Machine 1 compresses, and is formed and heats circulation, reciprocal with this.Thus, coolant is in the load in the 3rd heat exchanger 51 and after gas furnace 52 heating
Hot liquid carries out heat exchange, it is possible to obtain higher evaporating temperature, and the refrigerant circulation in heat pump 100 increases, and improves heat
The efficiency of pumping system 100 and improve comfort level and reduce operating cost.
Alternatively, T1 meets：-10℃≤T1≤-5℃.Its concrete numerical value can be according to the The concrete specification type of heat pump 100
Number and use environment adjusted design, the present invention is not especially limited to this.For example, T1 can meet further：T1=-5 DEG C, T1
=-8 DEG C or T1=-10 DEG C etc..
The pass of efficiency under different heat sources power for the heat pump 100 and heating capacity and outdoor temperature T in the present embodiment
System is as shown in Figure 2.From figure 2 it can be seen that when in outdoor temperature T ＜ T1, heat pump 100 when being used alone combustion gas energy
Heating energy efficiency ratio (COP) a little declines although having, and ensure that the heating capacity of heat pump 100, improves heat pump
100 comfort levels heating simultaneously reduce operating cost.
Embodiment two：
As shown in figure 3, the 3rd heat exchanger 51 in this enforcement and the second heat exchanger 4 are connected in parallel on the second of First Heat Exchanger 3
Between end and the 4th interface 24.Further, the branch road being connected with the second end of the second heat exchanger 4 is provided with the second on-off valve
62, the branch road being connected with the first end of the 3rd heat exchanger 51 is provided with the 3rd on-off valve 63.Thus, in a heating mode, Ke Yitong
Cross and control the second on-off valve 62 and the 3rd on-off valve 63 to control the thermal source power of heat pump 100.
Further, the branch road being connected with the first end of the 3rd heat exchanger 51 is provided with check valve 8.Thus, in refrigeration mode
Under, can avoid entering heat exchange in the 3rd heat exchanger 51 so that from compressor 1 from the coolant that the air vent 12 of compressor 1 is discharged
Air vent 12 discharge coolant fully enter heat exchange in the second heat exchanger 4.
Alternatively, the second on-off valve 62 and the 3rd on-off valve 63 are electromagnetic valve, but not limited to this.
In a heating mode, the control method of heat pump 100 comprises the following steps：
Detection outdoor temperature t, when outdoor temperature t meets：During t >=t1, the second on-off valve 62 closes, and the 3rd on-off valve 63 breaks
Open；
When outdoor temperature t meets：During t2≤t ＜ t1, the second on-off valve 62 closes, and the 3rd on-off valve 63 closes and gas furnace
52 open；
When outdoor temperature t meets：During t ＜ t2, the second on-off valve 62 disconnects, and the 3rd on-off valve 63 closes and gas furnace 52 dozens
Open.
Specifically, outdoor temperature t can be detected by temperature sensor, when outdoor temperature t meets：During t >=t1, heat pump
System 100 can be used alone air and can be heated, when outdoor temperature t meets：T2≤t ＜ t1, heat pump 100 can be same
When using air can and combustion gas can be heated, when outdoor temperature t meet：During t ＜ t2, heat pump 100 can be used alone
Combustion gas can be heated.Thus, heat pump 100 can be according to the difference of outdoor temperature, and selection is used alone air and can carry out
Heat, be used alone combustion gas and can carry out heating, can be heated it is ensured that heat pump 100 exists using air energy and combustion gas simultaneously
Efficiency under heating mode and heating capacity are so that heat pump 100 can keep higher heating efficiency and optimal comfortable
Heat output state.
