Dual heat recovery device of all fresh air air conditioning system

Abstract

The utility model discloses a dual-heat recovery device of a full fresh air air conditioning system. The dual-heat recovery device comprises a case, a heat exchanger and a heat exchanger, wherein a fresh air opening, a recovery air inlet and an air outlet are formed in the case; a cold water coil pipe, a hot water coil pipe and a draught fan unit are sequentially arranged in the machine box, and the fresh air opening and the recycling air inlet are located in the same side of the cold water coil pipe. The heat pipe is provided with a first section and a second section which are arranged on the two sides of the cold water coil pipe and communicated with each other, and the heat pipe is filled with a refrigerant; the workshop air conditioner can solve the problems that energy is wasted and production cost is increased due to the fact that a traditional workshop air conditioner does not have the function of recycling heat contained in indoor exhaust airflow.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, and in particular to a dual heat recovery device for a fresh air air conditioning system. Background Art

[0002] The production of products such as antibodies or fusion proteins has the characteristics of long production cycle, large production investment, and co-production of multiple products. Therefore, a fresh air air-conditioning system is needed to maintain a clean environment in the workshop (to ensure temperature and humidity, ventilation frequency, suspended particles, etc.). Since the indoor temperature needs to be controlled all year round, the air-conditioning consumes a lot of energy. Traditional air-conditioning does not have the function of recovering the heat contained in the indoor exhaust air flow, and cannot recover the cold on the surface of the cold water coil, resulting in energy waste and increased production costs. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a dual heat recovery device for a fresh air air conditioning system.

[0004] In order to achieve the above objectives, the technical solution adopted by the utility model includes:

[0005] A chassis, wherein a fresh air inlet, a recovery air inlet and an air outlet are formed on the chassis; a cold water coil, a hot water coil and a fan unit are sequentially arranged in the chassis, wherein the fresh air inlet and the recovery air inlet are located on the same side of the cold water coil;

[0006] The heat pipe comprises a first section and a second section which are arranged on both sides of the cold water coil and are connected to each other, and the heat pipe is filled with a refrigerant.

[0007] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air conditioning system, a first filter is installed between the fresh air inlet, the recovery air inlet and the first section of the heat pipe.

[0008] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air conditioning system, a second filter is installed between the fan unit and the air outlet.

[0009] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air conditioning system, a dry steam humidification pipe is arranged between the hot water coil and the fan unit.

[0010] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air-conditioning system, it also includes a hot air unit, which is used to transport fresh air to the fresh air outlet and can divert the recovered air flow discharged from the outlet to the recovery air inlet.

[0011] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air conditioning system, a heat-insulating layer is arranged outside the pipeline for recovering the airflow discharged from the air outlet.

[0012] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air conditioning system, the fan unit is installed in the chassis through elastic parts.

[0013] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air-conditioning system, the elastic member is a coil spring or an air spring.

[0014] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air conditioning system, a polytetrafluoroethylene coating is sprayed on the surface of the cold water coil.

[0015] In the preferred technical solution of the dual heat recovery device of the above-mentioned fresh air air-conditioning system, the recovery air inlet is configured to face the fresh air inlet.

[0016] The beneficial effect of the utility model is that by recycling and offsetting the fresh air and the air flow at normal temperature of the workshop, the heat contained in the air flow of the workshop can be effectively recycled for secondary utilization. At the same time, the cold water coil is used to pre-cool the incoming air, enhance the dehumidification capacity of the system, preheat the supply air, and reduce the reheating energy consumption of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the utility model for delivering fresh air to a workshop;

[0018] Figure 2 is a first schematic diagram of the interior of the chassis;

[0019] Figure 3 is a second schematic diagram of the interior of the chassis;

[0020] Figure 4 It is the position relationship diagram of the heat pipe and the cold water coil;

[0021] In the figure: chassis 1, fresh air inlet 11, recovery air inlet 12, air outlet 13, cold water coil 2, hot water coil 3, fan unit 4, heat pipe 5, first section 51, second section 52, first filter 6, second filter 7, dry steam humidification pipe 8, hot air unit 9, elastic member 10. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0023] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figures 1 to 4 As shown, the dual heat recovery device of the fresh air air conditioning system of the utility model includes: a chassis 1, on which a fresh air inlet 11, a recovery air inlet 12 and an air outlet 13 are formed; a cold water coil 2, a hot water coil 3 and a fan unit 4 are sequentially arranged in the chassis 1, wherein the fresh air inlet 11 and the recovery air inlet 12 are located on the same side of the cold water coil 2; a heat pipe 5, having a first section 51 and a second section 52 arranged on both sides of the cold water coil 2 and connected, and the heat pipe 5 is filled with refrigerant.

