Heat recovery device used in fresh air ventilator

Abstract

The utility model provides a heat recovery device used in a fresh air machine, which comprises a condensate collector arranged below an evaporator in an air inlet channel and used for collecting condensate water dehumidified by the evaporator; one end of the pipeline is connected to an opening in the lower portion of the condensate collector, and the other end of the pipeline extends to the position above the exhaust condenser in the exhaust channel; the spraying head is arranged at the port of the other end of the pipeline, and the spraying direction of the spraying head faces the exhaust condenser; and the condensate water is sprayed to the outside of the exhaust condenser after passing through the pipeline and the spray header. The condensation temperature difference of the exhaust condenser is increased, heat exchange of the exhaust condenser is more sufficient, the heat exchange amount is larger, a fluorine refrigeration dehumidification scheme is operated in a higher energy efficiency interval, and the energy efficiency of the whole machine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fresh air equipment, in particular to a heat recovery device for a fresh air machine. BACKGROUND

[0002] The fresh air machine is a heat exchange device for filtering air pollution, which can circulate indoor air, discharge indoor polluted air to the outside, and input fresh outdoor air to the indoor after sterilization, disinfection and filtration, so as to obtain fresh and clean air in the indoor. Figure 1 As shown in the figure, the fresh air machine has an independent air inlet channel 2 and an air outlet channel 3, wherein the air inlet channel 2 is used to filter the outdoor air and adjust the temperature and humidity to send the appropriate fresh air to the indoor, and the air outlet channel 3 is used to collect the indoor air, filter and discharge to the outdoor. The air inlet channel 2 includes a fresh air filtering section 21, a first waste heat recovery section 22, a dehumidification reheating section 23, an enthalpy increasing humidification section 24 and a supply air section 25 connected in sequence, and the air outlet channel 3 includes an air outlet filtering section 31, a humidification water tank section 32 and an air outlet condensing section 33, a second waste heat recovery section 34 and an air outlet section 35 connected in sequence. The dehumidification scheme in the dehumidification reheating section generally adopts a single cold source (fluorine / water) or double cold source (water pre-cooling & fluorine dehumidification) system for refrigeration dehumidification. The fluorine refrigeration dehumidification scheme will use the condensation heat generated after air dehumidification for reheating, which not only limits the heat recovery efficiency, but also causes the supply air temperature to be too high and the indoor temperature to continue to rise, affecting the user's comfort. In some technical solutions, the initial condensation heat is discharged to the outdoor by the air outlet channel, and only part of the condensation heat is used for reheating to adjust the supply air temperature, but in this way, only the sensible heat generated by the refrigeration dehumidification can be recovered, and a large amount of latent heat is discharged with the condensate water; and because the air outlet temperature is high, the condensing effect of the air outlet condensing section 33 is limited, which affects the dehumidification energy efficiency range of the entire fresh air machine. SUMMARY

[0003] The technical problem to be solved by the present application is that the heat recovery efficiency is limited in the fluorine refrigeration dehumidification scheme in the prior art, especially in the new air working condition with high humidity and low temperature, the heat recovery efficiency and dehumidification energy efficiency are low, and a heat recovery device for a fresh air machine is provided.

[0004] The technical scheme of the present application provides a heat recovery device for a fresh air machine, which comprises:

[0005] A condensate collector is arranged below the evaporator in the air inlet channel to collect the condensate obtained after dehumidification by the evaporator;

[0006] A pipeline is connected to the opening below the condensate collector, and the other end of the pipeline extends above the air outlet condenser in the air outlet channel;

[0007] A spray head is arranged at the other end of the pipeline, and the spray direction of the spray head is towards the exhaust condenser.

[0008] In some schemes, the heat recovery device for the fresh air machine is provided with a flow regulating valve in the pipeline, and the flow regulating valve is adjusted to a set flow value in advance.

[0009] In some schemes, the heat recovery device for the fresh air machine is provided with a first electric control valve in the pipeline, and the first electric control valve is opened under the control of a remote controller.

[0010] In some schemes, the heat recovery device for the fresh air machine is provided with a second electromagnetic valve in the pipeline.

