CN201416949Y - Multi-energy heating device for building heating system - Google Patents

Abstract

The utility model relates to a multipotency source heating device for building heating system, include: the heat exchanger comprises a shell and a plurality of heat exchangers arranged in the shell, wherein the shell is provided with a cold water inlet, a domestic hot water outlet, an auxiliary heat source water inlet, an auxiliary heat source water outlet and an auxiliary heat source mounting hole; the heat exchangers comprise at least two or more groups of heat exchangers, solar energy is used as a main heat source to heat water in the shell through the bottommost group of heat exchangers, and other heat exchangers are used as floor heating or other low-temperature heat sources. A water distribution plate is also arranged in the shell, and water distribution holes are formed in the water distribution plate; the water distribution plate is positioned below the solar heat exchange coil. The heating device also comprises a digital intelligent control unit which adopts a preferential heating control strategy of preferentially using solar energy and domestic hot water. The multi-energy heating device takes renewable energy solar energy as a main heat source and conventional energy as an auxiliary heat source for heat supply, and realizes comprehensive utilization of the renewable energy and the conventional energy.

Description

Multi-energy heating installations for building heating systems

technical field

The utility model relates to a system for building heating and domestic hot water supply, in particular to a multi-energy heating device used in combination with multi-energy for the building heating system.

Background technique

At present, the heat sources used in building heating systems generally use a single conventional energy source, such as gas boilers, electric boilers and oil-fired boilers. With the tense energy structure, the utilization of renewable energy has become an inevitable trend, which is not only conducive to energy conservation and emission reduction, but also conducive to the sustainable development of energy. The so-called "solar heating" refers to a new energy-saving heating method that uses solar collectors and hot water storage tanks as a solar energy collection system to provide heat for buildings with hot water or heating.

Conventional solar heating system is composed of solar heating part, auxiliary energy guarantee part, low temperature hot water floor radiant heating system and domestic hot water supply and other parts. Among them, the solar heating system is composed of solar collectors, solar circulating water pumps and hot water storage tanks. Its function is to collect heat to the maximum through the collectors installed on the lighting surface, and store heat through the hot water storage tanks. The auxiliary energy system can be composed of various types of conventional energy. As a supplement to the solar thermal collection system, the auxiliary system can meet the heating and domestic hot water needs in continuous rainy weather or other special heating needs.

Under normal circumstances, if the solar heating system is only used for hot water supply or heating alone, a hot water storage tank is generally set up to store hot water, and transfer heat to the heating end for the heating system. If the solar system needs to supply both hot water and heating, at least one hot water storage tank and one heat exchanger need to be installed, which takes up a lot of space and increases heat loss. The ratio of height to diameter of a cylindrical hot water storage tank is generally 0.85 to 1.15. With such a ratio, the internal hot water cannot achieve a good layering effect, and the water tank does not have the function of a heat exchanger.

Utility model content

The purpose of this utility model is to provide a multi-energy heating device for building heating systems. The design of this multi-energy heating device can not only make full use of solar energy, but also meet the needs of different heating temperatures, ensuring that the building The heating quality of the object.

In order to achieve the above purpose, the utility model provides a multi-energy heating device for building heating systems, which has the following characteristics: the multi-energy heating device includes: a shell and several heat exchangers arranged in the shell, the The housing is provided with a cold water inlet, a domestic hot water outlet, an auxiliary heat source water inlet, an auxiliary heat source outlet and an auxiliary heat source installation hole; the heat exchanger includes at least two or more sets of heat exchangers, and the solar energy As the main heat source, the water in the shell is heated through the bottom group of heat exchangers, and the other heat exchangers are used as floor heating or other low-temperature heat sources.

The ratio of the diameter and height of the housing is 1:2-1:4. The ratio between the height and diameter of the shell of the heating device can make the hot water in the heating device present a gradient distribution due to different temperatures, thereby achieving the effect of temperature stratification in the shell, so that the hot water can be used at different temperature levels according to the application.

The solar heat exchanger, which is the main heating source of the housing, is located at or below the lower 1/3 of the housing. This position is conducive to sufficient heat exchange between the working medium in the heat exchanger and the cold water without disturbing the hot water in the shell.

The heat exchanger for floor heating or other low-temperature heat sources in the housing is located at or above the upper 1/2 of the housing. The temperature of hot water in this position is suitable for floor heating or other low-temperature heat.

The heat exchanger adopts a copper spiral coil. The spiral coil is set in multiple layers. The multi-layer spiral tubes are nested to increase the heat exchange area, and at the same time avoid the dead angle of heat exchange in the heating device, so as to achieve the effect of uniform heat exchange.

