Parking air conditioner and parking air conditioner system

Abstract

The utility model provides a parking air conditioner and a parking air conditioner system, the parking air conditioner comprises a parking air conditioner external unit and a parking air conditioner internal unit, and the parking air conditioner external unit and the parking air conditioner internal unit carry out information interaction through a communication circuit; the parking air conditioner outdoor unit is provided with an outdoor unit main control circuit and an NB circuit module, the NB circuit module is electrically connected with the outdoor unit main control circuit, and the NB circuit module is used for carrying out information interaction with the cloud server; the NB circuit module comprises an NB chip and a TTL level conversion circuit, and the outdoor unit master control circuit and the NB chip are electrically connected through the TTL level conversion circuit. The parking air conditioner provided by the utility model can improve the network coverage range and the signal intensity.

Description

Technical Field

[0001] The utility model relates to the technical field of parking air conditioners. Specifically, it relates to a parking air conditioner and also to a parking air conditioner system applying the parking air conditioner. Background Art

[0002] With the continuous increase in consumers' demand for parking air conditioners, the development prospect of the parking air conditioner market is very optimistic. Especially in the fields of long-distance transportation, logistics, etc., the parking air conditioner has become an important equipment to improve the comfort of drivers and reduce fatigue driving. The parking air conditioner is powered by an in-vehicle battery and does not need to rely on the vehicle engine, and can continue to be used when the vehicle is parked, providing a comfortable temperature environment for drivers and passengers.

[0003] In some existing household air conditioner systems, in order to be able to remotely monitor and control the air conditioner, an NB-IOT module is set on the air conditioner for communication with a remote server. Users can not only control the air conditioner through an infrared remote control on-site, but also remotely monitor and control the air conditioner on a remote client, realizing continuous monitoring, remote wireless transmission and remote monitoring of the air conditioner. This dual-mode air conditioner control system can not only timely discover the fault information of the air conditioner from the source, but also issue commands to the air conditioner through the remote client, greatly facilitating people's lives and truly realizing real-time remote monitoring of the air conditioner.

[0004] However, this solution is for household air conditioners, and the NB-IOT module is set on one side of the indoor unit for the convenience of controlling one side of the indoor unit. For parking air conditioners, there is no case of applying NB technology to parking air conditioners for remote control and monitoring. Moreover, if the NB-IOT module is on one side of the indoor unit, it will cause a certain shielding effect on the signal, thus affecting the signal transmission.

[0005] Therefore, when applying NB technology to parking air conditioners, a more optimized setting method needs to be considered. Summary of the Utility Model

[0006] The first object of the utility model is to provide a parking air conditioner that improves the network coverage and signal strength.

[0007] The second object of the utility model is to provide a parking air conditioner system that improves the network coverage and signal strength.

[0008] To achieve the above first objective, the parking air conditioner provided by the present utility model includes an outdoor unit of the parking air conditioner and an indoor unit of the parking air conditioner. The outdoor unit and the indoor unit of the parking air conditioner perform information interaction through a communication circuit. The outdoor unit of the parking air conditioner is provided with an outdoor main control circuit and an NB circuit module. The NB circuit module is electrically connected to the outdoor main control circuit, and the NB circuit module is used for information interaction with a cloud server. The NB circuit module includes an NB chip and a TTL level conversion circuit, and the outdoor main control circuit and the NB chip are electrically connected through the TTL level conversion circuit.

[0009] As can be seen from the above solution, for the parking air conditioner of the present utility model, by arranging the NB circuit module on the outdoor unit of the parking air conditioner, compared with wireless communication networks such as WI-FI networks or 4G networks, the NB-IoT network has a wider coverage range and can connect more devices. At the same time, the NB circuit module is installed on the side of the outdoor unit of the parking air conditioner, which can reduce the signal shielding and improve the communication effect. In addition, high-power communication devices may be installed in the parking air conditioner, and its antenna is prone to coupling with the negative power supply wire to generate oscillations, which may further cause abnormal communication between the single-chip microcomputer and the NB chip. When the single-chip microcomputer and the NB chip are directly connected by a wire, they are easily affected by radiation interference. Adding a TTL level conversion circuit between the outdoor main control circuit and the NB circuit module can reduce the voltage peak value, thereby protecting the microcontroller from damage by pulses (ESD) and ensuring proper level conversion of the signal.

