CN211451777U

CN211451777U - Drying and dehumidifying heat pump unit with supercooling and precooling adjustment

Info

Publication number: CN211451777U
Application number: CN201921822647.7U
Authority: CN
Inventors: 刘晓明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-09-08
Anticipated expiration: 2029-10-28

Abstract

The utility model discloses a drying and dehumidifying heat pump unit with supercooling and precooling adjustment, which comprises a refrigeration working medium internal circulation system and an air flow circulation system, wherein the refrigeration working medium circularly flows in a circulation path, the refrigeration working medium releases heat and condenses in a condenser, and the refrigeration working medium absorbs heat and evaporates in an evaporator; the drying and dehumidifying heat pump unit comprises an air supply outlet, an air return inlet, an air return cavity, an evaporation cavity and an air supply cavity, and forms the airflow circulating system. The utility model uses the air source to transfer the heat in the air in the baking room with low temperature and low humidity into the high temperature and low humidity hot air in the high temperature environment, which is environment-friendly, safe, pollution-free, energy-saving, cost-saving, and the conversion efficiency of the electric heating energy in the heating process can reach more than 450 percent; the rear end of the condenser is connected with a water cooler, the low condensation temperature can be kept in a high-temperature drying environment, and the unit refrigerating system can have a larger supercooling degree through a cooling tower cooling mode with low ring temperature.

Description

Drying and dehumidifying heat pump unit with supercooling and precooling adjustment

Technical Field

The utility model relates to a heat pump field especially relates to a take stoving dehumidification heat pump set of subcooling and precooling regulation.

Background

With the continuous improvement of living standard, people have higher and higher living demands, and drying equipment for general industries, agricultural products and the like are more and more widely applied.

The existing drying equipment mainly adopts coal, a boiler, electricity and the like as heating sources, the traditional drying equipment can be restricted by the government along with the improvement of air requirements at present, and the novel drying and dehumidifying heat pump unit with supercooling and precooling regulation can be widely accepted and applied.

The coal is used as a heat source, and has the following disadvantages: (1) coal is used as a non-renewable energy source, rapid exhaustion of the coal is caused by endless mining and consumption, the use of petrochemical energy sources such as coal is a main source for increasing greenhouse gas such as CO2, and harmful substances such as SO2 generated by coal combustion seriously pollute the atmospheric environment and influence the body health of people; (2) the conventional drying equipment generates heat due to the fact that open fire is adopted to burn in the furnace, toxic CO gas can be generated when fire coal is not sufficiently burnt, meanwhile, some manufacturers can produce some inferior industrial furnaces due to market competition, and further cracking of a furnace body due to overhigh temperature or fire disasters due to out-of-control of a temperature controller can be generated; (3) the baking temperature is high, the stability is poor, the quality of the dried articles is difficult to be improved to be good, and the product quality is low; (4) when the water content of the dried articles is high, the drying cost is too high, and the economical practicability is not good.

The electric power is adopted as a heating source, so that the whole electric load of the baking room is too large and the cost is too high when the industrial and agricultural products are baked, the application is not popularized, and the economic practicability is not good.

The boiler is used as a heat source, a large amount of water is needed, and a power supply or coal is needed, so that the cost is high, and the pollution is heavy.

In addition, the existing traditional drying equipment is not provided with a heat pump energy-saving and environment-friendly technology, and the drying energy-saving effect needs to be improved.

Disclosure of Invention

In view of the above problem, the utility model provides a drying and dehumidifying heat pump unit that area supercooling and precooling were adjusted has the sensible heat recovery function, and water condenser supercooling technique and water coil pipe heat exchanger precooling technique are energy-concerving and environment-protective, and economic practicality is strong. The utility model adopts the technical proposal that:

a drying and dehumidifying heat pump unit with supercooling and precooling adjustment comprises a refrigerating working medium internal circulation system and an air flow circulation system, wherein the refrigerating working medium internal circulation system comprises a driving device, a condenser, a separator and an evaporator, the driving device, the condenser, the separator and the evaporator are sequentially connected to form a circulation passage, the driving device drives a refrigerating working medium to circularly flow in the circulation passage, the refrigerating working medium releases heat and condenses in the condenser, and the refrigerating working medium absorbs heat and evaporates in the evaporator; the drying and dehumidifying heat pump unit comprises a gas supply cavity, a return air cavity, an evaporation cavity and an electric control cavity, wherein the gas supply cavity, the return air cavity and the evaporation cavity are connected through a connector, the connector comprises a first channel and a second channel, the return air cavity and the evaporation cavity are connected through the first channel, and the gas supply cavity and the evaporation cavity are connected through the second channel; the air supply cavity is provided with an air supply outlet, an air supply device and the condenser are arranged in the air supply cavity, the air return cavity is provided with an air return inlet, the evaporator is arranged in the evaporation cavity, and the air supply outlet, the air return inlet, the air return cavity, the evaporation cavity and the air supply cavity form the air flow circulation system.

