Total heat exchange ventilation device

Abstract

The objective of the present disclosure is to provide a total heat exchange ventilation device that has a total heat exchange function and operates in a time-division manner, thereby making it possible to reduce the thermal load of an air conditioner. A total heat exchange ventilation device according to one embodiment of the present disclosure is attached to an air conditioner, and is characterized by comprising a total heat exchanger provided with a sensible heat unit, a first air supply / exhaust port provided indoors, a second air supply / exhaust port provided outdoors, and a blower unit that causes air to pass through the total heat exchanger and that blows air in a time-division manner in which air supply and exhaust from the first air supply / exhaust port and the second air supply / exhaust port are switched in conjunction with one another, wherein the blower unit performs air supply and exhaust from the first air supply / exhaust port and the second air supply / exhaust port through an opening in a wall used by the air conditioner.

Description

Total heat exchange ventilation system

[0001] This application claims priority to Japanese Patent Application No. 2024-082253, filed May 21, 2024, the contents of which are incorporated herein by reference.

[0002] Conventionally, ventilation devices have been disclosed.

[0003] For example, Patent Document 1 discloses a ventilation device that combines an indoor unit of a room air conditioner with a ventilation fan. It also discloses that outside air taken in through a wall hole for the air conditioner is released toward the air intake port of the indoor unit of the air conditioner, where it is purified by an air filter in the indoor unit and then processed by the air conditioner.

[0004] Japanese Patent Application Laid-Open No. 2003-227642

[0005] However, the above-mentioned ventilation device only has an exhaust ventilation function and does not reduce the thermal load of the air conditioner.

[0006] In view of the above problem, one aspect of the present disclosure aims to provide a total heat exchange ventilation device that has a total heat exchange function and operates in a time-sharing manner, thereby reducing the thermal load of an air conditioner.

[0007] One aspect of the present disclosure is a total heat exchange ventilation device attached to an air conditioner, comprising: a total heat exchanger with a sensible heat section; a first intake and exhaust port provided indoors; a second intake and exhaust port provided outdoors; and a blower section that passes air through the total heat exchanger and blows air using a time-division system in which the intake and exhaust of air from the first intake and exhaust port and the second intake and exhaust port are switched in tandem, and is characterized in that the blower section supplies and exhausts air from the first intake and exhaust port and the second intake and exhaust port through an opening in a wall used in the air conditioner.

[0008] As described above, according to one aspect of the present disclosure, it is possible to provide a total heat exchange ventilation device that has a total heat exchange function and operates in a time-sharing manner, thereby reducing the thermal load of an air conditioner.

[0009] FIG. 1 is a perspective view schematically illustrating a total heat exchange ventilation device according to the present disclosure. FIG. 2 is a side view schematically illustrating a total heat exchange ventilation device according to the present disclosure. FIG. 3 is a diagram illustrating an installation pattern of a total heat exchange ventilation device according to the present disclosure. FIG. 4 is a diagram illustrating another installation pattern of a total heat exchange ventilation device according to the present disclosure. FIG. 5 is a cross-sectional view schematically illustrating a humidity control material. FIG. 6A is a diagram illustrating a turbofan, showing air being exhausted from the indoor side to the outdoor side. FIG. 6B is a diagram illustrating a turbofan, showing air being supplied from the outdoor side to the indoor side. FIG. 7A is a diagram illustrating a first sirocco fan and a second sirocco fan provided in an indoor blower unit, showing air being supplied from the outdoor side to the indoor side. FIG. 7B is a diagram illustrating a first sirocco fan and a second sirocco fan provided in an indoor blower unit, showing air being exhausted from the indoor side to the outdoor side. FIG. 8A is a diagram illustrating a first sirocco fan provided in an indoor blower unit, showing air being supplied from the outdoor side to the indoor side. FIG. 8B is a diagram showing a first sirocco fan provided in the indoor blower unit, and shows how air is exhausted from indoors to outdoors. FIG. 9A is a diagram showing a first sirocco fan provided in the indoor blower unit and a second sirocco fan provided in the outdoor blower unit, and shows how air is supplied from outdoors to indoors. FIG. 9B is a diagram showing a first sirocco fan provided in the indoor blower unit and a second sirocco fan provided in the outdoor blower unit, and shows how air is exhausted from indoors to outdoors. FIG. 10A is a diagram showing a structure in which two or more fans are arranged in series, and shows how air is supplied from outdoors to indoors. FIG. 10B is a diagram showing a structure in which two or more fans are arranged in series, and shows how air is exhausted from indoors to outdoors.

