Constant-pressure hot water tank of solar water heater

Abstract

The utility model relates to the technical field of solar water heaters, and discloses a constant-pressure hot water tank of a solar water heater, which comprises a hot water tank, a sealing sleeve is fixedly connected to the middle of the top end of the hot water tank, and a sealing mechanism is mounted at the lower end of the sealing sleeve. According to the constant-pressure hot water tank of the solar water heater, a sealing plug is pushed by a pushing plate to move downwards, a second connecting rod is controlled to move in the pushing plate to be in a center state under the action of pressure intensity and the elasticity of a second spring, and when the interior of the hot water tank is under pressure, the sealing plug moves downwards, a second trigger switch is controlled to be triggered, and a gear motor is controlled to be started; when water is supplied, the internal pressure of the hot water tank is increased, the first trigger switch is triggered, the pushing plate moves upwards, the internal pressure of the hot water tank can be reduced, then the internal pressure of the hot water tank can be automatically adjusted according to requirements, and it is ensured that the internal pressure of the hot water tank is continuously kept in a constant pressure state.

Description

Technical Field

[0001] This utility model relates to the field of solar water heater technology, specifically to a constant pressure hot water tank for a solar water heater. Background Technology

[0002] Solar water heaters are heating devices that convert solar energy into heat energy, heating water from low to high temperatures to meet people's hot water needs in daily life and production. Solar water heaters are classified into evacuated tube solar water heaters and flat-plate solar water heaters according to their structure, with evacuated tube solar water heaters being the dominant type, accounting for 95% of the domestic market share. A evacuated tube household solar water heater consists of collector tubes, a storage tank, and supporting components. The conversion of solar energy into heat energy mainly relies on the evacuated collector tubes. These tubes utilize the principle that hot water rises and cold water sinks, creating a micro-circulation of the water to obtain the desired hot water. After generating hot water, the solar water heater stores it inside the hot water tank, from which it supplies water to users.

[0003] Typically, when using a hot water tank, it needs to be placed at a high position to ensure sufficient pressure when hot water is output, avoiding slow water supply due to insufficient internal pressure. Therefore, a constant pressure device is installed inside the hot water tank during use. This device can automatically supply gas to the inside of the tank when the internal pressure is insufficient, ensuring a continuous high-pressure state and improving water supply efficiency. However, after hot water is delivered into the tank, it generates steam. The increased steam increases the internal pressure of the tank, and excessive pressure can damage the tank. Furthermore, the constant pressure device has difficulty discharging excess gas from the tank, leading to a reduction in the tank's lifespan. Therefore, we propose a constant pressure hot water tank for solar water heaters. Utility Model Content

[0004] To address the shortcomings of existing constant-pressure hot water tanks in solar water heaters, this utility model provides a constant-pressure hot water tank for solar water heaters. This tank features a second connecting rod installed inside a push plate. The position of the second connecting rod inside the push plate can be adjusted according to different pressures, thus automatically adjusting the tank based on varying internal pressures. This ensures the lifespan of the hot water tank equipment and solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a constant pressure hot water tank for a solar water heater, comprising a hot water tank, a sealing sleeve fixedly connected to the middle of the top of the hot water tank, a sealing mechanism installed at the lower end of the sealing sleeve, a constant pressure device body sleeved inside the sealing sleeve, buffer boxes fixedly connected to both sides of the upper part of the constant pressure device body, a lead screw installed inside the buffer box, a push plate fixedly connected to the lower end of the lead screw, a sealing plug installed at the lower end of the push plate through a second connecting rod, and a telescopic control device installed outside the lead screw.

[0006] Preferably, the sealing mechanism includes a sealing gasket, a first connecting rod passing through the sealing gasket is installed at the lower end of the sealing sleeve, a first spring is installed on the outside of the lower end of the first connecting rod, and an installation pin is fixedly connected to the lower part of the constant pressure device body, the installation pin being in contact with the sealing gasket.

[0007] Preferably, the telescopic control device includes a helical gear, which is movably mounted in the middle of the upper end of the buffer box. The helical gear is threadedly connected to the lead screw, and a gear motor is meshed on the side of the helical gear.

[0008] Preferably, a first trigger switch is installed between the push plate and the sealing plug, and a second trigger switch is installed on the outside of the second connecting rod, aligned with the upper end of the push plate. The first trigger switch and the second trigger switch control the start of the gear motor.

