CN114274725A - Heat distribution control system of air conditioner battery combined heating system - Google Patents

Heat distribution control system of air conditioner battery combined heating system Download PDF

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Publication number
CN114274725A
CN114274725A CN202110259855.6A CN202110259855A CN114274725A CN 114274725 A CN114274725 A CN 114274725A CN 202110259855 A CN202110259855 A CN 202110259855A CN 114274725 A CN114274725 A CN 114274725A
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China
Prior art keywords
heat
battery
heat exchanger
threshold
heat release
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CN202110259855.6A
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Chinese (zh)
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李楠
陈晶晶
徐兆良
阪本宏太
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Denso Corp
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Denso Corp
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Priority to CN202110259855.6A priority Critical patent/CN114274725A/en
Priority to JP2023505167A priority patent/JP7491460B2/en
Priority to PCT/JP2022/001521 priority patent/WO2022190641A1/en
Publication of CN114274725A publication Critical patent/CN114274725A/en
Pending legal-status Critical Current

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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
    • 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
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
    • 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
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A heat distribution control system for an air conditioning battery cogeneration system, comprising: the system comprises an in-vehicle heating loop with a first pump and a heat radiator, a battery heating loop with a second pump and a battery heat exchanger, and two branches for respectively connecting the in-vehicle heating loop and the battery heating loop; a heat source is arranged on the heating loop in the vehicle; a three-way flow regulating valve is arranged on at least one connecting point of the two branches connected with the in-vehicle heating loop and the battery heating loop; a first temperature sensor is arranged on the inlet side of the radiator, and a second temperature sensor is arranged on the inlet side of the battery heat exchanger; the controller is used for adjusting the output of the heat source and the opening of the three-way flow regulating valve based on the detection values of the first temperature sensor and/or the second temperature sensor. The invention can give consideration to different heating requirements of the air conditioner side and the battery side when simultaneously heating the vehicle interior and the battery.

Description

Heat distribution control system of air conditioner battery combined heating system
Technical Field
The invention relates to the technical field of vehicle thermal management, in particular to a heat distribution control system of an air conditioner battery combined heating system.
Background
At present, batteries used on new energy vehicles need to operate within a reasonable temperature interval. When the battery temperature is too low, the effective output electric energy and voltage are affected, and therefore the battery performance is reduced, and the vehicle cruising ability is reduced. Therefore, when the temperature of the battery is low, the battery needs to be heated to maintain the battery at a proper working temperature. On the other hand, in a cold environment, there is a demand for air conditioning and warming the vehicle interior. Generally, hot water heated by a heat source flows into the heat radiator through the water inlet pipe, and the heat of the hot water is converted into hot air by blowing of the blower to heat the water. Therefore, the battery and the radiator which need to be heated are often arranged in the same loop to be heated simultaneously.
Fig. 4 is a schematic circuit diagram of a conventional air-conditioning battery combined heating system. As a conventional technique, as shown in fig. 4, a heat source 2 and a radiator 3 are provided in an in-vehicle heating circuit 200, a battery heat exchanger 4 is provided in a battery heating circuit 400, and the in-vehicle heating circuit 200 and the battery heating circuit 400 are integrated in parallel by using a three-way flow rate adjustment valve 5. Although the vehicle interior and the battery can be heated at the same time, the water temperatures of the vehicle interior heating circuit 200 and the battery heating circuit 400 are the same, and the requirement that the water temperature required for heating the battery is different from the water temperature required for the radiator for air-conditioning the vehicle interior cannot be satisfied, and thus problems such as the water temperature in the battery heating circuit 400 being too high or the water temperature in the vehicle interior heating circuit 200 not being able to reach an appropriate temperature tend to occur.
In addition, other prior arts disclose that by providing an appropriate air conditioning battery combined heating system, under the regulation of a controller, cooling liquids with different temperatures are respectively supplied to the radiator 3 and the battery heat exchanger 4 to meet respective heating requirements. However, when the air temperature is low in winter, the heat source may not be able to both heat the air in the vehicle interior and heat the battery, and at this time, the normal heat distribution control may not be adopted, which may result in that the air conditioning requirement in the vehicle interior and the heating requirement of the battery may not be met.
Disclosure of Invention
The problems to be solved by the invention are as follows:
in view of the above problems, an object of the present invention is to provide a heat distribution control system for an air conditioning battery combined heating system, which can dynamically adjust the supply and demand relationship of heat in the heating system, and distribute the heat release of a heat source according to different requirements of an air conditioning side and a battery side.
The technical means for solving the problems are as follows:
to solve the above problems, a heat distribution control system of an air conditioning battery combined heating system according to one aspect of the present invention includes: an in-vehicle heating circuit having a first pump and a heat radiator, a battery heating circuit having a second pump and a battery heat exchanger, and two branches connecting the in-vehicle heating circuit and the battery heating circuit, respectively; a heat source is arranged on the heating loop in the vehicle; a three-way flow regulating valve is arranged on at least one connecting point of the two branches, which is connected with the in-vehicle heating loop and the battery heating loop; a first temperature sensor is disposed on an inlet side of the radiator, and a second temperature sensor is disposed on an inlet side of the battery heat exchanger; the controller is used for adjusting the output of the heat source and the opening degree of the three-way flow regulating valve based on the detection value of the first temperature sensor and/or the second temperature sensor.
According to the invention, the vehicle interior and the battery can be heated simultaneously, the cooling liquid with different temperatures can be respectively supplied to the radiator and the battery heat exchanger, and the heat source radiation can be distributed according to different requirements of the air-conditioning side and the battery side according to the heat supply and demand relation in the air-conditioning battery combined heating system.
The invention has the following effects:
the invention can simultaneously heat the vehicle interior and the battery, and can give consideration to different heating requirements of the air conditioner side and the battery side.
Drawings
FIG. 1 is a schematic circuit diagram of an air conditioning battery integrated heating system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a heat distribution control method of the air conditioning battery combined heating system shown in FIG. 1;
FIG. 3 is a schematic diagram of the controller adjusting the battery inlet temperature threshold based on the heat source exotherm;
FIG. 4 is a schematic circuit diagram of a prior art air conditioning battery integrated heating system;
description of the symbols:
1. a first pump; 2. a heat source; 3. a heat emitter; 4. a battery heat exchanger; 5. a three-way flow regulating valve; 6. a second pump; 7. a first temperature sensor; 8. a second temperature sensor; 200. an in-vehicle heating circuit; 301. a first branch; 302. a second branch circuit; 400. a battery heating circuit.
