Culture apparatus

Abstract

To provide a culture apparatus that can suppress leakage of fine particles generated in a culture apparatus to an outer space while suppressing entry of foreign matters such as fine particles from an outer space into a culture chamber.SOLUTION: A culture apparatus comprises: an inner box having a culture chamber; an openable / closable inner door which covers an opening of the culture chamber; an openable / closable outer door which covers the inner door from outside; a cover part which forms a housing space around the inner box; and a cleaning device which is provided for the housing space, and blows out clean air obtained by filtering air in the housing space to the outside, where the cleaning device sucks outer air into the housing space from the outside, and blows out clean air downward in front of and above the inner door.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a culture device. [Background technology]

[0002] Conventionally, there is known a culture device as disclosed in Patent Document 1. Such a culture device has a box part having a culture chamber. Also, the culture device has a door part for opening and closing the opening of the box part.

[0003] The culture apparatus further includes devices constituting the culture apparatus and wiring connected to the devices, and the devices and wiring are disposed in a storage space formed on the outside of the box portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-227942 Summary of the Invention [Problem to be solved by the invention]

[0005] When the above-mentioned culture apparatus is in operation, if the door is opened, foreign matter such as fine particles may enter the culture chamber from the external space.

[0006] In addition, when the above-mentioned culture apparatus is in operation, fine particles generated from the device or the heat insulating material contained in the accommodation space may leak from the accommodation space to the outside space. If the culture apparatus is used in a so-called clean room, such leakage of fine particles may contaminate the clean room.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a culture device that can prevent foreign matter such as fine particles from entering the culture chamber from the external space, while preventing fine particles generated within the culture device from leaking into the external space. [Means for solving the problem]

[0008] One aspect of the culture device according to the present invention is an inner box having a culture chamber; An openable inner door that covers the opening of the culture chamber; An openable outer door that covers the inner door from the outside; A cover portion that forms a storage space around the inner box; A cleaning device is provided in the storage space and blows out clean air obtained by filtering the air in the storage space to the outside. The cleaning device is It draws in outside air into the containment space, Clean air is blown downward from a position in front of and above the inner door. Effect of the Invention

[0009] According to the present invention, a culture apparatus can be provided that can suppress the intrusion of foreign matter such as fine particles from the external space into a culture chamber, while suppressing the leakage of fine particles generated within the culture apparatus into the external space. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a culture device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of the incubation device with the outer door closed. [Diagram 3] FIG. 3 is a cross-sectional view of the incubation device with the outer door open. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the culture device according to the present invention will be described with reference to the drawings. Note that the same components are given the same reference numerals. The matters described below together with the accompanying drawings are for explaining exemplary embodiments, and are not intended to show the only embodiment.

[0012] [Embodiment] A culture device 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

[0013] Fig. 1 is a perspective view of a culture device 1 according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of the culture device 1 with an outer door 13 closed. Specifically, Fig. 2 is a cross-sectional view showing the culture device 1 with the outer door 13 closed, cut along line CC shown in Fig. 1.

[0014] Moreover, Fig. 3 is a cross-sectional view showing the culture device 1 with the outer door 13 open, cut along the line CC shown in Fig. 1. Note that in Fig. 3, the outer door 13 is omitted.

[0015] 1 to 3, the side that a user faces when in use is the front side (front side) of the culture device 1. Moreover, the side opposite to the front side (front side) of the culture device 1 is the rear side (rear side) of the culture device 1. Moreover, the left and right sides when a user views the culture device 1 from the front are the left and right sides of the culture device 1. Furthermore, the upper and lower sides when viewing the culture device 1 from the front are the upper side (top side) and lower side (bottom side) of the culture device 1.

[0016] The culture device 1 is a device for culturing cultures such as cells or microorganisms in a culture chamber 20 formed inside a substantially box-shaped housing 10. The culture chamber 20 is controlled by adjusting the temperature, humidity, O 2 , etc. so as to provide an appropriate atmosphere for culturing the cultures. 2 (Oxygen) concentration and CO 2 (Carbon dioxide) concentrations are maintained within appropriate ranges.

[0017] The culture device 1 has a housing 10, a heating unit 30, a control unit 40, a cover 50, and an air cleaning device 60.

[0018] As shown in FIG. 2, the housing 10 has an inner box 11, an outer box 12, an outer door 13, an inner door 14, and a front panel 15.

[0019] The inner box 11 corresponds to an example of a box portion and is approximately box-shaped. The inner box 11 has a culture chamber 20 inside. The inner box 11 has an opening 110 on the front side. The opening 110 is also an opening of the culture chamber 20. In other words, the inner box 11 and the culture chamber 20 are open to the front.

[0020] The inner box 11 has a left side wall portion (not shown), a right side wall portion (not shown), a rear side wall portion 11a, an upper side wall portion 11b, and a lower side wall portion 11c.

[0021] The outer box 12 is substantially box-shaped and covers the inner box 11 from the outside, except for the front surface (that is, the opening 110) and the front panel 15. The outer box 12 has a hole H for accommodating the motor portion of the circulation blower .

[0022] Hole H communicates the space between inner box 11 and outer box 12 in which insulating material 16 is held with storage space 500A in a state in which air can move. Therefore, the space between inner box 11 and outer box 12 in which insulating material 16 is held may be considered to be part of storage space 500A.

[0023] The inner box 11 is made up of a plurality of metal plates. The plates constituting the inner box 11 are joined together by welding. Therefore, the inner box 11 has an airtight structure.

[0024] The heat insulating material 16 is provided between the inner box 11 and the outer box 12. The heat insulating material 16 is composed of a plurality of plate-shaped heat insulating members bonded together with an adhesive, or a fiber-based heat insulating material that traps air between fibers to make it difficult for heat to be transmitted.

[0025] The outer door 13 and the inner door 14 open and close the opening 110. The outer door 13 corresponds to an example of an outer door portion, and covers the inner door 14 from the outside. The outer door 13 is supported by the outer box 12 in a rotatable state. The outer door 13 can be opened and closed.

[0026] The inner door 14 corresponds to an example of a door portion. The inner door 14 is supported by the inner box 11 in a rotatable state. The inner door 14 can be opened and closed. In other words, the culture chamber 20 can be opened and closed by the inner door 14.

