Photovoltaic direct-driven direct-current frequency conversion module pressure-bearing hot water system

Abstract

The utility model discloses a photovoltaic direct-drive direct-current frequency conversion module pressure-bearing hot water system, which belongs to the technical field of hot water systems and comprises a photovoltaic direct-drive direct-current frequency conversion air energy heat pump host, a heating water tank, a heat storage water tank, a unit pump, an electric two-way valve, an internal circulating pump, a water return pump and a solar photovoltaic module. Solar photovoltaic electricity is directly utilized to directly drive the heat pump unit, and the heating mode and the hot water supply mode of the system are changed. The utility model discloses an efficient and energy-saving photovoltaic direct-driven direct-current variable-frequency air energy heat pump unit, internal circulation between module water tanks, tail end constant temperature control and air energy heat pump unit control. The air energy heat pump unit changes the situation that an air energy heat pump unit can only be driven by a municipal power grid, free direct driving is achieved through solar photovoltaic power generation, and the utilization rate of renewable energy sources is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot water system technical field, concretely points to a kind of photovoltaic direct-drive direct current frequency conversion module pressure-bearing hot water system. BACKGROUND

[0002] With the development of economy and the improvement of people's living standards, there are still some deficiencies in further improving people's use experience, use comfort, water saving, energy saving, water quality health, and the use of renewable energy.

[0003] The existing hot water supply system is:

[0004] 1. Open system, high failure rate, high operating cost, cold and hot distribution points, unhygienic system water quality, water tank easy to leak and other problems.

[0005] 2. Large pressure system: high operating cost, easy to mix water, stagnant water area (easily produce legionella) and other problems.

[0006] 3. Heat pump unit is a fixed frequency unit, this equipment is a machine to be eliminated, and the energy efficiency ratio is very low. INVENTION CONTENTS

[0007] The utility model solves the technical problem in the background art by providing a photovoltaic direct-drive direct current frequency conversion module pressure-bearing hot water system, which effectively improves the stability, energy saving, comfort, and water quality health of the entire heating system.

[0008] The utility model solves the above technical problems by adopting the following technical solutions

[0009] A photovoltaic direct-drive direct current frequency conversion module pressure-bearing hot water system includes a photovoltaic direct-drive direct current frequency conversion air energy heat pump main unit, a heating water tank, a heat storage water tank, a unit pump, an electric two-way valve, an internal circulation pump, a return water pump, and a solar photovoltaic assembly.

[0010] The solar photovoltaic assembly is directly connected to the photovoltaic direct-drive direct current frequency conversion air energy heat pump main unit through an MC4 port.

[0011] One side of the heating water tank is connected to the photovoltaic direct-drive direct current frequency conversion air energy heat pump main unit through a hot water circulation pipe and a cold water circulation pipe. A unit pump is arranged on the cold water circulation pipe between the heating water tank and the photovoltaic direct-drive direct current frequency conversion air energy heat pump main unit. The heat storage water tank has at least three, including a first heat storage water tank, an adjacent heat storage water tank, and a terminal heat storage water tank.

[0012] The top of the first heat storage water tank is provided with a cold water inlet and a hot water outlet, and the cold water inlet of the first heat storage water tank is connected with the hot water outlet at the top of the adjacent heat storage water tank through a pipeline; the bottom of the terminal heat storage water tank is provided with an internal circulation port connected with an electric two-way valve, an internal circulation pump and a cold water inlet at the top of the heating tank through a pipeline.

[0013] As a further preferred scheme of the utility model, the bottom of the heating tank is provided with a sewage outlet, the top of the heating tank is provided with a hot water outlet and a cold water inlet, the cold water inlet of the heating tank is connected with the cold water supplement inlet of the terminal water tank through an electric two-way valve, an internal circulation pump and a cold water supplement pipe, and the hot water outlet of the heating tank (2) is connected with the hot water outlet at the upper part of the heat storage water tank through a hot water supply pipe.

[0014] As a further preferred scheme of the utility model, a flow guide pipe is arranged in the cold water inlet at the top of the heating tank and the heat storage water tank.

