Heat exchanger defrosting method, controller, heat pump system and automobile

Abstract

The invention discloses a heat exchanger defrosting method, a controller, a heat pump system and an automobile, and relates to the technical field of heat exchanger defrosting, and the disclosed heat exchanger defrosting method comprises the steps that when a target demand signal is received, whether the continuous receiving duration of the target demand signal reaches the preset timing duration or not is judged; if yes, the current defrosting efficiency is determined, and whether the current defrosting efficiency meets the preset defrosting efficiency or not is judged; and when the defrosting efficiency reaches the preset defrosting efficiency, the heat exchanger is defrosted. Compared with the prior art, the defrosting requirement is received according to the real-time condition of the vehicle, the defrosting efficiency is judged, the heat exchanger is defrosted, the defrosting efficiency is higher than that of a traditional method, and the heat pump system and the heat exchanger of the vehicle are protected.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchanger defrosting, and in particular to a heat exchanger defrosting method, a controller, a heat pump system and a car. Background Art

[0002] At present, the automobile industry is facing many challenges such as energy shortage and environmental pollution, and the automobile industry is undergoing an "electrification" transformation. Pure electric vehicles with zero emission characteristics are widely welcomed by the market and are also the focus of current new energy vehicle research. However, the large-scale promotion of pure electric vehicles faces the big problem of short driving range. Therefore, the rational use of electric vehicle energy can effectively extend the driving range, and the heat pump system can effectively save energy consumption. Therefore, frosting of outdoor heat exchangers has always been a major problem restricting the development of heat pumps.

[0003] Traditional heat exchanger defrosting solutions can easily clog the evaporator when the heat exchanger is frosted, causing the air flow to drop and the heat exchange efficiency to decrease, thereby reducing the heating capacity and operating efficiency of the heat pump. Therefore, traditional heat exchanger defrosting solutions are inefficient and can easily damage the heat pump system and the heat exchanger.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a heat exchanger defrosting method, a controller, a heat pump system and a car, aiming to solve the technical problems of low defrosting efficiency and easy damage to the heat pump system and the heat exchanger.

[0006] To achieve the above object, the present invention provides a heat exchanger defrosting method, the method comprising:

[0007] When receiving the target demand signal, determining whether the continuous reception time of the target demand signal reaches a preset timing time;

[0008] If yes, determine the current defrost efficiency, and judge whether the current defrost efficiency meets the preset defrost efficiency;

[0009] When the defrosting efficiency reaches the preset defrosting efficiency, the heat exchanger is defrosted by the heat exchanger defrosting circuit.

[0010] In one embodiment, the target demand signal includes: a battery pack no cooling request signal, a passenger compartment no cooling request signal, and a temperature difference signal;

[0011] The step of determining whether the target demand signal continuous reception duration reaches a preset timing duration comprises:

[0012] Determine whether the continuous reception time of the received battery pack no cooling request signal, the passenger compartment no cooling request signal and the temperature difference signal all reaches the preset timing time.

[0013] In one embodiment, before the step of determining the current defrost efficiency and judging whether the current defrost efficiency meets the preset defrost efficiency, the method includes:

[0014] Obtain the heat exchanger defrost demand instruction;

[0015] According to the defrost demand instruction, detecting whether the working state of the working device reaches a preset working state;

[0016] When the working state reaches a preset working state, it is determined that the heat exchanger meets the defrosting requirement.

[0017] In one embodiment, if yes, the step of determining the current defrost efficiency and judging whether the current defrost efficiency meets the preset defrost efficiency includes:

[0018] Detect whether the electric drive no heat dissipation request signal is received, detect the water temperature at the battery pack outlet, and obtain the current real-time vehicle speed;

[0019] When the request signal is received, it is detected that the water temperature at the water outlet of the battery pack is greater than the preset water temperature and the vehicle speed is less than the preset vehicle speed, it is determined that the defrost efficiency meets the preset defrost efficiency.

