Heat recovery device of charging pile and charging pile

Abstract

The utility model discloses a heat recovery device of a charging pile and the charging pile. The heat recovery device of the charging pile comprises a hot air inlet, a hot air outlet, a heat collection container, a heat exchange structure and a control system. The hot air inlet is communicated with an air outlet of a heat dissipation system of the power unit, and the hot air outlet is communicated with the interior of the cabinet. The heat collecting container is communicated with the hot air inlet; the heat collection container is used for collecting heat of heat loss of the heat dissipation system; the heat exchange structure is communicated with the heat collection container through a pipeline, a phase change material is arranged in the heat exchange structure, heat collected by the heat collection container is converted into hot air through phase change of the phase change material, and the hot air is blown into the cabinet through the hot air outlet; the control system is electrically connected with the heat collection container and the heat exchange structure; the opening time of the heat collection container and the heat exchange structure is controlled. The structure of the charging pile heat recovery device is simplified, and the safety of the heat recovery device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging systems, and in particular to a heat recovery device for a charging pile and a charging pile. Background Art

[0002] With the increasing popularity of electric vehicles, the number of electric vehicles is increasing, and the supporting charging facilities are gradually improving. When charging piles charge vehicles, a large amount of heat is generated due to the conversion of current and voltage by the power unit. This heat is called the waste heat of the charging pile. If this heat cannot be recovered, it will inevitably cause energy waste.

[0003] The prior art usually installs a generator and energy storage device inside the cabinet of the charging pile, uses the waste heat of the charging pile to drive the generator to generate electricity and stores energy through the energy storage device. This setting method of adding a generator and energy storage device inside the charging pile, on the one hand, has a complex structure and high cost; on the other hand, there is a risk of leakage during the power generation process of the generator, and there is a fire hazard in the energy storage device, so the safety is poor. Utility Model Content

[0004] The utility model provides a heat recovery device for a charging pile and a charging pile, so as to solve the problems that the heat recovery device for the charging pile has a complex structure and poor safety.

[0005] According to one aspect of the utility model, a heat recovery device for a charging pile is provided, comprising:

[0006] A hot air inlet and a hot air outlet; the hot air inlet is connected to the air outlet of the heat dissipation system of the power unit, and the hot air outlet is connected to the inside of the cabinet;

[0007] A heat collection container, the heat collection container is in communication with the hot air inlet; the heat collection container is used to collect heat loss from the heat dissipation system;

[0008] A heat exchange structure, wherein the heat exchange structure is connected to the heat collection container through a pipeline, and a phase change material is arranged in the heat exchange structure; the heat exchange structure converts the heat collected by the heat collection container into hot air through the phase change of the phase change material, and blows the hot air into the interior of the cabinet through the hot air outlet;

[0009] A control system, wherein the control system is electrically connected to the heat collection container, and the control system is electrically connected to the heat exchange structure; the control system is used to control the start timing of the heat collection container and the heat exchange structure.

[0010] Optionally, the heat recovery device of the charging pile further includes:

[0011] An air driving mechanism is arranged on the connecting pipeline between the heat collection container and the heat exchange structure; the air driving mechanism is controlled by the control system to drive the air in the heat collection container to be stored in the heat exchange structure.

[0012] Optionally, the air drive mechanism comprises an air pump.

[0013] Optionally, the heat recovery device of the charging pile further includes:

[0014] A first temperature detection probe, wherein the first temperature detection probe is arranged at the hot air inlet; the first temperature detection probe is electrically connected to the control system; and the control system controls the opening and closing of the heat collection container according to the temperature fed back by the first temperature detection probe.

[0015] Optionally, the heat collection container comprises:

[0016] A container body and a valve, wherein the valve is arranged between the container body and the hot air inlet; the valve is electrically connected to the control system; and the control system controls the opening and closing of the heat collection container by controlling the valve.

[0017] Optionally, the heat recovery device of the charging pile further includes:

[0018] A second temperature detection probe, the second temperature detection probe is arranged at the hot air outlet; the second temperature detection probe is electrically connected to the control system; the control system controls the working state of the heat exchange structure according to the temperature fed back by the second temperature detection probe.

[0019] Optionally, the heat collection container comprises a heat collection tank;

[0020] And / or, the heat exchange structure includes a phase change material box.

