CN201575632U - Pressure-bearing water tank of water heater - Google Patents

Abstract

The utility model relates to a pressure-bearing water heater water tank, it includes insulation box, water tank, electrical heating stick, magnesium stick, heat exchanger, inlet tube, outlet pipe and thermal insulation layer, its characterized in that: the water outlet pipe is arranged at the upper part of one end of the water tank far away from the water inlet pipe, and the heat exchanger adopts a tubular heat exchanger with a plurality of radiating fins and is close to the bottom in the water tank; two ends of the tubular heat exchanger are respectively connected with the solar heat collector through a circulating inlet pipe and a circulating outlet pipe, and the heat transfer working medium circularly flows in the tubular heat exchanger and the solar heat collector to form a circulating heat exchange loop; the middle part of the tubular heat exchanger is provided with an exhaust pipe, and the outlet heights of the circulating inlet pipe, the circulating outlet pipe and the exhaust pipe in the tubular heat exchanger are sequentially increased. The utility model discloses owing to adopt tubular heat exchanger, and through circulating inlet and outlet pipe connection solar collector, form circulation heat transfer return circuit, realize heating the cold water in the water tank, can also carry out the auxiliary heating to the water tank through the electric heating rod, improved the system heating effect. The utility model discloses but wide application in components of a whole that can function independently double circuit solar water heating system.

Description

A pressurized water heater tank

technical field

The utility model relates to a water heater water tank, in particular to a pressurized water heater water tank with a heat exchanger used in a solar centralized-dispersed hot water supply system.

Background technique

The solar energy centralized-decentralized system is a solar water heating system in which the solar collectors are installed centrally and the water tanks are installed around each user. The solar collectors transfer the heat obtained to the user side through the heat transfer medium. water tank to heat the water in the water tank. According to the type of pressure, the water tank of solar energy concentration-distributed system can be divided into pressure water heater water tank and non-pressure water heater water tank, and according to the heat exchange method, it can be divided into sleeve heat exchanger system, tube heat exchange system and plate heat exchange system. As shown in FIG. 1 , a traditional pressurized water heater tank includes an insulated tank 1 , and a cylindrical enamel tank 2 is arranged inside the tank 1 . An electric heating rod 3 is arranged at one side end of the water tank 2 , and a magnesium rod 4 for prolonging the service life of the water tank 2 and the electric heating rod 3 is arranged on one side of the electric heating rod 3 . A coil heat exchanger 5 is arranged in the middle of the water tank 2, and the inlet pipe 6 and the outlet pipe 7 of the coil heat exchanger 5 are respectively connected with a solar collector 8, and the heat transfer working fluid flows between the coil heat exchanger 5 and the outlet pipe 7. The circulation flow in the solar heat collector 8 forms a circulation heat exchange loop. A water inlet pipe 9 and a water outlet pipe 10 are respectively arranged at both ends of the bottom wall of the water tank 2 , and the water outlet of the water inlet pipe 9 is lower than the water inlet of the water outlet pipe 10 . At the same time, a polyurethane foam material is set between the box body 1 and the water tank 2 as the thermal insulation layer 11 to reduce heat dissipation. When the water temperature in the water tank 2 is lower than the set temperature, the electric heating rod 3 in the water tank 2 heats the water; when the water temperature is higher than the set temperature, the electric heating rod 3 stops heating. When hot water is needed, cold water is injected into the water tank 2 through the water inlet pipe 9, and hot water is discharged through the water outlet pipe 10 for users to use. However, it was found during use that when the water tank of this water heater is used in a centralized-decentralized hot water supply system, non-condensable gas tends to accumulate in the coil heat exchanger 5, hindering the flow of heat transfer working fluid, which not only causes uneven flow in each branch pipeline , and the heat generated by the user's electric heating will be taken out to the centralized-decentralized hot water supply system, which will damage the interests of the user.

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a pressurized water heater water tank with better heating effect and suitable for solar centralized-decentralized hot water supply system.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a pressurized water heater tank, which includes a thermal insulation box, a water tank, an electric heating rod, a magnesium rod, a heat exchanger, a water inlet pipe, an outlet The water pipe and a thermal insulation layer are characterized in that: the water outlet pipe is arranged on the upper part of the water tank far away from the water inlet pipe, and the heat exchanger adopts a tubular heat exchanger with a plurality of cooling fins, and the The tubular heat exchanger is arranged near the bottom of the water tank; the two ends of the tubular heat exchanger are respectively connected to the solar collector through a circulation inlet pipe and a circulation outlet pipe, and the heat transfer working medium Circulating in the tube heat exchanger and the solar heat collector forms a circulation heat exchange loop; an exhaust pipe is arranged in the middle of the tube heat exchanger, and the circulation inlet pipe, circulation outlet pipe and exhaust The outlet height of the tubes in the tubular heat exchanger increases successively.

The electric heating rod is arranged above the tubular heat exchanger.

A valve is arranged on the exhaust pipe.

The heat transfer medium is one of water, ethylene glycol aqueous solution, propylene glycol aqueous solution and silicone oil.

