CN114274731B - Ultra-low temperature heat pump air conditioner control system and method and electric automobile - Google Patents
Ultra-low temperature heat pump air conditioner control system and method and electric automobile Download PDFInfo
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- CN114274731B CN114274731B CN202111652638.XA CN202111652638A CN114274731B CN 114274731 B CN114274731 B CN 114274731B CN 202111652638 A CN202111652638 A CN 202111652638A CN 114274731 B CN114274731 B CN 114274731B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 125
- 239000002918 waste heat Substances 0.000 claims description 47
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 12
- 239000003507 refrigerant Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 239000002826 coolant Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000013526 supercooled liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- -1 and particularly Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses an ultra-low temperature heat pump air conditioner control system and method and an electric automobile, wherein the control system comprises: an indoor condenser, an outdoor heat exchanger, a compressor, a pipeline, an evaporator, a gas-liquid separator, a cooler and an electronic expansion valve; the high-pressure sensor is arranged at the exhaust port of the compressor, and the low-pressure sensor is arranged at the air inlet of the gas-liquid separator; the air conditioner is divided into two paths from an air outlet of the compressor, wherein one path is provided with a first normally open electromagnetic valve and communicated with the indoor condenser, and the other path is provided with a second normally open electromagnetic valve and communicated with the outdoor heat exchanger; a normally closed third electromagnetic valve is arranged between the outdoor heat exchanger and the pipeline connection; a fourth electromagnetic valve which is normally open is arranged at the inlet of the evaporator; one port of the cooler is connected with the electronic expansion valve and then is divided into two paths, one path is connected with the outdoor heat exchanger, and the other path is connected with the evaporator. The invention solves the heat dissipation problem of the super-fast charging system, thereby improving the refrigerating capacity.
Description
Technical Field
The invention relates to the field of heat pump air conditioners, in particular to an ultra-low temperature heat pump air conditioner control system and method and an electric automobile.
Background
With the development of electric vehicle thermal management technology, a heat pump air conditioner is an important thermal management measure for heating and saving energy in winter. The heating in winter of the ordinary air conditioner mainly uses PTC heating, whether it is air heating PTC or water heating PTC, the electric energy is basically directly converted into heat energy through PTC sheets, the theoretical efficiency is 100%, but the calculated loss is only 90% in practice. Whereas the efficiency of the heat pump air conditioner is 200%. According to big data in industry, PTC average energy consumption in winter is about 2kw, heat pump air conditioner average energy consumption is about 1kw, and energy saving is about 50%. The current heat pump air conditioner adopting R134a refrigerant can only be used for the environment temperature above-10 ℃ and auxiliary PTC is added at lower temperature. Most of the current use areas of electric automobiles are in the southern areas of Beijing, but even if Beijing is taken as an example, the lowest air temperature in winter can reach-20 ℃, and the heating energy conservation of the ambient temperature of-20 ℃ to-10 ℃ is an important proposition.
In the prior art, an electric heat pump air conditioning system adopts 3 heat exchangers to realize the flow direction switching of the refrigerant through two SOVs.
The prior art has the following defects:
1. the heat pump system can only work at the temperature above-10 ℃ of the environment;
2. the battery, the motor and the air conditioner are mutually independent, integrated heat management is not formed, and the energy-saving effect is limited;
3. the super fast charging of heavy current has huge heat productivity, and the heat dissipation capability of the existing architecture is obviously insufficient.
Disclosure of Invention
The invention aims to provide an ultra-low temperature heat pump air conditioner control system and method and a novel technical scheme of an electric automobile.
According to a first aspect of the present invention, there is provided an ultra low temperature heat pump air conditioner control system comprising an indoor condenser, an outdoor heat exchanger, a compressor, a pipeline, an evaporator, a gas-liquid separator, a cooler and an electronic expansion valve; a high-pressure sensor is arranged at the exhaust port of the compressor, and a low-pressure sensor is arranged at the air inlet of the gas-liquid separator; dividing the exhaust port of the compressor into two paths, wherein one path is provided with a first normally open electromagnetic valve and communicated with an indoor condenser, and the other path is provided with a second normally open electromagnetic valve and communicated with the outdoor heat exchanger; a normally closed third electromagnetic valve is arranged between the outdoor heat exchanger and the pipeline connection; a fourth electromagnetic valve which is normally open is arranged at the inlet of the evaporator;
one port of the cooler is connected with the electronic expansion valve and then is divided into two paths, one path of the cooler is connected with the outdoor heat exchanger, and the other path of the cooler is connected with the evaporator; the electronic expansion valve is arranged to realize the on-off of indoor refrigeration and battery refrigeration.
