High-temperature hot water supply system of solar cascade heat pump

Abstract

The utility model relates to the technical field of heat pump systems, in particular to a high-temperature hot water supply system of a solar cascade heat pump, which comprises a low-temperature hot water circulation system and a high-temperature hot water circulation system, and a fluorine machine circulation system is arranged between the low-temperature hot water circulation system and the high-temperature hot water circulation system. A low-temperature-stage condenser is coupled between the low-temperature hot water circulating system and the fluorine machine circulating system, and a high-temperature condenser is coupled between the fluorine machine circulating system and the high-temperature hot water circulating system; the low-temperature hot water circulation system comprises a low-temperature hot water loop, a solar heat collector is arranged on the low-temperature hot water loop, solar energy is effectively used as a heat source, energy consumption is reduced, environmental pollution is reduced, the energy use efficiency is improved, and the concept of sustainable development is met. And efficient storage and conversion of low-temperature hot water are achieved. The fluorine machine circulating system efficiently adjusts heat transfer between a low-temperature system and a high-temperature system, effective heat exchange is achieved, and the overall heat efficiency of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump system technical field, concretely is a kind of solar energy cascade heat pump's high temperature hot water supply system. BACKGROUND

[0002] The existing hot water system, such as electric heating, boiler heating etc., although can satisfy daily hot water demand, but there is big energy consumption, high operating cost, serious environmental pollution and other problems. Especially in the industry needing a lot of hot water, such as factory, farm, slaughterhouse etc., traditional hot water system cannot satisfy the efficient, environmental protection, low-cost hot water demand. It needs large-scale continuous stable hot water supply in production process, and traditional system often cannot efficiently satisfy these demands. Especially in peak period, traditional hot water system often faces the risk of insufficient capacity or unstable hot water supply, affects production efficiency. When the demand for hot water is large in some time period, but demand is less in other time periods. Traditional hot water system often does not fully consider this load fluctuation when designing, leading to insufficient hot water in peak period, and a large amount of energy is wasted in low period.

[0003] Traditional electric heating and boiler heating system consumes a lot of energy in the running process. Electric heating relies on power supply, especially in some areas with high electricity price, the operating cost of electric heating equipment will be particularly high. And boiler heating system usually relies on fuel, such as natural gas, coal etc., and the fluctuation of fuel cost will directly affect operating cost. The thermal efficiency of many traditional heating systems is not high, especially old equipment, the energy conversion efficiency is low, causing a lot of energy waste. At the same time, it cannot meet the increasing environmental protection and energy saving requirements. SUMMARY

[0004] In view of the deficiencies of the prior art, to solve the problems raised in the background art, the utility model provides a kind of solar energy cascade heat pump's high temperature hot water supply system, which reduces the energy consumption and operating cost of traditional hot water preparation by efficient use of solar energy, reduces environmental pollution, provides stable and efficient high-temperature hot water for various industries, and realizes low-cost hot water supply.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a kind of solar energy cascade heat pump's high temperature hot water supply system, including low temperature hot water circulation system and high temperature hot water circulation system, low temperature hot water circulation system and high temperature hot water circulation system between being equipped with fluorine machine circulation system, low temperature hot water circulation system and fluorine machine circulation system between being coupled with low temperature level condenser, fluorine machine circulation system and high temperature hot water circulation system between being coupled with high temperature condenser;

[0006] The low-temperature hot water circulation system comprises a low-temperature hot water circuit, a solar heat collector arranged on the low-temperature hot water circuit, and a heat storage water tank and a mixed water tank arranged in sequence between the water outlet of the solar heat collector and the water inlet of a low-temperature condenser.

[0007] The fluorine machine circulation system comprises a fluorine machine circulation circuit, a gas-liquid separator and a high-temperature stage compressor arranged in sequence between the outlet of the low-temperature condenser and the inlet of the high-temperature condenser, and a second filter, a liquid storage tank and an electronic expansion valve arranged in sequence between the outlet of the high-temperature condenser and the inlet of the low-temperature condenser.