[0020] In one embodiment, when the defrost efficiency reaches the preset defrost efficiency, the step of defrosting the heat exchanger through the heat exchanger defrost circuit comprises:

[0021] When it is detected that the defrosting efficiency reaches the preset defrosting efficiency, the heat exchanger is defrosted through the heat exchanger defrosting circuit, and when the defrosting of the heat exchanger is completed, the frost degree of the heat exchanger is detected.

[0022] In one embodiment, the heat exchanger defrost circuit includes: a motor water pump circuit, a battery water pump circuit, a heater water pump circuit and a heat exchange circuit;

[0023] The step of defrosting the heat exchanger by means of the heat exchanger defrosting circuit comprises:

[0024] The motor water pump circuit, the battery water pump circuit and the heater water pump circuit respectively exchange heat with the heat exchange circuit;

[0025] The heat exchanger is defrosted through the heat exchange circuit after the heat exchange.

[0026] In addition, to achieve the above objectives, the present invention also proposes a controller, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the heat exchanger defrosting method as described above.

[0027] The present invention also provides a heat pump system, which includes the controller.

[0028] In addition, to achieve the above object, the present invention also proposes a heat pump system, the heat pump system comprising:

[0029] Motor water pump circuit, battery water pump circuit, heater water pump circuit and heat exchange circuit;

[0030] The controller is respectively connected to the motor water pump circuit, the battery water pump circuit, the heater water pump circuit and the heat exchange circuit;

[0031] The heat exchange circuit is respectively connected to the heat exchanger, the motor water pump circuit, the battery water pump circuit and the heater water pump circuit.

[0032] The present invention also provides a car, comprising the controller and the heat pump system.

[0033] One or more technical solutions proposed in the present invention have at least the following technical effects:

[0034] The present invention determines whether the target demand signal has been continuously received for a preset time period when receiving the target demand signal; if so, determines the current defrost efficiency and determines whether the current defrost efficiency meets the preset defrost efficiency; when the defrost efficiency reaches the preset defrost efficiency, defrosts the heat exchanger. Compared with the prior art, the present invention receives the defrost demand based on the real-time situation of the vehicle and determines the defrost efficiency to achieve defrosting of the heat exchanger, which has higher defrosting efficiency than the traditional one and protects the heat pump system and the heat exchanger of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Figure 1It is a structural diagram of working components of a heat pump system in a heat exchanger defrosting method of the present invention;

[0038] Figure 2 A schematic diagram of a process flow diagram provided for a first embodiment of a heat exchanger defrosting method according to the present invention;

[0039] Figure 3 A schematic diagram of a process flow provided for a second embodiment of a heat exchanger defrosting method of the present invention;

[0040] Figure 4 A schematic diagram of a process flow provided for a third embodiment of a heat exchanger defrosting method according to the present invention;

[0041] Figure 5 This is a schematic diagram of the module structure of a heat pump system according to an embodiment of the present invention;

[0042] Figure 6 It is a schematic diagram of the equipment structure of the hardware operating environment involved in the heat exchanger defrosting method in an embodiment of the present invention.

[0043] Description of Figure Numbers:

[0044] Label name Label name 1 Controller 2 Motor water pump circuit 3 Battery water pump circuit 4 Heater water pump circuit 5 Heat exchange circuit 6 Heat Exchanger

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present invention and are not used to limit the present invention.

[0047] In order to better understand the technical solution of the present invention, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0048] The main solutions of the embodiments of the present invention are:

[0049] In this embodiment, for the convenience of description, the following description is made with the identification controller as the execution subject.

[0050] Since the existing technology easily blocks the evaporator when the heat exchanger is frosted, the air flow rate decreases and the heat exchange efficiency decreases, thereby reducing the heating capacity and operating efficiency of the heat pump. Therefore, the traditional heat exchanger defrosting solution is inefficient and easily damages the heat pump system and the heat exchanger.