[0010] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Note that the embodiments described below do not unduly limit the content of the present disclosure described in the claims, and not all of the configurations described in the embodiments are necessarily essential as means for solving the problems of the present disclosure.

[0011] Fig. 1 is a perspective view schematically showing a total heat exchange ventilator 100 according to the present disclosure. Fig. 2 is a side view schematically showing the total heat exchange ventilator 100 according to the present disclosure. The total heat exchange ventilator 100 according to the present disclosure is attached to an air conditioner 1 as shown in Fig. 1. Furthermore, as shown in Figs. 1 and 2, the total heat exchange ventilator 100 according to the present disclosure includes a housing 50, a total heat exchanger 10, a first air intake and exhaust port 31, a second air intake and exhaust port 32, and an air blower 40.

[0012] The total heat exchange ventilation device 100 is used in a house, a building, an automobile, etc. The total heat exchange ventilation device 100 is not limited to being installed in a house, a building, an automobile, etc., and may also be installed around a wall 6 that separates a space.

[0013] The configuration of the total heat exchange ventilation device 100 according to the present disclosure will be described below.

[0014] The housing 50 is a cover that houses the total heat exchanger 10, the blower 40, and the like.

[0015] The total heat exchanger 10 is provided in a housing 50. The total heat exchanger 10 also includes a sensible heat section 13. The "sensible heat section" refers to a heat exchanger that mainly has a temperature exchange function.

[0016] Preferably, the total heat exchanger 10 further includes a latent heat section 14. The term "latent heat section" refers to a heat exchanger that primarily has a humidity exchange function. The latent heat section 14 includes a humidity control material 20, which will be described later, and releases or absorbs moisture from the total heat exchanger 10 depending on the ambient temperature.

[0017] The sensible heat section 13 and the latent heat section 14 may be arranged in series in the air blowing direction within the total heat exchanger 10 as shown in Fig. 2, or may be arranged in parallel (up and down) in the air blowing direction. Furthermore, one or more sensible heat sections 13 and latent heat sections 14 may be arranged within the total heat exchanger 10.

[0018] The sensible heat section 13 and the latent heat section 14 may be arranged in series in the air blowing direction, or may be arranged in parallel above and below the first total heat exchanger 10 and the second total heat exchanger 10. Furthermore, the sensible heat section 13 and the latent heat section 14 may be made of the same material or different materials.

[0019] The total heat exchanger 10 may have different opening ratios and opening sizes in the sensible heat section 13 and the latent heat section 14 .

[0020] The total heat exchanger 10 is preferably made of a metal with high thermal conductivity, such as aluminum, iron, or copper, to facilitate heat exchange. Other preferable materials include ceramics such as alumina, mullite, or cordierite, and porous materials with a large surface area, such as nonwoven fabric made of paper or fiber.

[0021] The total heat exchanger 10 can be a cylindrical or prismatic (block) type. The cylindrical type has high thermal resistance in the same direction within the circular plane, while the prismatic (block) type has high thermal resistance in different directions within the square plane.

[0022] The total heat exchanger 10 preferably has a pleated structure, a corrugated structure, or a honeycomb structure, which increases the surface area of ​​the total heat exchanger 10 and allows for efficient heat exchange of the blown air, thereby achieving a desired temperature and humidity, such as low temperature and low humidity.

[0023] The first air intake and exhaust port 31 is provided indoors. The first air intake and exhaust port 31 is also provided in the housing 50. The first air intake and exhaust port 31 allows the air that has passed through the total heat exchanger 10 to be supplied to and exhausted indoors.

[0024] The second air intake and exhaust port 32 is provided outdoors. The second air intake and exhaust port 32 is also provided in an outdoor ventilation hood 70. The second air intake and exhaust port 32 allows the air that has passed through the total heat exchanger 10 to be supplied to and exhausted outdoors.

