CN100498105C - Full heat exchange air conditioning device - Google Patents

Abstract

A total heat exchange air conditioner, comprising at least one fan providing two immiscible airflows, an air intake pipeline and an exhaust pipeline through which the two airflows respectively pass, a cooling coil arranged on the air intake pipeline, and a cooling coil that can A temperature controller to control the indoor temperature. The intake air flow passes through the cooling coil and exchanges sensible heat with the working medium filled in the coil. The device further includes a total heat exchanger connected with the intake pipeline and the exhaust pipeline. , the intake airflow and exhaust airflow pass through the total heat exchanger for total heat exchange, and the intake airflow first passes through the cooling coil for sensible heat exchange and then enters the total heat exchanger for total heat exchange.

Description

Total heat exchange air conditioner

【Technical field】

The invention relates to a total heat exchange air conditioner, in particular to a total heat exchange air conditioner which applies a total heat exchanger to an air conditioning system to improve the air quality in a closed space.

【Background technique】

In closed buildings, in order to ensure the quality of indoor air, sufficient air exchange is often required, especially in places where people are concentrated, such as auditoriums, large supermarkets, office buildings, etc., in order to timely remove indoor pollutants and pollution. The air is exhausted outside, and at the same time, fresh outdoor air is replenished indoors to dilute the large, diverse and complex sources of harmful pollution generated indoors, so as to provide a comfortable and healthy environment that meets the needs of human health standards.

However, direct introduction of fresh air from the outside will inevitably cause energy loss, and the energy loss will increase simultaneously with the increase of air exchange rate, resulting in an increase in the energy consumption of the air conditioning system, which makes the operating cost of the air conditioning system higher.

In order to provide a more comfortable environment and save energy, people generally install the ice water pipeline of the central air-conditioning system between the roof and the ceiling of the building, and use the circulation of ice water in the system to achieve the effect of cooling. In order for the system to exert a uniform temperature control function throughout the building, several cooling units need to be distributed throughout the room through the ice water delivery pipeline, and the air in each place is cooled by the circulation of ice water in the delivery pipeline. To achieve the function of temperature regulation.

Figure 1 is a schematic diagram of a cooling unit on the delivery line of the air conditioning system. The cooling unit includes a chilled water coil 4 connected to the chilled water host 2 and several fans 6 that allow air flow to pass through the chilled water coil 4 to cool the indoor air. The air-conditioning system passes the air with a higher temperature close to the roof through the ice water coil 4 through the fan 6, and uses the ice water circulating in the ice water coil 4 to cool it down, and then uses the wind under the action of the fan 6 to cool it down. The pipe (not shown) forcibly transports the cooled air to different indoor locations, and the temperature controller 8 is used to adjust the speed of the fan 6 or the damping plate of the air pipe (not shown) to achieve the function of indoor temperature control. Since the above-mentioned cooling units are installed between the roof and the ceiling of each floor, when the cooled low-temperature air is forcibly transported to different indoor locations by the air duct, negative pressure will be generated in other locations close to the roof, making the indoor temperature higher. The air naturally returns to the roof and the ceiling, so the inlets of each fan usually do not need to be piped to achieve indoor circulation of hot and cold air.

The closed building can only provide cold air through the above-mentioned air-conditioning system, but cannot provide sufficient ventilation. If things go on like this, with the release of indoor carbon dioxide and various harmful gases, its concentration will continue to increase, making it necessary to work or live for a long time People in such buildings will inevitably reduce their work efficiency and quality of life, and even lose their health. Therefore, the air quality in airtight buildings needs to be improved urgently.

【Content of invention】

In order to solve the problem that the above-mentioned air-conditioning system does not have a satisfactory effect on improving indoor air quality, an example of a total heat exchange air-conditioning device that can effectively improve indoor air quality is now described.

The total heat exchange air conditioner includes at least one fan that provides two immiscible airflows, an air intake pipeline and an exhaust pipeline for the above two airflows to pass through respectively, a cooling coil and a controllable The temperature controller of the indoor temperature, the intake air flow passes through the cooling coil and exchanges sensible heat with the working medium filled in the coil, the device further includes a total heat exchanger connected with the intake pipeline and the exhaust pipeline, The intake airflow and the exhaust airflow pass through the total heat exchanger for total heat exchange, and the intake airflow first passes through the cooling coil for sensible heat exchange and then enters the total heat exchanger for total heat exchange.

As an improvement of this embodiment, the total heat exchange air conditioner further includes a driving device capable of driving the circulating movement of the working medium in the cooling coil.