Wherein, when outdoor temperature T meets：During t >=t1, coolant can absorb more heat from outdoor environment, individually
Can carry out heating using air can meet comfort level require and operating cost is relatively low.Specifically, with reference to Fig. 3, the second on-off valve
62 closures, when the 3rd on-off valve 63 disconnects and gas furnace 52 is closed, from the High Temperature High Pressure coolant of air vent 12 discharge of compressor 1
Flow to First Heat Exchanger 3, and carry out heat exchange with indoor environment in First Heat Exchanger 3, the coolant after heat exchange flows to restricting element
7, after restricting element 7 reducing pressure by regulating flow, enter the second heat exchanger 4 and the second heat exchanger 4 in and outdoor environment heat exchange, after heat exchange
Coolant flow to gas-liquid separator 13, and be back in compressor 1 through the air entry 11 of compressor 1 and compressed by compressor 1, shape
Become to heat circulation, reciprocal with this.Thus, heat pump 100 is used alone air and can be heated, and improves the energy of heating
Effect and the comfort level heating output, and reduce the operating cost of heat pump 100.
When outdoor temperature t meets：During t2≤t ＜ t1, when being used alone air energy, coolant can absorb from outdoor environment
Less heat, be used alone air can meet comfort level require and operating cost is higher, less economical, now make simultaneously
With combustion gas can and air can be heated it is ensured that efficiency and the heating capacity of heat pump 100 are so that heat pump 100
Higher heating efficiency and the optimal comfortable operating cost heating output state, reducing heat pump 100 can be kept.
With reference to Fig. 3, the second on-off valve 62 closes, and the 3rd on-off valve 63 closes and gas furnace 52 is opened, from the row of compressor 1
The High Temperature High Pressure coolant that QI KOU 12 is discharged flows to First Heat Exchanger 3, and carries out heat exchange with indoor environment in First Heat Exchanger 3,
Coolant after heat exchange flows to restricting element 7, and after restricting element 7 reducing pressure by regulating flow, coolant is divided into two parts, a portion coolant
Enter the 3rd heat exchanger 51 and carry out heat exchange with the thermal liquid after gas furnace 52 heating, another part coolant enters the second heat exchange
Device 4 and outdoor environment carry out heat exchange, the coolant after heat exchange in the second heat exchanger 4 and cold after heat exchange in the 3rd heat exchanger 51
Matchmaker's flowing out and flowing to gas-liquid separator 13 after mixing from the first end of the second heat exchanger 4 and the 3rd heat exchanger 51 respectively, and warp
The air entry 11 of overcompression machine 1 is back in compressor 1 and is compressed by compressor 1, is formed and heats circulation, reciprocal with this.
When outdoor temperature t meets：During t ＜ t2, coolant is difficult to absorb heat from outdoor environment, is used alone air
Can or simultaneously using air can and during combustion gas energy, the efficiency of heat pump 100 can degradation and compressor 1 efficiency relatively
Low, now can be used alone combustion gas can be heated.
With reference to Fig. 3, the second on-off valve 62 disconnects, and the 3rd on-off valve 63 closes and gas furnace 52 is opened, from the row of compressor 1
The High Temperature High Pressure coolant that QI KOU 12 is discharged flows to First Heat Exchanger 3, and carries out heat exchange with indoor environment in First Heat Exchanger 3,
Coolant after heat exchange flows to restricting element 7, after restricting element 7 reducing pressure by regulating flow, flows through the 3rd heat exchanger 51 and through gas furnace 52
Thermal liquid heat exchange after heating, the coolant after heat exchange flows directly into gas-liquid separator 13, and the air entry 11 through compressor 1
It is back in compressor 1 and is compressed by compressor 1, formed and heat circulation, reciprocal with this.
It is, of course, understood that when outdoor temperature t meets：It is also possible to disconnect the second on-off valve 62 during t2≤t ＜ t1,
Close the 3rd on-off valve 63 and open gas furnace 52 so that heat pump 100 is used alone combustion gas can be heated.Thus, same
Sample can ensure that heating capacity and the efficiency of heat pump 100.