Detailed Description
The present invention is further described below in conjunction with the following embodiments and the accompanying drawings, it being understood that the drawings and the following embodiments are illustrative of the invention only and are not limiting thereof. In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the present invention, "upper", "lower", "left" and "right" refer to "upper", "lower", "left" and "right" when facing the paper.
Disclosed herein is a heat distribution control system for an air conditioning battery combined heating system, which can dynamically adjust the heat supply and demand relationship in the heating system and distribute the heat released from a heat source according to the different requirements of the air conditioning side and the battery side.
[ air-conditioning battery combined heating System ]
Fig. 1 is a schematic circuit diagram of an air conditioner battery combined heating system according to an embodiment of the invention. As shown in fig. 1, the air-conditioning battery combined heating system includes an in-vehicle heating circuit 200, a battery heating circuit 400, and a first branch 301 and a second branch 302 connecting the two.
The in-vehicle heating circuit 200 is mainly used to heat a vehicle interior by flowing heated coolant through a radiator, and includes a first pump 1 for pumping the coolant, a heat source 2 for heating the coolant, and a radiator 3 for radiating heat into the vehicle interior, which are connected in this order. The heat source 2 may be, for example, an HVH high-voltage electric heater or the like that directly heats the coolant, and only one or a plurality of heat sources may be provided in the in-vehicle heating circuit 200 according to actual needs. The radiator 3 may be a heating core such as a warm air core, for example, which receives the coolant heated by the heat source 2 through a water inlet, heats air by blowing air from a blower, and supplies heat to the vehicle interior through a blast duct, and discharges the coolant at a low temperature through a water outlet. In the vehicle interior heating circuit 200 of the air conditioning battery combination heating system, the first pump 1, the heat source 2 and the radiator 3 are connected in series to the vehicle interior heating circuit 200 so that the outlet side thereof is disposed upward in the drawing. When the first pump 1 is operated, the coolant circulates counterclockwise in the vehicle interior heating circuit 200 in such a manner that the coolant is pumped to the heat source 2 by the first pump 1, is heated and warmed, then flows into the radiator 3, radiates heat, is discharged from the radiator 3, and then flows into the first pump 1 again. As shown in fig. 1, the in-vehicle heating circuit 200 is also provided with a first temperature sensor 7 on the inlet side of the radiator 3 (i.e., on the outlet side of the heat source 2), and the first temperature sensor 7 detects the temperature of the coolant flowing into the radiator 3.
The battery heating circuit 400 is mainly used to heat the battery heat exchanger 4 with the heated coolant, thereby warming the battery by heat exchange between the battery heat exchanger 4 and the battery, and includes the battery heat exchanger 4 and a second pump 6 for pumping the coolant. The battery heat exchanger 4 may be an internal or external heat exchanger used by a conventional battery, such as a power battery panel of a new energy vehicle. In the battery heating circuit 400 of the air conditioning battery combination heating system, the second pump 6 is disposed such that the outlet side is disposed downward in the drawing, and the battery heat exchanger 4 is disposed closer to the outlet side of the second pump 6 than to the inlet side of the second pump 6. When the second pump 6 is operated, the coolant circulates counterclockwise in the battery heating circuit 400. Specifically, the coolant is pumped by the second pump 6 to the coolant inlet of the battery heat exchanger 4, flows into the battery heat exchanger 4, heats the battery, and is discharged from the coolant outlet of the battery heat exchanger 4, and then a part of the coolant is returned to the second pump 6, and the other part is returned to the in-vehicle heating circuit 200 via a second branch 302 described later. As shown in fig. 1, the battery heating circuit 400 is also provided with a second temperature sensor 8 on the inlet side of the battery heat exchanger 4 (i.e., on the outlet side of the second pump 6), and the second temperature sensor 8 detects the temperature of the coolant flowing into the battery heat exchanger 4.
A first branch 301 and a second branch 302 through which the coolant flows are provided between the in-vehicle heating circuit 200 and the battery heating circuit 400, whereby the coolant flows between the in-vehicle heating circuit 200 and the battery heating circuit 400. Specifically, the first branch 301 is a flow path through which the coolant flows from the vehicle interior heating circuit 200 to the battery heating circuit 400, and the second branch 302 is a flow path through which the coolant returns from the battery heating circuit 400 to the vehicle interior heating circuit 200. In the air-conditioning battery combined heating system, the flow rate of the coolant flowing from the in-vehicle heating circuit 200 into the battery heating circuit 400 should be equal to the flow rate of the coolant returned from the battery heating circuit 400 to the in-vehicle heating circuit 200, and therefore the flow rates of the coolant in the first branch 301 and the second branch 302 are equal.
In the air-conditioning battery combined heating system, a three-way flow regulating valve 5 is further arranged on a connecting node of the first branch 301 and the in-vehicle heating loop 200. The three-way flow control valve 5 has an inlet connected to the outlet side of the heat source 2 and two outlets, one of which is connected to the inlet side of the heat emitter 3 and the other of which is connected to the inlet side of the battery heat exchanger 4 via a first branch 301. As described above, by adjusting the opening degree of the radiator-side outlet (hereinafter, simply referred to as "radiator-side opening degree") and the opening degree of the battery heat exchanger-side outlet (that is, the first branch passage 301 side) (hereinafter, simply referred to as "battery heat exchanger-side opening degree") of the three-way flow rate control valve 5, the coolant from the heat source 2 can be distributed to the in-vehicle heating circuit 200 and the battery heating circuit 400. The three-way flow rate adjustment valve 5 is not limited to the above-described position, and may be provided at least one connection point at which the first branch 301 and the second branch 302 are connected to the vehicle interior heating circuit 200 and the battery heating circuit 400, respectively.
As shown in fig. 1, when the first pump 1 and the second pump 6 are stably operated, the cooling fluid in the air-conditioning battery combined heating system flows as follows. On the other hand, the high-temperature coolant heated by the heat source 2 and having a temperature Td and a flow rate Qd is branched at the three-way flow control valve 5, a part of the coolant having a temperature Td flows into the radiator 3 from the radiator-side outlet of the three-way flow control valve 5 and radiates heat therefrom to heat the vehicle interior, and the other part of the coolant having a temperature Td and a flow rate Qa flows from the battery heat exchanger-side outlet of the three-way flow control valve 5 to the first branch 301. On the other hand, the second pump 6 circulates a part of the coolant in the battery heating circuit 400, specifically, a part of the coolant having a flow rate (Qc-Qa) of the coolant having a temperature Tc' discharged from the outlet of the battery heat exchanger 4, in the circuit. Thus, the high-temperature coolant having a flow rate Qa at Td and the low-temperature coolant having a flow rate (Qc-Qa) at Tc from the first branch 301 are merged at the inlet side of the second pump 6 and then flow into the battery heat exchanger 4 at the flow rate Qc at temperature Tc, and the coolant in the battery heat exchanger 4 releases heat when passing through the battery, and the battery absorbs the heat released from the coolant to heat up the battery. The coolant having the flow rate Qc but having the temperature decreased to Tc' is then branched off at the outlet side of the battery heat exchanger 4, wherein the portion of the coolant having the flow rate (Qc-Qa) circulates back to the inlet side of the second pump 6 as described above, and the remaining portion of the coolant having the flow rate Qa returns to the in-vehicle heating circuit 200 via the second branch 302. Thus, the air-conditioning battery combination heating system can distribute the coolant having different temperatures to the radiator 3 and the battery heat exchanger 4.