[0027] A packing P is disposed on the outer edge of the rear side surface of the outer door 13. The packing P has a rectangular frame shape when viewed from the front. Note that the front view means that the culture device 1 is viewed from the front (front side).

[0028] A packing P3 is disposed at the open end of the inner box 11. The packing P3 is annular (specifically, rectangular frame-shaped). The packing P3 is disposed along the open end of the inner box 11. When the inner door 11 is closed, the edge of the inner door 11 compresses the packing P3, thereby sealing the culture chamber 20.

[0029] Further, the outer door 13 has a packing P2 on its lower surface. The packing P2 is provided over the entire length in the left-right direction of the lower part of the outer door 13. When the outer door 13 is in a closed state, the tip end (i.e., the lower end) of the packing P2 faces a front end of a lower cover part 501 (described later) with a small gap therebetween.

[0030] On the other hand, when the outer door 13 is in an open state, the packing P2 is far away from the front end portion of the lower cover portion 501.

[0031] In this manner, the packing P2 narrows the cross-sectional area of ​​a portion of the space (flow path) that communicates the external space 9 with the suction port 501a described below when the outer door 13 is in the closed state (the state shown in FIG. 2). In other words, the packing P2 narrows the entrance (suction port) of the reserve space 501d described below when the outer door 13 is in the closed state.

[0032] Therefore, when the outer door 13 is closed, the resistance (ventilation resistance) acting on the air sucked from the external space 9 into the storage space 500 is greater than the resistance (ventilation resistance) acting on the air sucked from the external space 9 into the storage space 500 when the outer door 13 is open.

[0033] As described above, the packing P2 is a member for reducing the amount of air drawn into the storage space 500 described below when the outer door 13 is in a closed state (as shown in FIG. 2) compared to the amount of air drawn into the storage space 500 when the outer door 13 is in an open state (as shown in FIG. 3). The amount of air drawn into the storage space 500 refers to the amount (volume) of air drawn into the storage space 500 per unit time (one minute).

[0034] In other words, the packing P2 is a member for reducing the amount of air flowing into a reserve space 501d (described later) when the outer door 13 is in a closed state (as shown in FIG. 2) compared to the amount of air flowing into the reserve space 501d when the outer door 13 is in an open state (as shown in FIG. 3). The amount of air flowing into the reserve space 501d means the amount (volume) of air flowing into the reserve space 501d per unit time (one minute).

[0035] The front plate 15 is disposed on the front surfaces of the inner box 11 and the outer box 12, and connects the inner box 11 and the outer box 12 at the periphery of the opening 110. The front plate 15 is a frame-shaped plate member having a substantially rectangular outer periphery, and connects the front end of the inner box 11 and the front end of the outer box 12 around the entire periphery of the opening 110.

[0036] Furthermore, the housing 10 has a first port 100 in its upper wall portion (a portion including the upper wall portion 11b of the inner box 11) that penetrates the upper wall portion in the vertical direction.

[0037] The first port 100 communicates between the culture chamber 20 and a filter arrangement space 500e described below. Specifically, the first port 100 communicates between the culture chamber 20 and a space downstream of a portion in the filter arrangement space 500e where the first filter 62 is arranged.

[0038] Furthermore, the space downstream of the portion in the filter arrangement space 500e where the first filter 62 is arranged is a space (i.e., a positive pressure space) that becomes positive pressure relative to the external space 9 in the driving state (first driving state and second driving state) of the air purifier 60 described below.

[0039] Moreover, the housing 10 has a second port 101 in the inner door 14. The second port 101 penetrates the inner door 14 in the front-rear direction (in other words, in the thickness direction of the inner door 14). The second port 101 communicates between the culture chamber 20 and a space in front of the inner door 14 (hereinafter referred to as "the space in front of the inner door 14").

[0040] In other words, the second port 101 communicates the incubation chamber 20 with a space outside the inner box 11 and other than a storage space 500 described below (that is, the space in front of the inner door 14).

[0041] The housing 10 has a cap 102 that is detachably attached to the second port 101. When the cap 102 is attached to the second port 101, the cap 102 closes the second port 101. When the cap 102 is removed from the second port 101, the second port 101 communicates between the culture chamber 20 and the space in front of the inner door 14.

[0042] A user of the culture device 1 can access the culture chamber 20 from the space in front of the inner door 14 by removing the cap 102 from the second port 101. The user can acquire air in the culture chamber 20 through the second port 101. The user can know the condition of the air in the culture chamber 20 by analyzing the acquired air.

[0043] The heating unit 30 heats the culture chamber 20. The operation of the heating unit 30 is controlled by a control unit 40 described later. The control unit 40 may control the operation of the heating unit 30 based on a detection value of a temperature sensor 24 in the culture chamber 20.

[0044] The heating unit 30 has a plurality of heaters 31, 32, 33, and 34. Each of the plurality of heaters 31, 32, 33, and 34 has a plate shape.

[0045] The heater 31 is provided on the upper surface of the upper wall portion 11b of the inner box 11. The heater 32 is provided on the lower surface of the lower wall portion 11c of the inner box 11. The heater 33 is provided on the rear side surface of the rear wall portion 11a of the inner box 11.

[0046] The heater 34 is provided on the rear side surface of the outer door 13. The heating unit 30 also has a heater (not shown) provided on the left side wall portion (not shown) of the inner box 11, and a heater (not shown) provided on the right side wall portion (not shown) of the inner box 11.

[0047] The heating unit 30 having the above-mentioned configuration operates under the control of the control unit 40 described below so as to make the temperature distribution in the culture chamber 20 uniform.

[0048] The heating unit 30 described above is an example of a heating unit, and the number, arrangement, and configuration of the heaters constituting the heating unit can be changed as appropriate.

[0049] In the culture chamber 20, a duct 22 extending vertically is disposed on the inner rear surface of the inner box 11. The duct 22 has an intake port 221 at an upper end portion. The duct 22 also has an exhaust port 222 at a lower end portion.

[0050] A gas passage 220 is formed inside the duct 22. A circulation blower 23 is disposed in the gas passage 220.

[0051] The circulation blower 23 corresponds to an example of an indoor blower. The circulation blower 23 draws air from the culture chamber 20 into the gas passage 220 through the suction port 221 of the duct 22. The operation of the circulation blower 23 is controlled by the control unit 40 described later.

