CN104676928A - Coil pipe auxiliary heating double-container type water tank of solar and heat pump water heater - Google Patents

Abstract

The invention relates to a water tank of a coil-tube heating auxiliary double-tank solar air energy water heater. It mainly uses a water tank outer tank inside the water tank shell, and a pressurized water tank inner tank inside the water tank outer tank; the two sides of the lower part of the water tank outer tank are respectively equipped with a solar circulating water inlet pipe and a solar circulating water outlet pipe, and the pressurized water tank The top of the tank is provided with a hot water outlet pipe and a vacuum heat insulation pipe, and one end of the vacuum heat insulation pipe is connected to the cold water inlet pipe; a refrigerant heat exchange coil is installed in the gap between the outer tank of the water tank and the inner tank of the pressurized water tank. The present invention adopts the double tank structure of the outer bladder of the water tank and the inner tank of the pressurized water tank, which integrates solar energy and air energy hot water, and the solar circulating water and domestic water do not affect the water quality. The water tank is simple in structure, small in size, convenient to manufacture and install, Stable operation, high heat preservation and energy saving efficiency.

Description

A kind of coil auxiliary heating double tank type solar air energy water heater water tank

technical field

The invention relates to the comprehensive utilization technology of solar energy and air energy, specifically refers to an energy-saving, environment-friendly, high-efficiency, and stable household-type coil auxiliary heating double-tank solar air energy water heater water tank, which belongs to the technical field of solar energy and air energy water heaters.

Background technique

Commonly used heat sources for domestic water heaters in my country mainly include solar energy, air energy, electric energy, and gas. Solar water heaters use renewable solar energy resources, and basically do not need to consume other energy for operation; air energy water heaters are air energy utilization systems powered by electric energy. Compared with electric water heaters, their thermal efficiency is 300%-500% of electric water heaters my country's electric power production is still dominated by thermal power at present, and the operation of electric water heaters and gas water heaters mainly depends on the consumption of non-renewable energy to obtain hot water.

my country is a country rich in solar energy resources. In recent years, the research and application of solar water heaters in our country has developed rapidly. However, solar energy resources are greatly affected by seasonal changes and weather changes. The ability to produce hot water in winter is poor, especially in rainy weather. The sky cannot even produce hot water, therefore, solar water heaters often need to set an auxiliary heat source. At present, the commonly used auxiliary energy for solar water heaters is electric energy. If the auxiliary electric energy is not properly controlled in actual operation, the electric energy consumption will be greater than the solar energy gain, and even under the same hot water consumption, the auxiliary power consumption of solar water heaters is greater than that of pure electric water heaters. Therefore, the selection of auxiliary heat sources for solar water heaters and the energy-saving design of hot water systems are important issues facing the development of solar thermal technology.

Air energy water heaters are another high-efficiency and energy-saving domestic hot water preparation technology that has developed rapidly in recent years. Compared with solar water heating technology, air energy water heaters are basically not affected by seasons and weather in southern my country. Therefore, The comprehensive utilization technology of solar energy and air energy is one of the ideal domestic hot water production technologies in southern my country. Split air conditioners are very popular household appliances in residential houses in southern my country, and the utilization rate of household air conditioners is generally very low in a year. Therefore, making full use of the principle of heat pump technology and providing auxiliary heat sources for solar water heaters while operating comfortably in indoor air conditioners can not only realize the comprehensive utilization of solar energy and air energy, but also improve the efficiency of household air conditioning systems. Among them, designing a water heater tank with stable operation, small size, simple manufacture, low manufacturing cost, high thermal insulation and energy saving efficiency is one of the important problems faced by this comprehensive utilization technology of solar energy and air energy.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a coil auxiliary heating double-tank solar air energy water heater water tank with simple structure, small volume, convenient manufacture and installation, stable operation, high heat preservation and energy saving efficiency.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a coil auxiliary heating double-tank solar air energy water heater water tank, which includes: cold water inlet pipe, hot water outlet pipe, refrigerant inlet pipe, refrigerant Return pipe, refrigerant heat exchanger, solar circulating water inlet pipe, solar circulating water outlet pipe, outer gallbladder exhaust pipe, vacuum heat insulation pipe, inner tank of pressurized water tank, outer tank of water tank, outer shell of water tank, thermal insulation material, electric tricycle Through the reversing valve, temperature sensor 1, temperature sensor 2, controller, and bypass pipe, the pressurized water tank liner is placed inside the water tank outer liner, and the top surface of the water tank outer liner is in close contact with the side surface of the pressurized water tank liner; The inner liner of the pressure-bearing water tank and the outer liner of the water tank are placed inside the water tank shell, and the gap in the water tank shell is filled with thermal insulation materials; the cold water inlet pipe is connected to the vacuum heat insulation pipe, and one end of the vacuum heat insulation pipe Installed on the top of the water tank shell, the vacuum insulation pipe is connected to the top of the pressurized water tank liner and extends into the lower part of the pressurized water tank liner, the top of the pressurized water tank liner is connected to the hot water outlet pipe, and the hot water outlet pipe is connected to the water tank The top of the shell is connected; the side of the water tank shell is connected to the solar circulating water inlet pipe, the solar circulating water inlet pipe is connected to the outer tank of the water tank, the outer tank of the water tank is connected to the solar circulating water outlet pipe, and the solar circulating water outlet pipe is connected to the side of the water tank shell ; The upper part of the outer tank of the water tank is provided with an outer tank exhaust pipe; the described refrigerant heat exchanger is installed in the gap between the inner tank inner tank and the outer tank of the water tank, The refrigerant inlet pipe is in close contact with the tank; the refrigerant inlet pipe enters from the upper part of the water tank shell and the top of the outer tank of the water tank, the refrigerant inlet pipe is connected with the refrigerant heat exchanger, the refrigerant heat exchanger is connected with the refrigerant return pipe, and the refrigerant The return pipe protrudes from the top of the outer tank of the water tank and the upper part of the water tank shell; the first temperature sensor is in close contact with the outer surface of the solar circulating water inlet pipe, the first temperature sensor is connected to the controller, and the second temperature sensor is connected to the outer surface of the inner tank of the pressurized water tank Contact, the temperature sensor two is connected to the controller; the controller controls the electric three-way reversing valve according to the temperature difference between the temperature sensor one and the temperature sensor two, so that the circulating water enters the solar circulating water inlet pipe or enters the bypass pipe.