[0015] As a further preferred scheme of the utility model, the top of the terminal heat storage water tank is provided with a cold water inlet and a hot water outlet, the bottom is provided with an internal circulation port, a cold water supplement pipe is connected with the cold water supplement inlet at the top through a pipeline, and the hot water outlet of the terminal heat storage water tank is connected with the cold water inlet at the top of the adjacent heat storage water tank through a pipeline.

[0016] As a further preferred scheme of the utility model, the cold water inlet at the top of the terminal heat storage water tank is connected with a backwater pump through a sterilization device.

[0017] Compared with the prior art, the utility model has the following technical effects:

[0018] 1、The utility model eliminates the aftereffects of the traditional open type water supplement, heating mode and water supply mode, and essentially improves the stability, energy saving property and comfort of the whole heating system.

[0019] 2, the utility model changes the heating mode, adopts step by step layer by layer heating technology, in the traditional water circulation air energy water heater and ordinary coil air energy water heater, in the process of supplementing cold water, under the action of gravity, after mixing, the original hot water temperature drops sharply, this is called water mixing phenomenon. Water mixing is a difficult problem in the air energy heat pump industry; according to experimental results, the output rate of ordinary heat storage water tank can only reach 70%; Step by step layer by layer heating technology adopts warehouse heating, fixed point positioning setting control point, the initial water temperature of the whole system when the heat pump works is always the lowest, greatly improves the COP value of the heat pump host, heating is fast, and energy efficiency is reduced;

[0020] 3, the utility model changes the traditional open system water supply mode, realizes accurate point-to-point supply, the end uses how much water, the system supplements how much water, and the heat pump unit heats how much water, and truly realizes no energy waste;

[0021] 4, the utility model changes the health of water quality in the system, the water tank of the traditional open system is connected with the atmosphere, dust in the air can enter the water tank, thereby polluting the water quality, the system is a closed water tank, not connected with the atmosphere, and truly 0 pollution;

[0022] 5, the utility model effectively prolongs the service life of the air energy heat pump host;

[0023] 6, the utility model completely changes the comfort of the traditional open type, truly realizes constant temperature and constant pressure, and the end temperature will not be cold and hot alternately;

[0024] 7, the utility model adopts a photovoltaic direct-drive direct-current variable-frequency air source heat pump unit, solar photovoltaic power generation directly drives, removes the original need for inversion, grid connection and other links, reduces the initial installation investment cost, and further utilizes renewable energy. SHEET DESCRIPTION

[0025] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0026] Figure 1 It is a working principle diagram of a photovoltaic direct-drive direct-current variable-frequency module pressure hot water system of the utility model;

[0027] Figure 2 It is a structure diagram of a photovoltaic direct-drive direct-current variable-frequency module pressure hot water system of the utility model.

[0028] The figure marks are as follows: 1- photovoltaic direct drive direct current variable frequency air energy heat pump host; 2- heating water tank; 3- heat storage water tank, 4- unit pump; 5- electric two-way valve; 6- internal circulation pump; 7- return water pump; 8- solar photovoltaic module. DETAILED DESCRIPTION

[0029] The technical scheme of the utility model will be further described in detail below with reference to the drawings:

[0030] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] As shown in Figure 1 and Figure 2 A photovoltaic direct drive direct current variable frequency module pressure hot water system, containing photovoltaic direct drive direct current variable frequency air energy heat pump host 1, heating water tank 2, heat storage water tank 3, unit pump 4, electric two-way valve 5, internal circulation pump 6, return water pump 7, solar photovoltaic module 8;

[0032] Among them, the solar photovoltaic module 8 is directly connected with the photovoltaic direct drive direct current variable frequency air energy heat pump host 1 through the MC4 port;

[0033] One side of the heating water tank 2 is connected with the photovoltaic direct drive direct current variable frequency air energy heat pump host 1 through the hot water circulation pipe and the cold water circulation pipe;The cold water circulation pipe between the heating water tank 2 and the photovoltaic direct drive direct current variable frequency air energy heat pump host 1 is provided with the unit pump 4;The number of the heat storage water tank 3 is at least three, including the first heat storage water tank, the adjacent heat storage water tank and the terminal heat storage water tank;

[0034] The first heat storage water tank is provided with the cold water inlet on the top, and the hot water outlet, the cold water inlet of the first heat storage water tank is connected with the hot water outlet on the top of the adjacent heat storage water tank through the pipeline;The bottom of the terminal heat storage water tank is provided with the internal circulation port, which is connected with the electric two-way valve 5, the internal circulation pump 6 and the cold water inlet on the top of the heating water tank 2 through the pipeline.

