Exhaust device

Abstract

Abnormal sound generation is suppressed. An exhaust device (101) is an exhaust device that exhausts indoor air from indoors to outdoors. The exhaust device (101) includes a housing (12) and a blower fan (13). The housing (12) has a first suction port (12a) formed in an upper surface. The blower fan (13) is housed in the housing (12). In a plan view, the first suction port (12a) is located near a first side surface (S1) side of the housing. The blower fan (13) is located near a second side surface (S2) side of the housing (12). The second side surface (S2) of the housing (12) is a surface opposite the first side surface (S1).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an exhaust device. BACKGROUND

[0002] Conventionally, an air conditioning device provided with an exhaust function is known. For example, in an air conditioning device described in Patent Literature 1 (Japanese Patent No. 7135241), an exhaust device is disposed adjacent to a side surface of an indoor unit. SUMMARY

[0003] PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] Since the exhaust device is disposed in a room together with the indoor unit, there is a case where abnormal sound becomes a problem.

[0005] MEANS FOR SOLVING THE PROBLEMS

[0006] The exhaust device of the first aspect is an exhaust device that exhausts indoor air from a room to the outside. The exhaust device is provided with a housing and a blower. The housing is formed with a first suction port in an upper surface. The blower is housed in the housing. In plan view, the first suction port is located close to a first side surface side of the housing. The blower is located close to a second side surface side of the housing. The second side surface of the housing is a surface opposite the first side surface.

[0007] If the first suction port is close to the blower, the air sucked in hits the blower, and abnormal sound is generated.

[0008] In the exhaust device of the first aspect, in plan view, the first suction port is located close to a first side surface side of the housing, and the blower is located close to a second side surface side of the housing, the second side surface side of the housing being a surface opposite the first side surface. Therefore, generation of abnormal sound can be suppressed.

[0009] The exhaust device of the second aspect is the exhaust device of the first aspect in which, in plan view, the first suction port does not overlap the blower.

[0010] Here, generation of abnormal sound can be further suppressed.

[0011] The exhaust device of the third aspect is the exhaust device of the first aspect or the second aspect in which, in plan view, the entire first suction port is located at a position closer to the first side surface than a center of the upper surface.

[0012] Here, in plan view, overlap of the first suction port and the blower can be reduced.

[0013] The exhaust device of the fourth aspect is the exhaust device of any one of the first aspect to the third aspect in which a housing of the blower has a bell mouth. The bell mouth is formed with a second suction port. The second suction port sucks in indoor air that has entered the housing from the first suction port. In plan view, the bell mouth is disposed at a position closer to the second side surface than a center of the upper surface.

[0014] Here, the air sucked in can be smoothly sent to the air blower.

[0015] The exhaust device of the fifth aspect is configured adjacent to an air conditioning indoor unit that performs temperature adjustment of indoor air in the exhaust device of any one of the first to fourth aspects. The first suction port is configured on a side close to the air conditioning indoor unit. The air blower is configured on a side away from the air conditioning indoor unit.

[0016] Here, by making the air blower away from the indoor unit, it is possible to suppress the influence of the air blower vibration on the air conditioning indoor unit. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an appearance view of an air conditioning device.

[0018] Figure 2 is a view showing a refrigerant circuit and flow of air of an air conditioning device.

[0019] Figure 3 is a perspective view of an air conditioning indoor unit and an exhaust device.

[0020] Figure 4 is an exploded schematic view of an exhaust device.

[0021] Figure 5 is a front view of an air blower.

[0022] Figure 6 is a perspective view of an air blower. DETAILED DESCRIPTION

[0023] (1) Overall structure

[0024] Figure 1 is an appearance view of an air conditioning device 100 including an exhaust device 101 of one embodiment. Figure 2 is a view showing a refrigerant circuit 10 and flow of air of the air conditioning device 100. In addition, Figure 2 is a conceptual view, and up, down, left, and right are not accurate.

[0025] The air conditioning device 1 performs air conditioning of an indoor space SP of a building or the like, which is an object space, by a vapor compression type refrigerant cycle. As Figure 1 indicated, the air conditioning device 100 has a heat source unit 2, an air conditioning indoor unit 3, a liquid refrigerant communication pipe 5, a gas refrigerant communication pipe 6, a remote controller 8, a control portion (not shown), and an exhaust device 101.