[0011] A weight sensor is arranged below the condenser collector, and when the detection result of the weight sensor reaches a set weight value, an opening trigger signal is sent to the second electromagnetic valve.

[0012] In some schemes, the heat recovery device for the fresh air machine is provided with a filter at one end of the pipeline.

[0013] In some schemes, the heat recovery device for the fresh air machine is provided with a filter at one end of the pipeline.

[0014] In some schemes, the heat recovery device for the fresh air machine is provided with a filter at one end of the pipeline.

[0015] In some schemes, the heat recovery device for the fresh air machine is provided with a filter at one end of the pipeline.

[0016] In some schemes, the heat recovery device for the fresh air machine is provided with a filter at one end of the pipeline.

[0017] In some schemes, the heat recovery device for the fresh air machine is provided with a filter at one end of the pipeline.

[0018] The above technical solutions provided by the present application have the following technical effects compared with the prior art:

[0019] The heat recovery device for a fresh air machine provided in the application uses a condensate collector to collect the condensate obtained after the evaporator is dehumidified, and then sprays the condensate to the exhaust condenser through a pipeline and a spray head, so that the condensation temperature difference of the exhaust condenser is larger, the heat exchange of the exhaust condenser is more sufficient, the heat exchange amount is larger, and then the fluorine refrigeration dehumidification scheme is operated in a higher energy efficiency interval, and the overall machine energy efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the internal structure of the prior art fresh air machine.

[0021] Figure 2 It is a schematic diagram of the structure of the heat recovery device for a fresh air machine according to an embodiment of the application.

[0022] Figure 3 It is a schematic diagram of the structure of the heat recovery device for a fresh air machine according to another embodiment of the application.

[0023] The reference signs in the drawings represent:

[0024] 1 - fresh air machine box; 2 - air inlet channel, 3 - exhaust air channel, 21 - fresh air filtering section, 22 - first waste heat recovery section, 23 - dehumidification and reheating section, 24 - enthalpy increasing and humidifying section, 25 - supply air section, 31 - exhaust air filtering section, 32 - humidifying water tank section, 33 - exhaust air condensing section, 34 - second waste heat recovery section, 35 - exhaust air section;

[0025] 10 - evaporator, 20 - condensate collector, 30 - condensate, 40 - pipeline, 50 - spray head, 60 - exhaust condenser, 70 - valve, 80 - flow regulating valve. DETAILED DESCRIPTION

[0026] The specific embodiments of the application will be further described below in conjunction with the drawings.

[0027] It is easy to understand that, according to the technical scheme of the application, a person skilled in the art can replace various structural modes and implementation modes without changing the essential spirit of the application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical scheme of the application, and should not be regarded as the whole or as a limitation or restriction on the technical scheme of the application.

[0028] In this specification, the up, down, left, right, front, back, front, back, top, bottom and other orientation terms mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, which are relative concepts, and therefore can change accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0029] The embodiment provides a heat recovery device for a fresh air machine, as shown in the drawings. Figure 1 As shown in the drawings, the inside of the fresh air machine box 1 is divided into an air inlet channel 2 and an air outlet channel 3, the air inlet channel 2 is one or more air channels for introducing outdoor fresh air into the indoor, the air outlet channel 3 is one or more air channels for leading indoor exhaust air to the outdoor, the air outlet channel 3 and the air inlet channel 2 are independent of each other, and the air is relatively sealed, but part of the pipelines or devices inside the air inlet channel 2 and the air outlet channel 3 can be connected to each other to more reasonably utilize the internal space. The air inlet channel 2 is provided with a dehumidification and reheating section 23 and a part of the enthalpy increasing and humidifying section 24, so that the fresh air machine can be adjusted and processed in terms of temperature and humidity before the outdoor air enters the indoor, and then the air entering the fresh air inlet from the outdoor to the air outlet and then to the indoor through the fresh air machine is clean and meets the temperature and humidity requirements of the user. According to the flow direction of the indoor return air, the air outlet channel 3 is sequentially connected and composed of an air outlet filtering section 31, a humidifying water tank section 32, an air outlet condensing section 33, a second waste heat recovery section 34 and an air outlet section 35. The humidifying water tank section 32 is used to store the water required by the enthalpy increasing and humidifying section 24, the excess condensation heat generated by the refrigeration and dehumidification in the air inlet channel 2 can be released to the air outlet and then taken out to the outdoor by setting the air outlet condensing section 33, so as to prevent the accumulation of heat in the fresh air machine, and the waste heat in the air outlet can also be recovered by the second waste heat recovery section 34 to prepare domestic hot water.