[0051] The present invention provides a solution, by determining whether the target demand signal is continuously received for a preset time period when receiving the target demand signal; if so, determining the current defrost efficiency and determining whether the current defrost efficiency meets the preset defrost efficiency; when the defrost efficiency reaches the preset defrost efficiency, the heat exchanger is defrosted. Compared with the prior art, the present invention receives the defrost demand based on the real-time situation of the vehicle and determines the defrost efficiency to achieve defrosting of the heat exchanger, which has higher defrosting efficiency than the traditional one and protects the heat pump system and the heat exchanger of the vehicle.

[0052] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a heat pump system, etc. The following takes the controller as an example to illustrate this embodiment and the following embodiments.

[0053] Based on this, an embodiment of the present invention provides a heat exchanger defrosting method, referring to Figure 1 as well as Figure 2 , Figure 1 This is a structural diagram of the working components of the heat pump system in the heat exchanger defrosting method of the present invention. Figure 2 It is a schematic flow chart of the first embodiment of the heat exchanger defrosting method of the present invention.

[0054] In this embodiment, the heat exchanger defrosting method includes steps S10 to S30:

[0055] Step S10, when receiving the target demand signal, determining whether the continuous reception time of the target demand signal reaches a preset timing time.

[0056] It should be noted that the above target demand signal may be a battery pack no cooling request signal, a passenger compartment no cooling request signal, a temperature difference signal, etc.;

[0057] It should be noted that the above-mentioned preset timing duration can be 5S or 10S and can be calibrated.

[0058] It is understandable that in different heat pump systems, the target demand signal and the preset timing duration are uniformly distributed, and this embodiment does not limit this.

[0059] In a specific implementation, when other modules of the vehicle computer detect that the heat exchanger of the vehicle needs to be defrosted, the target demand signal will be sent to the heat pump system. When the controller in the heat pump system receives the target demand signal, it determines whether the continuous reception time of the target demand signal reaches the preset timing time. If so, it is determined that the heat exchanger needs to be defrosted. If not, it is determined that the heat exchanger does not need to be defrosted.

[0060] Step S20: If yes, determine the current defrost efficiency and judge whether the current defrost efficiency meets the preset defrost efficiency.

[0061] It should be noted that the above-mentioned defrosting efficiency refers to the ability or speed of the heat exchanger to remove the frost layer per unit time during the defrosting process;

[0062] It should be noted that the above-mentioned preset defrost efficiency can be 70% or 80%, and can be calibrated.

[0063] It is understandable that in different heat pump systems, the above-mentioned defrost efficiency and the above-mentioned preset defrost efficiency are different, and this embodiment does not limit this.

[0064] In a specific implementation, when it is determined that the above-mentioned heat exchanger has a need for defrosting, the above-mentioned defrost efficiency of the vehicle is determined by detecting whether an electric drive non-heat dissipation request signal is received, detecting the water temperature at the water outlet of the battery pack, and obtaining the current real-time vehicle speed, etc., and comparing and judging the above-mentioned defrost efficiency with the above-mentioned preset defrost efficiency.

[0065] Step S30: When the defrost efficiency reaches the preset defrost efficiency, the heat exchanger is defrosted through the heat exchanger defrost circuit.

[0066] It is understandable that the above-mentioned heat exchanger defrost circuit includes: a motor water pump circuit, a battery water pump circuit, a warm air water pump circuit and a heat exchange circuit. Among them, the above-mentioned motor water pump circuit includes: an active air intake grille, an MCU chip, an on-board charger, an on-board DC / DC converter, a three-way valve, a four-way valve and a motor water pump. The above-mentioned battery water pump circuit includes: a battery water pump, a temperature sensor and a battery pack. The above-mentioned warm air water pump circuit includes: a high-pressure water heater (PTC), a proportional three-way valve, a water condenser and a warm air water pump. The above-mentioned heat exchange circuit includes: a full-pass electronic expansion valve, an electronic expansion valve, a chiller-side electronic expansion valve, a rear air-conditioning electronic expansion valve, a fan and a water condenser.

