CN104949385A - Automotive heat pump system - Google Patents
Automotive heat pump system Download PDFInfo
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- CN104949385A CN104949385A CN201410125911.7A CN201410125911A CN104949385A CN 104949385 A CN104949385 A CN 104949385A CN 201410125911 A CN201410125911 A CN 201410125911A CN 104949385 A CN104949385 A CN 104949385A
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- cold
- producing medium
- evaporimeter
- air
- heat pump
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses an automotive heat pump system. The automotive heat pump system comprises a dehumidification route which is used for supplying part of refrigerating fluid to an evaporator after the refrigerating fluid in a refrigerating fluid circulating route flows through a first expansion device and before the refrigerating fluid is led into an external heat exchanger so as to dehumidify the interior of a vehicle in a heat pump mode; accordingly, when the interior of the vehicle is dehumidified and before the refrigerating fluid is led into the external heat exchanger with higher pressure than the evaporator, the refrigerating fluid is allowed to smoothly flow to the low-pressure evaporator through the dehumidification route and dehumidifies the interior of the vehicle stably.
Description
Technical field
The present invention relates to a kind of Vehicular heat pump system, more particularly, relate to so a kind of Vehicular heat pump system, this Vehicular heat pump system comprises: dehumidifying line, part of refrigerant was wherein supplied to evaporimeter by the flow of refrigerant for circulating in refrigerant circulation lines after the first expansion gear before being introduced in external heat exchanger, to dehumidify to the inside of vehicle in the heat pump mode, thus when dehumidifying to the inside of vehicle, before being introduced in the external heat exchanger compared with evaporimeter with elevated pressures at cold-producing medium, cold-producing medium is allowed to flow to the evaporimeter of low pressure reposefully by dehumidifying line, and dehumidified in the inside of vehicle reposefully.
Background technology
In general, car air-conditioner comprises for making the inner colded cooling system of vehicle and the heating system for heating the inside of vehicle.At the vaporizer side of refrigerant circulation, cooling system by the air that makes to flow through evaporimeter outside with carry out heat exchange at the cold-producing medium of evaporimeter internal flow and air be converted to cold air, to make the internal cooling of vehicle.In the heater core side of cooling water circulation, heating system by the air that makes to flow through heater core outside with carry out heat exchange at the cooling water of heater core internal flow and air be converted to warm air, with the inside of heated vehicle.
Meanwhile, the heat pump different from car air-conditioner is employed, and this heat pump can use a refrigerant circulation optionally to perform cooling and heating by the flow direction changing cold-producing medium.Such as, heat pump comprises two heat exchangers (one to be mounted in air-conditioning shell inner for carrying out the internal exchanger of heat exchange with the air of the inside being blown into vehicle; Another is for carrying out the external heat exchanger of heat exchange with the environment of air-conditioning shell outside) and direction control valve for making the flow direction of cold-producing medium change.Therefore, according to the flow direction of the cold-producing medium regulated by direction control valve, when operating at refrigerating mode, internal exchanger is used as the heat exchanger of cooling, and internal exchanger is used as the heat exchanger of heating when operating at heating mode.
Proposed polytype Vehicular heat pump system, and Fig. 1 shows the representative illustration of Vehicular heat pump system.
As shown in Figure 1, Vehicular heat pump system comprises: compressor 30, for compression and refrigerant emission; Internal exchanger 32, carries out radiation for making the heat of the cold-producing medium discharged from compressor 30; First expansion valve 34 and the first bypass valve 36, installing in parallel, passing through for optionally making the cold-producing medium flowing through internal exchanger 32; External heat exchanger 48, carries out heat exchange for the cold-producing medium and outdoor environment making to flow through the first expansion valve 34 or the first bypass valve 36; Evaporimeter 60, for making the cold-producing medium evaporation flowing through external heat exchanger 48; Storage tank (accumulator) 62, for being divided into vapor phase refrigerant and liquid phase refrigerant by the cold-producing medium flowing through evaporimeter 60; Inner side heat exchanger 50, carries out heat exchange for making the cold-producing medium being supplied to evaporimeter 60 with the cold-producing medium turning back to compressor 30; Second expansion valve 56, expands for optionally making the cold-producing medium being supplied to evaporimeter 60; Second bypass valve 58, installs in parallel with the second expansion valve 56, is connected with the entrance side of storage tank 62 for optionally making the outlet side of external heat exchanger 48.
In FIG, label 10 indicates air-conditioning shell, and internal exchanger 32 and evaporimeter 60 are embedded in air-conditioning shell 10, label 12 indicated temperature adjustment doors, for controlling the combined amount of cold air and warm air, and label 20 instruction is arranged on the air blast of the porch of air-conditioning shell.
According to the heat pump with said structure, when operating at heat pump mode (heating mode), the first bypass valve 36 and the second expansion valve 56 are closed, and the first expansion valve 34 and the second bypass valve 58 are opened.In addition, temperature adjustment doors 12 is according to operating as shown in Figure 1.Therefore, the cold-producing medium discharged from compressor 30 flows through the low-pressure side 54 of internal exchanger 32, first expansion valve 34, external heat exchanger 48, high-pressure side 52, second bypass valve 58 of inner side heat exchanger 50, storage tank 62 and inner side heat exchanger 50 successively, is then back to compressor 30.That is, internal exchanger 32 is used as heater and external heat exchanger 48 is used as evaporimeter.
When operating at air conditioning mode (refrigerating mode), the first bypass valve 36 and the second expansion valve 56 are opened, and the first expansion valve 34 and the second bypass valve 58 are closed.In addition, temperature adjustment doors 12 closes the passage of internal exchanger 32.Therefore, the cold-producing medium discharged from compressor 30 flows through the low-pressure side 54 of internal exchanger 32, first bypass valve 36, external heat exchanger 48, high-pressure side 52, second expansion valve 56 of inner side heat exchanger 50, evaporimeter 60, storage tank 62 and inner side heat exchanger 50 successively, is then back to compressor 30.That is, evaporimeter 60 is used as evaporimeter and is used as heater (identical with heat pump mode) by the internal exchanger 32 that temperature adjustment doors 12 is closed.
But, when traditional automobile-used heat pump, under heat pump mode (heating mode), the internal exchanger 32 being arranged on air-conditioning shell 10 inside is used as heater to perform heating, the external heat exchanger 48 being arranged on air-conditioning shell 10 outside (that is, being arranged on the front side place of the enging cabin of vehicle) is used as to carry out with outdoor air the evaporimeter of heat exchange.
In this example, if be incorporated into the temperature of temperature higher than outdoor air of the cold-producing medium in external heat exchanger 48, in other words, if the temperature of cold-producing medium is high, so due in external heat exchanger 48 frosting cause external heat exchanger 48 can not absorb heat in air outdoor and heat exchanger effectiveness reduces, therefore, the heating properties of heat pump and efficiency reduce.