[0008] The high-temperature hot water circulation system comprises a high-temperature hot water circuit, a high-temperature water tank arranged on the high-temperature hot water circuit, a high-temperature water outlet and a water supplementing port arranged on the high-temperature water tank, and an external water terminal connected to the high-temperature water outlet, and the water supplementing port of the high-temperature water tank is communicated with the heat storage water tank.

[0009] As a further scheme of the utility model, the low-temperature hot water circuit between the mixed water tank and the low-temperature condenser is sequentially provided with a first circulating pump and a second one-way valve along the water outlet direction.

[0010] As a further scheme of the utility model, the water mixing tank is connected with a soft water tank, a soft water inlet pipeline is arranged between the soft water tank and the water mixing tank, and the soft water inlet pipeline is sequentially provided with a first filter, a soft water pump, a soft water stop valve and a third check valve along the water inlet direction. The soft water tank removes the hardness components (such as calcium and magnesium ions) in water, prevents scale deposition, and improves the water quality and reduces the accumulation of scale in the pipelines and equipment in the system. The first filter preliminarily filters impurities and particulate matters in water, prevents these impurities from entering the soft water tank or the water mixing tank, further ensures the cleanliness of water quality, effectively guarantees the water flow and water pressure stability of the soft water system through the soft water pump, ensures that the water flow in the soft water tank can stably enter the water mixing tank according to the requirement, meets the requirement of the system on water quantity, and the third check valve prevents water flow from flowing backward.

[0011] As a further scheme of the utility model, the high-temperature hot water circuit between the high-temperature water tank water outlet and the high-temperature condenser water inlet is sequentially provided with a second circulating pump and a fourth check valve along the water outlet direction, a high-temperature water inlet valve is arranged on the high-temperature hot water circuit between the high-temperature water tank water inlet and the high-temperature condenser water outlet, a safety valve port is arranged on the high-temperature water tank, and a safety valve is arranged at the safety valve port.

[0012] The arrangement of the second circulating pump can ensure the smooth flow of high-temperature hot water in the circuit, enhance the water flow circulation efficiency, and ensure that the high-temperature water can be stably and timely delivered to the high-temperature condenser, thereby improving the heat exchange efficiency of the entire hot water circuit system, avoiding the heat efficiency reduction or equipment overload caused by poor water flow. The third check valve prevents water flow from flowing backward, ensures that hot water can only flow in the correct direction, avoids the high-temperature water from flowing backward to the high-temperature water tank or other circuit parts, and avoids damage or water pollution caused by backward flow. The high-temperature water inlet valve can accurately control the flow and temperature of the high-temperature water entering the high-temperature condenser, ensures that the condenser operates within a reasonable working temperature range, and avoids the influence of excessively high or low temperature on the efficiency and safety of the equipment. The safety valve can be automatically opened to release excessive pressure when the internal pressure of the water tank exceeds the safety range due to excessively high temperature or excessively large pressure in the system.

[0013] As a further scheme of the utility model, a water supplement pipeline is arranged between the high-temperature water tank water supplement port and the heat storage water tank, and the water supplement pipeline is sequentially provided with a water supply pump and a first check valve along the water supplement direction. The water supply pump ensures the flow stability during the water supplement process, ensures that the heat storage water tank can timely obtain sufficient water source, and the first check valve prevents water flow from flowing backward to ensure that the water flow flows from the water supplement source to the heat storage water tank.

[0014] As a further scheme of the utility model, a pressure gauge is arranged on the fluorine machine circulation circuit between the high-temperature level compressor and the high-temperature condenser.

[0015] As a further scheme of the utility model, a refrigerant is arranged in the fluorine machine circulation circuit for circulation and heat transfer.

[0016] Compared with the prior art, the system comprises a low-temperature hot water circulation system and a high-temperature hot water circulation system, a fluorine machine circulation system is arranged between the low-temperature hot water circulation system and the high-temperature hot water circulation system, a low-temperature condenser is coupled between the low-temperature hot water circulation system and the fluorine machine circulation system, and a high-temperature condenser is coupled between the fluorine machine circulation system and the high-temperature hot water circulation system.