[0035] The bottom of the heating water tank 2 is provided with the blowdown port, the top of the heating water tank 2 is provided with the hot water outlet and the cold water inlet, the cold water inlet of the heating water tank 2 is connected with the cold water make-up port of the terminal water tank through the electric two-way valve 5, the internal circulation pump 6 and the inverted water pipe, and the hot water outlet of the heating water tank 2 is connected with the hot water outlet on the upper portion of the heat storage water tank 3 through the hot water supply pipe.

[0036] The cold water inlet at the top of the heating water tank 2 and the heat storage water tank 3 is provided with a flow guide pipe.

[0037] The top of the terminal heat storage water tank is provided with a cold water inlet, a hot water outlet, and the bottom is provided with an internal circulation port.

[0038] The cold water inlet at the top of the terminal heat storage water tank is connected to the backwater pump 7 through sterilization equipment.

[0039] The utility model discloses a smart energy management system, preferentially uses the electricity of solar photovoltaic, and in the case that photovoltaic electricity is insufficient, municipal power grid compensates seamlessly, cancels the traditional need inverter, grid-connected etc.

[0040] After the whole system is installed and all water tanks are filled with cold water, the frequency conversion heat pump unit first heats the heating water tank, and when the cold water in the heating water tank is heated to the set temperature requirement, the internal circulation pump and the electric two-way valve start working to pump the cold water in the last water tank of the system into the heating water tank, so that the hot water heated to the temperature requirement is squeezed into the heat storage water tank connected thereto.

[0041] When the water tank in the indoor backwater pipeline is lower than the set value, the backwater pump starts working to pump the low-temperature water in the pipeline network into the water tank for heating.

[0042] The utility model wants to solve the technical problem of directly utilizing solar photovoltaic electricity to directly drive the heat pump unit, changing the heating mode and hot water supply mode of the system.

[0043] In order to solve the above technical problem, the utility model provides a photovoltaic direct drive direct current frequency conversion air energy module pressure-bearing hot water system, which comprises: a high-efficiency energy-saving photovoltaic direct drive direct current frequency conversion air energy heat pump unit, internal circulation between module water tanks, terminal constant temperature control and air energy heat pump unit control.

[0044] The utility model changes the air energy heat pump unit which can only be driven by the municipal power grid, adopts solar photovoltaic power generation to directly drive for free, and improves the utilization rate of renewable energy.

[0045] The steps are as follows:

[0046] 1. Heat pump heating control description: the operation of the heat pump unit is controlled according to the temperature sensor, when the heating water tank temperature T2 is lower than 45℃ (adjustable), the heat pump unit and the unit pump start; when the heating water tank T2 reaches the set temperature 55℃ (adjustable), the heat pump unit and the unit pump stop running and enter standby state. When the solar photovoltaic direct-drive heat pump unit is working, the direct current generated by the solar photovoltaic assembly is used preferentially, and the municipal power grid is compensated in time and seamlessly when it is insufficient to drive the unit.

[0047] 2. System internal circulation control: when the heating water tank temperature T1 reaches the set temperature 52℃ (adjustable) and the water supply tank T3 temperature is ≤50℃ (adjustable), the system internal circulation pump and the electric two-way valve start working, otherwise, stop working.

