CN114516253B - Heating energy distribution method and related device of heat pump air conditioner - Google Patents
Heating energy distribution method and related device of heat pump air conditioner Download PDFInfo
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- CN114516253B CN114516253B CN202011301664.3A CN202011301664A CN114516253B CN 114516253 B CN114516253 B CN 114516253B CN 202011301664 A CN202011301664 A CN 202011301664A CN 114516253 B CN114516253 B CN 114516253B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 317
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
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Classifications
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00792—Arrangement of detectors
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00835—Damper doors, e.g. position control
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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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
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides a heating energy distribution method of a heat pump air conditioner and a related device, wherein the method comprises the steps of controlling a heat pump system to heat by taking the total heating power required to be generated by the heat pump air conditioner as the target heating power of the heat pump system when the total heating power required to be generated by the heat pump air conditioner is not more than the maximum heating power which can be currently provided by the heat pump system of the heat pump air conditioner; when the total heating power required to be generated by the heat pump air conditioner is larger than the maximum heating power currently available by the heat pump system of the heat pump air conditioner, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the rest required heating powers are used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat. Therefore, the heating capacity of the heat pump system is exerted to the greatest extent, the PTC is controlled to perform accurate heating, the comfort level of a user is ensured, and the energy consumption of the battery is reduced as much as possible.
Description
Technical Field
The invention relates to the technical field of heat pump air conditioners, in particular to a heating energy distribution method and a related device of a heat pump air conditioner.
Background
The heating principle of the heat pump air conditioner is that a certain electric energy is input to the heat pump system to drive the compressor to work, so that R134a refrigerant in the unit repeatedly generates a physical phase change process of evaporation heat absorption and condensation heat release, and further, the heat exchange and transfer in space are realized.
In winter, at low ambient temperature, the physical characteristics of the R134a refrigerant are easier to liquefy, so that the heating capacity of the heat pump system is limited, but the user needs to maintain the comfortable air outlet temperature in the vehicle, so that the assistance of the high-voltage electric heater (i.e., PTC) is essential. In the existing heat pump air conditioner, PTC (Positive temperature coefficient) is excessively heated, so that the energy of a whole vehicle battery is wasted, and the endurance of the battery is insufficient; PTC heats too little, can't guarantee user's warm braw demand again, and heat pump air conditioner travelling comfort is insufficient.
Disclosure of Invention
In view of this, the present invention provides a heating energy distribution method and related device for a heat pump air conditioner, which is intended to achieve accurate heating of PTC in the heat pump air conditioner, and reduce battery energy consumption while ensuring user comfort.
In order to achieve the above object, the following solutions have been proposed:
in a first aspect, a heating energy distribution method of a heat pump air conditioner is provided, including:
calculating to obtain the total heating power required to be generated by the heat pump air conditioner;
calculating to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present;
when the total heating power is not greater than the maximum heating power, controlling the heat pump system to heat by taking the total heating power as the target heating power of the heat pump system;
when the total heating power is larger than the maximum heating power, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the difference value between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat.
Preferably, the calculating obtains the total heating power required to be generated by the heat pump air conditioner, specifically including:
the total heating power required to be generated by the heat pump air conditioner is calculated according to a total heating power formula, wherein the total heating power formula is as follows:
TGQ＝1.16×Cpa×Ga×γa×N×(TCO-Te)
wherein TGQ is total heating power, cpa is specific heat capacity of air, ga is blower air volume of the heat pump air conditioner, gamma a is density of air, N is opening degree of a temperature air door of the heat pump air conditioner, TCO is air outlet target temperature of the heat pump air conditioner, and Te is actual temperature of an evaporator of the heat pump air conditioner.
Preferably, the calculating obtains the maximum heating power currently available for the heat pump system of the heat pump air conditioner, and specifically includes:
matching to obtain the maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle by utilizing the preset corresponding relation between the temperature outside the vehicle and the maximum current of the electric compressor;
matching the preset corresponding relation between the outside temperature, the air quantity of the air blower and the heat exchange efficiency of the heat pump to obtain the heat exchange efficiency of the heat pump corresponding to the current outside actual temperature and the air quantity of the air blower;
the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present is obtained through calculation according to a maximum power formula of the heat pump, wherein the maximum power formula of the heat pump is Qmax=f×cop×U×Imax, wherein 1.1 > f > 0.9, cop is heat exchange efficiency of the heat pump corresponding to the current actual temperature outside the vehicle and the current air quantity of the air blower, imax is maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle, and U is current voltage of the electric compressor.