[0025] The blower 40 passes air through the total heat exchanger 10 and blows air in a time-division manner, in which the intake and exhaust of air from the first intake and exhaust port 31 and the second intake and exhaust port 32 are switched in tandem. The time-division manner is a method in which the air flow direction is switched between intake and exhaust in tandem over time. For example, the blower 40 circulates air through the total heat exchanger 10 for a certain period of time, circulating air from outdoors to indoors. Then, after the certain period of time has elapsed, the blower 40 circulates air through the total heat exchanger 10, circulating air from indoors to outdoors.

[0026] In this way, the air flow direction of the blower 40 switches between intake and exhaust in coordination with the passage of time. Time division can be achieved by controlling the intake and exhaust of the blower 40 using a control unit (not shown). The control unit (not shown) may be provided in the total heat exchange ventilator 100 or may be a separate unit. If the control unit is a separate unit, it may be connected to the total heat exchange ventilator 100 wirelessly using a communication standard such as WiFi, Bluetooth, Z-Wave, Zigbee, or Matter, or it may be connected to the total heat exchange ventilator 100 by wire.

[0027] In this way, according to the total heat exchange ventilation device 100 of the present disclosure, the blower section 40 performs total heat exchange of both intake air and exhaust air in a time-division manner, making it possible to perform total heat ventilation with a single total heat exchange ventilation device 100. Therefore, the total heat exchange ventilation device 100 of the present disclosure enables efficient total heat exchange.

[0028] The blower unit 40 may switch between supplying air and exhausting air using one blower unit 40, or may switch between supplying air and exhausting air using two (two or more) blowers 40. When two blowers 40 are provided, rather than one blower unit 40 supplying air and the other blower unit 40 exhausting air, both blowers 40 supply air and then exhaust air after a certain time has passed. Note that one blower unit 40 may be operating to supply air or exhaust air, while the other is stopped.

[0029] The blower 40 preferably uses a fan that can be switched between forward and reverse rotation, such as a reversible flow fan. Air can be taken in and exhausted by switching the blower 40 between forward and reverse rotation. The blower 40 preferably uses a propeller fan, a sirocco fan, or a turbo fan. A propeller fan is preferred when a large amount of air is required. A sirocco fan is preferred when a large amount of air or static pressure is required. A turbo fan is preferred when static pressure is particularly required.

[0030] Furthermore, the blower 40 supplies and exhausts air from the first air supply / exhaust port 31 and the second air supply / exhaust port 32 through the opening 3 in the wall 6 used in the air conditioner 1. In this way, there is no need to provide a separate opening.

[0031] An example of the air conditioner 1 is an air conditioner. The air conditioner 1 is connected to an outdoor unit via an opening 3 in a wall 6, an indoor pipe 4, and an outdoor pipe 5.

[0032] The opening 3 in the wall 6 may be an opening 3 for the air conditioner 1 (an opening for connecting a drain, a refrigerant pipe, a power supply, etc. to the outdoor unit side).

[0033] Fig. 3 is a diagram showing an installation pattern of the total heat exchange ventilation apparatus 100 according to the present disclosure. The total heat exchange ventilation apparatus 100 according to the present disclosure may be installed integrally with the air conditioner 1, as shown in Fig. 3. Alternatively, the total heat exchange ventilation apparatus 100 according to the present disclosure may be installed separately from the air conditioner 1, as shown in Fig. 4. In this case, the air conditioner 1 and the total heat exchange ventilation apparatus 100 are connected by a pipe 4.

[0034] The total heat exchange ventilation device 100 according to the present disclosure may be operated in conjunction with the air conditioner 1. In addition, some components of the total heat exchange ventilation device 100 according to the present disclosure, such as a power supply and a drive motor, may be shared with the air conditioner 1.

[0035] In this way, the total heat exchange ventilation device 100 according to the present disclosure has a total heat exchange function and operates in a time-sharing manner, thereby reducing the thermal load on the air conditioner 1.