The temperature Td is the temperature of the coolant output from the heat source 2, in other words, the temperature of the coolant on the inlet side of the radiator 3, and is detected by the first temperature sensor 7. The temperature Tc is the temperature of the coolant on the inlet side of the cell heat exchanger 4 and can be detected by the second temperature sensor 8. The flow rate of the coolant in each circuit can be calculated from the opening degree of each opening of the three-way flow control valve 5 and the power of the water pump, which will be described in detail later.
[ Heat quantity distribution control ]
When the air-conditioning battery combined heating system is used for heating the vehicle compartment and warming the battery, the radiator 3 and the battery heat exchanger 4 are ideally operated at respective target operating temperatures. However, during actual operation, there may be a case where the actual operating temperatures of the heat radiator 3 and the battery heat exchanger 4 deviate from the target operating temperature. Therefore, the air conditioning battery combination heating system includes a controller, not shown, in addition to the above-described flow paths and the components provided in the flow paths. The controller is used for performing heat distribution control including power control of the heat source 2, opening degree control of the three-way flow rate control valve 5, setting of each temperature threshold value described later, and the like, on the air conditioning battery combined heating system, and may be, for example, a microcomputer having a memory such as a ROM, a RAM, and the like and a CPU, and the CPU executes a program stored in the ROM.
Here, a radiator inlet temperature threshold T1 is set in advance for the radiator 3, the radiator inlet temperature threshold T1 is usually the coolant temperature of the radiator inlet that can operate the radiator 3 at the target operating temperature, and the controller can determine whether or not the radiator 3 is at the target operating temperature by comparing the radiator inlet temperature threshold T1 with the coolant temperature Td on the inlet side of the radiator 3 detected by the first temperature sensor 7. A battery inlet temperature threshold T0 is set in advance for the battery heat exchanger 4, the radiator inlet temperature threshold T0 is generally the temperature of the coolant at the radiator inlet that enables the radiator 3 to operate at the target operating temperature, and the battery inlet temperature threshold T0 is compared with the coolant temperature Tc on the inlet side of the battery heat exchanger 4 detected by the second temperature sensor 8 to determine whether or not the battery heat exchanger 4 is at the target operating temperature.
(Heat quantity distribution method based on change of control object)
In the present invention, when simultaneously heating the vehicle interior and the battery, the controller can appropriately distribute the heat release amount of the heat source 2 to the air-conditioning side and the battery side by adjusting the output of the heat source 2 and the opening of the three-way flow rate adjusting valve 5 based on the output of the heat source 2 as a control target, the coolant temperature, or the difference between the actual heat release amount calculated from the coolant temperature and the target value thereof.
The heat source 2 is not always operated at the maximum output power due to the outside ambient air temperature, etc. Therefore, when the detected value Td of the first temperature sensor 7 is lower than the radiator inlet temperature threshold value T1, the controller compares the current operation power of the heat source 2 with the maximum output power thereof. If the operating power of the heat source 2 is lower than the maximum output power thereof, the controller controls to increase the output power of the heat source 2 so that the detection value Td of the first temperature sensor 7 is raised to the radiator inlet temperature threshold T1, in other words, the output power of the heat source 2 is increased to satisfy the air-conditioning heating in the vehicle interior. On the other hand, if the heat source 2 is already operating at its maximum output power, the controller adjusts the heat distribution in the air-conditioning battery combined heating system by using another control method, which will be described later.
In addition to the heat source regulation, the controller also regulates the heat distribution in the air-conditioning battery combined heating system by regulating the opening degree of the three-way flow regulating valve 5. The controller may adjust the opening degree of the three-way flow rate adjustment valve 5 by the detection value Td of the first temperature sensor 7 and/or the detection value Tc of the second temperature sensor 8, or may adjust the opening degree of the three-way flow rate adjustment valve 5 by the heat release amount calculated from these detection values, thereby changing the distribution ratio of the high-temperature coolant of the heat source 2 to the heat radiator 3 and the battery heat exchanger 4.
Specifically, the controller compares the detection value Tc of the second temperature sensor 8 with a preset battery inlet temperature threshold value T0, and adjusts the opening degree of the three-way flow rate adjustment valve 5 based on the detection value Tc of the second temperature sensor 8. When the detected value Tc of the second temperature sensor 8 is lower than the battery inlet temperature threshold value T0, the controller adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 in the opening direction so that the discharge flow rate of the in-vehicle heating circuit 200 to the battery heating circuit 400 increases, that is, so that the coolant flow rate in the first branch 301 increases, whereby the flow rate of the high-temperature coolant increases in the battery heating circuit 400, the coolant temperature Tc on the inlet side of the battery heat exchanger 4 increases, and the heating performance for the battery can be improved. Conversely, when the detected value Tc of the second temperature sensor 8 is higher than the battery inlet temperature threshold value T0, the controller adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 in the closing direction so that the discharge flow rate of the in-vehicle heating circuit 200 to the battery heating circuit 400 decreases, that is, so that the coolant flow rate in the first branch 301 decreases, whereby the flow rate of the high-temperature coolant in the battery heating circuit 400 decreases, the coolant temperature Tc on the inlet side of the battery heat exchanger 4 decreases, and more of the high-temperature coolant flows to the radiator 3, and the heating effect in the vehicle interior can be improved.
