Household heating and hot water multi-energy complementary system

Abstract

The utility model discloses a household heating and hot water multi-energy complementary system which comprises an air source heat pump unit, a heat supply unit, a heat / cold water storage tank and an intelligent temperature controller. The heat supply unit is used for providing domestic hot water and heating; the air source heat pump unit is used for refrigerating or heating; the intelligent temperature controller controls starting and stopping of the end equipment, the valves and the heat supply unit through preset logic. The heat storage water tank stores heat energy and domestic water; in summer, the air source heat pump unit or the heat supply unit provides domestic hot water, and meanwhile the air source heat pump unit conducts refrigeration; in winter, the air source heat pump unit conducts heating and provides domestic hot water, and when the heating capacity of the air source heat pump unit is insufficient, the intelligent temperature controller controls the air source heat pump unit and the heat supply unit to conduct heating jointly, or only the gas machine is controlled to conduct heating, and enough domestic hot water is provided. According to the utility model, the household heating and water heating system is more stable, and the damage of the unit caused by the repeated switching of the refrigerant and the compressor is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of household heating equipment manufacturing, in particular to a multi-energy complementary system for household heating and hot water. Background Art

[0002] As living standards improve, people's quality of life improves, and their requirements for summer cooling, winter heating and year-round domestic hot water also increase.

[0003] In the prior art, the system that provides heating, cooling and domestic hot water is an air-to-air heat pump trigeneration system, but it currently has major disadvantages. When heating in winter, the heat pump does not produce enough hot water, which can easily lead to a drop in the heating temperature of the house.

[0004] The alternating control of the three modes of heating, cooling and domestic hot water also places higher control requirements on refrigerants, compressors, etc. The electronic control system is more complicated. Some trigeneration users even experience insufficient hot water supply or refrigerant leakage after installation, making it untrustworthy to consumers.

[0005] Therefore, how to improve the stability of home heating and hot water systems so that they will not be damaged by repeated switching of refrigerants and compressors, and will not affect comfort due to performance degradation of heat pump units in cold winter has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] In view of the above-mentioned defects of the prior art, the utility model provides a multi-energy complementary system for household heating and hot water, the purpose of which is to improve the stability of the household heating and hot water system so that the unit will not be damaged due to repeated switching of the refrigerant and the compressor, and the comfort will not be affected by the performance degradation of the heat pump unit in the cold winter.

[0007] To achieve the above-mentioned purpose, the utility model discloses a multi-energy complementary system for household heating and hot water, including an air source heat pump unit, a heating unit, a heat storage / cold water tank and an intelligent thermostat.

[0008] Wherein, the heating unit is used to provide domestic hot water and heating;

[0009] The air source heat pump unit performs cooling or heating;

[0010] The intelligent thermostat controls the start and stop of the terminal equipment, valves, and the air source heat pump unit and the heating unit through preset logic;

[0011] The heat storage / cold water tank stores heat energy and domestic water;

[0012] In summer, the air source heat pump unit or the heating unit provides domestic hot water, while the air source heat pump unit performs cooling;

[0013] In winter, the air source heat pump unit heats and provides domestic hot water, and when the heating capacity of the air source heat pump unit is insufficient, the intelligent thermostat controls the air source heat pump unit and the heating unit to heat together, or controls only the heating unit to heat, so as to provide sufficient domestic hot water.

[0014] Preferably, the air source heat pump unit provides cooling or heating through a fan disk and provides heating through floor heating.

[0015] Preferably, the terminal device is a fan coil, floor heating, hot water faucet or shower.

[0016] Preferably, the heating unit is a gas unit, which provides heating through a fan disk and provides heating through floor heating; the domestic hot water area of ​​the heat storage / cold water tank is provided with a coil and a water inlet, and water is replenished through the water inlet.

[0017] Preferably, the output port of the air source heat pump unit is provided with a first electromagnetic three-way valve, and the input port is provided with a second electromagnetic three-way valve;

[0018] The first electromagnetic three-way valve includes three first electromagnetic connection ends, the first first electromagnetic connection end is connected to the output port of the air source heat pump unit, the second first electromagnetic connection end is connected to the heat storage / cold area of ​​the heat storage / cold water tank, and the third first electromagnetic connection end is respectively connected to the heat supply machine output port of the heating unit, the heat storage / cold area of ​​the heat storage / cold water tank, and the coil of the domestic hot water area of ​​the heat storage / cold water tank through three parallel branch pipes;