[0036] The first air intake / exhaust port 31 is preferably disposed near the air intake port 2 provided in the air conditioner 1. This allows for efficient heat exchange and further reduces the thermal load on the air conditioner 1.

[0037] Next, the humidity conditioner 20 will be described.

[0038] The humidity control material 20 absorbs or releases moisture.

[0039] The humidity control material 20 also adjusts the amount of moisture contained in the air. The humidity control material 20 has the property of absorbing (moisture absorption) moisture when the surrounding relative humidity is relatively high compared to the equilibrium humidity, and conversely, releasing (moisture desorption) moisture when the surrounding relative humidity is relatively low. Unlike desiccants such as typical type A silica gel, the humidity control material 20 repeatedly absorbs and desorbs moisture, so in principle it is effective semi-permanently.

[0040] Each component of the humidity conditioner 20 will be described below.

[0041] 5, the humidity conditioner 20 includes a water absorbent 21 containing a resin and / or a clay mineral, and a humidity control component 22. The water absorbent 21 of the humidity conditioner 20 can retain the humidity control component 22. Depending on the humidity of the environment in which the humidity conditioner 20 is placed, the humidity conditioner 20 absorbs moisture contained in the air of the location to absorb moisture, or releases moisture contained in the humidity conditioner 20 into the air to release moisture.

[0042] Note that "humidity control" means adjusting the relative humidity of the surrounding air so that it approaches the equilibrium humidity band of the humidity control material 20. Specifically, for example, if the equilibrium humidity of the humidity control material 20 is 50% RH, the humidity control material 20 absorbs (absorbs) moisture when the relative humidity of the surrounding air is higher than 50% RH, and releases (desorbs) moisture when the relative humidity of the surrounding air is lower than 50% RH. Typically, the predetermined relative humidity band correlates with the material of the humidity control material 20. Specifically, for example, the predetermined relative humidity band correlates with the moisture content in the humidity control component 22.

[0043] The humidity-conditioning component 22 may be held not only in the water absorbent body 21 but also in a support that supports the humidity-conditioning material 20 .

[0044] The moisture-conditioning component 22 may be present inside the water absorbent body 21, or may be present separately and mixed.

[0045] Specific examples of the humidity-conditioning component 22 include salts, such as sodium formate, potassium formate, sodium propionate, potassium propionate, potassium carbonate, calcium carbonate, sodium acetate, potassium acetate, lithium acetate, sodium lactate, potassium lactate, calcium chloride, lithium chloride, magnesium chloride, potassium chloride, sodium chloride, zinc chloride, aluminum chloride, magnesium chloride, lithium bromide, calcium bromide, potassium bromide, sodium hydroxide, and sodium pyrrolidone carboxylate. Among these, carboxylates (sodium formate, potassium formate, sodium propionate, potassium propionate, carbonates, sodium acetate, and potassium acetate) that have a threshold value for humidity-conditioning properties at a specific humidity are preferred. At least one of these metal salts is preferred.

[0046] The humidity control component 22 may contain a polyhydric alcohol in addition to the above-mentioned salt.

[0047] Specific examples of polyhydric alcohols include glycerin, propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, and triethylene glycol. Among these, polyhydric alcohols having three or more hydroxyl groups, such as glycerin, are more preferably used. The polyhydric alcohol may form a dimer or a polymer. Furthermore, only one type may be contained, or two or more types may be contained.

[0048] The water absorbent body 21 has the function of retaining the humidity-conditioning component 22. Because the water absorbent body 21 retains the humidity-conditioning component 22, it is possible to realize a humidity-conditioning material 20 with a high ratio of surface area to volume. This makes it possible to increase the rate of moisture absorption or release. Therefore, it is possible to provide a humidity-conditioning material 20 with a high humidity-conditioning rate. Furthermore, the water absorbent body 21 is preferably in a powder or particulate form.

[0049] The water absorbent body 21 preferably contains at least one selected from the group consisting of a water-absorbent resin (particles, powder) and a clay mineral, which allows the water absorbent body 21 to suitably retain the humidity-conditioning component 22, thereby further enhancing the humidity-conditioning effect.