[0010] In a further solution, the TTL level conversion circuit includes a first path and a second path; the transmitting end of the outdoor main control circuit is electrically connected to the receiving end of the NB chip through the first path; the receiving end of the outdoor main control circuit is electrically connected to the transmitting end of the NB chip through the first path.

[0011] It can be seen from this that the TTL level conversion circuit can reduce signal interference by setting the first path and the second path to respectively send and receive signals.

[0012] In a further solution, the first path includes a first NPN transistor, a first capacitor, a first resistor, and a first pull-up resistor. The first capacitor and the first resistor are connected in parallel between the base of the first NPN transistor and the power supply circuit. The emitter of the first NPN transistor is electrically connected to the transmitting end of the outdoor main control circuit, the collector of the first NPN transistor is electrically connected to the receiving end of the NB chip, and the collector of the first NPN transistor is also electrically connected to the power supply circuit through the first pull-up resistor.

[0013] In a further solution, the second path includes a second NPN transistor, a second capacitor, a second resistor, and a second pull-up resistor. The second capacitor and the second resistor are connected in parallel between the base of the second NPN transistor and the power supply circuit. The emitter of the second NPN transistor is electrically connected to the emission terminal of the NB chip. The collector of the second NPN transistor is electrically connected to the receiving terminal of the outdoor unit main control circuit. The collector of the second NPN transistor is also electrically connected to the power supply circuit through the second pull-up resistor.

[0014] It can be seen that through the setting of transistors, capacitors, and pull-up resistors in the first path and the second path, when there is oscillation at the power supply end, the filtering capacitor will filter out some ripples, and the existence of the pull-up resistor can ensure a stable high-level reference, reducing the impact of oscillation, helping to prevent electrical interference and data contamination, and improving the reliability and security of the overall communication system.

[0015] In a further solution, the in-vehicle air conditioner indoor unit includes an indoor unit main control circuit and a voice circuit module, and the voice circuit module is electrically connected to the indoor unit main control circuit.

[0016] It can be seen that by setting the voice circuit module, it is convenient to perform voice control on the in-vehicle air conditioner.

[0017] In a further solution, the voice circuit module is electrically connected to the power supply circuit through a cold start circuit.

[0018] In a further solution, the cold start circuit includes a MOS transistor and a reset switch. The reset switch is electrically connected to the gate of the MOS transistor. The first pole of the MOS transistor is electrically connected to the power supply circuit. The second pole of the MOS transistor is electrically connected to the power supply terminal of the voice circuit module. The reset switch is used to send a control signal to the MOS transistor.

[0019] It can be seen that the voice circuit module is generally powered on and reset by means of hot plugging or switch power supply. Before some chips are programmed, it is necessary to ensure that the chips are powered on, and after identification, they are powered off and reset and then powered on again to be successfully programmed. The time interval between power-off reset and secondary power-on cannot be too long or too short. Only by means of hot plugging or switch power-off, it is easy to cause programming failure. Therefore, the voice circuit module is electrically connected to the power supply circuit through a cold start circuit, which can improve the success rate of reset.

[0020] In a further solution, the in-vehicle air conditioner indoor unit further includes a short-range wireless communication circuit for communicating with a smart control terminal, and the short-range wireless communication circuit is electrically connected to the indoor unit main control circuit.

[0021] It can be seen that by setting the short-range wireless communication circuit, it is convenient for users to perform short-range wireless control of the air conditioner.

[0022] In a further solution, the short - range wireless communication circuit includes at least one of a 2.4G communication circuit, an infrared communication circuit, a Bluetooth communication circuit, and a Wi - Fi communication circuit.

[0023] It can be seen that by setting multiple short - range wireless communication circuits, the diversity of the air - conditioner control scenarios can be improved.

[0024] To achieve the above - mentioned second object, the parking air - conditioner system provided by the present utility model includes a parking air - conditioner and a cloud server. The parking air - conditioner adopts the above - mentioned parking air - conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the circuit principle block diagram of an embodiment of the parking air - conditioner system of the present utility model.

[0026] Figure 2 is the circuit principle block diagram of the NB circuit module in an embodiment of the parking air - conditioner system of the present utility model.

