Power control method and device for PHEV type water heating heater, terminal and storage medium

Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a PHEV type water heating heater power control method and device, a terminal and a storage medium. Comprising the steps of 1, judging the battery heating grade; 2, formulating a water heating heater strategy according to the battery heating grade passenger compartment heating requirement and the whole vehicle charging and discharging state; by judging the vehicle charging heating state, the battery core body state and the like, the battery heating grade is evaluated, reasonable control over the power of the water heating heater is achieved, combustion heat of an engine is fully utilized, energy consumption of the whole vehicle is reduced, and the heating requirements of a driver and passengers are met.

Description

Technical Field

[0001] The present invention belongs to the field of automobile technology, and in particular to a method, device, terminal and storage medium for controlling the power of a water heater of a PHEV vehicle. Background Art

[0002] New energy pure electric vehicles often use water heaters to achieve passenger compartment heating and power battery heating in low temperature environments. Plug-in hybrid vehicles use engines and range extenders as drive systems, so they have two heat sources, one is engine combustion heat, and the other is water heaters. Water heaters can be used for heating when heating demand is low, and the engine can be started to intervene to provide sufficient heat when heating demand is high. Although plug-in hybrid vehicles can use engine combustion heat for heating and battery heating in winter, there is no need to worry about the vehicle's cruising range, but reasonable control of the power of the water heater is also a necessary development work.

[0003] By formulating a water heater control strategy, the combustion heat of the engine can be utilized to the maximum extent, the power consumption of the water heater can be reduced, and the vehicle's cruising range can be improved. Summary of the invention

[0004] The present invention proposes a PHEV vehicle water heater power control method, device, terminal and storage medium. By judging the vehicle charging and heating status, battery core status, etc., the battery heating level is evaluated, and the water heater power is reasonably controlled, so as to make full use of the engine combustion heat, save the energy consumption of the whole vehicle, and meet the heating needs of the driver and passengers.

[0005] The technical solution of the present invention is described as follows in conjunction with the accompanying drawings:

[0006] In a first aspect, an embodiment of the present invention provides a method for controlling the power of a water heater of a PHEV vehicle, comprising:

[0007] Step 1: Determine the battery heating level;

[0008] Step 2: Develop a water heater strategy based on the battery heating level, passenger compartment heating requirements, and vehicle charging and discharging status.

[0009] Furthermore, the specific method of step one is as follows:

[0010] 11) When the minimum temperature of the battery cell is ≥T1, the battery heating level is 0; when the minimum temperature of the battery cell is between T2-T3℃, the battery heating level is 1; when the minimum temperature of the battery cell is between T4-T5℃, the battery heating level is 2; when the minimum temperature of the battery cell is ≤T6, the battery heating level is 3;

[0011] 12) When the passenger compartment is in the heating state, if the engine water temperature Tfa ≥ Tmu+12°C, the battery heating level is 1, otherwise it is 0; when the passenger compartment is in the non-heating state, if the engine water temperature Tfa ≥ 60°C (≤ 55°C), the battery heating level is 1, otherwise it is 0;

[0012] When the battery heating level is determined to be 1 in step 11), step 12) should be performed; when the battery heating level is determined to be 0 in step 12), the battery heating level is 0.

[0013] Furthermore, the specific method of step 2 is as follows:

[0014] 21) When the passenger compartment does not need heating and the battery does not need heating, the water heater is turned off;

[0015] 22) When the passenger compartment does not need heating and the battery is charged for heating, if the engine water temperature Tfa is ≥60℃; or ≤55℃, the water heater is turned off, otherwise, PID control is performed according to the battery water inlet target temperature T7;

[0016] 23) When the passenger compartment does not need heating and the battery heating level is 1, the water heater is turned off;

[0017] 24) When the passenger compartment does not require heating and the battery heating level is 2, if the engine water temperature Tfa ≥ 60℃ or ≤ 55℃, the water heater is turned off, otherwise, PID control is performed according to the battery water inlet target temperature T7;

[0018] 25) When the passenger compartment does not require heating and the battery heating level is 3, if the engine water temperature Tfa ≥ 60℃ or ≤ 55℃, the water heater power is P1, otherwise, PID control is performed according to the battery water inlet target temperature T8, and the obtained power value is compared with P1, and the larger value is used as the target control power;

[0019] 26) When the passenger cabin needs heating but the battery does not need heating, PID control is performed according to the heating target water temperature;

[0020] 27) When the passenger cabin needs heating or battery charging heating, control is performed according to Tx;

[0021] 28) When the passenger compartment needs heating and the battery heating level is 1, PID control is performed according to the heating target water temperature;

[0022] 29) When the passenger compartment needs heating and the battery heating level is 2, control is performed according to Tx;

[0023] 210) When the passenger compartment needs heating and the battery heating level is 3, if the engine water temperature Tfa ≥ Ttarget, the water heater power is P1, otherwise, PID control is performed according to the battery water inlet target temperature Tx, and the obtained power value is compared with P1, and the larger value is used as the target control power.