[0019] The branch pipe connected to the heat storage / cold area of ​​the heat storage / cold water tank by the third first electromagnetic connection end and the branch pipe connected to the domestic hot water area of ​​the heat storage / cold water tank are respectively provided with a first electromagnetic valve and a third electromagnetic valve;

[0020] The second electromagnetic three-way valve includes three second electromagnetic connection ends, the first second electromagnetic connection end is connected to the heat storage / cold area of ​​the heat storage / cold water tank, the second second electromagnetic connection end is connected to the input port of the air source heat pump unit, and the third second electromagnetic connection end is respectively connected to the heating machine input port of the heating unit, the heat storage / cold area of ​​the heat storage / cold water tank, and the coil of the domestic hot water area of ​​the heat storage / cold water tank through three parallel branch pipes;

[0021] The branch pipe connecting the third first electromagnetic connection end and the heat storage / cold area of ​​the heat storage / cold water tank is provided with a second electromagnetic valve.

[0022] Preferably, the heat storage / cold area of ​​the heat storage / cold water tank forms a circulation with the fan disk or floor heating as the terminal equipment through pipelines and a circulation pump.

[0023] Preferably, the domestic hot water area of ​​the heat storage / cold water tank is connected to a shower head or a hot water faucet serving as the terminal device via a hot water outlet pipe.

[0024] Beneficial effects of the utility model:

[0025] The application of the utility model can make the household heating and hot water system more stable, and will not cause damage to the unit due to repeated switching of the refrigerant and the compressor. In the cold winter, the comfort will not be affected by the performance degradation of the heat pump unit. The switching of dual heat sources is also more economical.

[0026] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural schematic diagram of an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0028] Example

[0029] like Figure 1 As shown, the multi-energy complementary system for household heating and hot water includes an air source heat pump unit 1, a heating unit 2, a heat storage / cold water tank 3 and an intelligent thermostat 4.

[0030] Among them, the heating unit 2 is used to provide domestic hot water and heating;

[0031] The air source heat pump unit 1 performs cooling or heating;

[0032] The intelligent thermostat 4 controls the start and stop of the terminal device 5, valves, air source heat pump unit 1 and heating unit 2 through preset logic;

[0033] The heat storage / cold water tank 3 stores heat energy and domestic water;

[0034] In summer, the air source heat pump unit 1 or the heating unit 2 provides domestic hot water, while the air source heat pump unit 1 performs cooling;

[0035] In winter, the air source heat pump unit 1 heats and provides domestic hot water. When the heating capacity of the air source heat pump unit is insufficient, the intelligent thermostat 4 controls the air source heat pump unit 1 and the heating unit 2 to heat together, or controls only the heating unit 2 to heat, so as to provide sufficient domestic hot water.

[0036] The principle of the utility model to achieve the technical effect is briefly described as follows:

[0037] (1) The indoor thermostat, as the core component of the entire system, is responsible for the logical operation of the entire system. It not only controls the room temperature, but also the operation of valves and units. It communicates with the heat pump unit through the 485 protocol and controls the on and off of valves and heating units through the control line.

[0038] (2) The indoor thermostat obtains the current parameters of the heat pump unit through 485 communication with the air source heat pump unit: operating voltage, operating current, outlet water temperature, return water temperature, water flow, and pre-enters the current electricity price on the thermostat interface. The current unit heating price is calculated using a preset formula (unit: RMB / kwH). The current natural gas price is pre-entered on the thermostat interface to calculate the current unit heating price (unit: RMB / kwH).

[0039] The price of electricity alone and the price of natural gas alone for the current load are calculated and compared in real time. When it is calculated that the price of natural gas is cheaper than the price of electricity, the thermostat starts the heating unit through the control line to provide heat source for the terminal.

[0040] (3) The indoor thermostat communicates with the air source heat pump unit through 485 to obtain the current parameters of the heat pump unit: return water temperature. When the return water temperature does not reach the set value for a long time, it is considered that the heating capacity of the air source heat pump unit cannot meet the current load requirements. The thermostat starts the heating unit through the control line to provide heat source for the terminal.

[0041] (4) The indoor thermostat communicates with the air source heat pump unit through 485 to obtain the current parameters of the heat pump unit: unit fault signal, and the thermostat starts the heating unit through the control line to provide heat source for the terminal.

[0042] (5) Thermostat through the control line

[0043] Electric three-way valve 1 control: In the initial stage, 1 / 2 / 3 are all connected. When receiving the signal from the thermostat, it will switch to the 1 / 2 side or the 1 / 3 side.