[0050] Specific examples of the water-absorbent resin material include ionic resins and nonionic resins. Examples of the ionic resin include alkali metal salts of polyacrylic acid (such as sodium polyacrylate) and starch-acrylate graft polymers, with alkali metal salts of polyacrylic acid being preferred. Specific examples of alkali metal salts of polyacrylic acid include sodium polyacrylate. Examples of the nonionic resin include vinyl acetate copolymers, maleic anhydride copolymers, polyvinyl alcohol, and polyalkylene oxides.

[0051] Specific examples of clay minerals include silicate minerals such as smectite, sepiolite, attapulgite, kaolinite perlite, and dolomite, and zeolites.

[0052] When the moisture-conditioning component 22 is present, the weight ratio of the total weight thereof to the water absorbent body 21 is preferably 1:1 to 3:7. This ensures appropriate amounts of the water absorbent body 21 and the moisture-conditioning component 22, further enhancing the moisture-conditioning function. Furthermore, if the proportion of the moisture-conditioning component 22 is too high, there is a high risk of water separation in the high humidity range, and if the proportion of the moisture-conditioning component 22 is too low, the moisture content of the moisture-conditioning component 22 may be reduced.

[0053] The humidity-conditioning material 20 may be in the form of a powder, particle, or block, or the humidity-conditioning component 22 and the water-absorbing body 21 may be supported on a breathable substrate so that they can be efficiently brought into contact with air.

[0054] The humidity conditioner 20 also includes B-type silica gel, polymeric sorption material, and the like.

[0055] A binder may be used to facilitate adhesion of the humidity conditioner 20 to the surface of the total heat exchanger 10. The binder may be any material that can be bonded by thermal fusion, and examples of such binders include thermoplastic resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyvinyl acetate, saponified ethylene-vinyl acetate copolymer, polyvinyl alcohol, polyester, polyamide, polyurethane, and ionomer resin, as well as modified products thereof. Preferably, such binders include thermoplastic resins such as polyvinyl acetate, saponified ethylene-vinyl acetate copolymer, polyvinyl alcohol, polyester, polyamide, polyurethane, and ionomer resin, as well as modified products thereof. These may be used alone or in combination of two or more.

[0056] A heater may be provided to release the moisture from the moisture-absorbing humidity-conditioning material 20 and regenerate the humidity-conditioning material 20 .

[0057] As shown in FIG. 2 , the blower 40 included in the total heat exchange ventilation device 100 according to the present disclosure may include a first blower 41 and a second blower 42. Alternatively, a single blower 40 may be provided. The first blower 41 is connected to the first opening 11 of the total heat exchanger 10 via a connecting pipe 45. The first opening 11 is provided on the indoor side of the total heat exchanger 10. The second blower 42 is connected to the second opening 12 of the total heat exchanger 10 via a connecting part 60 (pipe) provided at the opening 3 of the wall 6. At this time, the first blower 41 and the second blower 42 circulate air in one direction and switch to the other direction in a time-sharing manner. In other words, the first blower 41 and the second blower 42 exhaust air and switch to supply air in a time-sharing manner. It should be noted that one of the first blower 41 and the second blower 42 may be in operation while the other is stopped.

[0058] Fig. 6A is a diagram showing a turbofan, illustrating how air is exhausted from the indoor side to the outdoor side. Fig. 6B is a diagram showing a turbofan, illustrating how air is supplied from the outdoor side to the indoor side. The blower unit 40 used in the total heat exchange ventilation device 100 according to the present disclosure may use a turbofan.

[0059] As shown in Figure 6A, the turbofan circulates air from the indoor side to the outdoor side as indicated by the arrows. After a certain period of time has passed, as shown in Figure 6B, the turbofan circulates air from the outdoor side to the indoor side as indicated by the arrows. As shown in Figures 6A and 6B, two turbofans are arranged on the axis along which the air flows.

[0060] This allows the turbo fan to maintain high static pressure while increasing the air volume, which cannot be achieved with a casing, compared to a sirocco fan. Also, since two fans are placed on the axis through which air flows, the device can be made smaller.