The controller may calculate the heat release amount of the battery heat exchanger 4 from the battery (i.e., the amount of heat flowing into the battery) based on the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8, and may adjust the opening degree of the three-way flow rate adjustment valve 5 by comparing the calculated heat release amount Pc of the battery heat exchanger with a preset threshold value of the heat release amount of the battery heat exchanger. Specifically, the controller calculates the coolant flow rate Qa in the first branch 301, the coolant flow rate Qc through the battery heat exchanger 4, and the coolant flow rate Qd through the heat source 2 (both volume flow rates) by the three-way flow rate adjustment valve 5 opening degree and the water pump power. Since two coolant liquids different in temperature are mixed on the inlet side of the second pump 6, and the sum of the amounts of heat carried by the two coolant liquids in the two flow paths before the merging should be equal to the amount of heat carried by the coolant liquid in the flow path after the merging, there is Td × Qa + Tc ' × (Qc-Qa) ═ Tc × Qc, and by this equation, the coolant temperature Tc ' on the outlet side of the battery heat exchanger 4 can be obtained, and the battery heat exchanger heat release amount Pc can be calculated from the equation Pc = Cp × ρ × Qc × (Tc-Tc '), where Cp is the coolant specific heat capacity and ρ is the coolant density. The heat release amount Pd of the heat radiator 3 (i.e., the heat radiator inflow heat amount) can also be calculated, and the calculation process will not be described in detail.
Similarly to the preset battery inlet temperature threshold T0 for the battery heat exchanger 4, the preset battery heat exchanger heat radiation amount threshold P0 for the battery heat exchanger 4 may be also used. After calculating the battery heat exchanger heat release amount Pc as described above, the controller compares the battery heat exchanger heat release amount Pc with a preset battery heat exchanger heat release amount threshold P0. When the battery heat exchanger heat release amount Pc is lower than the battery heat exchanger heat release amount threshold P0, the controller adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 in the opening direction so as to increase the flow rate of the coolant in the first branch 301, thereby increasing the flow rate of the high-temperature coolant for the battery heating circuit 400, enabling the battery heat exchanger heat release amount Pc to be increased, and enabling the heating performance for the battery to be improved. On the contrary, when the battery heat exchanger heat release amount Pc is higher than the battery heat exchanger heat release amount threshold P0, the controller adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 in the closing direction so as to decrease the flow rate of the coolant in the first branch 301, thereby decreasing the flow rate of the high-temperature coolant in the battery heating circuit 400, enabling the battery heat exchanger heat release amount Pc to be decreased, enabling more high-temperature coolant to flow to the radiator 3, and enabling the heating effect in the vehicle compartment to be improved.
In addition to adjusting the opening degree of the three-way flow rate adjustment valve 5 based on the detected value Tc of the second temperature sensor 8 or the calculated battery heat exchanger heat release amount Pc, the controller may also adjust the opening degree of the three-way flow rate adjustment valve 5 based on the detected value Td of the first temperature sensor 7 or the calculated heat radiator heat release amount Pd.
Specifically, the controller compares the detection value Td of the first temperature sensor 7 with a preset radiator inlet temperature threshold T1, and adjusts the opening degree of the three-way flow rate adjustment valve 5 based on the detection value Td of the first temperature sensor 7. When the detection value Td of the first temperature sensor 7 is lower than the radiator inlet temperature threshold value T1, the controller adjusts the radiator-side opening degree of the three-way flow rate adjustment valve 5 in the opening direction, whereby the coolant flowing into the radiator 3 increases, and the vehicle interior heating performance can be improved. Conversely, when the detection value Td of the first temperature sensor 7 is higher than the radiator inlet temperature threshold value T1, the controller adjusts the radiator-side opening degree of the three-way flow rate adjustment valve 5 in the closing direction, whereby the coolant flowing into the radiator 3 decreases, and more coolant flows into the battery heat exchanger 4, whereby the heating performance for the battery can be improved.
The controller may also set a radiator heat threshold P1 in advance for the radiator 3. The controller calculates the radiator heat release amount Pd as described above, and then compares the radiator heat release amount Pd with a radiator heat threshold P1 set in advance. When the radiator heat release amount Pd is lower than the radiator heat threshold value P1, the controller adjusts the radiator-side opening degree of the three-way flow rate adjustment valve 5 in the opening direction, thereby increasing the radiator heat release amount Pd and improving the vehicle interior heating performance. Conversely, when the radiator heat release amount Pd is higher than the radiator heat threshold value P1, the controller adjusts the radiator-side opening degree of the three-way flow rate adjustment valve 5 in the closing direction, thereby reducing the radiator heat release amount Pd, and allowing more high-temperature coolant to flow to the radiator 3, thereby improving the heating performance of the battery.
Further, the controller may also perform the heat distribution control, that is, the adjustment of the opening degree of the three-way flow rate adjustment valve 5 based on the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8, based on both the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8. Specifically, the controller calculates a first adjustment amount a by which the opening degree of the cell heat exchanger side of the three-way flow rate adjustment valve 5 should theoretically be adjusted in the opening direction or the closing direction based on the difference between the detection value Td of the first temperature sensor 7 and a preset radiator inlet temperature threshold value T1, calculates a second adjustment amount B by which the opening degree of the cell heat exchanger side of the three-way flow rate adjustment valve 5 should theoretically be adjusted in the opening direction or the closing direction based on the difference between the detection value Tc of the second temperature sensor 8 and a preset cell inlet temperature threshold value T0, and then actually adjusts the opening degree of the three-way flow rate adjustment valve 5 based on the smaller one of the first adjustment amount a and the second adjustment amount B.
Fig. 2 is a flowchart of a method of controlling heat distribution in the air-conditioning battery combined heating system shown in fig. 1. As shown in fig. 2, on the one hand, the controller receives the detection value Td of the first temperature sensor 7 and compares it with a preset radiator inlet temperature threshold T1. When Td is greater than T1, which indicates that the temperature of the radiator 3 is high, the controller calculates a first opening increase amount, which is an amount by which the battery heat exchanger-side opening of the three-way flow rate adjustment valve 5 should theoretically be adjusted in the opening direction, based on the difference between the Td and the Td; when Td is less than T1, which indicates that the temperature of the radiator 3 is low, the controller calculates the amount by which the battery heat exchanger-side opening degree of the three-way flow rate adjustment valve 5 should theoretically be adjusted in the closing direction, that is, the first opening degree reduction amount, based on the difference between the two. On the other hand, the controller receives the detection value Tc of the second temperature sensor 8. And compares it to a preset battery inlet temperature threshold T0. When Tc is less than T0, it indicates that the temperature of the cell heat exchanger 4 is low, and the controller calculates a second opening increase amount, which is an amount by which the opening of the three-way flow rate adjustment valve 5 on the cell heat exchanger side should be theoretically adjusted in the opening direction, based on the difference between Tc and Tc; when Tc is greater than T0, indicating that the temperature of the cell heat exchanger 4 is high, the controller calculates the theoretically required adjustment amount of the cell heat exchanger-side opening degree of the three-way flow rate adjustment valve 5 toward the closing direction, that is, the second opening degree decrease amount, based on the difference between the two.
