CN209639098U - Host for cascade heating multi-energy complementary water circulation floor heating system - Google Patents

Abstract

The utility model discloses a kind of step heating multi-energy complementation type water to recycle ground heating system host, belong to heating technology field, including heat-exchanging water tank (46), the interface 11 (21) of the heat-exchanging water tank (46) is successively connected in series with electric three-way regulating valves (9), water circulating pump two (5) and heating and supplying water interface (27), the electric three-way regulating valves (9) are also connected with the interface 12 (22) of heat-exchanging water tank (46) and heating water return interface (26), and the interface 12 (22) of the heat-exchanging water tank (46) is connected with the heating water return interface (26)；It is provided with heating coil one (4) in the heat-exchanging water tank (46), the both ends of the heating coil one (4) are separately connected solar energy interface one (28) and solar energy interface two (29).The utility model can satisfy In Middle And Lower Reaches of Changjiang River heating energy requirement.

Description

Host for cascade heating multi-energy complementary water circulation floor heating system

technical field

The utility model relates to a host for a cascade heating multi-energy complementary water circulation floor heating system, in particular to a cascade heating multi-energy complementary water circulation floor heating host suitable for the middle and lower reaches of the Yangtze River, and belongs to the technical field of heating.

Background technique

In the field of heating, water circulation floor heating is widely used. Most of the common hosts of water circulation floor heating are gas-fired wall-hung boilers fueled by natural gas or liquefied gas, and there are also oil-fired and electric heating types. Excessive consumption is relatively rare. The development of gas-fired type has begun to be constrained by the tight supply of gas sources in my country. The situation is even more serious in the middle and lower reaches of the Yangtze River in China, because the northern region, as a traditional heating area, has sufficient gas source preparations and a wide coverage of central heating. , while the original gas supply capacity of many cities in the middle and lower reaches of the Yangtze River did not consider this demand, so there was a corresponding gap. But in the middle and lower reaches of the Yangtze River, the outdoor temperature is not very low most of the time in winter, so air source heat pumps can play a role, and the energy efficiency ratio of air source heat pumps is much higher than that of electric heating devices. In addition, in the middle and lower reaches of the Yangtze River, there are quite a few days in winter The proportion is the weather with sufficient sunshine. In the case of abundant sunshine, solar energy can also supplement heat. If multiple energy sources are rationally combined and utilized in stages, the above contradictions can be alleviated. Therefore, the development purpose of this device is to achieve multi-energy cascade heating. Through reasonable The design improves energy efficiency.

Utility model content

The technical problem to be solved by the utility model is to provide a cascaded heating multi-energy complementary water circulation floor heating system main engine suitable for the middle and lower reaches of the Yangtze River, which can meet the heating and energy saving requirements of the middle and lower reaches of the Yangtze River.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

The host machine for cascade heating multi-energy complementary water circulation floor heating system includes a water exchange tank. The interface eleven of the water exchange tank is connected in series with the electric three-way regulating valve, the circulating water pump two and the heating water supply interface in sequence. The electric three-way adjustment The valve is also connected with the interface twelve of the water exchange tank and the heating return water interface, and the interface twelve of the water exchange tank is connected with the heating return water interface; the heating coil one is arranged in the water exchange tank, and the The two ends of heating coil one are respectively connected to solar interface one and solar interface two;

The electric heater is also arranged in the heat exchange tank, and the electric heater is located under the heating coil one;

The interface ten of the water exchange tank is respectively connected with the second interface of the electric three-way valve two and the interface six of the heat exchanger two, and the third interface of the electric three-way valve two is connected with the second interface of the heat exchanger two. The port five is connected, the port five and the port six are connected inside the heat exchanger two, the port seven of the heat exchanger two is connected with the hot water outlet, the port eight of the heat exchanger two is connected with the tap water inlet, and the The interface nine of the heat exchange tank is sequentially connected with the closed expansion tank, the circulating water pump one and the interface two of the heat exchanger one, and the interface one and the two interfaces of the heat exchanger one are connected inside the heat exchanger one; Interface one of device one is connected with the third interface of said electric three-way valve one, the automatic exhaust valve is connected with the second interface of said electric three-way valve one, the safety valve is connected with the first interface of electric three-way valve one and The first interface of the electric three-way valve two is connected in series;