Preferably, when the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to perform heating, and the difference between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to perform heating, the method further comprises:
and adjusting the actual heating power of the PTC in real time according to the actual heating power of the heat pump system so that the sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power.
In a second aspect, there is provided a heating energy distribution device of a heat pump air conditioner, comprising:
the total heating power unit is used for calculating the total heating power required to be generated by the heat pump air conditioner;
the heat pump maximum heating power unit is used for calculating and obtaining the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present;
a first heating processing unit, configured to control the heat pump system to perform heating by using the total heating power as a target heating power of the heat pump system when the total heating power is not greater than the maximum heating power;
and the second heating treatment unit is used for controlling the heat pump system to heat by taking the maximum heating power as the target heating power of the heat pump system when the total heating power is larger than the maximum heating power, and controlling the PTC to heat by taking the difference value of the total heating power and the maximum heating power as the target heating power of the PTC of the heat pump air conditioner.
Preferably, the total heating power unit is specifically configured to:
the total heating power required to be generated by the heat pump air conditioner is calculated according to a total heating power formula, wherein the total heating power formula is as follows:
TGQ＝1.16×Cpa×Ga×γa×N×(TCO-Te)
wherein TGQ is total heating power, cpa is specific heat capacity of air, ga is blower air volume of the heat pump air conditioner, gamma a is density of air, N is opening degree of a temperature air door of the heat pump air conditioner, TCO is air outlet target temperature of the heat pump air conditioner, and Te is actual temperature of an evaporator of the heat pump air conditioner.
Preferably, the maximum heating power unit of the heat pump specifically includes:
the maximum current subunit is used for matching the preset corresponding relation between the outside temperature and the maximum current of the electric compressor to obtain the maximum current of the electric compressor corresponding to the actual outside temperature;
the heat pump heat exchange efficiency subunit is used for obtaining the heat pump heat exchange efficiency corresponding to the current actual temperature outside the vehicle and the current air quantity of the air blower by matching by utilizing the preset corresponding relation between the temperature outside the vehicle and the air quantity of the air blower and the heat pump heat exchange efficiency;
the heat pump maximum heating power subunit is configured to calculate, according to a heat pump maximum power formula, a maximum heating power that can be provided by a heat pump system of the heat pump air conditioner at present, where the heat pump maximum power formula is qmax=f×cop×u×imax, where 1.1 > f > 0.9, cop is a heat pump heat exchange efficiency corresponding to a current actual temperature outside the vehicle and a current blower air volume, imax is a maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle, and U is a current voltage of the electric compressor.
Preferably, the second heating processing unit is further configured to, when the maximum heating power is used as a target heating power of the heat pump system to control the heat pump system to perform heating, and when a difference value between the total heating power and the maximum heating power is used as a target heating power of a PTC of the heat pump air conditioner to control the PTC to perform heating, adjust the actual heating power of the PTC in real time according to the actual heating power of the heat pump system, so that a sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power.
In a third aspect, there is provided a readable storage medium having stored thereon a program which, when executed by a processor, implements the steps of the heating energy distribution method of any one of the heat pump air conditioners as in the first aspect.
In a fourth aspect, a heat pump air conditioner is provided, including a heat pump air conditioner controller, and an evaporator temperature sensor, an electric compressor, an off-vehicle temperature sensor, a PTC, a blower, and a temperature damper opening sensor, which are respectively in communication with the heat pump air conditioner controller, the heat pump air conditioner controller including a memory and a processor;
the memory is used for storing programs;
the processor is configured to execute the program to implement the steps of the heating energy distribution method of the heat pump air conditioner according to any one of the first aspect.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the method comprises the steps of controlling a heat pump system to heat by taking the total heating power required to be generated by the heat pump air conditioner as the target heating power of the heat pump system when the total heating power required to be generated by the heat pump air conditioner is not greater than the maximum heating power currently available by the heat pump system of the heat pump air conditioner; when the total heating power required to be generated by the heat pump air conditioner is larger than the maximum heating power currently available by the heat pump system of the heat pump air conditioner, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the rest required heating powers are used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat. Therefore, the heating capacity of the heat pump system is exerted to the greatest extent, the PTC is controlled to perform accurate heating, the comfort level of a user is ensured, and the energy consumption of the battery is reduced as much as possible.
