CN2708173Y - Air source heat pump water heater with adjustable capacity - Google Patents

Abstract

An air source heat pump water heater with adjustable capacity of the utility model is composed of a compressor, a gas-liquid segregator, a dry filter, a capillary module, an air-cooled heat exchanger, a condenser coil, a living hot-water tank, a temperature sensor and a controller. Three capillaries with different lengths are designed respectively according to the operating conditions of winter, summer and transition season and the three capillaries are connected in parallel to form the capillary module. Three refrigeration electromagnetic valve are used for controlling on-off of the capillary module. The season energy efficiency ratio of the air source heat pump water heater and the economic performance for running all the yearround can be greatly improved. The draught fan controller with the temperature sensor controls the rotation rate of the axial flow fan according to the degree of superheat of the cold-producing medium at the exit of the evaporator coil detected. Multi-segmentation automatic air conditioning function can be obtained. The evaporator can obtain reasonable air heat energy under any operating condition. The utility model has the advantages of efficient energy-saving, safety, reliability, long service life, simple operation, etc.

Description

Capacity adjustable air source heat pump water heater

FIELD

The present invention relates to an air source heat pump water heater, in particular, it relates to an air source heat pump water heater having a capacity of automatic adjustment function, belonging to the class of heating and air-conditioning energy technical field.

Background technique

Currently on the market generally sell our water heater water heater products for electric water heaters, gas water heaters and solar water heaters. Among them, electric water heaters to consume large amounts of expensive electricity expense, is not conducive to the rational use of energy; gas water heater there is a serious security risk in use, it has been reported poisoning incidents each year due to the use of gas water heater triggered; conventional solar water heater in the rainy days can not produce hot water, can only rely on electric heating to compensate for the lack of solar energy, and thus there is waste of energy, the use of this water heater is not very economical, especially in some of the more rainy days in the south. Accordingly, the heat pump water heater based on a new cycle begins on the principles of the food market emerge, which is an evaporator absorbs thermal energy (solar energy, air or water, etc.) from the surrounding environment, and the thermal energy released by the condenser to the tank in order to achieve the production of hot water. Heat pump water heaters with high efficiency, all-weather use, safe and reliable, but also to achieve a low-level use of energy, and has a broad development prospects.

Currently the vast majority of domestic production and sales of air-source heat pump water heaters are designed according to winter conditions and processing. The heat pump water heater in the summer season and the transition operation conditions, the refrigerant evaporation temperature (pressure) will increase as the outside air temperature rises, the pressure differential across the capillary decreases, since the length of the capillary tube is fixed, flowing into the evaporator of the heat pump refrigerant mass flow is reduced, the compressor suction superheat is increased, thereby affecting the efficiency and the volumetric efficiency of the compressor motor, or even cause the compressor does not work. Thus, in the mode of design according to the capillary length can not fully meet the needs of the operating conditions throughout the year, so that not only the average annual air source heat pump heating coefficient of performance of the heater is difficult to improve, but also the safety of the compressor, and stable operation and adversely affect the actual life. So far not retrieve relevant patents involving such materials problem-solving approach.

SUMMARY

Object of the present invention for the deficiencies of the prior art, to provide efficient heat pump water heater having a capacity of automatic adjustment function, the system can effectively solve the heat pump water heater operation and the capacity to match the year in question is adjusted to improve system SEER ( EER) and economic performance.

In order to achieve this object, the present invention in the aspect, the use of three different lengths of capillary parallel group consisting of capillaries, a conventional heat pump water heater in place of a single length of capillary used. The length of the capillary, respectively according to three winter, summer and transition season design condition, and uses them to control three cooling-off solenoid valve. In addition, a fan controller using a temperature sensor, an axial flow fan speed can be controlled according to the evaporator coil outlet refrigerant superheat degree detection, automatic multi-stage air volume adjustment function of the evaporator under all operating conditions are you can get a reasonable air heat.