The advantages and positive effects of the present invention are: 1) The refrigerant heat exchange coil is installed in the gap between the inner tank of the pressurized water tank and the outer tank of the water tank. At the same time, the small void volume makes the water capacity and heat capacity smaller, which is conducive to rapid temperature rise when the air energy is assisted by heating; 2) Solar circulating water and domestic hot water pass through the pressure The surface of the inner tank of the water tank exchanges heat, and its heat transfer coefficient is large. When the solar circulating water exchanges heat in the outer tank of the water tank, the flow rate is low and the flow resistance is small. It is suitable for the solar hot water system of natural circulation; 3) The water inlet pipe of the inner tank of the pressurized water tank The use of vacuum heat insulation pipes can effectively block the loss of heat transfer along the cold water inlet pipe, which solves the problem of heat loss when the cold water inlet pipe is installed on the upper part of the water heater; When the water temperature is higher than the circulating water temperature, the circulating water flows through the bypass pipe instead of entering the water tank, and will not take away the heat of the hot water in the water tank due to the low circulating water temperature. When the inner tank water temperature is lower than the circulating water temperature, the bypass pipe Disconnect, the solar circulating water enters the water tank to heat the domestic hot water in the inner tank; 5) The double tank design is adopted, the water tank is small in size and compact in structure, which not only meets the pressure requirements of domestic hot water, but also meets the normal pressure operation requirements of solar water heaters. Water pressure requirements, realizing the organic combination of solar energy and air energy in the household hot water system, and can also improve the equipment utilization rate of household air conditioning units.

Description of drawings

Fig. 1 is a schematic diagram of the relationship of the present invention in a hot water system;

Fig. 2 is a schematic diagram of the overall structure of the present invention;

Fig. 3 is a schematic view of the double-layer bile structure of the present invention;

Fig. 4 is a schematic diagram of the refrigerant heat exchange coil of the present invention;

Fig. 5 is a schematic diagram of the structure of the vacuum heat insulation pipe of the present invention.

In Figures 1 to 5: 1. Cold water inlet pipe, 2. Hot water outlet pipe, 3. Refrigerant inlet pipe, 4. Refrigerant return pipe, 5. Refrigerant heat exchanger, 6. Solar energy circulating water inlet pipe , 7. Solar circulating water outlet pipe, 8. Exhaust pipe of outer tank, 9. Vacuum insulation tube, 10. Inner tank of pressurized water tank, 11. Outer tank of water tank, 12. Shell of water tank, 13. Thermal insulation material, 14. Electric three-way reversing valve, 15. temperature sensor one, 16. temperature sensor two, 17. controller, 18. bypass pipe.

Detailed ways

In order to further understand the content, characteristics and effects of the present invention, the following embodiments are listed below, and detailed descriptions are given below with reference to the accompanying drawings.