Since the controller determines whether the cell heat exchanger-side opening degree of the three-way flow rate adjustment valve 5 is adjusted in the opening direction or in the closing direction based on the magnitude relationship between the detection value Td of the first temperature sensor 7 and the preset radiator inlet temperature threshold value T1, and further calculates the theoretical value of the amount to be adjusted, in the calculation process, if Td is greater than T1, the calculated amount to be adjusted is a positive value (i.e., a first opening degree increase amount), if Td is smaller than T1, the calculated amount to be adjusted is a negative value (i.e., a first opening degree decrease amount), and when Td is equal to T1 or Tc is equal to T0, the controller also calculates the amount to be adjusted of the three-way flow rate adjustment valve 5, which is equal to 0 at this time. Similarly, when it is determined whether the cell-heat-exchanger-side opening degree of the three-way flow rate adjustment valve 5 is adjusted in the opening direction or in the closing direction based on the magnitude relationship between the detected value Tc of the second temperature sensor 8 and the preset cell inlet temperature threshold value T0, and the theoretical value of the amount to be adjusted is further calculated, if Tc is greater than T0, the cell-heat-exchanger-side opening degree of the three-way flow rate adjustment valve 5 is adjusted in the closing direction, the calculated amount to be adjusted is a negative value (i.e., a second opening degree decrease amount), if Tc is less than T0, the cell-heat-exchanger-side opening degree of the three-way flow rate adjustment valve 5 is adjusted in the opening direction, the calculated amount to be adjusted is a positive value (i.e., a second opening degree increase amount), and if Tc is equal to T0, the amount to be adjusted is 0.
More specifically, when the heat source 2 is operated at the maximum output power in the air-conditioning battery combined heating system, the opening degree of the three-way flow rate adjustment valve 5 takes the second opening degree reduction amount (negative value or 0), that is, the cell heat exchanger side opening degree of the three-way flow rate adjustment valve 5 is reduced, when the detected value Td of the first temperature sensor 7 is greater than or equal to the radiator inlet temperature threshold value T1 and the detected value Tc of the second temperature sensor 8 is greater than or equal to the cell inlet temperature threshold value T0. Therefore, the temperature of the battery can be reduced first, and the temperature of the battery is not overhigh. Further, the output of the heat source 2 may be reduced.
When the detected value Td of the first temperature sensor 7 is greater than or equal to the radiator inlet temperature threshold value T1 and the detected value Tc of the second temperature sensor 8 is less than the battery inlet temperature threshold value T0, it is indicated that the operating temperature of the radiator 3 is excessively high or moderate and the operating temperature of the battery heat exchanger 4 is low. The controller calculates the first opening degree increase amount (positive value or 0) and the second opening degree increase amount (positive value) as described above. If the controller actually adjusts the opening degree of the three-way flow rate control valve 5 on the battery heat exchanger side according to the larger one of the two, the heating demand of the battery can be satisfied well, but the disturbance on the radiator 3, that is, the air conditioner side is large, and the passenger may feel a sense of discomfort of sudden temperature drop. In this case, therefore, the controller actually adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 according to the smaller of the two. In other words, the controller adjusts the opening degree of the three-way flow rate adjustment valve 5 so as to ensure the heat distribution on the air-conditioning side, and the supply of the high-temperature coolant to the battery heat exchanger 4 side can be increased appropriately.
When the detected value Td of the first temperature sensor 7 is less than the radiator inlet temperature threshold value T1 and the detected value Tc of the second temperature sensor 8 is greater than or equal to the battery inlet temperature threshold value T0, it is indicated that the operating temperature of the radiator 3 is low and the operating temperature of the battery heat exchanger 4 is excessively high or moderate. At this time, the controller decreases the amount (negative value) according to the first opening degree and the second opening degree calculated as described above (negative value or 0). If the controller actually adjusts the opening degree of the three-way flow control valve 5 on the battery heat exchanger side according to the larger one of the two, the heating on the battery side can be maintained, but it is difficult to satisfy the heating demand of the air conditioner in the vehicle interior, and the vehicle interior temperature rises slowly, which may give the passengers a sense of discomfort. In this case, therefore, the controller actually adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 according to the smaller of the two. In other words, the controller adjusts the opening degree of the three-way flow rate adjustment valve 5 in such a manner as to ensure the heat distribution on the air conditioning side, preferentially satisfying the demand for vehicle interior heating.
When the detected value Td of the first temperature sensor 7 is smaller than the radiator inlet temperature threshold value T1 and the detected value Tc of the second temperature sensor 8 is smaller than the battery inlet temperature threshold value T0, it is explained that the operating temperatures of both the radiator 3 and the battery heat exchanger 4 are low. At this time, the controller calculates the first opening degree decrease amount (negative value) and the second opening degree increase amount (positive value) of the cell heat exchanger side opening degree of the three-way flow rate adjustment valve 5 as described above. Since both cannot be obtained, the heating demand on the air-conditioning side can be preferentially secured by actually adjusting the three-way flow rate adjustment valve 5 by the first opening degree reduction amount, which is the smaller one of the controllers.
In this manner, the controller adjusts the opening degree of the three-way flow rate adjustment valve 5 based on the smaller of the first opening degree increase amount or the first opening degree decrease amount, which is the first adjustment amount a, and the second opening degree increase amount or the second opening degree decrease amount, which is the second adjustment amount B, and thus the heat distribution control can be performed so as to ensure the heating demand on the air-conditioning side. In the above description, the controller has been described as adjusting the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 based on the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8, but the present invention is not limited to this, and the heat distribution control may be performed so that the heating demand on the air conditioning side can be secured by adjusting the radiator side opening degree of the three-way flow rate adjustment valve 5 based on the detection values of the two sensors, and in this case, the adjustment is performed based on the larger of the two calculated amounts to be adjusted.
Similarly, the controller may calculate the flow rate of the coolant in each flow path from the opening degree of the three-way flow rate control valve 5, the power of the water pump, and the like, calculate the radiator heat release amount Pd and the battery heat exchanger heat release amount Pc from the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8, and perform the heat distribution control based on the radiator heat release amount Pd and the battery heat exchanger heat release amount Pc. Specifically, the controller calculates a third adjustment amount by which the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 should theoretically be adjusted in the opening direction or the closing direction based on the difference between the radiator heat release amount Pd and a preset radiator heat threshold P1, calculates a fourth adjustment amount by which the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 should theoretically be adjusted in the opening direction or the closing direction based on the difference between the battery heat exchanger heat release amount Pc and a preset battery heat exchanger heat release threshold P0, and then adjusts the opening degree of the three-way flow rate adjustment valve 5 based on the smaller one of the third adjustment amount and the fourth adjustment amount. Therefore, as described above, the controller can adjust the opening degree of the three-way flow rate adjustment valve 5 so as to ensure the heat distribution on the air-conditioning side.
