A dehumidifying device

Abstract

The application discloses a dehumidifying device, comprising: a shell; a heat exchanger, comprising a first heat exchanger and a second heat exchanger; a compressor connected with the two heat exchangers through a four-way valve, forming a refrigerant circulation loop; a reversing device, comprising a first reversing device and a second reversing device, the first reversing device having four connection ports, and the second reversing device having four connection ports; an outdoor temperature detection module for detecting outdoor temperature; an outdoor humidity detection module for detecting outdoor relative humidity; a control module configured to control the communication state between the four connection ports of each reversing device and / or control the operation of the refrigerant circulation system to dehumidify when the outdoor temperature and the outdoor relative humidity meet the starting condition. The dehumidifying device of the application can simultaneously realize the functions of dehumidifying and heating the air sent into the room by controlling the communication state between the four connection ports of each reversing device, thereby reducing the cold air feeling and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more particularly to a dehumidification device. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to the quality of their indoor environment and need to regulate the air. Air conditioning includes temperature and humidity control, and air quality and comfort are increasingly valued by every household and various commercial and office spaces.

[0003] In some regions, the phenomenon of "return to spring" occurs during the transition from winter to spring months. Outdoor temperatures range from 0 to 15°C, and relative humidity exceeds 80%. If traditional cooling and dehumidification methods are used, the temperature of the treated fresh air is very low, even below 10°C, resulting in a strong feeling of cold air. On the other hand, due to the low air temperature, a lower evaporation temperature is required to condense the moisture in the air. To solve this problem, reheating methods are usually used, such as electric heating or heating coils, which will cause energy waste due to the offsetting of heating and cooling. Summary of the Invention

[0004] To address the technical problem that existing dehumidification devices result in low indoor air temperature and a cold air feel, a dehumidification device is proposed that can solve the above problem.

[0005] To achieve the above objectives, the dehumidification device of the present invention adopts the following technical solution:

[0006] This invention provides a dehumidification device, comprising:

[0007] The outer shell has an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet, and an indoor air return outlet. The outer shell also has a first heat exchange chamber and a second heat exchange chamber.

[0008] The heat exchanger includes a first heat exchanger disposed in the first heat exchange chamber and a second heat exchanger disposed in the second heat exchange chamber;

[0009] The compressor is connected to two heat exchangers via four-way valves, forming a refrigerant circulation path.

[0010] The reversing device includes a first reversing device and a second reversing device. The first reversing device has four connection ports, which are respectively connected to the outdoor exhaust vent, the indoor supply vent, the first heat exchange chamber and the second heat exchange chamber. The second reversing device has four connection ports, which are respectively connected to the outdoor air inlet, the indoor return air vent, the first heat exchange chamber and the second heat exchange chamber.

[0011] Outdoor temperature detection module, which is used to detect outdoor temperature;

[0012] Outdoor humidity detection module, which is used to detect outdoor relative humidity;

[0013] The control module is configured to control the connection status between the four ports of each reversing device and / or control the operation of the refrigerant circulation system for dehumidification when the outdoor temperature and outdoor relative humidity meet the opening conditions.

[0014] In some embodiments of the present invention, the dehumidification device further includes:

[0015] Adsorption elements are provided in both the first heat exchange chamber and the second heat exchange chamber for adsorbing or releasing moisture.

[0016] An exhaust fan is installed at the outdoor exhaust outlet;

[0017] A blower is installed at the indoor air outlet;

[0018] When the control module controls the dehumidification process, it controls the four connection ports of the first reversing device to connect to each other, controls the second reversing device to connect the outdoor air inlet and the indoor air return outlet to the first heat exchange chamber and the second heat exchange chamber respectively, and controls the operation of the refrigerant circulation system.

[0019] The evaporator is located in the heat exchange chamber connected to the outdoor air inlet, and the heat exchanger in the heat exchange chamber connected to the indoor return air inlet is a condenser.

[0020] The dehumidification device also includes:

[0021] Two water receiving trays are respectively located below the first heat exchanger and the second heat exchanger;

[0022] The water receiving tray has a water level detection module. The controller acquires the water level of the water receiving tray corresponding to the evaporator, and controls the second reversing device to reverse the direction when the water level reaches a set value, and controls the refrigerant flow direction of the refrigerant circulation system to reverse the direction.

[0023] The dehumidification device also includes:

[0024] It also includes detecting whether the adsorbent corresponding to the evaporator is saturated, controlling the second reversing device to reverse when the adsorbent corresponding to the evaporator is saturated and the water level in the water receiving pan corresponding to the evaporator reaches a set value, and controlling the refrigerant flow direction of the refrigerant circulation system to reverse.