Optionally, a first check valve is arranged between the electronic expansion valve and the outdoor heat exchanger.
Optionally, a second check valve is arranged between the connection of the indoor condenser and the outdoor heat exchanger.
Optionally, a first throttle pipe is arranged between the outdoor heat exchanger and the second one-way valve; a second throttle tube is disposed between the evaporator and the fourth solenoid valve.
Optionally, the circulating medium of the control system is a cooling liquid.
Optionally, the system further comprises a water side loop, wherein the water side loop is used as a loop for heat pump waste heat recovery heat management, and the medium is water; the waterside circuit includes: the integrated kettle, the five-way valve, the waste heat recoverer, the water heater, the battery, the motor and the radiator;
the water gap of the integrated kettle comprises: a battery water inlet, a battery water outlet, a motor water inlet, a radiator water outlet, a radiator water inlet and a motor water outlet;
the five-way valve comprises a first valve port, a second valve port, a third valve port, a fourth valve port and a fifth valve port;
the first valve port is correspondingly communicated with the battery water inlet, the second valve port is correspondingly communicated with the battery water outlet, the third valve port is correspondingly communicated with the motor water inlet, the fourth valve port is correspondingly communicated with the radiator water outlet, and the fifth valve port is selectively correspondingly communicated with the radiator water inlet or the motor water outlet;
the battery water inlet is sequentially connected with the cooler, the water heater and the battery water outlet;
the water inlet of the motor is sequentially connected with the motor, the waste heat recoverer and the water outlet of the motor;
the radiator water inlet is connected with the radiator and the radiator water outlet in sequence.
Optionally, the waste heat recoverer is connected in series with an outdoor heat exchanger.
Optionally, an electronic three-way water valve is arranged between the motor and the waste heat recoverer, and a third port of the electronic three-way water valve is directly connected with a water outlet of the motor.
According to a second aspect of the present invention, there is provided an ultralow temperature heat pump air conditioner control method, to which the ultralow temperature heat pump air conditioner control system according to the first aspect of the present invention is applied, specifically the method includes:
indoor cooling mode: closing the first electromagnetic valve and the third electromagnetic valve, and opening the second electromagnetic valve and the fourth electromagnetic valve, wherein the waterway of the waste heat recoverer does not participate in circulation;
super fast charge mode: closing the first electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve, opening the second electromagnetic valve and opening the electronic expansion valve; simultaneously, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the fifth valve port is closed;
heating at normal temperature: opening the first electromagnetic valve and the third electromagnetic valve, and closing the second electromagnetic valve and the fourth electromagnetic valve;
mode of low-temperature heating and motor waste heat recovery simultaneously: opening the first electromagnetic valve and the third electromagnetic valve, closing the second electromagnetic valve and the fourth electromagnetic valve, simultaneously enabling the third valve port to be communicated with a fifth valve port, enabling the fifth valve port to be communicated with a water outlet of the motor, enabling the first valve port to be communicated with the second valve port, and closing the fourth valve port;
mode of low-temperature heating and simultaneous recovery of motor and battery waste heat: opening the first electromagnetic valve and the third electromagnetic valve, closing the second electromagnetic valve and the fourth electromagnetic valve, simultaneously, enabling the second valve port to be communicated with a third valve port, enabling the first valve port to be communicated with a fifth valve port, enabling the fifth valve port to be communicated with a water inlet of the radiator, and closing the fourth valve port; the waste heat recoverer is connected with the water loop of the motor in series.
According to a third aspect of the present invention, there is provided an electric vehicle comprising the ultra-low temperature heat pump air conditioner control system according to any one of the first aspect of the present invention.
According to one embodiment of the present disclosure, the following beneficial effects are provided: according to the invention, the environment temperature of the heat pump air conditioner is widened, the heat pump air conditioner is used as a basis, and the energy of the environment, the passenger cabin, the drive and the battery is comprehensively utilized by using components such as the five-way valve, the electromagnetic valve and the electronic three-way water valve, so that the efficient intelligent management is performed, the heat dissipation problem of the super quick-charging system is solved, and the refrigerating capacity is improved.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of an ultra-low temperature heat pump air conditioner control system according to an embodiment.