The utility model has the following advantages due to the adoption of the above technical scheme: 1. The utility model adopts a tubular heat exchanger with a plurality of cooling fins, and the two ends of the tubular heat exchanger pass through a circulation inlet pipe and a circulation inlet pipe respectively. The outlet pipe is connected to the solar heat collector, and an exhaust pipe is set in the middle of the tubular heat exchanger. The heat transfer working medium circulates in the tubular heat exchanger and the solar heat collector to form a circular heat exchange loop. The working medium can heat the cold water in the water tank through the tube heat exchanger, and can also assist in heating the water tank through the electric heating rod in the water tank. Therefore, the heating effect of the system is greatly improved. 2. Since the utility model adopts the electric heating rod arranged above the tubular heat exchanger, not only can the cold water in the water tank be auxiliary heated according to the needs of users; Therefore, the heat generated by the electric heating rod will not be taken out to the circulation pipeline of the solar collector through the tubular heat exchanger. 3. The utility model is equipped with an exhaust pipe on the tubular heat exchanger, which can remove the air accumulated in the tubular heat exchanger, thus ensuring the smooth flow of working fluid in the solar system and ensuring the safety of branch pipelines of different users. flow uniformity. 4. The utility model is provided with a water outlet pipe on one end of the water tank, and the water inlet pipe is located at the bottom of the water tank, so that the water inlet pipe is far lower than the water outlet pipe, effectively ensuring that the water heater tank can provide more hot water. The utility model can be widely used in split double-circuit solar water heating systems.

Description of drawings

Fig. 1 is a structural schematic diagram of a pressurized water heater tank in the prior art

Fig. 2 is the overall structural representation of the utility model

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in Figure 2, the utility model comprises the same insulation box body 1, water tank 2, electric heating rod 3, magnesium rod 4, solar heat collector 8, water inlet pipe 9, water outlet pipe 10 and Heat insulation layer 11, the difference is that the utility model sets the outlet pipe 10 on the upper part of the water tank 2 far away from the water inlet pipe 9, and adopts a tubular heat exchanger 13 with a plurality of cooling fins 12 instead of a coil heat exchanger , and the tubular heat exchanger 13 is arranged near the bottom of the water tank 2, thereby greatly increasing the heat exchange capacity of the tubular heat exchanger 13. The two ends of the tubular heat exchanger 13 are respectively connected to the tubular heat exchanger 13 through a circulation inlet pipe 14 and a circulation outlet pipe 15, and the heat transfer medium circulates in the tubular heat exchanger 13 and the solar collector 8 The flow forms a cyclic heat exchange loop. An exhaust pipe 16 is arranged in the middle of the tubular heat exchanger 13 , and the outlet heights of the circulation inlet pipe 14 , the circulation outlet pipe 15 and the exhaust pipe 16 in the tubular heat exchanger 13 increase sequentially.

In the above embodiment, the electric heating rod 3 can be arranged above the tubular heat exchanger 13 and activated when the user needs to increase the water temperature in the water tank 2, as an auxiliary heat source for the solar centralized-decentralized hot water supply system.

In the above embodiments, the heat transfer medium in the solar heat collector 8 and the tubular heat exchanger 13 can be water, ethylene glycol aqueous solution, propylene glycol aqueous solution, or silicone oil.

In the above-mentioned embodiment, a valve (not shown in the figure) can be set on the exhaust pipe 16. If there is non-condensable gas in the tubular heat exchanger during operation, the valve can be opened, so that the heat transfer working medium belt can be discharged. The use of non-condensable gas avoids the air blockage of each pipeline, and at the same time ensures the flow balance of the branch pipelines of different users of the system.

When the utility model is used in a solar centralized-decentralized hot water supply system, the solar heat collector 8 absorbs solar energy and converts the solar energy into thermal energy to heat the heat-transfer working medium, and the heat-transfer working medium after absorbing heat flows into the circulating inlet pipe 14 In the tube heat exchanger 13, the heat is transferred to the water tank 2 through the tube heat exchanger 13 and the cooling fins 12 on the tube heat exchanger 13, and then the water in the water tank 2 is heated. After the heat transfer medium releases the heat Flow back into the solar heat collector 8 from the circulation outlet pipe 15 to absorb heat again. The user can also turn on the electric heating rod 3 to heat the water in the water tank 2 according to the demand for hot water, so as to realize the all-weather hot water supply capability, so the utility model can ensure the normal use of the solar energy centralized-decentralized hot water supply system.

In each of the above-mentioned embodiments, there may be other changes in the structure and connection, for example, the shape of the cooling fin 12 and the connection mode with the tube heat exchanger 13 are all changeable, and all based on the technical solution of the utility model The changes and improvements should not be excluded from the protection scope of the present utility model.

Claims (5)

1. bearing hot water device water tank, it comprises an insulation casing, a water tank, an electrically heated rod, a magnesium rod, a heat exchanger, a water inlet pipe, an outlet pipe and an insulation layer, it is characterized in that: described outlet pipe is arranged on the described water tank one end top away from described water inlet pipe, described heat exchanger adopts a pipe heat exchanger with some radiating fins, and described pipe heat exchanger is arranged in the described water tank near bottom position; The two ends of described pipe heat exchanger are connected with described solar thermal collector with a loop exit pipe by a circulation inlet tube respectively, and heat-transfer working medium circulates in described pipe heat exchanger and solar thermal collector and forms the cycle heat exchange loop; At the middle part of described pipe heat exchanger one blast pipe is set, described circulation inlet tube, loop exit pipe and the blast pipe open height that goes out in described pipe heat exchanger raises successively.

2. a kind of bearing hot water device water tank as claimed in claim 1, it is characterized in that: described electrically heated rod is arranged on the top of described pipe heat exchanger.

3. a kind of bearing hot water device water tank as claimed in claim 1, it is characterized in that: described blast pipe is provided with a valve.

4. a kind of bearing hot water device water tank as claimed in claim 2, it is characterized in that: described blast pipe is provided with a valve.

5. as claim 1 or 2 or 3 or 4 described a kind of bearing hot water device water tanks, it is characterized in that: described heat-transfer working medium adopts one of water, glycol water, aqueous solution of propylene glycol and silicone oil.

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