[0048] 3. Auxiliary electric heating control description: when the environment temperature T6 (built-in unit) is lower than the set auxiliary start environment temperature 10℃ (adjustable) and the heating water tank temperature T2 is lower than 42℃, the auxiliary electric heating is automatically started; when the environment temperature T6 is higher than the set auxiliary start environment temperature 10℃ (adjustable) and T3 temperature is greater than 40℃, the auxiliary electric heating stops running and enters standby state, if the heat pump unit system fails, the auxiliary heat source automatically switches to the required working state according to the current system water temperature, ensures normal water supply of the system, and outputs fault prompt at the same time.

[0049] 4. Hot water return control description: there are two operation modes for hot water return: timing return mode and all-day return mode.

[0050] All-day return mode: when the system return water temperature T4 is ≤46℃ (adjustable), the return water circulation pump starts; when the system return water temperature T4 is ≥55℃ (adjustable), the return water circulation pump stops running.

[0051] Timing return mode: the early (05:00-09:00, adjustable), middle (11:00-13:00, adjustable) and late (17:00-20:00, adjustable) time periods can be set to control the return water, when the system return water temperature is lower than the set temperature requirement in the three time periods, the return water pump starts the return water function.

[0052]

[0053]

[0054]

[0055] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; the utility model is not limited to the above embodiments; the utility model can be modified and improved in many ways within the scope of the claims.

[0056] ​​​The pipe is described in detail with reference to the foregoing embodiments, and those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A photovoltaic direct drive direct current variable frequency module pressure hot water system, characterized in that: The application relates to a photovoltaic direct-drive direct-current variable-frequency air energy heat pump host (1), a heating water tank (2), a heat storage water tank (3), a unit pump (4), an electric two-way valve (5), an internal circulation pump (6), a backwater pump (7) and a solar photovoltaic assembly (8). The solar photovoltaic assembly (8) is directly connected with the photovoltaic direct-drive direct-current variable-frequency air energy heat pump host (1) through an MC4 port. One side of the heating water tank (2) is connected with the photovoltaic direct-drive direct-current variable-frequency air energy heat pump host (1) through a hot water circulation pipe and a cold water circulation pipe; the cold water circulation pipe between the heating water tank (2) and the photovoltaic direct-drive direct-current variable-frequency air energy heat pump host (1) is provided with the unit pump (4); the heat storage water tank (3) is at least three in number and comprises a first heat storage water tank, an adjacent heat storage water tank and a terminal heat storage water tank. The top of the first heat storage water tank is provided with a cold water inlet and a hot water outlet; the cold water inlet of the first heat storage water tank is connected with the hot water outlet at the top of the adjacent heat storage water tank through a pipeline; the bottom of the terminal heat storage water tank is provided with an internal circulation port which is connected with the electric two-way valve (5), the internal circulation pump (6) and the cold water inlet at the top of the heating water tank (2) through pipelines.

2. The photovoltaic direct-drive DC variable frequency module pressure hot water system according to claim 1, characterized in that: The bottom of the heating water tank (2) is provided with a blowdown port; the top of the heating water tank (2) is provided with a hot water outlet and a cold water inlet; the cold water inlet of the heating water tank (2) is connected with the cold water supplement inlet of the terminal water tank through the electric two-way valve (5), the internal circulation pump (6) and a backwater pipe; the hot water outlet of the heating water tank (2) is connected with the hot water outlet at the upper portion of the heat storage water tank (3) through a hot water supply pipe.

3. The photovoltaic direct-drive DC variable frequency module pressure hot water system according to claim 1, characterized in that: A flow guide pipe is arranged in the cold water inlet at the top of the heating water tank (2) and the heat storage water tank (3).

4. The photovoltaic direct drive direct-current variable frequency module pressure hot water system according to claim 1, characterized in that: The top of the terminal heat storage water tank is provided with a cold water inlet and a hot water outlet and is provided with an internal circulation port at the bottom; a cold water supplement pipe is connected with the cold water supplement inlet at the top through a pipeline; the hot water outlet of the terminal heat storage water tank is connected with the cold water inlet at the top of the adjacent heat storage water tank through a pipeline.

5. The photovoltaic direct drive DC variable frequency module pressure hot water system according to claim 1, characterized in that: The cold water inlet at the top of the terminal heat storage water tank is connected with the backwater pump (7) through sterilization equipment.

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