CN2758650Y - Self-overlay air source heat pump water heater - Google Patents

Abstract

The utility model is a self-cascading air source heat pump water heater, comprising a compressor, a condenser, a water storage tank, a gas-liquid separator, an evaporation-condenser, a regenerator, an evaporator, a fan, a defrosting heater, two A throttle valve, seven temperature sensors, four controllers and two motors, the refrigerant pipeline connects the compressor, condenser, evaporator-condenser, regenerator, evaporator, and throttle valve to form a self- The cascade air source heat pump circulates, and the condenser is installed in the water storage tank. The utility model provides heat from the air source, and through the circulation of the refrigerant, the heat released in the condenser heats the water in the water storage tank. The water storage tank is insulated with thermal insulation materials, and an air pressure balance pipe is installed on the top. Because the utility model adopts a self-cascading heat pump cycle, it can work normally when the ambient air temperature is low, can supply heat around the clock, has good adaptability throughout the year, and has the advantages of simple structure and convenient installation. The utility model can be widely applied to people's production and living water.

Description

Self-cascading air source heat pump water heater

Technical field

The utility model belongs to the technical field of water heaters, in particular to a self-cascading air source heat pump water heater.

Background technique

The provision of domestic hot water throughout the year has become one of the important symbols of modern high-quality life. At present, traditional electric water heaters directly consume expensive high-quality electric energy, and the thermal efficiency will not exceed 100%, and there are safety hazards such as easy leakage. It meets the requirements of my country's energy policy and sustainable development strategy. Traditional solar water heaters mainly rely on electricity to heat hot water in cloudy, rainy, snowy weather and winter when there is insufficient sunshine, which consumes a lot of power and has poor safety. In addition, there are disadvantages such as poor balance of heating capacity and low utilization rate of the device throughout the year. The current single-cycle air source heat pump water heater with a single working fluid cannot work with high efficiency or even fail to work due to a large compression ratio when the ambient air temperature is low.

Contents of utility model

The purpose of the utility model is to provide a self-cascading air source heat pump water heater aiming at the deficiencies in the prior art. The utility model utilizes the self-cascading air source heat pump circulation to realize a high compression ratio and a large temperature difference working environment, and can still provide hot water at 65°C normally when the ambient air temperature is lower than 0°C, which improves the system structure and enables It has the advantages of simple structure, cheap price, convenient installation and operation, etc., and is convenient for popularization and application.

In order to achieve the above object, the utility model adopts the following technical solutions:

The self-cascading air source heat pump water heater of the utility model includes a compressor, a condenser, a water storage tank, a gas-liquid separator, an evaporation-condenser, a regenerator, an evaporator, a fan, a defrosting heater, two throttling Valves, seven temperature sensors, four controllers and two motors, the exhaust port of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the gas-liquid separator, and the gas-liquid separator The outlet of the liquid outlet is connected to the first throttle valve, the outlet of the first throttle valve, the outlet of the low-temperature fluid of the regenerator, and the inlet of the low-temperature fluid of the evaporator-condenser are connected to each other and there is a node, the evaporation- The outlet of the low-temperature fluid of the condenser is connected to the compressor, the inlet of the low-temperature fluid of the regenerator is connected to the outlet of the evaporator, the inlet of the evaporator is connected to the outlet of the second throttle valve, and the inlet of the second throttle valve is connected to the outlet of the evaporator. The outlet of the high-temperature fluid of the regenerator is connected, the inlet of the high-temperature fluid of the regenerator is connected with the outlet of the high-temperature fluid of the evaporator-condenser, and the inlet of the high-temperature fluid of the evaporator-condenser is connected with the outlet of the gas-liquid separator to form a refrigerant The closed channel of the self-cascade heat pump cycle; the compressor is also connected to the first motor; the condenser is installed in the water storage tank, and the temperature sensor at the outlet of the water storage tank is connected to the first controller, and the first controller It is connected with the first motor to control the start and stop of the heat pump system; the second and third temperature sensors are connected to the second controller, which are respectively at the outlet of the low-temperature fluid of the evaporator-condenser and the outlet of the first throttle valve , the second controller is connected to the first throttle valve to adjust the opening degree of the first throttle valve; the fourth and fifth temperature sensors are connected to the third controller, which are respectively located at the evaporator At the outlet and inlet, the third controller is connected with the second throttle valve to adjust the opening degree of the second throttle valve; the sixth and seventh temperature sensors are connected to the fourth controller, respectively At the middle position on the left and right sides of the evaporator, the fourth controller is also connected with the defrosting heater and the second motor, and the defrosting heater is automatically turned on and off according to the frosting thickness on the air side of the evaporator for defrosting; The above-mentioned fan is connected with the second motor, and the fan is located directly opposite to the defrosting heater to enhance convective heat transfer on the air side of the evaporator.

The water storage tank is insulated with thermal insulation materials, and an air pressure balance pipe is installed on the top.

The connection between the parts of the closed channel of the refrigerant self-cascading heat pump cycle formed in the utility model is connected by pipelines, and the tubes are wrapped with heat-preserving and waterproof materials.