As an improvement of this embodiment, the temperature controller controls the indoor temperature by controlling the flow rate of air in the intake pipeline and the exhaust pipeline.

As an improvement of this embodiment, the exhaust gas flow directly enters the total heat exchanger or enters the total heat exchanger after passing through a part of the exhaust pipeline.

As an improvement of this embodiment, the cooling coil is further connected to the exhaust pipeline, so that the exhaust gas flows through the cooling coil to exchange sensible heat with the working medium therein.

As an improvement of this embodiment, the exhaust gas flow first passes through the cooling coil for sensible heat exchange and then enters the total heat exchanger for total heat exchange.

As an improvement of this embodiment, the total heat exchanger is provided with an external air side, a return air side, an air supply side, and an exhaust side, and the total heat exchanger is provided with a filter part near the external air side and the return air side .

As an improvement of this embodiment, the air-conditioning device forms an air inlet and an air supply outlet at the inlet and outlet of the air intake pipeline, and a return air outlet is formed at the inlet of the fan providing exhaust air flow or the inlet of the return air side of the total heat exchanger, An exhaust port is formed at the outlet of the exhaust pipeline, and filter screen parts are arranged at the air inlet, the air supply port, the return air port and the exhaust port. The device builds a full heat exchanger on the existing air conditioning system, which is economical, practical and easy to install and maintain; when working, the intake air enters the room from the outdoor side and conducts sensible heat exchange with the exhaust air from the indoor side to the outside. Latent heat exchange, that is, to ensure sufficient air exchange in the room, and to make the air entering the room have a suitable temperature and humidity, which improves the indoor air quality; when the two streams pass through the total heat exchanger for latent and sensible heat exchange, The fan in the air conditioning system can be used without adding other power components to achieve the effect of saving energy; the exhaust air flow and the intake air flow pass through the total heat exchanger for full heat exchange, and pass through the cooling coil and the work in it. The medium conducts sensible heat exchange to achieve the effect of fully recovering waste heat; the filter part can clean up the floating particles and dust in the passing airflow, prevent the airflow channel of the total heat exchanger from being blocked and affect the total heat exchange efficiency and further improve the air quality .

【Description of drawings】

Further description is made below in conjunction with embodiment with reference to accompanying drawing:

Fig. 1 is a schematic diagram of a cooling unit of an existing air conditioning system;

Fig. 2 is a schematic diagram of the first embodiment of the total heat exchange air conditioner;

Fig. 3 is the structural representation of total heat exchanger;

Fig. 4 is a schematic diagram of the second embodiment of the total heat exchange air conditioning device;

Fig. 5 is a schematic diagram of the third embodiment of the total heat exchange air conditioner;

Fig. 6 is a schematic diagram of the fourth embodiment of the total heat exchange air conditioning device;

Fig. 7 is a schematic diagram of the fifth embodiment of the total heat exchange air conditioning device;

Fig. 8 is a schematic diagram of the connection between each air pipe and the total heat exchanger in each embodiment of the total heat exchange air conditioning device;

Fig. 9 and Fig. 10 are another schematic diagram of the connection mode between each air duct and the total heat exchanger in each embodiment of the total heat exchange air conditioning device;

Fig. 11 is another schematic diagram of the connection mode between each air duct and the total heat exchanger in each embodiment of the total heat exchange air conditioner.

【Detailed ways】

As shown in Figure 2, the air conditioner 20 is arranged between the ceiling A and the roof of the airtight building, including two fans 21 provided by the existing central air conditioning system, and the two fans 21 are respectively used to provide air from the outside I The intake airflow that brings in fresh air and the exhaust airflow that exhausts dirty air from the indoor side II.

The air conditioner 20 further includes an air intake pipeline 22 and an exhaust pipeline 23 for the above-mentioned airflow to pass through, and is arranged on the air intake pipeline 22 and the exhaust pipeline 23 to perform total heat and sensible heat between the two airflows respectively. The total heat exchanger 24 and the cooling coil 25 of the exchange. The intake pipe 22 includes an air intake pipe 221 and an air supply pipe 222 , and the exhaust pipe 23 includes a return air pipe 231 and an exhaust pipe 232 . The air conditioner 20 forms an air inlet 223 and an air supply port 224 at the inlet and outlet of the air intake pipeline 22 respectively, and forms a return air outlet (not shown) at the inlet of the blower fan 21 that provides exhaust air flow, and at the outlet of the exhaust pipeline 23 The outlet forms an exhaust port 233 . The cooling coil 25 is filled with working medium, and sensible heat exchange is performed between the working medium and the passing airflow. The working medium is a substance that is easy to absorb and release heat, and the cooling coil 25 in this embodiment is an ice water coil.