[0061] As shown in FIGS. 6A and 6B , the turbofan that constitutes the blower 40 (first blower 41, second blower 42) is provided with a first inhibiting portion 43a that inhibits the rotation of the first fin 44a and a second inhibiting portion 43b that inhibits the rotation of the second fin 44b. When the first fin 44a is rotating and the second fin 44b is stopped, the second inhibiting portion 43b inhibits the rotation of the second fin 44b. When the second fin 44b is rotating and the first fin 44a is stopped, the first inhibiting portion 43a inhibits the rotation of the first fin 44a. The inhibiting portion moves back and forth using the pressure difference caused by the air flow, switching the flow path and preventing airflow from passing through the stopped blower 40. This prevents the motor from being overloaded by airflow flowing into the stopped side and causing the fins to rotate.

[0062] 7A is a diagram showing the indoor blower 40 provided with a first sirocco fan 41a and a second sirocco fan 41b, and shows how air is supplied from the outdoors to the indoors. Fig. 7B is a diagram showing the indoor blower 40 provided with a first sirocco fan 41a and a second sirocco fan 41b, and shows how air is exhausted from the indoors to the outdoors.

[0063] As shown in Figures 7A and 7B, the blower unit 40 includes a first sirocco fan 41a and a second sirocco fan 41b indoors, a connecting pipe 45, and a damper 46. The first sirocco fan 41a and the second sirocco fan 41b supply and exhaust air indoors. The connecting pipe 45 connects the first sirocco fan 41a and the second sirocco fan 41b to the first opening 11 on the indoor side of the total heat exchanger 10. The damper 46 branches the air into a first flow path S1 and a second flow path S2.

[0064] As shown in Figure 7A, the first sirocco fan 41a circulates air from outdoors to indoors. Meanwhile, after a certain period of time has elapsed, the second sirocco fan 41b circulates air from indoors to outdoors, as shown in Figure 7B. This allows the air blowing unit 40 to be concentrated indoors. Furthermore, both high static pressure and high airflow can be achieved.

[0065] Although the first sirocco fan 41 a and the second sirocco fan 41 b are provided indoors in the above embodiment, they may also be provided outdoors.Furthermore, the first sirocco fan 41 a and the second sirocco fan 41 b may also be provided both indoors and outdoors.

[0066] Fig. 8A is a diagram showing a first sirocco fan 41a provided in the indoor blower unit 40, and shows how air is supplied from the outdoors to the indoors. Fig. 8B is a diagram showing a first sirocco fan 41a provided in the indoor blower unit 40, and shows how air is exhausted from the indoors to the outdoors.

[0067] As shown in FIGS. 7A and 7B , the blower 40 includes a first connecting pipe 45a and a second connecting pipe 45b, a first connecting port 47a and a second connecting port 47b, a sirocco fan, and a damper 46. The first connecting pipe 45a and the second connecting pipe 45b are connected to the first indoor opening 11 of the total heat exchanger 10. The first connecting port 47a is provided on the first connecting pipe 45a. The second connecting port 47b is provided on the second connecting pipe 45b. The sirocco fan is provided between the first connecting pipe 45a and the second connecting pipe 45b via a third connecting pipe 45c. The damper 46 branches the flow path to the first connecting pipe 45a and the second connecting pipe 45b to switch between supply air and exhaust air from the first connecting port 47a and the second connecting port 47b. The first connection port 47a and the second connection port 47b are holes through which air can be supplied and exhausted.

[0068] As shown in FIG. 8A, the sirocco fan circulates air from outdoors to indoors. The air passes through the total heat exchanger 10, exits the first opening 11, passes through the second connecting pipe 45b, the third connecting pipe 45c, the sirocco fan, and the first connecting pipe 45a, and is discharged from the first connecting port 47a. Meanwhile, after a certain period of time has elapsed, the sirocco fan circulates air from indoors to outdoors, as shown in FIG. 8B. The air passes through the total heat exchanger 10, exits the first opening 11, passes through the first connecting pipe 45a, the sirocco fan, the third connecting pipe 45c, and the second connecting pipe 45b, and is discharged from the second connecting port 47b. This allows the air blowing unit 40 to be concentrated indoors. This also allows for both high static pressure and high airflow. Furthermore, a single air blowing unit 40 can be used for both intake and exhaust.