In the figure:
11-a first solenoid valve; 12-a second solenoid valve; 13-a third solenoid valve; 14-a fourth solenoid valve;
21-a first one-way valve; 22-a second one-way valve;
31-a first throttle tube; 32-a second throttle tube;
41-high pressure sensor; 42-a low pressure sensor;
5-five-way valve
51-first valve port; 52-a second valve port; 53-third valve port; 54-fourth valve port; 55-fifth valve port;
61-a battery water inlet; 62-a battery water outlet; 63-a motor water inlet; 64-a radiator water outlet; 65-radiator water inlet; 66-a motor water outlet;
7-an outdoor heat exchanger;
8-an indoor condenser;
9-an evaporator;
10-a gas-liquid separator;
110-an electronic expansion valve;
a 120-cooler;
130-water heater;
140-motor;
150-a waste heat recoverer;
160-a heat sink;
170-a compressor;
180-blower;
191-a first water pump; 192-a second water pump;
200-an electronic three-way water valve; 201-a third port;
300-high voltage PTC;
400-battery.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
Embodiment one:
the present embodiment provides an ultra-low temperature heat pump air conditioner control system, as shown in fig. 1, including: an indoor condenser 8, an outdoor heat exchanger 7, a compressor 170, a pipeline, an evaporator 9, a gas-liquid separator 10, a cooler 120, and an electronic expansion valve (EXV) 110; a high pressure sensor 41 (high pressure P & T sensor) is installed at the discharge port of the compressor 170, and a low pressure sensor 42 (low pressure P & T sensor) is installed at the gas inlet of the gas-liquid separator 10; the compressor 170 is divided into two paths from an exhaust port of the compressor, wherein one path is provided with a first electromagnetic valve 11 with a normally open type and communicated with an indoor condenser 8, and the other path is provided with a second electromagnetic valve 12 with a normally open type and communicated with the outdoor heat exchanger 7; a third electromagnetic valve 13 which is normally closed is arranged between the outdoor heat exchanger 7 and the pipeline connection; a fourth electromagnetic valve 14 with a normally open type is arranged at the inlet of the evaporator 9;
one port of the cooler 120 is connected with the electronic expansion valve 110 and then divided into two paths, one path is connected with the outdoor heat exchanger 7, and the other path is connected with the evaporator 9; the electronic expansion valve 110 is arranged to realize the on-off of indoor refrigeration and battery refrigeration.
A first check valve 21 is arranged between the electronic expansion valve 110 and the outdoor heat exchanger 7;
a second one-way valve 22 is arranged between the connection of the indoor condenser 8 and the outdoor heat exchanger 7;
the circulating medium of the control system is coolant, and particularly, coolant is coolant, and the coolant is ensured not to flow reversely through the two one-way valves.
A first throttle pipe 31 is provided between the outdoor heat exchanger 7 and the second check valve 22; a second throttle tube 32 is arranged between the evaporator 9 and the fourth solenoid valve 14.
Further comprises: parts required in the prior art such as 300-high voltage PTC, 180-blower and the like form the whole large circulation.
In some embodiments, in particular, the system further comprises a water side loop as a loop for heat pump waste heat recovery thermal management, the medium being water; the waterside circuit includes: an integrated kettle, a five-way valve 5, a waste heat recoverer (LCC) 150, a water heater 130, a battery 400, a motor 140, and a radiator 160;
particularly, when the integrated water kettle and heat pump waste heat recovery heat management system is applied to an automobile, the integrated water kettle and heat pump waste heat recovery heat management system is adopted in the whole automobile, and whether cooling liquid passes through the waste heat recoverer (150) LCC or not can be realized through the electronic three-way water valve 200.
The water gap of the integrated kettle comprises: a battery water inlet 61, a battery water outlet 62, a motor water inlet 63, a radiator water outlet 64, a radiator water inlet 65 and a motor water outlet 66;
the five-way valve comprises a first valve port 51, a second valve port 52, a third valve port 53, a fourth valve port 54 and a fifth valve port 55;
the first valve port 51 is correspondingly communicated with the battery water inlet 61, the second valve port 52 is correspondingly communicated with the battery water outlet 62, the third valve port 53 is correspondingly communicated with the motor water inlet 63, the fourth valve port 54 is correspondingly communicated with the radiator water outlet 64, and the fifth valve port 55 is selectively correspondingly communicated with the radiator water inlet 65 or the motor water outlet 66;
the battery water inlet 61 is sequentially connected with the cooler 120, the water heater 130 and the battery water outlet 62;
the motor water inlet 63 is sequentially connected with the motor 140, the waste heat recoverer 150 and the motor water outlet 66;
the radiator water inlet 65 is connected with the radiator 160 and the radiator water outlet 64 in sequence.