In order to solve the problem, with reference to Fig. 2, will describe simply by a kind of Vehicular heat pump system disclosed in the 10-2012-0103054 Korean patent publication of same inventor's submission of the present invention.Vehicular heat pump system comprises: compressor 70, is arranged in refrigerant circulation lines 91, for compression and refrigerant emission; Internal exchanger 71, is arranged on air-conditioning shell 80 inside and is connected with the refrigerant circulation lines 91 of the outlet side of compressor 70, carries out heat exchange for making between the air of air-conditioning shell 80 internal flow and the cold-producing medium discharged from compressor 70; Evaporimeter 75, being arranged on air-conditioning shell 80 inside and being connected with the refrigerant circulation lines 91 of the entrance side of compressor 70, carrying out heat exchange for making between the air and the cold-producing medium being supplied to compressor 70 of air-conditioning shell 80 internal flow; External heat exchanger 73, is arranged on the outside of air-conditioning shell 80, carries out heat exchange for making to circulate through between the cold-producing medium of refrigerant circulation lines 91 and outdoor air; First expansion gear 72, in the refrigerant circulation lines 91 of the entrance side of heat exchanger 73 mounted externally, expands for optionally making the cold-producing medium being supplied to external heat exchanger 73 according to air conditioning mode or heat pump mode; Second expansion gear 74, is arranged in the refrigerant circulation lines 91 of the entrance side of evaporimeter 75, expands for making the cold-producing medium being supplied to evaporimeter 75; First by-pass line 92, the refrigerant circulation lines 91 of installing for the outlet side of the refrigerant circulation lines 91 and evaporimeter 75 making the entrance side of the second expansion gear 74 is connected to each other, and walks around the second expansion gear 74 and evaporimeter 75 to make cold-producing medium; First reversal valve 90, be arranged on the bifurcation place of the first by-pass line 92 and refrigerant circulation lines 91, for changing the flow direction of cold-producing medium, thus make the flow of refrigerant flowing through external heat exchanger 73 to the first by-pass line 92 or the second expansion gear 74 according to air conditioning mode or heat pump mode.
In addition, in order to dehumidify to the inside of vehicle in the heat pump mode, refrigerant circulation lines 91 and the first by-pass line 92 that dehumidifying line 94 is installed for making the entrance side of evaporimeter 75 are connected to each other, to make the part flowed through in the cold-producing medium of the first by-pass line 92 flow towards evaporimeter 75, and on-off valve 94a is arranged on dehumidifying line 94.
In addition, the second by-pass line 93 is installed according to the mode making the cold-producing medium flowing through the first expansion gear 72 walk around external heat exchanger 73.
Therefore, in outdoor temperature lower than zero degree or in external heat exchanger 73 when frosting, because cold-producing medium walks around external heat exchanger 73 by the second by-pass line 93, therefore the impact of the outdoor air of low temperature is made to minimize, in addition, owing to being reclaimed the used heat (waste heat) of electronic unit by heating plant 76, therefore heat pump can operate reposefully and improve heating properties.
In addition, in the heat pump mode, if need to dehumidify to the inside of vehicle, then open the on-off valve 94a of dehumidifying line 94, the cold-producing medium then expanded in the first expansion gear 72 flow to the first by-pass line 92 by external heat exchanger 73.In this example, flowing to a part of diverging flow in the cold-producing medium of the first by-pass line 92 to dehumidifying line 94 is supplied to evaporimeter 75, to perform dehumidifying to the inside of vehicle.
But the cold-producing medium expanded in the first expansion gear 72 carries out heat exchange with outdoor cold air and reduces pressure while flowing through external heat exchanger 73.Owing to almost there is no cold-producing medium in the heat pump mode in evaporimeter 75, finally, based on the on-off valve 94a of the dehumidifying line 94 of Fig. 2, the pressure of A side becomes the pressure lower than B side (evaporimeter), therefore, under dehumidification mode, in the first by-pass line 92, the cold-producing medium of flowing can not flow to evaporimeter 75 but reverse flow.Therefore, can not dehumidify to the inside of vehicle.
Summary of the invention
Therefore, the present invention is proposed to solve the problems referred to above occurred in the prior art, the object of the present invention is to provide a kind of Vehicular heat pump system, described Vehicular heat pump system comprises: dehumidifying line, part of refrigerant was wherein supplied to evaporimeter by the flow of refrigerant for circulating in refrigerant circulation lines after the first expansion gear before being introduced in external heat exchanger, to dehumidify to the inside of vehicle in the heat pump mode, thus when dehumidifying to the inside of vehicle, before being introduced in the external heat exchanger compared with evaporimeter with elevated pressures at cold-producing medium, cold-producing medium is allowed to flow to the evaporimeter of low pressure reposefully by dehumidifying line, and dehumidified in the inside of vehicle reposefully.
To achieve these goals, the invention provides a kind of Vehicular heat pump system, described Vehicular heat pump system comprises: compressor, is arranged in refrigerant circulation lines, for compression also refrigerant emission; Internal exchanger, is arranged on air-conditioning shell inner, for making the air of air-conditioning shell inside and carry out heat exchange between the cold-producing medium of compressor discharge; Evaporimeter, being arranged on air-conditioning shell inner, carrying out heat exchange for making between the air of air-conditioning shell inside and the cold-producing medium being supplied to compressor; External heat exchanger, being arranged on air-conditioning shell outside, carrying out heat exchange for making to cycle through between the cold-producing medium of refrigerant circulation lines and outdoor air; First expansion gear, being arranged in the refrigerant circulation lines between internal exchanger and external heat exchanger, expanding for making cold-producing medium; Second expansion gear, being arranged in the refrigerant circulation lines of the entrance side of evaporimeter, expanding for making cold-producing medium; By-pass line, is connected such mode according to the refrigerant circulation lines of the outlet side of the refrigerant circulation lines with evaporimeter that make the entrance side of the second expansion gear and installs, and walks around the second expansion gear and evaporimeter to make cold-producing medium in the heat pump mode; Dehumidifying line, be arranged in refrigerant circulation lines, for the part in the cold-producing medium circulated in refrigerant circulation lines is supplied to evaporimeter, to dehumidify to the inside of vehicle in the heat pump mode, wherein, the part flowed through in the cold-producing medium of the first expansion gear is supplied to evaporimeter by the line that dehumidifies.
According to a preferred embodiment of the invention, Vehicular heat pump system comprises: dehumidifying line, part of refrigerant was wherein supplied to evaporimeter by the flow of refrigerant for circulating in refrigerant circulation lines after the first expansion gear before being introduced in external heat exchanger, to dehumidify to the inside of vehicle in the heat pump mode, thus when dehumidifying to the inside of vehicle, before being introduced in the external heat exchanger compared with evaporimeter with elevated pressures at cold-producing medium, cold-producing medium is allowed to flow to the evaporimeter of low pressure reposefully by dehumidifying line, and dehumidified in the inside of vehicle reposefully.
In addition, the bypass runner of expansion valve and the outlet of first flow are formed collinearly, and to make hydrodynamic noise and the minimise loss of pressure of cold-producing medium, wherein, dehumidifying line is connected to the bypass runner of expansion valve.
