CN201138066Y - A water pipeline system type air source heat pump water heater with energy-saving circulation - Google Patents

Abstract

The utility model relates to a water-pipeline system-typed air-source heat-pump water heater with energy-saving circulation, and consists of an outdoor machine and an indoor machine, wherein, the outdoor machine is composed of a compressor, a finned-typed wind-cool heat exchanger, an energy-saving circulator, a plate-typed or a bushing-typed fluorine-water heat exchanger, a circular water pump and other parts; the indoor machine is composed of a heat-preservation hot-water tank with a water distributor, a controller and other parts. The indoor machine is connected with the outdoor machine through a water pipeline, so that the water heater is applicable to the southern area with winter being free from icing; moreover, the outdoor part of the water pipe preserves the heat; the fluorine-water heat exchanger is out-built; a water pump is adopted for the hot-water circulation. The water heater adopts the energy-saving circulator, thereby greatly reducing the air discharging pressure of the compressor and improving the heat-production energy efficiency ratio (EER); the water distributor is adopted, so that the temperature inside the hot-water tank can be better layered; a capillary pipe is adopted as the throttle mechanism, so as to reduce the cost; the heat-pump water heater has the outstanding advantages of high-efficient energy conservation, safety, reliability, flexible installation, low cost, strong adaptability for the installation position of the user, etc.

Description

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

technical field

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

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 for the above-mentioned problems, make many improvements to the system structure of the whole machine, 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 water 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) consists of a compressor (5), a finned air-cooled heat exchanger (2), an energy-saving circulator (8), a plate or casing fluorine water heat exchanger (9), and a circulating water pump (10) and other fittings; the indoor unit (19) is made up of a thermal insulation hot water tank (11) with a water distributor (18), a controller (21) and other fittings. There is no fluorine water heat exchanger in the hot water tank, which avoids a series of problems caused by refrigerant leakage. Both the fluorine water heat exchanger and the water pump are installed in the outdoor unit, so the space occupied by the indoor part is reduced, and there are no moving parts, which will not cause noise problems. 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 connection pipe between the indoor unit and the outdoor unit is a water pipe. Compared with the connection with the refrigerant pipe, there is no problem that the refrigerant pipe is too long to affect the performance of the heat pump. The indoor part is mainly a water storage tank, which occupies a small volume , can better adapt to the user's installation location and other requirements.

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 strong adaptability to user installation positions and spaces.

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) consists of a compressor (5), a finned air-cooled heat exchanger (2), an energy-saving circulator (8), a plate or casing fluorine water heat exchanger (9), and a circulating water pump (10) and other fittings; the indoor unit (19) is made up of a thermal insulation hot water tank (11) with a water distributor (18), a controller (21) and other fittings. 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 rib coil type or a sleeve type or a plate type fluorine-fluorine heat exchanger. The hot water tank (11) is a closed pressure vessel, and the cylinder body is composed of a stainless steel inner wall (13), a color steel outer wall (12) and a polyurethane foam insulation layer (14). The lower part is connected to the 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 a temperature sensor (20) is set at the very bottom of the tank, and some diameters are provided on the water distributor to be 6～16mm orifices.

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 kind of water piping system formula air source hot pump water heater with cycles, economized, complete machine is divided into off-premises station (1) and indoor set (19) two parts, it is characterized in that board-like or bushing type fluorine water-to-water heat exchanger (9) is arranged at off-premises station, its fluorine road entrance point links to each other with compressor (5) outlet, and the port of export links to each other with device for drying and filtering (6) import; The outlet of cycles, economized device (8) liquid side-entrance end and device for drying and filtering (6) links to each other, and goes out the beginning to link to each other with throttle mechanism (7) import; Cycles, economized device (8) vapour side-entrance end links to each other with finned air cooling heat exchanger (2) outlet, and the port of export links to each other with vapour liquid separator (4) entrance point; Fluorine water-to-water heat exchanger (9) water route entrance point links to each other with water-locator (18) with airtight hot-water cylinder (11) bottom water outlet by water circulating pump (10), and the port of export links to each other with the water-locator (18) of top water inlet usefulness; Water circulating pump is arranged at off-premises station, is connected by water lines between indoor set and the off-premises station; Controller (21) adopts single-chip microcomputer, and input is the temperature sensor (20) of hot-water cylinder (11) bottom, and output is compressor (5), blower fan (3) and water pump (10), and realizes start and stop control.

2, the water piping system formula air source hot pump water heater of band cycles, economized as claimed in claim 1 is characterized in that described cycles, economized device (8) adopts external fin coiled or bushing type or board-like fluorine fluorine heat exchanger.

3, the water piping system formula air source hot pump water heater of band cycles, economized as claimed in claim 1, it is characterized in that described hot-water cylinder (11) is the seal-off pressure container, cylindrical shell is made of stainless steel inwall (13), color steel outer wall (12) and polyurethane foam heat-insulation layer (14), the bottom connects running water water inlet pipe (16), the top hot water outlet pipe alive (17) that delivers a child, the bottom connects tapping pipe (15).

4, the water piping system formula air source hot pump water heater of band cycles, economized as claimed in claim 1 is characterized in that described water-locator (18) is straight tube or endless tube or dendritic tubular construction, and water-locator aperture, top upwards, and the aperture, bottom is downward.

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