[0017] The low-temperature hot water circulation system comprises a low-temperature hot water circuit, and a solar energy collector is arranged on the low-temperature hot water circuit, so that solar energy is effectively utilized as a heat source, energy consumption is reduced, environmental pollution is reduced, energy use efficiency is improved, and the concept of sustainable development is met. The solar energy collector is coupled with the low-temperature condenser, so that efficient storage and conversion of low-temperature hot water are realized. The fluorine machine circulation system serves as a medium for heat transfer and conversion, and efficiently adjusts the transfer of heat between the low-temperature system and the high-temperature system. Heat can be effectively exchanged between the low-temperature system and the high-temperature system, and the overall thermal efficiency of the system is improved. The flow and state of the refrigerant can be accurately controlled through components such as the gas-liquid separator, the filter, the liquid storage tank and the electronic expansion valve, so that stable heat transmission and efficient operation of the system are ensured.

[0018] The circulation of the low-temperature hot water system and the high-temperature hot water system is combined, and the fluorine machine circulation system is used for efficient heat transfer, so that the dependence on traditional energy (such as electricity and natural gas) can be reduced, the purposes of energy saving and cost reduction can be achieved, multi-energy complementation can be realized, the thermal efficiency can be improved, and the operation cost can be reduced. The water softener tank is connected to the water mixing tank, the hardness components (such as calcium and magnesium ions) in water are removed, scale deposition is prevented, the pipes and equipment in the system are improved, the water quality is improved, and the accumulation of scale is reduced. The high-temperature water tank is supplemented through the water mixing tank, the size of the high-temperature water tank is reduced, and the initial investment cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a system principle schematic view of the utility model.

[0020] In the figure: 1-low temperature hot water circulation system, 2-soft water tank, 3-low temperature stage condenser, 4-fluorine machine circulation system, 5-high temperature stage condenser, 6-high temperature hot water circulation system, 101-solar collector, 102-thermal storage water tank, 103-mixed water tank, 104-feed water pump, 105-first check valve, 106-first circulating pump, 107-second check valve, 201-first filter, 202-soft water pump, 203-third check valve, 204-soft water stop valve, 401-gas-liquid separator, 402-high temperature stage compressor, 403-pressure gauge, 404-second filter, 405-liquid storage tank, 406-electronic expansion valve, 601-high temperature water tank, 602-second circulating pump, 603-fourth check valve, 604-safety valve, 605-high temperature water outlet, 606-high temperature hot water inlet, 661-high temperature water inlet valve, 607-high temperature water tank water filling port. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is further described in detail below through examples and in conjunction with the drawings. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0022] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connection (coupling). In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0023] In the utility model, unless otherwise specified and limited, the first feature is "on" or "under" the second feature, which means that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature means that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0024] As Figure 1As shown, a high-temperature hot water supply system of a solar cascade heat pump includes a low-temperature hot water circulation system 1 and a high-temperature hot water circulation system 6, and a fluorine machine circulation system 4 is arranged between the low-temperature hot water circulation system and the high-temperature hot water circulation system, a low-temperature level condenser 3 is coupled between the low-temperature hot water circulation system and the fluorine machine circulation system, and a high-temperature level condenser 5 is coupled between the fluorine machine circulation system and the high-temperature hot water circulation system.

[0025] The low-temperature hot water circulation system 1 includes a low-temperature hot water circuit, a solar heat collector 101 is arranged on the low-temperature hot water circuit, solar energy is collected, and the solar energy is converted into heat energy, which is transmitted to cold water to generate high-temperature hot water, a heat storage water tank 102 and a mixed water tank 103 are sequentially arranged on the low-temperature hot water circuit between the solar heat collector outlet and the low-temperature level condenser inlet, the solar heat collector heats the cold water into hot water with a temperature of 50-60℃, the hot water is stored in the heat storage water tank, and the hot water heated by the solar heat collector flows into the mixed water tank.