In addition, the controller of on-off valve for the line that controls to dehumidify is installed to be, and under dehumidification mode, judging evaporimeter, whether frosting maybe closes on-off valve when sensing frosting, to avoid evaporating device frosting to enable heat pump.
In addition, the pipe diameter of dehumidifying line is less than the pipe diameter of the refrigerant circulation lines of the outlet side of the first expansion gear, or the pipe of dehumidifying line connects according to the mode that bifurcated above the pipe of refrigerant circulation lines is such, to make the amount from refrigerant circulation lines diverging flow to the cold-producing medium of dehumidifying line relatively few, thus guarantee heating properties.
Accompanying drawing explanation
By the detailed description of carrying out the preferred embodiments of the present invention below in conjunction with accompanying drawing, above and other objects, features and advantages of the present invention will be obvious, wherein:
Fig. 1 is the structure chart of traditional Vehicular heat pump system;
Fig. 2 is the structure chart of another traditional Vehicular heat pump system;
Fig. 3 is the structure chart of the air conditioning mode of Vehicular heat pump system according to a preferred embodiment of the invention;
Fig. 4 is the structure chart of the first heating mode of the heat pump mode of Vehicular heat pump system according to a preferred embodiment of the invention;
Fig. 5 is the structure chart of Vehicular heat pump system execution dehumidification mode while the first heating mode performing heat pump mode according to a preferred embodiment of the invention;
Fig. 6 is the structure chart of the second heating mode of the heat pump mode of Vehicular heat pump system according to a preferred embodiment of the invention;
Fig. 7 is the structure chart of Vehicular heat pump system execution dehumidification mode while the second heating mode performing heat pump mode according to a preferred embodiment of the invention;
Fig. 8 is the structure chart that the outlet of the dehumidifying line that Fig. 5 is shown is connected to the by-pass line of the second expansion gear;
Fig. 9 is the perspective view of the expansion valve of Fig. 8.
Detailed description of the invention
Now, with reference to the accompanying drawings the preferred embodiments of the present invention are described in detail.
First, Vehicular heat pump system according to the present invention is included in compressor 100, internal exchanger 110, first expansion gear 120, external heat exchanger 130, second expansion gear 140, evaporimeter 160 that refrigerant circulation lines (R) connects successively, and preferably, Vehicular heat pump system is applied to electric vehicle or motor vehicle driven by mixed power.
In addition, in refrigerant circulation lines (R), walk around the second expansion gear 140 and be connected in parallel respectively with the by-pass line (R1) of evaporimeter 160, the auxiliary bypass line (R2) walking around external heat exchanger 130, expansion line (R3) (the first expansion gear 120 is arranged on expansion line (R3)).
In addition, the first reversal valve 191 is arranged on the bifurcation place of by-pass line (R1), and the second reversal valve 192 is arranged on the bifurcation place of auxiliary bypass line (R2), and two-port valve 122 is arranged on the bifurcation place of expansion line (R3).
Therefore, under air conditioning mode, as shown in Figure 3, the cold-producing medium discharged from compressor 100 cycles through internal exchanger 110, external heat exchanger 130, second expansion gear 140, evaporimeter 160 and compressor 100 successively.
In this example, internal exchanger 110 is used as condenser and evaporimeter 160 is used as evaporimeter.
Meanwhile, identical with internal exchanger 110, external heat exchanger 130 is also used as condenser.
Under heat pump mode (the first heating mode), as shown in Figure 4, the cold-producing medium discharged from compressor 100 cycles through the aperture (orifice) 121 of internal exchanger 110, first expansion gear 120, external heat exchanger 130, by-pass line (R1) and compressor 100 successively.
In this example, internal exchanger 110 is used as condenser and external heat exchanger 130 is used as evaporimeter.Cold-producing medium is not supplied to the second expansion gear 140 and evaporimeter 160.
Simultaneously, when dehumidifying to the inside of vehicle in the heat pump mode, a part in the cold-producing medium of circulation in refrigerant circulation lines (R) is provided to evaporimeter 160, to dehumidify to the inside of vehicle by dehumidifying line (R4) (will be described after a while).
As mentioned above, heat pump according to a preferred embodiment of the invention, because air conditioning mode and heat pump mode have identical refrigerant circulation direction, refrigerant circulation lines (R) can be shared, prevent the stagnation of cold-producing medium and simplify refrigerant circulation lines (R).
Below, the parts according to Vehicular heat pump system of the present invention will be described in detail.
First, be arranged on compressor 100 in refrigerant circulation lines (R) and suck and compressed refrigerant while operating in the driving force by receiving from engine (explosive motor) or motor, then, the vapor phase refrigerant of discharge HTHP.
Compressor 100 sucks and compresses the cold-producing medium that discharges from evaporimeter 160 and cold-producing medium is supplied to internal exchanger 110 under air conditioning mode, and compressor 100 sucks in the heat pump mode and compresses and to discharge from external heat exchanger 130 and flow through the cold-producing medium of by-pass line (R1) and cold-producing medium is supplied to internal exchanger 110.
In addition, under the dehumidification mode of heat pump mode, because cold-producing medium is supplied with simultaneously by the evaporimeter 160 on by-pass line (R1) and dehumidifying line (R4), therefore compressor 100 sucks and is compressed in and flows through cold-producing medium that the evaporimeter 160 in by-pass line (R1) and dehumidifying line (R4) converges afterwards and cold-producing medium is supplied to internal exchanger 110.
Internal exchanger 110 is arranged on air-conditioning the shell 150 inner and refrigerant circulation lines (R) of outlet side with compressor 100 and is connected, to make at the air of air-conditioning shell 150 internal flow and to carry out heat exchange from the cold-producing medium that compressor 100 discharges.
In addition, evaporimeter 160 is arranged on the inside of air-conditioning shell 150 and the refrigerant circulation lines (R) of the entrance side with compressor 100 is connected, to make to carry out heat exchange at the air of air-conditioning shell 150 internal flow with the cold-producing medium being supplied to compressor 100.
Internal exchanger 110 under air conditioning mode and heat pump mode all as condenser.
Evaporimeter 160 is used as evaporimeter under air conditioning mode, but evaporimeter 160 stops being used as evaporimeter under first heating mode and the second heating mode of heat pump mode, its reason does not supply cold-producing medium to evaporimeter 160 under first heating mode and the second heating mode of heat pump mode, and evaporimeter 160 is used as evaporimeter under dehumidification mode, and its reason is, under dehumidification mode, the part in cold-producing medium is supplied to evaporimeter 160.
In addition, internal exchanger 110 and evaporimeter 160 are separated from each other according to predetermined space in air-conditioning shell 150 inside, and in this example, internal exchanger 110 and evaporimeter 160 are installed successively from the upstream side of the air-flow direction of air-conditioning shell 150 inside.
