WO2022264443A1

WO2022264443A1 - Dehumidifier

Info

Publication number: WO2022264443A1
Application number: PCT/JP2021/037675
Authority: WO
Inventors: 直毅加藤; 好孝明里; 優太 ▲高▼橋; 元露木
Original assignee: 三菱電機株式会社; 三菱電機ホーム機器株式会社
Priority date: 2021-06-18
Filing date: 2021-10-12
Publication date: 2022-12-22
Also published as: CN117412801A; TWI801178B; TW202300828A; JPWO2022264443A1

Abstract

This dehumidifier comprises: a housing which has an inlet and an outlet; an air purifying filter; a dehumidifying means having a dehumidifying unit which removes moisture from the air; an air-blowing means which generates air flow from the inlet to the outlet; an indoor humidity detecting means which detects the relative humidity of indoor air; an indoor air pollution detecting means which detects air pollution which is the degree of pollution in the indoor air; a first air passage in which the air which has entered through the inlet passes through the air purifying filter, the dehumidifying unit, and the air-blowing means and is expelled through the outlet; a second air passage in which the air which has entered through the inlet passes through the dehumidifying unit and the air-blowing means and is expelled through the outlet, without passing through the air purifying filter; an opening and closing means which adjusts the openness of the second air passage; and a control means which changes the openness of the opening and closing means according to the relative humidity and the air pollution.

Description

dehumidifier

The present disclosure relates to dehumidifiers.

The air purifier disclosed in Patent Document 1 below includes a main body case having an internal space, and a blowing unit provided inside the main body case and allowing outside air to flow in from both sides of the main body case via a single blower fan. , an air purifying part that purifies air introduced from one side of the body case; and a dehumidifying part that removes moisture from the air that enters from the other side of the body case by means of a dehumidifying rotor. This air purifier has either a dehumidifying function or an air purifying function by using the first and second opening/closing members to block the inflow of air from one of both side surfaces of the main body case. Either or both are selectively done according to the preference of the user.

WO2010/047550

In Patent Document 1, the user must select between the dehumidifying operation and the air cleaning operation, so there is a problem that appropriate operation cannot always be performed.

The present disclosure has been made to solve the problems described above, and aims to provide a dehumidifier that can more appropriately perform the dehumidifying operation and the air cleaning operation.

A dehumidifier according to the present disclosure includes a housing having a suction port and a discharge port, an air cleaning filter, dehumidifying means having a dehumidification unit for removing moisture in the air, and generating an airflow from the suction port to the discharge port. indoor humidity detecting means for detecting the relative humidity of the indoor air; indoor air pollution level detecting means for detecting the air pollution level of the indoor air; The first air passage that passes through the filter, the dehumidifying part, and the air blowing means and is blown out from the outlet, and the air that enters from the suction opening passes through the dehumidifying part and the air blowing means without passing through the air cleaning filter. Then, the opening degree of the opening and closing means is changed according to the second air passage blown out from the outlet, the opening and closing means for adjusting the opening degree of the second air passage, and the relative humidity and the degree of air pollution. and a control means.

According to the present disclosure, it is possible to provide a dehumidifier that can more appropriately perform the dehumidifying operation and the air cleaning operation.

2 is a rear view of the dehumidifier according to Embodiment 1; FIG. FIG. 2 is a cross-sectional side view of the dehumidifier according to Embodiment 1 taken along line AA in FIG. 1; FIG. 2 is a cross-sectional plan view of the dehumidifier according to Embodiment 1 taken along line BB in FIG. 1; 4 is a flow chart showing processing during dehumidifying air cleaning automatic operation according to Embodiment 1. FIG. It is a graph which shows the relationship between the opening opening degree of a flap, dehumidification capability, and air cleaning capability. 5 is a graph showing the relationship between the opening degree of the flap, the noise value, the dehumidifying ability, the air cleaning ability, and the number of revolutions of the fan 21. FIG. 9 is a flow chart showing processing during dehumidifying air cleaning automatic operation according to Embodiment 2. FIG. 10 is a flow chart showing processing during dehumidifying air cleaning automatic operation according to Embodiment 3. FIG. It is a graph which shows the relationship between the opening opening degree of a flap, the set value of fan rotation speed, dehumidification ability, and air cleaning ability.

Embodiments will be described below with reference to the drawings. Elements that are common or correspond to each figure are denoted by the same reference numerals, and their explanations are simplified or omitted. In addition, when referring to angles in the present disclosure, when there is a dominant angle and a minor angle whose sum is 360 °, in principle, it refers to a minor angle, and there is an acute angle and an obtuse angle whose sum is 180 °. In principle, it refers to an acute angle.

Embodiment 1.
FIG. 1 is a rear view of the dehumidifier 1 according to Embodiment 1. FIG. FIG. 2 is a cross-sectional side view of the dehumidifier 1 according to Embodiment 1 taken along line AA in FIG. FIG. 3 is a cross-sectional plan view of the dehumidifier 1 according to Embodiment 1 taken along line BB in FIG. In the present disclosure, in principle, the dehumidifier 1 will be described with reference to the state in which the dehumidifier 1 is placed on a horizontal surface.

The dehumidifier 1 has a case 10. Case 10 is an example of a housing that forms the outer shell of dehumidifier 1 . The case 10 is formed, for example, in a self-supporting box shape. Wheels 20 for moving the dehumidifier 1 may be provided at the bottom of the case 10 .

In Embodiment 1, the case 10 has a front case 10a and a rear case 10b. The front case 10 a is a member that forms the front portion of the case 10 . The rear case 10 b is a member that forms the rear portion of the case 10 . The rear case 10b is fixed to the front case 10a by screws or the like.