Further, the total heating power required to be generated by the heat pump air conditioner is calculated through a total heating power formula TGQ =1.16×Cpa×Ga×γa×N× (TCO-Te), so that the accuracy of a calculation result is ensured, and further, the heating energy distribution is more accurate.
Still further, setting up corresponding electric compressor maximum current to different outside temperatures, having restricted the rotational speed of electric compressor under different outside temperatures, and then prevent that the temperature of inhaling is too low, realized the protection to electric compressor.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a heat pump air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a heating energy distribution method of a heat pump air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a heating energy distribution device of a heat pump air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a heat pump air conditioner controller according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a schematic diagram of a heat pump air conditioner according to the present embodiment shows a connection relationship between some components. The heat pump air conditioner includes a heat pump air conditioner controller 11, an evaporator temperature sensor 12, an electric compressor 13, an off-vehicle temperature sensor 14, a PTC15, a blower 16, and a temperature damper opening sensor 17, which are communicatively connected with the heat pump air conditioner controller 11, respectively.
Referring to fig. 2, a heating energy distribution method of a heat pump air conditioner according to the present embodiment is applicable to a heat pump air conditioner controller 11, and includes the following steps:
s21: and calculating to obtain the total heating power required to be generated by the heat pump air conditioner.
In some embodiments, the total heating power required to be generated by the heat pump air conditioner is calculated according to the total heating power formula, so that the accuracy of a calculation result is ensured, and further, the heating energy distribution is more accurate. The formula of the total heating power is as follows:
TGQ＝1.16×Cpa×Ga×γa×N×(TCO-Te)
wherein TGQ is total heating power, cpa is specific heat capacity of air, ga is blower air volume of the heat pump air conditioner, gamma a is density of air, N is opening degree of a temperature air door of the heat pump air conditioner, TCO is air outlet target temperature of the heat pump air conditioner, and Te is actual temperature of an evaporator of the heat pump air conditioner. Cpa and γa are both constants. After a heat pump system of the heat pump air conditioner is started, the actual temperature Te of the evaporator is acquired through the evaporator temperature sensor 12, the actual temperature Tam outside the vehicle is acquired through the outside temperature sensor 14, and the opening N of the temperature air door is acquired through the temperature air door opening sensor 17, wherein the value range of the opening N of the temperature air door is 0-100%. The air conditioner controller 11 calculates the target temperature TCO of the air outlet of the heat pump air conditioner by using a preset PI control algorithm according to the data such as the air conditioner temperature set by the user and the actual temperature Tam outside the vehicle. The corresponding relation exists between the blower air quantity Ga of the heat pump air conditioner and the blower gear, and the blower air quantity Ga is obtained according to the blower gear set by a user. And 1.16 is the coefficient of energy unit conversion.
For a four speed blower, the blower air volume Ga versus blower speed D is shown in the following table:
| blower gear D | Blower air volume Ga |
| 1 | Ga1 |
| 2 | Ga2 |
| 3 | Ga3 |
| 4 | Ga4 |
The higher the blower shift D, the larger the blower air volume Ga.
S22: and calculating to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present.
The higher the current of the motor compressor 13 of the heat pump air conditioner, the higher the rotation speed, and thus the higher the heating power of the heat pump system. By determining the highest rotational speed currently achievable by the motor-driven compressor 13, the maximum heating power currently available to the heat pump system can be calculated.
S23: and when the total heating power is not greater than the maximum heating power, controlling the heat pump system to heat by taking the total heating power as the target heating power of the heat pump system.