Therefore, as shown in Figure 3, under evaporimeter 160 is used as the air conditioning mode of evaporimeter, evaporimeter 160 is provided to from the cold-producing medium of the low-temp low-pressure of the second expansion gear 140 discharge, and in this example, while flowing through evaporimeter 160, being converted to cold air by carrying out heat exchange with the cold-producing medium of the low-temp low-pressure in evaporimeter 160 at the air of air-conditioning shell 150 internal flow by air blast (not shown), being then disposed to the inside of vehicle, thus making the internal cooling of vehicle.
As shown in Figure 4, under internal exchanger 110 is used as the heat pump mode (the first heating mode) of condenser, internal exchanger 110 is provided to from the cold-producing medium of the HTHP of compressor 100 discharge, and in this example, while flowing through internal exchanger 110, carry out heat exchange with the cold-producing medium of the HTHP in internal exchanger 110 at the air of air-conditioning shell 150 internal flow by air blast (not shown) and be converted into warm air, then the inside of vehicle is disposed to, thus the inside of heated vehicle.
Meanwhile, with regard to size, preferably, evaporimeter 160 is greater than internal exchanger 110.
In addition, between the evaporimeter 160 that regulates the temperature adjustment doors 151 of the air capacity walking around internal exchanger 110 and the air capacity flowing through internal exchanger 110 to be arranged on air-conditioning shell 150 inside and internal exchanger 110.
Temperature adjustment doors 151 regulates and walks around the air capacity of internal exchanger 110 and flow through the air capacity of internal exchanger 110, thus suitably controls the temperature of the air discharged from air-conditioning shell 150.
In this example, under air conditioning mode, as shown in Figure 3, when the front side channel of internal exchanger 110 is closed completely by temperature adjustment doors 151, walk around internal exchanger 110 due to the cold air flowing through evaporimeter 160 and be provided to the inside of vehicle, therefore farthest performing cooling.
Under heat pump mode (the first heating mode), as shown in Figure 4, when the passage walking around internal exchanger 110 is closed completely by temperature adjustment doors 151, because whole air is used as condenser flowing through internal exchanger 110() while be converted into warm air and warm air is provided to the inside of vehicle, therefore farthest perform heating.
In addition, external heat exchanger 130 is arranged on the outside of air-conditioning shell 150 and is connected with refrigerant circulation lines (R), to make to carry out heat exchange between the cold-producing medium of circulation in refrigerant circulation lines (R) and outdoor air.
Here, external heat exchanger 130 is arranged on the front side place of the enging cabin of vehicle, to make to carry out heat exchange between the cold-producing medium and outdoor air of external heat exchanger 130 internal flow.
Under air conditioning mode, identical with internal exchanger 110, external heat exchanger 130 is used as condenser, and in this example, is condensed while carrying out heat exchange with outdoor air at the cold-producing medium of the HTHP of external heat exchanger 130 internal flow.Under heat pump mode (the first heating mode), different from internal exchanger 110, external heat exchanger 130 is used as evaporimeter, and in this example, is evaporated while carrying out heat exchange with outdoor air at the cold-producing medium of the low temperature of external heat exchanger 130 internal flow.
In addition, the first expansion gear 120 is arranged in the refrigerant circulation lines (R) between internal exchanger 110 and external heat exchanger 130, expands optionally to make the cold-producing medium being supplied to external heat exchanger 130 according to air conditioning mode or heat pump mode.
That is, expansion line (R3) and the refrigerant circulation lines between internal exchanger 110 and external heat exchanger 130 (R) are installed in parallel, and in this example, the first expansion gear 120 has the aperture 121 be arranged on expansion line (R3).
In addition, two-port valve 122 is arranged on the bifurcation place of expansion line (R3) and refrigerant circulation lines (R), two-port valve 122 for changing the flow direction of cold-producing medium according to air conditioning mode or heat pump mode, with the cold-producing medium making to flow through internal exchanger 110 by expansion line (R3) through aperture 121 or walk around aperture 121.
Therefore, under air conditioning mode, to discharge and the cold-producing medium flowing through internal exchanger 110 is walked around aperture 121 by two-port valve 122 and is provided to external heat exchanger 130 from compressor 100.Under heat pump mode (the first heating mode), to discharge and the cold-producing medium flowing through internal exchanger 110 carries out expanding and being provided to external heat exchanger 130 while flowing through aperture 121 by two-port valve 122 from compressor 100.
Meanwhile, the two-port valve 122 of the first expansion gear 120 and aperture 121 can be formed according to separate mode or integral manner.
In addition, by-pass line (R1) is installed in this manner: the refrigerant circulation lines (R) of the refrigerant circulation lines (R) of the entrance side of the second expansion gear 140 and the outlet side of evaporimeter 160 is connected to each other, and optionally walks around the second expansion gear 140 and evaporimeter 160 to make the cold-producing medium cycling through refrigerant circulation lines (R).
As shown in the drawing, by-pass line (R1) is arranged in parallel with the second expansion gear 140 and evaporimeter 160.That is, the entrance side of by-pass line (R1) is connected to the refrigerant circulation lines (R) that external heat exchanger 130 and the second expansion gear 140 are connected to each other, and the outlet side of by-pass line (R1) is connected to the refrigerant circulation lines (R) that evaporimeter 160 and compressor 100 are connected to each other.
Result, under air conditioning mode, the cold-producing medium flowing through external heat exchanger 130 flows towards the second expansion gear 140 and evaporimeter 160, but, under heat pump mode (the first heating mode), the cold-producing medium flowing through external heat exchanger 130 is directly flowed towards compressor 100 by by-pass line (R1) and walks around the second expansion gear 140 and evaporimeter 160.
Here, realized by the first reversal valve 191 according to the flow direction of air conditioning mode and heat pump mode change cold-producing medium.
First reversal valve 191 is arranged on the bifurcation place of by-pass line (R1) and refrigerant circulation lines (R), to change the flow direction of cold-producing medium in this manner: the cold-producing medium flowing through external heat exchanger 130 flows towards by-pass line (R1) or the second expansion gear 140 according to air conditioning mode or heat pump mode.
In this example, under air conditioning mode, first reversal valve 191 changes the flow direction of cold-producing medium in this manner: to discharge and the cold-producing medium flowing through internal exchanger 110 and external heat exchanger 130 flows towards the second expansion gear 140 and evaporimeter 160 from compressor 100, and, under heat pump mode (the first heating mode), the first reversal valve 191 changes the flow direction of cold-producing medium in this manner: to discharge and the cold-producing medium flowing through internal exchanger 110, first expansion gear 120 and external heat exchanger 130 flows towards by-pass line (R1) from compressor 100.
Meanwhile, preferably, the first reversal valve 191 is made to be arranged on the bifurcation place of the entrance side of by-pass line (R1) and to use triple valve.
Except the first reversal valve 191 uses triple valve, preferably, the second reversal valve 192 preferably uses triple valve.
Heating plant 180 for heat being supplied to the cold-producing medium flowed along by-pass line (R1) is arranged on by-pass line (R1).