[0030] The heat recovery device for the fresh air machine in the application, in combination with Figure 2 and Figure 3 , comprises:

[0031] A condensate collector 20 is arranged below the evaporator 10 in the air inlet channel, and collects the condensate 30 obtained after the dehumidification by the evaporator 10. The evaporator 10 is an evaporator in the dehumidification and reheating section 23, and the dehumidification and reheating section 23 comprises a water table cooler and a condensation waste heat reheater in addition to the evaporator. In the present scheme, the evaporator 10 can be a direct expansion dehumidification evaporator.

[0032] A pipeline 40 is connected to the opening below the condensate collector 20, and the other end of the pipeline 40 extends to above the air outlet condenser 60 in the air outlet channel. The air outlet condenser 60 is the main device in the air outlet condensing section 33. The air outlet condensing section 33 can also comprise a second heat exchanger and a dehumidification compressor and the like.

[0033] A spray head 50 is arranged at the other end port of the pipeline 40, and the spray direction of the spray head 50 is towards the air outlet condenser 60. The condensate 30 is sprayed to the outside of the air outlet condenser 60 through the pipeline 40 and the spray head 50.

[0034] The above scheme of the present application collects the condensed water 30 obtained after the evaporator 10 is dehumidified by the condensate collector 20, and then sprays the condensed water 30 to the exhaust air condenser 60 through the pipeline 40 and the spray head 50, so that the condensation temperature difference of the exhaust air condenser 60 is larger, the heat exchange of the exhaust air condenser 60 is more sufficient, the heat exchange amount is larger, and then the fluorine refrigeration dehumidification scheme is operated in a higher energy efficiency interval, and the overall machine energy efficiency is improved.

[0035] In some schemes, the heat recovery device for the fresh air machine is provided with a valve 70 in the pipeline 40, and the valve 70 can be an electrically controlled valve. Because the evaporator 10 will only produce condensed water 30 during dehumidification in the refrigeration mode, the valve 70 should be opened in the refrigeration mode and closed in the heating mode. Therefore, in some schemes, a first electrically controlled valve is arranged in the pipeline 40, and the first electrically controlled valve is opened under the control of the remote controller. That is, the remote controller opens the first electrically controlled valve at the same time when the refrigeration mode is opened.

[0036] In addition, in order to ensure the spraying effect, the valve 70 can be opened when the condensed water 30 collected in the condensate collector 20 reaches a certain amount, and closed if it does not reach a certain amount. Therefore, as an implementation manner, a second electromagnetic valve is arranged in the pipeline 40; a weight sensor is arranged below the condenser collector 20, and the weight sensor sends an opening trigger signal to the second electromagnetic valve when the detection result of the weight sensor reaches a set weight value. The set weight value can be determined according to the volume of the condenser collector 20, for example, the second electromagnetic valve is opened when the condensed water collected by the condenser collector 20 reaches 80%, and the condensed water 30 can be sprayed onto the exhaust air condenser 60, so that better spraying cooling effect can be achieved.

[0037] Generally, the temperature of the gas in the exhaust air passage is about 30℃, and the exhaust air condenser 60 is cooled to about 20℃ after condensation treatment. The condensed water 30 obtained during dehumidification and cooling is about 3℃, so spraying the condensed water 30 to the outside of the exhaust air condenser 60 can improve the condensation efficiency.

[0038] Further, in some schemes, the heat recovery device for the fresh air machine is provided with a flow regulating valve 80 in the pipeline 40, and the flow regulating valve 80 is adjusted to a set flow value in advance. When the second electromagnetic valve is set, the condensed water 30 will flow into the pipeline 40 at a certain moment, and the present application scheme ensures that the spraying process of the condensed water 30 is uniform and controllable by setting the flow regulating valve 80.

