Fresh air circulating device of clean workshop air conditioning system

Abstract

The utility model relates to a fresh air circulating device of a clean workshop air conditioning system, which comprises a pipeline structure, an FFU (fan filter unit), a sensor assembly, a plurality of electric valves and a circuit board assembly, the pipeline structure comprises a communicating pipe and is provided with an air inlet allowing outdoor air to enter, a tail gas inlet allowing tail gas treated by the tail gas treatment tower to enter, a tail gas outlet allowing the tail gas to be discharged and a main air outlet, and the tail gas inlet and the main air outlet are communicated through the communicating pipe; an air inlet of the FFU is communicated with the main air outlet; the sensor assembly is arranged at the tail gas inlet and used for detecting the air speed, the tail gas humidity, the temperature and the dust concentration at the tail gas inlet. The plurality of electric valves comprise a first electric valve arranged at the tail gas outlet, a second electric valve arranged in the middle of the communicating pipe and a third electric valve arranged at the air inlet; the circuit board assembly is electrically connected with the sensor assembly and the electric valves. The air conditioning system solves the problem that an existing air conditioning system is large in energy consumption.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber preform clean workshop technical field, specifically related to a clean workshop air conditioning system's fresh air circulation device. BACKGROUND

[0002] Optical fiber preform has higher requirements to the cleanness, temperature and humidity of production environment in the production process, and the air conditioning system provides clean air with proper temperature and humidity for the clean workshop required by optical fiber preform, in order to maintain the cleanness of clean workshop, the clean workshop needs to keep the outdoor continuous positive pressure, and this function is realized through the fresh air supply unit FFU of air conditioning system.

[0003] Because a large amount of dust and moisture are contained in outdoor air, a large amount of air conditioning filter is needed to filter dust in air, the cold water coil consumes chilled water to remove excess moisture in air, and the hot water coil adjusts air temperature, so that the energy consumption is large. UTILITARY MODEL

[0004] Based on the above description, the utility model provides a fresh air circulation device of clean workshop air conditioning system to solve the problem of large energy consumption of the existing air conditioning system.

[0005] The technical scheme for solving the above technical problem is as follows:

[0006] A fresh air circulation device of clean workshop air conditioning system, comprising:

[0007] A pipeline structure comprising a communication pipe and having an air inlet for outdoor air, a tail gas inlet for tail gas treated by a tail gas treatment tower, a tail gas outlet for tail gas, and a total air outlet, wherein the tail gas inlet and the total air outlet are communicated through the communication pipe;

[0008] An FFU air supply unit, the air inlet of which is communicated with the total air outlet;

[0009] A sensor assembly arranged at the tail gas inlet and used for detecting the wind speed, tail gas humidity, temperature and dust concentration at the tail gas inlet; and

[0010] A plurality of electric valves, including a first electric valve arranged at the tail gas outlet, a second electric valve arranged at the middle part of the communication pipe, and a third electric valve arranged at the air inlet; and

[0011] A circuit board assembly is electrically connected with the sensor assembly and the plurality of electric valves.

[0012] On the basis of the above technical solutions, the utility model further can make improvement as follows:

[0013] Further, the pipeline assembly further comprises:

[0014] A tail gas pipe, two ends of which respectively constitute the tail gas air inlet and the tail gas air outlet, and a middle part of the tail gas pipe is connected to one end of the communication pipe; and

[0015] An air inlet pipe, one end of the air inlet pipe is connected to the middle part of the communication pipe, and the other end of the air inlet pipe constitutes the total air outlet;

[0016] The other end of the communication pipe constitutes the air inlet;

[0017] The second electric valve is located between the tail gas pipe and the air inlet pipe.

[0018] Further, the sensor assembly is arranged in the tail gas pipe and is arranged close to the tail gas air inlet, the sensor assembly comprises a first sensor group and a wind speed sensor, and the first sensor group is used for detecting the tail gas humidity, temperature and dust concentration at the tail gas air inlet.

[0019] Further, the first sensor group and the wind speed sensor are spaced apart along the flow direction of the tail gas, and the first sensor group is arranged close to the tail gas air inlet.

[0020] Further, the pipeline structure further comprises a filter pipe, a filter core is arranged in the filter pipe, one end of the filter pipe is connected to the tail gas pipe, the other end of the filter pipe is connected to the air inlet pipe, and the filter pipe is arranged close to the sensor assembly;

[0021] The plurality of electric valves further comprise a fourth electric valve arranged in the filter pipe and located between the filter core and the tail gas pipe, and the fourth electric valve is electrically connected with the circuit board assembly.