Heating plant 180 has water-cooling type heat exchanger 181, water-cooling type heat exchanger 181 comprises: refrigerant heat exchanger portion 181a, in by-pass line (R1), the flow of refrigerant of flowing is in refrigerant heat exchanger portion 181a, is supplied to the cold-producing medium of flowing in by-pass line (R1) with the used heat of the electronic unit 200 by vehicle; Cooling water heat exchanging part 181b, in electronic unit 200, the flow of cooling water of circulation is to cooling water heat exchanger 181b, and cooling water heat exchanging part 181b is arranged on the side place of refrigerant heat exchanger portion 181a.
Therefore, in the heat pump mode, heat pump can improve heating properties by the used heat retrieved from the electronic unit 200 of vehicle.
Meanwhile, there is motor, inverter and the miscellaneous part electronic unit 200 as vehicle.
In addition, storage tank 170 is arranged in the refrigerant circulation lines (R) of the entrance side of compressor 100.
Storage tank 170 cold-producing medium being supplied to compressor 100 is divided into liquid phase refrigerant and vapor phase refrigerant is also only supplied to compressor 100 by vapor phase refrigerant.
In addition, the electric heater 115 for improving the efficiency of heating surface is also arranged on the downstream of internal exchanger 110 in air-conditioning shell 150 inside.
That is, heat pump can improve heating properties by making when starting to start vehicle electric heater 115 as auxiliary thermal source running, and electric heater 115 also can be made to operate when heat pump lacks thermal source.
Preferably, electric heater 115 is ptc heaters.
In addition, auxiliary bypass line (R2) is installed in parallel with refrigerant circulation lines (R) in this manner: make the cold-producing medium flowing through the first expansion gear 120 optionally walk around external heat exchanger 130.
In other words, auxiliary bypass line (R2) is installed to be and connects the outlet side of external heat exchanger 130 and the refrigerant circulation lines (R) of entrance side, walks around external heat exchanger 130 to make the cold-producing medium cycling through refrigerant circulation lines (R).
In addition, the second reversal valve 192 for changing the flow direction of cold-producing medium is installed in this manner: make the cold-producing medium of circulation in refrigerant circulation lines (R) optionally flow to auxiliary bypass line (R2).
Second reversal valve 192 is arranged on the bifurcation place of auxiliary bypass line (R2) and refrigerant circulation lines (R), to change the flow direction of cold-producing medium, thus makes cold-producing medium heat exchanger 130 or auxiliary bypass line (R2) flowing towards the outside.
In this example, when frosting or when outdoor temperature is lower than zero degree in external heat exchanger 130, because external heat exchanger 130 can not air intake be warm outdoor reposefully, therefore the second reversal valve 192 makes the cold-producing medium of circulation in refrigerant circulation lines (R) walk around external heat exchanger 130.
Meanwhile, without the need to making outdoor temperature substantially be 0 DEG C.When heat exchange efficiency only between outdoor air and the cold-producing medium of flowing in external heat exchanger 130 is good, heat pump just makes flow of refrigerant through external heat exchanger 130, and heat pump makes cold-producing medium detour to pass through when heat exchange efficiency is bad, thus improve heating properties and efficiency.
In addition, in external heat exchanger 130 when frosting, when flow of refrigerant is to auxiliary bypass line (R2) and when walking around external heat exchanger 130, frosting can be made to postpone or remove frosting.
In addition, dehumidifying line (R4) is arranged in refrigerant circulation lines (R), for the part in the cold-producing medium of circulation in refrigerant circulation lines (R) is supplied to evaporimeter 160, to perform dehumidifying to the inside of vehicle.
In this example, in order to dehumidify to the inside of vehicle, because the cold-producing medium of low temperature must be supplied to evaporimeter 160, the line that therefore dehumidifies (R4) is connected to the part of cold-producing medium circulation in refrigerant circulation lines (R) of low temperature.
More particularly, the part flowed through in the cold-producing medium of the first expansion gear 120 is supplied to evaporimeter 160 by the line (R4) that dehumidifies.
In other words, the line (R4) that dehumidifies makes the refrigerant circulation lines (R) of the refrigerant circulation lines (R) of the outlet side of the first expansion gear 120 and the entrance side of evaporimeter 160 be connected to each other.
In the accompanying drawings, the entrance of dehumidifying line (R4) is connected to the refrigerant circulation lines (R) between the first expansion gear 120 and external heat exchanger 130, flow to dehumidifying line (R4) to make the part in cold-producing medium and is provided to evaporimeter 160 after flowing through the first expansion gear 120 before being introduced in external heat exchanger 130.
In addition, under dehumidification mode, a part in the cold-producing medium of circulation in refrigerant circulation lines (R) is supplied to evaporimeter 160 by dehumidifying line (R4), and in this example, in order to ensure heating properties, the amount from refrigerant circulation lines (R) diverging flow to the cold-producing medium of dehumidifying line (R4) must be relatively less.
Therefore, in order to make diverging flow be less than the flow of the cold-producing medium of circulation in refrigerant circulation lines (R) to the amount of cold-producing medium of dehumidifying line (R4), ensuing two kinds of methods can be used.
The first: the pipe diameter of dehumidifying line (R4) is less than the pipe diameter of the refrigerant circulation lines (R) of the outlet side of the first expansion gear 120, and the quantitative change of arriving the cold-producing medium of the line (R4) that dehumidifies to make diverging flow is few.
The second: the pipe of dehumidifying line (R4) connects according to the mode of bifurcated above the pipe of refrigerant circulation lines (R), makes diverging flow arrive the quantitative change of cold-producing medium of dehumidifying line (R4) few.
That is, if the pipe of dehumidifying line (R4) connects according to the mode of bifurcated above the pipe of refrigerant circulation lines (R), so when the cold-producing medium of circulation in the refrigerant circulation lines (R) is towards when being positioned at dehumidifying line (R4) bifurcated of top, diverging flow tails off to the amount of the cold-producing medium of the line (R4) that dehumidifies due to gravity (own wt).
In addition, the on-off valve 195 opening and closing dehumidifying line (R4) is arranged in dehumidifying line (R4), flow to dehumidifying line (R4) only to enable the part flowed through in the cold-producing medium of the first expansion gear 120 under dehumidification mode.
In addition, heat pump also comprises the controller (not shown) for controlling on-off valve 195.
Controller only opens dehumidifying line (R4) by opening on-off valve 195 under dehumidification mode, and closes dehumidifying line (R4) by closing on-off valve 195 under the pattern not being dehumidification mode.
In addition, under dehumidification mode, when determining evaporimeter 160 frosting or sensing frosting, controller cuts out on-off valve 195, thus stops the cold-producing medium being supplied to evaporimeter 160 by dehumidifying line (R4), to prevent from making evaporimeter 160 frosting under dehumidification mode.
As mentioned above, under dehumidification mode, be supplied to evaporimeter 160 in the part of flow of refrigerant after the first expansion gear 120 before being introduced in external heat exchanger 130 in cold-producing medium by dehumidifying line (R4).In this case, because the cold-producing medium of flowing in dehumidifying line (R4) is introduced in the cold-producing medium before external heat exchanger 130, in other words, because the cold-producing medium of flowing in dehumidifying line (R4) does not also carry out heat exchange with the outdoor cold air in external heat exchanger 130, therefore, in dehumidifying line (R4) pressure of the cold-producing medium of flowing higher than the pressure of evaporimeter 160.