As a further explanation of the present invention, a supercooling processor is provided between the condenser and the separator for supercooling the refrigerant outputted from the condenser.

Still further, the subcooling processor is a water condenser.

Furthermore, the connector is a sensible heat recoverer and is used for preheating the airflow conveyed into the air supply cavity by the evaporation cavity.

Further, the driving device is a compressor, the compressor comprises a high-pressure outlet and a low-pressure inlet, the high-pressure outlet is connected to the condenser and is provided with a high-pressure switch; the low pressure inlet is connected to the separator and is provided with a low pressure switch.

Furthermore, a drying filter and a throttle valve are arranged between the separator and the evaporator.

Furthermore, a heat exchanger is arranged at the evaporator and used for reducing the dew point temperature of air at the evaporator and increasing the relative humidity.

Furthermore, the heat exchanger is a water coil heat exchanger, and the water coil heat exchanger is tightly connected with the evaporator.

Further, the throttle valve is a thermal expansion valve or an electronic expansion valve.

Further, the water condenser is a high efficiency shell and tube heat exchanger.

The utility model has the advantages that: (1) the air source is used for driving only a small amount of electric quantity, and heat in air in the low-temperature and low-humidity baking room is directly transferred to high-temperature and low-humidity hot air in a high-temperature environment, so that the environment-friendly and safe baking room is environment-friendly and free of pollution, saves energy and saves cost; (2) the low-temperature and low-humidity return air passes through the sensible heat recoverer to reduce the dew point temperature of the wet air, passes through the water coil heat exchanger to greatly reduce the dew point temperature again, and passes through the evaporator after the relative humidity is improved, so that the water removal amount of the evaporator can be improved to the maximum extent, the water content of the air is greatly reduced, the latent heat of the low-temperature and low-humidity air in the condenser is reduced, the sensible heat of the air is greatly improved, the temperature rise of the low-humidity air is higher, the low-temperature and low-humidity air is changed into high-temperature and low-humidity dry air, the moisture in the; (3) the rear end of the condenser is connected with a water cooler, the water temperature of the cooling tower is used for controlling the unit to keep low condensation temperature in a high-temperature drying environment, and even the unit refrigerating system has higher supercooling degree in a low-ring-temperature cooling tower cooling mode at the high-temperature drying temperature, so that the unit can reach lower evaporation temperature. Therefore, more water can be removed in a high-temperature drying environment, and the operation condition of the unit is relatively stable; (4) the dehumidification drying equipment of the utility model is provided with the water coil heat exchanger, so that the relative humidity of the return air is improved, the dry bulb temperature of the return air is reduced, and more water is removed; (5) the throttle valve is a thermal expansion valve or an electronic expansion valve, so that the performance is stable, and the flow control is accurate; (6) be equipped with reservoir and filter between heat exchanger and the choke valve in proper order, be equipped with vapour and liquid separator between heat sink and the compressor, make the utility model discloses dehumidification stoving drying equipment thermostatic control is more stable, more accurate.

Drawings

FIG. 1 is a schematic view of the air circulation system of the present invention;

fig. 2 is a schematic diagram of the refrigerating medium internal circulation system of the present invention.