The housing is also provided with a water distribution plate, and the water distribution plate is provided with water distribution holes; the water distribution plate is located above the cold water inlet and below the multi-energy heating device. The water distribution plate is arranged 30-60mm below the solar heat exchanger. As a preference, the water distribution plate is arranged 50mm directly below the heat exchange coil. The function of setting the water distribution plate is to make the cold water in the shell evenly distributed, and evenly wash the spiral heat exchange coil, so as to enhance the heat transfer coefficient. Evenly opening water distribution holes directly under the heat exchange coil not only makes the cold water in the heating device evenly distributed, but also reduces the disturbance of the cold water in the lower part of the shell to the hot water in the upper part, which is conducive to the stratification of hot water.

The cold water inlet of the solar heat exchanger is set at the lower part of the shell, at or below 50 mm below the water distribution plate; the domestic hot water supply port is set at the upper part of the shell, at or above 50 mm above the floor heating heat exchange coil . The water inlet of the auxiliary heat source is arranged in the middle of the casing. The water outlet of the auxiliary heat source is arranged between 1/3 and 1/4 of the upper part of the casing. The auxiliary heat source installation hole is set between 1/3 and 1/4 of the upper part of the casing. The effect of the auxiliary heat source installation hole is to install the electric heating heat source. The opening positions of the heating device's cold water inlet, domestic hot water supply port, auxiliary heat source water inlet, auxiliary heat source outlet and auxiliary heat source installation hole on the heating device housing and the installation position of the heat exchange coil in the housing, It can ensure the full application of renewable energy, sufficient heat exchange, stable heat supply, and the effect of saving conventional energy.

The heating device also includes a digital intelligent control unit, which adopts a heating control strategy that prioritizes the use of solar energy and domestic hot water. It adopts digital intelligent control unit, which is characterized by reliable operation, easy use and easy operation.

The multi-energy heating device of the utility model mainly uses solar energy as a heat source, and the hot water heated by the solar heat collector returns to the solar heat collector after heating the cold water in the housing of the device. After the cold water enters the heating device, the cold water is evenly distributed by the water distribution plate and heated by the heat exchanger. The heated hot water is directly supplied to the end of the water as domestic hot water, and at the same time, heats the low-temperature heating hot water heat exchanger; When the temperature is normal, turn on the auxiliary heat source to ensure the normal operation of the system.

The utility model has the advantage that the multi-energy heating device can use multiple energy sources in combination, with renewable energy solar energy as the main heat source and conventional energy as the auxiliary heat source for heating, achieving comprehensive utilization of renewable energy and conventional energy, Prioritize the use of renewable energy and reduce the use of conventional energy.

In addition, the multi-energy heating device uses solar energy and conventional energy sources (gas boilers, electric heating tubes, and oil-fired boilers, etc.) as heat sources to heat the cold water in the housing of the device. It is used for domestic hot water; the second is used as a heat source for floor heating or other low-temperature heat. This device simultaneously functions as a heat source and a heat exchanger.

Moreover, compared with the conventional solar heating system, the multi-energy heating device uses the ratio of the height and diameter of the shell to achieve the temperature stratification effect of the hot water in the shell, so that the hot water can be used in different temperature levels according to the purpose; that is, it can not only be used as A domestic hot water storage tank, and it can be used as a heat exchanger to provide heat sources for floor heating systems or other low-temperature heat sources; while conventional solar heating systems require separate domestic hot water storage tanks and heating water tanks. It can be seen that the multi-energy heating device integrates the domestic hot water tank and the heating water tank of the conventional system, which truly saves energy, saves raw materials, and reduces the occupied space.

Description of drawings

Fig. 1 is a schematic structural view of a multi-energy heating device of the present invention;

Fig. 2 is a schematic structural view of the water distribution plate in the multi-energy heating device of the present invention;

Fig. 3 is another schematic structural view of the water distribution plate in the multi-energy heating device of the present invention;

Fig. 4 is another schematic structural view of the water distribution plate in the multi-energy heating device of the present invention.

Reference sign

1. Solar collector 2. Auxiliary heat source 3. Water distribution board

4. Floor heating water supply Tg 5. Floor heating return water Th 6. Domestic hot water supply

7. Cold water intake 8. Solar water supply 9. Solar backwater

10. Domestic hot water temperature sensor T ₁ 11. Hot water temperature sensor in the shell T ₀

12. Cold water temperature sensor T _s in the shell 13. Solar collector outlet temperature sensor T _j

14. Safety valve 15. Sewage pipe 16. Water distribution hole

17. Solar heat exchange coil 18. Floor heating heat exchange coil 19. Auxiliary heat source installation hole

Detailed ways

The multi-energy heating device of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the utility model provides a multi-energy heating device for building heating systems, including:

The housing and several heat exchangers arranged in the housing, the housing is provided with a cold water inlet 7 and a domestic hot water outlet 6; the upper part of the housing is provided with a safety valve 14, when the system is overpressured, Open the safety valve 14 to release the pressure; the bottom of the housing is provided with a drainpipe 15, and when the multi-functional heating device needs to be cleaned, rely on the drainpipe 15 to discharge water.