[0069] 9A is a diagram showing a state in which a first sirocco fan 41a is provided in the indoor blower 40 and a second sirocco fan 41b is provided in the outdoor blower 40, and shows how air is supplied from outdoors to indoors. FIG. 9B is a diagram showing a state in which a first sirocco fan 41a is provided in the indoor blower 40 and a second sirocco fan 41b is provided in the outdoor blower 40, and shows how air is exhausted from indoors to outdoors.

[0070] As shown in Figures 9A and 9B, indoors, the blower unit 40 includes a first sirocco fan 41a, a second sirocco fan 41b, a first connecting pipe 45a, a second connecting pipe 45b, a first damper 46a, and a second damper 46b. The first sirocco fan 41a supplies air indoors and exhausts it. The second sirocco fan 41b supplies air outdoors and exhausts it. In other words, the first sirocco fan 41a is installed indoors, and the second sirocco fan 41b is installed outdoors. The first connecting pipe 45a is installed indoors, and the second connecting pipe 45b is installed outdoors.

[0071] Indoors, the first connecting pipe 45a connects the first sirocco fan 41a to the first opening 11 on the indoor side of the total heat exchanger 10. The first connecting pipe 45a also has a first flow path S1 and a second flow path S2 therein. The first flow path S1 is connected to the sirocco fan, and the second flow path S2 is not connected to the sirocco fan.

[0072] On the other hand, outdoors, second connecting pipe 45b connects second sirocco fan 41b and first opening 11 via connecting portion 60. Second connecting pipe 45b also has a first flow path S1 and a second flow path S2 therein. First flow path S1 is connected to the sirocco fan, and second flow path S2 is not connected to the sirocco fan.

[0073] The first connecting pipe 45a and the second connecting pipe 45b each include a first flow path S1 and a second flow path S2.

[0074] 9A , the second sirocco fan 41b circulates air from the outdoors to the indoors. At this time, the first damper 46a closes the first flow path S1 of the first connecting pipe 45a, and the second damper 46b closes the second flow path S2 of the second connecting pipe 45b. The air then passes through the second sirocco fan 41b, the first flow path S1 of the second connecting pipe 45b, the second opening 12, the total heat exchanger 10, and the first opening 11, and is discharged indoors through the second flow path S2 of the first connecting pipe 45a.

[0075] 9B , the first sirocco fan 41a circulates air from indoors to outdoors. At this time, the first damper 46a closes the second flow path S2 of the first connecting pipe 45a, and the second damper 46b closes the first flow path S1 of the second connecting pipe 45b. The air then passes through the first sirocco fan 41a, the first flow path S1 of the first connecting pipe 45a, the first opening 11, the total heat exchanger 10, the second opening 12, and the second flow path S2 of the second connecting pipe 45b before being discharged outdoors.

[0076] This arrangement achieves both high static pressure and high air volume. In addition, since both the intake and exhaust air are operated by push action, the air volume distribution can be made the same for the intake and exhaust air.

[0077] Figure 10A is a diagram showing a structure in which two or more fans 48 are arranged in series, and shows how air is supplied from outdoors to indoors. Figure 10B is a diagram showing a structure in which two or more fans 48 are arranged in series, and shows how air is exhausted from indoors to outdoors.

[0078] 10A and 10B, the air blower 40 may have a structure in which two or more fans 48 are arranged in a series in the air blowing direction. As shown in Fig. 10A, the air blower 40 having two or more fans 48 arranged in a series circulates air from outdoors to indoors. On the other hand, as shown in Fig. 10B, the air blower 40 having two or more fans 48 arranged in a series circulates air from indoors to outdoors.

[0079] In this way, the device can be made smaller because the fan 48 with high static pressure can be installed on the shaft of the total heat exchanger 10. Also, the blower 40 can be arranged indoors.

[0080] 10A and 10B, the total heat exchanger 10 is preferably provided with diffuser pipes 15 serving as truncated cone-shaped air outlets at the first opening 11 on the indoor side of the total heat exchanger 10 and the second opening 12 on the outdoor side of the total heat exchanger 10. In this way, air from the connecting parts 60 serving as thin tubes can be uniformly ventilated into the total heat exchanger 10, enabling efficient heat exchange.