[0022] Further, the filter pipe comprises:

[0023] At least two first pipe sections, the two first pipe sections are coaxially arranged and are respectively connected to the tail gas pipe and the air inlet pipe, and close ends of the two first pipe sections are formed with threaded holes, and the threaded holes are oppositely arranged in terms of the threaded rotation direction; and

[0024] At least one second pipe section, two ends of the second pipe section are respectively screwed to the threaded holes;

[0025] The filter core is arranged in the second pipe section.

[0026] Further, the total air outlet is also provided with a second sensor group, which is electrically connected with the circuit board assembly and used for detecting the tail gas humidity, temperature and dust concentration at the total air outlet.

[0027] Further, the fresh air circulation device of the clean workshop air conditioning system further comprises an AHU air supply unit, an air inlet of the AHU air supply unit is communicated with an air outlet of the FFU air supply unit, and an air outlet of the AHU air supply unit is used for being communicated with the clean workshop.

[0028] Compared with the prior art, the technical scheme has the following beneficial technical effects:

[0029] When the sensor assembly detects that the temperature, humidity and dust concentration of the tail gas entering from the tail gas air inlet are within the set range, the tail gas is qualified tail gas, so the second electric valve is opened, and the first electric valve and the third electric valve are closed, so that the qualified tail gas enters the FFU air supply unit through the total air inlet. Since the tail gas discharged from the tail gas treatment tower has less dust content and a temperature close to that of the clean workshop, a large amount of air conditioner and air conditioning system cold and hot water consumption can be saved, thereby reducing cost and saving energy.

[0030] On the contrary, when the sensor assembly detects that no tail gas is discharged from the tail gas air inlet, or at least one of the temperature and dust concentration of the entering tail gas is outside the set range, the tail gas is unqualified tail gas, so the first electric valve and the third electric valve are opened, and the second electric valve is closed, so that the unqualified tail gas is discharged from the tail gas air outlet, the outdoor air enters from the air inlet, and the FFU air supply unit enters from the total air inlet, thereby ensuring the cleanliness of the clean workshop. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A structure diagram of the fresh air circulation device of the clean workshop air conditioning system is provided for the embodiments of the utility model.

[0032] In the drawings, the components represented by each reference numeral are listed as follows:

[0033] 1, pipe structure; 11, communication pipe; 111, air inlet; 12, tail gas pipe; 121, tail gas air inlet; 122, tail gas air outlet; 13, air inlet pipe; 131, total air outlet; 14, filter pipe; 141, first pipe section; 142, second pipe section; 2, FFU air supply unit; 3, sensor assembly; 31, first sensor group; 32, air speed sensor; 41, first electric valve; 42, second electric valve; 43, third electric valve; 44, fourth electric valve; 6, second sensor group; 7, AHU air supply unit; a, waste gas treatment tower. DETAILED DESCRIPTION

[0034] For the purposes of this application, a more complete description of the application will be presented with reference to the associated drawings. Embodiments of the application are illustrated in the drawings. However, the application can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0036] It is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described herein is oriented in an orientation that is opposite to the orientation shown in a particular figure, a spatially relative term that can have been used to describe a particular feature in connection with the particular figure will be understood to refer to that feature also in the opposite orientation. Therefore, the explicit use of the spatially relative terms in the description above should not be interpreted to limit the scope or application of the application. Rather, the spatially relative terms are used only to facilitate the understanding of the present application.

[0037] It is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described herein is oriented in an orientation that is opposite to the orientation shown in a particular figure, a spatially relative term that can have been used to describe a particular feature in connection with the particular figure will be understood to refer to that feature also in the opposite orientation. Therefore, the explicit use of the spatially relative terms in the description above should not be interpreted to limit the scope or application of the application. Rather, the spatially relative terms are used only to facilitate the understanding of the present application.