[0044] Electric three-way valve 2 control: In the initial stage, 1 / 2 / 3 are all connected. When receiving the signal from the thermostat, it will switch to the 1 / 2 side or the 2 / 3 side.

[0045] (6) Solenoid valve control, the thermostat controls the following via the control line: in cooling mode, solenoid valve 1 and solenoid valve 2 are closed; in heating mode, solenoid valve 1 and solenoid valve 2 are open; when the domestic hot water reaches the set temperature, solenoid valve 3 is closed.

[0046] (7) Domestic hot water: Pre-determine the mode and load of the air source heat pump unit, whether it is cooling in summer or heating in winter, and whether the status of the heat pump unit meets the current load, and use logical judgment to determine the optimal hot water heating method.

[0047] In some embodiments, the air source heat pump unit 1 provides cooling or heating through the air disk 51 and provides heating through the floor heating 52 .

[0048] In some embodiments, the terminal device 5 is a fan coil 51 , a floor heating 52 , a hot water faucet 53 or a shower head 54 .

[0049] In some embodiments, the heating unit 2 is a gas unit, which provides heating through the fan disk 51 and provides heating through the floor heating 52; the domestic hot water area 31 of the heat storage / cold water tank 3 is provided with a coil 311 and a water inlet 312, and water is replenished through the water inlet 312.

[0050] In some embodiments, the output port of the air source heat pump unit 1 is provided with a first electromagnetic three-way valve 6, and the input port is provided with a second electromagnetic three-way valve 7;

[0051] The first electromagnetic three-way valve 6 includes three first electromagnetic connection ends, the first first electromagnetic connection end 61 is connected to the output port of the air source heat pump unit 1, the second first electromagnetic connection end 62 is connected to the heat storage / cold area 32 of the heat storage / cold water tank 3, and the third first electromagnetic connection end 63 is respectively connected to the heat supply machine output port 21 of the heating unit 2, the heat storage / cold area 32 of the heat storage / cold water tank 3, and the coil 311 of the domestic hot water area 31 of the heat storage / cold water tank 3 through three parallel branch pipes;

[0052] The branch pipe connected to the heat storage / cold area 32 of the heat storage / cold water tank 3 and the branch pipe connected to the domestic hot water area 31 of the heat storage / cold water tank 3 are respectively provided with a first solenoid valve 41 and a third solenoid valve 43;

[0053] The second electromagnetic three-way valve 7 includes three second electromagnetic connection ends, the first second electromagnetic connection end 71 is connected to the heat storage / cold area 32 of the heat storage / cold water tank 3, the second second electromagnetic connection end 72 is connected to the input port of the air source heat pump unit 1, and the third second electromagnetic connection end 73 is respectively connected to the heating machine input port 22 of the heating unit 2, the heat storage / cold area 32 of the heat storage / cold water tank 3, and the coil 311 of the domestic hot water area 31 of the heat storage / cold water tank 3 through three parallel branch pipes;

[0054] The branch pipe connecting the third first electromagnetic connection end 63 and the heat storage / cold area 32 of the heat storage / cold water tank 3 is provided with a second electromagnetic valve 42 .

[0055] In some embodiments, the heat storage / cold area 32 of the heat storage / cold water tank 3 forms a circulation with the fan 51 or the floor heating 52 as the terminal device 5 through pipelines and a circulation pump 34.

[0056] In some embodiments, the domestic hot water area 31 of the heat storage / cold water tank 3 is connected to a shower head 54 or a hot water faucet 53 as a terminal device 5 through a hot water outlet pipe 35 .

[0057] The utility model also provides a method for using a multi-energy complementary system for household heating and hot water. The steps for using the system for cooling in summer are as follows:

[0058] Step A1, closing the first solenoid valve 41 and the second solenoid valve 42;

[0059] Step A2, detecting the temperature demand of the room through the intelligent thermostat 4, controlling the first first electromagnetic connection end 61 of the first electromagnetic three-way valve 6 to be connected with the second first electromagnetic connection end 62, controlling the first second electromagnetic connection end 71 of the second electromagnetic three-way valve 7 to be connected with the second second electromagnetic connection end 72, starting the air source heat pump unit 1 to provide cold water for the heat storage / cold water tank 3, cooling the air disk 51 through the circulation pump 34, and shutting down the air source heat pump unit 1 after reaching the set temperature;