[0081] As described above, the total heat exchange ventilation device 100 according to the present disclosure has a total heat exchange function and operates in a time-sharing manner, thereby making it possible to reduce the thermal load of the air conditioner.

[0082] Although each embodiment and each example of the present disclosure have been described in detail above, it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novel features and effects of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure.

[0083] For example, a term that is described at least once in the specification or drawings together with a different term having a broader or equivalent meaning can be replaced with that different term anywhere in the specification or drawings. Furthermore, the configurations and operations of the total heat exchange ventilation device 100 and the total heat exchange ventilation system are not limited to those described in the embodiments and examples of the present disclosure, and various modifications are possible.

Claims

1. A total heat exchange ventilation device that is attached to an air conditioner, comprising: a total heat exchanger with a sensible heat section; a first intake and exhaust port provided indoors; a second intake and exhaust port provided outdoors; and a blower unit that passes air through the total heat exchanger and blows air in a time-division manner in which the intake and exhaust of air from the first intake and exhaust port and the second intake and exhaust port are switched in tandem, wherein the blower unit takes in and exhausts air from the first intake and exhaust port and the second intake and exhaust port through an opening in a wall used in the air conditioner.

2. The total heat exchange ventilation system according to claim 1, wherein the total heat exchanger further comprises a latent heat section having a humidity control material.

3. A total heat exchange ventilation system as described in claim 1, characterized in that the first air intake and exhaust port is arranged around an intake port provided in the air conditioner.

4. The total heat exchange ventilation device described in claim 1, characterized in that the blowing section comprises a first blowing section provided at a first opening on the indoor side of the total heat exchanger and a second blowing section provided at a second opening on the outdoor side, and the first blowing section and the second blowing section are turbofans.

5. The total heat exchange ventilation device described in claim 4, characterized in that the air blowing section is provided with a first inhibiting section that inhibits the rotation of a first fin provided in the air blowing section and a second inhibiting section that inhibits the rotation of a second fin, and when the first fin is rotating and the second fin is stopped, the second inhibiting section inhibits the rotation of the second fin, and when the second fin is rotating and the first fin is stopped, the first inhibiting section inhibits the rotation of the first fin.

6. The total heat exchange ventilation device described in claim 1, characterized in that the air blowing section comprises a first sirocco fan and a second sirocco fan that supply and exhaust air indoors, a connecting pipe that connects the first sirocco fan and the second sirocco fan to a first opening on the indoor side of the total heat exchanger and has a first flow path and a second flow path, and a damper that branches the first flow path and the second flow path.

7. The total heat exchange ventilation device described in claim 1, characterized in that the air blowing section comprises a first connecting pipe and a second connecting pipe connected to a first opening on the indoor side of the total heat exchanger, a first connecting port provided on the first connecting pipe and a second connecting port provided on the second connecting pipe, a sirocco fan provided between the first connecting pipe and the second connecting pipe, and a damper that branches the flow path to the first connecting pipe and the second connecting pipe to switch between intake air and exhaust air from the first connecting port and the second connecting port.

8. The total heat exchange ventilation device described in claim 1, characterized in that the air blowing section comprises: a first sirocco fan that supplies and exhausts air indoors; a second sirocco fan that supplies and exhausts air outdoors; a first connecting pipe that connects the first sirocco fan to a first opening on the indoor side of the total heat exchanger and has a first flow path connected to the first sirocco fan and a second flow path not connected to the first sirocco fan; a second connecting pipe that connects the second sirocco fan to the first opening and has a first flow path connected to the first sirocco fan and a second flow path not connected to the second sirocco fan; and a first damper and a second damper that branch the first flow path and the second flow path.

9. A total heat exchange ventilation system as described in claim 1, characterized in that the blower section has a structure in which two or more fans are arranged in series in the air blowing direction.

10. A total heat exchange ventilation device as described in claim 1, characterized in that the total heat exchanger has a first opening on the indoor side of the total heat exchanger and a second opening on the outdoor side of the total heat exchanger, each of which has a truncated cone-shaped air outlet.

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