[0025] The dehumidification device also includes:

[0026] The air supply temperature detection module is used to detect the air supply temperature at the indoor air supply outlet;

[0027] After dehumidification is turned on, the method to determine whether the evaporator is located in the heat exchange chamber connected to the outdoor air inlet is as follows:

[0028] After the compressor is turned on, the supply air temperature is compared with the outdoor temperature. When the supply air temperature is lower than the outdoor temperature, it is determined that the evaporator is located in the heat exchange chamber connected to the outdoor air inlet. Otherwise, it is determined that the evaporator is not located in the heat exchange chamber connected to the outdoor air inlet, and the second reversing device is adjusted to reverse the direction, or the four-way valve is controlled to switch the conduction state.

[0029] The dehumidification device also includes:

[0030] An air valve is installed in the outdoor exhaust vent.

[0031] The air supply temperature detection module is used to detect the air supply temperature at the indoor air supply outlet.

[0032] The control module also includes determining the dehumidification mode and controlling the connection status between the four ports of each reversing device and / or controlling the operation of the refrigerant circulation system according to the dehumidification mode.

[0033] The dehumidification modes include:

[0034] No exhaust reheat dehumidification mode, in which the air valve is controlled not to open;

[0035] There is an exhaust reheat dehumidification mode, in which the air valve is controlled to open.

[0036] The dehumidification device also includes:

[0037] When the dehumidification mode is the no-exhaust reheat dehumidification mode, the control module further includes controlling the air supply fan to start and adjusting the air volume of the air supply fan according to the air supply temperature.

[0038] The dehumidification device also includes:

[0039] The control module also includes acquiring the set fresh air volume and determining the dehumidification mode based on the set fresh air volume;

[0040] When the set fresh air volume is low, the non-exhaust reheat dehumidification mode is executed;

[0041] When the fresh air volume is set to high, the exhaust reheat dehumidification mode is executed.

[0042] The dehumidification device also includes:

[0043] When the dehumidification mode is the exhaust reheat dehumidification mode, it also includes controlling the exhaust fan to turn on, and adjusting the air volume of the exhaust fan and the air volume of the supply fan according to the supply air temperature.

[0044] The dehumidification device also includes:

[0045] When the dehumidification mode is the exhaust reheat dehumidification mode, the method for adjusting the air volume Qea of ​​the exhaust fan and the air volume Qsa of the supply fan is as follows:

[0046] Qsa = Qoa + β * Qra;

[0047] Qea = (1-β) * Qra;

[0048] Qra is the return air volume, and β is the adjustment coefficient. When the supply air temperature is lower than the set temperature, β is increased.

[0049] The technical solution of the present invention has the following technical effects compared with the prior art:

[0050] The dehumidification device of the present invention is equipped with two reversing devices. By controlling the connection state between the four connection ports of each reversing device, it can simultaneously achieve the functions of dehumidifying and heating the air supplied into the room, reducing the feeling of cold air and improving the user experience. Attached Figure Description

[0051] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the structure of one embodiment of the dehumidification device proposed in this invention;

[0053] Figure 2 This is a schematic diagram of the refrigerant circulation system piping connection in one embodiment of the dehumidification device proposed in this invention;

[0054] Figure 3 This is a schematic diagram of the structure of the second reversing device in one embodiment of the dehumidification device proposed in this invention;

[0055] Figure 4 yes Figure 3 A schematic diagram of the rear structure;

[0056] Figure 5 This is another schematic diagram of the second reversing device of the dehumidification device proposed in this invention;

[0057] Figure 6 yes Figure 5 Schematic diagrams of the internal structure in two different states;

[0058] Figure 7 yes Figure 5A schematic diagram of the internal structure of [the object] in another state;

[0059] Figure 8 This is the control logic diagram of the dehumidification device proposed in this invention during the airless reheat dehumidification mode.

[0060] Figure 9 This is a schematic diagram of the air duct path in state 1 of the dehumidification device proposed in this invention during the reheat dehumidification mode without exhaust air.

[0061] Figure 10 This is a schematic diagram of the air duct path in state 2 of the dehumidification device proposed in this invention during the reheat dehumidification mode without exhaust air.

[0062] Figure 11 This is the control logic diagram of the dehumidification device proposed in this invention during the reheat dehumidification mode with exhaust air.

[0063] Figure 12 This is a schematic diagram of the air duct path in state 1 of the dehumidification device with exhaust air in the reheat dehumidification mode proposed in this invention.

[0064] Figure 13 This is a schematic diagram of the air duct path in state 2 of the dehumidification device with exhaust air in the reheat dehumidification mode proposed in this invention. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0068] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0069] Example 1

[0070] This embodiment proposes a dehumidification device, such as... Figure 1 As shown, it includes an outer shell 10, on which an outdoor air inlet OA, an outdoor air outlet EA, an indoor air supply outlet SA, and an indoor return air outlet RA are formed. A first heat exchange chamber 11 and a second heat exchange chamber 12 are formed inside the outer shell 10.

[0071] The air dehumidification device also includes at least two heat exchangers, including a first heat exchanger 13 disposed in a first heat exchange chamber 11 and a second heat exchanger 14 disposed in a second heat exchange chamber 12.