A suction port 11 and a blowout port 12 are formed in the case 10 . The suction port 11 is an opening for taking in air from the outside of the case 10 to the inside. The air outlet 12 is an opening for blowing air from the inside of the case 10 to the outside. In Embodiment 1, suction port 11 is formed in the rear portion of case 10 . The suction port 11 is formed in the rear case 10b. Further, in Embodiment 1, the blowout port 12 is formed in the upper surface portion of the case 10 .

The dehumidifier 1 includes a suction port cover 11a that covers the suction port 11. The suction port cover 11a is formed in a mesh shape, for example. The suction port cover 11 a prevents foreign matter from entering the inside of the case 10 through the suction port 11 . The suction port cover 11a is, for example, detachably formed with respect to the rear case 10b.

The dehumidifier 1 has control means for controlling its operation. In the illustrated example, a board box 16 containing a control board (not shown) corresponding to control means and a power supply board (not shown) is arranged in the rear case 10b.

The dehumidifier 1 also includes a louver 13. The louver 13 is configured by a plate-like member. The louver 13 is for adjusting the direction in which the air is sent out from the blower outlet 12 . A louver 13 is arranged near the outlet 12 . The louver 13 is connected to a louver driving motor (not shown). When the louver drive motor operates, the posture of the louver 13 is changed. The control means controls the louver drive motor to adjust the direction in which the air is blown out from the outlet 12 .

The dehumidifier 1 also includes an operation display section 15 . The operation display section 15 is for the user to operate the dehumidifier 1 . Further, the operation display unit 15 displays the state of the dehumidifier 1 and the like to the user. Inside the case 10 facing the operation display section 15, an operation display board 15a for controlling the operation display section 15 is arranged. The operation display board 15a includes an operation switch for starting/stopping the operation of the dehumidifier 1, an operation mode switching switch for switching the operation mode to any of the dehumidifying operation mode, the air cleaning operation mode, or the dehumidifying air cleaning automatic operation mode, and a liquid crystal display. A display unit and the like are arranged. The dehumidifier 1 is operated via the operation display unit 15, and the state of the dehumidifier 1 and the like are displayed. The operation display board 15a is arranged in the rear case 10b.

The dehumidifier 1 also includes a fan 21 as a blowing means for sending air. The fan 21 is a device that draws air into the case 10 and sends the drawn air to the outside of the case 10 . The fan 21 is housed inside the case 10 . The fan 21 is a device that generates an air current from the inlet 11 to the outlet 12 in the air path from the inlet 11 to the outlet 12 .

A motor 21a is housed inside the case 10. The motor 21 a is a device that rotates the fan 21 . In Embodiment 1, the fan 21 and the motor 21a are arranged inside the front case 10a. That is, the fan 21 and the motor 21a are arranged on the front side of the dehumidifier 1 . Motor 21a is connected to fan 21 via shaft 21b. Rotational operation of the motor 21a is controlled by the control means.

The dehumidifier 1 also includes dehumidifying means. The dehumidifying means has a dehumidifying section that removes moisture contained in the air. Any dehumidifying means may be used as long as it can remove moisture in the air. The dehumidifier 1 in the present embodiment has a heat exchanger including an evaporator 31 that evaporates the refrigerant, a compressor (not shown) that compresses the refrigerant, and a decompression device (not shown) that decompresses the refrigerant. A heat pump type dehumidification means with a circuit is provided.

In the present disclosure, the dehumidifying means is not limited to heat pump type dehumidifying means. The dehumidifying means in the present disclosure may be, for example, a desiccant-type dehumidifying means for condensing moisture in the air removed by an adsorbent provided in the dehumidifying section in a heat exchanger.

The heat pump dehumidification means in the present embodiment further includes a condenser 32 as a heat exchanger that condenses the refrigerant. In this dehumidification means, the evaporator 31 and the condenser 32, which are heat exchangers, correspond to the dehumidification section. The evaporator 31 , the condenser 32 , the compressor, and the decompression device are housed in the case 10 . A compressor drive motor of the compressor is controlled by the control means. In this embodiment, the evaporator 31 and the condenser 32 are surrounded by the rear case 10b.

The evaporator 31, the compressor, the condenser 32, and the decompression device are connected in order via piping (not shown) or the like. Refrigerant flows through a refrigerant circuit formed by the evaporator 31, the compressor, the condenser 32, and the decompression device. The evaporator 31 and the condenser 32 are heat exchangers for exchanging heat between refrigerant and air. The compressor is a device that compresses the low-pressure refrigerant evaporated in the evaporator 31 into a high-pressure refrigerant. The decompression device is a device that decompresses the high-pressure refrigerant that has passed through the condenser 32 into a low-pressure refrigerant. A pressure reducing device is, for example, an expansion valve or a capillary tube.

Heat is exchanged between the air passing through the evaporator 31 and the refrigerant flowing through the evaporator 31 . A refrigerant decompressed by a decompression device flows through the evaporator 31 . Refrigerant having a lower temperature than the air taken into the case 10 flows through the evaporator 31 . The refrigerant flowing through the evaporator 31 absorbs heat from the air passing through the evaporator 31 . The air passing through the evaporator 31 loses heat to the refrigerant flowing through the evaporator 31 . That is, air passing through the evaporator 31 is cooled by the refrigerant flowing through the evaporator 31 . As a result, moisture contained in the air passing through the evaporator 31 is condensed. That is, condensation occurs. Moisture in the condensed air is removed from the air as liquid water. The removed water is stored, for example, in a tank 14 provided inside the case 10 . This tank 14 is configured to be removable from the case 10 . Air that has passed through the evaporator 31 is sent to the condenser 32 . Heat is exchanged between the air passing through the condenser 32 and the refrigerant flowing through the condenser 32 . The refrigerant flowing through condenser 32 is cooled by the air passing through condenser 32 . Air passing through the condenser 32 is heated by the refrigerant flowing through the condenser 32 . The air that has passed through the condenser 32 is in a drier state than the air outside the dehumidifier 1 . This dry air passes through the fan 21 . The air that has passed through the fan 21 is sent upward from the case 10 through the air outlet 12 . Thus, the dehumidifier 1 dehumidifies the air. Also, the dehumidifier 1 supplies dry air to the outside.