As shown in Figure 1 to Figure 5:

Cold water inlet pipe 1, hot water outlet pipe 2, refrigerant inlet pipe 3, refrigerant return pipe 4, refrigerant heat exchanger 5, solar circulating water inlet pipe 6, solar circulating water outlet pipe 7, outer tank exhaust pipe 8. Vacuum insulation pipe 9, pressure-bearing water tank liner 10, water tank outer liner 11, water tank shell 12, thermal insulation material 13, electric three-way reversing valve 14, temperature sensor one 15, temperature sensor two 16, controller 17, Bypass pipe 18, the pressurized water tank liner 10 is placed inside the water tank outer liner 11, the top surface of the water tank outer liner 11 is in close contact with the side surface of the pressure-bearing water tank liner 10; the pressure-bearing water tank liner 10 and the water tank outer liner 11 Place it inside the water tank shell 12, and fill the gap in the water tank shell 12 with thermal insulation material 13; the cold water inlet pipe 1 is connected with the vacuum heat insulation pipe 9, and one end of the vacuum heat insulation pipe 9 is installed on the top of the water tank shell 12, and the vacuum insulation The heat pipe 9 is connected to the top of the pressurized water tank liner 10 and extends into the lower part of the pressurized water tank liner 10, the top of the pressurized water tank liner 10 is connected to the hot water outlet pipe 2, and the hot water outlet pipe 2 is connected to the water tank shell 12 Top connection; the side of the water tank shell 12 is connected to the solar circulating water inlet pipe 6, the solar circulating water inlet pipe 6 is connected to the water tank outer bladder 11, the water tank outer bladder 11 is connected to the solar circulating water outlet pipe 7, and the solar circulating water outlet pipe 7 is connected to the water tank The side of the shell 12 is connected; the upper part of the outer tank 11 is provided with an outer tank exhaust pipe 8; the refrigerant heat exchanger 5 is installed in the gap between the pressurized water tank inner tank 10 and the water tank outer tank 11, and the refrigerant heat exchanger 5 and The inner tank 10 of the pressurized water tank is in close contact; the refrigerant inlet pipe 3 enters from the upper part of the water tank shell 12 and the top of the outer tank 11, the refrigerant inlet pipe 3 is connected to the refrigerant heat exchanger 5, and the refrigerant heat exchanger 5 is connected to the The refrigerant return pipe 4 is connected, and the refrigerant return pipe 4 protrudes from the top of the water tank outer tank 11 and the upper part of the water tank shell 12;

The first temperature sensor 15 is in close contact with the outer surface of the solar circulating water inlet pipe 6, the first temperature sensor 15 is connected to the controller 17, the second temperature sensor 16 is in contact with the outer surface of the inner liner 10 of the pressurized water tank, and the second temperature sensor 16 is connected to the controller 17 ; The controller 17 controls the electric three-way reversing valve 14 according to the temperature difference between the temperature sensor one 15 and the temperature sensor two 16 .

The operation of the water tank of a kind of coil auxiliary heating double-tank solar air energy water heater of the present invention can be divided into the working condition of solar energy independent domestic hot water production and the working condition of combined solar energy and air energy hot water production. The selection of the two working conditions can be based on real-time The weather and weather forecast are comprehensively determined. When the solar radiation is sufficient, the solar domestic hot water system is turned on. When the solar radiation is not sufficient or the weather is rainy, the solar and air combined hot water system is turned on. The operation of each working mode is as follows.

The specific operation of the solar energy independent domestic hot water production condition is: the air source heat pump is powered off, the electric three-way reversing valve 14 and the controller 17 are powered on; the operating mechanism of the system in the solar independent domestic hot water production condition is: the initial control is The electric three-way reversing valve 14 is connected to the bypass pipe 18, and the water inlet pipe of the water tank is disconnected; after the solar circulating water absorbs heat in the solar collector, it circulates into the solar circulating water inlet pipe 6, and the temperature sensor 15 monitors the solar cycle in real time The water temperature in the water inlet pipe 6, the temperature sensor two 16 real-time monitoring of the water temperature of the lower part of the pressurized water tank liner 10, when the monitoring temperature of the temperature sensor one 15 is lower than the monitoring temperature of the temperature sensor two 16, the solar circulating water is a low-temperature circulation flow, not only The hot water in the pressurized water tank liner 10 cannot be heated, and even the heat of the hot water in the pressurized water tank liner 10 will be taken away. At this time, the controller 17 controls the electric three-way reversing valve 14 to make the solar circulating water inlet pipe 6 Disconnect, the bypass pipe 18 is connected, the solar circulating water does not enter the water tank outer bladder 11 and circulates through the bypass pipe 18; when the monitoring temperature of the temperature sensor one 15 is higher than the monitoring temperature of the temperature sensor two 16, the solar circulating water enters The water in the water pipe 6 can be used to heat the hot water in the pressurized water tank liner 10. At this time, the controller 17 controls the electric three-way reversing valve 14, so that the solar circulating water inlet pipe 6 is connected, and the bypass pipe 18 is disconnected. Circulating water does not enter the bypass pipe 18 but circulates through the water tank outer bladder 11 and supplies heat.