[0026] The liquid refrigerant communication pipe 5 and the gas refrigerant communication pipe 6 connect the heat source unit 2 and the air-conditioning indoor unit 3. The devices and the refrigerant pipes in the heat source unit 2, the devices and the refrigerant pipes in the air-conditioning indoor unit 3, the liquid refrigerant communication pipe 5, and the gas refrigerant communication pipe 6 are connected in a ring shape by the refrigerant pipes, and constitute a refrigerant circuit 10. The refrigerant circuit 10 is internally sealed with a refrigerant.

[0027] (2) Detailed configuration

[0028] (2-1) Heat source unit

[0029] The heat source unit 2 is provided in an outdoor place (a roof of a building, a wall surface of a building, or the like). As shown in FIG. 1, the heat source unit 2 mainly has a compressor 21, a four-way switching valve 23, a heat-source heat exchanger 24, a heat-source expansion valve 25, and a heat-source fan 26. Figure 2

[0030] (2-1-1) Compressor

[0031] The compressor 21 sucks in low-pressure refrigerant from a refrigerant pipe 21a on the suction side, compresses it to become high-pressure refrigerant, and discharges it to a refrigerant pipe 21b on the discharge side in the refrigerant circuit 10.

[0032] (2-1-2) Four-way switching valve

[0033] The four-way switching valve 23 switches the flow direction of the refrigerant in the refrigerant circuit 10. The four-way switching valve 23 has a first port P1, a second port P2, a third port P3, and a fourth port P4. The four-way switching valve 23 switches between a first state in which the first port P1 and the fourth port P4 are in communication with each other and the second port P2 and the third port P3 are in communication with each other, and a second state in which the first port P1 and the second port P2 are in communication with each other and the third port P3 and the fourth port P4 are in communication with each other, by a control unit.

[0034] The first port P1 is connected to the refrigerant pipe 21b on the discharge side of the compressor 21. The second port P2 is connected to the gas side of the heat-source heat exchanger 24. The third port P3 is connected to the refrigerant pipe 21a on the suction side of the compressor 21. The fourth port P4 is connected to the gas refrigerant communication pipe 6.

[0035] (2-1-3) Heat-source heat exchanger

[0036] The heat-source heat exchanger 24 is a heat exchanger that performs heat exchange between refrigerant and outdoor air in the refrigerant circuit 10. One end of the heat-source heat exchanger 24 is connected to the heat-source expansion valve 25. The other end of the heat-source heat exchanger 24 is connected to the second port P2 of the four-way switching valve 23.

[0037] (2-1-4) Heat-source expansion valve ​

[0038] The heat-source expansion valve 25 is an expansion mechanism that depressurizes the refrigerant in the refrigerant circuit 10. The heat-source expansion valve 25 is provided between the liquid refrigerant communication pipe 5 and the liquid side of the heat-source heat exchanger 24. The heat-source expansion valve 25 is an electric expansion valve that can perform opening degree control. The opening degree of the heat-source expansion valve 25 is controlled by the control portion.

[0039] (2-1-5) Heat-source fan

[0040] The heat-source fan 26 generates an airflow to supply the air outside to the heat-source heat exchanger 24. The heat-source fan 26 supplies the air outside to the heat-source heat exchanger 24 to promote heat exchange between the refrigerant in the heat-source heat exchanger 24 and the air outside. The heat-source fan 26 is rotationally driven by a heat-source fan motor 26a. The air volume of the heat-source fan 26 is controlled by changing the rotational speed of the heat-source fan motor 26a by the control portion.

[0041] (2-2) Air-conditioning indoor unit

[0042] The air-conditioning indoor unit 3 performs temperature adjustment of the indoor air. The air-conditioning indoor unit 3 is a wall-mounted air-conditioning indoor unit that is provided on a wall in the indoor space SP as the target space SP. The air-conditioning indoor unit 3 mainly has a utilization heat exchanger 31 and a utilization fan rotor 32.

