Air source heat pump unit with peak-valley electricity control strategy

Abstract

The utility model relates to an air source heat pump unit with a peak-valley electricity control strategy. The air source heat pump unit comprises a four-way valve, a compressor assembly, an evaporator, a heat exchanger, an energy storage water tank, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a sixth electromagnetic valve, a port a, a port b, a port c and a port d are formed in the four-way valve, an inlet of the compressor assembly is communicated with the port b of the four-way valve, an outlet of the compressor assembly is communicated with the port d of the four-way valve, and an outlet of the evaporator is communicated with the port c of the four-way valve. The method has the advantages that the air source heat pump unit with the peak-valley electricity control strategy can make proper operation logic according to the peak-valley electricity price of the state grid, the heat storage property of the air source heat pump is utilized to the maximum extent, valley electricity is utilized to the maximum extent for heating, and the purposes of reducing the operation cost, balancing the load of the grid and reducing carbon emission are achieved while the heat utilization requirements of customers are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to an air source heat pump unit with peak-valley electricity control strategy. BACKGROUND

[0002] At present, air source heat pump water heaters or heating units or pool heat pumps all belong to heat production and storage equipment, but all cannot effectively combine the peak-valley electricity of State Grid to make energy storage control, and cannot achieve the purpose of energy saving and cost saving; how to make the air source heat pump make appropriate control strategy according to the peak-valley electricity of State Grid, so that the air source heat pump operation reduces operation cost, becomes the difficult problem of the industry. SUMMARY

[0003] The utility model discloses a kind of air source heat pump units with peak-valley electricity control strategy, air source heat pump unit with peak-valley electricity control strategy can make appropriate operation logic according to the peak-valley electricity of State Grid, maximize the use of air source heat pump heat storage property, maximize the use of valley electricity to heat, satisfy customer heat demand while reaching the purpose of operation cost reduction, power grid load balance, reduce carbon emissions.

[0004] In order to achieve the above purpose, the first technical scheme of the utility model is realized as follows: it is an air source heat pump unit with peak-valley electricity control strategy, characterized by comprising:

[0005] Four-way valve;A, b, c and d are provided at the four-way valve, the a port is communicated with the d port, and the b port is communicated with the c port;

[0006] Compressor assembly and evaporator;The inlet of the compressor assembly is communicated with the b port of the four-way valve, and the outlet of the compressor assembly is communicated with the d port of the four-way valve, and the outlet of the evaporator is communicated with the c port of the four-way valve;

[0007] Heat exchanger and energy storage water tank;Heat exchange pipe is provided in the heat exchanger, and energy storage pipe is provided in the energy storage water tank, and the outlet of the heat exchange pipe and the outlet of the energy storage pipe are respectively communicated with the inlet of the evaporator;

[0008] First solenoid valve and second solenoid valve;The a port of the four-way valve is communicated with the inlet of the heat exchange pipe through the first solenoid valve, and the a port of the four-way valve is communicated with the inlet of the energy storage pipe through the second solenoid valve;And

[0009] Third solenoid valve, fourth solenoid valve, fifth solenoid valve and sixth solenoid valve;The water outlet of the energy storage water tank is communicated with the unit water outlet through the third solenoid valve, the water outlet of the heat exchanger is communicated with the unit water outlet through the fourth solenoid valve, the water inlet of the energy storage water tank is communicated with the unit backwater outlet through the fifth solenoid valve, and the water inlet of the heat exchanger is communicated with the unit backwater outlet through the sixth solenoid valve.

[0010] In this technical solution, the compressor assembly includes a compressor and a gas-liquid separator; the inlet of the gas-liquid separator is connected to port b of the four-way valve, the outlet of the gas-liquid separator is connected to the inlet of the compressor, and the outlet of the compressor is connected to port d of the four-way valve.

[0011] This technical solution also includes a dryer and an electronic expansion valve; the inlet of the dryer is connected to the outlet of the heat exchange tube and the outlet of the energy storage tube respectively, and the outlet of the dryer is connected to the inlet of the evaporator through the electronic expansion valve.