The two ends of the heating coil two are respectively connected with the safety valve and the automatic exhaust valve, and the heating coil two, a natural gas nozzle and an ignition needle are arranged in the furnace, and the natural gas nozzle is located on the bottom surface of the furnace Above, the ignition needle is located above the gas outlet of the natural gas nozzle, the heating coil 2 is located in the middle of the furnace, and the furnace is set in the shell of the indoor unit, which is passed through the exhaust fan and the cooling fan. The agent pipeline is connected with the outer shell of the outdoor unit; the outer shell of the indoor unit is provided with an air inlet, the air outlet of the air inlet is connected with the furnace, and the natural gas nozzle is connected with the natural gas interface through the gas pipe;

The compressor, the four-way valve, the throttling element, the evaporator and the fan are arranged in the shell of the outdoor unit, and the interface three of the heat exchanger is connected to the first interface of the four-way valve through the refrigerant pipeline. The second port of the four-way valve is connected to one end of the compressor, the other end of the compressor is connected to the third port of the four-way valve, and the fourth port of the four-way valve is connected to the One end of the evaporator is connected, the other end of the evaporator is connected with one end of the throttling element, the other end of the throttling element is connected with the interface 4 of the heat exchanger one, and the evaporator is set There is said fan.

Both the first heat exchanger and the second heat exchanger include any one of a plate heat exchanger, a casing heat exchanger, and a shell and tube heat exchanger.

The throttling element includes a thermal expansion valve or an electronic expansion valve.

The fan is an axial fan.

A high-temperature refrigerant is arranged in the heat exchanger one.

The material of the evaporator is stainless steel.

The function of heat exchanger 1 is to realize the condensation and heat release of high-temperature refrigerant, from gas to liquid, and the released heat is absorbed by water;

The function of the second heat exchanger is to exchange heat between the tap water and the heating hot water flowing through the heat exchanger, and the tap water is heated;

The function of circulating water pump 1 is to provide primary side water circulation power; (definition of primary side: heat exchanger 1, heat exchanger 2, heating coil 2, these three heat exchangers and the connecting waterway between them);

The function of the heating coil one is that the solar thermal fluid flows through it and heats the water in the heat exchange tank;

The function of circulating water pump 2 is to provide secondary side water circulation power; (definition of secondary side: the hot water generated by the host is output to the floor heating system, including the electric three-way regulating valve, circulating water pump 2 and the connecting waterway between them);

The function of the electric heater is to heat the water in the heat exchange tank;

The function of the electric three-way valve one is to switch the direction of the primary side waterway;

The function of the electric three-way valve 2 is to switch the direction of the primary side waterway;

The function of the electric three-way regulating valve is to change the opening of the two inlets to realize the change of the water inlet ratio;

The function of the closed expansion tank is to accommodate the expansion volume after the water is heated;

The function of interface 1 and interface 2 is the connection between the primary side waterway and heat exchanger 1;

Port three and port four are used as the connection between the refrigerant pipeline and heat exchanger one;

Port five and port six are the connection ports between the primary side waterway and heat exchanger two;

The function of interface 7 and interface 8 is the connecting port of domestic hot water waterway and heat exchanger 2;

Interface nine (primary side) and interface ten (primary side) are the connection ports between the primary side of the waterway and the heat exchange tank;

Interface 11 (secondary side) and interface 12 (secondary side) are the connection ports between the secondary side of the waterway and the heat exchange tank;

The function of the tap water inlet is to connect the water source;

The function of the hot water outlet is to connect the heated tap water to the domestic hot water pipeline;

The function of the natural gas interface is to connect the gas source;

The function of the heating return water interface is to connect the return water of the floor heating pipeline;

The function of the heating water supply interface is to connect the water supply of the floor heating pipeline;

The function of solar interface 1 and solar interface 2 is to connect the solar circulation pipeline;

The role of the ignition needle is to emit an electric spark to ignite the natural gas;

The function of the natural gas nozzle is to release the natural gas according to the set pressure and flow;