[0072] like Figure 2 As shown, the heat exchanger is connected in sequence through a refrigerant pipe compressor 40, a four-way valve 50, and an electronic expansion valve 60 to form a closed refrigerant circulation path, thereby realizing the delivery of refrigerant.

[0073] The air dehumidification device in this embodiment also has two reversing devices, namely a first reversing device 20 and a second reversing device 30. The first reversing device 20 has four connection ports, which are respectively connected to the outdoor exhaust vent EA, the indoor air supply vent SA, the first heat exchange chamber 11, and the second heat exchange chamber 12. The connection state between the four connection ports of the first reversing device 20 can be controlled and adjusted as needed.

[0074] The second reversing device 30 also has four connection ports, which are respectively connected to the outdoor air inlet OA, the indoor return air inlet RA, the first heat exchange chamber 11, and the second heat exchange chamber 12. The connection status between the four connection ports of the second reversing device 30 can be controlled and adjusted as needed.

[0075] The first heat exchange chamber 11 and the second heat exchange chamber 12 can be connected to two air outlets respectively.

[0076] This dehumidifier also includes an outdoor temperature detection module and an outdoor humidity detection module (not shown in the figure). The outdoor temperature detection module is used to detect the outdoor temperature and send it to the control module. The outdoor humidity detection module is used to detect the outdoor relative humidity.

[0077] The control module of the dehumidifier is configured to control the connection status between the four connection ports of each reversing device and / or control the operation of the refrigerant circulation system to perform dehumidification when the outdoor temperature and outdoor relative humidity meet the opening conditions.

[0078] In some embodiments of the present invention, the conditions for entering the dehumidification process are determined as follows:

[0079] ① When the outdoor temperature is ≤ T1, and the relative humidity is higher than T1, the perceived temperature is lower. The value of T1 ranges from 10℃ to 18℃.

[0080] ② The outdoor relative humidity is ≥ M1, and the value of M1 is in the range of 50%-80%.

[0081] If both of the above conditions are met, the system will enter the winter reheat dehumidification mode.

[0082] The dehumidifier in this embodiment is equipped with two reversing devices. By controlling the connection status between the four connection ports of each reversing device, it can simultaneously dehumidify and heat the air supplied into the room, reducing the feeling of cold air and improving the user experience.

[0083] In some embodiments of the present invention, the dehumidification device further includes an adsorption element. Both the first heat exchange chamber 11 and the second heat exchange chamber 12 are provided with adsorption elements, which are used to absorb moisture when the heat exchanger in the corresponding heat exchange chamber is an evaporator, thereby achieving the effect of dehumidification.

[0084] An exhaust fan 70 is installed at the outdoor exhaust vent EA, which is used to draw the airflow outside the indoor return air vent RA into the heat exchange chamber connected to it.

[0085] A blower 80 is installed at the indoor air outlet SA, which is used to drive the airflow in the airflow channel connected to the indoor air outlet SA to be discharged from the indoor air outlet SA.

[0086] In some embodiments of the present invention, the indoor air supply outlet SA and the indoor return air outlet RA are respectively connected to the indoor environment, and the outdoor air inlet OA and the outdoor air outlet EA are respectively connected to the outdoors.

[0087] The refrigerant circulation system can switch between the cooling and heating functions of the two heat exchange chambers by changing the direction of refrigerant flow. At the same time, it works with the first reversing device 20 and the second reversing device 30 to control the connection status between their respective connection ports, so as to ensure that the air delivered into the room through the indoor air outlet SA meets the dehumidification requirements.

[0088] The control module can control the four-way valve to switch the first heat exchanger 13 as an evaporator and the second heat exchanger 14 as a condenser, or the first heat exchanger 13 as a condenser and the second heat exchanger 14 as an evaporator.

[0089] The control module can also switch between different airflow channels by controlling the connection status of the four connection ports of the first reversing device 20 and the second reversing device 30.

[0090] When the control module controls the dehumidification process, it controls the four connection ports of the first reversing device to connect to each other, and controls the second reversing device to connect the outdoor air inlet OA and the indoor return air inlet RA to the first heat exchange chamber 11 and the second heat exchange chamber 12 respectively, and controls the operation of the refrigerant circulation system to ensure that the evaporator is located in the heat exchange chamber connected to the outdoor air inlet, and at the same time, the condenser is located in the heat exchange chamber connected to the indoor return air inlet.

[0091] The dehumidification principle of this dehumidification device is as follows: outdoor fresh air enters the heat exchange chamber where the evaporator is located through the outdoor air inlet OA. When the fresh air passes through the evaporator, the moisture in the fresh air is heated by the refrigerant in the evaporator and condenses into water, which is absorbed by the adsorption element in the heat exchange chamber, thereby removing the moisture in the fresh air. The fresh air is then sent into the room through the indoor air outlet SA.