The compressor is the power machine of the entire cascade heat pump cycle, which plays the role of transporting refrigerant, so that the condenser, evaporator-condenser and evaporator form a certain pressure difference; the condenser is a heat output device, and the heat released is used for heating Hot water, in which the refrigerant condenses and releases heat, most of the refrigerant with a high boiling point and a small amount of low boiling point refrigerant condenses into a liquid; the water storage tank is a container for storing hot water; the gas-liquid separator separates the condensed refrigerant liquid It is separated from the uncondensed refrigerant vapor; the second throttling valve throttles the refrigerant liquid and reduces the pressure; the evaporator-condenser uses most of the high boiling point refrigerant and a small amount of low boiling point refrigerant to evaporate and refrigerate to absorb most of the low boiling point work. The heat of condensation of the refrigerant and a small amount of high-boiling point refrigerant condenses most of the low-boiling point refrigerant and a small amount of high-boiling point refrigerant vapor into liquid; the regenerator uses the low-temperature refrigerant vapor from the evaporator to convert large Part of the refrigerant liquid with low boiling point and a small amount of high boiling point refrigerant is further subcooled; the fan is used to enhance the convection heat transfer on the air side of the evaporator; Frost.

The utility model uses pipelines to connect the compressor, condenser, evaporator-condenser, regenerator, evaporator, and throttle valve to form a self-cascade air source heat pump cycle. Element separation makes two mixed working fluids flow and transfer energy at the same time in the whole cycle, which has the characteristics of cascade heat pump cycle, and its separation process is a balanced separation process.

Compared with the prior art, the utility model has the following beneficial effects:

Using the self-cascading air source heat pump cycle can realize the working environment with high compression ratio and large temperature difference, and can still provide hot water at 65°C when the ambient air temperature is lower than 0°C, which improves the system structure and makes it structurally The utility model has the advantages of simplicity, cheap price, convenient installation and operation, etc., and is convenient for popularization and application.

Description of drawings

Fig. 1 is a structural schematic diagram of a self-cascading air source heat pump water heater of the present invention.

In the figure: 1-compressor 2-condenser 3-water storage tank 4-gas-liquid separator 5-evaporator-condenser 6-regenerator 7-first throttle valve 8-evaporator 9-second section Flow valve 10-fan 11-defrosting heater 12, 13, 14, 15, 16, 17 and 18 are respectively the first, second, third, fourth, fifth, sixth and seventh temperature sensor 19 , 20, 21 and 22 are respectively the first, second, third and fourth controllers 23 and 24 are respectively the first and second motors

Detailed ways

In order to better understand the utility model, the utility model will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the self-cascading air source heat pump water heater of the present invention includes a compressor 1, a condenser 2, a water storage tank 3, a gas-liquid separator 4, an evaporation-condenser 5, a regenerator 6, and an evaporator 8. Fan 10, defrosting heater 11, first throttle valve 7 and second throttle valve 9, first, second, third, fourth, fifth, sixth, seventh temperature sensors 12, 13, 14, 15, 16, 17 and 18 respectively, the first, second, third and fourth controllers are 19, 20, 21 and 22 respectively, and the first and second motors are 23 respectively and 24, the exhaust port of the compressor 1 is connected with the air inlet of the condenser 2, the outlet of the condenser 2 is connected with the inlet of the gas-liquid separator 4, and the liquid outlet of the gas-liquid separator 4 is connected with the first The throttle valve 7 is connected, the outlet of the first throttle valve 7, the outlet of the low-temperature fluid of the regenerator 6, and the inlet of the low-temperature fluid of the evaporator-condenser 5 are connected to each other and there is a node, and the evaporator-condenser 5 is low-temperature The outlet of the fluid is connected to the compressor 1, the inlet of the low-temperature fluid of the regenerator 6 is connected to the outlet of the evaporator 8, the inlet of the evaporator 8 is connected to the outlet of the second throttle valve 9, and the second throttle valve 9 The inlet of the regenerator 6 is connected to the outlet of the high-temperature fluid of the regenerator 6, the inlet of the regenerator 6 is connected to the outlet of the high-temperature fluid of the evaporator-condenser 5, and the inlet of the evaporator-condenser 5 high-temperature fluid is connected to the gas-liquid separator 4 The air outlet is connected to form a closed channel for refrigerant self-cascade heat pump circulation; the compressor 1 is also connected to the first motor 23; the condenser 2 is installed in the water storage tank 3, and the temperature sensor at the outlet of the water storage tank 3 12 is connected to the first controller 19, and the first controller 19 is connected to the first motor 23 to control the start and stop of the heat pump system; the second temperature sensor 13 and the third temperature sensor 14 are connected to the second The controller 20 is respectively located at the outlet of the low-temperature fluid of the evaporator-condenser 5 and the outlet of the first throttle valve 7, and the second controller 20 is connected with the first throttle valve 7 to adjust the first The opening degree of the throttle valve 7; the fourth temperature sensor 15, the fifth temperature sensor 16 are connected to the third controller 21, which are respectively at the outlet and the inlet of the evaporator 8, and the third controller 21 It is connected with the second throttle valve 9 to adjust the opening degree of the second throttle valve 9; the sixth temperature sensor 17 and the seventh temperature sensor 18 are connected to the fourth controller 22, which are respectively located in the evaporator 8 At the middle position of the left and right sides, the fourth controller 22 is also connected with the defrosting heater 11 and the second motor 24 to control the start and stop of the defrosting heater 11; the fan 10 is connected with the second motor 24 The motor 24 is connected, and the fan 10 is directly opposite to the defrosting heater 11, which is used to enhance the convective heat transfer on the air side of the evaporator 8;

Water storage tank 3 adopts thermal insulation material insulation, and air pressure balance pipe is equipped with on the top.