Specifically, according to the heat pump power formula q=f×cop×u×i, the current of the motor-driven compressor 13 when the heat pump system is to achieve the target heating power can be calculated. Wherein f is the calibration coefficient of the whole vehicle, 1.1 > f > 0.9, cop is the heat pump heat exchange efficiency corresponding to the current actual temperature outside the vehicle and the current air quantity of the blower, U is the current voltage of the electric compressor, Q is the target heating power of the heat pump system, and I is the current of the electric compressor 13 when the heat pump system is required to reach the target heating power. The corresponding relation exists between the current and the rotating speed of the electric compressor 13, the rotating speed corresponding to the current of the electric compressor 13 when the heat pump system is about to reach the target heating power is obtained, and the electric compressor 13 is controlled to operate according to the rotating speed, so that the heat pump system can heat according to the target heating power.
In the bench test, the ratio (COP) of the heat generated by the heat pump system to the energy consumed by the electric compressor 13 under different outside temperatures and blower air volumes is calculated, and the corresponding relationship between the outside temperatures, the blower air volumes and the heat exchange efficiency of the heat pump is obtained. For example, when the temperature outside the vehicle is-10 ℃, the air quantity of the blower is Ga1, the heat generated by the heat pump system is 4kw, and the energy consumed by the electric compressor 13 is 1.9kw, the COP=4/1.9, and when the temperature outside the vehicle is-10 ℃, the air quantity Ga1 of the blower corresponds to the COP=4/1.9.
S24: when the total heating power is larger than the maximum heating power, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the difference value between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat.
And calculating the power of the PTC according to the conversion efficiency of the electric energy and the heat energy of the PTC and the target heating power of the PTC, and heating.
According to the method provided by the embodiment, the heating capacity of the heat pump system is exerted to the greatest extent, and the PTC is controlled to perform accurate heating, so that the comfort level of a user is ensured, and the energy consumption of the battery is reduced as much as possible.
In some embodiments, the process of calculating the maximum heating power currently available to the heat pump system of the heat pump air conditioner may include the steps of:
step 221: and matching the preset corresponding relation between the temperature outside the vehicle and the maximum current of the electric compressor to obtain the maximum current of the electric compressor corresponding to the actual temperature outside the vehicle.
The corresponding maximum electric compressor current Imax is set for different outside temperatures Tam, so that the rotating speed of the electric compressor 13 at the different outside temperatures Tam is limited, and the air suction temperature is prevented from being too low, so that the electric compressor is protected.
Step 222: and matching the preset corresponding relation between the outside temperature, the air quantity of the air blower and the heat exchange efficiency of the heat pump to obtain the heat exchange efficiency of the heat pump corresponding to the current outside actual temperature and the air quantity of the air blower.
The table below shows the correspondence between the outside temperature, the blower air volume and the heat exchange efficiency of the heat pump, which are obtained by bench test of a certain vehicle type. The temperature outside the automobile is divided into three ranges, the air blower is in four gears, and each gear corresponds to one air blower air quantity. The numerical value is the heat exchange efficiency of the corresponding heat pump under the corresponding row and column conditions, for example, the heat exchange efficiency of the heat pump of the second row and the second column is 2.1, namely, the heat exchange efficiency of the heat pump when the actual temperature outside the vehicle is greater than Tam1 and the air quantity of the blower is Ga 1.
Step 223: and calculating according to a maximum power formula of the heat pump to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present. The maximum power formula of the heat pump is as follows:
Qmax＝f×cop×U×Imax
wherein, 1.1 > f > 0.9, cop is the heat pump heat exchange efficiency corresponding to the current actual temperature outside the vehicle and the current air quantity of the blower, imax is the maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle, and U is the current voltage of the electric compressor.
In some embodiments, when the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to perform heating, and the difference between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to perform heating, the method further comprises: and adjusting the actual heating power of the PTC in real time according to the actual heating power of the heat pump system so that the sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power.
In some embodiments, the actual heating power Qnc, qnc= (NC/NCmam) ×qmax of the heat pump system is calculated from the current rotation speed NC of the motor-driven compressor 13, NCmam being the maximum rotation speed corresponding to Imax. When the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to perform heating, since the rotation speed of the electric compressor 13 is gradually increased from the current rotation speed to NCmax, in this embodiment, the actual heating power of the PTC is adjusted in real time, so that the sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power, so as to accelerate the heating rate and improve the user experience.