The function of the second heating coil is that the water in it is heated by the flue gas produced by the combustion of natural gas;

The function of the safety valve is to release pressure when the system is overpressured;

The function of the automatic exhaust valve is to remove the air in the system;

The function of the gas pipe is a natural gas channel;

The function of the compressor is to compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas;

The function of the four-way valve is to switch the flow direction of the refrigerant. When defrosting is required, the exhaust gas of the compressor enters the outdoor evaporator for hot gas defrosting. After defrosting, it switches back to the original heating condition;

The function of the throttling element is to throttle the high-pressure refrigerant liquid to make it a low-temperature and low-pressure vapor-liquid mixture;

The function of the evaporator is that the refrigerant in the tube absorbs heat from the air flow flowing outside the evaporator tube, and changes from a low-temperature and low-pressure gas-liquid mixture to a low-temperature and low-pressure gaseous refrigerant;

The function of the fan is to make the air flow flow through the evaporator tube bundle according to the design flow;

The function of the outdoor unit shell is to accommodate the corresponding outdoor components;

The function of the shell of the indoor unit is to accommodate the corresponding indoor components;

The function of the air inlet is to allow air to enter the furnace for combustion;

The function of the smoke exhaust fan is to exhaust the combustion smoke in the furnace;

The refrigerant pipeline is the refrigerant flow path;

The heat exchange tank is to hold a certain volume of primary side water, and can complete solar heating or electric auxiliary heating;

The function of the furnace is to form the space required for natural gas combustion.

The utility model provides a cascade heating multi-energy complementary water circulation floor heating system main engine. With this device, the intelligent cleaning of the floor heating pipeline can be realized. As long as the heating and water supply interface of the present invention is opened, the floor heating and cleaning liquid tanks can be connected in series. In the pipeline, then start the circulating water pump 2, discharge and re-inject clean water after the set time to complete the cleaning, prevent scaling, improve heat exchange efficiency, and achieve the purpose of energy saving. The utility model realizes four-level cascade heating, which are solar heating by first-level heating, high-temperature refrigerant exothermic heating by second-level heating (that is, air source heat pump heating), natural gas heating by third-level heating, and fourth-level heating Electric heating for heating; the energy consumption of the four-level cascade heating becomes higher in turn, and the utility model optimizes the heating mode with low energy consumption under different heating demands, so as to realize energy saving and emission reduction. At the same time, the utility model realizes the supply of domestic hot water and can adapt to the change of the heating load, and has a reasonable design and a high degree of intelligence.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Among them: 1. Heat exchanger 1; 2. Heat exchanger 2; 3. Circulating water pump 1; 4. Heating coil 1; 5. Circulating water pump 2; 6. Electric heating; 7. Electric three-way valve 1; 8. Electric three-way valve two; 9. Electric three-way regulating valve; 10. Closed expansion tank; 11. Interface one; 12. Interface two; 13. Interface three; 14. Interface four; 15 Interface five; 16. Interface six; 17. Interface seven; 18. Interface eight; 19. Interface nine; 20. Interface ten; 21. Interface eleven; 22. Interface twelve; 23. Tap water inlet; 24. Hot water outlet; 25. Natural gas interface; 26. Heating return water interface; 27. Heating water supply interface; 28. Solar energy interface 1; 29. Solar energy interface 2; 30. Ignition needle; 31. Natural gas nozzle; 32. Heating coil 2; 33. Safety valve; Valve; 35, gas pipe; 36, compressor; 37, four-way valve; 38, throttling element; 39, evaporator; 40, fan; 41, outdoor unit shell; 42, indoor unit shell; 43, air intake 44. Exhaust fan; 45. Refrigerant pipeline; 46. Exchange water tank; 47. Furnace.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1, the host computer for the cascade heating multi-energy complementary water circulation floor heating system includes a water exchange tank 46, and the interface 11 21 of the water exchange tank 46 is sequentially connected with the electric three-way regulating valve 9, the circulating water pump 2 5 and the heating system. The water supply interface 27 is connected in series, and the electric three-way regulating valve 9 is also connected with the interface twelve 22 of the heat exchange tank 46 and the heating return water interface 26, and the interface twelve 22 of the heat exchange tank 46 is connected with the heating return water The interface 26 is connected; the heat exchange tank 46 is provided with a heating coil one 4, and the two ends of the heating coil one 4 are respectively connected to the solar energy interface 1 28 and the solar energy interface 2 29;