[0052] The air sucked into the gas passage 220 moves downward within the gas passage 220. Then, the circulation blower 23 blows the air within the gas passage 220 out of the outlet 222 of the duct 22 into the culture chamber 20. This causes the air within the culture chamber 20 to circulate as indicated by the thick arrows in FIG.

[0053] Further, within the duct 22, a temperature sensor 24 and gas supply devices 25a and 25b are provided.

[0054] The temperature sensor 24 detects the temperature of the culture chamber 20. Specifically, the temperature sensor 24 is disposed near the suction port 221. The temperature sensor 24 detects the temperature of the air sucked in from the suction port 221.

[0055] The gas supply devices 25a and 25b supply O 2 Gas concentration and CO 2 Adjustment gas (O 2 Gas, N 2 (Nitrogen) gas and CO 2 gas) is supplied to the culture chamber 20.

[0056] Moreover, a humidity sensor (not shown) is disposed on the inner rear surface of the culture chamber 20. The humidity sensor detects the humidity in the culture chamber 20. The humidity sensor is disposed around the air outlet 222 in the lower part of the inner rear surface of the culture chamber 20.

[0057] A humidifying tray D for storing liquid (specifically, water) that becomes steam for humidification is installed between the lower part of duct 22 and the bottom surface of inner box 11. The water stored in humidifying tray D (hereinafter, referred to as stored water) is sterilized by being irradiated with ultraviolet rays by a UV lamp (not shown).

[0058] The water stored in the humidifying tray D evaporates (naturally vaporizes) in approximately proportion to the difference between the saturated vapor pressure according to the temperature of the water and the vapor pressure of the water in the gas phase inside the culture chamber 20. In this way, the humidifying tray D constitutes a natural evaporation type steam supply unit that supplies steam to the culture chamber 20 by natural evaporation.

[0059] The natural evaporation type steam supply unit supplies steam to the culture chamber 20 by natural evaporation. Therefore, the amount of steam supplied by the natural evaporation type steam supply unit changes depending on the humidity of the culture chamber 20. Furthermore, the humidity of the culture chamber 20 eventually reaches an equilibrium state at a predetermined humidity.

[0060] The water stored in the humidifying tray D may be heated by the heater 32. In this case, the humidifying tray D and the heater 32 constitute a natural evaporation type steam supply unit that supplies steam to the culture chamber 20 by natural evaporation.

[0061] The temperature of the water stored in the humidifying tray D is detected by the water temperature sensor 28. Here, the term "heating" is used because the heater 32 heats the water stored in the humidifying tray D to a temperature below the boiling point. The water stored in the humidifying tray D is heated by the heater 32 and naturally evaporates.

[0062] When the target humidity in the culture chamber 20 is not relatively high, the culture chamber 20 may be humidified by a natural evaporation type steam supply unit consisting of only the humidifying tray D without using the heater 32 (without heating).

[0063] On the other hand, when the target humidity in the culture chamber 20 is relatively high, the culture chamber 20 may be humidified by a natural evaporation type steam supply unit constituted by the humidifying tray D and the heater 32.

[0064] The cover 50 corresponds to an example of a cover portion, and forms a storage space 500 around the inner box 11. The cover 50 covers a part of the inner box 11. In other words, the cover 50 covers a part of the housing 10 (specifically, the outer box 12).

[0065] Specifically, the cover 50 covers the bottom surface, rear surface, and top surface of the inner box 11. In other words, the cover 50 covers the bottom surface, rear surface, and top surface of the housing 10 (specifically, the outer box 12).

[0066] The cover 50 has a lower cover portion 501 , a rear cover portion 502 , and an upper cover portion 503 .

[0067] The lower cover part 501 is provided below the housing 10 (specifically, the outer box 12). The lower cover part 501 is fixed to the lower surface of the housing 10 (specifically, the outer box 12). In this state, the lower cover part 501 covers the lower surface of the housing 10 (specifically, the outer box 12) from below. The lower cover part 501 has a lower housing space 500a.

[0068] The lower storage space 500a is a rectangular parallelepiped space provided below the inner box 11. The lower storage space 500a constitutes a part of the storage space 500. The lower storage space 500a faces the entire lower surface of the housing 10 (specifically, the outer box 12) in the up-down direction.

[0069] The lower cover part 501 has an intake port 501a for drawing air from an external space 9 (hereinafter simply referred to as "external space 9") outside the culture device 1 (in other words, the cover 50) into the accommodation space 500. The intake port 501a is provided at the front end part of the lower cover part 501.

[0070] In other words, the suction port 501a is provided in a portion of the lower cover part 501 that protrudes forward beyond the inner box 11 and the outer box 12 (hereinafter referred to as a lower protruding part 501b).

[0071] The lower protrusion 501b has an upper plate 501c that constitutes the upper surface of the lower protrusion 501b. The suction port 501a is provided in the upper plate 501c. Specifically, the suction port 501a is formed of a plurality of through holes that penetrate the upper plate 501c in the vertical direction.

[0072] As shown in FIG. 2, the suction port 501a is provided below the outer door 13 and the inner door 14 when the outer door 13 and the inner door 14 are in a closed state.

[0073] A reserve space 501d is provided between the suction port 501a (in other words, the upper plate portion 501c) and the lower surface of the outer door 13. The reserve space 501d may be regarded as a space that connects the storage space 500 and the external space 9. The reserve space 501d is in communication with the storage space 500 and the external space 9.

[0074] The rear cover part 502 is provided rearward of the housing 10 (specifically, the outer box 12). The rear cover part 502 is fixed to the rear side surface of the housing 10 (specifically, the outer box 12). In this state, the rear cover part 502 covers the rear side surface of the housing 10 (specifically, the outer box 12) from behind. The rear cover part 502 has a rear housing space 500b.

[0075] The rear storage space 500b is a rectangular parallelepiped space. The rear storage space 500b constitutes a part of the storage space 500. The rear storage space 500b faces the entire rear side surface of the housing 10 (specifically, the outer box 12) in the front-rear direction. The lower end of the rear storage space 500b communicates with the rear end of the lower storage space 500a.

[0076] Here, the devices disposed in the rear accommodating space 500b will be described. Various devices including electronic devices and non-electronic devices are disposed in the rear accommodating space 500b.

[0077] In addition, wiring or piping connected to the devices is arranged in the rear accommodation space 500b. The rear accommodation space 500b can also be regarded as a device arrangement space for arranging various devices. As described below, the rear accommodation space 500b is a space that has a negative pressure relative to the external space 9 (i.e., a negative pressure space 500A).