The connection between the various parts of the closed channel of the refrigerant self-cascading heat pump cycle is connected by refrigerant pipelines, and the tubes are wrapped with thermal insulation and waterproof materials.

After the mixed working fluid is compressed by the compressor 1, it forms a high-temperature and high-pressure mixed gas, and passes through the condenser 2 to heat the hot water to the target temperature. At this time, most of the high-boiling and a small amount of low-boiling working fluids are condensed into liquids and passed through the vapor-liquid separator 4; The lower-temperature working fluid throttled by the two throttling valves 9 is condensed into a liquid after secondary cooling, and then passes through the regenerator 6, and the refrigerant liquid is further passed through by the low-temperature refrigerant vapor from the evaporator 8. The supercooled liquid is cooled to form a supercooled liquid, and the supercooled liquid is throttled by the second throttle valve 9 to form a low-temperature and low-pressure gas-liquid mixture. The gas-liquid mixture absorbs the heat of the air through the evaporator 8, evaporates and becomes a gas, and then heat 6, mixed with the working fluid from the first throttling valve 7 and enters the evaporator-condenser 5. The liquid separated from the gas-liquid separator 4 passes through the first throttle valve 7, lowers the temperature and pressure, and then mixes with the working fluid from the regenerator 6, and absorbs most of the low boiling point and a small amount of high boiling point through the evaporator-condenser 5. After the heat released by the condensation of the working medium at the boiling point, it evaporates into a gas, and then is compressed into a high-pressure and high-temperature gas by the compressor 1 to complete a cycle.

The utility model utilizes the self-cascading air source heat pump circulation to realize a high compression ratio and a large temperature difference working environment, and can still provide hot water at 65°C normally when the ambient air temperature is lower than 0°C, which improves the system structure and enables It has the advantages of simple structure, cheap price, convenient installation and operation, etc., and is convenient for popularization and application.

Claims (4)

1. self-folding type air source heat pump water heater, it is characterized in that, comprise compressor, condenser, storage tank, gas-liquid separator, evaporation-condenser, regenerator, evaporimeter, fan, Defrost heater, two choke valves, seven temperature sensors, four controllers and two motor, the exhaust outlet of described compressor is connected with the air inlet of condenser, the outlet of condenser is connected with the import of gas-liquid separator, the liquid outlet of gas-liquid separator is connected with first choke valve, the outlet of first choke valve, the outlet of the cryogen of regenerator, interconnect between the import of evaporation-condenser cryogen and a node arranged, the outlet of evaporation-condenser cryogen is connected with compressor, the import of the cryogen of regenerator is connected with the outlet of evaporimeter, the import of evaporimeter is connected with the outlet of second choke valve, the import of second choke valve is connected with the outlet of the high temperature fluid of regenerator, the import of the high temperature fluid of regenerator is connected with the outlet of evaporation-condenser high temperature fluid, the import of evaporation-condenser high temperature fluid is connected with the gas outlet of gas-liquid separator, forms the close passage of cold-producing medium self-folding type heat pump cycle; Compressor also links to each other with first motor; Condenser is in the storage tank, and the temperature sensor of storage tank delivery port is connected to first controller, and first controller links to each other with first motor; Second and third temperature sensor is connected to second controller, is in the evaporation-outlet of condenser cryogen and the exit of first choke valve respectively, and described second controller links to each other with first choke valve, to regulate the aperture of first choke valve; Fourth, fifth temperature sensor is connected to the 3rd controller, is in the export and import place of evaporimeter respectively, and described the 3rd controller links to each other with second choke valve, to regulate the aperture of second choke valve; Six, seven temperature sensors are connected to the 4th controller, are in the place, centre position of the evaporimeter left and right sides respectively, and described the 4th controller also links to each other with Defrost heater, second motor; Described fan links to each other with second motor.

2. self-folding type air source heat pump water heater according to claim 1 is characterized in that, the connection between each parts of the close passage of described cold-producing medium self-folding type heat pump cycle adopts pipeline to connect, pipe outer wrapping thermal-insulating waterproof material.

3. self-folding type air source heat pump water heater according to claim 1 is characterized in that, described fan is in Defrost heater right opposite place, is used for strengthening evaporator air side heat convection.

4. self-folding type air source heat pump water heater according to claim 1 is characterized in that barometric pipe is equipped with at the top of described storage tank.

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