The specific operation of the combined solar and air energy hot water heating condition is as follows: the air energy heat pump is powered on, and the electric three-way reversing valve 14 and the controller 17 are powered on; the operating mechanism of the system under the combined solar and air energy hot water heating condition is: initially The control is that the electric three-way reversing valve 14 is connected to the bypass pipe 18, and the water tank inlet pipe is disconnected; the high-temperature air source heat pump refrigerant enters the refrigerant heat exchanger 5 from the refrigerant inlet pipe 3, and in the refrigerant heat exchanger 5 After the heat is released, it enters the air source heat pump through the refrigerant return pipe 4 and circulates; part of the heat in the refrigerant heat exchanger 5 is directly transferred to the inner tank 10 of the pressurized water tank, and the other part of the heat is transferred to the water around the refrigerant heat exchanger 5 , and then passed to the pressurized water tank liner 10; while the air energy heat pump is running, the controller 17 controls the electric three-way reversing valve 14 according to the real-time monitoring temperature of the temperature sensor one 15 and the temperature sensor two 16, when the temperature sensor one 15 When the monitoring temperature of the temperature sensor is lower than the monitoring temperature of the temperature sensor two 16, the solar circulating water inlet pipe 6 is disconnected, and the bypass pipe 18 is connected. When the monitoring temperature of the temperature sensor one 15 is higher than the monitoring temperature of the temperature sensor two 16, the solar cycle water The water inlet pipe 6 is connected, and the bypass pipe 18 is disconnected.

The hot water heating condition of combined solar energy and air energy includes the independent hot water heating condition of air energy, that is, when solar energy cannot produce hot water at night or during the day, the real-time monitoring temperature of temperature sensor one 15 is lower than the real-time monitoring temperature of temperature sensor two 16 temperature, the electric three-way reversing valve does not act, and the whole process produces hot water for air.

Claims (1)

1. the auxiliary hot double-bladder type solar-energy air-energy water-heater water tank of coil pipe, it is characterized in that: the present invention includes cold water inlet (1), hot water outlet pipe (2), cold-producing medium influent stream pipe (3), refrigerant reflux tube (4), refrigerant heat exchanger (5), solar energy circulating water inlet (6), solar energy circulating water outlet pipe (7), outer courage blast pipe (8), vacuum heat insulation tube (9), pressure-bearing water tank inner liner (10), the outer courage (11) of water tank, tank shell (12), insulation material (13), electric three passes reversal valve (14), temperature sensor one (15), temperature sensor two (16), controller (17), bypass pipe (18), it is inner that described pressure-bearing water tank inner liner (10) is placed in the outer courage (11) of water tank, outer courage (11) end face of water tank and pressure-bearing water tank inner liner (10) side close contact, the outer courage (11) of described pressure-bearing water tank inner liner (10) and water tank is placed in the inside of tank shell (12), and is full of insulation material (13) in space in tank shell (12), described cold water inlet (1) is connected with vacuum heat insulation tube (9), one end of vacuum heat insulation tube (9) is installed on tank shell (12) top, vacuum heat insulation tube (9) is connected with pressure-bearing water tank inner liner (10) top and stretches in pressure-bearing water tank inner liner (10) position on the lower, pressure-bearing water tank inner liner (10) top is connected with hot water outlet pipe (2), and hot water outlet pipe (2) is connected with tank shell (12) top, described tank shell (12) side is connected with solar energy circulating water inlet (6), solar energy circulating water inlet (6) is connected with the outer courage (11) of water tank, the outer courage (11) of water tank is connected with solar energy circulating water outlet pipe (7), and solar energy circulating water outlet pipe (7) is connected with tank shell (12) side, outer courage (11) top of described water tank is provided with outer courage blast pipe (8), described refrigerant heat exchanger (5) is arranged in the space between pressure-bearing water tank inner liner (10) and the outer courage (11) of water tank, refrigerant heat exchanger (5) and pressure-bearing water tank inner liner (10) close contact, described cold-producing medium influent stream pipe (3) enters from courage (11) top tank shell (12) top and water tank, cold-producing medium influent stream pipe (3) is connected with refrigerant heat exchanger (5), refrigerant heat exchanger (5) is connected with refrigerant reflux tube (4), and refrigerant reflux tube (4) stretches out from (11) top of courage water tank and tank shell (12) top, described temperature sensor one (15) contacts with solar energy circulating water inlet (6) intimate, temperature sensor one (15) is connected with controller (17), temperature sensor two (16) and pressure-bearing water tank inner liner (10) exterior surface, temperature sensor two (16) is connected with controller (17), described controller (17) controls electric three passes reversal valve (14) according to the temperature difference of temperature sensor one (15) and temperature sensor two (16).