CN201155837Y - A new type of heat recovery device - Google Patents

Abstract

The utility model provides a new unpowered heat pipe type heat recovery device, which is characterized in that: the heat recovery device includes a pair of fresh air pipes and exhaust pipes arranged adjacently, and also includes one or a group of heat pipes, the heat pipes Transverse the adjacent wall of the fresh air pipe and the exhaust pipe, and its two ends are respectively located in the new air pipe and the exhaust pipe, and the mouth of the new air pipe or the exhaust pipe is connected with the outside. Wind-driven hood device that drives its own fan to introduce or exhaust air. The non-powered heat pipe type heat recovery device of the utility model has a simple structure, is convenient for processing and transportation, is also very easy to install, has no directional requirements, and can be installed in vertical, inclined, and horizontal directions.

Description

A new type of heat recovery device

technical field

The utility model specifically relates to an air heat recovery device that can be independently applied to a closed building space and works by using the phase change of the working liquid in the heat pipe and the principle of thermal pressure and wind pressure without a power hood, and is suitable for heating, ventilation and air conditioning projects technology field.

Background technique

The quality of indoor air quality (abbreviated as IAQ) is very important to people's health.

The most widely used method to improve indoor air quality is to introduce fresh air into the room, especially in a closed room equipped with an air conditioner, it is necessary to introduce a certain amount of fresh air to improve the air quality. However, the introduction of fresh air will inevitably increase the heat load of the air conditioning system and also affect the temperature of the room.

In the current non-central air-conditioning system, the introduction of fresh air directly replaces the indoor air, and the replaced air contains considerable heat or cold energy, thus causing a waste of energy. If the room is equipped with a small heat recovery device Recycling and using the recovered heat to heat or cool the fresh air will save a lot of energy.

The heat recovery devices are currently mainly used in combination with the central air conditioning system, mainly including: wheel heat recovery devices, plate heat recovery devices, water circulation heat recovery devices, heat pump heat exchangers, etc.

Among them, the wheel-type heat recovery device alternates between two media, which cannot completely avoid cross-contamination. It is required that the gas flowing through must be harmless, and the equipment is relatively large, and it needs to consume a certain amount of kinetic energy; the plate heat exchanger device does not need transmission. The component has a simple structure and low cost, but it has very high requirements on the material of the partition, which needs to be replaced frequently, difficult to maintain, and the heat recovery efficiency is not high; the circulation pump in the water circulation heat recovery device consumes energy and heat The recovery efficiency is not high, and only in winter when the outdoor temperature is low can there be a good energy-saving effect; although the heat pump heat exchanger has high thermal efficiency and can recover a large amount of heat energy, it needs to be equipped with compressors, condensers, evaporators, etc. A series of supporting facilities have high energy consumption and high equipment investment costs.

Utility model content

Aiming at the shortcomings and deficiencies of the prior art, the purpose of this utility model is to provide a heat pipe type heat recovery device which has a simple structure and can operate by itself without providing power. The utility model can be used in miniaturization, and can also be used for ventilation of large factory buildings.

The technical scheme of the utility model is as follows:

A new unpowered heat pipe type heat recovery device is characterized in that: the heat recovery device includes a pair of fresh air ducts and exhaust ducts arranged adjacently, and also includes one or a group of heat exchangers, and the heat pipes traverse the new The pipe walls adjacent to the air duct and the exhaust duct and their two ends are respectively located in the new air duct and the exhaust duct, and the mouth of the new air duct or the exhaust duct connected to the outside is provided with a device that can be driven by the wind. A hood assembly that drives its own fan to introduce or exhaust air.

The heat exchanger is a heat pipe heat exchanger, and the heat pipe heat exchanger is a gravity heat pipe or a capillary core heat pipe heat exchanger

A capillary core is arranged in the tube wall of the capillary core heat pipe along the longitudinal direction of the tube body, and the capillary core communicates with the inner cavity of the heat pipe.