The air conditioner 20 also includes a driving device 26 for driving the working medium to circulate in the cooling coil 25 , and a temperature controller 27 for controlling the indoor temperature. The temperature controller 27 controls the indoor temperature by adjusting the speed of the fan 21 or the damping plate of the air duct (not shown) to control the flow rate of the air in the air intake pipeline 22 and the exhaust pipeline 23 .

Please also refer to Fig. 3, this total heat exchanger 24 is to use the corrugated cardboard or the corrugated board such as the metal plate of surface, plastic plate as partition 241, the humidity and heat exchange film 242 that is moisture-permeable and impermeable is pasted on On the separator 241 , a base material with a plurality of air guide structures is formed, and then the plurality of base material layers are cross-bonded and stacked to form two sets of staggered air channels 243 that are not communicated with each other. The two groups of passages are respectively connected with the air inlet pipe 221, the air supply pipe 222, the return air pipe 231, and the exhaust pipe 232. The inlet and outlet of the total heat exchanger 24 form the outer air side OA, the return air side RA and the air supply side respectively. The air side SA and the exhaust side EA allow the two airflows provided by the fan 21 to enter or leave the total heat exchanger 24 through the inlets and outlets, where temperature and humidity are exchanged.

Under the working condition, the intake air flow is set on the air inlet 223 on the wall of the outdoor side I under the action of the fan 21. After the fresh air from the outdoor side I is introduced into the air intake pipe 221, it directly enters the total heat exchanger 24 from the outside air side OA. After exchanging sensible heat and latent heat with the exhaust air flow, it leaves the total heat exchanger 24 from the air supply side SA, and after being cooled by the cooling coil 25, it is transported to the indoor side II by the air supply port 224, and the fresh air from the outdoor side I The air is introduced into the room; under the action of another fan 21, the exhaust air flows through the air return port to guide the exhaust air from the indoor side II to the cooling coil 25 to cool down, and then transports it to the return air side RA through the return air pipe 231 and enters the total heat exchanger 24. After exchanging sensible heat and latent heat with the intake air flow, it leaves the total heat exchanger 24 from the exhaust side EA, and guides it to the exhaust port 233 on the wall of the outdoor side I through the exhaust pipe 232, and exhausts the exhaust gas in the room outdoor.

The air conditioner 20 builds a total heat exchanger 24 on the existing air conditioning system, which is economical, practical and easy to install and maintain. II leads the exhaust airflow outside the outdoor side I to exchange sensible heat and latent heat, which not only ensures sufficient air exchange volume in the building, but also makes the air entering the room have a suitable temperature and humidity, which improves the indoor air quality; When the air flow passes through the total heat exchanger 24 for exchanging latent heat and sensible heat, it can pass through the fan in the air conditioning system without adding other power components to achieve the effect of saving energy; the exhaust air flow and the intake air flow pass through the total heat exchanger The heat exchanger performs total heat exchange, and conducts sensible heat exchange with the working medium in the cooling coil to fully recover waste heat. These are the main advantages of the air conditioning device.

Fig. 4 is the schematic diagram of the second embodiment of the air conditioner, wherein the operating circuit of the intake air flow is exactly the same as that of the first embodiment; however, the present embodiment is not provided with a return air duct, and the return air port is formed in the return air of the total heat exchanger 24 At the inlet of the side RA, the exhaust airflow is under the action of another fan 21, and the exhaust air in the room is directly introduced into the total heat exchanger 24 from the return air side RA through the air return port, and then leaves from the exhaust side EA after exchanging heat with the intake airflow The total heat exchanger 24 is guided to the exhaust port 233 on the outdoor wall by the exhaust pipe 232 after passing through the fan 21, and the indoor exhaust gas is discharged to the outdoor.

Fig. 5 is a schematic diagram of the third embodiment of the air conditioner, in which the operating route of the intake air flow is exactly the same as that of the first embodiment; the exhaust air flow makes the indoor exhaust gas directly enter the return air duct through the return air outlet under the action of another fan 21 231, and then transported to the return air side RA by the return air pipe 231 to enter the total heat exchanger 24, exchange heat with the intake air, leave the total heat exchanger 24 from the exhaust side EA, and lead to the outdoor side through the exhaust pipe 232 The exhaust port 233 on the wall discharges the exhaust gas in the room to the outside.

