CN215675945U

CN215675945U - Composite heat exchanger

Info

Publication number: CN215675945U
Application number: CN202122230400.XU
Authority: CN
Inventors: 刘方然; 夏肖丰
Original assignee: Yantai Ruijia Energy Saving Technology Co ltd
Current assignee: Yantai Ruijia Energy Saving Technology Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-01-28
Anticipated expiration: 2031-09-15

Abstract

The utility model relates to a composite heat exchanger, in particular to a composite heat exchanger of a water vapor generator and a water vapor evaporator, which belongs to the technical field of heat exchangers and comprises a fan, the water vapor evaporator, the water vapor generator and a water supply system which are sequentially arranged from left to right at intervals; the water vapor evaporator is of a square structure with pipe plates at the left end and the right end and frames at the upper end and the lower end, the water vapor generator is of a square structure with frames at the periphery, and a static pressure box for air flowing is formed between the air outlet side of the water vapor generator and the air inlet side of the water vapor evaporator; one end of the water supply system is connected with the bottom of the water vapor generator, and the other end of the water supply system is opposite to the top of the water vapor generator. According to the composite heat exchanger, the wet bulb temperature of the ambient atmosphere is used as the air inlet temperature of the cooling medium of the condenser, so that the function of the air-cooled condenser can be ensured, the energy consumption of a vapor compression refrigeration system is reduced, and the market use requirements are met.

Description

Composite heat exchanger

Technical Field

The utility model relates to a composite heat exchanger adopting an evaporative cooling technology, in particular to a composite heat exchanger of a water vapor generator and a water vapor evaporator, and belongs to the technical field of heat exchangers.

Background

The air-cooled condenser forms a complete cooling system, so that the manufacturing cost is low, and the practical application is very wide, but the traditional air-cooled condenser utilizes the ambient air dry bulb temperature as the inlet temperature of a cooling medium, so that the condensation temperature of the air-cooled condenser is high, particularly the ambient air dry bulb temperature is greatly influenced by solar radiation heat, and in the season from late spring to early autumn, the solar radiation heat greatly influences the ambient air dry bulb temperature, so that the air-cooled condenser is extremely unstable in working in the season, the inlet air temperature is improved, and the heat exchange efficiency is directly seriously attenuated; the improvement of the condensation temperature, especially for the refrigeration system applying the vapor compression principle of the air-cooled condenser and the refrigeration system in the field of air conditioners, directly leads to the increase of the energy consumption of the compressor, and the service life of the compressor is shortened due to the severe operating conditions of the compressor.

The temperature of the ambient atmosphere is divided into dry bulb temperature and wet bulb temperature, generally speaking, the wet bulb temperature of the ambient atmosphere is 7-8 ℃ lower than the dry bulb temperature, the dry bulb temperature is higher when solar radiation is serious, and the improvement range of the wet bulb temperature is extremely small, so that if a heat exchanger can be invented, the function of an air-cooled condenser can be ensured by using the wet bulb temperature of the ambient atmosphere as the air inlet temperature of a cooling medium of the condenser, the working stability of the condenser can be effectively maintained, and the condensation temperature of the traditional air-cooled condenser can be greatly reduced, so that the heat exchanger has very important significance for reducing the energy consumption of a vapor compression type refrigeration system and relieving the rising speed of the ambient temperature.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: in order to overcome the defects in the prior art, the composite heat exchanger of the water vapor generator and the water vapor evaporator is provided.

The technical scheme for solving the technical problems is as follows:

a composite heat exchanger comprises a fan, a water vapor evaporator, a water vapor generator and a water supply system which are sequentially arranged from left to right at intervals; the water vapor evaporator is of a square structure with pipe plates at the left end and the right end and frames at the upper end and the lower end, the water vapor generator is of a square structure with frames at the periphery, and a static pressure box for air flowing is formed between the air outlet side of the water vapor generator and the air inlet side of the water vapor evaporator; one end of the water supply system is connected with the bottom of the water vapor generator, and the other end of the water supply system is opposite to the top of the water vapor generator.

Furthermore, the water supply system comprises a water collecting tank, a circulating water tank, a water pump and a water distributor which are sequentially communicated through pipelines; the water collecting tank is arranged at the bottom of the water vapor generator and is integrated with the bottom frame of the water vapor generator, and the water distributor is positioned above the water vapor generator and extends into the top frame of the water vapor generator to be opposite to the water distributor; the circulating water tank is provided with a water supplementing device and an overflow pipe.

Furthermore, the water vapor evaporator is a finned heat exchanger, and the finned heat exchanger is provided with an air inlet pipe and a liquid outlet pipe.

Further, the water vapor generator is made of high-strength honeycomb paper resistant to water immersion.

Furthermore, a water baffle is arranged between the water vapor evaporator and the water vapor generator, and the bottom of the water baffle is communicated with the water collecting tank.