[0009] Preferably, a water supply pipe is installed on one side of the upper part of the hot water tank, and a water outlet pipe is installed on one side of the lower part of the hot water tank. The main body of the constant pressure device is installed on the outside of the hot water tank by fastening bolts.

[0010] Preferably, a second spring is installed between the push plate and the sealing plug, and the sealing plug is fitted to the inner wall of the constant pressure device body.

[0011] Preferably, a pressure relief groove is provided inside one side of the constant pressure device body, and the pressure relief groove is located inside the constant pressure device body above the sealing gasket.

[0012] Compared with the existing constant pressure hot water tank of solar water heaters, this utility model has the following advantages:

[0013] 1. The constant pressure hot water tank of this solar water heater uses a push plate to move the sealing plug downwards. Under the action of pressure and the elasticity of the second spring, the second connecting rod is controlled to move in a centered state inside the push plate. When the hot water tank is under-pressured, the sealing plug moves downwards, triggering the second trigger switch and starting the gear motor. This causes the push plate to move downwards, applying pressure to the inside of the hot water tank. Simultaneously, when water is supplied, the pressure inside the hot water tank increases, triggering the first trigger switch and causing the push plate to move upwards, thus reducing the pressure inside the hot water tank. The pressure inside the hot water tank can then be automatically adjusted according to demand to ensure that the pressure inside the hot water tank remains constant.

[0014] 2. The constant pressure hot water tank of this solar water heater is installed inside the outlet pipe by the constant pressure device body. At the same time, the constant pressure device body drives the installation pin to push open the sealing gasket, that is, the sealing gasket can seal the lower end of the sealing sleeve, ensuring that the pressure inside the hot water tank is not disturbed during the installation and maintenance of the constant pressure device body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the main body of this utility model;

[0017] Figure 3 This is an enlarged structural schematic diagram of the sealing mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the constant pressure device of this utility model;

[0019] Figure 5 This is a cross-sectional view of the constant pressure device of this utility model;

[0020] Figure 6 This is an enlarged structural diagram of point A in this utility model.

[0021] In the diagram: 1. Hot water tank; 2. Water supply pipe; 3. Water outlet pipe; 4. Sealing sleeve; 5. First connecting rod; 6. Sealing gasket; 7. First spring; 8. Main body of constant pressure equipment; 9. Fastening bolt; 10. Buffer box; 11. Lead screw; 12. Push plate; 13. Second connecting rod; 14. Sealing plug; 15. Second spring; 16. First trigger switch; 17. Second trigger switch; 18. Mounting pin; 19. Helical gear; 20. Gear motor; 21. Pressure relief groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A constant-pressure hot water tank for a solar water heater includes a hot water tank 1. A sealing sleeve 4 is fixedly connected to the middle of the top of the hot water tank 1, which limits the constant pressure device. A sealing mechanism is installed at the lower end of the sealing sleeve 4, which maintains the seal inside the water tank when the constant pressure device is disassembled and cleaned. A constant pressure device body 8 is fitted inside the sealing sleeve 4. Buffer boxes 10 are fixedly connected to both sides of the upper part of the constant pressure device body 8, which provides movement space for a second connecting rod 13. A lead screw 11 is installed inside the buffer box 10, and a push plate 12 is fixedly connected to the lower end of the lead screw 11. A sealing plug 14 is installed at the lower end of the push plate 12 through the second connecting rod 13. The push plate 12 pushes the sealing plug 14 downward, which can compress the gas inside the hot water tank 1 to ensure that the hot water tank 1 maintains a constant pressure. A telescopic control device is installed outside the lead screw 11, which adjusts the position of the sealing plug 14.

[0024] Please see Figure 3 The sealing mechanism includes a sealing gasket 6. A first connecting rod 5 passing through the sealing gasket 6 is installed at the lower end of the sealing sleeve 4. A first spring 7 is installed on the outside of the lower end of the first connecting rod 5. An installation pin 18 is fixedly connected to the lower part of the constant pressure equipment body 8. The installation pin 18 contacts the sealing gasket 6. The sealing gasket 6 is sleeved and installed at the lower end of the sealing sleeve 4 by the first connecting rod 5. When the constant pressure equipment body 8 is installed inside the sealing sleeve 4, the constant pressure equipment body 8 drives the installation pin 18 to contact the sealing gasket 6, and at the same time pushes the sealing gasket 6 downward, that is, the lower end of the sealing sleeve 4 forms an opening, which facilitates the transmission of gas through it. At the same time, when the constant pressure equipment body 8 is disassembled, the constant pressure equipment body 8 is taken out from inside the sealing sleeve 4. That is, the sealing gasket 6 is pushed to contact the lower end of the sealing sleeve 4 under the elastic action of the first spring 7, ensuring the sealing of the inside of the sealing sleeve 4 and preventing the hot water tank 1 from being pressurized when the constant pressure equipment body 8 is continuously installed. At the same time, the sealing gasket 6 is located at the lower end of the constant pressure equipment body 8, which further improves its waterproof performance.

