Intelligent direct current distribution working system

Abstract

An intelligent direct current distribution working system, comprising a vehicle body, the vehicle body comprising a vehicle head, an inner space, the inner space comprising a first space, a second space and a third space in sequence from front to back; a power module, an air conditioner and a controller are arranged in the vehicle head, the power module is used for distributing direct current to the air conditioner, the controller and an electrical cabinet, the electrical cabinet is used for controlling power supply to an electric module, the electric module comprises an interactive module, a fax printing and scanning all-in-one machine, a paper shredder and a communication radio station, the interactive module comprises an input module, a display screen, an indicator light and an interface; the interface is connected to the controller through a cable, and the controller outputs a control signal to the power module.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of special vehicles for field operations, in particular to an intelligent direct current distribution system. BACKGROUND

[0002] The existing shelter has diversified internal equipment, and the equipment is becoming more and more important, so an intelligent distribution system is needed. Through this system, the power output can be controlled in real time, and accurate protection can be achieved to ensure the safety of the equipment in the vehicle. Among various electrical equipment, problems that occur during the use of air conditioners include ice blockage (i.e. the freezing of the contraction pipe section of the expansion valve). Although ice blockage is one of the problems of the expansion valve, it is not easy to occur. However, when the shelter or special equipment manufactured by Hengyang Taihao is driven outdoors, such as in strong wind weather or high-speed driving, strong wind enters the vehicle body from the air inlet grille, which can disturb the fan of the vehicle-mounted air conditioner, for example, it can disturb the blowing of the vehicle-mounted fan, causing the cold air generated by the heat absorption at the evaporator position to be unable to enter the vehicle, and the vehicle cannot be cooled. The electronic expansion valve in the vehicle-mounted air conditioner can freeze due to the inability to discharge cold air for a long time, causing ice blockage problems. Therefore, compared with indoor air conditioners, the demand for solving ice blockage problems is greater for shelter air conditioners.

[0003] In actual engineering practice, the following problems exist:

[0004] 1. The existing technology commonly used to solve the ice blockage problem includes connecting a drying device to the air conditioner, completely disassembling and repairing or replacing it, and turning off the air conditioner and letting it stand, but the outdoor application properties of the shelter equipment make it impossible to apply the above-mentioned solutions. Few existing technologies use heating equipment, but there are problems about when to start heating and when to stop. Since the detection position of the detection of the heating element opening and closing time is in the ice blockage section of the expansion valve, the ice blockage section is located in the contraction pipe section, and the small size of the contraction pipe section makes it difficult to arrange the sensor, and there is a problem that the sensor is frozen together after the ice blockage section freezes. Artificial judgment of the opening and closing of the heating element is also not feasible, as artificial judgment cannot determine the cause of the fault and cannot determine the specific opening and closing time of the heating.

[0005] 2. The vehicle-mounted air conditioner in the existing technology can use sensors to respond to different working conditions or faults, but it does not realize the influence of the user's behavior pattern on the operation, and the designer does not realize the relationship between the user's behavior pattern and the structure. Therefore, it relies too much on sensors to achieve automation, which increases the cost, and the design idea is too inert and has too much limitation, which hinders the development of science and technology.

[0006] 3. The electronic expansion valve in the existing technology has a small fluid area in the contraction pipe, and it is difficult to set a structure inside if the structure size is too large, and it is difficult to ensure the function if the structure size is too small.

[0007] Four, in the prior art electronic expansion valve, when ice blockage occurs, the position of ice block in the contraction pipe cannot be determined, so that targeted processing cannot be performed.

[0008] Five, in the prior art electronic expansion valve, the stroke mechanism is determined, however, if the fault stroke and the normal stroke are the same, the stroke detection cannot distinguish between faults and normal. SUMMARY

[0009] In order to overcome the above problems, the present application proposes a scheme that simultaneously solves the above various problems.