[0027] Figure 3 is the circuit schematic diagram of the TTL level conversion circuit in an embodiment of the parking air - conditioner system of the present utility model.

[0028] Figure 4 is the circuit schematic diagram of the cold - start circuit in an embodiment of the parking air - conditioner system of the present utility model.

[0029] The present utility model will be further described below in conjunction with the drawings and embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Embodiment of the parking air - conditioner system:

[0031] As Figure 1 shown, in this embodiment, the parking air - conditioner system includes a parking air - conditioner, a cloud server 3, and an intelligent control terminal 4. The parking air - conditioner and the cloud server 3 perform information interaction, and both the parking air - conditioner and the cloud server 3 perform information interaction with the intelligent control terminal 4.

[0032] In this embodiment, the parking air - conditioner includes a parking air - conditioner indoor unit 1 and a parking air - conditioner outdoor unit 2. The parking air - conditioner outdoor unit 2 and the parking air - conditioner indoor unit 1 perform information interaction through a communication circuit (not shown). The communication circuit adopts a wired communication circuit. Preferably, the communication circuit adopts a 485 communication circuit. The parking air - conditioner outdoor unit 2 is installed outside the vehicle compartment, and the parking air - conditioner indoor unit 1 is installed inside the compartment.

[0033] The parking air - conditioner outdoor unit 2 is provided with an outdoor main control circuit 21 and an NB circuit module 22. The NB circuit module 22 is electrically connected to the outdoor main control circuit 21, and the NB circuit module 22 is used for information interaction with the cloud server 3. In this embodiment, refer to Figure 2, the NB circuit module 22 includes an NB chip 221 and a TTL level conversion circuit 222. The outdoor unit main control circuit 21 and the NB chip 221 are electrically connected through the TTL level conversion circuit 222. Since high-power communication devices may be installed in the parking air conditioner, its antenna is prone to coupling with the negative power supply wire to generate oscillations, which may lead to abnormal communication between the single-chip microcomputer and the NB chip 221. When the single-chip microcomputer and the NB chip 221 are directly connected by a wire, they are easily affected by radiation interference. Adding a TTL level conversion circuit 222 between the outdoor unit main control circuit 21 and the NB circuit module 22 can reduce the voltage peak, thereby protecting the microcontroller from pulse (ESD) damage and ensuring proper level conversion of the signal. The NB chip 221 uses a well-known chip, for example, a chip of the BC28-F model.

[0034] See Figure 3 , in this embodiment, the TTL level conversion circuit 222 includes a first path 223 and a second path 224. The transmitting end of the outdoor unit main control circuit 21 is electrically connected to the receiving end of the NB chip 221 through the first path 223, and the receiving end of the outdoor unit main control circuit 21 is electrically connected to the transmitting end of the NB chip 221 through the first path 223.

[0035] The first path 223 includes a first NPN transistor Q1, a first capacitor C1, a first resistor R1, and a first pull-up resistor R2. The first capacitor C1 and the first resistor R1 are connected in parallel between the base of the first NPN transistor Q1 and the power supply circuit. The emitter of the first NPN transistor Q1 is electrically connected to the transmitting end of the outdoor unit main control circuit 21 through the terminal TXD. The collector of the first NPN transistor Q1 is electrically connected to the receiving end of the NB chip 221 through the terminal NB-RXD. The collector of the first NPN transistor Q1 is also electrically connected to the power supply circuit through the first pull-up resistor R2. The second path 224 includes a second NPN transistor Q2, a second capacitor C2, a second resistor R3, and a second pull-up resistor R4. The second capacitor C2 and the second resistor R3 are connected in parallel between the base of the second NPN transistor Q2 and the power supply circuit. The emitter of the second NPN transistor Q2 is electrically connected to the transmitting end of the NB chip 221 through the terminal NB-TXD. The collector of the second NPN transistor Q2 is electrically connected to the receiving end of the outdoor unit main control circuit 21 through the terminal RXD. The collector of the second NPN transistor Q2 is also electrically connected to the power supply circuit through the second pull-up resistor R4. By setting transistors, capacitors, and pull-up resistors in the first path 223 and the second path 224, when there are oscillations in the power supply circuit, the filter capacitor can filter out some ripples, and the existence of the pull-up resistor can ensure a stable high-level reference, reducing the impact of oscillations, helping to prevent electrical interference and data contamination, and improving the reliability and security of the overall communication system.