[0038] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the terms "comprise / comprises" or "include / includes" or "have / have" when used in this specification, specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0039] Reference will now be made to Figure 1The utility model provides a kind of fresh air circulation device of clean workshop air conditioning system, including pipeline structure 1, FFU air supply unit 2, sensor component 3, multiple electric valves and circuit board component, the pipeline structure 1 includes communication pipe 11, and has air inlet 111 for outdoor air to enter, tail gas inlet 121 for the tail gas after being handled by tail gas treatment tower a to enter, tail gas outlet 122 for tail gas to be discharged, and total air outlet 131, the tail gas inlet 121, tail gas outlet 122, air inlet 111 and total air outlet 131 are communicated by communication pipe 11;The air inlet of the FFU air supply unit 2 is communicated with the total air outlet 131;The sensor component 3 is located at the tail gas inlet 121, for detecting the wind speed, tail gas humidity, temperature and dust concentration at the tail gas inlet 121;Multiple electric valves include first electric valve 41 located at the tail gas outlet 122, second electric valve 42 located at the middle part of the communication pipe 11 and third electric valve 43 located at the air inlet 111;The circuit board component is electrically connected with the sensor component 3 and multiple electric valves.

[0040] When the sensor component 3 detects that the temperature, humidity and dust concentration of tail gas discharged from the tail gas inlet 121 and entered are all within the set range value, the tail gas is qualified tail gas, so the second electric valve 42 is opened, and the first electric valve 41 and third electric valve 43 are closed, so that the qualified tail gas enters the FFU air supply unit 2 through the total air outlet 131. Since the dust content in the tail gas discharged through the tail gas treatment tower a is less, and the temperature is close to the clean workshop, a large amount of air conditioner, air conditioning system cold and hot water consumption can be saved, thereby reducing cost and saving energy.

[0041] On the contrary, when the sensor component 3 detects that no tail gas is discharged from the tail gas inlet 121, or at least one of the temperature and dust concentration of the tail gas entered is outside the set range value, the tail gas is unqualified tail gas, so the first electric valve 41 and third electric valve 43 are opened, and the second electric valve 42 is closed, so that the unqualified tail gas is discharged from the tail gas outlet, the outdoor air enters from the air inlet 111, and the FFU air supply unit 2 enters from the total air outlet 131, to ensure the cleanliness of the clean workshop.

[0042] In the present invention, the specific structure of the duct assembly is not limited, as long as it can achieve communication between the exhaust gas inlet 121 and the total air outlet 131 via the connecting pipe 11. Specifically, the duct assembly also includes an exhaust pipe 12 and an intake pipe 13. The ends of the exhaust pipe 12 respectively constitute the exhaust gas inlet 121 and the exhaust gas outlet 122. The middle portion of the exhaust pipe 12 is connected to one end of the connecting pipe 11; one end of the intake pipe 13 is connected to the middle portion of the connecting pipe 11, and the other end of the intake pipe 13 constitutes the total air outlet 131; the other end of the connecting pipe 11 constitutes the air inlet 111; and the second electric valve 42 is located between the exhaust pipe 12 and the intake pipe 13. This provides a simple structure and convenient installation.

[0043] More specifically, in this embodiment, the sensor assembly 3 is arranged in the exhaust pipe 12 and close to the exhaust air inlet 121. The sensor assembly 3 includes a first sensor group 31 and a wind speed sensor 32. The first sensor group 31 is used to detect the exhaust humidity, temperature and dust concentration at the exhaust air inlet 121. The wind speed sensor 32 is used to detect whether the exhaust air outlet 122 is discharging exhaust gas. The first sensor group 31 is configured as an SX-M real-time multi-point clean environment detection system, which can monitor the temperature, humidity and air cleanliness at the exhaust air inlet 121, wherein the temperature range is 23°C ± 8, the humidity range is less than 80%; the cleanliness range is less than 30,000 / m 3 The content of 0.5um particles in the air.

[0044] Furthermore, in this embodiment, the first sensor group 31 and the wind speed sensor 32 are spaced apart along the exhaust gas flow direction, and the first sensor group 31 is disposed near the exhaust gas inlet 121. This enables more accurate detection of the humidity, temperature, and cleanliness at the exhaust gas inlet 121.

[0045] In this embodiment, the pipeline structure 1 also includes a filter tube 14, a filter element is provided in the filter tube 14, one end of the filter tube 14 is connected to the exhaust pipe 12, and the other end is connected to the intake pipe 13, and the filter tube 14 is arranged close to the sensor assembly 3; the multiple electric valves also include a fourth electric valve 44 provided in the filter tube 14 and located between the filter element and the exhaust pipe 12, and the fourth electric valve 44 is electrically connected to the circuit board assembly.

[0046] It should be noted that the gas discharged from the exhaust treatment tower a has a low dust content and is mostly indoor air from a clean room, thus having a temperature close to that of a clean room. When the humidity of the exhaust gas entering the exhaust inlet 121 is greater than or equal to 80% and less than 85%, and the cleanliness and temperature are within the set range, the first electric valve 41, the second electric valve 42, and the third electric valve 43 are closed, and the fourth electric valve 44 is opened, allowing the exhaust gas to pass through the filter tube 14 and the filter element, reducing the exhaust gas humidity, thereby improving exhaust gas utilization and further reducing the consumption of air conditioning system filters and hot and cold water.