[0010] The technical scheme adopted by the present application to solve its technical problems is: an intelligent direct current distribution working system, comprising a vehicle body, the vehicle body comprising a vehicle head and an internal space, the internal space comprising a first space, a second space and a third space in sequence from front to back; a power module, an air conditioner and a controller are arranged in the vehicle head, the power module is used to distribute direct current to the air conditioner, the controller and an electrical cabinet, the electrical cabinet is used to control power supply to an electric module, the electric module comprising an interactive module, a fax printing and scanning all-in-one machine, a paper shredder and a communication radio, the interactive module comprising an input module, a display screen, an indicator light and an interface; the interface is connected to the controller through a cable, the controller outputs a control signal to the power module, thereby controlling the power supply of the power module to the air conditioner and the electrical cabinet; the first space is provided with the interactive module, the fax printing and scanning all-in-one machine, the paper shredder, a main driver seat and a co-driver seat, the second space is provided with a third seat and a fourth seat, and the third space is provided with the electrical cabinet and the communication radio; the electrical cabinet is provided with a switch module for controlling the power supply to the electric module;

[0011] The air conditioner is provided with an electronic expansion valve for controlling the on-off of refrigerant; the electronic expansion valve comprises a valve body, a housing, a driving part, a valve needle, a valve seat, an outlet pipe, a top abutting piece, a heating element, an inlet and an outlet; wherein the valve needle comprises a needle head, a rod part, an extension rod, a first lifting part and a second lifting part;

[0012] The valve body is provided with a housing above, the housing is provided with a driving part inside, the driving part can drive the valve needle to move up and down, the valve body is provided with the valve seat inside, the valve seat is provided with a seat hole, the needle head of the valve needle can move to block the seat hole, the valve body is provided with an inlet on the side, the valve body is provided with the outlet below, and the seat hole is communicated with the outlet;

[0013] The upper end of the outlet pipe is connected with the lower end of a valve seat, two top abutting pieces are connected with the lower end of the valve seat and located in the outlet pipe, the upper end of the rod part penetrates through the valve body and extends into the shell, a needle head is arranged at the lower end of the rod part, the lower end of the needle head is connected with the extension rod, the extension rod extends into the outlet pipe, a first lifting part is arranged at the lower end of the extension rod, a second lifting part is further connected with the extension rod above the first lifting part; a heating element is arranged on the outer wall of the outlet pipe.

[0014] The first lifting part comprises a first supporting rod and a first horizontal rod, and the second lifting part comprises a second supporting rod and a second horizontal rod; the first supporting rod and the second supporting rod are separated by 180 degrees in the circumferential direction; when the needle head does not block the seat hole after the air conditioner is turned on, the ice block is lifted together with the extension rod when the valve needle is lifted by the user operation, the ice block is blocked by the top abutting piece during the movement and thus cannot continue to be lifted, so that the valve needle cannot complete the lifting, the position sensor does not transmit the information that the valve needle completes the stroke to the controller within a first specified time, and then the controller controls the heating element to start heating; when the ice block is melted and the valve needle completes the lifting stroke, the position sensor transmits the information to the controller, and the controller controls the heating element to stop heating; when the valve needle still does not complete the lifting stroke after the heating element is heated for a second specified time, the air conditioner stops running.

[0015] Preferably, the needle head is a frustum.

[0016] Preferably, the needle head comprises a large-diameter end and a small-diameter end.

[0017] Preferably, the diameter of the large-diameter end is smaller than the diameter of the rod part.

[0018] Preferably, the diameter of the small-diameter end is larger than the diameter of the extension rod.

[0019] Preferably, the middle part of the first horizontal rod is connected with the extension rod through the first supporting rod.

[0020] Preferably, the middle part of the second horizontal rod is connected with the extension rod through the second supporting rod.

[0021] Preferably, the lower end of the valve body comprises a convex ring part.

[0022] Preferably, the inner wall of the convex ring part is attached to the outer wall of the outlet pipe.

[0023] Preferably, a transition surface is arranged between the needle head and the rod part.

[0024] The beneficial effects of the present application are:

[0025] The first point raised in the background art discards the in-pipe sensor which is difficult to arrange directly, and instead uses a stroke sensor to logically determine whether an ice blockage phenomenon exists. An extension rod is arranged at the lower end of the needle of the valve needle, the extension rod is frozen together with the ice block and moves as a whole, and the position of the whole can be determined to form an ice block determination, so as to control the heating of the heating element. After a period of heating, the ice melts, and the stroke satisfies the preset value, and the heating is stopped. When the valve needle still does not complete the lifting stroke after the heating element is heated for a second specified time, it is determined that it is not an ice blockage phenomenon, but other faults such as severe dirt blockage, and the air conditioner stops running.