[0092] At this time, the indoor return air enters the heat exchange chamber where the condenser is located through the indoor return air inlet RA. When the return air passes through the condenser, the condenser heats the adsorption element that is close to it. Part or all of the hot air mixes with the fresh air after dehumidification in the first reversing device, the supply air temperature is increased, and it is sent to the room through the indoor supply air inlet SA.

[0093] The dehumidification device also includes two water receiving trays (not shown in the figure), which are respectively located below the first heat exchanger 13 and the second heat exchanger 14.

[0094] The adsorbent has a limited capacity to adsorb moisture. When the adsorption capacity of the adsorbent adjacent to the evaporator decreases in this mode, that is, when its dehumidification capacity decreases, the heat exchange chamber connected to the outdoor exhaust vent EA can be exchanged by controlling the reversing device. This will allow the adsorbents through which the fresh air and return air pass to be exchanged, and at the same time, the refrigerant will be reversed. After the above adjustment, the dehumidification device will still operate in the dehumidification mode, so that the dehumidification device will continue to maintain a high-efficiency dehumidification capacity.

[0095] The water tray has a water level detection module, which controls and obtains the water level of the water tray corresponding to the evaporator, and controls the second reversing device to reverse the direction when the water level reaches the set value, as well as controls the refrigerant flow direction of the refrigerant circulation system to reverse the direction.

[0096] Since the adsorbent itself has a certain capacity to adsorb moisture, to avoid frequent reversing, the dehumidification device also includes a function to detect whether the adsorbent corresponding to the evaporator is saturated. When the adsorbent corresponding to the evaporator is saturated and the water level in the evaporator's drip tray reaches a set value, the device controls a second reversing device to reverse the flow, and also controls the refrigerant flow direction of the refrigerant circulation system to reverse. In other words, when both the adsorbent saturation and the water level in the evaporator's drip tray reach the set value, it indicates that the water absorption and storage capacity in the heat exchange chamber where the evaporator is located has reached its upper limit, and then the reversing is controlled.

[0097] In some embodiments of the present invention, the dehumidification device further includes an air supply temperature detection module, which is used to detect the air supply temperature at the indoor air supply outlet.

[0098] After turning on the dehumidifier, the method to determine whether the evaporator is located in the heat exchange chamber connected to the outdoor air inlet is as follows:

[0099] After the compressor is turned on, the supply air temperature is compared with the outdoor temperature. If the supply air temperature is lower than the outdoor temperature, it is determined that the evaporator is located in the heat exchange chamber connected to the outdoor air inlet. Otherwise, it is determined that the evaporator is not located in the heat exchange chamber connected to the outdoor air inlet, and the second reversing device is adjusted to reverse the direction, or the four-way valve is controlled to switch the conduction state.

[0100] In some embodiments of the present invention, the dehumidification device further includes an air valve 90 and a supply air temperature detection module (not shown in the figure). The air valve 90 is disposed in the outdoor exhaust vent EA, and the supply air temperature detection module is used to detect the supply air temperature of the indoor supply air vent SA.

[0101] The control module also includes determining the dehumidification mode and controlling the connection status between the four ports of each reversing device and / or controlling the operation of the refrigerant circulation system according to the dehumidification mode.

[0102] Dehumidification modes include:

[0103] In the no-exhaust reheat dehumidification mode, the control damper 90 is not opened.

[0104] There is an exhaust reheat dehumidification mode, in which the control damper 90 is opened.

[0105] In the no-exhaust reheat dehumidification mode, the control damper 90 is not open. The dehumidification principle of the dehumidification device is as follows: outdoor fresh air enters the heat exchange chamber where the evaporator is located through the outdoor air inlet OA. When the fresh air passes through the evaporator, the moisture in the fresh air is heated by the refrigerant in the evaporator and condenses into water, which is absorbed by the adsorption element in the heat exchange chamber, thereby removing the moisture in the fresh air. The water is then sent into the room through the indoor air outlet SA.

[0106] At this time, the indoor return air enters the heat exchange chamber where the condenser is located through the indoor return air inlet RA. When the return air passes through the condenser, the condenser heats the adsorption element that is close to it. All the hot air is mixed with the fresh air after dehumidification in the first reversing device and sent to the room through the indoor air outlet SA.

[0107] When there is an exhaust reheat dehumidification mode, the control air valve 90 is opened, and part of the hot air is mixed with the fresh air after outdoor dehumidification in the first reversing device and sent to the room through the indoor air supply outlet SA.

[0108] When the dehumidification mode is the no-exhaust reheat dehumidification mode, the control module also includes controlling the air supply fan to start and adjusting the air volume of the air supply fan according to the air supply temperature.

[0109] The method for adjusting the airflow of the exhaust fan in exhaust reheat dehumidification mode is as follows:

[0110] Start the exhaust fan;

[0111] The exhaust fan operates at 50-100% of its rated low air volume, and the air volume of the exhaust fan is adjusted according to the supply air temperature.

[0112] If the supply air temperature is low, the exhaust fan operates at a higher percentage of airflow; if the supply air temperature meets the requirements (e.g., ≥18℃), the exhaust fan operates at a lower percentage of airflow.