[0025] Please see Figure 4The telescopic control device includes a helical gear 19, which is movably installed in the middle of the upper end of the buffer box 10. The helical gear 19 is threadedly connected to the lead screw 11. A gear motor 20 is meshed on the side of the helical gear 19. When the gear motor 20 is started, the gear motor 20 and the helical gear 19 mesh, and the helical gear 19 and the lead screw 11 move threadedly, ensuring that the height of the lead screw 11 inside the buffer box 10 can be adjusted. When the lead screw 11 moves downward, it drives the sealing plug 14 to squeeze inside the constant pressure device body 8, ensuring that the hot water tank 1 is kept under high pressure.

[0026] Please see Figure 6 A first trigger switch 16 is installed between the push plate 12 and the sealing plug 14. A second trigger switch 17 is installed on the outside of the second connecting rod 13, aligned with the upper end of the push plate 12. The first trigger switch 16 and the second trigger switch 17 control the start of the gear motor 20. When the hot water tank 1 is under high pressure, the push plate 12 moves downwards to the middle of the second connecting rod 13. When a pressure deficiency occurs inside the hot water tank 1, the second spring 15 pushes the sealing plug 14 downwards, controlling the sealing... The second trigger switch 17 installed at the lower end of the sealing plug 14 contacts the second trigger switch 17 installed at the upper end of the push plate 12. At the same time, the trigger switch controls the gear motor 20 to start, that is, controls the sealing plug 14 to move downward, which can compress the gas inside the hot water tank 1. When the pressure inside the hot water tank 1 is too high, the sealing plug 14 is pressured to move upward, which controls the first trigger switch 16 to move upward. That is, the gear motor 20 controls the helical gear 19 to rotate in the opposite direction, which can drive the push plate 12 to move upward, reduce the pressure inside the hot water tank 1, and thus ensure that the pressure inside the hot water tank 1 remains balanced.

[0027] Please see Figure 1 A water supply pipe 2 is installed on one side of the upper part of the hot water tank 1, and a water outlet pipe 3 is installed on one side of the lower part of the hot water tank 1. The constant pressure equipment body 8 is installed on the outside of the hot water tank 1 by fastening bolts 9. Hot water is injected into the hot water tank 1 through the water supply pipe 2 and discharged through the water outlet pipe 3 to ensure water supply. At the same time, the constant pressure equipment body 8 is installed on the upper part of the hot water tank 1 by fastening bolts 9 to ensure the stability of the constant pressure equipment body 8 when it is in use.

[0028] Please see Figure 6A second spring 15 is installed between the push plate 12 and the sealing plug 14. The sealing plug 14 is fitted to the inner wall of the constant pressure equipment body 8. The second spring 15 provides pressure between the push plate 12 and the sealing plug 14. Depending on the pressure requirement when the equipment is used, pressure can be applied to the air inside the hot water tank 1. After the sealing plug 14 moves to the lower end inside the constant pressure equipment body 8, the lead screw 11 can be controlled to return to the initial state.

[0029] Please see Figure 6 A pressure relief groove 21 is provided inside one side of the constant pressure device body 8. The pressure relief groove 21 is located inside the constant pressure device body 8 above the sealing gasket 6. When the liquid inside the hot water tank 1 is used continuously, the liquid is discharged, and at the same time, a negative pressure state is formed inside the hot water tank 1. The control push plate 12 is moved to the upper end, and the sealing plug 14 is moved to the upper part of the pressure relief groove 21. At the same time, the pressure relief groove 21 drives the inside of the hot water tank 1 to connect with the outside. At the same time, external air is injected into the inside of the hot water tank 1 to ensure that the pressure inside and outside the hot water tank 1 remains balanced. At the same time, the sealing plug 14 is moved downward again to apply pressure to the inside of the hot water tank 1, ensuring that the inside of the hot water tank 1 contains a constant pressure state.

