CN201138067Y - A fluorine pipeline system air source heat pump water heater with energy-saving circulation - Google Patents

Abstract

An air-source heat pump water heater with energy-saving circulation and a fluorine pipeline system. The whole machine is divided into two parts: an outdoor unit and an indoor unit. The outdoor unit is composed of a compressor, a finned air-cooled heat exchanger, an energy-saving circulator and other accessories; the indoor unit is composed of an insulated hot water tank with a water distributor, a plate or casing fluorine water heat exchanger, and a circulating water pump , controller and other accessories. The utility model adopts an energy-saving circulator, which greatly reduces the exhaust pressure of the compressor and improves the heating energy efficiency ratio (EER); the water distributor is used to realize good temperature stratification in the hot water tank; the throttling mechanism adopts expansion when used in the northern region The valve is used to ensure efficient and reliable operation in winter. When used in the southern region, the throttling mechanism adopts capillary tubes to reduce costs; the waterways are placed indoors, and the indoors and outdoors are connected by refrigerant pipelines to avoid the risk of pipes freezing and cracking in winter; the heat pump water heater has high efficiency and energy saving , safe and reliable, flexible installation, adapt to a wide range of regions and climates and other outstanding advantages.

Description

A fluorine pipeline system air source heat pump water heater with energy-saving circulation

technical field

The utility model relates to a fluorine pipeline system type air source heat pump water heater with an energy-saving circulation, which adopts an energy-saving circulation to improve the refrigeration system, adopts a water distributor to improve a hot water tank, and adopts a fluorine pipeline system to adapt to the winter climate, belonging to the air source heat pump The field of heating technology.

Background technique

Among the water heaters widely used at present, electric water heaters consume a lot of energy and have high operating costs, gas water heaters have serious safety problems and are limited by gas sources, and solar water heaters are too affected by factors such as sunlight and space occupation. The heat pump water heater adopts the compressor refrigeration system to absorb heat from the outdoor air, and heats the tap water to the required temperature through the fluorine water heat exchanger to be used as domestic hot water. Its power consumption is only 1/4 of that of the electric water heater. The annual comprehensive operating cost is much lower than that of electric water heaters, and much lower than that of gas water heaters and solar water heaters. It is energy-saving, environmentally friendly, safe and reliable, easy to install, use and maintain, and is suitable for comprehensive promotion.

Most of the existing air source heat pump water heaters place the condenser for heating water in the hot water tank. Once the relevant parts leak or have other failures, the refrigerant will enter the hot water tank or the refrigeration system will enter the water. And maintenance is difficult.

Existing heat pump water heaters basically do not use energy-saving circulators. Because heating domestic hot water to the design temperature (generally around 50-60°C) requires a high condensation temperature, the exhaust pressure is high and the compression ratio is too large, especially It is more serious in winter conditions. On the one hand, the energy efficiency ratio EER (heating capacity/input power) is greatly reduced, which increases power consumption and deteriorates economy. On the other hand, the failure rate of compressors and other components increases and the life span is shortened. .

The smoldering heat exchange adopted by the existing heat pump water heater, which places the condenser in the water tank, has a low heat exchange capacity on the water side; while a few of them use the condenser outside the water tank, often due to the failure to achieve a good temperature in the water tank Stratification has a serious impact on system operation and performance indicators, and some structures are too complex to achieve better temperature stratification, and the temperature of the water body in the lower part of the water storage tank is low, and the volume utilization rate is poor.

Contents of the invention

The purpose and task of this utility model is to creatively introduce energy-saving refrigeration cycle technology in view of the above-mentioned various problems, make many improvements to the structure of the whole machine system, realize the purpose of high-efficiency, energy-saving, stable and reliable production of domestic hot water, and make the whole machine The machine has compact structure, convenient assembly and low cost.

For this reason, the utility model has designed a kind of fluorine pipeline system type air source heat pump water heater with energy-saving circulation, and its complete machine is divided into outdoor unit (1) and indoor unit (19) two parts. The outdoor unit (1) is composed of a compressor (5), a finned air-cooled heat exchanger (2), an energy-saving circulator (8) and other accessories; the indoor unit (19) is composed of a water distributor (18) It is composed of thermal insulation hot water tank (11), plate type or casing type fluorine water heat exchanger (9), circulating water pump (10), controller (21) and other accessories. There is no fluorine water heat exchanger in the hot water tank, which avoids a series of problems caused by refrigerant leakage. The inlet end of the fluorine circuit of the plate or casing type fluorine water heat exchanger (9) is connected to the outlet of the compressor (5), and the outlet end is connected to the inlet of the dry filter (6); the inlet end of the liquid side of the energy-saving circulator (8) is connected to the dryer The outlet of the filter (6) is connected, and the outlet end is connected with the inlet of the throttling mechanism (7); the inlet end of the energy-saving circulator (8) on the steam side is connected with the outlet of the finned air-cooled heat exchanger (2), and the outlet end is connected with the vapor-liquid The inlet end of the separator (4) is connected; the inlet end of the waterway of the fluorine water heat exchanger (9) is connected with the water distributor (18) at the lower part of the closed hot water tank (11) through the circulating water pump (10), and the outlet end is connected with the upper inlet port. The water distributor (18) used for water is connected; the controller (21) adopts a single-chip microcomputer, the input end is the temperature sensor (20) at the bottom of the hot water tank (11), and the output end is the compressor (5), fan (3) and Water pump (10), and realize start-stop control.