[0012] The advantages of this utility model compared with the prior art are as follows: the air source heat pump unit with peak and valley electricity control strategy can make appropriate operating logic according to the peak and valley electricity price of the State Grid, maximize the use of the heat storage properties of the air source heat pump, maximize the use of valley electricity for heating, meet the heating needs of customers, and achieve the goals of reducing operating costs, balancing grid load, and reducing carbon emissions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the refrigerant and water flow path of this utility model. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0015] like Figure 1 As shown, it is an air source heat pump unit with peak-valley electricity control strategy, including:

[0016] Four-way valve 1; the four-way valve 1 is provided with port a, port b, port c and port d, port a and port d are connected, and port b and port c are connected; compressor assembly and evaporator 4; the inlet of the compressor assembly is connected to port b of the four-way valve 1, the outlet of the compressor assembly is connected to port d of the four-way valve 1, and the outlet of the evaporator 4 is connected to port c of the four-way valve 1.

[0017] Heat exchanger 7 and energy storage tank 11; heat exchange tube 71 is provided in heat exchanger 7, and energy storage tube 111 is provided in energy storage tank 11. The outlet of heat exchange tube 71 and the outlet of energy storage tube 111 are respectively connected to the inlet of evaporator 4.

[0018] First solenoid valve 13 and second solenoid valve 14; port a of the four-way valve 1 is connected to the inlet of heat exchange tube 71 through the first solenoid valve 13, and port a of the four-way valve 1 is connected to the inlet of energy storage tube 111 through the second solenoid valve 14; and

[0019] Third electromagnetic valve 12, fourth electromagnetic valve 10, fifth electromagnetic valve 9 and sixth electromagnetic valve 8; the water outlet of the energy storage water tank 11 is communicated with the unit water outlet through the third electromagnetic valve 12, the water outlet of the heat exchanger 7 is communicated with the unit water outlet through the fourth electromagnetic valve 10, the water inlet of the energy storage water tank 11 is communicated with the unit return water outlet through the fifth electromagnetic valve 9, and the water inlet of the heat exchanger 7 is communicated with the unit return water outlet through the sixth electromagnetic valve 8. The unit return water outlet refers to the water of the user terminal device entering the heat pump unit; the unit water outlet refers to the water coming from the return water outlet passing through the unit heat exchanger or the heat storage water tank and then coming out to the user terminal device; the terminal device can refer to heating fins, can refer to floor heating coils, etc.; the other end of the return water outlet is one port of the user's terminal heat exchange device, and the water outlet also refers to the other port of the heat exchanger connected to the user's terminal heat exchange device; the heat exchange device is one in and one out, forming a closed loop form to allow the water or carrier to release heat, and the unit return water outlet and the unit water outlet belong to two interfaces of the unit itself, one in and one out, so that the heat of the unit can be released to the user's terminal device.

[0020] When the electricity price is in the valley / flat period, and the unit has no heat load demand, the unit performs valley electricity energy recovery operation, and the control method comprises:

[0021] ①The first electromagnetic valve 13 is closed, and the second electromagnetic valve 14 is opened, so that the refrigerant passes through the compressor assembly, the four-way valve 1d port, the four-way valve 1a port, the second electromagnetic valve 14, the energy storage pipe 111, the evaporator 9, the four-way valve 1c port, the four-way valve 1b port and then returns to the compressor assembly;

[0022] ②The energy storage water tank 11 is set to a temperature T1*coefficient A, the A coefficient is greater than 1, but the maximum value of the A coefficient is not higher than the running range of the air source heat pump unit itself;

[0023] ③The running frequency P1 of the compressor assembly is according to the default running of the unit, and the P1*coefficient B; the B coefficient is greater than 1, but the maximum value of the B coefficient is not higher than the running range of the air source heat pump unit itself;

[0024] ④The running frequency P2 of the evaporator system fan is according to the default running of the unit: the P2*coefficient C; the C coefficient is greater than 1, but the maximum value of the C coefficient is not higher than the running range of the air source heat pump unit itself;

[0025] ⑤The third electromagnetic valve 12 and the fifth electromagnetic valve 9 are opened, and the fourth electromagnetic valve 10 and the sixth electromagnetic valve 8 are closed;