[0030] Working principle: During use, the constant pressure device body 8 is installed inside the sealing sleeve 4. The constant pressure device body 8 pushes open the sealing gasket 6 through the mounting pin 18, thus establishing communication between the constant pressure device body 8 and the interior of the hot water tank 1. At the same time, the fastening bolt 9 fixes the constant pressure device body 8 in its position inside the sealing sleeve 4. Hot water is injected into the hot water tank 1 through the water supply pipe 2. As the hot water tank 1 is filled with liquid, the gas is pressurized, creating a high-pressure state inside the hot water tank 1. The steam generated by the hot steam further increases the pressure inside the hot water tank 1. Under pressure, the sealing plug 14 moves upward, triggering the first trigger switch 16, which controls the gear motor 20 to start. The motor 20 drives the lead screw 11 to move upward, which can release pressure and prevent excessive pressure inside the hot water tank 1. At the same time, after the liquid is discharged through the outlet pipe 3, the hot water tank 1 will be under-pressurized. The second spring 15 pushes the sealing plug 14 downward. When the sealing plug 14 continues to move downward, the second connecting rod 13 contacts the push plate 12. When the second trigger switch 17 is triggered, the gear motor 20 drives the lead screw 11 to move downward. After the sealing plug 14 moves downward, the pressure inside the hot water tank 1 can be increased. That is, the internal pressure of the hot water tank 1 can be adjusted according to the different internal pressures of the hot water tank 1 to ensure that the internal pressure of the hot water tank 1 remains stable.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant pressure hot water tank for a solar water heater, comprising a hot water tank (1), a sealing sleeve (4) fixedly connected to the middle of the top end of the hot water tank (1), characterized in that: The lower end of the sealing sleeve (4) is provided with a sealing mechanism, the inside of the sealing sleeve (4) is sleeved with a constant pressure device body (8), the upper part of the constant pressure device body (8) is fixedly connected with a buffer tank (10) on both sides, the inside of the buffer tank (10) is provided with a lead screw (11), the lower end of the lead screw (11) is fixedly connected with a push plate (12), the lower end of the push plate (12) is provided with a sealing plug (14) through a second connecting rod (13), and the outside of the lead screw (11) is provided with a telescopic control device.

2. A constant pressure hot water tank for a solar water heater as claimed in claim 1, wherein: The sealing mechanism comprises a sealing gasket (6), the lower end of the sealing sleeve (4) is provided with a first connecting rod (5) penetrating through the sealing gasket (6), the outside of the lower end of the first connecting rod (5) is provided with a first spring (7), the lower part of the constant pressure device body (8) is fixedly connected with a mounting pin (18), and the mounting pin (18) is in contact with the sealing gasket (6).

3. A constant pressure hot water tank for a solar water heater as claimed in claim 1, wherein: The telescopic control device comprises a helical gear (19), the helical gear (19) is movably arranged at the middle part of the upper end of the buffer tank (10), and the helical gear (19) is in threaded connection with the lead screw (11); the side surface of the helical gear (19) is engagedly provided with a gear motor (20).

4. A constant pressure hot water tank for a solar water heater as claimed in claim 1, wherein: The first trigger switch (16) is arranged between the push plate (12) and the sealing plug (14), the second trigger switch (17) is arranged on the outside of the second connecting rod (13) and aligned with the upper end of the push plate (12), and the first trigger switch (16) and the second trigger switch (17) control the start of the gear motor (20).

5. A constant pressure water heater tank for a solar water heater according to claim 1 wherein: The upper end of the hot water tank (1) is provided with a water supply pipe (2) on one side, the lower part of the hot water tank (1) is provided with a water outlet pipe (3) on one side, and the constant pressure device body (8) is arranged outside the hot water tank (1) through a fastening bolt (9).

6. A constant pressure hot water tank for a solar water heater as claimed in claim 1, wherein: The second spring (15) is arranged between the push plate (12) and the sealing plug (14), and the sealing plug (14) is arranged in close contact with the inner wall of the constant pressure device body (8).

7. A constant pressure hot water tank for a solar water heater as claimed in claim 1, wherein: The inside of one side of the constant pressure device body (8) is provided with a pressure relief groove (21), and the pressure relief groove (21) is arranged at the upper end of the sealing gasket (6) in the constant pressure device body (8).

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