That is, with reference to Fig. 5, based on the on-off valve 195 of dehumidifying line (R4), due under dehumidification mode, when on-off valve 195 is opened, the pressure of C side is higher than the pressure of D side (vaporizer side), and the part therefore flowed through in the cold-producing medium of the first expansion gear 120 flow to the evaporimeter 160 of low pressure reposefully by dehumidifying line (R4), therefore, heat pump can perform dehumidifying to the inside of vehicle reposefully.
In addition, as shown in Fig. 3 to Fig. 7, the outlet of dehumidifying line (R4) is connected to the refrigerant circulation lines (R) of the entrance side of evaporimeter 160, or as shown in Figure 8, the outlet of dehumidifying line (R4) is connected to the second expansion gear 140.
In Fig. 3 to Fig. 7, the outlet of dehumidifying line (R4) is connected with the refrigerant circulation lines (R) between the second expansion gear 140 and evaporimeter 160.Therefore, the cold-producing medium flowing through dehumidifying line (R4) is directly introduced in evaporimeter 160.
In fig. 8, the outlet of dehumidifying line (R4) is connected with the second expansion gear 140, but in this example, the cold-producing medium flowing through dehumidifying line (R4) does not expand in the second expansion gear 140, but is introduced in evaporimeter 160.
That is, as shown in Figure 9, the second expansion gear 140 comprises expansion valve 140a, and expansion valve 140a has the expansion runner 144 for making cold-producing medium expand and the bypass runner 147 for making cold-producing medium walk around expansion runner 144.
In this example, the outlet of dehumidifying line (R4) is connected with the bypass runner 147 of expansion valve 140a, and the cold-producing medium flowing through dehumidifying line (R4) is walked around expansion runner 144 by bypass runner 147 and is provided to evaporimeter 160.
With reference to Fig. 9, the expansion valve 140a of the second expansion gear 140 will be described briefly.Expansion valve 140a comprises: main body 141, there is first flow 142 and the second runner 143, and first flow 142 has the expansion runner 144 that cold-producing medium for making to be supplied to evaporimeter 160 expands, the flow of refrigerant of discharging from evaporimeter 160 is to the second runner 143; Valve body 145, is arranged on main body 141 inner, regulates the amount of the cold-producing medium flowing through expansion runner 144 for the opening degree by controlling expansion runner 144; Bar 146, is liftably arranged on main body 141 inner, for the variations in temperature according to the outlet side the cold-producing medium flowed in the second runner 143 that carry out flash-pot 160, valve body 145 is elevated.
Here, the main body 141 of expansion valve 140a comprises: entrance 142a, for cold-producing medium is incorporated into expansion runner 144; Outlet 142b, for discharging the cold-producing medium flowing through expansion runner 144.
Inner in main body 141, entrance 142a and outlet 142b arranges with the angle in 90 degree, and in this example, entrance 142a and outlet 142b is separated from each other along vertical direction according to predetermined space, and the runner 144 that expands is formed between entrance 142a and outlet 142b.
In addition, according to the variations in temperature of the cold-producing medium of flowing in the second runner 143, the dividing plate (diaphragm, not shown) that arranges is arranged on the upper end of main body 141.Therefore, valve body 145 is made to operate at bar 146 while rising and declining according to the displacement of dividing plate.
In addition, the bypass runner 147(line (R4) that dehumidifies is connected to bypass runner 147) be formed in main body 141, and to be arranged on the downstream of expansion runner 144 along the flow direction of cold-producing medium with the outlet 142b(of first flow 142) be communicated with.
In this example, the entrance 147a of bypass the runner 147 and outlet 142b of first flow 142 arranges collinearly.
In other words, the entrance 147a of bypass the runner 147 and outlet 142b of first flow 142 is formed according to straight line.
Therefore, the cold-producing medium flowing through dehumidifying line (R4) is walked around the expansion runner 144 of the second expansion gear 140 by bypass runner 147 and is directly supplied to evaporimeter 160.
In addition, because the outlet 142b of bypass runner 147 with first flow 142 is formed according to straight line, therefore heat pump can make hydrodynamic noise and the minimise loss of pressure of cold-producing medium.
Meanwhile, because the outlet of dehumidifying line (R4) is inserted in the bypass runner 147 of the second expansion gear 140, the line (R4) that therefore dehumidifies can be assembled simply, and the quantity minimizing of parts and the weight of system can be made to reduce due to simple syndeton.
Below, by the operation (action) of description Vehicular heat pump system according to a preferred embodiment of the invention.
A air conditioning mode (refrigerating mode) (see figure 3)
Under air conditioning mode (refrigerating mode), as shown in Figure 3, close auxiliary bypass line (R2) by the second reversal valve 192, and also close by-pass line (R1) by the first reversal valve 191, and two-port valve 122 cuts out aperture 121.
In addition, the cooling water circulating through electronic unit 200 is not supplied to the water-cooling type heat exchanger 181 of heating plant 180.
Simultaneously, in order to realize maximum cooling, the temperature adjustment doors 151 of air-conditioning shell 150 inside closes the passage flowing through internal exchanger 110, to make the air be blown in air-conditioning shell 150 by air blast be cooled while flowing through evaporimeter 160 and be supplied to the inside of vehicle by walking around internal exchanger 110, thus make the internal cooling of vehicle.
Next, refrigerant circulating process will be described.
In compressor 100, after compression, the vapor phase refrigerant of the HTHP of discharge is provided to the internal exchanger 110 being arranged on air-conditioning shell 150 inside.
As shown in Figure 3, because temperature adjustment doors 151 closes the passage of internal exchanger 110, the cold-producing medium being therefore supplied to internal exchanger 110 directly flow to external heat exchanger 130 when not carrying out heat exchange with air.
The cold-producing medium flowing to external heat exchanger 130 is condensed while carrying out heat exchange with outdoor air, and therefore, vapor phase refrigerant is converted to liquid phase refrigerant.
Meanwhile, internal exchanger 110 and external heat exchanger 130 are all as condenser, but cold-producing medium is mainly carrying out condensation in the external heat exchanger 130 of heat exchange with outdoor air.
Then, the cold-producing medium flowing through external heat exchanger 130 reduces pressure and expands while flowing through the second expansion gear 140, thus becomes the liquid phase refrigerant of low-temp low-pressure, is then introduced in evaporimeter 160.
The cold-producing medium be incorporated in evaporimeter 160 evaporates by carrying out heat exchange with the air be blown into by air blast in air-conditioning shell 150, and simultaneously, Air flow is made owing to carrying out heat absorption by the evaporation latent heat of cold-producing medium, then, the air of cooling is provided to the inside of vehicle, to make the internal cooling of vehicle.
Then, the cold-producing medium discharged from evaporimeter 160 to be introduced in compressor 100 and to repeat above-mentioned circulation.