The electric heater 6 is also arranged in the heat exchange tank 46, and the electric heater 6 is located below the heating coil one 4; the electric heater 6 heats the heating coil one 4, and the heating coil one 4. The outlet water is heated by water circulation floor heating;

The interface ten 20 of the heat exchange tank 46 is respectively connected with the second interface of the electric three-way valve two 8 and the interface six 16 of the heat exchanger two 2, and the third interface of the electric three-way valve two 8 is connected with the The interface five 15 of the heat exchanger two 2 is connected, the five interface 15 is connected with the interface six 16 inside the heat exchanger two 2, the interface seven 17 of the heat exchanger two 2 is connected with the hot water outlet 24, and the The interface eight 18 of the heat exchanger two 2 is connected with the tap water inlet 23, and the interface nine 19 of the heat exchange tank 46 is connected with the closed expansion tank 10, the circulating water pump one 3 and the interface two 12 of the heat exchanger one 1 in turn, so The interface one 11 of the heat exchanger one 1 is connected with the interface two 12 inside the heat exchanger one 1; the interface one 11 of the heat exchanger one 1 is connected with the third interface of the electric three-way valve one 7, automatically The exhaust valve 34 is connected to the second interface of the electric three-way valve one 7, and the safety valve 33 is connected in series with the first interface of the electric three-way valve one 7 and the first interface of the electric three-way valve two 8;

The two ends of the heating coil 2 32 are respectively connected with the safety valve 33 and the automatic exhaust valve 34, the furnace 47 is provided with the heating coil 2 32, a natural gas nozzle 31 and an ignition needle 30, the natural gas The nozzle 31 is located on the bottom surface of the furnace 47, the ignition needle 30 is located above the gas outlet of the natural gas nozzle 31, the heating coil 2 32 is located in the middle of the furnace 47, and the furnace 47 is arranged on the indoor unit. Inside the housing 42, the indoor unit housing 42 is connected to the outdoor unit housing 41 through the smoke exhaust fan 44 and the refrigerant pipeline 45; the indoor unit housing 42 is provided with an air inlet 43, and the air inlet 43 The gas outlet of the gas outlet is connected with the furnace 47, and the natural gas nozzle 31 is connected with the natural gas interface 25 through the gas pipe 35;

The compressor 36, the four-way valve 37, the throttling element 38, the evaporator 39 and the fan 40 are arranged in the casing 41 of the outdoor unit, and the interface 3 13 of the heat exchanger 1 passes through the refrigerant pipeline 45 and The first port of the four-way valve 37 is connected, the second port of the four-way valve 37 is connected with one end of the compressor 36, and the other end of the compressor 36 is connected with the third port of the four-way valve 37. The fourth port of the four-way valve 37 is connected to one end of the evaporator 39, the other end of the evaporator 39 is connected to one end of the throttling element 38, and the other end of the throttling element 38 One end is connected to the interface 4 14 of the heat exchanger 1 , and the fan 40 is arranged on the evaporator 39 .

The host can be connected (or connected externally) to the solar collector through the first solar interface 28 and the second solar interface 29. When the temperature of the collector is higher than the set temperature and the temperature of the liquid in the solar circulation pipeline is higher than 40°C, the solar cycle The pipeline can be used to heat the water in the heat exchange tank 46; this is the first level of heating, and the heat source is completely free;

When the water in the heat exchange tank 46 is lower than the set temperature, according to the conventional working conditions of water circulation floor heating, usually not exceeding 55°C, the circulating water pump one 3 works, and the water in the heat exchange tank 46 enters the heat exchanger through the interface two 12 -1; At this time, the compressor 36, the four-way valve 37, the throttling element 38, the evaporator 39, and the fan 40 work to complete the heat pump cycle, and the high-temperature refrigerant condenses and releases heat in the heat exchanger -1 to complete the heating of the water; The heated water flows out from the interface one 11; this is the second level of heating, and the heat source is the above-mentioned components in the outer casing 41;