[0113] In some embodiments of the present invention, the control module further includes acquiring a set fresh air volume and determining a dehumidification mode based on the set fresh air volume.

[0114] When the set fresh air volume is low, the intake of fresh air is relatively small, so the reheat dehumidification mode without exhaust is activated. No exhaust saves energy.

[0115] When the set fresh air volume is high, the system operates in exhaust reheat dehumidification mode due to the large volume of fresh air introduced. At this time, opening the damper 90 serves two purposes: firstly, to prevent excessive positive pressure in the room, and secondly, to increase the airflow to the condenser side, thereby enhancing the system's dehumidification capacity.

[0116] In some embodiments of the present invention, when the dehumidification mode is an exhaust reheat dehumidification mode, the method further includes controlling the exhaust fan to turn on and adjusting the air volume of the exhaust fan and the air volume of the supply fan according to the supply air temperature.

[0117] In some embodiments of the present invention, when the dehumidification mode is an exhaust reheat dehumidification mode, the method for adjusting the air volume Qea of ​​the exhaust fan and the air volume Qsa of the supply fan is as follows:

[0118] Qsa = Qoa + β * Qra;

[0119] Qea = (1-β) * Qra;

[0120] Qra is the return air volume, and β is the adjustment coefficient. When the supply air temperature is lower than the set temperature, β is increased.

[0121] Example 2

[0122] There are various ways to implement a commutation device. In this embodiment, the first commutation device 20 is used as an example for explanation.

[0123] like Figure 3 , Figure 4 As shown, the four connection ports of the first reversing device 20 are the first connection port 201, the second connection port 202, the third connection port 203, and the fourth connection port 204, which are respectively connected to the valve chamber of the first reversing device 20. The four connection ports are respectively connected to the outdoor exhaust vent EA, the indoor air supply vent SA, the first heat exchange chamber 11, and the second heat exchange chamber 12.

[0124] The partition can be implemented using a valve plate 205. The drive device 206 is controlled by the control module and is used to drive the valve plate 205 to rotate.

[0125] When the valve plate 205 is rotated to different positions, the four connection ports can be connected accordingly.

[0126] The second reversing device 30 has four connection ports: a first connection port 301, a second connection port 302, a third connection port 303, and a fourth connection port 304. These four connection ports are respectively connected to the valve chamber of the second reversing device 30. These four connection ports are respectively connected to the outdoor air inlet OA, the indoor return air inlet RA, the first heat exchange chamber 11, and the second heat exchange chamber 12.

[0127] This embodiment provides a specific connection method, but is not limited to the connection method described in this embodiment.

[0128] The first connection port 201 of the first reversing device is connected to the indoor air supply port SA, the fourth connection port 204 of the first reversing device is connected to the outdoor air exhaust port EA, the second connection port 202 of the first reversing device is connected to the second heat exchange chamber 12, and the third connection port 203 of the first reversing device is connected to the first heat exchange chamber 11.

[0129] like Figure 5As shown, the first reversing device 20 includes two side panels 207 and 208 arranged opposite to each other and a front panel 209. Two connection ports are opened on the two opposite side panels 207 and 208, namely the first connection port 201 and the fourth connection port 204. The other two connection ports are opened on the front panel 209, namely the second connection port 202 and the third connection port 203. The rotation axis of the valve plate 205 is located between the second connection port 202 and the third connection port 203, which can connect the first connection port 201 with the second connection port 202 and the third connection port 203 with the fourth connection port 204, or connect the first connection port 201 with the third connection port 203 and the second connection port 202 with the fourth connection port 204.

[0130] In some embodiments, the two oppositely arranged side panels 207 and 208 are curved surfaces, and the axis of the curved surfaces is perpendicular to the front panel 209. The third connection port 203 is located above the second connection port 202. Of course, the third connection port 203 may also be located below the second connection port 202.

[0131] The rotation axis of valve plate 205 is located at the center of valve plate 205 and is coaxially arranged with the two arc surfaces. For example... Figure 6 As shown, the valve plate 205 rotates along the arc surface. When it rotates to position I, the first connection port 201 connects to the third connection port 203, and the second connection port 202 connects to the fourth connection port 204. When the valve plate 205 rotates to position II, the first connection port 201 connects to the second connection port 202, and the third connection port 203 connects to the fourth connection port 204. Figure 7 As shown, when the valve plate 205 rotates to the horizontal position, the first connection port 201, the third connection port 203, the second connection port 202 and the fourth connection port 204 are interconnected.

[0132] The first connection port 301 of the second reversing device 30 is connected to the indoor return air vent RA, the fourth connection port 304 of the second reversing device is connected to the outdoor air inlet OA, the second connection port 302 of the second reversing device is connected to the second heat exchange chamber 12, and the third connection port 303 of the second reversing device is connected to the first heat exchange chamber 11.

[0133] The second commutator 30 has a similar structure to the first commutator 20, and will not be described in detail here.