The waste heat recoverer 150 is connected in series with the outdoor heat exchanger 7, and the refrigerant side of the waste heat recoverer 150 (LCC) is connected in series with the outdoor heat exchanger 7, so as to realize waste heat recovery of the motor 140.
An electronic three-way water valve 200 is arranged between the motor 140 and the waste heat recoverer 150, and a third port 201 of the electronic three-way water valve 200 is directly connected with the motor water outlet 66.
Embodiment two:
according to the above embodiments, an ultra-low temperature heat pump air conditioner control system for an automobile is further provided, which comprises a refrigerant side loop system and a water side loop system;
as shown in fig. 1, the left side is a refrigerant side loop system, the right side is a water side loop system,
specifically, the refrigerant side circuit system:
the air conditioner control system of the ultra-low temperature heat pump is provided with a high pressure sensor in the exhaust of the compressor and a low pressure sensor in the air inlet of the gas-liquid separator.
The first electromagnetic valve 11 and the second electromagnetic valve 12 are normally open electromagnetic valves, and the refrigeration or heating is selected by the two electromagnetic valves, and a normally closed third electromagnetic valve 13 is arranged between the outdoor heat exchanger 7 and the pipeline connection point. The inlet of the evaporator is provided with a fourth electromagnetic valve 14 which is normally open, and the electronic expansion valve 110 (EXV) of the cooler 120 (Chiller) is combined to realize indoor refrigeration and on-off of the cooling of the battery cooler 120 (Chiller). The refrigerant is ensured not to flow reversely by the two check valves (the first check valve 21 and the second single-phase valve 22).
The LCC waste heat recoverer 150 is connected with the outdoor heat exchanger in series on the refrigerant side, so that waste heat recovery of the motor is realized.
The specific working principle is as follows:
when the air conditioner operates in a refrigerating working condition, the first electromagnetic valve 11 and the third electromagnetic valve 13 are closed, the second electromagnetic valve 12 and the fourth electromagnetic valve 14 are opened, and the waterway of the waste heat recoverer 150 does not participate in circulation; at this time, the indoor condenser 8 serves as an evaporator, and the outdoor heat exchanger 7 serves as a condenser. After separating liquid, the dry superheated gas is sucked and compressed by a compressor to become high-temperature high-pressure gas, and the gas enters an outdoor heat exchanger through the electromagnetic valve to release heat and condense to become supercooled liquid. The supercooled liquid becomes low-temperature low-pressure two-phase fluid after being depressurized through pipeline resistance, and enters an indoor condenser to evaporate and absorb heat (at the moment, the indoor air is cooled), and the next circulation is carried out through an electromagnetic valve and a gas-liquid separator.
When the air conditioner is operated under heating conditions, the first electromagnetic valve 11 and the third electromagnetic valve 13 are opened, the second electromagnetic valve 12 and the fourth electromagnetic valve 14 are closed, at this time, the indoor condenser becomes a condenser, and the outdoor heat exchanger becomes an evaporator. The low temperature and low pressure overheat gas from the outdoor heat exchanger enters the gas-liquid separator, after separating liquid, the dry overheat gas is sucked and compressed by the compressor to become high temperature and high pressure gas, which is loitered out, enters the indoor condenser through the electromagnetic valve to release heat and condense (at this time, the indoor air is heated), becomes supercooled liquid, and the supercooled liquid is depressurized through the resistance of the pipeline to become low temperature and low pressure two-phase fluid.