Alternatively, t1 meets：- 10 DEG C≤t1≤- 5 DEG C, t2 meets：-20℃≤t1≤-15℃.Wherein, the tool of t1 and t1
Body numerical value can be according to the The concrete specification model of heat pump 100 and use environment adjusted design, and the present invention does not make to this specifically
Limit.For example, t1 can meet further：T1=-5 DEG C, t1=-8 DEG C or t1=-10 DEG C.T2 can meet further：t2
=-15 DEG C, t2=-18 DEG C or t2=-20 DEG C etc..
In cooling mode, the first interface 21 of commutation assembly 2 is connected with the 4th interface 24, and second interface 22 connects with the 3rd
Mouth 23 is connected, and can close the second on-off valve 62 and close gas furnace 52, the High Temperature High Pressure discharged from the air vent 12 of compressor 1
Coolant flows to the second heat exchanger 4, and carries out heat exchange with outdoor environment in the second heat exchanger 4, and the coolant after heat exchange is through throttling
Flow to First Heat Exchanger 3 after element 7 reducing pressure by regulating flow, and carry out heat exchange with to indoor system with indoor environment in First Heat Exchanger 3
Cold, the coolant after heat exchange flows to gas-liquid separator 13, and is back in compressor 1 through the air entry 11 of compressor 1 and is compressed
Machine 1 compresses, and forms kind of refrigeration cycle, reciprocal with this.
The pass of efficiency under different heat sources power for the heat pump 100 and heating capacity and outdoor temperature t in the present embodiment
System is as shown in Figure 4.Figure 4, it is seen that when outdoor temperature t meets：During t2≤t ＜ t1, simultaneously using air energy and combustion gas
During energy, and when outdoor temperature t meets：During t ＜ t2, when being used alone combustion gas energy, the heating energy efficiency ratio of heat pump 100
(COP) have and a little decline, but ensure that the heating capacity of heat pump 100, thus improve that heat pump 100 heats relaxes
Appropriateness.
According to some embodiments of the present invention, the thermal liquid in combustion gas circulating device heated by gas furnace 52 after temperature
Can be 20 DEG C about, thus, it is possible to ensure the coolant in heat pump 100 and the evaporating temperature after thermal liquid heat exchange, carry
The high delivery efficiency of compressor 1, thus improve efficiency and the heating effect of heat pump 100.
According to some embodiments of the present invention, when heat pump 100 can be heated for thermal source power using combustion gas, example
As the combustion gas circulation when can or can be able to be heated with combustion gas using air using combustion gas simultaneously, in combustion gas circulating device
Heat exchange with the refrigerant circulation in heat pump 100 is coupling process that is to say, that the endothermic process of refrigerant circulation and combustion gas follow
The exothermic process of ring is balance, and the heat absorbing in refrigerant circulation is constantly mated with liberated heat in combustion gas circulation.Thus,
Coolant can be prevented to be heated excessively, improve the reliability of heat pump 100.
Heat pump 100 according to embodiments of the present invention, can meet refrigeration demand and the relatively low situation of outdoor environment simultaneously
Under heating needs, and in the case that outdoor environment is relatively low, by selecting different thermal source power it is ensured that heat pump
100 efficiencies in a heating mode and heating capacity are so that heat pump 100 can keep higher heating efficiency and optimal
Comfortable heat output state.In addition, by integrated for combustion gas circulating device in outer machine heat exchange, decrease off-premises station frosting time and
Frequency, or even do not need at low temperature to defrost, eliminate the defrosting step in traditional heat pump, further increasing system
The comfort level of thermal output.And for the area that gas energy is sufficient, heat pump 100 can alleviate the supply of electric power effectively
Pressure, improves the utilization ratio of the energy, energy-saving and emission-reduction.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features, the knot describing with reference to this embodiment or example
Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy
Point can combine in any one or more embodiments or example in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
Multiple changes, modification, replacement and modification can be carried out to these embodiments in the case of the principle of the disengaging present invention and objective, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of heat pump is it is characterised in that include：
Compressor, described compressor has air entry and air vent；
Commutation assembly, described commutation assembly includes first interface to the 4th interface, and described first interface is connected with described air vent,
3rd interface is connected with described air entry；
First Heat Exchanger, the first end of described First Heat Exchanger is connected with second interface；
Second heat exchanger, described second heat exchanger is connected between the second end of described First Heat Exchanger and described 4th interface；
Combustion gas circulating device, described combustion gas circulating device includes the 3rd heat exchanger, gas furnace and circulating pump, described 3rd heat exchange
Device, described gas furnace and described circulating pump head and the tail are in turn connected to form closure stream, and described 3rd heat exchanger is located at described first
Between second end of heat exchanger and described 4th interface.