[0026] The second point raised in the background art is that the user behavior mode is analyzed in depth and mapped to the structure design, so that the structure is changed accordingly. When the air conditioning refrigeration capacity decreases or the air outlet in the vehicle does not blow out, the user's first reaction is to increase the refrigeration capacity, which is reflected in the operation by increasing the compressor power and increasing the opening of the electronic expansion valve to make more refrigerant flow in the cycle. At this time, the valve needle is lifted to increase the opening of the expansion valve. Therefore, when judging whether there is an ice blockage by stroke detection, the structure improvement point is set to arrange the stroke detection in the lifting stroke. Therefore, the structure design is in line with the user's operation habit. Of course, if the user directly closes the air conditioner, the depression of the valve needle extension rod also has a certain destructive effect on the ice blockage, and after a period of refrigeration stop, the ice blockage phenomenon naturally disappears.

[0027] The third point raised in the background art is that at least two opposite "T" shaped lifting parts are arranged on the extension rod. The T-shaped structure is conducive to lifting the ice block, and the T-shaped structure is composed of two straight lines, which does not occupy too much flow area, and at the same time ensures the flow and lifting functions.

[0028] The fourth point raised in the background art is that the at least two lifting parts are located at different positions in the height direction of the extension rod, so as to ensure the lifting of ice blocks of different heights.

[0029] The fifth point raised in the background art is to distinguish between faults and normal strokes. A stopper is arranged below the valve seat without affecting the flow of the fluid. The stopper can block the ice block to block the frozen whole component, but the stopper does not interfere with the stroke of the single extension rod lifting part. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below in combination with the drawings and examples.

[0031] Figure 1 The valve needle closing position cross-sectional view of the application

[0032] Figure 2 The air conditioner starts, and the valve needle opening cross-sectional view of the application is appropriate

[0033] Figure 3 For the normal condition of the application, the valve needle maximum opening profile diagram is started

[0034] Figure 4 For the ice blocking condition of the application, the valve needle cannot realize the maximum opening profile diagram

[0035] Figure 5 For the application, the top view of the extension rod is shown schematically

[0036] Figure 6 For the application, the inside of the vehicle body is shown schematically

[0037] Figure 7 For the application, the optional electrical control block diagram related to the specific model is shown schematically

[0038] In the figure, the reference signs are as follows:

[0039] 1, valve body, 2, housing, 3, valve needle, 4, valve seat, 5, needle, 6, rod, 7, extension rod, 8, first lifting part, 9, second lifting part, 10, outlet pipe, 11, top resistance, 12, heating element, 13, inlet, 14, first support rod, 15, first cross rod, 16, second support rod, 17, second cross rod, 18, seat hole, 19, ice block, 20, convex ring part, 21, vehicle body, 22, interactive module, 23, main driving position, 24, paper shredder, 25, third seat, 26, fax printing and scanning all-in-one machine, 27, electrical cabinet, 28, co-driver position, 29, fourth seat, 30, communication radio. DETAILED DESCRIPTION

[0040] As shown in the figure: an intelligent direct current distribution system, including a vehicle body, the vehicle body includes a vehicle head, an interior space, the interior space includes a first space, a second space, a third space in turn from front to back; The vehicle head is provided with a power module, an air conditioner, a controller, the power module is used for distributing direct current to the air conditioner, the controller and the electrical cabinet, the electrical cabinet is used for controlling the power supply to the power module, the power module includes an interactive module, a fax printing and scanning all-in-one machine, a paper shredder, a communication radio, the interactive module includes an input module, a display screen, an indicator light, an interface; The interface is connected to the controller through a cable, the controller outputs a control signal to the power module, so as to control the power supply of the power module to the air conditioner and the electrical cabinet; The first space is provided with an interactive module, a fax printing and scanning all-in-one machine, a paper shredder, a main driving position and a co-driver position, the second space is provided with a third seat and a fourth seat, and the third space is provided with an electrical cabinet and a communication radio; The electrical cabinet is provided with a switch module for controlling the power supply to the power module;

[0041] The air conditioner is provided with an electronic expansion valve for controlling the on-off of refrigerant; the electronic expansion valve comprises a valve body, a shell, a driving part, a valve needle, a valve seat, an outlet pipe, a top abutting piece, a heating element, an inlet, and an outlet; wherein the valve needle comprises a needle head, a rod part, an extension rod, a first lifting part, and a second lifting part;