[0078] The devices arranged in the rear accommodation space 500b will be described below. First, an electrical component box 17 is arranged in the rear accommodation space 500b. The electrical component box 17 accommodates a control unit 40 and the like. The control unit 40 controls the overall operation of the culture device 1.

[0079] Holes or gaps H2 are provided in the electrical box 17. Such holes or gaps are for dissipating heat generated from the devices housed in the electrical box 17 into the housing space 500 (specifically, the rear housing space 500b).

[0080] Furthermore, some of the devices of the steam supplying device 18 included in the culture device 1 are disposed in the electrical component box 17 (that is, the rear housing space 500b).

[0081] The vapor supplying device 18 is a device for supplying vapor to the culture chamber 20. The operation of the vapor supplying device 18 is controlled by a control unit 40 described later. The vapor supplying device 18 has a vapor generating unit 18a and a vapor supplying unit 18b.

[0082] The steam generating unit 18a is disposed in the electrical component box 17 (that is, the rear housing space 500b). The steam generating unit 18a has a heater (not shown).

[0083] The steam supply unit 18b is tubular and supplies the steam generated in the steam generation unit 18a to the culture chamber 20. A portion of the steam supply unit 18b is also provided in the electrical box 17 (that is, the rear housing space 500b).

[0084] Moreover, some devices of a dehumidifying member 19 included in the culture device 1 are arranged in the electrical equipment box 17 (i.e., the rear housing space 500b). The dehumidifying member 19 dehumidifies the inside of the culture chamber 20 so as to prevent condensation in the culture chamber 20. The dehumidifying member 19 functions as a humidity adjustment unit.

[0085] The dehumidifying member 19 is provided with a cooling device 19a (e.g., a Peltier element) that cools the dehumidifying member 19. The cooling device 19a is disposed in the electrical box 17 (i.e., the rear housing space 500b). The operation of the cooling device 19a is controlled by the control unit 40.

[0086] Specifically, the control unit 40 controls the operation of the cooling device 19a based on the detection values ​​of the temperature sensor 24 in the culture chamber 20 and the outside air temperature sensor 27. The control unit 40 may use the detection value of a humidity sensor (not shown) to control the cooling device 19a.

[0087] A heat insulating material 19b is wrapped around the dehumidifying member 19. A part of the heat insulating material 19b is disposed in the electrical component box 17 (that is, in the rear housing space 500b).

[0088] Furthermore, an outside air temperature sensor 27 provided in the culture device 1 is disposed in the electrical component box 17 (that is, the rear housing space 500b). The outside air temperature sensor 27 detects the temperature around the culture device 1.

[0089] Each of the devices disposed in the rear housing space 500b as described above can be a source of fine particles. If the fine particles generated from these devices leak from the rear housing space 500b to the external space 9, the external space 9 may be contaminated.

[0090] Returning to the description of the cover 50, the upper cover part 503 is provided above the housing 10 (specifically, the outer box 12). The upper cover part 503 is fixed to the upper surface of the housing 10 (specifically, the outer box 12). In this state, the upper cover part 503 covers the upper surface of the housing 10 (specifically, the outer box 12) from above. The upper cover part 503 has an upper housing space 500c.

[0091] The upper storage space 500c is a rectangular parallelepiped space. The upper storage space 500c constitutes a part of the storage space 500. The upper storage space 500c faces the entire upper surface of the housing 10 (specifically, the outer box 12) in the up-down direction.

[0092] The upper accommodation space 500c has a blower arrangement space 500d and a filter arrangement space 500e.

[0093] The fan arrangement space 500d is a space in the front half and upper half of the upper storage space 500c. The fan arrangement space 500d is a space in which a fan 61 of an air purifying device 60 described later is arranged. The fan arrangement space 500d is a space upstream of the filter arrangement space 500e in the upper storage space 500c.

[0094] In addition, the upstream side and downstream side of the accommodation space 500 refer to the upstream side and downstream side of the air flow in the accommodation space 500. In the accommodation space 500, air is blown in the direction of the arrow A in FIG. 21 , A 22 , A 23 , A 24 It flows in the direction indicated.

[0095] In other words, in the accommodation space 500, air flows from the suction port 501a toward the blower port 503c, which will be described later, by the blower 61 of the air purifying device 60, which will be described later. In the accommodation space 500, the side closer to the suction port 501a is the upstream side. In the accommodation space 500, the side closer to the blower port 503c is the downstream side.

[0096] On the other hand, the filter arrangement space 500e is a space that is a front half and a lower half of the upper storage space 500c. The filter arrangement space 500e is a space in which a first filter 62 of the air purifying device 60 described later is arranged. The filter arrangement space 500e is a space downstream of the blower arrangement space 500d in the upper storage space 500c.

[0097] In this embodiment, the filter arrangement space 500e and the fan arrangement space 500d are arranged vertically. The fan arrangement space 500d and the filter arrangement space 500e are separated by a partition plate portion 503a that constitutes the upper cover portion 503.

[0098] However, the partition plate portion 503a has a ventilation opening 503b formed of a through hole in a part thereof. The ventilation opening 503b communicates the fan arrangement space 500d and the filter arrangement space 500e in a state in which air can move between them. Therefore, air can move between the fan arrangement space 500d and the filter arrangement space 500e.

[0099] The fan arrangement space 500d and the filter arrangement space 500e do not need to be separated by a partition plate. In other words, the partition plate portion 503a may be omitted. In this case, the configuration of the first filter 62 of the air purifying device 60 described later may also be appropriately changed.

[0100] Moreover, the upper cover part 503 has an air outlet 503c for blowing out the air in the accommodation space 500 to the outside space. In other words, the cover 50 has the air outlet 503c through which the clean air is blown out from the accommodation space by the air purifying device 60 described later. The air outlet 503c is provided at the front end part of the upper cover part 503.

[0101] Specifically, the air outlet 503c is provided in a portion of the upper cover part 503 that protrudes forward beyond the inner box 11 and the outer box 12 (hereinafter referred to as an upper protruding part 503d). The upper protruding part 503d has a lower plate part 503e that constitutes the lower surface of the upper protruding part 503d. The air outlet 503c is constituted by a through hole that passes through the lower plate part 503e in the vertical direction.

