CN214665359U

CN214665359U - Transcritical CO2Efficient gas heat exchanger for heat pump system

Info

Publication number: CN214665359U
Application number: CN202120447061.8U
Authority: CN
Inventors: 陶然; 邹志胜; 李培遥
Original assignee: Ningbo Meike Carbon Dioxide Heat Pump Technology Co ltd; China Railway Design Corp
Current assignee: Ningbo Meike Carbon Dioxide Heat Pump Technology Co ltd; China Railway Design Corp
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-11-09
Anticipated expiration: 2031-03-01

Abstract

The utility model discloses a transcritical CO2 heat pump system uses high-efficient gas heat exchanger belongs to cooling device, including intake pipe and outlet duct, connect through a plurality of spiral cooling tube between intake pipe and the giving vent to anger, the cooling tube is including being used for the outer tube through the coolant liquid and being used for passing through gaseous inner tube, every the outer tube endotheca have two the inner tube, be connected with feed liquor pipe and drain pipe on the outer tube respectively, because the cooling tube is the spiral, can improve the contact time of coolant liquid and gas to improve heat transfer effect, two parallel arrangement's in the outer tube inner tube also can improve the area of contact of gas-liquid exchange, thereby improve heat transfer effect, solved prior art, gas cooler structure is complicated, and heat transfer ability is not good enough, leads to influencing the problem of source heat pump performance.

Description

TranscriticalCO2Efficient gas heat exchanger for heat pump system

Technical Field

The utility model relates to a cooling device especially relates to a transcritical CO2 heat pump system uses high-efficient gas heat exchanger.

Background

The air energy heat pump is driven by a motor, and utilizes the working principle of vapor compression refrigeration cycle to prepare cold (hot) air or cold (hot) water by taking ambient air as a cold (hot) source. The main components of the heat exchange equipment comprise a gas cooler, the structural design of the existing gas cooler is not reasonable enough, the cost is high, and the heat exchange effect is not good enough.

For example, the patent document of China discloses "a transcritical CO2 heat pump gas cooler for refrigeration and heating system", the publication number is CN206339124U, and the gas cooler comprises a gas cooler body, the gas cooler body comprises a first shell and a second shell which are connected in series, a first-stage air inlet and a second-stage water outlet are arranged on the upper portion of the left side of the first shell, a first-stage air outlet is arranged on the lower portion of the left side of the first shell, a second-stage water inlet is arranged on the lower portion of the right side of the first shell, a first-stage water outlet connected with the second-stage water inlet is arranged on the upper portion of the right side of the second shell, a first-stage water inlet and a second-stage air outlet are arranged on the lower portion of the left side of the second shell, heat exchange tubes are arranged in the first shell and the second shell, the heat exchange tubes are fixed on a tube plate, and baffle plates are arranged on the outer walls of the heat exchange tubes at intervals. The utility model has the advantages of adopting the structure form of double-stage heat exchange, improving the heat exchange efficiency, reducing the flow resistance of water and CO2 and bearing higher pressure; however, the disadvantages are that the structural design is complex, the cost is high, and the heat exchange capability is not good enough.

Disclosure of Invention

The utility model relates to an overcome prior art, the gas cooler structure that needs to use among the source heat pump is complicated, and heat transfer capacity is good inadequately, leads to influencing the problem of source heat pump performance, provides a transcritical CO2 high-efficient gas heat exchanger for heat pump system, simple structure, and heat transfer capacity is good to ensure the performance of source heat pump.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model relates to a transcritical CO2 heat pump system uses high-efficient gas heat exchanger, including intake pipe and outlet duct, the intake pipe with give vent to anger between connect through a plurality of spiral shape cooling tube, the cooling tube is including being used for the outer tube through the coolant liquid and being used for through gaseous inner tube, every the outer tube endotheca have two the inner tube, be connected with feed liquor pipe and drain pipe on the outer tube respectively.

CO2 is gaseous follow the cooling tube that admits air in the intake pipe to leave from the outlet duct, and the coolant liquid is followed feed liquor pipe gets into the cooling tube, follows the drain pipe leaves, and in the cooling tube, the coolant liquid is located the outside of inner tube takes place abundant contact with the inner tube to cooling down to admitting air in the inner tube, because the cooling tube is the spiral, can improve the contact time of coolant liquid and gas, thereby improve the heat transfer effect, the area of contact of gas-liquid exchange also can be improved to two parallel arrangement's in the outer tube, thereby improves the heat transfer effect.

Preferably, the air inlet pipe is provided with a deflation valve; before the device is used, residual air may exist in the inner pipe, and CO2 gas can be introduced in advance through the air release valve to exhaust the original air in the device, so that the concentration of CO2 gas is ensured when the device is used.

Preferably, the material of the outer pipe is 304 stainless steel, and the stainless steel material has better strength and corrosion resistance, so that the outer pipe can be prevented from being damaged by collision, and the outer pipe can be prevented from being corroded due to the liquid in the outer pipe, and the service life of the device is prolonged.

Preferably, the material of the inner pipe is red copper, and the red copper has good corrosion resistance and pressure resistance and is suitable for occasions with large pressure of the inner pipe.

Preferably, the liquid inlet pipe is connected with a liquid separation head; the liquid separation head can separate liquid in a single water pipe into a plurality of liquid inlet pipes.

Preferably, the liquid separation head comprises a liquid separation head main body, the liquid separation head main body comprises a plurality of liquid channels connected with the liquid inlet pipe, the liquid separation head main body is connected with an adjusting turntable through a torsion spring, a blade is mounted on one side of the adjusting turntable, which faces away from the liquid separation head main body, and a plurality of adjusting ports are formed in the adjusting turntable; due to the fact that the liquid distributing head can distribute liquid into the liquid inlet pipes, when the liquid pressure is low, the amount of liquid flowing into different liquid inlet pipes is different, the cooling effect in different cooling pipes is different, the gas temperature is uneven, and the performance of the source heat pump is affected; when the liquid pressure is larger, the opening of the adjusting opening is larger, and when the liquid pressure is smaller, the opening of the adjusting opening is smaller, so that the liquid can uniformly enter different liquid inlet pipes.

