Expansion tank

Abstract

The utility model relates to the technical field of hydrogen fuel cells, and discloses an expansion water tank which comprises a tank body, an end cover, a one-way valve and a deionizer, according to the expansion water tank, the deionizer is integrated in the tank body, so that occupied space is reduced, the integration level of the device is improved, the output end of the deionizer is connected with the one-way valve, the one-way valve makes contact with the containing cavity, the deionizer can be prevented from making contact with cooling liquid for a long time, and then the service life of the deionizer is prolonged; in addition, due to the design of the one-way valve, the cooling liquid can be prevented from flowing backwards and making contact with the deionizer, in addition, when the deionizer of the expansion water tank is replaced, only the end cover needs to be detached, and great convenience is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel cells, in particular to an expansion water tank. Background Art

[0002] The hydrogen fuel cell system uses an expansion water tank to hold the coolant to replenish the coolant that evaporates during normal operation of the system. Since the cold zone components will continuously precipitate ions, a deionizer is usually required on the expansion water tank to reduce the conductivity of the coolant to ensure the normal operation of the system.

[0003] At present, the existing deionizer is mainly arranged on the pressure relief cover of the expansion water tank. On the one hand, the deionizer and the expansion water tank will occupy a large amount of space, reducing the integration of the hydrogen fuel cell system. On the other hand, some components of the deionizer will be immersed in the coolant for a long time, making the deionizer in a deionized state for a long time, resulting in a reduction in the service life of the deionizer. Utility Model Content

[0004] The purpose of the utility model is to provide an expansion water tank, which can not only reduce the occupied space and improve the integration, but also prolong the service life of the deionizer.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an expansion water tank, including a box body, an end cover, a one-way valve and a deionizer; the box body has a accommodating cavity inside, and the accommodating cavity is used to store cooling liquid, and the box body is provided with a accommodating groove on one side of a first direction, and the accommodating groove has a notch on one side of the first direction, and a limiting hole is provided on the other side, and the accommodating groove is connected with the accommodating cavity through the limiting hole; the one-way valve is arranged in the limiting hole, and is used to prevent the cooling liquid in the accommodating cavity from entering the accommodating groove; the deionizer is arranged in the accommodating groove, and the deionizer has an input end and an output end, and the output end is inserted in the limiting hole and connected to the one-way valve; the end cover is detachably installed in the notch of the accommodating groove, and the end cover also has a mounting hole extending along the first direction, and the input end is inserted in the mounting hole for inputting the cooling liquid.

[0006] Optionally, an ion concentration sensor is also included, and a first installation groove is also provided on one side of the box body where the accommodating groove is provided, the first installation groove is communicated with the accommodating cavity, the ion concentration sensor is detachably connected to the first installation groove, and the detection end of the ion concentration sensor can extend into the accommodating cavity.

[0007] Optionally, the box body is a transparent member, and the box body has a first identification line and a second identification line on one side of the second side, and the first identification line and the second identification line are arranged at intervals along the first direction.

[0008] Optionally, a liquid level sensor is also included, and a second installation groove is also provided on the side of the box body where the accommodating groove is provided, the second installation groove is communicated with the accommodating cavity, the liquid level sensor is detachably connected to the second installation groove, and the liquid level sensor is used to detect the liquid level in the accommodating cavity.

[0009] Optionally, a sealing ring is further included, wherein the sealing ring is sleeved on the output end, and the output end is clamped to the limiting hole through the sealing ring.

[0010] Optionally, the end cover includes a cover plate, a compression spring and a support plate, the cover plate is detachably mounted on the slot, the compression spring and the support plate are arranged in the accommodating groove, and one end of the compression spring is connected to the cover plate, and the other end is connected to the support plate, the mounting hole passes through the support plate and the cover plate in sequence, and the support plate is used to support the deionizer.

[0011] Optionally, the box body is further provided with an overflow pipe on the other side of the first direction, the overflow pipe is connected with the accommodating chamber, the overflow pipe is provided with an overflow valve, and the overflow valve is used to maintain the air pressure balance of the accommodating chamber.

[0012] Optionally, a plurality of reinforcing plates are provided inside the accommodating cavity, and the plurality of reinforcing plates divide the accommodating cavity into a plurality of chambers. The reinforcing plates also have connecting ports, and any two adjacent chambers are connected through the connecting ports.