[0067] In a specific implementation, when the above-mentioned defrosting efficiency is detected to reach the above-mentioned preset defrosting efficiency, the three-way valve goes to 2 and 3, the four-way valve goes to 1, 2 and 3, 4, the battery water pump does not work, the motor water pump works, the PTC does not work, the full-pass electronic expansion valve works (fixed opening), the electronic expansion valve is closed, the chiller side electronic expansion valve works (adjusted according to the subcooling degree before the valve), the compressor works, and the high-pressure water heater does not work. The above-mentioned heat exchanger is defrosted by the waste heat generated by the above-mentioned motor water pump circuit and the above-mentioned warm air water pump circuit.

[0068] This embodiment provides a heat exchanger defrosting method, which determines whether the target demand signal has been continuously received for a preset time period when a target demand signal is received; if so, determines the current defrosting efficiency and determines whether the current defrosting efficiency meets the preset defrosting efficiency; when the defrosting efficiency reaches the preset defrosting efficiency, defrosts the heat exchanger. Compared with the prior art, the present invention receives the defrosting demand based on the real-time situation of the vehicle and determines the defrosting efficiency to achieve defrosting of the heat exchanger, which has higher defrosting efficiency than the traditional one and protects the heat pump system and the heat exchanger of the vehicle.

[0069] In this embodiment, the step S10 includes step S101:

[0070] Step S101, determining whether the continuous reception time of the received battery pack no cooling request signal, the passenger compartment no cooling request signal and the temperature difference signal all reaches a preset timing time.

[0071] It should be noted that the above-mentioned battery pack no cooling request signal is a signal that feedback indicates that the temperature of the battery pack is within a normal range or that the heat dissipation system of the battery pack can handle the current heat by itself;

[0072] It should be noted that the above-mentioned passenger cabin no cooling request signal is a signal that feedback indicates that the temperature of the passenger cabin is appropriate or that the air conditioning system of the passenger cabin can adjust itself to a comfortable temperature;

[0073] It should be noted that the above-mentioned temperature difference signal is a signal that is fed back when the saturation temperature corresponding to the ambient temperature minus the compressor low pressure is greater than a preset temperature value, and the above-mentioned preset temperature value can be calibrated.

[0074] It is understandable that in different heat pump systems, the battery pack no cooling request signal, the passenger compartment no cooling request signal and the temperature difference signal are all different, and this embodiment does not impose any limitation on this.

[0075] In a specific implementation, it is determined whether the continuous reception time of the received battery pack no cooling request signal, the passenger compartment no cooling request signal and the temperature difference signal all reaches the preset timing time. If so, it is determined that the heat exchanger has a defrost requirement. If not, it is determined that the heat exchanger has no defrost requirement.

[0076] Based on the first embodiment of the present invention, in the second embodiment of the present invention, the same or similar contents as those in the first embodiment can refer to the above introduction, and will not be repeated in the following. Figure 3 , Figure 3 A schematic diagram of a process flow diagram of a second embodiment of a heat exchanger defrosting method according to the present invention.

[0077] In this embodiment, the step S20 includes steps S201 to S203:

[0078] Step S201, obtaining a heat exchanger defrost requirement instruction.

[0079] It should be noted that the above-mentioned heat exchanger defrost requirement instruction is an instruction issued by the vehicle computer when it detects that the heat exchanger needs to be defrosted.

[0080] In a specific implementation, when the vehicle detects that the heat exchanger needs to be defrosted, a defrost requirement instruction for the heat exchanger will be sent to the heat pump system.

[0081] Step S202: According to the defrost demand instruction, detecting whether the working state of the working component reaches a preset working state.