The energy-saving circulator (8) adopts an outer-finned coil type or a casing type or a plate type fluorine-fluorine heat exchanger. The use of an energy-saving circulator can effectively increase the exhaust temperature to maintain or even greatly increase the outlet water temperature level (up to 60-75°C) when the condensing temperature is kept at a low temperature level (30-45°C), that is, when the exhaust pressure is low ), while the energy efficiency ratio of the system is kept at a very high level, which is difficult for general air-cooled heat pumps and air-source heat pump water heaters to achieve, and the reduction of exhaust pressure can effectively reduce the possibility of failure of various components such as compressors, and prolong the entire life. machine life.

The hot water tank (11) is an airtight pressure vessel. The cylinder body is composed of stainless steel inner wall (13), color steel outer wall (12) and polyurethane foam insulation layer (14). The lower part is connected to tap water inlet pipe (16), and the upper part is connected to domestic heat. The water outlet pipe (17) is connected to the drain pipe (15) at the bottom, and the temperature sensor (20) is set at the bottom of the tank, and some diameters are provided on the water distributor. Orifices with a diameter of 6-16mm. The water distributor can greatly improve the temperature stratification of the water body in the tank, and it is convenient to heat all the water above the temperature sensor to the required temperature level, which greatly improves the utilization rate of the tank volume and saves the space of the hot water tank. The tap water inlet and the bottom heating water outlet share the same water pipe and water distributor, which makes the structure more compact and reasonable.

The connecting pipe between the indoor unit and the outdoor unit is a refrigerant pipe, so there is no danger of the pipe being cracked by freezing in winter. For the models used in the north, an auxiliary electric heater can be installed on the air inlet of the air-cooled heat exchanger of the outdoor unit to facilitate the normal startup of the refrigerator.

The utility model greatly improves the energy efficiency ratio, truly realizes high efficiency, energy saving, stable and reliable operation, long product life, convenient installation, use and maintenance, and wide adaptability to regions and climates.

Description of drawings

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

The numbers and names of the parts in Figure 1 are as follows:

Outdoor unit 1, finned air-cooled heat exchanger 2, fan 3, vapor-liquid separator 4, compressor 5, dry filter 6, throttling mechanism 7, energy-saving circulator 8, fluorine water heat exchanger 9, water pump 10. Hot water tank 11, outer wall of color steel plate 12, inner wall of stainless steel 13, polyurethane foam insulation layer 14, drain pipe 15, tap water inlet pipe 16, domestic hot water outlet pipe 17, water distributor 18, indoor unit 19, temperature sensor 20. Controller 21.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific implementation and application examples.

Accompanying drawing 1 is the whole machine structure schematic diagram of the present utility model.

Complete machine is divided into outdoor unit (1) and indoor unit (19) two parts. The outdoor unit (1) is composed of a compressor (5), a finned air-cooled heat exchanger (2), an energy-saving circulator (8) and other accessories; the indoor unit (19) is composed of a water distributor (18) It is composed of thermal insulation hot water tank (11), plate type or casing type fluorine water heat exchanger (9), circulating water pump (10), controller (21) and other accessories. The inlet end of the fluorine circuit of the plate or casing type fluorine water heat exchanger (9) is connected to the outlet of the compressor (5), and the outlet end is connected to the inlet of the dry filter (6); the inlet end of the liquid side of the energy-saving circulator (8) is connected to the dryer The outlet of the filter (6) is connected, and the outlet end is connected with the inlet of the throttling mechanism (7); the inlet end of the energy-saving circulator (8) on the steam side is connected with the outlet of the finned air-cooled heat exchanger (2), and the outlet end is connected with the vapor-liquid The inlet end of the separator (4) is connected; the inlet end of the waterway of the fluorine water heat exchanger (9) is connected with the water distributor (18) at the lower part of the closed hot water tank (11) through the circulating water pump (10), and the outlet end is connected with the upper inlet port. The water distributor (18) used for water is connected; the controller (21) adopts a single-chip microcomputer, the input end is the temperature sensor (20) at the bottom of the hot water tank (11), and the output end is the compressor (5), fan (3) and Water pump (10), and realize start-stop control. The energy-saving circulator (8) adopts an outer-finned coil type or a casing type or a plate type fluorine-fluorine heat exchanger. The hot water tank (11) is an airtight pressure vessel. The cylinder body is composed of stainless steel inner wall (13), color steel outer wall (12) and polyurethane foam insulation layer (14). The lower part is connected to tap water inlet pipe (16), and the upper part is connected to domestic heat. The water outlet pipe (17) is connected to the drain pipe (15) at the bottom, and the temperature sensor (20) is set at the bottom of the tank, and some diameters are provided on the water distributor. Orifices with a diameter of 6-16mm.