[0013] Optionally, a bracket is further included, which is installed on the box and is used to fix the box.

[0014] Optionally, a side of the box body on which the accommodating groove is opened also has a liquid replenishing tube, the liquid replenishing tube and the accommodating groove are arranged at an interval, and the liquid replenishing tube is connected to the accommodating cavity for replenishing the coolant into the accommodating cavity.

[0015] Compared with the prior art, the expansion water tank of the embodiment of the utility model has the following beneficial effects: the expansion water tank integrates the deionizer inside the tank body to reduce the space occupied and improve the integration of the device; and the output end of the deionizer is connected to the one-way valve so that the one-way valve is in contact with the accommodating chamber, thereby avoiding long-term contact between the deionizer and the coolant, thereby extending the service life of the deionizer. The design of the one-way valve can also avoid the coolant from backflowing and contacting the deionizer. In addition, when replacing the deionizer, the expansion water tank only needs to remove the end cover, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of the expansion water tank according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the expansion water tank in an embodiment of the utility model;

[0018] Figure 3 It is an embodiment of the utility model Figure 2 A magnified image of point A;

[0019] Figure 4 It is an embodiment of the utility model Figure 2 A magnified view of point B;

[0020] Figure 5 It is an embodiment of the utility model Figure 2 Enlarged view of point C;

[0021] Figure 6 It is a side view of the expansion water tank according to an embodiment of the utility model.

[0022] In the figure, 1, box body; 11, accommodating chamber; 111, chamber; 12, accommodating groove; 13, limiting hole; 14, first installation groove; 15, second installation groove; 16, overflow pipe; 17, overflow valve; 18, reinforcing plate; 181, connecting port; 19, liquid replenishing pipe; 2, one-way valve; 3, deionizer; 31, input end; 32, output end; 4, end cover; 41, mounting hole; 42, cover plate; 43, compression spring; 44, support plate; 5, ion concentration sensor; 6, first identification line; 7, second identification line; 8, liquid level sensor; 9, sealing ring; 10, bracket; X, first direction. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] like Figure 1-Figure 4 As shown, an expansion water tank of an embodiment of the utility model comprises a tank body 1, an end cover 4, a one-way valve 2 and a deionizer 3; the tank body 1 has a accommodating chamber 11 inside, the accommodating chamber 11 is used to store cooling liquid, the tank body 1 is provided with a accommodating groove 12 on one side of a first direction X, the accommodating groove 12 has a notch on one side of the first direction X, and a limiting hole 13 is provided on the other side, the accommodating groove 12 is connected with the accommodating chamber 11 through the limiting hole 13; the one-way valve 2 is arranged in the limiting hole 13, and is used to prevent the cooling liquid in the accommodating chamber 11 from entering the accommodating groove 12; the deionizer 3 is arranged in the accommodating groove 12, the deionizer 3 has an input end 31 and an output end 32, the output end 32 is inserted in the limiting hole 13, and is connected with the one-way valve 2; the end cover 4 is detachably mounted on the notch of the accommodating groove 12, and the end cover 4 also has a mounting hole 41 extending along the first direction X, and the input end 31 is inserted in the mounting hole 41 for inputting cooling liquid.

[0027] Based on the above scheme, the expansion water tank integrates the deionizer 3 inside the box body 1 to reduce the space occupied and improve the integration of the device, and by connecting the output end 32 of the deionizer 3 with the one-way valve 2, the one-way valve 2 is in contact with the accommodating chamber 11, it is possible to avoid long-term contact between the deionizer 3 and the coolant, thereby extending the service life of the deionizer 3. The design of the one-way valve 2 can also prevent the coolant from backflowing and contacting the deionizer 3. In addition, when replacing the deionizer 3, the expansion water tank only needs to remove the end cover 4, which is very convenient and does not need to depressurize the water tank, thereby avoiding problems such as coolant contamination and increased conductivity caused by contact between the coolant and the external air.