If the water temperature condition of the heat exchange tank 46 can meet the heating load under the condition of the second stage heating, the electric three-way valve one 7 maintains a horizontal flow, and the hot water coming out of the interface one 11 does not enter the heating coil two 32, and passes through Electric three-way valve one 7 flows horizontally and then enters electric three-way valve two 8, electric three-way valve two 8 opens vertically, water does not enter heat exchanger two 2, and directly enters heat exchange through interface ten 20 (primary side) water tank 46;

If the water temperature condition of the heat exchange tank 46 does not meet the heating load under the condition of the second-stage heating, the electric three-way valve one 7 is changed to vertical flow, and the hot water from the interface one 11 enters the heating coil two 32, and the natural gas The gas pipe 35 enters the furnace 47 from the natural gas nozzle 31, and the smoke exhaust fan 44 starts to cause negative pressure in the furnace 47, and the air enters the furnace 47 from the air inlet 43. After the ignition needle 30 is ignited, high-temperature smoke is generated, and the heating coil 2 The water in 32 is further heated and flows to the electric three-way valve two 8; this is the third level of heating, and the heat source is the high-temperature flue gas produced by natural gas combustion; when there is no demand for domestic hot water, the electric three-way valve The flow direction of two 8 is the same as the expression in the second stage heating, and the heated water in the heating coil two 32 directly enters the heat exchange tank 46 from the interface ten 20 (primary side);

When there is a demand for domestic hot water, the flow direction of the electric three-way valve 2 8 is changed to the horizontal direction, and the water heated in the heating coil 2 32 enters the heat exchanger 2 2 through the interface 5 15, and enters through tap water The cold water entering in 23 enters into heat exchanger 2 through interface 8 18, and the two streams of cold and hot water exchange heat. After the cold water is heated, it flows out of heat exchanger 2 through interface 7 17, and then passes through hot water outlet 24 and domestic hot water Pipeline connection, so that the host can supply domestic hot water while meeting the needs of floor heating;

When the natural gas source is shut down due to municipal reasons, the gas is limited, or the combustion device is faulty, which makes the third-level heating unusable, and the water temperature condition of the heat exchange tank 46 does not meet the heating load under the second-level heating, The electric heater 6 can be started to heat the water in the heat exchange tank 46, which is the fourth level of heating, but because the electric heating is economically the worst, this level of heating is only used as a backup under special circumstances.

When the third level of heating is also enabled, the flue gas with residual heat discharged by the exhaust fan 44 enters the evaporator 39, and the evaporator 39 is made of stainless steel to prevent corrosion of the flue gas after condensation, and the residual heat of the flue gas can be evaporated The device 39 absorbs, firstly, the waste heat of the flue gas is recovered, and secondly, the heating coefficient of the heat pump cycle of the outdoor unit can be improved.

The working conditions of the secondary side are as follows: the circulating water pump 25 is running, and can send the hot water in the heat exchange tank 46 to the floor heating circulation pipeline, and make the cooled water reenter the heat exchange tank 46 to be heated; when the heating load When the temperature is low, the return water temperature of the floor heating circulation pipeline will rise. When the set temperature is reached, the electric three-way regulating valve 9 and the side of the interface 11 21 will be closed to reduce the water temperature supply to adapt to the change of the heating load. .

Both the first heat exchanger 1 and the second heat exchanger 2 include any one of a plate heat exchanger, a sleeve-and-tube heat exchanger, and a shell-and-tube heat exchanger. Preference is given to plate heat exchangers.

The throttling element 38 includes a thermal expansion valve or an electronic expansion valve.

The fan 40 is an axial fan.