[0042] The valve body is provided with a shell above, the shell is provided with a driving part inside, the driving part can drive the up-down movement of the valve needle, the valve body is provided with the valve seat inside, the valve seat is provided with a seat hole inside, the needle head of the valve needle can move to block the seat hole, the valve body is provided with an inlet on the side, the valve body is provided with the outlet below, the seat hole is communicated with the outlet;

[0043] The outlet pipe is connected to the lower end of the valve seat, the lower end of the valve seat is connected with two top abutting pieces, the two top abutting pieces are located in the outlet pipe, the upper end of the rod part penetrates into the shell through the valve body, the lower end of the rod part is provided with the needle head, the lower end of the needle head is connected with the extension rod, the extension rod penetrates into the outlet pipe, the lower end of the extension rod is provided with the first lifting part, the second lifting part is further connected to the extension rod above the first lifting part; the outer wall of the outlet pipe is provided with the heating element;

[0044] The first lifting part comprises a first supporting rod and a first horizontal rod, and the second lifting part comprises a second supporting rod and a second horizontal rod; the first supporting rod and the second supporting rod are separated by 180 degrees in the circumferential direction; when the needle head does not block the seat hole after the air conditioner is turned on, the ice block is lifted together with the extension rod when the valve needle is lifted due to the ice block being frozen into a whole, the ice block is blocked by the top abutting piece during the movement and thus cannot continue to be lifted, the valve needle cannot complete the lifting, the position sensor does not transmit the information of the completed stroke of the valve needle to the controller within a first specified time, the controller controls the heating element to start heating, the position sensor transmits the information to the controller after the ice block is melted and the valve needle completes the lifting stroke, the controller controls the heating element to stop heating; when the valve needle still does not complete the lifting stroke after the heating element heats for a second specified time, the air conditioner stops running.

[0045] As shown in the figure: the needle head is a frustum. The needle head comprises a large-diameter end and a small-diameter end. The diameter of the large-diameter end is smaller than the diameter of the rod part. The diameter of the small-diameter end is larger than the diameter of the extension rod. The middle part of the first horizontal rod is connected to the extension rod through the first supporting rod. The middle part of the second horizontal rod is connected to the extension rod through the second supporting rod. The lower end of the valve body comprises a convex ring part. The inner wall of the convex ring part is attached to the outer wall of the outlet pipe. A transition surface is arranged between the needle head and the rod part.

[0046] The controller comprises a common automobile central processor or an emerging MCU, PLC, etc. The power module can be a conventional automobile battery.

[0047] Optionally,Figure 7 The electrical control scheme is shown as a specific implementation of a model: the system is centered on a master control module, which is connected to a drive module control board through CAN communication, the master +24V power supply input drives the module, the master control module controls the drive module mos switch according to external requirements through can communication instructions, and the drive module control board uploads the state signal, current signal, voltage signal and box temperature signal to the master control module in real time, and the master control module cup is processed and uploaded to the upper computer through the can bus. The master control board uses a Yateli 32-bit high-performance AT32F407VGT7 microcontroller with a main frequency of 240Mhz, which realizes internal and external communication functions through 2-way can interface, and real-time acquisition of external input information and control of output fault LED lamp. The drive control board uses a Yateli 32-bit AT32F413CBT7 microcontroller with a main frequency of 200Mhz, which acquires current, voltage and temperature signals, processes them through the MCU, and protects the system in real time. And through the can bus, it receives the master control board signal in real time, controls the mos tube to open or shut off.

[0048] Of course, the icing condition of ice blockage is not necessarily as Figure 4 described, but Figure 4 the ice blockage condition described is relatively common; another situation is that when ice blockage occurs and the user operates to lift the valve needle, because the extension rod and the ice block are frozen into a whole, the ice block and the outlet pipe are also frozen into a whole, and the lifting force cannot overcome the connection between the ice block and the outlet pipe, so the valve needle cannot be lifted at all; At this time, the position sensor also does not transmit the information of the valve needle completing the stroke to the controller within the first specified time, so the subsequent working procedure is the same as above. The remaining cases include, the volume of ice blockage is small and has not yet formed, etc., which are not discussed one by one, and the present application is dedicated to solving the problem of a common situation.

[0049] The above detailed description is a specific description of the feasible embodiments of the present application, and this embodiment is not used to limit the patent scope of the present application. Any equivalent implementation or change without departing from the present application shall be included in the patent scope of the present application.