For the foregoing method embodiments, for simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will appreciate that the present invention is not limited by the order of acts, as some steps may, in accordance with the present invention, occur in other orders or concurrently.
The following are examples of the apparatus of the present invention that may be used to perform the method embodiments of the present invention. For details not disclosed in the embodiments of the apparatus of the present invention, please refer to the embodiments of the method of the present invention.
Referring to fig. 3, a heating energy distribution device of a heat pump air conditioner provided in this embodiment includes: a total heating power unit 31, a heat pump maximum heating power unit 32, a first heating processing unit 33, and a second heating processing unit 34.
And the total heating power unit 31 is used for calculating the total heating power required to be generated by the heat pump air conditioner.
The heat pump maximum heating power unit 32 is configured to calculate the maximum heating power currently available in the heat pump system of the heat pump air conditioner.
The first heating processing unit 33 is configured to control the heat pump system to perform heating by using the total heating power as a target heating power of the heat pump system when the total heating power is not greater than the maximum heating power.
And a second heating processing unit 34, configured to control the heat pump system to perform heating by using the maximum heating power as a target heating power of the heat pump system when the total heating power is greater than the maximum heating power, and control the PTC to perform heating by using a difference between the total heating power and the maximum heating power as the target heating power of the PTC of the heat pump air conditioner.
In some embodiments, the total heating power unit 31 is specifically configured to calculate the total heating power that needs to be generated by the heat pump air conditioner according to the total heating power formula. The formula of the total heating power is as follows:
TGQ＝1.16×Cpa×Ga×γa×N×(TCO-Te)
wherein TGQ is total heating power, cpa is specific heat capacity of air, ga is blower air volume of the heat pump air conditioner, gamma a is density of air, N is opening degree of a temperature air door of the heat pump air conditioner, TCO is air outlet target temperature of the heat pump air conditioner, and Te is actual temperature of an evaporator of the heat pump air conditioner.
In some embodiments, the heat pump maximum heating power unit 32 specifically includes: maximum current subunit, heat pump heat exchange efficiency subunit and heat pump maximum heating power subunit.
And the maximum current subunit is used for matching the preset corresponding relation between the external temperature of the vehicle and the maximum current of the electric compressor to obtain the maximum current of the electric compressor corresponding to the current actual temperature of the external vehicle.
The heat pump heat exchange efficiency subunit is used for obtaining the heat pump heat exchange efficiency corresponding to the current actual temperature outside the vehicle and the current air quantity of the air blower by matching by utilizing the preset corresponding relation between the temperature outside the vehicle and the air quantity of the air blower and the heat pump heat exchange efficiency.
And the heat pump maximum heating power subunit is used for calculating the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner currently according to the heat pump maximum power formula. The maximum power formula of the heat pump is as follows:
Qmax＝f×cop×U×Imax
wherein, 1.1 > f > 0.9, cop is the heat pump heat exchange efficiency corresponding to the current actual temperature outside the vehicle and the current air quantity of the blower, imax is the maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle, and U is the current voltage of the electric compressor.
In some embodiments, the second heating processing unit 34 is further configured to, when taking the maximum heating power as the target heating power of the heat pump system to control the heat pump system to perform heating, and taking the difference between the total heating power and the maximum heating power as the target heating power of the PTC of the heat pump air conditioner to control the PTC to perform heating, adjust the actual heating power of the PTC in real time according to the actual heating power of the heat pump system, so that the sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power.
Referring to fig. 4, a schematic diagram of a heat pump air conditioner controller is provided for an embodiment. The hardware structure of the heat pump air conditioner controller may include: at least one processor 41, at least one communication interface 42, at least one memory 43 and at least one communication bus 44, and the processor 41, the communication interface 42, the memory 43 complete the communication with each other through the communication bus 44;
processor 41 may be a CPU (CentralProcessing Unit ) or ASIC (Application Specific Integrated Circuit, application specific integrated circuit) in some embodiments, or one or more integrated circuits configured to implement embodiments of the present invention, etc.