The rear case 10b has a lattice portion 10c. A plurality of openings through which the air flowing into the evaporator 31 passes is formed in the lattice portion 10c. When viewed in a direction parallel to the axis 21 b of the fan 21 , the total open area of the grid portion 10 c is approximately the same as the area of the evaporator 31 . The evaporator 31 and the grid portion 10c are arranged to face each other with a distance C therebetween with the first space 33 therebetween.

The dehumidifier 1 also includes an air cleaning filter for cleaning the air. In the present disclosure, "cleaning the air" corresponds to, for example, removing at least one of dust, odor, particles, droplets, and aerosols in the air. In the following description, dust, particles, droplets, and aerosols in the air may be collectively referred to as "dust". Dehumidifier 1 in the present embodiment includes HEPA filter 41 and activated carbon filter 42 as air cleaning filters. The HEPA filter 41 and activated carbon filter 42 are housed in the case 10 . In this embodiment, the HEPA filter 41 and the activated carbon filter 42 are accommodated in the rear case 10b.

The HEPA filter 41 is a filter that collects fine dust in the air. The activated carbon filter 42 is a filter that deodorizes odors in the air. The HEPA filter 41 and the activated carbon filter 42 are provided detachably from the rear case 10b. The activated carbon filter 42 is arranged to face the lattice portion 10c with the second space 34 therebetween and a distance D therebetween. A grid portion 10 c is positioned between the evaporator 31 and the activated carbon filter 42 .

In the present embodiment, an air passage leading from the suction port 11 to the blowout port 12 is formed inside the case 10 . In the air passage, from the suction port 11, the suction port cover 11a, the HEPA filter 41, the activated carbon filter 42, the evaporator 31, the condenser 32, and the fan 21 are arranged in this order.

In the present disclosure, the air entering from the suction port 11 passes through the HEPA filter 41 and the activated carbon filter 42 corresponding to the air cleaning filter, the evaporator 31 and the condenser 32 which are heat exchangers corresponding to the dehumidifying section, and the air blowing means. The airflow passage that passes through the corresponding fans 21 in this order and is blown out from the outlet 12 is referred to as a "first airflow passage". On the other hand, the air entering from the suction port 11 does not pass through the HEPA filter 41 and the activated carbon filter 42 corresponding to the air cleaning filter, and passes through the evaporator 31 and the condenser 32 which are heat exchangers corresponding to the dehumidifying section. , and the fan 21 corresponding to the air blowing means in this order and blowing out from the outlet 12 is referred to as a "second air path". In addition, in the present disclosure, the upstream side and the downstream side are defined by using the airflow flowing through the air path leading from the suction port 11 to the blowout port 12 . For example, the side on which the suction port 11 is located with respect to the heat exchanger is defined as the upstream side. Also, the side of the heat exchanger where the outlet 12 is located is the downstream side.

The first air passage includes a filter air passage 44 in which air flows through a HEPA filter 41 and an activated carbon filter 42 corresponding to an air cleaning filter. The second air passage includes a bypass air passage 43 that is an air passage that does not pass through the HEPA filter 41 and activated carbon filter 42 corresponding to the air cleaning filter. The bypass air passage 43 is an air passage through which air flows downstream without passing through the HEPA filter 41 and the activated carbon filter 42 .

As shown in FIG. 3, the bypass air passage 43 is adjacent to the filter air passage 44 in this embodiment. The bypass air passage 43 and the filter air passage 44 may be partitioned by a partition plate, a partition wall, or the like. By arranging the bypass air passage 43 adjacent to the filter air passage 44 in this way, the air passage in the dehumidifier 1 can be configured compactly, and the dehumidifier 1 can be miniaturized.

In this embodiment, the dehumidifier 1 includes a bypass air passage 43 adjacent to the left side of the HEPA filter 41 and the activated carbon filter 42, and a bypass air passage 43 adjacent to the right side of the HEPA filter 41 and the activated carbon filter 42. In this way, by providing the bypass air passage 43 adjacent to one side of the filter air passage 44 and the bypass air passage 43 adjacent to the other side of the filter air passage 44, the size of the dehumidifier 1 is reduced, This is more advantageous in achieving both reduction in pressure loss in the second air passage.

In the present embodiment, when the dehumidifier 1 is viewed from the back, that is, when viewed in a direction parallel to the shaft 21b of the fan 21, the filter air passage 44 has a rectangular shape. One bypass air passage 43 is provided along the left side of the rectangle of the filter air passage 44 , and the other bypass air passage 43 is provided along the right side of the rectangle of the filter air passage 44 . When the dehumidifier 1 is viewed from the back, the length of the bypass air passage 43 in the vertical direction, that is, the length of the bypass air passage 43 in the vertical direction, is equal to the length of the HEPA filter 41 in the vertical direction, that is, in the vertical direction. It is desirable that the length of the HEPA filter 41 is set to be approximately the same as that of the HEPA filter 41 of .

The airflow flowing through the bypass airway 43 and the airflow flowing through the filter airway 44 join in the space downstream of the activated carbon filter 42 . The airflow flowing through the bypass air passage 43 and the airflow flowing through the filter air passage 44 are divided into a first space 33 having a distance C from the lattice portion 10c and a second space 33 having a distance D from the lattice portion 10c. merges with the space 34 of . That is, the airflow flowing through the bypass airway 43 and the airflow flowing through the filter airway 44 join before the evaporator 31 arranged downstream of the activated carbon filter 42, and then flow through one airway.