In the air conditioning battery combined heating system, the controller performs a plurality of control methods of controlling the heat distribution based on the control target. In the actual control process, the controller determines whether the heat source heat release amount is sufficient or not by comparing the heat source heat release amount P (the actual heat release amount of the heat source 2) = the heat radiator heat release amount Pd + the battery heat exchanger heat release amount Pc, and the system required heat release amount P' = the heat radiator heat threshold P1+ the battery heat exchanger heat release amount threshold P0, thereby determining which control method is specifically adopted.
When P is equal to or greater than P', that is, when the heat source heat release amount P is sufficient, if at least one of the radiator 3 and the battery heat exchanger 4 is lower than the self-target threshold value, the controller adjusts the battery heat exchanger side opening degree of the three-way flow rate adjustment valve 5 based on the detection value Tc of the second temperature sensor 8 or the calculated battery heat exchanger heat release amount Pc, thereby preferentially ensuring that the water temperature on the battery side reaches the target temperature.
When P is smaller than P', that is, the heat source heat release amount P is insufficient, the controller preferentially controls to increase the output power of the heat source 2 if the power of the heat source 2 is lower than the maximum output power. On the other hand, in a situation such as a winter start of the vehicle, where the heat source 2 has already been operating at the maximum output power but the heat source heat release amount P is still insufficient, the controller simultaneously adjusts the opening degree of the three-way flow rate adjustment valve 5 based on the smaller of the adjustment amounts calculated by the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8 (or both the radiator heat release amount Pd and the battery heat exchanger heat release amount Pc). This ensures heat distribution on the air conditioning side when the heat source heat radiation amount is insufficient, and can preferentially ensure the minimum influence on vehicle interior heating.
(Heat distribution method based on changing target threshold)
In the present invention, the controller may perform the heat distribution control by changing the target threshold value of the battery heat exchanger 4, in addition to the heat distribution control based on the control object. By changing the battery inlet temperature threshold T0 as the target water temperature or the battery heat exchanger heat release threshold P0 as the target heat release, the difference between the detected value Tc of the second temperature sensor 8 and the battery inlet temperature threshold T0 or the difference between the battery heat exchanger heat release Pc and the battery heat exchanger heat release threshold P0 can be changed, whereby the heat demand of the battery heat exchanger 4 can be changed. The controller increases or decreases the heat distributed to one side of the battery or the air conditioner by adjusting the opening of the three-way flow regulating valve 5, so as to meet the heating requirement of the other side. The following description will be given taking, as an example, the change of the battery inlet temperature threshold T0 of the battery heat exchanger 4 with reference to fig. 3.
Fig. 3 is a schematic diagram of the controller adjusting the battery inlet temperature threshold T0 according to the heat source heat release P, where the horizontal axis represents the heat source heat release P and the vertical axis represents the battery inlet temperature threshold T0. As shown in FIG. 3, when the heat source heat release P is less than the system demand heat release P', i.e., the heat source 2 is emitting insufficient heat, the controller may decrease the battery inlet temperature threshold T0 to T02Reducing the heat allocated to the battery by reducing the heat requirement of the battery heat exchanger 4, and then based on the battery inlet temperature threshold T02The opening degree of the three-way flow regulating valve 5 is regulated, and the flow of the cooling liquid entering the in-vehicle heating circuit 200 and the battery heating circuit 400 is automatically distributed, so that the requirement of heating in the vehicle chamber can be met as much as possible, and the discomfort of passengers is avoided. When the heat source heat release amount P is greater than or equal to the system required heat release amount P', that is, the heat source 2 releases enough heat, the controller can increase the battery inlet temperature threshold T0 to T01Increasing the heat allocated to the battery by increasing the heat requirement of the battery heat exchanger 4, and then based on the battery inlet temperature threshold T01The opening degree of the three-way flow regulating valve 5 is regulated, and the flow of the cooling liquid entering the in-vehicle heating loop 200 and the battery heating loop 400 is automatically distributed, so that the battery heating efficiency can be improved under the conditions of meeting the heating requirement in the vehicle room and avoiding the discomfort of passengers. In addition to varying the battery inlet temperature threshold T0, it may also be by varying the battery heat exchangerThe heat release amount threshold P0 regulates the amount of heat distributed to the battery side.
Similarly, the heat demand of the radiator 3 may be changed by changing the target threshold value of the radiator 3, that is, changing the radiator inlet temperature threshold value T1 as the target water temperature or the radiator heat threshold value P1 as the target heat radiation amount, as described above. For example, the target threshold value of the radiator 3 may be lowered when the heat source radiation amount P is insufficient, and the target threshold value of the radiator 3 may be raised when the heat source radiation amount P is sufficient, so that the radiator 3 and the battery heating can be combined as much as possible when the heat radiation capacity is limited, and the minimum heat demand of the battery side and the air conditioner side can be satisfied as much as possible. The specific adjustment method is similar to that described above and will not be described herein.
In the above-described calorie distribution method based on changing the target threshold, the target threshold may be changed step by step in accordance with a Road map (Road map) defined in advance, thereby realizing gradual calorie distribution control. In addition, the invention can also adjust the heat requirement of the air conditioner and the battery by simultaneously changing the target threshold values of the air conditioner side and the battery side.
In the actual control, for example, when the heat source heat release amount P is insufficient, the heating demand on the air-conditioning side can be secured by a method of changing the target threshold value, and when the heat source heat release amount P is sufficient, the heating demand on the air-conditioning side and the heating demand on the battery side can be satisfied by a method of changing the control target.
(Heat distribution method for changing control object and target threshold)
Further, in the present invention, the controller may perform the heat distribution control by combining two methods of changing the control target and changing the target threshold.
For example, in the case where the heat source heat release amount P is insufficient when the vehicle starts defrosting in winter, the radiator inlet temperature threshold T1 or the radiator heat threshold P1 may be set to the lowest value that satisfies the air conditioning demand, and then the opening degree of the three-way flow rate adjustment valve 5 may be controlled based on the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8 at the same time, whereby the battery may be heated at the fastest speed while preferentially securing the amount of heat distributed to the air conditioning side. After the heat demand of the battery is gradually reduced as the temperature of the battery rises, resulting in a sufficient heat release amount of the heat source, the controller instead controls the opening degree of the three-way flow rate adjustment valve 5 based on the detection value Tc of the second temperature sensor 8 and raises the radiator inlet temperature threshold T1 to the conventional threshold.