[0026] The mixed water tank 103 is connected with a soft water tank 2, the soft water tank stores low-temperature soft water with a temperature of 10-20℃ after softening treatment of municipal water, a soft water inlet pipeline is arranged between the soft water tank and the mixed water tank, and a first filter 201, a soft water pump 202, a soft water stop valve 204 and a third one-way valve 203 are sequentially arranged on the soft water inlet pipeline along the water inlet direction, the soft water stop valve 204 is opened, the soft water pump 202 is started, the softened low-temperature water is filtered through the first filter, and the softened low-temperature water is transported to the heat storage water tank through the third one-way valve to mix with the hot water with a temperature of 50-60℃ to form low-temperature hot water with a temperature of 40-50℃.

[0027] The first circulation pump 106 and the second one-way valve 107 are sequentially arranged on the low-temperature hot water circuit between the mixed water tank 103 and the low-temperature level condenser 3 along the water outlet direction, the first circulation pump 106 is opened, the low-temperature hot water is transported to the low-temperature level condenser, heat is transmitted to the fluorine machine circulation system 4 through heat exchange, and the low-temperature hot water with a temperature of 35-45℃ returns to the solar heat collector 101 to complete the circulation process of the low-temperature hot water circulation system.

[0028] The fluorine machine circulation system 4 includes a fluorine machine circulation circuit, and a refrigerant is arranged in the fluorine machine circulation circuit to circulate and transmit heat, a gas-liquid separator 401 and a high-temperature level compressor 402 are sequentially arranged on the fluorine machine circulation circuit between the low-temperature level condenser outlet and the high-temperature level condenser inlet, a second filter 404, a liquid storage tank 405 and an electronic expansion valve 406 are sequentially arranged on the fluorine machine circulation circuit between the high-temperature level condenser outlet and the low-temperature level condenser inlet, and a pressure gauge 403 is arranged on the fluorine machine circulation circuit between the high-temperature level compressor and the high-temperature level condenser.

[0029] The refrigerant in the low-temperature stage condenser absorbs heat from the low-temperature hot water circulation system, is separated by a gas-liquid separator, is throttled by an electronic expansion valve 406, is compressed and heated by a high-temperature stage compressor, transmits heat to the high-temperature hot water circulation system through a high-temperature stage condenser, and is cooled by heat exchange, and then flows through the low-temperature condenser again to absorb heat provided by the low-temperature hot water circulation system, thereby completing the circulation process of the fluorine machine circulation system 4.

[0030] The high-temperature hot water circulation system 6 comprises a high-temperature hot water circuit, and a high-temperature water tank 601 is arranged on the high-temperature hot water circuit. A high-temperature water outlet and a water replenishing port are arranged on the high-temperature water tank. The high-temperature water outlet 605 is connected with an external water terminal. The water replenishing port of the high-temperature water tank is in communication with the heat storage water tank 102. The high-temperature hot water circuit between the high-temperature water outlet of the high-temperature water tank and the water inlet of the high-temperature condenser is sequentially provided with a second circulating pump 602 and a fourth one-way valve 603 in the water outlet direction. A high-temperature water inlet valve 661 is arranged on the high-temperature hot water circuit between the water inlet 606 of the high-temperature water tank and the water outlet of the high-temperature condenser. A safety valve port is arranged on the high-temperature water tank, and a safety valve 604 is arranged at the safety valve port.

[0031] A water replenishing pipeline is arranged between the water replenishing port 607 of the high-temperature water tank and the heat storage water tank. The water replenishing pipeline is sequentially provided with a water supply pump 104 and a first one-way valve 105 in the water replenishing direction.

[0032] The water supply pump 104 is turned on, and the heat storage water tank supplies 50-60 DEG C hot water to the high-temperature water tank 601 through the water supply pump 104 and the first one-way valve 105 on the water replenishing pipeline for water replenishment. The water in the high-temperature water tank is transported to the high-temperature condenser through the second circulating pump 602 and the fourth one-way valve 603 to absorb heat from the refrigerant of the fluorine machine circulation system 4, and the high-temperature hot water with a temperature of 80-90 DEG C enters the high-temperature water tank 601 through the high-temperature water tank inlet, and the high-temperature hot water is provided to the external water terminal through the high-temperature hot water outlet, thereby completing the preparation and supply process of the high-temperature hot water.