[0028] like Figure 2 As shown, in order to improve the integration of the expansion water tank, an ion concentration sensor 5 is also included. A first installation groove 14 is also provided on one side of the box body 1 where the accommodating groove 12 is provided. The first installation groove 14 is communicated with the accommodating cavity 11. The ion concentration sensor 5 is detachably connected to the first installation groove 14, and the detection end of the ion concentration sensor 5 can extend into the accommodating cavity 11. The existing ion concentration sensor 5 is usually arranged in the main pipeline channel. If it is dispersedly arranged with the deionizer 3, the feedback value will fluctuate and the deviation will be large. Integrating the ion concentration sensor 5 in the supporting expansion water tank can, on the one hand, improve the integration of the expansion water tank and avoid the leakage risk caused by the exposure of metal due to the additional fixed pipe joints generated by the separate installation. On the other hand, it can also improve the measurement accuracy of the ion concentration sensor 5.

[0029] like Figure 6As shown, in order to facilitate the judgment of the amount of coolant in the accommodating chamber 11, the box body 1 is a transparent member, and the box body 1 has a first identification line 6 and a second identification line 7 on one side of the second direction. The first identification line 6 and the second identification line 7 are arranged at intervals along the first direction X, wherein the first identification line 6 is a coolant high water level identification line, and the second identification line 7 is a coolant low water level identification line.

[0030] like Figure 2 As shown, in order to detect the amount of coolant in the accommodating chamber 11 in real time, a liquid level sensor 8 is also included. A second mounting groove 15 is also provided on one side of the box body 1 where the accommodating groove 12 is provided. The second mounting groove 15 is communicated with the accommodating chamber 11. The liquid level sensor 8 is detachably connected to the second mounting groove 15, and the liquid level sensor 8 is used to detect the liquid level in the accommodating chamber 11.

[0031] In some embodiments, the detection range of the liquid level sensor 8 is below the second identification line 7 , that is, the liquid level sensor 8 can promptly feedback the situation where the coolant is lower than the second identification line 7 .

[0032] like Figure 3 As shown, in order to prevent the coolant from entering the containing groove 12 , a sealing ring 9 is further included. The sealing ring 9 is sleeved on the output end 32 , and the output end 32 is clamped in the limiting hole 13 through the sealing ring 9 .

[0033] like Figure 4 As shown, in order to adapt to various types of deionizers 3, the end cover 4 includes a cover plate 42, a compression spring 43 and a support plate 44. The cover plate 42 is detachably installed in the slot, the compression spring 43 and the support plate 44 are arranged in the accommodating groove 12, and one end of the compression spring 43 is connected to the cover plate 42, and the other end is connected to the support plate 44. The mounting hole 41 passes through the support plate 44 and the cover plate 42 in sequence. The support plate 44 is used to support the deionizer 3. The compression spring 43 makes the bottom of the deionizer 3 always abut against the support plate 44, and the space between the support plate 44 and the limiting hole 13 can be adjusted according to the specifications of the deionizer 3.

[0034] like Figure 5 As shown, in order to maintain the air pressure balance in the accommodating chamber 11, the housing 1 is further provided with an overflow pipe 16 on the other side of the first direction X. The overflow pipe 16 is connected to the accommodating chamber 11. An overflow valve 17 is provided on the overflow pipe 16. The overflow valve 17 is used to maintain the air pressure balance in the accommodating chamber 11. The overflow valve 17 ensures that the coolant pressure in the accommodating chamber 11 is controllable and balanced with the pressure on both sides of the air and hydrogen. In addition, when the water pump stops suddenly, the problem of coolant backflowing into the housing 1 and overflowing can be avoided, thereby ensuring that the fuel cell coolant is not contaminated and the safe operation of the fuel cell is ensured.

[0035] In some embodiments, the box body 1 is further provided with an air intake pipe, which is connected to the accommodating chamber 11, and the air pressure is replenished into the accommodating chamber 11 through the air intake pipe, and the air intake pipe and the overflow pipe 16 cooperate to maintain the air pressure balance in the accommodating chamber 11.

[0036] like Figure 2 As shown, in order to improve the strength of the box body 1, a plurality of reinforcing plates 18 are further provided inside the accommodating chamber 11. The plurality of reinforcing plates 18 divide the accommodating chamber 11 into a plurality of chambers 111. The reinforcing plates 18 also have a connecting port 181. Any two adjacent chambers 111 are connected through the connecting port 181.

[0037] like Figure 1 As shown, in order to facilitate the installation of the box body 1, a bracket 10 is also included. The bracket 10 is installed on the box body 1 and is used to fix the box body 1.