[0060] Step A3: After releasing domestic hot water, if the intelligent thermostat 4 detects that the temperature of the domestic hot water area 31 of the heat storage / cold water tank 3 is lower than the set value,

[0061] Then, when the air source heat pump unit 1 is in the cooling standby state, the first first electromagnetic connection end 61 of the first electromagnetic three-way valve 6 is controlled to be connected with the third first electromagnetic connection end 63, and the third second electromagnetic connection end 73 of the second electromagnetic three-way valve 7 is controlled to be connected with the second second electromagnetic connection end 72, and the air source heat pump unit 1 is turned on to heat the domestic hot water area 31 to the set temperature; then the third electromagnetic valve 43 is closed to switch the air source heat pump unit 1 back to the cooling mode, and then the first first electromagnetic connection end 61 of the first electromagnetic three-way valve 6 is controlled to be connected with the second first electromagnetic connection end 62;

[0062] When the air source heat pump unit 1 is in cooling operation, the heating unit 2 is started to heat the domestic hot water area 31 ; when the water temperature reaches the set value, the intelligent room thermostat gives an instruction to shut down the heating unit 2 and close the third solenoid valve 43 .

[0063] The utility model also provides a method for using a multi-energy complementary system for household heating and hot water. The steps for using the system for winter cooling are as follows:

[0064] Step B1, opening the first solenoid valve 41 and the second solenoid valve 42;

[0065] Step B2: If the air source heat pump unit 1 can meet the needs of all terminal devices 5, then execute steps B2.1 to B2.3; if it cannot meet the needs of all terminal devices 5, then execute steps B2.4 to B2.6;

[0066] Step B2.1: When the domestic hot water area 31 of the heat storage / cold water tank 3 has not reached the set temperature and the room temperature still has a demand,

[0067] The three first electromagnetic connection ends of the first electromagnetic three-way valve 6 are all connected, and the three third electromagnetic connection ends of the second electromagnetic three-way valve 7 are all connected, and the air source heat pump unit 1 heats the domestic hot water area 31 and the heat storage / cold area 32 of the heat storage / cold water tank 3 at the same time;

[0068] Step B2.2: When the domestic hot water area 31 reaches the set temperature and the room temperature still has a demand,

[0069] Control the first electromagnetic connection end 61 of the first electromagnetic three-way valve 6 to be connected with the second first electromagnetic connection end 62, control the first second electromagnetic connection end 71 of the second electromagnetic three-way valve 7 to be connected with the second second electromagnetic connection end 72, and close the third electromagnetic valve 43 at the same time;

[0070] Step B2.3: When the domestic hot water area 31 reaches the set temperature and there is no demand for room temperature,

[0071] Control the first first electromagnetic connection end 61 of the first electromagnetic three-way valve 6 to be connected with the third first electromagnetic connection end 63, control the second second electromagnetic connection end 72 of the second electromagnetic three-way valve 7 to be connected with the third second electromagnetic connection end 73, and open the third electromagnetic valve 43 at the same time;

[0072] Step B2.4, the intelligent thermostat 4 reads the values ​​of all terminal devices 5 through the control line 485 protocol and calculates the following three conditions:

[0073] Condition 1: The price of unit heating capacity of air source heat pump unit 1 and heating unit 2, unit: yuan / kwH,

[0074] It is calculated that electricity is more expensive than natural gas.

[0075] The heating capacity of one unit of air source heat pump unit is calculated based on the ratio of electricity price to COP. The COP (heating efficiency value) is taken as the average value in each time period, which lasts for A seconds.

[0076] The unit heating capacity of heating unit 2 is calculated based on the natural gas price and the calorific value of natural gas;

[0077] Condition 2: The outlet / return water temperature of air source heat pump unit 1 is less than the set outlet / return water temperature -B° for C seconds;

[0078] Condition 3: When the air source heat pump unit 1 fails to heat;

[0079] Under condition one, condition two or condition three, the first first electromagnetic connection end 61 of the first electromagnetic three-way valve 6 is controlled to be connected with the second first electromagnetic connection end 62, the first second electromagnetic connection end 71 of the second electromagnetic three-way valve 7 is controlled to be connected with the second second electromagnetic connection end 72, and the third electromagnetic valve 43 is opened at the same time, the heating unit 2 is started to heat the domestic hot water area 31 and the heat storage / cold area 32 of the heat storage / cold water tank 3 at the same time, and the air source heat pump unit 1 is used as auxiliary heating;

[0080] Step B2.5, when the domestic hot water area 31 reaches the set temperature, the third solenoid valve 43 is closed;

[0081] Step B2.6: When the domestic hot water area 31 and all the terminal devices 5 reach the required temperature, the third solenoid valve 43 is closed and the heating unit 2 and the air source heat pump are both on standby.