[0024] Further, in step 27), when the warm air target water temperature is ≥80°C, Tx=T; when the warm air target water temperature is <80°C, Tx=80.

[0025] Further, in step 29), when the target water temperature of warm air is ≥80°C, Tx=Tme or Tme-5°C; when the target water temperature of warm air is <80°C, Tx=80.

[0026] In a second aspect, an embodiment of the present invention further provides a PHEV water heater power control device, comprising:

[0027] A determination module, used for determining a battery heating level;

[0028] The control module is used to formulate the water heater strategy according to the battery heating level, passenger compartment heating demand, and vehicle charging and discharging status.

[0029] In a third aspect, a terminal is provided, including:

[0030] one or more processors;

[0031] a memory for storing the one or more processor-executable instructions;

[0032] Wherein, the one or more processors are configured to:

[0033] Execute the method described in the first aspect of the embodiment of the present invention.

[0034] In a fourth aspect, a non-temporary computer-readable storage medium is provided. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the first aspect of an embodiment of the present invention.

[0035] In a fifth aspect, an application product is provided. When the application product is running on a terminal, the terminal executes the method described in the first aspect of the embodiment of the present invention.

[0036] The beneficial effects of the present invention are:

[0037] The present invention evaluates the battery heating level by determining the vehicle charging and heating status, battery core status, etc., and reasonably controls the water heater power, fully utilizing the combustion heat of the engine, saving vehicle energy consumption, and meeting the heating needs of drivers and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is a flow chart of a PHEV water heater power control method according to the present invention;

[0040] Figure 2 It is a structural schematic diagram of a PHEV vehicle water heater power control device according to the present invention;

[0041] Figure 3 The present invention is a schematic block diagram of a terminal structure. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Embodiment 1

[0045] This embodiment provides a new energy vehicle battery cooling hierarchical control method, which can be executed by a new energy vehicle battery cooling hierarchical control device in an embodiment of the present invention, which can be implemented in software and / or hardware, as follows:

[0046] See also Figure 1 , a PHEV vehicle water heater power control method, comprising the following steps:

[0047] Step 1: Determine the battery heating level, as follows:

[0048] 11) When the minimum temperature of the battery cell is ≥T1, the battery heating level is 0; when the minimum temperature of the battery cell is between T2-T3℃, the battery heating level is 1; when the minimum temperature of the battery cell is between T4-T5℃, the battery heating level is 2; when the minimum temperature of the battery cell is ≤T6, the battery heating level is 3;

[0049] 12) When the passenger compartment is in the heating state, if the engine water temperature Tfa ≥ Tmu+12°C, the battery heating level is 1, otherwise it is 0; when the passenger compartment is in the non-heating state, if the engine water temperature Tfa ≥ 60°C or ≤ 55°C, the battery heating level is 1, otherwise it is 0;

[0050] When the battery heating level is determined to be 1 in step 11), step 12) should be performed; when the battery heating level is determined to be 0 in step 12), the battery heating level is 0.

[0051] Step 2: Develop a water heater strategy based on the battery heating level, passenger compartment heating requirements, and vehicle charging and discharging status, as follows:

[0052] 21) When the passenger compartment does not need heating and the battery does not need heating, the water heater is turned off;

[0053] 22) When the passenger compartment does not need heating and the battery is charged for heating, if the engine water temperature Tfa is ≥60℃; or ≤55℃, the water heater is turned off, otherwise, PID control is performed according to the battery water inlet target temperature T7;

[0054] 23) When the passenger compartment does not need heating and the battery heating level is 1, the water heater is turned off;

[0055] 24) When the passenger compartment does not require heating and the battery heating level is 2, if the engine water temperature Tfa ≥ 60℃ or ≤ 55℃, the water heater is turned off, otherwise, PID control is performed according to the battery water inlet target temperature T7;

[0056] 25) When the passenger compartment does not require heating and the battery heating level is 3, if the engine water temperature Tfa ≥ 60℃ or ≤ 55℃, the water heater power is P1, otherwise, PID control is performed according to the battery water inlet target temperature T8, and the obtained power value is compared with P1, and the larger value is used as the target control power;