[0033] The electrical components in the present application are connected with the main controller and 380V commercial power supply, and the main controller can be a conventional known device such as a computer.

[0034] In the description of the present application, the terms "connection", "installation", "fixation", "arrangement" and the like are understood in a broad sense, for example, "connection" is fixed connection or indirect connection through intermediate components without affecting the component relationship and technical effects, or is integral connection or partial connection, and the specific meanings of the above terms in the present application or application can be understood according to specific circumstances by those skilled in the art.

[0035] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high temperature hot water supply system of a solar cascade heat pump, characterized by: The system comprises a low-temperature hot water circulation system (1) and a high-temperature hot water circulation system (6), and a fluorine machine circulation system (4) is arranged between the low-temperature hot water circulation system and the high-temperature hot water circulation system; a low-temperature level condenser (3) is coupled between the low-temperature hot water circulation system and the fluorine machine circulation system; and a high-temperature level condenser (5) is coupled between the fluorine machine circulation system and the high-temperature hot water circulation system. The low-temperature hot water circulation system (1) comprises a low-temperature hot water circuit, and a solar heat collector (101) is arranged on the low-temperature hot water circuit; a heat storage water tank (102) and a mixed water tank (103) are sequentially arranged on the low-temperature hot water circuit between a water outlet of the solar heat collector and a water inlet of the low-temperature level condenser. The fluorine machine circulation system (4) comprises a fluorine machine circulation circuit, and a gas-liquid separator (401) and a high-temperature level compressor (402) are sequentially arranged on the fluorine machine circulation circuit between an outlet of the low-temperature level condenser and an inlet of the high-temperature level condenser; a second filter (404), a liquid storage tank (405) and an electronic expansion valve (406) are sequentially arranged on the fluorine machine circulation circuit between an outlet of the high-temperature level condenser and an inlet of the low-temperature level condenser. The high-temperature hot water circulation system (6) comprises a high-temperature hot water circuit, and a high-temperature water tank (601) is arranged on the high-temperature hot water circuit; a high-temperature water outlet (605) and a water supplement inlet (607) are arranged on the high-temperature water tank; an external water terminal is connected to the high-temperature water outlet; and the water supplement inlet of the high-temperature water tank is connected to the heat storage water tank (102).

2. The solar cascade heat pump high-temperature hot water supply system according to claim 1, characterized in that: The mixed water tank (103) is connected to a soft water tank (2), and a soft water inlet pipeline is arranged between the soft water tank and the mixed water tank; the soft water inlet pipeline is sequentially provided with a first filter (201), a soft water pump (202), a soft water stop valve (204) and a third one-way valve (203) along an inlet direction.

3. The solar cascade heat pump high temperature hot water supply system according to claim 1, characterized in that: The low-temperature hot water circuit between the mixed water tank (103) and the low-temperature level condenser (3) is sequentially provided with a first circulating pump (106) and a second one-way valve (107) along an outlet direction.

4. The solar cascade heat pump based high temperature hot water supply system according to claim 1, characterized in that: The high-temperature hot water circuit between the high-temperature water tank outlet and the high-temperature level condenser inlet is sequentially provided with a second circulating pump (602) and a fourth one-way valve (603) along an outlet direction; a high-temperature water inlet valve (661) is arranged on the high-temperature hot water circuit between a high-temperature water inlet (606) and a high-temperature level condenser outlet; a safety valve (604) is arranged at a safety valve port of the high-temperature water tank.

5. A solar cascade heat pump based high temperature hot water supply system according to claim 4, wherein: A water supplement pipeline is arranged between the high-temperature water tank water supplement inlet and the heat storage water tank; the water supplement pipeline is sequentially provided with a water supply pump (104) and a first one-way valve (105) along a water supplement direction.

6. The solar cascade heat pump based high temperature hot water supply system according to claim 1, characterized in that: A pressure gauge (403) is arranged on the fluorine machine circulation circuit between the high-temperature level compressor (402) and the high-temperature level condenser (5).

7. A solar cascade heat pump based high temperature hot water supply system according to claim 6, wherein: A refrigerant is arranged in the fluorine machine circulation circuit to circulate and transfer heat.

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