[0047] To facilitate filter element replacement, in this embodiment, the filter tube 14 includes at least two first tube sections 141 and at least one second tube section 142. The two first tube sections 141 are coaxially arranged and connected to the exhaust pipe 12 and the intake pipe 13, respectively. Threaded holes are formed at the adjacent ends of the two first tube sections 141, with the threads of the two threaded holes rotating in opposite directions. The two ends of the second tube section 142 are screwed to the two threaded holes, respectively. The filter element is installed within the second tube section 142. Thus, by rotating the second tube section 142, the two first tube sections 141 can be moved toward or away from each other relative to the second tube section 142. Furthermore, the second tube section 142 can be removed or installed by rotating the second tube section 142, facilitating filter element replacement. This facilitates disassembly and operation.

[0048] It should be noted that, in this embodiment, during the disassembly and installation of the second pipe section 142, there is interference with the two first pipe sections 141, and the exhaust pipe 12 and the connecting pipe are configured as flexible pipes or plastic pipes with a certain elasticity, which does not affect the installation or disassembly of the second pipe section 142.

[0049] In addition, the number of the first pipe sections 141 and the second pipe sections 142 is not limited, as long as the number of the first pipe sections 141 is always one more than the number of the second pipe sections 141 , and the exhaust pipe 12 and the intake pipe 13 are always directly connected to the corresponding first pipe sections 141 .

[0050] In this embodiment, the type of the filter element is not limited, and it can be at least one of filter cloth, sponge and activated carbon. It is easy to set up and has low cost.

[0051] In this embodiment, a second sensor group 6 is also provided at the main air outlet 131. The second sensor group 6 is used to detect exhaust humidity, temperature, and dust concentration at the main air outlet 131. The second sensor group 6 is connected to the circuit board assembly and is configured as an SX-M real-time multi-point clean environment detection system. This second sensor group 6 can serve as a backup and can also re-detect exhaust entering the main air outlet 131. The exhaust humidity can be used to determine whether the filter element needs to be replaced.

[0052] In this embodiment, a fresh air circulation device of a clean workshop air conditioning system further includes an AHU air supply unit 7, the air inlet of the AHU air supply unit 7 is connected to the air outlet of the FFU air supply unit 2, and the air outlet of the AHU air supply unit 7 is used to connect to the clean workshop. The FFU air supply unit 2 (Fan Filter Unit) is an air filter system with its own fan. The AHU air supply unit 7 (Air handling unit, is a centralized air handling system, a forced hot air heating and ventilation system that distributes heated air through air ducts. The basic centralized system is a full-air single-zone system, generally including fans, heaters, coolers and filter components. The fresh air delivered by the AHU air supply unit 7 is mixed with a portion of the return air in the room, and then filtered out harmful substances such as dust, smoke, black smoke and organic particles in the air through the filter.

[0053] A method for controlling a fresh air circulation device of a clean room air conditioning system includes:

[0054] If the wind speed, temperature, humidity and dust concentration are all within the first setting range, the first electric valve, the third electric valve and the fourth electric valve are controlled to be closed, and the second electric valve is opened; if at least one of the wind speed, temperature and dust concentration is outside the first setting range, the first electric valve and the third electric valve are controlled to be opened, and the second electric valve and the fourth electric valve are closed; if the wind speed, temperature and dust concentration are all within the first setting range, and the humidity is outside the first setting range and within the second setting range, the first electric valve, the second electric valve and the third electric valve are controlled to be closed, and the fourth electric valve is opened.

[0055] In this embodiment, the wind speed is used to detect whether there is exhaust gas discharged from the exhaust inlet. The first setting range is: temperature range 23℃±8, humidity range less than 80%; cleanliness range less than 30000 / m 3 The second setting range is the humidity range greater than or equal to 80% and less than 85%.

[0056] When it is detected that the exhaust gas enters the exhaust gas inlet and the temperature, humidity and dust concentration are all within the first set range, the first electric valve, the third electric valve and the fourth electric valve are closed, and the second electric valve is opened to allow qualified exhaust gas to enter the FFU air supply unit.