[0043] (2-2-1) Utilization heat exchanger

[0044] The utilization heat exchanger 31 performs heat exchange between the refrigerant and the air in the indoor space in the refrigerant circuit 10. One end of the utilization heat exchanger 31 is connected to the liquid refrigerant communication pipe 5. The other end of the utilization heat exchanger 31 is connected to the gas refrigerant communication pipe 6. The utilization heat exchanger 31 is not limited, and is, for example, a cross fin type finned tube heat exchanger composed of a heat transfer pipe and a heat transfer fin.

[0045] The utilization heat exchanger 31 is arranged in the flow path of the airflow generated by the utilization fan rotor 32. Specifically, as shown in FIG. 2, the utilization heat exchanger 31 is arranged so as to cover the front and upper sides of the utilization heat exchanger 31. Figure 2

[0046] (2-2-2) Utilization fan rotor

[0047] The utilization fan rotor 32 is an air supply device that generates an airflow. The utilization fan rotor 32 generates an airflow, and thus the air in the indoor space passes through the utilization heat exchanger 31. The air in the indoor space passes through the utilization heat exchanger 31, and thus heat exchange between the refrigerant of the utilization heat exchanger 31 and the air outside is promoted.

[0048] ​The fan rotor 32 is a cross-flow fan. The fan rotor 32 is rotationally driven by the fan motor 32a. The air volume of the fan rotor 32 is controlled by changing the rotational speed of the fan motor 32a by the control unit.

[0049] When the fan rotor 32 is operated, as shown by the solid arrows in FIG. 2, the air in the room is drawn into the casing from the space above the air conditioner indoor unit 3 through the suction port 34a, and after heat exchange by the heat exchanger 31, flows to the room from the blow port 34b formed in the lower portion of the casing. Figure 1 and Figure 2 As shown by the dotted arrows in FIG. 2, when the fan rotor 32 is operated, the air in the room is drawn into the casing from the space above the air conditioner indoor unit 3 through the suction port 34a, and after heat exchange by the heat exchanger 31, flows to the room from the blow port 34b formed in the lower portion of the casing.

[0050] (2-3) Remote controller

[0051] The remote controller 8 receives from the user an execution instruction of air conditioning operation such as heating operation, cooling operation, humidifying operation, a stop instruction of the air conditioning device 100, and a set value such as set humidity, and transmits the received result as a control signal to the control unit. The control unit records the received set value in the storage device.

[0052] (2-4) Control unit

[0053] The control unit is mainly connected to the compressor 21, the four-way switching valve 23, the heat source expansion valve 25, the heat source fan motor 26a, the utilization fan motor 32a, and the remote controller 8.

[0054] The control unit controls the refrigerant circuit 10 by performing operation control of the compressor 21, the four-way switching valve 23, the heat source expansion valve 25, the heat source fan motor 26a, and the utilization fan motor 32a, respectively.

[0055] The control unit is typically realized by a computer provided with a control arithmetic device and a storage device (both not shown). The control arithmetic device is a processor such as a CPU or a GPU. The control arithmetic device reads out a control program stored in the storage device and performs operation control in accordance with the control program. Also, the control arithmetic device can write an arithmetic result in the storage device or read out information stored in the storage device in accordance with the control program.

[0056] In addition, the control unit is composed of an outdoor control unit provided in the inside of the heat source unit 2 and an indoor control unit provided in the inside of the air conditioner indoor unit 3, which are connected by a communication line through which control signals can be transmitted and received.

[0057] (3) Exhaust device

[0058] The exhaust device 101 exhausts the indoor air from the room to the outside.

[0059] As shown in FIG. 3, the exhaust device 101 is provided with a casing 102, a fan rotor 103, and a fan motor 104. Figure 3 and Figure 4As shown, the air exhaust device 101 is disposed adjacent to the right side surface when the air conditioning indoor unit 3 is viewed from the front. The air exhaust device 101 is connected to the air conditioning indoor unit 3 via a cable (omitted from the drawing). The air exhaust device 101 is powered by the air conditioning indoor unit 3.

[0060] The air exhaust device 101 has a housing 12 and a blower fan 13.

[0061] Hereinafter, the top view refers to a view of the housing 12 of the air exhaust device 101 from directly above. The center C of the upper surface refers to the center in the horizontal direction of the housing 12, i.e., the center in the width direction of the housing 12.