[0082] It should be noted that the above-mentioned working devices are the components in the above-mentioned heat pump system that participate in the defrosting of the heat exchanger;

[0083] It should be noted that the above working status is the real-time status of each working device;

[0084] It should be noted that the above-mentioned preset working state is the normal working state when each working component normally enters the heat exchanger defrost mode.

[0085] In a specific implementation, according to the above-mentioned defrost demand instruction, the above-mentioned working state of the above-mentioned working device is detected, and it is determined whether the preset working state is reached. For example, it is detected whether the motor water pump is normal, and whether the full-pass electronic expansion valve, electronic expansion valve, chiller-side electronic expansion valve and rear air-conditioning electronic expansion valve are fault-free.

[0086] Step S203: when the working state reaches a preset working state, it is determined that the heat exchanger meets the defrosting requirement.

[0087] In a specific implementation, when it is detected that the working states of the above-mentioned working components have reached the above-mentioned preset working states, it is determined that the above-mentioned heat exchanger meets the defrosting requirement.

[0088] Based on the second embodiment of the present invention, in the third embodiment of the present invention, the same or similar contents as those in the second embodiment can be referred to the above introduction, and will not be described in detail later. Figure 4 , Figure 4 A schematic diagram of a process flow diagram of a heat exchanger defrosting method according to a third embodiment of the present invention.

[0089] In this embodiment, the step S20 includes steps S204 to S205:

[0090] Step S204, detecting whether an electric drive non-heat dissipation request signal is received, detecting the water temperature at the battery pack water outlet, and obtaining the current real-time vehicle speed.

[0091] It should be noted that the above-mentioned electric drive no heat dissipation request signal refers to a signal that the motor does not need heat dissipation request;

[0092] It should be noted that the water temperature at the water outlet of the battery pack can be used to observe the temperature of the battery pack;

[0093] It should be noted that the above-mentioned real-time vehicle speed is the current real-time speed of the vehicle.

[0094] In a specific implementation, it is detected whether the electric drive non-heat dissipation request signal is received, the water temperature of the battery pack water outlet is detected, and the current real-time vehicle speed is obtained.

[0095] Step S205, when the request signal is received, it is detected that the water temperature at the water outlet of the battery pack is greater than the preset water temperature and the vehicle speed is less than the preset vehicle speed, it is determined that the defrost efficiency meets the preset defrost efficiency.

[0096] It should be noted that the above-mentioned preset water temperature and the above-mentioned preset vehicle speed can be calibrated, and this embodiment does not impose any limitation on this.

[0097] In a specific implementation, when the request signal is received, the water temperature at the water outlet of the battery pack is detected to be greater than the preset water temperature, and the vehicle speed is less than the preset vehicle speed, it is determined that the defrosting efficiency meets the preset defrosting efficiency. If the electric drive has a heat dissipation request, the electric drive heat dissipation is preferentially satisfied, and the heat exchanger is not defrosted. If the water temperature at the water outlet of the battery pack is less than the preset water temperature, it can be considered that the ambient temperature is too low, that is, the defrosting efficiency of the heat pump system is also low, and PTC heating can be directly performed. If the real-time vehicle speed is greater than the preset vehicle speed, the defrosting efficiency of the heat pump system is low, and the heat exchanger is not defrosted.

[0098] In this embodiment, the step S30 includes step S301:

[0099] Step S301, when it is detected that the defrost efficiency reaches the preset defrost efficiency, the heat exchanger is defrosted through the heat exchanger defrost circuit, and when the defrost of the heat exchanger is completed, the frost degree of the heat exchanger is detected.

[0100] It should be noted that the above-mentioned frost degree of the heat exchanger is a comprehensive expression of parameters such as the thickness, density and coverage of the frost layer on the surface of the heat exchanger.

[0101] In a specific implementation, when it is detected that the defrost efficiency reaches the preset defrost efficiency, the heat exchanger is defrosted through the heat exchanger defrost circuit, and when the defrost of the heat exchanger is completed, the frost degree of the heat exchanger is detected.