Compared with the prior art, the utility model has the beneficial effects that: the composite heat exchanger provided with the water vapor generator and the water vapor evaporator reduces the air inlet temperature of the water vapor evaporator from the dry bulb temperature to the wet bulb temperature, can greatly reduce the condensation temperature of a refrigerant of the water vapor evaporator, and is similar to saturated humid air at the wet bulb temperature, so that the water vapor evaporator performs real heat and humidity exchange in the working process, and the working efficiency of the water vapor evaporator can be greatly improved; the function of the air-cooled condenser can be ensured by using the wet bulb temperature of the ambient atmosphere as the air inlet temperature of the cooling medium of the condenser, the working stability of the condenser is effectively maintained, the energy consumption of the vapor compression refrigeration system is reduced, and the rising speed of the ambient temperature is relieved; the novel heat exchanger can effectively solve the problem that the heat exchange capacity of the existing air cooler is seriously influenced by the heat of solar radiation, so that the heat exchange capacity is effectively ensured, and the use requirement of the heat exchanger in the current market is met.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

In the figure, 1, a fan; 2. a water vapor evaporator; 3. a water vapor generator; 4. a static pressure box; 501. a water collection tank; 502. a circulating water tank; 503. a water pump; 504. a water distributor; 6. a pipeline; 7. an overflow pipe; 8. a water baffle; 9. an air inlet pipe; 10. a liquid outlet pipe.

Detailed Description

The principles and features of the present invention are described below in conjunction with fig. 1 and 2, which are provided by way of example only to illustrate the present invention and not to limit the scope of the present invention.

Example 1

A composite heat exchanger comprises a fan 1, a water vapor evaporator 2, a water vapor generator 3 and a water supply system which are sequentially arranged from left to right at intervals; the water vapor evaporator 2 is of a square structure with tube plates at the left end and the right end and frames at the upper end and the lower end, the water vapor generator 3 is of a square structure with frames at the periphery, and a static pressure box 4 for air flowing is formed between the air outlet side of the water vapor generator 3 and the air inlet side of the water vapor evaporator 2; one end of the water supply system is connected with the bottom of the water vapor generator 3, and the other end of the water supply system is opposite to the top of the water vapor generator 3.

The water supply system comprises a water collecting tank 501, a circulating water tank 502, a water pump 503 and a water distributor 504 which are sequentially communicated through a pipeline 6; the water collecting tank 501 is arranged at the bottom of the water vapor generator 3 and is integrated with the bottom frame of the water vapor generator 3, and the water distributor 504 is positioned above the water vapor generator 3 and extends into the top frame of the water vapor generator 3 to be opposite to the water vapor generator 3; the circulating water tank 502 is provided with a water supplementing device and an overflow pipe 7; the water pump 503 adopts a submersible pump and is directly arranged in the circulating water tank 502, so that the pipeline of a water supply system can be simplified, and the investment cost is reduced.

The water vapor evaporator 2 is a finned heat exchanger, and the finned heat exchanger is provided with an air inlet pipe 9 and a liquid outlet pipe 10; the finned heat exchanger is beneficial to reducing the volume of the water vapor evaporator 2 and improving the heat exchange effect.

The steam generator 3 is made of high-strength honeycomb paper resistant to water immersion.

The vapor compression refrigeration system adopts the working principles of vapor generation, evaporative cooling and condensation heat exchange:

when the ambient dry bulb temperature is 35 ℃ and the relative humidity is 60%, the wet bulb temperature is 28.1 ℃ and the moisture content is 21.5 g/Kg. As mentioned above, the high pressure superheated refrigerant gas discharged from the compressor enters the inside of the water vapor evaporator 2 through the air inlet pipe 9 of the water vapor evaporator 2, when the composite heat exchanger works, the water in the circulating water tank 502 is uniformly sprayed on the water-proof high-strength honeycomb pore paper of the water vapor generator 3 through the water distributor 504 under the action of the water pump 503, at this time, the water-proof high-strength honeycomb pore paper of the water vapor generator 3 is wetted by the water, the unsaturated humid air with the ambient dry bulb temperature of 35 ℃ and the relative humidity of 60% is sucked in through the fan 1, and passes through the water vapor generator 3, at this time, the unsaturated humid air in the environment generates heat and moisture exchange with the water-proof water vapor generator 3, the water on the surface of the water-proof high-strength honeycomb pore paper of the water vapor generator 3 is evaporated into water vapor, and becomes approximately saturated water vapor with the static pressure of particulate water drops and enters the tank 4, because the ventilation section area of the static pressure box 4 is larger and has enough space, the particle water drops continue to carry out heat and moisture exchange with dry air similar to saturated humid air, the temperature of the particle water drops is equal to the wet bulb temperature of 28.1 ℃ of the ambient atmosphere, then the particle water drops enter the water vapor evaporator 2, the water vapor at the wet bulb temperature of 28.1 ℃ absorbs the heat of high-pressure superheated refrigerant gas in the water vapor, the high-pressure superheated refrigerant gas is evaporated into unsaturated humid air, and the high-pressure superheated refrigerant gas is condensed into high-pressure refrigerant liquid. It can be seen that compared with the conventional air-cooled condenser, the combined heat exchanger has the advantage that the reduction of the temperature of the inlet air by 6.9 ℃ means that the condensation temperature of the refrigerant gas condensed into liquid is reduced by at least 6.9 ℃, and in fact, the combined heat exchanger actually approximates the evaporation process of saturated water vapor in the heat exchange process of the water vapor evaporator 2, so that the reduction range of the condensation temperature in the actual operation process is larger than 6.9 ℃.