[0026] When the electricity price is in the valley / flat period, and the client has heat load demand, the unit performs heating operation, and the control method comprises:

[0027] ① the first electromagnetic valve 13 is opened, the second electromagnetic valve 14 is closed, the refrigerant passes through the compressor assembly, the four-way valve 1d port, the four-way valve 1a port, the first electromagnetic valve 13, the heat exchange pipe 71, the evaporator 9, the four-way valve 1c port, the four-way valve 1b port and then returns to the compressor assembly;

[0028] ② the energy storage water tank sets the temperature T1* coefficient A, the A coefficient is greater than 1, but the maximum value of the A coefficient is not higher than the running range of the air source heat pump unit itself;

[0029] ③ the compressor assembly running frequency P1, according to the default operation of the unit, P1* coefficient B; the B coefficient is greater than 1, but the maximum value of the B coefficient is not higher than the running range of the air source heat pump unit itself;

[0030] ④ the evaporator system fan running frequency P2: according to the default operation of the unit: P2* coefficient C; the C coefficient is greater than 1, but the maximum value of the C coefficient is not higher than the running range of the air source heat pump unit itself;

[0031] ⑤ the third electromagnetic valve 12 and the fifth electromagnetic valve 9 are closed, and the fourth electromagnetic valve 10 and the sixth electromagnetic valve 8 are opened;

[0032] When the electricity price is in the peak / peak period, and there is no heat load demand of the client, the unit does not carry out valley electricity energy recovery operation, and the unit is in standby state;

[0033] When the electricity price is in the peak / peak period, and there is heat load demand of the client, the unit carries out heating operation, and the control method comprises:

[0034] ① the first electromagnetic valve 13 is opened, the second electromagnetic valve 14 is opened, the refrigerant passes through the compressor assembly, the four-way valve 1d port and the four-way valve 1a port, and then enters the heat exchange pipe 71 through the first electromagnetic valve 13 and enters the energy storage pipe 111 through the second electromagnetic valve 14, and the refrigerant passing through the heat exchange pipe 71 and the energy storage pipe 111 then passes through the evaporator 9, the four-way valve 1c port and the four-way valve 1b port and then returns to the compressor assembly;

[0035] ② the energy storage water tank sets the temperature T1* coefficient A, the A coefficient is greater than 1, but the maximum value of the A coefficient is not higher than the running range of the air source heat pump unit itself;

[0036] ③ the compressor assembly running frequency P1, according to the default operation of the unit, P1* coefficient B; the B coefficient is greater than 1, but the maximum value of the B coefficient is not higher than the running range of the air source heat pump unit itself;

[0037] ④ the evaporator system fan running frequency P2: according to the default operation of the unit: P2* coefficient C; the C coefficient is greater than 1, but the maximum value of the C coefficient is not higher than the running range of the air source heat pump unit itself;

[0038] The third electromagnetic valve 12 and the fifth electromagnetic valve 9 are opened, and the fourth electromagnetic valve 10 and the sixth electromagnetic valve 8 are opened.

[0039] When the temperature T1 of the energy storage water tank 11 is greater than or equal to the set temperature T2 of the air source heat pump unit, the air source heat pump unit is not running, and the third electromagnetic valve 12 and the fifth electromagnetic valve 9, the fourth electromagnetic valve 10 and the sixth electromagnetic valve 8 are closed until the temperature T1 is less than the set temperature T2.

[0040] When the temperature T1 of the energy storage water tank 11 is less than the set temperature T2 of the air source heat pump unit, the air source heat pump unit is running, and the control method comprises the following steps:

[0041] The first electromagnetic valve 13 is opened, and the second electromagnetic valve 14 is closed, and the refrigerant passes through the compressor assembly, the four-way valve 1d port, the four-way valve 1a port, the first electromagnetic valve 13, the heat exchange pipe 71, the evaporator 9, the four-way valve 1c port, the four-way valve 1b port and then returns to the compressor assembly.

[0042] The set temperature T1 of the energy storage water tank is multiplied by a coefficient D, and the D coefficient is less than 1, but the minimum value of the D coefficient is not less than the running range of the air source heat pump unit itself.