Reference numerals: the system comprises a compressor 1, a high-pressure switch 2, a condenser 3, a water condenser 4, a low-pressure switch 5, a separator 6, an evaporator 7, a drying filter 8, a throttle valve 9, a water coil heat exchanger 10, a blower 11, a sensible heat recoverer 12, an air supply outlet 13 and an air return inlet 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, the drying and dehumidifying heat pump unit with supercooling and precooling adjustment of the present invention includes a refrigerant internal circulation system and an air flow circulation system, the refrigerant internal circulation system includes a driving device, a condenser 3, a separator 6 and an evaporator 7, the driving device, the condenser 3, the separator 6 and the evaporator 7 are connected in sequence to form a circulation path, the driving device drives the refrigerant to flow in the circulation path, the refrigerant releases heat and condenses in the condenser 3, and the refrigerant evaporates in the evaporator 7 in a heat absorption manner; the drying and dehumidifying heat pump unit comprises a gas supply cavity, a return air cavity, an evaporation cavity and an electric control cavity, wherein the gas supply cavity, the return air cavity and the evaporation cavity are connected through a connector, the connector comprises a first channel and a second channel, the return air cavity and the evaporation cavity are connected through the first channel, and the gas supply cavity and the evaporation cavity are connected through the second channel; the air supply cavity is provided with an air supply outlet and is internally provided with an air supply device and the condenser 3, the air return cavity is provided with an air return inlet, the evaporator 7 is arranged in the evaporation cavity, and the air supply outlet, the air return inlet, the air return cavity, the evaporation cavity and the air supply cavity form the airflow circulating system; a supercooling processor is arranged between the condenser 3 and the separator 6 and used for supercooling the refrigerating working medium output by the condenser 3; the supercooling processor is a water condenser 4; the connector is a sensible heat recoverer 12 and is used for preheating airflow conveyed into the air supply cavity by the evaporation cavity; the driving device is a compressor 1, the compressor 1 comprises a high-pressure outlet and a low-pressure inlet, the high-pressure outlet is connected to the condenser 3 and is provided with a high-pressure switch 2; the low pressure inlet is connected to the separator 6 and is provided with a low pressure switch 5; a drying filter 8 and a throttle valve 9 are arranged between the separator 6 and the evaporator 7; the evaporator 7 is provided with a heat exchanger for reducing the dew point temperature of air at the evaporator 7 and improving the relative humidity; the heat exchanger is a water coil heat exchanger 10, and the water coil heat exchanger 10 is tightly connected with the evaporator 7; the throttle valve 9 is a thermal expansion valve or an electronic expansion valve; the water condenser 4 is a high-efficiency shell-and-tube heat exchanger; the compressor 1 and the blower 11 are both connected with an external power supply and driven by electric energy.

Referring to the attached drawing 1, low-temperature air enters a return air cavity from a return air inlet 14 under the action of a blower 11 and flows to an evaporation cavity through a first channel of a sensible heat recoverer 12, when the low-temperature air flows through an evaporator 7 in the evaporation cavity, the temperature of the low-temperature air is further reduced due to the evaporation heat absorption effect of a refrigeration working medium in the evaporator 7, the low-temperature air flows to a delivery air cavity through a second channel of the sensible heat recoverer 12 after flowing through the evaporator 7, heat exchange is carried out in the sensible heat recoverer 12 to preheat the low-temperature air, the preheated air enters a delivery air cavity and flows through a condenser 3, the air absorbs heat to be changed into high-temperature dry gas under the condensation heat release effect of the refrigeration working medium in the condenser 3, and the high-temperature dry gas is delivered to a drying chamber under the. In this embodiment, the air return opening 14 is provided with a filter screen for filtering the passing air to remove large-particle impurities.

Referring to the attached fig. 2, the structure and principle of the refrigerant internal circulation system of the present embodiment are as follows: the refrigerant working medium compresses the low-temperature and low-pressure gas separated by the separator 6 into high-temperature and high-pressure refrigerant working medium gas under the action of the piston of the compressor 1; the high-temperature high-pressure refrigerant gas is cooled into liquid after entering the condenser 3, so that a large amount of heat is emitted, and the cold air outside the condenser 3 absorbs the heat of the refrigerant gas, so that the temperature of the cold air continuously rises and becomes high-temperature hot air which is sent out from the air supply outlet; after a refrigerant working medium is cooled by a condenser 3, the refrigerant working medium sequentially passes through a filter 8 and a throttle valve 9 after being cooled by a water condenser 4, then is evaporated in an evaporator 7, the refrigerant working medium absorbs heat in the environment to be evaporated, is separated into low-temperature and low-pressure gas by a separator 6 again, and finally enters a compressor 1, the cycle is repeated in such a way, the refrigerant working medium absorbs heat of external air in the evaporator 7, and the heat is released from the condenser 3 under the mechanical action of the compressor 1 and is converted into heat of hot air; the whole heat pump unit applies the inverse Carnot cycle principle, the heat pump does work to enable the heat medium (refrigerant) to generate physical phase change (liquid state-gas state-liquid state), the heat absorption device (evaporator 7) absorbs the heat in the low-temperature heat source air by utilizing the characteristics of uninterrupted heat absorption and heat release in the reciprocating cycle phase change process, and the special heat exchanger (condenser 3) releases heat to the cold air continuously to enable the cold air to be heated to the high-temperature hot air gradually; the highest electric heat energy conversion efficiency in the heating process can reach more than 450 percent, and the heat pump only needs to consume a small part of electric energy to meet the requirement of equipment such as the compressor 1, the blower 11 and the like to do work, so that the heat in the air in the low-temperature environment can be transferred to the hot air in the high-temperature environment, and the hot air in the room can be heated to prepare the high-temperature hot air in the room. A sensible heat recoverer 12 is arranged in the heat pump unit, the equipment carries out sensible heat exchange preheating through return air of a first channel of a return air inlet and cold air of a second channel after dehumidification through an evaporator 7, a heat source is fully utilized, and the working efficiency is improved.