Specifically, the water side loop system:
in some embodiments, more specifically, the water side loop system has four modes:
firstly, the whole vehicle can adopt an integrated kettle and heat pump waste heat recovery heat management architecture, and the electronic three-way water valve 200 can realize whether cooling liquid passes through LCC;
the mouth of a river of integrated kettle includes: a battery water inlet 61; a battery outlet 62; a motor water inlet 63; a radiator outlet 64; a radiator water inlet 65; a motor water outlet 66;
the five-way valve 5 includes five ports: first, second, third, fourth, and fifth ports 51, 52, 53, 54, and 55;
wherein, the port of the third valve port 53 is connected with a first water pump 191; the port of the first valve port 51 is connected with a second water pump 192;
the first valve port 51 is correspondingly communicated with the battery water inlet 61, the second valve port 52 is correspondingly communicated with the battery water outlet 62, the third valve port 53 is correspondingly communicated with the motor water inlet 63, the fourth valve port 54 is correspondingly communicated with the radiator water outlet 64, and the fifth valve port 55 is selectively correspondingly communicated with the radiator water inlet 65 or the motor water outlet 66;
the specific four modes include:
mode one: the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the fifth valve port is closed. The cooling system of the battery 400 and the cooling system of the motor 140 are independent of each other. LCC waste heat recoverer 150 may or may not be involved in motor 140 cooling.
Mode two: the second valve port is communicated with the third valve port, the first valve port is communicated with the fifth valve port, and the fourth valve port is closed. The coolant circulation loop is a large circulation, the motor 140 and the battery 400 are connected in series, the battery can utilize the waste heat of the motor without passing through the radiator 160. LCC waste heat recoverer 150 may or may not be engaged.
Mode three: the first valve port is communicated with the fourth valve port, the second valve port is communicated with the third valve port, and the fifth valve port is closed. That is, the coolant circulation loop is largely circulated through the radiator 160, and the battery 400 and the motor 140 are cooled by the whole vehicle radiator 160.
Mode four: the third valve port is communicated with the fifth valve port, the first valve port is communicated with the second valve port 2 (the battery water pump does not work), and the fourth valve port is closed. LCC waste heat recoverer 150 recovers motor 140 waste heat.
Embodiment III:
the embodiment provides an ultralow temperature heat pump air conditioner control method, which is applied to the ultralow temperature heat pump air conditioner control system according to any one of the first embodiment, and is specifically as follows:
the control logic for 4 working conditions of typical indoor refrigeration, super fast charge, normal temperature heating and low temperature heating of the heat pump system is described in detail, and is specifically shown in the following table.
| Sequence number | Refrigerant circulation mode | LCC | chiller | Evaporator | Indoor condenser | Outdoor heat exchanger |
| 1 | Indoor refrigeration | / | / | Heat absorption | / | Heat dissipation |
| 2 | Super quick-charging | Heat dissipation | Heat absorption | / | / | Heat dissipation |
| 3 | Heating at normal temperature | / | / | / | Heat dissipation | Heat absorption |
| 4 | Low temperature heating | Heat absorption | / | / | Heat dissipation | / |
Indoor cooling mode:
closing the first electromagnetic valve 11 and the third electromagnetic valve 13, and opening the second electromagnetic valve 12 and the fourth electromagnetic valve 14, wherein the waterway of the waste heat recoverer 150 does not participate in circulation;
super fast charge mode:
closing the first electromagnetic valve 11, the third electromagnetic valve 13 and the fourth electromagnetic valve 14, opening the second electromagnetic valve 12, and opening the electronic expansion valve 110; meanwhile, the five-way valve enters the first working mode, specifically, the first valve port 51 is communicated with the second valve port 52, the third valve port 53 is communicated with the fourth valve port 54, and the fifth valve port 55 is closed;
specifically, in the 4C fast charge mode, the cooling capacity required by the battery is about 10kw, and the heat dissipation capacity required by the system is about 15kw or more, for example, the heat dissipation capacity is obviously insufficient only by using the outdoor heat exchanger. Super-fast-charge condition requiring compressor inhibition
The LCC is connected in series with a heat dissipation system of the motor, and the outdoor heat exchanger and the radiator dissipate heat into air at the same time when the fan works.
Heating at normal temperature:
opening the first electromagnetic valve 11 and the third electromagnetic valve 13, and closing the second electromagnetic valve 12 and the fourth electromagnetic valve 14, wherein the waterway of the waste heat recoverer 150 does not participate in circulation;
specifically, the ambient temperature is more than or equal to-5 ℃, the evaporation capacity of the outdoor heat exchanger 7 is sufficient, heat can be directly absorbed from air, and the LCC is not required to absorb motor waste heat. Under the working condition, the first electromagnetic valve 11 and the third electromagnetic valve 13 are opened, the second electromagnetic valve 12 and the fourth electromagnetic valve 14 are closed, the cooling fan is opened, and the LCC does not participate in water circulation.