[0057] When it is detected that the exhaust gas enters the exhaust gas inlet, and the temperature and dust concentration are both within the first set range, and the humidity is within the second set range, the first electric valve, the second electric valve and the third electric valve are closed, and the fourth electric valve is opened, so that the exhaust gas enters the filter tube for filtration and enters the FFU air supply unit after reducing the humidity.

[0058] When it is detected that there is no exhaust gas or the flow rate is extremely low and close to zero, or at least one of the temperature and dust concentration exceeds the first set range, or the humidity exceeds the second range, the first and third electric valves are opened, and the second and fourth electric valves are closed, allowing the exhaust gas to be discharged to the outside through the exhaust pipe and the exhaust outlet, and the outdoor air to enter the FFU air supply unit through the air inlet and the intake pipe. In this way, the multiple electric valves can be selectively opened and closed, fully utilizing the exhaust gas, reasonably saving the energy of the air conditioning system, and ensuring the cleanliness of the clean room.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fresh air circulation device for a clean workshop air conditioning system, characterized in that: include: The pipeline structure includes a connecting pipe and has an air inlet for allowing outdoor air to enter, an exhaust gas inlet for allowing exhaust gas treated by the exhaust gas treatment tower to enter, an exhaust gas outlet for allowing exhaust gas to be discharged, and a main air outlet, wherein the exhaust gas inlet and the main air outlet are connected by the connecting pipe; FFU air supply unit, whose air inlet is connected to the main air outlet; A sensor assembly is provided at the exhaust air inlet, and is used to detect wind speed, exhaust humidity, temperature and dust concentration at the exhaust air inlet; a plurality of electric valves, including a first electric valve provided at the exhaust gas outlet, a second electric valve provided at the middle of the connecting pipe, and a third electric valve provided at the air inlet; as well as, A circuit board assembly is electrically connected to the sensor assembly and the plurality of electric valves.

2. The fresh air circulation device of the clean room air conditioning system according to claim 1, characterized in that: The pipeline assembly further comprises: An exhaust pipe, the two ends of which respectively constitute the exhaust gas inlet and the exhaust gas outlet, and the middle portion of the exhaust pipe is connected to one end of the connecting pipe; and an air intake pipe, one end of which is connected to the middle portion of the connecting pipe, and the other end of which constitutes the main air outlet; The other end of the communicating tube constitutes the air inlet; The second electric valve is located between the exhaust pipe and the intake pipe.

3. The fresh air circulation device of the clean room air conditioning system according to claim 2, characterized in that: The sensor assembly is arranged in the exhaust pipe and close to the exhaust air inlet. The sensor assembly includes a first sensor group and a wind speed sensor. The first sensor group is used to detect the exhaust humidity, temperature and dust concentration at the exhaust air inlet.

4. The fresh air circulation device of the clean room air conditioning system according to claim 3, characterized in that: The first sensor group and the wind speed sensor are distributed at intervals along the flow direction of the exhaust gas, and the first sensor group is arranged close to the exhaust gas inlet.

5. The fresh air circulation device of the clean room air conditioning system according to claim 2, characterized in that: The pipeline structure further includes a filter tube, wherein a filter element is provided in the filter tube, one end of the filter tube is connected to the exhaust pipe, and the other end is connected to the intake pipe, and the filter tube is arranged close to the sensor assembly; The plurality of electric valves further include a fourth electric valve disposed in the filter tube and located between the filter element and the exhaust pipe, and the fourth electric valve is electrically connected to the circuit board assembly.

6. The fresh air circulation device of the clean room air conditioning system according to claim 5, characterized in that: The filter tube comprises: At least two first pipe sections, the two first pipe sections are coaxially arranged and respectively connected to the exhaust pipe and the intake pipe, and threaded holes are formed at adjacent ends of the two first pipe sections, and the threads of the two threaded holes are arranged in opposite directions; and at least one second pipe segment, wherein two ends of the second pipe segment are respectively screwed to the two threaded holes; The filter element is installed in the second pipe section.

7. The fresh air circulation device of the clean room air conditioning system according to claim 1, characterized in that: A second sensor group is also provided at the main air outlet. The second sensor group is electrically connected to the circuit board assembly and is used to detect the exhaust humidity, temperature and dust concentration at the main air outlet.

8. The fresh air circulation device of the clean room air conditioning system according to claim 1, characterized in that: A fresh air circulation device of a clean workshop air conditioning system also includes an AHU air supply unit, the air inlet of the AHU air supply unit is connected to the air outlet of the FFU air supply unit, and the air outlet of the AHU air supply unit is used to communicate with the clean workshop.

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