The season from late summer to early autumn is the most severe solar radiation heat, and under the condition of the sun: when the environmental temperature is 35 ℃ and the relative humidity is 60%, the temperature of the ground, the roof and the wall is above 60 ℃ due to the influence of solar radiant heat, the temperature of the roof, the ground and the wall is increased due to the solar radiant heat, and the moisture content in the air is still maintained to be 2.15 g/Kg. As the micro household air conditioner is usually arranged on a split air conditioner such as a multi-split air conditioner and the like which are 200mm away from a wall body and arranged on a roof and the ground, the distance between a heat exchanger and the roof and the ground, namely the distance between an air inlet of the heat exchanger of an air conditioning unit and the ground, is basically 300mm, even if the height between a condenser of a large refrigerating air conditioning unit and the ground is only about 800mm, under the condition, the air inlet dry bulb temperature of the air conditioner is at least 45 ℃, at the moment, the wet bulb temperature of ambient air is only 30.2 ℃, therefore, if the traditional air-cooled condenser is adopted, the condensing temperature is improved by at least 10 ℃, the unit refrigerating capacity of a compressor is reduced by 1.5-2% according to the increase of the condensing temperature by 1 ℃, the energy consumption of the unit refrigerating capacity of the compressor is increased by 2.5-3.5%, the refrigerating capacity of the vapor compression type refrigerating system and the air-conditioning refrigerating system adopting the air-cooled condenser is attenuated by 15-20%, the power consumption of the compressor per unit refrigerating capacity is increased by 25-35%, and the refrigerating capacity of the vapor compression type refrigerating system and the air-conditioning refrigerating system adopting the composite heat exchanger is only attenuated by 3-4%, and the energy consumption per unit refrigerating capacity is only increased by 5-7%, so that the energy consumption of the refrigerating system adopting the composite heat exchanger is increased by at least 20% compared with that of the traditional air-cooled refrigerating system and the air-conditioning refrigerating system.

Example 2

Unlike embodiment 1, in embodiment 2, a water baffle 8 is disposed between the water vapor evaporator 2 and the water vapor generator 3, and the bottom of the water baffle 8 is communicated with the water collecting tank 501. When the air volume of the fan 1 is larger, the air speed passing through the water vapor generator 3 is larger than 2.5m/s, and in order to avoid water drops being carried away by the air, the water baffle plate 8 is arranged, so that water vapor at the temperature of a wet bulb leaving the water vapor generator 3 is separated from the water drops through the water baffle plate 8 and flows back to the water collecting tank 501 at the bottom of the water vapor generator 3, and the waste of water resources is avoided.

According to the composite heat exchanger, the wet bulb temperature of the ambient atmosphere is used as the air inlet temperature of the cooling medium of the condenser, so that the function of the air-cooled condenser can be ensured, the working stability of the condenser is effectively maintained, the energy consumption of a vapor compression refrigeration system is reduced, and the rising speed of the ambient temperature is relieved; the problem that the heat exchange capacity of the existing air cooler is seriously influenced by the heat of solar radiation can be effectively solved, so that the heat exchange capacity is effectively guaranteed, and the use requirement of the heat exchanger in the current market is met.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A compound heat exchanger which is characterized in that: comprises a fan (1), a water vapor evaporator (2), a water vapor generator (3) and a water supply system which are arranged from left to right at intervals in sequence; the water vapor evaporator (2) is of a square structure with pipe plates at the left end and the right end and frames at the upper end and the lower end, the water vapor generator (3) is of a square structure with frames at the periphery, and a static pressure box (4) for air flow is formed between the air outlet side of the water vapor generator (3) and the air inlet side of the water vapor evaporator (2); one end of the water supply system is connected with the bottom of the water vapor generator (3), and the other end of the water supply system is opposite to the top of the water vapor generator (3).

2. A composite heat exchanger according to claim 1, wherein: the water supply system comprises a water collecting tank (501), a circulating water tank (502), a water pump (503) and a water distributor (504) which are sequentially communicated through a pipeline (6); the water collecting tank (501) is arranged at the bottom of the water vapor generator (3) and is integrated with the bottom frame of the water vapor generator (3), and the water distributor (504) is positioned above the water vapor generator (3) and extends into the top frame of the water vapor generator (3) to be opposite to the water vapor generator; the circulating water tank (502) is provided with a water supplementing device and an overflow pipe (7).

3. A composite heat exchanger according to claim 1, wherein: the water vapor evaporator (2) is a finned heat exchanger, and the finned heat exchanger is provided with an air inlet pipe (9) and a liquid outlet pipe (10).

4. A composite heat exchanger according to claim 1, wherein: the water vapor generator (3) is made of high-strength honeycomb-hole paper resistant to water immersion.

5. A composite heat exchanger according to claim 1, wherein: a water baffle (8) is arranged between the water vapor evaporator (2) and the water vapor generator (3), and the bottom of the water baffle (8) is communicated with the water collecting tank (501).