[0057] 26) When the passenger cabin needs heating but the battery does not need heating, PID control is performed according to the heating target water temperature;

[0058] 27) When the passenger compartment needs heating or battery charging heating, control is performed according to Tx; when the heating target water temperature is ≥80℃, Tx=T; when the heating target water temperature is <80℃, Tx=80

[0059] 28) When the passenger compartment needs heating and the battery heating level is 1, PID control is performed according to the heating target water temperature;

[0060] 29) When the passenger compartment needs heating and the battery heating level is 2, control is performed according to Tx; when the heating target water temperature is ≥80℃, Tx=Tme or Tme-5℃; when the heating target water temperature is <80℃, Tx=80;

[0061] 210) When the passenger compartment needs heating and the battery heating level is 3, if the engine water temperature Tfa ≥ Ttarget, the water heater power is P1, otherwise, PID control is performed according to the battery water inlet target temperature Tx, and the obtained power value is compared with P1, and the larger value is used as the target control power.

[0062] Among them, the relevant threshold value can be selected according to the system calibration.

[0063] In summary, the present invention controls the heating power of the water heater according to the state of the whole vehicle, maximizes the use of the combustion heat of the engine for heating, reduces the energy consumption of the whole vehicle, and improves the cruising range.

[0064] Embodiment 2

[0065] See also Figure 2 This embodiment provides a PHEV water heater power control device, including:

[0066] A determination module, used for determining a battery heating level;

[0067] The control module is used to formulate the water heater strategy according to the battery heating level, passenger compartment heating demand, and vehicle charging and discharging status.

[0068] Embodiment 3

[0069] Figure 3 1 is a block diagram of a terminal provided in an embodiment of the present application, and the terminal may be a terminal in the above embodiment. The terminal may be a portable mobile terminal, such as a smart phone or a tablet computer. The terminal may also be referred to as a user device, a portable terminal, or other names.

[0070] Typically, the terminal includes: a processor 301 and a memory 302 .

[0071] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0072] The memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. The memory 302 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 302 is used to store at least one instruction, which is used to be executed by the processor 301 to implement a PHEV vehicle water heater power control method provided in this application.

[0073] In some embodiments, the terminal may further include: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes: at least one of a radio frequency circuit 304 , a touch display screen 305 , a camera 306 , an audio circuit 307 , a positioning component 308 and a power supply 309 .

[0074] The peripheral device interface 303 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 301 and the memory 302. In some embodiments, the processor 301, the memory 302, and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302, and the peripheral device interface 303 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0075] The radio frequency circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 304 communicates with the communication network and other communication devices through electromagnetic signals. The radio frequency circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. The radio frequency circuit 304 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to: the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 304 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0076] The touch display screen 305 is used to display the UI (User Interface). The UI may include graphics, text, icons, videos and any combination thereof. The touch display screen 305 also has the ability to collect touch signals on the surface or above the surface of the touch display screen 305. The touch signal can be input to the processor 301 as a control signal for processing. The touch display screen 305 is used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the touch display screen 305 can be one, and the front panel of the terminal is set; in other embodiments, the touch display screen 305 can be at least two, which are respectively set on different surfaces of the terminal or are folded; in some other embodiments, the touch display screen 305 can be a flexible display screen, which is set on the curved surface or folded surface of the terminal. Even, the touch display screen 305 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The touch display screen 305 can be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode, organic light-emitting diode).

[0077] The camera assembly 306 is used to capture images or videos. Optionally, the camera assembly 306 includes a front camera and a rear camera. Typically, the front camera is used to realize video calls or selfies, and the rear camera is used to realize the shooting of photos or videos. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, and a wide-angle camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, and the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (Virtual Reality) shooting functions. In some embodiments, the camera assembly 306 may also include a flash. The flash can be a monochrome temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0078] The audio circuit 307 is used to provide an audio interface between the user and the terminal. The audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 301 for processing, or input them into the radio frequency circuit 304 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 301 or the radio frequency circuit 304 into sound waves. The speaker may be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 307 may also include a headphone jack.

[0079] The positioning component 308 is used to locate the current geographical location of the terminal to implement navigation or LBS (Location Based Service). The positioning component 308 can be a positioning component based on the US GPS (Global Positioning System) or China's Beidou system.

[0080] The power supply 309 is used to power various components in the terminal. The power supply 309 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 309 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery charged through a wired line, and a wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0081] Those skilled in the art will understand that Figure 3The structure shown in the figure does not constitute a limitation on the terminal, and may include more or less components than those shown in the figure, or combine certain components, or adopt a different component arrangement.