Low temperature heating mode:
the temperature of the environment is less than or equal to 20 ℃ below zero and less than or equal to 5 ℃ below zero, and LCC participates in water circulation and enters waste heat recovery.
First, retrieve motor waste heat mode:
opening the first electromagnetic valve 11 and the third electromagnetic valve 13, closing the second electromagnetic valve 12 and the fourth electromagnetic valve 14, and simultaneously, enabling the five-way valve to enter a fourth working mode, specifically enabling the third valve port 53 to be communicated with the fifth valve port 55, enabling the fifth valve port 55 to be communicated with the motor water outlet 66, enabling the first valve port 51 to be communicated with the second valve port 52, and closing the fourth valve port 54; the temperature of the LCC water inlet is more than or equal to-15 ℃ and the temperature of the battery is less than or equal to 10 ℃, and at the moment, the waste heat of the LCC to the motor is utilized for recycling.
Second, simultaneous recovery motor and battery waste heat mode:
opening the first electromagnetic valve 11 and the third electromagnetic valve 13, closing the second electromagnetic valve 12 and the fourth electromagnetic valve 14, and simultaneously, enabling the five-way valve to enter a second working mode, specifically enabling the second valve port 52 to be communicated with the third valve port 53, enabling the first valve port 51 to be communicated with the fifth valve port 55, enabling the fifth valve port 55 to be communicated with the radiator water inlet 65, and closing the fourth valve port 54; the waste heat recoverer 150 is connected in series with the water circuit of the motor. The temperature of the LCC water inlet is more than or equal to-15 ℃ and the temperature of the battery is more than 10 ℃, and at the moment, the waste heat of the LCC to the motor and the battery is utilized for recycling.
Embodiment four:
the embodiment provides an electric vehicle comprising the ultra-low temperature heat pump air conditioner control system of any one of embodiment 1.
In summary, the ultra-low temperature heat pump air conditioner control system and method and the electric automobile provided by the invention have the advantages that the service environment temperature of the heat pump can be lowest detected to minus 20 ℃, so that the heat pump air conditioner with a wide temperature range is achieved; meanwhile, the energy-saving effect is improved by 20% compared with that of a common heat pump through the waste heat recovery of a battery and a motor, and the heat dissipation of 4C super fast charging can be supported.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. An ultra-low temperature heat pump air conditioner control system, comprising: an indoor condenser, an outdoor heat exchanger, a compressor, a pipeline, an evaporator, a gas-liquid separator, a cooler and an electronic expansion valve; a high-pressure sensor is arranged at the exhaust port of the compressor, and a low-pressure sensor is arranged at the air inlet of the gas-liquid separator; the compressor is divided into two paths from the exhaust port, wherein one path is provided with a first normally open electromagnetic valve and communicated with the indoor condenser, and the other path is provided with a second normally open electromagnetic valve and communicated with the outdoor heat exchanger; a normally closed third electromagnetic valve is arranged between the outdoor heat exchanger and the pipeline connection; a fourth electromagnetic valve which is normally open is arranged at the inlet of the evaporator;
one port of the cooler is connected with the electronic expansion valve, and then the other port of the cooler is divided into two paths at the other end of the electronic expansion valve, wherein one path of the cooler is connected with the outdoor heat exchanger, and the other path of the cooler is connected with the evaporator; the on-off of indoor refrigeration and battery refrigeration is realized through the arrangement of the electronic expansion valve;
a first one-way valve is arranged between the electronic expansion valve and the outdoor heat exchanger;
a second one-way valve is arranged between the connection of the indoor condenser and the outdoor heat exchanger;
the system also comprises a water side loop which is used as a loop for heat pump waste heat recovery heat management, and the medium is water; the waterside circuit includes: the integrated kettle, the five-way valve, the waste heat recoverer, the water heater, the battery, the motor and the radiator;
the water gap of the integrated kettle comprises: a battery water inlet, a battery water outlet, a motor water inlet, a radiator water outlet, a radiator water inlet and a motor water outlet;
the five-way valve comprises a first valve port, a second valve port, a third valve port, a fourth valve port and a fifth valve port;
the first valve port is correspondingly communicated with the battery water inlet, the second valve port is correspondingly communicated with the battery water outlet, the third valve port is correspondingly communicated with the motor water inlet, the fourth valve port is correspondingly communicated with the radiator water outlet, and the fifth valve port is selectively correspondingly communicated with the radiator water inlet or the motor water outlet;
the battery water inlet is sequentially connected with the cooler, the water heater and the battery water outlet;
the water inlet of the motor is sequentially connected with the motor, the waste heat recoverer and the water outlet of the motor; the radiator water inlet is connected with the radiator and the radiator water outlet in sequence.