[0102] 2, the air outlet 503c is provided above the outer door 13 when the outer door 13 is in a closed state. In other words, the air outlet 503c faces the upper surface of the outer door 13 in the up-down direction when the outer door 13 is in a closed state.

[0103] When the outer door 13 is in a closed state, a part of the air outlet 503c is blocked from below by the upper surface of the outer door 13. Therefore, when the outer door 13 is in a closed state, the air blown out from the air outlet 503c flows in the direction of the arrow A in FIG. 24 13, the air flows into the external space 9 from the portion of the air outlet 503c that is not blocked by the upper surface of the outer door 13.

[0104] 3, when the outer door 13 is open, the upper surface of the outer door 13 is not present below the air outlet 503c. In other words, the air outlet 503c is not blocked by the upper surface of the outer door 13. When the outer door 13 is open, the air blown out from the air outlet 503c flows in the direction of the arrow A in FIG. 34As shown in the figure, an air current is formed downward from the air outlet 503c. Such an air current constitutes a so-called air curtain.

[0105] The air current (air curtain) flowing downward from the air outlet 503c is formed in front of the inner door 14. In other words, the air current (air curtain) flowing downward from the air outlet 503c is formed at a position where the outer door 13 in the closed state is present.

[0106] The air purifying device 60 corresponds to an example of a purifying device, and is provided in the accommodation space 500. The air purifying device 60 generates clean air by filtering the air in the accommodation space 500. Then, the air purifying device 60 blows out the generated clean air to the external space 9.

[0107] Such air purifying device 60 draws outside air from external space 9 into accommodation space 500, in front of and below inner box 11. That is, air purifying device 60 draws outside air from external space 9 into accommodation space 500 through suction port 501a.

[0108] The air purifying device 60 blows out clean air downward from a position forward and above the inner box 11. That is, the air purifying device 60 blows out clean air downward from the air outlet 503c.

[0109] Specifically, the air purifying device 60 includes a blower 61 , a first filter 62 , and a second filter 63 .

[0110] The blower 61 is provided upstream of the air outlet 503c in the accommodation space 500. Specifically, the blower 61 is provided in the upper accommodation space 500c (specifically, the blower arrangement space 500d) in the accommodation space 500. The blower 61 faces the ventilation opening 503b of the partition plate portion 503a from above.

[0111] The blower 61 blows air upstream of the blower 61 in the accommodation space 500 to downstream of the blower 61. The air blown out from the blower 61 passes through the ventilation opening 503b and flows into the filter arrangement space 500e. The specific operation of the blower 61 will be described later.

[0112] The number of fans may be one or more than one. The number of fans may be determined according to the size of the accommodation space 500. When the number of fans is more than one, the upper cover part 503 may have ventilation holes the number of which corresponds to the number of fans.

[0113] The first filter 62 is a so-called HEPA filter (High Efficiency Particulate Air Filter). The first filter 62 is a high-performance air filter that can capture fine particles contained in the air passing through the first filter 62.

[0114] The first filter 62 is provided between the air outlet 503c and the blower 61. The first filter 62 collects fine particles contained in the air sent out from the blower 61. The first filter 62 filters the air sent out from the blower 61 to generate clean air. The air that has passed through the first filter 62 is the clean air.

[0115] Specifically, the first filter 62 is provided in an upper accommodation space 500c (specifically, a filter arrangement space 500e) in the accommodation space 500. The first filter 62 faces the ventilation opening 503b of the partition plate portion 503a from below. The first filter 62 is a plate-shaped filter that is parallel in the front-rear and left-right directions.

[0116] The peripheral surfaces of the first filter 62 (that is, both sides in the left-right direction and both sides in the front-rear direction) fit snugly into the portion of the upper cover part 503 that forms the filter arrangement space 500e.

[0117] Therefore, all of the air flowing from the filter arrangement space 500e toward the air outlet 503c passes through the first filter 62. In other words, all of the air flowing from the filter arrangement space 500e toward the air outlet 503c is filtered by the first filter 62.

[0118] The second filter 63 is provided in the lower storage space 500a. The second filter 63 applies resistance to air passing through the second filter 63. The second filter 63 is provided near the upstream end of the lower storage space 500a. The second filter 63 is provided in the lower storage space 500a near the downstream side of the suction port 501a.

[0119] The trapping capacity of the second filter 63 is lower than the trapping capacity of the first filter 62. Therefore, the second filter 63 traps substances larger than the fine particles trapped by the first filter 62.

[0120] The second filter 63 is a plate-like filter parallel to the up-down and left-right directions. The peripheral surfaces of the second filter 63 (i.e., both sides in the up-down direction and both sides in the left-right direction) are fitted tightly to the inner surface of the lower cover portion 501.

[0121] The following describes the operation of the air purifying device 60. The operation of the air purifying device 60 is controlled by the control unit 40. In other words, the control unit 40 controls the operation of the air purifying device 60 by controlling the operation of the blower 61.

[0122] Specifically, the control unit 40 drives the blower 61 at all times when the culture device 1 is in a driving state.

[0123] However, the control unit 40 switches the operation state of the blower 61 depending on the state of the outer door 13. Specifically, the control unit 40 drives the blower 61 in the first drive state when the outer door 13 is open (the state shown in FIG. 3).

[0124] On the other hand, when the outer door 13 is in the closed state (the state shown in FIG. 2), the control unit 40 drives the blower 61 in the second drive state.

[0125] The output of blower 61 driven in the first drive state is greater than the output of blower 61 driven in the second drive state. In other words, the amount of air (airflow) sent out from blower 61 in the first drive state is greater than the amount of air (airflow) sent out from blower 61 in the second drive state. The airflow of blower 61 means the amount (volume) of air sent out per unit time (one minute).

[0126] In other words, the amount of air (blowout amount) blown out from the accommodation space 500 by the blower 61 in the first driving state is greater than the amount of air (blowout amount) blown out from the accommodation space 500 by the blower 61 in the second driving state.

[0127] The blowing amount means the amount (volume) of air blown out from the accommodation space 500 per unit time (1 minute). In the first driving state and the second driving state of the blower 61, the air pressure in the negative pressure space 500A described below is always kept negative. On the other hand, in a state in which the blower 61 is not driven (also referred to as a non-driving state of the blower 61), the air pressure in the negative pressure space 500A is not kept negative.