[0036] By Figure 1It can be known that the in-vehicle air conditioner indoor unit 1 includes an indoor unit main control circuit 11, a voice circuit module 12, and a short-range wireless communication circuit 13. The voice circuit module 12 and the short-range wireless communication circuit 13 are both electrically connected to the indoor unit main control circuit 11. By setting the voice circuit module 12, it is convenient to perform voice control on the in-vehicle air conditioner.

[0037] In this embodiment, referring to Figure 4 , the voice circuit module 12 is electrically connected to the power supply circuit through a cold start circuit 14. The cold start circuit 14 includes an MOS transistor Q3 and a reset switch SW. The reset switch SW is electrically connected to the gate of the MOS transistor Q3. The first pole of the MOS transistor Q3 is electrically connected to the power supply circuit. The second pole of the MOS transistor Q3 is electrically connected to the power supply terminal of the voice circuit module 12. The reset switch SW is used to send a control signal to the MOS transistor Q3.

[0038] In this embodiment, the MOS transistor Q3 is a PMOS transistor. The working principle of the cold start circuit 14 is as follows: when the reset switch SW is in the off state, there is no voltage at the gate. Due to the characteristics of the PMOS transistor, the current flows from the drain to the source, that is, the voice circuit module 12 is powered on and can work normally; when the reset switch SW is pressed, the gate is powered on. Due to the characteristics of the PMOS transistor, the drain and the source cannot conduct, and there is no current in the circuit, that is, the voice circuit module 12 is powered off; after releasing the reset switch SW, the voice circuit module 12 is powered on and reset.

[0039] The voice circuit module 12 is generally powered on and reset by means of hot plugging or switch power supply. Before some chips are burned, it is necessary to ensure that the chips are powered on. After recognition, they are powered off and reset and then powered on again to successfully burn. The time interval between power-off reset and secondary power-on cannot be too long or too short. Only by means of hot plugging or switch power-off, it is easy to cause the burning to fail. Therefore, the voice circuit module 12 is electrically connected to the power supply circuit through the cold start circuit 14, which can improve the success rate of reset.

[0040] The short-range wireless communication circuit 13 is used to communicate with the intelligent control terminal 4. In this embodiment, the short-range wireless communication circuit 13 includes at least one of a 2.4G communication circuit, an infrared communication circuit, a Bluetooth communication circuit, and a WiFi communication circuit. By setting a variety of short-range wireless communication circuits 13, the diversity of air conditioner control scenarios can be improved. The intelligent control terminal 4 includes intelligent terminals such as mobile phones, tablet computers, and remote controls.

[0041] When the parking air conditioner system is working, the indoor unit 1 of the parking air conditioner and the outdoor unit 2 of the parking air conditioner exchange information through a 485 communication circuit. Among them, the outdoor unit 2 of the parking air conditioner is the host, and the indoor unit 1 of the parking air conditioner is the slave. The indoor unit 1 of the parking air conditioner receives information from the remote control through an infrared communication circuit, a Bluetooth communication circuit, a 2.4G communication circuit, etc. In addition to receiving signals from the remote control, the indoor unit 1 of the parking air conditioner also needs to collect indoor environment parameters such as the inner loop temperature in real time, and finally feedback the relevant information to the outdoor unit 2 of the parking air conditioner through a 485 communication circuit, and the outdoor unit 2 of the parking air conditioner uploads it to the cloud server 3 through the NB circuit module 22.

[0042] While receiving various parameters from the indoor unit 1 of the parking air conditioner, the outdoor unit 2 of the parking air conditioner also needs to collect outdoor environment parameters such as the exhaust pipe temperature, the outer pipe temperature, and the outer loop temperature, and summarize and calculate the above parameters. Together with the working mode of the indoor unit 1 of the parking air conditioner, the working mode of the indoor unit 1 of the parking air conditioner, etc., it is uploaded to the cloud server 3 through the NB circuit module 22. If the cloud server 3 issues an instruction to control the air conditioner, the outdoor unit 2 of the parking air conditioner will perform corresponding actions according to the instruction.

