Refrigerating unit and energy storage device

Abstract

The utility model belongs to the technical field of energy storage equipment, and discloses a refrigerating unit and an energy storage device. The refrigerating unit comprises a condenser and a coaxial pipe, the condenser comprises a first collecting pipe, a second collecting pipe and a radiating pipe, the first collecting pipe and the second collecting pipe are arranged in parallel, the radiating pipe is communicated between the first collecting pipe and the second collecting pipe, and the radiating pipe is arranged to be a bent pipe. The coaxial pipe comprises an inner pipe and an outer pipe, at least part of the inner pipe is located in the outer pipe, one of the inner pipe and the outer pipe is communicated with the water outlet of the condenser, and cooling gas is introduced into the other one of the inner pipe and the outer pipe. And after flowing out of the condenser, the air enters the outer pipe of the coaxial pipe and can exchange heat with the cooling air in the inner pipe of the coaxial pipe again. The refrigerating unit has a good cooling effect, the space in the energy storage device can be fully utilized, the refrigerating unit is installed in the gap between the battery pack and the case, and the utilization rate of the space in the energy storage device is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage device technical field especially, relates to a refrigerating unit and energy storage device. BACKGROUND

[0002] With the large-scale application of renewable energy, its intermittency and volatility provide market opportunities for the development of large-scale energy storage systems. In the future, large-scale energy storage systems not only can realize new energy power generation grid connection and excess energy storage, but also can play a positive role in peak load shifting and energy saving, improve the safety and reliability of power systems, and have important social and economic benefits.

[0003] Generally, in the energy storage device, the refrigerating unit is responsible for cooling when the battery pack is charging and discharging, and the heat is dissipated through the condenser through the medium. In recent years, with the increasing demand for endurance of energy storage devices, the volume and number of battery packs have also gradually increased, and the space inside the energy storage device is limited, therefore, there is an increasingly high requirement for the heat dissipation efficiency of the refrigerating unit.

[0004] Therefore, there is an urgent need for a refrigerating unit and energy storage device to solve the above problems. INVENTION CONTENTS

[0005] One purpose of the utility model is to provide a refrigerating unit, which is compact in structure, saves installation space, has large heat exchange area and high refrigeration efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A refrigerating unit is provided, comprising:

[0008] A condenser, the condenser comprises a first header, a second header and a heat dissipation pipe, the first header and the second header are arranged in parallel, the heat dissipation pipe is communicated between the first header and the second header, and the heat dissipation pipe is arranged in the form of a bent pipe.

[0009] A coaxial pipe, the coaxial pipe comprises an inner pipe and an outer pipe, at least part of the inner pipe is located in the outer pipe, one of the inner pipe and the outer pipe is communicated with the water outlet of the condenser, and the other is communicated with cooling gas.

[0010] As an optional solution of the refrigerating unit, a plurality of heat dissipation pipes are arranged, the plurality of heat dissipation pipes are arranged at intervals, and the condenser further comprises a fin, the fin is connected between two adjacent heat dissipation pipes.

[0011] As an optional solution of the refrigerating unit, a plurality of heat dissipation channels are arranged in the heat dissipation pipe, and the plurality of heat dissipation channels are communicated with the first header and the second header.

[0012] As an optional solution of the refrigeration unit, the first header pipe comprises a first main pipe, a water inlet pipe and a water outlet pipe, the heat dissipation pipe is communicated with the first main pipe, and the water inlet pipe and the water outlet pipe are connected to two ends of the first main pipe respectively.

[0013] As an optional solution of the refrigeration unit, the first header pipe further comprises a first partition plate, and the first partition plate is located between the water inlet pipe and the water outlet pipe and is closedly connected in the first main pipe.

[0014] As an optional solution of the refrigeration unit, the second header pipe comprises a second main pipe and a second partition plate, the heat dissipation pipe is communicated with the second main pipe, and the second partition plate is closedly connected in the second main pipe.

[0015] As an optional solution of the refrigeration unit, the refrigeration unit further comprises a heat exchanger, one of the inner pipe and the outer pipe is communicated with a water outlet of the condenser, and the other is communicated with a rear end of the heat exchanger.

[0016] As an optional solution of the refrigeration unit, the refrigeration unit further comprises a fan, and the fan is arranged correspondingly with the condenser.

[0017] Another purpose of the utility model lies in providing an energy storage device, which can expand refrigeration area and ensure heat dissipation efficiency under the condition that the overall space is unchanged.

[0018] To achieve the purpose, the utility model adopts the following technical scheme:

[0019] The utility model provides an energy storage device, which comprises a case, a battery pack and the above refrigeration unit, and the battery pack and the refrigeration unit are fixed in the case.

[0020] As an optional solution of the energy storage device, the energy storage device is provided with a plurality of groups of refrigeration units, and the groups of refrigeration units are communicated with each other.