[0128] In other words, in the operating states (first operating state and second operating state) of the air purifying device 60, the air pressure in the negative pressure space 500A is constantly kept negative. On the other hand, in the non-operating state of the air purifying device 60, the air pressure in the negative pressure space 500A is not kept negative. The air pressure in the negative pressure space 500A in the non-operating state of the air purifying device 60 may be the same as the air pressure in the external space 9.

[0129] Such a configuration can reduce power consumption when the outer door 13 is closed (the state shown in FIG. 2 ) while preventing air from leaking from the storage space 500 to the external space 9. In other words, such a configuration can prevent contamination of the external space 9 while saving energy.

[0130] Hereinafter, the operation of the air purifying device 60 and the state of the accommodation space 500 when the outer door 13 is open will be described with reference to FIG.

[0131] When the outer door 13 is open, the air purifier 60 (specifically, the blower 61) operates in the first drive state. When the outer door 13 is open, the circulation blower 23 stops blowing air. This configuration can prevent the air in the culture chamber 20 from flowing out to the external space 9 when the inner door 14 is open. As a result, the external space 9 is prevented from being polluted by the air in the culture chamber 20.

[0132] When the blower 61 is driven in the first drive state, the airflow is as indicated by arrow A in FIG. 31 As indicated by , outside air is drawn from the external space 9 through the suction port 501a into the accommodation space 500 (specifically, the lower accommodation space 500a).

[0133] The air drawn into the lower storage space 500a passes through the second filter 63. At this time, the air encounters resistance from the second filter 63. In the case of this embodiment, in the first driving state of the air purifying device 60 (specifically, the blower 61), the airflow rate of the blower 61 is greater than the amount of air passing through the second filter 63 (hereinafter referred to as the "second filter passing amount").

[0134] Therefore, the air pressure in the space between the blower 61 and the second filter 63 in the accommodation space 500 becomes negative relative to the external space 9. Therefore, the accommodation space 500 has a negative pressure space 500A that is negative relative to the external space 9 in a part thereof.

[0135] The negative pressure space 500A is composed of a part of the lower storage space 500a, a part of the rear storage space 500b, a part of the upper storage space 500c, and the space between the inner box 11 and the outer box 12 through which air can move via gaps and holes in the outer box 12. In other words, the negative pressure space 500A is also a space that surrounds the inner box 11 from the left side, right side, bottom, rear side, and top.

[0136] The negative pressure space 500A may be a space that surrounds the inner box 11 at least from the lower side, the rear side, and the upper side. The position of the negative pressure space 500A may vary depending on the position of the suction port 501a. For example, the negative pressure space 500A may be a space that surrounds the inner box 11 at least from the rear side and the upper side. Furthermore, the negative pressure space 500A may be a space that surrounds the inner box 11 at least from the upper side.

[0137] Such a configuration can prevent the air in the negative pressure space 500A from passing through the gaps in the cover 50 and leaking into the external space 9. As a result, it is also possible to prevent fine particles contained in the air in the negative pressure space 500A from leaking into the external space 9.

[0138] The air that has passed through the second filter 63 is directed in the direction of arrow A in FIG. 32 , A 33 2, the air passes through the lower accommodation space 500a, the rear accommodation space 500b, and the upper accommodation space 500c, and is sucked into the blower 61.

[0139] The air upstream of the blower 61 contains fine particles generated from devices arranged in the rear housing space 500b, wiring and piping connected to the devices, and the thermal insulation material 16. The fine particles generated from the thermal insulation material 16 pass through gaps in the outer box 12 and enter the rear housing space 500b.

[0140] The air sent out from the blower 61 passes through the ventilation opening 503b and is sent to the first filter 62. Then, the air sent out from the blower 61 passes through the first filter 62.

[0141] The first filter 62 captures fine particles contained in the air passing through the first filter 62. Therefore, the air that has passed through the first filter 62 is clean air. In this manner, the air purifying device 60 filters the air in the accommodation space 500 to generate clean air.

[0142] In the accommodation space 500 (specifically, the filter arrangement space 500e), air that has passed through the first filter 62 flows into the space downstream of the first filter 62. That is, the air in the space downstream of the first filter 62 is clean air.

[0143] In this embodiment, the amount of air passing through the first filter 62 is larger than the amount of air blown out from the accommodation space 500 (specifically, the air outlet 503c) (that is, the blow-out amount).

[0144] Therefore, in the accommodation space 500 (specifically, the filter arrangement space 500e), the air pressure in the space downstream of the first filter 62 becomes positive relative to the external space 9. In other words, the accommodation space 500 has a part of a positive pressure space 500B that is at a positive pressure relative to the external space 9.

[0145] The positive pressure space 500B communicates with the culture chamber 20 via the first port 100. Therefore, in the first driving state of the air purifying device 60, the air pressure in the culture chamber 20 is positive relative to the external space 9.

[0146] Therefore, even when the cap 102 is removed from the second port 101, air (i.e., outside air) in the space in front of the inner door 14 (i.e., the external space 9) is prevented from flowing into the culture chamber 20 through the second port 101. As a result, particles contained in the outside air are also prevented from flowing into the culture chamber 20. Therefore, the environment of the culture chamber 20 is maintained in an appropriate state.

[0147] The clean air in the positive pressure space 500B is blown downward from the air outlet 503c by the blower 61. The clean air blown out from the air outlet 503c is directed in the direction of arrow A in FIG. 34 As shown in FIG. 1, an air flow from above to below is formed in front of the inner door 14.

[0148] This air current constitutes a so-called air curtain. The air curtain is formed in the left-right direction over the entire length of the inner door 14. Also, the air curtain is formed in the up-down direction over the entire length of the inner door 14. The air curtain is formed when the inner door 14 is in the open state and when it is in the closed state.

[0149] Such an air curtain prevents air from the external space 9 from flowing into the culture chamber 20 when the inner door 14 is open. As a result, particles contained in the outside air are also prevented from flowing into the culture chamber 20. Therefore, the environment of the culture chamber 20 is maintained in an appropriate state.

[0150] The control unit 40 may control the operation of the blower 61 depending on the state (open state or closed state) of the inner door 14. Specifically, the control unit 40 may set the air volume of the blower 61 when the inner door 14 is open to be larger than the air volume of the blower 61 when the inner door 14 is closed. This configuration can prevent outside air from flowing into the culture chamber 20 when the inner door 14 is open, and can reduce power consumption when the inner door 14 is closed.