The dehumidifier 1 according to the present embodiment has an air guide surface 43a provided in the second air passage. The airflow guide surface 43a guides the airflow of the second airflow path so that the airflow of the second airflow path approaches the center of the windward side surface of the heat exchanger corresponding to the dehumidifying section. The air guide surface 43a guides the airflow that has passed through the bypass air passage 43 toward the center of the windward surface of the heat exchanger. The air guide surface 43a in the present embodiment changes the direction of the airflow passing through the bypass air passage 43 to the lateral direction (azimuth direction). In the present embodiment, the provision of the air guide surface 43a allows the airflow passing through the bypass air passage 43 to flow into the heat exchanger corresponding to the dehumidifying section more efficiently. Therefore, dehumidification efficiency can be improved.

In the present embodiment, a wind guide surface 43a located on the left side of the grid portion 10c and a wind guide surface 43a located on the right side of the grid portion 10c are provided. The air guide surface 43a may be configured as a plane. By adjusting the normal direction of the plane of the air guide surface 43a, the direction in which the airflow is guided can be adjusted. Moreover, the wind guide surface 43a may be configured by a curved surface. By adjusting the curvature of the curved surface of the air guide surface 43a, it is possible to adjust the spread of the airflow guided by the air guide surface 43a.

The dehumidifier 1 has opening/closing means for adjusting the degree of opening of the second air passage. In this embodiment, as shown in FIG. 3, the flap 51 corresponds to the opening/closing means. The flap 51 corresponds to a shielding plate that can be opened and closed. The flap 51 can be opened and closed so that the opening of the suction port of the bypass air passage 43 is open, closed, or intermediate between open and closed. A suction port of the bypass air passage 43 is part of the suction port 11 . The suction port of the bypass air passage 43 is located outside the left and right outer edges of the windward end face of the HEPA filter 41 . The flap 51 is configured by a plate-like member. The flap 51 is arranged downstream of the suction port cover 11a. The flap 51 is, for example, rotatable around a rotating shaft provided at the end opposite to the HEPA filter 41 side, and is driven by an opening/closing means driving motor (not shown). The flap 51 located on the left side of the HEPA filter 41 rotates around a rotation shaft provided at the left end of the plate-shaped member that constitutes the flap. The flap 51 located on the right side of the HEPA filter 41 rotates around a rotation shaft provided at the right end of the plate-like member that constitutes the flap. The control means can adjust the degree of opening of the flap 51 by controlling the operation of the motor for driving the opening/closing means.

FIG. 3 shows the state when the flap 51 is in a position to close the suction port of the bypass air passage 43, that is, when the flap 51 is fully closed. When the flap 51 is fully closed, air is prevented from flowing into the suction port of the bypass air passage 43, so air is prevented from passing through the second air passage. When the opening/closing means driving motor rotates the flap 51 in the downstream direction, the bypass air passage 43 is opened and air can flow into the suction port of the bypass air passage 43 . Below, the value of the degree of opening of the flap 51 is referred to as opening degree [%]. The degree of opening when the flap 51 is fully closed is assumed to be 0%, and the degree of opening when the flap 51 is fully open is assumed to be 100%.

The dehumidifier 1 includes indoor humidity detection means for detecting the relative humidity of indoor air. Relative humidity may be referred to simply as "humidity" in this disclosure. As shown in FIG. 3, in this embodiment, the humidity sensor 61 corresponds to indoor humidity detection means. Humidity sensor 61 is arranged inside case 10 . An opening (not shown) communicating between the outside of the case 10 and the humidity sensor 61 is provided in a portion of the case 10 near the humidity sensor 61 . The control means can measure the indoor humidity by acquiring humidity detection information from the humidity sensor 61 . The humidity detection information acquired by the control means may be transmitted to the operation display board 15a, and the information about the measurement result by the humidity sensor 61 may be displayed on the operation display section 15. FIG.

The dehumidifier 1 also includes indoor air pollution level detection means for detecting the air pollution level, which is the pollution level of indoor air. The degree of air pollution corresponds to the amount or concentration of at least one of dust, odor, particles, droplets, and aerosols in indoor air. As shown in FIG. 2, in the present embodiment, the dust sensor 62 and the gas sensor 63 correspond to indoor air pollution level detection means. Not limited to this example, the dehumidifier 1 according to the present disclosure may include, for example, only one of the dust sensor 62 and the gas sensor 63 as indoor air pollution level detection means.

The dust sensor 62 is arranged inside the case 10 . An opening (not shown) communicating between the outside of the case 10 and the dust sensor 62 is provided in a portion of the case 10 near the dust sensor 62 . By obtaining dust detection information from the dust sensor 62, the control means can measure the amount and concentration of dust in the room. The dust sensor 62 has the ability to detect particles of 0.1 μm, for example. The dust detection information acquired by the control means may be transmitted to the operation display board 15a, and the information about the measurement result by the dust sensor 62 may be displayed on the operation display section 15. FIG.

The gas sensor 63 is arranged inside the case 10 . An opening (not shown) communicating between the outside of the case 10 and the gas sensor 63 is provided in a portion of the case 10 near the gas sensor 63 . By obtaining gas detection information from the gas sensor 63, the control means can measure the odor of the air in the room. The gas detection information acquired by the control means may be transmitted to the operation display board 15a, and the information about the measurement result of the gas sensor 63 may be displayed on the operation display section 15. FIG.

Next, operation of the dehumidifier 1 according to Embodiment 1 will be described. The dehumidifier 1 according to Embodiment 1 has an automatic dehumidifying and air cleaning operation in which the dehumidifying operation and the air cleaning operation are automatically performed simultaneously as a control mode. FIG. 4 is a flow chart showing processing during the dehumidifying air cleaning automatic operation according to the first embodiment.