[0021] Optionally, the heat recovery device of the charging pile further includes:

[0022] A spoiler fan is arranged in the cabinet; the spoiler fan is electrically connected to the control system; the spoiler fan is used to spoil the hot air from the hot air outlet under the control of the control system.

[0023] According to another aspect of the present invention, a charging pile is provided, comprising: a power unit, a heat dissipation system of the power unit, and a heat recovery device as described in any of the above embodiments.

[0024] The embodiment of the utility model is provided with a hot air inlet, a hot air outlet, a heat collection container, a heat exchange structure and a control system. The heat collection container and the heat exchange structure can perform two-stage heat collection and storage, and when the temperature inside the cabinet is low, the stored heat is released through the heat exchange structure to ensure the normal operation of various components inside the cabinet. In summary, the embodiment of the utility model can reduce the waste of heat loss inside the charging pile, and by directly collecting and storing heat, release heat at low temperatures to increase the temperature of the environment inside the cabinet.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a structural schematic diagram of a heat recovery device for a charging pile provided according to an embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of another heat recovery device for a charging pile provided according to an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of another heat recovery device for a charging pile provided according to an embodiment of the utility model;

[0030] Figure 4 It is a structural schematic diagram of another heat recovery device for a charging pile provided according to an embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a charging pile provided according to an embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] The present invention provides a heat recovery device for a charging pile. Figure 1 A schematic diagram of a heat recovery device for a charging pile provided by an embodiment of the utility model, referring to Figure 1 The device includes: a hot air inlet 1, a hot air outlet 2, a heat collection container 3, a heat exchange structure 4 and a control system 5; the hot air inlet 1 is connected to the air outlet of the heat dissipation system of the power unit, and the hot air outlet 2 is connected to the inside of the cabinet 10. The heat collection container 3 is connected to the hot air inlet 1; the heat collection container 3 is used to collect heat from the heat loss of the heat dissipation system. The heat exchange structure 4 is connected to the heat collection container 3 through a pipeline, and a phase change material is arranged in the heat exchange structure 4; the heat exchange structure 4 converts the heat collected by the heat collection container 3 into hot air through the phase change of the phase change material, and blows it into the inside of the cabinet 10 through the hot air outlet 2. The control system 5 is electrically connected to the heat collection container 3, and the control system 5 is electrically connected to the heat exchange structure 4; the control system 5 is used to control the opening timing of the heat collection container 3 and the heat exchange structure 4.

[0035] When the charging pile charges the vehicle, the power unit needs to convert the input voltage and input current of the charging pile into the voltage and current required by the charging vehicle. For example, in a DC charging pile, the charging vehicle transmits the requested voltage and requested current to the charging pile according to the battery requirements, and the charging pile converts the input AC power into DC power and outputs it to the charging vehicle according to the vehicle requirements. In the process of AC-DC conversion, a large amount of heat is generated and dissipated through the heat dissipation system.

[0036] The hot air inlet 1 is connected to the air outlet of the heat dissipation system of the power unit so that the heat collection container 3 can absorb the heat generated inside the charging pile. The heat collection container 3 is controlled by the control system 5. For example, when the internal heat dissipation of the cabinet 10 of the charging pile is relatively large and the charging pile has a heat recovery demand, the control system 5 controls the heat collection container 3 to open, and the heat collection container 3 receives the hot air input from the hot air inlet 1 for heat collection. Further, when the heat collected by the heat collection container 3 reaches a certain value, the control system 5 turns on the heat exchange structure 4, and the heat collection container 3 inputs the collected heat into the heat exchange structure 4 through the pipeline. The phase change material in the heat exchange structure 4 absorbs heat and changes from solid to liquid for energy storage. In this process, the heat exchange structure 4 absorbs a large amount of heat, which is beneficial to the heat dissipation of the cabinet 10, so that its internal temperature is within a suitable temperature range.

[0037] In some cases, when the ambient temperature outside the charging pile is low, the power unit and other equipment in the cabinet 10 cannot run at full power due to the low temperature. At this time, the cabinet 10 can be heated up by the heat recovery device. For example, in this process, the phase change material can be transformed from liquid to solid, and a large amount of heat is generated. The heat is blown into the cabinet 10 through the hot air outlet 2 to heat the cabinet 10, so that the inside of the cabinet 10 quickly reaches the temperature condition for normal operation of the charging pile.