[0038] like Figure 1 and Figure 2 As shown, in order to facilitate the replenishment of coolant, a side of the housing 1 where the accommodating groove 12 is provided is also provided with a liquid replenishing tube 19. The liquid replenishing tube 19 and the accommodating groove 12 are spaced apart, and the liquid replenishing tube 19 is connected to the accommodating cavity 11 for replenishing the coolant to the accommodating cavity 11.

[0039] In summary, the embodiment of the utility model provides an expansion water tank, which integrates the deionizer 3 inside the box body 1 to reduce the space occupied and improve the integration of the device, and connects the output end 32 of the deionizer 3 with the one-way valve 2, so that the one-way valve 2 is in contact with the accommodating chamber 11, thereby avoiding long-term contact between the deionizer 3 and the coolant, thereby extending the service life of the deionizer 3. The design of the one-way valve 2 can also avoid the backflow of coolant and contact with the deionizer 3. In addition, when replacing the deionizer 3, the expansion water tank only needs to remove the end cover 4, which is very convenient and does not need to depressurize the water tank, thereby avoiding problems such as coolant contamination and increased conductivity caused by contact between the coolant and the external air.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An expansion water tank, It is characterized in that It includes a box body, a one-way valve, a deionizer and an end cover; The box body has a receiving cavity inside, and the receiving cavity is used to store cooling liquid. The box body is provided with a receiving groove on one side of the first direction, and the receiving groove has a notch on one side of the first direction and a limiting hole on the other side, and the receiving groove is connected with the receiving cavity through the limiting hole; The one-way valve is arranged at the limiting hole, and is used to prevent the coolant in the accommodating cavity from entering the accommodating groove; The deionizer is arranged in the containing tank, and the deionizer has an input end and an output end, and the output end is inserted into the limiting hole and connected to the one-way valve; The end cover is detachably mounted on the notch of the accommodating groove, and the end cover also has a mounting hole extending along the first direction, and the input end is inserted into the mounting hole for inputting the coolant.

2. The expansion water tank according to claim 1, It is characterized in that It also includes an ion concentration sensor. A first mounting groove is also provided on one side of the box body where the accommodating groove is provided. The first mounting groove is communicated with the accommodating cavity. The ion concentration sensor is detachably connected to the first mounting groove, and the detection end of the ion concentration sensor can extend into the accommodating cavity.

3. The expansion water tank according to claim 1, It is characterized in that The box body is a transparent member, and one side of the box body further has a first identification line and a second identification line, and the first identification line and the second identification line are arranged at intervals along the first direction.

4. The expansion water tank according to claim 1, It is characterized in that It also includes a liquid level sensor. A second installation groove is provided on one side of the box body where the accommodating groove is provided. The second installation groove is communicated with the accommodating cavity. The liquid level sensor is detachably connected to the second installation groove, and the liquid level sensor is used to detect the liquid level in the accommodating cavity.

5. The expansion water tank according to claim 1, It is characterized in that It also includes a sealing ring, which is sleeved on the output end, and the output end is clamped in the limiting hole through the sealing ring.

6. The expansion water tank according to claim 1, It is characterized in that The end cover includes a cover plate, a compression spring and a support plate. The cover plate is detachably installed in the slot. The compression spring and the support plate are arranged in the accommodating groove, and one end of the compression spring is connected to the cover plate, and the other end is connected to the support plate. The mounting hole passes through the support plate and the cover plate in sequence, and the support plate is used to support the deionizer.

7. The expansion water tank according to claim 1, It is characterized in that The box body is further provided with an overflow pipe on the other side of the first direction, the overflow pipe is communicated with the accommodating chamber, an overflow valve is provided on the overflow pipe, and the overflow valve is used to maintain the air pressure balance of the accommodating chamber.

8. The expansion water tank according to claim 1, It is characterized in that A plurality of reinforcing plates are also provided inside the accommodating cavity, and the plurality of reinforcing plates divide the accommodating cavity into a plurality of chambers. The reinforcing plates also have a connecting port, and any two adjacent chambers are connected through the connecting port.

9. The expansion water tank according to claim 1, It is characterized in that It also includes a bracket, which is installed on the box body and is used to fix the box body.

10. The expansion water tank according to any one of claims 1 to 9, It is characterized in that A liquid replenishing tube is also provided on one side of the box body where the accommodating groove is opened. The liquid replenishing tube and the accommodating groove are arranged at intervals. The liquid replenishing tube is communicated with the accommodating cavity and is used to replenish the cooling liquid into the accommodating cavity.

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