[0062] (3-1) Housing

[0063] The housing 12 has a first side surface S1, a second side surface S2, a first suction port 12a, and an exhaust port 12b. The first side surface S1 is a surface that extends in the vertical direction with a gap from the side surface of the air conditioning indoor unit 3. The second side surface S2 is a surface that opposes the first side surface S1.

[0064] The first suction port 12a is formed in the upper surface of the housing 12. Indoor air is taken into the air exhaust device 101 through the first suction port 12a.

[0065] In the top view, the first suction port 12a is located near the first side surface S1 side of the housing 12. In the top view, the entire first suction port 12a is located at a position closer to the first side surface S1 side than the center C of the upper surface. Thus, the first suction port 12a is disposed at a position closer to one side of the blower fan 13 than the air conditioning indoor unit 3.

[0066] A filter (omitted from the drawing) is disposed in the first suction port 12a. The filter is, for example, a mesh made of PE (polyethylene). The filter traps dust in the air taken in from the first suction port 12a.

[0067] The exhaust port 12b is disposed in the rear surface of the housing 12.

[0068] The exhaust port 12b, a hose 46 extending from the exhaust port 12b to the outside, and an outdoor exhaust port 43c form an exhaust flow path 51.

[0069] (3-2) Blower fan

[0070] The blower fan 13 is housed in the housing 12.

[0071] In the top view, the blower fan 13 is located near the second side surface S2 side of the housing 12. In the top view, the blower fan 13 is disposed at a position closer to the second side surface S2 side than the center C of the upper surface. Thus, the blower fan 13 is disposed at a position farther from one side of the first suction port 12a than the air conditioning indoor unit 3. In the top view, the blower fan 13 does not overlap the first suction port 12a.

[0072] The air blower 13 is, for example, a silo fan. However, the air blower 13 is not particularly limited thereto. The air blower 13 can be, for example, a turbo fan, a cross flow fan, or the like. Hereinafter, a case where the air blower 13 is a silo fan will be described.

[0073] As shown in Figs. 1 and 2, the air blower 13 is provided in the upper surface of the housing 12. The air blower 13 is provided in the upper surface of the housing 12. Figure 5 Figure 6 As shown in Figs. 1 and 2, the air blower 13 is provided in the upper surface of the housing 12. The air blower 13 is provided in the upper surface of the housing 12.

[0074] The housing 131 has a horn 139, a second suction port 137, a protrusion 136, a blowout port 138, a fan housing portion 135, and a spiral surface 131a. The material of the housing 131 is not particularly limited, and is, for example, a metal plate.

[0075] The horn 139 is formed in the side of the fan housing portion 135 on the first side surface S1 side. The horn 139 is integrally formed with the housing 131. The second suction port 137 is formed in the inside of the horn 139. The inner peripheral portion of the second suction port 137 is formed in a horn shape in which the inner diameter is enlarged toward the first side surface S1 side from the second side surface S2 side in the axial direction of the rotation shaft 141. In plan view, the horn 139 is disposed at a position closer to the second side surface S2 than the center C of the upper surface. The horn 139 promotes the suction of air toward the fan rotor 132.

[0076] The second suction port 137 sucks indoor air that has entered the housing 12 from the first suction port 12a.

[0077] The protrusion 136 constitutes the blowout port 138.

[0078] The blowout port 138 is connected to the exhaust port 12b of the housing 12. The blowout port 138 is directed toward the rear surface side, or toward the rear surface side and toward the obliquely lower side. The blowout port 138 blows out the sucked indoor air.

[0079] The fan housing portion 135 houses the fan rotor 132.

[0080] The spiral surface 131a is a curved surface along the circumferential direction of the fan rotor 132.

[0081] The fan rotor 132 has a plurality of blades 140, a circular plate (not shown) that supports the plurality of blades 140, and a rotation shaft 141.

[0082] The plurality of blades 140 are disposed at equal intervals along the outer periphery of the circular plate. The plurality of blades 140 are formed in a cylindrical shape.

[0083] One end of the rotation shaft 141 is disposed at the center of the circular plate. The other end of the rotation shaft 141 is connected to the shaft core portion of the motor 50. ​

[0084] The motor 50 is disposed on the radially inner side of the fan rotor 132. The motor 50 is disposed facing the second side S2 of the housing 12.