[0038] The heat recovery device provided by the embodiment of the utility model includes a hot air inlet 1, a hot air outlet 2, a heat collection container 3, a heat exchange structure 4 and a control system 5. Only through the heat collection container 3 and the heat exchange structure 4, two-stage heat collection and storage can be performed. This setting method has a simple structure and low cost. When the temperature inside the cabinet 10 is low, the stored heat is released through the heat exchange structure 4 to ensure the normal operation of each device inside the cabinet 10. The performance of the heat collection container 3 and the heat exchange structure 4 is stable and reliable, and the failure rate is low. In summary, the heat recovery device provided by the embodiment of the utility model has a simple structure, does not need to set up power generation and energy storage equipment such as generators and batteries, will not cause safety hazards such as leakage and fire, and operates stably and reliably.

[0039] It should be noted that the hot air inlet 1 and the hot air outlet 2 of the heat recovery device are both connected to the inside of the cabinet 10, and other devices of the heat recovery device can be arranged inside the cabinet 10 (such as Figure 1 As shown), it can also be arranged outside the cabinet 10, or it can be partially arranged inside the cabinet 10 and partially arranged outside the cabinet 10, which is not limited in the present utility model.

[0040] Figure 2 A schematic diagram of the structure of another heat recovery device for a charging pile provided in an embodiment of the utility model, referring to Figure 2 On the basis of the above embodiments, optionally, the heat recovery device of the charging pile further includes: an air driving mechanism 6, which is arranged on the connecting pipeline between the heat collection container 3 and the heat exchange structure 4; the air driving mechanism 6 is controlled by the control system 5 to drive the air in the heat collection container 3 to be stored in the heat exchange structure 4.

[0041] Among them, the heat collection container 3 can be a heat collection tank, the heat collection container 3 can store hot air, and has a certain gas bearing pressure, and can store a certain amount of hot air. When the heat stored in the heat collection container 3 reaches a preset value, the control system 5 controls the air drive mechanism 6 to open, and the air drive mechanism 6 drives the hot air stored in the heat collection container 3 to be input into the heat exchange structure 4, and the heat exchange structure 4 stores the heat. By setting the air drive mechanism 6, the two-level control of the residual heat of the charging pile through the heat collection container 3 and the heat exchange structure 4 is realized. Specifically, the heat collection container 3 can store hot air alone, the heat exchange structure 4 can receive the hot air of the heat collection container 3 for heat storage, or the heat collection container 3 and the heat exchange structure 4 can store hot air together. In addition, in the process of transmitting the hot air in the heat collection container 3 to the heat exchange structure 4, the air drive mechanism 6 can enable the hot air in the heat collection container 3 to be quickly input into the heat exchange structure 4, thereby improving the transmission efficiency and reducing the heat loss on the connecting pipeline.

[0042] Based on the above embodiments, optionally, the air drive mechanism 6 includes an air pump.

[0043] The air pump can increase the transmission speed of hot air from the heat collection container 3 to the heat exchange structure 4. The air pump is turned on and off by the control system 5. When the heat stored in the heat collection container 3 reaches a preset value, the control system 5 controls the air pump to turn on, and the air pump drives the hot air stored in the heat collection container 3 to be input into the heat exchange structure 4, and the heat exchange structure 4 stores the heat.

[0044] Figure 3 A schematic diagram of a heat recovery device for a charging pile according to another embodiment of the present invention is provided. Figure 3 On the basis of the above embodiments, optionally, the heat recovery device of the charging pile further includes: a first temperature detection probe 7, which is arranged at the hot air inlet 1; the first temperature detection probe 7 is electrically connected to the control system 5; the control system 5 controls the opening and closing of the heat collection container 3 according to the temperature feedback from the first temperature detection probe 7.