[0026] See also Figure 2 The fresh air inlet 11 and the recovery air inlet 12 opened on the chassis 1 are located on the same side. The fresh air inlet 11 is used for external fresh air to enter the chassis 1. The recovery air inlet 12 is connected to the workshop through a pipeline and is used to recover the normal temperature airflow discharged from the workshop through the air outlet 13; the air outlet 13 is located at the other end of the chassis 1 relative to the fresh air inlet 11 and the recovery air inlet 12, and the air outlet 13 is connected to various areas of the workshop through pipelines.

[0027] See also Figure 3 Chilled water is passed into the cold water coil 2 to cool the airflow entering through the fresh air inlet 11 and the recovery air inlet 12; hot water is passed into the hot water coil 3 to heat and keep the cooled airflow warm.

[0028] See also Figure 4 The heat pipe 5 has a U-shaped structure. The first section 51 and the second section 52 of the heat pipe 5 form a connected U-shaped circulation loop. A refrigerant is introduced into the heat pipe 5, and the refrigerant can be Freon. The first section 51 and the second section 52 of the heat pipe 5 are respectively located on both sides of the cold water coil 2, thereby forming a semi-enclosure of the cold water coil 2.

[0029] During operation, the external fresh air and the workshop normal temperature air flow enter the chassis 1 through the fresh air vent 11 and the recovery air inlet 12 respectively. In summer, since the fresh air temperature is higher than the workshop air flow temperature, the workshop normal temperature air flow can cool the external fresh air for the first time, thereby realizing the first recovery and utilization of heat energy. After that, the air flow blows to the first section 51 of the heat pipe 5, and the refrigerant in the first section 51 of the heat pipe 5 is preheated and evaporated. The refrigerant moves from the gaseous state to the second section 52 of the heat pipe 5, thereby realizing the precooling of the air flow at the first section 51. The air flow is further cooled after passing through the cold water coil 2. When the air flow moves to the second section 52 of the heat pipe 5, the air flow is preheated by the second section 52 of the heat pipe 5. Thereafter, the air flow is heated to a predetermined temperature through the hot water coil 3 and transported to the workshop through the air outlet 13.

[0030] For example, in summer, the fresh air temperature is 35°C, the workshop air flow temperature is 20-22°C, and after convergence, the air flow temperature is 27°C. The temperature after precooling by the first section 51 of the heat pipe 5 is 19°C, and the air flow temperature after further cooling by the cold water coil 2 is 12°C. The temperature after preheating by the second section 52 of the heat pipe 5 is 18°C, and the air flow temperature after passing through the hot water coil 3 is 20-22°C.

[0031] In winter, the high-temperature airflow in the workshop releases heat to the external cold airflow to preheat the cold airflow. After undergoing the above heat exchange process and being heated by the hot water coil 3, the hot airflow is blown out through the air outlet 13.

[0032] Through this arrangement, the heat contained in the workshop air flow can be effectively recycled and utilized for a second time. At the same time, the cold water coil 2 is used to pre-cool the incoming air, enhance the system's dehumidification capacity, preheat the supply air, and reduce the air conditioning reheating energy consumption. In addition, the first section 51 and the second section 52 of the heat pipe 5 do not need to consume external energy. Only the cold water coil 2 needs to consume a small amount of external chilled water, which effectively reduces the company's production costs.

[0033] In other possible implementations, the cold water coil 2 may also be replaced by a surface cooler.

[0034] In one or more embodiments, a first filter 6 is installed between the fresh air inlet 11 , the recovery air inlet 12 and the first section 51 of the heat pipe 5 .

[0035] See also Figure 2 , Figure 3 The first filter 6 is an F7 medium-efficiency bag filter, which is used to filter larger particles such as dust and hair in the air to achieve the primary effect of air purification.

[0036] In one or more embodiments, a second filter 7 is installed between the fan unit 4 and the air outlet 13 .

[0037] See also Figure 2 , Figure 3 The second filter 7 is an F9 medium-efficiency bag filter, which is used to filter particulate matter such as dust, smoke, bacteria, viruses, etc. in the air to improve the quality and cleanliness of the air.