[0021] The utility model has the advantages of:

[0022] The utility model provides a refrigeration unit, the heat dissipation pipe in the condenser is arranged as a bend pipe, under the same installation space, the space in the energy storage device can be fully utilized, the refrigeration unit is installed in the gap between the battery pack and the case, the utilization efficiency of the space in the energy storage device is improved, the installation space is saved, meanwhile, the arrangement of the bend pipe can also prolong the flow path of refrigerant in the condenser, increase the heat exchange area of the condenser, and then improve the heat exchange efficiency of the refrigeration unit.

[0023] The energy storage device can improve the refrigeration effect of the refrigerating unit without increasing the space occupied by the whole energy storage device, can be applied to installation and use of large-volume battery packs, meets the refrigeration requirement of the energy storage device, and is favorable for improving the overall efficiency of the energy storage device. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a condenser structure schematic view of the refrigerating unit provided by the utility model;

[0025] Fig. 2 is a coaxial pipe structure schematic view of the refrigerating unit provided by the utility model;

[0026] Fig. 3 is a structure schematic view of the energy storage device provided by the utility model.

[0027] In the drawings:

[0028] 100, condenser; 110, first header; 111, first main pipe; 112, water inlet pipe; 113, water outlet pipe; 114, first partition plate; 120, second header; 121, second main pipe; 122, second partition plate; 130, heat dissipation pipe; 140, fin;

[0029] 200, coaxial pipe; 210, inner pipe; 220, outer pipe;

[0030] 300, case; 310, first space; 320, second space;

[0031] 400, fan. DETAILED DESCRIPTION

[0032] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0033] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or be integrated, can be mechanically connected, or be electrically connected, can be directly connected, or be indirectly connected through intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is on, above and on of second feature includes that first feature is directly above and obliquely above of second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature is under, below and under of second feature includes that first feature is directly below and obliquely below of second feature, or only indicates that horizontal height of first feature is less than second feature.

[0035] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" refer to the orientation or position shown in the drawings, which are for convenience in description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the utility model. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0036] As shown in Figs. 1 to 3 The refrigerating unit of the embodiment includes a condenser 100 and a coaxial pipe 200. The condenser 100 includes a first header pipe 110, a second header pipe 120, and a heat dissipation pipe 130. The first header pipe 110 and the second header pipe 120 are arranged in parallel. The heat dissipation pipe 130 is connected between the first header pipe 110 and the second header pipe 120. The heat dissipation pipe 130 is arranged as a bent pipe. The coaxial pipe 200 includes an inner pipe 210 and an outer pipe 220. At least part of the inner pipe 210 is located in the outer pipe 220. One of the inner pipe 210 and the outer pipe 220 is connected to a water outlet of the condenser 100. The other one is connected to a cooling gas. In the embodiment, the inner pipe 210 is used to connect to the cooling gas. The outer pipe 220 is connected to the water outlet of the condenser 100.

[0037] Based on the above design, the refrigerating unit of the embodiment sets the heat dissipation pipe 130 in the condenser 100 as a bent pipe. Under the same installation space, the space in the energy storage device can be fully utilized. The refrigerating unit is installed in the gap between the battery pack and the case 300. The utilization efficiency of the space in the energy storage device is improved. The installation space is saved. At the same time, the arrangement of the bent pipe can also prolong the flow path of the refrigerant in the condenser 100. The heat exchange area of the condenser 100 is increased. The heat exchange efficiency of the refrigerating unit is further improved. After the refrigerant is cooled, it flows out of the condenser 100 and enters the outer pipe 220 of the coaxial pipe 200. The refrigerant can be heat-exchanged with the cooling gas in the inner pipe 210 of the coaxial pipe 200 again. The cooling of the refrigerant is further realized. The cooling effect of the refrigerating unit is improved.

[0038] Further, the heat dissipation pipes 130 are arranged in plurality and are arranged at intervals, and the condenser 100 further comprises fins 140 connected between two adjacent heat dissipation pipes 130. The heat of the refrigerant is transferred to the fins 140 through the heat dissipation pipes 130, so that the heat dissipation area of the condenser 100 is enlarged and the heat dissipation effect of the condenser 100 is improved.

[0039] Optionally, a plurality of heat dissipation channels can be arranged in the heat dissipation pipes 130, and the plurality of heat dissipation channels are communicated with the first header pipe 110 and the second header pipe 120. By increasing the number of heat dissipation channels, the flow of the refrigerant is improved, which is beneficial to accelerate the heat dissipation speed. For example, the number of heat dissipation channels can be three, four, six, etc.

[0040] In the embodiment, the first header pipe 110 comprises a first main pipe 111, a water inlet pipe 112 and a water outlet pipe 113, the heat dissipation pipes 130 are communicated with the first main pipe 111, and the water inlet pipe 112 and the water outlet pipe 113 are connected to two ends of the first main pipe 111. Connecting the water inlet pipe 112 and the water outlet pipe 113 to the first main pipe 111 can facilitate the installation and communication of the condenser 100 and the coaxial pipe 200, and further save the installation space of the refrigeration unit.