[0102] refer to Figure 5 , Figure 5 Schematic diagram of the module structure of the heat pump system according to an embodiment of the present invention.

[0103] In this embodiment, the step S30 includes steps S302 to S303:

[0104] Step S302 , heat exchange is performed between the motor water pump circuit 2 , the battery water pump circuit 3 , and the heater water pump circuit 4 and the heat exchange circuit 5 , respectively.

[0105] Step S303, defrosting the heat exchanger 6 through the heat exchange circuit 5 after the heat exchange.

[0106] In a specific implementation, the motor water pump circuit 2 , the battery water pump circuit 3 , and the heater water pump circuit 4 are heat exchanged with the heat exchange circuit 5 , respectively, and the heat exchanger 6 is defrosted by the heat exchange circuit 5 after the heat exchange.

[0107] It should be noted that the above examples are only used to understand the present invention and do not constitute a limitation on the heat exchanger defrosting method of the present invention. More simple transformations based on this technical concept are all within the protection scope of the present invention.

[0108] The present invention provides a controller, the controller device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the heat exchanger defrosting method in the above-mentioned embodiment one.

[0109] Reference below Figure 6 , which shows a schematic diagram of the structure of a controller suitable for implementing an embodiment of the present invention. The controller in the embodiment of the present invention may include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The controller shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0110] like Figure 6As shown, the controller may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which may perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the heat exchanger defrosting device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems may be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the controller to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a controller with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0111] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present invention are executed.

[0112] The controller provided by the present invention adopts the heat exchanger defrosting method in the above embodiment, which can solve the technical problem of heat exchanger defrosting. Compared with the prior art, the beneficial effects of the controller provided by the present invention are the same as the beneficial effects of the heat exchanger defrosting method provided by the above embodiment, and other technical features in the controller are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0113] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0114] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0115] The present invention provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the heat exchanger defrosting method in the above-mentioned embodiment.

[0116] The computer-readable storage medium provided by the present invention may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0117] The computer-readable storage medium may be included in the heat exchanger defrosting device; or may exist independently without being assembled into the heat exchanger defrosting device.

[0118] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the heat exchanger defrost device, the heat exchanger defrost device: when receiving the target demand signal, determines whether the continuous reception time of the target demand signal reaches the preset timing time; if so, determines the current defrost efficiency, and determines whether the current defrost efficiency meets the preset defrost efficiency; when the defrost efficiency reaches the preset defrost efficiency, defrosts the heat exchanger through the heat exchanger defrost circuit.

[0119] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0120] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0121] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of the module does not limit the unit itself in some cases.

[0122] The readable storage medium provided by the present invention is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned heat exchanger defrosting method, and can solve the technical problem of heat exchanger defrosting. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as the beneficial effects of the heat exchanger defrosting method provided by the above-mentioned embodiment, and will not be repeated here.

[0123] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the heat exchanger defrosting method as described above are implemented.

[0124] The computer program product provided by the present invention can solve the technical problem of heat exchanger defrosting. Compared with the prior art, the beneficial effects of the computer program product provided by the present invention are the same as the beneficial effects of the heat exchanger defrosting method provided by the above embodiment, which will not be repeated here.

[0125] The present invention also provides a heat pump system, which includes the above controller.

[0126] The present invention further provides a heat pump system, the heat pump system further comprising:

[0127] Motor water pump circuit 2, battery water pump circuit 3, heater water pump circuit 4 and heat exchange circuit 5;

[0128] The controller 1 is respectively connected to the motor water pump circuit 2, the battery water pump circuit 3, the heater water pump circuit 4 and the heat exchange circuit 5;

[0129] The heat exchange circuit 5 is connected to the heat exchanger 6 , the motor water pump circuit 2 , the battery water pump circuit 3 and the heater water pump circuit 4 respectively.