The capillary core is a capillary structure composed of axial grooves, sintered metal powder or wire mesh.

A group of capillary cores are uniformly distributed in a ring shape in the capillary core heat pipe.

A set of evenly arranged metal fins are arranged on the heat pipe.

The fresh air duct and the exhaust duct are separated by a partition in the middle of a channel with a rectangular cross section.

The separator is made of a material with good thermal conductivity.

A heat insulating layer is provided on the side wall of the rectangular cross-section channel.

The hood device includes a wind wheel and its shaft that can be driven by external wind, and a fan driven by the shaft. The fan rotates under the drive of the wind wheel so as to form an inlet or outlet in the fresh air duct or the exhaust duct. Directed air flow of exhaust air.

The technical effect of the utility model is:

The utility model is mainly composed of a fresh air pipe, an exhaust pipe, a heat pipe (heat exchanger) crossing the two passages, and a wind cap located at the outdoor port of the passage. On the one hand, the heat recovery device of the present invention is equipped with a wind cap, which can use the wind energy in nature to provide the driving force required to drive the air flow when exchanging fresh air. Therefore, compared with the existing ventilation device, the present utility model does not need additional energy consumption On the other hand, the heat pipe (heat exchanger) located in the fresh air pipe and the exhaust pipe can absorb and transmit the heat energy contained in the exhaust air to the fresh air, thereby reducing the power consumption of the indoor air conditioner. Two aspects to achieve the purpose of energy saving.

In the non-powered heat pipe type heat recovery device of the present invention, the two ends of the heat pipe are respectively located in the fresh air pipe and the exhaust air pipe, which correspond to the evaporation section or the condensation section of the heat pipe according to the difference between the cold and hot seasons, and the heat pipe is equipped with working liquid. (Ammonia water is generally used), the working liquid in the evaporation section of the heat pipe becomes steam and flows to the condensation section due to the heat of the tube wall (absorbing heat from the hot air), and the steam in the condensation section transfers heat to the cold air flow outside the tube through the tube wall , itself condenses into a liquid, and the condensed liquid flows back to the evaporation section along the tube wall. The liquid absorbs heat and then evaporates..., and so on, the heat in the hot air flow can be continuously transferred to the cold air flow (that is, the fresh air is heated or cooled), so as to achieve the purpose of recycling the heat or cold energy in the exhaust gas .

The heat pipe of the utility model is provided with a capillary core structure, and the capillary core is arranged longitudinally along the heat pipe and communicates with the inner cavity of the pipe. This capillary core structure can increase the heat exchange area on the one hand, and provide capillary driving force on the other hand. The capillary driving force can promote the rapid flow of steam to the condensation section, and at the same time promote the rapid return of the condensed liquid to the evaporation section along the tube wall, so it can be significantly improved. Improve the heat exchange efficiency of the heat pipe.

The non-powered heat pipe type heat recovery device of the utility model has no moving parts, does not need to consume any external energy, and completely relies on the wind energy of nature to work. Even in the case of no wind, the heat recovery device of the utility model can also be used The principle of thermocompression (warm pressure) provides the driving force for the air to flow through the heat exchanger.

The non-powered heat pipe type heat recovery device of the utility model has a simple structure, is convenient for processing and transportation, is also very easy to install, has no directional requirements, and can be installed in vertical, inclined, and horizontal directions.

The non-powered heat pipe type heat recovery device of the utility model can recycle the cooling capacity and heat in the exhaust air in the family room no matter in summer or winter, and has remarkable energy-saving effect and economic benefit.

Description of drawings

Fig. 1 shows the structural representation of the unpowered heat pipe type heat recovery device of the present utility model;

Fig. 2 is a schematic cross-sectional view of the heat pipe;

Fig. 3 is a schematic structural diagram of a plate heat exchanger.