2. heat pump according to claim 1 is it is characterised in that described 3rd heat exchanger and described second heat exchanger string
It is associated between the second end of described First Heat Exchanger and described 4th interface, the first end of described 3rd heat exchanger and the first heat exchange
Second end of device is connected, and the first end of described second heat exchanger is connected with described 4th interface,
Described heat pump further includes：First on-off valve, one end of described first on-off valve is connected to described second heat exchange
Between second end of the second end of device and described 3rd heat exchanger, the other end of described first on-off valve is connected to described second and changes
Between the described first end of hot device and described 4th interface.
3. heat pump according to claim 1 it is characterised in that described 3rd heat exchanger and described second heat exchanger simultaneously
It is associated between the second end of described First Heat Exchanger and described 4th interface.
4. heat pump according to claim 3 is it is characterised in that be connected with the second end of described second heat exchanger is propped up
Road is provided with the second on-off valve, and the branch road being connected with the first end of described 3rd heat exchanger is provided with the 3rd on-off valve.
5. heat pump according to claim 4 is it is characterised in that be connected with the first end of described 3rd heat exchanger is propped up
Road is provided with check valve.
6. heat pump according to claim 1 is it is characterised in that described 3rd heat exchanger is plate type heat exchanger.
7. a kind of control method of heat pump according to claim 2 is it is characterised in that comprise the following steps：
Detection outdoor temperature T；
When described outdoor temperature T meets：During T >=T1, described gas furnace is closed and described first on-off valve disconnects；
When described outdoor temperature meets：During T ＜ T1, described gas furnace is opened and described first on-off valve closure.
8. the control method of heat pump according to claim 7 is it is characterised in that described T1 meets：-10℃≤T1
≤-5℃.
9. a kind of control method of heat pump according to claim 4 is it is characterised in that comprise the following steps：
Detection outdoor temperature t,
When described outdoor temperature t meets：During t >=t1, described second on-off valve closure, described 3rd on-off valve disconnects；
When described outdoor temperature t meets：During t2≤t ＜ t1, described second on-off valve closure, described 3rd on-off valve closure and institute
State gas furnace to open；
When described outdoor temperature t meets：During t ＜ t2, described second on-off valve disconnects, and described 3rd on-off valve closes and described combustion
Steam stove is opened.
10. the control method of heat pump according to claim 9 is it is characterised in that described t1 meets：-10℃≤t1
≤ -5 DEG C, described t2 meets：-20℃≤t1≤-15℃.
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| CN201610987677.8A CN106403345A (en) | 2016-11-09 | 2016-11-09 | Heat pump system and control method thereof |
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| CN201610987677.8A CN106403345A (en) | 2016-11-09 | 2016-11-09 | Heat pump system and control method thereof |
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| CN108758815A (en) * | 2018-06-20 | 2018-11-06 | 广东美的暖通设备有限公司 | Heat transmission equipment and its heat-production control method |
| CN108917060A (en) * | 2018-07-31 | 2018-11-30 | 广东美的暖通设备有限公司 | Control method and device, storage medium and the heating system of heating system |
| CN108931075A (en) * | 2018-06-20 | 2018-12-04 | 广东美的暖通设备有限公司 | Heat pump system and its control method |
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Application publication date: 20170215 |