Referring to fig. 1, when the heat pump unit needs to dehumidify, the external fan outside the baking room is turned on to achieve the function of dehumidifying, and meanwhile, the temperature of the dry bulb in the baking room is maintained. Sensible heat recoverer 12 of heat pump set interior establishes changes the humid air of low temperature and high humidity into the humid air of high temperature and high humidity to the high temperature and high humidity of indoor return air heat exchange, reduce the dew point temperature of return air, the indoor humid air of low temperature and high humidity can make the air reduce the dry bulb temperature after water coil heat exchanger 10 earlier, improve the relative humidity of air, later through evaporimeter 7 moisture that can detach more humid air once more, become the low wet dry air of low temperature through evaporimeter 7 dehumidification, the dry air of dry low temperature and low humidity absorbs the heat that the humid air of high temperature and high humidity of return air discharged through sensible heat recoverer 12, play the best effect that the cold air preheats, reach quick dehumidification and more energy-conserving effect. The heat pump main machine is internally provided with a water condenser 4, and the water condenser is used for exchanging heat with the outside air through a cooling tower, so that the unit works under a stable supercooling degree, the unit is reliable in operation, the supercooling degree of the main machine can be increased, the unit reaches a lower evaporation temperature, and more water can be removed from the unit. The heat pump host is internally provided with a water coil heat exchanger 10, and heat exchange is also carried out between the cooling tower and the outside air, so that the relative humidity of the humid air is improved by the humid hot air passing through the water coil heat exchanger 10, the dry bulb temperature of the high-temperature humid air is reduced, more moisture is removed after the humid hot air passes through the evaporator 7 again, and the excellent dehumidification effect is achieved.

The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for variations, and in short, all variations within the scope of the independent claims of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a take subcooling and drying dehumidification heat pump set that precooling was adjusted which characterized in that: the refrigerating working medium internal circulation system comprises a refrigerating working medium internal circulation system and an air flow circulation system, wherein the refrigerating working medium internal circulation system comprises a driving device, a condenser (3), a separator (6) and an evaporator (7), the driving device, the condenser (3), the separator (6) and the evaporator (7) are sequentially connected to form a circulation passage, the driving device drives a refrigerating working medium to circularly flow in the circulation passage, the refrigerating working medium releases heat and is condensed in the condenser (3), and the refrigerating working medium is subjected to heat absorption and evaporation in the evaporator (7); the drying and dehumidifying heat pump unit comprises a gas supply cavity, a return air cavity, an evaporation cavity and an electric control cavity, wherein the gas supply cavity, the return air cavity and the evaporation cavity are connected through a connector, the connector comprises a first channel and a second channel, the return air cavity and the evaporation cavity are connected through the first channel, and the gas supply cavity and the evaporation cavity are connected through the second channel; the air supply cavity is provided with an air supply outlet, an air supply device and the condenser (3) are arranged in the air supply cavity, the air return cavity is provided with an air return inlet, the evaporator (7) is arranged in the evaporation cavity, and the air supply outlet, the air return inlet, the air return cavity, the evaporation cavity and the air supply cavity form the airflow circulating system.

2. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 1, wherein: and a supercooling processor is arranged between the condenser (3) and the separator (6) and used for performing supercooling treatment on the refrigeration working medium output by the condenser (3).

3. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 2, wherein: the supercooling processor is a water condenser (4).

4. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 1, wherein: the connector is a sensible heat recoverer (12) and is used for preheating airflow conveyed into the air supply cavity by the evaporation cavity.

5. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 1, wherein: the driving device is a compressor (1), the compressor (1) comprises a high-pressure outlet and a low-pressure inlet, the high-pressure outlet is connected to the condenser (3) and is provided with a high-pressure switch (2); the low pressure inlet is connected to the separator (6) and is provided with a low pressure switch (5).

6. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 1, wherein: a drying filter (8) and a throttle valve (9) are arranged between the separator (6) and the evaporator (7).

7. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 1, wherein: the evaporator (7) is provided with a heat exchanger for reducing the dew point temperature of air at the evaporator (7) and improving the relative humidity.

8. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 7, wherein: the heat exchanger is a water coil heat exchanger (10), and the water coil heat exchanger (10) is tightly connected with the evaporator (7).

9. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 6, wherein: the throttle valve (9) is a thermal expansion valve or an electronic expansion valve.

10. The drying and dehumidifying heat pump unit with supercooling and precooling regulation according to claim 3, wherein: the water condenser (4) is a high-efficiency shell-and-tube heat exchanger.