[0130] The present invention also provides a car, comprising the heat exchanger and the heat pump system.

[0131] The above descriptions are only some embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A heat exchanger defrosting method, characterized in that: The heat exchanger defrosting method is applied to a controller in a heat pump system, the controller is connected to a heat exchanger defrosting circuit in the heat pump system, and the heat exchanger defrosting method comprises: When receiving the target demand signal, determining whether the continuous reception time of the target demand signal reaches a preset timing time; If yes, determine the current defrost efficiency, and judge whether the current defrost efficiency meets the preset defrost efficiency; When the defrosting efficiency reaches the preset defrosting efficiency, the heat exchanger is defrosted by the heat exchanger defrosting circuit.

2. The heat exchanger defrosting method according to claim 1, characterized in that: The target demand signal includes: a battery pack no cooling request signal, a passenger compartment no cooling request signal, and a temperature difference signal; The step of determining whether the target demand signal continuous reception duration reaches a preset timing duration comprises: Determine whether the continuous reception time of the received battery pack no cooling request signal, the passenger compartment no cooling request signal and the temperature difference signal all reaches the preset timing time.

3. The heat exchanger defrosting method according to claim 2, characterized in that: If so, before the step of determining the current defrost efficiency and judging whether the current defrost efficiency meets the preset defrost efficiency, the method includes: Obtain the heat exchanger defrost demand instruction; According to the defrost demand instruction, detecting whether the working state of the working device reaches a preset working state; When the working state reaches a preset working state, it is determined that the heat exchanger meets the defrosting requirement.

4. The heat exchanger defrosting method according to claim 3, characterized in that: If so, the step of determining the current defrost efficiency and judging whether the current defrost efficiency meets the preset defrost efficiency includes: Detect whether the electric drive no heat dissipation request signal is received, detect the water temperature at the battery pack outlet, and obtain the current real-time vehicle speed; When the request signal is received, it is detected that the water temperature at the water outlet of the battery pack is greater than the preset water temperature and the vehicle speed is less than the preset vehicle speed, it is determined that the defrost efficiency meets the preset defrost efficiency.

5. The heat exchanger defrosting method according to claim 4, characterized in that: When the defrosting efficiency reaches the preset defrosting efficiency, the step of defrosting the heat exchanger through the heat exchanger defrosting circuit comprises: When it is detected that the defrosting efficiency reaches the preset defrosting efficiency, the heat exchanger is defrosted through the heat exchanger defrosting circuit, and when the defrosting of the heat exchanger is completed, the frost degree of the heat exchanger is detected.

6. The heat exchanger defrosting method according to any one of claims 1 to 5, characterized in that: The heat exchanger defrosting circuit includes: a motor water pump circuit, a battery water pump circuit, a warm air water pump circuit and a heat exchange circuit; The step of defrosting the heat exchanger by means of the heat exchanger defrosting circuit comprises: The motor water pump circuit, the battery water pump circuit and the heater water pump circuit respectively exchange heat with the heat exchange circuit; The heat exchanger is defrosted through the heat exchange circuit after the heat exchange.

7. A controller, characterized in that: The controller comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the heat exchanger defrosting method according to any one of claims 1 to 6.

8. A heat pump system, characterized in that: The heat pump system comprises the controller according to claim 7.

9. The heat pump system according to claim 8, characterized in that: The heat pump system further comprises: Motor water pump circuit, battery water pump circuit, heater water pump circuit and heat exchange circuit; The controller is respectively connected to the motor water pump circuit, the battery water pump circuit, the heater water pump circuit and the heat exchange circuit; The heat exchange circuit is respectively connected to the heat exchanger, the motor water pump circuit, the battery water pump circuit and the heater water pump circuit.

10. An automobile, characterized in that: The vehicle comprises a heat exchanger and a heat pump system as claimed in claim 8 or 9.

Images