Fig. 6 is a schematic diagram of the fourth embodiment of the air conditioner, wherein the intake air flows from the air inlet 223 of the outdoor wall through a fan 21 to introduce the outdoor fresh air into the intake pipe 221, and then guides the air flow to the cooling coil 25 to cool down, then enter the total heat exchanger 24 from the outside air side OA, exchange heat with the exhaust air flow, leave the total heat exchanger 24 from the air supply side SA, and transport it to the room through the air supply port 224 to introduce outdoor fresh air Indoor: under the action of another fan 21, the exhaust air flow first guides the indoor exhaust air to the cooling coil 25 to cool down through the air return port, and then transports it to the return air side RA through the return air pipe 231 to enter the total heat exchanger 24, and the air intake After exchanging heat, the airflow leaves the total heat exchanger 24 from the exhaust side EA, and is guided to the exhaust port 233 on the outdoor wall through the exhaust pipe 232, and exhausts the exhaust gas in the room to the outside.

Fig. 7 is the schematic diagram of the fifth embodiment of the air conditioner, wherein the running circuit of the intake air flow is exactly the same as that of Fig. 6; It is directly transported to the return air side RA through the return air pipe 231 and enters the total heat exchanger 24. After exchanging heat with the intake air, it leaves the total heat exchanger 24 from the exhaust side EA, and is guided to the outdoor wall through the exhaust pipe 232. The exhaust port 233 is used to discharge indoor waste gas to the outside.

Fig. 8 is a schematic diagram of a connection mode between each air duct and the total heat exchange total heat exchanger 24 in each embodiment of the air conditioner. The total heat exchanger 24 is disposed in a casing 244 , and air pipe joints 245 are respectively arranged on the outer walls of the casing 244 corresponding to the inlet and outlet of the total heat exchanger 24 . Wherein, the air pipe connector 245 or the air pipe on the outside air side OA and the return air side RA are respectively equipped with a filter screen part 246 to filter out the pollutants in the passing air flow and improve the air quality; each of the housing 244 A support portion 244A is provided between adjacent inner wall surfaces, and one end of the support portion 244A close to the total heat exchanger 24 is provided with a tile-shaped clamping portion 244B in order to firmly support and closely contact the total heat exchanger 24. four corners, and make the top and bottom planes of the total heat exchanger 24 closely contact with the top and bottom planes of the housing 244 respectively, so that when the above two airflows pass through the total heat exchanger 24, unless they pass through the airflow channel , otherwise the sensible heat and latent heat cannot be exchanged.

Fig. 9 and Fig. 10 are schematic diagrams of another connection mode between air ducts and total heat exchangers in various embodiments of the air-conditioning device. In this embodiment, the total heat exchanger 24 is arranged in a housing 244, and each vertical wall surface in the housing 244 has a supporting part 244A', and one end of the supporting part 244A' is provided with a clamping part 244B', so as to stabilize Support and closely contact the four corners of the total heat exchanger 24, and make the total heat exchanger 24 in close contact with the housing 244, so that when the above two airflows pass through the total heat exchanger 24, unless they pass through the airflow channel 243, Otherwise, the exchange of sensible heat and latent heat cannot be carried out. The two opposite surfaces of the housing 244 are provided with four air pipe connectors 245' corresponding to the inlet and outlet of the total heat exchanger 24, and on the air pipe connectors 245' or air pipes on the outside air side OA and the return air side RA Install a filter screen part (not shown in the figure) respectively.

Fig. 11 is another schematic diagram of the connection manner between each air duct and the total heat exchanger 24 in each embodiment of the air-conditioning device. The difference between this embodiment and the embodiment shown in Figure 9 is that the four air pipe connectors 245' of the embodiment shown in Figure 9 are respectively arranged on two opposite surfaces of the casing 244, while the embodiment shown in this figure In this example, four air pipe joints 245 ″ are arranged on one surface of the casing 244 .

In each embodiment of the air-conditioning device, the positions of the four air pipe joints where each air pipe is connected to the total heat exchanger can be configured differently according to the two streams of air intake and exhaust and the relative positions of existing facilities, for example : The air duct joints of the intake air flow through the external air side and the air supply side can be respectively set on the corresponding positions of the top and bottom planes of the shell, and the air duct joints of the exhaust air flow through the return air side and the exhaust side It can also be respectively connected to corresponding positions on the two planes of the top and bottom of the housing; similarly, the above four air pipe joints can also be respectively arranged on corresponding positions of any plane on the top or bottom of the housing.