The utility model workflow is as follows:

(a) Preparation: Fill the hot water tank with water, and ensure that the temperature at the bottom of the water body in the tank is lower than the set value.

(b) Start: The control system first starts the fan and the water pump, and then starts the compressor for the heat pump cycle.

(c) Heating: The refrigerant cycle process is as follows: the compressor absorbs less heat than the gaseous refrigerant and compresses, discharges high-temperature and high-pressure superheated steam, enters the fluorine water heat exchanger to release heat to domestic hot water, and becomes high-temperature and high-pressure liquid refrigeration After passing through the dry filter to remove possible dirt and water, it enters the energy-saving circulator and is cooled by low-temperature steam, and the supercooled liquid is throttled and depressurized to become a low-temperature, low-pressure vapor-liquid two-phase flow state with low dryness. , enters the evaporator to absorb the heat of the air outside the evaporator, evaporates into a low-temperature and low-pressure gaseous refrigerant, and then exchanges heat with the high-temperature liquid refrigerant from the energy-saving circulator and the fluorine water heat exchanger, and becomes a medium-temperature and low-pressure superheated steam, which is inhaled The compressor continues to the next cycle. The domestic hot water heating process is as follows: the circulating water pump inhales low-temperature water through the water distributor at the bottom of the hot water tank and sends it to the fluorine water heat exchanger. After the water is heated to the required temperature, it enters the hot water through the water distributor at the upper part For the water tank, due to the function of the water distributor, the water drops slowly and evenly in the tank. The temperature-changing layer divides the water into the upper high-temperature water body and the lower low-temperature water body, and the position of the insulation layer gradually moves down until it falls to the position of the temperature sensor. After the process is completed, the heat pump system will automatically stop running.

(d) Access: The domestic hot water can be accessed through the upper water distributor, and the position of the insulation layer in the tank will rise accordingly. After a certain period of time, the heat pump system starts to run automatically, heats the mixed water of tap water and hot water tank outlet to the required temperature and sends it to the upper part of the hot water tank, and ensures that the outlet water temperature is at the required level.

(e) Out of service: When the domestic hot water is stopped, the heat pump system continues to run for a period of time until the position of the insulation layer is lowered to the position of the temperature sensor, that is, the hot water tank is full again, and the heat pump stops operating.

Claims (4)

1. A fluorine pipeline system air source heat pump water heater with energy-saving circulation. The whole machine is divided into two parts: an outdoor unit (1) and an indoor unit (19). It is characterized in that the plate or casing fluorine water heat exchanger ( 9) It is installed in the indoor unit, the inlet end of the fluorine circuit is connected to the outlet of the compressor (5), and the outlet end is connected to the inlet of the dry filter (6); the inlet end of the liquid side of the energy-saving circulator (8) is connected to the dry filter (6) The outlet is connected, and the outlet is connected to the inlet of the throttling mechanism (7); the inlet of the energy-saving circulator (8) on the steam side is connected to the outlet of the finned air-cooled heat exchanger (2), and the outlet is connected to the vapor-liquid separator (4) The inlet end is connected; the inlet end of the waterway of the fluorine water heat exchanger (9) is connected with the water distribution device (18) for the lower part of the closed hot water tank (11) through the circulating water pump (10), and the outlet end is connected with the water distribution device (18) for the upper water inlet. The indoor unit and the outdoor unit are connected through a refrigerant pipeline; the controller (21) adopts a single-chip microcomputer, the input end is the temperature sensor (20) at the bottom of the hot water tank (11), and the output end is the compressor (5), blower fan (3) and water pump (10), and realize start-stop control. 2. The fluorine pipeline system air source heat pump water heater with energy-saving circulation according to claim 1, characterized in that the energy-saving circulator (8) adopts an outer rib coil type or a casing type or a plate type fluorine-fluorine exchange heater. 3. The fluorine pipeline system air source heat pump water heater with energy-saving circulation according to claim 1, characterized in that the hot water tank (11) is a closed pressure vessel, and the cylinder body is made of stainless steel inner wall (13), colored Steel plate outer wall (12) and polyurethane foam insulation layer (14) constitute, the bottom connects tap water inlet pipe (16), the top connects domestic hot water outlet pipe (17), and the bottom connects drain pipe (15). 4. The fluorine pipeline system air source heat pump water heater with energy-saving cycle according to claim 1, characterized in that the water distributor (18) is a straight pipe or ring pipe or branch pipe structure, and the upper part is arranged The orifice of the water tank is upward, and the lower orifice is downward.

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