[0082] Embodiment 4

[0083] In an exemplary embodiment, a computer-readable storage medium is also provided, on which a computer program is stored. When the program is executed by a processor, a PHEV vehicle water heater power control method as provided in all the inventive embodiments of the present application is implemented.

[0084] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: 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 document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0085] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0086] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0087] 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., via the Internet using an Internet service provider).

[0088] Embodiment 5

[0089] In an exemplary embodiment, an application product is also provided, including one or more instructions, which can be executed by the processor 301 of the above-mentioned device to complete the above-mentioned PHEV model water heater power control method.

[0090] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and implementation mode. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A PHEV water heater power control method, characterized in that: The following steps are involved: Step 1: Determine the battery heating level; Step 2: Develop a water heater strategy based on the battery heating level, passenger compartment heating requirements, and vehicle charging and discharging status.

2. A PHEV water heater power control method according to claim 1, characterized in that: The specific method of step one is as follows: 11) When the minimum temperature of the battery cell is ≥T1, the battery heating level is 0; when the minimum temperature of the battery cell is between T2-T3℃, the battery heating level is 1; when the minimum temperature of the battery cell is between T4-T5℃, the battery heating level is 2; when the minimum temperature of the battery cell is ≤T6, the battery heating level is 3; 12) When the passenger compartment is in the heating state, if the engine water temperature Tfa ≥ Tmu+12°C, the battery heating level is 1, otherwise it is 0; when the passenger compartment is in the non-heating state, if the engine water temperature Tfa ≥ 60°C or ≤ 55°C, the battery heating level is 1, otherwise it is 0; When the battery heating level is determined to be 1 in step 11), step 12) should also be performed. When the battery heating level is determined to be 0 in step 12), the battery heating level is 0.

3. A PHEV water heater power control method according to claim 1, characterized in that: The specific method of step 2 is as follows: 21) When the passenger compartment does not need heating and the battery does not need heating, the water heater is turned off; 22) When the passenger compartment does not need heating and the battery is charged for heating, if the engine water temperature Tfa ≥ 60℃; or ≤ 55℃, the water heater is turned off, otherwise, PID control is performed according to the battery water inlet target temperature T7; 23) When the passenger compartment does not need heating and the battery heating level is 1, the water heater is turned off; 24) When the passenger compartment does not require heating and the battery heating level is 2, if the engine water temperature Tfa ≥ 60℃ or ≤ 55℃, the water heater is turned off, otherwise, PID control is performed according to the battery water inlet target temperature T7; 25) When the passenger compartment does not require heating and the battery heating level is 3, if the engine water temperature Tfa ≥ 60℃ or ≤ 55℃, the water heater power is P1, otherwise, PID control is performed according to the battery water inlet target temperature T8, and the obtained power value is compared with P1, and the larger value is used as the target control power; 26) When the passenger cabin needs heating but the battery does not need heating, PID control is performed according to the target water temperature of the heating air; 27) When the passenger cabin needs heating or battery charging heating, control is performed according to Tx; 28) When the passenger compartment needs heating and the battery heating level is 1, PID control is performed according to the heating target water temperature; 29) When the passenger compartment needs heating and the battery heating level is 2, control is performed according to Tx; 210) When the passenger compartment needs heating and the battery heating level is 3, if the engine water temperature Tfa ≥ Ttarget, the water heater power is P1, otherwise, PID control is performed according to the battery water inlet target temperature Tx, and the obtained power value is compared with P1, and the larger value is used as the target control power.

4. A PHEV water heater power control method according to claim 3, characterized in that: In step 27), when the target water temperature of warm air is ≥80°C, Tx=T; when the target water temperature of warm air is <80°C, Tx=80.

5. The method for controlling the water heater power of a PHEV vehicle according to claim 3, characterized in that: In step 29), when the target water temperature of warm air is ≥80°C, Tx=Tme or Tme-5°C; when the target water temperature of warm air is <80°C, Tx=80.

6. A PHEV water heater power control device, characterized in that: include: A determination module, used for determining a battery heating level; The control module is used to formulate the water heater strategy according to the battery heating level, passenger compartment heating demand, and vehicle charging and discharging status.

7. A terminal, characterized in that: include: one or more processors; a memory for storing the one or more processor-executable instructions; Wherein, the one or more processors are configured to: Execute a PHEV vehicle water heater power control method as described in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to execute the PHEV vehicle water heater power control method as described in any one of claims 1 to 5.

Images