First heating mode (see figure 4) of B heat pump mode
When first heating mode of heat pump mode operates at and external heat exchanger 130 does not exist frosting or outdoor temperature higher than zero degree.As shown in Figure 4, close auxiliary bypass line (R2) by the second reversal valve 192 and open by-pass line (R1) by the first reversal valve 191, making cold-producing medium not be provided to the second expansion gear 140 and evaporimeter 160.
In addition, aperture 121 is opened by two-port valve 122.
Meanwhile, the chilled(cooling) water supply (CWS) of being heated by the electronic unit 200 of vehicle is to the cooling water heat exchanging part 181b of the water-cooling type heat exchanger 181 of heating plant 180.
In addition, under the first heating mode, the temperature adjustment doors 151 of air-conditioning shell 150 inside closes the passage walking around internal exchanger 110, shut down to make being blown into air in air-conditioning shell 150 flowing through evaporimeter 160(from air blast) after flow through internal exchanger 110 while become warm air, then the inside of vehicle is supplied to, with the inside of heated vehicle.
Next, refrigerant circulating process will be described.
In compressor 100, after compression, the vapor phase refrigerant of the HTHP of discharge is introduced in the internal exchanger 110 being arranged on air-conditioning shell 150 inside.
The vapor phase refrigerant being incorporated into the HTHP in internal exchanger 110 is condensed while carrying out heat exchange with the air be blown into by air blast in air-conditioning shell 150, and in this example, the air flowing through internal exchanger 110 is converted into warm air and is supplied to the inside of vehicle, thus the inside of heated vehicle.
Then, the cold-producing medium discharged from internal exchanger 110 reduces pressure and expands while flowing through aperture 121 by two-port valve 122, thus becomes the liquid phase refrigerant of low-temp low-pressure, then, is provided to the external heat exchanger 130 as evaporimeter.
The cold-producing medium being supplied to external heat exchanger 130 is evaporated and is flowed through by-pass line (R1) by the first reversal valve 191 while carrying out heat exchange with outdoor air.In this example, the cold-producing medium flowing through by-pass line (R1) carries out heat exchange with the cooling water flowing through cooling water heat exchanging part 181b while flowing through the refrigerant heat exchanger portion 181a of water-cooling type heat exchanger 181, to reclaim the used heat of the electronic unit 200 of vehicle, then, cold-producing medium is introduced in compressor 100, to repeat above-mentioned circulation.
The dehumidification mode (see figure 5) of the first heating mode of C heat pump mode
The dehumidification mode of the first heating mode of heat pump mode only under the first heating mode that system operates at Fig. 4 while need to operate when dehumidifying to the inside of vehicle.
Therefore, only the part different from first heating mode of Fig. 4 will be described.
Under dehumidification mode, under the state of the first heating mode running, open dehumidifying line (R4) in addition by on-off valve 195.
In addition, the temperature adjustment doors 151 of air-conditioning shell 150 inside closes the passage walking around internal exchanger 110.Therefore, the air be blown in air-conditioning shell 150 by air blast is cooled while flowing through evaporimeter 160, then, while flowing through internal exchanger 110, become warm air and be provided to the inside of vehicle, heating to enable the inside of heat pump to vehicle.
In this example, due to be supplied to the cold-producing medium of evaporimeter 160 amount less and Air flow performance is low, therefore make the change of indoor temperature minimize, reposefully the air flowing through evaporimeter 160 dehumidified to enable heat pump.
Next, the cyclic process of cold-producing medium will be described.
The part flowed through in the cold-producing medium in the aperture 121 of compressor 100, internal exchanger 110 and the first expansion gear 120 flows through external heat exchanger 130, and the remainder in cold-producing medium flows through dehumidifying line (R4).
The cold-producing medium flowing through external heat exchanger 130 is evaporated while carrying out heat exchange with outdoor air, then, flows through by-pass line (R1) by the first reversal valve 191.In this example, the cold-producing medium flowing through by-pass line (R1) carries out heat exchange with the cooling water flowing through cooling water heat exchanging part 181b while flowing through the refrigerant heat exchanger portion 181a of water-cooling type heat exchanger 181, to make cold-producing medium evaporate while the used heat of electronic unit 200 reclaiming vehicle.
The cold-producing medium flowing through dehumidifying line (R4) is supplied to evaporimeter 160, and is evaporated while carrying out heat exchange with the air in air-conditioning shell 150 internal flow.
In above process, the air flowing through evaporimeter 160 is dehumidified, and dehumidified air becomes warm air while flowing through internal exchanger 110, then, is supplied to the inside of vehicle to perform heating.
Then, flow through respectively water-cooling type heat exchanger 181 converge to the cold-producing medium of evaporimeter 160 together with and be introduced in compressor 100, then, repeat above-mentioned circulation.
Second heating mode (see figure 6) of D heat pump mode
When second heating mode of heat pump mode operates at that in external heat exchanger 130, frosting or outdoor temperature are lower than zero degree.As shown in Figure 6, open auxiliary bypass line (R2) by the second reversal valve 192 and open by-pass line (R1) by the first reversal valve 191.
In addition, close dehumidifying line (R4) by on-off valve 195, open aperture 121 by two-port valve 122, and patten transformation is room air inflow pattern, for being incorporated in air-conditioning shell 150 by room air.
Meanwhile, the chilled(cooling) water supply (CWS) of being heated by the electronic unit 200 of vehicle is to the cooling water heat exchanging part 181b of the water-cooling type heat exchanger 181 of heating plant 180.
In addition, under the second heating mode, the temperature adjustment doors 151 of air-conditioning shell 150 inside closes the passage walking around internal exchanger 110, shut down to make being blown into air in air-conditioning shell 150 flowing through evaporimeter 160(from air blast) after flow through internal exchanger 110 while become warm air, then the inside of vehicle is supplied to, with the inside of heated vehicle.
Next, refrigerant circulating process will be described.
In compressor 100, after compression, the vapor phase refrigerant of the HTHP of discharge is introduced in the internal exchanger 110 being arranged on air-conditioning shell 150 inside.
The vapor phase refrigerant being incorporated into the HTHP in internal exchanger 110 is condensed while carrying out heat exchange with the air be blown into by air blast in air-conditioning shell 150, and in this example, the air flowing through internal exchanger 110 is converted to warm air and is provided to the inside of vehicle, thus heats the inside of vehicle.
Then, the cold-producing medium discharged from internal exchanger 110 reduces pressure and expands while flowing through aperture 121 by two-port valve 122, thus becomes the liquid phase refrigerant of low-temp low-pressure.Then, flow of refrigerant walks around external heat exchanger 130 to auxiliary bypass line (R2).
Then, the cold-producing medium flowing through auxiliary bypass line (R2) flows through by-pass line (R1) by the first reversal valve 191.In this example, the cold-producing medium flowing through by-pass line (R1) carries out heat exchange with the cooling water flowing through cooling water heat exchanging part 181b while flowing through the refrigerant heat exchanger portion 181a of water-cooling type heat exchanger 181, to reclaim the used heat of the electronic unit 200 of vehicle, then, cold-producing medium is incorporated in compressor 100, to repeat above-mentioned circulation.