2. The ultra low temperature heat pump air conditioner control system according to claim 1, wherein a first throttle pipe is provided between the outdoor heat exchanger and the second check valve; a second throttle tube is disposed between the evaporator and the fourth solenoid valve.
3. The ultra-low temperature heat pump air conditioner control system according to any one of claims 1-2, wherein a circulating medium of the control system is a cooling liquid.
4. The ultra-low temperature heat pump air conditioner control system according to claim 3, wherein the heat recovery unit is connected in series with the outdoor heat exchanger.
5. The ultra-low temperature heat pump air conditioner control system according to claim 4, wherein an electronic three-way water valve is arranged between the motor and the waste heat recoverer, and a third port of the electronic three-way water valve is directly connected with a water outlet of the motor.
6. An ultralow temperature heat pump air conditioner control method is characterized by applying the ultralow temperature heat pump air conditioner control system according to claim 5, and the method comprises the following steps:
indoor cooling mode: closing the first electromagnetic valve and the third electromagnetic valve, and opening the second electromagnetic valve and the fourth electromagnetic valve, wherein the waterway of the waste heat recoverer does not participate in circulation;
super fast charge mode: closing the first electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve, opening the second electromagnetic valve and opening the electronic expansion valve; simultaneously, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the fifth valve port is closed;
heating at normal temperature: opening the first electromagnetic valve and the third electromagnetic valve, and closing the second electromagnetic valve and the fourth electromagnetic valve;
mode of low-temperature heating and motor waste heat recovery simultaneously: opening the first electromagnetic valve and the third electromagnetic valve, closing the second electromagnetic valve and the fourth electromagnetic valve, simultaneously enabling the third valve port to be communicated with a fifth valve port, enabling the fifth valve port to be communicated with a water outlet of the motor, enabling the first valve port to be communicated with the second valve port, and closing the fourth valve port;
mode of low-temperature heating and simultaneous recovery of motor and battery waste heat: opening the first electromagnetic valve and the third electromagnetic valve, closing the second electromagnetic valve and the fourth electromagnetic valve, simultaneously, enabling the second valve port to be communicated with a third valve port, enabling the first valve port to be communicated with a fifth valve port, enabling the fifth valve port to be communicated with a water inlet of the radiator, and closing the fourth valve port; the waste heat recoverer is connected with the water loop of the motor in series.
7. An electric vehicle, characterized by comprising the ultra-low temperature heat pump air conditioner control system according to any one of claims 1 to 5.
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| CN110525169A (en) * | 2019-09-05 | 2019-12-03 | 上海理工大学 | Pure electric automobile integrated crew module's heat pump air conditioner and three electric heating management systems |
| CN110588280A (en) * | 2019-08-26 | 2019-12-20 | 上海理工大学 | New energy automobile thermal management system integrating three thermal management functions and waste heat recovery function |
| CN111497556A (en) * | 2020-04-27 | 2020-08-07 | 吉林大学 | Carbon dioxide heat pump air conditioner whole vehicle heat management system with motor waste heat recovery function |
| CN112339527A (en) * | 2020-12-01 | 2021-02-09 | 南京协众汽车空调集团有限公司 | New energy automobile thermal management system and working method thereof |
| CN214324840U (en) * | 2021-01-15 | 2021-10-01 | 西安嘉和华亨热系统有限公司 | Low-temperature heat pump air conditioner device of new energy automobile |
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|---|---|---|---|---|
| CN110588280A (en) * | 2019-08-26 | 2019-12-20 | 上海理工大学 | New energy automobile thermal management system integrating three thermal management functions and waste heat recovery function |
| CN110525169A (en) * | 2019-09-05 | 2019-12-03 | 上海理工大学 | Pure electric automobile integrated crew module's heat pump air conditioner and three electric heating management systems |
| CN111497556A (en) * | 2020-04-27 | 2020-08-07 | 吉林大学 | Carbon dioxide heat pump air conditioner whole vehicle heat management system with motor waste heat recovery function |
| CN112339527A (en) * | 2020-12-01 | 2021-02-09 | 南京协众汽车空调集团有限公司 | New energy automobile thermal management system and working method thereof |
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