[0134] Example 3

[0135] The second connection port 302 of the second reversing device 30 can be connected to either the first heat exchange chamber 11 or the second heat exchange chamber 12, and the third connection port 303 of the second reversing device 30 can be connected to the other one of the first heat exchange chamber 11 and the second heat exchange chamber 12.

[0136] In this embodiment, the second connection port 302 is connected to the second heat exchange chamber 12, and the third connection port 303 is connected to the first heat exchange chamber 11 as an example for illustration.

[0137] In one embodiment of the exhaust-free reheat dehumidification mode of the present invention, such as... Figure 8 As shown, it includes:

[0138] Step 1: Close EA damper 90.

[0139] Step 2: Adjust the valve plate of the first reversing device 20 to a horizontal position, and the second reversing device 30 will reverse normally, such as... Figure 9 As shown, the fourth connection port 304 of the second reversing device is connected to the third connection port 303, and the first connection port 301 of the second reversing device is connected to the second connection port 302. At this time, the outdoor air inlet OA is connected to the fourth connection port 304 of the second reversing device, and the indoor return air inlet RA is connected to the first connection port 301 of the second reversing device.

[0140] At this time, the first heat exchange chamber 11 and the second heat exchange chamber 12 at the first reversing device 20 are connected.

[0141] Step 3: Determine if the evaporator is in the heat exchange chamber connected to the outdoor air inlet OA. First, start the blower 80 and compressor 40. The blower 80 should run at its rated low airflow. If the supply air temperature is lower than the outdoor temperature, it indicates that the evaporator is in the heat exchange chamber connected to the outdoor air inlet OA. Otherwise, the evaporator is not in the heat exchange chamber connected to the outdoor air inlet OA, and adjustment is required by reversing the four-way valve; alternatively, adjustment can be made by rotating the valve plate using the second reversing device 30. Figure 9 The image shows the air duct path in state 1 of the no-exhaust reheat dehumidification mode.

[0142] At this point, the airflow path is as follows:

[0143] Outdoor fresh air: Outdoor air inlet OA → fourth connection port 304 of the second reversing device → third connection port 303 of the second reversing device → first heat exchange chamber 11 (the heat exchanger inside is an evaporator) → first reversing device 20 → first connection port 201 of the first reversing device 20 → indoor air outlet SA, the fresh air is cooled and dehumidified.

[0144] Indoor return air: Indoor return air vent RA → First connection port 301 of the second reversing device → Second connection port 302 of the second reversing device → Second heat exchange chamber 12 (the heat exchanger inside is a condenser) → First reversing device 20 → First connection port 201 of the first reversing device 20 → Indoor air supply vent SA, the return air is heated.

[0145] After the fresh air and indoor return air are mixed in the first reversing device 20, the supply air temperature is increased.

[0146] Step 4: Start the exhaust fan 70.

[0147] The exhaust fan 70 operates at 50-100% of its rated low-speed air volume, and the air volume of the exhaust fan 70 is adjusted according to the supply air temperature.

[0148] Step 5: Determine if the adsorption element near the evaporator is saturated. If saturated, the condensate generated during operation flows into the water collection pan. Determine if the water level in the water collection pan corresponding to the evaporator reaches the set value. When the water level in the water collection pan corresponding to the evaporator reaches the set value, the control module receives a signal indicating that a reversal is required.

[0149] The position detection module can be implemented using, but is not limited to, a float switch.

[0150] Step 6: The four-way valve 50 reverses, and the second reversing device 30 also reverses. After the reversal, the second heat exchanger 14 acts as an evaporator, and the first heat exchanger 13 acts as a condenser. Figure 10 As shown. The fourth connection port 304 of the second commutator is connected to the second connection port 302, and the first connection port 301 of the second commutator is connected to the third connection port 303.

[0151] like Figure 10 The diagram shows the air duct path in state 2 of the no-exhaust reheat dehumidification mode:

[0152] Outdoor fresh air: Outdoor air inlet OA → fourth connection port 304 of the second reversing device → second connection port 302 of the second reversing device → second heat exchange chamber 12 (the heat exchanger inside is an evaporator) → first reversing device 20 → first connection port 201 of the first reversing device 20 → indoor air outlet SA, the fresh air is cooled and dehumidified.

[0153] Indoor return air: Indoor return air vent RA → First connection port 301 of the second reversing device → Third connection port 303 of the second reversing device → First heat exchange chamber 11 (the heat exchanger inside is a condenser) → First reversing device 20 → First connection port 201 of the first reversing device 20 → Indoor air supply vent SA, the return air is heated.

[0154] After the fresh air and indoor return air are mixed in the first reversing device, the supply air temperature is increased.

[0155] Delayed drainage: In the previous cycle, when the first heat exchanger was an evaporator, the condensate remained in the drip tray. In this cycle, the first heat exchanger acts as a condenser, and after the exhaust fan is started, the first heat exchange chamber 11 is under positive pressure. At this time, the water in the drip tray can be drained smoothly. (No drain pump is required, thus achieving delayed drainage).