The dehumidifying air cleaning automatic operation according to Embodiment 1 will be described below with reference to FIG. For example, when the user turns on the operation switch of the operation display unit 15 and selects the dehumidifying air cleaning automatic operation mode with the operation mode switching switch, the dehumidifier 1 starts the dehumidifying air cleaning automatic operation. When the dehumidified air cleaning automatic operation is started, the control means controls the louver driving motor so that the louver 13 opens the outlet 12 (step S001). Next, the control means controls the motor for driving the opening/closing means so that the flap 51 opens, and opens the suction port of the bypass air passage 43 (step S002). Subsequently, the control means rotates the motor 21a and controls the fan 21 to rotate at a preset number of revolutions (step S003). Here, the "rotational speed" in the present disclosure means the rotational speed per unit time. Therefore, the number of rotations of the fan 21 corresponds to the operating speed of the air blowing means. Further, the control means controls to drive the compressor drive motor, and the compressor starts compressing the refrigerant (step S004).

Next, the control means starts the operation of detecting the humidity of the air around the humidity sensor 61 with the humidity sensor 61, and determines whether the detected humidity is 50% or higher (step S005). Below, the value of the humidity detected by the humidity sensor 61 indicates a value rounded off to the nearest whole number. When the humidity detected by the humidity sensor 61 is less than 50%, the control means controls to stop driving the compressor drive motor, stops the compressor from compressing the refrigerant (step S006), and opens the flap 51. The motor for driving the opening/closing means is controlled so that the opening is closed to 0%, and the suction port of the bypass air passage 43 is closed (step S007). After that, after a certain period of time has passed, the process returns to step S005. In step S005, the humidity threshold for stopping the dehumidifying operation is set to 50%, but this is an example, and other values may be used as the humidity threshold.

If the humidity detected by the humidity sensor 61 is 50% or higher in step S005, the control means proceeds to step S008 and determines whether the humidity detected by the humidity sensor 61 is between 50% and 55%. When the humidity detected by the humidity sensor 61 is between 50% and 55%, the control means continues to drive the compressor drive motor, and the dust sensor 62 and the gas sensor 63 detect dust in the air around the respective sensors. , the gas detection operation is started, and the degree of air pollution is determined (step S018). As an example, the control means compares the particle concentration detected by the dust sensor 62 with a threshold value, and compares the gas concentration detected by the gas sensor 63 with the threshold value, thereby determining the degree of air pollution as "high", "medium" or "low". Judge in three steps. For example, when the particle concentration detected by the dust sensor 62 exceeds the high-concentration threshold or the gas concentration detected by the gas sensor 63 exceeds the high-concentration threshold, the control means determines that the degree of air pollution is "high". You may When the particle concentration detected by the dust sensor 62 is below the low concentration threshold and the gas concentration detected by the gas sensor 63 is below the low concentration threshold, the control means determines that the degree of air pollution is "low". good too. When the particle concentration detected by the dust sensor 62 is between the low-concentration threshold and the high-concentration threshold, or the gas concentration detected by the gas sensor 63 is between the low-concentration threshold and the high-concentration threshold, The degree of air pollution may be determined as "medium". However, in the present disclosure, the control means may determine the degree of air pollution in four stages or more, or may determine the degree of air pollution in two stages.

When the degree of air contamination is low in step S018, the control means controls the motor for driving the opening/closing means so as to close the flap 51, sets the opening degree of the flap 51 to 50% (step S019), and after a certain period of time, Return to step S005. On the other hand, if the degree of air pollution is not small, that is, if the degree of air pollution is high or medium, the control means controls the opening/closing means driving motor to close the flap 51, and the flap 51 is opened. The opening is set to 25% (step S020), and after a certain period of time, the process returns to step S005. Here, as an example of operation, the threshold for the humidity detected by the humidity sensor 61 is set to 50% to 55%, and the opening degree of the flap 51 is set to 25% and 50%. Any value other than

In step S008, if the humidity detected by the humidity sensor 61 is not between 50% and 55%, the control means proceeds to step S009 to check whether the humidity detected by the humidity sensor 61 is between 56% and 60%. judge. When the humidity detected by the humidity sensor 61 is between 56% and 60%, the control means continues driving the compressor drive motor, and the dust sensor 62 and the gas sensor 63 detect dust in the air around the respective sensors. , the gas detection operation is started, and the degree of air pollution is determined (step S013). When the degree of air pollution is high, the control means controls the motor for driving the opening/closing means so as to close the flap 51, sets the degree of opening of the flap 51 to 25% (step S014), and after a certain period of time proceeds to step S005. return. If the degree of air pollution is not high in step S013, the control means proceeds to step S015 and determines whether the degree of air pollution is medium. When the degree of air pollution is medium, the control means controls the motor for driving the opening/closing means so as to close the flap 51, sets the opening degree of the flap 51 to 50% (step S016), and after a certain period of time, step S005. back to If the degree of air pollution is not medium in step S015, that is, if the degree of air pollution is small, the control means controls the motor for driving the opening/closing means to close the flap 51, and the degree of opening of the flap 51 is set to 75%. (step S017), and after a certain period of time, the process returns to step S005. Here, as an example of the operation, the threshold for the humidity detected by the humidity sensor 61 is set to 56% to 60%, and the opening degree of the flap 51 is set to 25%, 50%, and 75%. Any other value may be used for the degree.

In step S009, if the humidity detected by the humidity sensor 61 is not between 56% and 60%, that is, if the humidity detected by the humidity sensor 61 is 61% or higher, the control means drives the compressor drive motor. , the dust sensor 62 and the gas sensor 63 start detecting dust and gas in the surrounding air of each sensor, and determine the degree of air pollution (step S010). When the degree of air pollution is not high, that is, when the degree of air pollution is medium or low, the control means controls the motor for driving the opening/closing means so as to close the flap 51, and the degree of opening of the flap 51 is set to 75%. (step S012), and after a certain period of time, the process returns to step S005. On the other hand, when the degree of air pollution is high, the control means controls the motor for driving the opening/closing means so as to close the flap 51, sets the opening degree of the flap 51 to 50% (step S011), and continues for a certain period of time. After that, the process returns to step S005. Here, as an example of the operation, the threshold for the humidity detected by the humidity sensor 61 is set to 61% or more, and the opening degree of the flap 51 is set to 50% and 75%, but the threshold value and the opening degree are other values. But it's okay.