The components of the compressor of the present invention, gas-liquid separator, drying filters, solenoid valves, capillary group, current collector, air-cooled heat exchanger, condensing coil, life hot water tank, temperature sensors and controllers and other components. The remaining three ports connected to a port of the compressor is connected to the exhaust port inside the condenser coil inlet life hot water tank, the outlet of the condenser coil and the dried collector filter / splitter, the flow collector / splitter respectively each through a solenoid valve with three unequal length of the capillary, connecting the inlet evaporator coils of the outlet end of the three capillaries and then connected in parallel by the one current collector / splitter, exit of the evaporator coil and then through the gas-liquid separator and the suction port of the compressor is connected so as to form a closed refrigerant circulation passage.

The compressor of the present invention fully closed rotary compressor, a gas-liquid separator provided in the suction side of the compressor to prevent the compressor produce wet compression. The three sets of the parallel capillaries of different lengths from the capillary, respectively three cooling solenoid valve is switched, applied respectively in winter, summer, fall and spring conditions. Capillary drying group upstream of the filter on the pipeline, to prevent the refrigerant moisture or impurities clogging the pipeline. Air-cooled heat exchanger from the evaporator coil and composition axial fan, the evaporator coils of the fin-tube structure, a multistage axial flow fan by a fan controller with a temperature sensor according to the evaporator coil of the refrigerant outlet superheat degree air volume control. Condensing coil in a spiral structure made from brass disc directly provided at the bottom of the hot water tank life, using condensation heat of the refrigerant to heat domestic hot water. Pressurized hot water tank is a living structure, water tank made of a stainless steel plate welded, filled with polyurethane foam insulation material between the liner and the housing. Upper tank is provided with a water outlet pipe, the lower portion is provided with a water inlet. The water tank may be directly connected to the inlet pipe network city water, water pressure will depend on the pressure of hot water from the top of the tank. To minimize the impact on the cold water tank temperature stratification, using the toroidal type inlet pipe, a diffuser is provided with a plurality of equally spaced holes on the wall. A temperature sensor inside the water tank is also equipped with an armouring, for measuring the temperature of the hot water tank. The controller can be arbitrarily set by the user of hot water temperature in the range 30 ~ 60 ℃, the tank when the water temperature is lower than the temperature of start up (to prevent frequent starts and stops of the compressor, the controller automatically generates a set temperature below 5 when the temperature ℃ start up), the controller will automatically start the compressor, until the hot water temperature reaches the set temperature, the compressor is automatically shut down.

The present invention uses three different lengths from the capillary the capillary parallel group, refrigerating machine using a solenoid valve control switch, respectively is applied in winter, summer, fall and spring conditions, can greatly improve air source heat pump water heater and annual SEER run economic performance. Air-cooled heat exchanger from the evaporator coil and axial fan composition, according to the evaporator coil of the refrigerant outlet superheat degree range, three stages of an axial flow fan air volume automatically adjusted to ensure the reliability of the compressor, efficient operation. The present invention effectively solves the heat pump water heater system in operation year-round matches and capacity adjustment problems, energy efficient, safe and reliable, long life, simple operation, highly commercial development and application prospects.

BRIEF DESCRIPTION

Figure 1 is a schematic view of the structure of the new utility.

In FIG 1, a drying filter, gas-liquid separator 2, the current collector / splitter 3, the solenoid valve 4, an evaporator coil 5, an axial flow fan 6, the fan controller 7, drain pan 8, the capillary 9, the compression 10, housing 11, water inlet 12, water tank 13, insulation layer 14, the tank housing 15, the outlet 16, the temperature sensor 17, a controller 18, a condenser coil 19.

Detailed ways

The drawings of the present invention the technical solution as described in further detail below in conjunction.

BRIEF 1 is a schematic overall novel configuration utility.