[0156] Example 4

[0157] In this embodiment, the second connection port 302 is connected to the second heat exchange chamber 12, and the third connection port 303 is connected to the first heat exchange chamber 11 as an example for illustration.

[0158] In one embodiment of the exhaust reheat dehumidification mode of the present invention, when the fresh air volume is set to high, the exhaust reheat dehumidification mode is entered. At this time, due to the large amount of fresh air introduced, by opening the air valve 90, on the one hand, the positive pressure in the room is too large, and on the other hand, the air volume on the condenser side is increased, thereby improving the dehumidification capacity of the system.

[0159] like Figure 11 As shown, it includes:

[0160] Step 1: Open the air valve 90.

[0161] Step 2: Adjust the damper blades of the first reversing device 20 to a horizontal position, such as... Figure 12 As shown, the second reversing device 30 reverses normally, at which time the first heat exchange chamber 11 and the second heat exchange chamber 12 at the first reversing device 20 are connected. The fourth connection port 304 of the second reversing device is connected to the third connection port 303, and the first connection port 301 of the second reversing device is connected to the second connection port 302. At this time, the outdoor air inlet OA is connected to the fourth connection port 304 of the second reversing device, and the indoor return air inlet RA is connected to the first connection port 301 of the second reversing device.

[0162] Step 3: Determine if the evaporator is in the fresh air duct. First, start the blower 80 and compressor 40. The blower 80 should run at 1.25 to 1.5 times the rated high air volume. When the supply air temperature is lower than the outdoor temperature, it means that the evaporator is in the heat exchange chamber connected to the outdoor air inlet OA. Otherwise, the four-way valve needs to be reversed for adjustment; or the valve plate can be rotated through the second reversing device 30 for adjustment.

[0163] by Figure 12 The image shown is a schematic diagram of the air duct path in State 1 of the exhaust reheat dehumidification mode. The air duct path at this time is as follows:

[0164] Outdoor fresh air: Outdoor air inlet OA → fourth connection port 304 of the second reversing device → third connection port 303 of the second reversing device → first heat exchange chamber 11 (the heat exchanger inside is an evaporator) → first reversing device 20 → first connection port 201 of the first reversing device 20 → indoor air outlet SA, the fresh air is cooled and dehumidified.

[0165] Indoor return air: Indoor return air vent RA → First connection port 301 of the second reversing device → Second connection port 302 of the second reversing device → Second heat exchange chamber 12 (the heat exchanger inside is a condenser) → First reversing device 20 → ①②.

[0166] ① Part of it enters the first connection port 201 → indoor air supply port SA.

[0167] ②The other part enters the fourth connection port 204 → outdoor air outlet EA and is discharged outdoors.

[0168] After the fresh air and part of the indoor return air are mixed in the first reversing device 20, the supply air temperature is increased.

[0169] Step 4: At this time, the exhaust fan 70 is running at its rated high air volume. The method for adjusting the air volume Qea of ​​the exhaust fan and the air volume Qsa of the supply fan is as follows:

[0170] Qsa = Qoa + β * Qra;

[0171] Qea = (1-β) * Qra;

[0172] Qra is the return air volume, and β is the adjustment coefficient. When the supply air temperature is lower than the set temperature, β is increased.

[0173] Step 5: Determine if the adsorption element near the evaporator is saturated. If saturated, the condensate generated during operation flows into the water collection pan. Determine if the water level in the water collection pan corresponding to the evaporator reaches the set value. When the water level in the water collection pan corresponding to the evaporator reaches the set value, the control module receives a signal indicating that a reversal is required.

[0174] The water level detection module can be implemented using, but is not limited to, a float switch.

[0175] Step 6: The four-way valve 50 reverses, and the second reversing device 30 also reverses. After the reversal, the second heat exchanger 14 acts as a condenser, and the first heat exchanger 13 acts as an evaporator. Figure 13 The diagram shown is a schematic of the air duct path in State 2 of the exhaust reheat dehumidification mode.

[0176] At this point, the airflow path is as follows:

[0177] Outdoor fresh air: Outdoor air inlet OA → fourth connection port 304 of the second reversing device → second connection port 302 of the second reversing device → second heat exchange chamber 12 (the heat exchanger inside is an evaporator) → first reversing device 20 → first connection port 201 of the first reversing device 20 → indoor air outlet SA, the fresh air is cooled and dehumidified.

[0178] Indoor return air: Indoor return air vent RA → First connection port 301 of the second reversing device → Third connection port 303 of the second reversing device → First heat exchange chamber 11 (the heat exchanger inside is a condenser) → First reversing device 20 → ①②.

[0179] ① Part of it enters the first connection port 201 → indoor air supply port SA.

[0180] ②The other part enters the fourth connection port 204 → outdoor air outlet EA and is discharged outdoors.

[0181] When the signal from the water level detection module is received again, the control switches to the opposite direction, and this cycle repeats to achieve the dehumidification effect.