[0151] In addition, the air that constitutes the air curtain is clean air, so that the external space 9 is not polluted due to the construction of the air curtain.

[0152] In this embodiment, the suction port 501a is provided in the direction in which the air constituting the air curtain flows. Therefore, when the inner door 14 is open, the air constituting the air curtain is sucked again into the storage space 500 from the suction port 501a. Thus, in this embodiment, when the inner door 14 is open, the air in the storage space 500 flows in the direction of the arrow A in FIG. 31 ~A 34 The cycle continues in this order.

[0153] Next, the operation of the air purifying device 60 and the state of the accommodation space 500 when the outer door 13 is closed will be described with reference to FIG.

[0154] When the outer door 13 is closed, the air cleaning device 60 (specifically, the blower 61) operates in the second drive state.

[0155] The output of the blower 61 in the second driving state of the air purifying device 60 is smaller than the output of the blower 61 in the first driving state of the air purifying device 60. In other words, the air volume of the blower 61 in the second driving state of the air purifying device 60 is smaller than the air volume of the blower 61 in the first driving state of the air purifying device 60.

[0156] However, in the second driving state of the air purifying device 60, a negative pressure space 500A and a positive pressure space 500B are formed in the accommodation space 500, similar to the first driving state of the air purifying device 60. In other words, in the second driving state of the air purifying device 60, the blower 61 is driven with an output capable of forming the negative pressure space 500A and the positive pressure space 500B in the accommodation space 500.

[0157] When the blower 61 is driven in the second drive state, the airflow is reduced as indicated by the arrow A in FIG. 21 As indicated by , outside air is drawn from the external space 9 through the suction port 501a into the accommodation space 500 (specifically, the lower accommodation space 500a).

[0158] When the outer door 13 is in a closed state, the amount of air sucked into the storage space 500 through the suction port 501a is less than the amount of air sucked into the storage space 500 through the suction port 501a when the outer door 13 is in an open state.

[0159] Furthermore, when the outer door 13 is in a closed state, the ventilation resistance acting on the air (i.e., outside air) sucked into the storage space 500 is greater than the ventilation resistance acting on the air (i.e., outside air) sucked into the storage space 500 when the outer door 13 is in an open state. This is because the entrance (suction port) of the reserve space 501d is narrowed by the packing P2 provided on the underside of the outer door 13.

[0160] In this manner, when the outer door 13 is in a closed state, air is not easily drawn into the storage space 500. Therefore, even when the blower 61 is driven in the second drive state having a lower output than the first drive state, the negative pressure space 500A is formed in the storage space 500.

[0161] The air drawn into the lower accommodation space 500a passes through the second filter 63. At this time, the air receives resistance from the second filter 63. In the case of the present embodiment, in the second driving state of the air purifying device 60 (specifically, the blower 61), the airflow rate of the blower 61 is greater than the amount of air passing through the second filter 63 (i.e., the second filter passing amount).

[0162] Therefore, the air pressure in the space between the blower 61 and the second filter 63 in the accommodation space 500 becomes negative relative to the external space 9. In other words, the accommodation space 500 has a negative pressure space 500A that is negative relative to the external space 9 in a part thereof.

[0163] The negative pressure space 500A is composed of a part of the lower storage space 500a, a part of the rear storage space 500b, and a part of the upper storage space 500c. In other words, the negative pressure space 500A is also a space that surrounds the inner box 11 from the lower side, the rear side, and the upper side.

[0164] Such a configuration can prevent the air in the negative pressure space 500A from passing through the gaps in the cover 50 and leaking into the external space 9. As a result, it is also possible to prevent fine particles contained in the air in the negative pressure space 500A from leaking into the external space 9.

[0165] In the present embodiment, a negative pressure space 500A is formed in the open and closed states of the outer door 13. Therefore, in the open and closed states of the outer door 13, the air in the negative pressure space 500A can be prevented from passing through the gaps in the cover 50 and leaking into the external space 9.

[0166] The air that has passed through the second filter 63 is directed in the direction of arrow A in FIG. 22 , A 232, the air passes through the lower accommodation space 500a, the rear accommodation space 500b, and the upper accommodation space 500c, and is sucked into the blower 61.

[0167] The air upstream of the blower 61 contains fine particles generated from devices arranged in the rear accommodation space 500b, wiring and piping connected to the devices, the heat insulating material 16, and the like.

[0168] The air sent out from the blower 61 passes through the ventilation opening 503b and is sent to the first filter 62. Then, the air sent out from the blower 61 passes through the first filter 62.

[0169] The first filter 62 captures fine particles contained in the air passing through the first filter 62. Therefore, the air that has passed through the first filter 62 is clean air. In this manner, the air purifying device 60 filters the air in the accommodation space 500 to generate clean air.

[0170] In the accommodation space 500 (specifically, the filter arrangement space 500e), air that has passed through the first filter 62 flows into the space downstream of the first filter 62. That is, the air in the space downstream of the first filter 62 is clean air.

[0171] In this embodiment, the amount of air passing through the first filter 62 is larger than the amount of air blown out from the accommodation space 500 (specifically, the air outlet 503c) (that is, the blow-out amount).

[0172] Therefore, in the accommodation space 500 (specifically, the filter arrangement space 500e), the air pressure in the space downstream of the first filter 62 becomes positive relative to the external space 9. In other words, the accommodation space 500 has a part of a positive pressure space 500B that is at a positive pressure relative to the external space 9.

[0173] The positive pressure space 500B communicates with the culture chamber 20 via the first port 100. Therefore, in the first driving state of the air purifying device 60, the air pressure in the culture chamber 20 is positive relative to the external space 9.

[0174] In addition, the air pressure in the positive pressure space 500B is constantly kept positive in the first drive state and the second drive state of the blower 61. On the other hand, in the non-drive state of the blower 61, the air pressure in the positive pressure space 500B is not kept positive.

[0175] In other words, in the driven states (first and second driving states) of the air purifying device 60, the air pressure in the positive pressure space 500B is constantly kept at a positive pressure. On the other hand, in the non-driven state of the air purifying device 60, the air pressure in the positive pressure space 500B is not kept at a positive pressure. The air pressure in the positive pressure space 500B in the non-driven state of the air purifying device 60 may be the same as the air pressure in the external space 9.