The dehumidification mode (see figure 7) of the second heating mode of E heat pump mode
The dehumidification mode of the second heating mode of heat pump mode only under the second heating mode that system operates at Fig. 6 while need to operate when dehumidifying to the inside of vehicle.
Therefore, only the part different from second heating mode of Fig. 6 will be described.
Under dehumidification mode, under the state of the second heating mode running, open dehumidifying line (R4) additionally by on-off valve 195.
In addition, the temperature adjustment doors 151 of air-conditioning shell 150 inside closes the passage walking around internal exchanger 110.Therefore, the air be blown in air-conditioning shell 150 by air blast is cooled while flowing through evaporimeter 160, then while flowing through internal exchanger 110, become warm air and be provided to the inside of vehicle, heating to enable the inside of heat pump to vehicle.
In this example, due to be supplied to the cold-producing medium of evaporimeter 160 amount less and Air flow performance is low, therefore make the change of indoor temperature minimize, thus heat pump can dehumidify reposefully to the air flowing through evaporimeter 160.
Next, refrigerant circulating process will be described.
The part flowed through in the cold-producing medium in the aperture 121 of compressor 100, internal exchanger 110 and the first expansion gear 120 walks around external heat exchanger 130 by auxiliary bypass line (R2), and the remainder of cold-producing medium flows through dehumidifying line (R4).
The cold-producing medium flowing through auxiliary bypass line (R2) flows through by-pass line (R1) by the first reversal valve 191.In this example, the cold-producing medium flowing through by-pass line (R1) carries out heat exchange with the cooling water flowing through cooling water heat exchanging part 181b while flowing through the refrigerant heat exchanger portion 181a of water-cooling type heat exchanger 181, to make cold-producing medium evaporate while the used heat of electronic unit 200 reclaiming vehicle.
The cold-producing medium flowing through dehumidifying line (R4) is supplied to evaporimeter 160, and is evaporated while carrying out heat exchange with the air in air-conditioning shell 150 internal flow.
In above process, the air flowing through evaporimeter 160 is dehumidified, and dehumidified air becomes warm air while flowing through internal exchanger 110, then, is provided to the inside of vehicle, to perform heating.
Then, flow through respectively water-cooling type heat exchanger 181 converge to the cold-producing medium of evaporimeter 160 together with and be incorporated in compressor 100, then, repeat above-mentioned circulation.
Claims (10)
1. a Vehicular heat pump system, comprising:
Compressor (100), is arranged in refrigerant circulation lines (R), for compression and refrigerant emission;
Internal exchanger (110), is arranged on air-conditioning shell (150) inner, for make the inner air of air-conditioning shell (150) and discharge from compressor (100) cold-producing medium between carry out heat exchange;
Evaporimeter (160), is arranged on air-conditioning shell (150) inner, carries out heat exchange for making between the inner air of air-conditioning shell (150) and the cold-producing medium being supplied to compressor (100);
External heat exchanger (130), is arranged on the outside of air-conditioning shell (150), carries out heat exchange for making to circulate through between the cold-producing medium of refrigerant circulation lines (R) and outdoor air;
First expansion gear (120), being arranged in the refrigerant circulation lines (R) that is positioned between internal exchanger (110) and external heat exchanger (130), expanding for making cold-producing medium;
Second expansion gear (140), being arranged in the refrigerant circulation lines (R) of the entrance side of evaporimeter (160), expanding for making cold-producing medium;
By-pass line (R1), be connected such mode according to the refrigerant circulation lines (R) of the refrigerant circulation lines (R) with the outlet side of evaporimeter (160) that make the entrance side of the second expansion gear (140) to install, walk around the second expansion gear (140) and evaporimeter (160) to make cold-producing medium in the heat pump mode;
Dehumidifying line (R4), is arranged in refrigerant circulation lines (R), for the part in the cold-producing medium of circulation in refrigerant circulation lines (R) is supplied to evaporimeter (160), to dehumidify to the inside of vehicle in the heat pump mode,
Wherein, the part flowed through in the cold-producing medium of the first expansion gear (120) is supplied to evaporimeter (160) by the line (R4) that dehumidifies.
2. heat pump according to claim 1, wherein, dehumidifying line (R4) makes the refrigerant circulation lines (R) of the refrigerant circulation lines (R) of the outlet side of the first expansion gear (120) and the entrance side of evaporimeter (160) be connected to each other.
3. heat pump according to claim 1, wherein, second expansion gear (140) comprising: expansion valve (140a), and expansion valve (140a) has the expansion runner (144) for making cold-producing medium expand and the bypass runner (147) for making cold-producing medium walk around expansion runner (144)
Wherein, dehumidifying line (R4) makes the refrigerant circulation lines (R) of the outlet side of the first expansion gear (120) and the bypass runner (147) of expansion valve (140a) be connected to each other, and is walked around expansion runner (144) to make the cold-producing medium flowing through dehumidifying line (R4) and is provided to evaporimeter (160) by bypass runner (147).
4. heat pump according to claim 3, wherein, expansion valve (140a) comprising: entrance (142a), for being incorporated into by cold-producing medium in expansion runner (144); Outlet (142b), for the discharge refrigerant of expansion runner (144) will be flowed through,
Wherein, entrance and the described outlet (142b) of bypass runner (147) are arranged collinearly, and wherein, dehumidifying line (R4) is connected to the entrance of bypass runner (147).
5. heat pump according to claim 1, wherein, on-off valve (195) for opening and closing dehumidifying line (R4) is arranged on dehumidifying line (R4), make to flow through a part in the cold-producing medium of the first expansion gear (120) only in dehumidification mode current downflow to the line (R4) that dehumidifies.
6. heat pump according to claim 5, described heat pump also comprises:
Controller, for controlling on-off valve (195), and under dehumidification mode, when determining or sense evaporimeter (160) frosting, controller controls on-off valve (195) cuts out, and passes through dehumidifying line (R4) be supplied to evaporimeter (160) to prevent cold-producing medium.
7. heat pump according to claim 1, wherein, the pipe diameter of dehumidifying line (R4) is less than the pipe diameter of the refrigerant circulation lines (R) of the outlet side of the first expansion gear (120).
8. heat pump according to claim 1, wherein, the pipe of dehumidifying line (R4) connects according to the mode that bifurcated above the pipe of the refrigerant circulation lines (R) of the outlet side at the first expansion gear (120) is such.
9. heat pump according to claim 1, wherein, heating plant (180) is arranged on by-pass line (R1), is supplied to the used heat of the electronic unit (200) by vehicle the cold-producing medium flowed along by-pass line (R1).
10. heat pump according to claim 1, wherein, auxiliary bypass line (R2) is arranged in refrigerant circulation lines (R), to make the cold-producing medium flowing through the first expansion gear (120) walk around external heat exchanger (130) during frosting in external heat exchanger (130).
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| Publication number | Publication date |
|---|---|
| CN104949385B (en) | 2017-08-25 |
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