Preferably, the number of the cooling pipes is 4.

Therefore, the utility model discloses following beneficial effect has: (1) the structure is simple, the gas-liquid contact area is large, the contact time is long, and the heat exchange effect is good; (2) the cooling liquid can be uniformly distributed into the liquid inlet pipes, so that the cooling effect in each cooling pipe is ensured to be similar.

Drawings

Fig. 1 is a schematic view of a front view structure of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic side view of the present invention.

Fig. 4 is a schematic sectional view of the liquid-separating head of the present invention.

Fig. 5 is a schematic side view of the liquid separation head of the present invention.

Fig. 6 is a schematic cross-sectional view of the cooling tube of the present invention.

In the figure: 1. cooling tube 2, intake pipe 3, outlet duct 4, outer tube 5, inner tube 6, bleed valve 7, feed liquor pipe 8, drain pipe 9, divide liquid head 10, divide liquid head main part 11, liquid channel 12, torsional spring 13, regulation carousel 14, blade 15, regulation mouth.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1-5, a transcritical CO2 heat pump system high-efficiency gas heat exchanger includes 4 spiral cooling pipes 1, the spiral axes of the cooling pipes are vertical, a horizontal gas inlet pipe 2 is installed above the cooling pipes, the gas inlet pipe is connected with four cooling pipes through connecting pipes, a horizontal gas outlet pipe 3 is installed below the cooling pipes, and the gas outlet pipe is connected with four cooling pipes through connecting pipes; the air inlet pipe and the air outlet pipe are both galvanized steel pipes of D25 with the wall thickness of 3.2 mm; the cooling tube comprises an outer tube 4 and an inner tube 5, the outer tube is an 1/2 inch 304 stainless steel tube, the inner tube is a phi 6.35 x 1 red copper tube, quartz sand is filled between the inner tube and the outer tube during bending forming, coaxial positioning is carried out, and after bending forming, the quartz sand is poured out; the air inlet pipe is provided with an air release valve 6; the lower end of the cooling pipe is also connected with a liquid inlet pipe 7, and the upper end of the cooling pipe is connected with a liquid outlet pipe 8; the length of feed liquor pipe is 750mm, and the length of drain pipe is 800mm, be connected with branch liquid head 9 on the feed liquor pipe, divide the liquid head including dividing liquid head main part 10, divide the liquid head main part include a plurality of with the liquid channel 11 that the feed liquor union coupling, divide the liquid head main part to pass through torsional spring 12 and be connected with regulation carousel 13, adjust the carousel dorsad install blade 14 on one side of dividing the liquid head main part, be equipped with a plurality of on the regulation carousel and adjust mouthful 15, adjust mouthful in clockwise circumferential direction, the opening size reduces gradually.

When the device is used, the original air in the cooling pipe is discharged through the air release valve, and then the R744 cooling liquid is introduced through the liquid inlet pipe; when liquid flows into the liquid inlet pipe, the pressure of the liquid can drive the blades to rotate, due to the existence of the torsion spring, when the pressure is different, the rotating angles of the adjusting turnplate are different, and when the adjusting turnplate rotates at different angles, the sizes of parts of the adjusting openings, which are aligned to the liquid channel, are different; when the liquid pressure is higher, the opening of the adjusting opening is larger, and when the liquid pressure is lower, the opening of the adjusting opening is smaller, so that the liquid can uniformly enter different liquid inlet pipes; in the cooling pipe, the cooling liquid flows from bottom to top, and the CO2 gas flows from top to bottom, so that sufficient heat exchange occurs, the temperature of the CO2 gas is lowered, and the water temperature is raised.

Claims

1. Transcritical CO₂The efficient gas heat exchanger for the heat pump system is characterized by comprising a gas inlet pipe and a gas outlet pipe, wherein the gas inlet pipe is connected with the gas outlet pipe through a plurality of spiral cooling pipes, each cooling pipe comprises an outer pipe used for passing cooling liquid and an inner pipe used for passing gas, two inner pipes are sleeved in each outer pipe, and a liquid inlet pipe and a liquid outlet pipe are connected to the outer pipes respectively.

2. A transcritical CO according to claim 1₂The efficient gas heat exchanger for the heat pump system is characterized in that an air release valve is arranged on the air inlet pipe.

3. A transcritical CO according to claim 1₂The high-efficiency gas heat exchanger for the heat pump system is characterized in that the material of the outer pipe is 304 stainless steel.

4. A transcritical CO according to claim 1₂The efficient gas heat exchanger for the heat pump system is characterized in that the inner tube is made of red copper.

5. A transcritical CO according to claim 1₂The efficient gas heat exchanger for the heat pump system is characterized in that a liquid separation head is connected to the liquid inlet pipe.

6. A transcritical CO according to claim 5₂High efficiency for heat pump systemGas heat exchanger, characterized by, divide the liquid head including dividing the liquid head main part, divide the liquid head main part include a plurality of with the liquid channel of feed liquor union coupling, divide the liquid head main part to be connected with the regulation carousel through the torsional spring, it is dorsad to adjust the carousel install the blade on one side of dividing the liquid head main part, it adjusts the mouth to be equipped with a plurality of on the regulation carousel.

7. A transcritical CO according to any one of claims 1-6₂The high-efficiency gas heat exchanger for the heat pump system is characterized in that the number of the cooling pipes is 4.