[0176] Furthermore, the clean air in the positive pressure space 500B is blown downward from the air outlet 503c by the blower 61. However, when the outer door 13 is in a closed state, a part of the air outlet 503c is blocked from below by the upper surface of the outer door 13.

[0177] Therefore, the air blown downward from the air outlet 503c hits the upper surface of the outer door 13 and then flows in the direction of the arrow A in FIG. 24 As shown in the figure, the air flows toward the front of the outer door 13. Therefore, no air curtain is formed in front of the inner door 14.

[0178] In this embodiment, when the outer door 13 is closed, the amount of air blown out from the air outlet 503c by the air purifier 60 is less than the amount of air blown out from the air outlet 503c by the air purifier 60 when the outer door 13 is open.

[0179] Moreover, when the outer door 13 is closed, the air blown out from the air outlet 503c is clean air. Therefore, when the outer door 13 is closed, the external space 9 is not polluted due to the air being blown out from the air outlet 503c.

[0180] (Actions and Effects of This Embodiment) The culture apparatus 1 according to this embodiment having the above-mentioned configuration can suppress the intrusion of foreign matter such as fine particles from the external space 9 into the culture chamber 20, while suppressing the leakage of fine particles generated within the culture apparatus 1 into the external space 9. The reason for this is as described above. In addition, other actions and effects obtained from the culture apparatus 1 according to this embodiment are also as described above.

[0181] [Note] When implementing the culture device according to the present invention, the devices to be placed in the storage space are not limited to the above-mentioned devices. In addition, a configuration in which no devices other than the air purifier are placed in the storage space is also included in the technical scope of the present invention. Specifically, a duct provided around the inner box is an example of a configuration in which no devices other than the purifier are placed in the storage space.

[0182] Furthermore, when implementing the culture device according to the present invention, the culture device does not need to have all of the above-mentioned configurations. The configurations of the culture device may be appropriately selected within a range that is not technically inconsistent. [Industrial Applicability]

[0183] The present invention can be applied to various culture devices. [Explanation of symbols]

[0184] 1 Culture device 10. Chassis 100 First Port 101 Second Port 102 Cap 11 Inner box 110 Opening 11a Rear wall 11b Upper wall 11c Lower wall 12 Outer box 13 Outer door 14 Inner door 15 Front Panel 16 Insulation 17 Electrical box 18 Steam supply device 18a Steam generating section 18b Steam supply section 19 Dehumidifying materials 19a Cooling device 19b Insulation 20 Culture room 22 Duct 220 Gas passage 221 Intake port 222 Air outlet 23 Circulation blower 24 Temperature Sensor 25a, 25b Gas supply device 27 Outside air temperature sensor 28 Water temperature sensor 30 Heating section 31, 32, 33, 34 Heater 40 Control section 50 Cover 500 Storage space 500a Lower storage space 500b Rear storage space 500c upper storage space 500d Blower placement space 500e filter placement space 500A Negative Pressure Space 500B Positive pressure space 501 Lower cover part 501a Intake port 501b Lower protrusion 501c Upper plate part 501d Spare Space 502 Rear cover part 503 Upper cover part 503a Partition plate 503b Ventilation hole 503c air outlet 503d Upper protrusion 503e Lower plate part 60 Air Purifier 61 Blower 62 First Filter 63 Second Filter 9. Exterior Space P, P2, P3 packing D Humidifying dish H hole H2 Hole or gap

Claims

1. an inner box having a culture chamber; An openable and closable inner door that covers the opening of the culture chamber; an outer door that can be opened and closed and covers the inner door from the outside; A cover portion that forms a storage space around the inner box; A cleaning device is provided in the storage space and blows out clean air obtained by filtering the air in the storage space to the outside. The cleaning device includes: Taking in outside air from the outside into the storage space, The clean air is blown downward in front of and above the inner door. Culture device.

2. The storage space has a negative pressure space that is negative pressure relative to the outside in a part thereof. The culture device according to claim 1 .

3. The cleaning device draws the outside air from the outside into the storage space in front of and below the inner door. The culture device according to claim 1 or 2.

4. The negative pressure space is provided in a space surrounding the inner box at least from the lower side, the rear side, and the upper side. The culture device according to claim 2.

5. Further comprising any one of a device, a wiring member for the device, and a thermal insulating material provided in the negative pressure space; The culture device according to claim 2.

6. The cover portion has an outlet through which the clean air is blown out of the storage space by the cleaning device, The cleaning device includes: A blower provided upstream of the air outlet; A filter is provided downstream of the blower and filters the air sent out from the blower to generate the clean air. The culture device according to claim 2.

7. The storage space is A lower storage space provided below the inner box; A rear storage space provided at the rear of the inner box; An upper storage space provided above the inner box, The blower and the filter are provided in the upper storage space. The culture device according to claim 6.

8. The cleaning device further includes a second filter in the lower storage space that acts as a resistance to air passing through the second filter. The negative pressure space is provided between the blower and the second filter. The culture device according to claim 7.

9. The cleaning device maintains the negative pressure space at a negative pressure while reducing the amount of clean air blown out when the outer door is closed compared to the amount of clean air blown out when the outer door is open. The culture device according to claim 2.

10. The culture device according to claim 9, wherein the ventilation resistance acting on the outside air sucked into the storage space when the outer door is closed is greater than the ventilation resistance acting on the outside air sucked into the storage space when the outer door is open.

11. The storage space has a positive pressure space that is at a positive pressure relative to the outside in a part thereof, The inner box is A first port communicating the positive pressure space with the culture chamber; A second port that communicates a space outside the inner box other than the storage space with the culture chamber; a cap that is detachably attached to the second port and closes the second port. The culture device according to claim 1 or 2.

12. The cleaning device includes: When the outer door is in a closed state, the clean air is blown out from a position above the outer door and facing an upper surface of the outer door in a vertical direction, When the outer door is in an open state, the clean air flowing in front of the inner door constitutes an air curtain. The culture device according to claim 1 or 2.

13. The cleaning device reduces the amount of clean air blown out when the outer door is closed compared to the amount of clean air blown out when the outer door is open. The culture device according to claim 12.

14. Further comprising an indoor fan for circulating air in the culture chamber; The indoor blower stops blowing air when the outer door is open. The culture device according to claim 1 or 2.

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