Thus, according to the present embodiment, by providing a control means for changing the opening degree of the flap 51 according to the relative humidity and the degree of air pollution, when performing the dehumidifying operation and the air cleaning operation at the same time In addition, the ratio between the air volume passing through the first air passage and the air volume passing through the second air passage can be automatically adjusted. Therefore, the dehumidifying operation and the air cleaning operation can be performed automatically and more appropriately.

FIG. 5 is a graph showing the relationship between the degree of opening of the flap 51, the dehumidifying capacity, and the air cleaning capacity. In the graph of FIG. 5, the horizontal axis indicates the opening angle of the flap 51, and the vertical axis indicates the dehumidifying ability and the air cleaning ability. That is, FIG. 5 shows the ratio of the dehumidifying ability and the air cleaning ability at the opening degree of the flap 51. As shown in FIG. When the opening degree of the flap 51 located at the suction port of the second air passage increases, the air volume flowing to the first air passage decreases and the air volume flowing to the second air passage increases. In this case, the amount of air passing through the air purifying filter in the first air passage decreases, so the air cleaning ability decreases, and the amount of air flowing to the evaporator 31 in the second air passage increases, so the dehumidifying ability increases. . On the other hand, when the opening degree of the flap 51 decreases, the amount of air flowing through the first air passage increases and the amount of air flowing through the second air passage decreases. In this case, since the amount of air passing through the air cleaning filter in the first air passage increases, the air cleaning ability increases, and in the second air passage, the amount of air flowing to the evaporator 31 decreases, so the dehumidification ability decreases. . From the above, as shown in FIG. 5, when the opening degree of the flap 51 increases, the air cleaning ability decreases and the dehumidification ability increases. Conversely, when the opening degree of the flap 51 decreases, the air cleaning ability increases and the dehumidifying ability decreases. In FIG. 5, as an example, the capacity ratios are set to 50% and 100% when the opening degree of the flap 51 is 0% and 100%, but other values may be used.

In the present embodiment, when the relative humidity is the same, compared to the opening degree of the flap 51 at the first air pollution degree, when the second air pollution degree is higher than the first air pollution degree , the opening degree of the flap 51 is reduced. For example, when the humidity is 50% to 55%, when the air pollution degree is small (first air pollution degree), the opening degree of the flap 51 is set to 50% (step S019 in FIG. 4), and the air pollution degree is medium or When it is large (second air pollution degree), the opening degree of the flap 51 is set to 25% (step S020). Further, when the humidity is 61% or higher, when the air pollution degree is low or medium (first air pollution degree), the opening degree of the flap 51 is set to 70% (step S012), and when the air pollution degree is high (second air pollution degree). degree of contamination), the degree of opening of the flap 51 is set to 50% (step S020). In this way, by reducing the opening degree of the flap 51 at the second air pollution degree, which is higher than the first air pollution degree, the air volume of the first air passage passing through the air cleaning filter is reduced. Since the ratio is increased, the air purification capacity is increased, and indoor air can be purified more efficiently. On the other hand, when the air pollution degree is the first air pollution degree, which is a small air pollution degree, it is not necessary to increase the air cleaning ability so much, so by increasing the opening degree of the flap 51, the second air pollution filter that does not pass through the air cleaning filter Increase the air volume ratio of the air passage. This reduces the pressure loss, which is advantageous in achieving low power consumption and low noise.

Further, in the present embodiment, when the degree of air pollution is the same, the degree of opening of the flap 51 at the first relative humidity is higher than the opening degree of the flap 51 at the second relative humidity, which is higher than the first relative humidity. The opening degree of the flap 51 is increased. For example, when the degree of air pollution is high, the opening degree of the flap 51 is set to 25% when the first relative humidity (humidity is 56% to 60%) (step S014), and the second relative humidity (humidity is 61% above), the opening degree of the flap 51 is set to 50% (step S011). Further, when the degree of air pollution is small, the opening degree of the flap 51 is set to 50% when the first relative humidity (humidity is 50% to 55%) (step S019), and the second relative humidity (humidity is 56%). to 60%), the opening degree of the flap 51 is set to 75% (step S017). When the number of revolutions of the fan 21 is the same, the larger the degree of opening of the flap 51, the more the amount of air flowing to the evaporator 31 increases, so the dehumidification capacity increases. In the present embodiment, the dehumidifying ability is increased by increasing the opening degree of the flap 51 at the second relative humidity when the humidity is high. Therefore, it is possible to quickly lower the indoor humidity. On the other hand, when the first relative humidity is low, it is not necessary to increase the dehumidifying ability so much, so by reducing the opening degree of the flap 51, it is possible to increase the air cleaning ability.

As described above, according to the present embodiment, the control means automatically adjusts the opening degree of the flap 51 according to the relative humidity and the degree of air pollution. By changing the ratio of air volume flowing to the second air passage and changing the ratio of dehumidification capacity and air purification capacity, it is possible to realize an operation mode that satisfies the required values of dehumidification capacity and air purification capacity. becomes.

In the present disclosure, each function of the control means of the dehumidifier 1 may be achieved by a processing circuit. The processing circuitry of the control means may comprise at least one processor and at least one memory. When the processing circuit comprises at least one processor and at least one memory, each function of the control means may be achieved by software, firmware or a combination of software and firmware. At least one of software and firmware may be written as a program. Software and/or firmware may be stored in the at least one memory. At least one processor may accomplish each function of the control means by reading and executing a program stored in at least one memory. The at least one memory may include non-volatile or volatile semiconductor memory, magnetic disks, or the like.