Similarly, the vehicle interior may be heated at the fastest speed while preferentially securing the heat distributed to the battery side by first setting the battery inlet temperature threshold T0 or the battery heat exchanger heat release threshold P0 to the lowest value that satisfies the battery heating demand and then controlling the opening degree of the three-way flow rate adjustment valve 5 based on both the detection value Td of the first temperature sensor 7 and the detection value Tc of the second temperature sensor 8. After the demand for the air-conditioning side heat gradually decreases with an increase in the vehicle compartment temperature, resulting in a sufficient heat source heat release, the controller instead controls the opening degree of the three-way flow rate adjustment valve 5 based on the detection value Td of the first temperature sensor 7, and raises the battery inlet temperature threshold T0 or the battery heat exchanger heat release threshold P0 to the normal threshold.
The above-described heat distribution methods are all feedback control methods, that is, the controller continuously reads the detection value Td of the first temperature sensor 7 and/or the detection value Tc of the second temperature sensor 8 to perform feedback control. The various heat distribution methods described above are not limited to the air-conditioning battery combination heating system shown in fig. 1, and the heat control system of the present invention can be applied to any heating circuit that can distribute coolant at different temperatures and flow rates from the heat source 2 to the radiator 3 and the battery heat exchanger 4.
The above embodiments are intended to illustrate and not to limit the scope of the invention, which is defined by the claims, but rather by the claims, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (17)

1. A heat distribution control system of an air conditioner battery combined heating system is characterized in that,
the method comprises the following steps: an in-vehicle heating circuit having a first pump and a heat radiator, a battery heating circuit having a second pump and a battery heat exchanger, and two branches connecting the in-vehicle heating circuit and the battery heating circuit, respectively;
a heat source is arranged on the heating loop in the vehicle;
a three-way flow regulating valve is arranged on at least one connecting point of the two branches, which is connected with the in-vehicle heating loop and the battery heating loop;
a first temperature sensor is disposed on an inlet side of the radiator, and a second temperature sensor is disposed on an inlet side of the battery heat exchanger;
the controller is used for adjusting the output of the heat source and the opening degree of the three-way flow regulating valve based on the detection value of the first temperature sensor and/or the second temperature sensor.
2. The heat distribution control system of an air conditioning battery combined heating system according to claim 1,
the controller adjusts an output of the heat source based on a detection value of the first temperature sensor.
3. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller adjusts the opening degree of the three-way flow control valve based on a detection value of a second temperature sensor.
4. The heat distribution control system of an air conditioning battery combined heating system according to claim 3,
the controller performs the adjustment based on the detection value of the second temperature sensor in the following manner:
comparing the detection value of the second temperature sensor with a preset battery inlet temperature threshold value,
when the detection value of the second temperature sensor is lower than the battery inlet temperature threshold value, the battery heat exchanger side opening degree of the three-way flow regulating valve is regulated to the opening direction, so that the cooling liquid flowing into the battery heat exchanger is increased,
and when the detection value of the second temperature sensor is higher than the battery inlet temperature threshold value, adjusting the side opening of the battery heat exchanger of the three-way flow regulating valve to the closing direction, so that the cooling liquid flowing into the battery heat exchanger is reduced.
5. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller calculates the heat release of the battery heat exchanger, compares the heat release of the battery heat exchanger with a preset heat release threshold of the battery heat exchanger, and adjusts the heat release based on the battery heat exchanger in the following mode:
when the heat release amount of the battery heat exchanger is lower than the heat release amount threshold value of the battery heat exchanger, adjusting the side opening of the battery heat exchanger of the three-way flow regulating valve to the opening direction to increase the cooling liquid flowing into the battery heat exchanger;
and when the heat release amount of the battery heat exchanger is higher than the heat release amount threshold value of the battery heat exchanger, adjusting the side opening of the battery heat exchanger of the three-way flow regulating valve to the closing direction, so that the cooling liquid flowing into the battery heat exchanger is reduced.
6. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller adjusts the opening degree of the three-way flow control valve based on a detection value of a first temperature sensor.
7. The heat distribution control system of an air conditioning battery combined heating system according to claim 6,
the controller performs the adjustment based on the detection value of the first temperature sensor in the following manner:
comparing the detection value of the first temperature sensor with a preset inlet temperature threshold value of the radiator,
when the detection value of the first temperature sensor is lower than the radiator inlet temperature threshold value, the radiator side opening of the three-way flow control valve is adjusted in the opening direction to increase the coolant flowing into the radiator,
when the detection value of the first temperature sensor is higher than the radiator inlet temperature threshold value, the radiator side opening degree of the three-way flow control valve is adjusted in the closing direction, and the cooling liquid flowing into the radiator is reduced.
8. The heat distribution control system of an air conditioning battery combined heating system according to claim 6,
the controller calculates heat exchanger heat release, compares the heat exchanger heat release with a preset heat radiator heat threshold, and performs heat exchanger heat release-based adjustment in the following manner:
when the heat release amount of the heat exchanger is lower than the heat radiator heat threshold value, adjusting the radiator side opening of the three-way flow regulating valve to the opening direction, so that the cooling liquid flowing into the radiator is increased;
and when the heat release amount of the heat exchanger is higher than the heat radiator heat threshold value, adjusting the radiator side opening of the three-way flow regulating valve to the closing direction, so that the cooling liquid flowing into the radiator is reduced.
9. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller adjusts the opening degree of the three-way flow regulating valve based on the detection values of the first temperature sensor and the second temperature sensor.
10. The heat distribution control system of an air conditioning battery combined heating system as set forth in claim 9,
the controller performs the adjustment based on the detection values of the first temperature sensor and the second temperature sensor in the following manner:
comparing the detection value of the first temperature sensor with a preset inlet temperature threshold value of a heat radiator, and calculating a first adjustment quantity of the three-way flow regulating valve for adjusting the side opening of the battery heat exchanger in the opening direction or the closing direction based on the difference value of the detection value and the inlet temperature threshold value;
comparing the detection value of the second temperature sensor with a preset battery inlet temperature threshold value, and calculating a second adjustment quantity of the three-way flow regulating valve for adjusting the side opening of the battery heat exchanger in the opening direction or the closing direction based on the difference value of the detection value of the second temperature sensor and the preset battery inlet temperature threshold value;
the controller adjusts the three-way flow rate adjustment valve based on the smaller of the first adjustment amount and the second adjustment amount.
11. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller performs the adjustment based on the heat exchanger heat release and the battery heat exchanger heat release in the following form:
the controller calculates the heat release amount of the heat exchanger, compares the heat release amount of the heat exchanger with a preset heat threshold of the heat radiator, and calculates a third regulating quantity of the three-way flow regulating valve, which is required to regulate the side opening of the battery heat exchanger in the opening direction or the closing direction, based on the difference value of the heat release amount of the heat exchanger and the heat threshold of the heat radiator;
the controller calculates the heat release of the battery heat exchanger, compares the heat release of the battery heat exchanger with a preset heat release threshold of the battery heat exchanger, and calculates a fourth adjustment quantity of the three-way flow regulating valve for adjusting the side opening of the battery heat exchanger towards the opening direction or the closing direction based on the difference value of the heat release of the battery heat exchanger and the preset heat release threshold of the battery heat exchanger;
the controller adjusts the three-way flow rate adjustment valve based on the smaller of the third adjustment amount and the fourth adjustment amount.
12. The heat distribution control system of an air-conditioning-battery combined heating system according to any one of claims 4 to 11,
the controller calculates heat source heat release based on the sum of the heat exchanger heat release and the battery heat exchanger heat release, and adjusts the opening of the three-way flow regulating valve according to the comparison result of the calculated heat source heat release and the sum of the heat exchanger heat release threshold and the battery heat exchanger heat release threshold in the following form:
when the heat source heat release is smaller than the sum of the heat radiator heat threshold and the battery heat exchanger heat release threshold, the controller adjusts the opening of the three-way flow regulating valve based on the detection values of the first temperature sensor and the second temperature sensor;
and when the heat source heat release amount is larger than or equal to the sum of the heat emitter heat threshold and the battery heat exchanger heat release amount threshold, the controller adjusts the opening of the three-way flow regulating valve based on the detection value of the second temperature sensor.
13. The heat distribution control system of an air-conditioning-battery combined heating system according to any one of claims 4 to 11,
the controller calculates heat source heat release based on the sum of the heat exchanger heat release and the battery heat exchanger heat release, and adjusts the opening of the three-way flow regulating valve according to the comparison result of the calculated heat source heat release and the sum of the heat exchanger heat release threshold and the battery heat exchanger heat release threshold in the following form:
when the heat source heat release is smaller than the sum of the heat emitter heat threshold and the battery heat exchanger heat release threshold, the controller adjusts the opening of the three-way flow regulating valve based on the heat exchanger heat release and the battery heat exchanger heat release;
and when the heat source heat release is greater than or equal to the sum of the heat radiator heat threshold and the battery heat exchanger heat release threshold, the controller adjusts the three-way flow regulating valve based on the heat release of the battery heat exchanger.
14. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller calculates a heat source heat release amount based on the sum of the heat exchanger heat release amount and the battery heat exchanger heat release amount, adjusts the battery inlet temperature threshold or the battery heat exchanger heat release amount threshold according to the comparison result of the calculated heat source heat release amount and the sum of the heat exchanger heat release amount threshold and the battery heat exchanger heat release amount threshold in the following form, and controls the opening of the three-way flow regulating valve based on the adjusted battery inlet temperature threshold or battery heat exchanger heat release amount threshold:
when the heat source heat release is less than the sum of the heat emitter heat threshold and the battery heat exchanger heat release threshold, the controller reduces the battery inlet temperature threshold or the battery heat exchanger heat release threshold;
when the heat source heat release is greater than or equal to the sum of the heat radiator heat threshold and the battery heat exchanger heat release threshold, the controller raises the battery inlet temperature threshold or the battery heat exchanger heat release threshold.
15. The heat distribution control system of an air conditioning battery combined heating system according to claim 2,
the controller calculates a heat source heat release amount based on a sum of the heat exchanger heat release amount and the battery heat exchanger heat release amount, adjusts the heat radiator inlet temperature threshold or the heat radiator heat threshold according to a comparison result of the calculated heat source heat release amount and a sum of the heat exchanger heat release amount threshold and the battery heat exchanger heat release amount threshold in the following form, and controls the opening of the three-way flow regulating valve based on the adjusted heat radiator inlet temperature threshold or heat radiator heat threshold:
when the heat source heat release is less than the sum of the heat emitter heat threshold and the battery heat exchanger heat release threshold, the controller decreases the heat emitter inlet temperature threshold or the heat emitter heat threshold;
the controller increases the heat emitter inlet temperature threshold or the heat emitter heat threshold when the heat source heat emission is greater than or equal to a sum of the heat emitter heat threshold and the battery heat exchanger heat emission threshold.
16. The heat distribution control system of an air-conditioning-battery combined heating system as recited in any one of claims 1 to 15,
the controller calculates a heat source heat release based on a sum of the heat exchanger heat release and the battery heat exchanger heat release, and when the calculated heat source heat release is less than a sum of the heat emitter heat threshold and the battery heat exchanger heat release threshold, the controller performs the following operations:
the controller sets the inlet temperature threshold value of the radiator or the heat threshold value of the radiator to be the lowest value meeting the requirements of an air conditioner, adjusts the opening degree of the three-way flow regulating valve based on the detection values of the first temperature sensor and the second temperature sensor, adjusts the opening degree of the three-way flow regulating valve based on the detection value of the second temperature sensor after the temperature of a battery rises or the heat release amount of the heat source is greater than or equal to the sum of the heat threshold value of the radiator and the heat threshold value of the battery heat exchanger, and increases the inlet temperature threshold value of the radiator or the heat threshold value of the radiator to be a conventional threshold value.
17. The heat distribution control system of an air-conditioning-battery combined heating system as recited in any one of claims 1 to 15,
the controller calculates a heat source heat release based on a sum of the heat exchanger heat release and the battery heat exchanger heat release, and when the calculated heat source heat release is less than a sum of the heat emitter heat threshold and the battery heat exchanger heat release threshold, the controller performs the following operations:
the controller sets the battery inlet temperature threshold or the battery heat exchanger heat release threshold to be the lowest value meeting the battery heating requirement, adjusts the opening degree of the three-way flow regulating valve based on the detection values of the first temperature sensor and the second temperature sensor, adjusts the opening degree of the three-way flow regulating valve based on the detection value of the first temperature sensor after the battery is increased or the heat source heat release is greater than or equal to the sum of the heat emitter heat threshold and the battery heat exchanger heat release threshold, and increases the battery inlet temperature threshold or the battery heat exchanger heat release threshold to be a conventional threshold.
CN202110259855.6A 2021-03-10 2021-03-10 Heat distribution control system of air conditioner battery combined heating system Pending CN114274725A (en)

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JP2023505167A JP7491460B2 (en) 2021-03-10 2022-01-18 Heat distribution control system for air conditioning and battery-operated heating system
PCT/JP2022/001521 WO2022190641A1 (en) 2021-03-10 2022-01-18 Heat quantity distribution control system for air conditioner/battery cooperative heating system

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