[0041] Further, the first header pipe 110 further comprises a first partition plate 114, and the first partition plate 114 is located between the water inlet pipe 112 and the water outlet pipe 113 and is closed connected in the first main pipe 111. After the refrigerant enters the first main pipe 111 through the water inlet pipe 112, the refrigerant can flow to the second header pipe 120 through part of the heat dissipation pipes 130 under the blocking action of the first partition plate 114, so that the refrigerant can flow in the condenser 100 sufficiently, thereby ensuring the heat dissipation effect of the condenser 100.

[0042] In the embodiment, the first partition plate 114 is arranged in two, the second header pipe 120 comprises a second main pipe 121 and a second partition plate 122, the heat dissipation pipes 130 are communicated with the second main pipe 121, the second partition plate 122 is located between the two first partition plates 114 and is arranged staggered with the two first partition plates 114, and the second partition plate 122 is closed connected in the second main pipe 121. The refrigerant can flow in the plurality of heat dissipation pipes 130, thereby further improving the heat dissipation effect.

[0043] Further, the refrigeration unit further comprises a heat exchanger, one of the inner tube 210 and the outer tube 220 is communicated with the water outlet of the condenser 100, and the other is communicated with the rear end of the heat exchanger, in the embodiment, the inner tube 210 is communicated with the heat exchanger, so that the refrigerant flowing out of the condenser 100 and the low-temperature gas flowing out of the heat exchanger can further exchange heat in the coaxial tube 200, the heat is fully recycled, the condensation temperature is reduced, the supercooling degree is increased, and the overall heat dissipation effect is improved.

[0044] Further, the refrigeration unit further comprises a fan 400, the fan 400 is arranged corresponding to the condenser 100, and the fan 400 can accelerate the air flow speed on the surface of the condenser 100 and improve the heat exchange effect between the condenser 100 and the air.

[0045] The embodiment also provides a storage device, which comprises a cabinet 300, a battery pack and the refrigeration unit, and the battery pack and the refrigeration unit are fixed in the cabinet 300.

[0046] Specifically, the cabinet 300 comprises a first space 310 and a second space 320, the first space 310 is located above the second space 320, the condenser 100 is arranged in the first space 310, the coaxial tube 200 is arranged in the second space 320, and the fan 400 is arranged on the top wall of the cabinet 300, so that the storage device is compact in structure and the occupied space is reduced.

[0047] Optionally, the storage device is provided with a plurality of refrigeration units, and the plurality of refrigeration units are communicated with each other, so that the refrigeration effect of the storage device is ensured.

[0048] Obviously, the above embodiment of the utility model is only for the purpose of clear illustration, and is not a limitation on the embodiment of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A refrigeration unit, characterized in that, include: A condenser (100) includes a first manifold (110), a second manifold (120), and a heat dissipation pipe (130). The first manifold (110) and the second manifold (120) are arranged in parallel. The heat dissipation pipe (130) is connected between the first manifold (110) and the second manifold (120). The heat dissipation pipe (130) is configured as a bent pipe. A coaxial tube (200) includes an inner tube (210) and an outer tube (220), at least a portion of the inner tube (210) being located inside the outer tube (220), one of the inner tube (210) and the outer tube (220) being connected to the outlet of the condenser (100), and the other being connected to cooling gas.

2. The refrigeration unit according to claim 1, characterized in that, Multiple heat dissipation pipes (130) are provided, and the multiple heat dissipation pipes (130) are spaced apart from each other. The condenser (100) also includes fins (140), and the fins (140) are connected between two adjacent heat dissipation pipes (130).

3. The refrigeration unit according to claim 1, characterized in that, The heat dissipation pipe (130) is provided with multiple heat dissipation channels, and the multiple heat dissipation channels are all connected to the first manifold (110) and the second manifold (120).

4. The refrigeration unit according to claim 1, characterized in that, The first manifold (110) includes a first main pipeline (111), an inlet pipe (112) and an outlet pipe (113). The heat dissipation pipe (130) is connected to the first main pipeline (111), and the inlet pipe (112) and the outlet pipe (113) are respectively connected to the two ends of the first main pipeline (111).

5. The refrigeration unit according to claim 4, characterized in that, The first manifold (110) also includes a first baffle (114), which is located between the inlet pipe (112) and the outlet pipe (113) and is enclosed within the first main pipeline (111).

6. The refrigeration unit according to claim 1, characterized in that, The second manifold (120) includes a second main pipe (121) and a second partition (122). The heat dissipation pipe (130) is connected to the second main pipe (121), and the second partition (122) is enclosed within the second main pipe (121).

7. The refrigeration unit according to claim 1, characterized in that, The refrigeration unit also includes a heat exchanger, one of the inner tube (210) and the outer tube (220) being connected to the outlet of the condenser (100), and the other being connected to the rear end of the heat exchanger.

8. The refrigeration unit according to claim 1, characterized in that, The refrigeration unit also includes a fan (400), which is correspondingly arranged with the condenser (100).

9. An energy storage device, characterized in that, It includes a chassis (300), a battery pack, and a refrigeration unit as described in any one of claims 1-8, wherein the battery pack and the refrigeration unit are fixed inside the chassis (300).

10. The energy storage device according to claim 9, characterized in that, The energy storage device is equipped with multiple sets of refrigeration units, and the multiple sets of refrigeration units are interconnected.

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