, The present invention is a filter drier 1, a gas-liquid separator 2, the current collector / splitter 3, the solenoid valve 4, an evaporator coil 5, an axial flow fan 6, the fan controller 7, drain pan 8 , a capillary 9, a compressor 10, a housing 11, water inlet 12, water tank 13, insulation layer 14, the tank housing 15, the outlet 16, the temperature sensor 17, a controller 18, a condenser coil 19 and other components. Inlet and exhaust port 19 of the condenser coil 10 is connected to the compressor outlet via the dry filter 19, a condensing coil current collector / splitter is connected to a port 3, the current collector / splitter of the remaining three ports 3 respectively, each through a solenoid valve 4 with three unequal length of the capillary 9 is connected, inlet after the outlet end of the three capillaries 9 again splitter 3 in parallel by the one current collector / together with the evaporator coil 5 is connected to outlet of the evaporator coil 5 2 through the gas-liquid separator connected to an intake port of the compressor 10 so as to form a closed refrigerant circulation passage. Drain pan 8 is provided below the evaporator coil 5, and a condensate line through the bottom of the condensate water in the humid air formed in the evaporator coil surface condensation derived. 6 is an axial flow fan speed is automatically controlled by the fan controller with two temperature sensors T 7. Two fan controller T of the temperature sensor 7 are provided on the evaporator coil inlet, the outlet pipe 5, in order to detect the degree of superheat of the refrigerant. All the cooling member, in addition to condenser coil are enclosed within a housing 11, a heat pump water heater outdoor unit.

The refrigerant cycle is as follows: through the liquid refrigerant into the evaporator orifice of the capillary tube 9 coils 5, convective heat exchange with the outdoor air under the action of the axial flow fan 6, is evaporated by absorbing heat in the air, then dried gas-liquid separator 10 into the compressor 2, is compressed into the condenser coil 19 where the heat of condensation released to the water in the water container 13, the refrigerant liquid dried filter 1 after condensation, the solenoid valve 4, re capillary 9 into the evaporator coil 5, thereby completing a cycle.

Life of the hot water tank inlet pipe 12, a water tank 13, insulation layer 14, the tank housing 15, outlet pipe 16, the temperature sensor 17, a controller 18, a condenser coil 19 composed. Condensing coil 19 is provided at a lower portion of the tank 13, inlet 12 and outlet 16 are provided in the upper top and bottom liner, the temperature sensor 13 is provided at 17 in the liner 13. Inlet pipe 12 is connected to the water pipe network, open the valve on the hot water outlet pipe 16 o'clock, the tap water head pressure of the hot water. The controller 18 is embedded in the insulating layer 14, which is exposed on the control panel housing the tank 15. The controller 18 to detect the signal of the temperature sensor 17 as an input variable, the final temperature (30 ~ 60 ℃) and the temperature sensor 17 detects the temperature, to achieve the automatic start and stop of the compressor 10 is controlled according to the hot water set by the user. 18, the user can also select an appropriate capillary length different seasons three state conditions solenoid valve 4 is switched by the controller according to.

Claims (3)

A variable capacity air source heat pump water heater, including an evaporator coil (5), the compressor (10), and a condenser coil (19) disposed in life hot water tank, wherein the compressor ( inlet 10) and an exhaust port condenser coil (19) is connected to the condenser coil (19) through the outlet of the drying filter (1) and the collector / splitter (3) is connected to a port, the current collector / splitter the remaining three ports (3), respectively, each through a solenoid valve (4) with three different length of the capillary (9) is connected, three capillary (9) the outlet end and then (3) in parallel by the one current collector / splitter connected to the evaporator coil inlet (5) after it, the evaporator coils (5) of the gas-liquid separator via an outlet (2) and the compressor (10) is connected to the intake port, so as to form a closed refrigerant circulation passage; controlling the evaporation coil (5) and the axial-flow fan (6) consisting of air-cooled heat exchanger, the axial flow fan (6) is automatically controlled by the fan rotational speed controller (7), embedded in the tank insulation (14) (18) to be disposed in the water tank temperature sensor (17) of the detection signal as input, the user set the final temperature of the hot water automatically start and stop the compressor (10), and Seasonal conditions with three state electromagnetic valve (4) is switched.

2. The capacity of the adjustable air source heat pump water heater as claimed in claim 1, characterized in that said three capillaries (9) respectively in winter and summer seasons, and transition conditions for design, and each of three solenoid valves (4) perform on-off control.

Capacity adjustable air source heat pump water heater as claimed in claim 1, characterized in that said fan controller (7) with two temperature sensors (T), are provided in the evaporator coil inlet (5), outlet pipe, to detect the degree of superheat of the refrigerant.