Communication interface 42 may include a standard wired interface, a wireless interface. Are commonly used to establish a communication link between a heat pump air conditioner controller and other electronic devices or systems.
The memory 43 includes at least one type of readable storage medium. The readable storage medium may be an NVM (non-volatile memory) such as flash memory, hard disk, multimedia card, card memory, etc. The readable storage medium may also be a high speed RAM (randomaccess memory ) memory. The readable storage medium may in some embodiments be an internal storage unit of a heat pump air conditioner controller, such as a hard disk of the heat pump air conditioner controller. In other embodiments, the readable storage medium may also be an external storage device of the heat pump air conditioner controller, for example, a plug-in hard disk, SMC (Smart Media Card), SD (Secure Digital) Card, flash Card (Flash Card) or the like, which are provided on the heat pump air conditioner controller.
Wherein the memory 43 stores a computer program, the processor 41 may call the computer program stored in the memory 43, the computer program being for:
calculating to obtain the total heating power required to be generated by the heat pump air conditioner;
calculating to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present;
when the total heating power is not greater than the maximum heating power, controlling the heat pump system to heat by taking the total heating power as the target heating power of the heat pump system;
when the total heating power is larger than the maximum heating power, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the difference value between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat.
The refinement and expansion functions of the program may be described with reference to the above.
Fig. 4 shows only a heat pump air conditioner controller having components 41-44, but it should be understood that not all of the illustrated components need be implemented, and that more or fewer components may alternatively be implemented.
The embodiment of the present invention also provides a readable storage medium storing a program adapted to be executed by a processor, the program being configured to:
calculating to obtain the total heating power required to be generated by the heat pump air conditioner;
calculating to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present;
when the total heating power is not greater than the maximum heating power, controlling the heat pump system to heat by taking the total heating power as the target heating power of the heat pump system;
when the total heating power is larger than the maximum heating power, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the difference value between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat.
The refinement and expansion functions of the program may be described with reference to the above.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, all embodiments are mainly described in the differences from other embodiments, and the same similar parts between the embodiments are referred to each other, and features described in the embodiments may be replaced or combined with each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A heating energy distribution method of a heat pump air conditioner, comprising:
calculating to obtain the total heating power required to be generated by the heat pump air conditioner;
calculating to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present;
when the total heating power is not greater than the maximum heating power, controlling the heat pump system to heat by taking the total heating power as the target heating power of the heat pump system;
when the total heating power is larger than the maximum heating power, the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat, and the difference value between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to control the PTC to heat;
the calculating to obtain the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present specifically comprises the following steps:
matching to obtain the maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle by utilizing the preset corresponding relation between the temperature outside the vehicle and the maximum current of the electric compressor;
matching the preset corresponding relation between the outside temperature, the air quantity of the air blower and the heat exchange efficiency of the heat pump to obtain the heat exchange efficiency of the heat pump corresponding to the current outside actual temperature and the air quantity of the air blower;
the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present is obtained through calculation according to a maximum power formula of the heat pump, wherein the maximum power formula of the heat pump is Qmax=f×cop×U×Imax, wherein 1.1 > f > 0.9, cop is heat exchange efficiency of the heat pump corresponding to the current actual temperature outside the vehicle and the current air quantity of the air blower, imax is maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle, and U is current voltage of the electric compressor.
2. The method for distributing heating energy of a heat pump air conditioner according to claim 1, wherein the calculating obtains total heating power required to be generated by the heat pump air conditioner, specifically comprising:
the total heating power required to be generated by the heat pump air conditioner is calculated according to a total heating power formula, wherein the total heating power formula is as follows:
TGQ＝1.16×Cpa×Ga×γa×N×(TCO-Te)
wherein TGQ is total heating power, cpa is specific heat capacity of air, ga is blower air volume of the heat pump air conditioner, gamma a is density of air, N is opening degree of a temperature air door of the heat pump air conditioner, TCO is air outlet target temperature of the heat pump air conditioner, and Te is actual temperature of an evaporator of the heat pump air conditioner.