The processing circuit of the control means may comprise at least one piece of dedicated hardware. If the processing circuit comprises at least one piece of dedicated hardware, the processing circuit may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field- Programmable Gate Array), or a combination thereof. The functions of each part of the control means may be accomplished respectively by processing circuitry. Also, the functions of each section of the control means may be collectively achieved by a processing circuit. For each function of the control means, a part may be achieved by dedicated hardware and another part may be achieved by software or firmware. The processing circuitry may accomplish each function of the control means by means of hardware, software, firmware, or a combination thereof.

Also, the control means of the dehumidifier 1 may be on a cloud server connected via a network.

Embodiment 2.
Next, the second embodiment will be described with reference to FIGS. 6 and 7. The description will focus on the differences from the above-described first embodiment, and the common description will be simplified or omitted. Moreover, the same code|symbol is attached|subjected to the element which is common with the element mentioned above, or corresponds.

The dehumidifier 1 according to Embodiment 2 has the same hardware configuration as that of Embodiment 1, and differs from Embodiment 1 in the blower fan rotational speed feedback control in the control method of the dehumidified air cleaning automatic operation.

FIG. 6 is a graph showing the relationship between the opening degree of the flap 51, the noise value, the dehumidifying ability, the air cleaning ability, and the number of revolutions of the fan 21. FIG. 7 is a flow chart showing processing during the dehumidifying air cleaning automatic operation according to the second embodiment. In addition, since the process from step S001 to step S020 of FIG. 7 is the same as that of Embodiment 1, description is omitted.

As shown in FIG. 6, when the rotation speed of the fan 21 is the same, the noise value SPL of the dehumidifier 1 increases as the opening degree of the flap 51 increases, and the noise value SPL of the dehumidifier 1 increases as the opening degree of the flap 51 decreases. The noise value SPL of is lowered. This is because the sound insulation rate of the flap 51 decreases as the opening degree of the flap 51 increases, and the sound insulation rate of the flap 51 increases as the opening degree of the flap 51 decreases. Further, if the opening degree of the flap 51 is the same, the higher the rotation speed of the fan 21, the higher the noise value SPL of the dehumidifier 1 and the higher the air cleaning ability and dehumidifying ability. Below, the rotation speed of the fan 21 may be called "fan rotation speed."

In the dehumidified air cleaning automatic operation in Embodiment 2, the rotational speed feedback control of the fan 21 is performed as follows. In the present embodiment, the fan rotation speed equal to or lower than the preset noise upper limit value is extracted from the relationship between the opening degree of the flap 51, the noise value, and the rotation speed of the fan 21. FIG. The control means sets the maximum fan rotation speed among the extracted fan rotation speeds, and changes the fan rotation speed in operation to the set rotation speed. In this embodiment, as an example of setting, the noise upper limit is set to 50 dB, and the fan rotation speeds are set to 700 rpm, 800 rpm, and 900 rpm, but other values may be used. Further, in the present embodiment, the fan rotation speed is switched in three steps, but the fan rotation speed may be switched in four steps or more, or the fan rotation speed may be switched in two steps. .

In the flowchart of FIG. 7, when the opening degree of the flap 51 is determined in steps S011, S012, S014, S016, S017, S019, or S020, the control means feeds back the rotational speed of the fan 21 in step S021. , the process returns to step S005. In step S021, the control means sets the fan rotation speed according to the degree of opening of the flap 51, as shown in the graph of FIG. That is, when the opening degree of the flap 51 is between 0% and α%, the control means sets the fan speed to 900 rpm. When the opening degree of the flap 51 is between α% and β%, the control means sets the fan speed to 800 rpm. When the opening degree of the flap 51 is between β% and 100%, the control means sets the fan speed to 700 rpm. where 0<α<50 and 50<β<100.

As described above, in the present embodiment, the control means controls the rotation speed of the fan when the opening degree of the flap 51 is smaller than the first opening degree. Increase the fan rotation speed at double opening. For example, the control means controls the fan rotation speed (700 rpm) when the opening degree of the flap 51 is from β% to 100% (first opening degree). Increase the fan rotation speed (800 rpm) when the second degree of opening is small (α% to β%). In addition, the control means controls the fan rotation speed (800 rpm) when the opening degree of the flap 51 is between α% and β% (first opening degree). Increase the fan rotation speed (900 rpm) at the second small opening (0% to α%). As a result, the fan rotation speed can be increased as long as the noise value of the dehumidifier 1 does not exceed the noise upper limit value, thereby improving the dehumidifying ability and the air cleaning ability.

In other words, in the present embodiment, the control means rotates the fan as the opening degree of the flap 51 increases so that the noise value SPL during operation of the dehumidifier 1 does not exceed the reference (noise upper limit value). Decrease the number step by step. This makes it possible to exhibit higher dehumidifying ability and air cleaning ability than in the first embodiment while suppressing noise.

Embodiment 3.
Next, the third embodiment will be described with reference to FIGS. omitted. Moreover, the same code|symbol is attached|subjected to the element which is common with the element mentioned above, or corresponds.

The dehumidifier 1 according to Embodiment 3 has the same hardware configuration as those of Embodiments 1 and 2, and the blower fan rotation speed feedback control in the control method of the dehumidified air cleaning automatic operation is the same as that of Embodiment 2. differ from

FIG. 8 is a flow chart showing the processing during the dehumidifying air cleaning automatic operation according to the third embodiment. In addition, since the process from step S001 to step S007 of FIG. 8 is the same as that of Embodiment 1, description is omitted. FIG. 9 is a graph showing the relationship between the opening degree of the flap 51, the set value of the fan rotation speed, the dehumidifying ability, and the air cleaning ability.