[0085] (4) Operational movements

[0086] Next, we will explain the heating operation, cooling operation, and exhaust operation of the air conditioning system, which are executed by the control department.

[0087] (4-1) Heating Operation

[0088] When the control unit receives a control signal from the remote controller 8 instructing the operation of heating mode, it initiates heating mode operation. During heating mode operation, the control unit switches the four-way switching valve 23 to the first state (see reference). Figure 2 (The dotted line). Additionally, the control unit sets the heat source expansion valve 25 to the opening degree corresponding to the set temperature received from the remote controller 8, causing the compressor 21 to operate and drive the fan rotor 32 to rotate. Thus, the heat source heat exchanger 24 functions as an evaporator for the refrigerant, and the heat exchanger 31 functions as a condenser for the refrigerant.

[0089] (4-2) Refrigeration Operation

[0090] When the control unit receives a control signal from the remote controller 8 instructing the refrigeration operation, it initiates the refrigeration operation. During refrigeration operation, the control unit switches the four-way switching valve 23 to the second state (see reference). Figure 2 (Solid line). In addition, the control unit sets the heat source expansion valve 25 to the opening degree corresponding to the set temperature received from the remote controller 8, causing the compressor 21 to operate and drive the fan rotor 32 to rotate. Thus, the heat source heat exchanger 24 functions as a condenser for the refrigerant, and the heat exchanger 31 functions as an evaporator for the refrigerant.

[0091] (4-3) Exhaust Operation

[0092] The control unit starts exhaust operation when it receives a control signal from the remote controller 8 regarding the execution instruction for exhaust operation.

[0093] like Figure 1As shown, the air exhaust device 101 is arranged next to the air conditioner indoor unit 3. An air flow is generated by driving the fan rotor 132 of the air exhaust device 101. The fan rotor 132 sucks indoor air into the housing from the first suction port 12a by rotating around the rotation shaft 141. The fan rotor 132 also sucks air into the housing 131 from the second suction port 137. The air sucked from the second suction port 137 by the rotation of the fan rotor 132 flows along the inner wall of the spiral surface 131a of the housing 131, and is guided to the blowout port 138. The guided air is exhausted through the air exhaust flow path 51 formed by the exhaust port 12b, the hose 46, and the outdoor exhaust port 43c. In this way, the indoor air is taken into the air exhaust device 101, and is exhausted to the outdoor.

[0094] The ventilation operation can be performed by the air exhaust device 101 alone, and therefore, even during the ventilation operation, the refrigerant circuit 10 can perform the heating operation or the cooling operation.

[0095] (5) Features

[0096] (5-1)

[0097] In the conventional air exhaust device before the present application, there is a case where the suction port of the air exhaust device is blocked by the air blower when viewed from above. In this case, the sucked air hits the air blower, and abnormal noise is generated.

[0098] Here, the farther the air blower 13 is from the first suction port 12a, the more the resistance of the air is suppressed, and the more smoothly the air is sucked into the air blower 13. In the air exhaust device 101 of the above-described embodiment, when viewed from above, the air blower 13 is close to the second side surface S2 side of the housing 12, and the first suction port 12a is close to the first side surface S1 side of the housing 12, and therefore, the air blower 13 can be made to be farther from the first suction port 12a. Therefore, the air blower 13 can be suppressed from becoming the resistance of the sucked air. As a result, the generation of abnormal noise can be suppressed.

[0099] Further, the area of the first suction port 12a on the upper surface of the air exhaust device 101 can be reduced, and therefore, the area of the filter arranged at the first suction port 12a can be reduced.

[0100] (5-2)

[0101] Here, the first suction port 12a does not overlap the air blower 13. Therefore, the housing 131 of the air blower 13 can be further suppressed from becoming the resistance of the sucked air. As a result, the generation of abnormal noise can be further suppressed.

[0102] Further, the height of the housing 131 can be increased so that the top of the housing 131 reaches the vicinity of the upper surface of the housing 12. Thus, the diameter of the fan rotor 132 can be increased.