3. The heating energy distribution method of a heat pump air conditioner according to claim 1, wherein when the maximum heating power is used as a target heating power of the heat pump system to control the heat pump system to perform heating, and a difference between the total heating power and the maximum heating power is used as a target heating power of a PTC of the heat pump air conditioner to control the PTC to perform heating, further comprising:
and adjusting the actual heating power of the PTC in real time according to the actual heating power of the heat pump system so that the sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power.
4. A heating energy distribution device of a heat pump air conditioner, comprising:
the total heating power unit is used for calculating the total heating power required to be generated by the heat pump air conditioner;
the heat pump maximum heating power unit is used for calculating and obtaining the maximum heating power which can be provided by the heat pump system of the heat pump air conditioner at present;
a first heating processing unit, configured to control the heat pump system to perform heating by using the total heating power as a target heating power of the heat pump system when the total heating power is not greater than the maximum heating power;
a second heating processing unit, configured to control the heat pump system to perform heating by using the maximum heating power as a target heating power of the heat pump system when the total heating power is greater than the maximum heating power, and control the PTC of the heat pump air conditioner to perform heating by using a difference between the total heating power and the maximum heating power as a target heating power of the PTC;
the maximum heating power unit of the heat pump specifically comprises:
the maximum current subunit is used for matching the preset corresponding relation between the outside temperature and the maximum current of the electric compressor to obtain the maximum current of the electric compressor corresponding to the actual outside temperature;
the heat pump heat exchange efficiency subunit is used for obtaining the heat pump heat exchange efficiency corresponding to the current actual temperature outside the vehicle and the current air quantity of the air blower by matching by utilizing the preset corresponding relation between the temperature outside the vehicle and the air quantity of the air blower and the heat pump heat exchange efficiency;
the heat pump maximum heating power subunit is configured to calculate, according to a heat pump maximum power formula, a maximum heating power that can be provided by a heat pump system of the heat pump air conditioner at present, where the heat pump maximum power formula is qmax=f×cop×u×imax, where 1.1 > f > 0.9, cop is a heat pump heat exchange efficiency corresponding to a current actual temperature outside the vehicle and a current blower air volume, imax is a maximum current of the electric compressor corresponding to the current actual temperature outside the vehicle, and U is a current voltage of the electric compressor.
5. The heating energy distribution device of a heat pump air conditioner according to claim 4, wherein the total heating power unit is specifically configured to:
the total heating power required to be generated by the heat pump air conditioner is calculated according to a total heating power formula, wherein the total heating power formula is as follows:
TGQ＝1.16×Cpa×Ga×γa×N×(TCO-Te)
wherein TGQ is total heating power, cpa is specific heat capacity of air, ga is blower air volume of the heat pump air conditioner, gamma a is density of air, N is opening degree of a temperature air door of the heat pump air conditioner, TCO is air outlet target temperature of the heat pump air conditioner, and Te is actual temperature of an evaporator of the heat pump air conditioner.
6. The heating energy distribution device of the heat pump air conditioner according to claim 4, wherein the second heating processing unit is further configured to adjust the actual heating power of the PTC in real time according to the actual heating power of the heat pump system so that the sum of the actual heating power of the heat pump system and the actual heating power of the PTC is equal to the total heating power when the maximum heating power is used as the target heating power of the heat pump system to control the heat pump system to heat and the difference between the total heating power and the maximum heating power is used as the target heating power of the PTC of the heat pump air conditioner to heat.
7. A readable storage medium having a program stored thereon, wherein the program, when executed by a processor, realizes the respective steps of the heating energy distribution method of the heat pump air conditioner according to any one of claims 1 to 3.
8. The heat pump air conditioner comprises a heat pump air conditioner controller, and an evaporator temperature sensor, an electric compressor, an off-vehicle temperature sensor, a PTC (positive temperature coefficient), a blower and a temperature air door opening sensor which are respectively in communication connection with the heat pump air conditioner controller, wherein the heat pump air conditioner controller comprises a memory and a processor, and is characterized in that the memory is used for storing a program;
the processor is configured to execute the program to implement the respective steps of the heating energy distribution method of the heat pump air conditioner according to any one of claims 1 to 3.
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