Claims

1. An intelligent DC distribution system, characterized by: The vehicle comprises a body, which comprises a front portion and an interior space, and the interior space comprises a first space, a second space, and a third space from front to back; a power module, an air conditioner, and a controller are provided in the front portion of the vehicle, the power module is used to distribute direct current to the air conditioner, the controller, and the electrical cabinet, and the electrical cabinet is used to control the power supply to the power-consuming modules, the power-consuming modules comprising an interactive module, a fax printer and scanner all-in-one, a shredder, and a communication radio, the interactive module comprising an input module, a display screen, an indicator light, and an interface; the interface is connected to the controller via a cable, and the controller outputs a control signal to the power module, thereby controlling the power supply of the air conditioner and the electrical cabinet to the power supply by the power module; the first space is provided with an interactive module, a fax printer and scanner all-in-one, a shredder, a main driver's seat, and a co-driver's seat, the second space is provided with a third seat and a fourth seat, and the third space is provided with an electrical cabinet and a communication radio; the electrical cabinet is provided with a switch module for controlling the power supply to the power-consuming modules; The air conditioner is provided with an electronic expansion valve for controlling the flow of refrigerant; the electronic expansion valve comprises a valve body, a shell, a driving part, a valve needle, a valve seat, an outlet pipe, a stopper, a heating element, an inlet, and an outlet; the valve needle comprises a needle head, a rod, an extension rod, a first lifting part, and a second lifting part; A housing is provided above the valve body, a driving part is provided in the housing, the driving part can drive the valve needle to move up and down, the valve body is provided with the valve seat, the valve seat is provided with a seat hole, the needle head of the valve needle can move to block the seat hole, an inlet is provided on the side of the valve body, the outlet is provided below the valve body, and the seat hole is connected to the outlet; The upper end of the outlet pipe is connected to the lower end of the valve seat, and the lower end of the valve seat is connected to two abutments, which are located in the outlet pipe. The upper end of the rod passes through the valve body and extends into the shell, and the lower end of the rod is provided with a needle, and the lower end of the needle is connected to the extension rod, and the extension rod extends into the outlet pipe. The lower end of the extension rod is provided with a first lifting portion, and above the first lifting portion, the extension rod is also connected to a second lifting portion; the outer wall of the outlet pipe is provided with a heating element; The first lifting part includes a first support rod and a first cross rod, and the second lifting part includes a second support rod and a second cross rod; the first support rod and the second support rod are 180 degrees apart in the circumferential direction; after the air conditioner is turned on, the needle head does not block the seat hole. When ice blockage occurs and the user operates to lift the valve needle, the extension rod and the ice cube are frozen into a whole, so the ice cube is lifted as the extension rod is lifted. During the movement of the ice cube, it is blocked by the push-button and cannot continue to lift, so that the valve needle cannot complete the lifting. If the position sensor fails to transmit the information that the valve needle completes the stroke within the first specified time to the controller, the controller controls the heating element to start heating. When the ice cube melts and the valve needle completes the lifting stroke, the position sensor transmits information to the controller, and the controller controls the heating element to stop heating. When the valve needle still does not complete the lifting stroke after the heating element has been heated for the second specified time, the air conditioner stops running.

2. The intelligent DC distribution system according to claim 1, characterized in that: The needle head is in a frustum shape.

3. The intelligent DC distribution system according to claim 2, characterized in that: The needle includes a large-diameter end and a small-diameter end.

4. The intelligent DC distribution system according to claim 3, characterized in that: The diameter of the large-diameter end is smaller than the diameter of the rod portion.

5. The intelligent DC distribution system according to claim 4, characterized in that: The diameter of the small-diameter end is larger than the diameter of the extension rod.

6. The intelligent DC distribution system according to claim 1, characterized in that: The middle portion of the first crossbar is connected to the extension rod through a first support rod.

7. The intelligent DC distribution system according to claim 6, characterized in that: The middle portion of the second crossbar is connected to the extension rod through a second support rod.

8. The intelligent DC distribution system according to claim 1, characterized in that: The lower end of the valve body includes a convex ring portion.

9. The intelligent DC distribution system according to claim 8, characterized in that: The inner wall of the convex ring portion fits the outer wall of the outlet pipe.

10. The intelligent DC distribution system according to claim 1, characterized in that: A transition surface is provided between the needle head and the rod portion.

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