[0082] In some embodiments, the real-time COP of the air source heat pump unit 1 is obtained by comprehensive calculation of the inlet and return water temperature difference, system flow, power, etc. of the unit.

[0083] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A multi-energy complementary system for household heating and hot water; characterized by: It comprises an air source heat pump unit (1), a heating unit (2), a heat storage / cold water tank (3) and an intelligent temperature controller (4); The heating unit (2) is used to provide domestic hot water and heat; The air source heat pump unit (1) performs cooling or heating; The intelligent temperature controller (4) controls the start and stop of the terminal device (5), valves, the air source heat pump unit (1), and the heating unit (2) through preset logic; The heat storage / cold water tank (3) stores heat energy and domestic water; In summer, the air source heat pump unit (1) or the heating unit (2) provides domestic hot water, while the air source heat pump unit (1) performs cooling; In winter, the air source heat pump unit (1) performs heating and provides the domestic hot water, and when the heating capacity of the air source heat pump unit (1) is insufficient, the intelligent thermostat (4) controls the air source heat pump unit (1) and the heating unit (2) to heat together, or controls only the heating unit (2) to heat, so as to provide sufficient domestic hot water.

2. The multi-energy complementary system for domestic heating and hot water according to claim 1 is characterized in that: The air source heat pump unit (1) provides cooling or heating through the air disk (51) and provides heating through the floor heating (52).

3. The multi-energy complementary system for domestic heating and hot water according to claim 1, characterized in that: The terminal device (5) is a fan disk (51), a floor heating (52), a hot water tap (53) or a shower (54).

4. The multi-energy complementary system for domestic heating and hot water according to claim 1, characterized in that: The heating unit (2) is a gas unit, which provides heating through a fan disk (51) and provides heating through floor heating (52); the domestic hot water area (31) of the heat storage / cold water tank (3) is provided with a coil (311) and a water inlet (312), and water is replenished through the water inlet (312).

5. The multi-energy complementary system for domestic heating and hot water according to claim 1, characterized in that: The output port of the air source heat pump unit (1) is provided with a first electromagnetic three-way valve (6), and the input port is provided with a second electromagnetic three-way valve (7); The first electromagnetic three-way valve (6) comprises three first electromagnetic connection ends, the first first electromagnetic connection end (61) being connected to the output port of the air source heat pump unit (1), the second first electromagnetic connection end (62) being connected to the heat storage / cold area (32) of the heat storage / cold water tank (3), and the third first electromagnetic connection end (63) being connected to the heat supply machine output port (21) of the heating unit (2), the heat storage / cold area (32) of the heat storage / cold water tank (3), and the coil (311) of the domestic hot water area (31) of the heat storage / cold water tank (3) through three parallel branch pipes; The branch pipe connected to the heat storage / cold area (32) of the heat storage / cold water tank (3) and the branch pipe connected to the domestic hot water area (31) of the heat storage / cold water tank (3) are respectively provided with a first solenoid valve (41) and a third solenoid valve (43); The second electromagnetic three-way valve (7) comprises three second electromagnetic connection ends, the first second electromagnetic connection end (71) being connected to the heat storage / cold area (32) of the heat storage / cold water tank (3), the second second electromagnetic connection end (72) being connected to the input port of the air source heat pump unit (1), and the third second electromagnetic connection end (73) being connected to the heat supply machine input port (22) of the heating unit (2), the heat storage / cold area (32) of the heat storage / cold water tank (3), and the coil (311) of the domestic hot water area (31) of the heat storage / cold water tank (3) through three parallel branch pipes; A second electromagnetic valve (42) is provided in a branch pipe connecting the third first electromagnetic connection end (63) and the heat storage / cold area (32) of the heat storage / cold water tank (3).

6. The multi-energy complementary system for domestic heating and hot water according to claim 1, characterized in that: The heat storage / cold area (32) of the heat storage / cold water tank (3) forms a circulation with the fan disk (51) or floor heating (52) as the terminal device (5) through pipelines and a circulation pump (34).

7. The multi-energy complementary system for domestic heating and hot water according to claim 1, characterized in that: The domestic hot water area (31) of the heat storage / cold water tank (3) is connected to a shower head (54) or a hot water tap (53) as the terminal device (5) via a hot water outlet pipe (35).

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