[0045] Among them, the hot air inlet 1 is connected to the air outlet of the heat dissipation system of the power unit, and the first temperature detection probe 7 can be used to detect the temperature of the hot air inlet 1 and generate a temperature signal. The control system 5 determines whether the temperature of the hot air inlet 1 meets the temperature requirement by receiving the temperature signal of the first temperature detection probe 7, thereby controlling the opening and closing of the heat collection container 3. Specifically, when the temperature detected by the first temperature detection probe 7 is low, the control system 5 controls the heat collection container 3 to be closed, and the hot air inlet 1 cannot input air into the heat collection container 3 at this time; when the temperature detected by the first temperature detection probe 7 is high, the control system 5 controls the heat collection container 3 to be opened, and the hot air inlet 1 inputs air into the heat collection container 3 at this time, and the heat collection container 3 collects hot air.

[0046] The temperature threshold for opening and closing the heat collection container 3 can be set by the user. For example, the temperature threshold can be set to 40 degrees Celsius. When the air temperature detected by the first temperature detection probe 7 is greater than 40 degrees Celsius, the control system 5 controls the heat collection container 3 to open, and the heat collection container 3 starts to collect heat. When the air temperature detected by the first temperature detection probe 7 is less than or equal to 40 degrees Celsius, the control system 5 controls the heat collection container 3 to close, and the heat collection container 3 does not collect heat.

[0047] Continue to refer Figure 3 On the basis of the above embodiments, optionally, the heat recovery device of the charging pile further includes: a second temperature detection probe 8, which is arranged at the hot air outlet 2; the second temperature detection probe 8 is electrically connected to the control system 5; the control system 5 controls the working state of the heat exchange structure 4 according to the temperature feedback from the second temperature detection probe 8.

[0048] Among them, the second temperature detection probe 8 is arranged at the hot air outlet 2, which can detect the temperature state of the hot air outlet 2 and generate a temperature signal. The control system 5 controls the operating power of the heat exchange structure 4 by receiving the temperature signal of the second temperature detection probe 8. When the temperature detected by the second temperature detection probe 8 is low, the control system 5 controls the heat exchange structure 4 to start working or increase the operating power. When the temperature detected by the second temperature detection probe 8 is high, the control system 5 controls the heat exchange structure 4 to reduce the operating power or stop working. Exemplarily, the critical temperature between high temperature and low temperature can be set to 0 degrees Celsius. When the temperature detected by the second temperature detection probe 8 is less than 0 degrees Celsius, it means that the temperature is too low at this moment. The control system 5 controls the heat exchange structure 4 to perform heat conversion, and the phase change material releases heat and changes from liquid to solid. The heat is blown into the cabinet 10 through the hot air outlet 2 for heating, so that each device inside the cabinet 10 reaches the normal operating temperature.

[0049] Figure 4 A schematic diagram of a heat recovery device for a charging pile according to another embodiment of the present invention is provided. Figure 4 Based on the above embodiments, optionally, the heat collection container 3 includes:

[0050] The container body 32 and the valve 31 are arranged between the container body 32 and the hot air inlet 1; the valve 31 is electrically connected to the control system 5; the control system 5 controls the opening and closing of the heat collection container 3 by controlling the valve 31.

[0051] The valve 31 is connected between the container body 32 and the hot air inlet 1, and is used to control the connection between the hot air and the container body 32. The valve 31 is controlled by the control system 5. For example, when the air temperature detected by the first temperature detection probe 7 is greater than the set value, the control system 5 controls the valve 31 to open, and the container body 32 starts to collect heat. When the air temperature detected by the first temperature detection probe 7 is less than or equal to the set value, the control system 5 controls the valve 31 to close, and the container body 32 does not collect heat.

[0052] On the basis of the above embodiments, optionally, the heat collection container 3 includes a heat collection tank; and / or the heat exchange structure 4 includes a phase change material box.

[0053] Among them, the heat collection tank is a gas storage tank for collecting hot air, which can withstand a large pressure and is used to directly store hot air. The heat exchange structure 4 includes a phase change material box, and the phase change material box has a phase change material. Exemplarily, the phase change material box can be a 38-degree Celsius phase change material box. When the temperature of the gas input into the phase change material box is higher than 38 degrees Celsius, the phase change material absorbs heat and converts from solid to liquid to store heat. When the phase change material box needs to release heat, the phase change material converts from liquid to solid and releases heat.

[0054] Continue to refer Figure 4 On the basis of the above embodiments, optionally, the heat recovery device of the charging pile further includes: a spoiler fan 9, which is arranged in the cabinet 10; the spoiler fan 9 is electrically connected to the control system 5; the spoiler fan 9 is used to spoil the hot air at the hot air outlet 2 under the control of the control system 5.