[0043] The intelligent control terminal 4 can remotely control the indoor unit 1 of the parking air conditioner through short-range wireless control methods such as 2.4G, infrared, and Bluetooth, and can also directly issue instructions on the cloud server 4.

[0044] From the above solution, it can be seen that for the parking air conditioner of the present utility model, by setting the NB circuit module 22 on the outdoor unit 2 of the parking air conditioner, compared with wireless communication networks such as WI FI networks or 4G networks, the NB-IoT network has a wider coverage range and can connect more devices. At the same time, the NB circuit module 22 is installed on the side of the outdoor unit 2 of the parking air conditioner, which can reduce signal shielding and improve communication effects.

[0045] It should be noted that the above is only the preferred embodiment of the present utility model, but the design concept of the utility model is not limited thereto. Any non-substantive modification made to the present utility model using this concept also falls within the protection scope of the present utility model.

Claims

1. A parking air conditioner, comprising a parking air conditioner outdoor unit and a parking air conditioner indoor unit, wherein the parking air conditioner outdoor unit and the parking air conditioner indoor unit exchange information via a communication circuit; Features: The parking air conditioner outdoor unit is provided with an outdoor unit main control circuit and a NB circuit module, the NB circuit module is electrically connected to the outdoor unit main control circuit, and the NB circuit module is used to exchange information with the cloud server; The NB circuit module includes a NB chip and a TTL level conversion circuit, and the external machine main control circuit and the NB chip are electrically connected via the TTL level conversion circuit.

2. The parking air conditioner according to claim 1, characterized in that: The TTL level conversion circuit includes a first path and a second path; The transmitting end of the external machine main control circuit is electrically connected to the receiving end of the NB chip through the first path; The receiving end of the external machine main control circuit is electrically connected to the transmitting end of the NB chip through the first path.

3. The parking air conditioner according to claim 2, characterized in that: The first path includes a first NPN transistor, a first capacitor, a first resistor and a first pull-up resistor. The first capacitor and the first resistor are connected in parallel between the base of the first NPN transistor and the power supply circuit. The emitter of the first NPN transistor is electrically connected to the transmitting end of the external machine main control circuit. The collector of the first NPN transistor is electrically connected to the receiving end of the NB chip. The collector of the first NPN transistor is also electrically connected to the power supply circuit through the first pull-up resistor.

4. The parking air conditioner according to claim 2, characterized in that: The second path includes a second NPN transistor, a second capacitor, a second resistor and a second pull-up resistor, the second capacitor and the second resistor are connected in parallel between the base of the second NPN transistor and the power supply circuit, the emitter of the second NPN transistor is electrically connected to the transmitting end of the NB chip, the collector of the second NPN transistor is electrically connected to the receiving end of the external machine main control circuit, and the collector of the second NPN transistor is also electrically connected to the power supply circuit through the second pull-up resistor.

5. The parking air conditioner according to any one of claims 1 to 4, characterized in that: The parking air conditioner indoor unit comprises an indoor unit main control circuit and a voice circuit module, and the voice circuit module is electrically connected to the indoor unit main control circuit.

6. The parking air conditioner according to claim 5, characterized in that: The voice circuit module is electrically connected to the power circuit through a cold start circuit.

7. The parking air conditioner according to claim 6, characterized in that: The cold start circuit includes a MOS tube and a reset switch, wherein the reset switch is electrically connected to the gate of the MOS tube, the first electrode of the MOS tube is electrically connected to the power circuit, and the second electrode of the MOS tube is electrically connected to the power supply terminal of the voice circuit module; The reset switch is used to send a control signal to the MOS tube.

8. The parking air conditioner according to claim 5, characterized in that: The parking air conditioner indoor unit also includes a short-range wireless communication circuit for communicating with an intelligent control terminal, and the short-range wireless communication circuit is electrically connected to the indoor unit main control circuit.

9. The parking air conditioner according to claim 8, characterized in that: The short-range wireless communication circuit includes at least one of a 2.4G communication circuit, an infrared communication circuit, a Bluetooth communication circuit and a WiFi communication circuit.

10. A parking air conditioning system, comprising a parking air conditioner and a cloud server, characterized in that: The parking air conditioner adopts the parking air conditioner according to any one of claims 1 to 9.

Images