[0039] Preferably, the heat recovery device in the fresh air machine in some schemes, one end of the pipeline 40 is provided with a filter. The impurities possibly existing in the condensed water 30 are filtered through the filter. Further, the filter comprises a porous framework and a textile fiber yarn wound on the porous framework. The porous framework wound textile fiber yarn can play a good filtering effect, and has a lower cost, and is convenient to be clamped inside the pipeline 40. Further preferably, the pipeline 40 is inclined, and the end close to the condensate collector 20 is higher than the end close to the exhaust condenser 60. By inclining the pipeline 40, the condensed water 30 can flow in the pipeline.

[0040] The heat recovery device in the fresh air machine in the above scheme, the spray head 50 comprises a plurality of, and a plurality of the spray head 50 is uniformly distributed above the exhaust condenser 60. In this way, it can be ensured that the outside of the exhaust condenser 60 is sprayed, and in specific implementation, the spraying range of all the spray heads 50 can be as large as possible to spray the outer surface of the exhaust condenser 60.

[0041] In some schemes, the outer side of the pipeline 40 is covered with a heat preservation layer. By setting the heat preservation structure, the low temperature of the condensed water 30 in the pipeline can be further maintained.

[0042] The heat recovery device in the fresh air machine in the above scheme, the lower side of the exhaust condenser 60 is provided with a waste water collector. The condensed water 30 sprayed to the outside of the exhaust condenser 60 may be volatilized with the airflow of a higher temperature, but there will still be residues. The application sets a waste water collector to recover the part of the residual condensed water, so as to avoid affecting the work of other parts in the fresh air machine. The residual condensed water collected by the waste water collector can be discharged through the water pipe extending to the outside of the machine case.

[0043] According to the needs, the above technical schemes can be combined to achieve the best technical effect.

[0044] The above is only the principle and preferred embodiment of the present application. It should be noted that for those skilled in the art, on the basis of the principle of the present application, a number of other variations can also be made, which should be regarded as the protection scope of the present application.

Claims

1. A heat recovery device for use in a fresh air unit, characterized in that, The application relates to a heat recovery device for a fresh air machine, which comprises the following parts: a condensate collector arranged below an evaporator in an air inlet channel to collect condensate obtained after dehumidification by the evaporator; a pipe connected to an opening below the condensate collector, the other end of the pipe extending above an exhaust air condenser in an exhaust air channel; a spray head arranged at the other end of the pipe, the spray direction of the spray head being towards the exhaust air condenser, and the condensate being sprayed outside the exhaust air condenser through the pipe and the spray head.

2. The heat recovery device for a fresh air machine according to claim 1, wherein: a flow regulating valve is arranged in the pipe, and the flow regulating valve is pre-adjusted to a set flow value.

3. The heat recovery device for a fresh air machine according to claim 2, wherein: a first electric control valve is arranged in the pipe, and the first electric control valve is opened under the control of a remote controller.

4. The heat recovery device for a fresh air machine according to claim 2, wherein: a second electromagnetic valve is arranged in the pipe; a weight sensor is arranged below the condensate collector, and the weight sensor sends an opening trigger signal to the second electromagnetic valve when the detection result of the weight sensor reaches a set weight value.

5. The heat recovery device for a fresh air machine according to any one of claims 1-4, wherein: a filter is arranged at one end of the pipe.

6. The heat recovery device for a fresh air machine according to claim 5, wherein: the filter comprises a porous framework and textile fiber yarns wound on the porous framework.

7. The heat recovery device for a fresh air machine according to claim 6, wherein: the pipe is arranged in an inclined manner, and the end of the pipe close to the condensate collector is higher than the end of the pipe close to the exhaust air condenser.

8. The heat recovery device for a fresh air machine according to claim 7, wherein: the spray head comprises a plurality of spray heads, and the plurality of spray heads are uniformly distributed above the exhaust air condenser.

9. The heat recovery device for a fresh air machine according to any one of claims 1-4, wherein: an insulation layer is arranged outside the pipe.

10. The heat recovery device for a fresh air machine according to any one of claims 1-4, wherein: a waste water collector is arranged below the exhaust air condenser.

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