The above is only a preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the utility model. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (6)

1. step heats multi-energy complementation type water and recycles ground heating system host, it is characterised in that: including heat-exchanging water tank (46), institute The interface 11 (21) for stating heat-exchanging water tank (46) successively connects with electric three-way regulating valves (9), water circulating pump two (5) and heating and supplying water Mouth (27) is connected in series, and the electric three-way regulating valves (9) also connect with the interface 12 (22) of heat-exchanging water tank (46) and heating water return Mouth (26) is connected, and the interface 12 (22) of the heat-exchanging water tank (46) is connected with the heating water return interface (26)；The heat exchange It is provided with heating coil one (4) in water tank (46), the both ends of the heating coil one (4) are separately connected solar energy interface one (28) With solar energy interface two (29)；

It is additionally provided with the electric heater (6) in the heat-exchanging water tank (46), the electric heater (6) is located at the heating coil Below one (4)；

The interface ten (20) of the heat-exchanging water tank (46) respectively with the second interface of electric T-shaped valve two (8) and heat exchanger two (2) Interface six (16) be connected, interface five (15) phase of the third interface of the electric T-shaped valve two (8) and the heat exchanger two (2) Even, the interface five (15) is connected inside heat exchanger two (2) with interface six (16), the interface seven of the heat exchanger two (2) (17) it is connected with hot water outlet (24), the interface eight (18) of the heat exchanger two (2) is connected with running water inlet (23), described to change The interface nine (19) of boiler (46) the successively interface with closed expansion tank (10), water circulating pump one (3) and heat exchanger one (1) Two (12) are connected, and the interface one (11) of the heat exchanger one (1) is connected inside heat exchanger one (1) with interface two (12)；It is described The interface one (11) of heat exchanger one (1) is connected with the third interface of electric T-shaped valve one (7), automatic exhaust steam valve (34) and the electricity The second interface of dynamic triple valve one (7) is connected, the first interface and electric T-shaped valve of safety valve (33) and electric T-shaped valve one (7) The first interface of two (8) is connected in series；

The both ends of the heating coil two (32) are connected with the safety valve (33) and automatic exhaust steam valve (34) respectively, burner hearth (47) It is inside provided with plus the hot coil two (32), natural gas nozzle (31) and ignition electrode (30), the natural gas nozzle (31) is located at On the bottom surface of the burner hearth (47), the ignition electrode (30) is located above the gas outlet of the natural gas nozzle (31), described to add Hot coil two (32) is located at the middle part of the burner hearth (47), and the burner hearth (47) is set in indoor unit shell (42), the room Interior machine shell (42) is connected by smoke exhaust fan (44) and refrigerant line (45) with casing of outdoor (41)；Outside the indoor unit It is provided on shell (42) free-air diffuser (43), the gas outlet of the free-air diffuser (43) is connected with burner hearth (47), described Natural gas nozzle (31) is connected by fuel gas conduit (35) with natural gas interface (25)；

Be provided in the casing of outdoor (41) compressor (36), four-way valve (37), restricting element (38), evaporator (39) and The interface three (13) of fan (40), the heat exchanger one (1) passes through refrigerant line (45) and the first of the four-way valve (37) Interface is connected, and the second interface of the four-way valve (37) is connected with one end of the compressor (36), the compressor (36) The other end is connected with the third interface of the four-way valve (37), the 4th interface of the four-way valve (37) and the evaporator (39) One end be connected, the other end of the evaporator (39) is connected with one end of the restricting element (38), the restricting element (38) the other end is connected with the interface four (14) of the heat exchanger one (1), is provided with the fan on the evaporator (39) (40).

2. step heating multi-energy complementation type water according to claim 1 recycles ground heating system host, it is characterised in that: The heat exchanger one (1) and heat exchanger two (2) are including appointing in plate heat exchanger, double pipe heat exchanger, shell and tube exchanger It anticipates one kind.

3. step heating multi-energy complementation type water according to claim 1 recycles ground heating system host, it is characterised in that: The restricting element (38) includes heating power expansion valve or electric expansion valve.

4. step heating multi-energy complementation type water according to claim 1 recycles ground heating system host, it is characterised in that: The fan (40) is axial flow blower.

5. step heating multi-energy complementation type water according to claim 1 recycles ground heating system host, it is characterised in that: High temperature refrigerant is provided in the heat exchanger one (1).

6. step heating multi-energy complementation type water according to claim 5 recycles ground heating system host, it is characterised in that: The material of the evaporator (39) is stainless steel.