Solar heat collector 1, the hot water heated by solar heat collector 1 passes through solar water supply 8, passes through the coil 17 of the solar heat exchanger, and then passes through solar return water 9, heats the cold water in the device shell and returns to the solar energy. Collector;

The external cold water is directly sent to the bottom of the water distribution plate 3 through the cold water inlet 7, and the cold water is evenly distributed by the water distribution plate 3 and heated by the solar heat exchanger 17. The heated hot water is directly supplied to the water terminal as domestic hot water, and at the same time , heating the low-temperature heating hot water heat exchange coil 18. When the solar energy cannot guarantee the normal temperature of the system, turn on the auxiliary heat source to ensure the normal operation of the system. In this example, a gas furnace 2 or an electric heater can be used. The auxiliary heat source installation hole 19 reserved for installing the electric heater on the housing.

Also includes:

The low-temperature heating hot water heat exchange coil 18 and the floor heating return water 5 flow through the low-temperature heating hot water heat exchange coil and are heated by the hot water in the shell, and then flow out from the floor heating water supply 4 to realize heating.

In this example, the ratio of the diameter and height of the housing is 1:3, and a water distribution plate 3 is also arranged in it, and a water distribution hole 16 is opened on the water distribution plate, and the water distribution hole is arranged on the replacement wall. 50mm directly below the heat coil. The setting of the water distribution holes, as shown in Figure 2-4, can adopt various layouts, so that the cold water in the heating device can be evenly distributed, and the disturbance of the cold water to the hot water in the shell can be reduced.

In this example, the heat exchanger adopts copper spiral coils. In actual application, the solar heat exchanger can be set up with multi-layer spiral coils to increase the heat exchange area, and at the same time avoid causing dead heat transfer of the heating device to achieve uniformity. The effect of heat exchange.

In this example, the heating device also adopts a digital intelligent control unit, and adopts a heating control strategy that prioritizes the use of solar energy and domestic hot water. The control strategy, namely:

Control 1: When T ₁ ≤ 45°C, conventional energy starts;

Control 2: When T ₀ ≤ T _h , the conventional energy starts;

Control 3: When T ₀ ≤ 27°C, the conventional energy starts;

Control 4: When T ₁ ≥ 55°C and T ₀ >T _h and T ₀ > 27°C, the conventional energy source stops;

Control 5: When T _j -T _s ≥ 10°C, the solar energy starts.

Where: T ₁ ——the temperature of domestic hot water temperature sensor;

T ₀ ——The temperature of the hot water temperature sensor in the casing;

T _h ——floor heating return water temperature;

T _j —— collector outlet temperature;

T _s ——The temperature of the cold water temperature sensor in the casing.

Claims (10)

1, a kind of multifunctional heating device that is used for building heating system, it is characterized in that, this multifunctional heating device comprises: housing and the some heat exchangers that are arranged in the housing, and described housing is provided with cold water inlet, domestic hot-water's delivery port, auxiliary thermal source water inlet, auxiliary thermal source delivery port and auxiliary thermal source installing hole;

Described heat exchanger comprises two groups or more heat exchanger at least, and wherein, as main heating thermal source, other heat exchangers are as floor heating or other low temperature thermals source with solar energy for one group of heat exchanger.

2, the heater in multipotency according to claim 1 source is characterized in that, the ratio of the diameter of described housing and height adopted 1: 2～1: 4.

3, multifunctional heating device according to claim 1 is characterized in that, the solar heat exchanger of main heating thermal source is positioned at 1/3 place, housing bottom or following in the described housing.

4, multifunctional heating device according to claim 1 is characterized in that, in the described housing floor heating or other low temperature with the thermal source heat exchanger be positioned at housing internal upper part 1/2 place or more than.

5, the heater in multipotency according to claim 1 source is characterized in that described heat exchanger adopts copper spiral coil, the setting that is nested of spiral coil multilayer.

6, multifunctional heating device according to claim 1 is characterized in that, is provided with water distributing plate in the described housing, offers water distributing pore on this water distributing plate; Water distributing plate is positioned at solar heat-exchange coil pipe below 30～60mm.

7, the heater in multipotency according to claim 1 source is characterized in that described solar heat exchanger cold water inlet is arranged on lower part of frame, be positioned at water distributing plate 50mm place, below or below;

Described domestic hot-water feed water inlet is arranged on the top of housing, be positioned at 50mm place, floor heating heat exchange coil top or more than.

8, the heater in multipotency according to claim 1 source is characterized in that, described auxiliary thermal source water inlet is arranged on the housing middle part;

Described auxiliary thermal source delivery port is arranged between the place, 1/3 place to 1/4, housing top.

9, the heater in multipotency according to claim 1 source is characterized in that described auxiliary thermal source installing hole is arranged between the place, 1/3 place to 1/4, housing top.

10, the heater in multipotency according to claim 1 source is characterized in that described heater also comprises digital intelligent chemical control system unit, adopts preferentially to use solar energy and domestic hot-water preferentially to heat control strategy.

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