[0103] (5-3)

[0104] Here, the entirety of the first suction port 12a is positioned on the first side S1 side from the center C of the upper surface when viewed from above. Therefore, the first suction port 12a can be reduced in overlap with the air blower 13 when viewed from above.

[0105] (5-4)

[0106] Here, the housing 131 of the air blower 13 has a bell mouth 139. The bell mouth 139 is formed with a second suction port 137. The second suction port 137 sucks indoor air that has entered the housing 12 from the first suction port 12a. The bell mouth 139 is disposed on the second side S2 side from the center C of the upper surface when viewed from above. Therefore, the sucked air can be smoothly fed to the air blower 13.

[0107] (5-5)

[0108] Here, the air blower 13 is disposed adjacent to the air conditioning indoor unit 3 that performs temperature adjustment of the indoor air. The first suction port 12a is disposed on the side close to the air conditioning indoor unit 3. The air blower 13 is disposed on the side away from the air conditioning indoor unit 3. Therefore, by making the air blower 13 away from the air conditioning indoor unit 3, the influence of vibration of the air blower 13 on the air conditioning indoor unit 3 can be suppressed.

[0109] (6) Modification

[0110] (6-1) Modification A

[0111] The exhaust device 101 of the above-described embodiment is disposed on the right side of the air conditioning indoor unit 3 when viewed from the front. However, it is not particularly limited thereto. The exhaust device 101 can also be disposed on the left side of the air conditioning indoor unit 3 when viewed from the front.

[0112] (6-2) Modification B

[0113] In the exhaust device 101 of the above-described embodiment, the exhaust device 101 is powered by the air conditioning indoor unit 3, and the exhaust device 101 can also be activated at the time of air conditioning operation. However, it is not particularly limited thereto. The exhaust device 101 can also have a power source dedicated to the exhaust device 101. The exhaust device 101 can also be operated independently of the operation of the air conditioning indoor unit 3. In this case, the exhaust device 101 can also be provided with a remote controller for the exhaust device 101 that is separate from the remote controller 8.

[0114] The above describes the embodiments of the present disclosure, but it should be understood that various modifications of the modes and details can be made without departing from the spirit and scope of the present disclosure recited in the claims.

[0115] Explanation of Reference Numerals

[0116] 3 air conditioner indoor unit

[0117] 12 housing

[0118] 12a first suction port

[0119] 13 air supply fan

[0120] 101 exhaust device

[0121] 131 housing

[0122] 137 second suction port

[0123] 139 horn mouth

[0124] S1 first side surface

[0125] S2 second side surface

[0126] Prior art document

[0127] Patent document

[0128] Patent document 1: Japanese Patent No. 7135241

Claims

1. An exhaust device (101) configured adjacent to an air-conditioning indoor unit (3) that performs temperature adjustment of indoor air, in a room, to exhaust the indoor air from the room to the outside, wherein the exhaust device (101) comprises: a housing (12) having a first suction port (12a) formed in an upper surface thereof; and a supply fan (13) housed in the housing, having a casing (131) and a fan rotor (132), the casing (131) having a second suction port (137), the second suction port is an opening that sucks the indoor air that has entered the housing from the first suction port into the casing, in a plan view, the first suction port is located closer to a first side (SI) of the housing, and the supply fan is located closer to a second side (S2) of the housing, the second side (S2) being a side opposite to the first side.

2. The exhaust device according to claim 1, wherein in a plan view, the first suction port does not overlap the supply fan.

3. The exhaust device according to claim 1 or 2, wherein in a plan view, the entire first suction port is located closer to the first side than to a center of the upper surface.

4. The exhaust device according to claim 3, wherein the casing (131) of the supply fan has a bell mouth (139) that forms the second suction port (137), in a plan view, the bell mouth is located closer to the second side than to the center of the upper surface.

5. The exhaust device according to claim 1 or 2, wherein the first suction port is located on a side closer to the air-conditioning indoor unit, the supply fan is located on a side farther from the air-conditioning indoor unit.

6. The exhaust device according to claim 1 or 2, wherein the exhaust device is powered by the air-conditioning indoor unit.

7. The exhaust device according to claim 1, wherein a bell mouth (139) having the second suction port is formed in the casing of the supply fan.

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