Reference signs: 1-wind cap, 2-fan, 3-heat pipe heat exchanger, 4-heat pipe, 41-pipe wall, 42-capillary core, 5-fin, 6-fresh air pipe, 7-exhaust pipe, 8-fresh air inlet, 9-fresh air outlet, 10-exhaust air inlet; 11-exhaust air outlet; 12-baffle; 13-housing.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

FIG. 1 is a schematic structural view of the non-powered heat pipe heat recovery device of the present invention.

In this embodiment, the heat recovery device divides the inner cavity of the housing 13 into two independent channels by the partition plate 12 provided in the middle, which are respectively the fresh air pipe 6 and the exhaust air pipe 7, wherein the fresh air pipe 6 is provided with fresh air pipes at both ends. The inlet 8 and the fresh air outlet 9, the two ends of the exhaust pipe 7 are provided with an exhaust inlet 10 and an exhaust outlet 11, wherein the fresh air outlet 9 and the exhaust inlet 10 communicate with the indoor respectively, and the fresh air inlet 8 and the exhaust outlet 11 communicate with the outdoor respectively. In the same way, a wind cap 1 and a fan 2 are arranged at the outer ends of the fresh air inlet 8 and the exhaust air outlet 11, and the wind cap 1 and the fan 2 are connected by a shaft structure, and the wind cap 1 can drive the fan 2 to rotate under the action of the outdoor wind, thereby The directional air flow shown in the figure is formed in the two passages, the outdoor fresh air enters the room through the fresh air pipe 6, and the indoor exhaust air is discharged to the outside through the exhaust pipe 7.

The heat pipe heat exchanger 3 is located in the middle of the inner cavity of the casing 13 , and the heat pipe heat exchanger 3 is composed of heat pipes 4 and fins 5 . The partition 12 is drilled with many holes matching the section of the heat pipe 4. During installation, the heat pipe 4 passes through the hole and closely fits with the partition 12. The edge of the partition 12 is seamlessly connected with the inner surface of the housing 13. Together, the cavity of the housing 13 is divided into two mutually isolated spaces, that is, the fresh air pipe 6 and the exhaust pipe 7. The two ends of the heat pipe 4 are respectively in the fresh air pipe 6 and the exhaust pipe 7. The operation season of the heat recovery device is related, and it is used as the evaporation section or the condensation section according to the different working conditions of cooling or heating. A large number of fins 5 are distributed on the heat pipe 4 , and the fins 5 are thin aluminum plate structures, and are closely matched with the heat pipe 4 through expansion joints.

The casing 13 can be made of heat insulating material, and the partition 12 is made of a material with good thermal conductivity. In order to increase the rigidity and strength of the whole device, the partition can be made of a metal plate, such as a common steel plate. Fresh air inlet 8, fresh air outlet 9, exhaust air inlet 10, and exhaust air outlet 11 are all made of galvanized steel sheets.

The heat pipe 4 is made of aluminum pipe, and the working liquid of the heat pipe 4 is ammonia water.

Fig. 2 shows the structure of a heat pipe applied in the present invention.

In the tube wall 41 of the heat pipe 4, a group of capillary cores 42 are evenly distributed in a ring shape, and the capillary cores 42 communicate with the lumen of the heat pipe 4. In this embodiment, the capillary cores 42 adopt an axial groove capillary core structure, and can also be made of sintered metal. Powder, wire mesh and other capillary core structures can meet the requirements.

This heat pipe 4 with a capillary wick 42, the capillary wick 42 can use the capillary driving force to promote the steam in the evaporating section to move to the condensing section more quickly, and can also promote the condensate to return to the evaporating section more quickly for re-evaporation, in turn It is obvious that this heat pipe structure has greater heat exchange efficiency than the existing common heat pipes.

Of course, the heat pipe heat exchanger of the present utility model can also adopt a gravity heat pipe heat exchanger.