[0055] Among them, because the interior of the cabinet 10 is in a closed state and there is no air circulation, the heat emitted by the hot air outlet 2 may gather the hot air near the hot air outlet 2 and cannot be diffused to the entire cabinet 10, causing the overall temperature rise inside the cabinet 10 to be uneven. In the embodiment of the utility model, through the setting of the spoiler fan 9, when the heat exchange structure 4 releases heat, the control system 5 controls the spoiler fan 9 to turn on, and the spoiler fan 9 turbules the hot air at the hot air outlet 2, so that the hot air is evenly diffused to the interior of the cabinet 10 of the entire charging pile, so that each device inside the cabinet 10 reaches the normal operating temperature, achieving the effect of rapid heating.

[0056] The utility model provides a charging pile. Figure 5 is a schematic diagram of a charging pile according to an embodiment of the utility model, referring to Figure 5 The charging pile includes: a power unit 11, a heat dissipation system 12 of the power unit, and a heat recovery device provided by any embodiment of the utility model. The power unit 11 is used to convert the input voltage and current of the charging pile into the voltage and current required by the electric vehicle, and the heat dissipation system 12 of the power unit is used to cool the power unit 11. Because it includes the heat recovery device provided by any embodiment of the utility model, it also has the same beneficial effects, which will not be repeated here.

[0057] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0058] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A heat recovery device for a charging pile, characterized in that: include: Hot air inlet and hot air outlet; The hot air inlet is connected to the air outlet of the heat dissipation system of the power unit, and the hot air outlet is connected to the inside of the cabinet; A heat collection container, the heat collection container is in communication with the hot air inlet; the heat collection container is used to collect heat loss from the heat dissipation system; A heat exchange structure, wherein the heat exchange structure is connected to the heat collection container through a pipeline, and a phase change material is arranged in the heat exchange structure; the heat exchange structure converts the heat collected by the heat collection container into hot air through the phase change of the phase change material, and blows the hot air into the interior of the cabinet through the hot air outlet; A control system, wherein the control system is electrically connected to the heat collection container, and the control system is electrically connected to the heat exchange structure; the control system is used to control the start timing of the heat collection container and the heat exchange structure.

2. The heat recovery device for a charging pile according to claim 1, characterized in that: Also includes: An air driving mechanism, the air driving mechanism being arranged on a connecting pipe between the heat collection container and the heat exchange structure; The air driving mechanism is controlled by the control system to drive the air in the heat collection container to be stored in the heat exchange structure.

3. The heat recovery device for a charging pile according to claim 2, characterized in that: The air drive mechanism includes an air pump.

4. The heat recovery device for a charging pile according to claim 1, characterized in that: Also includes: A first temperature detection probe, wherein the first temperature detection probe is arranged at the hot air inlet; The first temperature detection probe is electrically connected to the control system; The control system controls the opening and closing of the heat collection container according to the temperature fed back by the first temperature detection probe.

5. The heat recovery device for a charging pile according to claim 4, characterized in that: The heat collection container comprises: A container body and a valve, wherein the valve is arranged between the container body and the hot air inlet; the valve is electrically connected to the control system; and the control system controls the opening and closing of the heat collection container by controlling the valve.

6. The heat recovery device for a charging pile according to claim 1, characterized in that: Also includes: A second temperature detection probe, wherein the second temperature detection probe is arranged at the hot air outlet; The second temperature detection probe is electrically connected to the control system; The control system controls the working state of the heat exchange structure according to the temperature fed back by the second temperature detection probe.

7. The heat recovery device for a charging pile according to claim 1, characterized in that: The heat collection container comprises a heat collection tank; And / or, the heat exchange structure includes a phase change material box.

8. The heat recovery device for a charging pile according to claim 1, characterized in that: Also includes: A spoiler fan is arranged in the cabinet; the spoiler fan is electrically connected to the control system; the spoiler fan is used to spoil the hot air from the hot air outlet under the control of the control system.

9. A charging pile, characterized in that: include: A power unit, a heat dissipation system of the power unit and a heat recovery device as claimed in any one of claims 1 to 8.

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