When the humidity detected by the humidity sensor 61 is 50% or higher in step S005 of FIG. 8, the control means proceeds to step S030 and determines whether the degree of air pollution is high. When the degree of air pollution is high, the control means changes the opening degree of the flap 51 to 0% (step S031), and changes the fan rotation speed to 1000 rpm by feedback of the rotation speed of the fan 21 (step S031). S035), and returns to step S005 after a certain period of time.

If the air pollution degree is not high in step S030, the control means proceeds to step S032 and determines whether the air pollution degree is medium. When the degree of air pollution is medium, the control means changes the opening degree of the flap 51 to 50% (step S033), and changes the fan speed to 750 rpm by feedback of the speed of the fan 21 (step S035). ), and after a certain period of time, the process returns to step S005.

If the degree of air pollution is not medium in step S032, that is, if the degree of air pollution is small, the control means changes the opening degree of the flap 51 to 100% (step S034), and the rotation speed feedback of the fan 21 , the fan speed is changed to 500 rpm (step S035), and after a certain period of time, the process returns to step S005.

In the present embodiment, as an example of setting, the flap 51 opening degree is set to 0%, 50%, and 100%, and the fan rotation speed is set to 1000 rpm, 750 rpm, and 500 rpm, but other values may be used. In addition, in the present embodiment, the opening degree of the flap 51 and the fan rotation speed are switched in three stages, but the opening opening degree of the flap 51 and the fan rotation speed may be switched in multiple stages such as four stages or more. Alternatively, the degree of opening of the flap 51 and the rotation speed of the fan may be switched in two steps.

As shown in FIG. 9, in the third embodiment, unlike the second embodiment, the control target of the rotation speed feedback of the fan 21 is set to 100% of the dehumidification capacity ratio. This reduces the number of control conditions and simplifies the control by not having a plurality of required dehumidification capacity values and limiting the dehumidification capacity ratio to 100%. In addition, since the dehumidification capacity is output at the target value regardless of the state of the opening degree of the flap 51, it leads to quality improvement in the market. Here, as an example of setting, the target value of the dehumidification capacity ratio is set to 100%, but other values may be used.

As described above, in Embodiment 3, the control means increases the fan rotation speed so that the dehumidification capacity becomes equal as the opening degree of the flap 51 decreases. As a result, high dehumidification performance can be obtained even when the opening degree of the flap 51 is small.

1 dehumidifier, 10 case, 10a front case, 10b rear case, 10c lattice part, 11 suction port, 11a suction port cover, 12 air outlet, 13 louver, 15 operation display unit, 15a operation display board, 16 board box (control Control board equivalent to means is housed inside), 20 wheel, 21 fan, 21a motor, 21b shaft, 31 evaporator, 32 condenser, 33 first space, 34 second space, 41 HEPA filter, 42 activated carbon Filter, 43 Bypass air passage, 43a Wind guide surface, 44 Filter air passage, 51 Flap, 61 Humidity sensor, 62 Dust sensor, 63 Gas sensor

Claims

a housing having an inlet and an outlet;
an air cleaning filter,
dehumidifying means having a dehumidifying section for removing moisture in the air;
a blower that generates an airflow from the suction port to the blowout port;
indoor humidity detection means for detecting the relative humidity of indoor air;
Indoor air pollution level detection means for detecting the air pollution level, which is the pollution level of indoor air;
a first air passage in which the air entering from the suction port passes through the air cleaning filter, the dehumidification unit, and the air blowing means and is blown out from the blowing port;
a second air passage in which the air entering from the suction port passes through the dehumidifying unit and the air blowing means without passing through the air cleaning filter and is blown out from the blowing port;
opening and closing means for adjusting the degree of opening of the second air passage;
a control means for changing the degree of opening of the opening/closing means according to the relative humidity and the degree of air pollution;
dehumidifier with
Having a wind guide surface provided in the second air passage,
The dehumidifier according to claim 1, wherein the air guide surface guides the airflow of the second air passage so that the airflow of the second air passage approaches the center of the windward side surface of the dehumidifying section.
The first air passage includes a filter air passage that passes through the air cleaning filter,
The second air passage includes a bypass air passage that is an air passage that does not pass through the air cleaning filter,
The dehumidifier according to claim 1 or 2, wherein the bypass air passage is adjacent to the filter air passage.
the bypass air passage adjacent to one side of the filter air passage;
the bypass air passage adjacent to the other side of the filter air passage;
A dehumidifier according to claim 3, comprising:
The dehumidification means is a heat pump type dehumidification means having a refrigerant circuit having a heat exchanger including an evaporator, a compressor, and a decompression device, or condenses moisture in the air removed by the adsorbent in the heat exchanger. 5. The dehumidifier according to any one of claims 1 to 4, which corresponds to desiccant dehumidifying means.
When the relative humidity is the same, the opening and closing at a second air pollution degree that is higher than the first air pollution degree compared to the opening degree of the opening and closing means at the first air pollution degree 6. The dehumidifier according to any one of claims 1 to 5, wherein the opening degree of the means is reduced.
When the degree of air pollution is the same, the opening of the opening and closing means when the second relative humidity is higher than the first relative humidity compared to the opening degree of the opening and closing means when the first relative humidity 7. The dehumidifier according to any one of claims 1 to 6, wherein the humidity is increased.
When the opening degree of the opening/closing means is the second opening degree, which is smaller than the first opening degree, compared with the operation speed of the blowing means when the opening degree of the opening/closing means is the first opening degree, The dehumidifier according to any one of claims 1 to 7, wherein the operating speed is increased.
The dehumidifier according to any one of claims 1 to 8, wherein the operating speed of the air blowing means is reduced stepwise as the opening degree of the opening/closing means increases.
The dehumidifier according to any one of claims 1 to 8, wherein the operation speed of the air blowing means is increased as the opening degree of the opening/closing means becomes smaller.