[0038] In one or more embodiments, a dry steam humidification pipe 8 is arranged between the hot water coil 3 and the fan unit 4 .

[0039] See also Figure 2 , Figure 3 The dry steam humidifying pipe 8 increases the humidity of the constant temperature airflow by spraying dry steam, and at the same time can filter out particulate matter such as bacteria and viruses in the constant temperature airflow, thereby improving the quality of the constant temperature airflow discharged to the workshop.

[0040] In one or more embodiments, a hot air unit 9 is further included, which is used to deliver fresh air to the fresh air inlet 11 and can divert part of the airflow discharged from its recovered air outlet 13 to the recovered air inlet 12.

[0041] See also Figure 1 The hot air unit 9 can discharge part of the normal temperature airflow of the workshop to the outside through the pipeline, and discharge part into the chassis 1, and at the same time can discharge the external fresh air into the chassis 1 through the fresh air outlet 11. The hot air unit 9 is generally composed of a blower, a control system and other structures.

[0042] In one or more embodiments, a heat-insulating layer is disposed outside the pipeline for recovering the airflow discharged from the air outlet 13 .

[0043] It is understandable that the insulation layer can be insulation cotton. By covering the pipe between the workshop and the recovery air inlet 12 of the chassis 1 with the insulation layer, the problem of temperature loss of the workshop's normal temperature airflow during transportation can be reduced, the recovery rate of the workshop's normal temperature airflow containing temperature can be improved, and the company's production costs can be reduced.

[0044] In one or more embodiments, the fan unit 4 is installed in the chassis 1 through the elastic member 10. This arrangement can effectively reduce the noise generated by the fan unit 4. The fan unit 4 can be a blower.

[0045] In one or more embodiments, the elastic member 10 is a coil spring or an air spring.

[0046] In one or more embodiments, a polytetrafluoroethylene coating is sprayed on the surface of the cold water coil 2. Polytetrafluoroethylene has a certain self-lubricating effect. When water droplets condense on the surface of the cold water coil 2, the water droplets can quickly flow on the surface of the cold water coil 2 to avoid the accumulation of water droplets affecting the cooling of the fresh air.

[0047] In one or more embodiments, the recovery air inlet 12 is configured to face the fresh air inlet 11. Through this arrangement, the workshop normal temperature airflow blown in through the recovery air inlet 12 and the fresh air can be hedged to improve the heat exchange efficiency.

[0048] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual heat recovery device for a fresh air air conditioning system, characterized in that: include: A chassis, wherein a fresh air inlet, a recovery air inlet and an air outlet are formed on the chassis; a cold water coil, a hot water coil and a fan unit are sequentially arranged in the chassis, wherein the fresh air inlet and the recovery air inlet are located on the same side of the cold water coil; The heat pipe comprises a first section and a second section which are arranged on both sides of the cold water coil and are connected to each other, and the heat pipe is filled with a refrigerant.

2. The dual heat recovery device of the fresh air air conditioning system according to claim 1 is characterized in that: A first filter is installed between the fresh air inlet, the recovery air inlet and the first section of the heat pipe.

3. The dual heat recovery device of the fresh air air conditioning system according to claim 1 is characterized in that: A second filter is installed between the fan unit and the air outlet.

4. The dual heat recovery device of the fresh air air conditioning system according to claim 1 is characterized in that: A dry steam humidifying pipe is arranged between the hot water coil and the fan unit.

5. The dual heat recovery device of the fresh air air conditioning system according to any one of claims 1 to 4, characterized in that: It also includes a hot air unit, which is used to transport fresh air to the fresh air outlet and can divert the recovered air flow discharged from the air outlet to the recovery air inlet.

6. The dual heat recovery device of the fresh air air conditioning system according to claim 5, characterized in that: A heat-insulating layer is arranged outside the pipeline for recovering the airflow discharged from the air outlet.

7. The dual heat recovery device of the fresh air air conditioning system according to claim 1, characterized in that: The fan unit is installed in the chassis through an elastic member.

8. The dual heat recovery device of the fresh air air conditioning system according to claim 7, characterized in that: The elastic member is a coil spring or an air spring.

9. The dual heat recovery device of the fresh air air conditioning system according to claim 1, characterized in that: The surface of the cold water coil is sprayed with a polytetrafluoroethylene coating.

10. The dual heat recovery device of the fresh air air conditioning system according to claim 1, characterized in that: The recovery air inlet is configured to face the fresh air inlet.

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