In Fig. 8 to Fig. 11, the method of making the clamping part and the four corners of the total heat exchanger close contact is to paste a layer of air-tight cushion on the contact surface of the clamping part, or by pasting the air-tight cushion It is achieved on the contact surfaces of the four corners of the total heat exchanger. Similarly, the above method can also be used to connect the top and bottom planes of the total heat exchanger with the top and bottom planes of the corresponding shell respectively. touch. The shape of the air pipe joint can be in different shapes according to the sectional surface of the air pipe, for example: round, square, rectangular, etc.

The air conditioner can be equipped with filters at the air return port and air supply port on the indoor side, and the air inlet and exhaust port on the outdoor side to filter out the fresh air introduced from the outside and the dirty air discharged from the room. The floating particles and dust can prevent the airflow channel of the total heat exchanger from being blocked, which will affect the total heat exchange efficiency and further improve the air quality; the filter part can also include devices with air cleaning, deodorizing and sterilizing functions, such as photocatalysts. , Negative ion generator, activated carbon, etc., to enhance the indoor air quality, which is also the advantage of the air conditioner.

In this air conditioner, the air supply port of the air intake air can also be connected to the ceiling grid panels at different positions through several branch pipes arranged on the air supply pipe, so that the air supply into the room can be evenly distributed; similarly, The air return port of the above-mentioned exhaust air flow can also be connected to the ceiling grid plate at different positions through several branch pipes arranged on the air return pipe, so as to draw indoor air into the return air side of the total heat exchange total heat exchanger.

When a cooling unit in the air conditioner includes more than two blowers, the blowers can still be divided into two streams of air intake and exhaust, and a number of existing branch pipes can be merged to achieve a complete heat transfer through the total heat exchanger. Purpose: You can also choose to maintain the original function of some of the fan piping, and divide the other fans of the cooling unit into two streams of air intake and exhaust, and use the existing several branch pipes to merge the piping to achieve a complete construction. Purpose of heat exchange air conditioner.

Claims (8)

1. full heat exchange air conditioning device, at least one two strands of not blower fans of phase mixed airflow that provide are provided, the air inlet pipeline and the gas exhaust piping that supply above-mentioned two strands of air-flows to pass through respectively, be located at the cooling coil on this air inlet pipeline and can control the temperature controller of indoor temperature, this charge air flow pass cooling coil and with coil pipe in the working media of filling carry out the sensible heat exchange, this device further comprises the total-heat exchanger that is connected with air inlet pipeline and gas exhaust piping, this charge air flow and exhaust airstream carry out full heat exchange by this total-heat exchanger, it is characterized in that: this charge air flow is carried out entering total-heat exchanger again after sensible heat exchanges through cooling coil earlier and is carried out full heat exchange.

2. full heat exchange air conditioning device as claimed in claim 1 is characterized in that: this device comprises that further one can drive the drive unit of working media shuttling movement in the cooling coil.

3. full heat exchange air conditioning device as claimed in claim 1 is characterized in that: this temperature controller is controlled indoor temperature by the flow velocity of air in control air inlet pipeline and the gas exhaust piping.

4. full heat exchange air conditioning device as claimed in claim 1 is characterized in that: this exhaust airstream enters total-heat exchanger after directly entering total-heat exchanger or process part gas exhaust piping.

5. full heat exchange air conditioning device as claimed in claim 1 is characterized in that: this cooling coil further is arranged on the gas exhaust piping, and exhaust airstream carries out the sensible heat exchange through cooling coil and working media wherein.

6. full heat exchange air conditioning device as claimed in claim 5 is characterized in that: this exhaust airstream carries out entering total-heat exchanger again after sensible heat exchanges through cooling coil earlier and carries out full heat exchange.

7. full heat exchange air conditioning device as claimed in claim 1 is characterized in that: this total-heat exchanger is provided with outer gas side, return-air side and air feed side, exhaust side, and this total-heat exchanger is provided with filter screen portion near the position of outer gas side and return-air side.

8. full heat exchange air conditioning device as claimed in claim 7, it is characterized in that: this aircondition is respectively at the inlet of air inlet pipeline and go out the interruption-forming air inlet and the air feed mouth, go into the interruption-forming return air inlet in the inlet of the blower fan that exhaust airstream is provided or total-heat exchanger return-air side, gas exhaust piping go out the interruption-forming exhaust outlet, described air inlet, air feed mouth, return air inlet and exhaust ports are equipped with filter screen portion.

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