[0043] The running frequency P1 of the compressor is according to the default running of the air source heat pump unit, and the P1 is multiplied by a coefficient E, and the E coefficient is less than 1, but the minimum value of the E coefficient is not less than the running range of the air source heat pump unit itself.

[0044] The running frequency P2 of the evaporator system fan is according to the default running of the air source heat pump unit, and the P2 is multiplied by a coefficient F, and the F coefficient is less than 1, but the minimum value of the F coefficient is not less than the running range of the air source heat pump unit itself.

[0045] The third electromagnetic valve 12 and the fifth electromagnetic valve 9 are closed, and the fourth electromagnetic valve 10 and the sixth electromagnetic valve 8 are opened.

[0046] In the embodiment, the compressor assembly comprises a compressor 3 and a gas-liquid separator 2; the inlet of the gas-liquid separator 2 is communicated with the b port of the four-way valve 1, the outlet of the gas-liquid separator 2 is communicated with the inlet of the compressor 3, and the outlet of the compressor 3 is communicated with the d port of the four-way valve 1.

[0047] In the embodiment, a dryer 6 and an electronic expansion valve 5 are further included; the inlets of the dryer 6 are respectively communicated with the outlets of the heat exchange pipe 71 and the energy storage pipe 111, and the outlet of the dryer 6 is communicated with the inlet of the evaporator 9 through the electronic expansion valve 5.

[0048] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the described embodiments. For ordinary skilled persons in the art, various changes, modifications, replacements and deformations of the embodiments without departing from the principles and purposes of the utility model still fall within the protection scope of the utility model.

Claims

1. An air source heat pump unit with peak-valley power control strategy, characterized in that It comprises: A four-way valve (1) is provided with a port a, a port b, a port c and a port d, the port a and the port d are communicated, the port b and the port c are communicated; A compressor assembly and an evaporator (4), the inlet of the compressor assembly is communicated with the port b of the four-way valve (1), the outlet of the compressor assembly is communicated with the port d of the four-way valve (1), the outlet of the evaporator (4) is communicated with the port c of the four-way valve (1); A heat exchanger (7) and an energy storage water tank (11), the heat exchanger (7) is provided with a heat exchange pipe (71), the energy storage water tank (11) is provided with an energy storage pipe (111), the outlet of the heat exchange pipe (71) and the outlet of the energy storage pipe (111) are respectively communicated with the inlet of the evaporator (4); A first electromagnetic valve (13) and a second electromagnetic valve (14), the port a of the four-way valve (1) is communicated with the inlet of the heat exchange pipe (71) through the first electromagnetic valve (13), the port a of the four-way valve (1) is communicated with the inlet of the energy storage pipe (111) through the second electromagnetic valve (14); and A third electromagnetic valve (12), a fourth electromagnetic valve (10), a fifth electromagnetic valve (9) and a sixth electromagnetic valve (8), the water outlet of the energy storage water tank (11) is communicated with the water outlet of the unit through the third electromagnetic valve (12), the water outlet of the heat exchanger (7) is communicated with the water outlet of the unit through the fourth electromagnetic valve (10), the water inlet of the energy storage water tank (11) is communicated with the water return inlet of the unit through the fifth electromagnetic valve (9), the water inlet of the heat exchanger (7) is communicated with the water return inlet of the unit through the sixth electromagnetic valve (8).

2. The air source heat pump unit with peak-valley power control strategy according to claim 1, characterized in that The compressor assembly comprises a compressor (3) and a gas-liquid separator (2), the inlet of the gas-liquid separator (2) is communicated with the port b of the four-way valve (1), the outlet of the gas-liquid separator (2) is communicated with the inlet of the compressor (3), the outlet of the compressor (3) is communicated with the port d of the four-way valve (1).

3. The air source heat pump unit with peak-valley power control strategy according to claim 1, characterized in that It also comprises a dryer (6) and an electronic expansion valve (5), the inlet of the dryer (6) is respectively communicated with the outlet of the heat exchange pipe (71) and the outlet of the energy storage pipe (111), the outlet of the dryer (6) is communicated with the inlet of the evaporator (4) through the electronic expansion valve (5).

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