When the heat recovery device of the present utility model operates in summer, when there is wind, the fresh air with a higher temperature enters the fresh air pipe 6 through the wind cap 1, and evaporates and cools when the fresh air passes through the heat pipe 4, and enters through the fresh air outlet 9 after cooling. Indoors, at the same time, the indoor exhaust air enters the exhaust pipe 7 through the exhaust air inlet 10, condenses and heats when passing through the heat pipe 4, and is discharged outside through the exhaust air outlet 11 after heating, thereby completing the recovery and utilization of the indoor exhaust air cooling capacity. It should be pointed out that when there is no wind, the driving force of fresh air and exhaust air is provided by the thermal pressure difference between indoor and outdoor.

In winter operating conditions, when there is wind, the outdoor fresh air enters the fresh air pipe 6 through the wind cap 1, and condenses and heats when the fresh air passes through the heat pipe 4. After heating, it enters the room through the fresh air outlet 9. At the same time, the indoor exhaust air passes through The exhaust air inlet 10 enters the exhaust air pipe 7, evaporatively cools when passing through the heat pipe 4, and is discharged outside through the exhaust air outlet 11 after cooling, thereby completing the recovery and utilization of indoor exhaust air heat. It should be pointed out that when there is no wind, the driving force of fresh air and exhaust air is provided by the thermal pressure difference between indoor and outdoor.

Certainly, the heat pipe heat exchanger in the present invention can also adopt other forms of heat exchangers, such as the plate heat exchanger shown in FIG. 3 .

The above descriptions are only preferred implementations of the present utility model. For those skilled in the art, many variations and improvements can be made according to the essence of the utility model, but these variations and improvements will all fall within the protection scope of the utility model.

Claims (10)

1. A novel unpowered heat pipe type heat recovery device, characterized in that: the heat recovery device includes a pair of adjacent fresh air pipes and exhaust pipes, and also includes one or a group of heat exchangers, the heat pipe Transverse the adjacent wall of the fresh air pipe and the exhaust pipe, and its two ends are respectively located in the new air pipe and the exhaust pipe, and the mouth of the new air pipe or the exhaust pipe is connected with the outside. Wind-driven hood device that drives its own fan to introduce or exhaust air. 2. The new unpowered heat pipe heat recovery device according to claim 1, wherein the heat exchanger is a heat pipe heat exchanger, and the heat pipe is a gravity heat pipe or a capillary heat pipe. 3. The new unpowered heat pipe heat recovery device according to claim 2, characterized in that: a capillary wick is arranged in the wall of the capillary heat pipe along the longitudinal direction of the tube body, and the capillary wick communicates with the inner cavity of the heat pipe. 4. The new unpowered heat pipe heat recovery device according to claim 3, characterized in that: the capillary core is an axial groove, sintered metal powder or wire mesh structure. 5. The novel unpowered heat pipe type heat recovery device according to claim 4, characterized in that: a group of capillary cores are uniformly distributed in a ring shape in the heat pipe. 6. The new unpowered heat pipe heat recovery device according to claim 5, characterized in that: the heat pipe is provided with a group of evenly arranged metal fins. 7. The new unpowered heat pipe heat recovery device according to claim 6, characterized in that: the fresh air pipe and the exhaust air pipe are separated by a partition in the middle of a channel with a rectangular cross section. 8. The novel unpowered heat pipe type heat recovery device according to claim 7, characterized in that: the separator is made of a material with good thermal conductivity. 9. The new type heat recovery device without power heat pipe according to claim 8, characterized in that: the side wall of the channel with a rectangular cross section is provided with a heat insulating layer. 10. The novel unpowered heat pipe type heat recovery device according to claim 9, characterized in that: the hood device comprises a wind wheel and its shaft driven by external wind, and a fan driven by the shaft, and the fan Driven by the wind wheel, it rotates to form a directional airflow for introducing or exhausting air in the fresh air duct or the exhaust duct.

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