[0182] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dehumidifying apparatus characterized by comprising: The application relates to a dehumidification device. The device comprises: an outer shell, which is provided with an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet and an indoor air return outlet, and which is internally provided with a first heat exchange cavity and a second heat exchange cavity; a heat exchanger, which comprises a first heat exchanger arranged in the first heat exchange cavity and a second heat exchanger arranged in the second heat exchange cavity; a compressor, which is connected with the two heat exchangers through a four-way valve to form a refrigerant circulation loop; a reversing device, which comprises a first reversing device and a second reversing device, the first reversing device has four connection ports, which are respectively connected with the outdoor air outlet, the indoor air supply outlet, the first heat exchange cavity and the second heat exchange cavity, and the second reversing device has four connection ports, which are respectively connected with the outdoor air inlet, the indoor air return outlet, the first heat exchange cavity and the second heat exchange cavity; an outdoor temperature detection module, which is used for detecting the outdoor temperature; an outdoor humidity detection module, which is used for detecting the outdoor relative humidity; a control module, which is configured to control the communication state among the four connection ports of each reversing device and control the operation of the refrigerant circulation system to carry out dehumidification when the outdoor temperature and the outdoor relative humidity satisfy an opening condition. The dehumidification device further comprises: an air valve arranged in the outdoor air outlet; an air supply temperature detection module, which is used for detecting the air supply temperature of the indoor air supply outlet; the control module further comprises determining a dehumidification mode and controlling the communication state among the four ports of each reversing device and the operation of the refrigerant circulation system according to the dehumidification mode; the dehumidification mode comprises: a no-outdoor-air-reheat dehumidification mode, in which the air valve is not opened; a with-outdoor-air-reheat dehumidification mode, in which the air valve is opened; when the dehumidification mode is the with-outdoor-air-reheat dehumidification mode, the method for adjusting the air volume Qea of the air return fan and the air volume Qsa of the air supply fan is: Qsa= Qoa +beta* Qra; Qea=(1-beta)* Qra; 2. The dehumidification apparatus according to claim 1, wherein, Qra is the air return volume, Qoa is the air inlet volume, and beta is an adjustment coefficient, which is increased when the air supply temperature is lower than a set temperature. The dehumidification device further comprises: a moisture absorbing accessory, which is arranged in the first heat exchange cavity and the second heat exchange cavity and is used for absorbing or releasing moisture; an air return fan arranged at the outdoor air outlet; an air supply fan arranged at the indoor air supply outlet; when the control module controls dehumidification, the four connection ports of the first reversing device are controlled to be in communication with each other, the second reversing device is controlled to connect the outdoor air inlet and the indoor air return outlet with the first heat exchange cavity and the second heat exchange cavity one by one, and the refrigerant circulation system is controlled to operate.

3. The dehumidification apparatus of claim 2, wherein, The evaporator is located in the heat exchange cavity connected with the outdoor air inlet. The dehumidification device further comprises: two water collecting trays arranged below the first heat exchanger and the second heat exchanger respectively; the water collecting tray is provided with a water level detection module, which controls the water level of the water collecting tray corresponding to the evaporator, and controls the second reversing device to reverse and controls the refrigerant flow direction of the refrigerant circulation system when the water level reaches a set value.

4. The dehumidification apparatus according to claim 3, wherein, The dehumidification device further comprises a detection of whether the suction attachment corresponding to the evaporator is saturated, control of the second reversing device to reverse when the suction attachment corresponding to the evaporator is saturated and the water level of the water pan corresponding to the evaporator reaches a set value, and control of the refrigerant circulation system to reverse the flow direction of the refrigerant.

5. The dehumidification apparatus of claim 2, wherein, The dehumidification device further comprises: an outdoor temperature detection module for detecting the outdoor temperature; After starting the dehumidification, the method for determining whether the evaporator is located in the heat exchange cavity connected to the outdoor air inlet comprises: After starting the compressor, the supply air temperature is compared with the outdoor temperature, and when the supply air temperature is lower than the outdoor temperature, it is determined that the evaporator is located in the heat exchange cavity connected to the outdoor air inlet, otherwise, it is determined that the evaporator is not located in the heat exchange cavity connected to the outdoor air inlet, and the second reversing device is adjusted to reverse, or the four-way valve is controlled to switch the conduction state.

6. The dehumidification apparatus of claim 1, wherein, The dehumidification device further comprises: When the dehumidification mode is the no-exhaust-air reheating dehumidification mode, the control module further comprises control of the supply fan to start and adjustment of the air volume of the supply fan according to the supply air temperature.

7. The dehumidification apparatus of claim 1, wherein, The control module further comprises acquisition of a set fresh air volume and determination of the dehumidification mode according to the set fresh air volume; When the set fresh air volume is low, the no-exhaust-air reheating dehumidification mode is executed; When the set fresh air volume is high, the exhaust-air reheating dehumidification mode is executed.

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